git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_MAX_NUM_QUEUES,
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /*************** STATION TABLE MANAGEMENT ****
  99  * mac80211 should be examined to determine if sta_info is duplicating
 100  * the functionality provided here
 101  */
 102
 103 /**************************************************************/
 104 #if 0 /* temporary disable till we add real remove station */
 105 /**
 106  * iwl3945_remove_station - Remove driver's knowledge of station.
 107  *
 108  * NOTE:  This does not remove station from device's station table.
 109  */
 110 static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 111 {
 112         int index = IWL_INVALID_STATION;
 113         int i;
 114         unsigned long flags;
 115
 116         spin_lock_irqsave(&priv->sta_lock, flags);
 117
 118         if (is_ap)
 119                 index = IWL_AP_ID;
 120         else if (is_broadcast_ether_addr(addr))
 121                 index = priv->hw_params.bcast_sta_id;
 122         else
 123                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 124                         if (priv->stations_39[i].used &&
 125                             !compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 126                                                 addr)) {
 127                                 index = i;
 128                                 break;
 129                         }
 130
 131         if (unlikely(index == IWL_INVALID_STATION))
 132                 goto out;
 133
 134         if (priv->stations_39[index].used) {
 135                 priv->stations_39[index].used = 0;
 136                 priv->num_stations--;
 137         }
 138
 139         BUG_ON(priv->num_stations < 0);
 140
 141 out:
 142         spin_unlock_irqrestore(&priv->sta_lock, flags);
 143         return 0;
 144 }
 145 #endif
 146
 147 /**
 148  * iwl3945_clear_stations_table - Clear the driver's station table
 149  *
 150  * NOTE:  This does not clear or otherwise alter the device's station table.
 151  */
 152 void iwl3945_clear_stations_table(struct iwl_priv *priv)
 153 {
 154         unsigned long flags;
 155
 156         spin_lock_irqsave(&priv->sta_lock, flags);
 157
 158         priv->num_stations = 0;
 159         memset(priv->stations_39, 0, sizeof(priv->stations_39));
 160
 161         spin_unlock_irqrestore(&priv->sta_lock, flags);
 162 }
 163
 164 /**
 165  * iwl3945_add_station - Add station to station tables in driver and device
 166  */
 167 u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 168 {
 169         int i;
 170         int index = IWL_INVALID_STATION;
 171         struct iwl3945_station_entry *station;
 172         unsigned long flags_spin;
 173         u8 rate;
 174
 175         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 176         if (is_ap)
 177                 index = IWL_AP_ID;
 178         else if (is_broadcast_ether_addr(addr))
 179                 index = priv->hw_params.bcast_sta_id;
 180         else
 181                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 182                         if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 183                                                 addr)) {
 184                                 index = i;
 185                                 break;
 186                         }
 187
 188                         if (!priv->stations_39[i].used &&
 189                             index == IWL_INVALID_STATION)
 190                                 index = i;
 191                 }
 192
 193         /* These two conditions has the same outcome but keep them separate
 194           since they have different meaning */
 195         if (unlikely(index == IWL_INVALID_STATION)) {
 196                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 197                 return index;
 198         }
 199
 200         if (priv->stations_39[index].used &&
 201            !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) {
 202                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 203                 return index;
 204         }
 205
 206         IWL_DEBUG_ASSOC(priv, "Add STA ID %d: %pM\n", index, addr);
 207         station = &priv->stations_39[index];
 208         station->used = 1;
 209         priv->num_stations++;
 210
 211         /* Set up the REPLY_ADD_STA command to send to device */
 212         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 213         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 214         station->sta.mode = 0;
 215         station->sta.sta.sta_id = index;
 216         station->sta.station_flags = 0;
 217
 218         if (priv->band == IEEE80211_BAND_5GHZ)
 219                 rate = IWL_RATE_6M_PLCP;
 220         else
 221                 rate =  IWL_RATE_1M_PLCP;
 222
 223         /* Turn on both antennas for the station... */
 224         station->sta.rate_n_flags =
 225                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 226
 227         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 228
 229         /* Add station to device's station table */
 230         iwl_send_add_sta(priv,
 231                          (struct iwl_addsta_cmd *)&station->sta, flags);
 232         return index;
 233
 234 }
 235
 236 /**
 237  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 238  * @priv: eeprom and antenna fields are used to determine antenna flags
 239  *
 240  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 241  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 242  *
 243  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 244  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 245  * IWL_ANTENNA_AUX       - Force AUX antenna
 246  */
 247 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 248 {
 249         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 250
 251         switch (iwl3945_mod_params.antenna) {
 252         case IWL_ANTENNA_DIVERSITY:
 253                 return 0;
 254
 255         case IWL_ANTENNA_MAIN:
 256                 if (eeprom->antenna_switch_type)
 257                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 258                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 259
 260         case IWL_ANTENNA_AUX:
 261                 if (eeprom->antenna_switch_type)
 262                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 263                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 264         }
 265
 266         /* bad antenna selector value */
 267         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 268                 iwl3945_mod_params.antenna);
 269
 270         return 0;               /* "diversity" is default if error */
 271 }
 272
 273 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 274                                    struct ieee80211_key_conf *keyconf,
 275                                    u8 sta_id)
 276 {
 277         unsigned long flags;
 278         __le16 key_flags = 0;
 279         int ret;
 280
 281         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 282         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 283
 284         if (sta_id == priv->hw_params.bcast_sta_id)
 285                 key_flags |= STA_KEY_MULTICAST_MSK;
 286
 287         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 288         keyconf->hw_key_idx = keyconf->keyidx;
 289         key_flags &= ~STA_KEY_FLG_INVALID;
 290
 291         spin_lock_irqsave(&priv->sta_lock, flags);
 292         priv->stations_39[sta_id].keyinfo.alg = keyconf->alg;
 293         priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen;
 294         memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key,
 295                keyconf->keylen);
 296
 297         memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key,
 298                keyconf->keylen);
 299
 300         if ((priv->stations_39[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 301                         == STA_KEY_FLG_NO_ENC)
 302                 priv->stations_39[sta_id].sta.key.key_offset =
 303                                  iwl_get_free_ucode_key_index(priv);
 304         /* else, we are overriding an existing key => no need to allocated room
 305         * in uCode. */
 306
 307         WARN(priv->stations_39[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 308                 "no space for a new key");
 309
 310         priv->stations_39[sta_id].sta.key.key_flags = key_flags;
 311         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 312         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 313
 314         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 315
 316         ret = iwl_send_add_sta(priv,
 317                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, CMD_ASYNC);
 318
 319         spin_unlock_irqrestore(&priv->sta_lock, flags);
 320
 321         return ret;
 322 }
 323
 324 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 325                                   struct ieee80211_key_conf *keyconf,
 326                                   u8 sta_id)
 327 {
 328         return -EOPNOTSUPP;
 329 }
 330
 331 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 332                                   struct ieee80211_key_conf *keyconf,
 333                                   u8 sta_id)
 334 {
 335         return -EOPNOTSUPP;
 336 }
 337
 338 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 339 {
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&priv->sta_lock, flags);
 343         memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
 344         memset(&priv->stations_39[sta_id].sta.key, 0,
 345                 sizeof(struct iwl4965_keyinfo));
 346         priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 347         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 348         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 349         spin_unlock_irqrestore(&priv->sta_lock, flags);
 350
 351         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 352         iwl_send_add_sta(priv,
 353                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, 0);
 354         return 0;
 355 }
 356
 357 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 358                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 359 {
 360         int ret = 0;
 361
 362         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 363
 364         switch (keyconf->alg) {
 365         case ALG_CCMP:
 366                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 367                 break;
 368         case ALG_TKIP:
 369                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 370                 break;
 371         case ALG_WEP:
 372                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 373                 break;
 374         default:
 375                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 376                 ret = -EINVAL;
 377         }
 378
 379         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 380                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 381                       sta_id, ret);
 382
 383         return ret;
 384 }
 385
 386 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 387 {
 388         int ret = -EOPNOTSUPP;
 389
 390         return ret;
 391 }
 392
 393 static int iwl3945_set_static_key(struct iwl_priv *priv,
 394                                 struct ieee80211_key_conf *key)
 395 {
 396         if (key->alg == ALG_WEP)
 397                 return -EOPNOTSUPP;
 398
 399         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 400         return -EINVAL;
 401 }
 402
 403 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 404 {
 405         struct list_head *element;
 406
 407         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 408                        priv->frames_count);
 409
 410         while (!list_empty(&priv->free_frames)) {
 411                 element = priv->free_frames.next;
 412                 list_del(element);
 413                 kfree(list_entry(element, struct iwl3945_frame, list));
 414                 priv->frames_count--;
 415         }
 416
 417         if (priv->frames_count) {
 418                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 419                             priv->frames_count);
 420                 priv->frames_count = 0;
 421         }
 422 }
 423
 424 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 425 {
 426         struct iwl3945_frame *frame;
 427         struct list_head *element;
 428         if (list_empty(&priv->free_frames)) {
 429                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 430                 if (!frame) {
 431                         IWL_ERR(priv, "Could not allocate frame!\n");
 432                         return NULL;
 433                 }
 434
 435                 priv->frames_count++;
 436                 return frame;
 437         }
 438
 439         element = priv->free_frames.next;
 440         list_del(element);
 441         return list_entry(element, struct iwl3945_frame, list);
 442 }
 443
 444 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 445 {
 446         memset(frame, 0, sizeof(*frame));
 447         list_add(&frame->list, &priv->free_frames);
 448 }
 449
 450 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 451                                 struct ieee80211_hdr *hdr,
 452                                 int left)
 453 {
 454
 455         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 456             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 457              (priv->iw_mode != NL80211_IFTYPE_AP)))
 458                 return 0;
 459
 460         if (priv->ibss_beacon->len > left)
 461                 return 0;
 462
 463         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 464
 465         return priv->ibss_beacon->len;
 466 }
 467
 468 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 469 {
 470         struct iwl3945_frame *frame;
 471         unsigned int frame_size;
 472         int rc;
 473         u8 rate;
 474
 475         frame = iwl3945_get_free_frame(priv);
 476
 477         if (!frame) {
 478                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 479                           "command.\n");
 480                 return -ENOMEM;
 481         }
 482
 483         rate = iwl_rate_get_lowest_plcp(priv);
 484
 485         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 486
 487         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 488                               &frame->u.cmd[0]);
 489
 490         iwl3945_free_frame(priv, frame);
 491
 492         return rc;
 493 }
 494
 495 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 496 {
 497         if (priv->shared_virt)
 498                 pci_free_consistent(priv->pci_dev,
 499                                     sizeof(struct iwl3945_shared),
 500                                     priv->shared_virt,
 501                                     priv->shared_phys);
 502 }
 503
 504 #define MAX_UCODE_BEACON_INTERVAL       1024
 505 #define INTEL_CONN_LISTEN_INTERVAL      cpu_to_le16(0xA)
 506
 507 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
 508 {
 509         u16 new_val = 0;
 510         u16 beacon_factor = 0;
 511
 512         beacon_factor =
 513             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 514                 / MAX_UCODE_BEACON_INTERVAL;
 515         new_val = beacon_val / beacon_factor;
 516
 517         return cpu_to_le16(new_val);
 518 }
 519
 520 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
 521 {
 522         u64 interval_tm_unit;
 523         u64 tsf, result;
 524         unsigned long flags;
 525         struct ieee80211_conf *conf = NULL;
 526         u16 beacon_int = 0;
 527
 528         conf = ieee80211_get_hw_conf(priv->hw);
 529
 530         spin_lock_irqsave(&priv->lock, flags);
 531         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 532         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
 533
 534         tsf = priv->timestamp;
 535
 536         beacon_int = priv->beacon_int;
 537         spin_unlock_irqrestore(&priv->lock, flags);
 538
 539         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 540                 if (beacon_int == 0) {
 541                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
 542                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
 543                 } else {
 544                         priv->rxon_timing.beacon_interval =
 545                                 cpu_to_le16(beacon_int);
 546                         priv->rxon_timing.beacon_interval =
 547                             iwl3945_adjust_beacon_interval(
 548                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 549                 }
 550
 551                 priv->rxon_timing.atim_window = 0;
 552         } else {
 553                 priv->rxon_timing.beacon_interval =
 554                         iwl3945_adjust_beacon_interval(
 555                                 priv->vif->bss_conf.beacon_int);
 556                 /* TODO: we need to get atim_window from upper stack
 557                  * for now we set to 0 */
 558                 priv->rxon_timing.atim_window = 0;
 559         }
 560
 561         interval_tm_unit =
 562                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
 563         result = do_div(tsf, interval_tm_unit);
 564         priv->rxon_timing.beacon_init_val =
 565             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
 566
 567         IWL_DEBUG_ASSOC(priv,
 568                 "beacon interval %d beacon timer %d beacon tim %d\n",
 569                 le16_to_cpu(priv->rxon_timing.beacon_interval),
 570                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
 571                 le16_to_cpu(priv->rxon_timing.atim_window));
 572 }
 573
 574 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 575                                       struct ieee80211_tx_info *info,
 576                                       struct iwl_cmd *cmd,
 577                                       struct sk_buff *skb_frag,
 578                                       int sta_id)
 579 {
 580         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 581         struct iwl3945_hw_key *keyinfo =
 582             &priv->stations_39[sta_id].keyinfo;
 583
 584         switch (keyinfo->alg) {
 585         case ALG_CCMP:
 586                 tx->sec_ctl = TX_CMD_SEC_CCM;
 587                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 588                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 589                 break;
 590
 591         case ALG_TKIP:
 592                 break;
 593
 594         case ALG_WEP:
 595                 tx->sec_ctl = TX_CMD_SEC_WEP |
 596                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 597
 598                 if (keyinfo->keylen == 13)
 599                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 600
 601                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 602
 603                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 604                              "with key %d\n", info->control.hw_key->hw_key_idx);
 605                 break;
 606
 607         default:
 608                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 609                 break;
 610         }
 611 }
 612
 613 /*
 614  * handle build REPLY_TX command notification.
 615  */
 616 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 617                                   struct iwl_cmd *cmd,
 618                                   struct ieee80211_tx_info *info,
 619                                   struct ieee80211_hdr *hdr, u8 std_id)
 620 {
 621         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 622         __le32 tx_flags = tx->tx_flags;
 623         __le16 fc = hdr->frame_control;
 624         u8 rc_flags = info->control.rates[0].flags;
 625
 626         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 627         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 628                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 629                 if (ieee80211_is_mgmt(fc))
 630                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 631                 if (ieee80211_is_probe_resp(fc) &&
 632                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 633                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 634         } else {
 635                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 636                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 637         }
 638
 639         tx->sta_id = std_id;
 640         if (ieee80211_has_morefrags(fc))
 641                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 642
 643         if (ieee80211_is_data_qos(fc)) {
 644                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 645                 tx->tid_tspec = qc[0] & 0xf;
 646                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 647         } else {
 648                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 649         }
 650
 651         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 652                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 653                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 654         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 655                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 656                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 657         }
 658
 659         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 660                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 661
 662         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 663         if (ieee80211_is_mgmt(fc)) {
 664                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 665                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 666                 else
 667                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 668         } else {
 669                 tx->timeout.pm_frame_timeout = 0;
 670 #ifdef CONFIG_IWLWIFI_LEDS
 671                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 672 #endif
 673         }
 674
 675         tx->driver_txop = 0;
 676         tx->tx_flags = tx_flags;
 677         tx->next_frame_len = 0;
 678 }
 679
 680 /*
 681  * start REPLY_TX command process
 682  */
 683 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 684 {
 685         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 686         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 687         struct iwl3945_tx_cmd *tx;
 688         struct iwl_tx_queue *txq = NULL;
 689         struct iwl_queue *q = NULL;
 690         struct iwl_cmd *out_cmd = NULL;
 691         dma_addr_t phys_addr;
 692         dma_addr_t txcmd_phys;
 693         int txq_id = skb_get_queue_mapping(skb);
 694         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 695         u8 id;
 696         u8 unicast;
 697         u8 sta_id;
 698         u8 tid = 0;
 699         u16 seq_number = 0;
 700         __le16 fc;
 701         u8 wait_write_ptr = 0;
 702         u8 *qc = NULL;
 703         unsigned long flags;
 704         int rc;
 705
 706         spin_lock_irqsave(&priv->lock, flags);
 707         if (iwl_is_rfkill(priv)) {
 708                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 709                 goto drop_unlock;
 710         }
 711
 712         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 713                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 714                 goto drop_unlock;
 715         }
 716
 717         unicast = !is_multicast_ether_addr(hdr->addr1);
 718         id = 0;
 719
 720         fc = hdr->frame_control;
 721
 722 #ifdef CONFIG_IWLWIFI_DEBUG
 723         if (ieee80211_is_auth(fc))
 724                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 725         else if (ieee80211_is_assoc_req(fc))
 726                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 727         else if (ieee80211_is_reassoc_req(fc))
 728                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 729 #endif
 730
 731         /* drop all data frame if we are not associated */
 732         if (ieee80211_is_data(fc) &&
 733             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 734             (!iwl_is_associated(priv) ||
 735              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 736                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 737                 goto drop_unlock;
 738         }
 739
 740         spin_unlock_irqrestore(&priv->lock, flags);
 741
 742         hdr_len = ieee80211_hdrlen(fc);
 743
 744         /* Find (or create) index into station table for destination station */
 745         sta_id = iwl_get_sta_id(priv, hdr);
 746         if (sta_id == IWL_INVALID_STATION) {
 747                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 748                                hdr->addr1);
 749                 goto drop;
 750         }
 751
 752         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 753
 754         if (ieee80211_is_data_qos(fc)) {
 755                 qc = ieee80211_get_qos_ctl(hdr);
 756                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 757                 seq_number = priv->stations_39[sta_id].tid[tid].seq_number &
 758                                 IEEE80211_SCTL_SEQ;
 759                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 760                         (hdr->seq_ctrl &
 761                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 762                 seq_number += 0x10;
 763         }
 764
 765         /* Descriptor for chosen Tx queue */
 766         txq = &priv->txq[txq_id];
 767         q = &txq->q;
 768
 769         spin_lock_irqsave(&priv->lock, flags);
 770
 771         idx = get_cmd_index(q, q->write_ptr, 0);
 772
 773         /* Set up driver data for this TFD */
 774         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 775         txq->txb[q->write_ptr].skb[0] = skb;
 776
 777         /* Init first empty entry in queue's array of Tx/cmd buffers */
 778         out_cmd = txq->cmd[idx];
 779         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 780         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 781         memset(tx, 0, sizeof(*tx));
 782
 783         /*
 784          * Set up the Tx-command (not MAC!) header.
 785          * Store the chosen Tx queue and TFD index within the sequence field;
 786          * after Tx, uCode's Tx response will return this value so driver can
 787          * locate the frame within the tx queue and do post-tx processing.
 788          */
 789         out_cmd->hdr.cmd = REPLY_TX;
 790         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 791                                 INDEX_TO_SEQ(q->write_ptr)));
 792
 793         /* Copy MAC header from skb into command buffer */
 794         memcpy(tx->hdr, hdr, hdr_len);
 795
 796
 797         if (info->control.hw_key)
 798                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 799
 800         /* TODO need this for burst mode later on */
 801         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 802
 803         /* set is_hcca to 0; it probably will never be implemented */
 804         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 805
 806         /* Total # bytes to be transmitted */
 807         len = (u16)skb->len;
 808         tx->len = cpu_to_le16(len);
 809
 810
 811         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 812         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 813
 814         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 815                 txq->need_update = 1;
 816                 if (qc)
 817                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
 818         } else {
 819                 wait_write_ptr = 1;
 820                 txq->need_update = 0;
 821         }
 822
 823         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 824                      le16_to_cpu(out_cmd->hdr.sequence));
 825         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 826         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 827         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 828                            ieee80211_hdrlen(fc));
 829
 830         /*
 831          * Use the first empty entry in this queue's command buffer array
 832          * to contain the Tx command and MAC header concatenated together
 833          * (payload data will be in another buffer).
 834          * Size of this varies, due to varying MAC header length.
 835          * If end is not dword aligned, we'll have 2 extra bytes at the end
 836          * of the MAC header (device reads on dword boundaries).
 837          * We'll tell device about this padding later.
 838          */
 839         len = sizeof(struct iwl3945_tx_cmd) +
 840                         sizeof(struct iwl_cmd_header) + hdr_len;
 841
 842         len_org = len;
 843         len = (len + 3) & ~3;
 844
 845         if (len_org != len)
 846                 len_org = 1;
 847         else
 848                 len_org = 0;
 849
 850         /* Physical address of this Tx command's header (not MAC header!),
 851          * within command buffer array. */
 852         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 853                                     len, PCI_DMA_TODEVICE);
 854         /* we do not map meta data ... so we can safely access address to
 855          * provide to unmap command*/
 856         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
 857         pci_unmap_len_set(&out_cmd->meta, len, len);
 858
 859         /* Add buffer containing Tx command and MAC(!) header to TFD's
 860          * first entry */
 861         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 862                                                    txcmd_phys, len, 1, 0);
 863
 864
 865         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 866          * if any (802.11 null frames have no payload). */
 867         len = skb->len - hdr_len;
 868         if (len) {
 869                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 870                                            len, PCI_DMA_TODEVICE);
 871                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 872                                                            phys_addr, len,
 873                                                            0, U32_PAD(len));
 874         }
 875
 876
 877         /* Tell device the write index *just past* this latest filled TFD */
 878         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 879         rc = iwl_txq_update_write_ptr(priv, txq);
 880         spin_unlock_irqrestore(&priv->lock, flags);
 881
 882         if (rc)
 883                 return rc;
 884
 885         if ((iwl_queue_space(q) < q->high_mark)
 886             && priv->mac80211_registered) {
 887                 if (wait_write_ptr) {
 888                         spin_lock_irqsave(&priv->lock, flags);
 889                         txq->need_update = 1;
 890                         iwl_txq_update_write_ptr(priv, txq);
 891                         spin_unlock_irqrestore(&priv->lock, flags);
 892                 }
 893
 894                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 895         }
 896
 897         return 0;
 898
 899 drop_unlock:
 900         spin_unlock_irqrestore(&priv->lock, flags);
 901 drop:
 902         return -1;
 903 }
 904
 905 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 906
 907 #include "iwl-spectrum.h"
 908
 909 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 910 #define BEACON_TIME_MASK_HIGH   0xFF000000
 911 #define TIME_UNIT               1024
 912
 913 /*
 914  * extended beacon time format
 915  * time in usec will be changed into a 32-bit value in 8:24 format
 916  * the high 1 byte is the beacon counts
 917  * the lower 3 bytes is the time in usec within one beacon interval
 918  */
 919
 920 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 921 {
 922         u32 quot;
 923         u32 rem;
 924         u32 interval = beacon_interval * 1024;
 925
 926         if (!interval || !usec)
 927                 return 0;
 928
 929         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 930         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 931
 932         return (quot << 24) + rem;
 933 }
 934
 935 /* base is usually what we get from ucode with each received frame,
 936  * the same as HW timer counter counting down
 937  */
 938
 939 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 940 {
 941         u32 base_low = base & BEACON_TIME_MASK_LOW;
 942         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 943         u32 interval = beacon_interval * TIME_UNIT;
 944         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 945             (addon & BEACON_TIME_MASK_HIGH);
 946
 947         if (base_low > addon_low)
 948                 res += base_low - addon_low;
 949         else if (base_low < addon_low) {
 950                 res += interval + base_low - addon_low;
 951                 res += (1 << 24);
 952         } else
 953                 res += (1 << 24);
 954
 955         return cpu_to_le32(res);
 956 }
 957
 958 static int iwl3945_get_measurement(struct iwl_priv *priv,
 959                                struct ieee80211_measurement_params *params,
 960                                u8 type)
 961 {
 962         struct iwl_spectrum_cmd spectrum;
 963         struct iwl_rx_packet *res;
 964         struct iwl_host_cmd cmd = {
 965                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 966                 .data = (void *)&spectrum,
 967                 .meta.flags = CMD_WANT_SKB,
 968         };
 969         u32 add_time = le64_to_cpu(params->start_time);
 970         int rc;
 971         int spectrum_resp_status;
 972         int duration = le16_to_cpu(params->duration);
 973
 974         if (iwl_is_associated(priv))
 975                 add_time =
 976                     iwl3945_usecs_to_beacons(
 977                         le64_to_cpu(params->start_time) - priv->last_tsf,
 978                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 979
 980         memset(&spectrum, 0, sizeof(spectrum));
 981
 982         spectrum.channel_count = cpu_to_le16(1);
 983         spectrum.flags =
 984             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 985         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 986         cmd.len = sizeof(spectrum);
 987         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 988
 989         if (iwl_is_associated(priv))
 990                 spectrum.start_time =
 991                     iwl3945_add_beacon_time(priv->last_beacon_time,
 992                                 add_time,
 993                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 994         else
 995                 spectrum.start_time = 0;
 996
 997         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 998         spectrum.channels[0].channel = params->channel;
 999         spectrum.channels[0].type = type;
1000         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
1001                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
1002                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
1003
1004         rc = iwl_send_cmd_sync(priv, &cmd);
1005         if (rc)
1006                 return rc;
1007
1008         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1009         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1010                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
1011                 rc = -EIO;
1012         }
1013
1014         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
1015         switch (spectrum_resp_status) {
1016         case 0:         /* Command will be handled */
1017                 if (res->u.spectrum.id != 0xff) {
1018                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
1019                                                 res->u.spectrum.id);
1020                         priv->measurement_status &= ~MEASUREMENT_READY;
1021                 }
1022                 priv->measurement_status |= MEASUREMENT_ACTIVE;
1023                 rc = 0;
1024                 break;
1025
1026         case 1:         /* Command will not be handled */
1027                 rc = -EAGAIN;
1028                 break;
1029         }
1030
1031         dev_kfree_skb_any(cmd.meta.u.skb);
1032
1033         return rc;
1034 }
1035 #endif
1036
1037 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
1038                                struct iwl_rx_mem_buffer *rxb)
1039 {
1040         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1041         struct iwl_alive_resp *palive;
1042         struct delayed_work *pwork;
1043
1044         palive = &pkt->u.alive_frame;
1045
1046         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
1047                        "0x%01X 0x%01X\n",
1048                        palive->is_valid, palive->ver_type,
1049                        palive->ver_subtype);
1050
1051         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1052                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
1053                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
1054                        sizeof(struct iwl_alive_resp));
1055                 pwork = &priv->init_alive_start;
1056         } else {
1057                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1058                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1059                        sizeof(struct iwl_alive_resp));
1060                 pwork = &priv->alive_start;
1061                 iwl3945_disable_events(priv);
1062         }
1063
1064         /* We delay the ALIVE response by 5ms to
1065          * give the HW RF Kill time to activate... */
1066         if (palive->is_valid == UCODE_VALID_OK)
1067                 queue_delayed_work(priv->workqueue, pwork,
1068                                    msecs_to_jiffies(5));
1069         else
1070                 IWL_WARN(priv, "uCode did not respond OK.\n");
1071 }
1072
1073 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
1074                                  struct iwl_rx_mem_buffer *rxb)
1075 {
1076 #ifdef CONFIG_IWLWIFI_DEBUG
1077         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1078 #endif
1079
1080         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
1081         return;
1082 }
1083
1084 static void iwl3945_bg_beacon_update(struct work_struct *work)
1085 {
1086         struct iwl_priv *priv =
1087                 container_of(work, struct iwl_priv, beacon_update);
1088         struct sk_buff *beacon;
1089
1090         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1091         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1092
1093         if (!beacon) {
1094                 IWL_ERR(priv, "update beacon failed\n");
1095                 return;
1096         }
1097
1098         mutex_lock(&priv->mutex);
1099         /* new beacon skb is allocated every time; dispose previous.*/
1100         if (priv->ibss_beacon)
1101                 dev_kfree_skb(priv->ibss_beacon);
1102
1103         priv->ibss_beacon = beacon;
1104         mutex_unlock(&priv->mutex);
1105
1106         iwl3945_send_beacon_cmd(priv);
1107 }
1108
1109 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
1110                                 struct iwl_rx_mem_buffer *rxb)
1111 {
1112 #ifdef CONFIG_IWLWIFI_DEBUG
1113         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1114         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
1115         u8 rate = beacon->beacon_notify_hdr.rate;
1116
1117         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
1118                 "tsf %d %d rate %d\n",
1119                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
1120                 beacon->beacon_notify_hdr.failure_frame,
1121                 le32_to_cpu(beacon->ibss_mgr_status),
1122                 le32_to_cpu(beacon->high_tsf),
1123                 le32_to_cpu(beacon->low_tsf), rate);
1124 #endif
1125
1126         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1127             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1128                 queue_work(priv->workqueue, &priv->beacon_update);
1129 }
1130
1131 /* Handle notification from uCode that card's power state is changing
1132  * due to software, hardware, or critical temperature RFKILL */
1133 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
1134                                     struct iwl_rx_mem_buffer *rxb)
1135 {
1136         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1137         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1138         unsigned long status = priv->status;
1139
1140         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
1141                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1142                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1143
1144         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1145                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1146
1147         if (flags & HW_CARD_DISABLED)
1148                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1149         else
1150                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1151
1152
1153         if (flags & SW_CARD_DISABLED)
1154                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1155         else
1156                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1157
1158         iwl_scan_cancel(priv);
1159
1160         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1161              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1162             (test_bit(STATUS_RF_KILL_SW, &status) !=
1163              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1164                 queue_work(priv->workqueue, &priv->rf_kill);
1165         else
1166                 wake_up_interruptible(&priv->wait_command_queue);
1167 }
1168
1169 /**
1170  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
1171  *
1172  * Setup the RX handlers for each of the reply types sent from the uCode
1173  * to the host.
1174  *
1175  * This function chains into the hardware specific files for them to setup
1176  * any hardware specific handlers as well.
1177  */
1178 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
1179 {
1180         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
1181         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
1182         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1183         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1184         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1185         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1186             iwl_rx_pm_debug_statistics_notif;
1187         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
1188
1189         /*
1190          * The same handler is used for both the REPLY to a discrete
1191          * statistics request from the host as well as for the periodic
1192          * statistics notifications (after received beacons) from the uCode.
1193          */
1194         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
1195         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
1196
1197         iwl_setup_spectrum_handlers(priv);
1198         iwl_setup_rx_scan_handlers(priv);
1199         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
1200
1201         /* Set up hardware specific Rx handlers */
1202         iwl3945_hw_rx_handler_setup(priv);
1203 }
1204
1205 /************************** RX-FUNCTIONS ****************************/
1206 /*
1207  * Rx theory of operation
1208  *
1209  * The host allocates 32 DMA target addresses and passes the host address
1210  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1211  * 0 to 31
1212  *
1213  * Rx Queue Indexes
1214  * The host/firmware share two index registers for managing the Rx buffers.
1215  *
1216  * The READ index maps to the first position that the firmware may be writing
1217  * to -- the driver can read up to (but not including) this position and get
1218  * good data.
1219  * The READ index is managed by the firmware once the card is enabled.
1220  *
1221  * The WRITE index maps to the last position the driver has read from -- the
1222  * position preceding WRITE is the last slot the firmware can place a packet.
1223  *
1224  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1225  * WRITE = READ.
1226  *
1227  * During initialization, the host sets up the READ queue position to the first
1228  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1229  *
1230  * When the firmware places a packet in a buffer, it will advance the READ index
1231  * and fire the RX interrupt.  The driver can then query the READ index and
1232  * process as many packets as possible, moving the WRITE index forward as it
1233  * resets the Rx queue buffers with new memory.
1234  *
1235  * The management in the driver is as follows:
1236  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1237  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1238  *   to replenish the iwl->rxq->rx_free.
1239  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1240  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1241  *   'processed' and 'read' driver indexes as well)
1242  * + A received packet is processed and handed to the kernel network stack,
1243  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1244  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1245  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1246  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1247  *   were enough free buffers and RX_STALLED is set it is cleared.
1248  *
1249  *
1250  * Driver sequence:
1251  *
1252  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1253  *                            iwl3945_rx_queue_restock
1254  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1255  *                            queue, updates firmware pointers, and updates
1256  *                            the WRITE index.  If insufficient rx_free buffers
1257  *                            are available, schedules iwl3945_rx_replenish
1258  *
1259  * -- enable interrupts --
1260  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1261  *                            READ INDEX, detaching the SKB from the pool.
1262  *                            Moves the packet buffer from queue to rx_used.
1263  *                            Calls iwl3945_rx_queue_restock to refill any empty
1264  *                            slots.
1265  * ...
1266  *
1267  */
1268
1269 /**
1270  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1271  */
1272 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1273                                           dma_addr_t dma_addr)
1274 {
1275         return cpu_to_le32((u32)dma_addr);
1276 }
1277
1278 /**
1279  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1280  *
1281  * If there are slots in the RX queue that need to be restocked,
1282  * and we have free pre-allocated buffers, fill the ranks as much
1283  * as we can, pulling from rx_free.
1284  *
1285  * This moves the 'write' index forward to catch up with 'processed', and
1286  * also updates the memory address in the firmware to reference the new
1287  * target buffer.
1288  */
1289 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1290 {
1291         struct iwl_rx_queue *rxq = &priv->rxq;
1292         struct list_head *element;
1293         struct iwl_rx_mem_buffer *rxb;
1294         unsigned long flags;
1295         int write, rc;
1296
1297         spin_lock_irqsave(&rxq->lock, flags);
1298         write = rxq->write & ~0x7;
1299         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1300                 /* Get next free Rx buffer, remove from free list */
1301                 element = rxq->rx_free.next;
1302                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1303                 list_del(element);
1304
1305                 /* Point to Rx buffer via next RBD in circular buffer */
1306                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1307                 rxq->queue[rxq->write] = rxb;
1308                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1309                 rxq->free_count--;
1310         }
1311         spin_unlock_irqrestore(&rxq->lock, flags);
1312         /* If the pre-allocated buffer pool is dropping low, schedule to
1313          * refill it */
1314         if (rxq->free_count <= RX_LOW_WATERMARK)
1315                 queue_work(priv->workqueue, &priv->rx_replenish);
1316
1317
1318         /* If we've added more space for the firmware to place data, tell it.
1319          * Increment device's write pointer in multiples of 8. */
1320         if ((write != (rxq->write & ~0x7))
1321             || (abs(rxq->write - rxq->read) > 7)) {
1322                 spin_lock_irqsave(&rxq->lock, flags);
1323                 rxq->need_update = 1;
1324                 spin_unlock_irqrestore(&rxq->lock, flags);
1325                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1326                 if (rc)
1327                         return rc;
1328         }
1329
1330         return 0;
1331 }
1332
1333 /**
1334  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1335  *
1336  * When moving to rx_free an SKB is allocated for the slot.
1337  *
1338  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1339  * This is called as a scheduled work item (except for during initialization)
1340  */
1341 static void iwl3945_rx_allocate(struct iwl_priv *priv)
1342 {
1343         struct iwl_rx_queue *rxq = &priv->rxq;
1344         struct list_head *element;
1345         struct iwl_rx_mem_buffer *rxb;
1346         unsigned long flags;
1347         spin_lock_irqsave(&rxq->lock, flags);
1348         while (!list_empty(&rxq->rx_used)) {
1349                 element = rxq->rx_used.next;
1350                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1351
1352                 /* Alloc a new receive buffer */
1353                 rxb->skb =
1354                     alloc_skb(priv->hw_params.rx_buf_size,
1355                                 __GFP_NOWARN | GFP_ATOMIC);
1356                 if (!rxb->skb) {
1357                         if (net_ratelimit())
1358                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1359                         /* We don't reschedule replenish work here -- we will
1360                          * call the restock method and if it still needs
1361                          * more buffers it will schedule replenish */
1362                         break;
1363                 }
1364
1365                 /* If radiotap head is required, reserve some headroom here.
1366                  * The physical head count is a variable rx_stats->phy_count.
1367                  * We reserve 4 bytes here. Plus these extra bytes, the
1368                  * headroom of the physical head should be enough for the
1369                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1370                  */
1371                 skb_reserve(rxb->skb, 4);
1372
1373                 priv->alloc_rxb_skb++;
1374                 list_del(element);
1375
1376                 /* Get physical address of RB/SKB */
1377                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1378                                                 rxb->skb->data,
1379                                                 priv->hw_params.rx_buf_size,
1380                                                 PCI_DMA_FROMDEVICE);
1381                 list_add_tail(&rxb->list, &rxq->rx_free);
1382                 rxq->free_count++;
1383         }
1384         spin_unlock_irqrestore(&rxq->lock, flags);
1385 }
1386
1387 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1388 {
1389         unsigned long flags;
1390         int i;
1391         spin_lock_irqsave(&rxq->lock, flags);
1392         INIT_LIST_HEAD(&rxq->rx_free);
1393         INIT_LIST_HEAD(&rxq->rx_used);
1394         /* Fill the rx_used queue with _all_ of the Rx buffers */
1395         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1396                 /* In the reset function, these buffers may have been allocated
1397                  * to an SKB, so we need to unmap and free potential storage */
1398                 if (rxq->pool[i].skb != NULL) {
1399                         pci_unmap_single(priv->pci_dev,
1400                                          rxq->pool[i].real_dma_addr,
1401                                          priv->hw_params.rx_buf_size,
1402                                          PCI_DMA_FROMDEVICE);
1403                         priv->alloc_rxb_skb--;
1404                         dev_kfree_skb(rxq->pool[i].skb);
1405                         rxq->pool[i].skb = NULL;
1406                 }
1407                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1408         }
1409
1410         /* Set us so that we have processed and used all buffers, but have
1411          * not restocked the Rx queue with fresh buffers */
1412         rxq->read = rxq->write = 0;
1413         rxq->free_count = 0;
1414         spin_unlock_irqrestore(&rxq->lock, flags);
1415 }
1416
1417 /*
1418  * this should be called while priv->lock is locked
1419  */
1420 static void __iwl3945_rx_replenish(void *data)
1421 {
1422         struct iwl_priv *priv = data;
1423
1424         iwl3945_rx_allocate(priv);
1425         iwl3945_rx_queue_restock(priv);
1426 }
1427
1428
1429 void iwl3945_rx_replenish(void *data)
1430 {
1431         struct iwl_priv *priv = data;
1432         unsigned long flags;
1433
1434         iwl3945_rx_allocate(priv);
1435
1436         spin_lock_irqsave(&priv->lock, flags);
1437         iwl3945_rx_queue_restock(priv);
1438         spin_unlock_irqrestore(&priv->lock, flags);
1439 }
1440
1441 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1442  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1443  * This free routine walks the list of POOL entries and if SKB is set to
1444  * non NULL it is unmapped and freed
1445  */
1446 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1447 {
1448         int i;
1449         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1450                 if (rxq->pool[i].skb != NULL) {
1451                         pci_unmap_single(priv->pci_dev,
1452                                          rxq->pool[i].real_dma_addr,
1453                                          priv->hw_params.rx_buf_size,
1454                                          PCI_DMA_FROMDEVICE);
1455                         dev_kfree_skb(rxq->pool[i].skb);
1456                 }
1457         }
1458
1459         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1460                             rxq->dma_addr);
1461         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1462                             rxq->rb_stts, rxq->rb_stts_dma);
1463         rxq->bd = NULL;
1464         rxq->rb_stts  = NULL;
1465 }
1466 EXPORT_SYMBOL(iwl3945_rx_queue_free);
1467
1468
1469 /* Convert linear signal-to-noise ratio into dB */
1470 static u8 ratio2dB[100] = {
1471 /*       0   1   2   3   4   5   6   7   8   9 */
1472          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1473         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1474         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1475         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1476         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1477         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1478         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1479         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1480         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1481         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1482 };
1483
1484 /* Calculates a relative dB value from a ratio of linear
1485  *   (i.e. not dB) signal levels.
1486  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1487 int iwl3945_calc_db_from_ratio(int sig_ratio)
1488 {
1489         /* 1000:1 or higher just report as 60 dB */
1490         if (sig_ratio >= 1000)
1491                 return 60;
1492
1493         /* 100:1 or higher, divide by 10 and use table,
1494          *   add 20 dB to make up for divide by 10 */
1495         if (sig_ratio >= 100)
1496                 return 20 + (int)ratio2dB[sig_ratio/10];
1497
1498         /* We shouldn't see this */
1499         if (sig_ratio < 1)
1500                 return 0;
1501
1502         /* Use table for ratios 1:1 - 99:1 */
1503         return (int)ratio2dB[sig_ratio];
1504 }
1505
1506 #define PERFECT_RSSI (-20) /* dBm */
1507 #define WORST_RSSI (-95)   /* dBm */
1508 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1509
1510 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1511  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1512  *   about formulas used below. */
1513 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1514 {
1515         int sig_qual;
1516         int degradation = PERFECT_RSSI - rssi_dbm;
1517
1518         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1519          * as indicator; formula is (signal dbm - noise dbm).
1520          * SNR at or above 40 is a great signal (100%).
1521          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1522          * Weakest usable signal is usually 10 - 15 dB SNR. */
1523         if (noise_dbm) {
1524                 if (rssi_dbm - noise_dbm >= 40)
1525                         return 100;
1526                 else if (rssi_dbm < noise_dbm)
1527                         return 0;
1528                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1529
1530         /* Else use just the signal level.
1531          * This formula is a least squares fit of data points collected and
1532          *   compared with a reference system that had a percentage (%) display
1533          *   for signal quality. */
1534         } else
1535                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1536                             (15 * RSSI_RANGE + 62 * degradation)) /
1537                            (RSSI_RANGE * RSSI_RANGE);
1538
1539         if (sig_qual > 100)
1540                 sig_qual = 100;
1541         else if (sig_qual < 1)
1542                 sig_qual = 0;
1543
1544         return sig_qual;
1545 }
1546
1547 /**
1548  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1549  *
1550  * Uses the priv->rx_handlers callback function array to invoke
1551  * the appropriate handlers, including command responses,
1552  * frame-received notifications, and other notifications.
1553  */
1554 static void iwl3945_rx_handle(struct iwl_priv *priv)
1555 {
1556         struct iwl_rx_mem_buffer *rxb;
1557         struct iwl_rx_packet *pkt;
1558         struct iwl_rx_queue *rxq = &priv->rxq;
1559         u32 r, i;
1560         int reclaim;
1561         unsigned long flags;
1562         u8 fill_rx = 0;
1563         u32 count = 8;
1564
1565         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1566          * buffer that the driver may process (last buffer filled by ucode). */
1567         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1568         i = rxq->read;
1569
1570         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1571                 fill_rx = 1;
1572         /* Rx interrupt, but nothing sent from uCode */
1573         if (i == r)
1574                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1575
1576         while (i != r) {
1577                 rxb = rxq->queue[i];
1578
1579                 /* If an RXB doesn't have a Rx queue slot associated with it,
1580                  * then a bug has been introduced in the queue refilling
1581                  * routines -- catch it here */
1582                 BUG_ON(rxb == NULL);
1583
1584                 rxq->queue[i] = NULL;
1585
1586                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1587                                 priv->hw_params.rx_buf_size,
1588                                 PCI_DMA_FROMDEVICE);
1589                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1590
1591                 /* Reclaim a command buffer only if this packet is a response
1592                  *   to a (driver-originated) command.
1593                  * If the packet (e.g. Rx frame) originated from uCode,
1594                  *   there is no command buffer to reclaim.
1595                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1596                  *   but apparently a few don't get set; catch them here. */
1597                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1598                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1599                         (pkt->hdr.cmd != REPLY_TX);
1600
1601                 /* Based on type of command response or notification,
1602                  *   handle those that need handling via function in
1603                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1604                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1605                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1606                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1607                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1608                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1609                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1610                 } else {
1611                         /* No handling needed */
1612                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1613                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1614                                 r, i, get_cmd_string(pkt->hdr.cmd),
1615                                 pkt->hdr.cmd);
1616                 }
1617
1618                 if (reclaim) {
1619                         /* Invoke any callbacks, transfer the skb to caller, and
1620                          * fire off the (possibly) blocking iwl_send_cmd()
1621                          * as we reclaim the driver command queue */
1622                         if (rxb && rxb->skb)
1623                                 iwl_tx_cmd_complete(priv, rxb);
1624                         else
1625                                 IWL_WARN(priv, "Claim null rxb?\n");
1626                 }
1627
1628                 /* For now we just don't re-use anything.  We can tweak this
1629                  * later to try and re-use notification packets and SKBs that
1630                  * fail to Rx correctly */
1631                 if (rxb->skb != NULL) {
1632                         priv->alloc_rxb_skb--;
1633                         dev_kfree_skb_any(rxb->skb);
1634                         rxb->skb = NULL;
1635                 }
1636
1637                 spin_lock_irqsave(&rxq->lock, flags);
1638                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1639                 spin_unlock_irqrestore(&rxq->lock, flags);
1640                 i = (i + 1) & RX_QUEUE_MASK;
1641                 /* If there are a lot of unused frames,
1642                  * restock the Rx queue so ucode won't assert. */
1643                 if (fill_rx) {
1644                         count++;
1645                         if (count >= 8) {
1646                                 priv->rxq.read = i;
1647                                 __iwl3945_rx_replenish(priv);
1648                                 count = 0;
1649                         }
1650                 }
1651         }
1652
1653         /* Backtrack one entry */
1654         priv->rxq.read = i;
1655         iwl3945_rx_queue_restock(priv);
1656 }
1657
1658 /* call this function to flush any scheduled tasklet */
1659 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1660 {
1661         /* wait to make sure we flush pending tasklet*/
1662         synchronize_irq(priv->pci_dev->irq);
1663         tasklet_kill(&priv->irq_tasklet);
1664 }
1665
1666 static const char *desc_lookup(int i)
1667 {
1668         switch (i) {
1669         case 1:
1670                 return "FAIL";
1671         case 2:
1672                 return "BAD_PARAM";
1673         case 3:
1674                 return "BAD_CHECKSUM";
1675         case 4:
1676                 return "NMI_INTERRUPT";
1677         case 5:
1678                 return "SYSASSERT";
1679         case 6:
1680                 return "FATAL_ERROR";
1681         }
1682
1683         return "UNKNOWN";
1684 }
1685
1686 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1687 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1688
1689 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1690 {
1691         u32 i;
1692         u32 desc, time, count, base, data1;
1693         u32 blink1, blink2, ilink1, ilink2;
1694         int rc;
1695
1696         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1697
1698         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1699                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1700                 return;
1701         }
1702
1703         rc = iwl_grab_nic_access(priv);
1704         if (rc) {
1705                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1706                 return;
1707         }
1708
1709         count = iwl_read_targ_mem(priv, base);
1710
1711         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1712                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1713                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1714                         priv->status, count);
1715         }
1716
1717         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1718                   "ilink1  nmiPC   Line\n");
1719         for (i = ERROR_START_OFFSET;
1720              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1721              i += ERROR_ELEM_SIZE) {
1722                 desc = iwl_read_targ_mem(priv, base + i);
1723                 time =
1724                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1725                 blink1 =
1726                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1727                 blink2 =
1728                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1729                 ilink1 =
1730                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1731                 ilink2 =
1732                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1733                 data1 =
1734                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1735
1736                 IWL_ERR(priv,
1737                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1738                         desc_lookup(desc), desc, time, blink1, blink2,
1739                         ilink1, ilink2, data1);
1740         }
1741
1742         iwl_release_nic_access(priv);
1743
1744 }
1745
1746 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1747
1748 /**
1749  * iwl3945_print_event_log - Dump error event log to syslog
1750  *
1751  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1752  */
1753 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1754                                 u32 num_events, u32 mode)
1755 {
1756         u32 i;
1757         u32 base;       /* SRAM byte address of event log header */
1758         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1759         u32 ptr;        /* SRAM byte address of log data */
1760         u32 ev, time, data; /* event log data */
1761
1762         if (num_events == 0)
1763                 return;
1764
1765         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1766
1767         if (mode == 0)
1768                 event_size = 2 * sizeof(u32);
1769         else
1770                 event_size = 3 * sizeof(u32);
1771
1772         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1773
1774         /* "time" is actually "data" for mode 0 (no timestamp).
1775          * place event id # at far right for easier visual parsing. */
1776         for (i = 0; i < num_events; i++) {
1777                 ev = iwl_read_targ_mem(priv, ptr);
1778                 ptr += sizeof(u32);
1779                 time = iwl_read_targ_mem(priv, ptr);
1780                 ptr += sizeof(u32);
1781                 if (mode == 0) {
1782                         /* data, ev */
1783                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1784                 } else {
1785                         data = iwl_read_targ_mem(priv, ptr);
1786                         ptr += sizeof(u32);
1787                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1788                 }
1789         }
1790 }
1791
1792 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1793 {
1794         int rc;
1795         u32 base;       /* SRAM byte address of event log header */
1796         u32 capacity;   /* event log capacity in # entries */
1797         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1798         u32 num_wraps;  /* # times uCode wrapped to top of log */
1799         u32 next_entry; /* index of next entry to be written by uCode */
1800         u32 size;       /* # entries that we'll print */
1801
1802         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1803         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1804                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1805                 return;
1806         }
1807
1808         rc = iwl_grab_nic_access(priv);
1809         if (rc) {
1810                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1811                 return;
1812         }
1813
1814         /* event log header */
1815         capacity = iwl_read_targ_mem(priv, base);
1816         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1817         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1818         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1819
1820         size = num_wraps ? capacity : next_entry;
1821
1822         /* bail out if nothing in log */
1823         if (size == 0) {
1824                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1825                 iwl_release_nic_access(priv);
1826                 return;
1827         }
1828
1829         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1830                   size, num_wraps);
1831
1832         /* if uCode has wrapped back to top of log, start at the oldest entry,
1833          * i.e the next one that uCode would fill. */
1834         if (num_wraps)
1835                 iwl3945_print_event_log(priv, next_entry,
1836                                     capacity - next_entry, mode);
1837
1838         /* (then/else) start at top of log */
1839         iwl3945_print_event_log(priv, 0, next_entry, mode);
1840
1841         iwl_release_nic_access(priv);
1842 }
1843
1844 static void iwl3945_error_recovery(struct iwl_priv *priv)
1845 {
1846         unsigned long flags;
1847
1848         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1849                sizeof(priv->staging_rxon));
1850         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1851         iwlcore_commit_rxon(priv);
1852
1853         priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 1, 0, NULL);
1854
1855         spin_lock_irqsave(&priv->lock, flags);
1856         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1857         priv->error_recovering = 0;
1858         spin_unlock_irqrestore(&priv->lock, flags);
1859 }
1860
1861 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1862 {
1863         u32 inta, handled = 0;
1864         u32 inta_fh;
1865         unsigned long flags;
1866 #ifdef CONFIG_IWLWIFI_DEBUG
1867         u32 inta_mask;
1868 #endif
1869
1870         spin_lock_irqsave(&priv->lock, flags);
1871
1872         /* Ack/clear/reset pending uCode interrupts.
1873          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1874          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1875         inta = iwl_read32(priv, CSR_INT);
1876         iwl_write32(priv, CSR_INT, inta);
1877
1878         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1879          * Any new interrupts that happen after this, either while we're
1880          * in this tasklet, or later, will show up in next ISR/tasklet. */
1881         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1882         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1883
1884 #ifdef CONFIG_IWLWIFI_DEBUG
1885         if (priv->debug_level & IWL_DL_ISR) {
1886                 /* just for debug */
1887                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1888                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1889                               inta, inta_mask, inta_fh);
1890         }
1891 #endif
1892
1893         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1894          * atomic, make sure that inta covers all the interrupts that
1895          * we've discovered, even if FH interrupt came in just after
1896          * reading CSR_INT. */
1897         if (inta_fh & CSR39_FH_INT_RX_MASK)
1898                 inta |= CSR_INT_BIT_FH_RX;
1899         if (inta_fh & CSR39_FH_INT_TX_MASK)
1900                 inta |= CSR_INT_BIT_FH_TX;
1901
1902         /* Now service all interrupt bits discovered above. */
1903         if (inta & CSR_INT_BIT_HW_ERR) {
1904                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1905
1906                 /* Tell the device to stop sending interrupts */
1907                 iwl_disable_interrupts(priv);
1908
1909                 priv->isr_stats.hw++;
1910                 iwl_irq_handle_error(priv);
1911
1912                 handled |= CSR_INT_BIT_HW_ERR;
1913
1914                 spin_unlock_irqrestore(&priv->lock, flags);
1915
1916                 return;
1917         }
1918
1919 #ifdef CONFIG_IWLWIFI_DEBUG
1920         if (priv->debug_level & (IWL_DL_ISR)) {
1921                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1922                 if (inta & CSR_INT_BIT_SCD) {
1923                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1924                                       "the frame/frames.\n");
1925                         priv->isr_stats.sch++;
1926                 }
1927
1928                 /* Alive notification via Rx interrupt will do the real work */
1929                 if (inta & CSR_INT_BIT_ALIVE) {
1930                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1931                         priv->isr_stats.alive++;
1932                 }
1933         }
1934 #endif
1935         /* Safely ignore these bits for debug checks below */
1936         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1937
1938         /* Error detected by uCode */
1939         if (inta & CSR_INT_BIT_SW_ERR) {
1940                 IWL_ERR(priv, "Microcode SW error detected. "
1941                         "Restarting 0x%X.\n", inta);
1942                 priv->isr_stats.sw++;
1943                 priv->isr_stats.sw_err = inta;
1944                 iwl_irq_handle_error(priv);
1945                 handled |= CSR_INT_BIT_SW_ERR;
1946         }
1947
1948         /* uCode wakes up after power-down sleep */
1949         if (inta & CSR_INT_BIT_WAKEUP) {
1950                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1951                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1952                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1953                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1954                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1955                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1956                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1957                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1958
1959                 priv->isr_stats.wakeup++;
1960                 handled |= CSR_INT_BIT_WAKEUP;
1961         }
1962
1963         /* All uCode command responses, including Tx command responses,
1964          * Rx "responses" (frame-received notification), and other
1965          * notifications from uCode come through here*/
1966         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1967                 iwl3945_rx_handle(priv);
1968                 priv->isr_stats.rx++;
1969                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1970         }
1971
1972         if (inta & CSR_INT_BIT_FH_TX) {
1973                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1974                 priv->isr_stats.tx++;
1975
1976                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1977                 if (!iwl_grab_nic_access(priv)) {
1978                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
1979                                              (FH39_SRVC_CHNL), 0x0);
1980                         iwl_release_nic_access(priv);
1981                 }
1982                 handled |= CSR_INT_BIT_FH_TX;
1983         }
1984
1985         if (inta & ~handled) {
1986                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1987                 priv->isr_stats.unhandled++;
1988         }
1989
1990         if (inta & ~CSR_INI_SET_MASK) {
1991                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1992                          inta & ~CSR_INI_SET_MASK);
1993                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1994         }
1995
1996         /* Re-enable all interrupts */
1997         /* only Re-enable if disabled by irq */
1998         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1999                 iwl_enable_interrupts(priv);
2000
2001 #ifdef CONFIG_IWLWIFI_DEBUG
2002         if (priv->debug_level & (IWL_DL_ISR)) {
2003                 inta = iwl_read32(priv, CSR_INT);
2004                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2005                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2006                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2007                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2008         }
2009 #endif
2010         spin_unlock_irqrestore(&priv->lock, flags);
2011 }
2012
2013 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2014                                          enum ieee80211_band band,
2015                                      u8 is_active, u8 n_probes,
2016                                      struct iwl3945_scan_channel *scan_ch)
2017 {
2018         const struct ieee80211_channel *channels = NULL;
2019         const struct ieee80211_supported_band *sband;
2020         const struct iwl_channel_info *ch_info;
2021         u16 passive_dwell = 0;
2022         u16 active_dwell = 0;
2023         int added, i;
2024
2025         sband = iwl_get_hw_mode(priv, band);
2026         if (!sband)
2027                 return 0;
2028
2029         channels = sband->channels;
2030
2031         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2032         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2033
2034         if (passive_dwell <= active_dwell)
2035                 passive_dwell = active_dwell + 1;
2036
2037         for (i = 0, added = 0; i < sband->n_channels; i++) {
2038                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2039                         continue;
2040
2041                 scan_ch->channel = channels[i].hw_value;
2042
2043                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2044                 if (!is_channel_valid(ch_info)) {
2045                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
2046                                        scan_ch->channel);
2047                         continue;
2048                 }
2049
2050                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2051                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2052                 /* If passive , set up for auto-switch
2053                  *  and use long active_dwell time.
2054                  */
2055                 if (!is_active || is_channel_passive(ch_info) ||
2056                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2057                         scan_ch->type = 0;      /* passive */
2058                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2059                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2060                 } else {
2061                         scan_ch->type = 1;      /* active */
2062                 }
2063
2064                 /* Set direct probe bits. These may be used both for active
2065                  * scan channels (probes gets sent right away),
2066                  * or for passive channels (probes get se sent only after
2067                  * hearing clear Rx packet).*/
2068                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2069                         if (n_probes)
2070                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2071                 } else {
2072                         /* uCode v1 does not allow setting direct probe bits on
2073                          * passive channel. */
2074                         if ((scan_ch->type & 1) && n_probes)
2075                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2076                 }
2077
2078                 /* Set txpower levels to defaults */
2079                 scan_ch->tpc.dsp_atten = 110;
2080                 /* scan_pwr_info->tpc.dsp_atten; */
2081
2082                 /*scan_pwr_info->tpc.tx_gain; */
2083                 if (band == IEEE80211_BAND_5GHZ)
2084                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2085                 else {
2086                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2087                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2088                          * power level:
2089                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2090                          */
2091                 }
2092
2093                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
2094                                scan_ch->channel,
2095                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2096                                (scan_ch->type & 1) ?
2097                                active_dwell : passive_dwell);
2098
2099                 scan_ch++;
2100                 added++;
2101         }
2102
2103         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
2104         return added;
2105 }
2106
2107 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2108                               struct ieee80211_rate *rates)
2109 {
2110         int i;
2111
2112         for (i = 0; i < IWL_RATE_COUNT; i++) {
2113                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2114                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2115                 rates[i].hw_value_short = i;
2116                 rates[i].flags = 0;
2117                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2118                         /*
2119                          * If CCK != 1M then set short preamble rate flag.
2120                          */
2121                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2122                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2123                 }
2124         }
2125 }
2126
2127 /******************************************************************************
2128  *
2129  * uCode download functions
2130  *
2131  ******************************************************************************/
2132
2133 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2134 {
2135         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2136         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2137         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2138         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2139         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2140         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2141 }
2142
2143 /**
2144  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2145  *     looking at all data.
2146  */
2147 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2148 {
2149         u32 val;
2150         u32 save_len = len;
2151         int rc = 0;
2152         u32 errcnt;
2153
2154         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2155
2156         rc = iwl_grab_nic_access(priv);
2157         if (rc)
2158                 return rc;
2159
2160         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2161                                IWL39_RTC_INST_LOWER_BOUND);
2162
2163         errcnt = 0;
2164         for (; len > 0; len -= sizeof(u32), image++) {
2165                 /* read data comes through single port, auto-incr addr */
2166                 /* NOTE: Use the debugless read so we don't flood kernel log
2167                  * if IWL_DL_IO is set */
2168                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2169                 if (val != le32_to_cpu(*image)) {
2170                         IWL_ERR(priv, "uCode INST section is invalid at "
2171                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2172                                   save_len - len, val, le32_to_cpu(*image));
2173                         rc = -EIO;
2174                         errcnt++;
2175                         if (errcnt >= 20)
2176                                 break;
2177                 }
2178         }
2179
2180         iwl_release_nic_access(priv);
2181
2182         if (!errcnt)
2183                 IWL_DEBUG_INFO(priv,
2184                         "ucode image in INSTRUCTION memory is good\n");
2185
2186         return rc;
2187 }
2188
2189
2190 /**
2191  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2192  *   using sample data 100 bytes apart.  If these sample points are good,
2193  *   it's a pretty good bet that everything between them is good, too.
2194  */
2195 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2196 {
2197         u32 val;
2198         int rc = 0;
2199         u32 errcnt = 0;
2200         u32 i;
2201
2202         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2203
2204         rc = iwl_grab_nic_access(priv);
2205         if (rc)
2206                 return rc;
2207
2208         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2209                 /* read data comes through single port, auto-incr addr */
2210                 /* NOTE: Use the debugless read so we don't flood kernel log
2211                  * if IWL_DL_IO is set */
2212                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2213                         i + IWL39_RTC_INST_LOWER_BOUND);
2214                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2215                 if (val != le32_to_cpu(*image)) {
2216 #if 0 /* Enable this if you want to see details */
2217                         IWL_ERR(priv, "uCode INST section is invalid at "
2218                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2219                                   i, val, *image);
2220 #endif
2221                         rc = -EIO;
2222                         errcnt++;
2223                         if (errcnt >= 3)
2224                                 break;
2225                 }
2226         }
2227
2228         iwl_release_nic_access(priv);
2229
2230         return rc;
2231 }
2232
2233
2234 /**
2235  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2236  *    and verify its contents
2237  */
2238 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2239 {
2240         __le32 *image;
2241         u32 len;
2242         int rc = 0;
2243
2244         /* Try bootstrap */
2245         image = (__le32 *)priv->ucode_boot.v_addr;
2246         len = priv->ucode_boot.len;
2247         rc = iwl3945_verify_inst_sparse(priv, image, len);
2248         if (rc == 0) {
2249                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2250                 return 0;
2251         }
2252
2253         /* Try initialize */
2254         image = (__le32 *)priv->ucode_init.v_addr;
2255         len = priv->ucode_init.len;
2256         rc = iwl3945_verify_inst_sparse(priv, image, len);
2257         if (rc == 0) {
2258                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2259                 return 0;
2260         }
2261
2262         /* Try runtime/protocol */
2263         image = (__le32 *)priv->ucode_code.v_addr;
2264         len = priv->ucode_code.len;
2265         rc = iwl3945_verify_inst_sparse(priv, image, len);
2266         if (rc == 0) {
2267                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2268                 return 0;
2269         }
2270
2271         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2272
2273         /* Since nothing seems to match, show first several data entries in
2274          * instruction SRAM, so maybe visual inspection will give a clue.
2275          * Selection of bootstrap image (vs. other images) is arbitrary. */
2276         image = (__le32 *)priv->ucode_boot.v_addr;
2277         len = priv->ucode_boot.len;
2278         rc = iwl3945_verify_inst_full(priv, image, len);
2279
2280         return rc;
2281 }
2282
2283 static void iwl3945_nic_start(struct iwl_priv *priv)
2284 {
2285         /* Remove all resets to allow NIC to operate */
2286         iwl_write32(priv, CSR_RESET, 0);
2287 }
2288
2289 /**
2290  * iwl3945_read_ucode - Read uCode images from disk file.
2291  *
2292  * Copy into buffers for card to fetch via bus-mastering
2293  */
2294 static int iwl3945_read_ucode(struct iwl_priv *priv)
2295 {
2296         struct iwl_ucode *ucode;
2297         int ret = -EINVAL, index;
2298         const struct firmware *ucode_raw;
2299         /* firmware file name contains uCode/driver compatibility version */
2300         const char *name_pre = priv->cfg->fw_name_pre;
2301         const unsigned int api_max = priv->cfg->ucode_api_max;
2302         const unsigned int api_min = priv->cfg->ucode_api_min;
2303         char buf[25];
2304         u8 *src;
2305         size_t len;
2306         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2307
2308         /* Ask kernel firmware_class module to get the boot firmware off disk.
2309          * request_firmware() is synchronous, file is in memory on return. */
2310         for (index = api_max; index >= api_min; index--) {
2311                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2312                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2313                 if (ret < 0) {
2314                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2315                                   buf, ret);
2316                         if (ret == -ENOENT)
2317                                 continue;
2318                         else
2319                                 goto error;
2320                 } else {
2321                         if (index < api_max)
2322                                 IWL_ERR(priv, "Loaded firmware %s, "
2323                                         "which is deprecated. "
2324                                         " Please use API v%u instead.\n",
2325                                           buf, api_max);
2326                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2327                                        "(%zd bytes) from disk\n",
2328                                        buf, ucode_raw->size);
2329                         break;
2330                 }
2331         }
2332
2333         if (ret < 0)
2334                 goto error;
2335
2336         /* Make sure that we got at least our header! */
2337         if (ucode_raw->size < sizeof(*ucode)) {
2338                 IWL_ERR(priv, "File size way too small!\n");
2339                 ret = -EINVAL;
2340                 goto err_release;
2341         }
2342
2343         /* Data from ucode file:  header followed by uCode images */
2344         ucode = (void *)ucode_raw->data;
2345
2346         priv->ucode_ver = le32_to_cpu(ucode->ver);
2347         api_ver = IWL_UCODE_API(priv->ucode_ver);
2348         inst_size = le32_to_cpu(ucode->inst_size);
2349         data_size = le32_to_cpu(ucode->data_size);
2350         init_size = le32_to_cpu(ucode->init_size);
2351         init_data_size = le32_to_cpu(ucode->init_data_size);
2352         boot_size = le32_to_cpu(ucode->boot_size);
2353
2354         /* api_ver should match the api version forming part of the
2355          * firmware filename ... but we don't check for that and only rely
2356          * on the API version read from firmware header from here on forward */
2357
2358         if (api_ver < api_min || api_ver > api_max) {
2359                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2360                           "Driver supports v%u, firmware is v%u.\n",
2361                           api_max, api_ver);
2362                 priv->ucode_ver = 0;
2363                 ret = -EINVAL;
2364                 goto err_release;
2365         }
2366         if (api_ver != api_max)
2367                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2368                           "got %u. New firmware can be obtained "
2369                           "from http://www.intellinuxwireless.org.\n",
2370                           api_max, api_ver);
2371
2372         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2373                 IWL_UCODE_MAJOR(priv->ucode_ver),
2374                 IWL_UCODE_MINOR(priv->ucode_ver),
2375                 IWL_UCODE_API(priv->ucode_ver),
2376                 IWL_UCODE_SERIAL(priv->ucode_ver));
2377
2378         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2379                        priv->ucode_ver);
2380         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2381                        inst_size);
2382         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2383                        data_size);
2384         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2385                        init_size);
2386         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2387                        init_data_size);
2388         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2389                        boot_size);
2390
2391
2392         /* Verify size of file vs. image size info in file's header */
2393         if (ucode_raw->size < sizeof(*ucode) +
2394                 inst_size + data_size + init_size +
2395                 init_data_size + boot_size) {
2396
2397                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2398                                ucode_raw->size);
2399                 ret = -EINVAL;
2400                 goto err_release;
2401         }
2402
2403         /* Verify that uCode images will fit in card's SRAM */
2404         if (inst_size > IWL39_MAX_INST_SIZE) {
2405                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2406                                inst_size);
2407                 ret = -EINVAL;
2408                 goto err_release;
2409         }
2410
2411         if (data_size > IWL39_MAX_DATA_SIZE) {
2412                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2413                                data_size);
2414                 ret = -EINVAL;
2415                 goto err_release;
2416         }
2417         if (init_size > IWL39_MAX_INST_SIZE) {
2418                 IWL_DEBUG_INFO(priv,
2419                                 "uCode init instr len %d too large to fit in\n",
2420                                 init_size);
2421                 ret = -EINVAL;
2422                 goto err_release;
2423         }
2424         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2425                 IWL_DEBUG_INFO(priv,
2426                                 "uCode init data len %d too large to fit in\n",
2427                                 init_data_size);
2428                 ret = -EINVAL;
2429                 goto err_release;
2430         }
2431         if (boot_size > IWL39_MAX_BSM_SIZE) {
2432                 IWL_DEBUG_INFO(priv,
2433                                 "uCode boot instr len %d too large to fit in\n",
2434                                 boot_size);
2435                 ret = -EINVAL;
2436                 goto err_release;
2437         }
2438
2439         /* Allocate ucode buffers for card's bus-master loading ... */
2440
2441         /* Runtime instructions and 2 copies of data:
2442          * 1) unmodified from disk
2443          * 2) backup cache for save/restore during power-downs */
2444         priv->ucode_code.len = inst_size;
2445         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2446
2447         priv->ucode_data.len = data_size;
2448         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2449
2450         priv->ucode_data_backup.len = data_size;
2451         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2452
2453         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2454             !priv->ucode_data_backup.v_addr)
2455                 goto err_pci_alloc;
2456
2457         /* Initialization instructions and data */
2458         if (init_size && init_data_size) {
2459                 priv->ucode_init.len = init_size;
2460                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2461
2462                 priv->ucode_init_data.len = init_data_size;
2463                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2464
2465                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2466                         goto err_pci_alloc;
2467         }
2468
2469         /* Bootstrap (instructions only, no data) */
2470         if (boot_size) {
2471                 priv->ucode_boot.len = boot_size;
2472                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2473
2474                 if (!priv->ucode_boot.v_addr)
2475                         goto err_pci_alloc;
2476         }
2477
2478         /* Copy images into buffers for card's bus-master reads ... */
2479
2480         /* Runtime instructions (first block of data in file) */
2481         src = &ucode->data[0];
2482         len = priv->ucode_code.len;
2483         IWL_DEBUG_INFO(priv,
2484                 "Copying (but not loading) uCode instr len %zd\n", len);
2485         memcpy(priv->ucode_code.v_addr, src, len);
2486         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2487                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2488
2489         /* Runtime data (2nd block)
2490          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2491         src = &ucode->data[inst_size];
2492         len = priv->ucode_data.len;
2493         IWL_DEBUG_INFO(priv,
2494                 "Copying (but not loading) uCode data len %zd\n", len);
2495         memcpy(priv->ucode_data.v_addr, src, len);
2496         memcpy(priv->ucode_data_backup.v_addr, src, len);
2497
2498         /* Initialization instructions (3rd block) */
2499         if (init_size) {
2500                 src = &ucode->data[inst_size + data_size];
2501                 len = priv->ucode_init.len;
2502                 IWL_DEBUG_INFO(priv,
2503                         "Copying (but not loading) init instr len %zd\n", len);
2504                 memcpy(priv->ucode_init.v_addr, src, len);
2505         }
2506
2507         /* Initialization data (4th block) */
2508         if (init_data_size) {
2509                 src = &ucode->data[inst_size + data_size + init_size];
2510                 len = priv->ucode_init_data.len;
2511                 IWL_DEBUG_INFO(priv,
2512                         "Copying (but not loading) init data len %zd\n", len);
2513                 memcpy(priv->ucode_init_data.v_addr, src, len);
2514         }
2515
2516         /* Bootstrap instructions (5th block) */
2517         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2518         len = priv->ucode_boot.len;
2519         IWL_DEBUG_INFO(priv,
2520                 "Copying (but not loading) boot instr len %zd\n", len);
2521         memcpy(priv->ucode_boot.v_addr, src, len);
2522
2523         /* We have our copies now, allow OS release its copies */
2524         release_firmware(ucode_raw);
2525         return 0;
2526
2527  err_pci_alloc:
2528         IWL_ERR(priv, "failed to allocate pci memory\n");
2529         ret = -ENOMEM;
2530         iwl3945_dealloc_ucode_pci(priv);
2531
2532  err_release:
2533         release_firmware(ucode_raw);
2534
2535  error:
2536         return ret;
2537 }
2538
2539
2540 /**
2541  * iwl3945_set_ucode_ptrs - Set uCode address location
2542  *
2543  * Tell initialization uCode where to find runtime uCode.
2544  *
2545  * BSM registers initially contain pointers to initialization uCode.
2546  * We need to replace them to load runtime uCode inst and data,
2547  * and to save runtime data when powering down.
2548  */
2549 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2550 {
2551         dma_addr_t pinst;
2552         dma_addr_t pdata;
2553         int rc = 0;
2554         unsigned long flags;
2555
2556         /* bits 31:0 for 3945 */
2557         pinst = priv->ucode_code.p_addr;
2558         pdata = priv->ucode_data_backup.p_addr;
2559
2560         spin_lock_irqsave(&priv->lock, flags);
2561         rc = iwl_grab_nic_access(priv);
2562         if (rc) {
2563                 spin_unlock_irqrestore(&priv->lock, flags);
2564                 return rc;
2565         }
2566
2567         /* Tell bootstrap uCode where to find image to load */
2568         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2569         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2570         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2571                                  priv->ucode_data.len);
2572
2573         /* Inst byte count must be last to set up, bit 31 signals uCode
2574          *   that all new ptr/size info is in place */
2575         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2576                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2577
2578         iwl_release_nic_access(priv);
2579
2580         spin_unlock_irqrestore(&priv->lock, flags);
2581
2582         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2583
2584         return rc;
2585 }
2586
2587 /**
2588  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2589  *
2590  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2591  *
2592  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2593  */
2594 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2595 {
2596         /* Check alive response for "valid" sign from uCode */
2597         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2598                 /* We had an error bringing up the hardware, so take it
2599                  * all the way back down so we can try again */
2600                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2601                 goto restart;
2602         }
2603
2604         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2605          * This is a paranoid check, because we would not have gotten the
2606          * "initialize" alive if code weren't properly loaded.  */
2607         if (iwl3945_verify_ucode(priv)) {
2608                 /* Runtime instruction load was bad;
2609                  * take it all the way back down so we can try again */
2610                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2611                 goto restart;
2612         }
2613
2614         /* Send pointers to protocol/runtime uCode image ... init code will
2615          * load and launch runtime uCode, which will send us another "Alive"
2616          * notification. */
2617         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2618         if (iwl3945_set_ucode_ptrs(priv)) {
2619                 /* Runtime instruction load won't happen;
2620                  * take it all the way back down so we can try again */
2621                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2622                 goto restart;
2623         }
2624         return;
2625
2626  restart:
2627         queue_work(priv->workqueue, &priv->restart);
2628 }
2629
2630 /**
2631  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2632  *                   from protocol/runtime uCode (initialization uCode's
2633  *                   Alive gets handled by iwl3945_init_alive_start()).
2634  */
2635 static void iwl3945_alive_start(struct iwl_priv *priv)
2636 {
2637         int rc = 0;
2638         int thermal_spin = 0;
2639         u32 rfkill;
2640
2641         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2642
2643         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2644                 /* We had an error bringing up the hardware, so take it
2645                  * all the way back down so we can try again */
2646                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2647                 goto restart;
2648         }
2649
2650         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2651          * This is a paranoid check, because we would not have gotten the
2652          * "runtime" alive if code weren't properly loaded.  */
2653         if (iwl3945_verify_ucode(priv)) {
2654                 /* Runtime instruction load was bad;
2655                  * take it all the way back down so we can try again */
2656                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2657                 goto restart;
2658         }
2659
2660         priv->cfg->ops->smgmt->clear_station_table(priv);
2661
2662         rc = iwl_grab_nic_access(priv);
2663         if (rc) {
2664                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
2665                 return;
2666         }
2667
2668         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2669         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2670         iwl_release_nic_access(priv);
2671
2672         if (rfkill & 0x1) {
2673                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2674                 /* if RFKILL is not on, then wait for thermal
2675                  * sensor in adapter to kick in */
2676                 while (iwl3945_hw_get_temperature(priv) == 0) {
2677                         thermal_spin++;
2678                         udelay(10);
2679                 }
2680
2681                 if (thermal_spin)
2682                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2683                                        thermal_spin * 10);
2684         } else
2685                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2686
2687         /* After the ALIVE response, we can send commands to 3945 uCode */
2688         set_bit(STATUS_ALIVE, &priv->status);
2689
2690         /* Clear out the uCode error bit if it is set */
2691         clear_bit(STATUS_FW_ERROR, &priv->status);
2692
2693         if (iwl_is_rfkill(priv))
2694                 return;
2695
2696         ieee80211_wake_queues(priv->hw);
2697
2698         priv->active_rate = priv->rates_mask;
2699         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2700
2701         iwl_power_update_mode(priv, false);
2702
2703         if (iwl_is_associated(priv)) {
2704                 struct iwl3945_rxon_cmd *active_rxon =
2705                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2706
2707                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2708                        sizeof(priv->staging_rxon));
2709                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2710         } else {
2711                 /* Initialize our rx_config data */
2712                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2713         }
2714
2715         /* Configure Bluetooth device coexistence support */
2716         iwl_send_bt_config(priv);
2717
2718         /* Configure the adapter for unassociated operation */
2719         iwlcore_commit_rxon(priv);
2720
2721         iwl3945_reg_txpower_periodic(priv);
2722
2723         iwl3945_led_register(priv);
2724
2725         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2726         set_bit(STATUS_READY, &priv->status);
2727         wake_up_interruptible(&priv->wait_command_queue);
2728
2729         if (priv->error_recovering)
2730                 iwl3945_error_recovery(priv);
2731
2732         /* reassociate for ADHOC mode */
2733         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2734                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2735                                                                 priv->vif);
2736                 if (beacon)
2737                         iwl_mac_beacon_update(priv->hw, beacon);
2738         }
2739
2740         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2741                 iwl_set_mode(priv, priv->iw_mode);
2742
2743         return;
2744
2745  restart:
2746         queue_work(priv->workqueue, &priv->restart);
2747 }
2748
2749 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2750
2751 static void __iwl3945_down(struct iwl_priv *priv)
2752 {
2753         unsigned long flags;
2754         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2755         struct ieee80211_conf *conf = NULL;
2756
2757         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2758
2759         conf = ieee80211_get_hw_conf(priv->hw);
2760
2761         if (!exit_pending)
2762                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2763
2764         iwl3945_led_unregister(priv);
2765         priv->cfg->ops->smgmt->clear_station_table(priv);
2766
2767         /* Unblock any waiting calls */
2768         wake_up_interruptible_all(&priv->wait_command_queue);
2769
2770         /* Wipe out the EXIT_PENDING status bit if we are not actually
2771          * exiting the module */
2772         if (!exit_pending)
2773                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2774
2775         /* stop and reset the on-board processor */
2776         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2777
2778         /* tell the device to stop sending interrupts */
2779         spin_lock_irqsave(&priv->lock, flags);
2780         iwl_disable_interrupts(priv);
2781         spin_unlock_irqrestore(&priv->lock, flags);
2782         iwl_synchronize_irq(priv);
2783
2784         if (priv->mac80211_registered)
2785                 ieee80211_stop_queues(priv->hw);
2786
2787         /* If we have not previously called iwl3945_init() then
2788          * clear all bits but the RF Kill bits and return */
2789         if (!iwl_is_init(priv)) {
2790                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2791                                         STATUS_RF_KILL_HW |
2792                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2793                                         STATUS_RF_KILL_SW |
2794                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2795                                         STATUS_GEO_CONFIGURED |
2796                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2797                                         STATUS_EXIT_PENDING;
2798                 goto exit;
2799         }
2800
2801         /* ...otherwise clear out all the status bits but the RF Kill
2802          * bits and continue taking the NIC down. */
2803         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2804                                 STATUS_RF_KILL_HW |
2805                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2806                                 STATUS_RF_KILL_SW |
2807                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2808                                 STATUS_GEO_CONFIGURED |
2809                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2810                                 STATUS_FW_ERROR |
2811                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2812                                 STATUS_EXIT_PENDING;
2813
2814         priv->cfg->ops->lib->apm_ops.reset(priv);
2815         spin_lock_irqsave(&priv->lock, flags);
2816         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2817         spin_unlock_irqrestore(&priv->lock, flags);
2818
2819         iwl3945_hw_txq_ctx_stop(priv);
2820         iwl3945_hw_rxq_stop(priv);
2821
2822         spin_lock_irqsave(&priv->lock, flags);
2823         if (!iwl_grab_nic_access(priv)) {
2824                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2825                                          APMG_CLK_VAL_DMA_CLK_RQT);
2826                 iwl_release_nic_access(priv);
2827         }
2828         spin_unlock_irqrestore(&priv->lock, flags);
2829
2830         udelay(5);
2831
2832         if (exit_pending)
2833                 priv->cfg->ops->lib->apm_ops.stop(priv);
2834         else
2835                 priv->cfg->ops->lib->apm_ops.reset(priv);
2836
2837  exit:
2838         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2839
2840         if (priv->ibss_beacon)
2841                 dev_kfree_skb(priv->ibss_beacon);
2842         priv->ibss_beacon = NULL;
2843
2844         /* clear out any free frames */
2845         iwl3945_clear_free_frames(priv);
2846 }
2847
2848 static void iwl3945_down(struct iwl_priv *priv)
2849 {
2850         mutex_lock(&priv->mutex);
2851         __iwl3945_down(priv);
2852         mutex_unlock(&priv->mutex);
2853
2854         iwl3945_cancel_deferred_work(priv);
2855 }
2856
2857 #define MAX_HW_RESTARTS 5
2858
2859 static int __iwl3945_up(struct iwl_priv *priv)
2860 {
2861         int rc, i;
2862
2863         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2864                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2865                 return -EIO;
2866         }
2867
2868         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
2869                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
2870                             "parameter)\n");
2871                 return -ENODEV;
2872         }
2873
2874         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2875                 IWL_ERR(priv, "ucode not available for device bring up\n");
2876                 return -EIO;
2877         }
2878
2879         /* If platform's RF_KILL switch is NOT set to KILL */
2880         if (iwl_read32(priv, CSR_GP_CNTRL) &
2881                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2882                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2883         else {
2884                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2885                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2886                 return -ENODEV;
2887         }
2888
2889         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2890
2891         rc = iwl3945_hw_nic_init(priv);
2892         if (rc) {
2893                 IWL_ERR(priv, "Unable to int nic\n");
2894                 return rc;
2895         }
2896
2897         /* make sure rfkill handshake bits are cleared */
2898         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2899         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2900                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2901
2902         /* clear (again), then enable host interrupts */
2903         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2904         iwl_enable_interrupts(priv);
2905
2906         /* really make sure rfkill handshake bits are cleared */
2907         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2908         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2909
2910         /* Copy original ucode data image from disk into backup cache.
2911          * This will be used to initialize the on-board processor's
2912          * data SRAM for a clean start when the runtime program first loads. */
2913         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2914                priv->ucode_data.len);
2915
2916         /* We return success when we resume from suspend and rf_kill is on. */
2917         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2918                 return 0;
2919
2920         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2921
2922                 priv->cfg->ops->smgmt->clear_station_table(priv);
2923
2924                 /* load bootstrap state machine,
2925                  * load bootstrap program into processor's memory,
2926                  * prepare to load the "initialize" uCode */
2927                 priv->cfg->ops->lib->load_ucode(priv);
2928
2929                 if (rc) {
2930                         IWL_ERR(priv,
2931                                 "Unable to set up bootstrap uCode: %d\n", rc);
2932                         continue;
2933                 }
2934
2935                 /* start card; "initialize" will load runtime ucode */
2936                 iwl3945_nic_start(priv);
2937
2938                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2939
2940                 return 0;
2941         }
2942
2943         set_bit(STATUS_EXIT_PENDING, &priv->status);
2944         __iwl3945_down(priv);
2945         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2946
2947         /* tried to restart and config the device for as long as our
2948          * patience could withstand */
2949         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2950         return -EIO;
2951 }
2952
2953
2954 /*****************************************************************************
2955  *
2956  * Workqueue callbacks
2957  *
2958  *****************************************************************************/
2959
2960 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2961 {
2962         struct iwl_priv *priv =
2963             container_of(data, struct iwl_priv, init_alive_start.work);
2964
2965         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2966                 return;
2967
2968         mutex_lock(&priv->mutex);
2969         iwl3945_init_alive_start(priv);
2970         mutex_unlock(&priv->mutex);
2971 }
2972
2973 static void iwl3945_bg_alive_start(struct work_struct *data)
2974 {
2975         struct iwl_priv *priv =
2976             container_of(data, struct iwl_priv, alive_start.work);
2977
2978         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2979                 return;
2980
2981         mutex_lock(&priv->mutex);
2982         iwl3945_alive_start(priv);
2983         mutex_unlock(&priv->mutex);
2984 }
2985
2986 static void iwl3945_rfkill_poll(struct work_struct *data)
2987 {
2988         struct iwl_priv *priv =
2989             container_of(data, struct iwl_priv, rfkill_poll.work);
2990         unsigned long status = priv->status;
2991
2992         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2993                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2994         else
2995                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2996
2997         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
2998                 queue_work(priv->workqueue, &priv->rf_kill);
2999
3000         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3001                            round_jiffies_relative(2 * HZ));
3002
3003 }
3004
3005 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3006 static void iwl3945_bg_request_scan(struct work_struct *data)
3007 {
3008         struct iwl_priv *priv =
3009             container_of(data, struct iwl_priv, request_scan);
3010         struct iwl_host_cmd cmd = {
3011                 .id = REPLY_SCAN_CMD,
3012                 .len = sizeof(struct iwl3945_scan_cmd),
3013                 .meta.flags = CMD_SIZE_HUGE,
3014         };
3015         int rc = 0;
3016         struct iwl3945_scan_cmd *scan;
3017         struct ieee80211_conf *conf = NULL;
3018         u8 n_probes = 0;
3019         enum ieee80211_band band;
3020         bool is_active = false;
3021
3022         conf = ieee80211_get_hw_conf(priv->hw);
3023
3024         mutex_lock(&priv->mutex);
3025
3026         if (!iwl_is_ready(priv)) {
3027                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3028                 goto done;
3029         }
3030
3031         /* Make sure the scan wasn't canceled before this queued work
3032          * was given the chance to run... */
3033         if (!test_bit(STATUS_SCANNING, &priv->status))
3034                 goto done;
3035
3036         /* This should never be called or scheduled if there is currently
3037          * a scan active in the hardware. */
3038         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3039                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
3040                                 "Ignoring second request.\n");
3041                 rc = -EIO;
3042                 goto done;
3043         }
3044
3045         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3046                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
3047                 goto done;
3048         }
3049
3050         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3051                 IWL_DEBUG_HC(priv,
3052                         "Scan request while abort pending. Queuing.\n");
3053                 goto done;
3054         }
3055
3056         if (iwl_is_rfkill(priv)) {
3057                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
3058                 goto done;
3059         }
3060
3061         if (!test_bit(STATUS_READY, &priv->status)) {
3062                 IWL_DEBUG_HC(priv,
3063                         "Scan request while uninitialized. Queuing.\n");
3064                 goto done;
3065         }
3066
3067         if (!priv->scan_bands) {
3068                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
3069                 goto done;
3070         }
3071
3072         if (!priv->scan) {
3073                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3074                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3075                 if (!priv->scan) {
3076                         rc = -ENOMEM;
3077                         goto done;
3078                 }
3079         }
3080         scan = priv->scan;
3081         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3082
3083         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3084         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3085
3086         if (iwl_is_associated(priv)) {
3087                 u16 interval = 0;
3088                 u32 extra;
3089                 u32 suspend_time = 100;
3090                 u32 scan_suspend_time = 100;
3091                 unsigned long flags;
3092
3093                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
3094
3095                 spin_lock_irqsave(&priv->lock, flags);
3096                 interval = priv->beacon_int;
3097                 spin_unlock_irqrestore(&priv->lock, flags);
3098
3099                 scan->suspend_time = 0;
3100                 scan->max_out_time = cpu_to_le32(200 * 1024);
3101                 if (!interval)
3102                         interval = suspend_time;
3103                 /*
3104                  * suspend time format:
3105                  *  0-19: beacon interval in usec (time before exec.)
3106                  * 20-23: 0
3107                  * 24-31: number of beacons (suspend between channels)
3108                  */
3109
3110                 extra = (suspend_time / interval) << 24;
3111                 scan_suspend_time = 0xFF0FFFFF &
3112                     (extra | ((suspend_time % interval) * 1024));
3113
3114                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3115                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
3116                                scan_suspend_time, interval);
3117         }
3118
3119         if (priv->scan_request->n_ssids) {
3120                 int i, p = 0;
3121                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
3122                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
3123                         /* always does wildcard anyway */
3124                         if (!priv->scan_request->ssids[i].ssid_len)
3125                                 continue;
3126                         scan->direct_scan[p].id = WLAN_EID_SSID;
3127                         scan->direct_scan[p].len =
3128                                 priv->scan_request->ssids[i].ssid_len;
3129                         memcpy(scan->direct_scan[p].ssid,
3130                                priv->scan_request->ssids[i].ssid,
3131                                priv->scan_request->ssids[i].ssid_len);
3132                         n_probes++;
3133                         p++;
3134                 }
3135                 is_active = true;
3136         } else
3137                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
3138
3139         /* We don't build a direct scan probe request; the uCode will do
3140          * that based on the direct_mask added to each channel entry */
3141         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3142         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3143         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3144
3145         /* flags + rate selection */
3146
3147         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3148                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3149                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3150                 scan->good_CRC_th = 0;
3151                 band = IEEE80211_BAND_2GHZ;
3152         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3153                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3154                 /*
3155                  * If active scaning is requested but a certain channel
3156                  * is marked passive, we can do active scanning if we
3157                  * detect transmissions.
3158                  */
3159                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
3160                 band = IEEE80211_BAND_5GHZ;
3161         } else {
3162                 IWL_WARN(priv, "Invalid scan band count\n");
3163                 goto done;
3164         }
3165
3166         scan->tx_cmd.len = cpu_to_le16(
3167                         iwl_fill_probe_req(priv,
3168                                 (struct ieee80211_mgmt *)scan->data,
3169                                 priv->scan_request->ie,
3170                                 priv->scan_request->ie_len,
3171                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3172
3173         /* select Rx antennas */
3174         scan->flags |= iwl3945_get_antenna_flags(priv);
3175
3176         if (iwl_is_monitor_mode(priv))
3177                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3178
3179         scan->channel_count =
3180                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3181                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3182
3183         if (scan->channel_count == 0) {
3184                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3185                 goto done;
3186         }
3187
3188         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3189             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3190         cmd.data = scan;
3191         scan->len = cpu_to_le16(cmd.len);
3192
3193         set_bit(STATUS_SCAN_HW, &priv->status);
3194         rc = iwl_send_cmd_sync(priv, &cmd);
3195         if (rc)
3196                 goto done;
3197
3198         queue_delayed_work(priv->workqueue, &priv->scan_check,
3199                            IWL_SCAN_CHECK_WATCHDOG);
3200
3201         mutex_unlock(&priv->mutex);
3202         return;
3203
3204  done:
3205         /* can not perform scan make sure we clear scanning
3206          * bits from status so next scan request can be performed.
3207          * if we dont clear scanning status bit here all next scan
3208          * will fail
3209         */
3210         clear_bit(STATUS_SCAN_HW, &priv->status);
3211         clear_bit(STATUS_SCANNING, &priv->status);
3212
3213         /* inform mac80211 scan aborted */
3214         queue_work(priv->workqueue, &priv->scan_completed);
3215         mutex_unlock(&priv->mutex);
3216 }
3217
3218 static void iwl3945_bg_up(struct work_struct *data)
3219 {
3220         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3221
3222         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3223                 return;
3224
3225         mutex_lock(&priv->mutex);
3226         __iwl3945_up(priv);
3227         mutex_unlock(&priv->mutex);
3228         iwl_rfkill_set_hw_state(priv);
3229 }
3230
3231 static void iwl3945_bg_restart(struct work_struct *data)
3232 {
3233         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3234
3235         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3236                 return;
3237
3238         iwl3945_down(priv);
3239         queue_work(priv->workqueue, &priv->up);
3240 }
3241
3242 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3243 {
3244         struct iwl_priv *priv =
3245             container_of(data, struct iwl_priv, rx_replenish);
3246
3247         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3248                 return;
3249
3250         mutex_lock(&priv->mutex);
3251         iwl3945_rx_replenish(priv);
3252         mutex_unlock(&priv->mutex);
3253 }
3254
3255 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3256
3257 void iwl3945_post_associate(struct iwl_priv *priv)
3258 {
3259         int rc = 0;
3260         struct ieee80211_conf *conf = NULL;
3261
3262         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3263                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3264                 return;
3265         }
3266
3267
3268         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3269                         priv->assoc_id, priv->active_rxon.bssid_addr);
3270
3271         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3272                 return;
3273
3274         if (!priv->vif || !priv->is_open)
3275                 return;
3276
3277         iwl_scan_cancel_timeout(priv, 200);
3278
3279         conf = ieee80211_get_hw_conf(priv->hw);
3280
3281         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3282         iwlcore_commit_rxon(priv);
3283
3284         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3285         iwl3945_setup_rxon_timing(priv);
3286         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3287                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3288         if (rc)
3289                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3290                             "Attempting to continue.\n");
3291
3292         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3293
3294         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3295
3296         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3297                         priv->assoc_id, priv->beacon_int);
3298
3299         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3300                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3301         else
3302                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3303
3304         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3305                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3306                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3307                 else
3308                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3309
3310                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3311                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3312
3313         }
3314
3315         iwlcore_commit_rxon(priv);
3316
3317         switch (priv->iw_mode) {
3318         case NL80211_IFTYPE_STATION:
3319                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3320                 break;
3321
3322         case NL80211_IFTYPE_ADHOC:
3323
3324                 priv->assoc_id = 1;
3325                 priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 0, 0, NULL);
3326                 iwl3945_sync_sta(priv, IWL_STA_ID,
3327                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3328                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3329                                  CMD_ASYNC);
3330                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3331                 iwl3945_send_beacon_cmd(priv);
3332
3333                 break;
3334
3335         default:
3336                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3337                            __func__, priv->iw_mode);
3338                 break;
3339         }
3340
3341         iwl_activate_qos(priv, 0);
3342
3343         /* we have just associated, don't start scan too early */
3344         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3345 }
3346
3347 /*****************************************************************************
3348  *
3349  * mac80211 entry point functions
3350  *
3351  *****************************************************************************/
3352
3353 #define UCODE_READY_TIMEOUT     (2 * HZ)
3354
3355 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3356 {
3357         struct iwl_priv *priv = hw->priv;
3358         int ret;
3359
3360         IWL_DEBUG_MAC80211(priv, "enter\n");
3361
3362         /* we should be verifying the device is ready to be opened */
3363         mutex_lock(&priv->mutex);
3364
3365         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
3366         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3367          * ucode filename and max sizes are card-specific. */
3368
3369         if (!priv->ucode_code.len) {
3370                 ret = iwl3945_read_ucode(priv);
3371                 if (ret) {
3372                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3373                         mutex_unlock(&priv->mutex);
3374                         goto out_release_irq;
3375                 }
3376         }
3377
3378         ret = __iwl3945_up(priv);
3379
3380         mutex_unlock(&priv->mutex);
3381
3382         iwl_rfkill_set_hw_state(priv);
3383
3384         if (ret)
3385                 goto out_release_irq;
3386
3387         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3388
3389         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3390          * mac80211 will not be run successfully. */
3391         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3392                         test_bit(STATUS_READY, &priv->status),
3393                         UCODE_READY_TIMEOUT);
3394         if (!ret) {
3395                 if (!test_bit(STATUS_READY, &priv->status)) {
3396                         IWL_ERR(priv,
3397                                 "Wait for START_ALIVE timeout after %dms.\n",
3398                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3399                         ret = -ETIMEDOUT;
3400                         goto out_release_irq;
3401                 }
3402         }
3403
3404         /* ucode is running and will send rfkill notifications,
3405          * no need to poll the killswitch state anymore */
3406         cancel_delayed_work(&priv->rfkill_poll);
3407
3408         priv->is_open = 1;
3409         IWL_DEBUG_MAC80211(priv, "leave\n");
3410         return 0;
3411
3412 out_release_irq:
3413         priv->is_open = 0;
3414         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3415         return ret;
3416 }
3417
3418 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3419 {
3420         struct iwl_priv *priv = hw->priv;
3421
3422         IWL_DEBUG_MAC80211(priv, "enter\n");
3423
3424         if (!priv->is_open) {
3425                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3426                 return;
3427         }
3428
3429         priv->is_open = 0;
3430
3431         if (iwl_is_ready_rf(priv)) {
3432                 /* stop mac, cancel any scan request and clear
3433                  * RXON_FILTER_ASSOC_MSK BIT
3434                  */
3435                 mutex_lock(&priv->mutex);
3436                 iwl_scan_cancel_timeout(priv, 100);
3437                 mutex_unlock(&priv->mutex);
3438         }
3439
3440         iwl3945_down(priv);
3441
3442         flush_workqueue(priv->workqueue);
3443
3444         /* start polling the killswitch state again */
3445         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3446                            round_jiffies_relative(2 * HZ));
3447
3448         IWL_DEBUG_MAC80211(priv, "leave\n");
3449 }
3450
3451 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3452 {
3453         struct iwl_priv *priv = hw->priv;
3454
3455         IWL_DEBUG_MAC80211(priv, "enter\n");
3456
3457         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3458                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3459
3460         if (iwl3945_tx_skb(priv, skb))
3461                 dev_kfree_skb_any(skb);
3462
3463         IWL_DEBUG_MAC80211(priv, "leave\n");
3464         return NETDEV_TX_OK;
3465 }
3466
3467 void iwl3945_config_ap(struct iwl_priv *priv)
3468 {
3469         int rc = 0;
3470
3471         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3472                 return;
3473
3474         /* The following should be done only at AP bring up */
3475         if (!(iwl_is_associated(priv))) {
3476
3477                 /* RXON - unassoc (to set timing command) */
3478                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3479                 iwlcore_commit_rxon(priv);
3480
3481                 /* RXON Timing */
3482                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3483                 iwl3945_setup_rxon_timing(priv);
3484                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3485                                       sizeof(priv->rxon_timing),
3486                                       &priv->rxon_timing);
3487                 if (rc)
3488                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3489                                         "Attempting to continue.\n");
3490
3491                 /* FIXME: what should be the assoc_id for AP? */
3492                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3493                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3494                         priv->staging_rxon.flags |=
3495                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3496                 else
3497                         priv->staging_rxon.flags &=
3498                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3499
3500                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3501                         if (priv->assoc_capability &
3502                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3503                                 priv->staging_rxon.flags |=
3504                                         RXON_FLG_SHORT_SLOT_MSK;
3505                         else
3506                                 priv->staging_rxon.flags &=
3507                                         ~RXON_FLG_SHORT_SLOT_MSK;
3508
3509                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3510                                 priv->staging_rxon.flags &=
3511                                         ~RXON_FLG_SHORT_SLOT_MSK;
3512                 }
3513                 /* restore RXON assoc */
3514                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3515                 iwlcore_commit_rxon(priv);
3516                 priv->cfg->ops->smgmt->add_station(priv, iwl_bcast_addr, 0, 0, NULL);
3517         }
3518         iwl3945_send_beacon_cmd(priv);
3519
3520         /* FIXME - we need to add code here to detect a totally new
3521          * configuration, reset the AP, unassoc, rxon timing, assoc,
3522          * clear sta table, add BCAST sta... */
3523 }
3524
3525 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3526                                struct ieee80211_vif *vif,
3527                                struct ieee80211_sta *sta,
3528                                struct ieee80211_key_conf *key)
3529 {
3530         struct iwl_priv *priv = hw->priv;
3531         const u8 *addr;
3532         int ret = 0;
3533         u8 sta_id = IWL_INVALID_STATION;
3534         u8 static_key;
3535
3536         IWL_DEBUG_MAC80211(priv, "enter\n");
3537
3538         if (iwl3945_mod_params.sw_crypto) {
3539                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3540                 return -EOPNOTSUPP;
3541         }
3542
3543         addr = sta ? sta->addr : iwl_bcast_addr;
3544         static_key = !iwl_is_associated(priv);
3545
3546         if (!static_key) {
3547                 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
3548                 if (sta_id == IWL_INVALID_STATION) {
3549                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3550                                             addr);
3551                         return -EINVAL;
3552                 }
3553         }
3554
3555         mutex_lock(&priv->mutex);
3556         iwl_scan_cancel_timeout(priv, 100);
3557         mutex_unlock(&priv->mutex);
3558
3559         switch (cmd) {
3560         case SET_KEY:
3561                 if (static_key)
3562                         ret = iwl3945_set_static_key(priv, key);
3563                 else
3564                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3565                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3566                 break;
3567         case DISABLE_KEY:
3568                 if (static_key)
3569                         ret = iwl3945_remove_static_key(priv);
3570                 else
3571                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3572                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3573                 break;
3574         default:
3575                 ret = -EINVAL;
3576         }
3577
3578         IWL_DEBUG_MAC80211(priv, "leave\n");
3579
3580         return ret;
3581 }
3582
3583 /*****************************************************************************
3584  *
3585  * sysfs attributes
3586  *
3587  *****************************************************************************/
3588
3589 #ifdef CONFIG_IWLWIFI_DEBUG
3590
3591 /*
3592  * The following adds a new attribute to the sysfs representation
3593  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3594  * used for controlling the debug level.
3595  *
3596  * See the level definitions in iwl for details.
3597  */
3598 static ssize_t show_debug_level(struct device *d,
3599                                 struct device_attribute *attr, char *buf)
3600 {
3601         struct iwl_priv *priv = d->driver_data;
3602
3603         return sprintf(buf, "0x%08X\n", priv->debug_level);
3604 }
3605 static ssize_t store_debug_level(struct device *d,
3606                                 struct device_attribute *attr,
3607                                  const char *buf, size_t count)
3608 {
3609         struct iwl_priv *priv = d->driver_data;
3610         unsigned long val;
3611         int ret;
3612
3613         ret = strict_strtoul(buf, 0, &val);
3614         if (ret)
3615                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3616         else
3617                 priv->debug_level = val;
3618
3619         return strnlen(buf, count);
3620 }
3621
3622 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3623                         show_debug_level, store_debug_level);
3624
3625 #endif /* CONFIG_IWLWIFI_DEBUG */
3626
3627 static ssize_t show_temperature(struct device *d,
3628                                 struct device_attribute *attr, char *buf)
3629 {
3630         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3631
3632         if (!iwl_is_alive(priv))
3633                 return -EAGAIN;
3634
3635         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3636 }
3637
3638 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3639
3640 static ssize_t show_tx_power(struct device *d,
3641                              struct device_attribute *attr, char *buf)
3642 {
3643         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3644         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3645 }
3646
3647 static ssize_t store_tx_power(struct device *d,
3648                               struct device_attribute *attr,
3649                               const char *buf, size_t count)
3650 {
3651         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3652         char *p = (char *)buf;
3653         u32 val;
3654
3655         val = simple_strtoul(p, &p, 10);
3656         if (p == buf)
3657                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3658         else
3659                 iwl3945_hw_reg_set_txpower(priv, val);
3660
3661         return count;
3662 }
3663
3664 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3665
3666 static ssize_t show_flags(struct device *d,
3667                           struct device_attribute *attr, char *buf)
3668 {
3669         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3670
3671         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3672 }
3673
3674 static ssize_t store_flags(struct device *d,
3675                            struct device_attribute *attr,
3676                            const char *buf, size_t count)
3677 {
3678         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3679         u32 flags = simple_strtoul(buf, NULL, 0);
3680
3681         mutex_lock(&priv->mutex);
3682         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3683                 /* Cancel any currently running scans... */
3684                 if (iwl_scan_cancel_timeout(priv, 100))
3685                         IWL_WARN(priv, "Could not cancel scan.\n");
3686                 else {
3687                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3688                                        flags);
3689                         priv->staging_rxon.flags = cpu_to_le32(flags);
3690                         iwlcore_commit_rxon(priv);
3691                 }
3692         }
3693         mutex_unlock(&priv->mutex);
3694
3695         return count;
3696 }
3697
3698 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3699
3700 static ssize_t show_filter_flags(struct device *d,
3701                                  struct device_attribute *attr, char *buf)
3702 {
3703         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3704
3705         return sprintf(buf, "0x%04X\n",
3706                 le32_to_cpu(priv->active_rxon.filter_flags));
3707 }
3708
3709 static ssize_t store_filter_flags(struct device *d,
3710                                   struct device_attribute *attr,
3711                                   const char *buf, size_t count)
3712 {
3713         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3714         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3715
3716         mutex_lock(&priv->mutex);
3717         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3718                 /* Cancel any currently running scans... */
3719                 if (iwl_scan_cancel_timeout(priv, 100))
3720                         IWL_WARN(priv, "Could not cancel scan.\n");
3721                 else {
3722                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3723                                        "0x%04X\n", filter_flags);
3724                         priv->staging_rxon.filter_flags =
3725                                 cpu_to_le32(filter_flags);
3726                         iwlcore_commit_rxon(priv);
3727                 }
3728         }
3729         mutex_unlock(&priv->mutex);
3730
3731         return count;
3732 }
3733
3734 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3735                    store_filter_flags);
3736
3737 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3738
3739 static ssize_t show_measurement(struct device *d,
3740                                 struct device_attribute *attr, char *buf)
3741 {
3742         struct iwl_priv *priv = dev_get_drvdata(d);
3743         struct iwl_spectrum_notification measure_report;
3744         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3745         u8 *data = (u8 *)&measure_report;
3746         unsigned long flags;
3747
3748         spin_lock_irqsave(&priv->lock, flags);
3749         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3750                 spin_unlock_irqrestore(&priv->lock, flags);
3751                 return 0;
3752         }
3753         memcpy(&measure_report, &priv->measure_report, size);
3754         priv->measurement_status = 0;
3755         spin_unlock_irqrestore(&priv->lock, flags);
3756
3757         while (size && (PAGE_SIZE - len)) {
3758                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3759                                    PAGE_SIZE - len, 1);
3760                 len = strlen(buf);
3761                 if (PAGE_SIZE - len)
3762                         buf[len++] = '\n';
3763
3764                 ofs += 16;
3765                 size -= min(size, 16U);
3766         }
3767
3768         return len;
3769 }
3770
3771 static ssize_t store_measurement(struct device *d,
3772                                  struct device_attribute *attr,
3773                                  const char *buf, size_t count)
3774 {
3775         struct iwl_priv *priv = dev_get_drvdata(d);
3776         struct ieee80211_measurement_params params = {
3777                 .channel = le16_to_cpu(priv->active_rxon.channel),
3778                 .start_time = cpu_to_le64(priv->last_tsf),
3779                 .duration = cpu_to_le16(1),
3780         };
3781         u8 type = IWL_MEASURE_BASIC;
3782         u8 buffer[32];
3783         u8 channel;
3784
3785         if (count) {
3786                 char *p = buffer;
3787                 strncpy(buffer, buf, min(sizeof(buffer), count));
3788                 channel = simple_strtoul(p, NULL, 0);
3789                 if (channel)
3790                         params.channel = channel;
3791
3792                 p = buffer;
3793                 while (*p && *p != ' ')
3794                         p++;
3795                 if (*p)
3796                         type = simple_strtoul(p + 1, NULL, 0);
3797         }
3798
3799         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3800                        "channel %d (for '%s')\n", type, params.channel, buf);
3801         iwl3945_get_measurement(priv, &params, type);
3802
3803         return count;
3804 }
3805
3806 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3807                    show_measurement, store_measurement);
3808 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3809
3810 static ssize_t store_retry_rate(struct device *d,
3811                                 struct device_attribute *attr,
3812                                 const char *buf, size_t count)
3813 {
3814         struct iwl_priv *priv = dev_get_drvdata(d);
3815
3816         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3817         if (priv->retry_rate <= 0)
3818                 priv->retry_rate = 1;
3819
3820         return count;
3821 }
3822
3823 static ssize_t show_retry_rate(struct device *d,
3824                                struct device_attribute *attr, char *buf)
3825 {
3826         struct iwl_priv *priv = dev_get_drvdata(d);
3827         return sprintf(buf, "%d", priv->retry_rate);
3828 }
3829
3830 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3831                    store_retry_rate);
3832
3833
3834 static ssize_t store_power_level(struct device *d,
3835                                  struct device_attribute *attr,
3836                                  const char *buf, size_t count)
3837 {
3838         struct iwl_priv *priv = dev_get_drvdata(d);
3839         int ret;
3840         unsigned long mode;
3841
3842
3843         mutex_lock(&priv->mutex);
3844
3845         ret = strict_strtoul(buf, 10, &mode);
3846         if (ret)
3847                 goto out;
3848
3849         ret = iwl_power_set_user_mode(priv, mode);
3850         if (ret) {
3851                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3852                 goto out;
3853         }
3854         ret = count;
3855
3856  out:
3857         mutex_unlock(&priv->mutex);
3858         return ret;
3859 }
3860
3861 static ssize_t show_power_level(struct device *d,
3862                                 struct device_attribute *attr, char *buf)
3863 {
3864         struct iwl_priv *priv = dev_get_drvdata(d);
3865         int mode = priv->power_data.user_power_setting;
3866         int system = priv->power_data.system_power_setting;
3867         int level = priv->power_data.power_mode;
3868         char *p = buf;
3869
3870         switch (system) {
3871         case IWL_POWER_SYS_AUTO:
3872                 p += sprintf(p, "SYSTEM:auto");
3873                 break;
3874         case IWL_POWER_SYS_AC:
3875                 p += sprintf(p, "SYSTEM:ac");
3876                 break;
3877         case IWL_POWER_SYS_BATTERY:
3878                 p += sprintf(p, "SYSTEM:battery");
3879                 break;
3880         }
3881
3882         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3883                         "fixed" : "auto");
3884         p += sprintf(p, "\tINDEX:%d", level);
3885         p += sprintf(p, "\n");
3886         return p - buf + 1;
3887 }
3888
3889 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3890                    show_power_level, store_power_level);
3891
3892 #define MAX_WX_STRING 80
3893
3894 /* Values are in microsecond */
3895 static const s32 timeout_duration[] = {
3896         350000,
3897         250000,
3898         75000,
3899         37000,
3900         25000,
3901 };
3902 static const s32 period_duration[] = {
3903         400000,
3904         700000,
3905         1000000,
3906         1000000,
3907         1000000
3908 };
3909
3910 static ssize_t show_channels(struct device *d,
3911                              struct device_attribute *attr, char *buf)
3912 {
3913         /* all this shit doesn't belong into sysfs anyway */
3914         return 0;
3915 }
3916
3917 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3918
3919 static ssize_t show_statistics(struct device *d,
3920                                struct device_attribute *attr, char *buf)
3921 {
3922         struct iwl_priv *priv = dev_get_drvdata(d);
3923         u32 size = sizeof(struct iwl3945_notif_statistics);
3924         u32 len = 0, ofs = 0;
3925         u8 *data = (u8 *)&priv->statistics_39;
3926         int rc = 0;
3927
3928         if (!iwl_is_alive(priv))
3929                 return -EAGAIN;
3930
3931         mutex_lock(&priv->mutex);
3932         rc = iwl_send_statistics_request(priv, 0);
3933         mutex_unlock(&priv->mutex);
3934
3935         if (rc) {
3936                 len = sprintf(buf,
3937                               "Error sending statistics request: 0x%08X\n", rc);
3938                 return len;
3939         }
3940
3941         while (size && (PAGE_SIZE - len)) {
3942                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3943                                    PAGE_SIZE - len, 1);
3944                 len = strlen(buf);
3945                 if (PAGE_SIZE - len)
3946                         buf[len++] = '\n';
3947
3948                 ofs += 16;
3949                 size -= min(size, 16U);
3950         }
3951
3952         return len;
3953 }
3954
3955 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3956
3957 static ssize_t show_antenna(struct device *d,
3958                             struct device_attribute *attr, char *buf)
3959 {
3960         struct iwl_priv *priv = dev_get_drvdata(d);
3961
3962         if (!iwl_is_alive(priv))
3963                 return -EAGAIN;
3964
3965         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3966 }
3967
3968 static ssize_t store_antenna(struct device *d,
3969                              struct device_attribute *attr,
3970                              const char *buf, size_t count)
3971 {
3972         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3973         int ant;
3974
3975         if (count == 0)
3976                 return 0;
3977
3978         if (sscanf(buf, "%1i", &ant) != 1) {
3979                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3980                 return count;
3981         }
3982
3983         if ((ant >= 0) && (ant <= 2)) {
3984                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3985                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3986         } else
3987                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3988
3989
3990         return count;
3991 }
3992
3993 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3994
3995 static ssize_t show_status(struct device *d,
3996                            struct device_attribute *attr, char *buf)
3997 {
3998         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3999         if (!iwl_is_alive(priv))
4000                 return -EAGAIN;
4001         return sprintf(buf, "0x%08x\n", (int)priv->status);
4002 }
4003
4004 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4005
4006 static ssize_t dump_error_log(struct device *d,
4007                               struct device_attribute *attr,
4008                               const char *buf, size_t count)
4009 {
4010         char *p = (char *)buf;
4011
4012         if (p[0] == '1')
4013                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
4014
4015         return strnlen(buf, count);
4016 }
4017
4018 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
4019
4020 static ssize_t dump_event_log(struct device *d,
4021                               struct device_attribute *attr,
4022                               const char *buf, size_t count)
4023 {
4024         char *p = (char *)buf;
4025
4026         if (p[0] == '1')
4027                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
4028
4029         return strnlen(buf, count);
4030 }
4031
4032 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
4033
4034 /*****************************************************************************
4035  *
4036  * driver setup and tear down
4037  *
4038  *****************************************************************************/
4039
4040 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
4041 {
4042         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
4043
4044         init_waitqueue_head(&priv->wait_command_queue);
4045
4046         INIT_WORK(&priv->up, iwl3945_bg_up);
4047         INIT_WORK(&priv->restart, iwl3945_bg_restart);
4048         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
4049         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4050         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
4051         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
4052         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
4053         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
4054         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
4055         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
4056         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
4057         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
4058
4059         iwl3945_hw_setup_deferred_work(priv);
4060
4061         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4062                      iwl3945_irq_tasklet, (unsigned long)priv);
4063 }
4064
4065 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
4066 {
4067         iwl3945_hw_cancel_deferred_work(priv);
4068
4069         cancel_delayed_work_sync(&priv->init_alive_start);
4070         cancel_delayed_work(&priv->scan_check);
4071         cancel_delayed_work(&priv->alive_start);
4072         cancel_work_sync(&priv->beacon_update);
4073 }
4074
4075 static struct attribute *iwl3945_sysfs_entries[] = {
4076         &dev_attr_antenna.attr,
4077         &dev_attr_channels.attr,
4078         &dev_attr_dump_errors.attr,
4079         &dev_attr_dump_events.attr,
4080         &dev_attr_flags.attr,
4081         &dev_attr_filter_flags.attr,
4082 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4083         &dev_attr_measurement.attr,
4084 #endif
4085         &dev_attr_power_level.attr,
4086         &dev_attr_retry_rate.attr,
4087         &dev_attr_statistics.attr,
4088         &dev_attr_status.attr,
4089         &dev_attr_temperature.attr,
4090         &dev_attr_tx_power.attr,
4091 #ifdef CONFIG_IWLWIFI_DEBUG
4092         &dev_attr_debug_level.attr,
4093 #endif
4094         NULL
4095 };
4096
4097 static struct attribute_group iwl3945_attribute_group = {
4098         .name = NULL,           /* put in device directory */
4099         .attrs = iwl3945_sysfs_entries,
4100 };
4101
4102 static struct ieee80211_ops iwl3945_hw_ops = {
4103         .tx = iwl3945_mac_tx,
4104         .start = iwl3945_mac_start,
4105         .stop = iwl3945_mac_stop,
4106         .add_interface = iwl_mac_add_interface,
4107         .remove_interface = iwl_mac_remove_interface,
4108         .config = iwl_mac_config,
4109         .config_interface = iwl_mac_config_interface,
4110         .configure_filter = iwl_configure_filter,
4111         .set_key = iwl3945_mac_set_key,
4112         .get_tx_stats = iwl_mac_get_tx_stats,
4113         .conf_tx = iwl_mac_conf_tx,
4114         .reset_tsf = iwl_mac_reset_tsf,
4115         .bss_info_changed = iwl_bss_info_changed,
4116         .hw_scan = iwl_mac_hw_scan
4117 };
4118
4119 static int iwl3945_init_drv(struct iwl_priv *priv)
4120 {
4121         int ret;
4122         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4123
4124         priv->retry_rate = 1;
4125         priv->ibss_beacon = NULL;
4126
4127         spin_lock_init(&priv->lock);
4128         spin_lock_init(&priv->power_data.lock);
4129         spin_lock_init(&priv->sta_lock);
4130         spin_lock_init(&priv->hcmd_lock);
4131
4132         INIT_LIST_HEAD(&priv->free_frames);
4133
4134         mutex_init(&priv->mutex);
4135
4136         /* Clear the driver's (not device's) station table */
4137         priv->cfg->ops->smgmt->clear_station_table(priv);
4138
4139         priv->data_retry_limit = -1;
4140         priv->ieee_channels = NULL;
4141         priv->ieee_rates = NULL;
4142         priv->band = IEEE80211_BAND_2GHZ;
4143
4144         priv->iw_mode = NL80211_IFTYPE_STATION;
4145
4146         iwl_reset_qos(priv);
4147
4148         priv->qos_data.qos_active = 0;
4149         priv->qos_data.qos_cap.val = 0;
4150
4151         priv->rates_mask = IWL_RATES_MASK;
4152         /* If power management is turned on, default to CAM mode */
4153         priv->power_mode = IWL_POWER_MODE_CAM;
4154         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
4155
4156         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
4157                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4158                          eeprom->version);
4159                 ret = -EINVAL;
4160                 goto err;
4161         }
4162         ret = iwl_init_channel_map(priv);
4163         if (ret) {
4164                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
4165                 goto err;
4166         }
4167
4168         /* Set up txpower settings in driver for all channels */
4169         if (iwl3945_txpower_set_from_eeprom(priv)) {
4170                 ret = -EIO;
4171                 goto err_free_channel_map;
4172         }
4173
4174         ret = iwlcore_init_geos(priv);
4175         if (ret) {
4176                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
4177                 goto err_free_channel_map;
4178         }
4179         iwl3945_init_hw_rates(priv, priv->ieee_rates);
4180
4181         return 0;
4182
4183 err_free_channel_map:
4184         iwl_free_channel_map(priv);
4185 err:
4186         return ret;
4187 }
4188
4189 static int iwl3945_setup_mac(struct iwl_priv *priv)
4190 {
4191         int ret;
4192         struct ieee80211_hw *hw = priv->hw;
4193
4194         hw->rate_control_algorithm = "iwl-3945-rs";
4195         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
4196
4197         /* Tell mac80211 our characteristics */
4198         hw->flags = IEEE80211_HW_SIGNAL_DBM |
4199                     IEEE80211_HW_NOISE_DBM |
4200                     IEEE80211_HW_SPECTRUM_MGMT;
4201
4202         hw->wiphy->interface_modes =
4203                 BIT(NL80211_IFTYPE_STATION) |
4204                 BIT(NL80211_IFTYPE_ADHOC);
4205
4206         hw->wiphy->custom_regulatory = true;
4207
4208         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
4209         /* we create the 802.11 header and a zero-length SSID element */
4210         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
4211
4212         /* Default value; 4 EDCA QOS priorities */
4213         hw->queues = 4;
4214
4215         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4216                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4217                         &priv->bands[IEEE80211_BAND_2GHZ];
4218
4219         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4220                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4221                         &priv->bands[IEEE80211_BAND_5GHZ];
4222
4223         ret = ieee80211_register_hw(priv->hw);
4224         if (ret) {
4225                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
4226                 return ret;
4227         }
4228         priv->mac80211_registered = 1;
4229
4230         return 0;
4231 }
4232
4233 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4234 {
4235         int err = 0;
4236         struct iwl_priv *priv;
4237         struct ieee80211_hw *hw;
4238         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4239         struct iwl3945_eeprom *eeprom;
4240         unsigned long flags;
4241
4242         /***********************
4243          * 1. Allocating HW data
4244          * ********************/
4245
4246         /* mac80211 allocates memory for this device instance, including
4247          *   space for this driver's private structure */
4248         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4249         if (hw == NULL) {
4250                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4251                 err = -ENOMEM;
4252                 goto out;
4253         }
4254         priv = hw->priv;
4255         SET_IEEE80211_DEV(hw, &pdev->dev);
4256
4257         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
4258              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
4259                 IWL_ERR(priv,
4260                         "invalid queues_num, should be between %d and %d\n",
4261                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
4262                 err = -EINVAL;
4263                 goto out_ieee80211_free_hw;
4264         }
4265
4266         /*
4267          * Disabling hardware scan means that mac80211 will perform scans
4268          * "the hard way", rather than using device's scan.
4269          */
4270         if (iwl3945_mod_params.disable_hw_scan) {
4271                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4272                 iwl3945_hw_ops.hw_scan = NULL;
4273         }
4274
4275
4276         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4277         priv->cfg = cfg;
4278         priv->pci_dev = pdev;
4279
4280 #ifdef CONFIG_IWLWIFI_DEBUG
4281         priv->debug_level = iwl3945_mod_params.debug;
4282         atomic_set(&priv->restrict_refcnt, 0);
4283 #endif
4284
4285         /***************************
4286          * 2. Initializing PCI bus
4287          * *************************/
4288         if (pci_enable_device(pdev)) {
4289                 err = -ENODEV;
4290                 goto out_ieee80211_free_hw;
4291         }
4292
4293         pci_set_master(pdev);
4294
4295         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4296         if (!err)
4297                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4298         if (err) {
4299                 IWL_WARN(priv, "No suitable DMA available.\n");
4300                 goto out_pci_disable_device;
4301         }
4302
4303         pci_set_drvdata(pdev, priv);
4304         err = pci_request_regions(pdev, DRV_NAME);
4305         if (err)
4306                 goto out_pci_disable_device;
4307
4308         /***********************
4309          * 3. Read REV Register
4310          * ********************/
4311         priv->hw_base = pci_iomap(pdev, 0, 0);
4312         if (!priv->hw_base) {
4313                 err = -ENODEV;
4314                 goto out_pci_release_regions;
4315         }
4316
4317         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4318                         (unsigned long long) pci_resource_len(pdev, 0));
4319         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4320
4321         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4322          * PCI Tx retries from interfering with C3 CPU state */
4323         pci_write_config_byte(pdev, 0x41, 0x00);
4324
4325         /* amp init */
4326         err = priv->cfg->ops->lib->apm_ops.init(priv);
4327         if (err < 0) {
4328                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4329                 goto out_iounmap;
4330         }
4331
4332         /***********************
4333          * 4. Read EEPROM
4334          * ********************/
4335
4336         /* Read the EEPROM */
4337         err = iwl_eeprom_init(priv);
4338         if (err) {
4339                 IWL_ERR(priv, "Unable to init EEPROM\n");
4340                 goto out_iounmap;
4341         }
4342         /* MAC Address location in EEPROM same for 3945/4965 */
4343         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4344         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4345         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4346         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4347
4348         /***********************
4349          * 5. Setup HW Constants
4350          * ********************/
4351         /* Device-specific setup */
4352         if (iwl3945_hw_set_hw_params(priv)) {
4353                 IWL_ERR(priv, "failed to set hw settings\n");
4354                 goto out_eeprom_free;
4355         }
4356
4357         /***********************
4358          * 6. Setup priv
4359          * ********************/
4360
4361         err = iwl3945_init_drv(priv);
4362         if (err) {
4363                 IWL_ERR(priv, "initializing driver failed\n");
4364                 goto out_unset_hw_params;
4365         }
4366
4367         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4368                 priv->cfg->name);
4369
4370         /***********************
4371          * 7. Setup Services
4372          * ********************/
4373
4374         spin_lock_irqsave(&priv->lock, flags);
4375         iwl_disable_interrupts(priv);
4376         spin_unlock_irqrestore(&priv->lock, flags);
4377
4378         pci_enable_msi(priv->pci_dev);
4379
4380         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
4381                           DRV_NAME, priv);
4382         if (err) {
4383                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4384                 goto out_disable_msi;
4385         }
4386
4387         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4388         if (err) {
4389                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4390                 goto out_release_irq;
4391         }
4392
4393         iwl_set_rxon_channel(priv,
4394                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4395         iwl3945_setup_deferred_work(priv);
4396         iwl3945_setup_rx_handlers(priv);
4397
4398         /*********************************
4399          * 8. Setup and Register mac80211
4400          * *******************************/
4401
4402         iwl_enable_interrupts(priv);
4403
4404         err = iwl3945_setup_mac(priv);
4405         if (err)
4406                 goto  out_remove_sysfs;
4407
4408         err = iwl_dbgfs_register(priv, DRV_NAME);
4409         if (err)
4410                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4411
4412         err = iwl_rfkill_init(priv);
4413         if (err)
4414                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
4415                                   "Ignoring error: %d\n", err);
4416         else
4417                 iwl_rfkill_set_hw_state(priv);
4418
4419         /* Start monitoring the killswitch */
4420         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4421                            2 * HZ);
4422
4423         return 0;
4424
4425  out_remove_sysfs:
4426         destroy_workqueue(priv->workqueue);
4427         priv->workqueue = NULL;
4428         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4429  out_release_irq:
4430         free_irq(priv->pci_dev->irq, priv);
4431  out_disable_msi:
4432         pci_disable_msi(priv->pci_dev);
4433         iwlcore_free_geos(priv);
4434         iwl_free_channel_map(priv);
4435  out_unset_hw_params:
4436         iwl3945_unset_hw_params(priv);
4437  out_eeprom_free:
4438         iwl_eeprom_free(priv);
4439  out_iounmap:
4440         pci_iounmap(pdev, priv->hw_base);
4441  out_pci_release_regions:
4442         pci_release_regions(pdev);
4443  out_pci_disable_device:
4444         pci_set_drvdata(pdev, NULL);
4445         pci_disable_device(pdev);
4446  out_ieee80211_free_hw:
4447         ieee80211_free_hw(priv->hw);
4448  out:
4449         return err;
4450 }
4451
4452 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4453 {
4454         struct iwl_priv *priv = pci_get_drvdata(pdev);
4455         unsigned long flags;
4456
4457         if (!priv)
4458                 return;
4459
4460         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4461
4462         iwl_dbgfs_unregister(priv);
4463
4464         set_bit(STATUS_EXIT_PENDING, &priv->status);
4465
4466         if (priv->mac80211_registered) {
4467                 ieee80211_unregister_hw(priv->hw);
4468                 priv->mac80211_registered = 0;
4469         } else {
4470                 iwl3945_down(priv);
4471         }
4472
4473         /* make sure we flush any pending irq or
4474          * tasklet for the driver
4475          */
4476         spin_lock_irqsave(&priv->lock, flags);
4477         iwl_disable_interrupts(priv);
4478         spin_unlock_irqrestore(&priv->lock, flags);
4479
4480         iwl_synchronize_irq(priv);
4481
4482         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4483
4484         iwl_rfkill_unregister(priv);
4485         cancel_delayed_work_sync(&priv->rfkill_poll);
4486
4487         iwl3945_dealloc_ucode_pci(priv);
4488
4489         if (priv->rxq.bd)
4490                 iwl3945_rx_queue_free(priv, &priv->rxq);
4491         iwl3945_hw_txq_ctx_free(priv);
4492
4493         iwl3945_unset_hw_params(priv);
4494         priv->cfg->ops->smgmt->clear_station_table(priv);
4495
4496         /*netif_stop_queue(dev); */
4497         flush_workqueue(priv->workqueue);
4498
4499         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4500          * priv->workqueue... so we can't take down the workqueue
4501          * until now... */
4502         destroy_workqueue(priv->workqueue);
4503         priv->workqueue = NULL;
4504
4505         free_irq(pdev->irq, priv);
4506         pci_disable_msi(pdev);
4507
4508         pci_iounmap(pdev, priv->hw_base);
4509         pci_release_regions(pdev);
4510         pci_disable_device(pdev);
4511         pci_set_drvdata(pdev, NULL);
4512
4513         iwl_free_channel_map(priv);
4514         iwlcore_free_geos(priv);
4515         kfree(priv->scan);
4516         if (priv->ibss_beacon)
4517                 dev_kfree_skb(priv->ibss_beacon);
4518
4519         ieee80211_free_hw(priv->hw);
4520 }
4521
4522
4523 /*****************************************************************************
4524  *
4525  * driver and module entry point
4526  *
4527  *****************************************************************************/
4528
4529 static struct pci_driver iwl3945_driver = {
4530         .name = DRV_NAME,
4531         .id_table = iwl3945_hw_card_ids,
4532         .probe = iwl3945_pci_probe,
4533         .remove = __devexit_p(iwl3945_pci_remove),
4534 #ifdef CONFIG_PM
4535         .suspend = iwl_pci_suspend,
4536         .resume = iwl_pci_resume,
4537 #endif
4538 };
4539
4540 static int __init iwl3945_init(void)
4541 {
4542
4543         int ret;
4544         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4545         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4546
4547         ret = iwl3945_rate_control_register();
4548         if (ret) {
4549                 printk(KERN_ERR DRV_NAME
4550                        "Unable to register rate control algorithm: %d\n", ret);
4551                 return ret;
4552         }
4553
4554         ret = pci_register_driver(&iwl3945_driver);
4555         if (ret) {
4556                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4557                 goto error_register;
4558         }
4559
4560         return ret;
4561
4562 error_register:
4563         iwl3945_rate_control_unregister();
4564         return ret;
4565 }
4566
4567 static void __exit iwl3945_exit(void)
4568 {
4569         pci_unregister_driver(&iwl3945_driver);
4570         iwl3945_rate_control_unregister();
4571 }
4572
4573 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4574
4575 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4576 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4577 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4578 MODULE_PARM_DESC(swcrypto,
4579                  "using software crypto (default 1 [software])\n");
4580 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
4581 MODULE_PARM_DESC(debug, "debug output mask");
4582 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4583 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4584
4585 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
4586 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4587
4588 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4589 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4590
4591 module_exit(iwl3945_exit);
4592 module_init(iwl3945_init);