drivers/net/wireless/iwlegacy/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/pci.h>
  36 #include <linux/pci-aspm.h>
  37 #include <linux/slab.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/sched.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/wireless.h>
  44 #include <linux/firmware.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/if_arp.h>
  47
  48 #include <net/ieee80211_radiotap.h>
  49 #include <net/mac80211.h>
  50
  51 #include <asm/div64.h>
  52
  53 #define DRV_NAME        "iwl3945"
  54
  55 #include "iwl-fh.h"
  56 #include "iwl-3945-fh.h"
  57 #include "iwl-commands.h"
  58 #include "iwl-sta.h"
  59 #include "iwl-3945.h"
  60 #include "iwl-core.h"
  61 #include "iwl-helpers.h"
  62 #include "iwl-dev.h"
  63 #include "iwl-spectrum.h"
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  */
  68
  69 #define DRV_DESCRIPTION \
  70 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 /*
  79  * add "s" to indicate spectrum measurement included.
  80  * we add it here to be consistent with previous releases in which
  81  * this was configurable.
  82  */
  83 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  84 #define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
  85 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  86
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_VERSION(DRV_VERSION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  90 MODULE_LICENSE("GPL");
  91
  92  /* module parameters */
  93 struct iwl_mod_params iwl3945_mod_params = {
  94         .sw_crypto = 1,
  95         .restart_fw = 1,
  96         .disable_hw_scan = 1,
  97         /* the rest are 0 by default */
  98 };
  99
 100 /**
 101  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 102  * @priv: eeprom and antenna fields are used to determine antenna flags
 103  *
 104  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 105  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 106  *
 107  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 108  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 109  * IWL_ANTENNA_AUX       - Force AUX antenna
 110  */
 111 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 112 {
 113         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 114
 115         switch (iwl3945_mod_params.antenna) {
 116         case IWL_ANTENNA_DIVERSITY:
 117                 return 0;
 118
 119         case IWL_ANTENNA_MAIN:
 120                 if (eeprom->antenna_switch_type)
 121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 123
 124         case IWL_ANTENNA_AUX:
 125                 if (eeprom->antenna_switch_type)
 126                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 127                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 128         }
 129
 130         /* bad antenna selector value */
 131         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 132                 iwl3945_mod_params.antenna);
 133
 134         return 0;               /* "diversity" is default if error */
 135 }
 136
 137 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 138                                    struct ieee80211_key_conf *keyconf,
 139                                    u8 sta_id)
 140 {
 141         unsigned long flags;
 142         __le16 key_flags = 0;
 143         int ret;
 144
 145         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 146         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 147
 148         if (sta_id == priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id)
 149                 key_flags |= STA_KEY_MULTICAST_MSK;
 150
 151         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 152         keyconf->hw_key_idx = keyconf->keyidx;
 153         key_flags &= ~STA_KEY_FLG_INVALID;
 154
 155         spin_lock_irqsave(&priv->sta_lock, flags);
 156         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 157         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 158         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 159                keyconf->keylen);
 160
 161         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 162                keyconf->keylen);
 163
 164         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 165                         == STA_KEY_FLG_NO_ENC)
 166                 priv->stations[sta_id].sta.key.key_offset =
 167                                  iwl_legacy_get_free_ucode_key_index(priv);
 168         /* else, we are overriding an existing key => no need to allocated room
 169         * in uCode. */
 170
 171         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 172                 "no space for a new key");
 173
 174         priv->stations[sta_id].sta.key.key_flags = key_flags;
 175         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 176         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 177
 178         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 179
 180         ret = iwl_legacy_send_add_sta(priv,
 181                                 &priv->stations[sta_id].sta, CMD_ASYNC);
 182
 183         spin_unlock_irqrestore(&priv->sta_lock, flags);
 184
 185         return ret;
 186 }
 187
 188 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 189                                   struct ieee80211_key_conf *keyconf,
 190                                   u8 sta_id)
 191 {
 192         return -EOPNOTSUPP;
 193 }
 194
 195 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 196                                   struct ieee80211_key_conf *keyconf,
 197                                   u8 sta_id)
 198 {
 199         return -EOPNOTSUPP;
 200 }
 201
 202 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 203 {
 204         unsigned long flags;
 205         struct iwl_legacy_addsta_cmd sta_cmd;
 206
 207         spin_lock_irqsave(&priv->sta_lock, flags);
 208         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 209         memset(&priv->stations[sta_id].sta.key, 0,
 210                 sizeof(struct iwl4965_keyinfo));
 211         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 212         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 213         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 214         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_legacy_addsta_cmd));
 215         spin_unlock_irqrestore(&priv->sta_lock, flags);
 216
 217         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 218         return iwl_legacy_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 219 }
 220
 221 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 222                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 223 {
 224         int ret = 0;
 225
 226         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 227
 228         switch (keyconf->cipher) {
 229         case WLAN_CIPHER_SUITE_CCMP:
 230                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         case WLAN_CIPHER_SUITE_TKIP:
 233                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 234                 break;
 235         case WLAN_CIPHER_SUITE_WEP40:
 236         case WLAN_CIPHER_SUITE_WEP104:
 237                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 238                 break;
 239         default:
 240                 IWL_ERR(priv, "Unknown alg: %s alg=%x\n", __func__,
 241                         keyconf->cipher);
 242                 ret = -EINVAL;
 243         }
 244
 245         IWL_DEBUG_WEP(priv, "Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 246                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 247                       sta_id, ret);
 248
 249         return ret;
 250 }
 251
 252 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 253 {
 254         int ret = -EOPNOTSUPP;
 255
 256         return ret;
 257 }
 258
 259 static int iwl3945_set_static_key(struct iwl_priv *priv,
 260                                 struct ieee80211_key_conf *key)
 261 {
 262         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 263             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 264                 return -EOPNOTSUPP;
 265
 266         IWL_ERR(priv, "Static key invalid: cipher %x\n", key->cipher);
 267         return -EINVAL;
 268 }
 269
 270 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 271 {
 272         struct list_head *element;
 273
 274         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 275                        priv->frames_count);
 276
 277         while (!list_empty(&priv->free_frames)) {
 278                 element = priv->free_frames.next;
 279                 list_del(element);
 280                 kfree(list_entry(element, struct iwl3945_frame, list));
 281                 priv->frames_count--;
 282         }
 283
 284         if (priv->frames_count) {
 285                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 286                             priv->frames_count);
 287                 priv->frames_count = 0;
 288         }
 289 }
 290
 291 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 292 {
 293         struct iwl3945_frame *frame;
 294         struct list_head *element;
 295         if (list_empty(&priv->free_frames)) {
 296                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 297                 if (!frame) {
 298                         IWL_ERR(priv, "Could not allocate frame!\n");
 299                         return NULL;
 300                 }
 301
 302                 priv->frames_count++;
 303                 return frame;
 304         }
 305
 306         element = priv->free_frames.next;
 307         list_del(element);
 308         return list_entry(element, struct iwl3945_frame, list);
 309 }
 310
 311 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 312 {
 313         memset(frame, 0, sizeof(*frame));
 314         list_add(&frame->list, &priv->free_frames);
 315 }
 316
 317 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 318                                 struct ieee80211_hdr *hdr,
 319                                 int left)
 320 {
 321
 322         if (!iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS) || !priv->beacon_skb)
 323                 return 0;
 324
 325         if (priv->beacon_skb->len > left)
 326                 return 0;
 327
 328         memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len);
 329
 330         return priv->beacon_skb->len;
 331 }
 332
 333 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 334 {
 335         struct iwl3945_frame *frame;
 336         unsigned int frame_size;
 337         int rc;
 338         u8 rate;
 339
 340         frame = iwl3945_get_free_frame(priv);
 341
 342         if (!frame) {
 343                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 344                           "command.\n");
 345                 return -ENOMEM;
 346         }
 347
 348         rate = iwl_legacy_get_lowest_plcp(priv,
 349                                 &priv->contexts[IWL_RXON_CTX_BSS]);
 350
 351         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 352
 353         rc = iwl_legacy_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 354                               &frame->u.cmd[0]);
 355
 356         iwl3945_free_frame(priv, frame);
 357
 358         return rc;
 359 }
 360
 361 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 362 {
 363         if (priv->_3945.shared_virt)
 364                 dma_free_coherent(&priv->pci_dev->dev,
 365                                   sizeof(struct iwl3945_shared),
 366                                   priv->_3945.shared_virt,
 367                                   priv->_3945.shared_phys);
 368 }
 369
 370 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 371                                       struct ieee80211_tx_info *info,
 372                                       struct iwl_device_cmd *cmd,
 373                                       struct sk_buff *skb_frag,
 374                                       int sta_id)
 375 {
 376         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 377         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 378
 379         tx_cmd->sec_ctl = 0;
 380
 381         switch (keyinfo->cipher) {
 382         case WLAN_CIPHER_SUITE_CCMP:
 383                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 384                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 385                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 386                 break;
 387
 388         case WLAN_CIPHER_SUITE_TKIP:
 389                 break;
 390
 391         case WLAN_CIPHER_SUITE_WEP104:
 392                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 393                 /* fall through */
 394         case WLAN_CIPHER_SUITE_WEP40:
 395                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 396                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 397
 398                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 399
 400                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 401                              "with key %d\n", info->control.hw_key->hw_key_idx);
 402                 break;
 403
 404         default:
 405                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyinfo->cipher);
 406                 break;
 407         }
 408 }
 409
 410 /*
 411  * handle build REPLY_TX command notification.
 412  */
 413 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 414                                   struct iwl_device_cmd *cmd,
 415                                   struct ieee80211_tx_info *info,
 416                                   struct ieee80211_hdr *hdr, u8 std_id)
 417 {
 418         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 419         __le32 tx_flags = tx_cmd->tx_flags;
 420         __le16 fc = hdr->frame_control;
 421
 422         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 423         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 424                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 425                 if (ieee80211_is_mgmt(fc))
 426                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 427                 if (ieee80211_is_probe_resp(fc) &&
 428                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 429                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 430         } else {
 431                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 432                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 433         }
 434
 435         tx_cmd->sta_id = std_id;
 436         if (ieee80211_has_morefrags(fc))
 437                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 438
 439         if (ieee80211_is_data_qos(fc)) {
 440                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 441                 tx_cmd->tid_tspec = qc[0] & 0xf;
 442                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 443         } else {
 444                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 445         }
 446
 447         iwl_legacy_tx_cmd_protection(priv, info, fc, &tx_flags);
 448
 449         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 450         if (ieee80211_is_mgmt(fc)) {
 451                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 452                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 453                 else
 454                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 455         } else {
 456                 tx_cmd->timeout.pm_frame_timeout = 0;
 457         }
 458
 459         tx_cmd->driver_txop = 0;
 460         tx_cmd->tx_flags = tx_flags;
 461         tx_cmd->next_frame_len = 0;
 462 }
 463
 464 /*
 465  * start REPLY_TX command process
 466  */
 467 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 468 {
 469         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 470         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 471         struct iwl3945_tx_cmd *tx_cmd;
 472         struct iwl_tx_queue *txq = NULL;
 473         struct iwl_queue *q = NULL;
 474         struct iwl_device_cmd *out_cmd;
 475         struct iwl_cmd_meta *out_meta;
 476         dma_addr_t phys_addr;
 477         dma_addr_t txcmd_phys;
 478         int txq_id = skb_get_queue_mapping(skb);
 479         u16 len, idx, hdr_len;
 480         u8 id;
 481         u8 unicast;
 482         u8 sta_id;
 483         u8 tid = 0;
 484         __le16 fc;
 485         u8 wait_write_ptr = 0;
 486         unsigned long flags;
 487
 488         spin_lock_irqsave(&priv->lock, flags);
 489         if (iwl_legacy_is_rfkill(priv)) {
 490                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 491                 goto drop_unlock;
 492         }
 493
 494         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 495                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 496                 goto drop_unlock;
 497         }
 498
 499         unicast = !is_multicast_ether_addr(hdr->addr1);
 500         id = 0;
 501
 502         fc = hdr->frame_control;
 503
 504 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 505         if (ieee80211_is_auth(fc))
 506                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 507         else if (ieee80211_is_assoc_req(fc))
 508                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 509         else if (ieee80211_is_reassoc_req(fc))
 510                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 511 #endif
 512
 513         spin_unlock_irqrestore(&priv->lock, flags);
 514
 515         hdr_len = ieee80211_hdrlen(fc);
 516
 517         /* Find index into station table for destination station */
 518         sta_id = iwl_legacy_sta_id_or_broadcast(
 519                         priv, &priv->contexts[IWL_RXON_CTX_BSS],
 520                         info->control.sta);
 521         if (sta_id == IWL_INVALID_STATION) {
 522                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 523                                hdr->addr1);
 524                 goto drop;
 525         }
 526
 527         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 528
 529         if (ieee80211_is_data_qos(fc)) {
 530                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 531                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 532                 if (unlikely(tid >= MAX_TID_COUNT))
 533                         goto drop;
 534         }
 535
 536         /* Descriptor for chosen Tx queue */
 537         txq = &priv->txq[txq_id];
 538         q = &txq->q;
 539
 540         if ((iwl_legacy_queue_space(q) < q->high_mark))
 541                 goto drop;
 542
 543         spin_lock_irqsave(&priv->lock, flags);
 544
 545         idx = iwl_legacy_get_cmd_index(q, q->write_ptr, 0);
 546
 547         /* Set up driver data for this TFD */
 548         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 549         txq->txb[q->write_ptr].skb = skb;
 550         txq->txb[q->write_ptr].ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 551
 552         /* Init first empty entry in queue's array of Tx/cmd buffers */
 553         out_cmd = txq->cmd[idx];
 554         out_meta = &txq->meta[idx];
 555         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 556         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 557         memset(tx_cmd, 0, sizeof(*tx_cmd));
 558
 559         /*
 560          * Set up the Tx-command (not MAC!) header.
 561          * Store the chosen Tx queue and TFD index within the sequence field;
 562          * after Tx, uCode's Tx response will return this value so driver can
 563          * locate the frame within the tx queue and do post-tx processing.
 564          */
 565         out_cmd->hdr.cmd = REPLY_TX;
 566         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 567                                 INDEX_TO_SEQ(q->write_ptr)));
 568
 569         /* Copy MAC header from skb into command buffer */
 570         memcpy(tx_cmd->hdr, hdr, hdr_len);
 571
 572
 573         if (info->control.hw_key)
 574                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 575
 576         /* TODO need this for burst mode later on */
 577         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 578
 579         /* set is_hcca to 0; it probably will never be implemented */
 580         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 581
 582         /* Total # bytes to be transmitted */
 583         len = (u16)skb->len;
 584         tx_cmd->len = cpu_to_le16(len);
 585
 586         iwl_legacy_dbg_log_tx_data_frame(priv, len, hdr);
 587         iwl_legacy_update_stats(priv, true, fc, len);
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 589         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 590
 591         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 592                 txq->need_update = 1;
 593         } else {
 594                 wait_write_ptr = 1;
 595                 txq->need_update = 0;
 596         }
 597
 598         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 599                      le16_to_cpu(out_cmd->hdr.sequence));
 600         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 601         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 602         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 603                            ieee80211_hdrlen(fc));
 604
 605         /*
 606          * Use the first empty entry in this queue's command buffer array
 607          * to contain the Tx command and MAC header concatenated together
 608          * (payload data will be in another buffer).
 609          * Size of this varies, due to varying MAC header length.
 610          * If end is not dword aligned, we'll have 2 extra bytes at the end
 611          * of the MAC header (device reads on dword boundaries).
 612          * We'll tell device about this padding later.
 613          */
 614         len = sizeof(struct iwl3945_tx_cmd) +
 615                         sizeof(struct iwl_cmd_header) + hdr_len;
 616         len = (len + 3) & ~3;
 617
 618         /* Physical address of this Tx command's header (not MAC header!),
 619          * within command buffer array. */
 620         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 621                                     len, PCI_DMA_TODEVICE);
 622         /* we do not map meta data ... so we can safely access address to
 623          * provide to unmap command*/
 624         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 625         dma_unmap_len_set(out_meta, len, len);
 626
 627         /* Add buffer containing Tx command and MAC(!) header to TFD's
 628          * first entry */
 629         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 630                                                    txcmd_phys, len, 1, 0);
 631
 632
 633         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 634          * if any (802.11 null frames have no payload). */
 635         len = skb->len - hdr_len;
 636         if (len) {
 637                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 638                                            len, PCI_DMA_TODEVICE);
 639                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 640                                                            phys_addr, len,
 641                                                            0, U32_PAD(len));
 642         }
 643
 644
 645         /* Tell device the write index *just past* this latest filled TFD */
 646         q->write_ptr = iwl_legacy_queue_inc_wrap(q->write_ptr, q->n_bd);
 647         iwl_legacy_txq_update_write_ptr(priv, txq);
 648         spin_unlock_irqrestore(&priv->lock, flags);
 649
 650         if ((iwl_legacy_queue_space(q) < q->high_mark)
 651             && priv->mac80211_registered) {
 652                 if (wait_write_ptr) {
 653                         spin_lock_irqsave(&priv->lock, flags);
 654                         txq->need_update = 1;
 655                         iwl_legacy_txq_update_write_ptr(priv, txq);
 656                         spin_unlock_irqrestore(&priv->lock, flags);
 657                 }
 658
 659                 iwl_legacy_stop_queue(priv, txq);
 660         }
 661
 662         return 0;
 663
 664 drop_unlock:
 665         spin_unlock_irqrestore(&priv->lock, flags);
 666 drop:
 667         return -1;
 668 }
 669
 670 static int iwl3945_get_measurement(struct iwl_priv *priv,
 671                                struct ieee80211_measurement_params *params,
 672                                u8 type)
 673 {
 674         struct iwl_spectrum_cmd spectrum;
 675         struct iwl_rx_packet *pkt;
 676         struct iwl_host_cmd cmd = {
 677                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 678                 .data = (void *)&spectrum,
 679                 .flags = CMD_WANT_SKB,
 680         };
 681         u32 add_time = le64_to_cpu(params->start_time);
 682         int rc;
 683         int spectrum_resp_status;
 684         int duration = le16_to_cpu(params->duration);
 685         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 686
 687         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS))
 688                 add_time = iwl_legacy_usecs_to_beacons(priv,
 689                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 690                         le16_to_cpu(ctx->timing.beacon_interval));
 691
 692         memset(&spectrum, 0, sizeof(spectrum));
 693
 694         spectrum.channel_count = cpu_to_le16(1);
 695         spectrum.flags =
 696             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 697         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 698         cmd.len = sizeof(spectrum);
 699         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 700
 701         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS))
 702                 spectrum.start_time =
 703                         iwl_legacy_add_beacon_time(priv,
 704                                 priv->_3945.last_beacon_time, add_time,
 705                                 le16_to_cpu(ctx->timing.beacon_interval));
 706         else
 707                 spectrum.start_time = 0;
 708
 709         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 710         spectrum.channels[0].channel = params->channel;
 711         spectrum.channels[0].type = type;
 712         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 713                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 714                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 715
 716         rc = iwl_legacy_send_cmd_sync(priv, &cmd);
 717         if (rc)
 718                 return rc;
 719
 720         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 721         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 722                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 723                 rc = -EIO;
 724         }
 725
 726         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 727         switch (spectrum_resp_status) {
 728         case 0:         /* Command will be handled */
 729                 if (pkt->u.spectrum.id != 0xff) {
 730                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 731                                                 pkt->u.spectrum.id);
 732                         priv->measurement_status &= ~MEASUREMENT_READY;
 733                 }
 734                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 735                 rc = 0;
 736                 break;
 737
 738         case 1:         /* Command will not be handled */
 739                 rc = -EAGAIN;
 740                 break;
 741         }
 742
 743         iwl_legacy_free_pages(priv, cmd.reply_page);
 744
 745         return rc;
 746 }
 747
 748 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 749                                struct iwl_rx_mem_buffer *rxb)
 750 {
 751         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 752         struct iwl_alive_resp *palive;
 753         struct delayed_work *pwork;
 754
 755         palive = &pkt->u.alive_frame;
 756
 757         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 758                        "0x%01X 0x%01X\n",
 759                        palive->is_valid, palive->ver_type,
 760                        palive->ver_subtype);
 761
 762         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 763                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 764                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 765                        sizeof(struct iwl_alive_resp));
 766                 pwork = &priv->init_alive_start;
 767         } else {
 768                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 769                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 770                        sizeof(struct iwl_alive_resp));
 771                 pwork = &priv->alive_start;
 772                 iwl3945_disable_events(priv);
 773         }
 774
 775         /* We delay the ALIVE response by 5ms to
 776          * give the HW RF Kill time to activate... */
 777         if (palive->is_valid == UCODE_VALID_OK)
 778                 queue_delayed_work(priv->workqueue, pwork,
 779                                    msecs_to_jiffies(5));
 780         else
 781                 IWL_WARN(priv, "uCode did not respond OK.\n");
 782 }
 783
 784 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 785                                  struct iwl_rx_mem_buffer *rxb)
 786 {
 787 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 788         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 789 #endif
 790
 791         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 792 }
 793
 794 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 795                                 struct iwl_rx_mem_buffer *rxb)
 796 {
 797         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 798         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 799 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 800         u8 rate = beacon->beacon_notify_hdr.rate;
 801
 802         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 803                 "tsf %d %d rate %d\n",
 804                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 805                 beacon->beacon_notify_hdr.failure_frame,
 806                 le32_to_cpu(beacon->ibss_mgr_status),
 807                 le32_to_cpu(beacon->high_tsf),
 808                 le32_to_cpu(beacon->low_tsf), rate);
 809 #endif
 810
 811         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 812
 813 }
 814
 815 /* Handle notification from uCode that card's power state is changing
 816  * due to software, hardware, or critical temperature RFKILL */
 817 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 818                                     struct iwl_rx_mem_buffer *rxb)
 819 {
 820         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 821         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 822         unsigned long status = priv->status;
 823
 824         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 825                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 826                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 827
 828         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 829                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 830
 831         if (flags & HW_CARD_DISABLED)
 832                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 833         else
 834                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 835
 836
 837         iwl_legacy_scan_cancel(priv);
 838
 839         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 840              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 841                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 842                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 843         else
 844                 wake_up(&priv->wait_command_queue);
 845 }
 846
 847 /**
 848  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 849  *
 850  * Setup the RX handlers for each of the reply types sent from the uCode
 851  * to the host.
 852  *
 853  * This function chains into the hardware specific files for them to setup
 854  * any hardware specific handlers as well.
 855  */
 856 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 857 {
 858         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 859         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 860         priv->rx_handlers[REPLY_ERROR] = iwl_legacy_rx_reply_error;
 861         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_legacy_rx_csa;
 862         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 863                         iwl_legacy_rx_spectrum_measure_notif;
 864         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_legacy_rx_pm_sleep_notif;
 865         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 866             iwl_legacy_rx_pm_debug_statistics_notif;
 867         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 868
 869         /*
 870          * The same handler is used for both the REPLY to a discrete
 871          * statistics request from the host as well as for the periodic
 872          * statistics notifications (after received beacons) from the uCode.
 873          */
 874         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 875         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 876
 877         iwl_legacy_setup_rx_scan_handlers(priv);
 878         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 879
 880         /* Set up hardware specific Rx handlers */
 881         iwl3945_hw_rx_handler_setup(priv);
 882 }
 883
 884 /************************** RX-FUNCTIONS ****************************/
 885 /*
 886  * Rx theory of operation
 887  *
 888  * The host allocates 32 DMA target addresses and passes the host address
 889  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 890  * 0 to 31
 891  *
 892  * Rx Queue Indexes
 893  * The host/firmware share two index registers for managing the Rx buffers.
 894  *
 895  * The READ index maps to the first position that the firmware may be writing
 896  * to -- the driver can read up to (but not including) this position and get
 897  * good data.
 898  * The READ index is managed by the firmware once the card is enabled.
 899  *
 900  * The WRITE index maps to the last position the driver has read from -- the
 901  * position preceding WRITE is the last slot the firmware can place a packet.
 902  *
 903  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 904  * WRITE = READ.
 905  *
 906  * During initialization, the host sets up the READ queue position to the first
 907  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 908  *
 909  * When the firmware places a packet in a buffer, it will advance the READ index
 910  * and fire the RX interrupt.  The driver can then query the READ index and
 911  * process as many packets as possible, moving the WRITE index forward as it
 912  * resets the Rx queue buffers with new memory.
 913  *
 914  * The management in the driver is as follows:
 915  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 916  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 917  *   to replenish the iwl->rxq->rx_free.
 918  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 919  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 920  *   'processed' and 'read' driver indexes as well)
 921  * + A received packet is processed and handed to the kernel network stack,
 922  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 923  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 924  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 925  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 926  *   were enough free buffers and RX_STALLED is set it is cleared.
 927  *
 928  *
 929  * Driver sequence:
 930  *
 931  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 932  *                            iwl3945_rx_queue_restock
 933  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 934  *                            queue, updates firmware pointers, and updates
 935  *                            the WRITE index.  If insufficient rx_free buffers
 936  *                            are available, schedules iwl3945_rx_replenish
 937  *
 938  * -- enable interrupts --
 939  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 940  *                            READ INDEX, detaching the SKB from the pool.
 941  *                            Moves the packet buffer from queue to rx_used.
 942  *                            Calls iwl3945_rx_queue_restock to refill any empty
 943  *                            slots.
 944  * ...
 945  *
 946  */
 947
 948 /**
 949  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 950  */
 951 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 952                                           dma_addr_t dma_addr)
 953 {
 954         return cpu_to_le32((u32)dma_addr);
 955 }
 956
 957 /**
 958  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 959  *
 960  * If there are slots in the RX queue that need to be restocked,
 961  * and we have free pre-allocated buffers, fill the ranks as much
 962  * as we can, pulling from rx_free.
 963  *
 964  * This moves the 'write' index forward to catch up with 'processed', and
 965  * also updates the memory address in the firmware to reference the new
 966  * target buffer.
 967  */
 968 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
 969 {
 970         struct iwl_rx_queue *rxq = &priv->rxq;
 971         struct list_head *element;
 972         struct iwl_rx_mem_buffer *rxb;
 973         unsigned long flags;
 974         int write;
 975
 976         spin_lock_irqsave(&rxq->lock, flags);
 977         write = rxq->write & ~0x7;
 978         while ((iwl_legacy_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
 979                 /* Get next free Rx buffer, remove from free list */
 980                 element = rxq->rx_free.next;
 981                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
 982                 list_del(element);
 983
 984                 /* Point to Rx buffer via next RBD in circular buffer */
 985                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
 986                 rxq->queue[rxq->write] = rxb;
 987                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 988                 rxq->free_count--;
 989         }
 990         spin_unlock_irqrestore(&rxq->lock, flags);
 991         /* If the pre-allocated buffer pool is dropping low, schedule to
 992          * refill it */
 993         if (rxq->free_count <= RX_LOW_WATERMARK)
 994                 queue_work(priv->workqueue, &priv->rx_replenish);
 995
 996
 997         /* If we've added more space for the firmware to place data, tell it.
 998          * Increment device's write pointer in multiples of 8. */
 999         if ((rxq->write_actual != (rxq->write & ~0x7))
1000             || (abs(rxq->write - rxq->read) > 7)) {
1001                 spin_lock_irqsave(&rxq->lock, flags);
1002                 rxq->need_update = 1;
1003                 spin_unlock_irqrestore(&rxq->lock, flags);
1004                 iwl_legacy_rx_queue_update_write_ptr(priv, rxq);
1005         }
1006 }
1007
1008 /**
1009  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1010  *
1011  * When moving to rx_free an SKB is allocated for the slot.
1012  *
1013  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1014  * This is called as a scheduled work item (except for during initialization)
1015  */
1016 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1017 {
1018         struct iwl_rx_queue *rxq = &priv->rxq;
1019         struct list_head *element;
1020         struct iwl_rx_mem_buffer *rxb;
1021         struct page *page;
1022         unsigned long flags;
1023         gfp_t gfp_mask = priority;
1024
1025         while (1) {
1026                 spin_lock_irqsave(&rxq->lock, flags);
1027
1028                 if (list_empty(&rxq->rx_used)) {
1029                         spin_unlock_irqrestore(&rxq->lock, flags);
1030                         return;
1031                 }
1032                 spin_unlock_irqrestore(&rxq->lock, flags);
1033
1034                 if (rxq->free_count > RX_LOW_WATERMARK)
1035                         gfp_mask |= __GFP_NOWARN;
1036
1037                 if (priv->hw_params.rx_page_order > 0)
1038                         gfp_mask |= __GFP_COMP;
1039
1040                 /* Alloc a new receive buffer */
1041                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1042                 if (!page) {
1043                         if (net_ratelimit())
1044                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1045                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1046                             net_ratelimit())
1047                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1048                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1049                                          rxq->free_count);
1050                         /* We don't reschedule replenish work here -- we will
1051                          * call the restock method and if it still needs
1052                          * more buffers it will schedule replenish */
1053                         break;
1054                 }
1055
1056                 spin_lock_irqsave(&rxq->lock, flags);
1057                 if (list_empty(&rxq->rx_used)) {
1058                         spin_unlock_irqrestore(&rxq->lock, flags);
1059                         __free_pages(page, priv->hw_params.rx_page_order);
1060                         return;
1061                 }
1062                 element = rxq->rx_used.next;
1063                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1064                 list_del(element);
1065                 spin_unlock_irqrestore(&rxq->lock, flags);
1066
1067                 rxb->page = page;
1068                 /* Get physical address of RB/SKB */
1069                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1070                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1071                                 PCI_DMA_FROMDEVICE);
1072
1073                 spin_lock_irqsave(&rxq->lock, flags);
1074
1075                 list_add_tail(&rxb->list, &rxq->rx_free);
1076                 rxq->free_count++;
1077                 priv->alloc_rxb_page++;
1078
1079                 spin_unlock_irqrestore(&rxq->lock, flags);
1080         }
1081 }
1082
1083 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1084 {
1085         unsigned long flags;
1086         int i;
1087         spin_lock_irqsave(&rxq->lock, flags);
1088         INIT_LIST_HEAD(&rxq->rx_free);
1089         INIT_LIST_HEAD(&rxq->rx_used);
1090         /* Fill the rx_used queue with _all_ of the Rx buffers */
1091         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1092                 /* In the reset function, these buffers may have been allocated
1093                  * to an SKB, so we need to unmap and free potential storage */
1094                 if (rxq->pool[i].page != NULL) {
1095                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1096                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1097                                 PCI_DMA_FROMDEVICE);
1098                         __iwl_legacy_free_pages(priv, rxq->pool[i].page);
1099                         rxq->pool[i].page = NULL;
1100                 }
1101                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1102         }
1103
1104         /* Set us so that we have processed and used all buffers, but have
1105          * not restocked the Rx queue with fresh buffers */
1106         rxq->read = rxq->write = 0;
1107         rxq->write_actual = 0;
1108         rxq->free_count = 0;
1109         spin_unlock_irqrestore(&rxq->lock, flags);
1110 }
1111
1112 void iwl3945_rx_replenish(void *data)
1113 {
1114         struct iwl_priv *priv = data;
1115         unsigned long flags;
1116
1117         iwl3945_rx_allocate(priv, GFP_KERNEL);
1118
1119         spin_lock_irqsave(&priv->lock, flags);
1120         iwl3945_rx_queue_restock(priv);
1121         spin_unlock_irqrestore(&priv->lock, flags);
1122 }
1123
1124 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1125 {
1126         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1127
1128         iwl3945_rx_queue_restock(priv);
1129 }
1130
1131
1132 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1133  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1134  * This free routine walks the list of POOL entries and if SKB is set to
1135  * non NULL it is unmapped and freed
1136  */
1137 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1138 {
1139         int i;
1140         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1141                 if (rxq->pool[i].page != NULL) {
1142                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1143                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1144                                 PCI_DMA_FROMDEVICE);
1145                         __iwl_legacy_free_pages(priv, rxq->pool[i].page);
1146                         rxq->pool[i].page = NULL;
1147                 }
1148         }
1149
1150         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1151                           rxq->bd_dma);
1152         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1153                           rxq->rb_stts, rxq->rb_stts_dma);
1154         rxq->bd = NULL;
1155         rxq->rb_stts  = NULL;
1156 }
1157
1158
1159 /* Convert linear signal-to-noise ratio into dB */
1160 static u8 ratio2dB[100] = {
1161 /*       0   1   2   3   4   5   6   7   8   9 */
1162          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1163         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1164         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1165         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1166         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1167         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1168         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1169         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1170         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1171         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1172 };
1173
1174 /* Calculates a relative dB value from a ratio of linear
1175  *   (i.e. not dB) signal levels.
1176  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1177 int iwl3945_calc_db_from_ratio(int sig_ratio)
1178 {
1179         /* 1000:1 or higher just report as 60 dB */
1180         if (sig_ratio >= 1000)
1181                 return 60;
1182
1183         /* 100:1 or higher, divide by 10 and use table,
1184          *   add 20 dB to make up for divide by 10 */
1185         if (sig_ratio >= 100)
1186                 return 20 + (int)ratio2dB[sig_ratio/10];
1187
1188         /* We shouldn't see this */
1189         if (sig_ratio < 1)
1190                 return 0;
1191
1192         /* Use table for ratios 1:1 - 99:1 */
1193         return (int)ratio2dB[sig_ratio];
1194 }
1195
1196 /**
1197  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1198  *
1199  * Uses the priv->rx_handlers callback function array to invoke
1200  * the appropriate handlers, including command responses,
1201  * frame-received notifications, and other notifications.
1202  */
1203 static void iwl3945_rx_handle(struct iwl_priv *priv)
1204 {
1205         struct iwl_rx_mem_buffer *rxb;
1206         struct iwl_rx_packet *pkt;
1207         struct iwl_rx_queue *rxq = &priv->rxq;
1208         u32 r, i;
1209         int reclaim;
1210         unsigned long flags;
1211         u8 fill_rx = 0;
1212         u32 count = 8;
1213         int total_empty = 0;
1214
1215         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1216          * buffer that the driver may process (last buffer filled by ucode). */
1217         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1218         i = rxq->read;
1219
1220         /* calculate total frames need to be restock after handling RX */
1221         total_empty = r - rxq->write_actual;
1222         if (total_empty < 0)
1223                 total_empty += RX_QUEUE_SIZE;
1224
1225         if (total_empty > (RX_QUEUE_SIZE / 2))
1226                 fill_rx = 1;
1227         /* Rx interrupt, but nothing sent from uCode */
1228         if (i == r)
1229                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1230
1231         while (i != r) {
1232                 int len;
1233
1234                 rxb = rxq->queue[i];
1235
1236                 /* If an RXB doesn't have a Rx queue slot associated with it,
1237                  * then a bug has been introduced in the queue refilling
1238                  * routines -- catch it here */
1239                 BUG_ON(rxb == NULL);
1240
1241                 rxq->queue[i] = NULL;
1242
1243                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1244                                PAGE_SIZE << priv->hw_params.rx_page_order,
1245                                PCI_DMA_FROMDEVICE);
1246                 pkt = rxb_addr(rxb);
1247
1248                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1249                 len += sizeof(u32); /* account for status word */
1250                 trace_iwlwifi_legacy_dev_rx(priv, pkt, len);
1251
1252                 /* Reclaim a command buffer only if this packet is a response
1253                  *   to a (driver-originated) command.
1254                  * If the packet (e.g. Rx frame) originated from uCode,
1255                  *   there is no command buffer to reclaim.
1256                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1257                  *   but apparently a few don't get set; catch them here. */
1258                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1259                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1260                         (pkt->hdr.cmd != REPLY_TX);
1261
1262                 /* Based on type of command response or notification,
1263                  *   handle those that need handling via function in
1264                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1265                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1266                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1267                         iwl_legacy_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1268                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1269                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1270                 } else {
1271                         /* No handling needed */
1272                         IWL_DEBUG_RX(priv,
1273                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1274                                 r, i, iwl_legacy_get_cmd_string(pkt->hdr.cmd),
1275                                 pkt->hdr.cmd);
1276                 }
1277
1278                 /*
1279                  * XXX: After here, we should always check rxb->page
1280                  * against NULL before touching it or its virtual
1281                  * memory (pkt). Because some rx_handler might have
1282                  * already taken or freed the pages.
1283                  */
1284
1285                 if (reclaim) {
1286                         /* Invoke any callbacks, transfer the buffer to caller,
1287                          * and fire off the (possibly) blocking iwl_legacy_send_cmd()
1288                          * as we reclaim the driver command queue */
1289                         if (rxb->page)
1290                                 iwl_legacy_tx_cmd_complete(priv, rxb);
1291                         else
1292                                 IWL_WARN(priv, "Claim null rxb?\n");
1293                 }
1294
1295                 /* Reuse the page if possible. For notification packets and
1296                  * SKBs that fail to Rx correctly, add them back into the
1297                  * rx_free list for reuse later. */
1298                 spin_lock_irqsave(&rxq->lock, flags);
1299                 if (rxb->page != NULL) {
1300                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1301                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1302                                 PCI_DMA_FROMDEVICE);
1303                         list_add_tail(&rxb->list, &rxq->rx_free);
1304                         rxq->free_count++;
1305                 } else
1306                         list_add_tail(&rxb->list, &rxq->rx_used);
1307
1308                 spin_unlock_irqrestore(&rxq->lock, flags);
1309
1310                 i = (i + 1) & RX_QUEUE_MASK;
1311                 /* If there are a lot of unused frames,
1312                  * restock the Rx queue so ucode won't assert. */
1313                 if (fill_rx) {
1314                         count++;
1315                         if (count >= 8) {
1316                                 rxq->read = i;
1317                                 iwl3945_rx_replenish_now(priv);
1318                                 count = 0;
1319                         }
1320                 }
1321         }
1322
1323         /* Backtrack one entry */
1324         rxq->read = i;
1325         if (fill_rx)
1326                 iwl3945_rx_replenish_now(priv);
1327         else
1328                 iwl3945_rx_queue_restock(priv);
1329 }
1330
1331 /* call this function to flush any scheduled tasklet */
1332 static inline void iwl3945_synchronize_irq(struct iwl_priv *priv)
1333 {
1334         /* wait to make sure we flush pending tasklet*/
1335         synchronize_irq(priv->pci_dev->irq);
1336         tasklet_kill(&priv->irq_tasklet);
1337 }
1338
1339 static const char *iwl3945_desc_lookup(int i)
1340 {
1341         switch (i) {
1342         case 1:
1343                 return "FAIL";
1344         case 2:
1345                 return "BAD_PARAM";
1346         case 3:
1347                 return "BAD_CHECKSUM";
1348         case 4:
1349                 return "NMI_INTERRUPT";
1350         case 5:
1351                 return "SYSASSERT";
1352         case 6:
1353                 return "FATAL_ERROR";
1354         }
1355
1356         return "UNKNOWN";
1357 }
1358
1359 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1360 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1361
1362 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1363 {
1364         u32 i;
1365         u32 desc, time, count, base, data1;
1366         u32 blink1, blink2, ilink1, ilink2;
1367
1368         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1369
1370         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1371                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1372                 return;
1373         }
1374
1375
1376         count = iwl_legacy_read_targ_mem(priv, base);
1377
1378         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1379                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1380                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1381                         priv->status, count);
1382         }
1383
1384         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1385                   "ilink1  nmiPC   Line\n");
1386         for (i = ERROR_START_OFFSET;
1387              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1388              i += ERROR_ELEM_SIZE) {
1389                 desc = iwl_legacy_read_targ_mem(priv, base + i);
1390                 time =
1391                     iwl_legacy_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1392                 blink1 =
1393                     iwl_legacy_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1394                 blink2 =
1395                     iwl_legacy_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1396                 ilink1 =
1397                     iwl_legacy_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1398                 ilink2 =
1399                     iwl_legacy_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1400                 data1 =
1401                     iwl_legacy_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1402
1403                 IWL_ERR(priv,
1404                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1405                         iwl3945_desc_lookup(desc), desc, time, blink1, blink2,
1406                         ilink1, ilink2, data1);
1407                 trace_iwlwifi_legacy_dev_ucode_error(priv, desc, time, data1, 0,
1408                                         0, blink1, blink2, ilink1, ilink2);
1409         }
1410 }
1411
1412 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1413 {
1414         u32 inta, handled = 0;
1415         u32 inta_fh;
1416         unsigned long flags;
1417 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1418         u32 inta_mask;
1419 #endif
1420
1421         spin_lock_irqsave(&priv->lock, flags);
1422
1423         /* Ack/clear/reset pending uCode interrupts.
1424          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1425          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1426         inta = iwl_read32(priv, CSR_INT);
1427         iwl_write32(priv, CSR_INT, inta);
1428
1429         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1430          * Any new interrupts that happen after this, either while we're
1431          * in this tasklet, or later, will show up in next ISR/tasklet. */
1432         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1433         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1434
1435 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1436         if (iwl_legacy_get_debug_level(priv) & IWL_DL_ISR) {
1437                 /* just for debug */
1438                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1439                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1440                               inta, inta_mask, inta_fh);
1441         }
1442 #endif
1443
1444         spin_unlock_irqrestore(&priv->lock, flags);
1445
1446         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1447          * atomic, make sure that inta covers all the interrupts that
1448          * we've discovered, even if FH interrupt came in just after
1449          * reading CSR_INT. */
1450         if (inta_fh & CSR39_FH_INT_RX_MASK)
1451                 inta |= CSR_INT_BIT_FH_RX;
1452         if (inta_fh & CSR39_FH_INT_TX_MASK)
1453                 inta |= CSR_INT_BIT_FH_TX;
1454
1455         /* Now service all interrupt bits discovered above. */
1456         if (inta & CSR_INT_BIT_HW_ERR) {
1457                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1458
1459                 /* Tell the device to stop sending interrupts */
1460                 iwl_legacy_disable_interrupts(priv);
1461
1462                 priv->isr_stats.hw++;
1463                 iwl_legacy_irq_handle_error(priv);
1464
1465                 handled |= CSR_INT_BIT_HW_ERR;
1466
1467                 return;
1468         }
1469
1470 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1471         if (iwl_legacy_get_debug_level(priv) & (IWL_DL_ISR)) {
1472                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1473                 if (inta & CSR_INT_BIT_SCD) {
1474                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1475                                       "the frame/frames.\n");
1476                         priv->isr_stats.sch++;
1477                 }
1478
1479                 /* Alive notification via Rx interrupt will do the real work */
1480                 if (inta & CSR_INT_BIT_ALIVE) {
1481                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1482                         priv->isr_stats.alive++;
1483                 }
1484         }
1485 #endif
1486         /* Safely ignore these bits for debug checks below */
1487         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1488
1489         /* Error detected by uCode */
1490         if (inta & CSR_INT_BIT_SW_ERR) {
1491                 IWL_ERR(priv, "Microcode SW error detected. "
1492                         "Restarting 0x%X.\n", inta);
1493                 priv->isr_stats.sw++;
1494                 iwl_legacy_irq_handle_error(priv);
1495                 handled |= CSR_INT_BIT_SW_ERR;
1496         }
1497
1498         /* uCode wakes up after power-down sleep */
1499         if (inta & CSR_INT_BIT_WAKEUP) {
1500                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1501                 iwl_legacy_rx_queue_update_write_ptr(priv, &priv->rxq);
1502                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[0]);
1503                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[1]);
1504                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[2]);
1505                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[3]);
1506                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[4]);
1507                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[5]);
1508
1509                 priv->isr_stats.wakeup++;
1510                 handled |= CSR_INT_BIT_WAKEUP;
1511         }
1512
1513         /* All uCode command responses, including Tx command responses,
1514          * Rx "responses" (frame-received notification), and other
1515          * notifications from uCode come through here*/
1516         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1517                 iwl3945_rx_handle(priv);
1518                 priv->isr_stats.rx++;
1519                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1520         }
1521
1522         if (inta & CSR_INT_BIT_FH_TX) {
1523                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1524                 priv->isr_stats.tx++;
1525
1526                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1527                 iwl_legacy_write_direct32(priv, FH39_TCSR_CREDIT
1528                                         (FH39_SRVC_CHNL), 0x0);
1529                 handled |= CSR_INT_BIT_FH_TX;
1530         }
1531
1532         if (inta & ~handled) {
1533                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1534                 priv->isr_stats.unhandled++;
1535         }
1536
1537         if (inta & ~priv->inta_mask) {
1538                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1539                          inta & ~priv->inta_mask);
1540                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1541         }
1542
1543         /* Re-enable all interrupts */
1544         /* only Re-enable if disabled by irq */
1545         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1546                 iwl_legacy_enable_interrupts(priv);
1547
1548 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1549         if (iwl_legacy_get_debug_level(priv) & (IWL_DL_ISR)) {
1550                 inta = iwl_read32(priv, CSR_INT);
1551                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1552                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1553                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1554                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1555         }
1556 #endif
1557 }
1558
1559 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1560                                          enum ieee80211_band band,
1561                                      u8 is_active, u8 n_probes,
1562                                      struct iwl3945_scan_channel *scan_ch,
1563                                      struct ieee80211_vif *vif)
1564 {
1565         struct ieee80211_channel *chan;
1566         const struct ieee80211_supported_band *sband;
1567         const struct iwl_channel_info *ch_info;
1568         u16 passive_dwell = 0;
1569         u16 active_dwell = 0;
1570         int added, i;
1571
1572         sband = iwl_get_hw_mode(priv, band);
1573         if (!sband)
1574                 return 0;
1575
1576         active_dwell = iwl_legacy_get_active_dwell_time(priv, band, n_probes);
1577         passive_dwell = iwl_legacy_get_passive_dwell_time(priv, band, vif);
1578
1579         if (passive_dwell <= active_dwell)
1580                 passive_dwell = active_dwell + 1;
1581
1582         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1583                 chan = priv->scan_request->channels[i];
1584
1585                 if (chan->band != band)
1586                         continue;
1587
1588                 scan_ch->channel = chan->hw_value;
1589
1590                 ch_info = iwl_legacy_get_channel_info(priv, band,
1591                                                         scan_ch->channel);
1592                 if (!iwl_legacy_is_channel_valid(ch_info)) {
1593                         IWL_DEBUG_SCAN(priv,
1594                                 "Channel %d is INVALID for this band.\n",
1595                                scan_ch->channel);
1596                         continue;
1597                 }
1598
1599                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1600                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1601                 /* If passive , set up for auto-switch
1602                  *  and use long active_dwell time.
1603                  */
1604                 if (!is_active || iwl_legacy_is_channel_passive(ch_info) ||
1605                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1606                         scan_ch->type = 0;      /* passive */
1607                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1608                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1609                 } else {
1610                         scan_ch->type = 1;      /* active */
1611                 }
1612
1613                 /* Set direct probe bits. These may be used both for active
1614                  * scan channels (probes gets sent right away),
1615                  * or for passive channels (probes get se sent only after
1616                  * hearing clear Rx packet).*/
1617                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1618                         if (n_probes)
1619                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1620                 } else {
1621                         /* uCode v1 does not allow setting direct probe bits on
1622                          * passive channel. */
1623                         if ((scan_ch->type & 1) && n_probes)
1624                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1625                 }
1626
1627                 /* Set txpower levels to defaults */
1628                 scan_ch->tpc.dsp_atten = 110;
1629                 /* scan_pwr_info->tpc.dsp_atten; */
1630
1631                 /*scan_pwr_info->tpc.tx_gain; */
1632                 if (band == IEEE80211_BAND_5GHZ)
1633                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1634                 else {
1635                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1636                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1637                          * power level:
1638                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1639                          */
1640                 }
1641
1642                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1643                                scan_ch->channel,
1644                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1645                                (scan_ch->type & 1) ?
1646                                active_dwell : passive_dwell);
1647
1648                 scan_ch++;
1649                 added++;
1650         }
1651
1652         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1653         return added;
1654 }
1655
1656 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1657                               struct ieee80211_rate *rates)
1658 {
1659         int i;
1660
1661         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1662                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1663                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1664                 rates[i].hw_value_short = i;
1665                 rates[i].flags = 0;
1666                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1667                         /*
1668                          * If CCK != 1M then set short preamble rate flag.
1669                          */
1670                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1671                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1672                 }
1673         }
1674 }
1675
1676 /******************************************************************************
1677  *
1678  * uCode download functions
1679  *
1680  ******************************************************************************/
1681
1682 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1683 {
1684         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1685         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1686         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1687         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1688         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1689         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1690 }
1691
1692 /**
1693  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1694  *     looking at all data.
1695  */
1696 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1697 {
1698         u32 val;
1699         u32 save_len = len;
1700         int rc = 0;
1701         u32 errcnt;
1702
1703         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1704
1705         iwl_legacy_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1706                                IWL39_RTC_INST_LOWER_BOUND);
1707
1708         errcnt = 0;
1709         for (; len > 0; len -= sizeof(u32), image++) {
1710                 /* read data comes through single port, auto-incr addr */
1711                 /* NOTE: Use the debugless read so we don't flood kernel log
1712                  * if IWL_DL_IO is set */
1713                 val = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1714                 if (val != le32_to_cpu(*image)) {
1715                         IWL_ERR(priv, "uCode INST section is invalid at "
1716                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1717                                   save_len - len, val, le32_to_cpu(*image));
1718                         rc = -EIO;
1719                         errcnt++;
1720                         if (errcnt >= 20)
1721                                 break;
1722                 }
1723         }
1724
1725
1726         if (!errcnt)
1727                 IWL_DEBUG_INFO(priv,
1728                         "ucode image in INSTRUCTION memory is good\n");
1729
1730         return rc;
1731 }
1732
1733
1734 /**
1735  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1736  *   using sample data 100 bytes apart.  If these sample points are good,
1737  *   it's a pretty good bet that everything between them is good, too.
1738  */
1739 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1740 {
1741         u32 val;
1742         int rc = 0;
1743         u32 errcnt = 0;
1744         u32 i;
1745
1746         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1747
1748         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1749                 /* read data comes through single port, auto-incr addr */
1750                 /* NOTE: Use the debugless read so we don't flood kernel log
1751                  * if IWL_DL_IO is set */
1752                 iwl_legacy_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1753                         i + IWL39_RTC_INST_LOWER_BOUND);
1754                 val = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1755                 if (val != le32_to_cpu(*image)) {
1756 #if 0 /* Enable this if you want to see details */
1757                         IWL_ERR(priv, "uCode INST section is invalid at "
1758                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1759                                   i, val, *image);
1760 #endif
1761                         rc = -EIO;
1762                         errcnt++;
1763                         if (errcnt >= 3)
1764                                 break;
1765                 }
1766         }
1767
1768         return rc;
1769 }
1770
1771
1772 /**
1773  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1774  *    and verify its contents
1775  */
1776 static int iwl3945_verify_ucode(struct iwl_priv *priv)
1777 {
1778         __le32 *image;
1779         u32 len;
1780         int rc = 0;
1781
1782         /* Try bootstrap */
1783         image = (__le32 *)priv->ucode_boot.v_addr;
1784         len = priv->ucode_boot.len;
1785         rc = iwl3945_verify_inst_sparse(priv, image, len);
1786         if (rc == 0) {
1787                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1788                 return 0;
1789         }
1790
1791         /* Try initialize */
1792         image = (__le32 *)priv->ucode_init.v_addr;
1793         len = priv->ucode_init.len;
1794         rc = iwl3945_verify_inst_sparse(priv, image, len);
1795         if (rc == 0) {
1796                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1797                 return 0;
1798         }
1799
1800         /* Try runtime/protocol */
1801         image = (__le32 *)priv->ucode_code.v_addr;
1802         len = priv->ucode_code.len;
1803         rc = iwl3945_verify_inst_sparse(priv, image, len);
1804         if (rc == 0) {
1805                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1806                 return 0;
1807         }
1808
1809         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1810
1811         /* Since nothing seems to match, show first several data entries in
1812          * instruction SRAM, so maybe visual inspection will give a clue.
1813          * Selection of bootstrap image (vs. other images) is arbitrary. */
1814         image = (__le32 *)priv->ucode_boot.v_addr;
1815         len = priv->ucode_boot.len;
1816         rc = iwl3945_verify_inst_full(priv, image, len);
1817
1818         return rc;
1819 }
1820
1821 static void iwl3945_nic_start(struct iwl_priv *priv)
1822 {
1823         /* Remove all resets to allow NIC to operate */
1824         iwl_write32(priv, CSR_RESET, 0);
1825 }
1826
1827 #define IWL3945_UCODE_GET(item)                                         \
1828 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
1829 {                                                                       \
1830         return le32_to_cpu(ucode->v1.item);                             \
1831 }
1832
1833 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
1834 {
1835         return 24;
1836 }
1837
1838 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
1839 {
1840         return (u8 *) ucode->v1.data;
1841 }
1842
1843 IWL3945_UCODE_GET(inst_size);
1844 IWL3945_UCODE_GET(data_size);
1845 IWL3945_UCODE_GET(init_size);
1846 IWL3945_UCODE_GET(init_data_size);
1847 IWL3945_UCODE_GET(boot_size);
1848
1849 /**
1850  * iwl3945_read_ucode - Read uCode images from disk file.
1851  *
1852  * Copy into buffers for card to fetch via bus-mastering
1853  */
1854 static int iwl3945_read_ucode(struct iwl_priv *priv)
1855 {
1856         const struct iwl_ucode_header *ucode;
1857         int ret = -EINVAL, index;
1858         const struct firmware *ucode_raw;
1859         /* firmware file name contains uCode/driver compatibility version */
1860         const char *name_pre = priv->cfg->fw_name_pre;
1861         const unsigned int api_max = priv->cfg->ucode_api_max;
1862         const unsigned int api_min = priv->cfg->ucode_api_min;
1863         char buf[25];
1864         u8 *src;
1865         size_t len;
1866         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1867
1868         /* Ask kernel firmware_class module to get the boot firmware off disk.
1869          * request_firmware() is synchronous, file is in memory on return. */
1870         for (index = api_max; index >= api_min; index--) {
1871                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
1872                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1873                 if (ret < 0) {
1874                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1875                                   buf, ret);
1876                         if (ret == -ENOENT)
1877                                 continue;
1878                         else
1879                                 goto error;
1880                 } else {
1881                         if (index < api_max)
1882                                 IWL_ERR(priv, "Loaded firmware %s, "
1883                                         "which is deprecated. "
1884                                         " Please use API v%u instead.\n",
1885                                           buf, api_max);
1886                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
1887                                        "(%zd bytes) from disk\n",
1888                                        buf, ucode_raw->size);
1889                         break;
1890                 }
1891         }
1892
1893         if (ret < 0)
1894                 goto error;
1895
1896         /* Make sure that we got at least our header! */
1897         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
1898                 IWL_ERR(priv, "File size way too small!\n");
1899                 ret = -EINVAL;
1900                 goto err_release;
1901         }
1902
1903         /* Data from ucode file:  header followed by uCode images */
1904         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1905
1906         priv->ucode_ver = le32_to_cpu(ucode->ver);
1907         api_ver = IWL_UCODE_API(priv->ucode_ver);
1908         inst_size = iwl3945_ucode_get_inst_size(ucode);
1909         data_size = iwl3945_ucode_get_data_size(ucode);
1910         init_size = iwl3945_ucode_get_init_size(ucode);
1911         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
1912         boot_size = iwl3945_ucode_get_boot_size(ucode);
1913         src = iwl3945_ucode_get_data(ucode);
1914
1915         /* api_ver should match the api version forming part of the
1916          * firmware filename ... but we don't check for that and only rely
1917          * on the API version read from firmware header from here on forward */
1918
1919         if (api_ver < api_min || api_ver > api_max) {
1920                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1921                           "Driver supports v%u, firmware is v%u.\n",
1922                           api_max, api_ver);
1923                 priv->ucode_ver = 0;
1924                 ret = -EINVAL;
1925                 goto err_release;
1926         }
1927         if (api_ver != api_max)
1928                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
1929                           "got %u. New firmware can be obtained "
1930                           "from http://www.intellinuxwireless.org.\n",
1931                           api_max, api_ver);
1932
1933         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1934                 IWL_UCODE_MAJOR(priv->ucode_ver),
1935                 IWL_UCODE_MINOR(priv->ucode_ver),
1936                 IWL_UCODE_API(priv->ucode_ver),
1937                 IWL_UCODE_SERIAL(priv->ucode_ver));
1938
1939         snprintf(priv->hw->wiphy->fw_version,
1940                  sizeof(priv->hw->wiphy->fw_version),
1941                  "%u.%u.%u.%u",
1942                  IWL_UCODE_MAJOR(priv->ucode_ver),
1943                  IWL_UCODE_MINOR(priv->ucode_ver),
1944                  IWL_UCODE_API(priv->ucode_ver),
1945                  IWL_UCODE_SERIAL(priv->ucode_ver));
1946
1947         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1948                        priv->ucode_ver);
1949         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1950                        inst_size);
1951         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1952                        data_size);
1953         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1954                        init_size);
1955         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1956                        init_data_size);
1957         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1958                        boot_size);
1959
1960
1961         /* Verify size of file vs. image size info in file's header */
1962         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
1963                 inst_size + data_size + init_size +
1964                 init_data_size + boot_size) {
1965
1966                 IWL_DEBUG_INFO(priv,
1967                         "uCode file size %zd does not match expected size\n",
1968                         ucode_raw->size);
1969                 ret = -EINVAL;
1970                 goto err_release;
1971         }
1972
1973         /* Verify that uCode images will fit in card's SRAM */
1974         if (inst_size > IWL39_MAX_INST_SIZE) {
1975                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1976                                inst_size);
1977                 ret = -EINVAL;
1978                 goto err_release;
1979         }
1980
1981         if (data_size > IWL39_MAX_DATA_SIZE) {
1982                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1983                                data_size);
1984                 ret = -EINVAL;
1985                 goto err_release;
1986         }
1987         if (init_size > IWL39_MAX_INST_SIZE) {
1988                 IWL_DEBUG_INFO(priv,
1989                                 "uCode init instr len %d too large to fit in\n",
1990                                 init_size);
1991                 ret = -EINVAL;
1992                 goto err_release;
1993         }
1994         if (init_data_size > IWL39_MAX_DATA_SIZE) {
1995                 IWL_DEBUG_INFO(priv,
1996                                 "uCode init data len %d too large to fit in\n",
1997                                 init_data_size);
1998                 ret = -EINVAL;
1999                 goto err_release;
2000         }
2001         if (boot_size > IWL39_MAX_BSM_SIZE) {
2002                 IWL_DEBUG_INFO(priv,
2003                                 "uCode boot instr len %d too large to fit in\n",
2004                                 boot_size);
2005                 ret = -EINVAL;
2006                 goto err_release;
2007         }
2008
2009         /* Allocate ucode buffers for card's bus-master loading ... */
2010
2011         /* Runtime instructions and 2 copies of data:
2012          * 1) unmodified from disk
2013          * 2) backup cache for save/restore during power-downs */
2014         priv->ucode_code.len = inst_size;
2015         iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2016
2017         priv->ucode_data.len = data_size;
2018         iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2019
2020         priv->ucode_data_backup.len = data_size;
2021         iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2022
2023         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2024             !priv->ucode_data_backup.v_addr)
2025                 goto err_pci_alloc;
2026
2027         /* Initialization instructions and data */
2028         if (init_size && init_data_size) {
2029                 priv->ucode_init.len = init_size;
2030                 iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2031
2032                 priv->ucode_init_data.len = init_data_size;
2033                 iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2034
2035                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2036                         goto err_pci_alloc;
2037         }
2038
2039         /* Bootstrap (instructions only, no data) */
2040         if (boot_size) {
2041                 priv->ucode_boot.len = boot_size;
2042                 iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2043
2044                 if (!priv->ucode_boot.v_addr)
2045                         goto err_pci_alloc;
2046         }
2047
2048         /* Copy images into buffers for card's bus-master reads ... */
2049
2050         /* Runtime instructions (first block of data in file) */
2051         len = inst_size;
2052         IWL_DEBUG_INFO(priv,
2053                 "Copying (but not loading) uCode instr len %zd\n", len);
2054         memcpy(priv->ucode_code.v_addr, src, len);
2055         src += len;
2056
2057         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2058                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2059
2060         /* Runtime data (2nd block)
2061          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2062         len = data_size;
2063         IWL_DEBUG_INFO(priv,
2064                 "Copying (but not loading) uCode data len %zd\n", len);
2065         memcpy(priv->ucode_data.v_addr, src, len);
2066         memcpy(priv->ucode_data_backup.v_addr, src, len);
2067         src += len;
2068
2069         /* Initialization instructions (3rd block) */
2070         if (init_size) {
2071                 len = init_size;
2072                 IWL_DEBUG_INFO(priv,
2073                         "Copying (but not loading) init instr len %zd\n", len);
2074                 memcpy(priv->ucode_init.v_addr, src, len);
2075                 src += len;
2076         }
2077
2078         /* Initialization data (4th block) */
2079         if (init_data_size) {
2080                 len = init_data_size;
2081                 IWL_DEBUG_INFO(priv,
2082                         "Copying (but not loading) init data len %zd\n", len);
2083                 memcpy(priv->ucode_init_data.v_addr, src, len);
2084                 src += len;
2085         }
2086
2087         /* Bootstrap instructions (5th block) */
2088         len = boot_size;
2089         IWL_DEBUG_INFO(priv,
2090                 "Copying (but not loading) boot instr len %zd\n", len);
2091         memcpy(priv->ucode_boot.v_addr, src, len);
2092
2093         /* We have our copies now, allow OS release its copies */
2094         release_firmware(ucode_raw);
2095         return 0;
2096
2097  err_pci_alloc:
2098         IWL_ERR(priv, "failed to allocate pci memory\n");
2099         ret = -ENOMEM;
2100         iwl3945_dealloc_ucode_pci(priv);
2101
2102  err_release:
2103         release_firmware(ucode_raw);
2104
2105  error:
2106         return ret;
2107 }
2108
2109
2110 /**
2111  * iwl3945_set_ucode_ptrs - Set uCode address location
2112  *
2113  * Tell initialization uCode where to find runtime uCode.
2114  *
2115  * BSM registers initially contain pointers to initialization uCode.
2116  * We need to replace them to load runtime uCode inst and data,
2117  * and to save runtime data when powering down.
2118  */
2119 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2120 {
2121         dma_addr_t pinst;
2122         dma_addr_t pdata;
2123
2124         /* bits 31:0 for 3945 */
2125         pinst = priv->ucode_code.p_addr;
2126         pdata = priv->ucode_data_backup.p_addr;
2127
2128         /* Tell bootstrap uCode where to find image to load */
2129         iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2130         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2131         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2132                                  priv->ucode_data.len);
2133
2134         /* Inst byte count must be last to set up, bit 31 signals uCode
2135          *   that all new ptr/size info is in place */
2136         iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2137                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2138
2139         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2140
2141         return 0;
2142 }
2143
2144 /**
2145  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2146  *
2147  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2148  *
2149  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2150  */
2151 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2152 {
2153         /* Check alive response for "valid" sign from uCode */
2154         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2155                 /* We had an error bringing up the hardware, so take it
2156                  * all the way back down so we can try again */
2157                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2158                 goto restart;
2159         }
2160
2161         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2162          * This is a paranoid check, because we would not have gotten the
2163          * "initialize" alive if code weren't properly loaded.  */
2164         if (iwl3945_verify_ucode(priv)) {
2165                 /* Runtime instruction load was bad;
2166                  * take it all the way back down so we can try again */
2167                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2168                 goto restart;
2169         }
2170
2171         /* Send pointers to protocol/runtime uCode image ... init code will
2172          * load and launch runtime uCode, which will send us another "Alive"
2173          * notification. */
2174         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2175         if (iwl3945_set_ucode_ptrs(priv)) {
2176                 /* Runtime instruction load won't happen;
2177                  * take it all the way back down so we can try again */
2178                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2179                 goto restart;
2180         }
2181         return;
2182
2183  restart:
2184         queue_work(priv->workqueue, &priv->restart);
2185 }
2186
2187 /**
2188  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2189  *                   from protocol/runtime uCode (initialization uCode's
2190  *                   Alive gets handled by iwl3945_init_alive_start()).
2191  */
2192 static void iwl3945_alive_start(struct iwl_priv *priv)
2193 {
2194         int thermal_spin = 0;
2195         u32 rfkill;
2196         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2197
2198         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2199
2200         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2201                 /* We had an error bringing up the hardware, so take it
2202                  * all the way back down so we can try again */
2203                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2204                 goto restart;
2205         }
2206
2207         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2208          * This is a paranoid check, because we would not have gotten the
2209          * "runtime" alive if code weren't properly loaded.  */
2210         if (iwl3945_verify_ucode(priv)) {
2211                 /* Runtime instruction load was bad;
2212                  * take it all the way back down so we can try again */
2213                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2214                 goto restart;
2215         }
2216
2217         rfkill = iwl_legacy_read_prph(priv, APMG_RFKILL_REG);
2218         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2219
2220         if (rfkill & 0x1) {
2221                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2222                 /* if RFKILL is not on, then wait for thermal
2223                  * sensor in adapter to kick in */
2224                 while (iwl3945_hw_get_temperature(priv) == 0) {
2225                         thermal_spin++;
2226                         udelay(10);
2227                 }
2228
2229                 if (thermal_spin)
2230                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2231                                        thermal_spin * 10);
2232         } else
2233                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2234
2235         /* After the ALIVE response, we can send commands to 3945 uCode */
2236         set_bit(STATUS_ALIVE, &priv->status);
2237
2238         /* Enable watchdog to monitor the driver tx queues */
2239         iwl_legacy_setup_watchdog(priv);
2240
2241         if (iwl_legacy_is_rfkill(priv))
2242                 return;
2243
2244         ieee80211_wake_queues(priv->hw);
2245
2246         priv->active_rate = IWL_RATES_MASK_3945;
2247
2248         iwl_legacy_power_update_mode(priv, true);
2249
2250         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS)) {
2251                 struct iwl3945_rxon_cmd *active_rxon =
2252                                 (struct iwl3945_rxon_cmd *)(&ctx->active);
2253
2254                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2255                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2256         } else {
2257                 /* Initialize our rx_config data */
2258                 iwl_legacy_connection_init_rx_config(priv, ctx);
2259         }
2260
2261         /* Configure Bluetooth device coexistence support */
2262         iwl_legacy_send_bt_config(priv);
2263
2264         set_bit(STATUS_READY, &priv->status);
2265
2266         /* Configure the adapter for unassociated operation */
2267         iwl3945_commit_rxon(priv, ctx);
2268
2269         iwl3945_reg_txpower_periodic(priv);
2270
2271         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2272         wake_up(&priv->wait_command_queue);
2273
2274         return;
2275
2276  restart:
2277         queue_work(priv->workqueue, &priv->restart);
2278 }
2279
2280 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2281
2282 static void __iwl3945_down(struct iwl_priv *priv)
2283 {
2284         unsigned long flags;
2285         int exit_pending;
2286
2287         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2288
2289         iwl_legacy_scan_cancel_timeout(priv, 200);
2290
2291         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2292
2293         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2294          * to prevent rearm timer */
2295         del_timer_sync(&priv->watchdog);
2296
2297         /* Station information will now be cleared in device */
2298         iwl_legacy_clear_ucode_stations(priv, NULL);
2299         iwl_legacy_dealloc_bcast_stations(priv);
2300         iwl_legacy_clear_driver_stations(priv);
2301
2302         /* Unblock any waiting calls */
2303         wake_up_all(&priv->wait_command_queue);
2304
2305         /* Wipe out the EXIT_PENDING status bit if we are not actually
2306          * exiting the module */
2307         if (!exit_pending)
2308                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2309
2310         /* stop and reset the on-board processor */
2311         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2312
2313         /* tell the device to stop sending interrupts */
2314         spin_lock_irqsave(&priv->lock, flags);
2315         iwl_legacy_disable_interrupts(priv);
2316         spin_unlock_irqrestore(&priv->lock, flags);
2317         iwl3945_synchronize_irq(priv);
2318
2319         if (priv->mac80211_registered)
2320                 ieee80211_stop_queues(priv->hw);
2321
2322         /* If we have not previously called iwl3945_init() then
2323          * clear all bits but the RF Kill bits and return */
2324         if (!iwl_legacy_is_init(priv)) {
2325                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2326                                         STATUS_RF_KILL_HW |
2327                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2328                                         STATUS_GEO_CONFIGURED |
2329                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2330                                         STATUS_EXIT_PENDING;
2331                 goto exit;
2332         }
2333
2334         /* ...otherwise clear out all the status bits but the RF Kill
2335          * bit and continue taking the NIC down. */
2336         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2337                                 STATUS_RF_KILL_HW |
2338                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2339                                 STATUS_GEO_CONFIGURED |
2340                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2341                                 STATUS_FW_ERROR |
2342                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2343                                 STATUS_EXIT_PENDING;
2344
2345         iwl3945_hw_txq_ctx_stop(priv);
2346         iwl3945_hw_rxq_stop(priv);
2347
2348         /* Power-down device's busmaster DMA clocks */
2349         iwl_legacy_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2350         udelay(5);
2351
2352         /* Stop the device, and put it in low power state */
2353         iwl_legacy_apm_stop(priv);
2354
2355  exit:
2356         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2357
2358         if (priv->beacon_skb)
2359                 dev_kfree_skb(priv->beacon_skb);
2360         priv->beacon_skb = NULL;
2361
2362         /* clear out any free frames */
2363         iwl3945_clear_free_frames(priv);
2364 }
2365
2366 static void iwl3945_down(struct iwl_priv *priv)
2367 {
2368         mutex_lock(&priv->mutex);
2369         __iwl3945_down(priv);
2370         mutex_unlock(&priv->mutex);
2371
2372         iwl3945_cancel_deferred_work(priv);
2373 }
2374
2375 #define MAX_HW_RESTARTS 5
2376
2377 static int iwl3945_alloc_bcast_station(struct iwl_priv *priv)
2378 {
2379         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2380         unsigned long flags;
2381         u8 sta_id;
2382
2383         spin_lock_irqsave(&priv->sta_lock, flags);
2384         sta_id = iwl_legacy_prep_station(priv, ctx,
2385                                         iwlegacy_bcast_addr, false, NULL);
2386         if (sta_id == IWL_INVALID_STATION) {
2387                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
2388                 spin_unlock_irqrestore(&priv->sta_lock, flags);
2389
2390                 return -EINVAL;
2391         }
2392
2393         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
2394         priv->stations[sta_id].used |= IWL_STA_BCAST;
2395         spin_unlock_irqrestore(&priv->sta_lock, flags);
2396
2397         return 0;
2398 }
2399
2400 static int __iwl3945_up(struct iwl_priv *priv)
2401 {
2402         int rc, i;
2403
2404         rc = iwl3945_alloc_bcast_station(priv);
2405         if (rc)
2406                 return rc;
2407
2408         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2409                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2410                 return -EIO;
2411         }
2412
2413         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2414                 IWL_ERR(priv, "ucode not available for device bring up\n");
2415                 return -EIO;
2416         }
2417
2418         /* If platform's RF_KILL switch is NOT set to KILL */
2419         if (iwl_read32(priv, CSR_GP_CNTRL) &
2420                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2421                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2422         else {
2423                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2424                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2425                 return -ENODEV;
2426         }
2427
2428         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2429
2430         rc = iwl3945_hw_nic_init(priv);
2431         if (rc) {
2432                 IWL_ERR(priv, "Unable to int nic\n");
2433                 return rc;
2434         }
2435
2436         /* make sure rfkill handshake bits are cleared */
2437         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2438         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2439                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2440
2441         /* clear (again), then enable host interrupts */
2442         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2443         iwl_legacy_enable_interrupts(priv);
2444
2445         /* really make sure rfkill handshake bits are cleared */
2446         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2447         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2448
2449         /* Copy original ucode data image from disk into backup cache.
2450          * This will be used to initialize the on-board processor's
2451          * data SRAM for a clean start when the runtime program first loads. */
2452         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2453                priv->ucode_data.len);
2454
2455         /* We return success when we resume from suspend and rf_kill is on. */
2456         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2457                 return 0;
2458
2459         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2460
2461                 /* load bootstrap state machine,
2462                  * load bootstrap program into processor's memory,
2463                  * prepare to load the "initialize" uCode */
2464                 rc = priv->cfg->ops->lib->load_ucode(priv);
2465
2466                 if (rc) {
2467                         IWL_ERR(priv,
2468                                 "Unable to set up bootstrap uCode: %d\n", rc);
2469                         continue;
2470                 }
2471
2472                 /* start card; "initialize" will load runtime ucode */
2473                 iwl3945_nic_start(priv);
2474
2475                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2476
2477                 return 0;
2478         }
2479
2480         set_bit(STATUS_EXIT_PENDING, &priv->status);
2481         __iwl3945_down(priv);
2482         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2483
2484         /* tried to restart and config the device for as long as our
2485          * patience could withstand */
2486         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2487         return -EIO;
2488 }
2489
2490
2491 /*****************************************************************************
2492  *
2493  * Workqueue callbacks
2494  *
2495  *****************************************************************************/
2496
2497 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2498 {
2499         struct iwl_priv *priv =
2500             container_of(data, struct iwl_priv, init_alive_start.work);
2501
2502         mutex_lock(&priv->mutex);
2503         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2504                 goto out;
2505
2506         iwl3945_init_alive_start(priv);
2507 out:
2508         mutex_unlock(&priv->mutex);
2509 }
2510
2511 static void iwl3945_bg_alive_start(struct work_struct *data)
2512 {
2513         struct iwl_priv *priv =
2514             container_of(data, struct iwl_priv, alive_start.work);
2515
2516         mutex_lock(&priv->mutex);
2517         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2518                 goto out;
2519
2520         iwl3945_alive_start(priv);
2521 out:
2522         mutex_unlock(&priv->mutex);
2523 }
2524
2525 /*
2526  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2527  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2528  * *is* readable even when device has been SW_RESET into low power mode
2529  * (e.g. during RF KILL).
2530  */
2531 static void iwl3945_rfkill_poll(struct work_struct *data)
2532 {
2533         struct iwl_priv *priv =
2534             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2535         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2536         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2537                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2538
2539         if (new_rfkill != old_rfkill) {
2540                 if (new_rfkill)
2541                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2542                 else
2543                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2544
2545                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2546
2547                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2548                                 new_rfkill ? "disable radio" : "enable radio");
2549         }
2550
2551         /* Keep this running, even if radio now enabled.  This will be
2552          * cancelled in mac_start() if system decides to start again */
2553         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2554                            round_jiffies_relative(2 * HZ));
2555
2556 }
2557
2558 int iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2559 {
2560         struct iwl_host_cmd cmd = {
2561                 .id = REPLY_SCAN_CMD,
2562                 .len = sizeof(struct iwl3945_scan_cmd),
2563                 .flags = CMD_SIZE_HUGE,
2564         };
2565         struct iwl3945_scan_cmd *scan;
2566         u8 n_probes = 0;
2567         enum ieee80211_band band;
2568         bool is_active = false;
2569         int ret;
2570         u16 len;
2571
2572         lockdep_assert_held(&priv->mutex);
2573
2574         if (!priv->scan_cmd) {
2575                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2576                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2577                 if (!priv->scan_cmd) {
2578                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2579                         return -ENOMEM;
2580                 }
2581         }
2582         scan = priv->scan_cmd;
2583         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2584
2585         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2586         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2587
2588         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS)) {
2589                 u16 interval;
2590                 u32 extra;
2591                 u32 suspend_time = 100;
2592                 u32 scan_suspend_time = 100;
2593
2594                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2595
2596                 interval = vif->bss_conf.beacon_int;
2597
2598                 scan->suspend_time = 0;
2599                 scan->max_out_time = cpu_to_le32(200 * 1024);
2600                 if (!interval)
2601                         interval = suspend_time;
2602                 /*
2603                  * suspend time format:
2604                  *  0-19: beacon interval in usec (time before exec.)
2605                  * 20-23: 0
2606                  * 24-31: number of beacons (suspend between channels)
2607                  */
2608
2609                 extra = (suspend_time / interval) << 24;
2610                 scan_suspend_time = 0xFF0FFFFF &
2611                     (extra | ((suspend_time % interval) * 1024));
2612
2613                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2614                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2615                                scan_suspend_time, interval);
2616         }
2617
2618         if (priv->scan_request->n_ssids) {
2619                 int i, p = 0;
2620                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2621                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2622                         /* always does wildcard anyway */
2623                         if (!priv->scan_request->ssids[i].ssid_len)
2624                                 continue;
2625                         scan->direct_scan[p].id = WLAN_EID_SSID;
2626                         scan->direct_scan[p].len =
2627                                 priv->scan_request->ssids[i].ssid_len;
2628                         memcpy(scan->direct_scan[p].ssid,
2629                                priv->scan_request->ssids[i].ssid,
2630                                priv->scan_request->ssids[i].ssid_len);
2631                         n_probes++;
2632                         p++;
2633                 }
2634                 is_active = true;
2635         } else
2636                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2637
2638         /* We don't build a direct scan probe request; the uCode will do
2639          * that based on the direct_mask added to each channel entry */
2640         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2641         scan->tx_cmd.sta_id = priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
2642         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2643
2644         /* flags + rate selection */
2645
2646         switch (priv->scan_band) {
2647         case IEEE80211_BAND_2GHZ:
2648                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2649                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2650                 band = IEEE80211_BAND_2GHZ;
2651                 break;
2652         case IEEE80211_BAND_5GHZ:
2653                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2654                 band = IEEE80211_BAND_5GHZ;
2655                 break;
2656         default:
2657                 IWL_WARN(priv, "Invalid scan band\n");
2658                 return -EIO;
2659         }
2660
2661         /*
2662          * If active scaning is requested but a certain channel
2663          * is marked passive, we can do active scanning if we
2664          * detect transmissions.
2665          */
2666         scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2667                                         IWL_GOOD_CRC_TH_DISABLED;
2668
2669         len = iwl_legacy_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
2670                                         vif->addr, priv->scan_request->ie,
2671                                         priv->scan_request->ie_len,
2672                                         IWL_MAX_SCAN_SIZE - sizeof(*scan));
2673         scan->tx_cmd.len = cpu_to_le16(len);
2674
2675         /* select Rx antennas */
2676         scan->flags |= iwl3945_get_antenna_flags(priv);
2677
2678         scan->channel_count = iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2679                                                             (void *)&scan->data[len], vif);
2680         if (scan->channel_count == 0) {
2681                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2682                 return -EIO;
2683         }
2684
2685         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2686             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2687         cmd.data = scan;
2688         scan->len = cpu_to_le16(cmd.len);
2689
2690         set_bit(STATUS_SCAN_HW, &priv->status);
2691         ret = iwl_legacy_send_cmd_sync(priv, &cmd);
2692         if (ret)
2693                 clear_bit(STATUS_SCAN_HW, &priv->status);
2694         return ret;
2695 }
2696
2697 void iwl3945_post_scan(struct iwl_priv *priv)
2698 {
2699         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2700
2701         /*
2702          * Since setting the RXON may have been deferred while
2703          * performing the scan, fire one off if needed
2704          */
2705         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
2706                 iwl3945_commit_rxon(priv, ctx);
2707 }
2708
2709 static void iwl3945_bg_restart(struct work_struct *data)
2710 {
2711         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2712
2713         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2714                 return;
2715
2716         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2717                 struct iwl_rxon_context *ctx;
2718                 mutex_lock(&priv->mutex);
2719                 for_each_context(priv, ctx)
2720                         ctx->vif = NULL;
2721                 priv->is_open = 0;
2722                 mutex_unlock(&priv->mutex);
2723                 iwl3945_down(priv);
2724                 ieee80211_restart_hw(priv->hw);
2725         } else {
2726                 iwl3945_down(priv);
2727
2728                 mutex_lock(&priv->mutex);
2729                 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2730                         mutex_unlock(&priv->mutex);
2731                         return;
2732                 }
2733
2734                 __iwl3945_up(priv);
2735                 mutex_unlock(&priv->mutex);
2736         }
2737 }
2738
2739 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2740 {
2741         struct iwl_priv *priv =
2742             container_of(data, struct iwl_priv, rx_replenish);
2743
2744         mutex_lock(&priv->mutex);
2745         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2746                 goto out;
2747
2748         iwl3945_rx_replenish(priv);
2749 out:
2750         mutex_unlock(&priv->mutex);
2751 }
2752
2753 void iwl3945_post_associate(struct iwl_priv *priv)
2754 {
2755         int rc = 0;
2756         struct ieee80211_conf *conf = NULL;
2757         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2758
2759         if (!ctx->vif || !priv->is_open)
2760                 return;
2761
2762         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2763                         ctx->vif->bss_conf.aid, ctx->active.bssid_addr);
2764
2765         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2766                 return;
2767
2768         iwl_legacy_scan_cancel_timeout(priv, 200);
2769
2770         conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
2771
2772         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2773         iwl3945_commit_rxon(priv, ctx);
2774
2775         rc = iwl_legacy_send_rxon_timing(priv, ctx);
2776         if (rc)
2777                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2778                             "Attempting to continue.\n");
2779
2780         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2781
2782         ctx->staging.assoc_id = cpu_to_le16(ctx->vif->bss_conf.aid);
2783
2784         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2785                         ctx->vif->bss_conf.aid, ctx->vif->bss_conf.beacon_int);
2786
2787         if (ctx->vif->bss_conf.use_short_preamble)
2788                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2789         else
2790                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2791
2792         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2793                 if (ctx->vif->bss_conf.use_short_slot)
2794                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2795                 else
2796                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2797         }
2798
2799         iwl3945_commit_rxon(priv, ctx);
2800
2801         switch (ctx->vif->type) {
2802         case NL80211_IFTYPE_STATION:
2803                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
2804                 break;
2805         case NL80211_IFTYPE_ADHOC:
2806                 iwl3945_send_beacon_cmd(priv);
2807                 break;
2808         default:
2809                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2810                         __func__, ctx->vif->type);
2811                 break;
2812         }
2813 }
2814
2815 /*****************************************************************************
2816  *
2817  * mac80211 entry point functions
2818  *
2819  *****************************************************************************/
2820
2821 #define UCODE_READY_TIMEOUT     (2 * HZ)
2822
2823 static int iwl3945_mac_start(struct ieee80211_hw *hw)
2824 {
2825         struct iwl_priv *priv = hw->priv;
2826         int ret;
2827
2828         IWL_DEBUG_MAC80211(priv, "enter\n");
2829
2830         /* we should be verifying the device is ready to be opened */
2831         mutex_lock(&priv->mutex);
2832
2833         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2834          * ucode filename and max sizes are card-specific. */
2835
2836         if (!priv->ucode_code.len) {
2837                 ret = iwl3945_read_ucode(priv);
2838                 if (ret) {
2839                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2840                         mutex_unlock(&priv->mutex);
2841                         goto out_release_irq;
2842                 }
2843         }
2844
2845         ret = __iwl3945_up(priv);
2846
2847         mutex_unlock(&priv->mutex);
2848
2849         if (ret)
2850                 goto out_release_irq;
2851
2852         IWL_DEBUG_INFO(priv, "Start UP work.\n");
2853
2854         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2855          * mac80211 will not be run successfully. */
2856         ret = wait_event_timeout(priv->wait_command_queue,
2857                         test_bit(STATUS_READY, &priv->status),
2858                         UCODE_READY_TIMEOUT);
2859         if (!ret) {
2860                 if (!test_bit(STATUS_READY, &priv->status)) {
2861                         IWL_ERR(priv,
2862                                 "Wait for START_ALIVE timeout after %dms.\n",
2863                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2864                         ret = -ETIMEDOUT;
2865                         goto out_release_irq;
2866                 }
2867         }
2868
2869         /* ucode is running and will send rfkill notifications,
2870          * no need to poll the killswitch state anymore */
2871         cancel_delayed_work(&priv->_3945.rfkill_poll);
2872
2873         priv->is_open = 1;
2874         IWL_DEBUG_MAC80211(priv, "leave\n");
2875         return 0;
2876
2877 out_release_irq:
2878         priv->is_open = 0;
2879         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
2880         return ret;
2881 }
2882
2883 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
2884 {
2885         struct iwl_priv *priv = hw->priv;
2886
2887         IWL_DEBUG_MAC80211(priv, "enter\n");
2888
2889         if (!priv->is_open) {
2890                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2891                 return;
2892         }
2893
2894         priv->is_open = 0;
2895
2896         iwl3945_down(priv);
2897
2898         flush_workqueue(priv->workqueue);
2899
2900         /* start polling the killswitch state again */
2901         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2902                            round_jiffies_relative(2 * HZ));
2903
2904         IWL_DEBUG_MAC80211(priv, "leave\n");
2905 }
2906
2907 static void iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2908 {
2909         struct iwl_priv *priv = hw->priv;
2910
2911         IWL_DEBUG_MAC80211(priv, "enter\n");
2912
2913         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2914                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2915
2916         if (iwl3945_tx_skb(priv, skb))
2917                 dev_kfree_skb_any(skb);
2918
2919         IWL_DEBUG_MAC80211(priv, "leave\n");
2920 }
2921
2922 void iwl3945_config_ap(struct iwl_priv *priv)
2923 {
2924         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2925         struct ieee80211_vif *vif = ctx->vif;
2926         int rc = 0;
2927
2928         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2929                 return;
2930
2931         /* The following should be done only at AP bring up */
2932         if (!(iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS))) {
2933
2934                 /* RXON - unassoc (to set timing command) */
2935                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2936                 iwl3945_commit_rxon(priv, ctx);
2937
2938                 /* RXON Timing */
2939                 rc = iwl_legacy_send_rxon_timing(priv, ctx);
2940                 if (rc)
2941                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2942                                         "Attempting to continue.\n");
2943
2944                 ctx->staging.assoc_id = 0;
2945
2946                 if (vif->bss_conf.use_short_preamble)
2947                         ctx->staging.flags |=
2948                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2949                 else
2950                         ctx->staging.flags &=
2951                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2952
2953                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2954                         if (vif->bss_conf.use_short_slot)
2955                                 ctx->staging.flags |=
2956                                         RXON_FLG_SHORT_SLOT_MSK;
2957                         else
2958                                 ctx->staging.flags &=
2959                                         ~RXON_FLG_SHORT_SLOT_MSK;
2960                 }
2961                 /* restore RXON assoc */
2962                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2963                 iwl3945_commit_rxon(priv, ctx);
2964         }
2965         iwl3945_send_beacon_cmd(priv);
2966 }
2967
2968 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2969                                struct ieee80211_vif *vif,
2970                                struct ieee80211_sta *sta,
2971                                struct ieee80211_key_conf *key)
2972 {
2973         struct iwl_priv *priv = hw->priv;
2974         int ret = 0;
2975         u8 sta_id = IWL_INVALID_STATION;
2976         u8 static_key;
2977
2978         IWL_DEBUG_MAC80211(priv, "enter\n");
2979
2980         if (iwl3945_mod_params.sw_crypto) {
2981                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2982                 return -EOPNOTSUPP;
2983         }
2984
2985         /*
2986          * To support IBSS RSN, don't program group keys in IBSS, the
2987          * hardware will then not attempt to decrypt the frames.
2988          */
2989         if (vif->type == NL80211_IFTYPE_ADHOC &&
2990             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2991                 return -EOPNOTSUPP;
2992
2993         static_key = !iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS);
2994
2995         if (!static_key) {
2996                 sta_id = iwl_legacy_sta_id_or_broadcast(
2997                                 priv, &priv->contexts[IWL_RXON_CTX_BSS], sta);
2998                 if (sta_id == IWL_INVALID_STATION)
2999                         return -EINVAL;
3000         }
3001
3002         mutex_lock(&priv->mutex);
3003         iwl_legacy_scan_cancel_timeout(priv, 100);
3004
3005         switch (cmd) {
3006         case SET_KEY:
3007                 if (static_key)
3008                         ret = iwl3945_set_static_key(priv, key);
3009                 else
3010                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3011                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3012                 break;
3013         case DISABLE_KEY:
3014                 if (static_key)
3015                         ret = iwl3945_remove_static_key(priv);
3016                 else
3017                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3018                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3019                 break;
3020         default:
3021                 ret = -EINVAL;
3022         }
3023
3024         mutex_unlock(&priv->mutex);
3025         IWL_DEBUG_MAC80211(priv, "leave\n");
3026
3027         return ret;
3028 }
3029
3030 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3031                                struct ieee80211_vif *vif,
3032                                struct ieee80211_sta *sta)
3033 {
3034         struct iwl_priv *priv = hw->priv;
3035         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3036         int ret;
3037         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3038         u8 sta_id;
3039
3040         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3041                         sta->addr);
3042         mutex_lock(&priv->mutex);
3043         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
3044                         sta->addr);
3045         sta_priv->common.sta_id = IWL_INVALID_STATION;
3046
3047
3048         ret = iwl_legacy_add_station_common(priv,
3049                                 &priv->contexts[IWL_RXON_CTX_BSS],
3050                                      sta->addr, is_ap, sta, &sta_id);
3051         if (ret) {
3052                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3053                         sta->addr, ret);
3054                 /* Should we return success if return code is EEXIST ? */
3055                 mutex_unlock(&priv->mutex);
3056                 return ret;
3057         }
3058
3059         sta_priv->common.sta_id = sta_id;
3060
3061         /* Initialize rate scaling */
3062         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3063                        sta->addr);
3064         iwl3945_rs_rate_init(priv, sta, sta_id);
3065         mutex_unlock(&priv->mutex);
3066
3067         return 0;
3068 }
3069
3070 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
3071                                      unsigned int changed_flags,
3072                                      unsigned int *total_flags,
3073                                      u64 multicast)
3074 {
3075         struct iwl_priv *priv = hw->priv;
3076         __le32 filter_or = 0, filter_nand = 0;
3077         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3078
3079 #define CHK(test, flag) do { \
3080         if (*total_flags & (test))              \
3081                 filter_or |= (flag);            \
3082         else                                    \
3083                 filter_nand |= (flag);          \
3084         } while (0)
3085
3086         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3087                         changed_flags, *total_flags);
3088
3089         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3090         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3091         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3092
3093 #undef CHK
3094
3095         mutex_lock(&priv->mutex);
3096
3097         ctx->staging.filter_flags &= ~filter_nand;
3098         ctx->staging.filter_flags |= filter_or;
3099
3100         /*
3101          * Not committing directly because hardware can perform a scan,
3102          * but even if hw is ready, committing here breaks for some reason,
3103          * we'll eventually commit the filter flags change anyway.
3104          */
3105
3106         mutex_unlock(&priv->mutex);
3107
3108         /*
3109          * Receiving all multicast frames is always enabled by the
3110          * default flags setup in iwl_legacy_connection_init_rx_config()
3111          * since we currently do not support programming multicast
3112          * filters into the device.
3113          */
3114         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3115                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3116 }
3117
3118
3119 /*****************************************************************************
3120  *
3121  * sysfs attributes
3122  *
3123  *****************************************************************************/
3124
3125 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
3126
3127 /*
3128  * The following adds a new attribute to the sysfs representation
3129  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3130  * used for controlling the debug level.
3131  *
3132  * See the level definitions in iwl for details.
3133  *
3134  * The debug_level being managed using sysfs below is a per device debug
3135  * level that is used instead of the global debug level if it (the per
3136  * device debug level) is set.
3137  */
3138 static ssize_t iwl3945_show_debug_level(struct device *d,
3139                                 struct device_attribute *attr, char *buf)
3140 {
3141         struct iwl_priv *priv = dev_get_drvdata(d);
3142         return sprintf(buf, "0x%08X\n", iwl_legacy_get_debug_level(priv));
3143 }
3144 static ssize_t iwl3945_store_debug_level(struct device *d,
3145                                 struct device_attribute *attr,
3146                                  const char *buf, size_t count)
3147 {
3148         struct iwl_priv *priv = dev_get_drvdata(d);
3149         unsigned long val;
3150         int ret;
3151
3152         ret = strict_strtoul(buf, 0, &val);
3153         if (ret)
3154                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3155         else {
3156                 priv->debug_level = val;
3157                 if (iwl_legacy_alloc_traffic_mem(priv))
3158                         IWL_ERR(priv,
3159                                 "Not enough memory to generate traffic log\n");
3160         }
3161         return strnlen(buf, count);
3162 }
3163
3164 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3165                         iwl3945_show_debug_level, iwl3945_store_debug_level);
3166
3167 #endif /* CONFIG_IWLWIFI_LEGACY_DEBUG */
3168
3169 static ssize_t iwl3945_show_temperature(struct device *d,
3170                                 struct device_attribute *attr, char *buf)
3171 {
3172         struct iwl_priv *priv = dev_get_drvdata(d);
3173
3174         if (!iwl_legacy_is_alive(priv))
3175                 return -EAGAIN;
3176
3177         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3178 }
3179
3180 static DEVICE_ATTR(temperature, S_IRUGO, iwl3945_show_temperature, NULL);
3181
3182 static ssize_t iwl3945_show_tx_power(struct device *d,
3183                              struct device_attribute *attr, char *buf)
3184 {
3185         struct iwl_priv *priv = dev_get_drvdata(d);
3186         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3187 }
3188
3189 static ssize_t iwl3945_store_tx_power(struct device *d,
3190                               struct device_attribute *attr,
3191                               const char *buf, size_t count)
3192 {
3193         struct iwl_priv *priv = dev_get_drvdata(d);
3194         char *p = (char *)buf;
3195         u32 val;
3196
3197         val = simple_strtoul(p, &p, 10);
3198         if (p == buf)
3199                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3200         else
3201                 iwl3945_hw_reg_set_txpower(priv, val);
3202
3203         return count;
3204 }
3205
3206 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, iwl3945_show_tx_power, iwl3945_store_tx_power);
3207
3208 static ssize_t iwl3945_show_flags(struct device *d,
3209                           struct device_attribute *attr, char *buf)
3210 {
3211         struct iwl_priv *priv = dev_get_drvdata(d);
3212         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3213
3214         return sprintf(buf, "0x%04X\n", ctx->active.flags);
3215 }
3216
3217 static ssize_t iwl3945_store_flags(struct device *d,
3218                            struct device_attribute *attr,
3219                            const char *buf, size_t count)
3220 {
3221         struct iwl_priv *priv = dev_get_drvdata(d);
3222         u32 flags = simple_strtoul(buf, NULL, 0);
3223         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3224
3225         mutex_lock(&priv->mutex);
3226         if (le32_to_cpu(ctx->staging.flags) != flags) {
3227                 /* Cancel any currently running scans... */
3228                 if (iwl_legacy_scan_cancel_timeout(priv, 100))
3229                         IWL_WARN(priv, "Could not cancel scan.\n");
3230                 else {
3231                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3232                                        flags);
3233                         ctx->staging.flags = cpu_to_le32(flags);
3234                         iwl3945_commit_rxon(priv, ctx);
3235                 }
3236         }
3237         mutex_unlock(&priv->mutex);
3238
3239         return count;
3240 }
3241
3242 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, iwl3945_show_flags, iwl3945_store_flags);
3243
3244 static ssize_t iwl3945_show_filter_flags(struct device *d,
3245                                  struct device_attribute *attr, char *buf)
3246 {
3247         struct iwl_priv *priv = dev_get_drvdata(d);
3248         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3249
3250         return sprintf(buf, "0x%04X\n",
3251                 le32_to_cpu(ctx->active.filter_flags));
3252 }
3253
3254 static ssize_t iwl3945_store_filter_flags(struct device *d,
3255                                   struct device_attribute *attr,
3256                                   const char *buf, size_t count)
3257 {
3258         struct iwl_priv *priv = dev_get_drvdata(d);
3259         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3260         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3261
3262         mutex_lock(&priv->mutex);
3263         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3264                 /* Cancel any currently running scans... */
3265                 if (iwl_legacy_scan_cancel_timeout(priv, 100))
3266                         IWL_WARN(priv, "Could not cancel scan.\n");
3267                 else {
3268                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3269                                        "0x%04X\n", filter_flags);
3270                         ctx->staging.filter_flags =
3271                                 cpu_to_le32(filter_flags);
3272                         iwl3945_commit_rxon(priv, ctx);
3273                 }
3274         }
3275         mutex_unlock(&priv->mutex);
3276
3277         return count;
3278 }
3279
3280 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, iwl3945_show_filter_flags,
3281                    iwl3945_store_filter_flags);
3282
3283 static ssize_t iwl3945_show_measurement(struct device *d,
3284                                 struct device_attribute *attr, char *buf)
3285 {
3286         struct iwl_priv *priv = dev_get_drvdata(d);
3287         struct iwl_spectrum_notification measure_report;
3288         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3289         u8 *data = (u8 *)&measure_report;
3290         unsigned long flags;
3291
3292         spin_lock_irqsave(&priv->lock, flags);
3293         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3294                 spin_unlock_irqrestore(&priv->lock, flags);
3295                 return 0;
3296         }
3297         memcpy(&measure_report, &priv->measure_report, size);
3298         priv->measurement_status = 0;
3299         spin_unlock_irqrestore(&priv->lock, flags);
3300
3301         while (size && (PAGE_SIZE - len)) {
3302                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3303                                    PAGE_SIZE - len, 1);
3304                 len = strlen(buf);
3305                 if (PAGE_SIZE - len)
3306                         buf[len++] = '\n';
3307
3308                 ofs += 16;
3309                 size -= min(size, 16U);
3310         }
3311
3312         return len;
3313 }
3314
3315 static ssize_t iwl3945_store_measurement(struct device *d,
3316                                  struct device_attribute *attr,
3317                                  const char *buf, size_t count)
3318 {
3319         struct iwl_priv *priv = dev_get_drvdata(d);
3320         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3321         struct ieee80211_measurement_params params = {
3322                 .channel = le16_to_cpu(ctx->active.channel),
3323                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3324                 .duration = cpu_to_le16(1),
3325         };
3326         u8 type = IWL_MEASURE_BASIC;
3327         u8 buffer[32];
3328         u8 channel;
3329
3330         if (count) {
3331                 char *p = buffer;
3332                 strncpy(buffer, buf, min(sizeof(buffer), count));
3333                 channel = simple_strtoul(p, NULL, 0);
3334                 if (channel)
3335                         params.channel = channel;
3336
3337                 p = buffer;
3338                 while (*p && *p != ' ')
3339                         p++;
3340                 if (*p)
3341                         type = simple_strtoul(p + 1, NULL, 0);
3342         }
3343
3344         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3345                        "channel %d (for '%s')\n", type, params.channel, buf);
3346         iwl3945_get_measurement(priv, &params, type);
3347
3348         return count;
3349 }
3350
3351 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3352                    iwl3945_show_measurement, iwl3945_store_measurement);
3353
3354 static ssize_t iwl3945_store_retry_rate(struct device *d,
3355                                 struct device_attribute *attr,
3356                                 const char *buf, size_t count)
3357 {
3358         struct iwl_priv *priv = dev_get_drvdata(d);
3359
3360         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3361         if (priv->retry_rate <= 0)
3362                 priv->retry_rate = 1;
3363
3364         return count;
3365 }
3366
3367 static ssize_t iwl3945_show_retry_rate(struct device *d,
3368                                struct device_attribute *attr, char *buf)
3369 {
3370         struct iwl_priv *priv = dev_get_drvdata(d);
3371         return sprintf(buf, "%d", priv->retry_rate);
3372 }
3373
3374 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, iwl3945_show_retry_rate,
3375                    iwl3945_store_retry_rate);
3376
3377
3378 static ssize_t iwl3945_show_channels(struct device *d,
3379                              struct device_attribute *attr, char *buf)
3380 {
3381         /* all this shit doesn't belong into sysfs anyway */
3382         return 0;
3383 }
3384
3385 static DEVICE_ATTR(channels, S_IRUSR, iwl3945_show_channels, NULL);
3386
3387 static ssize_t iwl3945_show_antenna(struct device *d,
3388                             struct device_attribute *attr, char *buf)
3389 {
3390         struct iwl_priv *priv = dev_get_drvdata(d);
3391
3392         if (!iwl_legacy_is_alive(priv))
3393                 return -EAGAIN;
3394
3395         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3396 }
3397
3398 static ssize_t iwl3945_store_antenna(struct device *d,
3399                              struct device_attribute *attr,
3400                              const char *buf, size_t count)
3401 {
3402         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3403         int ant;
3404
3405         if (count == 0)
3406                 return 0;
3407
3408         if (sscanf(buf, "%1i", &ant) != 1) {
3409                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3410                 return count;
3411         }
3412
3413         if ((ant >= 0) && (ant <= 2)) {
3414                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3415                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3416         } else
3417                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3418
3419
3420         return count;
3421 }
3422
3423 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, iwl3945_show_antenna, iwl3945_store_antenna);
3424
3425 static ssize_t iwl3945_show_status(struct device *d,
3426                            struct device_attribute *attr, char *buf)
3427 {
3428         struct iwl_priv *priv = dev_get_drvdata(d);
3429         if (!iwl_legacy_is_alive(priv))
3430                 return -EAGAIN;
3431         return sprintf(buf, "0x%08x\n", (int)priv->status);
3432 }
3433
3434 static DEVICE_ATTR(status, S_IRUGO, iwl3945_show_status, NULL);
3435
3436 static ssize_t iwl3945_dump_error_log(struct device *d,
3437                               struct device_attribute *attr,
3438                               const char *buf, size_t count)
3439 {
3440         struct iwl_priv *priv = dev_get_drvdata(d);
3441         char *p = (char *)buf;
3442
3443         if (p[0] == '1')
3444                 iwl3945_dump_nic_error_log(priv);
3445
3446         return strnlen(buf, count);
3447 }
3448
3449 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, iwl3945_dump_error_log);
3450
3451 /*****************************************************************************
3452  *
3453  * driver setup and tear down
3454  *
3455  *****************************************************************************/
3456
3457 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3458 {
3459         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3460
3461         init_waitqueue_head(&priv->wait_command_queue);
3462
3463         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3464         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3465         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3466         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3467         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3468
3469         iwl_legacy_setup_scan_deferred_work(priv);
3470
3471         iwl3945_hw_setup_deferred_work(priv);
3472
3473         init_timer(&priv->watchdog);
3474         priv->watchdog.data = (unsigned long)priv;
3475         priv->watchdog.function = iwl_legacy_bg_watchdog;
3476
3477         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3478                      iwl3945_irq_tasklet, (unsigned long)priv);
3479 }
3480
3481 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3482 {
3483         iwl3945_hw_cancel_deferred_work(priv);
3484
3485         cancel_delayed_work_sync(&priv->init_alive_start);
3486         cancel_delayed_work(&priv->alive_start);
3487
3488         iwl_legacy_cancel_scan_deferred_work(priv);
3489 }
3490
3491 static struct attribute *iwl3945_sysfs_entries[] = {
3492         &dev_attr_antenna.attr,
3493         &dev_attr_channels.attr,
3494         &dev_attr_dump_errors.attr,
3495         &dev_attr_flags.attr,
3496         &dev_attr_filter_flags.attr,
3497         &dev_attr_measurement.attr,
3498         &dev_attr_retry_rate.attr,
3499         &dev_attr_status.attr,
3500         &dev_attr_temperature.attr,
3501         &dev_attr_tx_power.attr,
3502 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
3503         &dev_attr_debug_level.attr,
3504 #endif
3505         NULL
3506 };
3507
3508 static struct attribute_group iwl3945_attribute_group = {
3509         .name = NULL,           /* put in device directory */
3510         .attrs = iwl3945_sysfs_entries,
3511 };
3512
3513 struct ieee80211_ops iwl3945_hw_ops = {
3514         .tx = iwl3945_mac_tx,
3515         .start = iwl3945_mac_start,
3516         .stop = iwl3945_mac_stop,
3517         .add_interface = iwl_legacy_mac_add_interface,
3518         .remove_interface = iwl_legacy_mac_remove_interface,
3519         .change_interface = iwl_legacy_mac_change_interface,
3520         .config = iwl_legacy_mac_config,
3521         .configure_filter = iwl3945_configure_filter,
3522         .set_key = iwl3945_mac_set_key,
3523         .conf_tx = iwl_legacy_mac_conf_tx,
3524         .reset_tsf = iwl_legacy_mac_reset_tsf,
3525         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
3526         .hw_scan = iwl_legacy_mac_hw_scan,
3527         .sta_add = iwl3945_mac_sta_add,
3528         .sta_remove = iwl_legacy_mac_sta_remove,
3529         .tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
3530 };
3531
3532 static int iwl3945_init_drv(struct iwl_priv *priv)
3533 {
3534         int ret;
3535         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3536
3537         priv->retry_rate = 1;
3538         priv->beacon_skb = NULL;
3539
3540         spin_lock_init(&priv->sta_lock);
3541         spin_lock_init(&priv->hcmd_lock);
3542
3543         INIT_LIST_HEAD(&priv->free_frames);
3544
3545         mutex_init(&priv->mutex);
3546
3547         priv->ieee_channels = NULL;
3548         priv->ieee_rates = NULL;
3549         priv->band = IEEE80211_BAND_2GHZ;
3550
3551         priv->iw_mode = NL80211_IFTYPE_STATION;
3552         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3553
3554         /* initialize force reset */
3555         priv->force_reset.reset_duration = IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3556
3557         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3558                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3559                          eeprom->version);
3560                 ret = -EINVAL;
3561                 goto err;
3562         }
3563         ret = iwl_legacy_init_channel_map(priv);
3564         if (ret) {
3565                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3566                 goto err;
3567         }
3568
3569         /* Set up txpower settings in driver for all channels */
3570         if (iwl3945_txpower_set_from_eeprom(priv)) {
3571                 ret = -EIO;
3572                 goto err_free_channel_map;
3573         }
3574
3575         ret = iwl_legacy_init_geos(priv);
3576         if (ret) {
3577                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3578                 goto err_free_channel_map;
3579         }
3580         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3581
3582         return 0;
3583
3584 err_free_channel_map:
3585         iwl_legacy_free_channel_map(priv);
3586 err:
3587         return ret;
3588 }
3589
3590 #define IWL3945_MAX_PROBE_REQUEST       200
3591
3592 static int iwl3945_setup_mac(struct iwl_priv *priv)
3593 {
3594         int ret;
3595         struct ieee80211_hw *hw = priv->hw;
3596
3597         hw->rate_control_algorithm = "iwl-3945-rs";
3598         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3599         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3600
3601         /* Tell mac80211 our characteristics */
3602         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3603                     IEEE80211_HW_SPECTRUM_MGMT;
3604
3605         hw->wiphy->interface_modes =
3606                 priv->contexts[IWL_RXON_CTX_BSS].interface_modes;
3607
3608         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3609                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
3610                             WIPHY_FLAG_IBSS_RSN;
3611
3612         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3613         /* we create the 802.11 header and a zero-length SSID element */
3614         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3615
3616         /* Default value; 4 EDCA QOS priorities */
3617         hw->queues = 4;
3618
3619         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3620                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3621                         &priv->bands[IEEE80211_BAND_2GHZ];
3622
3623         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3624                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3625                         &priv->bands[IEEE80211_BAND_5GHZ];
3626
3627         iwl_legacy_leds_init(priv);
3628
3629         ret = ieee80211_register_hw(priv->hw);
3630         if (ret) {
3631                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3632                 return ret;
3633         }
3634         priv->mac80211_registered = 1;
3635
3636         return 0;
3637 }
3638
3639 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3640 {
3641         int err = 0, i;
3642         struct iwl_priv *priv;
3643         struct ieee80211_hw *hw;
3644         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3645         struct iwl3945_eeprom *eeprom;
3646         unsigned long flags;
3647
3648         /***********************
3649          * 1. Allocating HW data
3650          * ********************/
3651
3652         /* mac80211 allocates memory for this device instance, including
3653          *   space for this driver's private structure */
3654         hw = iwl_legacy_alloc_all(cfg);
3655         if (hw == NULL) {
3656                 pr_err("Can not allocate network device\n");
3657                 err = -ENOMEM;
3658                 goto out;
3659         }
3660         priv = hw->priv;
3661         SET_IEEE80211_DEV(hw, &pdev->dev);
3662
3663         priv->cmd_queue = IWL39_CMD_QUEUE_NUM;
3664
3665         /* 3945 has only one valid context */
3666         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3667
3668         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3669                 priv->contexts[i].ctxid = i;
3670
3671         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3672         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3673         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3674         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3675         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3676         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3677         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3678                 BIT(NL80211_IFTYPE_STATION) |
3679                 BIT(NL80211_IFTYPE_ADHOC);
3680         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3681         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3682         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3683
3684         /*
3685          * Disabling hardware scan means that mac80211 will perform scans
3686          * "the hard way", rather than using device's scan.
3687          */
3688         if (iwl3945_mod_params.disable_hw_scan) {
3689                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3690                 iwl3945_hw_ops.hw_scan = NULL;
3691         }
3692
3693         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3694         priv->cfg = cfg;
3695         priv->pci_dev = pdev;
3696         priv->inta_mask = CSR_INI_SET_MASK;
3697
3698         if (iwl_legacy_alloc_traffic_mem(priv))
3699                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3700
3701         /***************************
3702          * 2. Initializing PCI bus
3703          * *************************/
3704         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3705                                 PCIE_LINK_STATE_CLKPM);
3706
3707         if (pci_enable_device(pdev)) {
3708                 err = -ENODEV;
3709                 goto out_ieee80211_free_hw;
3710         }
3711
3712         pci_set_master(pdev);
3713
3714         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3715         if (!err)
3716                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3717         if (err) {
3718                 IWL_WARN(priv, "No suitable DMA available.\n");
3719                 goto out_pci_disable_device;
3720         }
3721
3722         pci_set_drvdata(pdev, priv);
3723         err = pci_request_regions(pdev, DRV_NAME);
3724         if (err)
3725                 goto out_pci_disable_device;
3726
3727         /***********************
3728          * 3. Read REV Register
3729          * ********************/
3730         priv->hw_base = pci_iomap(pdev, 0, 0);
3731         if (!priv->hw_base) {
3732                 err = -ENODEV;
3733                 goto out_pci_release_regions;
3734         }
3735
3736         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3737                         (unsigned long long) pci_resource_len(pdev, 0));
3738         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3739
3740         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3741          * PCI Tx retries from interfering with C3 CPU state */
3742         pci_write_config_byte(pdev, 0x41, 0x00);
3743
3744         /* these spin locks will be used in apm_ops.init and EEPROM access
3745          * we should init now
3746          */
3747         spin_lock_init(&priv->reg_lock);
3748         spin_lock_init(&priv->lock);
3749
3750         /*
3751          * stop and reset the on-board processor just in case it is in a
3752          * strange state ... like being left stranded by a primary kernel
3753          * and this is now the kdump kernel trying to start up
3754          */
3755         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3756
3757         /***********************
3758          * 4. Read EEPROM
3759          * ********************/
3760
3761         /* Read the EEPROM */
3762         err = iwl_legacy_eeprom_init(priv);
3763         if (err) {
3764                 IWL_ERR(priv, "Unable to init EEPROM\n");
3765                 goto out_iounmap;
3766         }
3767         /* MAC Address location in EEPROM same for 3945/4965 */
3768         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3769         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
3770         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
3771
3772         /***********************
3773          * 5. Setup HW Constants
3774          * ********************/
3775         /* Device-specific setup */
3776         if (iwl3945_hw_set_hw_params(priv)) {
3777                 IWL_ERR(priv, "failed to set hw settings\n");
3778                 goto out_eeprom_free;
3779         }
3780
3781         /***********************
3782          * 6. Setup priv
3783          * ********************/
3784
3785         err = iwl3945_init_drv(priv);
3786         if (err) {
3787                 IWL_ERR(priv, "initializing driver failed\n");
3788                 goto out_unset_hw_params;
3789         }
3790
3791         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
3792                 priv->cfg->name);
3793
3794         /***********************
3795          * 7. Setup Services
3796          * ********************/
3797
3798         spin_lock_irqsave(&priv->lock, flags);
3799         iwl_legacy_disable_interrupts(priv);
3800         spin_unlock_irqrestore(&priv->lock, flags);
3801
3802         pci_enable_msi(priv->pci_dev);
3803
3804         err = request_irq(priv->pci_dev->irq, iwl_legacy_isr,
3805                           IRQF_SHARED, DRV_NAME, priv);
3806         if (err) {
3807                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3808                 goto out_disable_msi;
3809         }
3810
3811         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
3812         if (err) {
3813                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3814                 goto out_release_irq;
3815         }
3816
3817         iwl_legacy_set_rxon_channel(priv,
3818                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5],
3819                              &priv->contexts[IWL_RXON_CTX_BSS]);
3820         iwl3945_setup_deferred_work(priv);
3821         iwl3945_setup_rx_handlers(priv);
3822         iwl_legacy_power_initialize(priv);
3823
3824         /*********************************
3825          * 8. Setup and Register mac80211
3826          * *******************************/
3827
3828         iwl_legacy_enable_interrupts(priv);
3829
3830         err = iwl3945_setup_mac(priv);
3831         if (err)
3832                 goto  out_remove_sysfs;
3833
3834         err = iwl_legacy_dbgfs_register(priv, DRV_NAME);
3835         if (err)
3836                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3837
3838         /* Start monitoring the killswitch */
3839         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3840                            2 * HZ);
3841
3842         return 0;
3843
3844  out_remove_sysfs:
3845         destroy_workqueue(priv->workqueue);
3846         priv->workqueue = NULL;
3847         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
3848  out_release_irq:
3849         free_irq(priv->pci_dev->irq, priv);
3850  out_disable_msi:
3851         pci_disable_msi(priv->pci_dev);
3852         iwl_legacy_free_geos(priv);
3853         iwl_legacy_free_channel_map(priv);
3854  out_unset_hw_params:
3855         iwl3945_unset_hw_params(priv);
3856  out_eeprom_free:
3857         iwl_legacy_eeprom_free(priv);
3858  out_iounmap:
3859         pci_iounmap(pdev, priv->hw_base);
3860  out_pci_release_regions:
3861         pci_release_regions(pdev);
3862  out_pci_disable_device:
3863         pci_set_drvdata(pdev, NULL);
3864         pci_disable_device(pdev);
3865  out_ieee80211_free_hw:
3866         iwl_legacy_free_traffic_mem(priv);
3867         ieee80211_free_hw(priv->hw);
3868  out:
3869         return err;
3870 }
3871
3872 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
3873 {
3874         struct iwl_priv *priv = pci_get_drvdata(pdev);
3875         unsigned long flags;
3876
3877         if (!priv)
3878                 return;
3879
3880         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3881
3882         iwl_legacy_dbgfs_unregister(priv);
3883
3884         set_bit(STATUS_EXIT_PENDING, &priv->status);
3885
3886         iwl_legacy_leds_exit(priv);
3887
3888         if (priv->mac80211_registered) {
3889                 ieee80211_unregister_hw(priv->hw);
3890                 priv->mac80211_registered = 0;
3891         } else {
3892                 iwl3945_down(priv);
3893         }
3894
3895         /*
3896          * Make sure device is reset to low power before unloading driver.
3897          * This may be redundant with iwl_down(), but there are paths to
3898          * run iwl_down() without calling apm_ops.stop(), and there are
3899          * paths to avoid running iwl_down() at all before leaving driver.
3900          * This (inexpensive) call *makes sure* device is reset.
3901          */
3902         iwl_legacy_apm_stop(priv);
3903
3904         /* make sure we flush any pending irq or
3905          * tasklet for the driver
3906          */
3907         spin_lock_irqsave(&priv->lock, flags);
3908         iwl_legacy_disable_interrupts(priv);
3909         spin_unlock_irqrestore(&priv->lock, flags);
3910
3911         iwl3945_synchronize_irq(priv);
3912
3913         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
3914
3915         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
3916
3917         iwl3945_dealloc_ucode_pci(priv);
3918
3919         if (priv->rxq.bd)
3920                 iwl3945_rx_queue_free(priv, &priv->rxq);
3921         iwl3945_hw_txq_ctx_free(priv);
3922
3923         iwl3945_unset_hw_params(priv);
3924
3925         /*netif_stop_queue(dev); */
3926         flush_workqueue(priv->workqueue);
3927
3928         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
3929          * priv->workqueue... so we can't take down the workqueue
3930          * until now... */
3931         destroy_workqueue(priv->workqueue);
3932         priv->workqueue = NULL;
3933         iwl_legacy_free_traffic_mem(priv);
3934
3935         free_irq(pdev->irq, priv);
3936         pci_disable_msi(pdev);
3937
3938         pci_iounmap(pdev, priv->hw_base);
3939         pci_release_regions(pdev);
3940         pci_disable_device(pdev);
3941         pci_set_drvdata(pdev, NULL);
3942
3943         iwl_legacy_free_channel_map(priv);
3944         iwl_legacy_free_geos(priv);
3945         kfree(priv->scan_cmd);
3946         if (priv->beacon_skb)
3947                 dev_kfree_skb(priv->beacon_skb);
3948
3949         ieee80211_free_hw(priv->hw);
3950 }
3951
3952
3953 /*****************************************************************************
3954  *
3955  * driver and module entry point
3956  *
3957  *****************************************************************************/
3958
3959 static struct pci_driver iwl3945_driver = {
3960         .name = DRV_NAME,
3961         .id_table = iwl3945_hw_card_ids,
3962         .probe = iwl3945_pci_probe,
3963         .remove = __devexit_p(iwl3945_pci_remove),
3964         .driver.pm = IWL_LEGACY_PM_OPS,
3965 };
3966
3967 static int __init iwl3945_init(void)
3968 {
3969
3970         int ret;
3971         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3972         pr_info(DRV_COPYRIGHT "\n");
3973
3974         ret = iwl3945_rate_control_register();
3975         if (ret) {
3976                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3977                 return ret;
3978         }
3979
3980         ret = pci_register_driver(&iwl3945_driver);
3981         if (ret) {
3982                 pr_err("Unable to initialize PCI module\n");
3983                 goto error_register;
3984         }
3985
3986         return ret;
3987
3988 error_register:
3989         iwl3945_rate_control_unregister();
3990         return ret;
3991 }
3992
3993 static void __exit iwl3945_exit(void)
3994 {
3995         pci_unregister_driver(&iwl3945_driver);
3996         iwl3945_rate_control_unregister();
3997 }
3998
3999 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4000
4001 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4002 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4003 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4004 MODULE_PARM_DESC(swcrypto,
4005                 "using software crypto (default 1 [software])");
4006 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4007                 int, S_IRUGO);
4008 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
4009 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
4010 module_param_named(debug, iwlegacy_debug_level, uint, S_IRUGO | S_IWUSR);
4011 MODULE_PARM_DESC(debug, "debug output mask");
4012 #endif
4013 module_param_named(fw_restart, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4014 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
4015
4016 module_exit(iwl3945_exit);
4017 module_init(iwl3945_init);