git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl3945-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/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945.h"
  50 #include "iwl-helpers.h"
  51
  52 #ifdef CONFIG_IWL3945_DEBUG
  53 u32 iwl3945_debug_level;
  54 #endif
  55
  56 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  57                                   struct iwl3945_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /* module parameters */
  66 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  67 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  68 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  69 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  70 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  71 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  72 int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  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 \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.1.19k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98 /* Change firmware file name, using "-" and incrementing number,
  99  *   *only* when uCode interface or architecture changes so that it
 100  *   is not compatible with earlier drivers.
 101  * This number will also appear in << 8 position of 1st dword of uCode file */
 102 #define IWL3945_UCODE_API "-1"
 103
 104 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 105 MODULE_VERSION(DRV_VERSION);
 106 MODULE_AUTHOR(DRV_COPYRIGHT);
 107 MODULE_LICENSE("GPL");
 108
 109 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 110 {
 111         u16 fc = le16_to_cpu(hdr->frame_control);
 112         int hdr_len = ieee80211_get_hdrlen(fc);
 113
 114         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 115                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 116         return NULL;
 117 }
 118
 119 static const struct ieee80211_hw_mode *iwl3945_get_hw_mode(
 120                 struct iwl3945_priv *priv, int mode)
 121 {
 122         int i;
 123
 124         for (i = 0; i < 3; i++)
 125                 if (priv->modes[i].mode == mode)
 126                         return &priv->modes[i];
 127
 128         return NULL;
 129 }
 130
 131 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 132 {
 133         /* Single white space is for Linksys APs */
 134         if (essid_len == 1 && essid[0] == ' ')
 135                 return 1;
 136
 137         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 138         while (essid_len) {
 139                 essid_len--;
 140                 if (essid[essid_len] != '\0')
 141                         return 0;
 142         }
 143
 144         return 1;
 145 }
 146
 147 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 148 {
 149         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 150         const char *s = essid;
 151         char *d = escaped;
 152
 153         if (iwl3945_is_empty_essid(essid, essid_len)) {
 154                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 155                 return escaped;
 156         }
 157
 158         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 159         while (essid_len--) {
 160                 if (*s == '\0') {
 161                         *d++ = '\\';
 162                         *d++ = '0';
 163                         s++;
 164                 } else
 165                         *d++ = *s++;
 166         }
 167         *d = '\0';
 168         return escaped;
 169 }
 170
 171 static void iwl3945_print_hex_dump(int level, void *p, u32 len)
 172 {
 173 #ifdef CONFIG_IWL3945_DEBUG
 174         if (!(iwl3945_debug_level & level))
 175                 return;
 176
 177         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 178                         p, len, 1);
 179 #endif
 180 }
 181
 182 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 183  * DMA services
 184  *
 185  * Theory of operation
 186  *
 187  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 188  * of buffer descriptors, each of which points to one or more data buffers for
 189  * the device to read from or fill.  Driver and device exchange status of each
 190  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 191  * entries in each circular buffer, to protect against confusing empty and full
 192  * queue states.
 193  *
 194  * The device reads or writes the data in the queues via the device's several
 195  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 196  *
 197  * For Tx queue, there are low mark and high mark limits. If, after queuing
 198  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 199  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 200  * Tx queue resumed.
 201  *
 202  * The 3945 operates with six queues:  One receive queue, one transmit queue
 203  * (#4) for sending commands to the device firmware, and four transmit queues
 204  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 205  ***************************************************/
 206
 207 static int iwl3945_queue_space(const struct iwl3945_queue *q)
 208 {
 209         int s = q->read_ptr - q->write_ptr;
 210
 211         if (q->read_ptr > q->write_ptr)
 212                 s -= q->n_bd;
 213
 214         if (s <= 0)
 215                 s += q->n_window;
 216         /* keep some reserve to not confuse empty and full situations */
 217         s -= 2;
 218         if (s < 0)
 219                 s = 0;
 220         return s;
 221 }
 222
 223 /**
 224  * iwl3945_queue_inc_wrap - increment queue index, wrap back to beginning
 225  * @index -- current index
 226  * @n_bd -- total number of entries in queue (must be power of 2)
 227  */
 228 static inline int iwl3945_queue_inc_wrap(int index, int n_bd)
 229 {
 230         return ++index & (n_bd - 1);
 231 }
 232
 233 /**
 234  * iwl3945_queue_dec_wrap - increment queue index, wrap back to end
 235  * @index -- current index
 236  * @n_bd -- total number of entries in queue (must be power of 2)
 237  */
 238 static inline int iwl3945_queue_dec_wrap(int index, int n_bd)
 239 {
 240         return --index & (n_bd - 1);
 241 }
 242
 243 static inline int x2_queue_used(const struct iwl3945_queue *q, int i)
 244 {
 245         return q->write_ptr > q->read_ptr ?
 246                 (i >= q->read_ptr && i < q->write_ptr) :
 247                 !(i < q->read_ptr && i >= q->write_ptr);
 248 }
 249
 250 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 251 {
 252         /* This is for scan command, the big buffer at end of command array */
 253         if (is_huge)
 254                 return q->n_window;     /* must be power of 2 */
 255
 256         /* Otherwise, use normal size buffers */
 257         return index & (q->n_window - 1);
 258 }
 259
 260 /**
 261  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 262  */
 263 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 264                           int count, int slots_num, u32 id)
 265 {
 266         q->n_bd = count;
 267         q->n_window = slots_num;
 268         q->id = id;
 269
 270         /* count must be power-of-two size, otherwise iwl3945_queue_inc_wrap
 271          * and iwl3945_queue_dec_wrap are broken. */
 272         BUG_ON(!is_power_of_2(count));
 273
 274         /* slots_num must be power-of-two size, otherwise
 275          * get_cmd_index is broken. */
 276         BUG_ON(!is_power_of_2(slots_num));
 277
 278         q->low_mark = q->n_window / 4;
 279         if (q->low_mark < 4)
 280                 q->low_mark = 4;
 281
 282         q->high_mark = q->n_window / 8;
 283         if (q->high_mark < 2)
 284                 q->high_mark = 2;
 285
 286         q->write_ptr = q->read_ptr = 0;
 287
 288         return 0;
 289 }
 290
 291 /**
 292  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 293  */
 294 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 295                               struct iwl3945_tx_queue *txq, u32 id)
 296 {
 297         struct pci_dev *dev = priv->pci_dev;
 298
 299         /* Driver private data, only for Tx (not command) queues,
 300          * not shared with device. */
 301         if (id != IWL_CMD_QUEUE_NUM) {
 302                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 303                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 304                 if (!txq->txb) {
 305                         IWL_ERROR("kmalloc for auxiliary BD "
 306                                   "structures failed\n");
 307                         goto error;
 308                 }
 309         } else
 310                 txq->txb = NULL;
 311
 312         /* Circular buffer of transmit frame descriptors (TFDs),
 313          * shared with device */
 314         txq->bd = pci_alloc_consistent(dev,
 315                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 316                         &txq->q.dma_addr);
 317
 318         if (!txq->bd) {
 319                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 320                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 321                 goto error;
 322         }
 323         txq->q.id = id;
 324
 325         return 0;
 326
 327  error:
 328         if (txq->txb) {
 329                 kfree(txq->txb);
 330                 txq->txb = NULL;
 331         }
 332
 333         return -ENOMEM;
 334 }
 335
 336 /**
 337  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 338  */
 339 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 340                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 341 {
 342         struct pci_dev *dev = priv->pci_dev;
 343         int len;
 344         int rc = 0;
 345
 346         /*
 347          * Alloc buffer array for commands (Tx or other types of commands).
 348          * For the command queue (#4), allocate command space + one big
 349          * command for scan, since scan command is very huge; the system will
 350          * not have two scans at the same time, so only one is needed.
 351          * For data Tx queues (all other queues), no super-size command
 352          * space is needed.
 353          */
 354         len = sizeof(struct iwl3945_cmd) * slots_num;
 355         if (txq_id == IWL_CMD_QUEUE_NUM)
 356                 len +=  IWL_MAX_SCAN_SIZE;
 357         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 358         if (!txq->cmd)
 359                 return -ENOMEM;
 360
 361         /* Alloc driver data array and TFD circular buffer */
 362         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 363         if (rc) {
 364                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 365
 366                 return -ENOMEM;
 367         }
 368         txq->need_update = 0;
 369
 370         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 371          * iwl3945_queue_inc_wrap and iwl3945_queue_dec_wrap are broken. */
 372         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 373
 374         /* Initialize queue high/low-water, head/tail indexes */
 375         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 376
 377         /* Tell device where to find queue, enable DMA channel. */
 378         iwl3945_hw_tx_queue_init(priv, txq);
 379
 380         return 0;
 381 }
 382
 383 /**
 384  * iwl3945_tx_queue_free - Deallocate DMA queue.
 385  * @txq: Transmit queue to deallocate.
 386  *
 387  * Empty queue by removing and destroying all BD's.
 388  * Free all buffers.
 389  * 0-fill, but do not free "txq" descriptor structure.
 390  */
 391 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 392 {
 393         struct iwl3945_queue *q = &txq->q;
 394         struct pci_dev *dev = priv->pci_dev;
 395         int len;
 396
 397         if (q->n_bd == 0)
 398                 return;
 399
 400         /* first, empty all BD's */
 401         for (; q->write_ptr != q->read_ptr;
 402              q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd))
 403                 iwl3945_hw_txq_free_tfd(priv, txq);
 404
 405         len = sizeof(struct iwl3945_cmd) * q->n_window;
 406         if (q->id == IWL_CMD_QUEUE_NUM)
 407                 len += IWL_MAX_SCAN_SIZE;
 408
 409         /* De-alloc array of command/tx buffers */
 410         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 411
 412         /* De-alloc circular buffer of TFDs */
 413         if (txq->q.n_bd)
 414                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 415                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 416
 417         /* De-alloc array of per-TFD driver data */
 418         if (txq->txb) {
 419                 kfree(txq->txb);
 420                 txq->txb = NULL;
 421         }
 422
 423         /* 0-fill queue descriptor structure */
 424         memset(txq, 0, sizeof(*txq));
 425 }
 426
 427 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 428
 429 /*************** STATION TABLE MANAGEMENT ****
 430  * mac80211 should be examined to determine if sta_info is duplicating
 431  * the functionality provided here
 432  */
 433
 434 /**************************************************************/
 435 #if 0 /* temporary disable till we add real remove station */
 436 /**
 437  * iwl3945_remove_station - Remove driver's knowledge of station.
 438  *
 439  * NOTE:  This does not remove station from device's station table.
 440  */
 441 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 442 {
 443         int index = IWL_INVALID_STATION;
 444         int i;
 445         unsigned long flags;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448
 449         if (is_ap)
 450                 index = IWL_AP_ID;
 451         else if (is_broadcast_ether_addr(addr))
 452                 index = priv->hw_setting.bcast_sta_id;
 453         else
 454                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 455                         if (priv->stations[i].used &&
 456                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 457                                                 addr)) {
 458                                 index = i;
 459                                 break;
 460                         }
 461
 462         if (unlikely(index == IWL_INVALID_STATION))
 463                 goto out;
 464
 465         if (priv->stations[index].used) {
 466                 priv->stations[index].used = 0;
 467                 priv->num_stations--;
 468         }
 469
 470         BUG_ON(priv->num_stations < 0);
 471
 472 out:
 473         spin_unlock_irqrestore(&priv->sta_lock, flags);
 474         return 0;
 475 }
 476 #endif
 477
 478 /**
 479  * iwl3945_clear_stations_table - Clear the driver's station table
 480  *
 481  * NOTE:  This does not clear or otherwise alter the device's station table.
 482  */
 483 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 484 {
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&priv->sta_lock, flags);
 488
 489         priv->num_stations = 0;
 490         memset(priv->stations, 0, sizeof(priv->stations));
 491
 492         spin_unlock_irqrestore(&priv->sta_lock, flags);
 493 }
 494
 495 /**
 496  * iwl3945_add_station - Add station to station tables in driver and device
 497  */
 498 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 499 {
 500         int i;
 501         int index = IWL_INVALID_STATION;
 502         struct iwl3945_station_entry *station;
 503         unsigned long flags_spin;
 504         DECLARE_MAC_BUF(mac);
 505         u8 rate;
 506
 507         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 508         if (is_ap)
 509                 index = IWL_AP_ID;
 510         else if (is_broadcast_ether_addr(addr))
 511                 index = priv->hw_setting.bcast_sta_id;
 512         else
 513                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 514                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 515                                                 addr)) {
 516                                 index = i;
 517                                 break;
 518                         }
 519
 520                         if (!priv->stations[i].used &&
 521                             index == IWL_INVALID_STATION)
 522                                 index = i;
 523                 }
 524
 525         /* These two conditions has the same outcome but keep them separate
 526           since they have different meaning */
 527         if (unlikely(index == IWL_INVALID_STATION)) {
 528                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 529                 return index;
 530         }
 531
 532         if (priv->stations[index].used &&
 533            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 534                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 535                 return index;
 536         }
 537
 538         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 539         station = &priv->stations[index];
 540         station->used = 1;
 541         priv->num_stations++;
 542
 543         /* Set up the REPLY_ADD_STA command to send to device */
 544         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 545         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 546         station->sta.mode = 0;
 547         station->sta.sta.sta_id = index;
 548         station->sta.station_flags = 0;
 549
 550         if (priv->phymode == MODE_IEEE80211A)
 551                 rate = IWL_RATE_6M_PLCP;
 552         else
 553                 rate =  IWL_RATE_1M_PLCP;
 554
 555         /* Turn on both antennas for the station... */
 556         station->sta.rate_n_flags =
 557                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 558         station->current_rate.rate_n_flags =
 559                         le16_to_cpu(station->sta.rate_n_flags);
 560
 561         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 562
 563         /* Add station to device's station table */
 564         iwl3945_send_add_station(priv, &station->sta, flags);
 565         return index;
 566
 567 }
 568
 569 /*************** DRIVER STATUS FUNCTIONS   *****/
 570
 571 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 572 {
 573         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 574          * set but EXIT_PENDING is not */
 575         return test_bit(STATUS_READY, &priv->status) &&
 576                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 577                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 578 }
 579
 580 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 581 {
 582         return test_bit(STATUS_ALIVE, &priv->status);
 583 }
 584
 585 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 586 {
 587         return test_bit(STATUS_INIT, &priv->status);
 588 }
 589
 590 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 591 {
 592         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 593                test_bit(STATUS_RF_KILL_SW, &priv->status);
 594 }
 595
 596 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 597 {
 598
 599         if (iwl3945_is_rfkill(priv))
 600                 return 0;
 601
 602         return iwl3945_is_ready(priv);
 603 }
 604
 605 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 606
 607 #define IWL_CMD(x) case x : return #x
 608
 609 static const char *get_cmd_string(u8 cmd)
 610 {
 611         switch (cmd) {
 612                 IWL_CMD(REPLY_ALIVE);
 613                 IWL_CMD(REPLY_ERROR);
 614                 IWL_CMD(REPLY_RXON);
 615                 IWL_CMD(REPLY_RXON_ASSOC);
 616                 IWL_CMD(REPLY_QOS_PARAM);
 617                 IWL_CMD(REPLY_RXON_TIMING);
 618                 IWL_CMD(REPLY_ADD_STA);
 619                 IWL_CMD(REPLY_REMOVE_STA);
 620                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 621                 IWL_CMD(REPLY_3945_RX);
 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         default:
 653                 return "UNKNOWN";
 654
 655         }
 656 }
 657
 658 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 659
 660 /**
 661  * iwl3945_enqueue_hcmd - enqueue a uCode command
 662  * @priv: device private data point
 663  * @cmd: a point to the ucode command structure
 664  *
 665  * The function returns < 0 values to indicate the operation is
 666  * failed. On success, it turns the index (> 0) of command in the
 667  * command queue.
 668  */
 669 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 670 {
 671         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 672         struct iwl3945_queue *q = &txq->q;
 673         struct iwl3945_tfd_frame *tfd;
 674         u32 *control_flags;
 675         struct iwl3945_cmd *out_cmd;
 676         u32 idx;
 677         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 678         dma_addr_t phys_addr;
 679         int pad;
 680         u16 count;
 681         int ret;
 682         unsigned long flags;
 683
 684         /* If any of the command structures end up being larger than
 685          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 686          * we will need to increase the size of the TFD entries */
 687         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 688                !(cmd->meta.flags & CMD_SIZE_HUGE));
 689
 690         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 691                 IWL_ERROR("No space for Tx\n");
 692                 return -ENOSPC;
 693         }
 694
 695         spin_lock_irqsave(&priv->hcmd_lock, flags);
 696
 697         tfd = &txq->bd[q->write_ptr];
 698         memset(tfd, 0, sizeof(*tfd));
 699
 700         control_flags = (u32 *) tfd;
 701
 702         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 703         out_cmd = &txq->cmd[idx];
 704
 705         out_cmd->hdr.cmd = cmd->id;
 706         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 707         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 708
 709         /* At this point, the out_cmd now has all of the incoming cmd
 710          * information */
 711
 712         out_cmd->hdr.flags = 0;
 713         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 714                         INDEX_TO_SEQ(q->write_ptr));
 715         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 716                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 717
 718         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 719                         offsetof(struct iwl3945_cmd, hdr);
 720         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 721
 722         pad = U32_PAD(cmd->len);
 723         count = TFD_CTL_COUNT_GET(*control_flags);
 724         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 725
 726         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 727                      "%d bytes at %d[%d]:%d\n",
 728                      get_cmd_string(out_cmd->hdr.cmd),
 729                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 730                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 731
 732         txq->need_update = 1;
 733
 734         /* Increment and update queue's write index */
 735         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
 736         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 737
 738         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 739         return ret ? ret : idx;
 740 }
 741
 742 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 743 {
 744         int ret;
 745
 746         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 747
 748         /* An asynchronous command can not expect an SKB to be set. */
 749         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 750
 751         /* An asynchronous command MUST have a callback. */
 752         BUG_ON(!cmd->meta.u.callback);
 753
 754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 755                 return -EBUSY;
 756
 757         ret = iwl3945_enqueue_hcmd(priv, cmd);
 758         if (ret < 0) {
 759                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 760                           get_cmd_string(cmd->id), ret);
 761                 return ret;
 762         }
 763         return 0;
 764 }
 765
 766 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 767 {
 768         int cmd_idx;
 769         int ret;
 770         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 771
 772         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 773
 774          /* A synchronous command can not have a callback set. */
 775         BUG_ON(cmd->meta.u.callback != NULL);
 776
 777         if (atomic_xchg(&entry, 1)) {
 778                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 779                           get_cmd_string(cmd->id));
 780                 return -EBUSY;
 781         }
 782
 783         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 784
 785         if (cmd->meta.flags & CMD_WANT_SKB)
 786                 cmd->meta.source = &cmd->meta;
 787
 788         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 789         if (cmd_idx < 0) {
 790                 ret = cmd_idx;
 791                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 792                           get_cmd_string(cmd->id), ret);
 793                 goto out;
 794         }
 795
 796         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 797                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 798                         HOST_COMPLETE_TIMEOUT);
 799         if (!ret) {
 800                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 801                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 802                                   get_cmd_string(cmd->id),
 803                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 804
 805                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 806                         ret = -ETIMEDOUT;
 807                         goto cancel;
 808                 }
 809         }
 810
 811         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 812                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 813                                get_cmd_string(cmd->id));
 814                 ret = -ECANCELED;
 815                 goto fail;
 816         }
 817         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 818                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 819                                get_cmd_string(cmd->id));
 820                 ret = -EIO;
 821                 goto fail;
 822         }
 823         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 824                 IWL_ERROR("Error: Response NULL in '%s'\n",
 825                           get_cmd_string(cmd->id));
 826                 ret = -EIO;
 827                 goto out;
 828         }
 829
 830         ret = 0;
 831         goto out;
 832
 833 cancel:
 834         if (cmd->meta.flags & CMD_WANT_SKB) {
 835                 struct iwl3945_cmd *qcmd;
 836
 837                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 838                  * TX cmd queue. Otherwise in case the cmd comes
 839                  * in later, it will possibly set an invalid
 840                  * address (cmd->meta.source). */
 841                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 842                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 843         }
 844 fail:
 845         if (cmd->meta.u.skb) {
 846                 dev_kfree_skb_any(cmd->meta.u.skb);
 847                 cmd->meta.u.skb = NULL;
 848         }
 849 out:
 850         atomic_set(&entry, 0);
 851         return ret;
 852 }
 853
 854 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 855 {
 856         if (cmd->meta.flags & CMD_ASYNC)
 857                 return iwl3945_send_cmd_async(priv, cmd);
 858
 859         return iwl3945_send_cmd_sync(priv, cmd);
 860 }
 861
 862 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 863 {
 864         struct iwl3945_host_cmd cmd = {
 865                 .id = id,
 866                 .len = len,
 867                 .data = data,
 868         };
 869
 870         return iwl3945_send_cmd_sync(priv, &cmd);
 871 }
 872
 873 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 874 {
 875         struct iwl3945_host_cmd cmd = {
 876                 .id = id,
 877                 .len = sizeof(val),
 878                 .data = &val,
 879         };
 880
 881         return iwl3945_send_cmd_sync(priv, &cmd);
 882 }
 883
 884 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 885 {
 886         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 887 }
 888
 889 /**
 890  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 891  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 892  * @channel: Any channel valid for the requested phymode
 893
 894  * In addition to setting the staging RXON, priv->phymode is also set.
 895  *
 896  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 897  * in the staging RXON flag structure based on the phymode
 898  */
 899 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv, u8 phymode, u16 channel)
 900 {
 901         if (!iwl3945_get_channel_info(priv, phymode, channel)) {
 902                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 903                                channel, phymode);
 904                 return -EINVAL;
 905         }
 906
 907         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 908             (priv->phymode == phymode))
 909                 return 0;
 910
 911         priv->staging_rxon.channel = cpu_to_le16(channel);
 912         if (phymode == MODE_IEEE80211A)
 913                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 914         else
 915                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 916
 917         priv->phymode = phymode;
 918
 919         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 920
 921         return 0;
 922 }
 923
 924 /**
 925  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 926  *
 927  * NOTE:  This is really only useful during development and can eventually
 928  * be #ifdef'd out once the driver is stable and folks aren't actively
 929  * making changes
 930  */
 931 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 932 {
 933         int error = 0;
 934         int counter = 1;
 935
 936         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 937                 error |= le32_to_cpu(rxon->flags &
 938                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 939                                  RXON_FLG_RADAR_DETECT_MSK));
 940                 if (error)
 941                         IWL_WARNING("check 24G fields %d | %d\n",
 942                                     counter++, error);
 943         } else {
 944                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 945                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 946                 if (error)
 947                         IWL_WARNING("check 52 fields %d | %d\n",
 948                                     counter++, error);
 949                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 950                 if (error)
 951                         IWL_WARNING("check 52 CCK %d | %d\n",
 952                                     counter++, error);
 953         }
 954         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 955         if (error)
 956                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 957
 958         /* make sure basic rates 6Mbps and 1Mbps are supported */
 959         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 960                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 961         if (error)
 962                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 963
 964         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 965         if (error)
 966                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 967
 968         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 969                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 970         if (error)
 971                 IWL_WARNING("check CCK and short slot %d | %d\n",
 972                             counter++, error);
 973
 974         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 975                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 976         if (error)
 977                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 978                             counter++, error);
 979
 980         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 981                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 982         if (error)
 983                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 984                             counter++, error);
 985
 986         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 987                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 988                                 RXON_FLG_ANT_A_MSK)) == 0);
 989         if (error)
 990                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 991
 992         if (error)
 993                 IWL_WARNING("Tuning to channel %d\n",
 994                             le16_to_cpu(rxon->channel));
 995
 996         if (error) {
 997                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 998                 return -1;
 999         }
1000         return 0;
1001 }
1002
1003 /**
1004  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1005  * @priv: staging_rxon is compared to active_rxon
1006  *
1007  * If the RXON structure is changing enough to require a new tune,
1008  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1009  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1010  */
1011 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
1012 {
1013
1014         /* These items are only settable from the full RXON command */
1015         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1016             compare_ether_addr(priv->staging_rxon.bssid_addr,
1017                                priv->active_rxon.bssid_addr) ||
1018             compare_ether_addr(priv->staging_rxon.node_addr,
1019                                priv->active_rxon.node_addr) ||
1020             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1021                                priv->active_rxon.wlap_bssid_addr) ||
1022             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1023             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1024             (priv->staging_rxon.air_propagation !=
1025              priv->active_rxon.air_propagation) ||
1026             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1027                 return 1;
1028
1029         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1030          * be updated with the RXON_ASSOC command -- however only some
1031          * flag transitions are allowed using RXON_ASSOC */
1032
1033         /* Check if we are not switching bands */
1034         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1035             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1036                 return 1;
1037
1038         /* Check if we are switching association toggle */
1039         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1040                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1041                 return 1;
1042
1043         return 0;
1044 }
1045
1046 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1047 {
1048         int rc = 0;
1049         struct iwl3945_rx_packet *res = NULL;
1050         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1051         struct iwl3945_host_cmd cmd = {
1052                 .id = REPLY_RXON_ASSOC,
1053                 .len = sizeof(rxon_assoc),
1054                 .meta.flags = CMD_WANT_SKB,
1055                 .data = &rxon_assoc,
1056         };
1057         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1058         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1059
1060         if ((rxon1->flags == rxon2->flags) &&
1061             (rxon1->filter_flags == rxon2->filter_flags) &&
1062             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1063             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1064                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1065                 return 0;
1066         }
1067
1068         rxon_assoc.flags = priv->staging_rxon.flags;
1069         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1070         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1071         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1072         rxon_assoc.reserved = 0;
1073
1074         rc = iwl3945_send_cmd_sync(priv, &cmd);
1075         if (rc)
1076                 return rc;
1077
1078         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1079         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1080                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1081                 rc = -EIO;
1082         }
1083
1084         priv->alloc_rxb_skb--;
1085         dev_kfree_skb_any(cmd.meta.u.skb);
1086
1087         return rc;
1088 }
1089
1090 /**
1091  * iwl3945_commit_rxon - commit staging_rxon to hardware
1092  *
1093  * The RXON command in staging_rxon is committed to the hardware and
1094  * the active_rxon structure is updated with the new data.  This
1095  * function correctly transitions out of the RXON_ASSOC_MSK state if
1096  * a HW tune is required based on the RXON structure changes.
1097  */
1098 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1099 {
1100         /* cast away the const for active_rxon in this function */
1101         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1102         int rc = 0;
1103         DECLARE_MAC_BUF(mac);
1104
1105         if (!iwl3945_is_alive(priv))
1106                 return -1;
1107
1108         /* always get timestamp with Rx frame */
1109         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1110
1111         /* select antenna */
1112         priv->staging_rxon.flags &=
1113             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1114         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1115
1116         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1117         if (rc) {
1118                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1119                 return -EINVAL;
1120         }
1121
1122         /* If we don't need to send a full RXON, we can use
1123          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1124          * and other flags for the current radio configuration. */
1125         if (!iwl3945_full_rxon_required(priv)) {
1126                 rc = iwl3945_send_rxon_assoc(priv);
1127                 if (rc) {
1128                         IWL_ERROR("Error setting RXON_ASSOC "
1129                                   "configuration (%d).\n", rc);
1130                         return rc;
1131                 }
1132
1133                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1134
1135                 return 0;
1136         }
1137
1138         /* If we are currently associated and the new config requires
1139          * an RXON_ASSOC and the new config wants the associated mask enabled,
1140          * we must clear the associated from the active configuration
1141          * before we apply the new config */
1142         if (iwl3945_is_associated(priv) &&
1143             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1144                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1145                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1146
1147                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1148                                       sizeof(struct iwl3945_rxon_cmd),
1149                                       &priv->active_rxon);
1150
1151                 /* If the mask clearing failed then we set
1152                  * active_rxon back to what it was previously */
1153                 if (rc) {
1154                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1155                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1156                                   "configuration (%d).\n", rc);
1157                         return rc;
1158                 }
1159         }
1160
1161         IWL_DEBUG_INFO("Sending RXON\n"
1162                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1163                        "* channel = %d\n"
1164                        "* bssid = %s\n",
1165                        ((priv->staging_rxon.filter_flags &
1166                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1167                        le16_to_cpu(priv->staging_rxon.channel),
1168                        print_mac(mac, priv->staging_rxon.bssid_addr));
1169
1170         /* Apply the new configuration */
1171         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1172                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1173         if (rc) {
1174                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1175                 return rc;
1176         }
1177
1178         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1179
1180         iwl3945_clear_stations_table(priv);
1181
1182         /* If we issue a new RXON command which required a tune then we must
1183          * send a new TXPOWER command or we won't be able to Tx any frames */
1184         rc = iwl3945_hw_reg_send_txpower(priv);
1185         if (rc) {
1186                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1187                 return rc;
1188         }
1189
1190         /* Add the broadcast address so we can send broadcast frames */
1191         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1192             IWL_INVALID_STATION) {
1193                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1194                 return -EIO;
1195         }
1196
1197         /* If we have set the ASSOC_MSK and we are in BSS mode then
1198          * add the IWL_AP_ID to the station rate table */
1199         if (iwl3945_is_associated(priv) &&
1200             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1201                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1202                     == IWL_INVALID_STATION) {
1203                         IWL_ERROR("Error adding AP address for transmit.\n");
1204                         return -EIO;
1205                 }
1206
1207         /* Init the hardware's rate fallback order based on the
1208          * phymode */
1209         rc = iwl3945_init_hw_rate_table(priv);
1210         if (rc) {
1211                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1212                 return -EIO;
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1219 {
1220         struct iwl3945_bt_cmd bt_cmd = {
1221                 .flags = 3,
1222                 .lead_time = 0xAA,
1223                 .max_kill = 1,
1224                 .kill_ack_mask = 0,
1225                 .kill_cts_mask = 0,
1226         };
1227
1228         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1229                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1230 }
1231
1232 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1233 {
1234         int rc = 0;
1235         struct iwl3945_rx_packet *res;
1236         struct iwl3945_host_cmd cmd = {
1237                 .id = REPLY_SCAN_ABORT_CMD,
1238                 .meta.flags = CMD_WANT_SKB,
1239         };
1240
1241         /* If there isn't a scan actively going on in the hardware
1242          * then we are in between scan bands and not actually
1243          * actively scanning, so don't send the abort command */
1244         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1245                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1246                 return 0;
1247         }
1248
1249         rc = iwl3945_send_cmd_sync(priv, &cmd);
1250         if (rc) {
1251                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1252                 return rc;
1253         }
1254
1255         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1256         if (res->u.status != CAN_ABORT_STATUS) {
1257                 /* The scan abort will return 1 for success or
1258                  * 2 for "failure".  A failure condition can be
1259                  * due to simply not being in an active scan which
1260                  * can occur if we send the scan abort before we
1261                  * the microcode has notified us that a scan is
1262                  * completed. */
1263                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1264                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1265                 clear_bit(STATUS_SCAN_HW, &priv->status);
1266         }
1267
1268         dev_kfree_skb_any(cmd.meta.u.skb);
1269
1270         return rc;
1271 }
1272
1273 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1274                                         struct iwl3945_cmd *cmd,
1275                                         struct sk_buff *skb)
1276 {
1277         return 1;
1278 }
1279
1280 /*
1281  * CARD_STATE_CMD
1282  *
1283  * Use: Sets the device's internal card state to enable, disable, or halt
1284  *
1285  * When in the 'enable' state the card operates as normal.
1286  * When in the 'disable' state, the card enters into a low power mode.
1287  * When in the 'halt' state, the card is shut down and must be fully
1288  * restarted to come back on.
1289  */
1290 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1291 {
1292         struct iwl3945_host_cmd cmd = {
1293                 .id = REPLY_CARD_STATE_CMD,
1294                 .len = sizeof(u32),
1295                 .data = &flags,
1296                 .meta.flags = meta_flag,
1297         };
1298
1299         if (meta_flag & CMD_ASYNC)
1300                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1301
1302         return iwl3945_send_cmd(priv, &cmd);
1303 }
1304
1305 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1306                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1307 {
1308         struct iwl3945_rx_packet *res = NULL;
1309
1310         if (!skb) {
1311                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1312                 return 1;
1313         }
1314
1315         res = (struct iwl3945_rx_packet *)skb->data;
1316         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1317                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1318                           res->hdr.flags);
1319                 return 1;
1320         }
1321
1322         switch (res->u.add_sta.status) {
1323         case ADD_STA_SUCCESS_MSK:
1324                 break;
1325         default:
1326                 break;
1327         }
1328
1329         /* We didn't cache the SKB; let the caller free it */
1330         return 1;
1331 }
1332
1333 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1334                          struct iwl3945_addsta_cmd *sta, u8 flags)
1335 {
1336         struct iwl3945_rx_packet *res = NULL;
1337         int rc = 0;
1338         struct iwl3945_host_cmd cmd = {
1339                 .id = REPLY_ADD_STA,
1340                 .len = sizeof(struct iwl3945_addsta_cmd),
1341                 .meta.flags = flags,
1342                 .data = sta,
1343         };
1344
1345         if (flags & CMD_ASYNC)
1346                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1347         else
1348                 cmd.meta.flags |= CMD_WANT_SKB;
1349
1350         rc = iwl3945_send_cmd(priv, &cmd);
1351
1352         if (rc || (flags & CMD_ASYNC))
1353                 return rc;
1354
1355         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1356         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1357                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1358                           res->hdr.flags);
1359                 rc = -EIO;
1360         }
1361
1362         if (rc == 0) {
1363                 switch (res->u.add_sta.status) {
1364                 case ADD_STA_SUCCESS_MSK:
1365                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1366                         break;
1367                 default:
1368                         rc = -EIO;
1369                         IWL_WARNING("REPLY_ADD_STA failed\n");
1370                         break;
1371                 }
1372         }
1373
1374         priv->alloc_rxb_skb--;
1375         dev_kfree_skb_any(cmd.meta.u.skb);
1376
1377         return rc;
1378 }
1379
1380 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1381                                    struct ieee80211_key_conf *keyconf,
1382                                    u8 sta_id)
1383 {
1384         unsigned long flags;
1385         __le16 key_flags = 0;
1386
1387         switch (keyconf->alg) {
1388         case ALG_CCMP:
1389                 key_flags |= STA_KEY_FLG_CCMP;
1390                 key_flags |= cpu_to_le16(
1391                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1392                 key_flags &= ~STA_KEY_FLG_INVALID;
1393                 break;
1394         case ALG_TKIP:
1395         case ALG_WEP:
1396         default:
1397                 return -EINVAL;
1398         }
1399         spin_lock_irqsave(&priv->sta_lock, flags);
1400         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1401         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1402         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1403                keyconf->keylen);
1404
1405         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1406                keyconf->keylen);
1407         priv->stations[sta_id].sta.key.key_flags = key_flags;
1408         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1409         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410
1411         spin_unlock_irqrestore(&priv->sta_lock, flags);
1412
1413         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1414         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1415         return 0;
1416 }
1417
1418 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1419 {
1420         unsigned long flags;
1421
1422         spin_lock_irqsave(&priv->sta_lock, flags);
1423         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1424         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1425         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1426         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1427         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1428         spin_unlock_irqrestore(&priv->sta_lock, flags);
1429
1430         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1431         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1432         return 0;
1433 }
1434
1435 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1436 {
1437         struct list_head *element;
1438
1439         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1440                        priv->frames_count);
1441
1442         while (!list_empty(&priv->free_frames)) {
1443                 element = priv->free_frames.next;
1444                 list_del(element);
1445                 kfree(list_entry(element, struct iwl3945_frame, list));
1446                 priv->frames_count--;
1447         }
1448
1449         if (priv->frames_count) {
1450                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1451                             priv->frames_count);
1452                 priv->frames_count = 0;
1453         }
1454 }
1455
1456 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1457 {
1458         struct iwl3945_frame *frame;
1459         struct list_head *element;
1460         if (list_empty(&priv->free_frames)) {
1461                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1462                 if (!frame) {
1463                         IWL_ERROR("Could not allocate frame!\n");
1464                         return NULL;
1465                 }
1466
1467                 priv->frames_count++;
1468                 return frame;
1469         }
1470
1471         element = priv->free_frames.next;
1472         list_del(element);
1473         return list_entry(element, struct iwl3945_frame, list);
1474 }
1475
1476 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1477 {
1478         memset(frame, 0, sizeof(*frame));
1479         list_add(&frame->list, &priv->free_frames);
1480 }
1481
1482 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1483                                 struct ieee80211_hdr *hdr,
1484                                 const u8 *dest, int left)
1485 {
1486
1487         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1488             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1489              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1490                 return 0;
1491
1492         if (priv->ibss_beacon->len > left)
1493                 return 0;
1494
1495         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1496
1497         return priv->ibss_beacon->len;
1498 }
1499
1500 static int iwl3945_rate_index_from_plcp(int plcp)
1501 {
1502         int i = 0;
1503
1504         for (i = 0; i < IWL_RATE_COUNT; i++)
1505                 if (iwl3945_rates[i].plcp == plcp)
1506                         return i;
1507         return -1;
1508 }
1509
1510 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1511 {
1512         u8 i;
1513
1514         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1515              i = iwl3945_rates[i].next_ieee) {
1516                 if (rate_mask & (1 << i))
1517                         return iwl3945_rates[i].plcp;
1518         }
1519
1520         return IWL_RATE_INVALID;
1521 }
1522
1523 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1524 {
1525         struct iwl3945_frame *frame;
1526         unsigned int frame_size;
1527         int rc;
1528         u8 rate;
1529
1530         frame = iwl3945_get_free_frame(priv);
1531
1532         if (!frame) {
1533                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1534                           "command.\n");
1535                 return -ENOMEM;
1536         }
1537
1538         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1539                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1540                                                 0xFF0);
1541                 if (rate == IWL_INVALID_RATE)
1542                         rate = IWL_RATE_6M_PLCP;
1543         } else {
1544                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1545                 if (rate == IWL_INVALID_RATE)
1546                         rate = IWL_RATE_1M_PLCP;
1547         }
1548
1549         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1550
1551         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1552                               &frame->u.cmd[0]);
1553
1554         iwl3945_free_frame(priv, frame);
1555
1556         return rc;
1557 }
1558
1559 /******************************************************************************
1560  *
1561  * EEPROM related functions
1562  *
1563  ******************************************************************************/
1564
1565 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1566 {
1567         memcpy(mac, priv->eeprom.mac_address, 6);
1568 }
1569
1570 /**
1571  * iwl3945_eeprom_init - read EEPROM contents
1572  *
1573  * Load the EEPROM contents from adapter into priv->eeprom
1574  *
1575  * NOTE:  This routine uses the non-debug IO access functions.
1576  */
1577 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1578 {
1579         u16 *e = (u16 *)&priv->eeprom;
1580         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1581         u32 r;
1582         int sz = sizeof(priv->eeprom);
1583         int rc;
1584         int i;
1585         u16 addr;
1586
1587         /* The EEPROM structure has several padding buffers within it
1588          * and when adding new EEPROM maps is subject to programmer errors
1589          * which may be very difficult to identify without explicitly
1590          * checking the resulting size of the eeprom map. */
1591         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1592
1593         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1594                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1595                 return -ENOENT;
1596         }
1597
1598         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1599         rc = iwl3945_eeprom_acquire_semaphore(priv);
1600         if (rc < 0) {
1601                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1602                 return -ENOENT;
1603         }
1604
1605         /* eeprom is an array of 16bit values */
1606         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1607                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1608                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1609
1610                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1611                                         i += IWL_EEPROM_ACCESS_DELAY) {
1612                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1613                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1614                                 break;
1615                         udelay(IWL_EEPROM_ACCESS_DELAY);
1616                 }
1617
1618                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1619                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1620                         return -ETIMEDOUT;
1621                 }
1622                 e[addr / 2] = le16_to_cpu(r >> 16);
1623         }
1624
1625         return 0;
1626 }
1627
1628 /******************************************************************************
1629  *
1630  * Misc. internal state and helper functions
1631  *
1632  ******************************************************************************/
1633 #ifdef CONFIG_IWL3945_DEBUG
1634
1635 /**
1636  * iwl3945_report_frame - dump frame to syslog during debug sessions
1637  *
1638  * You may hack this function to show different aspects of received frames,
1639  * including selective frame dumps.
1640  * group100 parameter selects whether to show 1 out of 100 good frames.
1641  */
1642 void iwl3945_report_frame(struct iwl3945_priv *priv,
1643                       struct iwl3945_rx_packet *pkt,
1644                       struct ieee80211_hdr *header, int group100)
1645 {
1646         u32 to_us;
1647         u32 print_summary = 0;
1648         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1649         u32 hundred = 0;
1650         u32 dataframe = 0;
1651         u16 fc;
1652         u16 seq_ctl;
1653         u16 channel;
1654         u16 phy_flags;
1655         int rate_sym;
1656         u16 length;
1657         u16 status;
1658         u16 bcn_tmr;
1659         u32 tsf_low;
1660         u64 tsf;
1661         u8 rssi;
1662         u8 agc;
1663         u16 sig_avg;
1664         u16 noise_diff;
1665         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1666         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1667         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
1668         u8 *data = IWL_RX_DATA(pkt);
1669
1670         /* MAC header */
1671         fc = le16_to_cpu(header->frame_control);
1672         seq_ctl = le16_to_cpu(header->seq_ctrl);
1673
1674         /* metadata */
1675         channel = le16_to_cpu(rx_hdr->channel);
1676         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1677         rate_sym = rx_hdr->rate;
1678         length = le16_to_cpu(rx_hdr->len);
1679
1680         /* end-of-frame status and timestamp */
1681         status = le32_to_cpu(rx_end->status);
1682         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1683         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1684         tsf = le64_to_cpu(rx_end->timestamp);
1685
1686         /* signal statistics */
1687         rssi = rx_stats->rssi;
1688         agc = rx_stats->agc;
1689         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1690         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1691
1692         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1693
1694         /* if data frame is to us and all is good,
1695          *   (optionally) print summary for only 1 out of every 100 */
1696         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1697             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1698                 dataframe = 1;
1699                 if (!group100)
1700                         print_summary = 1;      /* print each frame */
1701                 else if (priv->framecnt_to_us < 100) {
1702                         priv->framecnt_to_us++;
1703                         print_summary = 0;
1704                 } else {
1705                         priv->framecnt_to_us = 0;
1706                         print_summary = 1;
1707                         hundred = 1;
1708                 }
1709         } else {
1710                 /* print summary for all other frames */
1711                 print_summary = 1;
1712         }
1713
1714         if (print_summary) {
1715                 char *title;
1716                 u32 rate;
1717
1718                 if (hundred)
1719                         title = "100Frames";
1720                 else if (fc & IEEE80211_FCTL_RETRY)
1721                         title = "Retry";
1722                 else if (ieee80211_is_assoc_response(fc))
1723                         title = "AscRsp";
1724                 else if (ieee80211_is_reassoc_response(fc))
1725                         title = "RasRsp";
1726                 else if (ieee80211_is_probe_response(fc)) {
1727                         title = "PrbRsp";
1728                         print_dump = 1; /* dump frame contents */
1729                 } else if (ieee80211_is_beacon(fc)) {
1730                         title = "Beacon";
1731                         print_dump = 1; /* dump frame contents */
1732                 } else if (ieee80211_is_atim(fc))
1733                         title = "ATIM";
1734                 else if (ieee80211_is_auth(fc))
1735                         title = "Auth";
1736                 else if (ieee80211_is_deauth(fc))
1737                         title = "DeAuth";
1738                 else if (ieee80211_is_disassoc(fc))
1739                         title = "DisAssoc";
1740                 else
1741                         title = "Frame";
1742
1743                 rate = iwl3945_rate_index_from_plcp(rate_sym);
1744                 if (rate == -1)
1745                         rate = 0;
1746                 else
1747                         rate = iwl3945_rates[rate].ieee / 2;
1748
1749                 /* print frame summary.
1750                  * MAC addresses show just the last byte (for brevity),
1751                  *    but you can hack it to show more, if you'd like to. */
1752                 if (dataframe)
1753                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1754                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1755                                      title, fc, header->addr1[5],
1756                                      length, rssi, channel, rate);
1757                 else {
1758                         /* src/dst addresses assume managed mode */
1759                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1760                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1761                                      "phy=0x%02x, chnl=%d\n",
1762                                      title, fc, header->addr1[5],
1763                                      header->addr3[5], rssi,
1764                                      tsf_low - priv->scan_start_tsf,
1765                                      phy_flags, channel);
1766                 }
1767         }
1768         if (print_dump)
1769                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
1770 }
1771 #endif
1772
1773 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1774 {
1775         if (priv->hw_setting.shared_virt)
1776                 pci_free_consistent(priv->pci_dev,
1777                                     sizeof(struct iwl3945_shared),
1778                                     priv->hw_setting.shared_virt,
1779                                     priv->hw_setting.shared_phys);
1780 }
1781
1782 /**
1783  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1784  *
1785  * return : set the bit for each supported rate insert in ie
1786  */
1787 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1788                                     u16 basic_rate, int *left)
1789 {
1790         u16 ret_rates = 0, bit;
1791         int i;
1792         u8 *cnt = ie;
1793         u8 *rates = ie + 1;
1794
1795         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1796                 if (bit & supported_rate) {
1797                         ret_rates |= bit;
1798                         rates[*cnt] = iwl3945_rates[i].ieee |
1799                                 ((bit & basic_rate) ? 0x80 : 0x00);
1800                         (*cnt)++;
1801                         (*left)--;
1802                         if ((*left <= 0) ||
1803                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1804                                 break;
1805                 }
1806         }
1807
1808         return ret_rates;
1809 }
1810
1811 /**
1812  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1813  */
1814 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1815                               struct ieee80211_mgmt *frame,
1816                               int left, int is_direct)
1817 {
1818         int len = 0;
1819         u8 *pos = NULL;
1820         u16 active_rates, ret_rates, cck_rates;
1821
1822         /* Make sure there is enough space for the probe request,
1823          * two mandatory IEs and the data */
1824         left -= 24;
1825         if (left < 0)
1826                 return 0;
1827         len += 24;
1828
1829         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1830         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1831         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1832         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1833         frame->seq_ctrl = 0;
1834
1835         /* fill in our indirect SSID IE */
1836         /* ...next IE... */
1837
1838         left -= 2;
1839         if (left < 0)
1840                 return 0;
1841         len += 2;
1842         pos = &(frame->u.probe_req.variable[0]);
1843         *pos++ = WLAN_EID_SSID;
1844         *pos++ = 0;
1845
1846         /* fill in our direct SSID IE... */
1847         if (is_direct) {
1848                 /* ...next IE... */
1849                 left -= 2 + priv->essid_len;
1850                 if (left < 0)
1851                         return 0;
1852                 /* ... fill it in... */
1853                 *pos++ = WLAN_EID_SSID;
1854                 *pos++ = priv->essid_len;
1855                 memcpy(pos, priv->essid, priv->essid_len);
1856                 pos += priv->essid_len;
1857                 len += 2 + priv->essid_len;
1858         }
1859
1860         /* fill in supported rate */
1861         /* ...next IE... */
1862         left -= 2;
1863         if (left < 0)
1864                 return 0;
1865
1866         /* ... fill it in... */
1867         *pos++ = WLAN_EID_SUPP_RATES;
1868         *pos = 0;
1869
1870         priv->active_rate = priv->rates_mask;
1871         active_rates = priv->active_rate;
1872         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1873
1874         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1875         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1876                         priv->active_rate_basic, &left);
1877         active_rates &= ~ret_rates;
1878
1879         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1880                                  priv->active_rate_basic, &left);
1881         active_rates &= ~ret_rates;
1882
1883         len += 2 + *pos;
1884         pos += (*pos) + 1;
1885         if (active_rates == 0)
1886                 goto fill_end;
1887
1888         /* fill in supported extended rate */
1889         /* ...next IE... */
1890         left -= 2;
1891         if (left < 0)
1892                 return 0;
1893         /* ... fill it in... */
1894         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1895         *pos = 0;
1896         iwl3945_supported_rate_to_ie(pos, active_rates,
1897                                  priv->active_rate_basic, &left);
1898         if (*pos > 0)
1899                 len += 2 + *pos;
1900
1901  fill_end:
1902         return (u16)len;
1903 }
1904
1905 /*
1906  * QoS  support
1907 */
1908 #ifdef CONFIG_IWL3945_QOS
1909 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1910                                        struct iwl3945_qosparam_cmd *qos)
1911 {
1912
1913         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1914                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1915 }
1916
1917 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1918 {
1919         u16 cw_min = 15;
1920         u16 cw_max = 1023;
1921         u8 aifs = 2;
1922         u8 is_legacy = 0;
1923         unsigned long flags;
1924         int i;
1925
1926         spin_lock_irqsave(&priv->lock, flags);
1927         priv->qos_data.qos_active = 0;
1928
1929         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1930                 if (priv->qos_data.qos_enable)
1931                         priv->qos_data.qos_active = 1;
1932                 if (!(priv->active_rate & 0xfff0)) {
1933                         cw_min = 31;
1934                         is_legacy = 1;
1935                 }
1936         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1937                 if (priv->qos_data.qos_enable)
1938                         priv->qos_data.qos_active = 1;
1939         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1940                 cw_min = 31;
1941                 is_legacy = 1;
1942         }
1943
1944         if (priv->qos_data.qos_active)
1945                 aifs = 3;
1946
1947         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1948         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1949         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1950         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1951         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1952
1953         if (priv->qos_data.qos_active) {
1954                 i = 1;
1955                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1956                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1957                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1958                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1959                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1960
1961                 i = 2;
1962                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1963                         cpu_to_le16((cw_min + 1) / 2 - 1);
1964                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1965                         cpu_to_le16(cw_max);
1966                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1967                 if (is_legacy)
1968                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1969                                 cpu_to_le16(6016);
1970                 else
1971                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1972                                 cpu_to_le16(3008);
1973                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1974
1975                 i = 3;
1976                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1977                         cpu_to_le16((cw_min + 1) / 4 - 1);
1978                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1979                         cpu_to_le16((cw_max + 1) / 2 - 1);
1980                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1981                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1982                 if (is_legacy)
1983                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1984                                 cpu_to_le16(3264);
1985                 else
1986                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1987                                 cpu_to_le16(1504);
1988         } else {
1989                 for (i = 1; i < 4; i++) {
1990                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1991                                 cpu_to_le16(cw_min);
1992                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1993                                 cpu_to_le16(cw_max);
1994                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1995                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1996                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1997                 }
1998         }
1999         IWL_DEBUG_QOS("set QoS to default \n");
2000
2001         spin_unlock_irqrestore(&priv->lock, flags);
2002 }
2003
2004 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
2005 {
2006         unsigned long flags;
2007
2008         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2009                 return;
2010
2011         if (!priv->qos_data.qos_enable)
2012                 return;
2013
2014         spin_lock_irqsave(&priv->lock, flags);
2015         priv->qos_data.def_qos_parm.qos_flags = 0;
2016
2017         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2018             !priv->qos_data.qos_cap.q_AP.txop_request)
2019                 priv->qos_data.def_qos_parm.qos_flags |=
2020                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2021
2022         if (priv->qos_data.qos_active)
2023                 priv->qos_data.def_qos_parm.qos_flags |=
2024                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2025
2026         spin_unlock_irqrestore(&priv->lock, flags);
2027
2028         if (force || iwl3945_is_associated(priv)) {
2029                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2030                               priv->qos_data.qos_active);
2031
2032                 iwl3945_send_qos_params_command(priv,
2033                                 &(priv->qos_data.def_qos_parm));
2034         }
2035 }
2036
2037 #endif /* CONFIG_IWL3945_QOS */
2038 /*
2039  * Power management (not Tx power!) functions
2040  */
2041 #define MSEC_TO_USEC 1024
2042
2043 #define NOSLP __constant_cpu_to_le32(0)
2044 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2045 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2046 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2047                                      __constant_cpu_to_le32(X1), \
2048                                      __constant_cpu_to_le32(X2), \
2049                                      __constant_cpu_to_le32(X3), \
2050                                      __constant_cpu_to_le32(X4)}
2051
2052
2053 /* default power management (not Tx power) table values */
2054 /* for tim  0-10 */
2055 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
2056         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2057         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2058         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2059         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2060         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2061         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2062 };
2063
2064 /* for tim > 10 */
2065 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
2066         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2067         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2068                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2069         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2070                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2071         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2072                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2073         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2074         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2075                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2076 };
2077
2078 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
2079 {
2080         int rc = 0, i;
2081         struct iwl3945_power_mgr *pow_data;
2082         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
2083         u16 pci_pm;
2084
2085         IWL_DEBUG_POWER("Initialize power \n");
2086
2087         pow_data = &(priv->power_data);
2088
2089         memset(pow_data, 0, sizeof(*pow_data));
2090
2091         pow_data->active_index = IWL_POWER_RANGE_0;
2092         pow_data->dtim_val = 0xffff;
2093
2094         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2095         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2096
2097         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2098         if (rc != 0)
2099                 return 0;
2100         else {
2101                 struct iwl3945_powertable_cmd *cmd;
2102
2103                 IWL_DEBUG_POWER("adjust power command flags\n");
2104
2105                 for (i = 0; i < IWL_POWER_AC; i++) {
2106                         cmd = &pow_data->pwr_range_0[i].cmd;
2107
2108                         if (pci_pm & 0x1)
2109                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2110                         else
2111                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2112                 }
2113         }
2114         return rc;
2115 }
2116
2117 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
2118                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
2119 {
2120         int rc = 0, i;
2121         u8 skip;
2122         u32 max_sleep = 0;
2123         struct iwl3945_power_vec_entry *range;
2124         u8 period = 0;
2125         struct iwl3945_power_mgr *pow_data;
2126
2127         if (mode > IWL_POWER_INDEX_5) {
2128                 IWL_DEBUG_POWER("Error invalid power mode \n");
2129                 return -1;
2130         }
2131         pow_data = &(priv->power_data);
2132
2133         if (pow_data->active_index == IWL_POWER_RANGE_0)
2134                 range = &pow_data->pwr_range_0[0];
2135         else
2136                 range = &pow_data->pwr_range_1[1];
2137
2138         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
2139
2140 #ifdef IWL_MAC80211_DISABLE
2141         if (priv->assoc_network != NULL) {
2142                 unsigned long flags;
2143
2144                 period = priv->assoc_network->tim.tim_period;
2145         }
2146 #endif  /*IWL_MAC80211_DISABLE */
2147         skip = range[mode].no_dtim;
2148
2149         if (period == 0) {
2150                 period = 1;
2151                 skip = 0;
2152         }
2153
2154         if (skip == 0) {
2155                 max_sleep = period;
2156                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2157         } else {
2158                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2159                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2160                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2161         }
2162
2163         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2164                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2165                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2166         }
2167
2168         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2169         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2170         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2171         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2172                         le32_to_cpu(cmd->sleep_interval[0]),
2173                         le32_to_cpu(cmd->sleep_interval[1]),
2174                         le32_to_cpu(cmd->sleep_interval[2]),
2175                         le32_to_cpu(cmd->sleep_interval[3]),
2176                         le32_to_cpu(cmd->sleep_interval[4]));
2177
2178         return rc;
2179 }
2180
2181 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2182 {
2183         u32 uninitialized_var(final_mode);
2184         int rc;
2185         struct iwl3945_powertable_cmd cmd;
2186
2187         /* If on battery, set to 3,
2188          * if plugged into AC power, set to CAM ("continuously aware mode"),
2189          * else user level */
2190         switch (mode) {
2191         case IWL_POWER_BATTERY:
2192                 final_mode = IWL_POWER_INDEX_3;
2193                 break;
2194         case IWL_POWER_AC:
2195                 final_mode = IWL_POWER_MODE_CAM;
2196                 break;
2197         default:
2198                 final_mode = mode;
2199                 break;
2200         }
2201
2202         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2203
2204         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2205
2206         if (final_mode == IWL_POWER_MODE_CAM)
2207                 clear_bit(STATUS_POWER_PMI, &priv->status);
2208         else
2209                 set_bit(STATUS_POWER_PMI, &priv->status);
2210
2211         return rc;
2212 }
2213
2214 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2215 {
2216         /* Filter incoming packets to determine if they are targeted toward
2217          * this network, discarding packets coming from ourselves */
2218         switch (priv->iw_mode) {
2219         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2220                 /* packets from our adapter are dropped (echo) */
2221                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2222                         return 0;
2223                 /* {broad,multi}cast packets to our IBSS go through */
2224                 if (is_multicast_ether_addr(header->addr1))
2225                         return !compare_ether_addr(header->addr3, priv->bssid);
2226                 /* packets to our adapter go through */
2227                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2228         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2229                 /* packets from our adapter are dropped (echo) */
2230                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2231                         return 0;
2232                 /* {broad,multi}cast packets to our BSS go through */
2233                 if (is_multicast_ether_addr(header->addr1))
2234                         return !compare_ether_addr(header->addr2, priv->bssid);
2235                 /* packets to our adapter go through */
2236                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2237         }
2238
2239         return 1;
2240 }
2241
2242 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2243
2244 static const char *iwl3945_get_tx_fail_reason(u32 status)
2245 {
2246         switch (status & TX_STATUS_MSK) {
2247         case TX_STATUS_SUCCESS:
2248                 return "SUCCESS";
2249                 TX_STATUS_ENTRY(SHORT_LIMIT);
2250                 TX_STATUS_ENTRY(LONG_LIMIT);
2251                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2252                 TX_STATUS_ENTRY(MGMNT_ABORT);
2253                 TX_STATUS_ENTRY(NEXT_FRAG);
2254                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2255                 TX_STATUS_ENTRY(DEST_PS);
2256                 TX_STATUS_ENTRY(ABORTED);
2257                 TX_STATUS_ENTRY(BT_RETRY);
2258                 TX_STATUS_ENTRY(STA_INVALID);
2259                 TX_STATUS_ENTRY(FRAG_DROPPED);
2260                 TX_STATUS_ENTRY(TID_DISABLE);
2261                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2262                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2263                 TX_STATUS_ENTRY(TX_LOCKED);
2264                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2265         }
2266
2267         return "UNKNOWN";
2268 }
2269
2270 /**
2271  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2272  *
2273  * NOTE: priv->mutex is not required before calling this function
2274  */
2275 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2276 {
2277         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2278                 clear_bit(STATUS_SCANNING, &priv->status);
2279                 return 0;
2280         }
2281
2282         if (test_bit(STATUS_SCANNING, &priv->status)) {
2283                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2284                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2285                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2286                         queue_work(priv->workqueue, &priv->abort_scan);
2287
2288                 } else
2289                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2290
2291                 return test_bit(STATUS_SCANNING, &priv->status);
2292         }
2293
2294         return 0;
2295 }
2296
2297 /**
2298  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2299  * @ms: amount of time to wait (in milliseconds) for scan to abort
2300  *
2301  * NOTE: priv->mutex must be held before calling this function
2302  */
2303 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2304 {
2305         unsigned long now = jiffies;
2306         int ret;
2307
2308         ret = iwl3945_scan_cancel(priv);
2309         if (ret && ms) {
2310                 mutex_unlock(&priv->mutex);
2311                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2312                                 test_bit(STATUS_SCANNING, &priv->status))
2313                         msleep(1);
2314                 mutex_lock(&priv->mutex);
2315
2316                 return test_bit(STATUS_SCANNING, &priv->status);
2317         }
2318
2319         return ret;
2320 }
2321
2322 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2323 {
2324         /* Reset ieee stats */
2325
2326         /* We don't reset the net_device_stats (ieee->stats) on
2327          * re-association */
2328
2329         priv->last_seq_num = -1;
2330         priv->last_frag_num = -1;
2331         priv->last_packet_time = 0;
2332
2333         iwl3945_scan_cancel(priv);
2334 }
2335
2336 #define MAX_UCODE_BEACON_INTERVAL       1024
2337 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2338
2339 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2340 {
2341         u16 new_val = 0;
2342         u16 beacon_factor = 0;
2343
2344         beacon_factor =
2345             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2346                 / MAX_UCODE_BEACON_INTERVAL;
2347         new_val = beacon_val / beacon_factor;
2348
2349         return cpu_to_le16(new_val);
2350 }
2351
2352 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2353 {
2354         u64 interval_tm_unit;
2355         u64 tsf, result;
2356         unsigned long flags;
2357         struct ieee80211_conf *conf = NULL;
2358         u16 beacon_int = 0;
2359
2360         conf = ieee80211_get_hw_conf(priv->hw);
2361
2362         spin_lock_irqsave(&priv->lock, flags);
2363         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2364         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2365
2366         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2367
2368         tsf = priv->timestamp1;
2369         tsf = ((tsf << 32) | priv->timestamp0);
2370
2371         beacon_int = priv->beacon_int;
2372         spin_unlock_irqrestore(&priv->lock, flags);
2373
2374         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2375                 if (beacon_int == 0) {
2376                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2377                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2378                 } else {
2379                         priv->rxon_timing.beacon_interval =
2380                                 cpu_to_le16(beacon_int);
2381                         priv->rxon_timing.beacon_interval =
2382                             iwl3945_adjust_beacon_interval(
2383                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2384                 }
2385
2386                 priv->rxon_timing.atim_window = 0;
2387         } else {
2388                 priv->rxon_timing.beacon_interval =
2389                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2390                 /* TODO: we need to get atim_window from upper stack
2391                  * for now we set to 0 */
2392                 priv->rxon_timing.atim_window = 0;
2393         }
2394
2395         interval_tm_unit =
2396                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2397         result = do_div(tsf, interval_tm_unit);
2398         priv->rxon_timing.beacon_init_val =
2399             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2400
2401         IWL_DEBUG_ASSOC
2402             ("beacon interval %d beacon timer %d beacon tim %d\n",
2403                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2404                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2405                 le16_to_cpu(priv->rxon_timing.atim_window));
2406 }
2407
2408 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2409 {
2410         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2411                 IWL_ERROR("APs don't scan.\n");
2412                 return 0;
2413         }
2414
2415         if (!iwl3945_is_ready_rf(priv)) {
2416                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2417                 return -EIO;
2418         }
2419
2420         if (test_bit(STATUS_SCANNING, &priv->status)) {
2421                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2422                 return -EAGAIN;
2423         }
2424
2425         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2426                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2427                                "Queuing.\n");
2428                 return -EAGAIN;
2429         }
2430
2431         IWL_DEBUG_INFO("Starting scan...\n");
2432         priv->scan_bands = 2;
2433         set_bit(STATUS_SCANNING, &priv->status);
2434         priv->scan_start = jiffies;
2435         priv->scan_pass_start = priv->scan_start;
2436
2437         queue_work(priv->workqueue, &priv->request_scan);
2438
2439         return 0;
2440 }
2441
2442 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2443 {
2444         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2445
2446         if (hw_decrypt)
2447                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2448         else
2449                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2450
2451         return 0;
2452 }
2453
2454 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv, u8 phymode)
2455 {
2456         if (phymode == MODE_IEEE80211A) {
2457                 priv->staging_rxon.flags &=
2458                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2459                       | RXON_FLG_CCK_MSK);
2460                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2461         } else {
2462                 /* Copied from iwl3945_bg_post_associate() */
2463                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2464                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2465                 else
2466                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2467
2468                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2469                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2470
2471                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2472                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2473                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2474         }
2475 }
2476
2477 /*
2478  * initialize rxon structure with default values from eeprom
2479  */
2480 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2481 {
2482         const struct iwl3945_channel_info *ch_info;
2483
2484         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2485
2486         switch (priv->iw_mode) {
2487         case IEEE80211_IF_TYPE_AP:
2488                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2489                 break;
2490
2491         case IEEE80211_IF_TYPE_STA:
2492                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2493                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2494                 break;
2495
2496         case IEEE80211_IF_TYPE_IBSS:
2497                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2498                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2499                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2500                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2501                 break;
2502
2503         case IEEE80211_IF_TYPE_MNTR:
2504                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2505                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2506                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2507                 break;
2508         }
2509
2510 #if 0
2511         /* TODO:  Figure out when short_preamble would be set and cache from
2512          * that */
2513         if (!hw_to_local(priv->hw)->short_preamble)
2514                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2515         else
2516                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2517 #endif
2518
2519         ch_info = iwl3945_get_channel_info(priv, priv->phymode,
2520                                        le16_to_cpu(priv->staging_rxon.channel));
2521
2522         if (!ch_info)
2523                 ch_info = &priv->channel_info[0];
2524
2525         /*
2526          * in some case A channels are all non IBSS
2527          * in this case force B/G channel
2528          */
2529         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2530             !(is_channel_ibss(ch_info)))
2531                 ch_info = &priv->channel_info[0];
2532
2533         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2534         if (is_channel_a_band(ch_info))
2535                 priv->phymode = MODE_IEEE80211A;
2536         else
2537                 priv->phymode = MODE_IEEE80211G;
2538
2539         iwl3945_set_flags_for_phymode(priv, priv->phymode);
2540
2541         priv->staging_rxon.ofdm_basic_rates =
2542             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2543         priv->staging_rxon.cck_basic_rates =
2544             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2545 }
2546
2547 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2548 {
2549         if (!iwl3945_is_ready_rf(priv))
2550                 return -EAGAIN;
2551
2552         if (mode == IEEE80211_IF_TYPE_IBSS) {
2553                 const struct iwl3945_channel_info *ch_info;
2554
2555                 ch_info = iwl3945_get_channel_info(priv,
2556                         priv->phymode,
2557                         le16_to_cpu(priv->staging_rxon.channel));
2558
2559                 if (!ch_info || !is_channel_ibss(ch_info)) {
2560                         IWL_ERROR("channel %d not IBSS channel\n",
2561                                   le16_to_cpu(priv->staging_rxon.channel));
2562                         return -EINVAL;
2563                 }
2564         }
2565
2566         cancel_delayed_work(&priv->scan_check);
2567         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2568                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2569                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2570                 return -EAGAIN;
2571         }
2572
2573         priv->iw_mode = mode;
2574
2575         iwl3945_connection_init_rx_config(priv);
2576         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2577
2578         iwl3945_clear_stations_table(priv);
2579
2580         iwl3945_commit_rxon(priv);
2581
2582         return 0;
2583 }
2584
2585 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2586                                       struct ieee80211_tx_control *ctl,
2587                                       struct iwl3945_cmd *cmd,
2588                                       struct sk_buff *skb_frag,
2589                                       int last_frag)
2590 {
2591         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2592
2593         switch (keyinfo->alg) {
2594         case ALG_CCMP:
2595                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2596                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2597                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2598                 break;
2599
2600         case ALG_TKIP:
2601 #if 0
2602                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2603
2604                 if (last_frag)
2605                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2606                                8);
2607                 else
2608                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2609 #endif
2610                 break;
2611
2612         case ALG_WEP:
2613                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2614                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2615
2616                 if (keyinfo->keylen == 13)
2617                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2618
2619                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2620
2621                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2622                              "with key %d\n", ctl->key_idx);
2623                 break;
2624
2625         default:
2626                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2627                 break;
2628         }
2629 }
2630
2631 /*
2632  * handle build REPLY_TX command notification.
2633  */
2634 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2635                                   struct iwl3945_cmd *cmd,
2636                                   struct ieee80211_tx_control *ctrl,
2637                                   struct ieee80211_hdr *hdr,
2638                                   int is_unicast, u8 std_id)
2639 {
2640         __le16 *qc;
2641         u16 fc = le16_to_cpu(hdr->frame_control);
2642         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2643
2644         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2645         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2646                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2647                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2648                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2649                 if (ieee80211_is_probe_response(fc) &&
2650                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2651                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2652         } else {
2653                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2654                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2655         }
2656
2657         cmd->cmd.tx.sta_id = std_id;
2658         if (ieee80211_get_morefrag(hdr))
2659                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2660
2661         qc = ieee80211_get_qos_ctrl(hdr);
2662         if (qc) {
2663                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2664                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2665         } else
2666                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2667
2668         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2669                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2670                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2671         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2672                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2673                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2674         }
2675
2676         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2677                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2678
2679         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2680         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2681                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2682                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2683                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2684                 else
2685                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2686         } else
2687                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2688
2689         cmd->cmd.tx.driver_txop = 0;
2690         cmd->cmd.tx.tx_flags = tx_flags;
2691         cmd->cmd.tx.next_frame_len = 0;
2692 }
2693
2694 /**
2695  * iwl3945_get_sta_id - Find station's index within station table
2696  */
2697 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2698 {
2699         int sta_id;
2700         u16 fc = le16_to_cpu(hdr->frame_control);
2701
2702         /* If this frame is broadcast or management, use broadcast station id */
2703         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2704             is_multicast_ether_addr(hdr->addr1))
2705                 return priv->hw_setting.bcast_sta_id;
2706
2707         switch (priv->iw_mode) {
2708
2709         /* If we are a client station in a BSS network, use the special
2710          * AP station entry (that's the only station we communicate with) */
2711         case IEEE80211_IF_TYPE_STA:
2712                 return IWL_AP_ID;
2713
2714         /* If we are an AP, then find the station, or use BCAST */
2715         case IEEE80211_IF_TYPE_AP:
2716                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2717                 if (sta_id != IWL_INVALID_STATION)
2718                         return sta_id;
2719                 return priv->hw_setting.bcast_sta_id;
2720
2721         /* If this frame is going out to an IBSS network, find the station,
2722          * or create a new station table entry */
2723         case IEEE80211_IF_TYPE_IBSS: {
2724                 DECLARE_MAC_BUF(mac);
2725
2726                 /* Create new station table entry */
2727                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2728                 if (sta_id != IWL_INVALID_STATION)
2729                         return sta_id;
2730
2731                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2732
2733                 if (sta_id != IWL_INVALID_STATION)
2734                         return sta_id;
2735
2736                 IWL_DEBUG_DROP("Station %s not in station map. "
2737                                "Defaulting to broadcast...\n",
2738                                print_mac(mac, hdr->addr1));
2739                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2740                 return priv->hw_setting.bcast_sta_id;
2741         }
2742         default:
2743                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2744                 return priv->hw_setting.bcast_sta_id;
2745         }
2746 }
2747
2748 /*
2749  * start REPLY_TX command process
2750  */
2751 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2752                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2753 {
2754         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2755         struct iwl3945_tfd_frame *tfd;
2756         u32 *control_flags;
2757         int txq_id = ctl->queue;
2758         struct iwl3945_tx_queue *txq = NULL;
2759         struct iwl3945_queue *q = NULL;
2760         dma_addr_t phys_addr;
2761         dma_addr_t txcmd_phys;
2762         struct iwl3945_cmd *out_cmd = NULL;
2763         u16 len, idx, len_org;
2764         u8 id, hdr_len, unicast;
2765         u8 sta_id;
2766         u16 seq_number = 0;
2767         u16 fc;
2768         __le16 *qc;
2769         u8 wait_write_ptr = 0;
2770         unsigned long flags;
2771         int rc;
2772
2773         spin_lock_irqsave(&priv->lock, flags);
2774         if (iwl3945_is_rfkill(priv)) {
2775                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2776                 goto drop_unlock;
2777         }
2778
2779         if (!priv->interface_id) {
2780                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2781                 goto drop_unlock;
2782         }
2783
2784         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2785                 IWL_ERROR("ERROR: No TX rate available.\n");
2786                 goto drop_unlock;
2787         }
2788
2789         unicast = !is_multicast_ether_addr(hdr->addr1);
2790         id = 0;
2791
2792         fc = le16_to_cpu(hdr->frame_control);
2793
2794 #ifdef CONFIG_IWL3945_DEBUG
2795         if (ieee80211_is_auth(fc))
2796                 IWL_DEBUG_TX("Sending AUTH frame\n");
2797         else if (ieee80211_is_assoc_request(fc))
2798                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2799         else if (ieee80211_is_reassoc_request(fc))
2800                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2801 #endif
2802
2803         if (!iwl3945_is_associated(priv) &&
2804             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2805                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2806                 goto drop_unlock;
2807         }
2808
2809         spin_unlock_irqrestore(&priv->lock, flags);
2810
2811         hdr_len = ieee80211_get_hdrlen(fc);
2812
2813         /* Find (or create) index into station table for destination station */
2814         sta_id = iwl3945_get_sta_id(priv, hdr);
2815         if (sta_id == IWL_INVALID_STATION) {
2816                 DECLARE_MAC_BUF(mac);
2817
2818                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2819                                print_mac(mac, hdr->addr1));
2820                 goto drop;
2821         }
2822
2823         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2824
2825         qc = ieee80211_get_qos_ctrl(hdr);
2826         if (qc) {
2827                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2828                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2829                                 IEEE80211_SCTL_SEQ;
2830                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2831                         (hdr->seq_ctrl &
2832                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2833                 seq_number += 0x10;
2834         }
2835
2836         /* Descriptor for chosen Tx queue */
2837         txq = &priv->txq[txq_id];
2838         q = &txq->q;
2839
2840         spin_lock_irqsave(&priv->lock, flags);
2841
2842         /* Set up first empty TFD within this queue's circular TFD buffer */
2843         tfd = &txq->bd[q->write_ptr];
2844         memset(tfd, 0, sizeof(*tfd));
2845         control_flags = (u32 *) tfd;
2846         idx = get_cmd_index(q, q->write_ptr, 0);
2847
2848         /* Set up driver data for this TFD */
2849         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2850         txq->txb[q->write_ptr].skb[0] = skb;
2851         memcpy(&(txq->txb[q->write_ptr].status.control),
2852                ctl, sizeof(struct ieee80211_tx_control));
2853
2854         /* Init first empty entry in queue's array of Tx/cmd buffers */
2855         out_cmd = &txq->cmd[idx];
2856         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2857         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2858
2859         /*
2860          * Set up the Tx-command (not MAC!) header.
2861          * Store the chosen Tx queue and TFD index within the sequence field;
2862          * after Tx, uCode's Tx response will return this value so driver can
2863          * locate the frame within the tx queue and do post-tx processing.
2864          */
2865         out_cmd->hdr.cmd = REPLY_TX;
2866         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2867                                 INDEX_TO_SEQ(q->write_ptr)));
2868
2869         /* Copy MAC header from skb into command buffer */
2870         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2871
2872         /*
2873          * Use the first empty entry in this queue's command buffer array
2874          * to contain the Tx command and MAC header concatenated together
2875          * (payload data will be in another buffer).
2876          * Size of this varies, due to varying MAC header length.
2877          * If end is not dword aligned, we'll have 2 extra bytes at the end
2878          * of the MAC header (device reads on dword boundaries).
2879          * We'll tell device about this padding later.
2880          */
2881         len = priv->hw_setting.tx_cmd_len +
2882                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2883
2884         len_org = len;
2885         len = (len + 3) & ~3;
2886
2887         if (len_org != len)
2888                 len_org = 1;
2889         else
2890                 len_org = 0;
2891
2892         /* Physical address of this Tx command's header (not MAC header!),
2893          * within command buffer array. */
2894         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2895                      offsetof(struct iwl3945_cmd, hdr);
2896
2897         /* Add buffer containing Tx command and MAC(!) header to TFD's
2898          * first entry */
2899         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2900
2901         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2902                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2903
2904         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2905          * if any (802.11 null frames have no payload). */
2906         len = skb->len - hdr_len;
2907         if (len) {
2908                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2909                                            len, PCI_DMA_TODEVICE);
2910                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2911         }
2912
2913         if (!len)
2914                 /* If there is no payload, then we use only one Tx buffer */
2915                 *control_flags = TFD_CTL_COUNT_SET(1);
2916         else
2917                 /* Else use 2 buffers.
2918                  * Tell 3945 about any padding after MAC header */
2919                 *control_flags = TFD_CTL_COUNT_SET(2) |
2920                         TFD_CTL_PAD_SET(U32_PAD(len));
2921
2922         /* Total # bytes to be transmitted */
2923         len = (u16)skb->len;
2924         out_cmd->cmd.tx.len = cpu_to_le16(len);
2925
2926         /* TODO need this for burst mode later on */
2927         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2928
2929         /* set is_hcca to 0; it probably will never be implemented */
2930         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2931
2932         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2933         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2934
2935         if (!ieee80211_get_morefrag(hdr)) {
2936                 txq->need_update = 1;
2937                 if (qc) {
2938                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2939                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2940                 }
2941         } else {
2942                 wait_write_ptr = 1;
2943                 txq->need_update = 0;
2944         }
2945
2946         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2947                            sizeof(out_cmd->cmd.tx));
2948
2949         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2950                            ieee80211_get_hdrlen(fc));
2951
2952         /* Tell device the write index *just past* this latest filled TFD */
2953         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
2954         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2955         spin_unlock_irqrestore(&priv->lock, flags);
2956
2957         if (rc)
2958                 return rc;
2959
2960         if ((iwl3945_queue_space(q) < q->high_mark)
2961             && priv->mac80211_registered) {
2962                 if (wait_write_ptr) {
2963                         spin_lock_irqsave(&priv->lock, flags);
2964                         txq->need_update = 1;
2965                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2966                         spin_unlock_irqrestore(&priv->lock, flags);
2967                 }
2968
2969                 ieee80211_stop_queue(priv->hw, ctl->queue);
2970         }
2971
2972         return 0;
2973
2974 drop_unlock:
2975         spin_unlock_irqrestore(&priv->lock, flags);
2976 drop:
2977         return -1;
2978 }
2979
2980 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2981 {
2982         const struct ieee80211_hw_mode *hw = NULL;
2983         struct ieee80211_rate *rate;
2984         int i;
2985
2986         hw = iwl3945_get_hw_mode(priv, priv->phymode);
2987         if (!hw) {
2988                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2989                 return;
2990         }
2991
2992         priv->active_rate = 0;
2993         priv->active_rate_basic = 0;
2994
2995         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2996                        hw->mode == MODE_IEEE80211A ?
2997                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2998
2999         for (i = 0; i < hw->num_rates; i++) {
3000                 rate = &(hw->rates[i]);
3001                 if ((rate->val < IWL_RATE_COUNT) &&
3002                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3003                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3004                                        rate->val, iwl3945_rates[rate->val].plcp,
3005                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3006                                        "*" : "");
3007                         priv->active_rate |= (1 << rate->val);
3008                         if (rate->flags & IEEE80211_RATE_BASIC)
3009                                 priv->active_rate_basic |= (1 << rate->val);
3010                 } else
3011                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3012                                        rate->val, iwl3945_rates[rate->val].plcp);
3013         }
3014
3015         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3016                        priv->active_rate, priv->active_rate_basic);
3017
3018         /*
3019          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3020          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3021          * OFDM
3022          */
3023         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3024                 priv->staging_rxon.cck_basic_rates =
3025                     ((priv->active_rate_basic &
3026                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3027         else
3028                 priv->staging_rxon.cck_basic_rates =
3029                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3030
3031         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3032                 priv->staging_rxon.ofdm_basic_rates =
3033                     ((priv->active_rate_basic &
3034                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3035                       IWL_FIRST_OFDM_RATE) & 0xFF;
3036         else
3037                 priv->staging_rxon.ofdm_basic_rates =
3038                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3039 }
3040
3041 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
3042 {
3043         unsigned long flags;
3044
3045         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3046                 return;
3047
3048         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3049                           disable_radio ? "OFF" : "ON");
3050
3051         if (disable_radio) {
3052                 iwl3945_scan_cancel(priv);
3053                 /* FIXME: This is a workaround for AP */
3054                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3055                         spin_lock_irqsave(&priv->lock, flags);
3056                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3057                                     CSR_UCODE_SW_BIT_RFKILL);
3058                         spin_unlock_irqrestore(&priv->lock, flags);
3059                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3060                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3061                 }
3062                 return;
3063         }
3064
3065         spin_lock_irqsave(&priv->lock, flags);
3066         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3067
3068         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3069         spin_unlock_irqrestore(&priv->lock, flags);
3070
3071         /* wake up ucode */
3072         msleep(10);
3073
3074         spin_lock_irqsave(&priv->lock, flags);
3075         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3076         if (!iwl3945_grab_nic_access(priv))
3077                 iwl3945_release_nic_access(priv);
3078         spin_unlock_irqrestore(&priv->lock, flags);
3079
3080         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3081                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3082                                   "disabled by HW switch\n");
3083                 return;
3084         }
3085
3086         queue_work(priv->workqueue, &priv->restart);
3087         return;
3088 }
3089
3090 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
3091                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3092 {
3093         u16 fc =
3094             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3095
3096         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3097                 return;
3098
3099         if (!(fc & IEEE80211_FCTL_PROTECTED))
3100                 return;
3101
3102         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3103         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3104         case RX_RES_STATUS_SEC_TYPE_TKIP:
3105                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3106                     RX_RES_STATUS_BAD_ICV_MIC)
3107                         stats->flag |= RX_FLAG_MMIC_ERROR;
3108         case RX_RES_STATUS_SEC_TYPE_WEP:
3109         case RX_RES_STATUS_SEC_TYPE_CCMP:
3110                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3111                     RX_RES_STATUS_DECRYPT_OK) {
3112                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3113                         stats->flag |= RX_FLAG_DECRYPTED;
3114                 }
3115                 break;
3116
3117         default:
3118                 break;
3119         }
3120 }
3121
3122 void iwl3945_handle_data_packet_monitor(struct iwl3945_priv *priv,
3123                                     struct iwl3945_rx_mem_buffer *rxb,
3124                                     void *data, short len,
3125                                     struct ieee80211_rx_status *stats,
3126                                     u16 phy_flags)
3127 {
3128         struct iwl3945_rt_rx_hdr *iwl3945_rt;
3129
3130         /* First cache any information we need before we overwrite
3131          * the information provided in the skb from the hardware */
3132         s8 signal = stats->ssi;
3133         s8 noise = 0;
3134         int rate = stats->rate;
3135         u64 tsf = stats->mactime;
3136         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3137
3138         /* We received data from the HW, so stop the watchdog */
3139         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl3945_rt)) {
3140                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3141                 return;
3142         }
3143
3144         /* copy the frame data to write after where the radiotap header goes */
3145         iwl3945_rt = (void *)rxb->skb->data;
3146         memmove(iwl3945_rt->payload, data, len);
3147
3148         iwl3945_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3149         iwl3945_rt->rt_hdr.it_pad = 0; /* always good to zero */
3150
3151         /* total header + data */
3152         iwl3945_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl3945_rt));
3153
3154         /* Set the size of the skb to the size of the frame */
3155         skb_put(rxb->skb, sizeof(*iwl3945_rt) + len);
3156
3157         /* Big bitfield of all the fields we provide in radiotap */
3158         iwl3945_rt->rt_hdr.it_present =
3159             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3160                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3161                         (1 << IEEE80211_RADIOTAP_RATE) |
3162                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3163                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3164                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3165                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3166
3167         /* Zero the flags, we'll add to them as we go */
3168         iwl3945_rt->rt_flags = 0;
3169
3170         iwl3945_rt->rt_tsf = cpu_to_le64(tsf);
3171
3172         /* Convert to dBm */
3173         iwl3945_rt->rt_dbmsignal = signal;
3174         iwl3945_rt->rt_dbmnoise = noise;
3175
3176         /* Convert the channel frequency and set the flags */
3177         iwl3945_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3178         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3179                 iwl3945_rt->rt_chbitmask =
3180                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3181         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3182                 iwl3945_rt->rt_chbitmask =
3183                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3184         else    /* 802.11g */
3185                 iwl3945_rt->rt_chbitmask =
3186                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3187
3188         rate = iwl3945_rate_index_from_plcp(rate);
3189         if (rate == -1)
3190                 iwl3945_rt->rt_rate = 0;
3191         else
3192                 iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;
3193
3194         /* antenna number */
3195         iwl3945_rt->rt_antenna =
3196                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3197
3198         /* set the preamble flag if we have it */
3199         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3200                 iwl3945_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3201
3202         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3203
3204         stats->flag |= RX_FLAG_RADIOTAP;
3205         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3206         rxb->skb = NULL;
3207 }
3208
3209
3210 #define IWL_PACKET_RETRY_TIME HZ
3211
3212 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
3213 {
3214         u16 sc = le16_to_cpu(header->seq_ctrl);
3215         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3216         u16 frag = sc & IEEE80211_SCTL_FRAG;
3217         u16 *last_seq, *last_frag;
3218         unsigned long *last_time;
3219
3220         switch (priv->iw_mode) {
3221         case IEEE80211_IF_TYPE_IBSS:{
3222                 struct list_head *p;
3223                 struct iwl3945_ibss_seq *entry = NULL;
3224                 u8 *mac = header->addr2;
3225                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3226
3227                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3228                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
3229                         if (!compare_ether_addr(entry->mac, mac))
3230                                 break;
3231                 }
3232                 if (p == &priv->ibss_mac_hash[index]) {
3233                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3234                         if (!entry) {
3235                                 IWL_ERROR("Cannot malloc new mac entry\n");
3236                                 return 0;
3237                         }
3238                         memcpy(entry->mac, mac, ETH_ALEN);
3239                         entry->seq_num = seq;
3240                         entry->frag_num = frag;
3241                         entry->packet_time = jiffies;
3242                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3243                         return 0;
3244                 }
3245                 last_seq = &entry->seq_num;
3246                 last_frag = &entry->frag_num;
3247                 last_time = &entry->packet_time;
3248                 break;
3249         }
3250         case IEEE80211_IF_TYPE_STA:
3251                 last_seq = &priv->last_seq_num;
3252                 last_frag = &priv->last_frag_num;
3253                 last_time = &priv->last_packet_time;
3254                 break;
3255         default:
3256                 return 0;
3257         }
3258         if ((*last_seq == seq) &&
3259             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3260                 if (*last_frag == frag)
3261                         goto drop;
3262                 if (*last_frag + 1 != frag)
3263                         /* out-of-order fragment */
3264                         goto drop;
3265         } else
3266                 *last_seq = seq;
3267
3268         *last_frag = frag;
3269         *last_time = jiffies;
3270         return 0;
3271
3272  drop:
3273         return 1;
3274 }
3275
3276 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3277
3278 #include "iwl-spectrum.h"
3279
3280 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3281 #define BEACON_TIME_MASK_HIGH   0xFF000000
3282 #define TIME_UNIT               1024
3283
3284 /*
3285  * extended beacon time format
3286  * time in usec will be changed into a 32-bit value in 8:24 format
3287  * the high 1 byte is the beacon counts
3288  * the lower 3 bytes is the time in usec within one beacon interval
3289  */
3290
3291 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3292 {
3293         u32 quot;
3294         u32 rem;
3295         u32 interval = beacon_interval * 1024;
3296
3297         if (!interval || !usec)
3298                 return 0;
3299
3300         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3301         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3302
3303         return (quot << 24) + rem;
3304 }
3305
3306 /* base is usually what we get from ucode with each received frame,
3307  * the same as HW timer counter counting down
3308  */
3309
3310 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3311 {
3312         u32 base_low = base & BEACON_TIME_MASK_LOW;
3313         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3314         u32 interval = beacon_interval * TIME_UNIT;
3315         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3316             (addon & BEACON_TIME_MASK_HIGH);
3317
3318         if (base_low > addon_low)
3319                 res += base_low - addon_low;
3320         else if (base_low < addon_low) {
3321                 res += interval + base_low - addon_low;
3322                 res += (1 << 24);
3323         } else
3324                 res += (1 << 24);
3325
3326         return cpu_to_le32(res);
3327 }
3328
3329 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3330                                struct ieee80211_measurement_params *params,
3331                                u8 type)
3332 {
3333         struct iwl3945_spectrum_cmd spectrum;
3334         struct iwl3945_rx_packet *res;
3335         struct iwl3945_host_cmd cmd = {
3336                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3337                 .data = (void *)&spectrum,
3338                 .meta.flags = CMD_WANT_SKB,
3339         };
3340         u32 add_time = le64_to_cpu(params->start_time);
3341         int rc;
3342         int spectrum_resp_status;
3343         int duration = le16_to_cpu(params->duration);
3344
3345         if (iwl3945_is_associated(priv))
3346                 add_time =
3347                     iwl3945_usecs_to_beacons(
3348                         le64_to_cpu(params->start_time) - priv->last_tsf,
3349                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3350
3351         memset(&spectrum, 0, sizeof(spectrum));
3352
3353         spectrum.channel_count = cpu_to_le16(1);
3354         spectrum.flags =
3355             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3356         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3357         cmd.len = sizeof(spectrum);
3358         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3359
3360         if (iwl3945_is_associated(priv))
3361                 spectrum.start_time =
3362                     iwl3945_add_beacon_time(priv->last_beacon_time,
3363                                 add_time,
3364                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3365         else
3366                 spectrum.start_time = 0;
3367
3368         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3369         spectrum.channels[0].channel = params->channel;
3370         spectrum.channels[0].type = type;
3371         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3372                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3373                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3374
3375         rc = iwl3945_send_cmd_sync(priv, &cmd);
3376         if (rc)
3377                 return rc;
3378
3379         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3380         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3381                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3382                 rc = -EIO;
3383         }
3384
3385         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3386         switch (spectrum_resp_status) {
3387         case 0:         /* Command will be handled */
3388                 if (res->u.spectrum.id != 0xff) {
3389                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3390                                                 res->u.spectrum.id);
3391                         priv->measurement_status &= ~MEASUREMENT_READY;
3392                 }
3393                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3394                 rc = 0;
3395                 break;
3396
3397         case 1:         /* Command will not be handled */
3398                 rc = -EAGAIN;
3399                 break;
3400         }
3401
3402         dev_kfree_skb_any(cmd.meta.u.skb);
3403
3404         return rc;
3405 }
3406 #endif
3407
3408 static void iwl3945_txstatus_to_ieee(struct iwl3945_priv *priv,
3409                                  struct iwl3945_tx_info *tx_sta)
3410 {
3411
3412         tx_sta->status.ack_signal = 0;
3413         tx_sta->status.excessive_retries = 0;
3414         tx_sta->status.queue_length = 0;
3415         tx_sta->status.queue_number = 0;
3416
3417         if (in_interrupt())
3418                 ieee80211_tx_status_irqsafe(priv->hw,
3419                                             tx_sta->skb[0], &(tx_sta->status));
3420         else
3421                 ieee80211_tx_status(priv->hw,
3422                                     tx_sta->skb[0], &(tx_sta->status));
3423
3424         tx_sta->skb[0] = NULL;
3425 }
3426
3427 /**
3428  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3429  *
3430  * When FW advances 'R' index, all entries between old and new 'R' index
3431  * need to be reclaimed. As result, some free space forms. If there is
3432  * enough free space (> low mark), wake the stack that feeds us.
3433  */
3434 static int iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv, int txq_id, int index)
3435 {
3436         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3437         struct iwl3945_queue *q = &txq->q;
3438         int nfreed = 0;
3439
3440         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3441                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3442                           "is out of range [0-%d] %d %d.\n", txq_id,
3443                           index, q->n_bd, q->write_ptr, q->read_ptr);
3444                 return 0;
3445         }
3446
3447         for (index = iwl3945_queue_inc_wrap(index, q->n_bd);
3448                 q->read_ptr != index;
3449                 q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3450                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3451                         iwl3945_txstatus_to_ieee(priv,
3452                                         &(txq->txb[txq->q.read_ptr]));
3453                         iwl3945_hw_txq_free_tfd(priv, txq);
3454                 } else if (nfreed > 1) {
3455                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3456                                         q->write_ptr, q->read_ptr);
3457                         queue_work(priv->workqueue, &priv->restart);
3458                 }
3459                 nfreed++;
3460         }
3461
3462         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3463                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3464                         priv->mac80211_registered)
3465                 ieee80211_wake_queue(priv->hw, txq_id);
3466
3467
3468         return nfreed;
3469 }
3470
3471 static int iwl3945_is_tx_success(u32 status)
3472 {
3473         return (status & 0xFF) == 0x1;
3474 }
3475
3476 /******************************************************************************
3477  *
3478  * Generic RX handler implementations
3479  *
3480  ******************************************************************************/
3481 /**
3482  * iwl3945_rx_reply_tx - Handle Tx response
3483  */
3484 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
3485                             struct iwl3945_rx_mem_buffer *rxb)
3486 {
3487         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3488         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3489         int txq_id = SEQ_TO_QUEUE(sequence);
3490         int index = SEQ_TO_INDEX(sequence);
3491         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3492         struct ieee80211_tx_status *tx_status;
3493         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3494         u32  status = le32_to_cpu(tx_resp->status);
3495
3496         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3497                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3498                           "is out of range [0-%d] %d %d\n", txq_id,
3499                           index, txq->q.n_bd, txq->q.write_ptr,
3500                           txq->q.read_ptr);
3501                 return;
3502         }
3503
3504         tx_status = &(txq->txb[txq->q.read_ptr].status);
3505
3506         tx_status->retry_count = tx_resp->failure_frame;
3507         tx_status->queue_number = status;
3508         tx_status->queue_length = tx_resp->bt_kill_count;
3509         tx_status->queue_length |= tx_resp->failure_rts;
3510
3511         tx_status->flags =
3512             iwl3945_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3513
3514         tx_status->control.tx_rate = iwl3945_rate_index_from_plcp(tx_resp->rate);
3515
3516         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3517                         txq_id, iwl3945_get_tx_fail_reason(status), status,
3518                         tx_resp->rate, tx_resp->failure_frame);
3519
3520         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3521         if (index != -1)
3522                 iwl3945_tx_queue_reclaim(priv, txq_id, index);
3523
3524         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3525                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3526 }
3527
3528
3529 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3530                                struct iwl3945_rx_mem_buffer *rxb)
3531 {
3532         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3533         struct iwl3945_alive_resp *palive;
3534         struct delayed_work *pwork;
3535
3536         palive = &pkt->u.alive_frame;
3537
3538         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3539                        "0x%01X 0x%01X\n",
3540                        palive->is_valid, palive->ver_type,
3541                        palive->ver_subtype);
3542
3543         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3544                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3545                 memcpy(&priv->card_alive_init,
3546                        &pkt->u.alive_frame,
3547                        sizeof(struct iwl3945_init_alive_resp));
3548                 pwork = &priv->init_alive_start;
3549         } else {
3550                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3551                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3552                        sizeof(struct iwl3945_alive_resp));
3553                 pwork = &priv->alive_start;
3554                 iwl3945_disable_events(priv);
3555         }
3556
3557         /* We delay the ALIVE response by 5ms to
3558          * give the HW RF Kill time to activate... */
3559         if (palive->is_valid == UCODE_VALID_OK)
3560                 queue_delayed_work(priv->workqueue, pwork,
3561                                    msecs_to_jiffies(5));
3562         else
3563                 IWL_WARNING("uCode did not respond OK.\n");
3564 }
3565
3566 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3567                                  struct iwl3945_rx_mem_buffer *rxb)
3568 {
3569         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3570
3571         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3572         return;
3573 }
3574
3575 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3576                                struct iwl3945_rx_mem_buffer *rxb)
3577 {
3578         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3579
3580         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3581                 "seq 0x%04X ser 0x%08X\n",
3582                 le32_to_cpu(pkt->u.err_resp.error_type),
3583                 get_cmd_string(pkt->u.err_resp.cmd_id),
3584                 pkt->u.err_resp.cmd_id,
3585                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3586                 le32_to_cpu(pkt->u.err_resp.error_info));
3587 }
3588
3589 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3590
3591 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3592 {
3593         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3594         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3595         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3596         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3597                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3598         rxon->channel = csa->channel;
3599         priv->staging_rxon.channel = csa->channel;
3600 }
3601
3602 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3603                                           struct iwl3945_rx_mem_buffer *rxb)
3604 {
3605 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3606         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3607         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3608
3609         if (!report->state) {
3610                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3611                           "Spectrum Measure Notification: Start\n");
3612                 return;
3613         }
3614
3615         memcpy(&priv->measure_report, report, sizeof(*report));
3616         priv->measurement_status |= MEASUREMENT_READY;
3617 #endif
3618 }
3619
3620 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3621                                   struct iwl3945_rx_mem_buffer *rxb)
3622 {
3623 #ifdef CONFIG_IWL3945_DEBUG
3624         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3625         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3626         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3627                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3628 #endif
3629 }
3630
3631 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3632                                              struct iwl3945_rx_mem_buffer *rxb)
3633 {
3634         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3635         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3636                         "notification for %s:\n",
3637                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3638         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3639 }
3640
3641 static void iwl3945_bg_beacon_update(struct work_struct *work)
3642 {
3643         struct iwl3945_priv *priv =
3644                 container_of(work, struct iwl3945_priv, beacon_update);
3645         struct sk_buff *beacon;
3646
3647         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3648         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3649
3650         if (!beacon) {
3651                 IWL_ERROR("update beacon failed\n");
3652                 return;
3653         }
3654
3655         mutex_lock(&priv->mutex);
3656         /* new beacon skb is allocated every time; dispose previous.*/
3657         if (priv->ibss_beacon)
3658                 dev_kfree_skb(priv->ibss_beacon);
3659
3660         priv->ibss_beacon = beacon;
3661         mutex_unlock(&priv->mutex);
3662
3663         iwl3945_send_beacon_cmd(priv);
3664 }
3665
3666 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3667                                 struct iwl3945_rx_mem_buffer *rxb)
3668 {
3669 #ifdef CONFIG_IWL3945_DEBUG
3670         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3671         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3672         u8 rate = beacon->beacon_notify_hdr.rate;
3673
3674         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3675                 "tsf %d %d rate %d\n",
3676                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3677                 beacon->beacon_notify_hdr.failure_frame,
3678                 le32_to_cpu(beacon->ibss_mgr_status),
3679                 le32_to_cpu(beacon->high_tsf),
3680                 le32_to_cpu(beacon->low_tsf), rate);
3681 #endif
3682
3683         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3684             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3685                 queue_work(priv->workqueue, &priv->beacon_update);
3686 }
3687
3688 /* Service response to REPLY_SCAN_CMD (0x80) */
3689 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3690                               struct iwl3945_rx_mem_buffer *rxb)
3691 {
3692 #ifdef CONFIG_IWL3945_DEBUG
3693         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3694         struct iwl3945_scanreq_notification *notif =
3695             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3696
3697         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3698 #endif
3699 }
3700
3701 /* Service SCAN_START_NOTIFICATION (0x82) */
3702 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3703                                     struct iwl3945_rx_mem_buffer *rxb)
3704 {
3705         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3706         struct iwl3945_scanstart_notification *notif =
3707             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3708         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3709         IWL_DEBUG_SCAN("Scan start: "
3710                        "%d [802.11%s] "
3711                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3712                        notif->channel,
3713                        notif->band ? "bg" : "a",
3714                        notif->tsf_high,
3715                        notif->tsf_low, notif->status, notif->beacon_timer);
3716 }
3717
3718 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3719 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3720                                       struct iwl3945_rx_mem_buffer *rxb)
3721 {
3722         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3723         struct iwl3945_scanresults_notification *notif =
3724             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3725
3726         IWL_DEBUG_SCAN("Scan ch.res: "
3727                        "%d [802.11%s] "
3728                        "(TSF: 0x%08X:%08X) - %d "
3729                        "elapsed=%lu usec (%dms since last)\n",
3730                        notif->channel,
3731                        notif->band ? "bg" : "a",
3732                        le32_to_cpu(notif->tsf_high),
3733                        le32_to_cpu(notif->tsf_low),
3734                        le32_to_cpu(notif->statistics[0]),
3735                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3736                        jiffies_to_msecs(elapsed_jiffies
3737                                         (priv->last_scan_jiffies, jiffies)));
3738
3739         priv->last_scan_jiffies = jiffies;
3740 }
3741
3742 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3743 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3744                                        struct iwl3945_rx_mem_buffer *rxb)
3745 {
3746         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3747         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3748
3749         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3750                        scan_notif->scanned_channels,
3751                        scan_notif->tsf_low,
3752                        scan_notif->tsf_high, scan_notif->status);
3753
3754         /* The HW is no longer scanning */
3755         clear_bit(STATUS_SCAN_HW, &priv->status);
3756
3757         /* The scan completion notification came in, so kill that timer... */
3758         cancel_delayed_work(&priv->scan_check);
3759
3760         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3761                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3762                        jiffies_to_msecs(elapsed_jiffies
3763                                         (priv->scan_pass_start, jiffies)));
3764
3765         /* Remove this scanned band from the list
3766          * of pending bands to scan */
3767         priv->scan_bands--;
3768
3769         /* If a request to abort was given, or the scan did not succeed
3770          * then we reset the scan state machine and terminate,
3771          * re-queuing another scan if one has been requested */
3772         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3773                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3774                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3775         } else {
3776                 /* If there are more bands on this scan pass reschedule */
3777                 if (priv->scan_bands > 0)
3778                         goto reschedule;
3779         }
3780
3781         priv->last_scan_jiffies = jiffies;
3782         IWL_DEBUG_INFO("Setting scan to off\n");
3783
3784         clear_bit(STATUS_SCANNING, &priv->status);
3785
3786         IWL_DEBUG_INFO("Scan took %dms\n",
3787                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3788
3789         queue_work(priv->workqueue, &priv->scan_completed);
3790
3791         return;
3792
3793 reschedule:
3794         priv->scan_pass_start = jiffies;
3795         queue_work(priv->workqueue, &priv->request_scan);
3796 }
3797
3798 /* Handle notification from uCode that card's power state is changing
3799  * due to software, hardware, or critical temperature RFKILL */
3800 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3801                                     struct iwl3945_rx_mem_buffer *rxb)
3802 {
3803         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3804         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3805         unsigned long status = priv->status;
3806
3807         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3808                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3809                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3810
3811         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3812                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3813
3814         if (flags & HW_CARD_DISABLED)
3815                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3816         else
3817                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3818
3819
3820         if (flags & SW_CARD_DISABLED)
3821                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3822         else
3823                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3824
3825         iwl3945_scan_cancel(priv);
3826
3827         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3828              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3829             (test_bit(STATUS_RF_KILL_SW, &status) !=
3830              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3831                 queue_work(priv->workqueue, &priv->rf_kill);
3832         else
3833                 wake_up_interruptible(&priv->wait_command_queue);
3834 }
3835
3836 /**
3837  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3838  *
3839  * Setup the RX handlers for each of the reply types sent from the uCode
3840  * to the host.
3841  *
3842  * This function chains into the hardware specific files for them to setup
3843  * any hardware specific handlers as well.
3844  */
3845 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3846 {
3847         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3848         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3849         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3850         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3851         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3852             iwl3945_rx_spectrum_measure_notif;
3853         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3854         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3855             iwl3945_rx_pm_debug_statistics_notif;
3856         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3857
3858         /*
3859          * The same handler is used for both the REPLY to a discrete
3860          * statistics request from the host as well as for the periodic
3861          * statistics notifications (after received beacons) from the uCode.
3862          */
3863         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3864         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3865
3866         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3867         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3868         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3869             iwl3945_rx_scan_results_notif;
3870         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3871             iwl3945_rx_scan_complete_notif;
3872         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3873         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
3874
3875         /* Set up hardware specific Rx handlers */
3876         iwl3945_hw_rx_handler_setup(priv);
3877 }
3878
3879 /**
3880  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3881  * @rxb: Rx buffer to reclaim
3882  *
3883  * If an Rx buffer has an async callback associated with it the callback
3884  * will be executed.  The attached skb (if present) will only be freed
3885  * if the callback returns 1
3886  */
3887 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3888                                 struct iwl3945_rx_mem_buffer *rxb)
3889 {
3890         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3891         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3892         int txq_id = SEQ_TO_QUEUE(sequence);
3893         int index = SEQ_TO_INDEX(sequence);
3894         int huge = sequence & SEQ_HUGE_FRAME;
3895         int cmd_index;
3896         struct iwl3945_cmd *cmd;
3897
3898         /* If a Tx command is being handled and it isn't in the actual
3899          * command queue then there a command routing bug has been introduced
3900          * in the queue management code. */
3901         if (txq_id != IWL_CMD_QUEUE_NUM)
3902                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3903                           txq_id, pkt->hdr.cmd);
3904         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3905
3906         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3907         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3908
3909         /* Input error checking is done when commands are added to queue. */
3910         if (cmd->meta.flags & CMD_WANT_SKB) {
3911                 cmd->meta.source->u.skb = rxb->skb;
3912                 rxb->skb = NULL;
3913         } else if (cmd->meta.u.callback &&
3914                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3915                 rxb->skb = NULL;
3916
3917         iwl3945_tx_queue_reclaim(priv, txq_id, index);
3918
3919         if (!(cmd->meta.flags & CMD_ASYNC)) {
3920                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3921                 wake_up_interruptible(&priv->wait_command_queue);
3922         }
3923 }
3924
3925 /************************** RX-FUNCTIONS ****************************/
3926 /*
3927  * Rx theory of operation
3928  *
3929  * The host allocates 32 DMA target addresses and passes the host address
3930  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3931  * 0 to 31
3932  *
3933  * Rx Queue Indexes
3934  * The host/firmware share two index registers for managing the Rx buffers.
3935  *
3936  * The READ index maps to the first position that the firmware may be writing
3937  * to -- the driver can read up to (but not including) this position and get
3938  * good data.
3939  * The READ index is managed by the firmware once the card is enabled.
3940  *
3941  * The WRITE index maps to the last position the driver has read from -- the
3942  * position preceding WRITE is the last slot the firmware can place a packet.
3943  *
3944  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3945  * WRITE = READ.
3946  *
3947  * During initialization, the host sets up the READ queue position to the first
3948  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3949  *
3950  * When the firmware places a packet in a buffer, it will advance the READ index
3951  * and fire the RX interrupt.  The driver can then query the READ index and
3952  * process as many packets as possible, moving the WRITE index forward as it
3953  * resets the Rx queue buffers with new memory.
3954  *
3955  * The management in the driver is as follows:
3956  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3957  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3958  *   to replenish the iwl->rxq->rx_free.
3959  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3960  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3961  *   'processed' and 'read' driver indexes as well)
3962  * + A received packet is processed and handed to the kernel network stack,
3963  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3964  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3965  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3966  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3967  *   were enough free buffers and RX_STALLED is set it is cleared.
3968  *
3969  *
3970  * Driver sequence:
3971  *
3972  * iwl3945_rx_queue_alloc()   Allocates rx_free
3973  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3974  *                            iwl3945_rx_queue_restock
3975  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3976  *                            queue, updates firmware pointers, and updates
3977  *                            the WRITE index.  If insufficient rx_free buffers
3978  *                            are available, schedules iwl3945_rx_replenish
3979  *
3980  * -- enable interrupts --
3981  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3982  *                            READ INDEX, detaching the SKB from the pool.
3983  *                            Moves the packet buffer from queue to rx_used.
3984  *                            Calls iwl3945_rx_queue_restock to refill any empty
3985  *                            slots.
3986  * ...
3987  *
3988  */
3989
3990 /**
3991  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3992  */
3993 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3994 {
3995         int s = q->read - q->write;
3996         if (s <= 0)
3997                 s += RX_QUEUE_SIZE;
3998         /* keep some buffer to not confuse full and empty queue */
3999         s -= 2;
4000         if (s < 0)
4001                 s = 0;
4002         return s;
4003 }
4004
4005 /**
4006  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4007  */
4008 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
4009 {
4010         u32 reg = 0;
4011         int rc = 0;
4012         unsigned long flags;
4013
4014         spin_lock_irqsave(&q->lock, flags);
4015
4016         if (q->need_update == 0)
4017                 goto exit_unlock;
4018
4019         /* If power-saving is in use, make sure device is awake */
4020         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4021                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4022
4023                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4024                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4025                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4026                         goto exit_unlock;
4027                 }
4028
4029                 rc = iwl3945_grab_nic_access(priv);
4030                 if (rc)
4031                         goto exit_unlock;
4032
4033                 /* Device expects a multiple of 8 */
4034                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4035                                      q->write & ~0x7);
4036                 iwl3945_release_nic_access(priv);
4037
4038         /* Else device is assumed to be awake */
4039         } else
4040                 /* Device expects a multiple of 8 */
4041                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4042
4043
4044         q->need_update = 0;
4045
4046  exit_unlock:
4047         spin_unlock_irqrestore(&q->lock, flags);
4048         return rc;
4049 }
4050
4051 /**
4052  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4053  */
4054 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
4055                                           dma_addr_t dma_addr)
4056 {
4057         return cpu_to_le32((u32)dma_addr);
4058 }
4059
4060 /**
4061  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
4062  *
4063  * If there are slots in the RX queue that need to be restocked,
4064  * and we have free pre-allocated buffers, fill the ranks as much
4065  * as we can, pulling from rx_free.
4066  *
4067  * This moves the 'write' index forward to catch up with 'processed', and
4068  * also updates the memory address in the firmware to reference the new
4069  * target buffer.
4070  */
4071 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
4072 {
4073         struct iwl3945_rx_queue *rxq = &priv->rxq;
4074         struct list_head *element;
4075         struct iwl3945_rx_mem_buffer *rxb;
4076         unsigned long flags;
4077         int write, rc;
4078
4079         spin_lock_irqsave(&rxq->lock, flags);
4080         write = rxq->write & ~0x7;
4081         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4082                 /* Get next free Rx buffer, remove from free list */
4083                 element = rxq->rx_free.next;
4084                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4085                 list_del(element);
4086
4087                 /* Point to Rx buffer via next RBD in circular buffer */
4088                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4089                 rxq->queue[rxq->write] = rxb;
4090                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4091                 rxq->free_count--;
4092         }
4093         spin_unlock_irqrestore(&rxq->lock, flags);
4094         /* If the pre-allocated buffer pool is dropping low, schedule to
4095          * refill it */
4096         if (rxq->free_count <= RX_LOW_WATERMARK)
4097                 queue_work(priv->workqueue, &priv->rx_replenish);
4098
4099
4100         /* If we've added more space for the firmware to place data, tell it.
4101          * Increment device's write pointer in multiples of 8. */
4102         if ((write != (rxq->write & ~0x7))
4103             || (abs(rxq->write - rxq->read) > 7)) {
4104                 spin_lock_irqsave(&rxq->lock, flags);
4105                 rxq->need_update = 1;
4106                 spin_unlock_irqrestore(&rxq->lock, flags);
4107                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
4108                 if (rc)
4109                         return rc;
4110         }
4111
4112         return 0;
4113 }
4114
4115 /**
4116  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
4117  *
4118  * When moving to rx_free an SKB is allocated for the slot.
4119  *
4120  * Also restock the Rx queue via iwl3945_rx_queue_restock.
4121  * This is called as a scheduled work item (except for during initialization)
4122  */
4123 void iwl3945_rx_replenish(void *data)
4124 {
4125         struct iwl3945_priv *priv = data;
4126         struct iwl3945_rx_queue *rxq = &priv->rxq;
4127         struct list_head *element;
4128         struct iwl3945_rx_mem_buffer *rxb;
4129         unsigned long flags;
4130         spin_lock_irqsave(&rxq->lock, flags);
4131         while (!list_empty(&rxq->rx_used)) {
4132                 element = rxq->rx_used.next;
4133                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4134
4135                 /* Alloc a new receive buffer */
4136                 rxb->skb =
4137                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4138                 if (!rxb->skb) {
4139                         if (net_ratelimit())
4140                                 printk(KERN_CRIT DRV_NAME
4141                                        ": Can not allocate SKB buffers\n");
4142                         /* We don't reschedule replenish work here -- we will
4143                          * call the restock method and if it still needs
4144                          * more buffers it will schedule replenish */
4145                         break;
4146                 }
4147                 priv->alloc_rxb_skb++;
4148                 list_del(element);
4149
4150                 /* Get physical address of RB/SKB */
4151                 rxb->dma_addr =
4152                     pci_map_single(priv->pci_dev, rxb->skb->data,
4153                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4154                 list_add_tail(&rxb->list, &rxq->rx_free);
4155                 rxq->free_count++;
4156         }
4157         spin_unlock_irqrestore(&rxq->lock, flags);
4158
4159         spin_lock_irqsave(&priv->lock, flags);
4160         iwl3945_rx_queue_restock(priv);
4161         spin_unlock_irqrestore(&priv->lock, flags);
4162 }
4163
4164 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4165  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4166  * This free routine walks the list of POOL entries and if SKB is set to
4167  * non NULL it is unmapped and freed
4168  */
4169 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4170 {
4171         int i;
4172         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4173                 if (rxq->pool[i].skb != NULL) {
4174                         pci_unmap_single(priv->pci_dev,
4175                                          rxq->pool[i].dma_addr,
4176                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4177                         dev_kfree_skb(rxq->pool[i].skb);
4178                 }
4179         }
4180
4181         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4182                             rxq->dma_addr);
4183         rxq->bd = NULL;
4184 }
4185
4186 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
4187 {
4188         struct iwl3945_rx_queue *rxq = &priv->rxq;
4189         struct pci_dev *dev = priv->pci_dev;
4190         int i;
4191
4192         spin_lock_init(&rxq->lock);
4193         INIT_LIST_HEAD(&rxq->rx_free);
4194         INIT_LIST_HEAD(&rxq->rx_used);
4195
4196         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4197         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4198         if (!rxq->bd)
4199                 return -ENOMEM;
4200
4201         /* Fill the rx_used queue with _all_ of the Rx buffers */
4202         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4203                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4204
4205         /* Set us so that we have processed and used all buffers, but have
4206          * not restocked the Rx queue with fresh buffers */
4207         rxq->read = rxq->write = 0;
4208         rxq->free_count = 0;
4209         rxq->need_update = 0;
4210         return 0;
4211 }
4212
4213 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4214 {
4215         unsigned long flags;
4216         int i;
4217         spin_lock_irqsave(&rxq->lock, flags);
4218         INIT_LIST_HEAD(&rxq->rx_free);
4219         INIT_LIST_HEAD(&rxq->rx_used);
4220         /* Fill the rx_used queue with _all_ of the Rx buffers */
4221         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4222                 /* In the reset function, these buffers may have been allocated
4223                  * to an SKB, so we need to unmap and free potential storage */
4224                 if (rxq->pool[i].skb != NULL) {
4225                         pci_unmap_single(priv->pci_dev,
4226                                          rxq->pool[i].dma_addr,
4227                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4228                         priv->alloc_rxb_skb--;
4229                         dev_kfree_skb(rxq->pool[i].skb);
4230                         rxq->pool[i].skb = NULL;
4231                 }
4232                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4233         }
4234
4235         /* Set us so that we have processed and used all buffers, but have
4236          * not restocked the Rx queue with fresh buffers */
4237         rxq->read = rxq->write = 0;
4238         rxq->free_count = 0;
4239         spin_unlock_irqrestore(&rxq->lock, flags);
4240 }
4241
4242 /* Convert linear signal-to-noise ratio into dB */
4243 static u8 ratio2dB[100] = {
4244 /*       0   1   2   3   4   5   6   7   8   9 */
4245          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4246         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4247         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4248         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4249         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4250         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4251         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4252         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4253         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4254         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4255 };
4256
4257 /* Calculates a relative dB value from a ratio of linear
4258  *   (i.e. not dB) signal levels.
4259  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4260 int iwl3945_calc_db_from_ratio(int sig_ratio)
4261 {
4262         /* Anything above 1000:1 just report as 60 dB */
4263         if (sig_ratio > 1000)
4264                 return 60;
4265
4266         /* Above 100:1, divide by 10 and use table,
4267          *   add 20 dB to make up for divide by 10 */
4268         if (sig_ratio > 100)
4269                 return (20 + (int)ratio2dB[sig_ratio/10]);
4270
4271         /* We shouldn't see this */
4272         if (sig_ratio < 1)
4273                 return 0;
4274
4275         /* Use table for ratios 1:1 - 99:1 */
4276         return (int)ratio2dB[sig_ratio];
4277 }
4278
4279 #define PERFECT_RSSI (-20) /* dBm */
4280 #define WORST_RSSI (-95)   /* dBm */
4281 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4282
4283 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4284  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4285  *   about formulas used below. */
4286 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
4287 {
4288         int sig_qual;
4289         int degradation = PERFECT_RSSI - rssi_dbm;
4290
4291         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4292          * as indicator; formula is (signal dbm - noise dbm).
4293          * SNR at or above 40 is a great signal (100%).
4294          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4295          * Weakest usable signal is usually 10 - 15 dB SNR. */
4296         if (noise_dbm) {
4297                 if (rssi_dbm - noise_dbm >= 40)
4298                         return 100;
4299                 else if (rssi_dbm < noise_dbm)
4300                         return 0;
4301                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4302
4303         /* Else use just the signal level.
4304          * This formula is a least squares fit of data points collected and
4305          *   compared with a reference system that had a percentage (%) display
4306          *   for signal quality. */
4307         } else
4308                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4309                             (15 * RSSI_RANGE + 62 * degradation)) /
4310                            (RSSI_RANGE * RSSI_RANGE);
4311
4312         if (sig_qual > 100)
4313                 sig_qual = 100;
4314         else if (sig_qual < 1)
4315                 sig_qual = 0;
4316
4317         return sig_qual;
4318 }
4319
4320 /**
4321  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
4322  *
4323  * Uses the priv->rx_handlers callback function array to invoke
4324  * the appropriate handlers, including command responses,
4325  * frame-received notifications, and other notifications.
4326  */
4327 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
4328 {
4329         struct iwl3945_rx_mem_buffer *rxb;
4330         struct iwl3945_rx_packet *pkt;
4331         struct iwl3945_rx_queue *rxq = &priv->rxq;
4332         u32 r, i;
4333         int reclaim;
4334         unsigned long flags;
4335
4336         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4337          * buffer that the driver may process (last buffer filled by ucode). */
4338         r = iwl3945_hw_get_rx_read(priv);
4339         i = rxq->read;
4340
4341         /* Rx interrupt, but nothing sent from uCode */
4342         if (i == r)
4343                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4344
4345         while (i != r) {
4346                 rxb = rxq->queue[i];
4347
4348                 /* If an RXB doesn't have a Rx queue slot associated with it,
4349                  * then a bug has been introduced in the queue refilling
4350                  * routines -- catch it here */
4351                 BUG_ON(rxb == NULL);
4352
4353                 rxq->queue[i] = NULL;
4354
4355                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4356                                             IWL_RX_BUF_SIZE,
4357                                             PCI_DMA_FROMDEVICE);
4358                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4359
4360                 /* Reclaim a command buffer only if this packet is a response
4361                  *   to a (driver-originated) command.
4362                  * If the packet (e.g. Rx frame) originated from uCode,
4363                  *   there is no command buffer to reclaim.
4364                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4365                  *   but apparently a few don't get set; catch them here. */
4366                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4367                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4368                         (pkt->hdr.cmd != REPLY_TX);
4369
4370                 /* Based on type of command response or notification,
4371                  *   handle those that need handling via function in
4372                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4373                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4374                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4375                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4376                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4377                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4378                 } else {
4379                         /* No handling needed */
4380                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4381                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4382                                 r, i, get_cmd_string(pkt->hdr.cmd),
4383                                 pkt->hdr.cmd);
4384                 }
4385
4386                 if (reclaim) {
4387                         /* Invoke any callbacks, transfer the skb to caller, and
4388                          * fire off the (possibly) blocking iwl3945_send_cmd()
4389                          * as we reclaim the driver command queue */
4390                         if (rxb && rxb->skb)
4391                                 iwl3945_tx_cmd_complete(priv, rxb);
4392                         else
4393                                 IWL_WARNING("Claim null rxb?\n");
4394                 }
4395
4396                 /* For now we just don't re-use anything.  We can tweak this
4397                  * later to try and re-use notification packets and SKBs that
4398                  * fail to Rx correctly */
4399                 if (rxb->skb != NULL) {
4400                         priv->alloc_rxb_skb--;
4401                         dev_kfree_skb_any(rxb->skb);
4402                         rxb->skb = NULL;
4403                 }
4404
4405                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4406                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4407                 spin_lock_irqsave(&rxq->lock, flags);
4408                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4409                 spin_unlock_irqrestore(&rxq->lock, flags);
4410                 i = (i + 1) & RX_QUEUE_MASK;
4411         }
4412
4413         /* Backtrack one entry */
4414         priv->rxq.read = i;
4415         iwl3945_rx_queue_restock(priv);
4416 }
4417
4418 /**
4419  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4420  */
4421 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4422                                   struct iwl3945_tx_queue *txq)
4423 {
4424         u32 reg = 0;
4425         int rc = 0;
4426         int txq_id = txq->q.id;
4427
4428         if (txq->need_update == 0)
4429                 return rc;
4430
4431         /* if we're trying to save power */
4432         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4433                 /* wake up nic if it's powered down ...
4434                  * uCode will wake up, and interrupt us again, so next
4435                  * time we'll skip this part. */
4436                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4437
4438                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4439                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4440                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4441                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4442                         return rc;
4443                 }
4444
4445                 /* restore this queue's parameters in nic hardware. */
4446                 rc = iwl3945_grab_nic_access(priv);
4447                 if (rc)
4448                         return rc;
4449                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4450                                      txq->q.write_ptr | (txq_id << 8));
4451                 iwl3945_release_nic_access(priv);
4452
4453         /* else not in power-save mode, uCode will never sleep when we're
4454          * trying to tx (during RFKILL, we're not trying to tx). */
4455         } else
4456                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4457                             txq->q.write_ptr | (txq_id << 8));
4458
4459         txq->need_update = 0;
4460
4461         return rc;
4462 }
4463
4464 #ifdef CONFIG_IWL3945_DEBUG
4465 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4466 {
4467         DECLARE_MAC_BUF(mac);
4468
4469         IWL_DEBUG_RADIO("RX CONFIG:\n");
4470         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4471         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4472         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4473         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4474                         le32_to_cpu(rxon->filter_flags));
4475         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4476         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4477                         rxon->ofdm_basic_rates);
4478         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4479         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4480                         print_mac(mac, rxon->node_addr));
4481         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4482                         print_mac(mac, rxon->bssid_addr));
4483         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4484 }
4485 #endif
4486
4487 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4488 {
4489         IWL_DEBUG_ISR("Enabling interrupts\n");
4490         set_bit(STATUS_INT_ENABLED, &priv->status);
4491         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4492 }
4493
4494 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4495 {
4496         clear_bit(STATUS_INT_ENABLED, &priv->status);
4497
4498         /* disable interrupts from uCode/NIC to host */
4499         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4500
4501         /* acknowledge/clear/reset any interrupts still pending
4502          * from uCode or flow handler (Rx/Tx DMA) */
4503         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4504         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4505         IWL_DEBUG_ISR("Disabled interrupts\n");
4506 }
4507
4508 static const char *desc_lookup(int i)
4509 {
4510         switch (i) {
4511         case 1:
4512                 return "FAIL";
4513         case 2:
4514                 return "BAD_PARAM";
4515         case 3:
4516                 return "BAD_CHECKSUM";
4517         case 4:
4518                 return "NMI_INTERRUPT";
4519         case 5:
4520                 return "SYSASSERT";
4521         case 6:
4522                 return "FATAL_ERROR";
4523         }
4524
4525         return "UNKNOWN";
4526 }
4527
4528 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4529 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4530
4531 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4532 {
4533         u32 i;
4534         u32 desc, time, count, base, data1;
4535         u32 blink1, blink2, ilink1, ilink2;
4536         int rc;
4537
4538         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4539
4540         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4541                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4542                 return;
4543         }
4544
4545         rc = iwl3945_grab_nic_access(priv);
4546         if (rc) {
4547                 IWL_WARNING("Can not read from adapter at this time.\n");
4548                 return;
4549         }
4550
4551         count = iwl3945_read_targ_mem(priv, base);
4552
4553         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4554                 IWL_ERROR("Start IWL Error Log Dump:\n");
4555                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4556                           priv->status, priv->config, count);
4557         }
4558
4559         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4560                   "ilink1  nmiPC   Line\n");
4561         for (i = ERROR_START_OFFSET;
4562              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4563              i += ERROR_ELEM_SIZE) {
4564                 desc = iwl3945_read_targ_mem(priv, base + i);
4565                 time =
4566                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4567                 blink1 =
4568                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4569                 blink2 =
4570                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4571                 ilink1 =
4572                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4573                 ilink2 =
4574                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4575                 data1 =
4576                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4577
4578                 IWL_ERROR
4579                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4580                      desc_lookup(desc), desc, time, blink1, blink2,
4581                      ilink1, ilink2, data1);
4582         }
4583
4584         iwl3945_release_nic_access(priv);
4585
4586 }
4587
4588 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4589
4590 /**
4591  * iwl3945_print_event_log - Dump error event log to syslog
4592  *
4593  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4594  */
4595 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4596                                 u32 num_events, u32 mode)
4597 {
4598         u32 i;
4599         u32 base;       /* SRAM byte address of event log header */
4600         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4601         u32 ptr;        /* SRAM byte address of log data */
4602         u32 ev, time, data; /* event log data */
4603
4604         if (num_events == 0)
4605                 return;
4606
4607         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4608
4609         if (mode == 0)
4610                 event_size = 2 * sizeof(u32);
4611         else
4612                 event_size = 3 * sizeof(u32);
4613
4614         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4615
4616         /* "time" is actually "data" for mode 0 (no timestamp).
4617          * place event id # at far right for easier visual parsing. */
4618         for (i = 0; i < num_events; i++) {
4619                 ev = iwl3945_read_targ_mem(priv, ptr);
4620                 ptr += sizeof(u32);
4621                 time = iwl3945_read_targ_mem(priv, ptr);
4622                 ptr += sizeof(u32);
4623                 if (mode == 0)
4624                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4625                 else {
4626                         data = iwl3945_read_targ_mem(priv, ptr);
4627                         ptr += sizeof(u32);
4628                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4629                 }
4630         }
4631 }
4632
4633 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4634 {
4635         int rc;
4636         u32 base;       /* SRAM byte address of event log header */
4637         u32 capacity;   /* event log capacity in # entries */
4638         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4639         u32 num_wraps;  /* # times uCode wrapped to top of log */
4640         u32 next_entry; /* index of next entry to be written by uCode */
4641         u32 size;       /* # entries that we'll print */
4642
4643         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4644         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4645                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4646                 return;
4647         }
4648
4649         rc = iwl3945_grab_nic_access(priv);
4650         if (rc) {
4651                 IWL_WARNING("Can not read from adapter at this time.\n");
4652                 return;
4653         }
4654
4655         /* event log header */
4656         capacity = iwl3945_read_targ_mem(priv, base);
4657         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4658         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4659         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4660
4661         size = num_wraps ? capacity : next_entry;
4662
4663         /* bail out if nothing in log */
4664         if (size == 0) {
4665                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4666                 iwl3945_release_nic_access(priv);
4667                 return;
4668         }
4669
4670         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4671                   size, num_wraps);
4672
4673         /* if uCode has wrapped back to top of log, start at the oldest entry,
4674          * i.e the next one that uCode would fill. */
4675         if (num_wraps)
4676                 iwl3945_print_event_log(priv, next_entry,
4677                                     capacity - next_entry, mode);
4678
4679         /* (then/else) start at top of log */
4680         iwl3945_print_event_log(priv, 0, next_entry, mode);
4681
4682         iwl3945_release_nic_access(priv);
4683 }
4684
4685 /**
4686  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4687  */
4688 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4689 {
4690         /* Set the FW error flag -- cleared on iwl3945_down */
4691         set_bit(STATUS_FW_ERROR, &priv->status);
4692
4693         /* Cancel currently queued command. */
4694         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4695
4696 #ifdef CONFIG_IWL3945_DEBUG
4697         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4698                 iwl3945_dump_nic_error_log(priv);
4699                 iwl3945_dump_nic_event_log(priv);
4700                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4701         }
4702 #endif
4703
4704         wake_up_interruptible(&priv->wait_command_queue);
4705
4706         /* Keep the restart process from trying to send host
4707          * commands by clearing the INIT status bit */
4708         clear_bit(STATUS_READY, &priv->status);
4709
4710         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4711                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4712                           "Restarting adapter due to uCode error.\n");
4713
4714                 if (iwl3945_is_associated(priv)) {
4715                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4716                                sizeof(priv->recovery_rxon));
4717                         priv->error_recovering = 1;
4718                 }
4719                 queue_work(priv->workqueue, &priv->restart);
4720         }
4721 }
4722
4723 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4724 {
4725         unsigned long flags;
4726
4727         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4728                sizeof(priv->staging_rxon));
4729         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4730         iwl3945_commit_rxon(priv);
4731
4732         iwl3945_add_station(priv, priv->bssid, 1, 0);
4733
4734         spin_lock_irqsave(&priv->lock, flags);
4735         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4736         priv->error_recovering = 0;
4737         spin_unlock_irqrestore(&priv->lock, flags);
4738 }
4739
4740 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4741 {
4742         u32 inta, handled = 0;
4743         u32 inta_fh;
4744         unsigned long flags;
4745 #ifdef CONFIG_IWL3945_DEBUG
4746         u32 inta_mask;
4747 #endif
4748
4749         spin_lock_irqsave(&priv->lock, flags);
4750
4751         /* Ack/clear/reset pending uCode interrupts.
4752          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4753          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4754         inta = iwl3945_read32(priv, CSR_INT);
4755         iwl3945_write32(priv, CSR_INT, inta);
4756
4757         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4758          * Any new interrupts that happen after this, either while we're
4759          * in this tasklet, or later, will show up in next ISR/tasklet. */
4760         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4761         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4762
4763 #ifdef CONFIG_IWL3945_DEBUG
4764         if (iwl3945_debug_level & IWL_DL_ISR) {
4765                 /* just for debug */
4766                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4767                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4768                               inta, inta_mask, inta_fh);
4769         }
4770 #endif
4771
4772         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4773          * atomic, make sure that inta covers all the interrupts that
4774          * we've discovered, even if FH interrupt came in just after
4775          * reading CSR_INT. */
4776         if (inta_fh & CSR_FH_INT_RX_MASK)
4777                 inta |= CSR_INT_BIT_FH_RX;
4778         if (inta_fh & CSR_FH_INT_TX_MASK)
4779                 inta |= CSR_INT_BIT_FH_TX;
4780
4781         /* Now service all interrupt bits discovered above. */
4782         if (inta & CSR_INT_BIT_HW_ERR) {
4783                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4784
4785                 /* Tell the device to stop sending interrupts */
4786                 iwl3945_disable_interrupts(priv);
4787
4788                 iwl3945_irq_handle_error(priv);
4789
4790                 handled |= CSR_INT_BIT_HW_ERR;
4791
4792                 spin_unlock_irqrestore(&priv->lock, flags);
4793
4794                 return;
4795         }
4796
4797 #ifdef CONFIG_IWL3945_DEBUG
4798         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4799                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4800                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4801                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
4802
4803                 /* Alive notification via Rx interrupt will do the real work */
4804                 if (inta & CSR_INT_BIT_ALIVE)
4805                         IWL_DEBUG_ISR("Alive interrupt\n");
4806         }
4807 #endif
4808         /* Safely ignore these bits for debug checks below */
4809         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4810
4811         /* HW RF KILL switch toggled (4965 only) */
4812         if (inta & CSR_INT_BIT_RF_KILL) {
4813                 int hw_rf_kill = 0;
4814                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4815                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4816                         hw_rf_kill = 1;
4817
4818                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4819                                 "RF_KILL bit toggled to %s.\n",
4820                                 hw_rf_kill ? "disable radio":"enable radio");
4821
4822                 /* Queue restart only if RF_KILL switch was set to "kill"
4823                  *   when we loaded driver, and is now set to "enable".
4824                  * After we're Alive, RF_KILL gets handled by
4825                  *   iwl_rx_card_state_notif() */
4826                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4827                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4828                         queue_work(priv->workqueue, &priv->restart);
4829                 }
4830
4831                 handled |= CSR_INT_BIT_RF_KILL;
4832         }
4833
4834         /* Chip got too hot and stopped itself (4965 only) */
4835         if (inta & CSR_INT_BIT_CT_KILL) {
4836                 IWL_ERROR("Microcode CT kill error detected.\n");
4837                 handled |= CSR_INT_BIT_CT_KILL;
4838         }
4839
4840         /* Error detected by uCode */
4841         if (inta & CSR_INT_BIT_SW_ERR) {
4842                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4843                           inta);
4844                 iwl3945_irq_handle_error(priv);
4845                 handled |= CSR_INT_BIT_SW_ERR;
4846         }
4847
4848         /* uCode wakes up after power-down sleep */
4849         if (inta & CSR_INT_BIT_WAKEUP) {
4850                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4851                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4852                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4853                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4854                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4855                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4856                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4857                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4858
4859                 handled |= CSR_INT_BIT_WAKEUP;
4860         }
4861
4862         /* All uCode command responses, including Tx command responses,
4863          * Rx "responses" (frame-received notification), and other
4864          * notifications from uCode come through here*/
4865         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4866                 iwl3945_rx_handle(priv);
4867                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4868         }
4869
4870         if (inta & CSR_INT_BIT_FH_TX) {
4871                 IWL_DEBUG_ISR("Tx interrupt\n");
4872
4873                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4874                 if (!iwl3945_grab_nic_access(priv)) {
4875                         iwl3945_write_direct32(priv,
4876                                              FH_TCSR_CREDIT
4877                                              (ALM_FH_SRVC_CHNL), 0x0);
4878                         iwl3945_release_nic_access(priv);
4879                 }
4880                 handled |= CSR_INT_BIT_FH_TX;
4881         }
4882
4883         if (inta & ~handled)
4884                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4885
4886         if (inta & ~CSR_INI_SET_MASK) {
4887                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4888                          inta & ~CSR_INI_SET_MASK);
4889                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4890         }
4891
4892         /* Re-enable all interrupts */
4893         iwl3945_enable_interrupts(priv);
4894
4895 #ifdef CONFIG_IWL3945_DEBUG
4896         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4897                 inta = iwl3945_read32(priv, CSR_INT);
4898                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4899                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4900                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4901                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4902         }
4903 #endif
4904         spin_unlock_irqrestore(&priv->lock, flags);
4905 }
4906
4907 static irqreturn_t iwl3945_isr(int irq, void *data)
4908 {
4909         struct iwl3945_priv *priv = data;
4910         u32 inta, inta_mask;
4911         u32 inta_fh;
4912         if (!priv)
4913                 return IRQ_NONE;
4914
4915         spin_lock(&priv->lock);
4916
4917         /* Disable (but don't clear!) interrupts here to avoid
4918          *    back-to-back ISRs and sporadic interrupts from our NIC.
4919          * If we have something to service, the tasklet will re-enable ints.
4920          * If we *don't* have something, we'll re-enable before leaving here. */
4921         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4922         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4923
4924         /* Discover which interrupts are active/pending */
4925         inta = iwl3945_read32(priv, CSR_INT);
4926         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4927
4928         /* Ignore interrupt if there's nothing in NIC to service.
4929          * This may be due to IRQ shared with another device,
4930          * or due to sporadic interrupts thrown from our NIC. */
4931         if (!inta && !inta_fh) {
4932                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4933                 goto none;
4934         }
4935
4936         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4937                 /* Hardware disappeared */
4938                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4939                 goto unplugged;
4940         }
4941
4942         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4943                       inta, inta_mask, inta_fh);
4944
4945         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4946         tasklet_schedule(&priv->irq_tasklet);
4947 unplugged:
4948         spin_unlock(&priv->lock);
4949
4950         return IRQ_HANDLED;
4951
4952  none:
4953         /* re-enable interrupts here since we don't have anything to service. */
4954         iwl3945_enable_interrupts(priv);
4955         spin_unlock(&priv->lock);
4956         return IRQ_NONE;
4957 }
4958
4959 /************************** EEPROM BANDS ****************************
4960  *
4961  * The iwl3945_eeprom_band definitions below provide the mapping from the
4962  * EEPROM contents to the specific channel number supported for each
4963  * band.
4964  *
4965  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4966  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4967  * The specific geography and calibration information for that channel
4968  * is contained in the eeprom map itself.
4969  *
4970  * During init, we copy the eeprom information and channel map
4971  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4972  *
4973  * channel_map_24/52 provides the index in the channel_info array for a
4974  * given channel.  We have to have two separate maps as there is channel
4975  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4976  * band_2
4977  *
4978  * A value of 0xff stored in the channel_map indicates that the channel
4979  * is not supported by the hardware at all.
4980  *
4981  * A value of 0xfe in the channel_map indicates that the channel is not
4982  * valid for Tx with the current hardware.  This means that
4983  * while the system can tune and receive on a given channel, it may not
4984  * be able to associate or transmit any frames on that
4985  * channel.  There is no corresponding channel information for that
4986  * entry.
4987  *
4988  *********************************************************************/
4989
4990 /* 2.4 GHz */
4991 static const u8 iwl3945_eeprom_band_1[14] = {
4992         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4993 };
4994
4995 /* 5.2 GHz bands */
4996 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4997         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4998 };
4999
5000 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
5001         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5002 };
5003
5004 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
5005         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5006 };
5007
5008 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
5009         145, 149, 153, 157, 161, 165
5010 };
5011
5012 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
5013                                     int *eeprom_ch_count,
5014                                     const struct iwl3945_eeprom_channel
5015                                     **eeprom_ch_info,
5016                                     const u8 **eeprom_ch_index)
5017 {
5018         switch (band) {
5019         case 1:         /* 2.4GHz band */
5020                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
5021                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5022                 *eeprom_ch_index = iwl3945_eeprom_band_1;
5023                 break;
5024         case 2:         /* 4.9GHz band */
5025                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
5026                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5027                 *eeprom_ch_index = iwl3945_eeprom_band_2;
5028                 break;
5029         case 3:         /* 5.2GHz band */
5030                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
5031                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5032                 *eeprom_ch_index = iwl3945_eeprom_band_3;
5033                 break;
5034         case 4:         /* 5.5GHz band */
5035                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
5036                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5037                 *eeprom_ch_index = iwl3945_eeprom_band_4;
5038                 break;
5039         case 5:         /* 5.7GHz band */
5040                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
5041                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5042                 *eeprom_ch_index = iwl3945_eeprom_band_5;
5043                 break;
5044         default:
5045                 BUG();
5046                 return;
5047         }
5048 }
5049
5050 /**
5051  * iwl3945_get_channel_info - Find driver's private channel info
5052  *
5053  * Based on band and channel number.
5054  */
5055 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
5056                                                     int phymode, u16 channel)
5057 {
5058         int i;
5059
5060         switch (phymode) {
5061         case MODE_IEEE80211A:
5062                 for (i = 14; i < priv->channel_count; i++) {
5063                         if (priv->channel_info[i].channel == channel)
5064                                 return &priv->channel_info[i];
5065                 }
5066                 break;
5067
5068         case MODE_IEEE80211B:
5069         case MODE_IEEE80211G:
5070                 if (channel >= 1 && channel <= 14)
5071                         return &priv->channel_info[channel - 1];
5072                 break;
5073
5074         }
5075
5076         return NULL;
5077 }
5078
5079 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5080                             ? # x " " : "")
5081
5082 /**
5083  * iwl3945_init_channel_map - Set up driver's info for all possible channels
5084  */
5085 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
5086 {
5087         int eeprom_ch_count = 0;
5088         const u8 *eeprom_ch_index = NULL;
5089         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
5090         int band, ch;
5091         struct iwl3945_channel_info *ch_info;
5092
5093         if (priv->channel_count) {
5094                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5095                 return 0;
5096         }
5097
5098         if (priv->eeprom.version < 0x2f) {
5099                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5100                             priv->eeprom.version);
5101                 return -EINVAL;
5102         }
5103
5104         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5105
5106         priv->channel_count =
5107             ARRAY_SIZE(iwl3945_eeprom_band_1) +
5108             ARRAY_SIZE(iwl3945_eeprom_band_2) +
5109             ARRAY_SIZE(iwl3945_eeprom_band_3) +
5110             ARRAY_SIZE(iwl3945_eeprom_band_4) +
5111             ARRAY_SIZE(iwl3945_eeprom_band_5);
5112
5113         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5114
5115         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
5116                                      priv->channel_count, GFP_KERNEL);
5117         if (!priv->channel_info) {
5118                 IWL_ERROR("Could not allocate channel_info\n");
5119                 priv->channel_count = 0;
5120                 return -ENOMEM;
5121         }
5122
5123         ch_info = priv->channel_info;
5124
5125         /* Loop through the 5 EEPROM bands adding them in order to the
5126          * channel map we maintain (that contains additional information than
5127          * what just in the EEPROM) */
5128         for (band = 1; band <= 5; band++) {
5129
5130                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
5131                                         &eeprom_ch_info, &eeprom_ch_index);
5132
5133                 /* Loop through each band adding each of the channels */
5134                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5135                         ch_info->channel = eeprom_ch_index[ch];
5136                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5137                             MODE_IEEE80211A;
5138
5139                         /* permanently store EEPROM's channel regulatory flags
5140                          *   and max power in channel info database. */
5141                         ch_info->eeprom = eeprom_ch_info[ch];
5142
5143                         /* Copy the run-time flags so they are there even on
5144                          * invalid channels */
5145                         ch_info->flags = eeprom_ch_info[ch].flags;
5146
5147                         if (!(is_channel_valid(ch_info))) {
5148                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5149                                                "No traffic\n",
5150                                                ch_info->channel,
5151                                                ch_info->flags,
5152                                                is_channel_a_band(ch_info) ?
5153                                                "5.2" : "2.4");
5154                                 ch_info++;
5155                                 continue;
5156                         }
5157
5158                         /* Initialize regulatory-based run-time data */
5159                         ch_info->max_power_avg = ch_info->curr_txpow =
5160                             eeprom_ch_info[ch].max_power_avg;
5161                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5162                         ch_info->min_power = 0;
5163
5164                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5165                                        " %ddBm): Ad-Hoc %ssupported\n",
5166                                        ch_info->channel,
5167                                        is_channel_a_band(ch_info) ?
5168                                        "5.2" : "2.4",
5169                                        CHECK_AND_PRINT(IBSS),
5170                                        CHECK_AND_PRINT(ACTIVE),
5171                                        CHECK_AND_PRINT(RADAR),
5172                                        CHECK_AND_PRINT(WIDE),
5173                                        CHECK_AND_PRINT(NARROW),
5174                                        CHECK_AND_PRINT(DFS),
5175                                        eeprom_ch_info[ch].flags,
5176                                        eeprom_ch_info[ch].max_power_avg,
5177                                        ((eeprom_ch_info[ch].
5178                                          flags & EEPROM_CHANNEL_IBSS)
5179                                         && !(eeprom_ch_info[ch].
5180                                              flags & EEPROM_CHANNEL_RADAR))
5181                                        ? "" : "not ");
5182
5183                         /* Set the user_txpower_limit to the highest power
5184                          * supported by any channel */
5185                         if (eeprom_ch_info[ch].max_power_avg >
5186                             priv->user_txpower_limit)
5187                                 priv->user_txpower_limit =
5188                                     eeprom_ch_info[ch].max_power_avg;
5189
5190                         ch_info++;
5191                 }
5192         }
5193
5194         /* Set up txpower settings in driver for all channels */
5195         if (iwl3945_txpower_set_from_eeprom(priv))
5196                 return -EIO;
5197
5198         return 0;
5199 }
5200
5201 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5202  * sending probe req.  This should be set long enough to hear probe responses
5203  * from more than one AP.  */
5204 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5205 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5206
5207 /* For faster active scanning, scan will move to the next channel if fewer than
5208  * PLCP_QUIET_THRESH packets are heard on this channel within
5209  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5210  * time if it's a quiet channel (nothing responded to our probe, and there's
5211  * no other traffic).
5212  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5213 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5214 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5215
5216 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5217  * Must be set longer than active dwell time.
5218  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5219 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5220 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5221 #define IWL_PASSIVE_DWELL_BASE      (100)
5222 #define IWL_CHANNEL_TUNE_TIME       5
5223
5224 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv, int phymode)
5225 {
5226         if (phymode == MODE_IEEE80211A)
5227                 return IWL_ACTIVE_DWELL_TIME_52;
5228         else
5229                 return IWL_ACTIVE_DWELL_TIME_24;
5230 }
5231
5232 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv, int phymode)
5233 {
5234         u16 active = iwl3945_get_active_dwell_time(priv, phymode);
5235         u16 passive = (phymode != MODE_IEEE80211A) ?
5236             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5237             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5238
5239         if (iwl3945_is_associated(priv)) {
5240                 /* If we're associated, we clamp the maximum passive
5241                  * dwell time to be 98% of the beacon interval (minus
5242                  * 2 * channel tune time) */
5243                 passive = priv->beacon_int;
5244                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5245                         passive = IWL_PASSIVE_DWELL_BASE;
5246                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5247         }
5248
5249         if (passive <= active)
5250                 passive = active + 1;
5251
5252         return passive;
5253 }
5254
5255 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv, int phymode,
5256                                      u8 is_active, u8 direct_mask,
5257                                      struct iwl3945_scan_channel *scan_ch)
5258 {
5259         const struct ieee80211_channel *channels = NULL;
5260         const struct ieee80211_hw_mode *hw_mode;
5261         const struct iwl3945_channel_info *ch_info;
5262         u16 passive_dwell = 0;
5263         u16 active_dwell = 0;
5264         int added, i;
5265
5266         hw_mode = iwl3945_get_hw_mode(priv, phymode);
5267         if (!hw_mode)
5268                 return 0;
5269
5270         channels = hw_mode->channels;
5271
5272         active_dwell = iwl3945_get_active_dwell_time(priv, phymode);
5273         passive_dwell = iwl3945_get_passive_dwell_time(priv, phymode);
5274
5275         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5276                 if (channels[i].chan ==
5277                     le16_to_cpu(priv->active_rxon.channel)) {
5278                         if (iwl3945_is_associated(priv)) {
5279                                 IWL_DEBUG_SCAN
5280                                     ("Skipping current channel %d\n",
5281                                      le16_to_cpu(priv->active_rxon.channel));
5282                                 continue;
5283                         }
5284                 } else if (priv->only_active_channel)
5285                         continue;
5286
5287                 scan_ch->channel = channels[i].chan;
5288
5289                 ch_info = iwl3945_get_channel_info(priv, phymode, scan_ch->channel);
5290                 if (!is_channel_valid(ch_info)) {
5291                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5292                                        scan_ch->channel);
5293                         continue;
5294                 }
5295
5296                 if (!is_active || is_channel_passive(ch_info) ||
5297                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5298                         scan_ch->type = 0;      /* passive */
5299                 else
5300                         scan_ch->type = 1;      /* active */
5301
5302                 if (scan_ch->type & 1)
5303                         scan_ch->type |= (direct_mask << 1);
5304
5305                 if (is_channel_narrow(ch_info))
5306                         scan_ch->type |= (1 << 7);
5307
5308                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5309                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5310
5311                 /* Set txpower levels to defaults */
5312                 scan_ch->tpc.dsp_atten = 110;
5313                 /* scan_pwr_info->tpc.dsp_atten; */
5314
5315                 /*scan_pwr_info->tpc.tx_gain; */
5316                 if (phymode == MODE_IEEE80211A)
5317                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5318                 else {
5319                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5320                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5321                          * power level:
5322                          * scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5323                          */
5324                 }
5325
5326                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5327                                scan_ch->channel,
5328                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5329                                (scan_ch->type & 1) ?
5330                                active_dwell : passive_dwell);
5331
5332                 scan_ch++;
5333                 added++;
5334         }
5335
5336         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5337         return added;
5338 }
5339
5340 static void iwl3945_reset_channel_flag(struct iwl3945_priv *priv)
5341 {
5342         int i, j;
5343         for (i = 0; i < 3; i++) {
5344                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5345                 for (j = 0; j < hw_mode->num_channels; j++)
5346                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5347         }
5348 }
5349
5350 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5351                               struct ieee80211_rate *rates)
5352 {
5353         int i;
5354
5355         for (i = 0; i < IWL_RATE_COUNT; i++) {
5356                 rates[i].rate = iwl3945_rates[i].ieee * 5;
5357                 rates[i].val = i; /* Rate scaling will work on indexes */
5358                 rates[i].val2 = i;
5359                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5360                 /* Only OFDM have the bits-per-symbol set */
5361                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5362                         rates[i].flags |= IEEE80211_RATE_OFDM;
5363                 else {
5364                         /*
5365                          * If CCK 1M then set rate flag to CCK else CCK_2
5366                          * which is CCK | PREAMBLE2
5367                          */
5368                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5369                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5370                 }
5371
5372                 /* Set up which ones are basic rates... */
5373                 if (IWL_BASIC_RATES_MASK & (1 << i))
5374                         rates[i].flags |= IEEE80211_RATE_BASIC;
5375         }
5376 }
5377
5378 /**
5379  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5380  */
5381 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5382 {
5383         struct iwl3945_channel_info *ch;
5384         struct ieee80211_hw_mode *modes;
5385         struct ieee80211_channel *channels;
5386         struct ieee80211_channel *geo_ch;
5387         struct ieee80211_rate *rates;
5388         int i = 0;
5389         enum {
5390                 A = 0,
5391                 B = 1,
5392                 G = 2,
5393         };
5394         int mode_count = 3;
5395
5396         if (priv->modes) {
5397                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5398                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5399                 return 0;
5400         }
5401
5402         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5403                         GFP_KERNEL);
5404         if (!modes)
5405                 return -ENOMEM;
5406
5407         channels = kzalloc(sizeof(struct ieee80211_channel) *
5408                            priv->channel_count, GFP_KERNEL);
5409         if (!channels) {
5410                 kfree(modes);
5411                 return -ENOMEM;
5412         }
5413
5414         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5415                         GFP_KERNEL);
5416         if (!rates) {
5417                 kfree(modes);
5418                 kfree(channels);
5419                 return -ENOMEM;
5420         }
5421
5422         /* 0 = 802.11a
5423          * 1 = 802.11b
5424          * 2 = 802.11g
5425          */
5426
5427         /* 5.2GHz channels start after the 2.4GHz channels */
5428         modes[A].mode = MODE_IEEE80211A;
5429         modes[A].channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5430         modes[A].rates = &rates[4];
5431         modes[A].num_rates = 8; /* just OFDM */
5432         modes[A].num_channels = 0;
5433
5434         modes[B].mode = MODE_IEEE80211B;
5435         modes[B].channels = channels;
5436         modes[B].rates = rates;
5437         modes[B].num_rates = 4; /* just CCK */
5438         modes[B].num_channels = 0;
5439
5440         modes[G].mode = MODE_IEEE80211G;
5441         modes[G].channels = channels;
5442         modes[G].rates = rates;
5443         modes[G].num_rates = 12;        /* OFDM & CCK */
5444         modes[G].num_channels = 0;
5445
5446         priv->ieee_channels = channels;
5447         priv->ieee_rates = rates;
5448
5449         iwl3945_init_hw_rates(priv, rates);
5450
5451         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5452                 ch = &priv->channel_info[i];
5453
5454                 if (!is_channel_valid(ch)) {
5455                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5456                                     "skipping.\n",
5457                                     ch->channel, is_channel_a_band(ch) ?
5458                                     "5.2" : "2.4");
5459                         continue;
5460                 }
5461
5462                 if (is_channel_a_band(ch))
5463                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5464                 else {
5465                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5466                         modes[G].num_channels++;
5467                 }
5468
5469                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5470                 geo_ch->chan = ch->channel;
5471                 geo_ch->power_level = ch->max_power_avg;
5472                 geo_ch->antenna_max = 0xff;
5473
5474                 if (is_channel_valid(ch)) {
5475                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5476                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5477                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5478
5479                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5480                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5481
5482                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5483                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5484
5485                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5486                                 priv->max_channel_txpower_limit =
5487                                     ch->max_power_avg;
5488                 }
5489
5490                 geo_ch->val = geo_ch->flag;
5491         }
5492
5493         if ((modes[A].num_channels == 0) && priv->is_abg) {
5494                 printk(KERN_INFO DRV_NAME
5495                        ": Incorrectly detected BG card as ABG.  Please send "
5496                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5497                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5498                 priv->is_abg = 0;
5499         }
5500
5501         printk(KERN_INFO DRV_NAME
5502                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5503                modes[G].num_channels, modes[A].num_channels);
5504
5505         /*
5506          * NOTE:  We register these in preference of order -- the
5507          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5508          * a phymode based on rates or AP capabilities but seems to
5509          * configure it purely on if the channel being configured
5510          * is supported by a mode -- and the first match is taken
5511          */
5512
5513         if (modes[G].num_channels)
5514                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5515         if (modes[B].num_channels)
5516                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5517         if (modes[A].num_channels)
5518                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5519
5520         priv->modes = modes;
5521         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5522
5523         return 0;
5524 }
5525
5526 /******************************************************************************
5527  *
5528  * uCode download functions
5529  *
5530  ******************************************************************************/
5531
5532 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5533 {
5534         if (priv->ucode_code.v_addr != NULL) {
5535                 pci_free_consistent(priv->pci_dev,
5536                                     priv->ucode_code.len,
5537                                     priv->ucode_code.v_addr,
5538                                     priv->ucode_code.p_addr);
5539                 priv->ucode_code.v_addr = NULL;
5540         }
5541         if (priv->ucode_data.v_addr != NULL) {
5542                 pci_free_consistent(priv->pci_dev,
5543                                     priv->ucode_data.len,
5544                                     priv->ucode_data.v_addr,
5545                                     priv->ucode_data.p_addr);
5546                 priv->ucode_data.v_addr = NULL;
5547         }
5548         if (priv->ucode_data_backup.v_addr != NULL) {
5549                 pci_free_consistent(priv->pci_dev,
5550                                     priv->ucode_data_backup.len,
5551                                     priv->ucode_data_backup.v_addr,
5552                                     priv->ucode_data_backup.p_addr);
5553                 priv->ucode_data_backup.v_addr = NULL;
5554         }
5555         if (priv->ucode_init.v_addr != NULL) {
5556                 pci_free_consistent(priv->pci_dev,
5557                                     priv->ucode_init.len,
5558                                     priv->ucode_init.v_addr,
5559                                     priv->ucode_init.p_addr);
5560                 priv->ucode_init.v_addr = NULL;
5561         }
5562         if (priv->ucode_init_data.v_addr != NULL) {
5563                 pci_free_consistent(priv->pci_dev,
5564                                     priv->ucode_init_data.len,
5565                                     priv->ucode_init_data.v_addr,
5566                                     priv->ucode_init_data.p_addr);
5567                 priv->ucode_init_data.v_addr = NULL;
5568         }
5569         if (priv->ucode_boot.v_addr != NULL) {
5570                 pci_free_consistent(priv->pci_dev,
5571                                     priv->ucode_boot.len,
5572                                     priv->ucode_boot.v_addr,
5573                                     priv->ucode_boot.p_addr);
5574                 priv->ucode_boot.v_addr = NULL;
5575         }
5576 }
5577
5578 /**
5579  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5580  *     looking at all data.
5581  */
5582 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5583 {
5584         u32 val;
5585         u32 save_len = len;
5586         int rc = 0;
5587         u32 errcnt;
5588
5589         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5590
5591         rc = iwl3945_grab_nic_access(priv);
5592         if (rc)
5593                 return rc;
5594
5595         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5596
5597         errcnt = 0;
5598         for (; len > 0; len -= sizeof(u32), image++) {
5599                 /* read data comes through single port, auto-incr addr */
5600                 /* NOTE: Use the debugless read so we don't flood kernel log
5601                  * if IWL_DL_IO is set */
5602                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5603                 if (val != le32_to_cpu(*image)) {
5604                         IWL_ERROR("uCode INST section is invalid at "
5605                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5606                                   save_len - len, val, le32_to_cpu(*image));
5607                         rc = -EIO;
5608                         errcnt++;
5609                         if (errcnt >= 20)
5610                                 break;
5611                 }
5612         }
5613
5614         iwl3945_release_nic_access(priv);
5615
5616         if (!errcnt)
5617                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5618
5619         return rc;
5620 }
5621
5622
5623 /**
5624  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5625  *   using sample data 100 bytes apart.  If these sample points are good,
5626  *   it's a pretty good bet that everything between them is good, too.
5627  */
5628 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5629 {
5630         u32 val;
5631         int rc = 0;
5632         u32 errcnt = 0;
5633         u32 i;
5634
5635         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5636
5637         rc = iwl3945_grab_nic_access(priv);
5638         if (rc)
5639                 return rc;
5640
5641         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5642                 /* read data comes through single port, auto-incr addr */
5643                 /* NOTE: Use the debugless read so we don't flood kernel log
5644                  * if IWL_DL_IO is set */
5645                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5646                         i + RTC_INST_LOWER_BOUND);
5647                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5648                 if (val != le32_to_cpu(*image)) {
5649 #if 0 /* Enable this if you want to see details */
5650                         IWL_ERROR("uCode INST section is invalid at "
5651                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5652                                   i, val, *image);
5653 #endif
5654                         rc = -EIO;
5655                         errcnt++;
5656                         if (errcnt >= 3)
5657                                 break;
5658                 }
5659         }
5660
5661         iwl3945_release_nic_access(priv);
5662
5663         return rc;
5664 }
5665
5666
5667 /**
5668  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5669  *    and verify its contents
5670  */
5671 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5672 {
5673         __le32 *image;
5674         u32 len;
5675         int rc = 0;
5676
5677         /* Try bootstrap */
5678         image = (__le32 *)priv->ucode_boot.v_addr;
5679         len = priv->ucode_boot.len;
5680         rc = iwl3945_verify_inst_sparse(priv, image, len);
5681         if (rc == 0) {
5682                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5683                 return 0;
5684         }
5685
5686         /* Try initialize */
5687         image = (__le32 *)priv->ucode_init.v_addr;
5688         len = priv->ucode_init.len;
5689         rc = iwl3945_verify_inst_sparse(priv, image, len);
5690         if (rc == 0) {
5691                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5692                 return 0;
5693         }
5694
5695         /* Try runtime/protocol */
5696         image = (__le32 *)priv->ucode_code.v_addr;
5697         len = priv->ucode_code.len;
5698         rc = iwl3945_verify_inst_sparse(priv, image, len);
5699         if (rc == 0) {
5700                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5701                 return 0;
5702         }
5703
5704         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5705
5706         /* Since nothing seems to match, show first several data entries in
5707          * instruction SRAM, so maybe visual inspection will give a clue.
5708          * Selection of bootstrap image (vs. other images) is arbitrary. */
5709         image = (__le32 *)priv->ucode_boot.v_addr;
5710         len = priv->ucode_boot.len;
5711         rc = iwl3945_verify_inst_full(priv, image, len);
5712
5713         return rc;
5714 }
5715
5716
5717 /* check contents of special bootstrap uCode SRAM */
5718 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5719 {
5720         __le32 *image = priv->ucode_boot.v_addr;
5721         u32 len = priv->ucode_boot.len;
5722         u32 reg;
5723         u32 val;
5724
5725         IWL_DEBUG_INFO("Begin verify bsm\n");
5726
5727         /* verify BSM SRAM contents */
5728         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5729         for (reg = BSM_SRAM_LOWER_BOUND;
5730              reg < BSM_SRAM_LOWER_BOUND + len;
5731              reg += sizeof(u32), image ++) {
5732                 val = iwl3945_read_prph(priv, reg);
5733                 if (val != le32_to_cpu(*image)) {
5734                         IWL_ERROR("BSM uCode verification failed at "
5735                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5736                                   BSM_SRAM_LOWER_BOUND,
5737                                   reg - BSM_SRAM_LOWER_BOUND, len,
5738                                   val, le32_to_cpu(*image));
5739                         return -EIO;
5740                 }
5741         }
5742
5743         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5744
5745         return 0;
5746 }
5747
5748 /**
5749  * iwl3945_load_bsm - Load bootstrap instructions
5750  *
5751  * BSM operation:
5752  *
5753  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5754  * in special SRAM that does not power down during RFKILL.  When powering back
5755  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5756  * the bootstrap program into the on-board processor, and starts it.
5757  *
5758  * The bootstrap program loads (via DMA) instructions and data for a new
5759  * program from host DRAM locations indicated by the host driver in the
5760  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5761  * automatically.
5762  *
5763  * When initializing the NIC, the host driver points the BSM to the
5764  * "initialize" uCode image.  This uCode sets up some internal data, then
5765  * notifies host via "initialize alive" that it is complete.
5766  *
5767  * The host then replaces the BSM_DRAM_* pointer values to point to the
5768  * normal runtime uCode instructions and a backup uCode data cache buffer
5769  * (filled initially with starting data values for the on-board processor),
5770  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5771  * which begins normal operation.
5772  *
5773  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5774  * the backup data cache in DRAM before SRAM is powered down.
5775  *
5776  * When powering back up, the BSM loads the bootstrap program.  This reloads
5777  * the runtime uCode instructions and the backup data cache into SRAM,
5778  * and re-launches the runtime uCode from where it left off.
5779  */
5780 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5781 {
5782         __le32 *image = priv->ucode_boot.v_addr;
5783         u32 len = priv->ucode_boot.len;
5784         dma_addr_t pinst;
5785         dma_addr_t pdata;
5786         u32 inst_len;
5787         u32 data_len;
5788         int rc;
5789         int i;
5790         u32 done;
5791         u32 reg_offset;
5792
5793         IWL_DEBUG_INFO("Begin load bsm\n");
5794
5795         /* make sure bootstrap program is no larger than BSM's SRAM size */
5796         if (len > IWL_MAX_BSM_SIZE)
5797                 return -EINVAL;
5798
5799         /* Tell bootstrap uCode where to find the "Initialize" uCode
5800          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5801          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5802          *        after the "initialize" uCode has run, to point to
5803          *        runtime/protocol instructions and backup data cache. */
5804         pinst = priv->ucode_init.p_addr;
5805         pdata = priv->ucode_init_data.p_addr;
5806         inst_len = priv->ucode_init.len;
5807         data_len = priv->ucode_init_data.len;
5808
5809         rc = iwl3945_grab_nic_access(priv);
5810         if (rc)
5811                 return rc;
5812
5813         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5814         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5815         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5816         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5817
5818         /* Fill BSM memory with bootstrap instructions */
5819         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5820              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5821              reg_offset += sizeof(u32), image++)
5822                 _iwl3945_write_prph(priv, reg_offset,
5823                                           le32_to_cpu(*image));
5824
5825         rc = iwl3945_verify_bsm(priv);
5826         if (rc) {
5827                 iwl3945_release_nic_access(priv);
5828                 return rc;
5829         }
5830
5831         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5832         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5833         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5834                                  RTC_INST_LOWER_BOUND);
5835         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5836
5837         /* Load bootstrap code into instruction SRAM now,
5838          *   to prepare to load "initialize" uCode */
5839         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5840                 BSM_WR_CTRL_REG_BIT_START);
5841
5842         /* Wait for load of bootstrap uCode to finish */
5843         for (i = 0; i < 100; i++) {
5844                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5845                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5846                         break;
5847                 udelay(10);
5848         }
5849         if (i < 100)
5850                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5851         else {
5852                 IWL_ERROR("BSM write did not complete!\n");
5853                 return -EIO;
5854         }
5855
5856         /* Enable future boot loads whenever power management unit triggers it
5857          *   (e.g. when powering back up after power-save shutdown) */
5858         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5859                 BSM_WR_CTRL_REG_BIT_START_EN);
5860
5861         iwl3945_release_nic_access(priv);
5862
5863         return 0;
5864 }
5865
5866 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5867 {
5868         /* Remove all resets to allow NIC to operate */
5869         iwl3945_write32(priv, CSR_RESET, 0);
5870 }
5871
5872 static int iwl3945_alloc_fw_desc(struct pci_dev *pci_dev, struct fw_desc *desc)
5873 {
5874         desc->v_addr = pci_alloc_consistent(pci_dev, desc->len, &desc->p_addr);
5875         return (desc->v_addr != NULL) ? 0 : -ENOMEM;
5876 }
5877
5878 /**
5879  * iwl3945_read_ucode - Read uCode images from disk file.
5880  *
5881  * Copy into buffers for card to fetch via bus-mastering
5882  */
5883 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5884 {
5885         struct iwl3945_ucode *ucode;
5886         int ret = 0;
5887         const struct firmware *ucode_raw;
5888         /* firmware file name contains uCode/driver compatibility version */
5889         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5890         u8 *src;
5891         size_t len;
5892         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5893
5894         /* Ask kernel firmware_class module to get the boot firmware off disk.
5895          * request_firmware() is synchronous, file is in memory on return. */
5896         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5897         if (ret < 0) {
5898                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5899                                 name, ret);
5900                 goto error;
5901         }
5902
5903         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5904                        name, ucode_raw->size);
5905
5906         /* Make sure that we got at least our header! */
5907         if (ucode_raw->size < sizeof(*ucode)) {
5908                 IWL_ERROR("File size way too small!\n");
5909                 ret = -EINVAL;
5910                 goto err_release;
5911         }
5912
5913         /* Data from ucode file:  header followed by uCode images */
5914         ucode = (void *)ucode_raw->data;
5915
5916         ver = le32_to_cpu(ucode->ver);
5917         inst_size = le32_to_cpu(ucode->inst_size);
5918         data_size = le32_to_cpu(ucode->data_size);
5919         init_size = le32_to_cpu(ucode->init_size);
5920         init_data_size = le32_to_cpu(ucode->init_data_size);
5921         boot_size = le32_to_cpu(ucode->boot_size);
5922
5923         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5924         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5925         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5926         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5927         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5928         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5929
5930         /* Verify size of file vs. image size info in file's header */
5931         if (ucode_raw->size < sizeof(*ucode) +
5932                 inst_size + data_size + init_size +
5933                 init_data_size + boot_size) {
5934
5935                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5936                                (int)ucode_raw->size);
5937                 ret = -EINVAL;
5938                 goto err_release;
5939         }
5940
5941         /* Verify that uCode images will fit in card's SRAM */
5942         if (inst_size > IWL_MAX_INST_SIZE) {
5943                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5944                                inst_size);
5945                 ret = -EINVAL;
5946                 goto err_release;
5947         }
5948
5949         if (data_size > IWL_MAX_DATA_SIZE) {
5950                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5951                                data_size);
5952                 ret = -EINVAL;
5953                 goto err_release;
5954         }
5955         if (init_size > IWL_MAX_INST_SIZE) {
5956                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5957                                 init_size);
5958                 ret = -EINVAL;
5959                 goto err_release;
5960         }
5961         if (init_data_size > IWL_MAX_DATA_SIZE) {
5962                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5963                                 init_data_size);
5964                 ret = -EINVAL;
5965                 goto err_release;
5966         }
5967         if (boot_size > IWL_MAX_BSM_SIZE) {
5968                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5969                                 boot_size);
5970                 ret = -EINVAL;
5971                 goto err_release;
5972         }
5973
5974         /* Allocate ucode buffers for card's bus-master loading ... */
5975
5976         /* Runtime instructions and 2 copies of data:
5977          * 1) unmodified from disk
5978          * 2) backup cache for save/restore during power-downs */
5979         priv->ucode_code.len = inst_size;
5980         iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5981
5982         priv->ucode_data.len = data_size;
5983         iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5984
5985         priv->ucode_data_backup.len = data_size;
5986         iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5987
5988         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5989             !priv->ucode_data_backup.v_addr)
5990                 goto err_pci_alloc;
5991
5992         /* Initialization instructions and data */
5993         if (init_size && init_data_size) {
5994                 priv->ucode_init.len = init_size;
5995                 iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5996
5997                 priv->ucode_init_data.len = init_data_size;
5998                 iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5999
6000                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6001                         goto err_pci_alloc;
6002         }
6003
6004         /* Bootstrap (instructions only, no data) */
6005         if (boot_size) {
6006                 priv->ucode_boot.len = boot_size;
6007                 iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6008
6009                 if (!priv->ucode_boot.v_addr)
6010                         goto err_pci_alloc;
6011         }
6012
6013         /* Copy images into buffers for card's bus-master reads ... */
6014
6015         /* Runtime instructions (first block of data in file) */
6016         src = &ucode->data[0];
6017         len = priv->ucode_code.len;
6018         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6019         memcpy(priv->ucode_code.v_addr, src, len);
6020         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6021                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6022
6023         /* Runtime data (2nd block)
6024          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
6025         src = &ucode->data[inst_size];
6026         len = priv->ucode_data.len;
6027         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6028         memcpy(priv->ucode_data.v_addr, src, len);
6029         memcpy(priv->ucode_data_backup.v_addr, src, len);
6030
6031         /* Initialization instructions (3rd block) */
6032         if (init_size) {
6033                 src = &ucode->data[inst_size + data_size];
6034                 len = priv->ucode_init.len;
6035                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6036                                len);
6037                 memcpy(priv->ucode_init.v_addr, src, len);
6038         }
6039
6040         /* Initialization data (4th block) */
6041         if (init_data_size) {
6042                 src = &ucode->data[inst_size + data_size + init_size];
6043                 len = priv->ucode_init_data.len;
6044                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6045                                (int)len);
6046                 memcpy(priv->ucode_init_data.v_addr, src, len);
6047         }
6048
6049         /* Bootstrap instructions (5th block) */
6050         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6051         len = priv->ucode_boot.len;
6052         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6053                        (int)len);
6054         memcpy(priv->ucode_boot.v_addr, src, len);
6055
6056         /* We have our copies now, allow OS release its copies */
6057         release_firmware(ucode_raw);
6058         return 0;
6059
6060  err_pci_alloc:
6061         IWL_ERROR("failed to allocate pci memory\n");
6062         ret = -ENOMEM;
6063         iwl3945_dealloc_ucode_pci(priv);
6064
6065  err_release:
6066         release_firmware(ucode_raw);
6067
6068  error:
6069         return ret;
6070 }
6071
6072
6073 /**
6074  * iwl3945_set_ucode_ptrs - Set uCode address location
6075  *
6076  * Tell initialization uCode where to find runtime uCode.
6077  *
6078  * BSM registers initially contain pointers to initialization uCode.
6079  * We need to replace them to load runtime uCode inst and data,
6080  * and to save runtime data when powering down.
6081  */
6082 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
6083 {
6084         dma_addr_t pinst;
6085         dma_addr_t pdata;
6086         int rc = 0;
6087         unsigned long flags;
6088
6089         /* bits 31:0 for 3945 */
6090         pinst = priv->ucode_code.p_addr;
6091         pdata = priv->ucode_data_backup.p_addr;
6092
6093         spin_lock_irqsave(&priv->lock, flags);
6094         rc = iwl3945_grab_nic_access(priv);
6095         if (rc) {
6096                 spin_unlock_irqrestore(&priv->lock, flags);
6097                 return rc;
6098         }
6099
6100         /* Tell bootstrap uCode where to find image to load */
6101         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6102         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6103         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6104                                  priv->ucode_data.len);
6105
6106         /* Inst bytecount must be last to set up, bit 31 signals uCode
6107          *   that all new ptr/size info is in place */
6108         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6109                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6110
6111         iwl3945_release_nic_access(priv);
6112
6113         spin_unlock_irqrestore(&priv->lock, flags);
6114
6115         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6116
6117         return rc;
6118 }
6119
6120 /**
6121  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
6122  *
6123  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6124  *
6125  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6126  */
6127 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
6128 {
6129         /* Check alive response for "valid" sign from uCode */
6130         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6131                 /* We had an error bringing up the hardware, so take it
6132                  * all the way back down so we can try again */
6133                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6134                 goto restart;
6135         }
6136
6137         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6138          * This is a paranoid check, because we would not have gotten the
6139          * "initialize" alive if code weren't properly loaded.  */
6140         if (iwl3945_verify_ucode(priv)) {
6141                 /* Runtime instruction load was bad;
6142                  * take it all the way back down so we can try again */
6143                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6144                 goto restart;
6145         }
6146
6147         /* Send pointers to protocol/runtime uCode image ... init code will
6148          * load and launch runtime uCode, which will send us another "Alive"
6149          * notification. */
6150         IWL_DEBUG_INFO("Initialization Alive received.\n");
6151         if (iwl3945_set_ucode_ptrs(priv)) {
6152                 /* Runtime instruction load won't happen;
6153                  * take it all the way back down so we can try again */
6154                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6155                 goto restart;
6156         }
6157         return;
6158
6159  restart:
6160         queue_work(priv->workqueue, &priv->restart);
6161 }
6162
6163
6164 /**
6165  * iwl3945_alive_start - called after REPLY_ALIVE notification received
6166  *                   from protocol/runtime uCode (initialization uCode's
6167  *                   Alive gets handled by iwl3945_init_alive_start()).
6168  */
6169 static void iwl3945_alive_start(struct iwl3945_priv *priv)
6170 {
6171         int rc = 0;
6172         int thermal_spin = 0;
6173         u32 rfkill;
6174
6175         IWL_DEBUG_INFO("Runtime Alive received.\n");
6176
6177         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6178                 /* We had an error bringing up the hardware, so take it
6179                  * all the way back down so we can try again */
6180                 IWL_DEBUG_INFO("Alive failed.\n");
6181                 goto restart;
6182         }
6183
6184         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6185          * This is a paranoid check, because we would not have gotten the
6186          * "runtime" alive if code weren't properly loaded.  */
6187         if (iwl3945_verify_ucode(priv)) {
6188                 /* Runtime instruction load was bad;
6189                  * take it all the way back down so we can try again */
6190                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6191                 goto restart;
6192         }
6193
6194         iwl3945_clear_stations_table(priv);
6195
6196         rc = iwl3945_grab_nic_access(priv);
6197         if (rc) {
6198                 IWL_WARNING("Can not read rfkill status from adapter\n");
6199                 return;
6200         }
6201
6202         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
6203         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6204         iwl3945_release_nic_access(priv);
6205
6206         if (rfkill & 0x1) {
6207                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6208                 /* if rfkill is not on, then wait for thermal
6209                  * sensor in adapter to kick in */
6210                 while (iwl3945_hw_get_temperature(priv) == 0) {
6211                         thermal_spin++;
6212                         udelay(10);
6213                 }
6214
6215                 if (thermal_spin)
6216                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6217                                        thermal_spin * 10);
6218         } else
6219                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6220
6221         /* After the ALIVE response, we can send commands to 3945 uCode */
6222         set_bit(STATUS_ALIVE, &priv->status);
6223
6224         /* Clear out the uCode error bit if it is set */
6225         clear_bit(STATUS_FW_ERROR, &priv->status);
6226
6227         rc = iwl3945_init_channel_map(priv);
6228         if (rc) {
6229                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6230                 return;
6231         }
6232
6233         iwl3945_init_geos(priv);
6234
6235         if (iwl3945_is_rfkill(priv))
6236                 return;
6237
6238         if (!priv->mac80211_registered) {
6239                 /* Unlock so any user space entry points can call back into
6240                  * the driver without a deadlock... */
6241                 mutex_unlock(&priv->mutex);
6242                 iwl3945_rate_control_register(priv->hw);
6243                 rc = ieee80211_register_hw(priv->hw);
6244                 priv->hw->conf.beacon_int = 100;
6245                 mutex_lock(&priv->mutex);
6246
6247                 if (rc) {
6248                         iwl3945_rate_control_unregister(priv->hw);
6249                         IWL_ERROR("Failed to register network "
6250                                   "device (error %d)\n", rc);
6251                         return;
6252                 }
6253
6254                 priv->mac80211_registered = 1;
6255
6256                 iwl3945_reset_channel_flag(priv);
6257         } else
6258                 ieee80211_start_queues(priv->hw);
6259
6260         priv->active_rate = priv->rates_mask;
6261         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6262
6263         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6264
6265         if (iwl3945_is_associated(priv)) {
6266                 struct iwl3945_rxon_cmd *active_rxon =
6267                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
6268
6269                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6270                        sizeof(priv->staging_rxon));
6271                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6272         } else {
6273                 /* Initialize our rx_config data */
6274                 iwl3945_connection_init_rx_config(priv);
6275                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6276         }
6277
6278         /* Configure Bluetooth device coexistence support */
6279         iwl3945_send_bt_config(priv);
6280
6281         /* Configure the adapter for unassociated operation */
6282         iwl3945_commit_rxon(priv);
6283
6284         /* At this point, the NIC is initialized and operational */
6285         priv->notif_missed_beacons = 0;
6286         set_bit(STATUS_READY, &priv->status);
6287
6288         iwl3945_reg_txpower_periodic(priv);
6289
6290         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6291
6292         if (priv->error_recovering)
6293                 iwl3945_error_recovery(priv);
6294
6295         return;
6296
6297  restart:
6298         queue_work(priv->workqueue, &priv->restart);
6299 }
6300
6301 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
6302
6303 static void __iwl3945_down(struct iwl3945_priv *priv)
6304 {
6305         unsigned long flags;
6306         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6307         struct ieee80211_conf *conf = NULL;
6308
6309         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6310
6311         conf = ieee80211_get_hw_conf(priv->hw);
6312
6313         if (!exit_pending)
6314                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6315
6316         iwl3945_clear_stations_table(priv);
6317
6318         /* Unblock any waiting calls */
6319         wake_up_interruptible_all(&priv->wait_command_queue);
6320
6321         /* Wipe out the EXIT_PENDING status bit if we are not actually
6322          * exiting the module */
6323         if (!exit_pending)
6324                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6325
6326         /* stop and reset the on-board processor */
6327         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6328
6329         /* tell the device to stop sending interrupts */
6330         iwl3945_disable_interrupts(priv);
6331
6332         if (priv->mac80211_registered)
6333                 ieee80211_stop_queues(priv->hw);
6334
6335         /* If we have not previously called iwl3945_init() then
6336          * clear all bits but the RF Kill and SUSPEND bits and return */
6337         if (!iwl3945_is_init(priv)) {
6338                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6339                                         STATUS_RF_KILL_HW |
6340                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6341                                         STATUS_RF_KILL_SW |
6342                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6343                                         STATUS_IN_SUSPEND;
6344                 goto exit;
6345         }
6346
6347         /* ...otherwise clear out all the status bits but the RF Kill and
6348          * SUSPEND bits and continue taking the NIC down. */
6349         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6350                                 STATUS_RF_KILL_HW |
6351                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6352                                 STATUS_RF_KILL_SW |
6353                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6354                                 STATUS_IN_SUSPEND |
6355                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6356                                 STATUS_FW_ERROR;
6357
6358         spin_lock_irqsave(&priv->lock, flags);
6359         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6360         spin_unlock_irqrestore(&priv->lock, flags);
6361
6362         iwl3945_hw_txq_ctx_stop(priv);
6363         iwl3945_hw_rxq_stop(priv);
6364
6365         spin_lock_irqsave(&priv->lock, flags);
6366         if (!iwl3945_grab_nic_access(priv)) {
6367                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
6368                                          APMG_CLK_VAL_DMA_CLK_RQT);
6369                 iwl3945_release_nic_access(priv);
6370         }
6371         spin_unlock_irqrestore(&priv->lock, flags);
6372
6373         udelay(5);
6374
6375         iwl3945_hw_nic_stop_master(priv);
6376         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6377         iwl3945_hw_nic_reset(priv);
6378
6379  exit:
6380         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
6381
6382         if (priv->ibss_beacon)
6383                 dev_kfree_skb(priv->ibss_beacon);
6384         priv->ibss_beacon = NULL;
6385
6386         /* clear out any free frames */
6387         iwl3945_clear_free_frames(priv);
6388 }
6389
6390 static void iwl3945_down(struct iwl3945_priv *priv)
6391 {
6392         mutex_lock(&priv->mutex);
6393         __iwl3945_down(priv);
6394         mutex_unlock(&priv->mutex);
6395
6396         iwl3945_cancel_deferred_work(priv);
6397 }
6398
6399 #define MAX_HW_RESTARTS 5
6400
6401 static int __iwl3945_up(struct iwl3945_priv *priv)
6402 {
6403         DECLARE_MAC_BUF(mac);
6404         int rc, i;
6405
6406         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6407                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6408                 return -EIO;
6409         }
6410
6411         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6412                 IWL_WARNING("Radio disabled by SW RF kill (module "
6413                             "parameter)\n");
6414                 return 0;
6415         }
6416
6417         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6418                 IWL_ERROR("ucode not available for device bringup\n");
6419                 return -EIO;
6420         }
6421
6422         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6423
6424         rc = iwl3945_hw_nic_init(priv);
6425         if (rc) {
6426                 IWL_ERROR("Unable to int nic\n");
6427                 return rc;
6428         }
6429
6430         /* make sure rfkill handshake bits are cleared */
6431         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6432         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6433                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6434
6435         /* clear (again), then enable host interrupts */
6436         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6437         iwl3945_enable_interrupts(priv);
6438
6439         /* really make sure rfkill handshake bits are cleared */
6440         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6441         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6442
6443         /* Copy original ucode data image from disk into backup cache.
6444          * This will be used to initialize the on-board processor's
6445          * data SRAM for a clean start when the runtime program first loads. */
6446         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6447                         priv->ucode_data.len);
6448
6449         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6450
6451                 iwl3945_clear_stations_table(priv);
6452
6453                 /* load bootstrap state machine,
6454                  * load bootstrap program into processor's memory,
6455                  * prepare to load the "initialize" uCode */
6456                 rc = iwl3945_load_bsm(priv);
6457
6458                 if (rc) {
6459                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6460                         continue;
6461                 }
6462
6463                 /* start card; "initialize" will load runtime ucode */
6464                 iwl3945_nic_start(priv);
6465
6466                 /* MAC Address location in EEPROM is same for 3945/4965 */
6467                 get_eeprom_mac(priv, priv->mac_addr);
6468                 IWL_DEBUG_INFO("MAC address: %s\n",
6469                                print_mac(mac, priv->mac_addr));
6470
6471                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6472
6473                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6474
6475                 return 0;
6476         }
6477
6478         set_bit(STATUS_EXIT_PENDING, &priv->status);
6479         __iwl3945_down(priv);
6480
6481         /* tried to restart and config the device for as long as our
6482          * patience could withstand */
6483         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6484         return -EIO;
6485 }
6486
6487
6488 /*****************************************************************************
6489  *
6490  * Workqueue callbacks
6491  *
6492  *****************************************************************************/
6493
6494 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6495 {
6496         struct iwl3945_priv *priv =
6497             container_of(data, struct iwl3945_priv, init_alive_start.work);
6498
6499         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6500                 return;
6501
6502         mutex_lock(&priv->mutex);
6503         iwl3945_init_alive_start(priv);
6504         mutex_unlock(&priv->mutex);
6505 }
6506
6507 static void iwl3945_bg_alive_start(struct work_struct *data)
6508 {
6509         struct iwl3945_priv *priv =
6510             container_of(data, struct iwl3945_priv, alive_start.work);
6511
6512         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6513                 return;
6514
6515         mutex_lock(&priv->mutex);
6516         iwl3945_alive_start(priv);
6517         mutex_unlock(&priv->mutex);
6518 }
6519
6520 static void iwl3945_bg_rf_kill(struct work_struct *work)
6521 {
6522         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6523
6524         wake_up_interruptible(&priv->wait_command_queue);
6525
6526         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6527                 return;
6528
6529         mutex_lock(&priv->mutex);
6530
6531         if (!iwl3945_is_rfkill(priv)) {
6532                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6533                           "HW and/or SW RF Kill no longer active, restarting "
6534                           "device\n");
6535                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6536                         queue_work(priv->workqueue, &priv->restart);
6537         } else {
6538
6539                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6540                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6541                                           "disabled by SW switch\n");
6542                 else
6543                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6544                                     "Kill switch must be turned off for "
6545                                     "wireless networking to work.\n");
6546         }
6547         mutex_unlock(&priv->mutex);
6548 }
6549
6550 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6551
6552 static void iwl3945_bg_scan_check(struct work_struct *data)
6553 {
6554         struct iwl3945_priv *priv =
6555             container_of(data, struct iwl3945_priv, scan_check.work);
6556
6557         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6558                 return;
6559
6560         mutex_lock(&priv->mutex);
6561         if (test_bit(STATUS_SCANNING, &priv->status) ||
6562             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6563                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6564                           "Scan completion watchdog resetting adapter (%dms)\n",
6565                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6566
6567                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6568                         iwl3945_send_scan_abort(priv);
6569         }
6570         mutex_unlock(&priv->mutex);
6571 }
6572
6573 static void iwl3945_bg_request_scan(struct work_struct *data)
6574 {
6575         struct iwl3945_priv *priv =
6576             container_of(data, struct iwl3945_priv, request_scan);
6577         struct iwl3945_host_cmd cmd = {
6578                 .id = REPLY_SCAN_CMD,
6579                 .len = sizeof(struct iwl3945_scan_cmd),
6580                 .meta.flags = CMD_SIZE_HUGE,
6581         };
6582         int rc = 0;
6583         struct iwl3945_scan_cmd *scan;
6584         struct ieee80211_conf *conf = NULL;
6585         u8 direct_mask;
6586         int phymode;
6587
6588         conf = ieee80211_get_hw_conf(priv->hw);
6589
6590         mutex_lock(&priv->mutex);
6591
6592         if (!iwl3945_is_ready(priv)) {
6593                 IWL_WARNING("request scan called when driver not ready.\n");
6594                 goto done;
6595         }
6596
6597         /* Make sure the scan wasn't cancelled before this queued work
6598          * was given the chance to run... */
6599         if (!test_bit(STATUS_SCANNING, &priv->status))
6600                 goto done;
6601
6602         /* This should never be called or scheduled if there is currently
6603          * a scan active in the hardware. */
6604         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6605                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6606                                "Ignoring second request.\n");
6607                 rc = -EIO;
6608                 goto done;
6609         }
6610
6611         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6612                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6613                 goto done;
6614         }
6615
6616         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6617                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6618                 goto done;
6619         }
6620
6621         if (iwl3945_is_rfkill(priv)) {
6622                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6623                 goto done;
6624         }
6625
6626         if (!test_bit(STATUS_READY, &priv->status)) {
6627                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6628                 goto done;
6629         }
6630
6631         if (!priv->scan_bands) {
6632                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6633                 goto done;
6634         }
6635
6636         if (!priv->scan) {
6637                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6638                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6639                 if (!priv->scan) {
6640                         rc = -ENOMEM;
6641                         goto done;
6642                 }
6643         }
6644         scan = priv->scan;
6645         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6646
6647         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6648         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6649
6650         if (iwl3945_is_associated(priv)) {
6651                 u16 interval = 0;
6652                 u32 extra;
6653                 u32 suspend_time = 100;
6654                 u32 scan_suspend_time = 100;
6655                 unsigned long flags;
6656
6657                 IWL_DEBUG_INFO("Scanning while associated...\n");
6658
6659                 spin_lock_irqsave(&priv->lock, flags);
6660                 interval = priv->beacon_int;
6661                 spin_unlock_irqrestore(&priv->lock, flags);
6662
6663                 scan->suspend_time = 0;
6664                 scan->max_out_time = cpu_to_le32(200 * 1024);
6665                 if (!interval)
6666                         interval = suspend_time;
6667                 /*
6668                  * suspend time format:
6669                  *  0-19: beacon interval in usec (time before exec.)
6670                  * 20-23: 0
6671                  * 24-31: number of beacons (suspend between channels)
6672                  */
6673
6674                 extra = (suspend_time / interval) << 24;
6675                 scan_suspend_time = 0xFF0FFFFF &
6676                     (extra | ((suspend_time % interval) * 1024));
6677
6678                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6679                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6680                                scan_suspend_time, interval);
6681         }
6682
6683         /* We should add the ability for user to lock to PASSIVE ONLY */
6684         if (priv->one_direct_scan) {
6685                 IWL_DEBUG_SCAN
6686                     ("Kicking off one direct scan for '%s'\n",
6687                      iwl3945_escape_essid(priv->direct_ssid,
6688                                       priv->direct_ssid_len));
6689                 scan->direct_scan[0].id = WLAN_EID_SSID;
6690                 scan->direct_scan[0].len = priv->direct_ssid_len;
6691                 memcpy(scan->direct_scan[0].ssid,
6692                        priv->direct_ssid, priv->direct_ssid_len);
6693                 direct_mask = 1;
6694         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6695                 scan->direct_scan[0].id = WLAN_EID_SSID;
6696                 scan->direct_scan[0].len = priv->essid_len;
6697                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6698                 direct_mask = 1;
6699         } else
6700                 direct_mask = 0;
6701
6702         /* We don't build a direct scan probe request; the uCode will do
6703          * that based on the direct_mask added to each channel entry */
6704         scan->tx_cmd.len = cpu_to_le16(
6705                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6706                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6707         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6708         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6709         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6710
6711         /* flags + rate selection */
6712
6713         switch (priv->scan_bands) {
6714         case 2:
6715                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6716                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6717                 scan->good_CRC_th = 0;
6718                 phymode = MODE_IEEE80211G;
6719                 break;
6720
6721         case 1:
6722                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6723                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6724                 phymode = MODE_IEEE80211A;
6725                 break;
6726
6727         default:
6728                 IWL_WARNING("Invalid scan band count\n");
6729                 goto done;
6730         }
6731
6732         /* select Rx antennas */
6733         scan->flags |= iwl3945_get_antenna_flags(priv);
6734
6735         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6736                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6737
6738         if (direct_mask)
6739                 IWL_DEBUG_SCAN
6740                     ("Initiating direct scan for %s.\n",
6741                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6742         else
6743                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6744
6745         scan->channel_count =
6746                 iwl3945_get_channels_for_scan(
6747                         priv, phymode, 1, /* active */
6748                         direct_mask,
6749                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6750
6751         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6752             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6753         cmd.data = scan;
6754         scan->len = cpu_to_le16(cmd.len);
6755
6756         set_bit(STATUS_SCAN_HW, &priv->status);
6757         rc = iwl3945_send_cmd_sync(priv, &cmd);
6758         if (rc)
6759                 goto done;
6760
6761         queue_delayed_work(priv->workqueue, &priv->scan_check,
6762                            IWL_SCAN_CHECK_WATCHDOG);
6763
6764         mutex_unlock(&priv->mutex);
6765         return;
6766
6767  done:
6768         /* inform mac80211 scan aborted */
6769         queue_work(priv->workqueue, &priv->scan_completed);
6770         mutex_unlock(&priv->mutex);
6771 }
6772
6773 static void iwl3945_bg_up(struct work_struct *data)
6774 {
6775         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6776
6777         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6778                 return;
6779
6780         mutex_lock(&priv->mutex);
6781         __iwl3945_up(priv);
6782         mutex_unlock(&priv->mutex);
6783 }
6784
6785 static void iwl3945_bg_restart(struct work_struct *data)
6786 {
6787         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6788
6789         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6790                 return;
6791
6792         iwl3945_down(priv);
6793         queue_work(priv->workqueue, &priv->up);
6794 }
6795
6796 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6797 {
6798         struct iwl3945_priv *priv =
6799             container_of(data, struct iwl3945_priv, rx_replenish);
6800
6801         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6802                 return;
6803
6804         mutex_lock(&priv->mutex);
6805         iwl3945_rx_replenish(priv);
6806         mutex_unlock(&priv->mutex);
6807 }
6808
6809 static void iwl3945_bg_post_associate(struct work_struct *data)
6810 {
6811         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6812                                              post_associate.work);
6813
6814         int rc = 0;
6815         struct ieee80211_conf *conf = NULL;
6816         DECLARE_MAC_BUF(mac);
6817
6818         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6819                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6820                 return;
6821         }
6822
6823
6824         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6825                         priv->assoc_id,
6826                         print_mac(mac, priv->active_rxon.bssid_addr));
6827
6828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6829                 return;
6830
6831         mutex_lock(&priv->mutex);
6832
6833         if (!priv->interface_id || !priv->is_open) {
6834                 mutex_unlock(&priv->mutex);
6835                 return;
6836         }
6837         iwl3945_scan_cancel_timeout(priv, 200);
6838
6839         conf = ieee80211_get_hw_conf(priv->hw);
6840
6841         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6842         iwl3945_commit_rxon(priv);
6843
6844         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6845         iwl3945_setup_rxon_timing(priv);
6846         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6847                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6848         if (rc)
6849                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6850                             "Attempting to continue.\n");
6851
6852         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6853
6854         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6855
6856         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6857                         priv->assoc_id, priv->beacon_int);
6858
6859         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6860                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6861         else
6862                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6863
6864         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6865                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6866                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6867                 else
6868                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6869
6870                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6871                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6872
6873         }
6874
6875         iwl3945_commit_rxon(priv);
6876
6877         switch (priv->iw_mode) {
6878         case IEEE80211_IF_TYPE_STA:
6879                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6880                 break;
6881
6882         case IEEE80211_IF_TYPE_IBSS:
6883
6884                 /* clear out the station table */
6885                 iwl3945_clear_stations_table(priv);
6886
6887                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6888                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6889                 iwl3945_sync_sta(priv, IWL_STA_ID,
6890                                  (priv->phymode == MODE_IEEE80211A)?
6891                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6892                                  CMD_ASYNC);
6893                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6894                 iwl3945_send_beacon_cmd(priv);
6895
6896                 break;
6897
6898         default:
6899                  IWL_ERROR("%s Should not be called in %d mode\n",
6900                            __FUNCTION__, priv->iw_mode);
6901                 break;
6902         }
6903
6904         iwl3945_sequence_reset(priv);
6905
6906 #ifdef CONFIG_IWL3945_QOS
6907         iwl3945_activate_qos(priv, 0);
6908 #endif /* CONFIG_IWL3945_QOS */
6909         mutex_unlock(&priv->mutex);
6910 }
6911
6912 static void iwl3945_bg_abort_scan(struct work_struct *work)
6913 {
6914         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6915
6916         if (!iwl3945_is_ready(priv))
6917                 return;
6918
6919         mutex_lock(&priv->mutex);
6920
6921         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6922         iwl3945_send_scan_abort(priv);
6923
6924         mutex_unlock(&priv->mutex);
6925 }
6926
6927 static void iwl3945_bg_scan_completed(struct work_struct *work)
6928 {
6929         struct iwl3945_priv *priv =
6930             container_of(work, struct iwl3945_priv, scan_completed);
6931
6932         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6933
6934         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6935                 return;
6936
6937         ieee80211_scan_completed(priv->hw);
6938
6939         /* Since setting the TXPOWER may have been deferred while
6940          * performing the scan, fire one off */
6941         mutex_lock(&priv->mutex);
6942         iwl3945_hw_reg_send_txpower(priv);
6943         mutex_unlock(&priv->mutex);
6944 }
6945
6946 /*****************************************************************************
6947  *
6948  * mac80211 entry point functions
6949  *
6950  *****************************************************************************/
6951
6952 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6953 {
6954         struct iwl3945_priv *priv = hw->priv;
6955
6956         IWL_DEBUG_MAC80211("enter\n");
6957
6958         /* we should be verifying the device is ready to be opened */
6959         mutex_lock(&priv->mutex);
6960
6961         priv->is_open = 1;
6962
6963         if (!iwl3945_is_rfkill(priv))
6964                 ieee80211_start_queues(priv->hw);
6965
6966         mutex_unlock(&priv->mutex);
6967         IWL_DEBUG_MAC80211("leave\n");
6968         return 0;
6969 }
6970
6971 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6972 {
6973         struct iwl3945_priv *priv = hw->priv;
6974
6975         IWL_DEBUG_MAC80211("enter\n");
6976
6977
6978         mutex_lock(&priv->mutex);
6979         /* stop mac, cancel any scan request and clear
6980          * RXON_FILTER_ASSOC_MSK BIT
6981          */
6982         priv->is_open = 0;
6983         iwl3945_scan_cancel_timeout(priv, 100);
6984         cancel_delayed_work(&priv->post_associate);
6985         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6986         iwl3945_commit_rxon(priv);
6987         mutex_unlock(&priv->mutex);
6988
6989         IWL_DEBUG_MAC80211("leave\n");
6990 }
6991
6992 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6993                       struct ieee80211_tx_control *ctl)
6994 {
6995         struct iwl3945_priv *priv = hw->priv;
6996
6997         IWL_DEBUG_MAC80211("enter\n");
6998
6999         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7000                 IWL_DEBUG_MAC80211("leave - monitor\n");
7001                 return -1;
7002         }
7003
7004         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7005                      ctl->tx_rate);
7006
7007         if (iwl3945_tx_skb(priv, skb, ctl))
7008                 dev_kfree_skb_any(skb);
7009
7010         IWL_DEBUG_MAC80211("leave\n");
7011         return 0;
7012 }
7013
7014 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
7015                                  struct ieee80211_if_init_conf *conf)
7016 {
7017         struct iwl3945_priv *priv = hw->priv;
7018         unsigned long flags;
7019         DECLARE_MAC_BUF(mac);
7020
7021         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7022
7023         if (priv->interface_id) {
7024                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7025                 return -EOPNOTSUPP;
7026         }
7027
7028         spin_lock_irqsave(&priv->lock, flags);
7029         priv->interface_id = conf->if_id;
7030
7031         spin_unlock_irqrestore(&priv->lock, flags);
7032
7033         mutex_lock(&priv->mutex);
7034
7035         if (conf->mac_addr) {
7036                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
7037                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7038         }
7039
7040         iwl3945_set_mode(priv, conf->type);
7041
7042         IWL_DEBUG_MAC80211("leave\n");
7043         mutex_unlock(&priv->mutex);
7044
7045         return 0;
7046 }
7047
7048 /**
7049  * iwl3945_mac_config - mac80211 config callback
7050  *
7051  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7052  * be set inappropriately and the driver currently sets the hardware up to
7053  * use it whenever needed.
7054  */
7055 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7056 {
7057         struct iwl3945_priv *priv = hw->priv;
7058         const struct iwl3945_channel_info *ch_info;
7059         unsigned long flags;
7060
7061         mutex_lock(&priv->mutex);
7062         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7063
7064         if (!iwl3945_is_ready(priv)) {
7065                 IWL_DEBUG_MAC80211("leave - not ready\n");
7066                 mutex_unlock(&priv->mutex);
7067                 return -EIO;
7068         }
7069
7070         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7071          * what is exposed through include/ declarations */
7072         if (unlikely(!iwl3945_param_disable_hw_scan &&
7073                      test_bit(STATUS_SCANNING, &priv->status))) {
7074                 IWL_DEBUG_MAC80211("leave - scanning\n");
7075                 mutex_unlock(&priv->mutex);
7076                 return 0;
7077         }
7078
7079         spin_lock_irqsave(&priv->lock, flags);
7080
7081         ch_info = iwl3945_get_channel_info(priv, conf->phymode, conf->channel);
7082         if (!is_channel_valid(ch_info)) {
7083                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7084                                conf->channel, conf->phymode);
7085                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7086                 spin_unlock_irqrestore(&priv->lock, flags);
7087                 mutex_unlock(&priv->mutex);
7088                 return -EINVAL;
7089         }
7090
7091         iwl3945_set_rxon_channel(priv, conf->phymode, conf->channel);
7092
7093         iwl3945_set_flags_for_phymode(priv, conf->phymode);
7094
7095         /* The list of supported rates and rate mask can be different
7096          * for each phymode; since the phymode may have changed, reset
7097          * the rate mask to what mac80211 lists */
7098         iwl3945_set_rate(priv);
7099
7100         spin_unlock_irqrestore(&priv->lock, flags);
7101
7102 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7103         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7104                 iwl3945_hw_channel_switch(priv, conf->channel);
7105                 mutex_unlock(&priv->mutex);
7106                 return 0;
7107         }
7108 #endif
7109
7110         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
7111
7112         if (!conf->radio_enabled) {
7113                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7114                 mutex_unlock(&priv->mutex);
7115                 return 0;
7116         }
7117
7118         if (iwl3945_is_rfkill(priv)) {
7119                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7120                 mutex_unlock(&priv->mutex);
7121                 return -EIO;
7122         }
7123
7124         iwl3945_set_rate(priv);
7125
7126         if (memcmp(&priv->active_rxon,
7127                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7128                 iwl3945_commit_rxon(priv);
7129         else
7130                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7131
7132         IWL_DEBUG_MAC80211("leave\n");
7133
7134         mutex_unlock(&priv->mutex);
7135
7136         return 0;
7137 }
7138
7139 static void iwl3945_config_ap(struct iwl3945_priv *priv)
7140 {
7141         int rc = 0;
7142
7143         if (priv->status & STATUS_EXIT_PENDING)
7144                 return;
7145
7146         /* The following should be done only at AP bring up */
7147         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7148
7149                 /* RXON - unassoc (to set timing command) */
7150                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7151                 iwl3945_commit_rxon(priv);
7152
7153                 /* RXON Timing */
7154                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
7155                 iwl3945_setup_rxon_timing(priv);
7156                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7157                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7158                 if (rc)
7159                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7160                                         "Attempting to continue.\n");
7161
7162                 /* FIXME: what should be the assoc_id for AP? */
7163                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7164                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7165                         priv->staging_rxon.flags |=
7166                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7167                 else
7168                         priv->staging_rxon.flags &=
7169                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7170
7171                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7172                         if (priv->assoc_capability &
7173                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7174                                 priv->staging_rxon.flags |=
7175                                         RXON_FLG_SHORT_SLOT_MSK;
7176                         else
7177                                 priv->staging_rxon.flags &=
7178                                         ~RXON_FLG_SHORT_SLOT_MSK;
7179
7180                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7181                                 priv->staging_rxon.flags &=
7182                                         ~RXON_FLG_SHORT_SLOT_MSK;
7183                 }
7184                 /* restore RXON assoc */
7185                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7186                 iwl3945_commit_rxon(priv);
7187                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
7188         }
7189         iwl3945_send_beacon_cmd(priv);
7190
7191         /* FIXME - we need to add code here to detect a totally new
7192          * configuration, reset the AP, unassoc, rxon timing, assoc,
7193          * clear sta table, add BCAST sta... */
7194 }
7195
7196 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7197                                     struct ieee80211_if_conf *conf)
7198 {
7199         struct iwl3945_priv *priv = hw->priv;
7200         DECLARE_MAC_BUF(mac);
7201         unsigned long flags;
7202         int rc;
7203
7204         if (conf == NULL)
7205                 return -EIO;
7206
7207         /* XXX: this MUST use conf->mac_addr */
7208
7209         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7210             (!conf->beacon || !conf->ssid_len)) {
7211                 IWL_DEBUG_MAC80211
7212                     ("Leaving in AP mode because HostAPD is not ready.\n");
7213                 return 0;
7214         }
7215
7216         mutex_lock(&priv->mutex);
7217
7218         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7219         if (conf->bssid)
7220                 IWL_DEBUG_MAC80211("bssid: %s\n",
7221                                    print_mac(mac, conf->bssid));
7222
7223 /*
7224  * very dubious code was here; the probe filtering flag is never set:
7225  *
7226         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7227             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7228  */
7229         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7230                 IWL_DEBUG_MAC80211("leave - scanning\n");
7231                 mutex_unlock(&priv->mutex);
7232                 return 0;
7233         }
7234
7235         if (priv->interface_id != if_id) {
7236                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7237                 mutex_unlock(&priv->mutex);
7238                 return 0;
7239         }
7240
7241         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7242                 if (!conf->bssid) {
7243                         conf->bssid = priv->mac_addr;
7244                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7245                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7246                                            print_mac(mac, conf->bssid));
7247                 }
7248                 if (priv->ibss_beacon)
7249                         dev_kfree_skb(priv->ibss_beacon);
7250
7251                 priv->ibss_beacon = conf->beacon;
7252         }
7253
7254         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7255             !is_multicast_ether_addr(conf->bssid)) {
7256                 /* If there is currently a HW scan going on in the background
7257                  * then we need to cancel it else the RXON below will fail. */
7258                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
7259                         IWL_WARNING("Aborted scan still in progress "
7260                                     "after 100ms\n");
7261                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7262                         mutex_unlock(&priv->mutex);
7263                         return -EAGAIN;
7264                 }
7265                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7266
7267                 /* TODO: Audit driver for usage of these members and see
7268                  * if mac80211 deprecates them (priv->bssid looks like it
7269                  * shouldn't be there, but I haven't scanned the IBSS code
7270                  * to verify) - jpk */
7271                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7272
7273                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7274                         iwl3945_config_ap(priv);
7275                 else {
7276                         rc = iwl3945_commit_rxon(priv);
7277                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7278                                 iwl3945_add_station(priv,
7279                                         priv->active_rxon.bssid_addr, 1, 0);
7280                 }
7281
7282         } else {
7283                 iwl3945_scan_cancel_timeout(priv, 100);
7284                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7285                 iwl3945_commit_rxon(priv);
7286         }
7287
7288         spin_lock_irqsave(&priv->lock, flags);
7289         if (!conf->ssid_len)
7290                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7291         else
7292                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7293
7294         priv->essid_len = conf->ssid_len;
7295         spin_unlock_irqrestore(&priv->lock, flags);
7296
7297         IWL_DEBUG_MAC80211("leave\n");
7298         mutex_unlock(&priv->mutex);
7299
7300         return 0;
7301 }
7302
7303 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7304                                  unsigned int changed_flags,
7305                                  unsigned int *total_flags,
7306                                  int mc_count, struct dev_addr_list *mc_list)
7307 {
7308         /*
7309          * XXX: dummy
7310          * see also iwl3945_connection_init_rx_config
7311          */
7312         *total_flags = 0;
7313 }
7314
7315 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7316                                      struct ieee80211_if_init_conf *conf)
7317 {
7318         struct iwl3945_priv *priv = hw->priv;
7319
7320         IWL_DEBUG_MAC80211("enter\n");
7321
7322         mutex_lock(&priv->mutex);
7323
7324         iwl3945_scan_cancel_timeout(priv, 100);
7325         cancel_delayed_work(&priv->post_associate);
7326         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7327         iwl3945_commit_rxon(priv);
7328
7329         if (priv->interface_id == conf->if_id) {
7330                 priv->interface_id = 0;
7331                 memset(priv->bssid, 0, ETH_ALEN);
7332                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7333                 priv->essid_len = 0;
7334         }
7335         mutex_unlock(&priv->mutex);
7336
7337         IWL_DEBUG_MAC80211("leave\n");
7338
7339 }
7340
7341 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7342 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7343 {
7344         int rc = 0;
7345         unsigned long flags;
7346         struct iwl3945_priv *priv = hw->priv;
7347
7348         IWL_DEBUG_MAC80211("enter\n");
7349
7350         mutex_lock(&priv->mutex);
7351         spin_lock_irqsave(&priv->lock, flags);
7352
7353         if (!iwl3945_is_ready_rf(priv)) {
7354                 rc = -EIO;
7355                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7356                 goto out_unlock;
7357         }
7358
7359         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7360                 rc = -EIO;
7361                 IWL_ERROR("ERROR: APs don't scan\n");
7362                 goto out_unlock;
7363         }
7364
7365         /* if we just finished scan ask for delay */
7366         if (priv->last_scan_jiffies &&
7367             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7368                        jiffies)) {
7369                 rc = -EAGAIN;
7370                 goto out_unlock;
7371         }
7372         if (len) {
7373                 IWL_DEBUG_SCAN("direct scan for  "
7374                                "%s [%d]\n ",
7375                                iwl3945_escape_essid(ssid, len), (int)len);
7376
7377                 priv->one_direct_scan = 1;
7378                 priv->direct_ssid_len = (u8)
7379                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7380                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7381         } else
7382                 priv->one_direct_scan = 0;
7383
7384         rc = iwl3945_scan_initiate(priv);
7385
7386         IWL_DEBUG_MAC80211("leave\n");
7387
7388 out_unlock:
7389         spin_unlock_irqrestore(&priv->lock, flags);
7390         mutex_unlock(&priv->mutex);
7391
7392         return rc;
7393 }
7394
7395 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7396                            const u8 *local_addr, const u8 *addr,
7397                            struct ieee80211_key_conf *key)
7398 {
7399         struct iwl3945_priv *priv = hw->priv;
7400         int rc = 0;
7401         u8 sta_id;
7402
7403         IWL_DEBUG_MAC80211("enter\n");
7404
7405         if (!iwl3945_param_hwcrypto) {
7406                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7407                 return -EOPNOTSUPP;
7408         }
7409
7410         if (is_zero_ether_addr(addr))
7411                 /* only support pairwise keys */
7412                 return -EOPNOTSUPP;
7413
7414         sta_id = iwl3945_hw_find_station(priv, addr);
7415         if (sta_id == IWL_INVALID_STATION) {
7416                 DECLARE_MAC_BUF(mac);
7417
7418                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7419                                    print_mac(mac, addr));
7420                 return -EINVAL;
7421         }
7422
7423         mutex_lock(&priv->mutex);
7424
7425         iwl3945_scan_cancel_timeout(priv, 100);
7426
7427         switch (cmd) {
7428         case  SET_KEY:
7429                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7430                 if (!rc) {
7431                         iwl3945_set_rxon_hwcrypto(priv, 1);
7432                         iwl3945_commit_rxon(priv);
7433                         key->hw_key_idx = sta_id;
7434                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7435                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7436                 }
7437                 break;
7438         case DISABLE_KEY:
7439                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7440                 if (!rc) {
7441                         iwl3945_set_rxon_hwcrypto(priv, 0);
7442                         iwl3945_commit_rxon(priv);
7443                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7444                 }
7445                 break;
7446         default:
7447                 rc = -EINVAL;
7448         }
7449
7450         IWL_DEBUG_MAC80211("leave\n");
7451         mutex_unlock(&priv->mutex);
7452
7453         return rc;
7454 }
7455
7456 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7457                            const struct ieee80211_tx_queue_params *params)
7458 {
7459         struct iwl3945_priv *priv = hw->priv;
7460 #ifdef CONFIG_IWL3945_QOS
7461         unsigned long flags;
7462         int q;
7463 #endif /* CONFIG_IWL3945_QOS */
7464
7465         IWL_DEBUG_MAC80211("enter\n");
7466
7467         if (!iwl3945_is_ready_rf(priv)) {
7468                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7469                 return -EIO;
7470         }
7471
7472         if (queue >= AC_NUM) {
7473                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7474                 return 0;
7475         }
7476
7477 #ifdef CONFIG_IWL3945_QOS
7478         if (!priv->qos_data.qos_enable) {
7479                 priv->qos_data.qos_active = 0;
7480                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7481                 return 0;
7482         }
7483         q = AC_NUM - 1 - queue;
7484
7485         spin_lock_irqsave(&priv->lock, flags);
7486
7487         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7488         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7489         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7490         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7491                         cpu_to_le16((params->burst_time * 100));
7492
7493         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7494         priv->qos_data.qos_active = 1;
7495
7496         spin_unlock_irqrestore(&priv->lock, flags);
7497
7498         mutex_lock(&priv->mutex);
7499         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7500                 iwl3945_activate_qos(priv, 1);
7501         else if (priv->assoc_id && iwl3945_is_associated(priv))
7502                 iwl3945_activate_qos(priv, 0);
7503
7504         mutex_unlock(&priv->mutex);
7505
7506 #endif /*CONFIG_IWL3945_QOS */
7507
7508         IWL_DEBUG_MAC80211("leave\n");
7509         return 0;
7510 }
7511
7512 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7513                                 struct ieee80211_tx_queue_stats *stats)
7514 {
7515         struct iwl3945_priv *priv = hw->priv;
7516         int i, avail;
7517         struct iwl3945_tx_queue *txq;
7518         struct iwl3945_queue *q;
7519         unsigned long flags;
7520
7521         IWL_DEBUG_MAC80211("enter\n");
7522
7523         if (!iwl3945_is_ready_rf(priv)) {
7524                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7525                 return -EIO;
7526         }
7527
7528         spin_lock_irqsave(&priv->lock, flags);
7529
7530         for (i = 0; i < AC_NUM; i++) {
7531                 txq = &priv->txq[i];
7532                 q = &txq->q;
7533                 avail = iwl3945_queue_space(q);
7534
7535                 stats->data[i].len = q->n_window - avail;
7536                 stats->data[i].limit = q->n_window - q->high_mark;
7537                 stats->data[i].count = q->n_window;
7538
7539         }
7540         spin_unlock_irqrestore(&priv->lock, flags);
7541
7542         IWL_DEBUG_MAC80211("leave\n");
7543
7544         return 0;
7545 }
7546
7547 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7548                              struct ieee80211_low_level_stats *stats)
7549 {
7550         IWL_DEBUG_MAC80211("enter\n");
7551         IWL_DEBUG_MAC80211("leave\n");
7552
7553         return 0;
7554 }
7555
7556 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7557 {
7558         IWL_DEBUG_MAC80211("enter\n");
7559         IWL_DEBUG_MAC80211("leave\n");
7560
7561         return 0;
7562 }
7563
7564 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7565 {
7566         struct iwl3945_priv *priv = hw->priv;
7567         unsigned long flags;
7568
7569         mutex_lock(&priv->mutex);
7570         IWL_DEBUG_MAC80211("enter\n");
7571
7572 #ifdef CONFIG_IWL3945_QOS
7573         iwl3945_reset_qos(priv);
7574 #endif
7575         cancel_delayed_work(&priv->post_associate);
7576
7577         spin_lock_irqsave(&priv->lock, flags);
7578         priv->assoc_id = 0;
7579         priv->assoc_capability = 0;
7580         priv->call_post_assoc_from_beacon = 0;
7581
7582         /* new association get rid of ibss beacon skb */
7583         if (priv->ibss_beacon)
7584                 dev_kfree_skb(priv->ibss_beacon);
7585
7586         priv->ibss_beacon = NULL;
7587
7588         priv->beacon_int = priv->hw->conf.beacon_int;
7589         priv->timestamp1 = 0;
7590         priv->timestamp0 = 0;
7591         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7592                 priv->beacon_int = 0;
7593
7594         spin_unlock_irqrestore(&priv->lock, flags);
7595
7596         /* we are restarting association process
7597          * clear RXON_FILTER_ASSOC_MSK bit
7598         */
7599         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7600                 iwl3945_scan_cancel_timeout(priv, 100);
7601                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7602                 iwl3945_commit_rxon(priv);
7603         }
7604
7605         /* Per mac80211.h: This is only used in IBSS mode... */
7606         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7607
7608                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7609                 mutex_unlock(&priv->mutex);
7610                 return;
7611         }
7612
7613         if (!iwl3945_is_ready_rf(priv)) {
7614                 IWL_DEBUG_MAC80211("leave - not ready\n");
7615                 mutex_unlock(&priv->mutex);
7616                 return;
7617         }
7618
7619         priv->only_active_channel = 0;
7620
7621         iwl3945_set_rate(priv);
7622
7623         mutex_unlock(&priv->mutex);
7624
7625         IWL_DEBUG_MAC80211("leave\n");
7626
7627 }
7628
7629 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7630                                  struct ieee80211_tx_control *control)
7631 {
7632         struct iwl3945_priv *priv = hw->priv;
7633         unsigned long flags;
7634
7635         mutex_lock(&priv->mutex);
7636         IWL_DEBUG_MAC80211("enter\n");
7637
7638         if (!iwl3945_is_ready_rf(priv)) {
7639                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7640                 mutex_unlock(&priv->mutex);
7641                 return -EIO;
7642         }
7643
7644         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7645                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7646                 mutex_unlock(&priv->mutex);
7647                 return -EIO;
7648         }
7649
7650         spin_lock_irqsave(&priv->lock, flags);
7651
7652         if (priv->ibss_beacon)
7653                 dev_kfree_skb(priv->ibss_beacon);
7654
7655         priv->ibss_beacon = skb;
7656
7657         priv->assoc_id = 0;
7658
7659         IWL_DEBUG_MAC80211("leave\n");
7660         spin_unlock_irqrestore(&priv->lock, flags);
7661
7662 #ifdef CONFIG_IWL3945_QOS
7663         iwl3945_reset_qos(priv);
7664 #endif
7665
7666         queue_work(priv->workqueue, &priv->post_associate.work);
7667
7668         mutex_unlock(&priv->mutex);
7669
7670         return 0;
7671 }
7672
7673 /*****************************************************************************
7674  *
7675  * sysfs attributes
7676  *
7677  *****************************************************************************/
7678
7679 #ifdef CONFIG_IWL3945_DEBUG
7680
7681 /*
7682  * The following adds a new attribute to the sysfs representation
7683  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7684  * used for controlling the debug level.
7685  *
7686  * See the level definitions in iwl for details.
7687  */
7688
7689 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7690 {
7691         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7692 }
7693 static ssize_t store_debug_level(struct device_driver *d,
7694                                  const char *buf, size_t count)
7695 {
7696         char *p = (char *)buf;
7697         u32 val;
7698
7699         val = simple_strtoul(p, &p, 0);
7700         if (p == buf)
7701                 printk(KERN_INFO DRV_NAME
7702                        ": %s is not in hex or decimal form.\n", buf);
7703         else
7704                 iwl3945_debug_level = val;
7705
7706         return strnlen(buf, count);
7707 }
7708
7709 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7710                    show_debug_level, store_debug_level);
7711
7712 #endif /* CONFIG_IWL3945_DEBUG */
7713
7714 static ssize_t show_rf_kill(struct device *d,
7715                             struct device_attribute *attr, char *buf)
7716 {
7717         /*
7718          * 0 - RF kill not enabled
7719          * 1 - SW based RF kill active (sysfs)
7720          * 2 - HW based RF kill active
7721          * 3 - Both HW and SW based RF kill active
7722          */
7723         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7724         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7725                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7726
7727         return sprintf(buf, "%i\n", val);
7728 }
7729
7730 static ssize_t store_rf_kill(struct device *d,
7731                              struct device_attribute *attr,
7732                              const char *buf, size_t count)
7733 {
7734         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7735
7736         mutex_lock(&priv->mutex);
7737         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7738         mutex_unlock(&priv->mutex);
7739
7740         return count;
7741 }
7742
7743 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7744
7745 static ssize_t show_temperature(struct device *d,
7746                                 struct device_attribute *attr, char *buf)
7747 {
7748         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7749
7750         if (!iwl3945_is_alive(priv))
7751                 return -EAGAIN;
7752
7753         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7754 }
7755
7756 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7757
7758 static ssize_t show_rs_window(struct device *d,
7759                               struct device_attribute *attr,
7760                               char *buf)
7761 {
7762         struct iwl3945_priv *priv = d->driver_data;
7763         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7764 }
7765 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7766
7767 static ssize_t show_tx_power(struct device *d,
7768                              struct device_attribute *attr, char *buf)
7769 {
7770         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7771         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7772 }
7773
7774 static ssize_t store_tx_power(struct device *d,
7775                               struct device_attribute *attr,
7776                               const char *buf, size_t count)
7777 {
7778         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7779         char *p = (char *)buf;
7780         u32 val;
7781
7782         val = simple_strtoul(p, &p, 10);
7783         if (p == buf)
7784                 printk(KERN_INFO DRV_NAME
7785                        ": %s is not in decimal form.\n", buf);
7786         else
7787                 iwl3945_hw_reg_set_txpower(priv, val);
7788
7789         return count;
7790 }
7791
7792 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7793
7794 static ssize_t show_flags(struct device *d,
7795                           struct device_attribute *attr, char *buf)
7796 {
7797         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7798
7799         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7800 }
7801
7802 static ssize_t store_flags(struct device *d,
7803                            struct device_attribute *attr,
7804                            const char *buf, size_t count)
7805 {
7806         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7807         u32 flags = simple_strtoul(buf, NULL, 0);
7808
7809         mutex_lock(&priv->mutex);
7810         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7811                 /* Cancel any currently running scans... */
7812                 if (iwl3945_scan_cancel_timeout(priv, 100))
7813                         IWL_WARNING("Could not cancel scan.\n");
7814                 else {
7815                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7816                                        flags);
7817                         priv->staging_rxon.flags = cpu_to_le32(flags);
7818                         iwl3945_commit_rxon(priv);
7819                 }
7820         }
7821         mutex_unlock(&priv->mutex);
7822
7823         return count;
7824 }
7825
7826 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7827
7828 static ssize_t show_filter_flags(struct device *d,
7829                                  struct device_attribute *attr, char *buf)
7830 {
7831         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7832
7833         return sprintf(buf, "0x%04X\n",
7834                 le32_to_cpu(priv->active_rxon.filter_flags));
7835 }
7836
7837 static ssize_t store_filter_flags(struct device *d,
7838                                   struct device_attribute *attr,
7839                                   const char *buf, size_t count)
7840 {
7841         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7842         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7843
7844         mutex_lock(&priv->mutex);
7845         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7846                 /* Cancel any currently running scans... */
7847                 if (iwl3945_scan_cancel_timeout(priv, 100))
7848                         IWL_WARNING("Could not cancel scan.\n");
7849                 else {
7850                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7851                                        "0x%04X\n", filter_flags);
7852                         priv->staging_rxon.filter_flags =
7853                                 cpu_to_le32(filter_flags);
7854                         iwl3945_commit_rxon(priv);
7855                 }
7856         }
7857         mutex_unlock(&priv->mutex);
7858
7859         return count;
7860 }
7861
7862 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7863                    store_filter_flags);
7864
7865 static ssize_t show_tune(struct device *d,
7866                          struct device_attribute *attr, char *buf)
7867 {
7868         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7869
7870         return sprintf(buf, "0x%04X\n",
7871                        (priv->phymode << 8) |
7872                         le16_to_cpu(priv->active_rxon.channel));
7873 }
7874
7875 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv, u8 phymode);
7876
7877 static ssize_t store_tune(struct device *d,
7878                           struct device_attribute *attr,
7879                           const char *buf, size_t count)
7880 {
7881         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7882         char *p = (char *)buf;
7883         u16 tune = simple_strtoul(p, &p, 0);
7884         u8 phymode = (tune >> 8) & 0xff;
7885         u16 channel = tune & 0xff;
7886
7887         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7888
7889         mutex_lock(&priv->mutex);
7890         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7891             (priv->phymode != phymode)) {
7892                 const struct iwl3945_channel_info *ch_info;
7893
7894                 ch_info = iwl3945_get_channel_info(priv, phymode, channel);
7895                 if (!ch_info) {
7896                         IWL_WARNING("Requested invalid phymode/channel "
7897                                     "combination: %d %d\n", phymode, channel);
7898                         mutex_unlock(&priv->mutex);
7899                         return -EINVAL;
7900                 }
7901
7902                 /* Cancel any currently running scans... */
7903                 if (iwl3945_scan_cancel_timeout(priv, 100))
7904                         IWL_WARNING("Could not cancel scan.\n");
7905                 else {
7906                         IWL_DEBUG_INFO("Committing phymode and "
7907                                        "rxon.channel = %d %d\n",
7908                                        phymode, channel);
7909
7910                         iwl3945_set_rxon_channel(priv, phymode, channel);
7911                         iwl3945_set_flags_for_phymode(priv, phymode);
7912
7913                         iwl3945_set_rate(priv);
7914                         iwl3945_commit_rxon(priv);
7915                 }
7916         }
7917         mutex_unlock(&priv->mutex);
7918
7919         return count;
7920 }
7921
7922 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7923
7924 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7925
7926 static ssize_t show_measurement(struct device *d,
7927                                 struct device_attribute *attr, char *buf)
7928 {
7929         struct iwl3945_priv *priv = dev_get_drvdata(d);
7930         struct iwl3945_spectrum_notification measure_report;
7931         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7932         u8 *data = (u8 *) & measure_report;
7933         unsigned long flags;
7934
7935         spin_lock_irqsave(&priv->lock, flags);
7936         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7937                 spin_unlock_irqrestore(&priv->lock, flags);
7938                 return 0;
7939         }
7940         memcpy(&measure_report, &priv->measure_report, size);
7941         priv->measurement_status = 0;
7942         spin_unlock_irqrestore(&priv->lock, flags);
7943
7944         while (size && (PAGE_SIZE - len)) {
7945                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7946                                    PAGE_SIZE - len, 1);
7947                 len = strlen(buf);
7948                 if (PAGE_SIZE - len)
7949                         buf[len++] = '\n';
7950
7951                 ofs += 16;
7952                 size -= min(size, 16U);
7953         }
7954
7955         return len;
7956 }
7957
7958 static ssize_t store_measurement(struct device *d,
7959                                  struct device_attribute *attr,
7960                                  const char *buf, size_t count)
7961 {
7962         struct iwl3945_priv *priv = dev_get_drvdata(d);
7963         struct ieee80211_measurement_params params = {
7964                 .channel = le16_to_cpu(priv->active_rxon.channel),
7965                 .start_time = cpu_to_le64(priv->last_tsf),
7966                 .duration = cpu_to_le16(1),
7967         };
7968         u8 type = IWL_MEASURE_BASIC;
7969         u8 buffer[32];
7970         u8 channel;
7971
7972         if (count) {
7973                 char *p = buffer;
7974                 strncpy(buffer, buf, min(sizeof(buffer), count));
7975                 channel = simple_strtoul(p, NULL, 0);
7976                 if (channel)
7977                         params.channel = channel;
7978
7979                 p = buffer;
7980                 while (*p && *p != ' ')
7981                         p++;
7982                 if (*p)
7983                         type = simple_strtoul(p + 1, NULL, 0);
7984         }
7985
7986         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7987                        "channel %d (for '%s')\n", type, params.channel, buf);
7988         iwl3945_get_measurement(priv, &params, type);
7989
7990         return count;
7991 }
7992
7993 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7994                    show_measurement, store_measurement);
7995 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7996
7997 static ssize_t show_rate(struct device *d,
7998                          struct device_attribute *attr, char *buf)
7999 {
8000         struct iwl3945_priv *priv = dev_get_drvdata(d);
8001         unsigned long flags;
8002         int i;
8003
8004         spin_lock_irqsave(&priv->sta_lock, flags);
8005         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
8006                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
8007         else
8008                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
8009         spin_unlock_irqrestore(&priv->sta_lock, flags);
8010
8011         i = iwl3945_rate_index_from_plcp(i);
8012         if (i == -1)
8013                 return sprintf(buf, "0\n");
8014
8015         return sprintf(buf, "%d%s\n",
8016                        (iwl3945_rates[i].ieee >> 1),
8017                        (iwl3945_rates[i].ieee & 0x1) ? ".5" : "");
8018 }
8019
8020 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
8021
8022 static ssize_t store_retry_rate(struct device *d,
8023                                 struct device_attribute *attr,
8024                                 const char *buf, size_t count)
8025 {
8026         struct iwl3945_priv *priv = dev_get_drvdata(d);
8027
8028         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8029         if (priv->retry_rate <= 0)
8030                 priv->retry_rate = 1;
8031
8032         return count;
8033 }
8034
8035 static ssize_t show_retry_rate(struct device *d,
8036                                struct device_attribute *attr, char *buf)
8037 {
8038         struct iwl3945_priv *priv = dev_get_drvdata(d);
8039         return sprintf(buf, "%d", priv->retry_rate);
8040 }
8041
8042 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8043                    store_retry_rate);
8044
8045 static ssize_t store_power_level(struct device *d,
8046                                  struct device_attribute *attr,
8047                                  const char *buf, size_t count)
8048 {
8049         struct iwl3945_priv *priv = dev_get_drvdata(d);
8050         int rc;
8051         int mode;
8052
8053         mode = simple_strtoul(buf, NULL, 0);
8054         mutex_lock(&priv->mutex);
8055
8056         if (!iwl3945_is_ready(priv)) {
8057                 rc = -EAGAIN;
8058                 goto out;
8059         }
8060
8061         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8062                 mode = IWL_POWER_AC;
8063         else
8064                 mode |= IWL_POWER_ENABLED;
8065
8066         if (mode != priv->power_mode) {
8067                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8068                 if (rc) {
8069                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8070                         goto out;
8071                 }
8072                 priv->power_mode = mode;
8073         }
8074
8075         rc = count;
8076
8077  out:
8078         mutex_unlock(&priv->mutex);
8079         return rc;
8080 }
8081
8082 #define MAX_WX_STRING 80
8083
8084 /* Values are in microsecond */
8085 static const s32 timeout_duration[] = {
8086         350000,
8087         250000,
8088         75000,
8089         37000,
8090         25000,
8091 };
8092 static const s32 period_duration[] = {
8093         400000,
8094         700000,
8095         1000000,
8096         1000000,
8097         1000000
8098 };
8099
8100 static ssize_t show_power_level(struct device *d,
8101                                 struct device_attribute *attr, char *buf)
8102 {
8103         struct iwl3945_priv *priv = dev_get_drvdata(d);
8104         int level = IWL_POWER_LEVEL(priv->power_mode);
8105         char *p = buf;
8106
8107         p += sprintf(p, "%d ", level);
8108         switch (level) {
8109         case IWL_POWER_MODE_CAM:
8110         case IWL_POWER_AC:
8111                 p += sprintf(p, "(AC)");
8112                 break;
8113         case IWL_POWER_BATTERY:
8114                 p += sprintf(p, "(BATTERY)");
8115                 break;
8116         default:
8117                 p += sprintf(p,
8118                              "(Timeout %dms, Period %dms)",
8119                              timeout_duration[level - 1] / 1000,
8120                              period_duration[level - 1] / 1000);
8121         }
8122
8123         if (!(priv->power_mode & IWL_POWER_ENABLED))
8124                 p += sprintf(p, " OFF\n");
8125         else
8126                 p += sprintf(p, " \n");
8127
8128         return (p - buf + 1);
8129
8130 }
8131
8132 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8133                    store_power_level);
8134
8135 static ssize_t show_channels(struct device *d,
8136                              struct device_attribute *attr, char *buf)
8137 {
8138         struct iwl3945_priv *priv = dev_get_drvdata(d);
8139         int len = 0, i;
8140         struct ieee80211_channel *channels = NULL;
8141         const struct ieee80211_hw_mode *hw_mode = NULL;
8142         int count = 0;
8143
8144         if (!iwl3945_is_ready(priv))
8145                 return -EAGAIN;
8146
8147         hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211G);
8148         if (!hw_mode)
8149                 hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211B);
8150         if (hw_mode) {
8151                 channels = hw_mode->channels;
8152                 count = hw_mode->num_channels;
8153         }
8154
8155         len +=
8156             sprintf(&buf[len],
8157                     "Displaying %d channels in 2.4GHz band "
8158                     "(802.11bg):\n", count);
8159
8160         for (i = 0; i < count; i++)
8161                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8162                                channels[i].chan,
8163                                channels[i].power_level,
8164                                channels[i].
8165                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8166                                " (IEEE 802.11h required)" : "",
8167                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8168                                 || (channels[i].
8169                                     flag &
8170                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8171                                ", IBSS",
8172                                channels[i].
8173                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8174                                "active/passive" : "passive only");
8175
8176         hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211A);
8177         if (hw_mode) {
8178                 channels = hw_mode->channels;
8179                 count = hw_mode->num_channels;
8180         } else {
8181                 channels = NULL;
8182                 count = 0;
8183         }
8184
8185         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8186                        "(802.11a):\n", count);
8187
8188         for (i = 0; i < count; i++)
8189                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8190                                channels[i].chan,
8191                                channels[i].power_level,
8192                                channels[i].
8193                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8194                                " (IEEE 802.11h required)" : "",
8195                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8196                                 || (channels[i].
8197                                     flag &
8198                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8199                                ", IBSS",
8200                                channels[i].
8201                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8202                                "active/passive" : "passive only");
8203
8204         return len;
8205 }
8206
8207 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8208
8209 static ssize_t show_statistics(struct device *d,
8210                                struct device_attribute *attr, char *buf)
8211 {
8212         struct iwl3945_priv *priv = dev_get_drvdata(d);
8213         u32 size = sizeof(struct iwl3945_notif_statistics);
8214         u32 len = 0, ofs = 0;
8215         u8 *data = (u8 *) & priv->statistics;
8216         int rc = 0;
8217
8218         if (!iwl3945_is_alive(priv))
8219                 return -EAGAIN;
8220
8221         mutex_lock(&priv->mutex);
8222         rc = iwl3945_send_statistics_request(priv);
8223         mutex_unlock(&priv->mutex);
8224
8225         if (rc) {
8226                 len = sprintf(buf,
8227                               "Error sending statistics request: 0x%08X\n", rc);
8228                 return len;
8229         }
8230
8231         while (size && (PAGE_SIZE - len)) {
8232                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8233                                    PAGE_SIZE - len, 1);
8234                 len = strlen(buf);
8235                 if (PAGE_SIZE - len)
8236                         buf[len++] = '\n';
8237
8238                 ofs += 16;
8239                 size -= min(size, 16U);
8240         }
8241
8242         return len;
8243 }
8244
8245 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8246
8247 static ssize_t show_antenna(struct device *d,
8248                             struct device_attribute *attr, char *buf)
8249 {
8250         struct iwl3945_priv *priv = dev_get_drvdata(d);
8251
8252         if (!iwl3945_is_alive(priv))
8253                 return -EAGAIN;
8254
8255         return sprintf(buf, "%d\n", priv->antenna);
8256 }
8257
8258 static ssize_t store_antenna(struct device *d,
8259                              struct device_attribute *attr,
8260                              const char *buf, size_t count)
8261 {
8262         int ant;
8263         struct iwl3945_priv *priv = dev_get_drvdata(d);
8264
8265         if (count == 0)
8266                 return 0;
8267
8268         if (sscanf(buf, "%1i", &ant) != 1) {
8269                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8270                 return count;
8271         }
8272
8273         if ((ant >= 0) && (ant <= 2)) {
8274                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8275                 priv->antenna = (enum iwl3945_antenna)ant;
8276         } else
8277                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8278
8279
8280         return count;
8281 }
8282
8283 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8284
8285 static ssize_t show_status(struct device *d,
8286                            struct device_attribute *attr, char *buf)
8287 {
8288         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
8289         if (!iwl3945_is_alive(priv))
8290                 return -EAGAIN;
8291         return sprintf(buf, "0x%08x\n", (int)priv->status);
8292 }
8293
8294 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8295
8296 static ssize_t dump_error_log(struct device *d,
8297                               struct device_attribute *attr,
8298                               const char *buf, size_t count)
8299 {
8300         char *p = (char *)buf;
8301
8302         if (p[0] == '1')
8303                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
8304
8305         return strnlen(buf, count);
8306 }
8307
8308 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8309
8310 static ssize_t dump_event_log(struct device *d,
8311                               struct device_attribute *attr,
8312                               const char *buf, size_t count)
8313 {
8314         char *p = (char *)buf;
8315
8316         if (p[0] == '1')
8317                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
8318
8319         return strnlen(buf, count);
8320 }
8321
8322 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8323
8324 /*****************************************************************************
8325  *
8326  * driver setup and teardown
8327  *
8328  *****************************************************************************/
8329
8330 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
8331 {
8332         priv->workqueue = create_workqueue(DRV_NAME);
8333
8334         init_waitqueue_head(&priv->wait_command_queue);
8335
8336         INIT_WORK(&priv->up, iwl3945_bg_up);
8337         INIT_WORK(&priv->restart, iwl3945_bg_restart);
8338         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
8339         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
8340         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
8341         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
8342         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
8343         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
8344         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
8345         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
8346         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
8347         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
8348
8349         iwl3945_hw_setup_deferred_work(priv);
8350
8351         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8352                      iwl3945_irq_tasklet, (unsigned long)priv);
8353 }
8354
8355 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
8356 {
8357         iwl3945_hw_cancel_deferred_work(priv);
8358
8359         cancel_delayed_work_sync(&priv->init_alive_start);
8360         cancel_delayed_work(&priv->scan_check);
8361         cancel_delayed_work(&priv->alive_start);
8362         cancel_delayed_work(&priv->post_associate);
8363         cancel_work_sync(&priv->beacon_update);
8364 }
8365
8366 static struct attribute *iwl3945_sysfs_entries[] = {
8367         &dev_attr_antenna.attr,
8368         &dev_attr_channels.attr,
8369         &dev_attr_dump_errors.attr,
8370         &dev_attr_dump_events.attr,
8371         &dev_attr_flags.attr,
8372         &dev_attr_filter_flags.attr,
8373 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
8374         &dev_attr_measurement.attr,
8375 #endif
8376         &dev_attr_power_level.attr,
8377         &dev_attr_rate.attr,
8378         &dev_attr_retry_rate.attr,
8379         &dev_attr_rf_kill.attr,
8380         &dev_attr_rs_window.attr,
8381         &dev_attr_statistics.attr,
8382         &dev_attr_status.attr,
8383         &dev_attr_temperature.attr,
8384         &dev_attr_tune.attr,
8385         &dev_attr_tx_power.attr,
8386
8387         NULL
8388 };
8389
8390 static struct attribute_group iwl3945_attribute_group = {
8391         .name = NULL,           /* put in device directory */
8392         .attrs = iwl3945_sysfs_entries,
8393 };
8394
8395 static struct ieee80211_ops iwl3945_hw_ops = {
8396         .tx = iwl3945_mac_tx,
8397         .start = iwl3945_mac_start,
8398         .stop = iwl3945_mac_stop,
8399         .add_interface = iwl3945_mac_add_interface,
8400         .remove_interface = iwl3945_mac_remove_interface,
8401         .config = iwl3945_mac_config,
8402         .config_interface = iwl3945_mac_config_interface,
8403         .configure_filter = iwl3945_configure_filter,
8404         .set_key = iwl3945_mac_set_key,
8405         .get_stats = iwl3945_mac_get_stats,
8406         .get_tx_stats = iwl3945_mac_get_tx_stats,
8407         .conf_tx = iwl3945_mac_conf_tx,
8408         .get_tsf = iwl3945_mac_get_tsf,
8409         .reset_tsf = iwl3945_mac_reset_tsf,
8410         .beacon_update = iwl3945_mac_beacon_update,
8411         .hw_scan = iwl3945_mac_hw_scan
8412 };
8413
8414 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8415 {
8416         int err = 0;
8417         u32 pci_id;
8418         struct iwl3945_priv *priv;
8419         struct ieee80211_hw *hw;
8420         int i;
8421
8422         /* Disabling hardware scan means that mac80211 will perform scans
8423          * "the hard way", rather than using device's scan. */
8424         if (iwl3945_param_disable_hw_scan) {
8425                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8426                 iwl3945_hw_ops.hw_scan = NULL;
8427         }
8428
8429         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8430             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8431                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8432                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8433                 err = -EINVAL;
8434                 goto out;
8435         }
8436
8437         /* mac80211 allocates memory for this device instance, including
8438          *   space for this driver's private structure */
8439         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
8440         if (hw == NULL) {
8441                 IWL_ERROR("Can not allocate network device\n");
8442                 err = -ENOMEM;
8443                 goto out;
8444         }
8445         SET_IEEE80211_DEV(hw, &pdev->dev);
8446
8447         hw->rate_control_algorithm = "iwl-3945-rs";
8448
8449         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8450         priv = hw->priv;
8451         priv->hw = hw;
8452
8453         priv->pci_dev = pdev;
8454
8455         /* Select antenna (may be helpful if only one antenna is connected) */
8456         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8457 #ifdef CONFIG_IWL3945_DEBUG
8458         iwl3945_debug_level = iwl3945_param_debug;
8459         atomic_set(&priv->restrict_refcnt, 0);
8460 #endif
8461         priv->retry_rate = 1;
8462
8463         priv->ibss_beacon = NULL;
8464
8465         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8466          *   the range of signal quality values that we'll provide.
8467          * Negative values for level/noise indicate that we'll provide dBm.
8468          * For WE, at least, non-0 values here *enable* display of values
8469          *   in app (iwconfig). */
8470         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8471         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8472         hw->max_signal = 100;   /* link quality indication (%) */
8473
8474         /* Tell mac80211 our Tx characteristics */
8475         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8476
8477         /* 4 EDCA QOS priorities */
8478         hw->queues = 4;
8479
8480         spin_lock_init(&priv->lock);
8481         spin_lock_init(&priv->power_data.lock);
8482         spin_lock_init(&priv->sta_lock);
8483         spin_lock_init(&priv->hcmd_lock);
8484
8485         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8486                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8487
8488         INIT_LIST_HEAD(&priv->free_frames);
8489
8490         mutex_init(&priv->mutex);
8491         if (pci_enable_device(pdev)) {
8492                 err = -ENODEV;
8493                 goto out_ieee80211_free_hw;
8494         }
8495
8496         pci_set_master(pdev);
8497
8498         /* Clear the driver's (not device's) station table */
8499         iwl3945_clear_stations_table(priv);
8500
8501         priv->data_retry_limit = -1;
8502         priv->ieee_channels = NULL;
8503         priv->ieee_rates = NULL;
8504         priv->phymode = -1;
8505
8506         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8507         if (!err)
8508                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8509         if (err) {
8510                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8511                 goto out_pci_disable_device;
8512         }
8513
8514         pci_set_drvdata(pdev, priv);
8515         err = pci_request_regions(pdev, DRV_NAME);
8516         if (err)
8517                 goto out_pci_disable_device;
8518
8519         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8520          * PCI Tx retries from interfering with C3 CPU state */
8521         pci_write_config_byte(pdev, 0x41, 0x00);
8522
8523         priv->hw_base = pci_iomap(pdev, 0, 0);
8524         if (!priv->hw_base) {
8525                 err = -ENODEV;
8526                 goto out_pci_release_regions;
8527         }
8528
8529         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8530                         (unsigned long long) pci_resource_len(pdev, 0));
8531         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8532
8533         /* Initialize module parameter values here */
8534
8535         /* Disable radio (SW RF KILL) via parameter when loading driver */
8536         if (iwl3945_param_disable) {
8537                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8538                 IWL_DEBUG_INFO("Radio disabled.\n");
8539         }
8540
8541         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8542
8543         pci_id =
8544             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8545
8546         switch (pci_id) {
8547         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8548         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8549         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8550         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8551                 priv->is_abg = 0;
8552                 break;
8553
8554         /*
8555          * Rest are assumed ABG SKU -- if this is not the
8556          * case then the card will get the wrong 'Detected'
8557          * line in the kernel log however the code that
8558          * initializes the GEO table will detect no A-band
8559          * channels and remove the is_abg mask.
8560          */
8561         default:
8562                 priv->is_abg = 1;
8563                 break;
8564         }
8565
8566         printk(KERN_INFO DRV_NAME
8567                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8568                priv->is_abg ? "A" : "");
8569
8570         /* Device-specific setup */
8571         if (iwl3945_hw_set_hw_setting(priv)) {
8572                 IWL_ERROR("failed to set hw settings\n");
8573                 mutex_unlock(&priv->mutex);
8574                 goto out_iounmap;
8575         }
8576
8577 #ifdef CONFIG_IWL3945_QOS
8578         if (iwl3945_param_qos_enable)
8579                 priv->qos_data.qos_enable = 1;
8580
8581         iwl3945_reset_qos(priv);
8582
8583         priv->qos_data.qos_active = 0;
8584         priv->qos_data.qos_cap.val = 0;
8585 #endif /* CONFIG_IWL3945_QOS */
8586
8587         iwl3945_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8588         iwl3945_setup_deferred_work(priv);
8589         iwl3945_setup_rx_handlers(priv);
8590
8591         priv->rates_mask = IWL_RATES_MASK;
8592         /* If power management is turned on, default to AC mode */
8593         priv->power_mode = IWL_POWER_AC;
8594         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8595
8596         iwl3945_disable_interrupts(priv);
8597
8598         pci_enable_msi(pdev);
8599
8600         err = request_irq(pdev->irq, iwl3945_isr, IRQF_SHARED, DRV_NAME, priv);
8601         if (err) {
8602                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8603                 goto out_disable_msi;
8604         }
8605
8606         mutex_lock(&priv->mutex);
8607
8608         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8609         if (err) {
8610                 IWL_ERROR("failed to create sysfs device attributes\n");
8611                 mutex_unlock(&priv->mutex);
8612                 goto out_release_irq;
8613         }
8614
8615         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8616          * ucode filename and max sizes are card-specific. */
8617         err = iwl3945_read_ucode(priv);
8618         if (err) {
8619                 IWL_ERROR("Could not read microcode: %d\n", err);
8620                 mutex_unlock(&priv->mutex);
8621                 goto out_pci_alloc;
8622         }
8623
8624         mutex_unlock(&priv->mutex);
8625
8626         IWL_DEBUG_INFO("Queueing UP work.\n");
8627
8628         queue_work(priv->workqueue, &priv->up);
8629
8630         return 0;
8631
8632  out_pci_alloc:
8633         iwl3945_dealloc_ucode_pci(priv);
8634
8635         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8636
8637  out_release_irq:
8638         free_irq(pdev->irq, priv);
8639
8640  out_disable_msi:
8641         pci_disable_msi(pdev);
8642         destroy_workqueue(priv->workqueue);
8643         priv->workqueue = NULL;
8644         iwl3945_unset_hw_setting(priv);
8645
8646  out_iounmap:
8647         pci_iounmap(pdev, priv->hw_base);
8648  out_pci_release_regions:
8649         pci_release_regions(pdev);
8650  out_pci_disable_device:
8651         pci_disable_device(pdev);
8652         pci_set_drvdata(pdev, NULL);
8653  out_ieee80211_free_hw:
8654         ieee80211_free_hw(priv->hw);
8655  out:
8656         return err;
8657 }
8658
8659 static void iwl3945_pci_remove(struct pci_dev *pdev)
8660 {
8661         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8662         struct list_head *p, *q;
8663         int i;
8664
8665         if (!priv)
8666                 return;
8667
8668         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8669
8670         set_bit(STATUS_EXIT_PENDING, &priv->status);
8671
8672         iwl3945_down(priv);
8673
8674         /* Free MAC hash list for ADHOC */
8675         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8676                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8677                         list_del(p);
8678                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8679                 }
8680         }
8681
8682         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8683
8684         iwl3945_dealloc_ucode_pci(priv);
8685
8686         if (priv->rxq.bd)
8687                 iwl3945_rx_queue_free(priv, &priv->rxq);
8688         iwl3945_hw_txq_ctx_free(priv);
8689
8690         iwl3945_unset_hw_setting(priv);
8691         iwl3945_clear_stations_table(priv);
8692
8693         if (priv->mac80211_registered) {
8694                 ieee80211_unregister_hw(priv->hw);
8695                 iwl3945_rate_control_unregister(priv->hw);
8696         }
8697
8698         /*netif_stop_queue(dev); */
8699         flush_workqueue(priv->workqueue);
8700
8701         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8702          * priv->workqueue... so we can't take down the workqueue
8703          * until now... */
8704         destroy_workqueue(priv->workqueue);
8705         priv->workqueue = NULL;
8706
8707         free_irq(pdev->irq, priv);
8708         pci_disable_msi(pdev);
8709         pci_iounmap(pdev, priv->hw_base);
8710         pci_release_regions(pdev);
8711         pci_disable_device(pdev);
8712         pci_set_drvdata(pdev, NULL);
8713
8714         kfree(priv->channel_info);
8715
8716         kfree(priv->ieee_channels);
8717         kfree(priv->ieee_rates);
8718
8719         if (priv->ibss_beacon)
8720                 dev_kfree_skb(priv->ibss_beacon);
8721
8722         ieee80211_free_hw(priv->hw);
8723 }
8724
8725 #ifdef CONFIG_PM
8726
8727 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8728 {
8729         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8730
8731         set_bit(STATUS_IN_SUSPEND, &priv->status);
8732
8733         /* Take down the device; powers it off, etc. */
8734         iwl3945_down(priv);
8735
8736         if (priv->mac80211_registered)
8737                 ieee80211_stop_queues(priv->hw);
8738
8739         pci_save_state(pdev);
8740         pci_disable_device(pdev);
8741         pci_set_power_state(pdev, PCI_D3hot);
8742
8743         return 0;
8744 }
8745
8746 static void iwl3945_resume(struct iwl3945_priv *priv)
8747 {
8748         unsigned long flags;
8749
8750         /* The following it a temporary work around due to the
8751          * suspend / resume not fully initializing the NIC correctly.
8752          * Without all of the following, resume will not attempt to take
8753          * down the NIC (it shouldn't really need to) and will just try
8754          * and bring the NIC back up.  However that fails during the
8755          * ucode verification process.  This then causes iwl3945_down to be
8756          * called *after* iwl3945_hw_nic_init() has succeeded -- which
8757          * then lets the next init sequence succeed.  So, we've
8758          * replicated all of that NIC init code here... */
8759
8760         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
8761
8762         iwl3945_hw_nic_init(priv);
8763
8764         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8765         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8766                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8767         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
8768         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8769         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8770
8771         /* tell the device to stop sending interrupts */
8772         iwl3945_disable_interrupts(priv);
8773
8774         spin_lock_irqsave(&priv->lock, flags);
8775         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8776
8777         if (!iwl3945_grab_nic_access(priv)) {
8778                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
8779                                          APMG_CLK_VAL_DMA_CLK_RQT);
8780                 iwl3945_release_nic_access(priv);
8781         }
8782         spin_unlock_irqrestore(&priv->lock, flags);
8783
8784         udelay(5);
8785
8786         iwl3945_hw_nic_reset(priv);
8787
8788         /* Bring the device back up */
8789         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8790         queue_work(priv->workqueue, &priv->up);
8791 }
8792
8793 static int iwl3945_pci_resume(struct pci_dev *pdev)
8794 {
8795         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8796         int err;
8797
8798         printk(KERN_INFO "Coming out of suspend...\n");
8799
8800         pci_set_power_state(pdev, PCI_D0);
8801         err = pci_enable_device(pdev);
8802         pci_restore_state(pdev);
8803
8804         /*
8805          * Suspend/Resume resets the PCI configuration space, so we have to
8806          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8807          * from interfering with C3 CPU state. pci_restore_state won't help
8808          * here since it only restores the first 64 bytes pci config header.
8809          */
8810         pci_write_config_byte(pdev, 0x41, 0x00);
8811
8812         iwl3945_resume(priv);
8813
8814         return 0;
8815 }
8816
8817 #endif /* CONFIG_PM */
8818
8819 /*****************************************************************************
8820  *
8821  * driver and module entry point
8822  *
8823  *****************************************************************************/
8824
8825 static struct pci_driver iwl3945_driver = {
8826         .name = DRV_NAME,
8827         .id_table = iwl3945_hw_card_ids,
8828         .probe = iwl3945_pci_probe,
8829         .remove = __devexit_p(iwl3945_pci_remove),
8830 #ifdef CONFIG_PM
8831         .suspend = iwl3945_pci_suspend,
8832         .resume = iwl3945_pci_resume,
8833 #endif
8834 };
8835
8836 static int __init iwl3945_init(void)
8837 {
8838
8839         int ret;
8840         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8841         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8842         ret = pci_register_driver(&iwl3945_driver);
8843         if (ret) {
8844                 IWL_ERROR("Unable to initialize PCI module\n");
8845                 return ret;
8846         }
8847 #ifdef CONFIG_IWL3945_DEBUG
8848         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8849         if (ret) {
8850                 IWL_ERROR("Unable to create driver sysfs file\n");
8851                 pci_unregister_driver(&iwl3945_driver);
8852                 return ret;
8853         }
8854 #endif
8855
8856         return ret;
8857 }
8858
8859 static void __exit iwl3945_exit(void)
8860 {
8861 #ifdef CONFIG_IWL3945_DEBUG
8862         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8863 #endif
8864         pci_unregister_driver(&iwl3945_driver);
8865 }
8866
8867 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8868 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8869 module_param_named(disable, iwl3945_param_disable, int, 0444);
8870 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8871 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8872 MODULE_PARM_DESC(hwcrypto,
8873                  "using hardware crypto engine (default 0 [software])\n");
8874 module_param_named(debug, iwl3945_param_debug, int, 0444);
8875 MODULE_PARM_DESC(debug, "debug output mask");
8876 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8877 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8878
8879 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8880 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8881
8882 /* QoS */
8883 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8884 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8885
8886 module_exit(iwl3945_exit);
8887 module_init(iwl3945_init);