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