git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-4965.h"
  49 #include "iwl-helpers.h"
  50
  51 #ifdef CONFIG_IWL4965_DEBUG
  52 u32 iwl4965_debug_level;
  53 #endif
  54
  55 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
  56                                   struct iwl4965_tx_queue *txq);
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /* module parameters */
  65 static int iwl4965_param_disable_hw_scan; /* def: 0 = use 4965's h/w scan */
  66 static int iwl4965_param_debug;    /* def: 0 = minimal debug log messages */
  67 static int iwl4965_param_disable;  /* def: enable radio */
  68 static int iwl4965_param_antenna;  /* def: 0 = both antennas (use diversity) */
  69 int iwl4965_param_hwcrypto;        /* def: using software encryption */
  70 static int iwl4965_param_qos_enable = 1; /* def: 1 = use quality of service */
  71 int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 16 Tx queues */
  72 int iwl4965_param_amsdu_size_8K;   /* def: enable 8K amsdu size */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  80
  81 #ifdef CONFIG_IWL4965_DEBUG
  82 #define VD "d"
  83 #else
  84 #define VD
  85 #endif
  86
  87 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  88 #define VS "s"
  89 #else
  90 #define VS
  91 #endif
  92
  93 #define IWLWIFI_VERSION "1.2.23k" VD VS
  94 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  95 #define DRV_VERSION     IWLWIFI_VERSION
  96
  97 /* Change firmware file name, using "-" and incrementing number,
  98  *   *only* when uCode interface or architecture changes so that it
  99  *   is not compatible with earlier drivers.
 100  * This number will also appear in << 8 position of 1st dword of uCode file */
 101 #define IWL4965_UCODE_API "-1"
 102
 103 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 104 MODULE_VERSION(DRV_VERSION);
 105 MODULE_AUTHOR(DRV_COPYRIGHT);
 106 MODULE_LICENSE("GPL");
 107
 108 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 109 {
 110         u16 fc = le16_to_cpu(hdr->frame_control);
 111         int hdr_len = ieee80211_get_hdrlen(fc);
 112
 113         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 114                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 115         return NULL;
 116 }
 117
 118 static const struct ieee80211_hw_mode *iwl4965_get_hw_mode(
 119                 struct iwl4965_priv *priv, int mode)
 120 {
 121         int i;
 122
 123         for (i = 0; i < 3; i++)
 124                 if (priv->modes[i].mode == mode)
 125                         return &priv->modes[i];
 126
 127         return NULL;
 128 }
 129
 130 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 131 {
 132         /* Single white space is for Linksys APs */
 133         if (essid_len == 1 && essid[0] == ' ')
 134                 return 1;
 135
 136         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 137         while (essid_len) {
 138                 essid_len--;
 139                 if (essid[essid_len] != '\0')
 140                         return 0;
 141         }
 142
 143         return 1;
 144 }
 145
 146 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 147 {
 148         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 149         const char *s = essid;
 150         char *d = escaped;
 151
 152         if (iwl4965_is_empty_essid(essid, essid_len)) {
 153                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 154                 return escaped;
 155         }
 156
 157         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 158         while (essid_len--) {
 159                 if (*s == '\0') {
 160                         *d++ = '\\';
 161                         *d++ = '0';
 162                         s++;
 163                 } else
 164                         *d++ = *s++;
 165         }
 166         *d = '\0';
 167         return escaped;
 168 }
 169
 170 static void iwl4965_print_hex_dump(int level, void *p, u32 len)
 171 {
 172 #ifdef CONFIG_IWL4965_DEBUG
 173         if (!(iwl4965_debug_level & level))
 174                 return;
 175
 176         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 177                         p, len, 1);
 178 #endif
 179 }
 180
 181 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 182  * DMA services
 183  *
 184  * Theory of operation
 185  *
 186  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 187  * of buffer descriptors, each of which points to one or more data buffers for
 188  * the device to read from or fill.  Driver and device exchange status of each
 189  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 190  * entries in each circular buffer, to protect against confusing empty and full
 191  * queue states.
 192  *
 193  * The device reads or writes the data in the queues via the device's several
 194  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 195  *
 196  * For Tx queue, there are low mark and high mark limits. If, after queuing
 197  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 198  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 199  * Tx queue resumed.
 200  *
 201  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 202  * queue (#4) for sending commands to the device firmware, and 15 other
 203  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 204  *
 205  * See more detailed info in iwl-4965-hw.h.
 206  ***************************************************/
 207
 208 static int iwl4965_queue_space(const struct iwl4965_queue *q)
 209 {
 210         int s = q->read_ptr - q->write_ptr;
 211
 212         if (q->read_ptr > q->write_ptr)
 213                 s -= q->n_bd;
 214
 215         if (s <= 0)
 216                 s += q->n_window;
 217         /* keep some reserve to not confuse empty and full situations */
 218         s -= 2;
 219         if (s < 0)
 220                 s = 0;
 221         return s;
 222 }
 223
 224 /**
 225  * iwl4965_queue_inc_wrap - increment queue index, wrap back to beginning
 226  * @index -- current index
 227  * @n_bd -- total number of entries in queue (must be power of 2)
 228  */
 229 static inline int iwl4965_queue_inc_wrap(int index, int n_bd)
 230 {
 231         return ++index & (n_bd - 1);
 232 }
 233
 234 /**
 235  * iwl4965_queue_dec_wrap - decrement queue index, wrap back to end
 236  * @index -- current index
 237  * @n_bd -- total number of entries in queue (must be power of 2)
 238  */
 239 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
 240 {
 241         return --index & (n_bd - 1);
 242 }
 243
 244 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 245 {
 246         return q->write_ptr > q->read_ptr ?
 247                 (i >= q->read_ptr && i < q->write_ptr) :
 248                 !(i < q->read_ptr && i >= q->write_ptr);
 249 }
 250
 251 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 252 {
 253         /* This is for scan command, the big buffer at end of command array */
 254         if (is_huge)
 255                 return q->n_window;     /* must be power of 2 */
 256
 257         /* Otherwise, use normal size buffers */
 258         return index & (q->n_window - 1);
 259 }
 260
 261 /**
 262  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 263  */
 264 static int iwl4965_queue_init(struct iwl4965_priv *priv, struct iwl4965_queue *q,
 265                           int count, int slots_num, u32 id)
 266 {
 267         q->n_bd = count;
 268         q->n_window = slots_num;
 269         q->id = id;
 270
 271         /* count must be power-of-two size, otherwise iwl4965_queue_inc_wrap
 272          * and iwl4965_queue_dec_wrap are broken. */
 273         BUG_ON(!is_power_of_2(count));
 274
 275         /* slots_num must be power-of-two size, otherwise
 276          * get_cmd_index is broken. */
 277         BUG_ON(!is_power_of_2(slots_num));
 278
 279         q->low_mark = q->n_window / 4;
 280         if (q->low_mark < 4)
 281                 q->low_mark = 4;
 282
 283         q->high_mark = q->n_window / 8;
 284         if (q->high_mark < 2)
 285                 q->high_mark = 2;
 286
 287         q->write_ptr = q->read_ptr = 0;
 288
 289         return 0;
 290 }
 291
 292 /**
 293  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 294  */
 295 static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv,
 296                               struct iwl4965_tx_queue *txq, u32 id)
 297 {
 298         struct pci_dev *dev = priv->pci_dev;
 299
 300         /* Driver private data, only for Tx (not command) queues,
 301          * not shared with device. */
 302         if (id != IWL_CMD_QUEUE_NUM) {
 303                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 304                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 305                 if (!txq->txb) {
 306                         IWL_ERROR("kmalloc for auxiliary BD "
 307                                   "structures failed\n");
 308                         goto error;
 309                 }
 310         } else
 311                 txq->txb = NULL;
 312
 313         /* Circular buffer of transmit frame descriptors (TFDs),
 314          * shared with device */
 315         txq->bd = pci_alloc_consistent(dev,
 316                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 317                         &txq->q.dma_addr);
 318
 319         if (!txq->bd) {
 320                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 321                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 322                 goto error;
 323         }
 324         txq->q.id = id;
 325
 326         return 0;
 327
 328  error:
 329         if (txq->txb) {
 330                 kfree(txq->txb);
 331                 txq->txb = NULL;
 332         }
 333
 334         return -ENOMEM;
 335 }
 336
 337 /**
 338  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 339  */
 340 int iwl4965_tx_queue_init(struct iwl4965_priv *priv,
 341                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 342 {
 343         struct pci_dev *dev = priv->pci_dev;
 344         int len;
 345         int rc = 0;
 346
 347         /*
 348          * Alloc buffer array for commands (Tx or other types of commands).
 349          * For the command queue (#4), allocate command space + one big
 350          * command for scan, since scan command is very huge; the system will
 351          * not have two scans at the same time, so only one is needed.
 352          * For normal Tx queues (all other queues), no super-size command
 353          * space is needed.
 354          */
 355         len = sizeof(struct iwl4965_cmd) * slots_num;
 356         if (txq_id == IWL_CMD_QUEUE_NUM)
 357                 len +=  IWL_MAX_SCAN_SIZE;
 358         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 359         if (!txq->cmd)
 360                 return -ENOMEM;
 361
 362         /* Alloc driver data array and TFD circular buffer */
 363         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 364         if (rc) {
 365                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 366
 367                 return -ENOMEM;
 368         }
 369         txq->need_update = 0;
 370
 371         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 372          * iwl4965_queue_inc_wrap and iwl4965_queue_dec_wrap are broken. */
 373         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 374
 375         /* Initialize queue's high/low-water marks, and head/tail indexes */
 376         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 377
 378         /* Tell device where to find queue */
 379         iwl4965_hw_tx_queue_init(priv, txq);
 380
 381         return 0;
 382 }
 383
 384 /**
 385  * iwl4965_tx_queue_free - Deallocate DMA queue.
 386  * @txq: Transmit queue to deallocate.
 387  *
 388  * Empty queue by removing and destroying all BD's.
 389  * Free all buffers.
 390  * 0-fill, but do not free "txq" descriptor structure.
 391  */
 392 void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
 393 {
 394         struct iwl4965_queue *q = &txq->q;
 395         struct pci_dev *dev = priv->pci_dev;
 396         int len;
 397
 398         if (q->n_bd == 0)
 399                 return;
 400
 401         /* first, empty all BD's */
 402         for (; q->write_ptr != q->read_ptr;
 403              q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd))
 404                 iwl4965_hw_txq_free_tfd(priv, txq);
 405
 406         len = sizeof(struct iwl4965_cmd) * q->n_window;
 407         if (q->id == IWL_CMD_QUEUE_NUM)
 408                 len += IWL_MAX_SCAN_SIZE;
 409
 410         /* De-alloc array of command/tx buffers */
 411         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 412
 413         /* De-alloc circular buffer of TFDs */
 414         if (txq->q.n_bd)
 415                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 416                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 417
 418         /* De-alloc array of per-TFD driver data */
 419         if (txq->txb) {
 420                 kfree(txq->txb);
 421                 txq->txb = NULL;
 422         }
 423
 424         /* 0-fill queue descriptor structure */
 425         memset(txq, 0, sizeof(*txq));
 426 }
 427
 428 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 429
 430 /*************** STATION TABLE MANAGEMENT ****
 431  * mac80211 should be examined to determine if sta_info is duplicating
 432  * the functionality provided here
 433  */
 434
 435 /**************************************************************/
 436
 437 #if 0 /* temporary disable till we add real remove station */
 438 /**
 439  * iwl4965_remove_station - Remove driver's knowledge of station.
 440  *
 441  * NOTE:  This does not remove station from device's station table.
 442  */
 443 static u8 iwl4965_remove_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
 444 {
 445         int index = IWL_INVALID_STATION;
 446         int i;
 447         unsigned long flags;
 448
 449         spin_lock_irqsave(&priv->sta_lock, flags);
 450
 451         if (is_ap)
 452                 index = IWL_AP_ID;
 453         else if (is_broadcast_ether_addr(addr))
 454                 index = priv->hw_setting.bcast_sta_id;
 455         else
 456                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 457                         if (priv->stations[i].used &&
 458                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 459                                                 addr)) {
 460                                 index = i;
 461                                 break;
 462                         }
 463
 464         if (unlikely(index == IWL_INVALID_STATION))
 465                 goto out;
 466
 467         if (priv->stations[index].used) {
 468                 priv->stations[index].used = 0;
 469                 priv->num_stations--;
 470         }
 471
 472         BUG_ON(priv->num_stations < 0);
 473
 474 out:
 475         spin_unlock_irqrestore(&priv->sta_lock, flags);
 476         return 0;
 477 }
 478 #endif
 479
 480 /**
 481  * iwl4965_clear_stations_table - Clear the driver's station table
 482  *
 483  * NOTE:  This does not clear or otherwise alter the device's station table.
 484  */
 485 static void iwl4965_clear_stations_table(struct iwl4965_priv *priv)
 486 {
 487         unsigned long flags;
 488
 489         spin_lock_irqsave(&priv->sta_lock, flags);
 490
 491         priv->num_stations = 0;
 492         memset(priv->stations, 0, sizeof(priv->stations));
 493
 494         spin_unlock_irqrestore(&priv->sta_lock, flags);
 495 }
 496
 497 /**
 498  * iwl4965_add_station_flags - Add station to tables in driver and device
 499  */
 500 u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr,
 501                                 int is_ap, u8 flags, void *ht_data)
 502 {
 503         int i;
 504         int index = IWL_INVALID_STATION;
 505         struct iwl4965_station_entry *station;
 506         unsigned long flags_spin;
 507         DECLARE_MAC_BUF(mac);
 508
 509         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 510         if (is_ap)
 511                 index = IWL_AP_ID;
 512         else if (is_broadcast_ether_addr(addr))
 513                 index = priv->hw_setting.bcast_sta_id;
 514         else
 515                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 516                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 517                                                 addr)) {
 518                                 index = i;
 519                                 break;
 520                         }
 521
 522                         if (!priv->stations[i].used &&
 523                             index == IWL_INVALID_STATION)
 524                                 index = i;
 525                 }
 526
 527
 528         /* These two conditions have the same outcome, but keep them separate
 529           since they have different meanings */
 530         if (unlikely(index == IWL_INVALID_STATION)) {
 531                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 532                 return index;
 533         }
 534
 535         if (priv->stations[index].used &&
 536             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 537                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 538                 return index;
 539         }
 540
 541
 542         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 543         station = &priv->stations[index];
 544         station->used = 1;
 545         priv->num_stations++;
 546
 547         /* Set up the REPLY_ADD_STA command to send to device */
 548         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 549         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 550         station->sta.mode = 0;
 551         station->sta.sta.sta_id = index;
 552         station->sta.station_flags = 0;
 553
 554 #ifdef CONFIG_IWL4965_HT
 555         /* BCAST station and IBSS stations do not work in HT mode */
 556         if (index != priv->hw_setting.bcast_sta_id &&
 557             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 558                 iwl4965_set_ht_add_station(priv, index,
 559                                  (struct ieee80211_ht_info *) ht_data);
 560 #endif /*CONFIG_IWL4965_HT*/
 561
 562         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 563
 564         /* Add station to device's station table */
 565         iwl4965_send_add_station(priv, &station->sta, flags);
 566         return index;
 567
 568 }
 569
 570 /*************** DRIVER STATUS FUNCTIONS   *****/
 571
 572 static inline int iwl4965_is_ready(struct iwl4965_priv *priv)
 573 {
 574         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 575          * set but EXIT_PENDING is not */
 576         return test_bit(STATUS_READY, &priv->status) &&
 577                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 578                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 579 }
 580
 581 static inline int iwl4965_is_alive(struct iwl4965_priv *priv)
 582 {
 583         return test_bit(STATUS_ALIVE, &priv->status);
 584 }
 585
 586 static inline int iwl4965_is_init(struct iwl4965_priv *priv)
 587 {
 588         return test_bit(STATUS_INIT, &priv->status);
 589 }
 590
 591 static inline int iwl4965_is_rfkill(struct iwl4965_priv *priv)
 592 {
 593         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 594                test_bit(STATUS_RF_KILL_SW, &priv->status);
 595 }
 596
 597 static inline int iwl4965_is_ready_rf(struct iwl4965_priv *priv)
 598 {
 599
 600         if (iwl4965_is_rfkill(priv))
 601                 return 0;
 602
 603         return iwl4965_is_ready(priv);
 604 }
 605
 606 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 607
 608 #define IWL_CMD(x) case x : return #x
 609
 610 static const char *get_cmd_string(u8 cmd)
 611 {
 612         switch (cmd) {
 613                 IWL_CMD(REPLY_ALIVE);
 614                 IWL_CMD(REPLY_ERROR);
 615                 IWL_CMD(REPLY_RXON);
 616                 IWL_CMD(REPLY_RXON_ASSOC);
 617                 IWL_CMD(REPLY_QOS_PARAM);
 618                 IWL_CMD(REPLY_RXON_TIMING);
 619                 IWL_CMD(REPLY_ADD_STA);
 620                 IWL_CMD(REPLY_REMOVE_STA);
 621                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 622                 IWL_CMD(REPLY_TX);
 623                 IWL_CMD(REPLY_RATE_SCALE);
 624                 IWL_CMD(REPLY_LEDS_CMD);
 625                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 626                 IWL_CMD(RADAR_NOTIFICATION);
 627                 IWL_CMD(REPLY_QUIET_CMD);
 628                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 629                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 630                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 631                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 632                 IWL_CMD(POWER_TABLE_CMD);
 633                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 634                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 635                 IWL_CMD(REPLY_SCAN_CMD);
 636                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 637                 IWL_CMD(SCAN_START_NOTIFICATION);
 638                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 639                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 640                 IWL_CMD(BEACON_NOTIFICATION);
 641                 IWL_CMD(REPLY_TX_BEACON);
 642                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 643                 IWL_CMD(QUIET_NOTIFICATION);
 644                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 645                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 646                 IWL_CMD(REPLY_BT_CONFIG);
 647                 IWL_CMD(REPLY_STATISTICS_CMD);
 648                 IWL_CMD(STATISTICS_NOTIFICATION);
 649                 IWL_CMD(REPLY_CARD_STATE_CMD);
 650                 IWL_CMD(CARD_STATE_NOTIFICATION);
 651                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 652                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 653                 IWL_CMD(SENSITIVITY_CMD);
 654                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 655                 IWL_CMD(REPLY_RX_PHY_CMD);
 656                 IWL_CMD(REPLY_RX_MPDU_CMD);
 657                 IWL_CMD(REPLY_4965_RX);
 658                 IWL_CMD(REPLY_COMPRESSED_BA);
 659         default:
 660                 return "UNKNOWN";
 661
 662         }
 663 }
 664
 665 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 666
 667 /**
 668  * iwl4965_enqueue_hcmd - enqueue a uCode command
 669  * @priv: device private data point
 670  * @cmd: a point to the ucode command structure
 671  *
 672  * The function returns < 0 values to indicate the operation is
 673  * failed. On success, it turns the index (> 0) of command in the
 674  * command queue.
 675  */
 676 static int iwl4965_enqueue_hcmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 677 {
 678         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 679         struct iwl4965_queue *q = &txq->q;
 680         struct iwl4965_tfd_frame *tfd;
 681         u32 *control_flags;
 682         struct iwl4965_cmd *out_cmd;
 683         u32 idx;
 684         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 685         dma_addr_t phys_addr;
 686         int ret;
 687         unsigned long flags;
 688
 689         /* If any of the command structures end up being larger than
 690          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 691          * we will need to increase the size of the TFD entries */
 692         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 693                !(cmd->meta.flags & CMD_SIZE_HUGE));
 694
 695         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 696                 IWL_ERROR("No space for Tx\n");
 697                 return -ENOSPC;
 698         }
 699
 700         spin_lock_irqsave(&priv->hcmd_lock, flags);
 701
 702         tfd = &txq->bd[q->write_ptr];
 703         memset(tfd, 0, sizeof(*tfd));
 704
 705         control_flags = (u32 *) tfd;
 706
 707         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 708         out_cmd = &txq->cmd[idx];
 709
 710         out_cmd->hdr.cmd = cmd->id;
 711         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 712         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 713
 714         /* At this point, the out_cmd now has all of the incoming cmd
 715          * information */
 716
 717         out_cmd->hdr.flags = 0;
 718         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 719                         INDEX_TO_SEQ(q->write_ptr));
 720         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 721                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 722
 723         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 724                         offsetof(struct iwl4965_cmd, hdr);
 725         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 726
 727         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 728                      "%d bytes at %d[%d]:%d\n",
 729                      get_cmd_string(out_cmd->hdr.cmd),
 730                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 731                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 732
 733         txq->need_update = 1;
 734
 735         /* Set up entry in queue's byte count circular buffer */
 736         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 737
 738         /* Increment and update queue's write index */
 739         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
 740         iwl4965_tx_queue_update_write_ptr(priv, txq);
 741
 742         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 743         return ret ? ret : idx;
 744 }
 745
 746 static int iwl4965_send_cmd_async(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 747 {
 748         int ret;
 749
 750         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 751
 752         /* An asynchronous command can not expect an SKB to be set. */
 753         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 754
 755         /* An asynchronous command MUST have a callback. */
 756         BUG_ON(!cmd->meta.u.callback);
 757
 758         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 759                 return -EBUSY;
 760
 761         ret = iwl4965_enqueue_hcmd(priv, cmd);
 762         if (ret < 0) {
 763                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 764                           get_cmd_string(cmd->id), ret);
 765                 return ret;
 766         }
 767         return 0;
 768 }
 769
 770 static int iwl4965_send_cmd_sync(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 771 {
 772         int cmd_idx;
 773         int ret;
 774         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 775
 776         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 777
 778          /* A synchronous command can not have a callback set. */
 779         BUG_ON(cmd->meta.u.callback != NULL);
 780
 781         if (atomic_xchg(&entry, 1)) {
 782                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 783                           get_cmd_string(cmd->id));
 784                 return -EBUSY;
 785         }
 786
 787         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 788
 789         if (cmd->meta.flags & CMD_WANT_SKB)
 790                 cmd->meta.source = &cmd->meta;
 791
 792         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
 793         if (cmd_idx < 0) {
 794                 ret = cmd_idx;
 795                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 796                           get_cmd_string(cmd->id), ret);
 797                 goto out;
 798         }
 799
 800         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 801                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 802                         HOST_COMPLETE_TIMEOUT);
 803         if (!ret) {
 804                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 805                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 806                                   get_cmd_string(cmd->id),
 807                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 808
 809                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 810                         ret = -ETIMEDOUT;
 811                         goto cancel;
 812                 }
 813         }
 814
 815         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 816                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 817                                get_cmd_string(cmd->id));
 818                 ret = -ECANCELED;
 819                 goto fail;
 820         }
 821         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 822                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 823                                get_cmd_string(cmd->id));
 824                 ret = -EIO;
 825                 goto fail;
 826         }
 827         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 828                 IWL_ERROR("Error: Response NULL in '%s'\n",
 829                           get_cmd_string(cmd->id));
 830                 ret = -EIO;
 831                 goto out;
 832         }
 833
 834         ret = 0;
 835         goto out;
 836
 837 cancel:
 838         if (cmd->meta.flags & CMD_WANT_SKB) {
 839                 struct iwl4965_cmd *qcmd;
 840
 841                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 842                  * TX cmd queue. Otherwise in case the cmd comes
 843                  * in later, it will possibly set an invalid
 844                  * address (cmd->meta.source). */
 845                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 846                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 847         }
 848 fail:
 849         if (cmd->meta.u.skb) {
 850                 dev_kfree_skb_any(cmd->meta.u.skb);
 851                 cmd->meta.u.skb = NULL;
 852         }
 853 out:
 854         atomic_set(&entry, 0);
 855         return ret;
 856 }
 857
 858 int iwl4965_send_cmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 859 {
 860         if (cmd->meta.flags & CMD_ASYNC)
 861                 return iwl4965_send_cmd_async(priv, cmd);
 862
 863         return iwl4965_send_cmd_sync(priv, cmd);
 864 }
 865
 866 int iwl4965_send_cmd_pdu(struct iwl4965_priv *priv, u8 id, u16 len, const void *data)
 867 {
 868         struct iwl4965_host_cmd cmd = {
 869                 .id = id,
 870                 .len = len,
 871                 .data = data,
 872         };
 873
 874         return iwl4965_send_cmd_sync(priv, &cmd);
 875 }
 876
 877 static int __must_check iwl4965_send_cmd_u32(struct iwl4965_priv *priv, u8 id, u32 val)
 878 {
 879         struct iwl4965_host_cmd cmd = {
 880                 .id = id,
 881                 .len = sizeof(val),
 882                 .data = &val,
 883         };
 884
 885         return iwl4965_send_cmd_sync(priv, &cmd);
 886 }
 887
 888 int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
 889 {
 890         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 891 }
 892
 893 /**
 894  * iwl4965_rxon_add_station - add station into station table.
 895  *
 896  * there is only one AP station with id= IWL_AP_ID
 897  * NOTE: mutex must be held before calling this fnction
 898  */
 899 static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
 900                                 const u8 *addr, int is_ap)
 901 {
 902         u8 sta_id;
 903
 904         /* Add station to device's station table */
 905 #ifdef CONFIG_IWL4965_HT
 906         struct ieee80211_conf *conf = &priv->hw->conf;
 907         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 908
 909         if ((is_ap) &&
 910             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 911             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 912                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 913                                                    0, cur_ht_config);
 914         else
 915 #endif /* CONFIG_IWL4965_HT */
 916                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 917                                                    0, NULL);
 918
 919         /* Set up default rate scaling table in device's station table */
 920         iwl4965_add_station(priv, addr, is_ap);
 921
 922         return sta_id;
 923 }
 924
 925 /**
 926  * iwl4965_set_rxon_channel - Set the phymode and channel values in staging RXON
 927  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 928  * @channel: Any channel valid for the requested phymode
 929
 930  * In addition to setting the staging RXON, priv->phymode is also set.
 931  *
 932  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 933  * in the staging RXON flag structure based on the phymode
 934  */
 935 static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv, u8 phymode,
 936                                  u16 channel)
 937 {
 938         if (!iwl4965_get_channel_info(priv, phymode, channel)) {
 939                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 940                                channel, phymode);
 941                 return -EINVAL;
 942         }
 943
 944         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 945             (priv->phymode == phymode))
 946                 return 0;
 947
 948         priv->staging_rxon.channel = cpu_to_le16(channel);
 949         if (phymode == MODE_IEEE80211A)
 950                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 951         else
 952                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 953
 954         priv->phymode = phymode;
 955
 956         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 957
 958         return 0;
 959 }
 960
 961 /**
 962  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 963  *
 964  * NOTE:  This is really only useful during development and can eventually
 965  * be #ifdef'd out once the driver is stable and folks aren't actively
 966  * making changes
 967  */
 968 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 969 {
 970         int error = 0;
 971         int counter = 1;
 972
 973         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 974                 error |= le32_to_cpu(rxon->flags &
 975                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 976                                  RXON_FLG_RADAR_DETECT_MSK));
 977                 if (error)
 978                         IWL_WARNING("check 24G fields %d | %d\n",
 979                                     counter++, error);
 980         } else {
 981                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 982                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 983                 if (error)
 984                         IWL_WARNING("check 52 fields %d | %d\n",
 985                                     counter++, error);
 986                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 987                 if (error)
 988                         IWL_WARNING("check 52 CCK %d | %d\n",
 989                                     counter++, error);
 990         }
 991         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 992         if (error)
 993                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 994
 995         /* make sure basic rates 6Mbps and 1Mbps are supported */
 996         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 997                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 998         if (error)
 999                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
1000
1001         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
1002         if (error)
1003                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
1004
1005         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
1006                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
1007         if (error)
1008                 IWL_WARNING("check CCK and short slot %d | %d\n",
1009                             counter++, error);
1010
1011         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
1012                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
1013         if (error)
1014                 IWL_WARNING("check CCK & auto detect %d | %d\n",
1015                             counter++, error);
1016
1017         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
1018                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
1019         if (error)
1020                 IWL_WARNING("check TGG and auto detect %d | %d\n",
1021                             counter++, error);
1022
1023         if (error)
1024                 IWL_WARNING("Tuning to channel %d\n",
1025                             le16_to_cpu(rxon->channel));
1026
1027         if (error) {
1028                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
1029                 return -1;
1030         }
1031         return 0;
1032 }
1033
1034 /**
1035  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1036  * @priv: staging_rxon is compared to active_rxon
1037  *
1038  * If the RXON structure is changing enough to require a new tune,
1039  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1040  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1041  */
1042 static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
1043 {
1044
1045         /* These items are only settable from the full RXON command */
1046         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1047             compare_ether_addr(priv->staging_rxon.bssid_addr,
1048                                priv->active_rxon.bssid_addr) ||
1049             compare_ether_addr(priv->staging_rxon.node_addr,
1050                                priv->active_rxon.node_addr) ||
1051             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1052                                priv->active_rxon.wlap_bssid_addr) ||
1053             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1054             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1055             (priv->staging_rxon.air_propagation !=
1056              priv->active_rxon.air_propagation) ||
1057             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
1058              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1059             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1060              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1061             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1062             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1063                 return 1;
1064
1065         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1066          * be updated with the RXON_ASSOC command -- however only some
1067          * flag transitions are allowed using RXON_ASSOC */
1068
1069         /* Check if we are not switching bands */
1070         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1071             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1072                 return 1;
1073
1074         /* Check if we are switching association toggle */
1075         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1076                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1077                 return 1;
1078
1079         return 0;
1080 }
1081
1082 static int iwl4965_send_rxon_assoc(struct iwl4965_priv *priv)
1083 {
1084         int rc = 0;
1085         struct iwl4965_rx_packet *res = NULL;
1086         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1087         struct iwl4965_host_cmd cmd = {
1088                 .id = REPLY_RXON_ASSOC,
1089                 .len = sizeof(rxon_assoc),
1090                 .meta.flags = CMD_WANT_SKB,
1091                 .data = &rxon_assoc,
1092         };
1093         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1094         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1095
1096         if ((rxon1->flags == rxon2->flags) &&
1097             (rxon1->filter_flags == rxon2->filter_flags) &&
1098             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1099             (rxon1->ofdm_ht_single_stream_basic_rates ==
1100              rxon2->ofdm_ht_single_stream_basic_rates) &&
1101             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1102              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1103             (rxon1->rx_chain == rxon2->rx_chain) &&
1104             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1105                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1106                 return 0;
1107         }
1108
1109         rxon_assoc.flags = priv->staging_rxon.flags;
1110         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1111         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1112         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1113         rxon_assoc.reserved = 0;
1114         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1115             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1116         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1117             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1118         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1119
1120         rc = iwl4965_send_cmd_sync(priv, &cmd);
1121         if (rc)
1122                 return rc;
1123
1124         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1125         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1126                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1127                 rc = -EIO;
1128         }
1129
1130         priv->alloc_rxb_skb--;
1131         dev_kfree_skb_any(cmd.meta.u.skb);
1132
1133         return rc;
1134 }
1135
1136 /**
1137  * iwl4965_commit_rxon - commit staging_rxon to hardware
1138  *
1139  * The RXON command in staging_rxon is committed to the hardware and
1140  * the active_rxon structure is updated with the new data.  This
1141  * function correctly transitions out of the RXON_ASSOC_MSK state if
1142  * a HW tune is required based on the RXON structure changes.
1143  */
1144 static int iwl4965_commit_rxon(struct iwl4965_priv *priv)
1145 {
1146         /* cast away the const for active_rxon in this function */
1147         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1148         DECLARE_MAC_BUF(mac);
1149         int rc = 0;
1150
1151         if (!iwl4965_is_alive(priv))
1152                 return -1;
1153
1154         /* always get timestamp with Rx frame */
1155         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1156
1157         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1158         if (rc) {
1159                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1160                 return -EINVAL;
1161         }
1162
1163         /* If we don't need to send a full RXON, we can use
1164          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1165          * and other flags for the current radio configuration. */
1166         if (!iwl4965_full_rxon_required(priv)) {
1167                 rc = iwl4965_send_rxon_assoc(priv);
1168                 if (rc) {
1169                         IWL_ERROR("Error setting RXON_ASSOC "
1170                                   "configuration (%d).\n", rc);
1171                         return rc;
1172                 }
1173
1174                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1175
1176                 return 0;
1177         }
1178
1179         /* station table will be cleared */
1180         priv->assoc_station_added = 0;
1181
1182 #ifdef CONFIG_IWL4965_SENSITIVITY
1183         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1184         if (!priv->error_recovering)
1185                 priv->start_calib = 0;
1186
1187         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1188 #endif /* CONFIG_IWL4965_SENSITIVITY */
1189
1190         /* If we are currently associated and the new config requires
1191          * an RXON_ASSOC and the new config wants the associated mask enabled,
1192          * we must clear the associated from the active configuration
1193          * before we apply the new config */
1194         if (iwl4965_is_associated(priv) &&
1195             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1196                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1197                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1198
1199                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1200                                       sizeof(struct iwl4965_rxon_cmd),
1201                                       &priv->active_rxon);
1202
1203                 /* If the mask clearing failed then we set
1204                  * active_rxon back to what it was previously */
1205                 if (rc) {
1206                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1207                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1208                                   "configuration (%d).\n", rc);
1209                         return rc;
1210                 }
1211         }
1212
1213         IWL_DEBUG_INFO("Sending RXON\n"
1214                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1215                        "* channel = %d\n"
1216                        "* bssid = %s\n",
1217                        ((priv->staging_rxon.filter_flags &
1218                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1219                        le16_to_cpu(priv->staging_rxon.channel),
1220                        print_mac(mac, priv->staging_rxon.bssid_addr));
1221
1222         /* Apply the new configuration */
1223         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1224                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1225         if (rc) {
1226                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1227                 return rc;
1228         }
1229
1230         iwl4965_clear_stations_table(priv);
1231
1232 #ifdef CONFIG_IWL4965_SENSITIVITY
1233         if (!priv->error_recovering)
1234                 priv->start_calib = 0;
1235
1236         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1237         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1238 #endif /* CONFIG_IWL4965_SENSITIVITY */
1239
1240         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1241
1242         /* If we issue a new RXON command which required a tune then we must
1243          * send a new TXPOWER command or we won't be able to Tx any frames */
1244         rc = iwl4965_hw_reg_send_txpower(priv);
1245         if (rc) {
1246                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1247                 return rc;
1248         }
1249
1250         /* Add the broadcast address so we can send broadcast frames */
1251         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1252             IWL_INVALID_STATION) {
1253                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1254                 return -EIO;
1255         }
1256
1257         /* If we have set the ASSOC_MSK and we are in BSS mode then
1258          * add the IWL_AP_ID to the station rate table */
1259         if (iwl4965_is_associated(priv) &&
1260             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1261                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1262                     == IWL_INVALID_STATION) {
1263                         IWL_ERROR("Error adding AP address for transmit.\n");
1264                         return -EIO;
1265                 }
1266                 priv->assoc_station_added = 1;
1267         }
1268
1269         return 0;
1270 }
1271
1272 static int iwl4965_send_bt_config(struct iwl4965_priv *priv)
1273 {
1274         struct iwl4965_bt_cmd bt_cmd = {
1275                 .flags = 3,
1276                 .lead_time = 0xAA,
1277                 .max_kill = 1,
1278                 .kill_ack_mask = 0,
1279                 .kill_cts_mask = 0,
1280         };
1281
1282         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1283                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1284 }
1285
1286 static int iwl4965_send_scan_abort(struct iwl4965_priv *priv)
1287 {
1288         int rc = 0;
1289         struct iwl4965_rx_packet *res;
1290         struct iwl4965_host_cmd cmd = {
1291                 .id = REPLY_SCAN_ABORT_CMD,
1292                 .meta.flags = CMD_WANT_SKB,
1293         };
1294
1295         /* If there isn't a scan actively going on in the hardware
1296          * then we are in between scan bands and not actually
1297          * actively scanning, so don't send the abort command */
1298         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1299                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1300                 return 0;
1301         }
1302
1303         rc = iwl4965_send_cmd_sync(priv, &cmd);
1304         if (rc) {
1305                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1306                 return rc;
1307         }
1308
1309         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1310         if (res->u.status != CAN_ABORT_STATUS) {
1311                 /* The scan abort will return 1 for success or
1312                  * 2 for "failure".  A failure condition can be
1313                  * due to simply not being in an active scan which
1314                  * can occur if we send the scan abort before we
1315                  * the microcode has notified us that a scan is
1316                  * completed. */
1317                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1318                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1319                 clear_bit(STATUS_SCAN_HW, &priv->status);
1320         }
1321
1322         dev_kfree_skb_any(cmd.meta.u.skb);
1323
1324         return rc;
1325 }
1326
1327 static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
1328                                         struct iwl4965_cmd *cmd,
1329                                         struct sk_buff *skb)
1330 {
1331         return 1;
1332 }
1333
1334 /*
1335  * CARD_STATE_CMD
1336  *
1337  * Use: Sets the device's internal card state to enable, disable, or halt
1338  *
1339  * When in the 'enable' state the card operates as normal.
1340  * When in the 'disable' state, the card enters into a low power mode.
1341  * When in the 'halt' state, the card is shut down and must be fully
1342  * restarted to come back on.
1343  */
1344 static int iwl4965_send_card_state(struct iwl4965_priv *priv, u32 flags, u8 meta_flag)
1345 {
1346         struct iwl4965_host_cmd cmd = {
1347                 .id = REPLY_CARD_STATE_CMD,
1348                 .len = sizeof(u32),
1349                 .data = &flags,
1350                 .meta.flags = meta_flag,
1351         };
1352
1353         if (meta_flag & CMD_ASYNC)
1354                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1355
1356         return iwl4965_send_cmd(priv, &cmd);
1357 }
1358
1359 static int iwl4965_add_sta_sync_callback(struct iwl4965_priv *priv,
1360                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1361 {
1362         struct iwl4965_rx_packet *res = NULL;
1363
1364         if (!skb) {
1365                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1366                 return 1;
1367         }
1368
1369         res = (struct iwl4965_rx_packet *)skb->data;
1370         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1371                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1372                           res->hdr.flags);
1373                 return 1;
1374         }
1375
1376         switch (res->u.add_sta.status) {
1377         case ADD_STA_SUCCESS_MSK:
1378                 break;
1379         default:
1380                 break;
1381         }
1382
1383         /* We didn't cache the SKB; let the caller free it */
1384         return 1;
1385 }
1386
1387 int iwl4965_send_add_station(struct iwl4965_priv *priv,
1388                          struct iwl4965_addsta_cmd *sta, u8 flags)
1389 {
1390         struct iwl4965_rx_packet *res = NULL;
1391         int rc = 0;
1392         struct iwl4965_host_cmd cmd = {
1393                 .id = REPLY_ADD_STA,
1394                 .len = sizeof(struct iwl4965_addsta_cmd),
1395                 .meta.flags = flags,
1396                 .data = sta,
1397         };
1398
1399         if (flags & CMD_ASYNC)
1400                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1401         else
1402                 cmd.meta.flags |= CMD_WANT_SKB;
1403
1404         rc = iwl4965_send_cmd(priv, &cmd);
1405
1406         if (rc || (flags & CMD_ASYNC))
1407                 return rc;
1408
1409         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1410         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1411                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1412                           res->hdr.flags);
1413                 rc = -EIO;
1414         }
1415
1416         if (rc == 0) {
1417                 switch (res->u.add_sta.status) {
1418                 case ADD_STA_SUCCESS_MSK:
1419                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1420                         break;
1421                 default:
1422                         rc = -EIO;
1423                         IWL_WARNING("REPLY_ADD_STA failed\n");
1424                         break;
1425                 }
1426         }
1427
1428         priv->alloc_rxb_skb--;
1429         dev_kfree_skb_any(cmd.meta.u.skb);
1430
1431         return rc;
1432 }
1433
1434 static int iwl4965_update_sta_key_info(struct iwl4965_priv *priv,
1435                                    struct ieee80211_key_conf *keyconf,
1436                                    u8 sta_id)
1437 {
1438         unsigned long flags;
1439         __le16 key_flags = 0;
1440
1441         switch (keyconf->alg) {
1442         case ALG_CCMP:
1443                 key_flags |= STA_KEY_FLG_CCMP;
1444                 key_flags |= cpu_to_le16(
1445                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1446                 key_flags &= ~STA_KEY_FLG_INVALID;
1447                 break;
1448         case ALG_TKIP:
1449         case ALG_WEP:
1450         default:
1451                 return -EINVAL;
1452         }
1453         spin_lock_irqsave(&priv->sta_lock, flags);
1454         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1455         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1456         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1457                keyconf->keylen);
1458
1459         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1460                keyconf->keylen);
1461         priv->stations[sta_id].sta.key.key_flags = key_flags;
1462         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1463         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1464
1465         spin_unlock_irqrestore(&priv->sta_lock, flags);
1466
1467         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1468         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1469         return 0;
1470 }
1471
1472 static int iwl4965_clear_sta_key_info(struct iwl4965_priv *priv, u8 sta_id)
1473 {
1474         unsigned long flags;
1475
1476         spin_lock_irqsave(&priv->sta_lock, flags);
1477         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1478         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1479         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1480         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1481         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1482         spin_unlock_irqrestore(&priv->sta_lock, flags);
1483
1484         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1485         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1486         return 0;
1487 }
1488
1489 static void iwl4965_clear_free_frames(struct iwl4965_priv *priv)
1490 {
1491         struct list_head *element;
1492
1493         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1494                        priv->frames_count);
1495
1496         while (!list_empty(&priv->free_frames)) {
1497                 element = priv->free_frames.next;
1498                 list_del(element);
1499                 kfree(list_entry(element, struct iwl4965_frame, list));
1500                 priv->frames_count--;
1501         }
1502
1503         if (priv->frames_count) {
1504                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1505                             priv->frames_count);
1506                 priv->frames_count = 0;
1507         }
1508 }
1509
1510 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl4965_priv *priv)
1511 {
1512         struct iwl4965_frame *frame;
1513         struct list_head *element;
1514         if (list_empty(&priv->free_frames)) {
1515                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1516                 if (!frame) {
1517                         IWL_ERROR("Could not allocate frame!\n");
1518                         return NULL;
1519                 }
1520
1521                 priv->frames_count++;
1522                 return frame;
1523         }
1524
1525         element = priv->free_frames.next;
1526         list_del(element);
1527         return list_entry(element, struct iwl4965_frame, list);
1528 }
1529
1530 static void iwl4965_free_frame(struct iwl4965_priv *priv, struct iwl4965_frame *frame)
1531 {
1532         memset(frame, 0, sizeof(*frame));
1533         list_add(&frame->list, &priv->free_frames);
1534 }
1535
1536 unsigned int iwl4965_fill_beacon_frame(struct iwl4965_priv *priv,
1537                                 struct ieee80211_hdr *hdr,
1538                                 const u8 *dest, int left)
1539 {
1540
1541         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1542             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1543              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1544                 return 0;
1545
1546         if (priv->ibss_beacon->len > left)
1547                 return 0;
1548
1549         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1550
1551         return priv->ibss_beacon->len;
1552 }
1553
1554 int iwl4965_rate_index_from_plcp(int plcp)
1555 {
1556         int i = 0;
1557
1558         /* 4965 HT rate format */
1559         if (plcp & RATE_MCS_HT_MSK) {
1560                 i = (plcp & 0xff);
1561
1562                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1563                         i = i - IWL_RATE_MIMO_6M_PLCP;
1564
1565                 i += IWL_FIRST_OFDM_RATE;
1566                 /* skip 9M not supported in ht*/
1567                 if (i >= IWL_RATE_9M_INDEX)
1568                         i += 1;
1569                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1570                     (i <= IWL_LAST_OFDM_RATE))
1571                         return i;
1572
1573         /* 4965 legacy rate format, search for match in table */
1574         } else {
1575                 for (i = 0; i < ARRAY_SIZE(iwl4965_rates); i++)
1576                         if (iwl4965_rates[i].plcp == (plcp &0xFF))
1577                                 return i;
1578         }
1579         return -1;
1580 }
1581
1582 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1583 {
1584         u8 i;
1585
1586         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1587              i = iwl4965_rates[i].next_ieee) {
1588                 if (rate_mask & (1 << i))
1589                         return iwl4965_rates[i].plcp;
1590         }
1591
1592         return IWL_RATE_INVALID;
1593 }
1594
1595 static int iwl4965_send_beacon_cmd(struct iwl4965_priv *priv)
1596 {
1597         struct iwl4965_frame *frame;
1598         unsigned int frame_size;
1599         int rc;
1600         u8 rate;
1601
1602         frame = iwl4965_get_free_frame(priv);
1603
1604         if (!frame) {
1605                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1606                           "command.\n");
1607                 return -ENOMEM;
1608         }
1609
1610         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1611                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1612                                                 0xFF0);
1613                 if (rate == IWL_INVALID_RATE)
1614                         rate = IWL_RATE_6M_PLCP;
1615         } else {
1616                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1617                 if (rate == IWL_INVALID_RATE)
1618                         rate = IWL_RATE_1M_PLCP;
1619         }
1620
1621         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1622
1623         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1624                               &frame->u.cmd[0]);
1625
1626         iwl4965_free_frame(priv, frame);
1627
1628         return rc;
1629 }
1630
1631 /******************************************************************************
1632  *
1633  * EEPROM related functions
1634  *
1635  ******************************************************************************/
1636
1637 static void get_eeprom_mac(struct iwl4965_priv *priv, u8 *mac)
1638 {
1639         memcpy(mac, priv->eeprom.mac_address, 6);
1640 }
1641
1642 static inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv *priv)
1643 {
1644         iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1645                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
1646 }
1647
1648 /**
1649  * iwl4965_eeprom_init - read EEPROM contents
1650  *
1651  * Load the EEPROM contents from adapter into priv->eeprom
1652  *
1653  * NOTE:  This routine uses the non-debug IO access functions.
1654  */
1655 int iwl4965_eeprom_init(struct iwl4965_priv *priv)
1656 {
1657         __le16 *e = (__le16 *)&priv->eeprom;
1658         u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
1659         u32 r;
1660         int sz = sizeof(priv->eeprom);
1661         int rc;
1662         int i;
1663         u16 addr;
1664
1665         /* The EEPROM structure has several padding buffers within it
1666          * and when adding new EEPROM maps is subject to programmer errors
1667          * which may be very difficult to identify without explicitly
1668          * checking the resulting size of the eeprom map. */
1669         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1670
1671         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1672                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1673                 return -ENOENT;
1674         }
1675
1676         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1677         rc = iwl4965_eeprom_acquire_semaphore(priv);
1678         if (rc < 0) {
1679                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1680                 return -ENOENT;
1681         }
1682
1683         /* eeprom is an array of 16bit values */
1684         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1685                 _iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
1686                 _iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1687
1688                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1689                                         i += IWL_EEPROM_ACCESS_DELAY) {
1690                         r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
1691                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1692                                 break;
1693                         udelay(IWL_EEPROM_ACCESS_DELAY);
1694                 }
1695
1696                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1697                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1698                         rc = -ETIMEDOUT;
1699                         goto done;
1700                 }
1701                 e[addr / 2] = cpu_to_le16(r >> 16);
1702         }
1703         rc = 0;
1704
1705 done:
1706         iwl4965_eeprom_release_semaphore(priv);
1707         return rc;
1708 }
1709
1710 /******************************************************************************
1711  *
1712  * Misc. internal state and helper functions
1713  *
1714  ******************************************************************************/
1715 #ifdef CONFIG_IWL4965_DEBUG
1716
1717 /**
1718  * iwl4965_report_frame - dump frame to syslog during debug sessions
1719  *
1720  * You may hack this function to show different aspects of received frames,
1721  * including selective frame dumps.
1722  * group100 parameter selects whether to show 1 out of 100 good frames.
1723  *
1724  * TODO:  This was originally written for 3945, need to audit for
1725  *        proper operation with 4965.
1726  */
1727 void iwl4965_report_frame(struct iwl4965_priv *priv,
1728                       struct iwl4965_rx_packet *pkt,
1729                       struct ieee80211_hdr *header, int group100)
1730 {
1731         u32 to_us;
1732         u32 print_summary = 0;
1733         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1734         u32 hundred = 0;
1735         u32 dataframe = 0;
1736         u16 fc;
1737         u16 seq_ctl;
1738         u16 channel;
1739         u16 phy_flags;
1740         int rate_sym;
1741         u16 length;
1742         u16 status;
1743         u16 bcn_tmr;
1744         u32 tsf_low;
1745         u64 tsf;
1746         u8 rssi;
1747         u8 agc;
1748         u16 sig_avg;
1749         u16 noise_diff;
1750         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1751         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1752         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
1753         u8 *data = IWL_RX_DATA(pkt);
1754
1755         /* MAC header */
1756         fc = le16_to_cpu(header->frame_control);
1757         seq_ctl = le16_to_cpu(header->seq_ctrl);
1758
1759         /* metadata */
1760         channel = le16_to_cpu(rx_hdr->channel);
1761         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1762         rate_sym = rx_hdr->rate;
1763         length = le16_to_cpu(rx_hdr->len);
1764
1765         /* end-of-frame status and timestamp */
1766         status = le32_to_cpu(rx_end->status);
1767         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1768         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1769         tsf = le64_to_cpu(rx_end->timestamp);
1770
1771         /* signal statistics */
1772         rssi = rx_stats->rssi;
1773         agc = rx_stats->agc;
1774         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1775         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1776
1777         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1778
1779         /* if data frame is to us and all is good,
1780          *   (optionally) print summary for only 1 out of every 100 */
1781         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1782             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1783                 dataframe = 1;
1784                 if (!group100)
1785                         print_summary = 1;      /* print each frame */
1786                 else if (priv->framecnt_to_us < 100) {
1787                         priv->framecnt_to_us++;
1788                         print_summary = 0;
1789                 } else {
1790                         priv->framecnt_to_us = 0;
1791                         print_summary = 1;
1792                         hundred = 1;
1793                 }
1794         } else {
1795                 /* print summary for all other frames */
1796                 print_summary = 1;
1797         }
1798
1799         if (print_summary) {
1800                 char *title;
1801                 u32 rate;
1802
1803                 if (hundred)
1804                         title = "100Frames";
1805                 else if (fc & IEEE80211_FCTL_RETRY)
1806                         title = "Retry";
1807                 else if (ieee80211_is_assoc_response(fc))
1808                         title = "AscRsp";
1809                 else if (ieee80211_is_reassoc_response(fc))
1810                         title = "RasRsp";
1811                 else if (ieee80211_is_probe_response(fc)) {
1812                         title = "PrbRsp";
1813                         print_dump = 1; /* dump frame contents */
1814                 } else if (ieee80211_is_beacon(fc)) {
1815                         title = "Beacon";
1816                         print_dump = 1; /* dump frame contents */
1817                 } else if (ieee80211_is_atim(fc))
1818                         title = "ATIM";
1819                 else if (ieee80211_is_auth(fc))
1820                         title = "Auth";
1821                 else if (ieee80211_is_deauth(fc))
1822                         title = "DeAuth";
1823                 else if (ieee80211_is_disassoc(fc))
1824                         title = "DisAssoc";
1825                 else
1826                         title = "Frame";
1827
1828                 rate = iwl4965_rate_index_from_plcp(rate_sym);
1829                 if (rate == -1)
1830                         rate = 0;
1831                 else
1832                         rate = iwl4965_rates[rate].ieee / 2;
1833
1834                 /* print frame summary.
1835                  * MAC addresses show just the last byte (for brevity),
1836                  *    but you can hack it to show more, if you'd like to. */
1837                 if (dataframe)
1838                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1839                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1840                                      title, fc, header->addr1[5],
1841                                      length, rssi, channel, rate);
1842                 else {
1843                         /* src/dst addresses assume managed mode */
1844                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1845                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1846                                      "phy=0x%02x, chnl=%d\n",
1847                                      title, fc, header->addr1[5],
1848                                      header->addr3[5], rssi,
1849                                      tsf_low - priv->scan_start_tsf,
1850                                      phy_flags, channel);
1851                 }
1852         }
1853         if (print_dump)
1854                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
1855 }
1856 #endif
1857
1858 static void iwl4965_unset_hw_setting(struct iwl4965_priv *priv)
1859 {
1860         if (priv->hw_setting.shared_virt)
1861                 pci_free_consistent(priv->pci_dev,
1862                                     sizeof(struct iwl4965_shared),
1863                                     priv->hw_setting.shared_virt,
1864                                     priv->hw_setting.shared_phys);
1865 }
1866
1867 /**
1868  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1869  *
1870  * return : set the bit for each supported rate insert in ie
1871  */
1872 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1873                                     u16 basic_rate, int *left)
1874 {
1875         u16 ret_rates = 0, bit;
1876         int i;
1877         u8 *cnt = ie;
1878         u8 *rates = ie + 1;
1879
1880         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1881                 if (bit & supported_rate) {
1882                         ret_rates |= bit;
1883                         rates[*cnt] = iwl4965_rates[i].ieee |
1884                                 ((bit & basic_rate) ? 0x80 : 0x00);
1885                         (*cnt)++;
1886                         (*left)--;
1887                         if ((*left <= 0) ||
1888                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1889                                 break;
1890                 }
1891         }
1892
1893         return ret_rates;
1894 }
1895
1896 #ifdef CONFIG_IWL4965_HT
1897 void static iwl4965_set_ht_capab(struct ieee80211_hw *hw,
1898                              struct ieee80211_ht_cap *ht_cap,
1899                              u8 use_current_config);
1900 #endif
1901
1902 /**
1903  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1904  */
1905 static u16 iwl4965_fill_probe_req(struct iwl4965_priv *priv,
1906                               struct ieee80211_mgmt *frame,
1907                               int left, int is_direct)
1908 {
1909         int len = 0;
1910         u8 *pos = NULL;
1911         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1912 #ifdef CONFIG_IWL4965_HT
1913         struct ieee80211_hw_mode *mode;
1914 #endif /* CONFIG_IWL4965_HT */
1915
1916         /* Make sure there is enough space for the probe request,
1917          * two mandatory IEs and the data */
1918         left -= 24;
1919         if (left < 0)
1920                 return 0;
1921         len += 24;
1922
1923         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1924         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1925         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1926         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1927         frame->seq_ctrl = 0;
1928
1929         /* fill in our indirect SSID IE */
1930         /* ...next IE... */
1931
1932         left -= 2;
1933         if (left < 0)
1934                 return 0;
1935         len += 2;
1936         pos = &(frame->u.probe_req.variable[0]);
1937         *pos++ = WLAN_EID_SSID;
1938         *pos++ = 0;
1939
1940         /* fill in our direct SSID IE... */
1941         if (is_direct) {
1942                 /* ...next IE... */
1943                 left -= 2 + priv->essid_len;
1944                 if (left < 0)
1945                         return 0;
1946                 /* ... fill it in... */
1947                 *pos++ = WLAN_EID_SSID;
1948                 *pos++ = priv->essid_len;
1949                 memcpy(pos, priv->essid, priv->essid_len);
1950                 pos += priv->essid_len;
1951                 len += 2 + priv->essid_len;
1952         }
1953
1954         /* fill in supported rate */
1955         /* ...next IE... */
1956         left -= 2;
1957         if (left < 0)
1958                 return 0;
1959
1960         /* ... fill it in... */
1961         *pos++ = WLAN_EID_SUPP_RATES;
1962         *pos = 0;
1963
1964         /* exclude 60M rate */
1965         active_rates = priv->rates_mask;
1966         active_rates &= ~IWL_RATE_60M_MASK;
1967
1968         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1969
1970         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1971         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1972                         active_rate_basic, &left);
1973         active_rates &= ~ret_rates;
1974
1975         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1976                                  active_rate_basic, &left);
1977         active_rates &= ~ret_rates;
1978
1979         len += 2 + *pos;
1980         pos += (*pos) + 1;
1981         if (active_rates == 0)
1982                 goto fill_end;
1983
1984         /* fill in supported extended rate */
1985         /* ...next IE... */
1986         left -= 2;
1987         if (left < 0)
1988                 return 0;
1989         /* ... fill it in... */
1990         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1991         *pos = 0;
1992         iwl4965_supported_rate_to_ie(pos, active_rates,
1993                                  active_rate_basic, &left);
1994         if (*pos > 0)
1995                 len += 2 + *pos;
1996
1997 #ifdef CONFIG_IWL4965_HT
1998         mode = priv->hw->conf.mode;
1999         if (mode->ht_info.ht_supported) {
2000                 pos += (*pos) + 1;
2001                 *pos++ = WLAN_EID_HT_CAPABILITY;
2002                 *pos++ = sizeof(struct ieee80211_ht_cap);
2003                 iwl4965_set_ht_capab(priv->hw,
2004                                 (struct ieee80211_ht_cap *)pos, 0);
2005                 len += 2 + sizeof(struct ieee80211_ht_cap);
2006         }
2007 #endif  /*CONFIG_IWL4965_HT */
2008
2009  fill_end:
2010         return (u16)len;
2011 }
2012
2013 /*
2014  * QoS  support
2015 */
2016 #ifdef CONFIG_IWL4965_QOS
2017 static int iwl4965_send_qos_params_command(struct iwl4965_priv *priv,
2018                                        struct iwl4965_qosparam_cmd *qos)
2019 {
2020
2021         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
2022                                 sizeof(struct iwl4965_qosparam_cmd), qos);
2023 }
2024
2025 static void iwl4965_reset_qos(struct iwl4965_priv *priv)
2026 {
2027         u16 cw_min = 15;
2028         u16 cw_max = 1023;
2029         u8 aifs = 2;
2030         u8 is_legacy = 0;
2031         unsigned long flags;
2032         int i;
2033
2034         spin_lock_irqsave(&priv->lock, flags);
2035         priv->qos_data.qos_active = 0;
2036
2037         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
2038                 if (priv->qos_data.qos_enable)
2039                         priv->qos_data.qos_active = 1;
2040                 if (!(priv->active_rate & 0xfff0)) {
2041                         cw_min = 31;
2042                         is_legacy = 1;
2043                 }
2044         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2045                 if (priv->qos_data.qos_enable)
2046                         priv->qos_data.qos_active = 1;
2047         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
2048                 cw_min = 31;
2049                 is_legacy = 1;
2050         }
2051
2052         if (priv->qos_data.qos_active)
2053                 aifs = 3;
2054
2055         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
2056         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
2057         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
2058         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
2059         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
2060
2061         if (priv->qos_data.qos_active) {
2062                 i = 1;
2063                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
2064                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
2065                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
2066                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2067                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2068
2069                 i = 2;
2070                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2071                         cpu_to_le16((cw_min + 1) / 2 - 1);
2072                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2073                         cpu_to_le16(cw_max);
2074                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2075                 if (is_legacy)
2076                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2077                                 cpu_to_le16(6016);
2078                 else
2079                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2080                                 cpu_to_le16(3008);
2081                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2082
2083                 i = 3;
2084                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2085                         cpu_to_le16((cw_min + 1) / 4 - 1);
2086                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2087                         cpu_to_le16((cw_max + 1) / 2 - 1);
2088                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2089                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2090                 if (is_legacy)
2091                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2092                                 cpu_to_le16(3264);
2093                 else
2094                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2095                                 cpu_to_le16(1504);
2096         } else {
2097                 for (i = 1; i < 4; i++) {
2098                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2099                                 cpu_to_le16(cw_min);
2100                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2101                                 cpu_to_le16(cw_max);
2102                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2103                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2104                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2105                 }
2106         }
2107         IWL_DEBUG_QOS("set QoS to default \n");
2108
2109         spin_unlock_irqrestore(&priv->lock, flags);
2110 }
2111
2112 static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
2113 {
2114         unsigned long flags;
2115
2116         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2117                 return;
2118
2119         if (!priv->qos_data.qos_enable)
2120                 return;
2121
2122         spin_lock_irqsave(&priv->lock, flags);
2123         priv->qos_data.def_qos_parm.qos_flags = 0;
2124
2125         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2126             !priv->qos_data.qos_cap.q_AP.txop_request)
2127                 priv->qos_data.def_qos_parm.qos_flags |=
2128                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2129         if (priv->qos_data.qos_active)
2130                 priv->qos_data.def_qos_parm.qos_flags |=
2131                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2132
2133 #ifdef CONFIG_IWL4965_HT
2134         if (priv->current_ht_config.is_ht)
2135                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2136 #endif /* CONFIG_IWL4965_HT */
2137
2138         spin_unlock_irqrestore(&priv->lock, flags);
2139
2140         if (force || iwl4965_is_associated(priv)) {
2141                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2142                                 priv->qos_data.qos_active,
2143                                 priv->qos_data.def_qos_parm.qos_flags);
2144
2145                 iwl4965_send_qos_params_command(priv,
2146                                 &(priv->qos_data.def_qos_parm));
2147         }
2148 }
2149
2150 #endif /* CONFIG_IWL4965_QOS */
2151 /*
2152  * Power management (not Tx power!) functions
2153  */
2154 #define MSEC_TO_USEC 1024
2155
2156 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2157 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2158 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2159 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2160                                      __constant_cpu_to_le32(X1), \
2161                                      __constant_cpu_to_le32(X2), \
2162                                      __constant_cpu_to_le32(X3), \
2163                                      __constant_cpu_to_le32(X4)}
2164
2165
2166 /* default power management (not Tx power) table values */
2167 /* for tim  0-10 */
2168 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
2169         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2170         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2171         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2172         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2173         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2174         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2175 };
2176
2177 /* for tim > 10 */
2178 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
2179         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2180         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2181                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2182         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2183                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2184         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2185                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2186         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2187         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2188                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2189 };
2190
2191 int iwl4965_power_init_handle(struct iwl4965_priv *priv)
2192 {
2193         int rc = 0, i;
2194         struct iwl4965_power_mgr *pow_data;
2195         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
2196         u16 pci_pm;
2197
2198         IWL_DEBUG_POWER("Initialize power \n");
2199
2200         pow_data = &(priv->power_data);
2201
2202         memset(pow_data, 0, sizeof(*pow_data));
2203
2204         pow_data->active_index = IWL_POWER_RANGE_0;
2205         pow_data->dtim_val = 0xffff;
2206
2207         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2208         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2209
2210         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2211         if (rc != 0)
2212                 return 0;
2213         else {
2214                 struct iwl4965_powertable_cmd *cmd;
2215
2216                 IWL_DEBUG_POWER("adjust power command flags\n");
2217
2218                 for (i = 0; i < IWL_POWER_AC; i++) {
2219                         cmd = &pow_data->pwr_range_0[i].cmd;
2220
2221                         if (pci_pm & 0x1)
2222                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2223                         else
2224                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2225                 }
2226         }
2227         return rc;
2228 }
2229
2230 static int iwl4965_update_power_cmd(struct iwl4965_priv *priv,
2231                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
2232 {
2233         int rc = 0, i;
2234         u8 skip;
2235         u32 max_sleep = 0;
2236         struct iwl4965_power_vec_entry *range;
2237         u8 period = 0;
2238         struct iwl4965_power_mgr *pow_data;
2239
2240         if (mode > IWL_POWER_INDEX_5) {
2241                 IWL_DEBUG_POWER("Error invalid power mode \n");
2242                 return -1;
2243         }
2244         pow_data = &(priv->power_data);
2245
2246         if (pow_data->active_index == IWL_POWER_RANGE_0)
2247                 range = &pow_data->pwr_range_0[0];
2248         else
2249                 range = &pow_data->pwr_range_1[1];
2250
2251         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
2252
2253 #ifdef IWL_MAC80211_DISABLE
2254         if (priv->assoc_network != NULL) {
2255                 unsigned long flags;
2256
2257                 period = priv->assoc_network->tim.tim_period;
2258         }
2259 #endif  /*IWL_MAC80211_DISABLE */
2260         skip = range[mode].no_dtim;
2261
2262         if (period == 0) {
2263                 period = 1;
2264                 skip = 0;
2265         }
2266
2267         if (skip == 0) {
2268                 max_sleep = period;
2269                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2270         } else {
2271                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2272                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2273                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2274         }
2275
2276         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2277                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2278                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2279         }
2280
2281         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2282         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2283         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2284         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2285                         le32_to_cpu(cmd->sleep_interval[0]),
2286                         le32_to_cpu(cmd->sleep_interval[1]),
2287                         le32_to_cpu(cmd->sleep_interval[2]),
2288                         le32_to_cpu(cmd->sleep_interval[3]),
2289                         le32_to_cpu(cmd->sleep_interval[4]));
2290
2291         return rc;
2292 }
2293
2294 static int iwl4965_send_power_mode(struct iwl4965_priv *priv, u32 mode)
2295 {
2296         u32 uninitialized_var(final_mode);
2297         int rc;
2298         struct iwl4965_powertable_cmd cmd;
2299
2300         /* If on battery, set to 3,
2301          * if plugged into AC power, set to CAM ("continuously aware mode"),
2302          * else user level */
2303         switch (mode) {
2304         case IWL_POWER_BATTERY:
2305                 final_mode = IWL_POWER_INDEX_3;
2306                 break;
2307         case IWL_POWER_AC:
2308                 final_mode = IWL_POWER_MODE_CAM;
2309                 break;
2310         default:
2311                 final_mode = mode;
2312                 break;
2313         }
2314
2315         cmd.keep_alive_beacons = 0;
2316
2317         iwl4965_update_power_cmd(priv, &cmd, final_mode);
2318
2319         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2320
2321         if (final_mode == IWL_POWER_MODE_CAM)
2322                 clear_bit(STATUS_POWER_PMI, &priv->status);
2323         else
2324                 set_bit(STATUS_POWER_PMI, &priv->status);
2325
2326         return rc;
2327 }
2328
2329 int iwl4965_is_network_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2330 {
2331         /* Filter incoming packets to determine if they are targeted toward
2332          * this network, discarding packets coming from ourselves */
2333         switch (priv->iw_mode) {
2334         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2335                 /* packets from our adapter are dropped (echo) */
2336                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2337                         return 0;
2338                 /* {broad,multi}cast packets to our IBSS go through */
2339                 if (is_multicast_ether_addr(header->addr1))
2340                         return !compare_ether_addr(header->addr3, priv->bssid);
2341                 /* packets to our adapter go through */
2342                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2343         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2344                 /* packets from our adapter are dropped (echo) */
2345                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2346                         return 0;
2347                 /* {broad,multi}cast packets to our BSS go through */
2348                 if (is_multicast_ether_addr(header->addr1))
2349                         return !compare_ether_addr(header->addr2, priv->bssid);
2350                 /* packets to our adapter go through */
2351                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2352         }
2353
2354         return 1;
2355 }
2356
2357 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2358
2359 static const char *iwl4965_get_tx_fail_reason(u32 status)
2360 {
2361         switch (status & TX_STATUS_MSK) {
2362         case TX_STATUS_SUCCESS:
2363                 return "SUCCESS";
2364                 TX_STATUS_ENTRY(SHORT_LIMIT);
2365                 TX_STATUS_ENTRY(LONG_LIMIT);
2366                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2367                 TX_STATUS_ENTRY(MGMNT_ABORT);
2368                 TX_STATUS_ENTRY(NEXT_FRAG);
2369                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2370                 TX_STATUS_ENTRY(DEST_PS);
2371                 TX_STATUS_ENTRY(ABORTED);
2372                 TX_STATUS_ENTRY(BT_RETRY);
2373                 TX_STATUS_ENTRY(STA_INVALID);
2374                 TX_STATUS_ENTRY(FRAG_DROPPED);
2375                 TX_STATUS_ENTRY(TID_DISABLE);
2376                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2377                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2378                 TX_STATUS_ENTRY(TX_LOCKED);
2379                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2380         }
2381
2382         return "UNKNOWN";
2383 }
2384
2385 /**
2386  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2387  *
2388  * NOTE: priv->mutex is not required before calling this function
2389  */
2390 static int iwl4965_scan_cancel(struct iwl4965_priv *priv)
2391 {
2392         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2393                 clear_bit(STATUS_SCANNING, &priv->status);
2394                 return 0;
2395         }
2396
2397         if (test_bit(STATUS_SCANNING, &priv->status)) {
2398                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2399                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2400                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2401                         queue_work(priv->workqueue, &priv->abort_scan);
2402
2403                 } else
2404                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2405
2406                 return test_bit(STATUS_SCANNING, &priv->status);
2407         }
2408
2409         return 0;
2410 }
2411
2412 /**
2413  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2414  * @ms: amount of time to wait (in milliseconds) for scan to abort
2415  *
2416  * NOTE: priv->mutex must be held before calling this function
2417  */
2418 static int iwl4965_scan_cancel_timeout(struct iwl4965_priv *priv, unsigned long ms)
2419 {
2420         unsigned long now = jiffies;
2421         int ret;
2422
2423         ret = iwl4965_scan_cancel(priv);
2424         if (ret && ms) {
2425                 mutex_unlock(&priv->mutex);
2426                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2427                                 test_bit(STATUS_SCANNING, &priv->status))
2428                         msleep(1);
2429                 mutex_lock(&priv->mutex);
2430
2431                 return test_bit(STATUS_SCANNING, &priv->status);
2432         }
2433
2434         return ret;
2435 }
2436
2437 static void iwl4965_sequence_reset(struct iwl4965_priv *priv)
2438 {
2439         /* Reset ieee stats */
2440
2441         /* We don't reset the net_device_stats (ieee->stats) on
2442          * re-association */
2443
2444         priv->last_seq_num = -1;
2445         priv->last_frag_num = -1;
2446         priv->last_packet_time = 0;
2447
2448         iwl4965_scan_cancel(priv);
2449 }
2450
2451 #define MAX_UCODE_BEACON_INTERVAL       4096
2452 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2453
2454 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2455 {
2456         u16 new_val = 0;
2457         u16 beacon_factor = 0;
2458
2459         beacon_factor =
2460             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2461                 / MAX_UCODE_BEACON_INTERVAL;
2462         new_val = beacon_val / beacon_factor;
2463
2464         return cpu_to_le16(new_val);
2465 }
2466
2467 static void iwl4965_setup_rxon_timing(struct iwl4965_priv *priv)
2468 {
2469         u64 interval_tm_unit;
2470         u64 tsf, result;
2471         unsigned long flags;
2472         struct ieee80211_conf *conf = NULL;
2473         u16 beacon_int = 0;
2474
2475         conf = ieee80211_get_hw_conf(priv->hw);
2476
2477         spin_lock_irqsave(&priv->lock, flags);
2478         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2479         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2480
2481         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2482
2483         tsf = priv->timestamp1;
2484         tsf = ((tsf << 32) | priv->timestamp0);
2485
2486         beacon_int = priv->beacon_int;
2487         spin_unlock_irqrestore(&priv->lock, flags);
2488
2489         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2490                 if (beacon_int == 0) {
2491                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2492                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2493                 } else {
2494                         priv->rxon_timing.beacon_interval =
2495                                 cpu_to_le16(beacon_int);
2496                         priv->rxon_timing.beacon_interval =
2497                             iwl4965_adjust_beacon_interval(
2498                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2499                 }
2500
2501                 priv->rxon_timing.atim_window = 0;
2502         } else {
2503                 priv->rxon_timing.beacon_interval =
2504                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2505                 /* TODO: we need to get atim_window from upper stack
2506                  * for now we set to 0 */
2507                 priv->rxon_timing.atim_window = 0;
2508         }
2509
2510         interval_tm_unit =
2511                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2512         result = do_div(tsf, interval_tm_unit);
2513         priv->rxon_timing.beacon_init_val =
2514             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2515
2516         IWL_DEBUG_ASSOC
2517             ("beacon interval %d beacon timer %d beacon tim %d\n",
2518                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2519                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2520                 le16_to_cpu(priv->rxon_timing.atim_window));
2521 }
2522
2523 static int iwl4965_scan_initiate(struct iwl4965_priv *priv)
2524 {
2525         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2526                 IWL_ERROR("APs don't scan.\n");
2527                 return 0;
2528         }
2529
2530         if (!iwl4965_is_ready_rf(priv)) {
2531                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2532                 return -EIO;
2533         }
2534
2535         if (test_bit(STATUS_SCANNING, &priv->status)) {
2536                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2537                 return -EAGAIN;
2538         }
2539
2540         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2541                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2542                                "Queuing.\n");
2543                 return -EAGAIN;
2544         }
2545
2546         IWL_DEBUG_INFO("Starting scan...\n");
2547         priv->scan_bands = 2;
2548         set_bit(STATUS_SCANNING, &priv->status);
2549         priv->scan_start = jiffies;
2550         priv->scan_pass_start = priv->scan_start;
2551
2552         queue_work(priv->workqueue, &priv->request_scan);
2553
2554         return 0;
2555 }
2556
2557 static int iwl4965_set_rxon_hwcrypto(struct iwl4965_priv *priv, int hw_decrypt)
2558 {
2559         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
2560
2561         if (hw_decrypt)
2562                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2563         else
2564                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2565
2566         return 0;
2567 }
2568
2569 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode)
2570 {
2571         if (phymode == MODE_IEEE80211A) {
2572                 priv->staging_rxon.flags &=
2573                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2574                       | RXON_FLG_CCK_MSK);
2575                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2576         } else {
2577                 /* Copied from iwl4965_bg_post_associate() */
2578                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2579                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2580                 else
2581                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2582
2583                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2584                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2585
2586                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2587                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2588                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2589         }
2590 }
2591
2592 /*
2593  * initialize rxon structure with default values from eeprom
2594  */
2595 static void iwl4965_connection_init_rx_config(struct iwl4965_priv *priv)
2596 {
2597         const struct iwl4965_channel_info *ch_info;
2598
2599         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2600
2601         switch (priv->iw_mode) {
2602         case IEEE80211_IF_TYPE_AP:
2603                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2604                 break;
2605
2606         case IEEE80211_IF_TYPE_STA:
2607                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2608                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2609                 break;
2610
2611         case IEEE80211_IF_TYPE_IBSS:
2612                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2613                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2614                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2615                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2616                 break;
2617
2618         case IEEE80211_IF_TYPE_MNTR:
2619                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2620                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2621                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2622                 break;
2623         }
2624
2625 #if 0
2626         /* TODO:  Figure out when short_preamble would be set and cache from
2627          * that */
2628         if (!hw_to_local(priv->hw)->short_preamble)
2629                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2630         else
2631                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2632 #endif
2633
2634         ch_info = iwl4965_get_channel_info(priv, priv->phymode,
2635                                        le16_to_cpu(priv->staging_rxon.channel));
2636
2637         if (!ch_info)
2638                 ch_info = &priv->channel_info[0];
2639
2640         /*
2641          * in some case A channels are all non IBSS
2642          * in this case force B/G channel
2643          */
2644         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2645             !(is_channel_ibss(ch_info)))
2646                 ch_info = &priv->channel_info[0];
2647
2648         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2649         if (is_channel_a_band(ch_info))
2650                 priv->phymode = MODE_IEEE80211A;
2651         else
2652                 priv->phymode = MODE_IEEE80211G;
2653
2654         iwl4965_set_flags_for_phymode(priv, priv->phymode);
2655
2656         priv->staging_rxon.ofdm_basic_rates =
2657             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2658         priv->staging_rxon.cck_basic_rates =
2659             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2660
2661         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2662                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2663         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2664         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2665         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2666         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2667         iwl4965_set_rxon_chain(priv);
2668 }
2669
2670 static int iwl4965_set_mode(struct iwl4965_priv *priv, int mode)
2671 {
2672         if (mode == IEEE80211_IF_TYPE_IBSS) {
2673                 const struct iwl4965_channel_info *ch_info;
2674
2675                 ch_info = iwl4965_get_channel_info(priv,
2676                         priv->phymode,
2677                         le16_to_cpu(priv->staging_rxon.channel));
2678
2679                 if (!ch_info || !is_channel_ibss(ch_info)) {
2680                         IWL_ERROR("channel %d not IBSS channel\n",
2681                                   le16_to_cpu(priv->staging_rxon.channel));
2682                         return -EINVAL;
2683                 }
2684         }
2685
2686         priv->iw_mode = mode;
2687
2688         iwl4965_connection_init_rx_config(priv);
2689         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2690
2691         iwl4965_clear_stations_table(priv);
2692
2693         /* dont commit rxon if rf-kill is on*/
2694         if (!iwl4965_is_ready_rf(priv))
2695                 return -EAGAIN;
2696
2697         cancel_delayed_work(&priv->scan_check);
2698         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2699                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2700                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2701                 return -EAGAIN;
2702         }
2703
2704         iwl4965_commit_rxon(priv);
2705
2706         return 0;
2707 }
2708
2709 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
2710                                       struct ieee80211_tx_control *ctl,
2711                                       struct iwl4965_cmd *cmd,
2712                                       struct sk_buff *skb_frag,
2713                                       int last_frag)
2714 {
2715         struct iwl4965_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2716
2717         switch (keyinfo->alg) {
2718         case ALG_CCMP:
2719                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2720                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2721                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2722                 break;
2723
2724         case ALG_TKIP:
2725 #if 0
2726                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2727
2728                 if (last_frag)
2729                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2730                                8);
2731                 else
2732                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2733 #endif
2734                 break;
2735
2736         case ALG_WEP:
2737                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2738                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2739
2740                 if (keyinfo->keylen == 13)
2741                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2742
2743                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2744
2745                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2746                              "with key %d\n", ctl->key_idx);
2747                 break;
2748
2749         default:
2750                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2751                 break;
2752         }
2753 }
2754
2755 /*
2756  * handle build REPLY_TX command notification.
2757  */
2758 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2759                                   struct iwl4965_cmd *cmd,
2760                                   struct ieee80211_tx_control *ctrl,
2761                                   struct ieee80211_hdr *hdr,
2762                                   int is_unicast, u8 std_id)
2763 {
2764         __le16 *qc;
2765         u16 fc = le16_to_cpu(hdr->frame_control);
2766         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2767
2768         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2769         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2770                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2771                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2772                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2773                 if (ieee80211_is_probe_response(fc) &&
2774                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2775                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2776         } else {
2777                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2778                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2779         }
2780
2781         if (ieee80211_is_back_request(fc))
2782                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2783
2784
2785         cmd->cmd.tx.sta_id = std_id;
2786         if (ieee80211_get_morefrag(hdr))
2787                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2788
2789         qc = ieee80211_get_qos_ctrl(hdr);
2790         if (qc) {
2791                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2792                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2793         } else
2794                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2795
2796         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2797                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2798                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2799         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2800                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2801                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2802         }
2803
2804         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2805                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2806
2807         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2808         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2809                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2810                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2811                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2812                 else
2813                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2814         } else
2815                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2816
2817         cmd->cmd.tx.driver_txop = 0;
2818         cmd->cmd.tx.tx_flags = tx_flags;
2819         cmd->cmd.tx.next_frame_len = 0;
2820 }
2821
2822 /**
2823  * iwl4965_get_sta_id - Find station's index within station table
2824  *
2825  * If new IBSS station, create new entry in station table
2826  */
2827 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2828                                 struct ieee80211_hdr *hdr)
2829 {
2830         int sta_id;
2831         u16 fc = le16_to_cpu(hdr->frame_control);
2832         DECLARE_MAC_BUF(mac);
2833
2834         /* If this frame is broadcast or management, use broadcast station id */
2835         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2836             is_multicast_ether_addr(hdr->addr1))
2837                 return priv->hw_setting.bcast_sta_id;
2838
2839         switch (priv->iw_mode) {
2840
2841         /* If we are a client station in a BSS network, use the special
2842          * AP station entry (that's the only station we communicate with) */
2843         case IEEE80211_IF_TYPE_STA:
2844                 return IWL_AP_ID;
2845
2846         /* If we are an AP, then find the station, or use BCAST */
2847         case IEEE80211_IF_TYPE_AP:
2848                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2849                 if (sta_id != IWL_INVALID_STATION)
2850                         return sta_id;
2851                 return priv->hw_setting.bcast_sta_id;
2852
2853         /* If this frame is going out to an IBSS network, find the station,
2854          * or create a new station table entry */
2855         case IEEE80211_IF_TYPE_IBSS:
2856                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2857                 if (sta_id != IWL_INVALID_STATION)
2858                         return sta_id;
2859
2860                 /* Create new station table entry */
2861                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2862                                                    0, CMD_ASYNC, NULL);
2863
2864                 if (sta_id != IWL_INVALID_STATION)
2865                         return sta_id;
2866
2867                 IWL_DEBUG_DROP("Station %s not in station map. "
2868                                "Defaulting to broadcast...\n",
2869                                print_mac(mac, hdr->addr1));
2870                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2871                 return priv->hw_setting.bcast_sta_id;
2872
2873         default:
2874                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2875                 return priv->hw_setting.bcast_sta_id;
2876         }
2877 }
2878
2879 /*
2880  * start REPLY_TX command process
2881  */
2882 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2883                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2884 {
2885         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2886         struct iwl4965_tfd_frame *tfd;
2887         u32 *control_flags;
2888         int txq_id = ctl->queue;
2889         struct iwl4965_tx_queue *txq = NULL;
2890         struct iwl4965_queue *q = NULL;
2891         dma_addr_t phys_addr;
2892         dma_addr_t txcmd_phys;
2893         dma_addr_t scratch_phys;
2894         struct iwl4965_cmd *out_cmd = NULL;
2895         u16 len, idx, len_org;
2896         u8 id, hdr_len, unicast;
2897         u8 sta_id;
2898         u16 seq_number = 0;
2899         u16 fc;
2900         __le16 *qc;
2901         u8 wait_write_ptr = 0;
2902         unsigned long flags;
2903         int rc;
2904
2905         spin_lock_irqsave(&priv->lock, flags);
2906         if (iwl4965_is_rfkill(priv)) {
2907                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2908                 goto drop_unlock;
2909         }
2910
2911         if (!priv->vif) {
2912                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2913                 goto drop_unlock;
2914         }
2915
2916         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2917                 IWL_ERROR("ERROR: No TX rate available.\n");
2918                 goto drop_unlock;
2919         }
2920
2921         unicast = !is_multicast_ether_addr(hdr->addr1);
2922         id = 0;
2923
2924         fc = le16_to_cpu(hdr->frame_control);
2925
2926 #ifdef CONFIG_IWL4965_DEBUG
2927         if (ieee80211_is_auth(fc))
2928                 IWL_DEBUG_TX("Sending AUTH frame\n");
2929         else if (ieee80211_is_assoc_request(fc))
2930                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2931         else if (ieee80211_is_reassoc_request(fc))
2932                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2933 #endif
2934
2935         /* drop all data frame if we are not associated */
2936         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2937            (!iwl4965_is_associated(priv) ||
2938             !priv->assoc_id ||
2939             !priv->assoc_station_added)) {
2940                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2941                 goto drop_unlock;
2942         }
2943
2944         spin_unlock_irqrestore(&priv->lock, flags);
2945
2946         hdr_len = ieee80211_get_hdrlen(fc);
2947
2948         /* Find (or create) index into station table for destination station */
2949         sta_id = iwl4965_get_sta_id(priv, hdr);
2950         if (sta_id == IWL_INVALID_STATION) {
2951                 DECLARE_MAC_BUF(mac);
2952
2953                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2954                                print_mac(mac, hdr->addr1));
2955                 goto drop;
2956         }
2957
2958         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2959
2960         qc = ieee80211_get_qos_ctrl(hdr);
2961         if (qc) {
2962                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2963                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2964                                 IEEE80211_SCTL_SEQ;
2965                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2966                         (hdr->seq_ctrl &
2967                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2968                 seq_number += 0x10;
2969 #ifdef CONFIG_IWL4965_HT
2970 #ifdef CONFIG_IWL4965_HT_AGG
2971                 /* aggregation is on for this <sta,tid> */
2972                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2973                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2974 #endif /* CONFIG_IWL4965_HT_AGG */
2975 #endif /* CONFIG_IWL4965_HT */
2976         }
2977
2978         /* Descriptor for chosen Tx queue */
2979         txq = &priv->txq[txq_id];
2980         q = &txq->q;
2981
2982         spin_lock_irqsave(&priv->lock, flags);
2983
2984         /* Set up first empty TFD within this queue's circular TFD buffer */
2985         tfd = &txq->bd[q->write_ptr];
2986         memset(tfd, 0, sizeof(*tfd));
2987         control_flags = (u32 *) tfd;
2988         idx = get_cmd_index(q, q->write_ptr, 0);
2989
2990         /* Set up driver data for this TFD */
2991         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2992         txq->txb[q->write_ptr].skb[0] = skb;
2993         memcpy(&(txq->txb[q->write_ptr].status.control),
2994                ctl, sizeof(struct ieee80211_tx_control));
2995
2996         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2997         out_cmd = &txq->cmd[idx];
2998         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2999         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
3000
3001         /*
3002          * Set up the Tx-command (not MAC!) header.
3003          * Store the chosen Tx queue and TFD index within the sequence field;
3004          * after Tx, uCode's Tx response will return this value so driver can
3005          * locate the frame within the tx queue and do post-tx processing.
3006          */
3007         out_cmd->hdr.cmd = REPLY_TX;
3008         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
3009                                 INDEX_TO_SEQ(q->write_ptr)));
3010
3011         /* Copy MAC header from skb into command buffer */
3012         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
3013
3014         /*
3015          * Use the first empty entry in this queue's command buffer array
3016          * to contain the Tx command and MAC header concatenated together
3017          * (payload data will be in another buffer).
3018          * Size of this varies, due to varying MAC header length.
3019          * If end is not dword aligned, we'll have 2 extra bytes at the end
3020          * of the MAC header (device reads on dword boundaries).
3021          * We'll tell device about this padding later.
3022          */
3023         len = priv->hw_setting.tx_cmd_len +
3024                 sizeof(struct iwl4965_cmd_header) + hdr_len;
3025
3026         len_org = len;
3027         len = (len + 3) & ~3;
3028
3029         if (len_org != len)
3030                 len_org = 1;
3031         else
3032                 len_org = 0;
3033
3034         /* Physical address of this Tx command's header (not MAC header!),
3035          * within command buffer array. */
3036         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
3037                      offsetof(struct iwl4965_cmd, hdr);
3038
3039         /* Add buffer containing Tx command and MAC(!) header to TFD's
3040          * first entry */
3041         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
3042
3043         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
3044                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
3045
3046         /* Set up TFD's 2nd entry to point directly to remainder of skb,
3047          * if any (802.11 null frames have no payload). */
3048         len = skb->len - hdr_len;
3049         if (len) {
3050                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
3051                                            len, PCI_DMA_TODEVICE);
3052                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
3053         }
3054
3055         /* Tell 4965 about any 2-byte padding after MAC header */
3056         if (len_org)
3057                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
3058
3059         /* Total # bytes to be transmitted */
3060         len = (u16)skb->len;
3061         out_cmd->cmd.tx.len = cpu_to_le16(len);
3062
3063         /* TODO need this for burst mode later on */
3064         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
3065
3066         /* set is_hcca to 0; it probably will never be implemented */
3067         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
3068
3069         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3070                 offsetof(struct iwl4965_tx_cmd, scratch);
3071         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
3072         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
3073
3074 #ifdef CONFIG_IWL4965_HT_AGG
3075 #ifdef CONFIG_IWL4965_HT
3076         /* TODO: move this functionality to rate scaling */
3077         iwl4965_tl_get_stats(priv, hdr);
3078 #endif /* CONFIG_IWL4965_HT_AGG */
3079 #endif /*CONFIG_IWL4965_HT */
3080
3081
3082         if (!ieee80211_get_morefrag(hdr)) {
3083                 txq->need_update = 1;
3084                 if (qc) {
3085                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
3086                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
3087                 }
3088         } else {
3089                 wait_write_ptr = 1;
3090                 txq->need_update = 0;
3091         }
3092
3093         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
3094                            sizeof(out_cmd->cmd.tx));
3095
3096         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
3097                            ieee80211_get_hdrlen(fc));
3098
3099         /* Set up entry for this TFD in Tx byte-count array */
3100         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
3101
3102         /* Tell device the write index *just past* this latest filled TFD */
3103         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
3104         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
3105         spin_unlock_irqrestore(&priv->lock, flags);
3106
3107         if (rc)
3108                 return rc;
3109
3110         if ((iwl4965_queue_space(q) < q->high_mark)
3111             && priv->mac80211_registered) {
3112                 if (wait_write_ptr) {
3113                         spin_lock_irqsave(&priv->lock, flags);
3114                         txq->need_update = 1;
3115                         iwl4965_tx_queue_update_write_ptr(priv, txq);
3116                         spin_unlock_irqrestore(&priv->lock, flags);
3117                 }
3118
3119                 ieee80211_stop_queue(priv->hw, ctl->queue);
3120         }
3121
3122         return 0;
3123
3124 drop_unlock:
3125         spin_unlock_irqrestore(&priv->lock, flags);
3126 drop:
3127         return -1;
3128 }
3129
3130 static void iwl4965_set_rate(struct iwl4965_priv *priv)
3131 {
3132         const struct ieee80211_hw_mode *hw = NULL;
3133         struct ieee80211_rate *rate;
3134         int i;
3135
3136         hw = iwl4965_get_hw_mode(priv, priv->phymode);
3137         if (!hw) {
3138                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3139                 return;
3140         }
3141
3142         priv->active_rate = 0;
3143         priv->active_rate_basic = 0;
3144
3145         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3146                        hw->mode == MODE_IEEE80211A ?
3147                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3148
3149         for (i = 0; i < hw->num_rates; i++) {
3150                 rate = &(hw->rates[i]);
3151                 if ((rate->val < IWL_RATE_COUNT) &&
3152                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3153                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3154                                        rate->val, iwl4965_rates[rate->val].plcp,
3155                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3156                                        "*" : "");
3157                         priv->active_rate |= (1 << rate->val);
3158                         if (rate->flags & IEEE80211_RATE_BASIC)
3159                                 priv->active_rate_basic |= (1 << rate->val);
3160                 } else
3161                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3162                                        rate->val, iwl4965_rates[rate->val].plcp);
3163         }
3164
3165         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3166                        priv->active_rate, priv->active_rate_basic);
3167
3168         /*
3169          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3170          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3171          * OFDM
3172          */
3173         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3174                 priv->staging_rxon.cck_basic_rates =
3175                     ((priv->active_rate_basic &
3176                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3177         else
3178                 priv->staging_rxon.cck_basic_rates =
3179                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3180
3181         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3182                 priv->staging_rxon.ofdm_basic_rates =
3183                     ((priv->active_rate_basic &
3184                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3185                       IWL_FIRST_OFDM_RATE) & 0xFF;
3186         else
3187                 priv->staging_rxon.ofdm_basic_rates =
3188                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3189 }
3190
3191 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
3192 {
3193         unsigned long flags;
3194
3195         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3196                 return;
3197
3198         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3199                           disable_radio ? "OFF" : "ON");
3200
3201         if (disable_radio) {
3202                 iwl4965_scan_cancel(priv);
3203                 /* FIXME: This is a workaround for AP */
3204                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3205                         spin_lock_irqsave(&priv->lock, flags);
3206                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3207                                     CSR_UCODE_SW_BIT_RFKILL);
3208                         spin_unlock_irqrestore(&priv->lock, flags);
3209                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3210                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3211                 }
3212                 return;
3213         }
3214
3215         spin_lock_irqsave(&priv->lock, flags);
3216         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3217
3218         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3219         spin_unlock_irqrestore(&priv->lock, flags);
3220
3221         /* wake up ucode */
3222         msleep(10);
3223
3224         spin_lock_irqsave(&priv->lock, flags);
3225         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3226         if (!iwl4965_grab_nic_access(priv))
3227                 iwl4965_release_nic_access(priv);
3228         spin_unlock_irqrestore(&priv->lock, flags);
3229
3230         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3231                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3232                                   "disabled by HW switch\n");
3233                 return;
3234         }
3235
3236         queue_work(priv->workqueue, &priv->restart);
3237         return;
3238 }
3239
3240 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
3241                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3242 {
3243         u16 fc =
3244             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3245
3246         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3247                 return;
3248
3249         if (!(fc & IEEE80211_FCTL_PROTECTED))
3250                 return;
3251
3252         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3253         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3254         case RX_RES_STATUS_SEC_TYPE_TKIP:
3255                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3256                     RX_RES_STATUS_BAD_ICV_MIC)
3257                         stats->flag |= RX_FLAG_MMIC_ERROR;
3258         case RX_RES_STATUS_SEC_TYPE_WEP:
3259         case RX_RES_STATUS_SEC_TYPE_CCMP:
3260                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3261                     RX_RES_STATUS_DECRYPT_OK) {
3262                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3263                         stats->flag |= RX_FLAG_DECRYPTED;
3264                 }
3265                 break;
3266
3267         default:
3268                 break;
3269         }
3270 }
3271
3272
3273 #define IWL_PACKET_RETRY_TIME HZ
3274
3275 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
3276 {
3277         u16 sc = le16_to_cpu(header->seq_ctrl);
3278         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3279         u16 frag = sc & IEEE80211_SCTL_FRAG;
3280         u16 *last_seq, *last_frag;
3281         unsigned long *last_time;
3282
3283         switch (priv->iw_mode) {
3284         case IEEE80211_IF_TYPE_IBSS:{
3285                 struct list_head *p;
3286                 struct iwl4965_ibss_seq *entry = NULL;
3287                 u8 *mac = header->addr2;
3288                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3289
3290                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3291                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
3292                         if (!compare_ether_addr(entry->mac, mac))
3293                                 break;
3294                 }
3295                 if (p == &priv->ibss_mac_hash[index]) {
3296                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3297                         if (!entry) {
3298                                 IWL_ERROR("Cannot malloc new mac entry\n");
3299                                 return 0;
3300                         }
3301                         memcpy(entry->mac, mac, ETH_ALEN);
3302                         entry->seq_num = seq;
3303                         entry->frag_num = frag;
3304                         entry->packet_time = jiffies;
3305                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3306                         return 0;
3307                 }
3308                 last_seq = &entry->seq_num;
3309                 last_frag = &entry->frag_num;
3310                 last_time = &entry->packet_time;
3311                 break;
3312         }
3313         case IEEE80211_IF_TYPE_STA:
3314                 last_seq = &priv->last_seq_num;
3315                 last_frag = &priv->last_frag_num;
3316                 last_time = &priv->last_packet_time;
3317                 break;
3318         default:
3319                 return 0;
3320         }
3321         if ((*last_seq == seq) &&
3322             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3323                 if (*last_frag == frag)
3324                         goto drop;
3325                 if (*last_frag + 1 != frag)
3326                         /* out-of-order fragment */
3327                         goto drop;
3328         } else
3329                 *last_seq = seq;
3330
3331         *last_frag = frag;
3332         *last_time = jiffies;
3333         return 0;
3334
3335  drop:
3336         return 1;
3337 }
3338
3339 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3340
3341 #include "iwl-spectrum.h"
3342
3343 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3344 #define BEACON_TIME_MASK_HIGH   0xFF000000
3345 #define TIME_UNIT               1024
3346
3347 /*
3348  * extended beacon time format
3349  * time in usec will be changed into a 32-bit value in 8:24 format
3350  * the high 1 byte is the beacon counts
3351  * the lower 3 bytes is the time in usec within one beacon interval
3352  */
3353
3354 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3355 {
3356         u32 quot;
3357         u32 rem;
3358         u32 interval = beacon_interval * 1024;
3359
3360         if (!interval || !usec)
3361                 return 0;
3362
3363         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3364         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3365
3366         return (quot << 24) + rem;
3367 }
3368
3369 /* base is usually what we get from ucode with each received frame,
3370  * the same as HW timer counter counting down
3371  */
3372
3373 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3374 {
3375         u32 base_low = base & BEACON_TIME_MASK_LOW;
3376         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3377         u32 interval = beacon_interval * TIME_UNIT;
3378         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3379             (addon & BEACON_TIME_MASK_HIGH);
3380
3381         if (base_low > addon_low)
3382                 res += base_low - addon_low;
3383         else if (base_low < addon_low) {
3384                 res += interval + base_low - addon_low;
3385                 res += (1 << 24);
3386         } else
3387                 res += (1 << 24);
3388
3389         return cpu_to_le32(res);
3390 }
3391
3392 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3393                                struct ieee80211_measurement_params *params,
3394                                u8 type)
3395 {
3396         struct iwl4965_spectrum_cmd spectrum;
3397         struct iwl4965_rx_packet *res;
3398         struct iwl4965_host_cmd cmd = {
3399                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3400                 .data = (void *)&spectrum,
3401                 .meta.flags = CMD_WANT_SKB,
3402         };
3403         u32 add_time = le64_to_cpu(params->start_time);
3404         int rc;
3405         int spectrum_resp_status;
3406         int duration = le16_to_cpu(params->duration);
3407
3408         if (iwl4965_is_associated(priv))
3409                 add_time =
3410                     iwl4965_usecs_to_beacons(
3411                         le64_to_cpu(params->start_time) - priv->last_tsf,
3412                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3413
3414         memset(&spectrum, 0, sizeof(spectrum));
3415
3416         spectrum.channel_count = cpu_to_le16(1);
3417         spectrum.flags =
3418             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3419         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3420         cmd.len = sizeof(spectrum);
3421         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3422
3423         if (iwl4965_is_associated(priv))
3424                 spectrum.start_time =
3425                     iwl4965_add_beacon_time(priv->last_beacon_time,
3426                                 add_time,
3427                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3428         else
3429                 spectrum.start_time = 0;
3430
3431         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3432         spectrum.channels[0].channel = params->channel;
3433         spectrum.channels[0].type = type;
3434         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3435                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3436                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3437
3438         rc = iwl4965_send_cmd_sync(priv, &cmd);
3439         if (rc)
3440                 return rc;
3441
3442         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3443         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3444                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3445                 rc = -EIO;
3446         }
3447
3448         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3449         switch (spectrum_resp_status) {
3450         case 0:         /* Command will be handled */
3451                 if (res->u.spectrum.id != 0xff) {
3452                         IWL_DEBUG_INFO
3453                             ("Replaced existing measurement: %d\n",
3454                              res->u.spectrum.id);
3455                         priv->measurement_status &= ~MEASUREMENT_READY;
3456                 }
3457                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3458                 rc = 0;
3459                 break;
3460
3461         case 1:         /* Command will not be handled */
3462                 rc = -EAGAIN;
3463                 break;
3464         }
3465
3466         dev_kfree_skb_any(cmd.meta.u.skb);
3467
3468         return rc;
3469 }
3470 #endif
3471
3472 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3473                                  struct iwl4965_tx_info *tx_sta)
3474 {
3475
3476         tx_sta->status.ack_signal = 0;
3477         tx_sta->status.excessive_retries = 0;
3478         tx_sta->status.queue_length = 0;
3479         tx_sta->status.queue_number = 0;
3480
3481         if (in_interrupt())
3482                 ieee80211_tx_status_irqsafe(priv->hw,
3483                                             tx_sta->skb[0], &(tx_sta->status));
3484         else
3485                 ieee80211_tx_status(priv->hw,
3486                                     tx_sta->skb[0], &(tx_sta->status));
3487
3488         tx_sta->skb[0] = NULL;
3489 }
3490
3491 /**
3492  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3493  *
3494  * When FW advances 'R' index, all entries between old and new 'R' index
3495  * need to be reclaimed. As result, some free space forms.  If there is
3496  * enough free space (> low mark), wake the stack that feeds us.
3497  */
3498 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3499 {
3500         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3501         struct iwl4965_queue *q = &txq->q;
3502         int nfreed = 0;
3503
3504         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3505                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3506                           "is out of range [0-%d] %d %d.\n", txq_id,
3507                           index, q->n_bd, q->write_ptr, q->read_ptr);
3508                 return 0;
3509         }
3510
3511         for (index = iwl4965_queue_inc_wrap(index, q->n_bd);
3512                 q->read_ptr != index;
3513                 q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3514                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3515                         iwl4965_txstatus_to_ieee(priv,
3516                                         &(txq->txb[txq->q.read_ptr]));
3517                         iwl4965_hw_txq_free_tfd(priv, txq);
3518                 } else if (nfreed > 1) {
3519                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3520                                         q->write_ptr, q->read_ptr);
3521                         queue_work(priv->workqueue, &priv->restart);
3522                 }
3523                 nfreed++;
3524         }
3525
3526         if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3527                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3528                         priv->mac80211_registered)
3529                 ieee80211_wake_queue(priv->hw, txq_id);
3530
3531
3532         return nfreed;
3533 }
3534
3535 static int iwl4965_is_tx_success(u32 status)
3536 {
3537         status &= TX_STATUS_MSK;
3538         return (status == TX_STATUS_SUCCESS)
3539             || (status == TX_STATUS_DIRECT_DONE);
3540 }
3541
3542 /******************************************************************************
3543  *
3544  * Generic RX handler implementations
3545  *
3546  ******************************************************************************/
3547 #ifdef CONFIG_IWL4965_HT
3548 #ifdef CONFIG_IWL4965_HT_AGG
3549
3550 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3551                                     struct ieee80211_hdr *hdr)
3552 {
3553         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3554                 return IWL_AP_ID;
3555         else {
3556                 u8 *da = ieee80211_get_DA(hdr);
3557                 return iwl4965_hw_find_station(priv, da);
3558         }
3559 }
3560
3561 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3562         struct iwl4965_priv *priv, int txq_id, int idx)
3563 {
3564         if (priv->txq[txq_id].txb[idx].skb[0])
3565                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3566                                 txb[idx].skb[0]->data;
3567         return NULL;
3568 }
3569
3570 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3571 {
3572         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3573                                 tx_resp->frame_count);
3574         return le32_to_cpu(*scd_ssn) & MAX_SN;
3575
3576 }
3577
3578 /**
3579  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3580  */
3581 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3582                                       struct iwl4965_ht_agg *agg,
3583                                       struct iwl4965_tx_resp *tx_resp,
3584                                       u16 start_idx)
3585 {
3586         u32 status;
3587         __le32 *frame_status = &tx_resp->status;
3588         struct ieee80211_tx_status *tx_status = NULL;
3589         struct ieee80211_hdr *hdr = NULL;
3590         int i, sh;
3591         int txq_id, idx;
3592         u16 seq;
3593
3594         if (agg->wait_for_ba)
3595                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3596
3597         agg->frame_count = tx_resp->frame_count;
3598         agg->start_idx = start_idx;
3599         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3600         agg->bitmap0 = agg->bitmap1 = 0;
3601
3602         /* # frames attempted by Tx command */
3603         if (agg->frame_count == 1) {
3604                 /* Only one frame was attempted; no block-ack will arrive */
3605                 struct iwl4965_tx_queue *txq ;
3606                 status = le32_to_cpu(frame_status[0]);
3607
3608                 txq_id = agg->txq_id;
3609                 txq = &priv->txq[txq_id];
3610                 /* FIXME: code repetition */
3611                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3612                                    agg->frame_count, agg->start_idx);
3613
3614                 tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
3615                 tx_status->retry_count = tx_resp->failure_frame;
3616                 tx_status->queue_number = status & 0xff;
3617                 tx_status->queue_length = tx_resp->bt_kill_count;
3618                 tx_status->queue_length |= tx_resp->failure_rts;
3619
3620                 tx_status->flags = iwl4965_is_tx_success(status)?
3621                         IEEE80211_TX_STATUS_ACK : 0;
3622                 tx_status->control.tx_rate =
3623                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3624                 /* FIXME: code repetition end */
3625
3626                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3627                                     status & 0xff, tx_resp->failure_frame);
3628                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3629                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3630
3631                 agg->wait_for_ba = 0;
3632         } else {
3633                 /* Two or more frames were attempted; expect block-ack */
3634                 u64 bitmap = 0;
3635                 int start = agg->start_idx;
3636
3637                 /* Construct bit-map of pending frames within Tx window */
3638                 for (i = 0; i < agg->frame_count; i++) {
3639                         u16 sc;
3640                         status = le32_to_cpu(frame_status[i]);
3641                         seq  = status >> 16;
3642                         idx = SEQ_TO_INDEX(seq);
3643                         txq_id = SEQ_TO_QUEUE(seq);
3644
3645                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3646                                       AGG_TX_STATE_ABORT_MSK))
3647                                 continue;
3648
3649                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3650                                            agg->frame_count, txq_id, idx);
3651
3652                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3653
3654                         sc = le16_to_cpu(hdr->seq_ctrl);
3655                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3656                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3657                                           " idx=%d, seq_idx=%d, seq=%d\n",
3658                                           idx, SEQ_TO_SN(sc),
3659                                           hdr->seq_ctrl);
3660                                 return -1;
3661                         }
3662
3663                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3664                                            i, idx, SEQ_TO_SN(sc));
3665
3666                         sh = idx - start;
3667                         if (sh > 64) {
3668                                 sh = (start - idx) + 0xff;
3669                                 bitmap = bitmap << sh;
3670                                 sh = 0;
3671                                 start = idx;
3672                         } else if (sh < -64)
3673                                 sh  = 0xff - (start - idx);
3674                         else if (sh < 0) {
3675                                 sh = start - idx;
3676                                 start = idx;
3677                                 bitmap = bitmap << sh;
3678                                 sh = 0;
3679                         }
3680                         bitmap |= (1 << sh);
3681                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3682                                            start, (u32)(bitmap & 0xFFFFFFFF));
3683                 }
3684
3685                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3686                 agg->bitmap1 = bitmap >> 32;
3687                 agg->start_idx = start;
3688                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3689                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3690                                    agg->frame_count, agg->start_idx,
3691                                    agg->bitmap0);
3692
3693                 if (bitmap)
3694                         agg->wait_for_ba = 1;
3695         }
3696         return 0;
3697 }
3698 #endif
3699 #endif
3700
3701 /**
3702  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3703  */
3704 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3705                             struct iwl4965_rx_mem_buffer *rxb)
3706 {
3707         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3708         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3709         int txq_id = SEQ_TO_QUEUE(sequence);
3710         int index = SEQ_TO_INDEX(sequence);
3711         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3712         struct ieee80211_tx_status *tx_status;
3713         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3714         u32  status = le32_to_cpu(tx_resp->status);
3715 #ifdef CONFIG_IWL4965_HT
3716 #ifdef CONFIG_IWL4965_HT_AGG
3717         int tid, sta_id;
3718 #endif
3719 #endif
3720
3721         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3722                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3723                           "is out of range [0-%d] %d %d\n", txq_id,
3724                           index, txq->q.n_bd, txq->q.write_ptr,
3725                           txq->q.read_ptr);
3726                 return;
3727         }
3728
3729 #ifdef CONFIG_IWL4965_HT
3730 #ifdef CONFIG_IWL4965_HT_AGG
3731         if (txq->sched_retry) {
3732                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3733                 struct ieee80211_hdr *hdr =
3734                         iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3735                 struct iwl4965_ht_agg *agg = NULL;
3736                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3737
3738                 if (qc == NULL) {
3739                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3740                         return;
3741                 }
3742
3743                 tid = le16_to_cpu(*qc) & 0xf;
3744
3745                 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3746                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3747                         IWL_ERROR("Station not known for\n");
3748                         return;
3749                 }
3750
3751                 agg = &priv->stations[sta_id].tid[tid].agg;
3752
3753                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3754
3755                 if ((tx_resp->frame_count == 1) &&
3756                     !iwl4965_is_tx_success(status)) {
3757                         /* TODO: send BAR */
3758                 }
3759
3760                 if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
3761                         index = iwl4965_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3762                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3763                                            "%d index %d\n", scd_ssn , index);
3764                         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3765                 }
3766         } else {
3767 #endif /* CONFIG_IWL4965_HT_AGG */
3768 #endif /* CONFIG_IWL4965_HT */
3769         tx_status = &(txq->txb[txq->q.read_ptr].status);
3770
3771         tx_status->retry_count = tx_resp->failure_frame;
3772         tx_status->queue_number = status;
3773         tx_status->queue_length = tx_resp->bt_kill_count;
3774         tx_status->queue_length |= tx_resp->failure_rts;
3775
3776         tx_status->flags =
3777             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3778
3779         tx_status->control.tx_rate =
3780                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3781
3782         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3783                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3784                      status, le32_to_cpu(tx_resp->rate_n_flags),
3785                      tx_resp->failure_frame);
3786
3787         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3788         if (index != -1)
3789                 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3790 #ifdef CONFIG_IWL4965_HT
3791 #ifdef CONFIG_IWL4965_HT_AGG
3792         }
3793 #endif /* CONFIG_IWL4965_HT_AGG */
3794 #endif /* CONFIG_IWL4965_HT */
3795
3796         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3797                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3798 }
3799
3800
3801 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3802                                struct iwl4965_rx_mem_buffer *rxb)
3803 {
3804         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3805         struct iwl4965_alive_resp *palive;
3806         struct delayed_work *pwork;
3807
3808         palive = &pkt->u.alive_frame;
3809
3810         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3811                        "0x%01X 0x%01X\n",
3812                        palive->is_valid, palive->ver_type,
3813                        palive->ver_subtype);
3814
3815         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3816                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3817                 memcpy(&priv->card_alive_init,
3818                        &pkt->u.alive_frame,
3819                        sizeof(struct iwl4965_init_alive_resp));
3820                 pwork = &priv->init_alive_start;
3821         } else {
3822                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3823                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3824                        sizeof(struct iwl4965_alive_resp));
3825                 pwork = &priv->alive_start;
3826         }
3827
3828         /* We delay the ALIVE response by 5ms to
3829          * give the HW RF Kill time to activate... */
3830         if (palive->is_valid == UCODE_VALID_OK)
3831                 queue_delayed_work(priv->workqueue, pwork,
3832                                    msecs_to_jiffies(5));
3833         else
3834                 IWL_WARNING("uCode did not respond OK.\n");
3835 }
3836
3837 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3838                                  struct iwl4965_rx_mem_buffer *rxb)
3839 {
3840         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3841
3842         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3843         return;
3844 }
3845
3846 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3847                                struct iwl4965_rx_mem_buffer *rxb)
3848 {
3849         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3850
3851         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3852                 "seq 0x%04X ser 0x%08X\n",
3853                 le32_to_cpu(pkt->u.err_resp.error_type),
3854                 get_cmd_string(pkt->u.err_resp.cmd_id),
3855                 pkt->u.err_resp.cmd_id,
3856                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3857                 le32_to_cpu(pkt->u.err_resp.error_info));
3858 }
3859
3860 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3861
3862 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3863 {
3864         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3865         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3866         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3867         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3868                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3869         rxon->channel = csa->channel;
3870         priv->staging_rxon.channel = csa->channel;
3871 }
3872
3873 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3874                                           struct iwl4965_rx_mem_buffer *rxb)
3875 {
3876 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3877         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3878         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3879
3880         if (!report->state) {
3881                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3882                           "Spectrum Measure Notification: Start\n");
3883                 return;
3884         }
3885
3886         memcpy(&priv->measure_report, report, sizeof(*report));
3887         priv->measurement_status |= MEASUREMENT_READY;
3888 #endif
3889 }
3890
3891 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3892                                   struct iwl4965_rx_mem_buffer *rxb)
3893 {
3894 #ifdef CONFIG_IWL4965_DEBUG
3895         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3896         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3897         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3898                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3899 #endif
3900 }
3901
3902 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3903                                              struct iwl4965_rx_mem_buffer *rxb)
3904 {
3905         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3906         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3907                         "notification for %s:\n",
3908                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3909         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3910 }
3911
3912 static void iwl4965_bg_beacon_update(struct work_struct *work)
3913 {
3914         struct iwl4965_priv *priv =
3915                 container_of(work, struct iwl4965_priv, beacon_update);
3916         struct sk_buff *beacon;
3917
3918         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3919         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3920
3921         if (!beacon) {
3922                 IWL_ERROR("update beacon failed\n");
3923                 return;
3924         }
3925
3926         mutex_lock(&priv->mutex);
3927         /* new beacon skb is allocated every time; dispose previous.*/
3928         if (priv->ibss_beacon)
3929                 dev_kfree_skb(priv->ibss_beacon);
3930
3931         priv->ibss_beacon = beacon;
3932         mutex_unlock(&priv->mutex);
3933
3934         iwl4965_send_beacon_cmd(priv);
3935 }
3936
3937 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3938                                 struct iwl4965_rx_mem_buffer *rxb)
3939 {
3940 #ifdef CONFIG_IWL4965_DEBUG
3941         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3942         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3943         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3944
3945         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3946                 "tsf %d %d rate %d\n",
3947                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3948                 beacon->beacon_notify_hdr.failure_frame,
3949                 le32_to_cpu(beacon->ibss_mgr_status),
3950                 le32_to_cpu(beacon->high_tsf),
3951                 le32_to_cpu(beacon->low_tsf), rate);
3952 #endif
3953
3954         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3955             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3956                 queue_work(priv->workqueue, &priv->beacon_update);
3957 }
3958
3959 /* Service response to REPLY_SCAN_CMD (0x80) */
3960 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3961                               struct iwl4965_rx_mem_buffer *rxb)
3962 {
3963 #ifdef CONFIG_IWL4965_DEBUG
3964         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3965         struct iwl4965_scanreq_notification *notif =
3966             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3967
3968         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3969 #endif
3970 }
3971
3972 /* Service SCAN_START_NOTIFICATION (0x82) */
3973 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3974                                     struct iwl4965_rx_mem_buffer *rxb)
3975 {
3976         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3977         struct iwl4965_scanstart_notification *notif =
3978             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3979         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3980         IWL_DEBUG_SCAN("Scan start: "
3981                        "%d [802.11%s] "
3982                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3983                        notif->channel,
3984                        notif->band ? "bg" : "a",
3985                        notif->tsf_high,
3986                        notif->tsf_low, notif->status, notif->beacon_timer);
3987 }
3988
3989 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3990 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3991                                       struct iwl4965_rx_mem_buffer *rxb)
3992 {
3993         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3994         struct iwl4965_scanresults_notification *notif =
3995             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3996
3997         IWL_DEBUG_SCAN("Scan ch.res: "
3998                        "%d [802.11%s] "
3999                        "(TSF: 0x%08X:%08X) - %d "
4000                        "elapsed=%lu usec (%dms since last)\n",
4001                        notif->channel,
4002                        notif->band ? "bg" : "a",
4003                        le32_to_cpu(notif->tsf_high),
4004                        le32_to_cpu(notif->tsf_low),
4005                        le32_to_cpu(notif->statistics[0]),
4006                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
4007                        jiffies_to_msecs(elapsed_jiffies
4008                                         (priv->last_scan_jiffies, jiffies)));
4009
4010         priv->last_scan_jiffies = jiffies;
4011         priv->next_scan_jiffies = 0;
4012 }
4013
4014 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
4015 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
4016                                        struct iwl4965_rx_mem_buffer *rxb)
4017 {
4018         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4019         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
4020
4021         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
4022                        scan_notif->scanned_channels,
4023                        scan_notif->tsf_low,
4024                        scan_notif->tsf_high, scan_notif->status);
4025
4026         /* The HW is no longer scanning */
4027         clear_bit(STATUS_SCAN_HW, &priv->status);
4028
4029         /* The scan completion notification came in, so kill that timer... */
4030         cancel_delayed_work(&priv->scan_check);
4031
4032         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
4033                        (priv->scan_bands == 2) ? "2.4" : "5.2",
4034                        jiffies_to_msecs(elapsed_jiffies
4035                                         (priv->scan_pass_start, jiffies)));
4036
4037         /* Remove this scanned band from the list
4038          * of pending bands to scan */
4039         priv->scan_bands--;
4040
4041         /* If a request to abort was given, or the scan did not succeed
4042          * then we reset the scan state machine and terminate,
4043          * re-queuing another scan if one has been requested */
4044         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4045                 IWL_DEBUG_INFO("Aborted scan completed.\n");
4046                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
4047         } else {
4048                 /* If there are more bands on this scan pass reschedule */
4049                 if (priv->scan_bands > 0)
4050                         goto reschedule;
4051         }
4052
4053         priv->last_scan_jiffies = jiffies;
4054         priv->next_scan_jiffies = 0;
4055         IWL_DEBUG_INFO("Setting scan to off\n");
4056
4057         clear_bit(STATUS_SCANNING, &priv->status);
4058
4059         IWL_DEBUG_INFO("Scan took %dms\n",
4060                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4061
4062         queue_work(priv->workqueue, &priv->scan_completed);
4063
4064         return;
4065
4066 reschedule:
4067         priv->scan_pass_start = jiffies;
4068         queue_work(priv->workqueue, &priv->request_scan);
4069 }
4070
4071 /* Handle notification from uCode that card's power state is changing
4072  * due to software, hardware, or critical temperature RFKILL */
4073 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
4074                                     struct iwl4965_rx_mem_buffer *rxb)
4075 {
4076         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4077         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4078         unsigned long status = priv->status;
4079
4080         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4081                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4082                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4083
4084         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4085                      RF_CARD_DISABLED)) {
4086
4087                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4088                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4089
4090                 if (!iwl4965_grab_nic_access(priv)) {
4091                         iwl4965_write_direct32(
4092                                 priv, HBUS_TARG_MBX_C,
4093                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4094
4095                         iwl4965_release_nic_access(priv);
4096                 }
4097
4098                 if (!(flags & RXON_CARD_DISABLED)) {
4099                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4100                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4101                         if (!iwl4965_grab_nic_access(priv)) {
4102                                 iwl4965_write_direct32(
4103                                         priv, HBUS_TARG_MBX_C,
4104                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4105
4106                                 iwl4965_release_nic_access(priv);
4107                         }
4108                 }
4109
4110                 if (flags & RF_CARD_DISABLED) {
4111                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4112                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4113                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4114                         if (!iwl4965_grab_nic_access(priv))
4115                                 iwl4965_release_nic_access(priv);
4116                 }
4117         }
4118
4119         if (flags & HW_CARD_DISABLED)
4120                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4121         else
4122                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4123
4124
4125         if (flags & SW_CARD_DISABLED)
4126                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4127         else
4128                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4129
4130         if (!(flags & RXON_CARD_DISABLED))
4131                 iwl4965_scan_cancel(priv);
4132
4133         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4134              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4135             (test_bit(STATUS_RF_KILL_SW, &status) !=
4136              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4137                 queue_work(priv->workqueue, &priv->rf_kill);
4138         else
4139                 wake_up_interruptible(&priv->wait_command_queue);
4140 }
4141
4142 /**
4143  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
4144  *
4145  * Setup the RX handlers for each of the reply types sent from the uCode
4146  * to the host.
4147  *
4148  * This function chains into the hardware specific files for them to setup
4149  * any hardware specific handlers as well.
4150  */
4151 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
4152 {
4153         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
4154         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
4155         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
4156         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
4157         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4158             iwl4965_rx_spectrum_measure_notif;
4159         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
4160         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4161             iwl4965_rx_pm_debug_statistics_notif;
4162         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
4163
4164         /*
4165          * The same handler is used for both the REPLY to a discrete
4166          * statistics request from the host as well as for the periodic
4167          * statistics notifications (after received beacons) from the uCode.
4168          */
4169         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
4170         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
4171
4172         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
4173         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
4174         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4175             iwl4965_rx_scan_results_notif;
4176         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4177             iwl4965_rx_scan_complete_notif;
4178         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
4179         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
4180
4181         /* Set up hardware specific Rx handlers */
4182         iwl4965_hw_rx_handler_setup(priv);
4183 }
4184
4185 /**
4186  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4187  * @rxb: Rx buffer to reclaim
4188  *
4189  * If an Rx buffer has an async callback associated with it the callback
4190  * will be executed.  The attached skb (if present) will only be freed
4191  * if the callback returns 1
4192  */
4193 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
4194                                 struct iwl4965_rx_mem_buffer *rxb)
4195 {
4196         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4197         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4198         int txq_id = SEQ_TO_QUEUE(sequence);
4199         int index = SEQ_TO_INDEX(sequence);
4200         int huge = sequence & SEQ_HUGE_FRAME;
4201         int cmd_index;
4202         struct iwl4965_cmd *cmd;
4203
4204         /* If a Tx command is being handled and it isn't in the actual
4205          * command queue then there a command routing bug has been introduced
4206          * in the queue management code. */
4207         if (txq_id != IWL_CMD_QUEUE_NUM)
4208                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4209                           txq_id, pkt->hdr.cmd);
4210         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4211
4212         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4213         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4214
4215         /* Input error checking is done when commands are added to queue. */
4216         if (cmd->meta.flags & CMD_WANT_SKB) {
4217                 cmd->meta.source->u.skb = rxb->skb;
4218                 rxb->skb = NULL;
4219         } else if (cmd->meta.u.callback &&
4220                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4221                 rxb->skb = NULL;
4222
4223         iwl4965_tx_queue_reclaim(priv, txq_id, index);
4224
4225         if (!(cmd->meta.flags & CMD_ASYNC)) {
4226                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4227                 wake_up_interruptible(&priv->wait_command_queue);
4228         }
4229 }
4230
4231 /************************** RX-FUNCTIONS ****************************/
4232 /*
4233  * Rx theory of operation
4234  *
4235  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
4236  * each of which point to Receive Buffers to be filled by 4965.  These get
4237  * used not only for Rx frames, but for any command response or notification
4238  * from the 4965.  The driver and 4965 manage the Rx buffers by means
4239  * of indexes into the circular buffer.
4240  *
4241  * Rx Queue Indexes
4242  * The host/firmware share two index registers for managing the Rx buffers.
4243  *
4244  * The READ index maps to the first position that the firmware may be writing
4245  * to -- the driver can read up to (but not including) this position and get
4246  * good data.
4247  * The READ index is managed by the firmware once the card is enabled.
4248  *
4249  * The WRITE index maps to the last position the driver has read from -- the
4250  * position preceding WRITE is the last slot the firmware can place a packet.
4251  *
4252  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4253  * WRITE = READ.
4254  *
4255  * During initialization, the host sets up the READ queue position to the first
4256  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4257  *
4258  * When the firmware places a packet in a buffer, it will advance the READ index
4259  * and fire the RX interrupt.  The driver can then query the READ index and
4260  * process as many packets as possible, moving the WRITE index forward as it
4261  * resets the Rx queue buffers with new memory.
4262  *
4263  * The management in the driver is as follows:
4264  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4265  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4266  *   to replenish the iwl->rxq->rx_free.
4267  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
4268  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4269  *   'processed' and 'read' driver indexes as well)
4270  * + A received packet is processed and handed to the kernel network stack,
4271  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4272  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4273  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4274  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4275  *   were enough free buffers and RX_STALLED is set it is cleared.
4276  *
4277  *
4278  * Driver sequence:
4279  *
4280  * iwl4965_rx_queue_alloc()   Allocates rx_free
4281  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
4282  *                            iwl4965_rx_queue_restock
4283  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
4284  *                            queue, updates firmware pointers, and updates
4285  *                            the WRITE index.  If insufficient rx_free buffers
4286  *                            are available, schedules iwl4965_rx_replenish
4287  *
4288  * -- enable interrupts --
4289  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
4290  *                            READ INDEX, detaching the SKB from the pool.
4291  *                            Moves the packet buffer from queue to rx_used.
4292  *                            Calls iwl4965_rx_queue_restock to refill any empty
4293  *                            slots.
4294  * ...
4295  *
4296  */
4297
4298 /**
4299  * iwl4965_rx_queue_space - Return number of free slots available in queue.
4300  */
4301 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
4302 {
4303         int s = q->read - q->write;
4304         if (s <= 0)
4305                 s += RX_QUEUE_SIZE;
4306         /* keep some buffer to not confuse full and empty queue */
4307         s -= 2;
4308         if (s < 0)
4309                 s = 0;
4310         return s;
4311 }
4312
4313 /**
4314  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4315  */
4316 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4317 {
4318         u32 reg = 0;
4319         int rc = 0;
4320         unsigned long flags;
4321
4322         spin_lock_irqsave(&q->lock, flags);
4323
4324         if (q->need_update == 0)
4325                 goto exit_unlock;
4326
4327         /* If power-saving is in use, make sure device is awake */
4328         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4329                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4330
4331                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4332                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4333                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4334                         goto exit_unlock;
4335                 }
4336
4337                 rc = iwl4965_grab_nic_access(priv);
4338                 if (rc)
4339                         goto exit_unlock;
4340
4341                 /* Device expects a multiple of 8 */
4342                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4343                                      q->write & ~0x7);
4344                 iwl4965_release_nic_access(priv);
4345
4346         /* Else device is assumed to be awake */
4347         } else
4348                 /* Device expects a multiple of 8 */
4349                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4350
4351
4352         q->need_update = 0;
4353
4354  exit_unlock:
4355         spin_unlock_irqrestore(&q->lock, flags);
4356         return rc;
4357 }
4358
4359 /**
4360  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4361  */
4362 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4363                                           dma_addr_t dma_addr)
4364 {
4365         return cpu_to_le32((u32)(dma_addr >> 8));
4366 }
4367
4368
4369 /**
4370  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4371  *
4372  * If there are slots in the RX queue that need to be restocked,
4373  * and we have free pre-allocated buffers, fill the ranks as much
4374  * as we can, pulling from rx_free.
4375  *
4376  * This moves the 'write' index forward to catch up with 'processed', and
4377  * also updates the memory address in the firmware to reference the new
4378  * target buffer.
4379  */
4380 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4381 {
4382         struct iwl4965_rx_queue *rxq = &priv->rxq;
4383         struct list_head *element;
4384         struct iwl4965_rx_mem_buffer *rxb;
4385         unsigned long flags;
4386         int write, rc;
4387
4388         spin_lock_irqsave(&rxq->lock, flags);
4389         write = rxq->write & ~0x7;
4390         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4391                 /* Get next free Rx buffer, remove from free list */
4392                 element = rxq->rx_free.next;
4393                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4394                 list_del(element);
4395
4396                 /* Point to Rx buffer via next RBD in circular buffer */
4397                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4398                 rxq->queue[rxq->write] = rxb;
4399                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4400                 rxq->free_count--;
4401         }
4402         spin_unlock_irqrestore(&rxq->lock, flags);
4403         /* If the pre-allocated buffer pool is dropping low, schedule to
4404          * refill it */
4405         if (rxq->free_count <= RX_LOW_WATERMARK)
4406                 queue_work(priv->workqueue, &priv->rx_replenish);
4407
4408
4409         /* If we've added more space for the firmware to place data, tell it.
4410          * Increment device's write pointer in multiples of 8. */
4411         if ((write != (rxq->write & ~0x7))
4412             || (abs(rxq->write - rxq->read) > 7)) {
4413                 spin_lock_irqsave(&rxq->lock, flags);
4414                 rxq->need_update = 1;
4415                 spin_unlock_irqrestore(&rxq->lock, flags);
4416                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4417                 if (rc)
4418                         return rc;
4419         }
4420
4421         return 0;
4422 }
4423
4424 /**
4425  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4426  *
4427  * When moving to rx_free an SKB is allocated for the slot.
4428  *
4429  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4430  * This is called as a scheduled work item (except for during initialization)
4431  */
4432 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4433 {
4434         struct iwl4965_rx_queue *rxq = &priv->rxq;
4435         struct list_head *element;
4436         struct iwl4965_rx_mem_buffer *rxb;
4437         unsigned long flags;
4438         spin_lock_irqsave(&rxq->lock, flags);
4439         while (!list_empty(&rxq->rx_used)) {
4440                 element = rxq->rx_used.next;
4441                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4442
4443                 /* Alloc a new receive buffer */
4444                 rxb->skb =
4445                     alloc_skb(priv->hw_setting.rx_buf_size,
4446                                 __GFP_NOWARN | GFP_ATOMIC);
4447                 if (!rxb->skb) {
4448                         if (net_ratelimit())
4449                                 printk(KERN_CRIT DRV_NAME
4450                                        ": Can not allocate SKB buffers\n");
4451                         /* We don't reschedule replenish work here -- we will
4452                          * call the restock method and if it still needs
4453                          * more buffers it will schedule replenish */
4454                         break;
4455                 }
4456                 priv->alloc_rxb_skb++;
4457                 list_del(element);
4458
4459                 /* Get physical address of RB/SKB */
4460                 rxb->dma_addr =
4461                     pci_map_single(priv->pci_dev, rxb->skb->data,
4462                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4463                 list_add_tail(&rxb->list, &rxq->rx_free);
4464                 rxq->free_count++;
4465         }
4466         spin_unlock_irqrestore(&rxq->lock, flags);
4467 }
4468
4469 /*
4470  * this should be called while priv->lock is locked
4471 */
4472 static void __iwl4965_rx_replenish(void *data)
4473 {
4474         struct iwl4965_priv *priv = data;
4475
4476         iwl4965_rx_allocate(priv);
4477         iwl4965_rx_queue_restock(priv);
4478 }
4479
4480
4481 void iwl4965_rx_replenish(void *data)
4482 {
4483         struct iwl4965_priv *priv = data;
4484         unsigned long flags;
4485
4486         iwl4965_rx_allocate(priv);
4487
4488         spin_lock_irqsave(&priv->lock, flags);
4489         iwl4965_rx_queue_restock(priv);
4490         spin_unlock_irqrestore(&priv->lock, flags);
4491 }
4492
4493 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4494  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4495  * This free routine walks the list of POOL entries and if SKB is set to
4496  * non NULL it is unmapped and freed
4497  */
4498 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4499 {
4500         int i;
4501         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4502                 if (rxq->pool[i].skb != NULL) {
4503                         pci_unmap_single(priv->pci_dev,
4504                                          rxq->pool[i].dma_addr,
4505                                          priv->hw_setting.rx_buf_size,
4506                                          PCI_DMA_FROMDEVICE);
4507                         dev_kfree_skb(rxq->pool[i].skb);
4508                 }
4509         }
4510
4511         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4512                             rxq->dma_addr);
4513         rxq->bd = NULL;
4514 }
4515
4516 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4517 {
4518         struct iwl4965_rx_queue *rxq = &priv->rxq;
4519         struct pci_dev *dev = priv->pci_dev;
4520         int i;
4521
4522         spin_lock_init(&rxq->lock);
4523         INIT_LIST_HEAD(&rxq->rx_free);
4524         INIT_LIST_HEAD(&rxq->rx_used);
4525
4526         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4527         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4528         if (!rxq->bd)
4529                 return -ENOMEM;
4530
4531         /* Fill the rx_used queue with _all_ of the Rx buffers */
4532         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4533                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4534
4535         /* Set us so that we have processed and used all buffers, but have
4536          * not restocked the Rx queue with fresh buffers */
4537         rxq->read = rxq->write = 0;
4538         rxq->free_count = 0;
4539         rxq->need_update = 0;
4540         return 0;
4541 }
4542
4543 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4544 {
4545         unsigned long flags;
4546         int i;
4547         spin_lock_irqsave(&rxq->lock, flags);
4548         INIT_LIST_HEAD(&rxq->rx_free);
4549         INIT_LIST_HEAD(&rxq->rx_used);
4550         /* Fill the rx_used queue with _all_ of the Rx buffers */
4551         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4552                 /* In the reset function, these buffers may have been allocated
4553                  * to an SKB, so we need to unmap and free potential storage */
4554                 if (rxq->pool[i].skb != NULL) {
4555                         pci_unmap_single(priv->pci_dev,
4556                                          rxq->pool[i].dma_addr,
4557                                          priv->hw_setting.rx_buf_size,
4558                                          PCI_DMA_FROMDEVICE);
4559                         priv->alloc_rxb_skb--;
4560                         dev_kfree_skb(rxq->pool[i].skb);
4561                         rxq->pool[i].skb = NULL;
4562                 }
4563                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4564         }
4565
4566         /* Set us so that we have processed and used all buffers, but have
4567          * not restocked the Rx queue with fresh buffers */
4568         rxq->read = rxq->write = 0;
4569         rxq->free_count = 0;
4570         spin_unlock_irqrestore(&rxq->lock, flags);
4571 }
4572
4573 /* Convert linear signal-to-noise ratio into dB */
4574 static u8 ratio2dB[100] = {
4575 /*       0   1   2   3   4   5   6   7   8   9 */
4576          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4577         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4578         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4579         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4580         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4581         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4582         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4583         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4584         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4585         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4586 };
4587
4588 /* Calculates a relative dB value from a ratio of linear
4589  *   (i.e. not dB) signal levels.
4590  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4591 int iwl4965_calc_db_from_ratio(int sig_ratio)
4592 {
4593         /* 1000:1 or higher just report as 60 dB */
4594         if (sig_ratio >= 1000)
4595                 return 60;
4596
4597         /* 100:1 or higher, divide by 10 and use table,
4598          *   add 20 dB to make up for divide by 10 */
4599         if (sig_ratio >= 100)
4600                 return (20 + (int)ratio2dB[sig_ratio/10]);
4601
4602         /* We shouldn't see this */
4603         if (sig_ratio < 1)
4604                 return 0;
4605
4606         /* Use table for ratios 1:1 - 99:1 */
4607         return (int)ratio2dB[sig_ratio];
4608 }
4609
4610 #define PERFECT_RSSI (-20) /* dBm */
4611 #define WORST_RSSI (-95)   /* dBm */
4612 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4613
4614 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4615  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4616  *   about formulas used below. */
4617 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4618 {
4619         int sig_qual;
4620         int degradation = PERFECT_RSSI - rssi_dbm;
4621
4622         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4623          * as indicator; formula is (signal dbm - noise dbm).
4624          * SNR at or above 40 is a great signal (100%).
4625          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4626          * Weakest usable signal is usually 10 - 15 dB SNR. */
4627         if (noise_dbm) {
4628                 if (rssi_dbm - noise_dbm >= 40)
4629                         return 100;
4630                 else if (rssi_dbm < noise_dbm)
4631                         return 0;
4632                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4633
4634         /* Else use just the signal level.
4635          * This formula is a least squares fit of data points collected and
4636          *   compared with a reference system that had a percentage (%) display
4637          *   for signal quality. */
4638         } else
4639                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4640                             (15 * RSSI_RANGE + 62 * degradation)) /
4641                            (RSSI_RANGE * RSSI_RANGE);
4642
4643         if (sig_qual > 100)
4644                 sig_qual = 100;
4645         else if (sig_qual < 1)
4646                 sig_qual = 0;
4647
4648         return sig_qual;
4649 }
4650
4651 /**
4652  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4653  *
4654  * Uses the priv->rx_handlers callback function array to invoke
4655  * the appropriate handlers, including command responses,
4656  * frame-received notifications, and other notifications.
4657  */
4658 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4659 {
4660         struct iwl4965_rx_mem_buffer *rxb;
4661         struct iwl4965_rx_packet *pkt;
4662         struct iwl4965_rx_queue *rxq = &priv->rxq;
4663         u32 r, i;
4664         int reclaim;
4665         unsigned long flags;
4666         u8 fill_rx = 0;
4667         u32 count = 0;
4668
4669         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4670          * buffer that the driver may process (last buffer filled by ucode). */
4671         r = iwl4965_hw_get_rx_read(priv);
4672         i = rxq->read;
4673
4674         /* Rx interrupt, but nothing sent from uCode */
4675         if (i == r)
4676                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4677
4678         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4679                 fill_rx = 1;
4680
4681         while (i != r) {
4682                 rxb = rxq->queue[i];
4683
4684                 /* If an RXB doesn't have a Rx queue slot associated with it,
4685                  * then a bug has been introduced in the queue refilling
4686                  * routines -- catch it here */
4687                 BUG_ON(rxb == NULL);
4688
4689                 rxq->queue[i] = NULL;
4690
4691                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4692                                             priv->hw_setting.rx_buf_size,
4693                                             PCI_DMA_FROMDEVICE);
4694                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4695
4696                 /* Reclaim a command buffer only if this packet is a response
4697                  *   to a (driver-originated) command.
4698                  * If the packet (e.g. Rx frame) originated from uCode,
4699                  *   there is no command buffer to reclaim.
4700                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4701                  *   but apparently a few don't get set; catch them here. */
4702                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4703                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4704                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4705                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4706                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4707                         (pkt->hdr.cmd != REPLY_TX);
4708
4709                 /* Based on type of command response or notification,
4710                  *   handle those that need handling via function in
4711                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4712                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4713                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4714                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4715                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4716                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4717                 } else {
4718                         /* No handling needed */
4719                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4720                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4721                                 r, i, get_cmd_string(pkt->hdr.cmd),
4722                                 pkt->hdr.cmd);
4723                 }
4724
4725                 if (reclaim) {
4726                         /* Invoke any callbacks, transfer the skb to caller, and
4727                          * fire off the (possibly) blocking iwl4965_send_cmd()
4728                          * as we reclaim the driver command queue */
4729                         if (rxb && rxb->skb)
4730                                 iwl4965_tx_cmd_complete(priv, rxb);
4731                         else
4732                                 IWL_WARNING("Claim null rxb?\n");
4733                 }
4734
4735                 /* For now we just don't re-use anything.  We can tweak this
4736                  * later to try and re-use notification packets and SKBs that
4737                  * fail to Rx correctly */
4738                 if (rxb->skb != NULL) {
4739                         priv->alloc_rxb_skb--;
4740                         dev_kfree_skb_any(rxb->skb);
4741                         rxb->skb = NULL;
4742                 }
4743
4744                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4745                                  priv->hw_setting.rx_buf_size,
4746                                  PCI_DMA_FROMDEVICE);
4747                 spin_lock_irqsave(&rxq->lock, flags);
4748                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4749                 spin_unlock_irqrestore(&rxq->lock, flags);
4750                 i = (i + 1) & RX_QUEUE_MASK;
4751                 /* If there are a lot of unused frames,
4752                  * restock the Rx queue so ucode wont assert. */
4753                 if (fill_rx) {
4754                         count++;
4755                         if (count >= 8) {
4756                                 priv->rxq.read = i;
4757                                 __iwl4965_rx_replenish(priv);
4758                                 count = 0;
4759                         }
4760                 }
4761         }
4762
4763         /* Backtrack one entry */
4764         priv->rxq.read = i;
4765         iwl4965_rx_queue_restock(priv);
4766 }
4767
4768 /**
4769  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4770  */
4771 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4772                                   struct iwl4965_tx_queue *txq)
4773 {
4774         u32 reg = 0;
4775         int rc = 0;
4776         int txq_id = txq->q.id;
4777
4778         if (txq->need_update == 0)
4779                 return rc;
4780
4781         /* if we're trying to save power */
4782         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4783                 /* wake up nic if it's powered down ...
4784                  * uCode will wake up, and interrupt us again, so next
4785                  * time we'll skip this part. */
4786                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4787
4788                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4789                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4790                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4791                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4792                         return rc;
4793                 }
4794
4795                 /* restore this queue's parameters in nic hardware. */
4796                 rc = iwl4965_grab_nic_access(priv);
4797                 if (rc)
4798                         return rc;
4799                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4800                                      txq->q.write_ptr | (txq_id << 8));
4801                 iwl4965_release_nic_access(priv);
4802
4803         /* else not in power-save mode, uCode will never sleep when we're
4804          * trying to tx (during RFKILL, we're not trying to tx). */
4805         } else
4806                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4807                             txq->q.write_ptr | (txq_id << 8));
4808
4809         txq->need_update = 0;
4810
4811         return rc;
4812 }
4813
4814 #ifdef CONFIG_IWL4965_DEBUG
4815 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4816 {
4817         DECLARE_MAC_BUF(mac);
4818
4819         IWL_DEBUG_RADIO("RX CONFIG:\n");
4820         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4821         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4822         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4823         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4824                         le32_to_cpu(rxon->filter_flags));
4825         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4826         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4827                         rxon->ofdm_basic_rates);
4828         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4829         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4830                         print_mac(mac, rxon->node_addr));
4831         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4832                         print_mac(mac, rxon->bssid_addr));
4833         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4834 }
4835 #endif
4836
4837 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4838 {
4839         IWL_DEBUG_ISR("Enabling interrupts\n");
4840         set_bit(STATUS_INT_ENABLED, &priv->status);
4841         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4842 }
4843
4844 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4845 {
4846         clear_bit(STATUS_INT_ENABLED, &priv->status);
4847
4848         /* disable interrupts from uCode/NIC to host */
4849         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4850
4851         /* acknowledge/clear/reset any interrupts still pending
4852          * from uCode or flow handler (Rx/Tx DMA) */
4853         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4854         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4855         IWL_DEBUG_ISR("Disabled interrupts\n");
4856 }
4857
4858 static const char *desc_lookup(int i)
4859 {
4860         switch (i) {
4861         case 1:
4862                 return "FAIL";
4863         case 2:
4864                 return "BAD_PARAM";
4865         case 3:
4866                 return "BAD_CHECKSUM";
4867         case 4:
4868                 return "NMI_INTERRUPT";
4869         case 5:
4870                 return "SYSASSERT";
4871         case 6:
4872                 return "FATAL_ERROR";
4873         }
4874
4875         return "UNKNOWN";
4876 }
4877
4878 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4879 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4880
4881 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4882 {
4883         u32 data2, line;
4884         u32 desc, time, count, base, data1;
4885         u32 blink1, blink2, ilink1, ilink2;
4886         int rc;
4887
4888         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4889
4890         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4891                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4892                 return;
4893         }
4894
4895         rc = iwl4965_grab_nic_access(priv);
4896         if (rc) {
4897                 IWL_WARNING("Can not read from adapter at this time.\n");
4898                 return;
4899         }
4900
4901         count = iwl4965_read_targ_mem(priv, base);
4902
4903         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4904                 IWL_ERROR("Start IWL Error Log Dump:\n");
4905                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4906                           priv->status, priv->config, count);
4907         }
4908
4909         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4910         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4911         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4912         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4913         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4914         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4915         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4916         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4917         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4918
4919         IWL_ERROR("Desc               Time       "
4920                   "data1      data2      line\n");
4921         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4922                   desc_lookup(desc), desc, time, data1, data2, line);
4923         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4924         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4925                   ilink1, ilink2);
4926
4927         iwl4965_release_nic_access(priv);
4928 }
4929
4930 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4931
4932 /**
4933  * iwl4965_print_event_log - Dump error event log to syslog
4934  *
4935  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4936  */
4937 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4938                                 u32 num_events, u32 mode)
4939 {
4940         u32 i;
4941         u32 base;       /* SRAM byte address of event log header */
4942         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4943         u32 ptr;        /* SRAM byte address of log data */
4944         u32 ev, time, data; /* event log data */
4945
4946         if (num_events == 0)
4947                 return;
4948
4949         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4950
4951         if (mode == 0)
4952                 event_size = 2 * sizeof(u32);
4953         else
4954                 event_size = 3 * sizeof(u32);
4955
4956         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4957
4958         /* "time" is actually "data" for mode 0 (no timestamp).
4959          * place event id # at far right for easier visual parsing. */
4960         for (i = 0; i < num_events; i++) {
4961                 ev = iwl4965_read_targ_mem(priv, ptr);
4962                 ptr += sizeof(u32);
4963                 time = iwl4965_read_targ_mem(priv, ptr);
4964                 ptr += sizeof(u32);
4965                 if (mode == 0)
4966                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4967                 else {
4968                         data = iwl4965_read_targ_mem(priv, ptr);
4969                         ptr += sizeof(u32);
4970                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4971                 }
4972         }
4973 }
4974
4975 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4976 {
4977         int rc;
4978         u32 base;       /* SRAM byte address of event log header */
4979         u32 capacity;   /* event log capacity in # entries */
4980         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4981         u32 num_wraps;  /* # times uCode wrapped to top of log */
4982         u32 next_entry; /* index of next entry to be written by uCode */
4983         u32 size;       /* # entries that we'll print */
4984
4985         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4986         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4987                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4988                 return;
4989         }
4990
4991         rc = iwl4965_grab_nic_access(priv);
4992         if (rc) {
4993                 IWL_WARNING("Can not read from adapter at this time.\n");
4994                 return;
4995         }
4996
4997         /* event log header */
4998         capacity = iwl4965_read_targ_mem(priv, base);
4999         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
5000         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
5001         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
5002
5003         size = num_wraps ? capacity : next_entry;
5004
5005         /* bail out if nothing in log */
5006         if (size == 0) {
5007                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
5008                 iwl4965_release_nic_access(priv);
5009                 return;
5010         }
5011
5012         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
5013                   size, num_wraps);
5014
5015         /* if uCode has wrapped back to top of log, start at the oldest entry,
5016          * i.e the next one that uCode would fill. */
5017         if (num_wraps)
5018                 iwl4965_print_event_log(priv, next_entry,
5019                                     capacity - next_entry, mode);
5020
5021         /* (then/else) start at top of log */
5022         iwl4965_print_event_log(priv, 0, next_entry, mode);
5023
5024         iwl4965_release_nic_access(priv);
5025 }
5026
5027 /**
5028  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
5029  */
5030 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
5031 {
5032         /* Set the FW error flag -- cleared on iwl4965_down */
5033         set_bit(STATUS_FW_ERROR, &priv->status);
5034
5035         /* Cancel currently queued command. */
5036         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
5037
5038 #ifdef CONFIG_IWL4965_DEBUG
5039         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
5040                 iwl4965_dump_nic_error_log(priv);
5041                 iwl4965_dump_nic_event_log(priv);
5042                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
5043         }
5044 #endif
5045
5046         wake_up_interruptible(&priv->wait_command_queue);
5047
5048         /* Keep the restart process from trying to send host
5049          * commands by clearing the INIT status bit */
5050         clear_bit(STATUS_READY, &priv->status);
5051
5052         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5053                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
5054                           "Restarting adapter due to uCode error.\n");
5055
5056                 if (iwl4965_is_associated(priv)) {
5057                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
5058                                sizeof(priv->recovery_rxon));
5059                         priv->error_recovering = 1;
5060                 }
5061                 queue_work(priv->workqueue, &priv->restart);
5062         }
5063 }
5064
5065 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
5066 {
5067         unsigned long flags;
5068
5069         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
5070                sizeof(priv->staging_rxon));
5071         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5072         iwl4965_commit_rxon(priv);
5073
5074         iwl4965_rxon_add_station(priv, priv->bssid, 1);
5075
5076         spin_lock_irqsave(&priv->lock, flags);
5077         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
5078         priv->error_recovering = 0;
5079         spin_unlock_irqrestore(&priv->lock, flags);
5080 }
5081
5082 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
5083 {
5084         u32 inta, handled = 0;
5085         u32 inta_fh;
5086         unsigned long flags;
5087 #ifdef CONFIG_IWL4965_DEBUG
5088         u32 inta_mask;
5089 #endif
5090
5091         spin_lock_irqsave(&priv->lock, flags);
5092
5093         /* Ack/clear/reset pending uCode interrupts.
5094          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
5095          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
5096         inta = iwl4965_read32(priv, CSR_INT);
5097         iwl4965_write32(priv, CSR_INT, inta);
5098
5099         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
5100          * Any new interrupts that happen after this, either while we're
5101          * in this tasklet, or later, will show up in next ISR/tasklet. */
5102         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5103         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
5104
5105 #ifdef CONFIG_IWL4965_DEBUG
5106         if (iwl4965_debug_level & IWL_DL_ISR) {
5107                 /* just for debug */
5108                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5109                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5110                               inta, inta_mask, inta_fh);
5111         }
5112 #endif
5113
5114         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5115          * atomic, make sure that inta covers all the interrupts that
5116          * we've discovered, even if FH interrupt came in just after
5117          * reading CSR_INT. */
5118         if (inta_fh & CSR_FH_INT_RX_MASK)
5119                 inta |= CSR_INT_BIT_FH_RX;
5120         if (inta_fh & CSR_FH_INT_TX_MASK)
5121                 inta |= CSR_INT_BIT_FH_TX;
5122
5123         /* Now service all interrupt bits discovered above. */
5124         if (inta & CSR_INT_BIT_HW_ERR) {
5125                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5126
5127                 /* Tell the device to stop sending interrupts */
5128                 iwl4965_disable_interrupts(priv);
5129
5130                 iwl4965_irq_handle_error(priv);
5131
5132                 handled |= CSR_INT_BIT_HW_ERR;
5133
5134                 spin_unlock_irqrestore(&priv->lock, flags);
5135
5136                 return;
5137         }
5138
5139 #ifdef CONFIG_IWL4965_DEBUG
5140         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5141                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5142                 if (inta & CSR_INT_BIT_SCD)
5143                         IWL_DEBUG_ISR("Scheduler finished to transmit "
5144                                       "the frame/frames.\n");
5145
5146                 /* Alive notification via Rx interrupt will do the real work */
5147                 if (inta & CSR_INT_BIT_ALIVE)
5148                         IWL_DEBUG_ISR("Alive interrupt\n");
5149         }
5150 #endif
5151         /* Safely ignore these bits for debug checks below */
5152         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
5153
5154         /* HW RF KILL switch toggled */
5155         if (inta & CSR_INT_BIT_RF_KILL) {
5156                 int hw_rf_kill = 0;
5157                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
5158                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5159                         hw_rf_kill = 1;
5160
5161                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5162                                 "RF_KILL bit toggled to %s.\n",
5163                                 hw_rf_kill ? "disable radio":"enable radio");
5164
5165                 /* Queue restart only if RF_KILL switch was set to "kill"
5166                  *   when we loaded driver, and is now set to "enable".
5167                  * After we're Alive, RF_KILL gets handled by
5168                  *   iwl_rx_card_state_notif() */
5169                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5170                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
5171                         queue_work(priv->workqueue, &priv->restart);
5172                 }
5173
5174                 handled |= CSR_INT_BIT_RF_KILL;
5175         }
5176
5177         /* Chip got too hot and stopped itself */
5178         if (inta & CSR_INT_BIT_CT_KILL) {
5179                 IWL_ERROR("Microcode CT kill error detected.\n");
5180                 handled |= CSR_INT_BIT_CT_KILL;
5181         }
5182
5183         /* Error detected by uCode */
5184         if (inta & CSR_INT_BIT_SW_ERR) {
5185                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5186                           inta);
5187                 iwl4965_irq_handle_error(priv);
5188                 handled |= CSR_INT_BIT_SW_ERR;
5189         }
5190
5191         /* uCode wakes up after power-down sleep */
5192         if (inta & CSR_INT_BIT_WAKEUP) {
5193                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5194                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
5195                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5196                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5197                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5198                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5199                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5200                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5201
5202                 handled |= CSR_INT_BIT_WAKEUP;
5203         }
5204
5205         /* All uCode command responses, including Tx command responses,
5206          * Rx "responses" (frame-received notification), and other
5207          * notifications from uCode come through here*/
5208         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5209                 iwl4965_rx_handle(priv);
5210                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5211         }
5212
5213         if (inta & CSR_INT_BIT_FH_TX) {
5214                 IWL_DEBUG_ISR("Tx interrupt\n");
5215                 handled |= CSR_INT_BIT_FH_TX;
5216         }
5217
5218         if (inta & ~handled)
5219                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5220
5221         if (inta & ~CSR_INI_SET_MASK) {
5222                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5223                          inta & ~CSR_INI_SET_MASK);
5224                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5225         }
5226
5227         /* Re-enable all interrupts */
5228         iwl4965_enable_interrupts(priv);
5229
5230 #ifdef CONFIG_IWL4965_DEBUG
5231         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5232                 inta = iwl4965_read32(priv, CSR_INT);
5233                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5234                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5235                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5236                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5237         }
5238 #endif
5239         spin_unlock_irqrestore(&priv->lock, flags);
5240 }
5241
5242 static irqreturn_t iwl4965_isr(int irq, void *data)
5243 {
5244         struct iwl4965_priv *priv = data;
5245         u32 inta, inta_mask;
5246         u32 inta_fh;
5247         if (!priv)
5248                 return IRQ_NONE;
5249
5250         spin_lock(&priv->lock);
5251
5252         /* Disable (but don't clear!) interrupts here to avoid
5253          *    back-to-back ISRs and sporadic interrupts from our NIC.
5254          * If we have something to service, the tasklet will re-enable ints.
5255          * If we *don't* have something, we'll re-enable before leaving here. */
5256         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
5257         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
5258
5259         /* Discover which interrupts are active/pending */
5260         inta = iwl4965_read32(priv, CSR_INT);
5261         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5262
5263         /* Ignore interrupt if there's nothing in NIC to service.
5264          * This may be due to IRQ shared with another device,
5265          * or due to sporadic interrupts thrown from our NIC. */
5266         if (!inta && !inta_fh) {
5267                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5268                 goto none;
5269         }
5270
5271         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5272                 /* Hardware disappeared. It might have already raised
5273                  * an interrupt */
5274                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5275                 goto unplugged;
5276         }
5277
5278         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5279                       inta, inta_mask, inta_fh);
5280
5281         inta &= ~CSR_INT_BIT_SCD;
5282
5283         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
5284         if (likely(inta || inta_fh))
5285                 tasklet_schedule(&priv->irq_tasklet);
5286
5287  unplugged:
5288         spin_unlock(&priv->lock);
5289         return IRQ_HANDLED;
5290
5291  none:
5292         /* re-enable interrupts here since we don't have anything to service. */
5293         iwl4965_enable_interrupts(priv);
5294         spin_unlock(&priv->lock);
5295         return IRQ_NONE;
5296 }
5297
5298 /************************** EEPROM BANDS ****************************
5299  *
5300  * The iwl4965_eeprom_band definitions below provide the mapping from the
5301  * EEPROM contents to the specific channel number supported for each
5302  * band.
5303  *
5304  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5305  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5306  * The specific geography and calibration information for that channel
5307  * is contained in the eeprom map itself.
5308  *
5309  * During init, we copy the eeprom information and channel map
5310  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5311  *
5312  * channel_map_24/52 provides the index in the channel_info array for a
5313  * given channel.  We have to have two separate maps as there is channel
5314  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5315  * band_2
5316  *
5317  * A value of 0xff stored in the channel_map indicates that the channel
5318  * is not supported by the hardware at all.
5319  *
5320  * A value of 0xfe in the channel_map indicates that the channel is not
5321  * valid for Tx with the current hardware.  This means that
5322  * while the system can tune and receive on a given channel, it may not
5323  * be able to associate or transmit any frames on that
5324  * channel.  There is no corresponding channel information for that
5325  * entry.
5326  *
5327  *********************************************************************/
5328
5329 /* 2.4 GHz */
5330 static const u8 iwl4965_eeprom_band_1[14] = {
5331         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5332 };
5333
5334 /* 5.2 GHz bands */
5335 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5336         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5337 };
5338
5339 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5340         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5341 };
5342
5343 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5344         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5345 };
5346
5347 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5348         145, 149, 153, 157, 161, 165
5349 };
5350
5351 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5352         1, 2, 3, 4, 5, 6, 7
5353 };
5354
5355 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5356         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5357 };
5358
5359 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5360                                     int band,
5361                                     int *eeprom_ch_count,
5362                                     const struct iwl4965_eeprom_channel
5363                                     **eeprom_ch_info,
5364                                     const u8 **eeprom_ch_index)
5365 {
5366         switch (band) {
5367         case 1:         /* 2.4GHz band */
5368                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5369                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5370                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5371                 break;
5372         case 2:         /* 4.9GHz band */
5373                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5374                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5375                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5376                 break;
5377         case 3:         /* 5.2GHz band */
5378                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5379                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5380                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5381                 break;
5382         case 4:         /* 5.5GHz band */
5383                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5384                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5385                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5386                 break;
5387         case 5:         /* 5.7GHz band */
5388                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5389                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5390                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5391                 break;
5392         case 6:         /* 2.4GHz FAT channels */
5393                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5394                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5395                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5396                 break;
5397         case 7:         /* 5 GHz FAT channels */
5398                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5399                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5400                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5401                 break;
5402         default:
5403                 BUG();
5404                 return;
5405         }
5406 }
5407
5408 /**
5409  * iwl4965_get_channel_info - Find driver's private channel info
5410  *
5411  * Based on band and channel number.
5412  */
5413 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5414                                                     int phymode, u16 channel)
5415 {
5416         int i;
5417
5418         switch (phymode) {
5419         case MODE_IEEE80211A:
5420                 for (i = 14; i < priv->channel_count; i++) {
5421                         if (priv->channel_info[i].channel == channel)
5422                                 return &priv->channel_info[i];
5423                 }
5424                 break;
5425
5426         case MODE_IEEE80211B:
5427         case MODE_IEEE80211G:
5428                 if (channel >= 1 && channel <= 14)
5429                         return &priv->channel_info[channel - 1];
5430                 break;
5431
5432         }
5433
5434         return NULL;
5435 }
5436
5437 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5438                             ? # x " " : "")
5439
5440 /**
5441  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5442  */
5443 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5444 {
5445         int eeprom_ch_count = 0;
5446         const u8 *eeprom_ch_index = NULL;
5447         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5448         int band, ch;
5449         struct iwl4965_channel_info *ch_info;
5450
5451         if (priv->channel_count) {
5452                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5453                 return 0;
5454         }
5455
5456         if (priv->eeprom.version < 0x2f) {
5457                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5458                             priv->eeprom.version);
5459                 return -EINVAL;
5460         }
5461
5462         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5463
5464         priv->channel_count =
5465             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5466             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5467             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5468             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5469             ARRAY_SIZE(iwl4965_eeprom_band_5);
5470
5471         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5472
5473         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5474                                      priv->channel_count, GFP_KERNEL);
5475         if (!priv->channel_info) {
5476                 IWL_ERROR("Could not allocate channel_info\n");
5477                 priv->channel_count = 0;
5478                 return -ENOMEM;
5479         }
5480
5481         ch_info = priv->channel_info;
5482
5483         /* Loop through the 5 EEPROM bands adding them in order to the
5484          * channel map we maintain (that contains additional information than
5485          * what just in the EEPROM) */
5486         for (band = 1; band <= 5; band++) {
5487
5488                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5489                                         &eeprom_ch_info, &eeprom_ch_index);
5490
5491                 /* Loop through each band adding each of the channels */
5492                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5493                         ch_info->channel = eeprom_ch_index[ch];
5494                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5495                             MODE_IEEE80211A;
5496
5497                         /* permanently store EEPROM's channel regulatory flags
5498                          *   and max power in channel info database. */
5499                         ch_info->eeprom = eeprom_ch_info[ch];
5500
5501                         /* Copy the run-time flags so they are there even on
5502                          * invalid channels */
5503                         ch_info->flags = eeprom_ch_info[ch].flags;
5504
5505                         if (!(is_channel_valid(ch_info))) {
5506                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5507                                                "No traffic\n",
5508                                                ch_info->channel,
5509                                                ch_info->flags,
5510                                                is_channel_a_band(ch_info) ?
5511                                                "5.2" : "2.4");
5512                                 ch_info++;
5513                                 continue;
5514                         }
5515
5516                         /* Initialize regulatory-based run-time data */
5517                         ch_info->max_power_avg = ch_info->curr_txpow =
5518                             eeprom_ch_info[ch].max_power_avg;
5519                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5520                         ch_info->min_power = 0;
5521
5522                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5523                                        " %ddBm): Ad-Hoc %ssupported\n",
5524                                        ch_info->channel,
5525                                        is_channel_a_band(ch_info) ?
5526                                        "5.2" : "2.4",
5527                                        CHECK_AND_PRINT(IBSS),
5528                                        CHECK_AND_PRINT(ACTIVE),
5529                                        CHECK_AND_PRINT(RADAR),
5530                                        CHECK_AND_PRINT(WIDE),
5531                                        CHECK_AND_PRINT(NARROW),
5532                                        CHECK_AND_PRINT(DFS),
5533                                        eeprom_ch_info[ch].flags,
5534                                        eeprom_ch_info[ch].max_power_avg,
5535                                        ((eeprom_ch_info[ch].
5536                                          flags & EEPROM_CHANNEL_IBSS)
5537                                         && !(eeprom_ch_info[ch].
5538                                              flags & EEPROM_CHANNEL_RADAR))
5539                                        ? "" : "not ");
5540
5541                         /* Set the user_txpower_limit to the highest power
5542                          * supported by any channel */
5543                         if (eeprom_ch_info[ch].max_power_avg >
5544                             priv->user_txpower_limit)
5545                                 priv->user_txpower_limit =
5546                                     eeprom_ch_info[ch].max_power_avg;
5547
5548                         ch_info++;
5549                 }
5550         }
5551
5552         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5553         for (band = 6; band <= 7; band++) {
5554                 int phymode;
5555                 u8 fat_extension_chan;
5556
5557                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5558                                         &eeprom_ch_info, &eeprom_ch_index);
5559
5560                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5561                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5562
5563                 /* Loop through each band adding each of the channels */
5564                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5565
5566                         if ((band == 6) &&
5567                             ((eeprom_ch_index[ch] == 5) ||
5568                             (eeprom_ch_index[ch] == 6) ||
5569                             (eeprom_ch_index[ch] == 7)))
5570                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5571                         else
5572                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5573
5574                         /* Set up driver's info for lower half */
5575                         iwl4965_set_fat_chan_info(priv, phymode,
5576                                                   eeprom_ch_index[ch],
5577                                                   &(eeprom_ch_info[ch]),
5578                                                   fat_extension_chan);
5579
5580                         /* Set up driver's info for upper half */
5581                         iwl4965_set_fat_chan_info(priv, phymode,
5582                                                   (eeprom_ch_index[ch] + 4),
5583                                                   &(eeprom_ch_info[ch]),
5584                                                   HT_IE_EXT_CHANNEL_BELOW);
5585                 }
5586         }
5587
5588         return 0;
5589 }
5590
5591 /*
5592  * iwl4965_free_channel_map - undo allocations in iwl4965_init_channel_map
5593  */
5594 static void iwl4965_free_channel_map(struct iwl4965_priv *priv)
5595 {
5596         kfree(priv->channel_info);
5597         priv->channel_count = 0;
5598 }
5599
5600 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5601  * sending probe req.  This should be set long enough to hear probe responses
5602  * from more than one AP.  */
5603 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5604 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5605
5606 /* For faster active scanning, scan will move to the next channel if fewer than
5607  * PLCP_QUIET_THRESH packets are heard on this channel within
5608  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5609  * time if it's a quiet channel (nothing responded to our probe, and there's
5610  * no other traffic).
5611  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5612 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5613 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5614
5615 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5616  * Must be set longer than active dwell time.
5617  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5618 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5619 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5620 #define IWL_PASSIVE_DWELL_BASE      (100)
5621 #define IWL_CHANNEL_TUNE_TIME       5
5622
5623 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv, int phymode)
5624 {
5625         if (phymode == MODE_IEEE80211A)
5626                 return IWL_ACTIVE_DWELL_TIME_52;
5627         else
5628                 return IWL_ACTIVE_DWELL_TIME_24;
5629 }
5630
5631 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv, int phymode)
5632 {
5633         u16 active = iwl4965_get_active_dwell_time(priv, phymode);
5634         u16 passive = (phymode != MODE_IEEE80211A) ?
5635             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5636             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5637
5638         if (iwl4965_is_associated(priv)) {
5639                 /* If we're associated, we clamp the maximum passive
5640                  * dwell time to be 98% of the beacon interval (minus
5641                  * 2 * channel tune time) */
5642                 passive = priv->beacon_int;
5643                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5644                         passive = IWL_PASSIVE_DWELL_BASE;
5645                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5646         }
5647
5648         if (passive <= active)
5649                 passive = active + 1;
5650
5651         return passive;
5652 }
5653
5654 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
5655                                      u8 is_active, u8 direct_mask,
5656                                      struct iwl4965_scan_channel *scan_ch)
5657 {
5658         const struct ieee80211_channel *channels = NULL;
5659         const struct ieee80211_hw_mode *hw_mode;
5660         const struct iwl4965_channel_info *ch_info;
5661         u16 passive_dwell = 0;
5662         u16 active_dwell = 0;
5663         int added, i;
5664
5665         hw_mode = iwl4965_get_hw_mode(priv, phymode);
5666         if (!hw_mode)
5667                 return 0;
5668
5669         channels = hw_mode->channels;
5670
5671         active_dwell = iwl4965_get_active_dwell_time(priv, phymode);
5672         passive_dwell = iwl4965_get_passive_dwell_time(priv, phymode);
5673
5674         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5675                 if (channels[i].chan ==
5676                     le16_to_cpu(priv->active_rxon.channel)) {
5677                         if (iwl4965_is_associated(priv)) {
5678                                 IWL_DEBUG_SCAN
5679                                     ("Skipping current channel %d\n",
5680                                      le16_to_cpu(priv->active_rxon.channel));
5681                                 continue;
5682                         }
5683                 } else if (priv->only_active_channel)
5684                         continue;
5685
5686                 scan_ch->channel = channels[i].chan;
5687
5688                 ch_info = iwl4965_get_channel_info(priv, phymode,
5689                                          scan_ch->channel);
5690                 if (!is_channel_valid(ch_info)) {
5691                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5692                                        scan_ch->channel);
5693                         continue;
5694                 }
5695
5696                 if (!is_active || is_channel_passive(ch_info) ||
5697                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5698                         scan_ch->type = 0;      /* passive */
5699                 else
5700                         scan_ch->type = 1;      /* active */
5701
5702                 if (scan_ch->type & 1)
5703                         scan_ch->type |= (direct_mask << 1);
5704
5705                 if (is_channel_narrow(ch_info))
5706                         scan_ch->type |= (1 << 7);
5707
5708                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5709                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5710
5711                 /* Set txpower levels to defaults */
5712                 scan_ch->tpc.dsp_atten = 110;
5713                 /* scan_pwr_info->tpc.dsp_atten; */
5714
5715                 /*scan_pwr_info->tpc.tx_gain; */
5716                 if (phymode == MODE_IEEE80211A)
5717                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5718                 else {
5719                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5720                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5721                          * power level:
5722                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5723                          */
5724                 }
5725
5726                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5727                                scan_ch->channel,
5728                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5729                                (scan_ch->type & 1) ?
5730                                active_dwell : passive_dwell);
5731
5732                 scan_ch++;
5733                 added++;
5734         }
5735
5736         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5737         return added;
5738 }
5739
5740 static void iwl4965_reset_channel_flag(struct iwl4965_priv *priv)
5741 {
5742         int i, j;
5743         for (i = 0; i < 3; i++) {
5744                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5745                 for (j = 0; j < hw_mode->num_channels; j++)
5746                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5747         }
5748 }
5749
5750 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5751                               struct ieee80211_rate *rates)
5752 {
5753         int i;
5754
5755         for (i = 0; i < IWL_RATE_COUNT; i++) {
5756                 rates[i].rate = iwl4965_rates[i].ieee * 5;
5757                 rates[i].val = i; /* Rate scaling will work on indexes */
5758                 rates[i].val2 = i;
5759                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5760                 /* Only OFDM have the bits-per-symbol set */
5761                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5762                         rates[i].flags |= IEEE80211_RATE_OFDM;
5763                 else {
5764                         /*
5765                          * If CCK 1M then set rate flag to CCK else CCK_2
5766                          * which is CCK | PREAMBLE2
5767                          */
5768                         rates[i].flags |= (iwl4965_rates[i].plcp == 10) ?
5769                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5770                 }
5771
5772                 /* Set up which ones are basic rates... */
5773                 if (IWL_BASIC_RATES_MASK & (1 << i))
5774                         rates[i].flags |= IEEE80211_RATE_BASIC;
5775         }
5776 }
5777
5778 /**
5779  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5780  */
5781 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5782 {
5783         struct iwl4965_channel_info *ch;
5784         struct ieee80211_hw_mode *modes;
5785         struct ieee80211_channel *channels;
5786         struct ieee80211_channel *geo_ch;
5787         struct ieee80211_rate *rates;
5788         int i = 0;
5789         enum {
5790                 A = 0,
5791                 B = 1,
5792                 G = 2,
5793         };
5794         int mode_count = 3;
5795
5796         if (priv->modes) {
5797                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5798                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5799                 return 0;
5800         }
5801
5802         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5803                         GFP_KERNEL);
5804         if (!modes)
5805                 return -ENOMEM;
5806
5807         channels = kzalloc(sizeof(struct ieee80211_channel) *
5808                            priv->channel_count, GFP_KERNEL);
5809         if (!channels) {
5810                 kfree(modes);
5811                 return -ENOMEM;
5812         }
5813
5814         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5815                         GFP_KERNEL);
5816         if (!rates) {
5817                 kfree(modes);
5818                 kfree(channels);
5819                 return -ENOMEM;
5820         }
5821
5822         /* 0 = 802.11a
5823          * 1 = 802.11b
5824          * 2 = 802.11g
5825          */
5826
5827         /* 5.2GHz channels start after the 2.4GHz channels */
5828         modes[A].mode = MODE_IEEE80211A;
5829         modes[A].channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5830         modes[A].rates = rates;
5831         modes[A].num_rates = 8; /* just OFDM */
5832         modes[A].rates = &rates[4];
5833         modes[A].num_channels = 0;
5834 #ifdef CONFIG_IWL4965_HT
5835         iwl4965_init_ht_hw_capab(&modes[A].ht_info, MODE_IEEE80211A);
5836 #endif
5837
5838         modes[B].mode = MODE_IEEE80211B;
5839         modes[B].channels = channels;
5840         modes[B].rates = rates;
5841         modes[B].num_rates = 4; /* just CCK */
5842         modes[B].num_channels = 0;
5843
5844         modes[G].mode = MODE_IEEE80211G;
5845         modes[G].channels = channels;
5846         modes[G].rates = rates;
5847         modes[G].num_rates = 12;        /* OFDM & CCK */
5848         modes[G].num_channels = 0;
5849 #ifdef CONFIG_IWL4965_HT
5850         iwl4965_init_ht_hw_capab(&modes[G].ht_info, MODE_IEEE80211G);
5851 #endif
5852
5853         priv->ieee_channels = channels;
5854         priv->ieee_rates = rates;
5855
5856         iwl4965_init_hw_rates(priv, rates);
5857
5858         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5859                 ch = &priv->channel_info[i];
5860
5861                 if (!is_channel_valid(ch)) {
5862                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5863                                     "skipping.\n",
5864                                     ch->channel, is_channel_a_band(ch) ?
5865                                     "5.2" : "2.4");
5866                         continue;
5867                 }
5868
5869                 if (is_channel_a_band(ch)) {
5870                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5871                 } else {
5872                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5873                         modes[G].num_channels++;
5874                 }
5875
5876                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5877                 geo_ch->chan = ch->channel;
5878                 geo_ch->power_level = ch->max_power_avg;
5879                 geo_ch->antenna_max = 0xff;
5880
5881                 if (is_channel_valid(ch)) {
5882                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5883                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5884                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5885
5886                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5887                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5888
5889                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5890                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5891
5892                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5893                                 priv->max_channel_txpower_limit =
5894                                     ch->max_power_avg;
5895                 }
5896
5897                 geo_ch->val = geo_ch->flag;
5898         }
5899
5900         if ((modes[A].num_channels == 0) && priv->is_abg) {
5901                 printk(KERN_INFO DRV_NAME
5902                        ": Incorrectly detected BG card as ABG.  Please send "
5903                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5904                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5905                 priv->is_abg = 0;
5906         }
5907
5908         printk(KERN_INFO DRV_NAME
5909                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5910                modes[G].num_channels, modes[A].num_channels);
5911
5912         /*
5913          * NOTE:  We register these in preference of order -- the
5914          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5915          * a phymode based on rates or AP capabilities but seems to
5916          * configure it purely on if the channel being configured
5917          * is supported by a mode -- and the first match is taken
5918          */
5919
5920         if (modes[G].num_channels)
5921                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5922         if (modes[B].num_channels)
5923                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5924         if (modes[A].num_channels)
5925                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5926
5927         priv->modes = modes;
5928         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5929
5930         return 0;
5931 }
5932
5933 /*
5934  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5935  */
5936 static void iwl4965_free_geos(struct iwl4965_priv *priv)
5937 {
5938         kfree(priv->modes);
5939         kfree(priv->ieee_channels);
5940         kfree(priv->ieee_rates);
5941         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5942 }
5943
5944 /******************************************************************************
5945  *
5946  * uCode download functions
5947  *
5948  ******************************************************************************/
5949
5950 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5951 {
5952         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5953         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5954         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5955         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5956         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5957         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5958 }
5959
5960 /**
5961  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5962  *     looking at all data.
5963  */
5964 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5965                                  u32 len)
5966 {
5967         u32 val;
5968         u32 save_len = len;
5969         int rc = 0;
5970         u32 errcnt;
5971
5972         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5973
5974         rc = iwl4965_grab_nic_access(priv);
5975         if (rc)
5976                 return rc;
5977
5978         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5979
5980         errcnt = 0;
5981         for (; len > 0; len -= sizeof(u32), image++) {
5982                 /* read data comes through single port, auto-incr addr */
5983                 /* NOTE: Use the debugless read so we don't flood kernel log
5984                  * if IWL_DL_IO is set */
5985                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5986                 if (val != le32_to_cpu(*image)) {
5987                         IWL_ERROR("uCode INST section is invalid at "
5988                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5989                                   save_len - len, val, le32_to_cpu(*image));
5990                         rc = -EIO;
5991                         errcnt++;
5992                         if (errcnt >= 20)
5993                                 break;
5994                 }
5995         }
5996
5997         iwl4965_release_nic_access(priv);
5998
5999         if (!errcnt)
6000                 IWL_DEBUG_INFO
6001                     ("ucode image in INSTRUCTION memory is good\n");
6002
6003         return rc;
6004 }
6005
6006
6007 /**
6008  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
6009  *   using sample data 100 bytes apart.  If these sample points are good,
6010  *   it's a pretty good bet that everything between them is good, too.
6011  */
6012 static int iwl4965_verify_inst_sparse(struct iwl4965_priv *priv, __le32 *image, u32 len)
6013 {
6014         u32 val;
6015         int rc = 0;
6016         u32 errcnt = 0;
6017         u32 i;
6018
6019         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
6020
6021         rc = iwl4965_grab_nic_access(priv);
6022         if (rc)
6023                 return rc;
6024
6025         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
6026                 /* read data comes through single port, auto-incr addr */
6027                 /* NOTE: Use the debugless read so we don't flood kernel log
6028                  * if IWL_DL_IO is set */
6029                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
6030                         i + RTC_INST_LOWER_BOUND);
6031                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
6032                 if (val != le32_to_cpu(*image)) {
6033 #if 0 /* Enable this if you want to see details */
6034                         IWL_ERROR("uCode INST section is invalid at "
6035                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
6036                                   i, val, *image);
6037 #endif
6038                         rc = -EIO;
6039                         errcnt++;
6040                         if (errcnt >= 3)
6041                                 break;
6042                 }
6043         }
6044
6045         iwl4965_release_nic_access(priv);
6046
6047         return rc;
6048 }
6049
6050
6051 /**
6052  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
6053  *    and verify its contents
6054  */
6055 static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
6056 {
6057         __le32 *image;
6058         u32 len;
6059         int rc = 0;
6060
6061         /* Try bootstrap */
6062         image = (__le32 *)priv->ucode_boot.v_addr;
6063         len = priv->ucode_boot.len;
6064         rc = iwl4965_verify_inst_sparse(priv, image, len);
6065         if (rc == 0) {
6066                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
6067                 return 0;
6068         }
6069
6070         /* Try initialize */
6071         image = (__le32 *)priv->ucode_init.v_addr;
6072         len = priv->ucode_init.len;
6073         rc = iwl4965_verify_inst_sparse(priv, image, len);
6074         if (rc == 0) {
6075                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
6076                 return 0;
6077         }
6078
6079         /* Try runtime/protocol */
6080         image = (__le32 *)priv->ucode_code.v_addr;
6081         len = priv->ucode_code.len;
6082         rc = iwl4965_verify_inst_sparse(priv, image, len);
6083         if (rc == 0) {
6084                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
6085                 return 0;
6086         }
6087
6088         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
6089
6090         /* Since nothing seems to match, show first several data entries in
6091          * instruction SRAM, so maybe visual inspection will give a clue.
6092          * Selection of bootstrap image (vs. other images) is arbitrary. */
6093         image = (__le32 *)priv->ucode_boot.v_addr;
6094         len = priv->ucode_boot.len;
6095         rc = iwl4965_verify_inst_full(priv, image, len);
6096
6097         return rc;
6098 }
6099
6100
6101 /* check contents of special bootstrap uCode SRAM */
6102 static int iwl4965_verify_bsm(struct iwl4965_priv *priv)
6103 {
6104         __le32 *image = priv->ucode_boot.v_addr;
6105         u32 len = priv->ucode_boot.len;
6106         u32 reg;
6107         u32 val;
6108
6109         IWL_DEBUG_INFO("Begin verify bsm\n");
6110
6111         /* verify BSM SRAM contents */
6112         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
6113         for (reg = BSM_SRAM_LOWER_BOUND;
6114              reg < BSM_SRAM_LOWER_BOUND + len;
6115              reg += sizeof(u32), image ++) {
6116                 val = iwl4965_read_prph(priv, reg);
6117                 if (val != le32_to_cpu(*image)) {
6118                         IWL_ERROR("BSM uCode verification failed at "
6119                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6120                                   BSM_SRAM_LOWER_BOUND,
6121                                   reg - BSM_SRAM_LOWER_BOUND, len,
6122                                   val, le32_to_cpu(*image));
6123                         return -EIO;
6124                 }
6125         }
6126
6127         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6128
6129         return 0;
6130 }
6131
6132 /**
6133  * iwl4965_load_bsm - Load bootstrap instructions
6134  *
6135  * BSM operation:
6136  *
6137  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6138  * in special SRAM that does not power down during RFKILL.  When powering back
6139  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6140  * the bootstrap program into the on-board processor, and starts it.
6141  *
6142  * The bootstrap program loads (via DMA) instructions and data for a new
6143  * program from host DRAM locations indicated by the host driver in the
6144  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6145  * automatically.
6146  *
6147  * When initializing the NIC, the host driver points the BSM to the
6148  * "initialize" uCode image.  This uCode sets up some internal data, then
6149  * notifies host via "initialize alive" that it is complete.
6150  *
6151  * The host then replaces the BSM_DRAM_* pointer values to point to the
6152  * normal runtime uCode instructions and a backup uCode data cache buffer
6153  * (filled initially with starting data values for the on-board processor),
6154  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6155  * which begins normal operation.
6156  *
6157  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6158  * the backup data cache in DRAM before SRAM is powered down.
6159  *
6160  * When powering back up, the BSM loads the bootstrap program.  This reloads
6161  * the runtime uCode instructions and the backup data cache into SRAM,
6162  * and re-launches the runtime uCode from where it left off.
6163  */
6164 static int iwl4965_load_bsm(struct iwl4965_priv *priv)
6165 {
6166         __le32 *image = priv->ucode_boot.v_addr;
6167         u32 len = priv->ucode_boot.len;
6168         dma_addr_t pinst;
6169         dma_addr_t pdata;
6170         u32 inst_len;
6171         u32 data_len;
6172         int rc;
6173         int i;
6174         u32 done;
6175         u32 reg_offset;
6176
6177         IWL_DEBUG_INFO("Begin load bsm\n");
6178
6179         /* make sure bootstrap program is no larger than BSM's SRAM size */
6180         if (len > IWL_MAX_BSM_SIZE)
6181                 return -EINVAL;
6182
6183         /* Tell bootstrap uCode where to find the "Initialize" uCode
6184          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
6185          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
6186          *        after the "initialize" uCode has run, to point to
6187          *        runtime/protocol instructions and backup data cache. */
6188         pinst = priv->ucode_init.p_addr >> 4;
6189         pdata = priv->ucode_init_data.p_addr >> 4;
6190         inst_len = priv->ucode_init.len;
6191         data_len = priv->ucode_init_data.len;
6192
6193         rc = iwl4965_grab_nic_access(priv);
6194         if (rc)
6195                 return rc;
6196
6197         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6198         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6199         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6200         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6201
6202         /* Fill BSM memory with bootstrap instructions */
6203         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6204              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6205              reg_offset += sizeof(u32), image++)
6206                 _iwl4965_write_prph(priv, reg_offset,
6207                                           le32_to_cpu(*image));
6208
6209         rc = iwl4965_verify_bsm(priv);
6210         if (rc) {
6211                 iwl4965_release_nic_access(priv);
6212                 return rc;
6213         }
6214
6215         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6216         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
6217         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
6218                                  RTC_INST_LOWER_BOUND);
6219         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6220
6221         /* Load bootstrap code into instruction SRAM now,
6222          *   to prepare to load "initialize" uCode */
6223         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6224                 BSM_WR_CTRL_REG_BIT_START);
6225
6226         /* Wait for load of bootstrap uCode to finish */
6227         for (i = 0; i < 100; i++) {
6228                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
6229                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6230                         break;
6231                 udelay(10);
6232         }
6233         if (i < 100)
6234                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6235         else {
6236                 IWL_ERROR("BSM write did not complete!\n");
6237                 return -EIO;
6238         }
6239
6240         /* Enable future boot loads whenever power management unit triggers it
6241          *   (e.g. when powering back up after power-save shutdown) */
6242         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6243                 BSM_WR_CTRL_REG_BIT_START_EN);
6244
6245         iwl4965_release_nic_access(priv);
6246
6247         return 0;
6248 }
6249
6250 static void iwl4965_nic_start(struct iwl4965_priv *priv)
6251 {
6252         /* Remove all resets to allow NIC to operate */
6253         iwl4965_write32(priv, CSR_RESET, 0);
6254 }
6255
6256
6257 /**
6258  * iwl4965_read_ucode - Read uCode images from disk file.
6259  *
6260  * Copy into buffers for card to fetch via bus-mastering
6261  */
6262 static int iwl4965_read_ucode(struct iwl4965_priv *priv)
6263 {
6264         struct iwl4965_ucode *ucode;
6265         int ret;
6266         const struct firmware *ucode_raw;
6267         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6268         u8 *src;
6269         size_t len;
6270         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6271
6272         /* Ask kernel firmware_class module to get the boot firmware off disk.
6273          * request_firmware() is synchronous, file is in memory on return. */
6274         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6275         if (ret < 0) {
6276                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
6277                                         name, ret);
6278                 goto error;
6279         }
6280
6281         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6282                        name, ucode_raw->size);
6283
6284         /* Make sure that we got at least our header! */
6285         if (ucode_raw->size < sizeof(*ucode)) {
6286                 IWL_ERROR("File size way too small!\n");
6287                 ret = -EINVAL;
6288                 goto err_release;
6289         }
6290
6291         /* Data from ucode file:  header followed by uCode images */
6292         ucode = (void *)ucode_raw->data;
6293
6294         ver = le32_to_cpu(ucode->ver);
6295         inst_size = le32_to_cpu(ucode->inst_size);
6296         data_size = le32_to_cpu(ucode->data_size);
6297         init_size = le32_to_cpu(ucode->init_size);
6298         init_data_size = le32_to_cpu(ucode->init_data_size);
6299         boot_size = le32_to_cpu(ucode->boot_size);
6300
6301         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6302         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6303                        inst_size);
6304         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6305                        data_size);
6306         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6307                        init_size);
6308         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6309                        init_data_size);
6310         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6311                        boot_size);
6312
6313         /* Verify size of file vs. image size info in file's header */
6314         if (ucode_raw->size < sizeof(*ucode) +
6315                 inst_size + data_size + init_size +
6316                 init_data_size + boot_size) {
6317
6318                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6319                                (int)ucode_raw->size);
6320                 ret = -EINVAL;
6321                 goto err_release;
6322         }
6323
6324         /* Verify that uCode images will fit in card's SRAM */
6325         if (inst_size > IWL_MAX_INST_SIZE) {
6326                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
6327                                inst_size);
6328                 ret = -EINVAL;
6329                 goto err_release;
6330         }
6331
6332         if (data_size > IWL_MAX_DATA_SIZE) {
6333                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
6334                                 data_size);
6335                 ret = -EINVAL;
6336                 goto err_release;
6337         }
6338         if (init_size > IWL_MAX_INST_SIZE) {
6339                 IWL_DEBUG_INFO
6340                     ("uCode init instr len %d too large to fit in\n",
6341                       init_size);
6342                 ret = -EINVAL;
6343                 goto err_release;
6344         }
6345         if (init_data_size > IWL_MAX_DATA_SIZE) {
6346                 IWL_DEBUG_INFO
6347                     ("uCode init data len %d too large to fit in\n",
6348                       init_data_size);
6349                 ret = -EINVAL;
6350                 goto err_release;
6351         }
6352         if (boot_size > IWL_MAX_BSM_SIZE) {
6353                 IWL_DEBUG_INFO
6354                     ("uCode boot instr len %d too large to fit in\n",
6355                       boot_size);
6356                 ret = -EINVAL;
6357                 goto err_release;
6358         }
6359
6360         /* Allocate ucode buffers for card's bus-master loading ... */
6361
6362         /* Runtime instructions and 2 copies of data:
6363          * 1) unmodified from disk
6364          * 2) backup cache for save/restore during power-downs */
6365         priv->ucode_code.len = inst_size;
6366         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
6367
6368         priv->ucode_data.len = data_size;
6369         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
6370
6371         priv->ucode_data_backup.len = data_size;
6372         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
6373
6374         /* Initialization instructions and data */
6375         if (init_size && init_data_size) {
6376                 priv->ucode_init.len = init_size;
6377                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
6378
6379                 priv->ucode_init_data.len = init_data_size;
6380                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
6381
6382                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6383                         goto err_pci_alloc;
6384         }
6385
6386         /* Bootstrap (instructions only, no data) */
6387         if (boot_size) {
6388                 priv->ucode_boot.len = boot_size;
6389                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6390
6391                 if (!priv->ucode_boot.v_addr)
6392                         goto err_pci_alloc;
6393         }
6394
6395         /* Copy images into buffers for card's bus-master reads ... */
6396
6397         /* Runtime instructions (first block of data in file) */
6398         src = &ucode->data[0];
6399         len = priv->ucode_code.len;
6400         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6401         memcpy(priv->ucode_code.v_addr, src, len);
6402         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6403                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6404
6405         /* Runtime data (2nd block)
6406          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
6407         src = &ucode->data[inst_size];
6408         len = priv->ucode_data.len;
6409         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6410         memcpy(priv->ucode_data.v_addr, src, len);
6411         memcpy(priv->ucode_data_backup.v_addr, src, len);
6412
6413         /* Initialization instructions (3rd block) */
6414         if (init_size) {
6415                 src = &ucode->data[inst_size + data_size];
6416                 len = priv->ucode_init.len;
6417                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6418                                 len);
6419                 memcpy(priv->ucode_init.v_addr, src, len);
6420         }
6421
6422         /* Initialization data (4th block) */
6423         if (init_data_size) {
6424                 src = &ucode->data[inst_size + data_size + init_size];
6425                 len = priv->ucode_init_data.len;
6426                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
6427                                len);
6428                 memcpy(priv->ucode_init_data.v_addr, src, len);
6429         }
6430
6431         /* Bootstrap instructions (5th block) */
6432         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6433         len = priv->ucode_boot.len;
6434         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
6435         memcpy(priv->ucode_boot.v_addr, src, len);
6436
6437         /* We have our copies now, allow OS release its copies */
6438         release_firmware(ucode_raw);
6439         return 0;
6440
6441  err_pci_alloc:
6442         IWL_ERROR("failed to allocate pci memory\n");
6443         ret = -ENOMEM;
6444         iwl4965_dealloc_ucode_pci(priv);
6445
6446  err_release:
6447         release_firmware(ucode_raw);
6448
6449  error:
6450         return ret;
6451 }
6452
6453
6454 /**
6455  * iwl4965_set_ucode_ptrs - Set uCode address location
6456  *
6457  * Tell initialization uCode where to find runtime uCode.
6458  *
6459  * BSM registers initially contain pointers to initialization uCode.
6460  * We need to replace them to load runtime uCode inst and data,
6461  * and to save runtime data when powering down.
6462  */
6463 static int iwl4965_set_ucode_ptrs(struct iwl4965_priv *priv)
6464 {
6465         dma_addr_t pinst;
6466         dma_addr_t pdata;
6467         int rc = 0;
6468         unsigned long flags;
6469
6470         /* bits 35:4 for 4965 */
6471         pinst = priv->ucode_code.p_addr >> 4;
6472         pdata = priv->ucode_data_backup.p_addr >> 4;
6473
6474         spin_lock_irqsave(&priv->lock, flags);
6475         rc = iwl4965_grab_nic_access(priv);
6476         if (rc) {
6477                 spin_unlock_irqrestore(&priv->lock, flags);
6478                 return rc;
6479         }
6480
6481         /* Tell bootstrap uCode where to find image to load */
6482         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6483         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6484         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6485                                  priv->ucode_data.len);
6486
6487         /* Inst bytecount must be last to set up, bit 31 signals uCode
6488          *   that all new ptr/size info is in place */
6489         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6490                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6491
6492         iwl4965_release_nic_access(priv);
6493
6494         spin_unlock_irqrestore(&priv->lock, flags);
6495
6496         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6497
6498         return rc;
6499 }
6500
6501 /**
6502  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
6503  *
6504  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6505  *
6506  * The 4965 "initialize" ALIVE reply contains calibration data for:
6507  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6508  *   (3945 does not contain this data).
6509  *
6510  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6511 */
6512 static void iwl4965_init_alive_start(struct iwl4965_priv *priv)
6513 {
6514         /* Check alive response for "valid" sign from uCode */
6515         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6516                 /* We had an error bringing up the hardware, so take it
6517                  * all the way back down so we can try again */
6518                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6519                 goto restart;
6520         }
6521
6522         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6523          * This is a paranoid check, because we would not have gotten the
6524          * "initialize" alive if code weren't properly loaded.  */
6525         if (iwl4965_verify_ucode(priv)) {
6526                 /* Runtime instruction load was bad;
6527                  * take it all the way back down so we can try again */
6528                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6529                 goto restart;
6530         }
6531
6532         /* Calculate temperature */
6533         priv->temperature = iwl4965_get_temperature(priv);
6534
6535         /* Send pointers to protocol/runtime uCode image ... init code will
6536          * load and launch runtime uCode, which will send us another "Alive"
6537          * notification. */
6538         IWL_DEBUG_INFO("Initialization Alive received.\n");
6539         if (iwl4965_set_ucode_ptrs(priv)) {
6540                 /* Runtime instruction load won't happen;
6541                  * take it all the way back down so we can try again */
6542                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6543                 goto restart;
6544         }
6545         return;
6546
6547  restart:
6548         queue_work(priv->workqueue, &priv->restart);
6549 }
6550
6551
6552 /**
6553  * iwl4965_alive_start - called after REPLY_ALIVE notification received
6554  *                   from protocol/runtime uCode (initialization uCode's
6555  *                   Alive gets handled by iwl4965_init_alive_start()).
6556  */
6557 static void iwl4965_alive_start(struct iwl4965_priv *priv)
6558 {
6559         int rc = 0;
6560
6561         IWL_DEBUG_INFO("Runtime Alive received.\n");
6562
6563         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6564                 /* We had an error bringing up the hardware, so take it
6565                  * all the way back down so we can try again */
6566                 IWL_DEBUG_INFO("Alive failed.\n");
6567                 goto restart;
6568         }
6569
6570         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6571          * This is a paranoid check, because we would not have gotten the
6572          * "runtime" alive if code weren't properly loaded.  */
6573         if (iwl4965_verify_ucode(priv)) {
6574                 /* Runtime instruction load was bad;
6575                  * take it all the way back down so we can try again */
6576                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6577                 goto restart;
6578         }
6579
6580         iwl4965_clear_stations_table(priv);
6581
6582         rc = iwl4965_alive_notify(priv);
6583         if (rc) {
6584                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6585                             rc);
6586                 goto restart;
6587         }
6588
6589         /* After the ALIVE response, we can send host commands to 4965 uCode */
6590         set_bit(STATUS_ALIVE, &priv->status);
6591
6592         /* Clear out the uCode error bit if it is set */
6593         clear_bit(STATUS_FW_ERROR, &priv->status);
6594
6595         if (iwl4965_is_rfkill(priv))
6596                 return;
6597
6598         ieee80211_start_queues(priv->hw);
6599
6600         priv->active_rate = priv->rates_mask;
6601         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6602
6603         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6604
6605         if (iwl4965_is_associated(priv)) {
6606                 struct iwl4965_rxon_cmd *active_rxon =
6607                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
6608
6609                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6610                        sizeof(priv->staging_rxon));
6611                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6612         } else {
6613                 /* Initialize our rx_config data */
6614                 iwl4965_connection_init_rx_config(priv);
6615                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6616         }
6617
6618         /* Configure Bluetooth device coexistence support */
6619         iwl4965_send_bt_config(priv);
6620
6621         /* Configure the adapter for unassociated operation */
6622         iwl4965_commit_rxon(priv);
6623
6624         /* At this point, the NIC is initialized and operational */
6625         priv->notif_missed_beacons = 0;
6626         set_bit(STATUS_READY, &priv->status);
6627
6628         iwl4965_rf_kill_ct_config(priv);
6629
6630         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6631         wake_up_interruptible(&priv->wait_command_queue);
6632
6633         if (priv->error_recovering)
6634                 iwl4965_error_recovery(priv);
6635
6636         return;
6637
6638  restart:
6639         queue_work(priv->workqueue, &priv->restart);
6640 }
6641
6642 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv);
6643
6644 static void __iwl4965_down(struct iwl4965_priv *priv)
6645 {
6646         unsigned long flags;
6647         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6648         struct ieee80211_conf *conf = NULL;
6649
6650         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6651
6652         conf = ieee80211_get_hw_conf(priv->hw);
6653
6654         if (!exit_pending)
6655                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6656
6657         iwl4965_clear_stations_table(priv);
6658
6659         /* Unblock any waiting calls */
6660         wake_up_interruptible_all(&priv->wait_command_queue);
6661
6662         /* Wipe out the EXIT_PENDING status bit if we are not actually
6663          * exiting the module */
6664         if (!exit_pending)
6665                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6666
6667         /* stop and reset the on-board processor */
6668         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6669
6670         /* tell the device to stop sending interrupts */
6671         iwl4965_disable_interrupts(priv);
6672
6673         if (priv->mac80211_registered)
6674                 ieee80211_stop_queues(priv->hw);
6675
6676         /* If we have not previously called iwl4965_init() then
6677          * clear all bits but the RF Kill and SUSPEND bits and return */
6678         if (!iwl4965_is_init(priv)) {
6679                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6680                                         STATUS_RF_KILL_HW |
6681                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6682                                         STATUS_RF_KILL_SW |
6683                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6684                                         STATUS_IN_SUSPEND;
6685                 goto exit;
6686         }
6687
6688         /* ...otherwise clear out all the status bits but the RF Kill and
6689          * SUSPEND bits and continue taking the NIC down. */
6690         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6691                                 STATUS_RF_KILL_HW |
6692                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6693                                 STATUS_RF_KILL_SW |
6694                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6695                                 STATUS_IN_SUSPEND |
6696                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6697                                 STATUS_FW_ERROR;
6698
6699         spin_lock_irqsave(&priv->lock, flags);
6700         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
6701                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6702         spin_unlock_irqrestore(&priv->lock, flags);
6703
6704         iwl4965_hw_txq_ctx_stop(priv);
6705         iwl4965_hw_rxq_stop(priv);
6706
6707         spin_lock_irqsave(&priv->lock, flags);
6708         if (!iwl4965_grab_nic_access(priv)) {
6709                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
6710                                          APMG_CLK_VAL_DMA_CLK_RQT);
6711                 iwl4965_release_nic_access(priv);
6712         }
6713         spin_unlock_irqrestore(&priv->lock, flags);
6714
6715         udelay(5);
6716
6717         iwl4965_hw_nic_stop_master(priv);
6718         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6719         iwl4965_hw_nic_reset(priv);
6720
6721  exit:
6722         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6723
6724         if (priv->ibss_beacon)
6725                 dev_kfree_skb(priv->ibss_beacon);
6726         priv->ibss_beacon = NULL;
6727
6728         /* clear out any free frames */
6729         iwl4965_clear_free_frames(priv);
6730 }
6731
6732 static void iwl4965_down(struct iwl4965_priv *priv)
6733 {
6734         mutex_lock(&priv->mutex);
6735         __iwl4965_down(priv);
6736         mutex_unlock(&priv->mutex);
6737
6738         iwl4965_cancel_deferred_work(priv);
6739 }
6740
6741 #define MAX_HW_RESTARTS 5
6742
6743 static int __iwl4965_up(struct iwl4965_priv *priv)
6744 {
6745         int rc, i;
6746
6747         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6748                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6749                 return -EIO;
6750         }
6751
6752         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6753                 IWL_WARNING("Radio disabled by SW RF kill (module "
6754                             "parameter)\n");
6755                 return -ENODEV;
6756         }
6757
6758         /* If platform's RF_KILL switch is NOT set to KILL */
6759         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6760                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6761                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6762         else {
6763                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6764                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6765                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6766                         return -ENODEV;
6767                 }
6768         }
6769
6770         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6771                 IWL_ERROR("ucode not available for device bringup\n");
6772                 return -EIO;
6773         }
6774
6775         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6776
6777         rc = iwl4965_hw_nic_init(priv);
6778         if (rc) {
6779                 IWL_ERROR("Unable to int nic\n");
6780                 return rc;
6781         }
6782
6783         /* make sure rfkill handshake bits are cleared */
6784         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6785         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6786                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6787
6788         /* clear (again), then enable host interrupts */
6789         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6790         iwl4965_enable_interrupts(priv);
6791
6792         /* really make sure rfkill handshake bits are cleared */
6793         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6794         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6795
6796         /* Copy original ucode data image from disk into backup cache.
6797          * This will be used to initialize the on-board processor's
6798          * data SRAM for a clean start when the runtime program first loads. */
6799         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6800                priv->ucode_data.len);
6801
6802         /* We return success when we resume from suspend and rf_kill is on. */
6803         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6804                 return 0;
6805
6806         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6807
6808                 iwl4965_clear_stations_table(priv);
6809
6810                 /* load bootstrap state machine,
6811                  * load bootstrap program into processor's memory,
6812                  * prepare to load the "initialize" uCode */
6813                 rc = iwl4965_load_bsm(priv);
6814
6815                 if (rc) {
6816                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6817                         continue;
6818                 }
6819
6820                 /* start card; "initialize" will load runtime ucode */
6821                 iwl4965_nic_start(priv);
6822
6823                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6824
6825                 return 0;
6826         }
6827
6828         set_bit(STATUS_EXIT_PENDING, &priv->status);
6829         __iwl4965_down(priv);
6830
6831         /* tried to restart and config the device for as long as our
6832          * patience could withstand */
6833         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6834         return -EIO;
6835 }
6836
6837
6838 /*****************************************************************************
6839  *
6840  * Workqueue callbacks
6841  *
6842  *****************************************************************************/
6843
6844 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6845 {
6846         struct iwl4965_priv *priv =
6847             container_of(data, struct iwl4965_priv, init_alive_start.work);
6848
6849         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6850                 return;
6851
6852         mutex_lock(&priv->mutex);
6853         iwl4965_init_alive_start(priv);
6854         mutex_unlock(&priv->mutex);
6855 }
6856
6857 static void iwl4965_bg_alive_start(struct work_struct *data)
6858 {
6859         struct iwl4965_priv *priv =
6860             container_of(data, struct iwl4965_priv, alive_start.work);
6861
6862         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6863                 return;
6864
6865         mutex_lock(&priv->mutex);
6866         iwl4965_alive_start(priv);
6867         mutex_unlock(&priv->mutex);
6868 }
6869
6870 static void iwl4965_bg_rf_kill(struct work_struct *work)
6871 {
6872         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, rf_kill);
6873
6874         wake_up_interruptible(&priv->wait_command_queue);
6875
6876         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6877                 return;
6878
6879         mutex_lock(&priv->mutex);
6880
6881         if (!iwl4965_is_rfkill(priv)) {
6882                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6883                           "HW and/or SW RF Kill no longer active, restarting "
6884                           "device\n");
6885                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6886                         queue_work(priv->workqueue, &priv->restart);
6887         } else {
6888
6889                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6890                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6891                                           "disabled by SW switch\n");
6892                 else
6893                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6894                                     "Kill switch must be turned off for "
6895                                     "wireless networking to work.\n");
6896         }
6897         mutex_unlock(&priv->mutex);
6898 }
6899
6900 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6901
6902 static void iwl4965_bg_scan_check(struct work_struct *data)
6903 {
6904         struct iwl4965_priv *priv =
6905             container_of(data, struct iwl4965_priv, scan_check.work);
6906
6907         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6908                 return;
6909
6910         mutex_lock(&priv->mutex);
6911         if (test_bit(STATUS_SCANNING, &priv->status) ||
6912             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6913                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6914                           "Scan completion watchdog resetting adapter (%dms)\n",
6915                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6916
6917                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6918                         iwl4965_send_scan_abort(priv);
6919         }
6920         mutex_unlock(&priv->mutex);
6921 }
6922
6923 static void iwl4965_bg_request_scan(struct work_struct *data)
6924 {
6925         struct iwl4965_priv *priv =
6926             container_of(data, struct iwl4965_priv, request_scan);
6927         struct iwl4965_host_cmd cmd = {
6928                 .id = REPLY_SCAN_CMD,
6929                 .len = sizeof(struct iwl4965_scan_cmd),
6930                 .meta.flags = CMD_SIZE_HUGE,
6931         };
6932         int rc = 0;
6933         struct iwl4965_scan_cmd *scan;
6934         struct ieee80211_conf *conf = NULL;
6935         u8 direct_mask;
6936         int phymode;
6937
6938         conf = ieee80211_get_hw_conf(priv->hw);
6939
6940         mutex_lock(&priv->mutex);
6941
6942         if (!iwl4965_is_ready(priv)) {
6943                 IWL_WARNING("request scan called when driver not ready.\n");
6944                 goto done;
6945         }
6946
6947         /* Make sure the scan wasn't cancelled before this queued work
6948          * was given the chance to run... */
6949         if (!test_bit(STATUS_SCANNING, &priv->status))
6950                 goto done;
6951
6952         /* This should never be called or scheduled if there is currently
6953          * a scan active in the hardware. */
6954         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6955                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6956                                "Ignoring second request.\n");
6957                 rc = -EIO;
6958                 goto done;
6959         }
6960
6961         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6962                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6963                 goto done;
6964         }
6965
6966         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6967                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6968                 goto done;
6969         }
6970
6971         if (iwl4965_is_rfkill(priv)) {
6972                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6973                 goto done;
6974         }
6975
6976         if (!test_bit(STATUS_READY, &priv->status)) {
6977                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6978                 goto done;
6979         }
6980
6981         if (!priv->scan_bands) {
6982                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6983                 goto done;
6984         }
6985
6986         if (!priv->scan) {
6987                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6988                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6989                 if (!priv->scan) {
6990                         rc = -ENOMEM;
6991                         goto done;
6992                 }
6993         }
6994         scan = priv->scan;
6995         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6996
6997         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6998         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6999
7000         if (iwl4965_is_associated(priv)) {
7001                 u16 interval = 0;
7002                 u32 extra;
7003                 u32 suspend_time = 100;
7004                 u32 scan_suspend_time = 100;
7005                 unsigned long flags;
7006
7007                 IWL_DEBUG_INFO("Scanning while associated...\n");
7008
7009                 spin_lock_irqsave(&priv->lock, flags);
7010                 interval = priv->beacon_int;
7011                 spin_unlock_irqrestore(&priv->lock, flags);
7012
7013                 scan->suspend_time = 0;
7014                 scan->max_out_time = cpu_to_le32(200 * 1024);
7015                 if (!interval)
7016                         interval = suspend_time;
7017
7018                 extra = (suspend_time / interval) << 22;
7019                 scan_suspend_time = (extra |
7020                     ((suspend_time % interval) * 1024));
7021                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
7022                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
7023                                scan_suspend_time, interval);
7024         }
7025
7026         /* We should add the ability for user to lock to PASSIVE ONLY */
7027         if (priv->one_direct_scan) {
7028                 IWL_DEBUG_SCAN
7029                     ("Kicking off one direct scan for '%s'\n",
7030                      iwl4965_escape_essid(priv->direct_ssid,
7031                                       priv->direct_ssid_len));
7032                 scan->direct_scan[0].id = WLAN_EID_SSID;
7033                 scan->direct_scan[0].len = priv->direct_ssid_len;
7034                 memcpy(scan->direct_scan[0].ssid,
7035                        priv->direct_ssid, priv->direct_ssid_len);
7036                 direct_mask = 1;
7037         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
7038                 scan->direct_scan[0].id = WLAN_EID_SSID;
7039                 scan->direct_scan[0].len = priv->essid_len;
7040                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
7041                 direct_mask = 1;
7042         } else
7043                 direct_mask = 0;
7044
7045         /* We don't build a direct scan probe request; the uCode will do
7046          * that based on the direct_mask added to each channel entry */
7047         scan->tx_cmd.len = cpu_to_le16(
7048                 iwl4965_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
7049                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
7050         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
7051         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
7052         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
7053
7054         /* flags + rate selection */
7055
7056         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
7057
7058         switch (priv->scan_bands) {
7059         case 2:
7060                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7061                 scan->tx_cmd.rate_n_flags =
7062                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7063                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7064
7065                 scan->good_CRC_th = 0;
7066                 phymode = MODE_IEEE80211G;
7067                 break;
7068
7069         case 1:
7070                 scan->tx_cmd.rate_n_flags =
7071                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7072                                 RATE_MCS_ANT_B_MSK);
7073                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7074                 phymode = MODE_IEEE80211A;
7075                 break;
7076
7077         default:
7078                 IWL_WARNING("Invalid scan band count\n");
7079                 goto done;
7080         }
7081
7082         /* select Rx chains */
7083
7084         /* Force use of chains B and C (0x6) for scan Rx.
7085          * Avoid A (0x1) because of its off-channel reception on A-band.
7086          * MIMO is not used here, but value is required to make uCode happy. */
7087         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7088                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7089                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7090                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7091
7092         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7093                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7094
7095         if (direct_mask)
7096                 IWL_DEBUG_SCAN
7097                     ("Initiating direct scan for %s.\n",
7098                      iwl4965_escape_essid(priv->essid, priv->essid_len));
7099         else
7100                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7101
7102         scan->channel_count =
7103                 iwl4965_get_channels_for_scan(
7104                         priv, phymode, 1, /* active */
7105                         direct_mask,
7106                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7107
7108         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7109             scan->channel_count * sizeof(struct iwl4965_scan_channel);
7110         cmd.data = scan;
7111         scan->len = cpu_to_le16(cmd.len);
7112
7113         set_bit(STATUS_SCAN_HW, &priv->status);
7114         rc = iwl4965_send_cmd_sync(priv, &cmd);
7115         if (rc)
7116                 goto done;
7117
7118         queue_delayed_work(priv->workqueue, &priv->scan_check,
7119                            IWL_SCAN_CHECK_WATCHDOG);
7120
7121         mutex_unlock(&priv->mutex);
7122         return;
7123
7124  done:
7125         /* inform mac80211 scan aborted */
7126         queue_work(priv->workqueue, &priv->scan_completed);
7127         mutex_unlock(&priv->mutex);
7128 }
7129
7130 static void iwl4965_bg_up(struct work_struct *data)
7131 {
7132         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, up);
7133
7134         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7135                 return;
7136
7137         mutex_lock(&priv->mutex);
7138         __iwl4965_up(priv);
7139         mutex_unlock(&priv->mutex);
7140 }
7141
7142 static void iwl4965_bg_restart(struct work_struct *data)
7143 {
7144         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, restart);
7145
7146         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7147                 return;
7148
7149         iwl4965_down(priv);
7150         queue_work(priv->workqueue, &priv->up);
7151 }
7152
7153 static void iwl4965_bg_rx_replenish(struct work_struct *data)
7154 {
7155         struct iwl4965_priv *priv =
7156             container_of(data, struct iwl4965_priv, rx_replenish);
7157
7158         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7159                 return;
7160
7161         mutex_lock(&priv->mutex);
7162         iwl4965_rx_replenish(priv);
7163         mutex_unlock(&priv->mutex);
7164 }
7165
7166 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7167
7168 static void iwl4965_bg_post_associate(struct work_struct *data)
7169 {
7170         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv,
7171                                              post_associate.work);
7172
7173         int rc = 0;
7174         struct ieee80211_conf *conf = NULL;
7175         DECLARE_MAC_BUF(mac);
7176
7177         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7178                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7179                 return;
7180         }
7181
7182         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7183                         priv->assoc_id,
7184                         print_mac(mac, priv->active_rxon.bssid_addr));
7185
7186
7187         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7188                 return;
7189
7190         mutex_lock(&priv->mutex);
7191
7192         if (!priv->vif || !priv->is_open) {
7193                 mutex_unlock(&priv->mutex);
7194                 return;
7195         }
7196         iwl4965_scan_cancel_timeout(priv, 200);
7197
7198         conf = ieee80211_get_hw_conf(priv->hw);
7199
7200         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7201         iwl4965_commit_rxon(priv);
7202
7203         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7204         iwl4965_setup_rxon_timing(priv);
7205         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7206                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7207         if (rc)
7208                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7209                             "Attempting to continue.\n");
7210
7211         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7212
7213 #ifdef CONFIG_IWL4965_HT
7214         if (priv->current_ht_config.is_ht)
7215                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
7216 #endif /* CONFIG_IWL4965_HT*/
7217         iwl4965_set_rxon_chain(priv);
7218         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7219
7220         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7221                         priv->assoc_id, priv->beacon_int);
7222
7223         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7224                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7225         else
7226                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7227
7228         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7229                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7230                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7231                 else
7232                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7233
7234                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7235                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7236
7237         }
7238
7239         iwl4965_commit_rxon(priv);
7240
7241         switch (priv->iw_mode) {
7242         case IEEE80211_IF_TYPE_STA:
7243                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
7244                 break;
7245
7246         case IEEE80211_IF_TYPE_IBSS:
7247
7248                 /* clear out the station table */
7249                 iwl4965_clear_stations_table(priv);
7250
7251                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7252                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
7253                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
7254                 iwl4965_send_beacon_cmd(priv);
7255
7256                 break;
7257
7258         default:
7259                 IWL_ERROR("%s Should not be called in %d mode\n",
7260                                 __FUNCTION__, priv->iw_mode);
7261                 break;
7262         }
7263
7264         iwl4965_sequence_reset(priv);
7265
7266 #ifdef CONFIG_IWL4965_SENSITIVITY
7267         /* Enable Rx differential gain and sensitivity calibrations */
7268         iwl4965_chain_noise_reset(priv);
7269         priv->start_calib = 1;
7270 #endif /* CONFIG_IWL4965_SENSITIVITY */
7271
7272         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7273                 priv->assoc_station_added = 1;
7274
7275 #ifdef CONFIG_IWL4965_QOS
7276         iwl4965_activate_qos(priv, 0);
7277 #endif /* CONFIG_IWL4965_QOS */
7278         /* we have just associated, don't start scan too early */
7279         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
7280         mutex_unlock(&priv->mutex);
7281 }
7282
7283 static void iwl4965_bg_abort_scan(struct work_struct *work)
7284 {
7285         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, abort_scan);
7286
7287         if (!iwl4965_is_ready(priv))
7288                 return;
7289
7290         mutex_lock(&priv->mutex);
7291
7292         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7293         iwl4965_send_scan_abort(priv);
7294
7295         mutex_unlock(&priv->mutex);
7296 }
7297
7298 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
7299
7300 static void iwl4965_bg_scan_completed(struct work_struct *work)
7301 {
7302         struct iwl4965_priv *priv =
7303             container_of(work, struct iwl4965_priv, scan_completed);
7304
7305         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7306
7307         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7308                 return;
7309
7310         if (test_bit(STATUS_CONF_PENDING, &priv->status))
7311                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
7312
7313         ieee80211_scan_completed(priv->hw);
7314
7315         /* Since setting the TXPOWER may have been deferred while
7316          * performing the scan, fire one off */
7317         mutex_lock(&priv->mutex);
7318         iwl4965_hw_reg_send_txpower(priv);
7319         mutex_unlock(&priv->mutex);
7320 }
7321
7322 /*****************************************************************************
7323  *
7324  * mac80211 entry point functions
7325  *
7326  *****************************************************************************/
7327
7328 #define UCODE_READY_TIMEOUT     (2 * HZ)
7329
7330 static int iwl4965_mac_start(struct ieee80211_hw *hw)
7331 {
7332         struct iwl4965_priv *priv = hw->priv;
7333         int ret;
7334
7335         IWL_DEBUG_MAC80211("enter\n");
7336
7337         if (pci_enable_device(priv->pci_dev)) {
7338                 IWL_ERROR("Fail to pci_enable_device\n");
7339                 return -ENODEV;
7340         }
7341         pci_restore_state(priv->pci_dev);
7342         pci_enable_msi(priv->pci_dev);
7343
7344         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
7345                           DRV_NAME, priv);
7346         if (ret) {
7347                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
7348                 goto out_disable_msi;
7349         }
7350
7351         /* we should be verifying the device is ready to be opened */
7352         mutex_lock(&priv->mutex);
7353
7354         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
7355         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
7356          * ucode filename and max sizes are card-specific. */
7357
7358         if (!priv->ucode_code.len) {
7359                 ret = iwl4965_read_ucode(priv);
7360                 if (ret) {
7361                         IWL_ERROR("Could not read microcode: %d\n", ret);
7362                         mutex_unlock(&priv->mutex);
7363                         goto out_release_irq;
7364                 }
7365         }
7366
7367         ret = __iwl4965_up(priv);
7368
7369         mutex_unlock(&priv->mutex);
7370
7371         if (ret)
7372                 goto out_release_irq;
7373
7374         IWL_DEBUG_INFO("Start UP work done.\n");
7375
7376         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
7377                 return 0;
7378
7379         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
7380          * mac80211 will not be run successfully. */
7381         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
7382                         test_bit(STATUS_READY, &priv->status),
7383                         UCODE_READY_TIMEOUT);
7384         if (!ret) {
7385                 if (!test_bit(STATUS_READY, &priv->status)) {
7386                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
7387                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
7388                         ret = -ETIMEDOUT;
7389                         goto out_release_irq;
7390                 }
7391         }
7392
7393         priv->is_open = 1;
7394         IWL_DEBUG_MAC80211("leave\n");
7395         return 0;
7396
7397 out_release_irq:
7398         free_irq(priv->pci_dev->irq, priv);
7399 out_disable_msi:
7400         pci_disable_msi(priv->pci_dev);
7401         pci_disable_device(priv->pci_dev);
7402         priv->is_open = 0;
7403         IWL_DEBUG_MAC80211("leave - failed\n");
7404         return ret;
7405 }
7406
7407 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
7408 {
7409         struct iwl4965_priv *priv = hw->priv;
7410
7411         IWL_DEBUG_MAC80211("enter\n");
7412
7413         if (!priv->is_open) {
7414                 IWL_DEBUG_MAC80211("leave - skip\n");
7415                 return;
7416         }
7417
7418         priv->is_open = 0;
7419
7420         if (iwl4965_is_ready_rf(priv)) {
7421                 /* stop mac, cancel any scan request and clear
7422                  * RXON_FILTER_ASSOC_MSK BIT
7423                  */
7424                 mutex_lock(&priv->mutex);
7425                 iwl4965_scan_cancel_timeout(priv, 100);
7426                 cancel_delayed_work(&priv->post_associate);
7427                 mutex_unlock(&priv->mutex);
7428         }
7429
7430         iwl4965_down(priv);
7431
7432         flush_workqueue(priv->workqueue);
7433         free_irq(priv->pci_dev->irq, priv);
7434         pci_disable_msi(priv->pci_dev);
7435         pci_save_state(priv->pci_dev);
7436         pci_disable_device(priv->pci_dev);
7437
7438         IWL_DEBUG_MAC80211("leave\n");
7439 }
7440
7441 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7442                       struct ieee80211_tx_control *ctl)
7443 {
7444         struct iwl4965_priv *priv = hw->priv;
7445
7446         IWL_DEBUG_MAC80211("enter\n");
7447
7448         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7449                 IWL_DEBUG_MAC80211("leave - monitor\n");
7450                 return -1;
7451         }
7452
7453         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7454                      ctl->tx_rate);
7455
7456         if (iwl4965_tx_skb(priv, skb, ctl))
7457                 dev_kfree_skb_any(skb);
7458
7459         IWL_DEBUG_MAC80211("leave\n");
7460         return 0;
7461 }
7462
7463 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
7464                                  struct ieee80211_if_init_conf *conf)
7465 {
7466         struct iwl4965_priv *priv = hw->priv;
7467         unsigned long flags;
7468         DECLARE_MAC_BUF(mac);
7469
7470         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7471
7472         if (priv->vif) {
7473                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7474                 return -EOPNOTSUPP;
7475         }
7476
7477         spin_lock_irqsave(&priv->lock, flags);
7478         priv->vif = conf->vif;
7479
7480         spin_unlock_irqrestore(&priv->lock, flags);
7481
7482         mutex_lock(&priv->mutex);
7483
7484         if (conf->mac_addr) {
7485                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7486                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7487         }
7488
7489         if (iwl4965_is_ready(priv))
7490                 iwl4965_set_mode(priv, conf->type);
7491
7492         mutex_unlock(&priv->mutex);
7493
7494         IWL_DEBUG_MAC80211("leave\n");
7495         return 0;
7496 }
7497
7498 /**
7499  * iwl4965_mac_config - mac80211 config callback
7500  *
7501  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7502  * be set inappropriately and the driver currently sets the hardware up to
7503  * use it whenever needed.
7504  */
7505 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7506 {
7507         struct iwl4965_priv *priv = hw->priv;
7508         const struct iwl4965_channel_info *ch_info;
7509         unsigned long flags;
7510         int ret = 0;
7511
7512         mutex_lock(&priv->mutex);
7513         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7514
7515         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7516
7517         if (!iwl4965_is_ready(priv)) {
7518                 IWL_DEBUG_MAC80211("leave - not ready\n");
7519                 ret = -EIO;
7520                 goto out;
7521         }
7522
7523         if (unlikely(!iwl4965_param_disable_hw_scan &&
7524                      test_bit(STATUS_SCANNING, &priv->status))) {
7525                 IWL_DEBUG_MAC80211("leave - scanning\n");
7526                 set_bit(STATUS_CONF_PENDING, &priv->status);
7527                 mutex_unlock(&priv->mutex);
7528                 return 0;
7529         }
7530
7531         spin_lock_irqsave(&priv->lock, flags);
7532
7533         ch_info = iwl4965_get_channel_info(priv, conf->phymode, conf->channel);
7534         if (!is_channel_valid(ch_info)) {
7535                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7536                                conf->channel, conf->phymode);
7537                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7538                 spin_unlock_irqrestore(&priv->lock, flags);
7539                 ret = -EINVAL;
7540                 goto out;
7541         }
7542
7543 #ifdef CONFIG_IWL4965_HT
7544         /* if we are switching fron ht to 2.4 clear flags
7545          * from any ht related info since 2.4 does not
7546          * support ht */
7547         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7548 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7549             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7550 #endif
7551         )
7552                 priv->staging_rxon.flags = 0;
7553 #endif /* CONFIG_IWL4965_HT */
7554
7555         iwl4965_set_rxon_channel(priv, conf->phymode, conf->channel);
7556
7557         iwl4965_set_flags_for_phymode(priv, conf->phymode);
7558
7559         /* The list of supported rates and rate mask can be different
7560          * for each phymode; since the phymode may have changed, reset
7561          * the rate mask to what mac80211 lists */
7562         iwl4965_set_rate(priv);
7563
7564         spin_unlock_irqrestore(&priv->lock, flags);
7565
7566 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7567         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7568                 iwl4965_hw_channel_switch(priv, conf->channel);
7569                 goto out;
7570         }
7571 #endif
7572
7573         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
7574
7575         if (!conf->radio_enabled) {
7576                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7577                 goto out;
7578         }
7579
7580         if (iwl4965_is_rfkill(priv)) {
7581                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7582                 ret = -EIO;
7583                 goto out;
7584         }
7585
7586         iwl4965_set_rate(priv);
7587
7588         if (memcmp(&priv->active_rxon,
7589                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7590                 iwl4965_commit_rxon(priv);
7591         else
7592                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7593
7594         IWL_DEBUG_MAC80211("leave\n");
7595
7596 out:
7597         clear_bit(STATUS_CONF_PENDING, &priv->status);
7598         mutex_unlock(&priv->mutex);
7599         return ret;
7600 }
7601
7602 static void iwl4965_config_ap(struct iwl4965_priv *priv)
7603 {
7604         int rc = 0;
7605
7606         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7607                 return;
7608
7609         /* The following should be done only at AP bring up */
7610         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7611
7612                 /* RXON - unassoc (to set timing command) */
7613                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7614                 iwl4965_commit_rxon(priv);
7615
7616                 /* RXON Timing */
7617                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7618                 iwl4965_setup_rxon_timing(priv);
7619                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7620                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7621                 if (rc)
7622                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7623                                         "Attempting to continue.\n");
7624
7625                 iwl4965_set_rxon_chain(priv);
7626
7627                 /* FIXME: what should be the assoc_id for AP? */
7628                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7629                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7630                         priv->staging_rxon.flags |=
7631                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7632                 else
7633                         priv->staging_rxon.flags &=
7634                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7635
7636                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7637                         if (priv->assoc_capability &
7638                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7639                                 priv->staging_rxon.flags |=
7640                                         RXON_FLG_SHORT_SLOT_MSK;
7641                         else
7642                                 priv->staging_rxon.flags &=
7643                                         ~RXON_FLG_SHORT_SLOT_MSK;
7644
7645                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7646                                 priv->staging_rxon.flags &=
7647                                         ~RXON_FLG_SHORT_SLOT_MSK;
7648                 }
7649                 /* restore RXON assoc */
7650                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7651                 iwl4965_commit_rxon(priv);
7652 #ifdef CONFIG_IWL4965_QOS
7653                 iwl4965_activate_qos(priv, 1);
7654 #endif
7655                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7656         }
7657         iwl4965_send_beacon_cmd(priv);
7658
7659         /* FIXME - we need to add code here to detect a totally new
7660          * configuration, reset the AP, unassoc, rxon timing, assoc,
7661          * clear sta table, add BCAST sta... */
7662 }
7663
7664 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
7665                                         struct ieee80211_vif *vif,
7666                                     struct ieee80211_if_conf *conf)
7667 {
7668         struct iwl4965_priv *priv = hw->priv;
7669         DECLARE_MAC_BUF(mac);
7670         unsigned long flags;
7671         int rc;
7672
7673         if (conf == NULL)
7674                 return -EIO;
7675
7676         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7677             (!conf->beacon || !conf->ssid_len)) {
7678                 IWL_DEBUG_MAC80211
7679                     ("Leaving in AP mode because HostAPD is not ready.\n");
7680                 return 0;
7681         }
7682
7683         if (!iwl4965_is_alive(priv))
7684                 return -EAGAIN;
7685
7686         mutex_lock(&priv->mutex);
7687
7688         if (conf->bssid)
7689                 IWL_DEBUG_MAC80211("bssid: %s\n",
7690                                    print_mac(mac, conf->bssid));
7691
7692 /*
7693  * very dubious code was here; the probe filtering flag is never set:
7694  *
7695         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7696             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7697  */
7698         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7699                 IWL_DEBUG_MAC80211("leave - scanning\n");
7700                 mutex_unlock(&priv->mutex);
7701                 return 0;
7702         }
7703
7704         if (priv->vif != vif) {
7705                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7706                 mutex_unlock(&priv->mutex);
7707                 return 0;
7708         }
7709
7710         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7711                 if (!conf->bssid) {
7712                         conf->bssid = priv->mac_addr;
7713                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7714                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7715                                            print_mac(mac, conf->bssid));
7716                 }
7717                 if (priv->ibss_beacon)
7718                         dev_kfree_skb(priv->ibss_beacon);
7719
7720                 priv->ibss_beacon = conf->beacon;
7721         }
7722
7723         if (iwl4965_is_rfkill(priv))
7724                 goto done;
7725
7726         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7727             !is_multicast_ether_addr(conf->bssid)) {
7728                 /* If there is currently a HW scan going on in the background
7729                  * then we need to cancel it else the RXON below will fail. */
7730                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7731                         IWL_WARNING("Aborted scan still in progress "
7732                                     "after 100ms\n");
7733                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7734                         mutex_unlock(&priv->mutex);
7735                         return -EAGAIN;
7736                 }
7737                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7738
7739                 /* TODO: Audit driver for usage of these members and see
7740                  * if mac80211 deprecates them (priv->bssid looks like it
7741                  * shouldn't be there, but I haven't scanned the IBSS code
7742                  * to verify) - jpk */
7743                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7744
7745                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7746                         iwl4965_config_ap(priv);
7747                 else {
7748                         rc = iwl4965_commit_rxon(priv);
7749                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7750                                 iwl4965_rxon_add_station(
7751                                         priv, priv->active_rxon.bssid_addr, 1);
7752                 }
7753
7754         } else {
7755                 iwl4965_scan_cancel_timeout(priv, 100);
7756                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7757                 iwl4965_commit_rxon(priv);
7758         }
7759
7760  done:
7761         spin_lock_irqsave(&priv->lock, flags);
7762         if (!conf->ssid_len)
7763                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7764         else
7765                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7766
7767         priv->essid_len = conf->ssid_len;
7768         spin_unlock_irqrestore(&priv->lock, flags);
7769
7770         IWL_DEBUG_MAC80211("leave\n");
7771         mutex_unlock(&priv->mutex);
7772
7773         return 0;
7774 }
7775
7776 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7777                                  unsigned int changed_flags,
7778                                  unsigned int *total_flags,
7779                                  int mc_count, struct dev_addr_list *mc_list)
7780 {
7781         /*
7782          * XXX: dummy
7783          * see also iwl4965_connection_init_rx_config
7784          */
7785         *total_flags = 0;
7786 }
7787
7788 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7789                                      struct ieee80211_if_init_conf *conf)
7790 {
7791         struct iwl4965_priv *priv = hw->priv;
7792
7793         IWL_DEBUG_MAC80211("enter\n");
7794
7795         mutex_lock(&priv->mutex);
7796
7797         if (iwl4965_is_ready_rf(priv)) {
7798                 iwl4965_scan_cancel_timeout(priv, 100);
7799                 cancel_delayed_work(&priv->post_associate);
7800                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7801                 iwl4965_commit_rxon(priv);
7802         }
7803         if (priv->vif == conf->vif) {
7804                 priv->vif = NULL;
7805                 memset(priv->bssid, 0, ETH_ALEN);
7806                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7807                 priv->essid_len = 0;
7808         }
7809         mutex_unlock(&priv->mutex);
7810
7811         IWL_DEBUG_MAC80211("leave\n");
7812
7813 }
7814
7815 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7816                                      struct ieee80211_vif *vif,
7817                                      struct ieee80211_bss_conf *bss_conf,
7818                                      u32 changes)
7819 {
7820         struct iwl4965_priv *priv = hw->priv;
7821
7822         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7823                 if (bss_conf->use_short_preamble)
7824                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7825                 else
7826                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7827         }
7828
7829         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7830                 if (bss_conf->use_cts_prot && (priv->phymode != MODE_IEEE80211A))
7831                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7832                 else
7833                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7834         }
7835
7836         if (changes & BSS_CHANGED_ASSOC) {
7837                 /*
7838                  * TODO:
7839                  * do stuff instead of sniffing assoc resp
7840                  */
7841         }
7842
7843         if (iwl4965_is_associated(priv))
7844                 iwl4965_send_rxon_assoc(priv);
7845 }
7846
7847 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7848 {
7849         int rc = 0;
7850         unsigned long flags;
7851         struct iwl4965_priv *priv = hw->priv;
7852
7853         IWL_DEBUG_MAC80211("enter\n");
7854
7855         mutex_lock(&priv->mutex);
7856         spin_lock_irqsave(&priv->lock, flags);
7857
7858         if (!iwl4965_is_ready_rf(priv)) {
7859                 rc = -EIO;
7860                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7861                 goto out_unlock;
7862         }
7863
7864         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7865                 rc = -EIO;
7866                 IWL_ERROR("ERROR: APs don't scan\n");
7867                 goto out_unlock;
7868         }
7869
7870         /* we don't schedule scan within next_scan_jiffies period */
7871         if (priv->next_scan_jiffies &&
7872                         time_after(priv->next_scan_jiffies, jiffies)) {
7873                 rc = -EAGAIN;
7874                 goto out_unlock;
7875         }
7876         /* if we just finished scan ask for delay */
7877         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7878                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7879                 rc = -EAGAIN;
7880                 goto out_unlock;
7881         }
7882         if (len) {
7883                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7884                                iwl4965_escape_essid(ssid, len), (int)len);
7885
7886                 priv->one_direct_scan = 1;
7887                 priv->direct_ssid_len = (u8)
7888                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7889                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7890         } else
7891                 priv->one_direct_scan = 0;
7892
7893         rc = iwl4965_scan_initiate(priv);
7894
7895         IWL_DEBUG_MAC80211("leave\n");
7896
7897 out_unlock:
7898         spin_unlock_irqrestore(&priv->lock, flags);
7899         mutex_unlock(&priv->mutex);
7900
7901         return rc;
7902 }
7903
7904 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7905                            const u8 *local_addr, const u8 *addr,
7906                            struct ieee80211_key_conf *key)
7907 {
7908         struct iwl4965_priv *priv = hw->priv;
7909         DECLARE_MAC_BUF(mac);
7910         int rc = 0;
7911         u8 sta_id;
7912
7913         IWL_DEBUG_MAC80211("enter\n");
7914
7915         if (!iwl4965_param_hwcrypto) {
7916                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7917                 return -EOPNOTSUPP;
7918         }
7919
7920         if (is_zero_ether_addr(addr))
7921                 /* only support pairwise keys */
7922                 return -EOPNOTSUPP;
7923
7924         sta_id = iwl4965_hw_find_station(priv, addr);
7925         if (sta_id == IWL_INVALID_STATION) {
7926                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7927                                    print_mac(mac, addr));
7928                 return -EINVAL;
7929         }
7930
7931         mutex_lock(&priv->mutex);
7932
7933         iwl4965_scan_cancel_timeout(priv, 100);
7934
7935         switch (cmd) {
7936         case  SET_KEY:
7937                 rc = iwl4965_update_sta_key_info(priv, key, sta_id);
7938                 if (!rc) {
7939                         iwl4965_set_rxon_hwcrypto(priv, 1);
7940                         iwl4965_commit_rxon(priv);
7941                         key->hw_key_idx = sta_id;
7942                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7943                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7944                 }
7945                 break;
7946         case DISABLE_KEY:
7947                 rc = iwl4965_clear_sta_key_info(priv, sta_id);
7948                 if (!rc) {
7949                         iwl4965_set_rxon_hwcrypto(priv, 0);
7950                         iwl4965_commit_rxon(priv);
7951                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7952                 }
7953                 break;
7954         default:
7955                 rc = -EINVAL;
7956         }
7957
7958         IWL_DEBUG_MAC80211("leave\n");
7959         mutex_unlock(&priv->mutex);
7960
7961         return rc;
7962 }
7963
7964 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7965                            const struct ieee80211_tx_queue_params *params)
7966 {
7967         struct iwl4965_priv *priv = hw->priv;
7968 #ifdef CONFIG_IWL4965_QOS
7969         unsigned long flags;
7970         int q;
7971 #endif /* CONFIG_IWL4965_QOS */
7972
7973         IWL_DEBUG_MAC80211("enter\n");
7974
7975         if (!iwl4965_is_ready_rf(priv)) {
7976                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7977                 return -EIO;
7978         }
7979
7980         if (queue >= AC_NUM) {
7981                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7982                 return 0;
7983         }
7984
7985 #ifdef CONFIG_IWL4965_QOS
7986         if (!priv->qos_data.qos_enable) {
7987                 priv->qos_data.qos_active = 0;
7988                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7989                 return 0;
7990         }
7991         q = AC_NUM - 1 - queue;
7992
7993         spin_lock_irqsave(&priv->lock, flags);
7994
7995         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7996         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7997         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7998         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7999                         cpu_to_le16((params->burst_time * 100));
8000
8001         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
8002         priv->qos_data.qos_active = 1;
8003
8004         spin_unlock_irqrestore(&priv->lock, flags);
8005
8006         mutex_lock(&priv->mutex);
8007         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
8008                 iwl4965_activate_qos(priv, 1);
8009         else if (priv->assoc_id && iwl4965_is_associated(priv))
8010                 iwl4965_activate_qos(priv, 0);
8011
8012         mutex_unlock(&priv->mutex);
8013
8014 #endif /*CONFIG_IWL4965_QOS */
8015
8016         IWL_DEBUG_MAC80211("leave\n");
8017         return 0;
8018 }
8019
8020 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
8021                                 struct ieee80211_tx_queue_stats *stats)
8022 {
8023         struct iwl4965_priv *priv = hw->priv;
8024         int i, avail;
8025         struct iwl4965_tx_queue *txq;
8026         struct iwl4965_queue *q;
8027         unsigned long flags;
8028
8029         IWL_DEBUG_MAC80211("enter\n");
8030
8031         if (!iwl4965_is_ready_rf(priv)) {
8032                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8033                 return -EIO;
8034         }
8035
8036         spin_lock_irqsave(&priv->lock, flags);
8037
8038         for (i = 0; i < AC_NUM; i++) {
8039                 txq = &priv->txq[i];
8040                 q = &txq->q;
8041                 avail = iwl4965_queue_space(q);
8042
8043                 stats->data[i].len = q->n_window - avail;
8044                 stats->data[i].limit = q->n_window - q->high_mark;
8045                 stats->data[i].count = q->n_window;
8046
8047         }
8048         spin_unlock_irqrestore(&priv->lock, flags);
8049
8050         IWL_DEBUG_MAC80211("leave\n");
8051
8052         return 0;
8053 }
8054
8055 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
8056                              struct ieee80211_low_level_stats *stats)
8057 {
8058         IWL_DEBUG_MAC80211("enter\n");
8059         IWL_DEBUG_MAC80211("leave\n");
8060
8061         return 0;
8062 }
8063
8064 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
8065 {
8066         IWL_DEBUG_MAC80211("enter\n");
8067         IWL_DEBUG_MAC80211("leave\n");
8068
8069         return 0;
8070 }
8071
8072 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
8073 {
8074         struct iwl4965_priv *priv = hw->priv;
8075         unsigned long flags;
8076
8077         mutex_lock(&priv->mutex);
8078         IWL_DEBUG_MAC80211("enter\n");
8079
8080         priv->lq_mngr.lq_ready = 0;
8081 #ifdef CONFIG_IWL4965_HT
8082         spin_lock_irqsave(&priv->lock, flags);
8083         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
8084         spin_unlock_irqrestore(&priv->lock, flags);
8085 #ifdef CONFIG_IWL4965_HT_AGG
8086 /*      if (priv->lq_mngr.agg_ctrl.granted_ba)
8087                 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
8088
8089         memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl4965_agg_control));
8090         priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
8091         priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
8092         priv->lq_mngr.agg_ctrl.auto_agg = 1;
8093
8094         if (priv->lq_mngr.agg_ctrl.auto_agg)
8095                 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
8096 #endif /*CONFIG_IWL4965_HT_AGG */
8097 #endif /* CONFIG_IWL4965_HT */
8098
8099 #ifdef CONFIG_IWL4965_QOS
8100         iwl4965_reset_qos(priv);
8101 #endif
8102
8103         cancel_delayed_work(&priv->post_associate);
8104
8105         spin_lock_irqsave(&priv->lock, flags);
8106         priv->assoc_id = 0;
8107         priv->assoc_capability = 0;
8108         priv->call_post_assoc_from_beacon = 0;
8109         priv->assoc_station_added = 0;
8110
8111         /* new association get rid of ibss beacon skb */
8112         if (priv->ibss_beacon)
8113                 dev_kfree_skb(priv->ibss_beacon);
8114
8115         priv->ibss_beacon = NULL;
8116
8117         priv->beacon_int = priv->hw->conf.beacon_int;
8118         priv->timestamp1 = 0;
8119         priv->timestamp0 = 0;
8120         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
8121                 priv->beacon_int = 0;
8122
8123         spin_unlock_irqrestore(&priv->lock, flags);
8124
8125         if (!iwl4965_is_ready_rf(priv)) {
8126                 IWL_DEBUG_MAC80211("leave - not ready\n");
8127                 mutex_unlock(&priv->mutex);
8128                 return;
8129         }
8130
8131         /* we are restarting association process
8132          * clear RXON_FILTER_ASSOC_MSK bit
8133          */
8134         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
8135                 iwl4965_scan_cancel_timeout(priv, 100);
8136                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
8137                 iwl4965_commit_rxon(priv);
8138         }
8139
8140         /* Per mac80211.h: This is only used in IBSS mode... */
8141         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8142
8143                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
8144                 mutex_unlock(&priv->mutex);
8145                 return;
8146         }
8147
8148         priv->only_active_channel = 0;
8149
8150         iwl4965_set_rate(priv);
8151
8152         mutex_unlock(&priv->mutex);
8153
8154         IWL_DEBUG_MAC80211("leave\n");
8155 }
8156
8157 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
8158                                  struct ieee80211_tx_control *control)
8159 {
8160         struct iwl4965_priv *priv = hw->priv;
8161         unsigned long flags;
8162
8163         mutex_lock(&priv->mutex);
8164         IWL_DEBUG_MAC80211("enter\n");
8165
8166         if (!iwl4965_is_ready_rf(priv)) {
8167                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8168                 mutex_unlock(&priv->mutex);
8169                 return -EIO;
8170         }
8171
8172         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8173                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8174                 mutex_unlock(&priv->mutex);
8175                 return -EIO;
8176         }
8177
8178         spin_lock_irqsave(&priv->lock, flags);
8179
8180         if (priv->ibss_beacon)
8181                 dev_kfree_skb(priv->ibss_beacon);
8182
8183         priv->ibss_beacon = skb;
8184
8185         priv->assoc_id = 0;
8186
8187         IWL_DEBUG_MAC80211("leave\n");
8188         spin_unlock_irqrestore(&priv->lock, flags);
8189
8190 #ifdef CONFIG_IWL4965_QOS
8191         iwl4965_reset_qos(priv);
8192 #endif
8193
8194         queue_work(priv->workqueue, &priv->post_associate.work);
8195
8196         mutex_unlock(&priv->mutex);
8197
8198         return 0;
8199 }
8200
8201 #ifdef CONFIG_IWL4965_HT
8202
8203 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
8204                                  struct iwl4965_priv *priv)
8205 {
8206         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
8207         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
8208         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
8209
8210         IWL_DEBUG_MAC80211("enter: \n");
8211
8212         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
8213                 iwl_conf->is_ht = 0;
8214                 return;
8215         }
8216
8217         iwl_conf->is_ht = 1;
8218         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8219
8220         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
8221                 iwl_conf->sgf |= 0x1;
8222         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
8223                 iwl_conf->sgf |= 0x2;
8224
8225         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
8226         iwl_conf->max_amsdu_size =
8227                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
8228         iwl_conf->supported_chan_width =
8229                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
8230         iwl_conf->tx_mimo_ps_mode =
8231                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8232         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
8233
8234         iwl_conf->control_channel = ht_bss_conf->primary_channel;
8235         iwl_conf->extension_chan_offset =
8236                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
8237         iwl_conf->tx_chan_width =
8238                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
8239         iwl_conf->ht_protection =
8240                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
8241         iwl_conf->non_GF_STA_present =
8242                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
8243
8244         IWL_DEBUG_MAC80211("control channel %d\n",
8245                 iwl_conf->control_channel);
8246         IWL_DEBUG_MAC80211("leave\n");
8247 }
8248
8249 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
8250                                struct ieee80211_conf *conf)
8251 {
8252         struct iwl4965_priv *priv = hw->priv;
8253
8254         IWL_DEBUG_MAC80211("enter: \n");
8255
8256         iwl4965_ht_info_fill(conf, priv);
8257         iwl4965_set_rxon_chain(priv);
8258
8259         if (priv && priv->assoc_id &&
8260             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8261                 unsigned long flags;
8262
8263                 spin_lock_irqsave(&priv->lock, flags);
8264                 if (priv->beacon_int)
8265                         queue_work(priv->workqueue, &priv->post_associate.work);
8266                 else
8267                         priv->call_post_assoc_from_beacon = 1;
8268                 spin_unlock_irqrestore(&priv->lock, flags);
8269         }
8270
8271         IWL_DEBUG_MAC80211("leave:\n");
8272         return 0;
8273 }
8274
8275 static void iwl4965_set_ht_capab(struct ieee80211_hw *hw,
8276                         struct ieee80211_ht_cap *ht_cap,
8277                         u8 use_current_config)
8278 {
8279         struct ieee80211_conf *conf = &hw->conf;
8280         struct ieee80211_hw_mode *mode = conf->mode;
8281
8282         if (use_current_config) {
8283                 ht_cap->cap_info = cpu_to_le16(conf->ht_conf.cap);
8284                 memcpy(ht_cap->supp_mcs_set,
8285                                 conf->ht_conf.supp_mcs_set, 16);
8286         } else {
8287                 ht_cap->cap_info = cpu_to_le16(mode->ht_info.cap);
8288                 memcpy(ht_cap->supp_mcs_set,
8289                                 mode->ht_info.supp_mcs_set, 16);
8290         }
8291         ht_cap->ampdu_params_info =
8292                 (mode->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
8293                 ((mode->ht_info.ampdu_density << 2) &
8294                                         IEEE80211_HT_CAP_AMPDU_DENSITY);
8295 }
8296
8297 #endif /*CONFIG_IWL4965_HT*/
8298
8299 /*****************************************************************************
8300  *
8301  * sysfs attributes
8302  *
8303  *****************************************************************************/
8304
8305 #ifdef CONFIG_IWL4965_DEBUG
8306
8307 /*
8308  * The following adds a new attribute to the sysfs representation
8309  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8310  * used for controlling the debug level.
8311  *
8312  * See the level definitions in iwl for details.
8313  */
8314
8315 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8316 {
8317         return sprintf(buf, "0x%08X\n", iwl4965_debug_level);
8318 }
8319 static ssize_t store_debug_level(struct device_driver *d,
8320                                  const char *buf, size_t count)
8321 {
8322         char *p = (char *)buf;
8323         u32 val;
8324
8325         val = simple_strtoul(p, &p, 0);
8326         if (p == buf)
8327                 printk(KERN_INFO DRV_NAME
8328                        ": %s is not in hex or decimal form.\n", buf);
8329         else
8330                 iwl4965_debug_level = val;
8331
8332         return strnlen(buf, count);
8333 }
8334
8335 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8336                    show_debug_level, store_debug_level);
8337
8338 #endif /* CONFIG_IWL4965_DEBUG */
8339
8340 static ssize_t show_rf_kill(struct device *d,
8341                             struct device_attribute *attr, char *buf)
8342 {
8343         /*
8344          * 0 - RF kill not enabled
8345          * 1 - SW based RF kill active (sysfs)
8346          * 2 - HW based RF kill active
8347          * 3 - Both HW and SW based RF kill active
8348          */
8349         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8350         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8351                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8352
8353         return sprintf(buf, "%i\n", val);
8354 }
8355
8356 static ssize_t store_rf_kill(struct device *d,
8357                              struct device_attribute *attr,
8358                              const char *buf, size_t count)
8359 {
8360         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8361
8362         mutex_lock(&priv->mutex);
8363         iwl4965_radio_kill_sw(priv, buf[0] == '1');
8364         mutex_unlock(&priv->mutex);
8365
8366         return count;
8367 }
8368
8369 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8370
8371 static ssize_t show_temperature(struct device *d,
8372                                 struct device_attribute *attr, char *buf)
8373 {
8374         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8375
8376         if (!iwl4965_is_alive(priv))
8377                 return -EAGAIN;
8378
8379         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
8380 }
8381
8382 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8383
8384 static ssize_t show_rs_window(struct device *d,
8385                               struct device_attribute *attr,
8386                               char *buf)
8387 {
8388         struct iwl4965_priv *priv = d->driver_data;
8389         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8390 }
8391 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8392
8393 static ssize_t show_tx_power(struct device *d,
8394                              struct device_attribute *attr, char *buf)
8395 {
8396         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8397         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8398 }
8399
8400 static ssize_t store_tx_power(struct device *d,
8401                               struct device_attribute *attr,
8402                               const char *buf, size_t count)
8403 {
8404         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8405         char *p = (char *)buf;
8406         u32 val;
8407
8408         val = simple_strtoul(p, &p, 10);
8409         if (p == buf)
8410                 printk(KERN_INFO DRV_NAME
8411                        ": %s is not in decimal form.\n", buf);
8412         else
8413                 iwl4965_hw_reg_set_txpower(priv, val);
8414
8415         return count;
8416 }
8417
8418 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8419
8420 static ssize_t show_flags(struct device *d,
8421                           struct device_attribute *attr, char *buf)
8422 {
8423         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8424
8425         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8426 }
8427
8428 static ssize_t store_flags(struct device *d,
8429                            struct device_attribute *attr,
8430                            const char *buf, size_t count)
8431 {
8432         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8433         u32 flags = simple_strtoul(buf, NULL, 0);
8434
8435         mutex_lock(&priv->mutex);
8436         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8437                 /* Cancel any currently running scans... */
8438                 if (iwl4965_scan_cancel_timeout(priv, 100))
8439                         IWL_WARNING("Could not cancel scan.\n");
8440                 else {
8441                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8442                                        flags);
8443                         priv->staging_rxon.flags = cpu_to_le32(flags);
8444                         iwl4965_commit_rxon(priv);
8445                 }
8446         }
8447         mutex_unlock(&priv->mutex);
8448
8449         return count;
8450 }
8451
8452 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8453
8454 static ssize_t show_filter_flags(struct device *d,
8455                                  struct device_attribute *attr, char *buf)
8456 {
8457         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8458
8459         return sprintf(buf, "0x%04X\n",
8460                 le32_to_cpu(priv->active_rxon.filter_flags));
8461 }
8462
8463 static ssize_t store_filter_flags(struct device *d,
8464                                   struct device_attribute *attr,
8465                                   const char *buf, size_t count)
8466 {
8467         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8468         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8469
8470         mutex_lock(&priv->mutex);
8471         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8472                 /* Cancel any currently running scans... */
8473                 if (iwl4965_scan_cancel_timeout(priv, 100))
8474                         IWL_WARNING("Could not cancel scan.\n");
8475                 else {
8476                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8477                                        "0x%04X\n", filter_flags);
8478                         priv->staging_rxon.filter_flags =
8479                                 cpu_to_le32(filter_flags);
8480                         iwl4965_commit_rxon(priv);
8481                 }
8482         }
8483         mutex_unlock(&priv->mutex);
8484
8485         return count;
8486 }
8487
8488 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8489                    store_filter_flags);
8490
8491 static ssize_t show_tune(struct device *d,
8492                          struct device_attribute *attr, char *buf)
8493 {
8494         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8495
8496         return sprintf(buf, "0x%04X\n",
8497                        (priv->phymode << 8) |
8498                         le16_to_cpu(priv->active_rxon.channel));
8499 }
8500
8501 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode);
8502
8503 static ssize_t store_tune(struct device *d,
8504                           struct device_attribute *attr,
8505                           const char *buf, size_t count)
8506 {
8507         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8508         char *p = (char *)buf;
8509         u16 tune = simple_strtoul(p, &p, 0);
8510         u8 phymode = (tune >> 8) & 0xff;
8511         u16 channel = tune & 0xff;
8512
8513         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8514
8515         mutex_lock(&priv->mutex);
8516         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8517             (priv->phymode != phymode)) {
8518                 const struct iwl4965_channel_info *ch_info;
8519
8520                 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
8521                 if (!ch_info) {
8522                         IWL_WARNING("Requested invalid phymode/channel "
8523                                     "combination: %d %d\n", phymode, channel);
8524                         mutex_unlock(&priv->mutex);
8525                         return -EINVAL;
8526                 }
8527
8528                 /* Cancel any currently running scans... */
8529                 if (iwl4965_scan_cancel_timeout(priv, 100))
8530                         IWL_WARNING("Could not cancel scan.\n");
8531                 else {
8532                         IWL_DEBUG_INFO("Committing phymode and "
8533                                        "rxon.channel = %d %d\n",
8534                                        phymode, channel);
8535
8536                         iwl4965_set_rxon_channel(priv, phymode, channel);
8537                         iwl4965_set_flags_for_phymode(priv, phymode);
8538
8539                         iwl4965_set_rate(priv);
8540                         iwl4965_commit_rxon(priv);
8541                 }
8542         }
8543         mutex_unlock(&priv->mutex);
8544
8545         return count;
8546 }
8547
8548 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8549
8550 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8551
8552 static ssize_t show_measurement(struct device *d,
8553                                 struct device_attribute *attr, char *buf)
8554 {
8555         struct iwl4965_priv *priv = dev_get_drvdata(d);
8556         struct iwl4965_spectrum_notification measure_report;
8557         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8558         u8 *data = (u8 *) & measure_report;
8559         unsigned long flags;
8560
8561         spin_lock_irqsave(&priv->lock, flags);
8562         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8563                 spin_unlock_irqrestore(&priv->lock, flags);
8564                 return 0;
8565         }
8566         memcpy(&measure_report, &priv->measure_report, size);
8567         priv->measurement_status = 0;
8568         spin_unlock_irqrestore(&priv->lock, flags);
8569
8570         while (size && (PAGE_SIZE - len)) {
8571                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8572                                    PAGE_SIZE - len, 1);
8573                 len = strlen(buf);
8574                 if (PAGE_SIZE - len)
8575                         buf[len++] = '\n';
8576
8577                 ofs += 16;
8578                 size -= min(size, 16U);
8579         }
8580
8581         return len;
8582 }
8583
8584 static ssize_t store_measurement(struct device *d,
8585                                  struct device_attribute *attr,
8586                                  const char *buf, size_t count)
8587 {
8588         struct iwl4965_priv *priv = dev_get_drvdata(d);
8589         struct ieee80211_measurement_params params = {
8590                 .channel = le16_to_cpu(priv->active_rxon.channel),
8591                 .start_time = cpu_to_le64(priv->last_tsf),
8592                 .duration = cpu_to_le16(1),
8593         };
8594         u8 type = IWL_MEASURE_BASIC;
8595         u8 buffer[32];
8596         u8 channel;
8597
8598         if (count) {
8599                 char *p = buffer;
8600                 strncpy(buffer, buf, min(sizeof(buffer), count));
8601                 channel = simple_strtoul(p, NULL, 0);
8602                 if (channel)
8603                         params.channel = channel;
8604
8605                 p = buffer;
8606                 while (*p && *p != ' ')
8607                         p++;
8608                 if (*p)
8609                         type = simple_strtoul(p + 1, NULL, 0);
8610         }
8611
8612         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8613                        "channel %d (for '%s')\n", type, params.channel, buf);
8614         iwl4965_get_measurement(priv, &params, type);
8615
8616         return count;
8617 }
8618
8619 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8620                    show_measurement, store_measurement);
8621 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
8622
8623 static ssize_t store_retry_rate(struct device *d,
8624                                 struct device_attribute *attr,
8625                                 const char *buf, size_t count)
8626 {
8627         struct iwl4965_priv *priv = dev_get_drvdata(d);
8628
8629         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8630         if (priv->retry_rate <= 0)
8631                 priv->retry_rate = 1;
8632
8633         return count;
8634 }
8635
8636 static ssize_t show_retry_rate(struct device *d,
8637                                struct device_attribute *attr, char *buf)
8638 {
8639         struct iwl4965_priv *priv = dev_get_drvdata(d);
8640         return sprintf(buf, "%d", priv->retry_rate);
8641 }
8642
8643 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8644                    store_retry_rate);
8645
8646 static ssize_t store_power_level(struct device *d,
8647                                  struct device_attribute *attr,
8648                                  const char *buf, size_t count)
8649 {
8650         struct iwl4965_priv *priv = dev_get_drvdata(d);
8651         int rc;
8652         int mode;
8653
8654         mode = simple_strtoul(buf, NULL, 0);
8655         mutex_lock(&priv->mutex);
8656
8657         if (!iwl4965_is_ready(priv)) {
8658                 rc = -EAGAIN;
8659                 goto out;
8660         }
8661
8662         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8663                 mode = IWL_POWER_AC;
8664         else
8665                 mode |= IWL_POWER_ENABLED;
8666
8667         if (mode != priv->power_mode) {
8668                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8669                 if (rc) {
8670                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8671                         goto out;
8672                 }
8673                 priv->power_mode = mode;
8674         }
8675
8676         rc = count;
8677
8678  out:
8679         mutex_unlock(&priv->mutex);
8680         return rc;
8681 }
8682
8683 #define MAX_WX_STRING 80
8684
8685 /* Values are in microsecond */
8686 static const s32 timeout_duration[] = {
8687         350000,
8688         250000,
8689         75000,
8690         37000,
8691         25000,
8692 };
8693 static const s32 period_duration[] = {
8694         400000,
8695         700000,
8696         1000000,
8697         1000000,
8698         1000000
8699 };
8700
8701 static ssize_t show_power_level(struct device *d,
8702                                 struct device_attribute *attr, char *buf)
8703 {
8704         struct iwl4965_priv *priv = dev_get_drvdata(d);
8705         int level = IWL_POWER_LEVEL(priv->power_mode);
8706         char *p = buf;
8707
8708         p += sprintf(p, "%d ", level);
8709         switch (level) {
8710         case IWL_POWER_MODE_CAM:
8711         case IWL_POWER_AC:
8712                 p += sprintf(p, "(AC)");
8713                 break;
8714         case IWL_POWER_BATTERY:
8715                 p += sprintf(p, "(BATTERY)");
8716                 break;
8717         default:
8718                 p += sprintf(p,
8719                              "(Timeout %dms, Period %dms)",
8720                              timeout_duration[level - 1] / 1000,
8721                              period_duration[level - 1] / 1000);
8722         }
8723
8724         if (!(priv->power_mode & IWL_POWER_ENABLED))
8725                 p += sprintf(p, " OFF\n");
8726         else
8727                 p += sprintf(p, " \n");
8728
8729         return (p - buf + 1);
8730
8731 }
8732
8733 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8734                    store_power_level);
8735
8736 static ssize_t show_channels(struct device *d,
8737                              struct device_attribute *attr, char *buf)
8738 {
8739         struct iwl4965_priv *priv = dev_get_drvdata(d);
8740         int len = 0, i;
8741         struct ieee80211_channel *channels = NULL;
8742         const struct ieee80211_hw_mode *hw_mode = NULL;
8743         int count = 0;
8744
8745         if (!iwl4965_is_ready(priv))
8746                 return -EAGAIN;
8747
8748         hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211G);
8749         if (!hw_mode)
8750                 hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211B);
8751         if (hw_mode) {
8752                 channels = hw_mode->channels;
8753                 count = hw_mode->num_channels;
8754         }
8755
8756         len +=
8757             sprintf(&buf[len],
8758                     "Displaying %d channels in 2.4GHz band "
8759                     "(802.11bg):\n", count);
8760
8761         for (i = 0; i < count; i++)
8762                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8763                                channels[i].chan,
8764                                channels[i].power_level,
8765                                channels[i].
8766                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8767                                " (IEEE 802.11h required)" : "",
8768                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8769                                 || (channels[i].
8770                                     flag &
8771                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8772                                ", IBSS",
8773                                channels[i].
8774                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8775                                "active/passive" : "passive only");
8776
8777         hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211A);
8778         if (hw_mode) {
8779                 channels = hw_mode->channels;
8780                 count = hw_mode->num_channels;
8781         } else {
8782                 channels = NULL;
8783                 count = 0;
8784         }
8785
8786         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8787                        "(802.11a):\n", count);
8788
8789         for (i = 0; i < count; i++)
8790                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8791                                channels[i].chan,
8792                                channels[i].power_level,
8793                                channels[i].
8794                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8795                                " (IEEE 802.11h required)" : "",
8796                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8797                                 || (channels[i].
8798                                     flag &
8799                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8800                                ", IBSS",
8801                                channels[i].
8802                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8803                                "active/passive" : "passive only");
8804
8805         return len;
8806 }
8807
8808 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8809
8810 static ssize_t show_statistics(struct device *d,
8811                                struct device_attribute *attr, char *buf)
8812 {
8813         struct iwl4965_priv *priv = dev_get_drvdata(d);
8814         u32 size = sizeof(struct iwl4965_notif_statistics);
8815         u32 len = 0, ofs = 0;
8816         u8 *data = (u8 *) & priv->statistics;
8817         int rc = 0;
8818
8819         if (!iwl4965_is_alive(priv))
8820                 return -EAGAIN;
8821
8822         mutex_lock(&priv->mutex);
8823         rc = iwl4965_send_statistics_request(priv);
8824         mutex_unlock(&priv->mutex);
8825
8826         if (rc) {
8827                 len = sprintf(buf,
8828                               "Error sending statistics request: 0x%08X\n", rc);
8829                 return len;
8830         }
8831
8832         while (size && (PAGE_SIZE - len)) {
8833                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8834                                    PAGE_SIZE - len, 1);
8835                 len = strlen(buf);
8836                 if (PAGE_SIZE - len)
8837                         buf[len++] = '\n';
8838
8839                 ofs += 16;
8840                 size -= min(size, 16U);
8841         }
8842
8843         return len;
8844 }
8845
8846 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8847
8848 static ssize_t show_antenna(struct device *d,
8849                             struct device_attribute *attr, char *buf)
8850 {
8851         struct iwl4965_priv *priv = dev_get_drvdata(d);
8852
8853         if (!iwl4965_is_alive(priv))
8854                 return -EAGAIN;
8855
8856         return sprintf(buf, "%d\n", priv->antenna);
8857 }
8858
8859 static ssize_t store_antenna(struct device *d,
8860                              struct device_attribute *attr,
8861                              const char *buf, size_t count)
8862 {
8863         int ant;
8864         struct iwl4965_priv *priv = dev_get_drvdata(d);
8865
8866         if (count == 0)
8867                 return 0;
8868
8869         if (sscanf(buf, "%1i", &ant) != 1) {
8870                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8871                 return count;
8872         }
8873
8874         if ((ant >= 0) && (ant <= 2)) {
8875                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8876                 priv->antenna = (enum iwl4965_antenna)ant;
8877         } else
8878                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8879
8880
8881         return count;
8882 }
8883
8884 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8885
8886 static ssize_t show_status(struct device *d,
8887                            struct device_attribute *attr, char *buf)
8888 {
8889         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8890         if (!iwl4965_is_alive(priv))
8891                 return -EAGAIN;
8892         return sprintf(buf, "0x%08x\n", (int)priv->status);
8893 }
8894
8895 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8896
8897 static ssize_t dump_error_log(struct device *d,
8898                               struct device_attribute *attr,
8899                               const char *buf, size_t count)
8900 {
8901         char *p = (char *)buf;
8902
8903         if (p[0] == '1')
8904                 iwl4965_dump_nic_error_log((struct iwl4965_priv *)d->driver_data);
8905
8906         return strnlen(buf, count);
8907 }
8908
8909 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8910
8911 static ssize_t dump_event_log(struct device *d,
8912                               struct device_attribute *attr,
8913                               const char *buf, size_t count)
8914 {
8915         char *p = (char *)buf;
8916
8917         if (p[0] == '1')
8918                 iwl4965_dump_nic_event_log((struct iwl4965_priv *)d->driver_data);
8919
8920         return strnlen(buf, count);
8921 }
8922
8923 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8924
8925 /*****************************************************************************
8926  *
8927  * driver setup and teardown
8928  *
8929  *****************************************************************************/
8930
8931 static void iwl4965_setup_deferred_work(struct iwl4965_priv *priv)
8932 {
8933         priv->workqueue = create_workqueue(DRV_NAME);
8934
8935         init_waitqueue_head(&priv->wait_command_queue);
8936
8937         INIT_WORK(&priv->up, iwl4965_bg_up);
8938         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8939         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8940         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8941         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8942         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8943         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8944         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8945         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8946         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8947         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8948         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8949
8950         iwl4965_hw_setup_deferred_work(priv);
8951
8952         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8953                      iwl4965_irq_tasklet, (unsigned long)priv);
8954 }
8955
8956 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv)
8957 {
8958         iwl4965_hw_cancel_deferred_work(priv);
8959
8960         cancel_delayed_work_sync(&priv->init_alive_start);
8961         cancel_delayed_work(&priv->scan_check);
8962         cancel_delayed_work(&priv->alive_start);
8963         cancel_delayed_work(&priv->post_associate);
8964         cancel_work_sync(&priv->beacon_update);
8965 }
8966
8967 static struct attribute *iwl4965_sysfs_entries[] = {
8968         &dev_attr_antenna.attr,
8969         &dev_attr_channels.attr,
8970         &dev_attr_dump_errors.attr,
8971         &dev_attr_dump_events.attr,
8972         &dev_attr_flags.attr,
8973         &dev_attr_filter_flags.attr,
8974 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8975         &dev_attr_measurement.attr,
8976 #endif
8977         &dev_attr_power_level.attr,
8978         &dev_attr_retry_rate.attr,
8979         &dev_attr_rf_kill.attr,
8980         &dev_attr_rs_window.attr,
8981         &dev_attr_statistics.attr,
8982         &dev_attr_status.attr,
8983         &dev_attr_temperature.attr,
8984         &dev_attr_tune.attr,
8985         &dev_attr_tx_power.attr,
8986
8987         NULL
8988 };
8989
8990 static struct attribute_group iwl4965_attribute_group = {
8991         .name = NULL,           /* put in device directory */
8992         .attrs = iwl4965_sysfs_entries,
8993 };
8994
8995 static struct ieee80211_ops iwl4965_hw_ops = {
8996         .tx = iwl4965_mac_tx,
8997         .start = iwl4965_mac_start,
8998         .stop = iwl4965_mac_stop,
8999         .add_interface = iwl4965_mac_add_interface,
9000         .remove_interface = iwl4965_mac_remove_interface,
9001         .config = iwl4965_mac_config,
9002         .config_interface = iwl4965_mac_config_interface,
9003         .configure_filter = iwl4965_configure_filter,
9004         .set_key = iwl4965_mac_set_key,
9005         .get_stats = iwl4965_mac_get_stats,
9006         .get_tx_stats = iwl4965_mac_get_tx_stats,
9007         .conf_tx = iwl4965_mac_conf_tx,
9008         .get_tsf = iwl4965_mac_get_tsf,
9009         .reset_tsf = iwl4965_mac_reset_tsf,
9010         .beacon_update = iwl4965_mac_beacon_update,
9011         .bss_info_changed = iwl4965_bss_info_changed,
9012 #ifdef CONFIG_IWL4965_HT
9013         .conf_ht = iwl4965_mac_conf_ht,
9014         .ampdu_action = iwl4965_mac_ampdu_action,
9015 #ifdef CONFIG_IWL4965_HT_AGG
9016         .ht_tx_agg_start = iwl4965_mac_ht_tx_agg_start,
9017         .ht_tx_agg_stop = iwl4965_mac_ht_tx_agg_stop,
9018 #endif  /* CONFIG_IWL4965_HT_AGG */
9019 #endif  /* CONFIG_IWL4965_HT */
9020         .hw_scan = iwl4965_mac_hw_scan
9021 };
9022
9023 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9024 {
9025         int err = 0;
9026         struct iwl4965_priv *priv;
9027         struct ieee80211_hw *hw;
9028         int i;
9029         DECLARE_MAC_BUF(mac);
9030
9031         /* Disabling hardware scan means that mac80211 will perform scans
9032          * "the hard way", rather than using device's scan. */
9033         if (iwl4965_param_disable_hw_scan) {
9034                 IWL_DEBUG_INFO("Disabling hw_scan\n");
9035                 iwl4965_hw_ops.hw_scan = NULL;
9036         }
9037
9038         if ((iwl4965_param_queues_num > IWL_MAX_NUM_QUEUES) ||
9039             (iwl4965_param_queues_num < IWL_MIN_NUM_QUEUES)) {
9040                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
9041                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
9042                 err = -EINVAL;
9043                 goto out;
9044         }
9045
9046         /* mac80211 allocates memory for this device instance, including
9047          *   space for this driver's private structure */
9048         hw = ieee80211_alloc_hw(sizeof(struct iwl4965_priv), &iwl4965_hw_ops);
9049         if (hw == NULL) {
9050                 IWL_ERROR("Can not allocate network device\n");
9051                 err = -ENOMEM;
9052                 goto out;
9053         }
9054         SET_IEEE80211_DEV(hw, &pdev->dev);
9055
9056         hw->rate_control_algorithm = "iwl-4965-rs";
9057
9058         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
9059         priv = hw->priv;
9060         priv->hw = hw;
9061
9062         priv->pci_dev = pdev;
9063         priv->antenna = (enum iwl4965_antenna)iwl4965_param_antenna;
9064 #ifdef CONFIG_IWL4965_DEBUG
9065         iwl4965_debug_level = iwl4965_param_debug;
9066         atomic_set(&priv->restrict_refcnt, 0);
9067 #endif
9068         priv->retry_rate = 1;
9069
9070         priv->ibss_beacon = NULL;
9071
9072         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
9073          *   the range of signal quality values that we'll provide.
9074          * Negative values for level/noise indicate that we'll provide dBm.
9075          * For WE, at least, non-0 values here *enable* display of values
9076          *   in app (iwconfig). */
9077         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
9078         hw->max_noise = -20;    /* noise level, negative indicates dBm */
9079         hw->max_signal = 100;   /* link quality indication (%) */
9080
9081         /* Tell mac80211 our Tx characteristics */
9082         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9083
9084         /* Default value; 4 EDCA QOS priorities */
9085         hw->queues = 4;
9086 #ifdef CONFIG_IWL4965_HT
9087 #ifdef CONFIG_IWL4965_HT_AGG
9088         /* Enhanced value; more queues, to support 11n aggregation */
9089         hw->queues = 16;
9090 #endif /* CONFIG_IWL4965_HT_AGG */
9091 #endif /* CONFIG_IWL4965_HT */
9092
9093         spin_lock_init(&priv->lock);
9094         spin_lock_init(&priv->power_data.lock);
9095         spin_lock_init(&priv->sta_lock);
9096         spin_lock_init(&priv->hcmd_lock);
9097         spin_lock_init(&priv->lq_mngr.lock);
9098
9099         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9100                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9101
9102         INIT_LIST_HEAD(&priv->free_frames);
9103
9104         mutex_init(&priv->mutex);
9105         if (pci_enable_device(pdev)) {
9106                 err = -ENODEV;
9107                 goto out_ieee80211_free_hw;
9108         }
9109
9110         pci_set_master(pdev);
9111
9112         /* Clear the driver's (not device's) station table */
9113         iwl4965_clear_stations_table(priv);
9114
9115         priv->data_retry_limit = -1;
9116         priv->ieee_channels = NULL;
9117         priv->ieee_rates = NULL;
9118         priv->phymode = -1;
9119
9120         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9121         if (!err)
9122                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9123         if (err) {
9124                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9125                 goto out_pci_disable_device;
9126         }
9127
9128         pci_set_drvdata(pdev, priv);
9129         err = pci_request_regions(pdev, DRV_NAME);
9130         if (err)
9131                 goto out_pci_disable_device;
9132
9133         /* We disable the RETRY_TIMEOUT register (0x41) to keep
9134          * PCI Tx retries from interfering with C3 CPU state */
9135         pci_write_config_byte(pdev, 0x41, 0x00);
9136
9137         priv->hw_base = pci_iomap(pdev, 0, 0);
9138         if (!priv->hw_base) {
9139                 err = -ENODEV;
9140                 goto out_pci_release_regions;
9141         }
9142
9143         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9144                         (unsigned long long) pci_resource_len(pdev, 0));
9145         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9146
9147         /* Initialize module parameter values here */
9148
9149         /* Disable radio (SW RF KILL) via parameter when loading driver */
9150         if (iwl4965_param_disable) {
9151                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9152                 IWL_DEBUG_INFO("Radio disabled.\n");
9153         }
9154
9155         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9156
9157         priv->ps_mode = 0;
9158         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9159         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9160         priv->ps_mode = IWL_MIMO_PS_NONE;
9161
9162         /* Choose which receivers/antennas to use */
9163         iwl4965_set_rxon_chain(priv);
9164
9165         printk(KERN_INFO DRV_NAME
9166                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9167
9168         /* Device-specific setup */
9169         if (iwl4965_hw_set_hw_setting(priv)) {
9170                 IWL_ERROR("failed to set hw settings\n");
9171                 goto out_iounmap;
9172         }
9173
9174 #ifdef CONFIG_IWL4965_QOS
9175         if (iwl4965_param_qos_enable)
9176                 priv->qos_data.qos_enable = 1;
9177
9178         iwl4965_reset_qos(priv);
9179
9180         priv->qos_data.qos_active = 0;
9181         priv->qos_data.qos_cap.val = 0;
9182 #endif /* CONFIG_IWL4965_QOS */
9183
9184         iwl4965_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9185         iwl4965_setup_deferred_work(priv);
9186         iwl4965_setup_rx_handlers(priv);
9187
9188         priv->rates_mask = IWL_RATES_MASK;
9189         /* If power management is turned on, default to AC mode */
9190         priv->power_mode = IWL_POWER_AC;
9191         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9192
9193         iwl4965_disable_interrupts(priv);
9194
9195         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9196         if (err) {
9197                 IWL_ERROR("failed to create sysfs device attributes\n");
9198                 goto out_release_irq;
9199         }
9200
9201         /* nic init */
9202         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
9203                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
9204
9205         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
9206         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
9207                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
9208                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
9209         if (err < 0) {
9210                 IWL_DEBUG_INFO("Failed to init the card\n");
9211                 goto out_remove_sysfs;
9212         }
9213         /* Read the EEPROM */
9214         err = iwl4965_eeprom_init(priv);
9215         if (err) {
9216                 IWL_ERROR("Unable to init EEPROM\n");
9217                 goto out_remove_sysfs;
9218         }
9219         /* MAC Address location in EEPROM same for 3945/4965 */
9220         get_eeprom_mac(priv, priv->mac_addr);
9221         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
9222         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
9223
9224         err = iwl4965_init_channel_map(priv);
9225         if (err) {
9226                 IWL_ERROR("initializing regulatory failed: %d\n", err);
9227                 goto out_remove_sysfs;
9228         }
9229
9230         err = iwl4965_init_geos(priv);
9231         if (err) {
9232                 IWL_ERROR("initializing geos failed: %d\n", err);
9233                 goto out_free_channel_map;
9234         }
9235         iwl4965_reset_channel_flag(priv);
9236
9237         iwl4965_rate_control_register(priv->hw);
9238         err = ieee80211_register_hw(priv->hw);
9239         if (err) {
9240                 IWL_ERROR("Failed to register network device (error %d)\n", err);
9241                 goto out_free_geos;
9242         }
9243
9244         priv->hw->conf.beacon_int = 100;
9245         priv->mac80211_registered = 1;
9246         pci_save_state(pdev);
9247         pci_disable_device(pdev);
9248
9249         return 0;
9250
9251  out_free_geos:
9252         iwl4965_free_geos(priv);
9253  out_free_channel_map:
9254         iwl4965_free_channel_map(priv);
9255  out_remove_sysfs:
9256         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9257
9258  out_release_irq:
9259         destroy_workqueue(priv->workqueue);
9260         priv->workqueue = NULL;
9261         iwl4965_unset_hw_setting(priv);
9262
9263  out_iounmap:
9264         pci_iounmap(pdev, priv->hw_base);
9265  out_pci_release_regions:
9266         pci_release_regions(pdev);
9267  out_pci_disable_device:
9268         pci_disable_device(pdev);
9269         pci_set_drvdata(pdev, NULL);
9270  out_ieee80211_free_hw:
9271         ieee80211_free_hw(priv->hw);
9272  out:
9273         return err;
9274 }
9275
9276 static void iwl4965_pci_remove(struct pci_dev *pdev)
9277 {
9278         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9279         struct list_head *p, *q;
9280         int i;
9281
9282         if (!priv)
9283                 return;
9284
9285         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9286
9287         set_bit(STATUS_EXIT_PENDING, &priv->status);
9288
9289         iwl4965_down(priv);
9290
9291         /* Free MAC hash list for ADHOC */
9292         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9293                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9294                         list_del(p);
9295                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
9296                 }
9297         }
9298
9299         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9300
9301         iwl4965_dealloc_ucode_pci(priv);
9302
9303         if (priv->rxq.bd)
9304                 iwl4965_rx_queue_free(priv, &priv->rxq);
9305         iwl4965_hw_txq_ctx_free(priv);
9306
9307         iwl4965_unset_hw_setting(priv);
9308         iwl4965_clear_stations_table(priv);
9309
9310         if (priv->mac80211_registered) {
9311                 ieee80211_unregister_hw(priv->hw);
9312                 iwl4965_rate_control_unregister(priv->hw);
9313         }
9314
9315         /*netif_stop_queue(dev); */
9316         flush_workqueue(priv->workqueue);
9317
9318         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
9319          * priv->workqueue... so we can't take down the workqueue
9320          * until now... */
9321         destroy_workqueue(priv->workqueue);
9322         priv->workqueue = NULL;
9323
9324         pci_iounmap(pdev, priv->hw_base);
9325         pci_release_regions(pdev);
9326         pci_disable_device(pdev);
9327         pci_set_drvdata(pdev, NULL);
9328
9329         iwl4965_free_channel_map(priv);
9330         iwl4965_free_geos(priv);
9331
9332         if (priv->ibss_beacon)
9333                 dev_kfree_skb(priv->ibss_beacon);
9334
9335         ieee80211_free_hw(priv->hw);
9336 }
9337
9338 #ifdef CONFIG_PM
9339
9340 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9341 {
9342         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9343
9344         if (priv->is_open) {
9345                 set_bit(STATUS_IN_SUSPEND, &priv->status);
9346                 iwl4965_mac_stop(priv->hw);
9347                 priv->is_open = 1;
9348         }
9349
9350         pci_set_power_state(pdev, PCI_D3hot);
9351
9352         return 0;
9353 }
9354
9355 static int iwl4965_pci_resume(struct pci_dev *pdev)
9356 {
9357         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9358
9359         pci_set_power_state(pdev, PCI_D0);
9360
9361         if (priv->is_open)
9362                 iwl4965_mac_start(priv->hw);
9363
9364         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9365         return 0;
9366 }
9367
9368 #endif /* CONFIG_PM */
9369
9370 /*****************************************************************************
9371  *
9372  * driver and module entry point
9373  *
9374  *****************************************************************************/
9375
9376 static struct pci_driver iwl4965_driver = {
9377         .name = DRV_NAME,
9378         .id_table = iwl4965_hw_card_ids,
9379         .probe = iwl4965_pci_probe,
9380         .remove = __devexit_p(iwl4965_pci_remove),
9381 #ifdef CONFIG_PM
9382         .suspend = iwl4965_pci_suspend,
9383         .resume = iwl4965_pci_resume,
9384 #endif
9385 };
9386
9387 static int __init iwl4965_init(void)
9388 {
9389
9390         int ret;
9391         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9392         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9393         ret = pci_register_driver(&iwl4965_driver);
9394         if (ret) {
9395                 IWL_ERROR("Unable to initialize PCI module\n");
9396                 return ret;
9397         }
9398 #ifdef CONFIG_IWL4965_DEBUG
9399         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9400         if (ret) {
9401                 IWL_ERROR("Unable to create driver sysfs file\n");
9402                 pci_unregister_driver(&iwl4965_driver);
9403                 return ret;
9404         }
9405 #endif
9406
9407         return ret;
9408 }
9409
9410 static void __exit iwl4965_exit(void)
9411 {
9412 #ifdef CONFIG_IWL4965_DEBUG
9413         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9414 #endif
9415         pci_unregister_driver(&iwl4965_driver);
9416 }
9417
9418 module_param_named(antenna, iwl4965_param_antenna, int, 0444);
9419 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9420 module_param_named(disable, iwl4965_param_disable, int, 0444);
9421 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9422 module_param_named(hwcrypto, iwl4965_param_hwcrypto, int, 0444);
9423 MODULE_PARM_DESC(hwcrypto,
9424                  "using hardware crypto engine (default 0 [software])\n");
9425 module_param_named(debug, iwl4965_param_debug, int, 0444);
9426 MODULE_PARM_DESC(debug, "debug output mask");
9427 module_param_named(disable_hw_scan, iwl4965_param_disable_hw_scan, int, 0444);
9428 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9429
9430 module_param_named(queues_num, iwl4965_param_queues_num, int, 0444);
9431 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9432
9433 /* QoS */
9434 module_param_named(qos_enable, iwl4965_param_qos_enable, int, 0444);
9435 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9436 module_param_named(amsdu_size_8K, iwl4965_param_amsdu_size_8K, int, 0444);
9437 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
9438
9439 module_exit(iwl4965_exit);
9440 module_init(iwl4965_init);