SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #define DRV_NAME        "iwl3945"
  49
  50 #include "iwl-fh.h"
  51 #include "iwl-3945-fh.h"
  52 #include "iwl-commands.h"
  53 #include "iwl-sta.h"
  54 #include "iwl-3945.h"
  55 #include "iwl-helpers.h"
  56 #include "iwl-core.h"
  57 #include "iwl-dev.h"
  58
  59 /*
  60  * module name, copyright, version, etc.
  61  */
  62
  63 #define DRV_DESCRIPTION \
  64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  65
  66 #ifdef CONFIG_IWLWIFI_DEBUG
  67 #define VD "d"
  68 #else
  69 #define VD
  70 #endif
  71
  72 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  73 #define VS "s"
  74 #else
  75 #define VS
  76 #endif
  77
  78 #define IWL39_VERSION "1.2.26k" VD VS
  79 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  80 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  81 #define DRV_VERSION     IWL39_VERSION
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88
  89  /* module parameters */
  90 struct iwl_mod_params iwl3945_mod_params = {
  91         .sw_crypto = 1,
  92         .restart_fw = 1,
  93         /* the rest are 0 by default */
  94 };
  95
  96 /**
  97  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  98  * @priv: eeprom and antenna fields are used to determine antenna flags
  99  *
 100  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 101  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 102  *
 103  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 104  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 105  * IWL_ANTENNA_AUX       - Force AUX antenna
 106  */
 107 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 108 {
 109         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 110
 111         switch (iwl3945_mod_params.antenna) {
 112         case IWL_ANTENNA_DIVERSITY:
 113                 return 0;
 114
 115         case IWL_ANTENNA_MAIN:
 116                 if (eeprom->antenna_switch_type)
 117                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 118                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 119
 120         case IWL_ANTENNA_AUX:
 121                 if (eeprom->antenna_switch_type)
 122                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 123                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 124         }
 125
 126         /* bad antenna selector value */
 127         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 128                 iwl3945_mod_params.antenna);
 129
 130         return 0;               /* "diversity" is default if error */
 131 }
 132
 133 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 134                                    struct ieee80211_key_conf *keyconf,
 135                                    u8 sta_id)
 136 {
 137         unsigned long flags;
 138         __le16 key_flags = 0;
 139         int ret;
 140
 141         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 142         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 143
 144         if (sta_id == priv->hw_params.bcast_sta_id)
 145                 key_flags |= STA_KEY_MULTICAST_MSK;
 146
 147         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 148         keyconf->hw_key_idx = keyconf->keyidx;
 149         key_flags &= ~STA_KEY_FLG_INVALID;
 150
 151         spin_lock_irqsave(&priv->sta_lock, flags);
 152         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 153         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 154         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 155                keyconf->keylen);
 156
 157         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 161                         == STA_KEY_FLG_NO_ENC)
 162                 priv->stations[sta_id].sta.key.key_offset =
 163                                  iwl_get_free_ucode_key_index(priv);
 164         /* else, we are overriding an existing key => no need to allocated room
 165         * in uCode. */
 166
 167         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 168                 "no space for a new key");
 169
 170         priv->stations[sta_id].sta.key.key_flags = key_flags;
 171         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 172         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 173
 174         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 175
 176         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 177
 178         spin_unlock_irqrestore(&priv->sta_lock, flags);
 179
 180         return ret;
 181 }
 182
 183 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 184                                   struct ieee80211_key_conf *keyconf,
 185                                   u8 sta_id)
 186 {
 187         return -EOPNOTSUPP;
 188 }
 189
 190 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 191                                   struct ieee80211_key_conf *keyconf,
 192                                   u8 sta_id)
 193 {
 194         return -EOPNOTSUPP;
 195 }
 196
 197 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 198 {
 199         unsigned long flags;
 200
 201         spin_lock_irqsave(&priv->sta_lock, flags);
 202         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 203         memset(&priv->stations[sta_id].sta.key, 0,
 204                 sizeof(struct iwl4965_keyinfo));
 205         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 206         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 207         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 208         spin_unlock_irqrestore(&priv->sta_lock, flags);
 209
 210         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 211         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 212         return 0;
 213 }
 214
 215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 216                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 217 {
 218         int ret = 0;
 219
 220         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 221
 222         switch (keyconf->alg) {
 223         case ALG_CCMP:
 224                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 225                 break;
 226         case ALG_TKIP:
 227                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 228                 break;
 229         case ALG_WEP:
 230                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         default:
 233                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 234                 ret = -EINVAL;
 235         }
 236
 237         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 238                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 239                       sta_id, ret);
 240
 241         return ret;
 242 }
 243
 244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 245 {
 246         int ret = -EOPNOTSUPP;
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_set_static_key(struct iwl_priv *priv,
 252                                 struct ieee80211_key_conf *key)
 253 {
 254         if (key->alg == ALG_WEP)
 255                 return -EOPNOTSUPP;
 256
 257         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 258         return -EINVAL;
 259 }
 260
 261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 262 {
 263         struct list_head *element;
 264
 265         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 266                        priv->frames_count);
 267
 268         while (!list_empty(&priv->free_frames)) {
 269                 element = priv->free_frames.next;
 270                 list_del(element);
 271                 kfree(list_entry(element, struct iwl3945_frame, list));
 272                 priv->frames_count--;
 273         }
 274
 275         if (priv->frames_count) {
 276                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 277                             priv->frames_count);
 278                 priv->frames_count = 0;
 279         }
 280 }
 281
 282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 283 {
 284         struct iwl3945_frame *frame;
 285         struct list_head *element;
 286         if (list_empty(&priv->free_frames)) {
 287                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 288                 if (!frame) {
 289                         IWL_ERR(priv, "Could not allocate frame!\n");
 290                         return NULL;
 291                 }
 292
 293                 priv->frames_count++;
 294                 return frame;
 295         }
 296
 297         element = priv->free_frames.next;
 298         list_del(element);
 299         return list_entry(element, struct iwl3945_frame, list);
 300 }
 301
 302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 303 {
 304         memset(frame, 0, sizeof(*frame));
 305         list_add(&frame->list, &priv->free_frames);
 306 }
 307
 308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 309                                 struct ieee80211_hdr *hdr,
 310                                 int left)
 311 {
 312
 313         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 314             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 315              (priv->iw_mode != NL80211_IFTYPE_AP)))
 316                 return 0;
 317
 318         if (priv->ibss_beacon->len > left)
 319                 return 0;
 320
 321         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 322
 323         return priv->ibss_beacon->len;
 324 }
 325
 326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 327 {
 328         struct iwl3945_frame *frame;
 329         unsigned int frame_size;
 330         int rc;
 331         u8 rate;
 332
 333         frame = iwl3945_get_free_frame(priv);
 334
 335         if (!frame) {
 336                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 337                           "command.\n");
 338                 return -ENOMEM;
 339         }
 340
 341         rate = iwl_rate_get_lowest_plcp(priv);
 342
 343         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 344
 345         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 346                               &frame->u.cmd[0]);
 347
 348         iwl3945_free_frame(priv, frame);
 349
 350         return rc;
 351 }
 352
 353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 354 {
 355         if (priv->shared_virt)
 356                 pci_free_consistent(priv->pci_dev,
 357                                     sizeof(struct iwl3945_shared),
 358                                     priv->shared_virt,
 359                                     priv->shared_phys);
 360 }
 361
 362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 363                                       struct ieee80211_tx_info *info,
 364                                       struct iwl_device_cmd *cmd,
 365                                       struct sk_buff *skb_frag,
 366                                       int sta_id)
 367 {
 368         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 369         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 370
 371         switch (keyinfo->alg) {
 372         case ALG_CCMP:
 373                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 374                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 375                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 376                 break;
 377
 378         case ALG_TKIP:
 379                 break;
 380
 381         case ALG_WEP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 383                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 384
 385                 if (keyinfo->keylen == 13)
 386                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 387
 388                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 389
 390                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 391                              "with key %d\n", info->control.hw_key->hw_key_idx);
 392                 break;
 393
 394         default:
 395                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 396                 break;
 397         }
 398 }
 399
 400 /*
 401  * handle build REPLY_TX command notification.
 402  */
 403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 404                                   struct iwl_device_cmd *cmd,
 405                                   struct ieee80211_tx_info *info,
 406                                   struct ieee80211_hdr *hdr, u8 std_id)
 407 {
 408         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 409         __le32 tx_flags = tx_cmd->tx_flags;
 410         __le16 fc = hdr->frame_control;
 411
 412         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 413         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 414                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 415                 if (ieee80211_is_mgmt(fc))
 416                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 417                 if (ieee80211_is_probe_resp(fc) &&
 418                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 419                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 420         } else {
 421                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 422                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 423         }
 424
 425         tx_cmd->sta_id = std_id;
 426         if (ieee80211_has_morefrags(fc))
 427                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 428
 429         if (ieee80211_is_data_qos(fc)) {
 430                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 431                 tx_cmd->tid_tspec = qc[0] & 0xf;
 432                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 433         } else {
 434                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 435         }
 436
 437         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 438
 439         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 440                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 441
 442         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 443         if (ieee80211_is_mgmt(fc)) {
 444                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 445                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 446                 else
 447                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 448         } else {
 449                 tx_cmd->timeout.pm_frame_timeout = 0;
 450         }
 451
 452         tx_cmd->driver_txop = 0;
 453         tx_cmd->tx_flags = tx_flags;
 454         tx_cmd->next_frame_len = 0;
 455 }
 456
 457 /*
 458  * start REPLY_TX command process
 459  */
 460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 461 {
 462         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 463         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 464         struct iwl3945_tx_cmd *tx_cmd;
 465         struct iwl_tx_queue *txq = NULL;
 466         struct iwl_queue *q = NULL;
 467         struct iwl_device_cmd *out_cmd;
 468         struct iwl_cmd_meta *out_meta;
 469         dma_addr_t phys_addr;
 470         dma_addr_t txcmd_phys;
 471         int txq_id = skb_get_queue_mapping(skb);
 472         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 473         u8 id;
 474         u8 unicast;
 475         u8 sta_id;
 476         u8 tid = 0;
 477         u16 seq_number = 0;
 478         __le16 fc;
 479         u8 wait_write_ptr = 0;
 480         u8 *qc = NULL;
 481         unsigned long flags;
 482         int rc;
 483
 484         spin_lock_irqsave(&priv->lock, flags);
 485         if (iwl_is_rfkill(priv)) {
 486                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 487                 goto drop_unlock;
 488         }
 489
 490         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 491                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 492                 goto drop_unlock;
 493         }
 494
 495         unicast = !is_multicast_ether_addr(hdr->addr1);
 496         id = 0;
 497
 498         fc = hdr->frame_control;
 499
 500 #ifdef CONFIG_IWLWIFI_DEBUG
 501         if (ieee80211_is_auth(fc))
 502                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 503         else if (ieee80211_is_assoc_req(fc))
 504                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 505         else if (ieee80211_is_reassoc_req(fc))
 506                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 507 #endif
 508
 509         /* drop all non-injected data frame if we are not associated */
 510         if (ieee80211_is_data(fc) &&
 511             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 512             (!iwl_is_associated(priv) ||
 513              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 514                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 515                 goto drop_unlock;
 516         }
 517
 518         spin_unlock_irqrestore(&priv->lock, flags);
 519
 520         hdr_len = ieee80211_hdrlen(fc);
 521
 522         /* Find (or create) index into station table for destination station */
 523         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 524                 sta_id = priv->hw_params.bcast_sta_id;
 525         else
 526                 sta_id = iwl_get_sta_id(priv, hdr);
 527         if (sta_id == IWL_INVALID_STATION) {
 528                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 529                                hdr->addr1);
 530                 goto drop;
 531         }
 532
 533         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 534
 535         if (ieee80211_is_data_qos(fc)) {
 536                 qc = ieee80211_get_qos_ctl(hdr);
 537                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 538                 if (unlikely(tid >= MAX_TID_COUNT))
 539                         goto drop;
 540                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 541                                 IEEE80211_SCTL_SEQ;
 542                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 543                         (hdr->seq_ctrl &
 544                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 545                 seq_number += 0x10;
 546         }
 547
 548         /* Descriptor for chosen Tx queue */
 549         txq = &priv->txq[txq_id];
 550         q = &txq->q;
 551
 552         spin_lock_irqsave(&priv->lock, flags);
 553
 554         idx = get_cmd_index(q, q->write_ptr, 0);
 555
 556         /* Set up driver data for this TFD */
 557         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 558         txq->txb[q->write_ptr].skb[0] = skb;
 559
 560         /* Init first empty entry in queue's array of Tx/cmd buffers */
 561         out_cmd = txq->cmd[idx];
 562         out_meta = &txq->meta[idx];
 563         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 564         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 565         memset(tx_cmd, 0, sizeof(*tx_cmd));
 566
 567         /*
 568          * Set up the Tx-command (not MAC!) header.
 569          * Store the chosen Tx queue and TFD index within the sequence field;
 570          * after Tx, uCode's Tx response will return this value so driver can
 571          * locate the frame within the tx queue and do post-tx processing.
 572          */
 573         out_cmd->hdr.cmd = REPLY_TX;
 574         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 575                                 INDEX_TO_SEQ(q->write_ptr)));
 576
 577         /* Copy MAC header from skb into command buffer */
 578         memcpy(tx_cmd->hdr, hdr, hdr_len);
 579
 580
 581         if (info->control.hw_key)
 582                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 583
 584         /* TODO need this for burst mode later on */
 585         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 586
 587         /* set is_hcca to 0; it probably will never be implemented */
 588         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 589
 590         /* Total # bytes to be transmitted */
 591         len = (u16)skb->len;
 592         tx_cmd->len = cpu_to_le16(len);
 593
 594         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 595         iwl_update_stats(priv, true, fc, len);
 596         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 597         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 598
 599         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 600                 txq->need_update = 1;
 601                 if (qc)
 602                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 603         } else {
 604                 wait_write_ptr = 1;
 605                 txq->need_update = 0;
 606         }
 607
 608         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 609                      le16_to_cpu(out_cmd->hdr.sequence));
 610         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
 611         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 612         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 613                            ieee80211_hdrlen(fc));
 614
 615         /*
 616          * Use the first empty entry in this queue's command buffer array
 617          * to contain the Tx command and MAC header concatenated together
 618          * (payload data will be in another buffer).
 619          * Size of this varies, due to varying MAC header length.
 620          * If end is not dword aligned, we'll have 2 extra bytes at the end
 621          * of the MAC header (device reads on dword boundaries).
 622          * We'll tell device about this padding later.
 623          */
 624         len = sizeof(struct iwl3945_tx_cmd) +
 625                         sizeof(struct iwl_cmd_header) + hdr_len;
 626
 627         len_org = len;
 628         len = (len + 3) & ~3;
 629
 630         if (len_org != len)
 631                 len_org = 1;
 632         else
 633                 len_org = 0;
 634
 635         /* Physical address of this Tx command's header (not MAC header!),
 636          * within command buffer array. */
 637         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 638                                     len, PCI_DMA_TODEVICE);
 639         /* we do not map meta data ... so we can safely access address to
 640          * provide to unmap command*/
 641         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 642         pci_unmap_len_set(out_meta, len, len);
 643
 644         /* Add buffer containing Tx command and MAC(!) header to TFD's
 645          * first entry */
 646         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 647                                                    txcmd_phys, len, 1, 0);
 648
 649
 650         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 651          * if any (802.11 null frames have no payload). */
 652         len = skb->len - hdr_len;
 653         if (len) {
 654                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 655                                            len, PCI_DMA_TODEVICE);
 656                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 657                                                            phys_addr, len,
 658                                                            0, U32_PAD(len));
 659         }
 660
 661
 662         /* Tell device the write index *just past* this latest filled TFD */
 663         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 664         rc = iwl_txq_update_write_ptr(priv, txq);
 665         spin_unlock_irqrestore(&priv->lock, flags);
 666
 667         if (rc)
 668                 return rc;
 669
 670         if ((iwl_queue_space(q) < q->high_mark)
 671             && priv->mac80211_registered) {
 672                 if (wait_write_ptr) {
 673                         spin_lock_irqsave(&priv->lock, flags);
 674                         txq->need_update = 1;
 675                         iwl_txq_update_write_ptr(priv, txq);
 676                         spin_unlock_irqrestore(&priv->lock, flags);
 677                 }
 678
 679                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 680         }
 681
 682         return 0;
 683
 684 drop_unlock:
 685         spin_unlock_irqrestore(&priv->lock, flags);
 686 drop:
 687         return -1;
 688 }
 689
 690 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 691
 692 #include "iwl-spectrum.h"
 693
 694 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 695 #define BEACON_TIME_MASK_HIGH   0xFF000000
 696 #define TIME_UNIT               1024
 697
 698 /*
 699  * extended beacon time format
 700  * time in usec will be changed into a 32-bit value in 8:24 format
 701  * the high 1 byte is the beacon counts
 702  * the lower 3 bytes is the time in usec within one beacon interval
 703  */
 704
 705 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 706 {
 707         u32 quot;
 708         u32 rem;
 709         u32 interval = beacon_interval * 1024;
 710
 711         if (!interval || !usec)
 712                 return 0;
 713
 714         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 715         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 716
 717         return (quot << 24) + rem;
 718 }
 719
 720 /* base is usually what we get from ucode with each received frame,
 721  * the same as HW timer counter counting down
 722  */
 723
 724 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 725 {
 726         u32 base_low = base & BEACON_TIME_MASK_LOW;
 727         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 728         u32 interval = beacon_interval * TIME_UNIT;
 729         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 730             (addon & BEACON_TIME_MASK_HIGH);
 731
 732         if (base_low > addon_low)
 733                 res += base_low - addon_low;
 734         else if (base_low < addon_low) {
 735                 res += interval + base_low - addon_low;
 736                 res += (1 << 24);
 737         } else
 738                 res += (1 << 24);
 739
 740         return cpu_to_le32(res);
 741 }
 742
 743 static int iwl3945_get_measurement(struct iwl_priv *priv,
 744                                struct ieee80211_measurement_params *params,
 745                                u8 type)
 746 {
 747         struct iwl_spectrum_cmd spectrum;
 748         struct iwl_rx_packet *pkt;
 749         struct iwl_host_cmd cmd = {
 750                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 751                 .data = (void *)&spectrum,
 752                 .flags = CMD_WANT_SKB,
 753         };
 754         u32 add_time = le64_to_cpu(params->start_time);
 755         int rc;
 756         int spectrum_resp_status;
 757         int duration = le16_to_cpu(params->duration);
 758
 759         if (iwl_is_associated(priv))
 760                 add_time =
 761                     iwl3945_usecs_to_beacons(
 762                         le64_to_cpu(params->start_time) - priv->last_tsf,
 763                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 764
 765         memset(&spectrum, 0, sizeof(spectrum));
 766
 767         spectrum.channel_count = cpu_to_le16(1);
 768         spectrum.flags =
 769             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 770         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 771         cmd.len = sizeof(spectrum);
 772         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 773
 774         if (iwl_is_associated(priv))
 775                 spectrum.start_time =
 776                     iwl3945_add_beacon_time(priv->last_beacon_time,
 777                                 add_time,
 778                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 779         else
 780                 spectrum.start_time = 0;
 781
 782         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 783         spectrum.channels[0].channel = params->channel;
 784         spectrum.channels[0].type = type;
 785         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 786                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 787                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 788
 789         rc = iwl_send_cmd_sync(priv, &cmd);
 790         if (rc)
 791                 return rc;
 792
 793         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 794         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 795                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 796                 rc = -EIO;
 797         }
 798
 799         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 800         switch (spectrum_resp_status) {
 801         case 0:         /* Command will be handled */
 802                 if (pkt->u.spectrum.id != 0xff) {
 803                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 804                                                 pkt->u.spectrum.id);
 805                         priv->measurement_status &= ~MEASUREMENT_READY;
 806                 }
 807                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 808                 rc = 0;
 809                 break;
 810
 811         case 1:         /* Command will not be handled */
 812                 rc = -EAGAIN;
 813                 break;
 814         }
 815
 816         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 817
 818         return rc;
 819 }
 820 #endif
 821
 822 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 823                                struct iwl_rx_mem_buffer *rxb)
 824 {
 825         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 826         struct iwl_alive_resp *palive;
 827         struct delayed_work *pwork;
 828
 829         palive = &pkt->u.alive_frame;
 830
 831         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 832                        "0x%01X 0x%01X\n",
 833                        palive->is_valid, palive->ver_type,
 834                        palive->ver_subtype);
 835
 836         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 837                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 838                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 839                        sizeof(struct iwl_alive_resp));
 840                 pwork = &priv->init_alive_start;
 841         } else {
 842                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 843                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 844                        sizeof(struct iwl_alive_resp));
 845                 pwork = &priv->alive_start;
 846                 iwl3945_disable_events(priv);
 847         }
 848
 849         /* We delay the ALIVE response by 5ms to
 850          * give the HW RF Kill time to activate... */
 851         if (palive->is_valid == UCODE_VALID_OK)
 852                 queue_delayed_work(priv->workqueue, pwork,
 853                                    msecs_to_jiffies(5));
 854         else
 855                 IWL_WARN(priv, "uCode did not respond OK.\n");
 856 }
 857
 858 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 859                                  struct iwl_rx_mem_buffer *rxb)
 860 {
 861 #ifdef CONFIG_IWLWIFI_DEBUG
 862         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 863 #endif
 864
 865         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 866         return;
 867 }
 868
 869 static void iwl3945_bg_beacon_update(struct work_struct *work)
 870 {
 871         struct iwl_priv *priv =
 872                 container_of(work, struct iwl_priv, beacon_update);
 873         struct sk_buff *beacon;
 874
 875         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 876         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 877
 878         if (!beacon) {
 879                 IWL_ERR(priv, "update beacon failed\n");
 880                 return;
 881         }
 882
 883         mutex_lock(&priv->mutex);
 884         /* new beacon skb is allocated every time; dispose previous.*/
 885         if (priv->ibss_beacon)
 886                 dev_kfree_skb(priv->ibss_beacon);
 887
 888         priv->ibss_beacon = beacon;
 889         mutex_unlock(&priv->mutex);
 890
 891         iwl3945_send_beacon_cmd(priv);
 892 }
 893
 894 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 895                                 struct iwl_rx_mem_buffer *rxb)
 896 {
 897 #ifdef CONFIG_IWLWIFI_DEBUG
 898         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 899         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 900         u8 rate = beacon->beacon_notify_hdr.rate;
 901
 902         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 903                 "tsf %d %d rate %d\n",
 904                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 905                 beacon->beacon_notify_hdr.failure_frame,
 906                 le32_to_cpu(beacon->ibss_mgr_status),
 907                 le32_to_cpu(beacon->high_tsf),
 908                 le32_to_cpu(beacon->low_tsf), rate);
 909 #endif
 910
 911         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 912             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 913                 queue_work(priv->workqueue, &priv->beacon_update);
 914 }
 915
 916 /* Handle notification from uCode that card's power state is changing
 917  * due to software, hardware, or critical temperature RFKILL */
 918 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 919                                     struct iwl_rx_mem_buffer *rxb)
 920 {
 921         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 922         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 923         unsigned long status = priv->status;
 924
 925         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 926                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 927                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 928
 929         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 930                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 931
 932         if (flags & HW_CARD_DISABLED)
 933                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 934         else
 935                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 936
 937
 938         iwl_scan_cancel(priv);
 939
 940         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 941              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 942                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 943                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 944         else
 945                 wake_up_interruptible(&priv->wait_command_queue);
 946 }
 947
 948 /**
 949  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 950  *
 951  * Setup the RX handlers for each of the reply types sent from the uCode
 952  * to the host.
 953  *
 954  * This function chains into the hardware specific files for them to setup
 955  * any hardware specific handlers as well.
 956  */
 957 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 958 {
 959         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 960         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 961         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 962         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 963         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 964         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 965             iwl_rx_pm_debug_statistics_notif;
 966         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 967
 968         /*
 969          * The same handler is used for both the REPLY to a discrete
 970          * statistics request from the host as well as for the periodic
 971          * statistics notifications (after received beacons) from the uCode.
 972          */
 973         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 974         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 975
 976         iwl_setup_spectrum_handlers(priv);
 977         iwl_setup_rx_scan_handlers(priv);
 978         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 979
 980         /* Set up hardware specific Rx handlers */
 981         iwl3945_hw_rx_handler_setup(priv);
 982 }
 983
 984 /************************** RX-FUNCTIONS ****************************/
 985 /*
 986  * Rx theory of operation
 987  *
 988  * The host allocates 32 DMA target addresses and passes the host address
 989  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 990  * 0 to 31
 991  *
 992  * Rx Queue Indexes
 993  * The host/firmware share two index registers for managing the Rx buffers.
 994  *
 995  * The READ index maps to the first position that the firmware may be writing
 996  * to -- the driver can read up to (but not including) this position and get
 997  * good data.
 998  * The READ index is managed by the firmware once the card is enabled.
 999  *
1000  * The WRITE index maps to the last position the driver has read from -- the
1001  * position preceding WRITE is the last slot the firmware can place a packet.
1002  *
1003  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1004  * WRITE = READ.
1005  *
1006  * During initialization, the host sets up the READ queue position to the first
1007  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1008  *
1009  * When the firmware places a packet in a buffer, it will advance the READ index
1010  * and fire the RX interrupt.  The driver can then query the READ index and
1011  * process as many packets as possible, moving the WRITE index forward as it
1012  * resets the Rx queue buffers with new memory.
1013  *
1014  * The management in the driver is as follows:
1015  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1016  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1017  *   to replenish the iwl->rxq->rx_free.
1018  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1019  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1020  *   'processed' and 'read' driver indexes as well)
1021  * + A received packet is processed and handed to the kernel network stack,
1022  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1023  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1024  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1025  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1026  *   were enough free buffers and RX_STALLED is set it is cleared.
1027  *
1028  *
1029  * Driver sequence:
1030  *
1031  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1032  *                            iwl3945_rx_queue_restock
1033  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1034  *                            queue, updates firmware pointers, and updates
1035  *                            the WRITE index.  If insufficient rx_free buffers
1036  *                            are available, schedules iwl3945_rx_replenish
1037  *
1038  * -- enable interrupts --
1039  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1040  *                            READ INDEX, detaching the SKB from the pool.
1041  *                            Moves the packet buffer from queue to rx_used.
1042  *                            Calls iwl3945_rx_queue_restock to refill any empty
1043  *                            slots.
1044  * ...
1045  *
1046  */
1047
1048 /**
1049  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1050  */
1051 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1052                                           dma_addr_t dma_addr)
1053 {
1054         return cpu_to_le32((u32)dma_addr);
1055 }
1056
1057 /**
1058  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1059  *
1060  * If there are slots in the RX queue that need to be restocked,
1061  * and we have free pre-allocated buffers, fill the ranks as much
1062  * as we can, pulling from rx_free.
1063  *
1064  * This moves the 'write' index forward to catch up with 'processed', and
1065  * also updates the memory address in the firmware to reference the new
1066  * target buffer.
1067  */
1068 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1069 {
1070         struct iwl_rx_queue *rxq = &priv->rxq;
1071         struct list_head *element;
1072         struct iwl_rx_mem_buffer *rxb;
1073         unsigned long flags;
1074         int write, rc;
1075
1076         spin_lock_irqsave(&rxq->lock, flags);
1077         write = rxq->write & ~0x7;
1078         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1079                 /* Get next free Rx buffer, remove from free list */
1080                 element = rxq->rx_free.next;
1081                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1082                 list_del(element);
1083
1084                 /* Point to Rx buffer via next RBD in circular buffer */
1085                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1086                 rxq->queue[rxq->write] = rxb;
1087                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1088                 rxq->free_count--;
1089         }
1090         spin_unlock_irqrestore(&rxq->lock, flags);
1091         /* If the pre-allocated buffer pool is dropping low, schedule to
1092          * refill it */
1093         if (rxq->free_count <= RX_LOW_WATERMARK)
1094                 queue_work(priv->workqueue, &priv->rx_replenish);
1095
1096
1097         /* If we've added more space for the firmware to place data, tell it.
1098          * Increment device's write pointer in multiples of 8. */
1099         if ((rxq->write_actual != (rxq->write & ~0x7))
1100             || (abs(rxq->write - rxq->read) > 7)) {
1101                 spin_lock_irqsave(&rxq->lock, flags);
1102                 rxq->need_update = 1;
1103                 spin_unlock_irqrestore(&rxq->lock, flags);
1104                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1105                 if (rc)
1106                         return rc;
1107         }
1108
1109         return 0;
1110 }
1111
1112 /**
1113  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1114  *
1115  * When moving to rx_free an SKB is allocated for the slot.
1116  *
1117  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1118  * This is called as a scheduled work item (except for during initialization)
1119  */
1120 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1121 {
1122         struct iwl_rx_queue *rxq = &priv->rxq;
1123         struct list_head *element;
1124         struct iwl_rx_mem_buffer *rxb;
1125         struct page *page;
1126         unsigned long flags;
1127         gfp_t gfp_mask = priority;
1128
1129         while (1) {
1130                 spin_lock_irqsave(&rxq->lock, flags);
1131
1132                 if (list_empty(&rxq->rx_used)) {
1133                         spin_unlock_irqrestore(&rxq->lock, flags);
1134                         return;
1135                 }
1136                 spin_unlock_irqrestore(&rxq->lock, flags);
1137
1138                 if (rxq->free_count > RX_LOW_WATERMARK)
1139                         gfp_mask |= __GFP_NOWARN;
1140
1141                 if (priv->hw_params.rx_page_order > 0)
1142                         gfp_mask |= __GFP_COMP;
1143
1144                 /* Alloc a new receive buffer */
1145                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1146                 if (!page) {
1147                         if (net_ratelimit())
1148                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1149                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1150                             net_ratelimit())
1151                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1152                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1153                                          rxq->free_count);
1154                         /* We don't reschedule replenish work here -- we will
1155                          * call the restock method and if it still needs
1156                          * more buffers it will schedule replenish */
1157                         break;
1158                 }
1159
1160                 spin_lock_irqsave(&rxq->lock, flags);
1161                 if (list_empty(&rxq->rx_used)) {
1162                         spin_unlock_irqrestore(&rxq->lock, flags);
1163                         __free_pages(page, priv->hw_params.rx_page_order);
1164                         return;
1165                 }
1166                 element = rxq->rx_used.next;
1167                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1168                 list_del(element);
1169                 spin_unlock_irqrestore(&rxq->lock, flags);
1170
1171                 rxb->page = page;
1172                 /* Get physical address of RB/SKB */
1173                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1174                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1175                                 PCI_DMA_FROMDEVICE);
1176
1177                 spin_lock_irqsave(&rxq->lock, flags);
1178
1179                 list_add_tail(&rxb->list, &rxq->rx_free);
1180                 rxq->free_count++;
1181                 priv->alloc_rxb_page++;
1182
1183                 spin_unlock_irqrestore(&rxq->lock, flags);
1184         }
1185 }
1186
1187 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1188 {
1189         unsigned long flags;
1190         int i;
1191         spin_lock_irqsave(&rxq->lock, flags);
1192         INIT_LIST_HEAD(&rxq->rx_free);
1193         INIT_LIST_HEAD(&rxq->rx_used);
1194         /* Fill the rx_used queue with _all_ of the Rx buffers */
1195         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1196                 /* In the reset function, these buffers may have been allocated
1197                  * to an SKB, so we need to unmap and free potential storage */
1198                 if (rxq->pool[i].page != NULL) {
1199                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1200                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1201                                 PCI_DMA_FROMDEVICE);
1202                         priv->alloc_rxb_page--;
1203                         __free_pages(rxq->pool[i].page,
1204                                      priv->hw_params.rx_page_order);
1205                         rxq->pool[i].page = NULL;
1206                 }
1207                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1208         }
1209
1210         /* Set us so that we have processed and used all buffers, but have
1211          * not restocked the Rx queue with fresh buffers */
1212         rxq->read = rxq->write = 0;
1213         rxq->write_actual = 0;
1214         rxq->free_count = 0;
1215         spin_unlock_irqrestore(&rxq->lock, flags);
1216 }
1217
1218 void iwl3945_rx_replenish(void *data)
1219 {
1220         struct iwl_priv *priv = data;
1221         unsigned long flags;
1222
1223         iwl3945_rx_allocate(priv, GFP_KERNEL);
1224
1225         spin_lock_irqsave(&priv->lock, flags);
1226         iwl3945_rx_queue_restock(priv);
1227         spin_unlock_irqrestore(&priv->lock, flags);
1228 }
1229
1230 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1231 {
1232         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1233
1234         iwl3945_rx_queue_restock(priv);
1235 }
1236
1237
1238 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1239  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1240  * This free routine walks the list of POOL entries and if SKB is set to
1241  * non NULL it is unmapped and freed
1242  */
1243 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1244 {
1245         int i;
1246         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1247                 if (rxq->pool[i].page != NULL) {
1248                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1249                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1250                                 PCI_DMA_FROMDEVICE);
1251                         __free_pages(rxq->pool[i].page,
1252                                      priv->hw_params.rx_page_order);
1253                         rxq->pool[i].page = NULL;
1254                         priv->alloc_rxb_page--;
1255                 }
1256         }
1257
1258         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1259                             rxq->dma_addr);
1260         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1261                             rxq->rb_stts, rxq->rb_stts_dma);
1262         rxq->bd = NULL;
1263         rxq->rb_stts  = NULL;
1264 }
1265
1266
1267 /* Convert linear signal-to-noise ratio into dB */
1268 static u8 ratio2dB[100] = {
1269 /*       0   1   2   3   4   5   6   7   8   9 */
1270          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1271         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1272         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1273         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1274         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1275         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1276         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1277         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1278         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1279         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1280 };
1281
1282 /* Calculates a relative dB value from a ratio of linear
1283  *   (i.e. not dB) signal levels.
1284  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1285 int iwl3945_calc_db_from_ratio(int sig_ratio)
1286 {
1287         /* 1000:1 or higher just report as 60 dB */
1288         if (sig_ratio >= 1000)
1289                 return 60;
1290
1291         /* 100:1 or higher, divide by 10 and use table,
1292          *   add 20 dB to make up for divide by 10 */
1293         if (sig_ratio >= 100)
1294                 return 20 + (int)ratio2dB[sig_ratio/10];
1295
1296         /* We shouldn't see this */
1297         if (sig_ratio < 1)
1298                 return 0;
1299
1300         /* Use table for ratios 1:1 - 99:1 */
1301         return (int)ratio2dB[sig_ratio];
1302 }
1303
1304 #define PERFECT_RSSI (-20) /* dBm */
1305 #define WORST_RSSI (-95)   /* dBm */
1306 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1307
1308 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1309  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1310  *   about formulas used below. */
1311 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1312 {
1313         int sig_qual;
1314         int degradation = PERFECT_RSSI - rssi_dbm;
1315
1316         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1317          * as indicator; formula is (signal dbm - noise dbm).
1318          * SNR at or above 40 is a great signal (100%).
1319          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1320          * Weakest usable signal is usually 10 - 15 dB SNR. */
1321         if (noise_dbm) {
1322                 if (rssi_dbm - noise_dbm >= 40)
1323                         return 100;
1324                 else if (rssi_dbm < noise_dbm)
1325                         return 0;
1326                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1327
1328         /* Else use just the signal level.
1329          * This formula is a least squares fit of data points collected and
1330          *   compared with a reference system that had a percentage (%) display
1331          *   for signal quality. */
1332         } else
1333                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1334                             (15 * RSSI_RANGE + 62 * degradation)) /
1335                            (RSSI_RANGE * RSSI_RANGE);
1336
1337         if (sig_qual > 100)
1338                 sig_qual = 100;
1339         else if (sig_qual < 1)
1340                 sig_qual = 0;
1341
1342         return sig_qual;
1343 }
1344
1345 /**
1346  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1347  *
1348  * Uses the priv->rx_handlers callback function array to invoke
1349  * the appropriate handlers, including command responses,
1350  * frame-received notifications, and other notifications.
1351  */
1352 static void iwl3945_rx_handle(struct iwl_priv *priv)
1353 {
1354         struct iwl_rx_mem_buffer *rxb;
1355         struct iwl_rx_packet *pkt;
1356         struct iwl_rx_queue *rxq = &priv->rxq;
1357         u32 r, i;
1358         int reclaim;
1359         unsigned long flags;
1360         u8 fill_rx = 0;
1361         u32 count = 8;
1362         int total_empty = 0;
1363
1364         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1365          * buffer that the driver may process (last buffer filled by ucode). */
1366         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1367         i = rxq->read;
1368
1369         /* calculate total frames need to be restock after handling RX */
1370         total_empty = r - rxq->write_actual;
1371         if (total_empty < 0)
1372                 total_empty += RX_QUEUE_SIZE;
1373
1374         if (total_empty > (RX_QUEUE_SIZE / 2))
1375                 fill_rx = 1;
1376         /* Rx interrupt, but nothing sent from uCode */
1377         if (i == r)
1378                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1379
1380         while (i != r) {
1381                 rxb = rxq->queue[i];
1382
1383                 /* If an RXB doesn't have a Rx queue slot associated with it,
1384                  * then a bug has been introduced in the queue refilling
1385                  * routines -- catch it here */
1386                 BUG_ON(rxb == NULL);
1387
1388                 rxq->queue[i] = NULL;
1389
1390                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1391                                PAGE_SIZE << priv->hw_params.rx_page_order,
1392                                PCI_DMA_FROMDEVICE);
1393                 pkt = rxb_addr(rxb);
1394
1395                 trace_iwlwifi_dev_rx(priv, pkt,
1396                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1397
1398                 /* Reclaim a command buffer only if this packet is a response
1399                  *   to a (driver-originated) command.
1400                  * If the packet (e.g. Rx frame) originated from uCode,
1401                  *   there is no command buffer to reclaim.
1402                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1403                  *   but apparently a few don't get set; catch them here. */
1404                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1405                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1406                         (pkt->hdr.cmd != REPLY_TX);
1407
1408                 /* Based on type of command response or notification,
1409                  *   handle those that need handling via function in
1410                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1411                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1412                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1413                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1414                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1415                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1416                 } else {
1417                         /* No handling needed */
1418                         IWL_DEBUG_RX(priv,
1419                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1420                                 r, i, get_cmd_string(pkt->hdr.cmd),
1421                                 pkt->hdr.cmd);
1422                 }
1423
1424                 /*
1425                  * XXX: After here, we should always check rxb->page
1426                  * against NULL before touching it or its virtual
1427                  * memory (pkt). Because some rx_handler might have
1428                  * already taken or freed the pages.
1429                  */
1430
1431                 if (reclaim) {
1432                         /* Invoke any callbacks, transfer the buffer to caller,
1433                          * and fire off the (possibly) blocking iwl_send_cmd()
1434                          * as we reclaim the driver command queue */
1435                         if (rxb->page)
1436                                 iwl_tx_cmd_complete(priv, rxb);
1437                         else
1438                                 IWL_WARN(priv, "Claim null rxb?\n");
1439                 }
1440
1441                 /* Reuse the page if possible. For notification packets and
1442                  * SKBs that fail to Rx correctly, add them back into the
1443                  * rx_free list for reuse later. */
1444                 spin_lock_irqsave(&rxq->lock, flags);
1445                 if (rxb->page != NULL) {
1446                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1447                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1448                                 PCI_DMA_FROMDEVICE);
1449                         list_add_tail(&rxb->list, &rxq->rx_free);
1450                         rxq->free_count++;
1451                 } else
1452                         list_add_tail(&rxb->list, &rxq->rx_used);
1453
1454                 spin_unlock_irqrestore(&rxq->lock, flags);
1455
1456                 i = (i + 1) & RX_QUEUE_MASK;
1457                 /* If there are a lot of unused frames,
1458                  * restock the Rx queue so ucode won't assert. */
1459                 if (fill_rx) {
1460                         count++;
1461                         if (count >= 8) {
1462                                 rxq->read = i;
1463                                 iwl3945_rx_replenish_now(priv);
1464                                 count = 0;
1465                         }
1466                 }
1467         }
1468
1469         /* Backtrack one entry */
1470         rxq->read = i;
1471         if (fill_rx)
1472                 iwl3945_rx_replenish_now(priv);
1473         else
1474                 iwl3945_rx_queue_restock(priv);
1475 }
1476
1477 /* call this function to flush any scheduled tasklet */
1478 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1479 {
1480         /* wait to make sure we flush pending tasklet*/
1481         synchronize_irq(priv->pci_dev->irq);
1482         tasklet_kill(&priv->irq_tasklet);
1483 }
1484
1485 #ifdef CONFIG_IWLWIFI_DEBUG
1486 static const char *desc_lookup(int i)
1487 {
1488         switch (i) {
1489         case 1:
1490                 return "FAIL";
1491         case 2:
1492                 return "BAD_PARAM";
1493         case 3:
1494                 return "BAD_CHECKSUM";
1495         case 4:
1496                 return "NMI_INTERRUPT";
1497         case 5:
1498                 return "SYSASSERT";
1499         case 6:
1500                 return "FATAL_ERROR";
1501         }
1502
1503         return "UNKNOWN";
1504 }
1505
1506 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1507 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1508
1509 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1510 {
1511         u32 i;
1512         u32 desc, time, count, base, data1;
1513         u32 blink1, blink2, ilink1, ilink2;
1514
1515         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1516
1517         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1518                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1519                 return;
1520         }
1521
1522
1523         count = iwl_read_targ_mem(priv, base);
1524
1525         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1526                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1527                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1528                         priv->status, count);
1529         }
1530
1531         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1532                   "ilink1  nmiPC   Line\n");
1533         for (i = ERROR_START_OFFSET;
1534              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1535              i += ERROR_ELEM_SIZE) {
1536                 desc = iwl_read_targ_mem(priv, base + i);
1537                 time =
1538                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1539                 blink1 =
1540                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1541                 blink2 =
1542                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1543                 ilink1 =
1544                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1545                 ilink2 =
1546                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1547                 data1 =
1548                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1549
1550                 IWL_ERR(priv,
1551                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1552                         desc_lookup(desc), desc, time, blink1, blink2,
1553                         ilink1, ilink2, data1);
1554                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1555                                         0, blink1, blink2, ilink1, ilink2);
1556         }
1557 }
1558
1559 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1560
1561 /**
1562  * iwl3945_print_event_log - Dump error event log to syslog
1563  *
1564  */
1565 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1566                                 u32 num_events, u32 mode)
1567 {
1568         u32 i;
1569         u32 base;       /* SRAM byte address of event log header */
1570         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1571         u32 ptr;        /* SRAM byte address of log data */
1572         u32 ev, time, data; /* event log data */
1573
1574         if (num_events == 0)
1575                 return;
1576
1577         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1578
1579         if (mode == 0)
1580                 event_size = 2 * sizeof(u32);
1581         else
1582                 event_size = 3 * sizeof(u32);
1583
1584         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1585
1586         /* "time" is actually "data" for mode 0 (no timestamp).
1587          * place event id # at far right for easier visual parsing. */
1588         for (i = 0; i < num_events; i++) {
1589                 ev = iwl_read_targ_mem(priv, ptr);
1590                 ptr += sizeof(u32);
1591                 time = iwl_read_targ_mem(priv, ptr);
1592                 ptr += sizeof(u32);
1593                 if (mode == 0) {
1594                         /* data, ev */
1595                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1596                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1597                 } else {
1598                         data = iwl_read_targ_mem(priv, ptr);
1599                         ptr += sizeof(u32);
1600                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1601                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1602                 }
1603         }
1604 }
1605
1606 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1607 {
1608         u32 base;       /* SRAM byte address of event log header */
1609         u32 capacity;   /* event log capacity in # entries */
1610         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1611         u32 num_wraps;  /* # times uCode wrapped to top of log */
1612         u32 next_entry; /* index of next entry to be written by uCode */
1613         u32 size;       /* # entries that we'll print */
1614
1615         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1616         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1617                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1618                 return;
1619         }
1620
1621         /* event log header */
1622         capacity = iwl_read_targ_mem(priv, base);
1623         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1624         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1625         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1626
1627         size = num_wraps ? capacity : next_entry;
1628
1629         /* bail out if nothing in log */
1630         if (size == 0) {
1631                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1632                 return;
1633         }
1634
1635         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1636                   size, num_wraps);
1637
1638         /* if uCode has wrapped back to top of log, start at the oldest entry,
1639          * i.e the next one that uCode would fill. */
1640         if (num_wraps)
1641                 iwl3945_print_event_log(priv, next_entry,
1642                                     capacity - next_entry, mode);
1643
1644         /* (then/else) start at top of log */
1645         iwl3945_print_event_log(priv, 0, next_entry, mode);
1646
1647 }
1648 #else
1649 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1650 {
1651 }
1652
1653 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1654 {
1655 }
1656
1657 #endif
1658
1659 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1660 {
1661         u32 inta, handled = 0;
1662         u32 inta_fh;
1663         unsigned long flags;
1664 #ifdef CONFIG_IWLWIFI_DEBUG
1665         u32 inta_mask;
1666 #endif
1667
1668         spin_lock_irqsave(&priv->lock, flags);
1669
1670         /* Ack/clear/reset pending uCode interrupts.
1671          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1672          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1673         inta = iwl_read32(priv, CSR_INT);
1674         iwl_write32(priv, CSR_INT, inta);
1675
1676         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1677          * Any new interrupts that happen after this, either while we're
1678          * in this tasklet, or later, will show up in next ISR/tasklet. */
1679         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1680         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1681
1682 #ifdef CONFIG_IWLWIFI_DEBUG
1683         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1684                 /* just for debug */
1685                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1686                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1687                               inta, inta_mask, inta_fh);
1688         }
1689 #endif
1690
1691         spin_unlock_irqrestore(&priv->lock, flags);
1692
1693         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1694          * atomic, make sure that inta covers all the interrupts that
1695          * we've discovered, even if FH interrupt came in just after
1696          * reading CSR_INT. */
1697         if (inta_fh & CSR39_FH_INT_RX_MASK)
1698                 inta |= CSR_INT_BIT_FH_RX;
1699         if (inta_fh & CSR39_FH_INT_TX_MASK)
1700                 inta |= CSR_INT_BIT_FH_TX;
1701
1702         /* Now service all interrupt bits discovered above. */
1703         if (inta & CSR_INT_BIT_HW_ERR) {
1704                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1705
1706                 /* Tell the device to stop sending interrupts */
1707                 iwl_disable_interrupts(priv);
1708
1709                 priv->isr_stats.hw++;
1710                 iwl_irq_handle_error(priv);
1711
1712                 handled |= CSR_INT_BIT_HW_ERR;
1713
1714                 return;
1715         }
1716
1717 #ifdef CONFIG_IWLWIFI_DEBUG
1718         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1719                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1720                 if (inta & CSR_INT_BIT_SCD) {
1721                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1722                                       "the frame/frames.\n");
1723                         priv->isr_stats.sch++;
1724                 }
1725
1726                 /* Alive notification via Rx interrupt will do the real work */
1727                 if (inta & CSR_INT_BIT_ALIVE) {
1728                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1729                         priv->isr_stats.alive++;
1730                 }
1731         }
1732 #endif
1733         /* Safely ignore these bits for debug checks below */
1734         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1735
1736         /* Error detected by uCode */
1737         if (inta & CSR_INT_BIT_SW_ERR) {
1738                 IWL_ERR(priv, "Microcode SW error detected. "
1739                         "Restarting 0x%X.\n", inta);
1740                 priv->isr_stats.sw++;
1741                 priv->isr_stats.sw_err = inta;
1742                 iwl_irq_handle_error(priv);
1743                 handled |= CSR_INT_BIT_SW_ERR;
1744         }
1745
1746         /* uCode wakes up after power-down sleep */
1747         if (inta & CSR_INT_BIT_WAKEUP) {
1748                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1749                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1750                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1751                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1752                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1753                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1754                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1755                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1756
1757                 priv->isr_stats.wakeup++;
1758                 handled |= CSR_INT_BIT_WAKEUP;
1759         }
1760
1761         /* All uCode command responses, including Tx command responses,
1762          * Rx "responses" (frame-received notification), and other
1763          * notifications from uCode come through here*/
1764         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1765                 iwl3945_rx_handle(priv);
1766                 priv->isr_stats.rx++;
1767                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1768         }
1769
1770         if (inta & CSR_INT_BIT_FH_TX) {
1771                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1772                 priv->isr_stats.tx++;
1773
1774                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1775                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1776                                         (FH39_SRVC_CHNL), 0x0);
1777                 handled |= CSR_INT_BIT_FH_TX;
1778         }
1779
1780         if (inta & ~handled) {
1781                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1782                 priv->isr_stats.unhandled++;
1783         }
1784
1785         if (inta & ~priv->inta_mask) {
1786                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1787                          inta & ~priv->inta_mask);
1788                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1789         }
1790
1791         /* Re-enable all interrupts */
1792         /* only Re-enable if disabled by irq */
1793         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1794                 iwl_enable_interrupts(priv);
1795
1796 #ifdef CONFIG_IWLWIFI_DEBUG
1797         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1798                 inta = iwl_read32(priv, CSR_INT);
1799                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1800                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1801                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1802                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1803         }
1804 #endif
1805 }
1806
1807 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1808                                          enum ieee80211_band band,
1809                                      u8 is_active, u8 n_probes,
1810                                      struct iwl3945_scan_channel *scan_ch)
1811 {
1812         struct ieee80211_channel *chan;
1813         const struct ieee80211_supported_band *sband;
1814         const struct iwl_channel_info *ch_info;
1815         u16 passive_dwell = 0;
1816         u16 active_dwell = 0;
1817         int added, i;
1818
1819         sband = iwl_get_hw_mode(priv, band);
1820         if (!sband)
1821                 return 0;
1822
1823         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1824         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1825
1826         if (passive_dwell <= active_dwell)
1827                 passive_dwell = active_dwell + 1;
1828
1829         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1830                 chan = priv->scan_request->channels[i];
1831
1832                 if (chan->band != band)
1833                         continue;
1834
1835                 scan_ch->channel = chan->hw_value;
1836
1837                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1838                 if (!is_channel_valid(ch_info)) {
1839                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1840                                        scan_ch->channel);
1841                         continue;
1842                 }
1843
1844                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1845                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1846                 /* If passive , set up for auto-switch
1847                  *  and use long active_dwell time.
1848                  */
1849                 if (!is_active || is_channel_passive(ch_info) ||
1850                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1851                         scan_ch->type = 0;      /* passive */
1852                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1853                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1854                 } else {
1855                         scan_ch->type = 1;      /* active */
1856                 }
1857
1858                 /* Set direct probe bits. These may be used both for active
1859                  * scan channels (probes gets sent right away),
1860                  * or for passive channels (probes get se sent only after
1861                  * hearing clear Rx packet).*/
1862                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1863                         if (n_probes)
1864                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1865                 } else {
1866                         /* uCode v1 does not allow setting direct probe bits on
1867                          * passive channel. */
1868                         if ((scan_ch->type & 1) && n_probes)
1869                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1870                 }
1871
1872                 /* Set txpower levels to defaults */
1873                 scan_ch->tpc.dsp_atten = 110;
1874                 /* scan_pwr_info->tpc.dsp_atten; */
1875
1876                 /*scan_pwr_info->tpc.tx_gain; */
1877                 if (band == IEEE80211_BAND_5GHZ)
1878                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1879                 else {
1880                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1881                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1882                          * power level:
1883                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1884                          */
1885                 }
1886
1887                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1888                                scan_ch->channel,
1889                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1890                                (scan_ch->type & 1) ?
1891                                active_dwell : passive_dwell);
1892
1893                 scan_ch++;
1894                 added++;
1895         }
1896
1897         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1898         return added;
1899 }
1900
1901 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1902                               struct ieee80211_rate *rates)
1903 {
1904         int i;
1905
1906         for (i = 0; i < IWL_RATE_COUNT; i++) {
1907                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1908                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1909                 rates[i].hw_value_short = i;
1910                 rates[i].flags = 0;
1911                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1912                         /*
1913                          * If CCK != 1M then set short preamble rate flag.
1914                          */
1915                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1916                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1917                 }
1918         }
1919 }
1920
1921 /******************************************************************************
1922  *
1923  * uCode download functions
1924  *
1925  ******************************************************************************/
1926
1927 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1928 {
1929         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1930         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1931         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1932         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1933         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1934         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1935 }
1936
1937 /**
1938  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1939  *     looking at all data.
1940  */
1941 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1942 {
1943         u32 val;
1944         u32 save_len = len;
1945         int rc = 0;
1946         u32 errcnt;
1947
1948         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1949
1950         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1951                                IWL39_RTC_INST_LOWER_BOUND);
1952
1953         errcnt = 0;
1954         for (; len > 0; len -= sizeof(u32), image++) {
1955                 /* read data comes through single port, auto-incr addr */
1956                 /* NOTE: Use the debugless read so we don't flood kernel log
1957                  * if IWL_DL_IO is set */
1958                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1959                 if (val != le32_to_cpu(*image)) {
1960                         IWL_ERR(priv, "uCode INST section is invalid at "
1961                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1962                                   save_len - len, val, le32_to_cpu(*image));
1963                         rc = -EIO;
1964                         errcnt++;
1965                         if (errcnt >= 20)
1966                                 break;
1967                 }
1968         }
1969
1970
1971         if (!errcnt)
1972                 IWL_DEBUG_INFO(priv,
1973                         "ucode image in INSTRUCTION memory is good\n");
1974
1975         return rc;
1976 }
1977
1978
1979 /**
1980  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1981  *   using sample data 100 bytes apart.  If these sample points are good,
1982  *   it's a pretty good bet that everything between them is good, too.
1983  */
1984 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1985 {
1986         u32 val;
1987         int rc = 0;
1988         u32 errcnt = 0;
1989         u32 i;
1990
1991         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1992
1993         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1994                 /* read data comes through single port, auto-incr addr */
1995                 /* NOTE: Use the debugless read so we don't flood kernel log
1996                  * if IWL_DL_IO is set */
1997                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1998                         i + IWL39_RTC_INST_LOWER_BOUND);
1999                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2000                 if (val != le32_to_cpu(*image)) {
2001 #if 0 /* Enable this if you want to see details */
2002                         IWL_ERR(priv, "uCode INST section is invalid at "
2003                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2004                                   i, val, *image);
2005 #endif
2006                         rc = -EIO;
2007                         errcnt++;
2008                         if (errcnt >= 3)
2009                                 break;
2010                 }
2011         }
2012
2013         return rc;
2014 }
2015
2016
2017 /**
2018  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2019  *    and verify its contents
2020  */
2021 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2022 {
2023         __le32 *image;
2024         u32 len;
2025         int rc = 0;
2026
2027         /* Try bootstrap */
2028         image = (__le32 *)priv->ucode_boot.v_addr;
2029         len = priv->ucode_boot.len;
2030         rc = iwl3945_verify_inst_sparse(priv, image, len);
2031         if (rc == 0) {
2032                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2033                 return 0;
2034         }
2035
2036         /* Try initialize */
2037         image = (__le32 *)priv->ucode_init.v_addr;
2038         len = priv->ucode_init.len;
2039         rc = iwl3945_verify_inst_sparse(priv, image, len);
2040         if (rc == 0) {
2041                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2042                 return 0;
2043         }
2044
2045         /* Try runtime/protocol */
2046         image = (__le32 *)priv->ucode_code.v_addr;
2047         len = priv->ucode_code.len;
2048         rc = iwl3945_verify_inst_sparse(priv, image, len);
2049         if (rc == 0) {
2050                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2051                 return 0;
2052         }
2053
2054         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2055
2056         /* Since nothing seems to match, show first several data entries in
2057          * instruction SRAM, so maybe visual inspection will give a clue.
2058          * Selection of bootstrap image (vs. other images) is arbitrary. */
2059         image = (__le32 *)priv->ucode_boot.v_addr;
2060         len = priv->ucode_boot.len;
2061         rc = iwl3945_verify_inst_full(priv, image, len);
2062
2063         return rc;
2064 }
2065
2066 static void iwl3945_nic_start(struct iwl_priv *priv)
2067 {
2068         /* Remove all resets to allow NIC to operate */
2069         iwl_write32(priv, CSR_RESET, 0);
2070 }
2071
2072 /**
2073  * iwl3945_read_ucode - Read uCode images from disk file.
2074  *
2075  * Copy into buffers for card to fetch via bus-mastering
2076  */
2077 static int iwl3945_read_ucode(struct iwl_priv *priv)
2078 {
2079         const struct iwl_ucode_header *ucode;
2080         int ret = -EINVAL, index;
2081         const struct firmware *ucode_raw;
2082         /* firmware file name contains uCode/driver compatibility version */
2083         const char *name_pre = priv->cfg->fw_name_pre;
2084         const unsigned int api_max = priv->cfg->ucode_api_max;
2085         const unsigned int api_min = priv->cfg->ucode_api_min;
2086         char buf[25];
2087         u8 *src;
2088         size_t len;
2089         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2090
2091         /* Ask kernel firmware_class module to get the boot firmware off disk.
2092          * request_firmware() is synchronous, file is in memory on return. */
2093         for (index = api_max; index >= api_min; index--) {
2094                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2095                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2096                 if (ret < 0) {
2097                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2098                                   buf, ret);
2099                         if (ret == -ENOENT)
2100                                 continue;
2101                         else
2102                                 goto error;
2103                 } else {
2104                         if (index < api_max)
2105                                 IWL_ERR(priv, "Loaded firmware %s, "
2106                                         "which is deprecated. "
2107                                         " Please use API v%u instead.\n",
2108                                           buf, api_max);
2109                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2110                                        "(%zd bytes) from disk\n",
2111                                        buf, ucode_raw->size);
2112                         break;
2113                 }
2114         }
2115
2116         if (ret < 0)
2117                 goto error;
2118
2119         /* Make sure that we got at least our header! */
2120         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2121                 IWL_ERR(priv, "File size way too small!\n");
2122                 ret = -EINVAL;
2123                 goto err_release;
2124         }
2125
2126         /* Data from ucode file:  header followed by uCode images */
2127         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2128
2129         priv->ucode_ver = le32_to_cpu(ucode->ver);
2130         api_ver = IWL_UCODE_API(priv->ucode_ver);
2131         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2132         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2133         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2134         init_data_size =
2135                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2136         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2137         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2138
2139         /* api_ver should match the api version forming part of the
2140          * firmware filename ... but we don't check for that and only rely
2141          * on the API version read from firmware header from here on forward */
2142
2143         if (api_ver < api_min || api_ver > api_max) {
2144                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2145                           "Driver supports v%u, firmware is v%u.\n",
2146                           api_max, api_ver);
2147                 priv->ucode_ver = 0;
2148                 ret = -EINVAL;
2149                 goto err_release;
2150         }
2151         if (api_ver != api_max)
2152                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2153                           "got %u. New firmware can be obtained "
2154                           "from http://www.intellinuxwireless.org.\n",
2155                           api_max, api_ver);
2156
2157         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2158                 IWL_UCODE_MAJOR(priv->ucode_ver),
2159                 IWL_UCODE_MINOR(priv->ucode_ver),
2160                 IWL_UCODE_API(priv->ucode_ver),
2161                 IWL_UCODE_SERIAL(priv->ucode_ver));
2162
2163         snprintf(priv->hw->wiphy->fw_version,
2164                  sizeof(priv->hw->wiphy->fw_version),
2165                  "%u.%u.%u.%u",
2166                  IWL_UCODE_MAJOR(priv->ucode_ver),
2167                  IWL_UCODE_MINOR(priv->ucode_ver),
2168                  IWL_UCODE_API(priv->ucode_ver),
2169                  IWL_UCODE_SERIAL(priv->ucode_ver));
2170
2171         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2172                        priv->ucode_ver);
2173         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2174                        inst_size);
2175         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2176                        data_size);
2177         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2178                        init_size);
2179         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2180                        init_data_size);
2181         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2182                        boot_size);
2183
2184
2185         /* Verify size of file vs. image size info in file's header */
2186         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2187                 inst_size + data_size + init_size +
2188                 init_data_size + boot_size) {
2189
2190                 IWL_DEBUG_INFO(priv,
2191                         "uCode file size %zd does not match expected size\n",
2192                         ucode_raw->size);
2193                 ret = -EINVAL;
2194                 goto err_release;
2195         }
2196
2197         /* Verify that uCode images will fit in card's SRAM */
2198         if (inst_size > IWL39_MAX_INST_SIZE) {
2199                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2200                                inst_size);
2201                 ret = -EINVAL;
2202                 goto err_release;
2203         }
2204
2205         if (data_size > IWL39_MAX_DATA_SIZE) {
2206                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2207                                data_size);
2208                 ret = -EINVAL;
2209                 goto err_release;
2210         }
2211         if (init_size > IWL39_MAX_INST_SIZE) {
2212                 IWL_DEBUG_INFO(priv,
2213                                 "uCode init instr len %d too large to fit in\n",
2214                                 init_size);
2215                 ret = -EINVAL;
2216                 goto err_release;
2217         }
2218         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2219                 IWL_DEBUG_INFO(priv,
2220                                 "uCode init data len %d too large to fit in\n",
2221                                 init_data_size);
2222                 ret = -EINVAL;
2223                 goto err_release;
2224         }
2225         if (boot_size > IWL39_MAX_BSM_SIZE) {
2226                 IWL_DEBUG_INFO(priv,
2227                                 "uCode boot instr len %d too large to fit in\n",
2228                                 boot_size);
2229                 ret = -EINVAL;
2230                 goto err_release;
2231         }
2232
2233         /* Allocate ucode buffers for card's bus-master loading ... */
2234
2235         /* Runtime instructions and 2 copies of data:
2236          * 1) unmodified from disk
2237          * 2) backup cache for save/restore during power-downs */
2238         priv->ucode_code.len = inst_size;
2239         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2240
2241         priv->ucode_data.len = data_size;
2242         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2243
2244         priv->ucode_data_backup.len = data_size;
2245         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2246
2247         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2248             !priv->ucode_data_backup.v_addr)
2249                 goto err_pci_alloc;
2250
2251         /* Initialization instructions and data */
2252         if (init_size && init_data_size) {
2253                 priv->ucode_init.len = init_size;
2254                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2255
2256                 priv->ucode_init_data.len = init_data_size;
2257                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2258
2259                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2260                         goto err_pci_alloc;
2261         }
2262
2263         /* Bootstrap (instructions only, no data) */
2264         if (boot_size) {
2265                 priv->ucode_boot.len = boot_size;
2266                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2267
2268                 if (!priv->ucode_boot.v_addr)
2269                         goto err_pci_alloc;
2270         }
2271
2272         /* Copy images into buffers for card's bus-master reads ... */
2273
2274         /* Runtime instructions (first block of data in file) */
2275         len = inst_size;
2276         IWL_DEBUG_INFO(priv,
2277                 "Copying (but not loading) uCode instr len %zd\n", len);
2278         memcpy(priv->ucode_code.v_addr, src, len);
2279         src += len;
2280
2281         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2282                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2283
2284         /* Runtime data (2nd block)
2285          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2286         len = data_size;
2287         IWL_DEBUG_INFO(priv,
2288                 "Copying (but not loading) uCode data len %zd\n", len);
2289         memcpy(priv->ucode_data.v_addr, src, len);
2290         memcpy(priv->ucode_data_backup.v_addr, src, len);
2291         src += len;
2292
2293         /* Initialization instructions (3rd block) */
2294         if (init_size) {
2295                 len = init_size;
2296                 IWL_DEBUG_INFO(priv,
2297                         "Copying (but not loading) init instr len %zd\n", len);
2298                 memcpy(priv->ucode_init.v_addr, src, len);
2299                 src += len;
2300         }
2301
2302         /* Initialization data (4th block) */
2303         if (init_data_size) {
2304                 len = init_data_size;
2305                 IWL_DEBUG_INFO(priv,
2306                         "Copying (but not loading) init data len %zd\n", len);
2307                 memcpy(priv->ucode_init_data.v_addr, src, len);
2308                 src += len;
2309         }
2310
2311         /* Bootstrap instructions (5th block) */
2312         len = boot_size;
2313         IWL_DEBUG_INFO(priv,
2314                 "Copying (but not loading) boot instr len %zd\n", len);
2315         memcpy(priv->ucode_boot.v_addr, src, len);
2316
2317         /* We have our copies now, allow OS release its copies */
2318         release_firmware(ucode_raw);
2319         return 0;
2320
2321  err_pci_alloc:
2322         IWL_ERR(priv, "failed to allocate pci memory\n");
2323         ret = -ENOMEM;
2324         iwl3945_dealloc_ucode_pci(priv);
2325
2326  err_release:
2327         release_firmware(ucode_raw);
2328
2329  error:
2330         return ret;
2331 }
2332
2333
2334 /**
2335  * iwl3945_set_ucode_ptrs - Set uCode address location
2336  *
2337  * Tell initialization uCode where to find runtime uCode.
2338  *
2339  * BSM registers initially contain pointers to initialization uCode.
2340  * We need to replace them to load runtime uCode inst and data,
2341  * and to save runtime data when powering down.
2342  */
2343 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2344 {
2345         dma_addr_t pinst;
2346         dma_addr_t pdata;
2347
2348         /* bits 31:0 for 3945 */
2349         pinst = priv->ucode_code.p_addr;
2350         pdata = priv->ucode_data_backup.p_addr;
2351
2352         /* Tell bootstrap uCode where to find image to load */
2353         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2354         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2355         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2356                                  priv->ucode_data.len);
2357
2358         /* Inst byte count must be last to set up, bit 31 signals uCode
2359          *   that all new ptr/size info is in place */
2360         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2361                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2362
2363         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2364
2365         return 0;
2366 }
2367
2368 /**
2369  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2370  *
2371  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2372  *
2373  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2374  */
2375 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2376 {
2377         /* Check alive response for "valid" sign from uCode */
2378         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2379                 /* We had an error bringing up the hardware, so take it
2380                  * all the way back down so we can try again */
2381                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2382                 goto restart;
2383         }
2384
2385         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2386          * This is a paranoid check, because we would not have gotten the
2387          * "initialize" alive if code weren't properly loaded.  */
2388         if (iwl3945_verify_ucode(priv)) {
2389                 /* Runtime instruction load was bad;
2390                  * take it all the way back down so we can try again */
2391                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2392                 goto restart;
2393         }
2394
2395         /* Send pointers to protocol/runtime uCode image ... init code will
2396          * load and launch runtime uCode, which will send us another "Alive"
2397          * notification. */
2398         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2399         if (iwl3945_set_ucode_ptrs(priv)) {
2400                 /* Runtime instruction load won't happen;
2401                  * take it all the way back down so we can try again */
2402                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2403                 goto restart;
2404         }
2405         return;
2406
2407  restart:
2408         queue_work(priv->workqueue, &priv->restart);
2409 }
2410
2411 /**
2412  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2413  *                   from protocol/runtime uCode (initialization uCode's
2414  *                   Alive gets handled by iwl3945_init_alive_start()).
2415  */
2416 static void iwl3945_alive_start(struct iwl_priv *priv)
2417 {
2418         int thermal_spin = 0;
2419         u32 rfkill;
2420
2421         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2422
2423         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2424                 /* We had an error bringing up the hardware, so take it
2425                  * all the way back down so we can try again */
2426                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2427                 goto restart;
2428         }
2429
2430         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2431          * This is a paranoid check, because we would not have gotten the
2432          * "runtime" alive if code weren't properly loaded.  */
2433         if (iwl3945_verify_ucode(priv)) {
2434                 /* Runtime instruction load was bad;
2435                  * take it all the way back down so we can try again */
2436                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2437                 goto restart;
2438         }
2439
2440         iwl_clear_stations_table(priv);
2441
2442         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2443         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2444
2445         if (rfkill & 0x1) {
2446                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2447                 /* if RFKILL is not on, then wait for thermal
2448                  * sensor in adapter to kick in */
2449                 while (iwl3945_hw_get_temperature(priv) == 0) {
2450                         thermal_spin++;
2451                         udelay(10);
2452                 }
2453
2454                 if (thermal_spin)
2455                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2456                                        thermal_spin * 10);
2457         } else
2458                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2459
2460         /* After the ALIVE response, we can send commands to 3945 uCode */
2461         set_bit(STATUS_ALIVE, &priv->status);
2462
2463         if (iwl_is_rfkill(priv))
2464                 return;
2465
2466         ieee80211_wake_queues(priv->hw);
2467
2468         priv->active_rate = priv->rates_mask;
2469         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2470
2471         iwl_power_update_mode(priv, false);
2472
2473         if (iwl_is_associated(priv)) {
2474                 struct iwl3945_rxon_cmd *active_rxon =
2475                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2476
2477                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2478                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2479         } else {
2480                 /* Initialize our rx_config data */
2481                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2482         }
2483
2484         /* Configure Bluetooth device coexistence support */
2485         iwl_send_bt_config(priv);
2486
2487         /* Configure the adapter for unassociated operation */
2488         iwlcore_commit_rxon(priv);
2489
2490         iwl3945_reg_txpower_periodic(priv);
2491
2492         iwl_leds_init(priv);
2493
2494         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2495         set_bit(STATUS_READY, &priv->status);
2496         wake_up_interruptible(&priv->wait_command_queue);
2497
2498         /* reassociate for ADHOC mode */
2499         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2500                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2501                                                                 priv->vif);
2502                 if (beacon)
2503                         iwl_mac_beacon_update(priv->hw, beacon);
2504         }
2505
2506         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2507                 iwl_set_mode(priv, priv->iw_mode);
2508
2509         return;
2510
2511  restart:
2512         queue_work(priv->workqueue, &priv->restart);
2513 }
2514
2515 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2516
2517 static void __iwl3945_down(struct iwl_priv *priv)
2518 {
2519         unsigned long flags;
2520         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2521         struct ieee80211_conf *conf = NULL;
2522
2523         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2524
2525         conf = ieee80211_get_hw_conf(priv->hw);
2526
2527         if (!exit_pending)
2528                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2529
2530         iwl_clear_stations_table(priv);
2531
2532         /* Unblock any waiting calls */
2533         wake_up_interruptible_all(&priv->wait_command_queue);
2534
2535         /* Wipe out the EXIT_PENDING status bit if we are not actually
2536          * exiting the module */
2537         if (!exit_pending)
2538                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2539
2540         /* stop and reset the on-board processor */
2541         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2542
2543         /* tell the device to stop sending interrupts */
2544         spin_lock_irqsave(&priv->lock, flags);
2545         iwl_disable_interrupts(priv);
2546         spin_unlock_irqrestore(&priv->lock, flags);
2547         iwl_synchronize_irq(priv);
2548
2549         if (priv->mac80211_registered)
2550                 ieee80211_stop_queues(priv->hw);
2551
2552         /* If we have not previously called iwl3945_init() then
2553          * clear all bits but the RF Kill bits and return */
2554         if (!iwl_is_init(priv)) {
2555                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2556                                         STATUS_RF_KILL_HW |
2557                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2558                                         STATUS_GEO_CONFIGURED |
2559                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2560                                         STATUS_EXIT_PENDING;
2561                 goto exit;
2562         }
2563
2564         /* ...otherwise clear out all the status bits but the RF Kill
2565          * bit and continue taking the NIC down. */
2566         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2567                                 STATUS_RF_KILL_HW |
2568                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2569                                 STATUS_GEO_CONFIGURED |
2570                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2571                                 STATUS_FW_ERROR |
2572                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2573                                 STATUS_EXIT_PENDING;
2574
2575         iwl3945_hw_txq_ctx_stop(priv);
2576         iwl3945_hw_rxq_stop(priv);
2577
2578         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2579                                 APMG_CLK_VAL_DMA_CLK_RQT);
2580
2581         udelay(5);
2582
2583         /* Stop the device, and put it in low power state */
2584         priv->cfg->ops->lib->apm_ops.stop(priv);
2585
2586  exit:
2587         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2588
2589         if (priv->ibss_beacon)
2590                 dev_kfree_skb(priv->ibss_beacon);
2591         priv->ibss_beacon = NULL;
2592
2593         /* clear out any free frames */
2594         iwl3945_clear_free_frames(priv);
2595 }
2596
2597 static void iwl3945_down(struct iwl_priv *priv)
2598 {
2599         mutex_lock(&priv->mutex);
2600         __iwl3945_down(priv);
2601         mutex_unlock(&priv->mutex);
2602
2603         iwl3945_cancel_deferred_work(priv);
2604 }
2605
2606 #define MAX_HW_RESTARTS 5
2607
2608 static int __iwl3945_up(struct iwl_priv *priv)
2609 {
2610         int rc, i;
2611
2612         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2613                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2614                 return -EIO;
2615         }
2616
2617         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2618                 IWL_ERR(priv, "ucode not available for device bring up\n");
2619                 return -EIO;
2620         }
2621
2622         /* If platform's RF_KILL switch is NOT set to KILL */
2623         if (iwl_read32(priv, CSR_GP_CNTRL) &
2624                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2625                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2626         else {
2627                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2628                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2629                 return -ENODEV;
2630         }
2631
2632         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2633
2634         rc = iwl3945_hw_nic_init(priv);
2635         if (rc) {
2636                 IWL_ERR(priv, "Unable to int nic\n");
2637                 return rc;
2638         }
2639
2640         /* make sure rfkill handshake bits are cleared */
2641         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2642         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2643                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2644
2645         /* clear (again), then enable host interrupts */
2646         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2647         iwl_enable_interrupts(priv);
2648
2649         /* really make sure rfkill handshake bits are cleared */
2650         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2651         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2652
2653         /* Copy original ucode data image from disk into backup cache.
2654          * This will be used to initialize the on-board processor's
2655          * data SRAM for a clean start when the runtime program first loads. */
2656         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2657                priv->ucode_data.len);
2658
2659         /* We return success when we resume from suspend and rf_kill is on. */
2660         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2661                 return 0;
2662
2663         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2664
2665                 iwl_clear_stations_table(priv);
2666
2667                 /* load bootstrap state machine,
2668                  * load bootstrap program into processor's memory,
2669                  * prepare to load the "initialize" uCode */
2670                 priv->cfg->ops->lib->load_ucode(priv);
2671
2672                 if (rc) {
2673                         IWL_ERR(priv,
2674                                 "Unable to set up bootstrap uCode: %d\n", rc);
2675                         continue;
2676                 }
2677
2678                 /* start card; "initialize" will load runtime ucode */
2679                 iwl3945_nic_start(priv);
2680
2681                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2682
2683                 return 0;
2684         }
2685
2686         set_bit(STATUS_EXIT_PENDING, &priv->status);
2687         __iwl3945_down(priv);
2688         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2689
2690         /* tried to restart and config the device for as long as our
2691          * patience could withstand */
2692         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2693         return -EIO;
2694 }
2695
2696
2697 /*****************************************************************************
2698  *
2699  * Workqueue callbacks
2700  *
2701  *****************************************************************************/
2702
2703 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2704 {
2705         struct iwl_priv *priv =
2706             container_of(data, struct iwl_priv, init_alive_start.work);
2707
2708         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2709                 return;
2710
2711         mutex_lock(&priv->mutex);
2712         iwl3945_init_alive_start(priv);
2713         mutex_unlock(&priv->mutex);
2714 }
2715
2716 static void iwl3945_bg_alive_start(struct work_struct *data)
2717 {
2718         struct iwl_priv *priv =
2719             container_of(data, struct iwl_priv, alive_start.work);
2720
2721         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2722                 return;
2723
2724         mutex_lock(&priv->mutex);
2725         iwl3945_alive_start(priv);
2726         mutex_unlock(&priv->mutex);
2727 }
2728
2729 /*
2730  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2731  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2732  * *is* readable even when device has been SW_RESET into low power mode
2733  * (e.g. during RF KILL).
2734  */
2735 static void iwl3945_rfkill_poll(struct work_struct *data)
2736 {
2737         struct iwl_priv *priv =
2738             container_of(data, struct iwl_priv, rfkill_poll.work);
2739         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2740         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2741                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2742
2743         if (new_rfkill != old_rfkill) {
2744                 if (new_rfkill)
2745                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2746                 else
2747                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2748
2749                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2750
2751                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2752                                 new_rfkill ? "disable radio" : "enable radio");
2753         }
2754
2755         /* Keep this running, even if radio now enabled.  This will be
2756          * cancelled in mac_start() if system decides to start again */
2757         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2758                            round_jiffies_relative(2 * HZ));
2759
2760 }
2761
2762 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2763 static void iwl3945_bg_request_scan(struct work_struct *data)
2764 {
2765         struct iwl_priv *priv =
2766             container_of(data, struct iwl_priv, request_scan);
2767         struct iwl_host_cmd cmd = {
2768                 .id = REPLY_SCAN_CMD,
2769                 .len = sizeof(struct iwl3945_scan_cmd),
2770                 .flags = CMD_SIZE_HUGE,
2771         };
2772         int rc = 0;
2773         struct iwl3945_scan_cmd *scan;
2774         struct ieee80211_conf *conf = NULL;
2775         u8 n_probes = 0;
2776         enum ieee80211_band band;
2777         bool is_active = false;
2778
2779         conf = ieee80211_get_hw_conf(priv->hw);
2780
2781         mutex_lock(&priv->mutex);
2782
2783         cancel_delayed_work(&priv->scan_check);
2784
2785         if (!iwl_is_ready(priv)) {
2786                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2787                 goto done;
2788         }
2789
2790         /* Make sure the scan wasn't canceled before this queued work
2791          * was given the chance to run... */
2792         if (!test_bit(STATUS_SCANNING, &priv->status))
2793                 goto done;
2794
2795         /* This should never be called or scheduled if there is currently
2796          * a scan active in the hardware. */
2797         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2798                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2799                                 "Ignoring second request.\n");
2800                 rc = -EIO;
2801                 goto done;
2802         }
2803
2804         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2805                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2806                 goto done;
2807         }
2808
2809         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2810                 IWL_DEBUG_HC(priv,
2811                         "Scan request while abort pending. Queuing.\n");
2812                 goto done;
2813         }
2814
2815         if (iwl_is_rfkill(priv)) {
2816                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2817                 goto done;
2818         }
2819
2820         if (!test_bit(STATUS_READY, &priv->status)) {
2821                 IWL_DEBUG_HC(priv,
2822                         "Scan request while uninitialized. Queuing.\n");
2823                 goto done;
2824         }
2825
2826         if (!priv->scan_bands) {
2827                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2828                 goto done;
2829         }
2830
2831         if (!priv->scan) {
2832                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2833                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2834                 if (!priv->scan) {
2835                         rc = -ENOMEM;
2836                         goto done;
2837                 }
2838         }
2839         scan = priv->scan;
2840         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2841
2842         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2843         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2844
2845         if (iwl_is_associated(priv)) {
2846                 u16 interval = 0;
2847                 u32 extra;
2848                 u32 suspend_time = 100;
2849                 u32 scan_suspend_time = 100;
2850                 unsigned long flags;
2851
2852                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2853
2854                 spin_lock_irqsave(&priv->lock, flags);
2855                 interval = priv->beacon_int;
2856                 spin_unlock_irqrestore(&priv->lock, flags);
2857
2858                 scan->suspend_time = 0;
2859                 scan->max_out_time = cpu_to_le32(200 * 1024);
2860                 if (!interval)
2861                         interval = suspend_time;
2862                 /*
2863                  * suspend time format:
2864                  *  0-19: beacon interval in usec (time before exec.)
2865                  * 20-23: 0
2866                  * 24-31: number of beacons (suspend between channels)
2867                  */
2868
2869                 extra = (suspend_time / interval) << 24;
2870                 scan_suspend_time = 0xFF0FFFFF &
2871                     (extra | ((suspend_time % interval) * 1024));
2872
2873                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2874                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2875                                scan_suspend_time, interval);
2876         }
2877
2878         if (priv->scan_request->n_ssids) {
2879                 int i, p = 0;
2880                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2881                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2882                         /* always does wildcard anyway */
2883                         if (!priv->scan_request->ssids[i].ssid_len)
2884                                 continue;
2885                         scan->direct_scan[p].id = WLAN_EID_SSID;
2886                         scan->direct_scan[p].len =
2887                                 priv->scan_request->ssids[i].ssid_len;
2888                         memcpy(scan->direct_scan[p].ssid,
2889                                priv->scan_request->ssids[i].ssid,
2890                                priv->scan_request->ssids[i].ssid_len);
2891                         n_probes++;
2892                         p++;
2893                 }
2894                 is_active = true;
2895         } else
2896                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2897
2898         /* We don't build a direct scan probe request; the uCode will do
2899          * that based on the direct_mask added to each channel entry */
2900         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2901         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2902         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2903
2904         /* flags + rate selection */
2905
2906         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2907                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2908                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2909                 scan->good_CRC_th = 0;
2910                 band = IEEE80211_BAND_2GHZ;
2911         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2912                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2913                 /*
2914                  * If active scaning is requested but a certain channel
2915                  * is marked passive, we can do active scanning if we
2916                  * detect transmissions.
2917                  */
2918                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2919                 band = IEEE80211_BAND_5GHZ;
2920         } else {
2921                 IWL_WARN(priv, "Invalid scan band count\n");
2922                 goto done;
2923         }
2924
2925         scan->tx_cmd.len = cpu_to_le16(
2926                         iwl_fill_probe_req(priv,
2927                                 (struct ieee80211_mgmt *)scan->data,
2928                                 priv->scan_request->ie,
2929                                 priv->scan_request->ie_len,
2930                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2931
2932         /* select Rx antennas */
2933         scan->flags |= iwl3945_get_antenna_flags(priv);
2934
2935         if (iwl_is_monitor_mode(priv))
2936                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2937
2938         scan->channel_count =
2939                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2940                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2941
2942         if (scan->channel_count == 0) {
2943                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2944                 goto done;
2945         }
2946
2947         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2948             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2949         cmd.data = scan;
2950         scan->len = cpu_to_le16(cmd.len);
2951
2952         set_bit(STATUS_SCAN_HW, &priv->status);
2953         rc = iwl_send_cmd_sync(priv, &cmd);
2954         if (rc)
2955                 goto done;
2956
2957         queue_delayed_work(priv->workqueue, &priv->scan_check,
2958                            IWL_SCAN_CHECK_WATCHDOG);
2959
2960         mutex_unlock(&priv->mutex);
2961         return;
2962
2963  done:
2964         /* can not perform scan make sure we clear scanning
2965          * bits from status so next scan request can be performed.
2966          * if we dont clear scanning status bit here all next scan
2967          * will fail
2968         */
2969         clear_bit(STATUS_SCAN_HW, &priv->status);
2970         clear_bit(STATUS_SCANNING, &priv->status);
2971
2972         /* inform mac80211 scan aborted */
2973         queue_work(priv->workqueue, &priv->scan_completed);
2974         mutex_unlock(&priv->mutex);
2975 }
2976
2977 static void iwl3945_bg_up(struct work_struct *data)
2978 {
2979         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2980
2981         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2982                 return;
2983
2984         mutex_lock(&priv->mutex);
2985         __iwl3945_up(priv);
2986         mutex_unlock(&priv->mutex);
2987 }
2988
2989 static void iwl3945_bg_restart(struct work_struct *data)
2990 {
2991         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2992
2993         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2994                 return;
2995
2996         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2997                 mutex_lock(&priv->mutex);
2998                 priv->vif = NULL;
2999                 priv->is_open = 0;
3000                 mutex_unlock(&priv->mutex);
3001                 iwl3945_down(priv);
3002                 ieee80211_restart_hw(priv->hw);
3003         } else {
3004                 iwl3945_down(priv);
3005                 queue_work(priv->workqueue, &priv->up);
3006         }
3007 }
3008
3009 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3010 {
3011         struct iwl_priv *priv =
3012             container_of(data, struct iwl_priv, rx_replenish);
3013
3014         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3015                 return;
3016
3017         mutex_lock(&priv->mutex);
3018         iwl3945_rx_replenish(priv);
3019         mutex_unlock(&priv->mutex);
3020 }
3021
3022 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3023
3024 void iwl3945_post_associate(struct iwl_priv *priv)
3025 {
3026         int rc = 0;
3027         struct ieee80211_conf *conf = NULL;
3028
3029         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3030                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3031                 return;
3032         }
3033
3034
3035         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3036                         priv->assoc_id, priv->active_rxon.bssid_addr);
3037
3038         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3039                 return;
3040
3041         if (!priv->vif || !priv->is_open)
3042                 return;
3043
3044         iwl_scan_cancel_timeout(priv, 200);
3045
3046         conf = ieee80211_get_hw_conf(priv->hw);
3047
3048         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3049         iwlcore_commit_rxon(priv);
3050
3051         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3052         iwl_setup_rxon_timing(priv);
3053         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3054                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3055         if (rc)
3056                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3057                             "Attempting to continue.\n");
3058
3059         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3060
3061         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3062
3063         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3064                         priv->assoc_id, priv->beacon_int);
3065
3066         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3067                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3068         else
3069                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3070
3071         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3072                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3073                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3074                 else
3075                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3076
3077                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3078                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3079
3080         }
3081
3082         iwlcore_commit_rxon(priv);
3083
3084         switch (priv->iw_mode) {
3085         case NL80211_IFTYPE_STATION:
3086                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3087                 break;
3088
3089         case NL80211_IFTYPE_ADHOC:
3090
3091                 priv->assoc_id = 1;
3092                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3093                 iwl3945_sync_sta(priv, IWL_STA_ID,
3094                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3095                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3096                                  CMD_ASYNC);
3097                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3098                 iwl3945_send_beacon_cmd(priv);
3099
3100                 break;
3101
3102         default:
3103                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3104                            __func__, priv->iw_mode);
3105                 break;
3106         }
3107
3108         iwl_activate_qos(priv, 0);
3109
3110         /* we have just associated, don't start scan too early */
3111         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3112 }
3113
3114 /*****************************************************************************
3115  *
3116  * mac80211 entry point functions
3117  *
3118  *****************************************************************************/
3119
3120 #define UCODE_READY_TIMEOUT     (2 * HZ)
3121
3122 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3123 {
3124         struct iwl_priv *priv = hw->priv;
3125         int ret;
3126
3127         IWL_DEBUG_MAC80211(priv, "enter\n");
3128
3129         /* we should be verifying the device is ready to be opened */
3130         mutex_lock(&priv->mutex);
3131
3132         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3133          * ucode filename and max sizes are card-specific. */
3134
3135         if (!priv->ucode_code.len) {
3136                 ret = iwl3945_read_ucode(priv);
3137                 if (ret) {
3138                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3139                         mutex_unlock(&priv->mutex);
3140                         goto out_release_irq;
3141                 }
3142         }
3143
3144         ret = __iwl3945_up(priv);
3145
3146         mutex_unlock(&priv->mutex);
3147
3148         if (ret)
3149                 goto out_release_irq;
3150
3151         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3152
3153         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3154          * mac80211 will not be run successfully. */
3155         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3156                         test_bit(STATUS_READY, &priv->status),
3157                         UCODE_READY_TIMEOUT);
3158         if (!ret) {
3159                 if (!test_bit(STATUS_READY, &priv->status)) {
3160                         IWL_ERR(priv,
3161                                 "Wait for START_ALIVE timeout after %dms.\n",
3162                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3163                         ret = -ETIMEDOUT;
3164                         goto out_release_irq;
3165                 }
3166         }
3167
3168         /* ucode is running and will send rfkill notifications,
3169          * no need to poll the killswitch state anymore */
3170         cancel_delayed_work(&priv->rfkill_poll);
3171
3172         iwl_led_start(priv);
3173
3174         priv->is_open = 1;
3175         IWL_DEBUG_MAC80211(priv, "leave\n");
3176         return 0;
3177
3178 out_release_irq:
3179         priv->is_open = 0;
3180         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3181         return ret;
3182 }
3183
3184 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3185 {
3186         struct iwl_priv *priv = hw->priv;
3187
3188         IWL_DEBUG_MAC80211(priv, "enter\n");
3189
3190         if (!priv->is_open) {
3191                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3192                 return;
3193         }
3194
3195         priv->is_open = 0;
3196
3197         if (iwl_is_ready_rf(priv)) {
3198                 /* stop mac, cancel any scan request and clear
3199                  * RXON_FILTER_ASSOC_MSK BIT
3200                  */
3201                 mutex_lock(&priv->mutex);
3202                 iwl_scan_cancel_timeout(priv, 100);
3203                 mutex_unlock(&priv->mutex);
3204         }
3205
3206         iwl3945_down(priv);
3207
3208         flush_workqueue(priv->workqueue);
3209
3210         /* start polling the killswitch state again */
3211         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3212                            round_jiffies_relative(2 * HZ));
3213
3214         IWL_DEBUG_MAC80211(priv, "leave\n");
3215 }
3216
3217 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3218 {
3219         struct iwl_priv *priv = hw->priv;
3220
3221         IWL_DEBUG_MAC80211(priv, "enter\n");
3222
3223         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3224                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3225
3226         if (iwl3945_tx_skb(priv, skb))
3227                 dev_kfree_skb_any(skb);
3228
3229         IWL_DEBUG_MAC80211(priv, "leave\n");
3230         return NETDEV_TX_OK;
3231 }
3232
3233 void iwl3945_config_ap(struct iwl_priv *priv)
3234 {
3235         int rc = 0;
3236
3237         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3238                 return;
3239
3240         /* The following should be done only at AP bring up */
3241         if (!(iwl_is_associated(priv))) {
3242
3243                 /* RXON - unassoc (to set timing command) */
3244                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3245                 iwlcore_commit_rxon(priv);
3246
3247                 /* RXON Timing */
3248                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3249                 iwl_setup_rxon_timing(priv);
3250                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3251                                       sizeof(priv->rxon_timing),
3252                                       &priv->rxon_timing);
3253                 if (rc)
3254                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3255                                         "Attempting to continue.\n");
3256
3257                 /* FIXME: what should be the assoc_id for AP? */
3258                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3259                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3260                         priv->staging_rxon.flags |=
3261                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3262                 else
3263                         priv->staging_rxon.flags &=
3264                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3265
3266                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3267                         if (priv->assoc_capability &
3268                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3269                                 priv->staging_rxon.flags |=
3270                                         RXON_FLG_SHORT_SLOT_MSK;
3271                         else
3272                                 priv->staging_rxon.flags &=
3273                                         ~RXON_FLG_SHORT_SLOT_MSK;
3274
3275                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3276                                 priv->staging_rxon.flags &=
3277                                         ~RXON_FLG_SHORT_SLOT_MSK;
3278                 }
3279                 /* restore RXON assoc */
3280                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3281                 iwlcore_commit_rxon(priv);
3282                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3283         }
3284         iwl3945_send_beacon_cmd(priv);
3285
3286         /* FIXME - we need to add code here to detect a totally new
3287          * configuration, reset the AP, unassoc, rxon timing, assoc,
3288          * clear sta table, add BCAST sta... */
3289 }
3290
3291 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3292                                struct ieee80211_vif *vif,
3293                                struct ieee80211_sta *sta,
3294                                struct ieee80211_key_conf *key)
3295 {
3296         struct iwl_priv *priv = hw->priv;
3297         const u8 *addr;
3298         int ret = 0;
3299         u8 sta_id = IWL_INVALID_STATION;
3300         u8 static_key;
3301
3302         IWL_DEBUG_MAC80211(priv, "enter\n");
3303
3304         if (iwl3945_mod_params.sw_crypto) {
3305                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3306                 return -EOPNOTSUPP;
3307         }
3308
3309         addr = sta ? sta->addr : iwl_bcast_addr;
3310         static_key = !iwl_is_associated(priv);
3311
3312         if (!static_key) {
3313                 sta_id = iwl_find_station(priv, addr);
3314                 if (sta_id == IWL_INVALID_STATION) {
3315                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3316                                             addr);
3317                         return -EINVAL;
3318                 }
3319         }
3320
3321         mutex_lock(&priv->mutex);
3322         iwl_scan_cancel_timeout(priv, 100);
3323         mutex_unlock(&priv->mutex);
3324
3325         switch (cmd) {
3326         case SET_KEY:
3327                 if (static_key)
3328                         ret = iwl3945_set_static_key(priv, key);
3329                 else
3330                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3331                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3332                 break;
3333         case DISABLE_KEY:
3334                 if (static_key)
3335                         ret = iwl3945_remove_static_key(priv);
3336                 else
3337                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3338                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3339                 break;
3340         default:
3341                 ret = -EINVAL;
3342         }
3343
3344         IWL_DEBUG_MAC80211(priv, "leave\n");
3345
3346         return ret;
3347 }
3348
3349 /*****************************************************************************
3350  *
3351  * sysfs attributes
3352  *
3353  *****************************************************************************/
3354
3355 #ifdef CONFIG_IWLWIFI_DEBUG
3356
3357 /*
3358  * The following adds a new attribute to the sysfs representation
3359  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3360  * used for controlling the debug level.
3361  *
3362  * See the level definitions in iwl for details.
3363  *
3364  * The debug_level being managed using sysfs below is a per device debug
3365  * level that is used instead of the global debug level if it (the per
3366  * device debug level) is set.
3367  */
3368 static ssize_t show_debug_level(struct device *d,
3369                                 struct device_attribute *attr, char *buf)
3370 {
3371         struct iwl_priv *priv = dev_get_drvdata(d);
3372         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3373 }
3374 static ssize_t store_debug_level(struct device *d,
3375                                 struct device_attribute *attr,
3376                                  const char *buf, size_t count)
3377 {
3378         struct iwl_priv *priv = dev_get_drvdata(d);
3379         unsigned long val;
3380         int ret;
3381
3382         ret = strict_strtoul(buf, 0, &val);
3383         if (ret)
3384                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3385         else {
3386                 priv->debug_level = val;
3387                 if (iwl_alloc_traffic_mem(priv))
3388                         IWL_ERR(priv,
3389                                 "Not enough memory to generate traffic log\n");
3390         }
3391         return strnlen(buf, count);
3392 }
3393
3394 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3395                         show_debug_level, store_debug_level);
3396
3397 #endif /* CONFIG_IWLWIFI_DEBUG */
3398
3399 static ssize_t show_temperature(struct device *d,
3400                                 struct device_attribute *attr, char *buf)
3401 {
3402         struct iwl_priv *priv = dev_get_drvdata(d);
3403
3404         if (!iwl_is_alive(priv))
3405                 return -EAGAIN;
3406
3407         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3408 }
3409
3410 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3411
3412 static ssize_t show_tx_power(struct device *d,
3413                              struct device_attribute *attr, char *buf)
3414 {
3415         struct iwl_priv *priv = dev_get_drvdata(d);
3416         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3417 }
3418
3419 static ssize_t store_tx_power(struct device *d,
3420                               struct device_attribute *attr,
3421                               const char *buf, size_t count)
3422 {
3423         struct iwl_priv *priv = dev_get_drvdata(d);
3424         char *p = (char *)buf;
3425         u32 val;
3426
3427         val = simple_strtoul(p, &p, 10);
3428         if (p == buf)
3429                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3430         else
3431                 iwl3945_hw_reg_set_txpower(priv, val);
3432
3433         return count;
3434 }
3435
3436 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3437
3438 static ssize_t show_flags(struct device *d,
3439                           struct device_attribute *attr, char *buf)
3440 {
3441         struct iwl_priv *priv = dev_get_drvdata(d);
3442
3443         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3444 }
3445
3446 static ssize_t store_flags(struct device *d,
3447                            struct device_attribute *attr,
3448                            const char *buf, size_t count)
3449 {
3450         struct iwl_priv *priv = dev_get_drvdata(d);
3451         u32 flags = simple_strtoul(buf, NULL, 0);
3452
3453         mutex_lock(&priv->mutex);
3454         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3455                 /* Cancel any currently running scans... */
3456                 if (iwl_scan_cancel_timeout(priv, 100))
3457                         IWL_WARN(priv, "Could not cancel scan.\n");
3458                 else {
3459                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3460                                        flags);
3461                         priv->staging_rxon.flags = cpu_to_le32(flags);
3462                         iwlcore_commit_rxon(priv);
3463                 }
3464         }
3465         mutex_unlock(&priv->mutex);
3466
3467         return count;
3468 }
3469
3470 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3471
3472 static ssize_t show_filter_flags(struct device *d,
3473                                  struct device_attribute *attr, char *buf)
3474 {
3475         struct iwl_priv *priv = dev_get_drvdata(d);
3476
3477         return sprintf(buf, "0x%04X\n",
3478                 le32_to_cpu(priv->active_rxon.filter_flags));
3479 }
3480
3481 static ssize_t store_filter_flags(struct device *d,
3482                                   struct device_attribute *attr,
3483                                   const char *buf, size_t count)
3484 {
3485         struct iwl_priv *priv = dev_get_drvdata(d);
3486         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3487
3488         mutex_lock(&priv->mutex);
3489         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3490                 /* Cancel any currently running scans... */
3491                 if (iwl_scan_cancel_timeout(priv, 100))
3492                         IWL_WARN(priv, "Could not cancel scan.\n");
3493                 else {
3494                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3495                                        "0x%04X\n", filter_flags);
3496                         priv->staging_rxon.filter_flags =
3497                                 cpu_to_le32(filter_flags);
3498                         iwlcore_commit_rxon(priv);
3499                 }
3500         }
3501         mutex_unlock(&priv->mutex);
3502
3503         return count;
3504 }
3505
3506 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3507                    store_filter_flags);
3508
3509 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3510
3511 static ssize_t show_measurement(struct device *d,
3512                                 struct device_attribute *attr, char *buf)
3513 {
3514         struct iwl_priv *priv = dev_get_drvdata(d);
3515         struct iwl_spectrum_notification measure_report;
3516         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3517         u8 *data = (u8 *)&measure_report;
3518         unsigned long flags;
3519
3520         spin_lock_irqsave(&priv->lock, flags);
3521         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3522                 spin_unlock_irqrestore(&priv->lock, flags);
3523                 return 0;
3524         }
3525         memcpy(&measure_report, &priv->measure_report, size);
3526         priv->measurement_status = 0;
3527         spin_unlock_irqrestore(&priv->lock, flags);
3528
3529         while (size && (PAGE_SIZE - len)) {
3530                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3531                                    PAGE_SIZE - len, 1);
3532                 len = strlen(buf);
3533                 if (PAGE_SIZE - len)
3534                         buf[len++] = '\n';
3535
3536                 ofs += 16;
3537                 size -= min(size, 16U);
3538         }
3539
3540         return len;
3541 }
3542
3543 static ssize_t store_measurement(struct device *d,
3544                                  struct device_attribute *attr,
3545                                  const char *buf, size_t count)
3546 {
3547         struct iwl_priv *priv = dev_get_drvdata(d);
3548         struct ieee80211_measurement_params params = {
3549                 .channel = le16_to_cpu(priv->active_rxon.channel),
3550                 .start_time = cpu_to_le64(priv->last_tsf),
3551                 .duration = cpu_to_le16(1),
3552         };
3553         u8 type = IWL_MEASURE_BASIC;
3554         u8 buffer[32];
3555         u8 channel;
3556
3557         if (count) {
3558                 char *p = buffer;
3559                 strncpy(buffer, buf, min(sizeof(buffer), count));
3560                 channel = simple_strtoul(p, NULL, 0);
3561                 if (channel)
3562                         params.channel = channel;
3563
3564                 p = buffer;
3565                 while (*p && *p != ' ')
3566                         p++;
3567                 if (*p)
3568                         type = simple_strtoul(p + 1, NULL, 0);
3569         }
3570
3571         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3572                        "channel %d (for '%s')\n", type, params.channel, buf);
3573         iwl3945_get_measurement(priv, &params, type);
3574
3575         return count;
3576 }
3577
3578 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3579                    show_measurement, store_measurement);
3580 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3581
3582 static ssize_t store_retry_rate(struct device *d,
3583                                 struct device_attribute *attr,
3584                                 const char *buf, size_t count)
3585 {
3586         struct iwl_priv *priv = dev_get_drvdata(d);
3587
3588         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3589         if (priv->retry_rate <= 0)
3590                 priv->retry_rate = 1;
3591
3592         return count;
3593 }
3594
3595 static ssize_t show_retry_rate(struct device *d,
3596                                struct device_attribute *attr, char *buf)
3597 {
3598         struct iwl_priv *priv = dev_get_drvdata(d);
3599         return sprintf(buf, "%d", priv->retry_rate);
3600 }
3601
3602 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3603                    store_retry_rate);
3604
3605
3606 static ssize_t show_channels(struct device *d,
3607                              struct device_attribute *attr, char *buf)
3608 {
3609         /* all this shit doesn't belong into sysfs anyway */
3610         return 0;
3611 }
3612
3613 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3614
3615 static ssize_t show_statistics(struct device *d,
3616                                struct device_attribute *attr, char *buf)
3617 {
3618         struct iwl_priv *priv = dev_get_drvdata(d);
3619         u32 size = sizeof(struct iwl3945_notif_statistics);
3620         u32 len = 0, ofs = 0;
3621         u8 *data = (u8 *)&priv->statistics_39;
3622         int rc = 0;
3623
3624         if (!iwl_is_alive(priv))
3625                 return -EAGAIN;
3626
3627         mutex_lock(&priv->mutex);
3628         rc = iwl_send_statistics_request(priv, 0);
3629         mutex_unlock(&priv->mutex);
3630
3631         if (rc) {
3632                 len = sprintf(buf,
3633                               "Error sending statistics request: 0x%08X\n", rc);
3634                 return len;
3635         }
3636
3637         while (size && (PAGE_SIZE - len)) {
3638                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3639                                    PAGE_SIZE - len, 1);
3640                 len = strlen(buf);
3641                 if (PAGE_SIZE - len)
3642                         buf[len++] = '\n';
3643
3644                 ofs += 16;
3645                 size -= min(size, 16U);
3646         }
3647
3648         return len;
3649 }
3650
3651 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3652
3653 static ssize_t show_antenna(struct device *d,
3654                             struct device_attribute *attr, char *buf)
3655 {
3656         struct iwl_priv *priv = dev_get_drvdata(d);
3657
3658         if (!iwl_is_alive(priv))
3659                 return -EAGAIN;
3660
3661         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3662 }
3663
3664 static ssize_t store_antenna(struct device *d,
3665                              struct device_attribute *attr,
3666                              const char *buf, size_t count)
3667 {
3668         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3669         int ant;
3670
3671         if (count == 0)
3672                 return 0;
3673
3674         if (sscanf(buf, "%1i", &ant) != 1) {
3675                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3676                 return count;
3677         }
3678
3679         if ((ant >= 0) && (ant <= 2)) {
3680                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3681                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3682         } else
3683                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3684
3685
3686         return count;
3687 }
3688
3689 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3690
3691 static ssize_t show_status(struct device *d,
3692                            struct device_attribute *attr, char *buf)
3693 {
3694         struct iwl_priv *priv = dev_get_drvdata(d);
3695         if (!iwl_is_alive(priv))
3696                 return -EAGAIN;
3697         return sprintf(buf, "0x%08x\n", (int)priv->status);
3698 }
3699
3700 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3701
3702 static ssize_t dump_error_log(struct device *d,
3703                               struct device_attribute *attr,
3704                               const char *buf, size_t count)
3705 {
3706         struct iwl_priv *priv = dev_get_drvdata(d);
3707         char *p = (char *)buf;
3708
3709         if (p[0] == '1')
3710                 iwl3945_dump_nic_error_log(priv);
3711
3712         return strnlen(buf, count);
3713 }
3714
3715 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3716
3717 /*****************************************************************************
3718  *
3719  * driver setup and tear down
3720  *
3721  *****************************************************************************/
3722
3723 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3724 {
3725         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3726
3727         init_waitqueue_head(&priv->wait_command_queue);
3728
3729         INIT_WORK(&priv->up, iwl3945_bg_up);
3730         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3731         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3732         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3733         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3734         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3735         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3736         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3737         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3738         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3739         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3740
3741         iwl3945_hw_setup_deferred_work(priv);
3742
3743         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3744                      iwl3945_irq_tasklet, (unsigned long)priv);
3745 }
3746
3747 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3748 {
3749         iwl3945_hw_cancel_deferred_work(priv);
3750
3751         cancel_delayed_work_sync(&priv->init_alive_start);
3752         cancel_delayed_work(&priv->scan_check);
3753         cancel_delayed_work(&priv->alive_start);
3754         cancel_work_sync(&priv->beacon_update);
3755 }
3756
3757 static struct attribute *iwl3945_sysfs_entries[] = {
3758         &dev_attr_antenna.attr,
3759         &dev_attr_channels.attr,
3760         &dev_attr_dump_errors.attr,
3761         &dev_attr_flags.attr,
3762         &dev_attr_filter_flags.attr,
3763 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3764         &dev_attr_measurement.attr,
3765 #endif
3766         &dev_attr_retry_rate.attr,
3767         &dev_attr_statistics.attr,
3768         &dev_attr_status.attr,
3769         &dev_attr_temperature.attr,
3770         &dev_attr_tx_power.attr,
3771 #ifdef CONFIG_IWLWIFI_DEBUG
3772         &dev_attr_debug_level.attr,
3773 #endif
3774         NULL
3775 };
3776
3777 static struct attribute_group iwl3945_attribute_group = {
3778         .name = NULL,           /* put in device directory */
3779         .attrs = iwl3945_sysfs_entries,
3780 };
3781
3782 static struct ieee80211_ops iwl3945_hw_ops = {
3783         .tx = iwl3945_mac_tx,
3784         .start = iwl3945_mac_start,
3785         .stop = iwl3945_mac_stop,
3786         .add_interface = iwl_mac_add_interface,
3787         .remove_interface = iwl_mac_remove_interface,
3788         .config = iwl_mac_config,
3789         .configure_filter = iwl_configure_filter,
3790         .set_key = iwl3945_mac_set_key,
3791         .get_tx_stats = iwl_mac_get_tx_stats,
3792         .conf_tx = iwl_mac_conf_tx,
3793         .reset_tsf = iwl_mac_reset_tsf,
3794         .bss_info_changed = iwl_bss_info_changed,
3795         .hw_scan = iwl_mac_hw_scan
3796 };
3797
3798 static int iwl3945_init_drv(struct iwl_priv *priv)
3799 {
3800         int ret;
3801         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3802
3803         priv->retry_rate = 1;
3804         priv->ibss_beacon = NULL;
3805
3806         spin_lock_init(&priv->lock);
3807         spin_lock_init(&priv->sta_lock);
3808         spin_lock_init(&priv->hcmd_lock);
3809
3810         INIT_LIST_HEAD(&priv->free_frames);
3811
3812         mutex_init(&priv->mutex);
3813
3814         /* Clear the driver's (not device's) station table */
3815         iwl_clear_stations_table(priv);
3816
3817         priv->ieee_channels = NULL;
3818         priv->ieee_rates = NULL;
3819         priv->band = IEEE80211_BAND_2GHZ;
3820
3821         priv->iw_mode = NL80211_IFTYPE_STATION;
3822
3823         iwl_reset_qos(priv);
3824
3825         priv->qos_data.qos_active = 0;
3826         priv->qos_data.qos_cap.val = 0;
3827
3828         priv->rates_mask = IWL_RATES_MASK;
3829         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3830
3831         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3832                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3833                          eeprom->version);
3834                 ret = -EINVAL;
3835                 goto err;
3836         }
3837         ret = iwl_init_channel_map(priv);
3838         if (ret) {
3839                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3840                 goto err;
3841         }
3842
3843         /* Set up txpower settings in driver for all channels */
3844         if (iwl3945_txpower_set_from_eeprom(priv)) {
3845                 ret = -EIO;
3846                 goto err_free_channel_map;
3847         }
3848
3849         ret = iwlcore_init_geos(priv);
3850         if (ret) {
3851                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3852                 goto err_free_channel_map;
3853         }
3854         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3855
3856         return 0;
3857
3858 err_free_channel_map:
3859         iwl_free_channel_map(priv);
3860 err:
3861         return ret;
3862 }
3863
3864 static int iwl3945_setup_mac(struct iwl_priv *priv)
3865 {
3866         int ret;
3867         struct ieee80211_hw *hw = priv->hw;
3868
3869         hw->rate_control_algorithm = "iwl-3945-rs";
3870         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3871
3872         /* Tell mac80211 our characteristics */
3873         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3874                     IEEE80211_HW_NOISE_DBM |
3875                     IEEE80211_HW_SPECTRUM_MGMT |
3876                     IEEE80211_HW_SUPPORTS_PS |
3877                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3878
3879         hw->wiphy->interface_modes =
3880                 BIT(NL80211_IFTYPE_STATION) |
3881                 BIT(NL80211_IFTYPE_ADHOC);
3882
3883         hw->wiphy->custom_regulatory = true;
3884
3885         /* Firmware does not support this */
3886         hw->wiphy->disable_beacon_hints = true;
3887
3888         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3889         /* we create the 802.11 header and a zero-length SSID element */
3890         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3891
3892         /* Default value; 4 EDCA QOS priorities */
3893         hw->queues = 4;
3894
3895         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3896                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3897                         &priv->bands[IEEE80211_BAND_2GHZ];
3898
3899         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3900                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3901                         &priv->bands[IEEE80211_BAND_5GHZ];
3902
3903         ret = ieee80211_register_hw(priv->hw);
3904         if (ret) {
3905                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3906                 return ret;
3907         }
3908         priv->mac80211_registered = 1;
3909
3910         return 0;
3911 }
3912
3913 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3914 {
3915         int err = 0;
3916         struct iwl_priv *priv;
3917         struct ieee80211_hw *hw;
3918         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3919         struct iwl3945_eeprom *eeprom;
3920         unsigned long flags;
3921
3922         /***********************
3923          * 1. Allocating HW data
3924          * ********************/
3925
3926         /* mac80211 allocates memory for this device instance, including
3927          *   space for this driver's private structure */
3928         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3929         if (hw == NULL) {
3930                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3931                 err = -ENOMEM;
3932                 goto out;
3933         }
3934         priv = hw->priv;
3935         SET_IEEE80211_DEV(hw, &pdev->dev);
3936
3937         /*
3938          * Disabling hardware scan means that mac80211 will perform scans
3939          * "the hard way", rather than using device's scan.
3940          */
3941         if (iwl3945_mod_params.disable_hw_scan) {
3942                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3943                 iwl3945_hw_ops.hw_scan = NULL;
3944         }
3945
3946
3947         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3948         priv->cfg = cfg;
3949         priv->pci_dev = pdev;
3950         priv->inta_mask = CSR_INI_SET_MASK;
3951
3952 #ifdef CONFIG_IWLWIFI_DEBUG
3953         atomic_set(&priv->restrict_refcnt, 0);
3954 #endif
3955         if (iwl_alloc_traffic_mem(priv))
3956                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3957
3958         /***************************
3959          * 2. Initializing PCI bus
3960          * *************************/
3961         if (pci_enable_device(pdev)) {
3962                 err = -ENODEV;
3963                 goto out_ieee80211_free_hw;
3964         }
3965
3966         pci_set_master(pdev);
3967
3968         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3969         if (!err)
3970                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3971         if (err) {
3972                 IWL_WARN(priv, "No suitable DMA available.\n");
3973                 goto out_pci_disable_device;
3974         }
3975
3976         pci_set_drvdata(pdev, priv);
3977         err = pci_request_regions(pdev, DRV_NAME);
3978         if (err)
3979                 goto out_pci_disable_device;
3980
3981         /***********************
3982          * 3. Read REV Register
3983          * ********************/
3984         priv->hw_base = pci_iomap(pdev, 0, 0);
3985         if (!priv->hw_base) {
3986                 err = -ENODEV;
3987                 goto out_pci_release_regions;
3988         }
3989
3990         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3991                         (unsigned long long) pci_resource_len(pdev, 0));
3992         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3993
3994         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3995          * PCI Tx retries from interfering with C3 CPU state */
3996         pci_write_config_byte(pdev, 0x41, 0x00);
3997
3998         /* this spin lock will be used in apm_ops.init and EEPROM access
3999          * we should init now
4000          */
4001         spin_lock_init(&priv->reg_lock);
4002
4003         /***********************
4004          * 4. Read EEPROM
4005          * ********************/
4006
4007         /* Read the EEPROM */
4008         err = iwl_eeprom_init(priv);
4009         if (err) {
4010                 IWL_ERR(priv, "Unable to init EEPROM\n");
4011                 goto out_iounmap;
4012         }
4013         /* MAC Address location in EEPROM same for 3945/4965 */
4014         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4015         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4016         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4017         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4018
4019         /***********************
4020          * 5. Setup HW Constants
4021          * ********************/
4022         /* Device-specific setup */
4023         if (iwl3945_hw_set_hw_params(priv)) {
4024                 IWL_ERR(priv, "failed to set hw settings\n");
4025                 goto out_eeprom_free;
4026         }
4027
4028         /***********************
4029          * 6. Setup priv
4030          * ********************/
4031
4032         err = iwl3945_init_drv(priv);
4033         if (err) {
4034                 IWL_ERR(priv, "initializing driver failed\n");
4035                 goto out_unset_hw_params;
4036         }
4037
4038         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4039                 priv->cfg->name);
4040
4041         /***********************
4042          * 7. Setup Services
4043          * ********************/
4044
4045         spin_lock_irqsave(&priv->lock, flags);
4046         iwl_disable_interrupts(priv);
4047         spin_unlock_irqrestore(&priv->lock, flags);
4048
4049         pci_enable_msi(priv->pci_dev);
4050
4051         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4052                           IRQF_SHARED, DRV_NAME, priv);
4053         if (err) {
4054                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4055                 goto out_disable_msi;
4056         }
4057
4058         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4059         if (err) {
4060                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4061                 goto out_release_irq;
4062         }
4063
4064         iwl_set_rxon_channel(priv,
4065                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4066         iwl3945_setup_deferred_work(priv);
4067         iwl3945_setup_rx_handlers(priv);
4068         iwl_power_initialize(priv);
4069
4070         /*********************************
4071          * 8. Setup and Register mac80211
4072          * *******************************/
4073
4074         iwl_enable_interrupts(priv);
4075
4076         err = iwl3945_setup_mac(priv);
4077         if (err)
4078                 goto  out_remove_sysfs;
4079
4080         err = iwl_dbgfs_register(priv, DRV_NAME);
4081         if (err)
4082                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4083
4084         /* Start monitoring the killswitch */
4085         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4086                            2 * HZ);
4087
4088         return 0;
4089
4090  out_remove_sysfs:
4091         destroy_workqueue(priv->workqueue);
4092         priv->workqueue = NULL;
4093         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4094  out_release_irq:
4095         free_irq(priv->pci_dev->irq, priv);
4096  out_disable_msi:
4097         pci_disable_msi(priv->pci_dev);
4098         iwlcore_free_geos(priv);
4099         iwl_free_channel_map(priv);
4100  out_unset_hw_params:
4101         iwl3945_unset_hw_params(priv);
4102  out_eeprom_free:
4103         iwl_eeprom_free(priv);
4104  out_iounmap:
4105         pci_iounmap(pdev, priv->hw_base);
4106  out_pci_release_regions:
4107         pci_release_regions(pdev);
4108  out_pci_disable_device:
4109         pci_set_drvdata(pdev, NULL);
4110         pci_disable_device(pdev);
4111  out_ieee80211_free_hw:
4112         iwl_free_traffic_mem(priv);
4113         ieee80211_free_hw(priv->hw);
4114  out:
4115         return err;
4116 }
4117
4118 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4119 {
4120         struct iwl_priv *priv = pci_get_drvdata(pdev);
4121         unsigned long flags;
4122
4123         if (!priv)
4124                 return;
4125
4126         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4127
4128         iwl_dbgfs_unregister(priv);
4129
4130         set_bit(STATUS_EXIT_PENDING, &priv->status);
4131
4132         if (priv->mac80211_registered) {
4133                 ieee80211_unregister_hw(priv->hw);
4134                 priv->mac80211_registered = 0;
4135         } else {
4136                 iwl3945_down(priv);
4137         }
4138
4139         /*
4140          * Make sure device is reset to low power before unloading driver.
4141          * This may be redundant with iwl_down(), but there are paths to
4142          * run iwl_down() without calling apm_ops.stop(), and there are
4143          * paths to avoid running iwl_down() at all before leaving driver.
4144          * This (inexpensive) call *makes sure* device is reset.
4145          */
4146         priv->cfg->ops->lib->apm_ops.stop(priv);
4147
4148         /* make sure we flush any pending irq or
4149          * tasklet for the driver
4150          */
4151         spin_lock_irqsave(&priv->lock, flags);
4152         iwl_disable_interrupts(priv);
4153         spin_unlock_irqrestore(&priv->lock, flags);
4154
4155         iwl_synchronize_irq(priv);
4156
4157         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4158
4159         cancel_delayed_work_sync(&priv->rfkill_poll);
4160
4161         iwl3945_dealloc_ucode_pci(priv);
4162
4163         if (priv->rxq.bd)
4164                 iwl3945_rx_queue_free(priv, &priv->rxq);
4165         iwl3945_hw_txq_ctx_free(priv);
4166
4167         iwl3945_unset_hw_params(priv);
4168         iwl_clear_stations_table(priv);
4169
4170         /*netif_stop_queue(dev); */
4171         flush_workqueue(priv->workqueue);
4172
4173         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4174          * priv->workqueue... so we can't take down the workqueue
4175          * until now... */
4176         destroy_workqueue(priv->workqueue);
4177         priv->workqueue = NULL;
4178         iwl_free_traffic_mem(priv);
4179
4180         free_irq(pdev->irq, priv);
4181         pci_disable_msi(pdev);
4182
4183         pci_iounmap(pdev, priv->hw_base);
4184         pci_release_regions(pdev);
4185         pci_disable_device(pdev);
4186         pci_set_drvdata(pdev, NULL);
4187
4188         iwl_free_channel_map(priv);
4189         iwlcore_free_geos(priv);
4190         kfree(priv->scan);
4191         if (priv->ibss_beacon)
4192                 dev_kfree_skb(priv->ibss_beacon);
4193
4194         ieee80211_free_hw(priv->hw);
4195 }
4196
4197
4198 /*****************************************************************************
4199  *
4200  * driver and module entry point
4201  *
4202  *****************************************************************************/
4203
4204 static struct pci_driver iwl3945_driver = {
4205         .name = DRV_NAME,
4206         .id_table = iwl3945_hw_card_ids,
4207         .probe = iwl3945_pci_probe,
4208         .remove = __devexit_p(iwl3945_pci_remove),
4209 #ifdef CONFIG_PM
4210         .suspend = iwl_pci_suspend,
4211         .resume = iwl_pci_resume,
4212 #endif
4213 };
4214
4215 static int __init iwl3945_init(void)
4216 {
4217
4218         int ret;
4219         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4220         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4221
4222         ret = iwl3945_rate_control_register();
4223         if (ret) {
4224                 printk(KERN_ERR DRV_NAME
4225                        "Unable to register rate control algorithm: %d\n", ret);
4226                 return ret;
4227         }
4228
4229         ret = pci_register_driver(&iwl3945_driver);
4230         if (ret) {
4231                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4232                 goto error_register;
4233         }
4234
4235         return ret;
4236
4237 error_register:
4238         iwl3945_rate_control_unregister();
4239         return ret;
4240 }
4241
4242 static void __exit iwl3945_exit(void)
4243 {
4244         pci_unregister_driver(&iwl3945_driver);
4245         iwl3945_rate_control_unregister();
4246 }
4247
4248 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4249
4250 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4251 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4252 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4253 MODULE_PARM_DESC(swcrypto,
4254                  "using software crypto (default 1 [software])\n");
4255 #ifdef CONFIG_IWLWIFI_DEBUG
4256 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4257 MODULE_PARM_DESC(debug, "debug output mask");
4258 #endif
4259 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4260                    int, S_IRUGO);
4261 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4262 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4263 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4264
4265 module_exit(iwl3945_exit);
4266 module_init(iwl3945_init);