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
1348         while (1) {
1349                 spin_lock_irqsave(&rxq->lock, flags);
1350
1351                 if (list_empty(&rxq->rx_used)) {
1352                         spin_unlock_irqrestore(&rxq->lock, flags);
1353                         return;
1354                 }
1355
1356                 element = rxq->rx_used.next;
1357                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1358                 list_del(element);
1359                 spin_unlock_irqrestore(&rxq->lock, flags);
1360
1361                 /* Alloc a new receive buffer */
1362                 rxb->skb =
1363                     alloc_skb(priv->hw_params.rx_buf_size,
1364                                 GFP_KERNEL);
1365                 if (!rxb->skb) {
1366                         if (net_ratelimit())
1367                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1368                         /* We don't reschedule replenish work here -- we will
1369                          * call the restock method and if it still needs
1370                          * more buffers it will schedule replenish */
1371                         break;
1372                 }
1373
1374                 /* If radiotap head is required, reserve some headroom here.
1375                  * The physical head count is a variable rx_stats->phy_count.
1376                  * We reserve 4 bytes here. Plus these extra bytes, the
1377                  * headroom of the physical head should be enough for the
1378                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1379                  */
1380                 skb_reserve(rxb->skb, 4);
1381
1382                 /* Get physical address of RB/SKB */
1383                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1384                                                 rxb->skb->data,
1385                                                 priv->hw_params.rx_buf_size,
1386                                                 PCI_DMA_FROMDEVICE);
1387
1388                 spin_lock_irqsave(&rxq->lock, flags);
1389                 list_add_tail(&rxb->list, &rxq->rx_free);
1390                 priv->alloc_rxb_skb++;
1391                 rxq->free_count++;
1392                 spin_unlock_irqrestore(&rxq->lock, flags);
1393         }
1394 }
1395
1396 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1397 {
1398         unsigned long flags;
1399         int i;
1400         spin_lock_irqsave(&rxq->lock, flags);
1401         INIT_LIST_HEAD(&rxq->rx_free);
1402         INIT_LIST_HEAD(&rxq->rx_used);
1403         /* Fill the rx_used queue with _all_ of the Rx buffers */
1404         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1405                 /* In the reset function, these buffers may have been allocated
1406                  * to an SKB, so we need to unmap and free potential storage */
1407                 if (rxq->pool[i].skb != NULL) {
1408                         pci_unmap_single(priv->pci_dev,
1409                                          rxq->pool[i].real_dma_addr,
1410                                          priv->hw_params.rx_buf_size,
1411                                          PCI_DMA_FROMDEVICE);
1412                         priv->alloc_rxb_skb--;
1413                         dev_kfree_skb(rxq->pool[i].skb);
1414                         rxq->pool[i].skb = NULL;
1415                 }
1416                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1417         }
1418
1419         /* Set us so that we have processed and used all buffers, but have
1420          * not restocked the Rx queue with fresh buffers */
1421         rxq->read = rxq->write = 0;
1422         rxq->free_count = 0;
1423         spin_unlock_irqrestore(&rxq->lock, flags);
1424 }
1425
1426 void iwl3945_rx_replenish(void *data)
1427 {
1428         struct iwl_priv *priv = data;
1429         unsigned long flags;
1430
1431         iwl3945_rx_allocate(priv);
1432
1433         spin_lock_irqsave(&priv->lock, flags);
1434         iwl3945_rx_queue_restock(priv);
1435         spin_unlock_irqrestore(&priv->lock, flags);
1436 }
1437
1438 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1439  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1440  * This free routine walks the list of POOL entries and if SKB is set to
1441  * non NULL it is unmapped and freed
1442  */
1443 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1444 {
1445         int i;
1446         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1447                 if (rxq->pool[i].skb != NULL) {
1448                         pci_unmap_single(priv->pci_dev,
1449                                          rxq->pool[i].real_dma_addr,
1450                                          priv->hw_params.rx_buf_size,
1451                                          PCI_DMA_FROMDEVICE);
1452                         dev_kfree_skb(rxq->pool[i].skb);
1453                 }
1454         }
1455
1456         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1457                             rxq->dma_addr);
1458         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1459                             rxq->rb_stts, rxq->rb_stts_dma);
1460         rxq->bd = NULL;
1461         rxq->rb_stts  = NULL;
1462 }
1463 EXPORT_SYMBOL(iwl3945_rx_queue_free);
1464
1465
1466 /* Convert linear signal-to-noise ratio into dB */
1467 static u8 ratio2dB[100] = {
1468 /*       0   1   2   3   4   5   6   7   8   9 */
1469          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1470         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1471         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1472         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1473         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1474         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1475         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1476         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1477         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1478         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1479 };
1480
1481 /* Calculates a relative dB value from a ratio of linear
1482  *   (i.e. not dB) signal levels.
1483  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1484 int iwl3945_calc_db_from_ratio(int sig_ratio)
1485 {
1486         /* 1000:1 or higher just report as 60 dB */
1487         if (sig_ratio >= 1000)
1488                 return 60;
1489
1490         /* 100:1 or higher, divide by 10 and use table,
1491          *   add 20 dB to make up for divide by 10 */
1492         if (sig_ratio >= 100)
1493                 return 20 + (int)ratio2dB[sig_ratio/10];
1494
1495         /* We shouldn't see this */
1496         if (sig_ratio < 1)
1497                 return 0;
1498
1499         /* Use table for ratios 1:1 - 99:1 */
1500         return (int)ratio2dB[sig_ratio];
1501 }
1502
1503 #define PERFECT_RSSI (-20) /* dBm */
1504 #define WORST_RSSI (-95)   /* dBm */
1505 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1506
1507 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1508  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1509  *   about formulas used below. */
1510 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1511 {
1512         int sig_qual;
1513         int degradation = PERFECT_RSSI - rssi_dbm;
1514
1515         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1516          * as indicator; formula is (signal dbm - noise dbm).
1517          * SNR at or above 40 is a great signal (100%).
1518          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1519          * Weakest usable signal is usually 10 - 15 dB SNR. */
1520         if (noise_dbm) {
1521                 if (rssi_dbm - noise_dbm >= 40)
1522                         return 100;
1523                 else if (rssi_dbm < noise_dbm)
1524                         return 0;
1525                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1526
1527         /* Else use just the signal level.
1528          * This formula is a least squares fit of data points collected and
1529          *   compared with a reference system that had a percentage (%) display
1530          *   for signal quality. */
1531         } else
1532                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1533                             (15 * RSSI_RANGE + 62 * degradation)) /
1534                            (RSSI_RANGE * RSSI_RANGE);
1535
1536         if (sig_qual > 100)
1537                 sig_qual = 100;
1538         else if (sig_qual < 1)
1539                 sig_qual = 0;
1540
1541         return sig_qual;
1542 }
1543
1544 /**
1545  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1546  *
1547  * Uses the priv->rx_handlers callback function array to invoke
1548  * the appropriate handlers, including command responses,
1549  * frame-received notifications, and other notifications.
1550  */
1551 static void iwl3945_rx_handle(struct iwl_priv *priv)
1552 {
1553         struct iwl_rx_mem_buffer *rxb;
1554         struct iwl_rx_packet *pkt;
1555         struct iwl_rx_queue *rxq = &priv->rxq;
1556         u32 r, i;
1557         int reclaim;
1558         unsigned long flags;
1559         u8 fill_rx = 0;
1560         u32 count = 8;
1561
1562         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1563          * buffer that the driver may process (last buffer filled by ucode). */
1564         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1565         i = rxq->read;
1566
1567         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1568                 fill_rx = 1;
1569         /* Rx interrupt, but nothing sent from uCode */
1570         if (i == r)
1571                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1572
1573         while (i != r) {
1574                 rxb = rxq->queue[i];
1575
1576                 /* If an RXB doesn't have a Rx queue slot associated with it,
1577                  * then a bug has been introduced in the queue refilling
1578                  * routines -- catch it here */
1579                 BUG_ON(rxb == NULL);
1580
1581                 rxq->queue[i] = NULL;
1582
1583                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1584                                 priv->hw_params.rx_buf_size,
1585                                 PCI_DMA_FROMDEVICE);
1586                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1587
1588                 /* Reclaim a command buffer only if this packet is a response
1589                  *   to a (driver-originated) command.
1590                  * If the packet (e.g. Rx frame) originated from uCode,
1591                  *   there is no command buffer to reclaim.
1592                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1593                  *   but apparently a few don't get set; catch them here. */
1594                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1595                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1596                         (pkt->hdr.cmd != REPLY_TX);
1597
1598                 /* Based on type of command response or notification,
1599                  *   handle those that need handling via function in
1600                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1601                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1602                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1603                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1604                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1605                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1606                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1607                 } else {
1608                         /* No handling needed */
1609                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1610                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1611                                 r, i, get_cmd_string(pkt->hdr.cmd),
1612                                 pkt->hdr.cmd);
1613                 }
1614
1615                 if (reclaim) {
1616                         /* Invoke any callbacks, transfer the skb to caller, and
1617                          * fire off the (possibly) blocking iwl_send_cmd()
1618                          * as we reclaim the driver command queue */
1619                         if (rxb && rxb->skb)
1620                                 iwl_tx_cmd_complete(priv, rxb);
1621                         else
1622                                 IWL_WARN(priv, "Claim null rxb?\n");
1623                 }
1624
1625                 /* For now we just don't re-use anything.  We can tweak this
1626                  * later to try and re-use notification packets and SKBs that
1627                  * fail to Rx correctly */
1628                 if (rxb->skb != NULL) {
1629                         priv->alloc_rxb_skb--;
1630                         dev_kfree_skb_any(rxb->skb);
1631                         rxb->skb = NULL;
1632                 }
1633
1634                 spin_lock_irqsave(&rxq->lock, flags);
1635                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1636                 spin_unlock_irqrestore(&rxq->lock, flags);
1637                 i = (i + 1) & RX_QUEUE_MASK;
1638                 /* If there are a lot of unused frames,
1639                  * restock the Rx queue so ucode won't assert. */
1640                 if (fill_rx) {
1641                         count++;
1642                         if (count >= 8) {
1643                                 priv->rxq.read = i;
1644                                 iwl3945_rx_queue_restock(priv);
1645                                 count = 0;
1646                         }
1647                 }
1648         }
1649
1650         /* Backtrack one entry */
1651         priv->rxq.read = i;
1652         iwl3945_rx_queue_restock(priv);
1653 }
1654
1655 /* call this function to flush any scheduled tasklet */
1656 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1657 {
1658         /* wait to make sure we flush pending tasklet*/
1659         synchronize_irq(priv->pci_dev->irq);
1660         tasklet_kill(&priv->irq_tasklet);
1661 }
1662
1663 static const char *desc_lookup(int i)
1664 {
1665         switch (i) {
1666         case 1:
1667                 return "FAIL";
1668         case 2:
1669                 return "BAD_PARAM";
1670         case 3:
1671                 return "BAD_CHECKSUM";
1672         case 4:
1673                 return "NMI_INTERRUPT";
1674         case 5:
1675                 return "SYSASSERT";
1676         case 6:
1677                 return "FATAL_ERROR";
1678         }
1679
1680         return "UNKNOWN";
1681 }
1682
1683 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1684 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1685
1686 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1687 {
1688         u32 i;
1689         u32 desc, time, count, base, data1;
1690         u32 blink1, blink2, ilink1, ilink2;
1691         int rc;
1692
1693         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1694
1695         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1696                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1697                 return;
1698         }
1699
1700         rc = iwl_grab_nic_access(priv);
1701         if (rc) {
1702                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1703                 return;
1704         }
1705
1706         count = iwl_read_targ_mem(priv, base);
1707
1708         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1709                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1710                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1711                         priv->status, count);
1712         }
1713
1714         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1715                   "ilink1  nmiPC   Line\n");
1716         for (i = ERROR_START_OFFSET;
1717              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1718              i += ERROR_ELEM_SIZE) {
1719                 desc = iwl_read_targ_mem(priv, base + i);
1720                 time =
1721                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1722                 blink1 =
1723                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1724                 blink2 =
1725                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1726                 ilink1 =
1727                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1728                 ilink2 =
1729                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1730                 data1 =
1731                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1732
1733                 IWL_ERR(priv,
1734                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1735                         desc_lookup(desc), desc, time, blink1, blink2,
1736                         ilink1, ilink2, data1);
1737         }
1738
1739         iwl_release_nic_access(priv);
1740
1741 }
1742
1743 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1744
1745 /**
1746  * iwl3945_print_event_log - Dump error event log to syslog
1747  *
1748  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1749  */
1750 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1751                                 u32 num_events, u32 mode)
1752 {
1753         u32 i;
1754         u32 base;       /* SRAM byte address of event log header */
1755         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1756         u32 ptr;        /* SRAM byte address of log data */
1757         u32 ev, time, data; /* event log data */
1758
1759         if (num_events == 0)
1760                 return;
1761
1762         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1763
1764         if (mode == 0)
1765                 event_size = 2 * sizeof(u32);
1766         else
1767                 event_size = 3 * sizeof(u32);
1768
1769         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1770
1771         /* "time" is actually "data" for mode 0 (no timestamp).
1772          * place event id # at far right for easier visual parsing. */
1773         for (i = 0; i < num_events; i++) {
1774                 ev = iwl_read_targ_mem(priv, ptr);
1775                 ptr += sizeof(u32);
1776                 time = iwl_read_targ_mem(priv, ptr);
1777                 ptr += sizeof(u32);
1778                 if (mode == 0) {
1779                         /* data, ev */
1780                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1781                 } else {
1782                         data = iwl_read_targ_mem(priv, ptr);
1783                         ptr += sizeof(u32);
1784                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1785                 }
1786         }
1787 }
1788
1789 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1790 {
1791         int rc;
1792         u32 base;       /* SRAM byte address of event log header */
1793         u32 capacity;   /* event log capacity in # entries */
1794         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1795         u32 num_wraps;  /* # times uCode wrapped to top of log */
1796         u32 next_entry; /* index of next entry to be written by uCode */
1797         u32 size;       /* # entries that we'll print */
1798
1799         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1800         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1801                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1802                 return;
1803         }
1804
1805         rc = iwl_grab_nic_access(priv);
1806         if (rc) {
1807                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1808                 return;
1809         }
1810
1811         /* event log header */
1812         capacity = iwl_read_targ_mem(priv, base);
1813         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1814         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1815         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1816
1817         size = num_wraps ? capacity : next_entry;
1818
1819         /* bail out if nothing in log */
1820         if (size == 0) {
1821                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1822                 iwl_release_nic_access(priv);
1823                 return;
1824         }
1825
1826         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1827                   size, num_wraps);
1828
1829         /* if uCode has wrapped back to top of log, start at the oldest entry,
1830          * i.e the next one that uCode would fill. */
1831         if (num_wraps)
1832                 iwl3945_print_event_log(priv, next_entry,
1833                                     capacity - next_entry, mode);
1834
1835         /* (then/else) start at top of log */
1836         iwl3945_print_event_log(priv, 0, next_entry, mode);
1837
1838         iwl_release_nic_access(priv);
1839 }
1840
1841 static void iwl3945_error_recovery(struct iwl_priv *priv)
1842 {
1843         unsigned long flags;
1844
1845         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1846                sizeof(priv->staging_rxon));
1847         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1848         iwlcore_commit_rxon(priv);
1849
1850         priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 1, 0, NULL);
1851
1852         spin_lock_irqsave(&priv->lock, flags);
1853         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1854         priv->error_recovering = 0;
1855         spin_unlock_irqrestore(&priv->lock, flags);
1856 }
1857
1858 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1859 {
1860         u32 inta, handled = 0;
1861         u32 inta_fh;
1862         unsigned long flags;
1863 #ifdef CONFIG_IWLWIFI_DEBUG
1864         u32 inta_mask;
1865 #endif
1866
1867         spin_lock_irqsave(&priv->lock, flags);
1868
1869         /* Ack/clear/reset pending uCode interrupts.
1870          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1871          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1872         inta = iwl_read32(priv, CSR_INT);
1873         iwl_write32(priv, CSR_INT, inta);
1874
1875         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1876          * Any new interrupts that happen after this, either while we're
1877          * in this tasklet, or later, will show up in next ISR/tasklet. */
1878         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1879         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1880
1881 #ifdef CONFIG_IWLWIFI_DEBUG
1882         if (priv->debug_level & IWL_DL_ISR) {
1883                 /* just for debug */
1884                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1885                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1886                               inta, inta_mask, inta_fh);
1887         }
1888 #endif
1889
1890         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1891          * atomic, make sure that inta covers all the interrupts that
1892          * we've discovered, even if FH interrupt came in just after
1893          * reading CSR_INT. */
1894         if (inta_fh & CSR39_FH_INT_RX_MASK)
1895                 inta |= CSR_INT_BIT_FH_RX;
1896         if (inta_fh & CSR39_FH_INT_TX_MASK)
1897                 inta |= CSR_INT_BIT_FH_TX;
1898
1899         /* Now service all interrupt bits discovered above. */
1900         if (inta & CSR_INT_BIT_HW_ERR) {
1901                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1902
1903                 /* Tell the device to stop sending interrupts */
1904                 iwl_disable_interrupts(priv);
1905
1906                 priv->isr_stats.hw++;
1907                 iwl_irq_handle_error(priv);
1908
1909                 handled |= CSR_INT_BIT_HW_ERR;
1910
1911                 spin_unlock_irqrestore(&priv->lock, flags);
1912
1913                 return;
1914         }
1915
1916 #ifdef CONFIG_IWLWIFI_DEBUG
1917         if (priv->debug_level & (IWL_DL_ISR)) {
1918                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1919                 if (inta & CSR_INT_BIT_SCD) {
1920                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1921                                       "the frame/frames.\n");
1922                         priv->isr_stats.sch++;
1923                 }
1924
1925                 /* Alive notification via Rx interrupt will do the real work */
1926                 if (inta & CSR_INT_BIT_ALIVE) {
1927                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1928                         priv->isr_stats.alive++;
1929                 }
1930         }
1931 #endif
1932         /* Safely ignore these bits for debug checks below */
1933         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1934
1935         /* Error detected by uCode */
1936         if (inta & CSR_INT_BIT_SW_ERR) {
1937                 IWL_ERR(priv, "Microcode SW error detected. "
1938                         "Restarting 0x%X.\n", inta);
1939                 priv->isr_stats.sw++;
1940                 priv->isr_stats.sw_err = inta;
1941                 iwl_irq_handle_error(priv);
1942                 handled |= CSR_INT_BIT_SW_ERR;
1943         }
1944
1945         /* uCode wakes up after power-down sleep */
1946         if (inta & CSR_INT_BIT_WAKEUP) {
1947                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1948                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1949                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1950                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1951                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1952                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1953                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1954                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1955
1956                 priv->isr_stats.wakeup++;
1957                 handled |= CSR_INT_BIT_WAKEUP;
1958         }
1959
1960         /* All uCode command responses, including Tx command responses,
1961          * Rx "responses" (frame-received notification), and other
1962          * notifications from uCode come through here*/
1963         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1964                 iwl3945_rx_handle(priv);
1965                 priv->isr_stats.rx++;
1966                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1967         }
1968
1969         if (inta & CSR_INT_BIT_FH_TX) {
1970                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1971                 priv->isr_stats.tx++;
1972
1973                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1974                 if (!iwl_grab_nic_access(priv)) {
1975                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
1976                                              (FH39_SRVC_CHNL), 0x0);
1977                         iwl_release_nic_access(priv);
1978                 }
1979                 handled |= CSR_INT_BIT_FH_TX;
1980         }
1981
1982         if (inta & ~handled) {
1983                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1984                 priv->isr_stats.unhandled++;
1985         }
1986
1987         if (inta & ~CSR_INI_SET_MASK) {
1988                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1989                          inta & ~CSR_INI_SET_MASK);
1990                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1991         }
1992
1993         /* Re-enable all interrupts */
1994         /* only Re-enable if disabled by irq */
1995         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1996                 iwl_enable_interrupts(priv);
1997
1998 #ifdef CONFIG_IWLWIFI_DEBUG
1999         if (priv->debug_level & (IWL_DL_ISR)) {
2000                 inta = iwl_read32(priv, CSR_INT);
2001                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2002                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2003                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2004                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2005         }
2006 #endif
2007         spin_unlock_irqrestore(&priv->lock, flags);
2008 }
2009
2010 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2011                                          enum ieee80211_band band,
2012                                      u8 is_active, u8 n_probes,
2013                                      struct iwl3945_scan_channel *scan_ch)
2014 {
2015         const struct ieee80211_channel *channels = NULL;
2016         const struct ieee80211_supported_band *sband;
2017         const struct iwl_channel_info *ch_info;
2018         u16 passive_dwell = 0;
2019         u16 active_dwell = 0;
2020         int added, i;
2021
2022         sband = iwl_get_hw_mode(priv, band);
2023         if (!sband)
2024                 return 0;
2025
2026         channels = sband->channels;
2027
2028         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2029         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2030
2031         if (passive_dwell <= active_dwell)
2032                 passive_dwell = active_dwell + 1;
2033
2034         for (i = 0, added = 0; i < sband->n_channels; i++) {
2035                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2036                         continue;
2037
2038                 scan_ch->channel = channels[i].hw_value;
2039
2040                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2041                 if (!is_channel_valid(ch_info)) {
2042                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
2043                                        scan_ch->channel);
2044                         continue;
2045                 }
2046
2047                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2048                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2049                 /* If passive , set up for auto-switch
2050                  *  and use long active_dwell time.
2051                  */
2052                 if (!is_active || is_channel_passive(ch_info) ||
2053                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2054                         scan_ch->type = 0;      /* passive */
2055                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2056                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2057                 } else {
2058                         scan_ch->type = 1;      /* active */
2059                 }
2060
2061                 /* Set direct probe bits. These may be used both for active
2062                  * scan channels (probes gets sent right away),
2063                  * or for passive channels (probes get se sent only after
2064                  * hearing clear Rx packet).*/
2065                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2066                         if (n_probes)
2067                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2068                 } else {
2069                         /* uCode v1 does not allow setting direct probe bits on
2070                          * passive channel. */
2071                         if ((scan_ch->type & 1) && n_probes)
2072                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2073                 }
2074
2075                 /* Set txpower levels to defaults */
2076                 scan_ch->tpc.dsp_atten = 110;
2077                 /* scan_pwr_info->tpc.dsp_atten; */
2078
2079                 /*scan_pwr_info->tpc.tx_gain; */
2080                 if (band == IEEE80211_BAND_5GHZ)
2081                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2082                 else {
2083                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2084                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2085                          * power level:
2086                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2087                          */
2088                 }
2089
2090                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
2091                                scan_ch->channel,
2092                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2093                                (scan_ch->type & 1) ?
2094                                active_dwell : passive_dwell);
2095
2096                 scan_ch++;
2097                 added++;
2098         }
2099
2100         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
2101         return added;
2102 }
2103
2104 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2105                               struct ieee80211_rate *rates)
2106 {
2107         int i;
2108
2109         for (i = 0; i < IWL_RATE_COUNT; i++) {
2110                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2111                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2112                 rates[i].hw_value_short = i;
2113                 rates[i].flags = 0;
2114                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2115                         /*
2116                          * If CCK != 1M then set short preamble rate flag.
2117                          */
2118                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2119                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2120                 }
2121         }
2122 }
2123
2124 /******************************************************************************
2125  *
2126  * uCode download functions
2127  *
2128  ******************************************************************************/
2129
2130 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2131 {
2132         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2133         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2134         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2135         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2136         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2137         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2138 }
2139
2140 /**
2141  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2142  *     looking at all data.
2143  */
2144 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2145 {
2146         u32 val;
2147         u32 save_len = len;
2148         int rc = 0;
2149         u32 errcnt;
2150
2151         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2152
2153         rc = iwl_grab_nic_access(priv);
2154         if (rc)
2155                 return rc;
2156
2157         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2158                                IWL39_RTC_INST_LOWER_BOUND);
2159
2160         errcnt = 0;
2161         for (; len > 0; len -= sizeof(u32), image++) {
2162                 /* read data comes through single port, auto-incr addr */
2163                 /* NOTE: Use the debugless read so we don't flood kernel log
2164                  * if IWL_DL_IO is set */
2165                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2166                 if (val != le32_to_cpu(*image)) {
2167                         IWL_ERR(priv, "uCode INST section is invalid at "
2168                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2169                                   save_len - len, val, le32_to_cpu(*image));
2170                         rc = -EIO;
2171                         errcnt++;
2172                         if (errcnt >= 20)
2173                                 break;
2174                 }
2175         }
2176
2177         iwl_release_nic_access(priv);
2178
2179         if (!errcnt)
2180                 IWL_DEBUG_INFO(priv,
2181                         "ucode image in INSTRUCTION memory is good\n");
2182
2183         return rc;
2184 }
2185
2186
2187 /**
2188  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2189  *   using sample data 100 bytes apart.  If these sample points are good,
2190  *   it's a pretty good bet that everything between them is good, too.
2191  */
2192 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2193 {
2194         u32 val;
2195         int rc = 0;
2196         u32 errcnt = 0;
2197         u32 i;
2198
2199         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2200
2201         rc = iwl_grab_nic_access(priv);
2202         if (rc)
2203                 return rc;
2204
2205         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2206                 /* read data comes through single port, auto-incr addr */
2207                 /* NOTE: Use the debugless read so we don't flood kernel log
2208                  * if IWL_DL_IO is set */
2209                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2210                         i + IWL39_RTC_INST_LOWER_BOUND);
2211                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2212                 if (val != le32_to_cpu(*image)) {
2213 #if 0 /* Enable this if you want to see details */
2214                         IWL_ERR(priv, "uCode INST section is invalid at "
2215                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2216                                   i, val, *image);
2217 #endif
2218                         rc = -EIO;
2219                         errcnt++;
2220                         if (errcnt >= 3)
2221                                 break;
2222                 }
2223         }
2224
2225         iwl_release_nic_access(priv);
2226
2227         return rc;
2228 }
2229
2230
2231 /**
2232  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2233  *    and verify its contents
2234  */
2235 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2236 {
2237         __le32 *image;
2238         u32 len;
2239         int rc = 0;
2240
2241         /* Try bootstrap */
2242         image = (__le32 *)priv->ucode_boot.v_addr;
2243         len = priv->ucode_boot.len;
2244         rc = iwl3945_verify_inst_sparse(priv, image, len);
2245         if (rc == 0) {
2246                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2247                 return 0;
2248         }
2249
2250         /* Try initialize */
2251         image = (__le32 *)priv->ucode_init.v_addr;
2252         len = priv->ucode_init.len;
2253         rc = iwl3945_verify_inst_sparse(priv, image, len);
2254         if (rc == 0) {
2255                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2256                 return 0;
2257         }
2258
2259         /* Try runtime/protocol */
2260         image = (__le32 *)priv->ucode_code.v_addr;
2261         len = priv->ucode_code.len;
2262         rc = iwl3945_verify_inst_sparse(priv, image, len);
2263         if (rc == 0) {
2264                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2265                 return 0;
2266         }
2267
2268         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2269
2270         /* Since nothing seems to match, show first several data entries in
2271          * instruction SRAM, so maybe visual inspection will give a clue.
2272          * Selection of bootstrap image (vs. other images) is arbitrary. */
2273         image = (__le32 *)priv->ucode_boot.v_addr;
2274         len = priv->ucode_boot.len;
2275         rc = iwl3945_verify_inst_full(priv, image, len);
2276
2277         return rc;
2278 }
2279
2280 static void iwl3945_nic_start(struct iwl_priv *priv)
2281 {
2282         /* Remove all resets to allow NIC to operate */
2283         iwl_write32(priv, CSR_RESET, 0);
2284 }
2285
2286 /**
2287  * iwl3945_read_ucode - Read uCode images from disk file.
2288  *
2289  * Copy into buffers for card to fetch via bus-mastering
2290  */
2291 static int iwl3945_read_ucode(struct iwl_priv *priv)
2292 {
2293         struct iwl_ucode *ucode;
2294         int ret = -EINVAL, index;
2295         const struct firmware *ucode_raw;
2296         /* firmware file name contains uCode/driver compatibility version */
2297         const char *name_pre = priv->cfg->fw_name_pre;
2298         const unsigned int api_max = priv->cfg->ucode_api_max;
2299         const unsigned int api_min = priv->cfg->ucode_api_min;
2300         char buf[25];
2301         u8 *src;
2302         size_t len;
2303         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2304
2305         /* Ask kernel firmware_class module to get the boot firmware off disk.
2306          * request_firmware() is synchronous, file is in memory on return. */
2307         for (index = api_max; index >= api_min; index--) {
2308                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2309                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2310                 if (ret < 0) {
2311                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2312                                   buf, ret);
2313                         if (ret == -ENOENT)
2314                                 continue;
2315                         else
2316                                 goto error;
2317                 } else {
2318                         if (index < api_max)
2319                                 IWL_ERR(priv, "Loaded firmware %s, "
2320                                         "which is deprecated. "
2321                                         " Please use API v%u instead.\n",
2322                                           buf, api_max);
2323                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2324                                        "(%zd bytes) from disk\n",
2325                                        buf, ucode_raw->size);
2326                         break;
2327                 }
2328         }
2329
2330         if (ret < 0)
2331                 goto error;
2332
2333         /* Make sure that we got at least our header! */
2334         if (ucode_raw->size < sizeof(*ucode)) {
2335                 IWL_ERR(priv, "File size way too small!\n");
2336                 ret = -EINVAL;
2337                 goto err_release;
2338         }
2339
2340         /* Data from ucode file:  header followed by uCode images */
2341         ucode = (void *)ucode_raw->data;
2342
2343         priv->ucode_ver = le32_to_cpu(ucode->ver);
2344         api_ver = IWL_UCODE_API(priv->ucode_ver);
2345         inst_size = le32_to_cpu(ucode->inst_size);
2346         data_size = le32_to_cpu(ucode->data_size);
2347         init_size = le32_to_cpu(ucode->init_size);
2348         init_data_size = le32_to_cpu(ucode->init_data_size);
2349         boot_size = le32_to_cpu(ucode->boot_size);
2350
2351         /* api_ver should match the api version forming part of the
2352          * firmware filename ... but we don't check for that and only rely
2353          * on the API version read from firmware header from here on forward */
2354
2355         if (api_ver < api_min || api_ver > api_max) {
2356                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2357                           "Driver supports v%u, firmware is v%u.\n",
2358                           api_max, api_ver);
2359                 priv->ucode_ver = 0;
2360                 ret = -EINVAL;
2361                 goto err_release;
2362         }
2363         if (api_ver != api_max)
2364                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2365                           "got %u. New firmware can be obtained "
2366                           "from http://www.intellinuxwireless.org.\n",
2367                           api_max, api_ver);
2368
2369         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2370                 IWL_UCODE_MAJOR(priv->ucode_ver),
2371                 IWL_UCODE_MINOR(priv->ucode_ver),
2372                 IWL_UCODE_API(priv->ucode_ver),
2373                 IWL_UCODE_SERIAL(priv->ucode_ver));
2374
2375         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2376                        priv->ucode_ver);
2377         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2378                        inst_size);
2379         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2380                        data_size);
2381         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2382                        init_size);
2383         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2384                        init_data_size);
2385         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2386                        boot_size);
2387
2388
2389         /* Verify size of file vs. image size info in file's header */
2390         if (ucode_raw->size < sizeof(*ucode) +
2391                 inst_size + data_size + init_size +
2392                 init_data_size + boot_size) {
2393
2394                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2395                                ucode_raw->size);
2396                 ret = -EINVAL;
2397                 goto err_release;
2398         }
2399
2400         /* Verify that uCode images will fit in card's SRAM */
2401         if (inst_size > IWL39_MAX_INST_SIZE) {
2402                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2403                                inst_size);
2404                 ret = -EINVAL;
2405                 goto err_release;
2406         }
2407
2408         if (data_size > IWL39_MAX_DATA_SIZE) {
2409                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2410                                data_size);
2411                 ret = -EINVAL;
2412                 goto err_release;
2413         }
2414         if (init_size > IWL39_MAX_INST_SIZE) {
2415                 IWL_DEBUG_INFO(priv,
2416                                 "uCode init instr len %d too large to fit in\n",
2417                                 init_size);
2418                 ret = -EINVAL;
2419                 goto err_release;
2420         }
2421         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2422                 IWL_DEBUG_INFO(priv,
2423                                 "uCode init data len %d too large to fit in\n",
2424                                 init_data_size);
2425                 ret = -EINVAL;
2426                 goto err_release;
2427         }
2428         if (boot_size > IWL39_MAX_BSM_SIZE) {
2429                 IWL_DEBUG_INFO(priv,
2430                                 "uCode boot instr len %d too large to fit in\n",
2431                                 boot_size);
2432                 ret = -EINVAL;
2433                 goto err_release;
2434         }
2435
2436         /* Allocate ucode buffers for card's bus-master loading ... */
2437
2438         /* Runtime instructions and 2 copies of data:
2439          * 1) unmodified from disk
2440          * 2) backup cache for save/restore during power-downs */
2441         priv->ucode_code.len = inst_size;
2442         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2443
2444         priv->ucode_data.len = data_size;
2445         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2446
2447         priv->ucode_data_backup.len = data_size;
2448         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2449
2450         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2451             !priv->ucode_data_backup.v_addr)
2452                 goto err_pci_alloc;
2453
2454         /* Initialization instructions and data */
2455         if (init_size && init_data_size) {
2456                 priv->ucode_init.len = init_size;
2457                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2458
2459                 priv->ucode_init_data.len = init_data_size;
2460                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2461
2462                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2463                         goto err_pci_alloc;
2464         }
2465
2466         /* Bootstrap (instructions only, no data) */
2467         if (boot_size) {
2468                 priv->ucode_boot.len = boot_size;
2469                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2470
2471                 if (!priv->ucode_boot.v_addr)
2472                         goto err_pci_alloc;
2473         }
2474
2475         /* Copy images into buffers for card's bus-master reads ... */
2476
2477         /* Runtime instructions (first block of data in file) */
2478         src = &ucode->data[0];
2479         len = priv->ucode_code.len;
2480         IWL_DEBUG_INFO(priv,
2481                 "Copying (but not loading) uCode instr len %zd\n", len);
2482         memcpy(priv->ucode_code.v_addr, src, len);
2483         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2484                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2485
2486         /* Runtime data (2nd block)
2487          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2488         src = &ucode->data[inst_size];
2489         len = priv->ucode_data.len;
2490         IWL_DEBUG_INFO(priv,
2491                 "Copying (but not loading) uCode data len %zd\n", len);
2492         memcpy(priv->ucode_data.v_addr, src, len);
2493         memcpy(priv->ucode_data_backup.v_addr, src, len);
2494
2495         /* Initialization instructions (3rd block) */
2496         if (init_size) {
2497                 src = &ucode->data[inst_size + data_size];
2498                 len = priv->ucode_init.len;
2499                 IWL_DEBUG_INFO(priv,
2500                         "Copying (but not loading) init instr len %zd\n", len);
2501                 memcpy(priv->ucode_init.v_addr, src, len);
2502         }
2503
2504         /* Initialization data (4th block) */
2505         if (init_data_size) {
2506                 src = &ucode->data[inst_size + data_size + init_size];
2507                 len = priv->ucode_init_data.len;
2508                 IWL_DEBUG_INFO(priv,
2509                         "Copying (but not loading) init data len %zd\n", len);
2510                 memcpy(priv->ucode_init_data.v_addr, src, len);
2511         }
2512
2513         /* Bootstrap instructions (5th block) */
2514         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2515         len = priv->ucode_boot.len;
2516         IWL_DEBUG_INFO(priv,
2517                 "Copying (but not loading) boot instr len %zd\n", len);
2518         memcpy(priv->ucode_boot.v_addr, src, len);
2519
2520         /* We have our copies now, allow OS release its copies */
2521         release_firmware(ucode_raw);
2522         return 0;
2523
2524  err_pci_alloc:
2525         IWL_ERR(priv, "failed to allocate pci memory\n");
2526         ret = -ENOMEM;
2527         iwl3945_dealloc_ucode_pci(priv);
2528
2529  err_release:
2530         release_firmware(ucode_raw);
2531
2532  error:
2533         return ret;
2534 }
2535
2536
2537 /**
2538  * iwl3945_set_ucode_ptrs - Set uCode address location
2539  *
2540  * Tell initialization uCode where to find runtime uCode.
2541  *
2542  * BSM registers initially contain pointers to initialization uCode.
2543  * We need to replace them to load runtime uCode inst and data,
2544  * and to save runtime data when powering down.
2545  */
2546 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2547 {
2548         dma_addr_t pinst;
2549         dma_addr_t pdata;
2550         int rc = 0;
2551         unsigned long flags;
2552
2553         /* bits 31:0 for 3945 */
2554         pinst = priv->ucode_code.p_addr;
2555         pdata = priv->ucode_data_backup.p_addr;
2556
2557         spin_lock_irqsave(&priv->lock, flags);
2558         rc = iwl_grab_nic_access(priv);
2559         if (rc) {
2560                 spin_unlock_irqrestore(&priv->lock, flags);
2561                 return rc;
2562         }
2563
2564         /* Tell bootstrap uCode where to find image to load */
2565         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2566         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2567         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2568                                  priv->ucode_data.len);
2569
2570         /* Inst byte count must be last to set up, bit 31 signals uCode
2571          *   that all new ptr/size info is in place */
2572         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2573                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2574
2575         iwl_release_nic_access(priv);
2576
2577         spin_unlock_irqrestore(&priv->lock, flags);
2578
2579         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2580
2581         return rc;
2582 }
2583
2584 /**
2585  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2586  *
2587  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2588  *
2589  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2590  */
2591 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2592 {
2593         /* Check alive response for "valid" sign from uCode */
2594         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2595                 /* We had an error bringing up the hardware, so take it
2596                  * all the way back down so we can try again */
2597                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2598                 goto restart;
2599         }
2600
2601         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2602          * This is a paranoid check, because we would not have gotten the
2603          * "initialize" alive if code weren't properly loaded.  */
2604         if (iwl3945_verify_ucode(priv)) {
2605                 /* Runtime instruction load was bad;
2606                  * take it all the way back down so we can try again */
2607                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2608                 goto restart;
2609         }
2610
2611         /* Send pointers to protocol/runtime uCode image ... init code will
2612          * load and launch runtime uCode, which will send us another "Alive"
2613          * notification. */
2614         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2615         if (iwl3945_set_ucode_ptrs(priv)) {
2616                 /* Runtime instruction load won't happen;
2617                  * take it all the way back down so we can try again */
2618                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2619                 goto restart;
2620         }
2621         return;
2622
2623  restart:
2624         queue_work(priv->workqueue, &priv->restart);
2625 }
2626
2627 /**
2628  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2629  *                   from protocol/runtime uCode (initialization uCode's
2630  *                   Alive gets handled by iwl3945_init_alive_start()).
2631  */
2632 static void iwl3945_alive_start(struct iwl_priv *priv)
2633 {
2634         int rc = 0;
2635         int thermal_spin = 0;
2636         u32 rfkill;
2637
2638         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2639
2640         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2641                 /* We had an error bringing up the hardware, so take it
2642                  * all the way back down so we can try again */
2643                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2644                 goto restart;
2645         }
2646
2647         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2648          * This is a paranoid check, because we would not have gotten the
2649          * "runtime" alive if code weren't properly loaded.  */
2650         if (iwl3945_verify_ucode(priv)) {
2651                 /* Runtime instruction load was bad;
2652                  * take it all the way back down so we can try again */
2653                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2654                 goto restart;
2655         }
2656
2657         priv->cfg->ops->smgmt->clear_station_table(priv);
2658
2659         rc = iwl_grab_nic_access(priv);
2660         if (rc) {
2661                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
2662                 return;
2663         }
2664
2665         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2666         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2667         iwl_release_nic_access(priv);
2668
2669         if (rfkill & 0x1) {
2670                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2671                 /* if RFKILL is not on, then wait for thermal
2672                  * sensor in adapter to kick in */
2673                 while (iwl3945_hw_get_temperature(priv) == 0) {
2674                         thermal_spin++;
2675                         udelay(10);
2676                 }
2677
2678                 if (thermal_spin)
2679                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2680                                        thermal_spin * 10);
2681         } else
2682                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2683
2684         /* After the ALIVE response, we can send commands to 3945 uCode */
2685         set_bit(STATUS_ALIVE, &priv->status);
2686
2687         /* Clear out the uCode error bit if it is set */
2688         clear_bit(STATUS_FW_ERROR, &priv->status);
2689
2690         if (iwl_is_rfkill(priv))
2691                 return;
2692
2693         ieee80211_wake_queues(priv->hw);
2694
2695         priv->active_rate = priv->rates_mask;
2696         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2697
2698         iwl_power_update_mode(priv, false);
2699
2700         if (iwl_is_associated(priv)) {
2701                 struct iwl3945_rxon_cmd *active_rxon =
2702                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2703
2704                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2705                        sizeof(priv->staging_rxon));
2706                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2707         } else {
2708                 /* Initialize our rx_config data */
2709                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2710         }
2711
2712         /* Configure Bluetooth device coexistence support */
2713         iwl_send_bt_config(priv);
2714
2715         /* Configure the adapter for unassociated operation */
2716         iwlcore_commit_rxon(priv);
2717
2718         iwl3945_reg_txpower_periodic(priv);
2719
2720         iwl3945_led_register(priv);
2721
2722         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2723         set_bit(STATUS_READY, &priv->status);
2724         wake_up_interruptible(&priv->wait_command_queue);
2725
2726         if (priv->error_recovering)
2727                 iwl3945_error_recovery(priv);
2728
2729         /* reassociate for ADHOC mode */
2730         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2731                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2732                                                                 priv->vif);
2733                 if (beacon)
2734                         iwl_mac_beacon_update(priv->hw, beacon);
2735         }
2736
2737         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2738                 iwl_set_mode(priv, priv->iw_mode);
2739
2740         return;
2741
2742  restart:
2743         queue_work(priv->workqueue, &priv->restart);
2744 }
2745
2746 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2747
2748 static void __iwl3945_down(struct iwl_priv *priv)
2749 {
2750         unsigned long flags;
2751         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2752         struct ieee80211_conf *conf = NULL;
2753
2754         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2755
2756         conf = ieee80211_get_hw_conf(priv->hw);
2757
2758         if (!exit_pending)
2759                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2760
2761         iwl3945_led_unregister(priv);
2762         priv->cfg->ops->smgmt->clear_station_table(priv);
2763
2764         /* Unblock any waiting calls */
2765         wake_up_interruptible_all(&priv->wait_command_queue);
2766
2767         /* Wipe out the EXIT_PENDING status bit if we are not actually
2768          * exiting the module */
2769         if (!exit_pending)
2770                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2771
2772         /* stop and reset the on-board processor */
2773         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2774
2775         /* tell the device to stop sending interrupts */
2776         spin_lock_irqsave(&priv->lock, flags);
2777         iwl_disable_interrupts(priv);
2778         spin_unlock_irqrestore(&priv->lock, flags);
2779         iwl_synchronize_irq(priv);
2780
2781         if (priv->mac80211_registered)
2782                 ieee80211_stop_queues(priv->hw);
2783
2784         /* If we have not previously called iwl3945_init() then
2785          * clear all bits but the RF Kill bits and return */
2786         if (!iwl_is_init(priv)) {
2787                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2788                                         STATUS_RF_KILL_HW |
2789                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2790                                         STATUS_RF_KILL_SW |
2791                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2792                                         STATUS_GEO_CONFIGURED |
2793                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2794                                         STATUS_EXIT_PENDING;
2795                 goto exit;
2796         }
2797
2798         /* ...otherwise clear out all the status bits but the RF Kill
2799          * bits and continue taking the NIC down. */
2800         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2801                                 STATUS_RF_KILL_HW |
2802                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2803                                 STATUS_RF_KILL_SW |
2804                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2805                                 STATUS_GEO_CONFIGURED |
2806                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2807                                 STATUS_FW_ERROR |
2808                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2809                                 STATUS_EXIT_PENDING;
2810
2811         priv->cfg->ops->lib->apm_ops.reset(priv);
2812         spin_lock_irqsave(&priv->lock, flags);
2813         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2814         spin_unlock_irqrestore(&priv->lock, flags);
2815
2816         iwl3945_hw_txq_ctx_stop(priv);
2817         iwl3945_hw_rxq_stop(priv);
2818
2819         spin_lock_irqsave(&priv->lock, flags);
2820         if (!iwl_grab_nic_access(priv)) {
2821                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2822                                          APMG_CLK_VAL_DMA_CLK_RQT);
2823                 iwl_release_nic_access(priv);
2824         }
2825         spin_unlock_irqrestore(&priv->lock, flags);
2826
2827         udelay(5);
2828
2829         if (exit_pending)
2830                 priv->cfg->ops->lib->apm_ops.stop(priv);
2831         else
2832                 priv->cfg->ops->lib->apm_ops.reset(priv);
2833
2834  exit:
2835         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2836
2837         if (priv->ibss_beacon)
2838                 dev_kfree_skb(priv->ibss_beacon);
2839         priv->ibss_beacon = NULL;
2840
2841         /* clear out any free frames */
2842         iwl3945_clear_free_frames(priv);
2843 }
2844
2845 static void iwl3945_down(struct iwl_priv *priv)
2846 {
2847         mutex_lock(&priv->mutex);
2848         __iwl3945_down(priv);
2849         mutex_unlock(&priv->mutex);
2850
2851         iwl3945_cancel_deferred_work(priv);
2852 }
2853
2854 #define MAX_HW_RESTARTS 5
2855
2856 static int __iwl3945_up(struct iwl_priv *priv)
2857 {
2858         int rc, i;
2859
2860         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2861                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2862                 return -EIO;
2863         }
2864
2865         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
2866                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
2867                             "parameter)\n");
2868                 return -ENODEV;
2869         }
2870
2871         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2872                 IWL_ERR(priv, "ucode not available for device bring up\n");
2873                 return -EIO;
2874         }
2875
2876         /* If platform's RF_KILL switch is NOT set to KILL */
2877         if (iwl_read32(priv, CSR_GP_CNTRL) &
2878                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2879                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2880         else {
2881                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2882                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2883                 return -ENODEV;
2884         }
2885
2886         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2887
2888         rc = iwl3945_hw_nic_init(priv);
2889         if (rc) {
2890                 IWL_ERR(priv, "Unable to int nic\n");
2891                 return rc;
2892         }
2893
2894         /* make sure rfkill handshake bits are cleared */
2895         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2896         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2897                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2898
2899         /* clear (again), then enable host interrupts */
2900         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2901         iwl_enable_interrupts(priv);
2902
2903         /* really make sure rfkill handshake bits are cleared */
2904         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2905         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2906
2907         /* Copy original ucode data image from disk into backup cache.
2908          * This will be used to initialize the on-board processor's
2909          * data SRAM for a clean start when the runtime program first loads. */
2910         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2911                priv->ucode_data.len);
2912
2913         /* We return success when we resume from suspend and rf_kill is on. */
2914         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2915                 return 0;
2916
2917         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2918
2919                 priv->cfg->ops->smgmt->clear_station_table(priv);
2920
2921                 /* load bootstrap state machine,
2922                  * load bootstrap program into processor's memory,
2923                  * prepare to load the "initialize" uCode */
2924                 priv->cfg->ops->lib->load_ucode(priv);
2925
2926                 if (rc) {
2927                         IWL_ERR(priv,
2928                                 "Unable to set up bootstrap uCode: %d\n", rc);
2929                         continue;
2930                 }
2931
2932                 /* start card; "initialize" will load runtime ucode */
2933                 iwl3945_nic_start(priv);
2934
2935                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2936
2937                 return 0;
2938         }
2939
2940         set_bit(STATUS_EXIT_PENDING, &priv->status);
2941         __iwl3945_down(priv);
2942         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2943
2944         /* tried to restart and config the device for as long as our
2945          * patience could withstand */
2946         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2947         return -EIO;
2948 }
2949
2950
2951 /*****************************************************************************
2952  *
2953  * Workqueue callbacks
2954  *
2955  *****************************************************************************/
2956
2957 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2958 {
2959         struct iwl_priv *priv =
2960             container_of(data, struct iwl_priv, init_alive_start.work);
2961
2962         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2963                 return;
2964
2965         mutex_lock(&priv->mutex);
2966         iwl3945_init_alive_start(priv);
2967         mutex_unlock(&priv->mutex);
2968 }
2969
2970 static void iwl3945_bg_alive_start(struct work_struct *data)
2971 {
2972         struct iwl_priv *priv =
2973             container_of(data, struct iwl_priv, alive_start.work);
2974
2975         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2976                 return;
2977
2978         mutex_lock(&priv->mutex);
2979         iwl3945_alive_start(priv);
2980         mutex_unlock(&priv->mutex);
2981 }
2982
2983 static void iwl3945_rfkill_poll(struct work_struct *data)
2984 {
2985         struct iwl_priv *priv =
2986             container_of(data, struct iwl_priv, rfkill_poll.work);
2987         unsigned long status = priv->status;
2988
2989         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2990                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2991         else
2992                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2993
2994         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
2995                 queue_work(priv->workqueue, &priv->rf_kill);
2996
2997         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2998                            round_jiffies_relative(2 * HZ));
2999
3000 }
3001
3002 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3003 static void iwl3945_bg_request_scan(struct work_struct *data)
3004 {
3005         struct iwl_priv *priv =
3006             container_of(data, struct iwl_priv, request_scan);
3007         struct iwl_host_cmd cmd = {
3008                 .id = REPLY_SCAN_CMD,
3009                 .len = sizeof(struct iwl3945_scan_cmd),
3010                 .meta.flags = CMD_SIZE_HUGE,
3011         };
3012         int rc = 0;
3013         struct iwl3945_scan_cmd *scan;
3014         struct ieee80211_conf *conf = NULL;
3015         u8 n_probes = 0;
3016         enum ieee80211_band band;
3017         bool is_active = false;
3018
3019         conf = ieee80211_get_hw_conf(priv->hw);
3020
3021         mutex_lock(&priv->mutex);
3022
3023         if (!iwl_is_ready(priv)) {
3024                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3025                 goto done;
3026         }
3027
3028         /* Make sure the scan wasn't canceled before this queued work
3029          * was given the chance to run... */
3030         if (!test_bit(STATUS_SCANNING, &priv->status))
3031                 goto done;
3032
3033         /* This should never be called or scheduled if there is currently
3034          * a scan active in the hardware. */
3035         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3036                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
3037                                 "Ignoring second request.\n");
3038                 rc = -EIO;
3039                 goto done;
3040         }
3041
3042         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3043                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
3044                 goto done;
3045         }
3046
3047         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3048                 IWL_DEBUG_HC(priv,
3049                         "Scan request while abort pending. Queuing.\n");
3050                 goto done;
3051         }
3052
3053         if (iwl_is_rfkill(priv)) {
3054                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
3055                 goto done;
3056         }
3057
3058         if (!test_bit(STATUS_READY, &priv->status)) {
3059                 IWL_DEBUG_HC(priv,
3060                         "Scan request while uninitialized. Queuing.\n");
3061                 goto done;
3062         }
3063
3064         if (!priv->scan_bands) {
3065                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
3066                 goto done;
3067         }
3068
3069         if (!priv->scan) {
3070                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3071                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3072                 if (!priv->scan) {
3073                         rc = -ENOMEM;
3074                         goto done;
3075                 }
3076         }
3077         scan = priv->scan;
3078         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3079
3080         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3081         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3082
3083         if (iwl_is_associated(priv)) {
3084                 u16 interval = 0;
3085                 u32 extra;
3086                 u32 suspend_time = 100;
3087                 u32 scan_suspend_time = 100;
3088                 unsigned long flags;
3089
3090                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
3091
3092                 spin_lock_irqsave(&priv->lock, flags);
3093                 interval = priv->beacon_int;
3094                 spin_unlock_irqrestore(&priv->lock, flags);
3095
3096                 scan->suspend_time = 0;
3097                 scan->max_out_time = cpu_to_le32(200 * 1024);
3098                 if (!interval)
3099                         interval = suspend_time;
3100                 /*
3101                  * suspend time format:
3102                  *  0-19: beacon interval in usec (time before exec.)
3103                  * 20-23: 0
3104                  * 24-31: number of beacons (suspend between channels)
3105                  */
3106
3107                 extra = (suspend_time / interval) << 24;
3108                 scan_suspend_time = 0xFF0FFFFF &
3109                     (extra | ((suspend_time % interval) * 1024));
3110
3111                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3112                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
3113                                scan_suspend_time, interval);
3114         }
3115
3116         if (priv->scan_request->n_ssids) {
3117                 int i, p = 0;
3118                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
3119                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
3120                         /* always does wildcard anyway */
3121                         if (!priv->scan_request->ssids[i].ssid_len)
3122                                 continue;
3123                         scan->direct_scan[p].id = WLAN_EID_SSID;
3124                         scan->direct_scan[p].len =
3125                                 priv->scan_request->ssids[i].ssid_len;
3126                         memcpy(scan->direct_scan[p].ssid,
3127                                priv->scan_request->ssids[i].ssid,
3128                                priv->scan_request->ssids[i].ssid_len);
3129                         n_probes++;
3130                         p++;
3131                 }
3132                 is_active = true;
3133         } else
3134                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
3135
3136         /* We don't build a direct scan probe request; the uCode will do
3137          * that based on the direct_mask added to each channel entry */
3138         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3139         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3140         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3141
3142         /* flags + rate selection */
3143
3144         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3145                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3146                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3147                 scan->good_CRC_th = 0;
3148                 band = IEEE80211_BAND_2GHZ;
3149         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3150                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3151                 /*
3152                  * If active scaning is requested but a certain channel
3153                  * is marked passive, we can do active scanning if we
3154                  * detect transmissions.
3155                  */
3156                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
3157                 band = IEEE80211_BAND_5GHZ;
3158         } else {
3159                 IWL_WARN(priv, "Invalid scan band count\n");
3160                 goto done;
3161         }
3162
3163         scan->tx_cmd.len = cpu_to_le16(
3164                         iwl_fill_probe_req(priv,
3165                                 (struct ieee80211_mgmt *)scan->data,
3166                                 priv->scan_request->ie,
3167                                 priv->scan_request->ie_len,
3168                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3169
3170         /* select Rx antennas */
3171         scan->flags |= iwl3945_get_antenna_flags(priv);
3172
3173         if (iwl_is_monitor_mode(priv))
3174                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3175
3176         scan->channel_count =
3177                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3178                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3179
3180         if (scan->channel_count == 0) {
3181                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3182                 goto done;
3183         }
3184
3185         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3186             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3187         cmd.data = scan;
3188         scan->len = cpu_to_le16(cmd.len);
3189
3190         set_bit(STATUS_SCAN_HW, &priv->status);
3191         rc = iwl_send_cmd_sync(priv, &cmd);
3192         if (rc)
3193                 goto done;
3194
3195         queue_delayed_work(priv->workqueue, &priv->scan_check,
3196                            IWL_SCAN_CHECK_WATCHDOG);
3197
3198         mutex_unlock(&priv->mutex);
3199         return;
3200
3201  done:
3202         /* can not perform scan make sure we clear scanning
3203          * bits from status so next scan request can be performed.
3204          * if we dont clear scanning status bit here all next scan
3205          * will fail
3206         */
3207         clear_bit(STATUS_SCAN_HW, &priv->status);
3208         clear_bit(STATUS_SCANNING, &priv->status);
3209
3210         /* inform mac80211 scan aborted */
3211         queue_work(priv->workqueue, &priv->scan_completed);
3212         mutex_unlock(&priv->mutex);
3213 }
3214
3215 static void iwl3945_bg_up(struct work_struct *data)
3216 {
3217         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3218
3219         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3220                 return;
3221
3222         mutex_lock(&priv->mutex);
3223         __iwl3945_up(priv);
3224         mutex_unlock(&priv->mutex);
3225         iwl_rfkill_set_hw_state(priv);
3226 }
3227
3228 static void iwl3945_bg_restart(struct work_struct *data)
3229 {
3230         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3231
3232         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3233                 return;
3234
3235         iwl3945_down(priv);
3236         queue_work(priv->workqueue, &priv->up);
3237 }
3238
3239 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3240 {
3241         struct iwl_priv *priv =
3242             container_of(data, struct iwl_priv, rx_replenish);
3243
3244         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3245                 return;
3246
3247         mutex_lock(&priv->mutex);
3248         iwl3945_rx_replenish(priv);
3249         mutex_unlock(&priv->mutex);
3250 }
3251
3252 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3253
3254 void iwl3945_post_associate(struct iwl_priv *priv)
3255 {
3256         int rc = 0;
3257         struct ieee80211_conf *conf = NULL;
3258
3259         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3260                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3261                 return;
3262         }
3263
3264
3265         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3266                         priv->assoc_id, priv->active_rxon.bssid_addr);
3267
3268         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3269                 return;
3270
3271         if (!priv->vif || !priv->is_open)
3272                 return;
3273
3274         iwl_scan_cancel_timeout(priv, 200);
3275
3276         conf = ieee80211_get_hw_conf(priv->hw);
3277
3278         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3279         iwlcore_commit_rxon(priv);
3280
3281         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3282         iwl3945_setup_rxon_timing(priv);
3283         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3284                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3285         if (rc)
3286                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3287                             "Attempting to continue.\n");
3288
3289         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3290
3291         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3292
3293         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3294                         priv->assoc_id, priv->beacon_int);
3295
3296         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3297                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3298         else
3299                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3300
3301         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3302                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3303                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3304                 else
3305                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3306
3307                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3308                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3309
3310         }
3311
3312         iwlcore_commit_rxon(priv);
3313
3314         switch (priv->iw_mode) {
3315         case NL80211_IFTYPE_STATION:
3316                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3317                 break;
3318
3319         case NL80211_IFTYPE_ADHOC:
3320
3321                 priv->assoc_id = 1;
3322                 priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 0, 0, NULL);
3323                 iwl3945_sync_sta(priv, IWL_STA_ID,
3324                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3325                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3326                                  CMD_ASYNC);
3327                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3328                 iwl3945_send_beacon_cmd(priv);
3329
3330                 break;
3331
3332         default:
3333                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3334                            __func__, priv->iw_mode);
3335                 break;
3336         }
3337
3338         iwl_activate_qos(priv, 0);
3339
3340         /* we have just associated, don't start scan too early */
3341         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3342 }
3343
3344 /*****************************************************************************
3345  *
3346  * mac80211 entry point functions
3347  *
3348  *****************************************************************************/
3349
3350 #define UCODE_READY_TIMEOUT     (2 * HZ)
3351
3352 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3353 {
3354         struct iwl_priv *priv = hw->priv;
3355         int ret;
3356
3357         IWL_DEBUG_MAC80211(priv, "enter\n");
3358
3359         /* we should be verifying the device is ready to be opened */
3360         mutex_lock(&priv->mutex);
3361
3362         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
3363         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3364          * ucode filename and max sizes are card-specific. */
3365
3366         if (!priv->ucode_code.len) {
3367                 ret = iwl3945_read_ucode(priv);
3368                 if (ret) {
3369                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3370                         mutex_unlock(&priv->mutex);
3371                         goto out_release_irq;
3372                 }
3373         }
3374
3375         ret = __iwl3945_up(priv);
3376
3377         mutex_unlock(&priv->mutex);
3378
3379         iwl_rfkill_set_hw_state(priv);
3380
3381         if (ret)
3382                 goto out_release_irq;
3383
3384         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3385
3386         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3387          * mac80211 will not be run successfully. */
3388         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3389                         test_bit(STATUS_READY, &priv->status),
3390                         UCODE_READY_TIMEOUT);
3391         if (!ret) {
3392                 if (!test_bit(STATUS_READY, &priv->status)) {
3393                         IWL_ERR(priv,
3394                                 "Wait for START_ALIVE timeout after %dms.\n",
3395                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3396                         ret = -ETIMEDOUT;
3397                         goto out_release_irq;
3398                 }
3399         }
3400
3401         /* ucode is running and will send rfkill notifications,
3402          * no need to poll the killswitch state anymore */
3403         cancel_delayed_work(&priv->rfkill_poll);
3404
3405         priv->is_open = 1;
3406         IWL_DEBUG_MAC80211(priv, "leave\n");
3407         return 0;
3408
3409 out_release_irq:
3410         priv->is_open = 0;
3411         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3412         return ret;
3413 }
3414
3415 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3416 {
3417         struct iwl_priv *priv = hw->priv;
3418
3419         IWL_DEBUG_MAC80211(priv, "enter\n");
3420
3421         if (!priv->is_open) {
3422                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3423                 return;
3424         }
3425
3426         priv->is_open = 0;
3427
3428         if (iwl_is_ready_rf(priv)) {
3429                 /* stop mac, cancel any scan request and clear
3430                  * RXON_FILTER_ASSOC_MSK BIT
3431                  */
3432                 mutex_lock(&priv->mutex);
3433                 iwl_scan_cancel_timeout(priv, 100);
3434                 mutex_unlock(&priv->mutex);
3435         }
3436
3437         iwl3945_down(priv);
3438
3439         flush_workqueue(priv->workqueue);
3440
3441         /* start polling the killswitch state again */
3442         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3443                            round_jiffies_relative(2 * HZ));
3444
3445         IWL_DEBUG_MAC80211(priv, "leave\n");
3446 }
3447
3448 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3449 {
3450         struct iwl_priv *priv = hw->priv;
3451
3452         IWL_DEBUG_MAC80211(priv, "enter\n");
3453
3454         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3455                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3456
3457         if (iwl3945_tx_skb(priv, skb))
3458                 dev_kfree_skb_any(skb);
3459
3460         IWL_DEBUG_MAC80211(priv, "leave\n");
3461         return NETDEV_TX_OK;
3462 }
3463
3464 void iwl3945_config_ap(struct iwl_priv *priv)
3465 {
3466         int rc = 0;
3467
3468         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3469                 return;
3470
3471         /* The following should be done only at AP bring up */
3472         if (!(iwl_is_associated(priv))) {
3473
3474                 /* RXON - unassoc (to set timing command) */
3475                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3476                 iwlcore_commit_rxon(priv);
3477
3478                 /* RXON Timing */
3479                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3480                 iwl3945_setup_rxon_timing(priv);
3481                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3482                                       sizeof(priv->rxon_timing),
3483                                       &priv->rxon_timing);
3484                 if (rc)
3485                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3486                                         "Attempting to continue.\n");
3487
3488                 /* FIXME: what should be the assoc_id for AP? */
3489                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3490                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3491                         priv->staging_rxon.flags |=
3492                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3493                 else
3494                         priv->staging_rxon.flags &=
3495                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3496
3497                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3498                         if (priv->assoc_capability &
3499                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3500                                 priv->staging_rxon.flags |=
3501                                         RXON_FLG_SHORT_SLOT_MSK;
3502                         else
3503                                 priv->staging_rxon.flags &=
3504                                         ~RXON_FLG_SHORT_SLOT_MSK;
3505
3506                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3507                                 priv->staging_rxon.flags &=
3508                                         ~RXON_FLG_SHORT_SLOT_MSK;
3509                 }
3510                 /* restore RXON assoc */
3511                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3512                 iwlcore_commit_rxon(priv);
3513                 priv->cfg->ops->smgmt->add_station(priv, iwl_bcast_addr, 0, 0, NULL);
3514         }
3515         iwl3945_send_beacon_cmd(priv);
3516
3517         /* FIXME - we need to add code here to detect a totally new
3518          * configuration, reset the AP, unassoc, rxon timing, assoc,
3519          * clear sta table, add BCAST sta... */
3520 }
3521
3522 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3523                                struct ieee80211_vif *vif,
3524                                struct ieee80211_sta *sta,
3525                                struct ieee80211_key_conf *key)
3526 {
3527         struct iwl_priv *priv = hw->priv;
3528         const u8 *addr;
3529         int ret = 0;
3530         u8 sta_id = IWL_INVALID_STATION;
3531         u8 static_key;
3532
3533         IWL_DEBUG_MAC80211(priv, "enter\n");
3534
3535         if (iwl3945_mod_params.sw_crypto) {
3536                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3537                 return -EOPNOTSUPP;
3538         }
3539
3540         addr = sta ? sta->addr : iwl_bcast_addr;
3541         static_key = !iwl_is_associated(priv);
3542
3543         if (!static_key) {
3544                 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
3545                 if (sta_id == IWL_INVALID_STATION) {
3546                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3547                                             addr);
3548                         return -EINVAL;
3549                 }
3550         }
3551
3552         mutex_lock(&priv->mutex);
3553         iwl_scan_cancel_timeout(priv, 100);
3554         mutex_unlock(&priv->mutex);
3555
3556         switch (cmd) {
3557         case SET_KEY:
3558                 if (static_key)
3559                         ret = iwl3945_set_static_key(priv, key);
3560                 else
3561                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3562                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3563                 break;
3564         case DISABLE_KEY:
3565                 if (static_key)
3566                         ret = iwl3945_remove_static_key(priv);
3567                 else
3568                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3569                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3570                 break;
3571         default:
3572                 ret = -EINVAL;
3573         }
3574
3575         IWL_DEBUG_MAC80211(priv, "leave\n");
3576
3577         return ret;
3578 }
3579
3580 /*****************************************************************************
3581  *
3582  * sysfs attributes
3583  *
3584  *****************************************************************************/
3585
3586 #ifdef CONFIG_IWLWIFI_DEBUG
3587
3588 /*
3589  * The following adds a new attribute to the sysfs representation
3590  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3591  * used for controlling the debug level.
3592  *
3593  * See the level definitions in iwl for details.
3594  */
3595 static ssize_t show_debug_level(struct device *d,
3596                                 struct device_attribute *attr, char *buf)
3597 {
3598         struct iwl_priv *priv = dev_get_drvdata(d);
3599
3600         return sprintf(buf, "0x%08X\n", priv->debug_level);
3601 }
3602 static ssize_t store_debug_level(struct device *d,
3603                                 struct device_attribute *attr,
3604                                  const char *buf, size_t count)
3605 {
3606         struct iwl_priv *priv = dev_get_drvdata(d);
3607         unsigned long val;
3608         int ret;
3609
3610         ret = strict_strtoul(buf, 0, &val);
3611         if (ret)
3612                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3613         else
3614                 priv->debug_level = val;
3615
3616         return strnlen(buf, count);
3617 }
3618
3619 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3620                         show_debug_level, store_debug_level);
3621
3622 #endif /* CONFIG_IWLWIFI_DEBUG */
3623
3624 static ssize_t show_temperature(struct device *d,
3625                                 struct device_attribute *attr, char *buf)
3626 {
3627         struct iwl_priv *priv = dev_get_drvdata(d);
3628
3629         if (!iwl_is_alive(priv))
3630                 return -EAGAIN;
3631
3632         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3633 }
3634
3635 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3636
3637 static ssize_t show_tx_power(struct device *d,
3638                              struct device_attribute *attr, char *buf)
3639 {
3640         struct iwl_priv *priv = dev_get_drvdata(d);
3641         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3642 }
3643
3644 static ssize_t store_tx_power(struct device *d,
3645                               struct device_attribute *attr,
3646                               const char *buf, size_t count)
3647 {
3648         struct iwl_priv *priv = dev_get_drvdata(d);
3649         char *p = (char *)buf;
3650         u32 val;
3651
3652         val = simple_strtoul(p, &p, 10);
3653         if (p == buf)
3654                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3655         else
3656                 iwl3945_hw_reg_set_txpower(priv, val);
3657
3658         return count;
3659 }
3660
3661 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3662
3663 static ssize_t show_flags(struct device *d,
3664                           struct device_attribute *attr, char *buf)
3665 {
3666         struct iwl_priv *priv = dev_get_drvdata(d);
3667
3668         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3669 }
3670
3671 static ssize_t store_flags(struct device *d,
3672                            struct device_attribute *attr,
3673                            const char *buf, size_t count)
3674 {
3675         struct iwl_priv *priv = dev_get_drvdata(d);
3676         u32 flags = simple_strtoul(buf, NULL, 0);
3677
3678         mutex_lock(&priv->mutex);
3679         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3680                 /* Cancel any currently running scans... */
3681                 if (iwl_scan_cancel_timeout(priv, 100))
3682                         IWL_WARN(priv, "Could not cancel scan.\n");
3683                 else {
3684                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3685                                        flags);
3686                         priv->staging_rxon.flags = cpu_to_le32(flags);
3687                         iwlcore_commit_rxon(priv);
3688                 }
3689         }
3690         mutex_unlock(&priv->mutex);
3691
3692         return count;
3693 }
3694
3695 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3696
3697 static ssize_t show_filter_flags(struct device *d,
3698                                  struct device_attribute *attr, char *buf)
3699 {
3700         struct iwl_priv *priv = dev_get_drvdata(d);
3701
3702         return sprintf(buf, "0x%04X\n",
3703                 le32_to_cpu(priv->active_rxon.filter_flags));
3704 }
3705
3706 static ssize_t store_filter_flags(struct device *d,
3707                                   struct device_attribute *attr,
3708                                   const char *buf, size_t count)
3709 {
3710         struct iwl_priv *priv = dev_get_drvdata(d);
3711         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3712
3713         mutex_lock(&priv->mutex);
3714         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3715                 /* Cancel any currently running scans... */
3716                 if (iwl_scan_cancel_timeout(priv, 100))
3717                         IWL_WARN(priv, "Could not cancel scan.\n");
3718                 else {
3719                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3720                                        "0x%04X\n", filter_flags);
3721                         priv->staging_rxon.filter_flags =
3722                                 cpu_to_le32(filter_flags);
3723                         iwlcore_commit_rxon(priv);
3724                 }
3725         }
3726         mutex_unlock(&priv->mutex);
3727
3728         return count;
3729 }
3730
3731 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3732                    store_filter_flags);
3733
3734 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3735
3736 static ssize_t show_measurement(struct device *d,
3737                                 struct device_attribute *attr, char *buf)
3738 {
3739         struct iwl_priv *priv = dev_get_drvdata(d);
3740         struct iwl_spectrum_notification measure_report;
3741         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3742         u8 *data = (u8 *)&measure_report;
3743         unsigned long flags;
3744
3745         spin_lock_irqsave(&priv->lock, flags);
3746         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3747                 spin_unlock_irqrestore(&priv->lock, flags);
3748                 return 0;
3749         }
3750         memcpy(&measure_report, &priv->measure_report, size);
3751         priv->measurement_status = 0;
3752         spin_unlock_irqrestore(&priv->lock, flags);
3753
3754         while (size && (PAGE_SIZE - len)) {
3755                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3756                                    PAGE_SIZE - len, 1);
3757                 len = strlen(buf);
3758                 if (PAGE_SIZE - len)
3759                         buf[len++] = '\n';
3760
3761                 ofs += 16;
3762                 size -= min(size, 16U);
3763         }
3764
3765         return len;
3766 }
3767
3768 static ssize_t store_measurement(struct device *d,
3769                                  struct device_attribute *attr,
3770                                  const char *buf, size_t count)
3771 {
3772         struct iwl_priv *priv = dev_get_drvdata(d);
3773         struct ieee80211_measurement_params params = {
3774                 .channel = le16_to_cpu(priv->active_rxon.channel),
3775                 .start_time = cpu_to_le64(priv->last_tsf),
3776                 .duration = cpu_to_le16(1),
3777         };
3778         u8 type = IWL_MEASURE_BASIC;
3779         u8 buffer[32];
3780         u8 channel;
3781
3782         if (count) {
3783                 char *p = buffer;
3784                 strncpy(buffer, buf, min(sizeof(buffer), count));
3785                 channel = simple_strtoul(p, NULL, 0);
3786                 if (channel)
3787                         params.channel = channel;
3788
3789                 p = buffer;
3790                 while (*p && *p != ' ')
3791                         p++;
3792                 if (*p)
3793                         type = simple_strtoul(p + 1, NULL, 0);
3794         }
3795
3796         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3797                        "channel %d (for '%s')\n", type, params.channel, buf);
3798         iwl3945_get_measurement(priv, &params, type);
3799
3800         return count;
3801 }
3802
3803 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3804                    show_measurement, store_measurement);
3805 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3806
3807 static ssize_t store_retry_rate(struct device *d,
3808                                 struct device_attribute *attr,
3809                                 const char *buf, size_t count)
3810 {
3811         struct iwl_priv *priv = dev_get_drvdata(d);
3812
3813         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3814         if (priv->retry_rate <= 0)
3815                 priv->retry_rate = 1;
3816
3817         return count;
3818 }
3819
3820 static ssize_t show_retry_rate(struct device *d,
3821                                struct device_attribute *attr, char *buf)
3822 {
3823         struct iwl_priv *priv = dev_get_drvdata(d);
3824         return sprintf(buf, "%d", priv->retry_rate);
3825 }
3826
3827 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3828                    store_retry_rate);
3829
3830
3831 static ssize_t store_power_level(struct device *d,
3832                                  struct device_attribute *attr,
3833                                  const char *buf, size_t count)
3834 {
3835         struct iwl_priv *priv = dev_get_drvdata(d);
3836         int ret;
3837         unsigned long mode;
3838
3839
3840         mutex_lock(&priv->mutex);
3841
3842         ret = strict_strtoul(buf, 10, &mode);
3843         if (ret)
3844                 goto out;
3845
3846         ret = iwl_power_set_user_mode(priv, mode);
3847         if (ret) {
3848                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3849                 goto out;
3850         }
3851         ret = count;
3852
3853  out:
3854         mutex_unlock(&priv->mutex);
3855         return ret;
3856 }
3857
3858 static ssize_t show_power_level(struct device *d,
3859                                 struct device_attribute *attr, char *buf)
3860 {
3861         struct iwl_priv *priv = dev_get_drvdata(d);
3862         int mode = priv->power_data.user_power_setting;
3863         int system = priv->power_data.system_power_setting;
3864         int level = priv->power_data.power_mode;
3865         char *p = buf;
3866
3867         switch (system) {
3868         case IWL_POWER_SYS_AUTO:
3869                 p += sprintf(p, "SYSTEM:auto");
3870                 break;
3871         case IWL_POWER_SYS_AC:
3872                 p += sprintf(p, "SYSTEM:ac");
3873                 break;
3874         case IWL_POWER_SYS_BATTERY:
3875                 p += sprintf(p, "SYSTEM:battery");
3876                 break;
3877         }
3878
3879         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3880                         "fixed" : "auto");
3881         p += sprintf(p, "\tINDEX:%d", level);
3882         p += sprintf(p, "\n");
3883         return p - buf + 1;
3884 }
3885
3886 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3887                    show_power_level, store_power_level);
3888
3889 #define MAX_WX_STRING 80
3890
3891 /* Values are in microsecond */
3892 static const s32 timeout_duration[] = {
3893         350000,
3894         250000,
3895         75000,
3896         37000,
3897         25000,
3898 };
3899 static const s32 period_duration[] = {
3900         400000,
3901         700000,
3902         1000000,
3903         1000000,
3904         1000000
3905 };
3906
3907 static ssize_t show_channels(struct device *d,
3908                              struct device_attribute *attr, char *buf)
3909 {
3910         /* all this shit doesn't belong into sysfs anyway */
3911         return 0;
3912 }
3913
3914 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3915
3916 static ssize_t show_statistics(struct device *d,
3917                                struct device_attribute *attr, char *buf)
3918 {
3919         struct iwl_priv *priv = dev_get_drvdata(d);
3920         u32 size = sizeof(struct iwl3945_notif_statistics);
3921         u32 len = 0, ofs = 0;
3922         u8 *data = (u8 *)&priv->statistics_39;
3923         int rc = 0;
3924
3925         if (!iwl_is_alive(priv))
3926                 return -EAGAIN;
3927
3928         mutex_lock(&priv->mutex);
3929         rc = iwl_send_statistics_request(priv, 0);
3930         mutex_unlock(&priv->mutex);
3931
3932         if (rc) {
3933                 len = sprintf(buf,
3934                               "Error sending statistics request: 0x%08X\n", rc);
3935                 return len;
3936         }
3937
3938         while (size && (PAGE_SIZE - len)) {
3939                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3940                                    PAGE_SIZE - len, 1);
3941                 len = strlen(buf);
3942                 if (PAGE_SIZE - len)
3943                         buf[len++] = '\n';
3944
3945                 ofs += 16;
3946                 size -= min(size, 16U);
3947         }
3948
3949         return len;
3950 }
3951
3952 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3953
3954 static ssize_t show_antenna(struct device *d,
3955                             struct device_attribute *attr, char *buf)
3956 {
3957         struct iwl_priv *priv = dev_get_drvdata(d);
3958
3959         if (!iwl_is_alive(priv))
3960                 return -EAGAIN;
3961
3962         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3963 }
3964
3965 static ssize_t store_antenna(struct device *d,
3966                              struct device_attribute *attr,
3967                              const char *buf, size_t count)
3968 {
3969         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3970         int ant;
3971
3972         if (count == 0)
3973                 return 0;
3974
3975         if (sscanf(buf, "%1i", &ant) != 1) {
3976                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3977                 return count;
3978         }
3979
3980         if ((ant >= 0) && (ant <= 2)) {
3981                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3982                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3983         } else
3984                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3985
3986
3987         return count;
3988 }
3989
3990 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3991
3992 static ssize_t show_status(struct device *d,
3993                            struct device_attribute *attr, char *buf)
3994 {
3995         struct iwl_priv *priv = dev_get_drvdata(d);
3996         if (!iwl_is_alive(priv))
3997                 return -EAGAIN;
3998         return sprintf(buf, "0x%08x\n", (int)priv->status);
3999 }
4000
4001 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4002
4003 static ssize_t dump_error_log(struct device *d,
4004                               struct device_attribute *attr,
4005                               const char *buf, size_t count)
4006 {
4007         struct iwl_priv *priv = dev_get_drvdata(d);
4008         char *p = (char *)buf;
4009
4010         if (p[0] == '1')
4011                 iwl3945_dump_nic_error_log(priv);
4012
4013         return strnlen(buf, count);
4014 }
4015
4016 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
4017
4018 static ssize_t dump_event_log(struct device *d,
4019                               struct device_attribute *attr,
4020                               const char *buf, size_t count)
4021 {
4022         struct iwl_priv *priv = dev_get_drvdata(d);
4023         char *p = (char *)buf;
4024
4025         if (p[0] == '1')
4026                 iwl3945_dump_nic_event_log(priv);
4027
4028         return strnlen(buf, count);
4029 }
4030
4031 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
4032
4033 /*****************************************************************************
4034  *
4035  * driver setup and tear down
4036  *
4037  *****************************************************************************/
4038
4039 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
4040 {
4041         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
4042
4043         init_waitqueue_head(&priv->wait_command_queue);
4044
4045         INIT_WORK(&priv->up, iwl3945_bg_up);
4046         INIT_WORK(&priv->restart, iwl3945_bg_restart);
4047         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
4048         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4049         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
4050         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
4051         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
4052         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
4053         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
4054         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
4055         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
4056         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
4057
4058         iwl3945_hw_setup_deferred_work(priv);
4059
4060         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4061                      iwl3945_irq_tasklet, (unsigned long)priv);
4062 }
4063
4064 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
4065 {
4066         iwl3945_hw_cancel_deferred_work(priv);
4067
4068         cancel_delayed_work_sync(&priv->init_alive_start);
4069         cancel_delayed_work(&priv->scan_check);
4070         cancel_delayed_work(&priv->alive_start);
4071         cancel_work_sync(&priv->beacon_update);
4072 }
4073
4074 static struct attribute *iwl3945_sysfs_entries[] = {
4075         &dev_attr_antenna.attr,
4076         &dev_attr_channels.attr,
4077         &dev_attr_dump_errors.attr,
4078         &dev_attr_dump_events.attr,
4079         &dev_attr_flags.attr,
4080         &dev_attr_filter_flags.attr,
4081 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4082         &dev_attr_measurement.attr,
4083 #endif
4084         &dev_attr_power_level.attr,
4085         &dev_attr_retry_rate.attr,
4086         &dev_attr_statistics.attr,
4087         &dev_attr_status.attr,
4088         &dev_attr_temperature.attr,
4089         &dev_attr_tx_power.attr,
4090 #ifdef CONFIG_IWLWIFI_DEBUG
4091         &dev_attr_debug_level.attr,
4092 #endif
4093         NULL
4094 };
4095
4096 static struct attribute_group iwl3945_attribute_group = {
4097         .name = NULL,           /* put in device directory */
4098         .attrs = iwl3945_sysfs_entries,
4099 };
4100
4101 static struct ieee80211_ops iwl3945_hw_ops = {
4102         .tx = iwl3945_mac_tx,
4103         .start = iwl3945_mac_start,
4104         .stop = iwl3945_mac_stop,
4105         .add_interface = iwl_mac_add_interface,
4106         .remove_interface = iwl_mac_remove_interface,
4107         .config = iwl_mac_config,
4108         .configure_filter = iwl_configure_filter,
4109         .set_key = iwl3945_mac_set_key,
4110         .get_tx_stats = iwl_mac_get_tx_stats,
4111         .conf_tx = iwl_mac_conf_tx,
4112         .reset_tsf = iwl_mac_reset_tsf,
4113         .bss_info_changed = iwl_bss_info_changed,
4114         .hw_scan = iwl_mac_hw_scan
4115 };
4116
4117 static int iwl3945_init_drv(struct iwl_priv *priv)
4118 {
4119         int ret;
4120         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4121
4122         priv->retry_rate = 1;
4123         priv->ibss_beacon = NULL;
4124
4125         spin_lock_init(&priv->lock);
4126         spin_lock_init(&priv->power_data.lock);
4127         spin_lock_init(&priv->sta_lock);
4128         spin_lock_init(&priv->hcmd_lock);
4129
4130         INIT_LIST_HEAD(&priv->free_frames);
4131
4132         mutex_init(&priv->mutex);
4133
4134         /* Clear the driver's (not device's) station table */
4135         priv->cfg->ops->smgmt->clear_station_table(priv);
4136
4137         priv->data_retry_limit = -1;
4138         priv->ieee_channels = NULL;
4139         priv->ieee_rates = NULL;
4140         priv->band = IEEE80211_BAND_2GHZ;
4141
4142         priv->iw_mode = NL80211_IFTYPE_STATION;
4143
4144         iwl_reset_qos(priv);
4145
4146         priv->qos_data.qos_active = 0;
4147         priv->qos_data.qos_cap.val = 0;
4148
4149         priv->rates_mask = IWL_RATES_MASK;
4150         /* If power management is turned on, default to CAM mode */
4151         priv->power_mode = IWL_POWER_MODE_CAM;
4152         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
4153
4154         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
4155                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4156                          eeprom->version);
4157                 ret = -EINVAL;
4158                 goto err;
4159         }
4160         ret = iwl_init_channel_map(priv);
4161         if (ret) {
4162                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
4163                 goto err;
4164         }
4165
4166         /* Set up txpower settings in driver for all channels */
4167         if (iwl3945_txpower_set_from_eeprom(priv)) {
4168                 ret = -EIO;
4169                 goto err_free_channel_map;
4170         }
4171
4172         ret = iwlcore_init_geos(priv);
4173         if (ret) {
4174                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
4175                 goto err_free_channel_map;
4176         }
4177         iwl3945_init_hw_rates(priv, priv->ieee_rates);
4178
4179         return 0;
4180
4181 err_free_channel_map:
4182         iwl_free_channel_map(priv);
4183 err:
4184         return ret;
4185 }
4186
4187 static int iwl3945_setup_mac(struct iwl_priv *priv)
4188 {
4189         int ret;
4190         struct ieee80211_hw *hw = priv->hw;
4191
4192         hw->rate_control_algorithm = "iwl-3945-rs";
4193         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
4194
4195         /* Tell mac80211 our characteristics */
4196         hw->flags = IEEE80211_HW_SIGNAL_DBM |
4197                     IEEE80211_HW_NOISE_DBM |
4198                     IEEE80211_HW_SPECTRUM_MGMT;
4199
4200         hw->wiphy->interface_modes =
4201                 BIT(NL80211_IFTYPE_STATION) |
4202                 BIT(NL80211_IFTYPE_ADHOC);
4203
4204         hw->wiphy->custom_regulatory = true;
4205
4206         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
4207         /* we create the 802.11 header and a zero-length SSID element */
4208         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
4209
4210         /* Default value; 4 EDCA QOS priorities */
4211         hw->queues = 4;
4212
4213         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4214                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4215                         &priv->bands[IEEE80211_BAND_2GHZ];
4216
4217         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4218                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4219                         &priv->bands[IEEE80211_BAND_5GHZ];
4220
4221         ret = ieee80211_register_hw(priv->hw);
4222         if (ret) {
4223                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
4224                 return ret;
4225         }
4226         priv->mac80211_registered = 1;
4227
4228         return 0;
4229 }
4230
4231 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4232 {
4233         int err = 0;
4234         struct iwl_priv *priv;
4235         struct ieee80211_hw *hw;
4236         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4237         struct iwl3945_eeprom *eeprom;
4238         unsigned long flags;
4239
4240         /***********************
4241          * 1. Allocating HW data
4242          * ********************/
4243
4244         /* mac80211 allocates memory for this device instance, including
4245          *   space for this driver's private structure */
4246         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4247         if (hw == NULL) {
4248                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4249                 err = -ENOMEM;
4250                 goto out;
4251         }
4252         priv = hw->priv;
4253         SET_IEEE80211_DEV(hw, &pdev->dev);
4254
4255         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
4256              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
4257                 IWL_ERR(priv,
4258                         "invalid queues_num, should be between %d and %d\n",
4259                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
4260                 err = -EINVAL;
4261                 goto out_ieee80211_free_hw;
4262         }
4263
4264         /*
4265          * Disabling hardware scan means that mac80211 will perform scans
4266          * "the hard way", rather than using device's scan.
4267          */
4268         if (iwl3945_mod_params.disable_hw_scan) {
4269                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4270                 iwl3945_hw_ops.hw_scan = NULL;
4271         }
4272
4273
4274         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4275         priv->cfg = cfg;
4276         priv->pci_dev = pdev;
4277
4278 #ifdef CONFIG_IWLWIFI_DEBUG
4279         priv->debug_level = iwl3945_mod_params.debug;
4280         atomic_set(&priv->restrict_refcnt, 0);
4281 #endif
4282
4283         /***************************
4284          * 2. Initializing PCI bus
4285          * *************************/
4286         if (pci_enable_device(pdev)) {
4287                 err = -ENODEV;
4288                 goto out_ieee80211_free_hw;
4289         }
4290
4291         pci_set_master(pdev);
4292
4293         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4294         if (!err)
4295                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4296         if (err) {
4297                 IWL_WARN(priv, "No suitable DMA available.\n");
4298                 goto out_pci_disable_device;
4299         }
4300
4301         pci_set_drvdata(pdev, priv);
4302         err = pci_request_regions(pdev, DRV_NAME);
4303         if (err)
4304                 goto out_pci_disable_device;
4305
4306         /***********************
4307          * 3. Read REV Register
4308          * ********************/
4309         priv->hw_base = pci_iomap(pdev, 0, 0);
4310         if (!priv->hw_base) {
4311                 err = -ENODEV;
4312                 goto out_pci_release_regions;
4313         }
4314
4315         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4316                         (unsigned long long) pci_resource_len(pdev, 0));
4317         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4318
4319         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4320          * PCI Tx retries from interfering with C3 CPU state */
4321         pci_write_config_byte(pdev, 0x41, 0x00);
4322
4323         /* amp init */
4324         err = priv->cfg->ops->lib->apm_ops.init(priv);
4325         if (err < 0) {
4326                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4327                 goto out_iounmap;
4328         }
4329
4330         /***********************
4331          * 4. Read EEPROM
4332          * ********************/
4333
4334         /* Read the EEPROM */
4335         err = iwl_eeprom_init(priv);
4336         if (err) {
4337                 IWL_ERR(priv, "Unable to init EEPROM\n");
4338                 goto out_iounmap;
4339         }
4340         /* MAC Address location in EEPROM same for 3945/4965 */
4341         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4342         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4343         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4344         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4345
4346         /***********************
4347          * 5. Setup HW Constants
4348          * ********************/
4349         /* Device-specific setup */
4350         if (iwl3945_hw_set_hw_params(priv)) {
4351                 IWL_ERR(priv, "failed to set hw settings\n");
4352                 goto out_eeprom_free;
4353         }
4354
4355         /***********************
4356          * 6. Setup priv
4357          * ********************/
4358
4359         err = iwl3945_init_drv(priv);
4360         if (err) {
4361                 IWL_ERR(priv, "initializing driver failed\n");
4362                 goto out_unset_hw_params;
4363         }
4364
4365         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4366                 priv->cfg->name);
4367
4368         /***********************
4369          * 7. Setup Services
4370          * ********************/
4371
4372         spin_lock_irqsave(&priv->lock, flags);
4373         iwl_disable_interrupts(priv);
4374         spin_unlock_irqrestore(&priv->lock, flags);
4375
4376         pci_enable_msi(priv->pci_dev);
4377
4378         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
4379                           DRV_NAME, priv);
4380         if (err) {
4381                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4382                 goto out_disable_msi;
4383         }
4384
4385         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4386         if (err) {
4387                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4388                 goto out_release_irq;
4389         }
4390
4391         iwl_set_rxon_channel(priv,
4392                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4393         iwl3945_setup_deferred_work(priv);
4394         iwl3945_setup_rx_handlers(priv);
4395
4396         /*********************************
4397          * 8. Setup and Register mac80211
4398          * *******************************/
4399
4400         iwl_enable_interrupts(priv);
4401
4402         err = iwl3945_setup_mac(priv);
4403         if (err)
4404                 goto  out_remove_sysfs;
4405
4406         err = iwl_dbgfs_register(priv, DRV_NAME);
4407         if (err)
4408                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4409
4410         err = iwl_rfkill_init(priv);
4411         if (err)
4412                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
4413                                   "Ignoring error: %d\n", err);
4414         else
4415                 iwl_rfkill_set_hw_state(priv);
4416
4417         /* Start monitoring the killswitch */
4418         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4419                            2 * HZ);
4420
4421         return 0;
4422
4423  out_remove_sysfs:
4424         destroy_workqueue(priv->workqueue);
4425         priv->workqueue = NULL;
4426         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4427  out_release_irq:
4428         free_irq(priv->pci_dev->irq, priv);
4429  out_disable_msi:
4430         pci_disable_msi(priv->pci_dev);
4431         iwlcore_free_geos(priv);
4432         iwl_free_channel_map(priv);
4433  out_unset_hw_params:
4434         iwl3945_unset_hw_params(priv);
4435  out_eeprom_free:
4436         iwl_eeprom_free(priv);
4437  out_iounmap:
4438         pci_iounmap(pdev, priv->hw_base);
4439  out_pci_release_regions:
4440         pci_release_regions(pdev);
4441  out_pci_disable_device:
4442         pci_set_drvdata(pdev, NULL);
4443         pci_disable_device(pdev);
4444  out_ieee80211_free_hw:
4445         ieee80211_free_hw(priv->hw);
4446  out:
4447         return err;
4448 }
4449
4450 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4451 {
4452         struct iwl_priv *priv = pci_get_drvdata(pdev);
4453         unsigned long flags;
4454
4455         if (!priv)
4456                 return;
4457
4458         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4459
4460         iwl_dbgfs_unregister(priv);
4461
4462         set_bit(STATUS_EXIT_PENDING, &priv->status);
4463
4464         if (priv->mac80211_registered) {
4465                 ieee80211_unregister_hw(priv->hw);
4466                 priv->mac80211_registered = 0;
4467         } else {
4468                 iwl3945_down(priv);
4469         }
4470
4471         /* make sure we flush any pending irq or
4472          * tasklet for the driver
4473          */
4474         spin_lock_irqsave(&priv->lock, flags);
4475         iwl_disable_interrupts(priv);
4476         spin_unlock_irqrestore(&priv->lock, flags);
4477
4478         iwl_synchronize_irq(priv);
4479
4480         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4481
4482         iwl_rfkill_unregister(priv);
4483         cancel_delayed_work_sync(&priv->rfkill_poll);
4484
4485         iwl3945_dealloc_ucode_pci(priv);
4486
4487         if (priv->rxq.bd)
4488                 iwl3945_rx_queue_free(priv, &priv->rxq);
4489         iwl3945_hw_txq_ctx_free(priv);
4490
4491         iwl3945_unset_hw_params(priv);
4492         priv->cfg->ops->smgmt->clear_station_table(priv);
4493
4494         /*netif_stop_queue(dev); */
4495         flush_workqueue(priv->workqueue);
4496
4497         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4498          * priv->workqueue... so we can't take down the workqueue
4499          * until now... */
4500         destroy_workqueue(priv->workqueue);
4501         priv->workqueue = NULL;
4502
4503         free_irq(pdev->irq, priv);
4504         pci_disable_msi(pdev);
4505
4506         pci_iounmap(pdev, priv->hw_base);
4507         pci_release_regions(pdev);
4508         pci_disable_device(pdev);
4509         pci_set_drvdata(pdev, NULL);
4510
4511         iwl_free_channel_map(priv);
4512         iwlcore_free_geos(priv);
4513         kfree(priv->scan);
4514         if (priv->ibss_beacon)
4515                 dev_kfree_skb(priv->ibss_beacon);
4516
4517         ieee80211_free_hw(priv->hw);
4518 }
4519
4520
4521 /*****************************************************************************
4522  *
4523  * driver and module entry point
4524  *
4525  *****************************************************************************/
4526
4527 static struct pci_driver iwl3945_driver = {
4528         .name = DRV_NAME,
4529         .id_table = iwl3945_hw_card_ids,
4530         .probe = iwl3945_pci_probe,
4531         .remove = __devexit_p(iwl3945_pci_remove),
4532 #ifdef CONFIG_PM
4533         .suspend = iwl_pci_suspend,
4534         .resume = iwl_pci_resume,
4535 #endif
4536 };
4537
4538 static int __init iwl3945_init(void)
4539 {
4540
4541         int ret;
4542         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4543         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4544
4545         ret = iwl3945_rate_control_register();
4546         if (ret) {
4547                 printk(KERN_ERR DRV_NAME
4548                        "Unable to register rate control algorithm: %d\n", ret);
4549                 return ret;
4550         }
4551
4552         ret = pci_register_driver(&iwl3945_driver);
4553         if (ret) {
4554                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4555                 goto error_register;
4556         }
4557
4558         return ret;
4559
4560 error_register:
4561         iwl3945_rate_control_unregister();
4562         return ret;
4563 }
4564
4565 static void __exit iwl3945_exit(void)
4566 {
4567         pci_unregister_driver(&iwl3945_driver);
4568         iwl3945_rate_control_unregister();
4569 }
4570
4571 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4572
4573 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4574 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4575 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4576 MODULE_PARM_DESC(swcrypto,
4577                  "using software crypto (default 1 [software])\n");
4578 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
4579 MODULE_PARM_DESC(debug, "debug output mask");
4580 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4581 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4582
4583 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
4584 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4585
4586 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4587 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4588
4589 module_exit(iwl3945_exit);
4590 module_init(iwl3945_init);