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 - priv->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                 /* For now we just don't re-use anything.  We can tweak this
1442                  * later to try and re-use notification packets and SKBs that
1443                  * fail to Rx correctly */
1444                 if (rxb->page != NULL) {
1445                         priv->alloc_rxb_page--;
1446                         __free_pages(rxb->page, priv->hw_params.rx_page_order);
1447                         rxb->page = NULL;
1448                 }
1449
1450                 spin_lock_irqsave(&rxq->lock, flags);
1451                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1452                 spin_unlock_irqrestore(&rxq->lock, flags);
1453                 i = (i + 1) & RX_QUEUE_MASK;
1454                 /* If there are a lot of unused frames,
1455                  * restock the Rx queue so ucode won't assert. */
1456                 if (fill_rx) {
1457                         count++;
1458                         if (count >= 8) {
1459                                 priv->rxq.read = i;
1460                                 iwl3945_rx_replenish_now(priv);
1461                                 count = 0;
1462                         }
1463                 }
1464         }
1465
1466         /* Backtrack one entry */
1467         priv->rxq.read = i;
1468         if (fill_rx)
1469                 iwl3945_rx_replenish_now(priv);
1470         else
1471                 iwl3945_rx_queue_restock(priv);
1472 }
1473
1474 /* call this function to flush any scheduled tasklet */
1475 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1476 {
1477         /* wait to make sure we flush pending tasklet*/
1478         synchronize_irq(priv->pci_dev->irq);
1479         tasklet_kill(&priv->irq_tasklet);
1480 }
1481
1482 #ifdef CONFIG_IWLWIFI_DEBUG
1483 static const char *desc_lookup(int i)
1484 {
1485         switch (i) {
1486         case 1:
1487                 return "FAIL";
1488         case 2:
1489                 return "BAD_PARAM";
1490         case 3:
1491                 return "BAD_CHECKSUM";
1492         case 4:
1493                 return "NMI_INTERRUPT";
1494         case 5:
1495                 return "SYSASSERT";
1496         case 6:
1497                 return "FATAL_ERROR";
1498         }
1499
1500         return "UNKNOWN";
1501 }
1502
1503 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1504 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1505
1506 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1507 {
1508         u32 i;
1509         u32 desc, time, count, base, data1;
1510         u32 blink1, blink2, ilink1, ilink2;
1511
1512         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1513
1514         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1515                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1516                 return;
1517         }
1518
1519
1520         count = iwl_read_targ_mem(priv, base);
1521
1522         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1523                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1524                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1525                         priv->status, count);
1526         }
1527
1528         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1529                   "ilink1  nmiPC   Line\n");
1530         for (i = ERROR_START_OFFSET;
1531              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1532              i += ERROR_ELEM_SIZE) {
1533                 desc = iwl_read_targ_mem(priv, base + i);
1534                 time =
1535                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1536                 blink1 =
1537                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1538                 blink2 =
1539                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1540                 ilink1 =
1541                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1542                 ilink2 =
1543                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1544                 data1 =
1545                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1546
1547                 IWL_ERR(priv,
1548                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1549                         desc_lookup(desc), desc, time, blink1, blink2,
1550                         ilink1, ilink2, data1);
1551                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1552                                         0, blink1, blink2, ilink1, ilink2);
1553         }
1554 }
1555
1556 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1557
1558 /**
1559  * iwl3945_print_event_log - Dump error event log to syslog
1560  *
1561  */
1562 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1563                                 u32 num_events, u32 mode)
1564 {
1565         u32 i;
1566         u32 base;       /* SRAM byte address of event log header */
1567         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1568         u32 ptr;        /* SRAM byte address of log data */
1569         u32 ev, time, data; /* event log data */
1570
1571         if (num_events == 0)
1572                 return;
1573
1574         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1575
1576         if (mode == 0)
1577                 event_size = 2 * sizeof(u32);
1578         else
1579                 event_size = 3 * sizeof(u32);
1580
1581         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1582
1583         /* "time" is actually "data" for mode 0 (no timestamp).
1584          * place event id # at far right for easier visual parsing. */
1585         for (i = 0; i < num_events; i++) {
1586                 ev = iwl_read_targ_mem(priv, ptr);
1587                 ptr += sizeof(u32);
1588                 time = iwl_read_targ_mem(priv, ptr);
1589                 ptr += sizeof(u32);
1590                 if (mode == 0) {
1591                         /* data, ev */
1592                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1593                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1594                 } else {
1595                         data = iwl_read_targ_mem(priv, ptr);
1596                         ptr += sizeof(u32);
1597                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1598                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1599                 }
1600         }
1601 }
1602
1603 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1604 {
1605         u32 base;       /* SRAM byte address of event log header */
1606         u32 capacity;   /* event log capacity in # entries */
1607         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1608         u32 num_wraps;  /* # times uCode wrapped to top of log */
1609         u32 next_entry; /* index of next entry to be written by uCode */
1610         u32 size;       /* # entries that we'll print */
1611
1612         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1613         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1614                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1615                 return;
1616         }
1617
1618         /* event log header */
1619         capacity = iwl_read_targ_mem(priv, base);
1620         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1621         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1622         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1623
1624         size = num_wraps ? capacity : next_entry;
1625
1626         /* bail out if nothing in log */
1627         if (size == 0) {
1628                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1629                 return;
1630         }
1631
1632         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1633                   size, num_wraps);
1634
1635         /* if uCode has wrapped back to top of log, start at the oldest entry,
1636          * i.e the next one that uCode would fill. */
1637         if (num_wraps)
1638                 iwl3945_print_event_log(priv, next_entry,
1639                                     capacity - next_entry, mode);
1640
1641         /* (then/else) start at top of log */
1642         iwl3945_print_event_log(priv, 0, next_entry, mode);
1643
1644 }
1645 #else
1646 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1647 {
1648 }
1649
1650 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1651 {
1652 }
1653
1654 #endif
1655
1656 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1657 {
1658         u32 inta, handled = 0;
1659         u32 inta_fh;
1660         unsigned long flags;
1661 #ifdef CONFIG_IWLWIFI_DEBUG
1662         u32 inta_mask;
1663 #endif
1664
1665         spin_lock_irqsave(&priv->lock, flags);
1666
1667         /* Ack/clear/reset pending uCode interrupts.
1668          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1669          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1670         inta = iwl_read32(priv, CSR_INT);
1671         iwl_write32(priv, CSR_INT, inta);
1672
1673         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1674          * Any new interrupts that happen after this, either while we're
1675          * in this tasklet, or later, will show up in next ISR/tasklet. */
1676         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1677         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1678
1679 #ifdef CONFIG_IWLWIFI_DEBUG
1680         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1681                 /* just for debug */
1682                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1683                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1684                               inta, inta_mask, inta_fh);
1685         }
1686 #endif
1687
1688         spin_unlock_irqrestore(&priv->lock, flags);
1689
1690         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1691          * atomic, make sure that inta covers all the interrupts that
1692          * we've discovered, even if FH interrupt came in just after
1693          * reading CSR_INT. */
1694         if (inta_fh & CSR39_FH_INT_RX_MASK)
1695                 inta |= CSR_INT_BIT_FH_RX;
1696         if (inta_fh & CSR39_FH_INT_TX_MASK)
1697                 inta |= CSR_INT_BIT_FH_TX;
1698
1699         /* Now service all interrupt bits discovered above. */
1700         if (inta & CSR_INT_BIT_HW_ERR) {
1701                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1702
1703                 /* Tell the device to stop sending interrupts */
1704                 iwl_disable_interrupts(priv);
1705
1706                 priv->isr_stats.hw++;
1707                 iwl_irq_handle_error(priv);
1708
1709                 handled |= CSR_INT_BIT_HW_ERR;
1710
1711                 return;
1712         }
1713
1714 #ifdef CONFIG_IWLWIFI_DEBUG
1715         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1716                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1717                 if (inta & CSR_INT_BIT_SCD) {
1718                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1719                                       "the frame/frames.\n");
1720                         priv->isr_stats.sch++;
1721                 }
1722
1723                 /* Alive notification via Rx interrupt will do the real work */
1724                 if (inta & CSR_INT_BIT_ALIVE) {
1725                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1726                         priv->isr_stats.alive++;
1727                 }
1728         }
1729 #endif
1730         /* Safely ignore these bits for debug checks below */
1731         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1732
1733         /* Error detected by uCode */
1734         if (inta & CSR_INT_BIT_SW_ERR) {
1735                 IWL_ERR(priv, "Microcode SW error detected. "
1736                         "Restarting 0x%X.\n", inta);
1737                 priv->isr_stats.sw++;
1738                 priv->isr_stats.sw_err = inta;
1739                 iwl_irq_handle_error(priv);
1740                 handled |= CSR_INT_BIT_SW_ERR;
1741         }
1742
1743         /* uCode wakes up after power-down sleep */
1744         if (inta & CSR_INT_BIT_WAKEUP) {
1745                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1746                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1747                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1748                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1749                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1750                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1751                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1752                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1753
1754                 priv->isr_stats.wakeup++;
1755                 handled |= CSR_INT_BIT_WAKEUP;
1756         }
1757
1758         /* All uCode command responses, including Tx command responses,
1759          * Rx "responses" (frame-received notification), and other
1760          * notifications from uCode come through here*/
1761         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1762                 iwl3945_rx_handle(priv);
1763                 priv->isr_stats.rx++;
1764                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1765         }
1766
1767         if (inta & CSR_INT_BIT_FH_TX) {
1768                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1769                 priv->isr_stats.tx++;
1770
1771                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1772                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1773                                         (FH39_SRVC_CHNL), 0x0);
1774                 handled |= CSR_INT_BIT_FH_TX;
1775         }
1776
1777         if (inta & ~handled) {
1778                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1779                 priv->isr_stats.unhandled++;
1780         }
1781
1782         if (inta & ~priv->inta_mask) {
1783                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1784                          inta & ~priv->inta_mask);
1785                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1786         }
1787
1788         /* Re-enable all interrupts */
1789         /* only Re-enable if disabled by irq */
1790         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1791                 iwl_enable_interrupts(priv);
1792
1793 #ifdef CONFIG_IWLWIFI_DEBUG
1794         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1795                 inta = iwl_read32(priv, CSR_INT);
1796                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1797                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1798                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1799                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1800         }
1801 #endif
1802 }
1803
1804 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1805                                          enum ieee80211_band band,
1806                                      u8 is_active, u8 n_probes,
1807                                      struct iwl3945_scan_channel *scan_ch)
1808 {
1809         struct ieee80211_channel *chan;
1810         const struct ieee80211_supported_band *sband;
1811         const struct iwl_channel_info *ch_info;
1812         u16 passive_dwell = 0;
1813         u16 active_dwell = 0;
1814         int added, i;
1815
1816         sband = iwl_get_hw_mode(priv, band);
1817         if (!sband)
1818                 return 0;
1819
1820         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1821         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1822
1823         if (passive_dwell <= active_dwell)
1824                 passive_dwell = active_dwell + 1;
1825
1826         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1827                 chan = priv->scan_request->channels[i];
1828
1829                 if (chan->band != band)
1830                         continue;
1831
1832                 scan_ch->channel = chan->hw_value;
1833
1834                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1835                 if (!is_channel_valid(ch_info)) {
1836                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1837                                        scan_ch->channel);
1838                         continue;
1839                 }
1840
1841                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1842                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1843                 /* If passive , set up for auto-switch
1844                  *  and use long active_dwell time.
1845                  */
1846                 if (!is_active || is_channel_passive(ch_info) ||
1847                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1848                         scan_ch->type = 0;      /* passive */
1849                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1850                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1851                 } else {
1852                         scan_ch->type = 1;      /* active */
1853                 }
1854
1855                 /* Set direct probe bits. These may be used both for active
1856                  * scan channels (probes gets sent right away),
1857                  * or for passive channels (probes get se sent only after
1858                  * hearing clear Rx packet).*/
1859                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1860                         if (n_probes)
1861                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1862                 } else {
1863                         /* uCode v1 does not allow setting direct probe bits on
1864                          * passive channel. */
1865                         if ((scan_ch->type & 1) && n_probes)
1866                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1867                 }
1868
1869                 /* Set txpower levels to defaults */
1870                 scan_ch->tpc.dsp_atten = 110;
1871                 /* scan_pwr_info->tpc.dsp_atten; */
1872
1873                 /*scan_pwr_info->tpc.tx_gain; */
1874                 if (band == IEEE80211_BAND_5GHZ)
1875                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1876                 else {
1877                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1878                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1879                          * power level:
1880                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1881                          */
1882                 }
1883
1884                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1885                                scan_ch->channel,
1886                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1887                                (scan_ch->type & 1) ?
1888                                active_dwell : passive_dwell);
1889
1890                 scan_ch++;
1891                 added++;
1892         }
1893
1894         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1895         return added;
1896 }
1897
1898 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1899                               struct ieee80211_rate *rates)
1900 {
1901         int i;
1902
1903         for (i = 0; i < IWL_RATE_COUNT; i++) {
1904                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1905                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1906                 rates[i].hw_value_short = i;
1907                 rates[i].flags = 0;
1908                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1909                         /*
1910                          * If CCK != 1M then set short preamble rate flag.
1911                          */
1912                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1913                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1914                 }
1915         }
1916 }
1917
1918 /******************************************************************************
1919  *
1920  * uCode download functions
1921  *
1922  ******************************************************************************/
1923
1924 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1925 {
1926         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1927         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1928         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1929         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1930         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1931         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1932 }
1933
1934 /**
1935  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1936  *     looking at all data.
1937  */
1938 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1939 {
1940         u32 val;
1941         u32 save_len = len;
1942         int rc = 0;
1943         u32 errcnt;
1944
1945         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1946
1947         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1948                                IWL39_RTC_INST_LOWER_BOUND);
1949
1950         errcnt = 0;
1951         for (; len > 0; len -= sizeof(u32), image++) {
1952                 /* read data comes through single port, auto-incr addr */
1953                 /* NOTE: Use the debugless read so we don't flood kernel log
1954                  * if IWL_DL_IO is set */
1955                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1956                 if (val != le32_to_cpu(*image)) {
1957                         IWL_ERR(priv, "uCode INST section is invalid at "
1958                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1959                                   save_len - len, val, le32_to_cpu(*image));
1960                         rc = -EIO;
1961                         errcnt++;
1962                         if (errcnt >= 20)
1963                                 break;
1964                 }
1965         }
1966
1967
1968         if (!errcnt)
1969                 IWL_DEBUG_INFO(priv,
1970                         "ucode image in INSTRUCTION memory is good\n");
1971
1972         return rc;
1973 }
1974
1975
1976 /**
1977  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1978  *   using sample data 100 bytes apart.  If these sample points are good,
1979  *   it's a pretty good bet that everything between them is good, too.
1980  */
1981 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1982 {
1983         u32 val;
1984         int rc = 0;
1985         u32 errcnt = 0;
1986         u32 i;
1987
1988         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1989
1990         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1991                 /* read data comes through single port, auto-incr addr */
1992                 /* NOTE: Use the debugless read so we don't flood kernel log
1993                  * if IWL_DL_IO is set */
1994                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1995                         i + IWL39_RTC_INST_LOWER_BOUND);
1996                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1997                 if (val != le32_to_cpu(*image)) {
1998 #if 0 /* Enable this if you want to see details */
1999                         IWL_ERR(priv, "uCode INST section is invalid at "
2000                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2001                                   i, val, *image);
2002 #endif
2003                         rc = -EIO;
2004                         errcnt++;
2005                         if (errcnt >= 3)
2006                                 break;
2007                 }
2008         }
2009
2010         return rc;
2011 }
2012
2013
2014 /**
2015  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2016  *    and verify its contents
2017  */
2018 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2019 {
2020         __le32 *image;
2021         u32 len;
2022         int rc = 0;
2023
2024         /* Try bootstrap */
2025         image = (__le32 *)priv->ucode_boot.v_addr;
2026         len = priv->ucode_boot.len;
2027         rc = iwl3945_verify_inst_sparse(priv, image, len);
2028         if (rc == 0) {
2029                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2030                 return 0;
2031         }
2032
2033         /* Try initialize */
2034         image = (__le32 *)priv->ucode_init.v_addr;
2035         len = priv->ucode_init.len;
2036         rc = iwl3945_verify_inst_sparse(priv, image, len);
2037         if (rc == 0) {
2038                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2039                 return 0;
2040         }
2041
2042         /* Try runtime/protocol */
2043         image = (__le32 *)priv->ucode_code.v_addr;
2044         len = priv->ucode_code.len;
2045         rc = iwl3945_verify_inst_sparse(priv, image, len);
2046         if (rc == 0) {
2047                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2048                 return 0;
2049         }
2050
2051         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2052
2053         /* Since nothing seems to match, show first several data entries in
2054          * instruction SRAM, so maybe visual inspection will give a clue.
2055          * Selection of bootstrap image (vs. other images) is arbitrary. */
2056         image = (__le32 *)priv->ucode_boot.v_addr;
2057         len = priv->ucode_boot.len;
2058         rc = iwl3945_verify_inst_full(priv, image, len);
2059
2060         return rc;
2061 }
2062
2063 static void iwl3945_nic_start(struct iwl_priv *priv)
2064 {
2065         /* Remove all resets to allow NIC to operate */
2066         iwl_write32(priv, CSR_RESET, 0);
2067 }
2068
2069 /**
2070  * iwl3945_read_ucode - Read uCode images from disk file.
2071  *
2072  * Copy into buffers for card to fetch via bus-mastering
2073  */
2074 static int iwl3945_read_ucode(struct iwl_priv *priv)
2075 {
2076         const struct iwl_ucode_header *ucode;
2077         int ret = -EINVAL, index;
2078         const struct firmware *ucode_raw;
2079         /* firmware file name contains uCode/driver compatibility version */
2080         const char *name_pre = priv->cfg->fw_name_pre;
2081         const unsigned int api_max = priv->cfg->ucode_api_max;
2082         const unsigned int api_min = priv->cfg->ucode_api_min;
2083         char buf[25];
2084         u8 *src;
2085         size_t len;
2086         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2087
2088         /* Ask kernel firmware_class module to get the boot firmware off disk.
2089          * request_firmware() is synchronous, file is in memory on return. */
2090         for (index = api_max; index >= api_min; index--) {
2091                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2092                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2093                 if (ret < 0) {
2094                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2095                                   buf, ret);
2096                         if (ret == -ENOENT)
2097                                 continue;
2098                         else
2099                                 goto error;
2100                 } else {
2101                         if (index < api_max)
2102                                 IWL_ERR(priv, "Loaded firmware %s, "
2103                                         "which is deprecated. "
2104                                         " Please use API v%u instead.\n",
2105                                           buf, api_max);
2106                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2107                                        "(%zd bytes) from disk\n",
2108                                        buf, ucode_raw->size);
2109                         break;
2110                 }
2111         }
2112
2113         if (ret < 0)
2114                 goto error;
2115
2116         /* Make sure that we got at least our header! */
2117         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2118                 IWL_ERR(priv, "File size way too small!\n");
2119                 ret = -EINVAL;
2120                 goto err_release;
2121         }
2122
2123         /* Data from ucode file:  header followed by uCode images */
2124         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2125
2126         priv->ucode_ver = le32_to_cpu(ucode->ver);
2127         api_ver = IWL_UCODE_API(priv->ucode_ver);
2128         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2129         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2130         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2131         init_data_size =
2132                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2133         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2134         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2135
2136         /* api_ver should match the api version forming part of the
2137          * firmware filename ... but we don't check for that and only rely
2138          * on the API version read from firmware header from here on forward */
2139
2140         if (api_ver < api_min || api_ver > api_max) {
2141                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2142                           "Driver supports v%u, firmware is v%u.\n",
2143                           api_max, api_ver);
2144                 priv->ucode_ver = 0;
2145                 ret = -EINVAL;
2146                 goto err_release;
2147         }
2148         if (api_ver != api_max)
2149                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2150                           "got %u. New firmware can be obtained "
2151                           "from http://www.intellinuxwireless.org.\n",
2152                           api_max, api_ver);
2153
2154         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2155                 IWL_UCODE_MAJOR(priv->ucode_ver),
2156                 IWL_UCODE_MINOR(priv->ucode_ver),
2157                 IWL_UCODE_API(priv->ucode_ver),
2158                 IWL_UCODE_SERIAL(priv->ucode_ver));
2159
2160         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2161                        priv->ucode_ver);
2162         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2163                        inst_size);
2164         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2165                        data_size);
2166         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2167                        init_size);
2168         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2169                        init_data_size);
2170         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2171                        boot_size);
2172
2173
2174         /* Verify size of file vs. image size info in file's header */
2175         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2176                 inst_size + data_size + init_size +
2177                 init_data_size + boot_size) {
2178
2179                 IWL_DEBUG_INFO(priv,
2180                         "uCode file size %zd does not match expected size\n",
2181                         ucode_raw->size);
2182                 ret = -EINVAL;
2183                 goto err_release;
2184         }
2185
2186         /* Verify that uCode images will fit in card's SRAM */
2187         if (inst_size > IWL39_MAX_INST_SIZE) {
2188                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2189                                inst_size);
2190                 ret = -EINVAL;
2191                 goto err_release;
2192         }
2193
2194         if (data_size > IWL39_MAX_DATA_SIZE) {
2195                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2196                                data_size);
2197                 ret = -EINVAL;
2198                 goto err_release;
2199         }
2200         if (init_size > IWL39_MAX_INST_SIZE) {
2201                 IWL_DEBUG_INFO(priv,
2202                                 "uCode init instr len %d too large to fit in\n",
2203                                 init_size);
2204                 ret = -EINVAL;
2205                 goto err_release;
2206         }
2207         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2208                 IWL_DEBUG_INFO(priv,
2209                                 "uCode init data len %d too large to fit in\n",
2210                                 init_data_size);
2211                 ret = -EINVAL;
2212                 goto err_release;
2213         }
2214         if (boot_size > IWL39_MAX_BSM_SIZE) {
2215                 IWL_DEBUG_INFO(priv,
2216                                 "uCode boot instr len %d too large to fit in\n",
2217                                 boot_size);
2218                 ret = -EINVAL;
2219                 goto err_release;
2220         }
2221
2222         /* Allocate ucode buffers for card's bus-master loading ... */
2223
2224         /* Runtime instructions and 2 copies of data:
2225          * 1) unmodified from disk
2226          * 2) backup cache for save/restore during power-downs */
2227         priv->ucode_code.len = inst_size;
2228         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2229
2230         priv->ucode_data.len = data_size;
2231         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2232
2233         priv->ucode_data_backup.len = data_size;
2234         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2235
2236         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2237             !priv->ucode_data_backup.v_addr)
2238                 goto err_pci_alloc;
2239
2240         /* Initialization instructions and data */
2241         if (init_size && init_data_size) {
2242                 priv->ucode_init.len = init_size;
2243                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2244
2245                 priv->ucode_init_data.len = init_data_size;
2246                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2247
2248                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2249                         goto err_pci_alloc;
2250         }
2251
2252         /* Bootstrap (instructions only, no data) */
2253         if (boot_size) {
2254                 priv->ucode_boot.len = boot_size;
2255                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2256
2257                 if (!priv->ucode_boot.v_addr)
2258                         goto err_pci_alloc;
2259         }
2260
2261         /* Copy images into buffers for card's bus-master reads ... */
2262
2263         /* Runtime instructions (first block of data in file) */
2264         len = inst_size;
2265         IWL_DEBUG_INFO(priv,
2266                 "Copying (but not loading) uCode instr len %zd\n", len);
2267         memcpy(priv->ucode_code.v_addr, src, len);
2268         src += len;
2269
2270         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2271                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2272
2273         /* Runtime data (2nd block)
2274          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2275         len = data_size;
2276         IWL_DEBUG_INFO(priv,
2277                 "Copying (but not loading) uCode data len %zd\n", len);
2278         memcpy(priv->ucode_data.v_addr, src, len);
2279         memcpy(priv->ucode_data_backup.v_addr, src, len);
2280         src += len;
2281
2282         /* Initialization instructions (3rd block) */
2283         if (init_size) {
2284                 len = init_size;
2285                 IWL_DEBUG_INFO(priv,
2286                         "Copying (but not loading) init instr len %zd\n", len);
2287                 memcpy(priv->ucode_init.v_addr, src, len);
2288                 src += len;
2289         }
2290
2291         /* Initialization data (4th block) */
2292         if (init_data_size) {
2293                 len = init_data_size;
2294                 IWL_DEBUG_INFO(priv,
2295                         "Copying (but not loading) init data len %zd\n", len);
2296                 memcpy(priv->ucode_init_data.v_addr, src, len);
2297                 src += len;
2298         }
2299
2300         /* Bootstrap instructions (5th block) */
2301         len = boot_size;
2302         IWL_DEBUG_INFO(priv,
2303                 "Copying (but not loading) boot instr len %zd\n", len);
2304         memcpy(priv->ucode_boot.v_addr, src, len);
2305
2306         /* We have our copies now, allow OS release its copies */
2307         release_firmware(ucode_raw);
2308         return 0;
2309
2310  err_pci_alloc:
2311         IWL_ERR(priv, "failed to allocate pci memory\n");
2312         ret = -ENOMEM;
2313         iwl3945_dealloc_ucode_pci(priv);
2314
2315  err_release:
2316         release_firmware(ucode_raw);
2317
2318  error:
2319         return ret;
2320 }
2321
2322
2323 /**
2324  * iwl3945_set_ucode_ptrs - Set uCode address location
2325  *
2326  * Tell initialization uCode where to find runtime uCode.
2327  *
2328  * BSM registers initially contain pointers to initialization uCode.
2329  * We need to replace them to load runtime uCode inst and data,
2330  * and to save runtime data when powering down.
2331  */
2332 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2333 {
2334         dma_addr_t pinst;
2335         dma_addr_t pdata;
2336
2337         /* bits 31:0 for 3945 */
2338         pinst = priv->ucode_code.p_addr;
2339         pdata = priv->ucode_data_backup.p_addr;
2340
2341         /* Tell bootstrap uCode where to find image to load */
2342         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2343         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2344         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2345                                  priv->ucode_data.len);
2346
2347         /* Inst byte count must be last to set up, bit 31 signals uCode
2348          *   that all new ptr/size info is in place */
2349         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2350                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2351
2352         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2353
2354         return 0;
2355 }
2356
2357 /**
2358  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2359  *
2360  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2361  *
2362  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2363  */
2364 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2365 {
2366         /* Check alive response for "valid" sign from uCode */
2367         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2368                 /* We had an error bringing up the hardware, so take it
2369                  * all the way back down so we can try again */
2370                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2371                 goto restart;
2372         }
2373
2374         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2375          * This is a paranoid check, because we would not have gotten the
2376          * "initialize" alive if code weren't properly loaded.  */
2377         if (iwl3945_verify_ucode(priv)) {
2378                 /* Runtime instruction load was bad;
2379                  * take it all the way back down so we can try again */
2380                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2381                 goto restart;
2382         }
2383
2384         /* Send pointers to protocol/runtime uCode image ... init code will
2385          * load and launch runtime uCode, which will send us another "Alive"
2386          * notification. */
2387         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2388         if (iwl3945_set_ucode_ptrs(priv)) {
2389                 /* Runtime instruction load won't happen;
2390                  * take it all the way back down so we can try again */
2391                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2392                 goto restart;
2393         }
2394         return;
2395
2396  restart:
2397         queue_work(priv->workqueue, &priv->restart);
2398 }
2399
2400 /**
2401  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2402  *                   from protocol/runtime uCode (initialization uCode's
2403  *                   Alive gets handled by iwl3945_init_alive_start()).
2404  */
2405 static void iwl3945_alive_start(struct iwl_priv *priv)
2406 {
2407         int thermal_spin = 0;
2408         u32 rfkill;
2409
2410         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2411
2412         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2413                 /* We had an error bringing up the hardware, so take it
2414                  * all the way back down so we can try again */
2415                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2416                 goto restart;
2417         }
2418
2419         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2420          * This is a paranoid check, because we would not have gotten the
2421          * "runtime" alive if code weren't properly loaded.  */
2422         if (iwl3945_verify_ucode(priv)) {
2423                 /* Runtime instruction load was bad;
2424                  * take it all the way back down so we can try again */
2425                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2426                 goto restart;
2427         }
2428
2429         iwl_clear_stations_table(priv);
2430
2431         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2432         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2433
2434         if (rfkill & 0x1) {
2435                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2436                 /* if RFKILL is not on, then wait for thermal
2437                  * sensor in adapter to kick in */
2438                 while (iwl3945_hw_get_temperature(priv) == 0) {
2439                         thermal_spin++;
2440                         udelay(10);
2441                 }
2442
2443                 if (thermal_spin)
2444                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2445                                        thermal_spin * 10);
2446         } else
2447                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2448
2449         /* After the ALIVE response, we can send commands to 3945 uCode */
2450         set_bit(STATUS_ALIVE, &priv->status);
2451
2452         if (iwl_is_rfkill(priv))
2453                 return;
2454
2455         ieee80211_wake_queues(priv->hw);
2456
2457         priv->active_rate = priv->rates_mask;
2458         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2459
2460         iwl_power_update_mode(priv, false);
2461
2462         if (iwl_is_associated(priv)) {
2463                 struct iwl3945_rxon_cmd *active_rxon =
2464                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2465
2466                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2467                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2468         } else {
2469                 /* Initialize our rx_config data */
2470                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2471         }
2472
2473         /* Configure Bluetooth device coexistence support */
2474         iwl_send_bt_config(priv);
2475
2476         /* Configure the adapter for unassociated operation */
2477         iwlcore_commit_rxon(priv);
2478
2479         iwl3945_reg_txpower_periodic(priv);
2480
2481         iwl_leds_init(priv);
2482
2483         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2484         set_bit(STATUS_READY, &priv->status);
2485         wake_up_interruptible(&priv->wait_command_queue);
2486
2487         /* reassociate for ADHOC mode */
2488         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2489                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2490                                                                 priv->vif);
2491                 if (beacon)
2492                         iwl_mac_beacon_update(priv->hw, beacon);
2493         }
2494
2495         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2496                 iwl_set_mode(priv, priv->iw_mode);
2497
2498         return;
2499
2500  restart:
2501         queue_work(priv->workqueue, &priv->restart);
2502 }
2503
2504 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2505
2506 static void __iwl3945_down(struct iwl_priv *priv)
2507 {
2508         unsigned long flags;
2509         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2510         struct ieee80211_conf *conf = NULL;
2511
2512         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2513
2514         conf = ieee80211_get_hw_conf(priv->hw);
2515
2516         if (!exit_pending)
2517                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2518
2519         iwl_clear_stations_table(priv);
2520
2521         /* Unblock any waiting calls */
2522         wake_up_interruptible_all(&priv->wait_command_queue);
2523
2524         /* Wipe out the EXIT_PENDING status bit if we are not actually
2525          * exiting the module */
2526         if (!exit_pending)
2527                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2528
2529         /* stop and reset the on-board processor */
2530         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2531
2532         /* tell the device to stop sending interrupts */
2533         spin_lock_irqsave(&priv->lock, flags);
2534         iwl_disable_interrupts(priv);
2535         spin_unlock_irqrestore(&priv->lock, flags);
2536         iwl_synchronize_irq(priv);
2537
2538         if (priv->mac80211_registered)
2539                 ieee80211_stop_queues(priv->hw);
2540
2541         /* If we have not previously called iwl3945_init() then
2542          * clear all bits but the RF Kill bits and return */
2543         if (!iwl_is_init(priv)) {
2544                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2545                                         STATUS_RF_KILL_HW |
2546                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2547                                         STATUS_GEO_CONFIGURED |
2548                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2549                                         STATUS_EXIT_PENDING;
2550                 goto exit;
2551         }
2552
2553         /* ...otherwise clear out all the status bits but the RF Kill
2554          * bit and continue taking the NIC down. */
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_FW_ERROR, &priv->status) <<
2560                                 STATUS_FW_ERROR |
2561                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2562                                 STATUS_EXIT_PENDING;
2563
2564         iwl3945_hw_txq_ctx_stop(priv);
2565         iwl3945_hw_rxq_stop(priv);
2566
2567         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2568                                 APMG_CLK_VAL_DMA_CLK_RQT);
2569
2570         udelay(5);
2571
2572         /* Stop the device, and put it in low power state */
2573         priv->cfg->ops->lib->apm_ops.stop(priv);
2574
2575  exit:
2576         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2577
2578         if (priv->ibss_beacon)
2579                 dev_kfree_skb(priv->ibss_beacon);
2580         priv->ibss_beacon = NULL;
2581
2582         /* clear out any free frames */
2583         iwl3945_clear_free_frames(priv);
2584 }
2585
2586 static void iwl3945_down(struct iwl_priv *priv)
2587 {
2588         mutex_lock(&priv->mutex);
2589         __iwl3945_down(priv);
2590         mutex_unlock(&priv->mutex);
2591
2592         iwl3945_cancel_deferred_work(priv);
2593 }
2594
2595 #define MAX_HW_RESTARTS 5
2596
2597 static int __iwl3945_up(struct iwl_priv *priv)
2598 {
2599         int rc, i;
2600
2601         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2602                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2603                 return -EIO;
2604         }
2605
2606         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2607                 IWL_ERR(priv, "ucode not available for device bring up\n");
2608                 return -EIO;
2609         }
2610
2611         /* If platform's RF_KILL switch is NOT set to KILL */
2612         if (iwl_read32(priv, CSR_GP_CNTRL) &
2613                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2614                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2615         else {
2616                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2617                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2618                 return -ENODEV;
2619         }
2620
2621         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2622
2623         rc = iwl3945_hw_nic_init(priv);
2624         if (rc) {
2625                 IWL_ERR(priv, "Unable to int nic\n");
2626                 return rc;
2627         }
2628
2629         /* make sure rfkill handshake bits are cleared */
2630         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2631         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2632                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2633
2634         /* clear (again), then enable host interrupts */
2635         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2636         iwl_enable_interrupts(priv);
2637
2638         /* really make sure rfkill handshake bits are cleared */
2639         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2640         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2641
2642         /* Copy original ucode data image from disk into backup cache.
2643          * This will be used to initialize the on-board processor's
2644          * data SRAM for a clean start when the runtime program first loads. */
2645         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2646                priv->ucode_data.len);
2647
2648         /* We return success when we resume from suspend and rf_kill is on. */
2649         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2650                 return 0;
2651
2652         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2653
2654                 iwl_clear_stations_table(priv);
2655
2656                 /* load bootstrap state machine,
2657                  * load bootstrap program into processor's memory,
2658                  * prepare to load the "initialize" uCode */
2659                 priv->cfg->ops->lib->load_ucode(priv);
2660
2661                 if (rc) {
2662                         IWL_ERR(priv,
2663                                 "Unable to set up bootstrap uCode: %d\n", rc);
2664                         continue;
2665                 }
2666
2667                 /* start card; "initialize" will load runtime ucode */
2668                 iwl3945_nic_start(priv);
2669
2670                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2671
2672                 return 0;
2673         }
2674
2675         set_bit(STATUS_EXIT_PENDING, &priv->status);
2676         __iwl3945_down(priv);
2677         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2678
2679         /* tried to restart and config the device for as long as our
2680          * patience could withstand */
2681         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2682         return -EIO;
2683 }
2684
2685
2686 /*****************************************************************************
2687  *
2688  * Workqueue callbacks
2689  *
2690  *****************************************************************************/
2691
2692 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2693 {
2694         struct iwl_priv *priv =
2695             container_of(data, struct iwl_priv, init_alive_start.work);
2696
2697         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2698                 return;
2699
2700         mutex_lock(&priv->mutex);
2701         iwl3945_init_alive_start(priv);
2702         mutex_unlock(&priv->mutex);
2703 }
2704
2705 static void iwl3945_bg_alive_start(struct work_struct *data)
2706 {
2707         struct iwl_priv *priv =
2708             container_of(data, struct iwl_priv, alive_start.work);
2709
2710         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2711                 return;
2712
2713         mutex_lock(&priv->mutex);
2714         iwl3945_alive_start(priv);
2715         mutex_unlock(&priv->mutex);
2716 }
2717
2718 /*
2719  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2720  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2721  * *is* readable even when device has been SW_RESET into low power mode
2722  * (e.g. during RF KILL).
2723  */
2724 static void iwl3945_rfkill_poll(struct work_struct *data)
2725 {
2726         struct iwl_priv *priv =
2727             container_of(data, struct iwl_priv, rfkill_poll.work);
2728         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2729         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2730                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2731
2732         if (new_rfkill != old_rfkill) {
2733                 if (new_rfkill)
2734                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2735                 else
2736                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2737
2738                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2739
2740                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2741                                 new_rfkill ? "disable radio" : "enable radio");
2742         }
2743
2744         /* Keep this running, even if radio now enabled.  This will be
2745          * cancelled in mac_start() if system decides to start again */
2746         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2747                            round_jiffies_relative(2 * HZ));
2748
2749 }
2750
2751 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2752 static void iwl3945_bg_request_scan(struct work_struct *data)
2753 {
2754         struct iwl_priv *priv =
2755             container_of(data, struct iwl_priv, request_scan);
2756         struct iwl_host_cmd cmd = {
2757                 .id = REPLY_SCAN_CMD,
2758                 .len = sizeof(struct iwl3945_scan_cmd),
2759                 .flags = CMD_SIZE_HUGE,
2760         };
2761         int rc = 0;
2762         struct iwl3945_scan_cmd *scan;
2763         struct ieee80211_conf *conf = NULL;
2764         u8 n_probes = 0;
2765         enum ieee80211_band band;
2766         bool is_active = false;
2767
2768         conf = ieee80211_get_hw_conf(priv->hw);
2769
2770         mutex_lock(&priv->mutex);
2771
2772         cancel_delayed_work(&priv->scan_check);
2773
2774         if (!iwl_is_ready(priv)) {
2775                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2776                 goto done;
2777         }
2778
2779         /* Make sure the scan wasn't canceled before this queued work
2780          * was given the chance to run... */
2781         if (!test_bit(STATUS_SCANNING, &priv->status))
2782                 goto done;
2783
2784         /* This should never be called or scheduled if there is currently
2785          * a scan active in the hardware. */
2786         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2787                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2788                                 "Ignoring second request.\n");
2789                 rc = -EIO;
2790                 goto done;
2791         }
2792
2793         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2794                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2795                 goto done;
2796         }
2797
2798         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2799                 IWL_DEBUG_HC(priv,
2800                         "Scan request while abort pending. Queuing.\n");
2801                 goto done;
2802         }
2803
2804         if (iwl_is_rfkill(priv)) {
2805                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2806                 goto done;
2807         }
2808
2809         if (!test_bit(STATUS_READY, &priv->status)) {
2810                 IWL_DEBUG_HC(priv,
2811                         "Scan request while uninitialized. Queuing.\n");
2812                 goto done;
2813         }
2814
2815         if (!priv->scan_bands) {
2816                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2817                 goto done;
2818         }
2819
2820         if (!priv->scan) {
2821                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2822                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2823                 if (!priv->scan) {
2824                         rc = -ENOMEM;
2825                         goto done;
2826                 }
2827         }
2828         scan = priv->scan;
2829         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2830
2831         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2832         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2833
2834         if (iwl_is_associated(priv)) {
2835                 u16 interval = 0;
2836                 u32 extra;
2837                 u32 suspend_time = 100;
2838                 u32 scan_suspend_time = 100;
2839                 unsigned long flags;
2840
2841                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2842
2843                 spin_lock_irqsave(&priv->lock, flags);
2844                 interval = priv->beacon_int;
2845                 spin_unlock_irqrestore(&priv->lock, flags);
2846
2847                 scan->suspend_time = 0;
2848                 scan->max_out_time = cpu_to_le32(200 * 1024);
2849                 if (!interval)
2850                         interval = suspend_time;
2851                 /*
2852                  * suspend time format:
2853                  *  0-19: beacon interval in usec (time before exec.)
2854                  * 20-23: 0
2855                  * 24-31: number of beacons (suspend between channels)
2856                  */
2857
2858                 extra = (suspend_time / interval) << 24;
2859                 scan_suspend_time = 0xFF0FFFFF &
2860                     (extra | ((suspend_time % interval) * 1024));
2861
2862                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2863                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2864                                scan_suspend_time, interval);
2865         }
2866
2867         if (priv->scan_request->n_ssids) {
2868                 int i, p = 0;
2869                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2870                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2871                         /* always does wildcard anyway */
2872                         if (!priv->scan_request->ssids[i].ssid_len)
2873                                 continue;
2874                         scan->direct_scan[p].id = WLAN_EID_SSID;
2875                         scan->direct_scan[p].len =
2876                                 priv->scan_request->ssids[i].ssid_len;
2877                         memcpy(scan->direct_scan[p].ssid,
2878                                priv->scan_request->ssids[i].ssid,
2879                                priv->scan_request->ssids[i].ssid_len);
2880                         n_probes++;
2881                         p++;
2882                 }
2883                 is_active = true;
2884         } else
2885                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2886
2887         /* We don't build a direct scan probe request; the uCode will do
2888          * that based on the direct_mask added to each channel entry */
2889         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2890         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2891         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2892
2893         /* flags + rate selection */
2894
2895         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2896                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2897                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2898                 scan->good_CRC_th = 0;
2899                 band = IEEE80211_BAND_2GHZ;
2900         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2901                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2902                 /*
2903                  * If active scaning is requested but a certain channel
2904                  * is marked passive, we can do active scanning if we
2905                  * detect transmissions.
2906                  */
2907                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2908                 band = IEEE80211_BAND_5GHZ;
2909         } else {
2910                 IWL_WARN(priv, "Invalid scan band count\n");
2911                 goto done;
2912         }
2913
2914         scan->tx_cmd.len = cpu_to_le16(
2915                         iwl_fill_probe_req(priv,
2916                                 (struct ieee80211_mgmt *)scan->data,
2917                                 priv->scan_request->ie,
2918                                 priv->scan_request->ie_len,
2919                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2920
2921         /* select Rx antennas */
2922         scan->flags |= iwl3945_get_antenna_flags(priv);
2923
2924         if (iwl_is_monitor_mode(priv))
2925                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2926
2927         scan->channel_count =
2928                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2929                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2930
2931         if (scan->channel_count == 0) {
2932                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2933                 goto done;
2934         }
2935
2936         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2937             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2938         cmd.data = scan;
2939         scan->len = cpu_to_le16(cmd.len);
2940
2941         set_bit(STATUS_SCAN_HW, &priv->status);
2942         rc = iwl_send_cmd_sync(priv, &cmd);
2943         if (rc)
2944                 goto done;
2945
2946         queue_delayed_work(priv->workqueue, &priv->scan_check,
2947                            IWL_SCAN_CHECK_WATCHDOG);
2948
2949         mutex_unlock(&priv->mutex);
2950         return;
2951
2952  done:
2953         /* can not perform scan make sure we clear scanning
2954          * bits from status so next scan request can be performed.
2955          * if we dont clear scanning status bit here all next scan
2956          * will fail
2957         */
2958         clear_bit(STATUS_SCAN_HW, &priv->status);
2959         clear_bit(STATUS_SCANNING, &priv->status);
2960
2961         /* inform mac80211 scan aborted */
2962         queue_work(priv->workqueue, &priv->scan_completed);
2963         mutex_unlock(&priv->mutex);
2964 }
2965
2966 static void iwl3945_bg_up(struct work_struct *data)
2967 {
2968         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2969
2970         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2971                 return;
2972
2973         mutex_lock(&priv->mutex);
2974         __iwl3945_up(priv);
2975         mutex_unlock(&priv->mutex);
2976 }
2977
2978 static void iwl3945_bg_restart(struct work_struct *data)
2979 {
2980         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2981
2982         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2983                 return;
2984
2985         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2986                 mutex_lock(&priv->mutex);
2987                 priv->vif = NULL;
2988                 priv->is_open = 0;
2989                 mutex_unlock(&priv->mutex);
2990                 iwl3945_down(priv);
2991                 ieee80211_restart_hw(priv->hw);
2992         } else {
2993                 iwl3945_down(priv);
2994                 queue_work(priv->workqueue, &priv->up);
2995         }
2996 }
2997
2998 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2999 {
3000         struct iwl_priv *priv =
3001             container_of(data, struct iwl_priv, rx_replenish);
3002
3003         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3004                 return;
3005
3006         mutex_lock(&priv->mutex);
3007         iwl3945_rx_replenish(priv);
3008         mutex_unlock(&priv->mutex);
3009 }
3010
3011 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3012
3013 void iwl3945_post_associate(struct iwl_priv *priv)
3014 {
3015         int rc = 0;
3016         struct ieee80211_conf *conf = NULL;
3017
3018         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3019                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3020                 return;
3021         }
3022
3023
3024         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3025                         priv->assoc_id, priv->active_rxon.bssid_addr);
3026
3027         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3028                 return;
3029
3030         if (!priv->vif || !priv->is_open)
3031                 return;
3032
3033         iwl_scan_cancel_timeout(priv, 200);
3034
3035         conf = ieee80211_get_hw_conf(priv->hw);
3036
3037         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3038         iwlcore_commit_rxon(priv);
3039
3040         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3041         iwl_setup_rxon_timing(priv);
3042         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3043                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3044         if (rc)
3045                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3046                             "Attempting to continue.\n");
3047
3048         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3049
3050         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3051
3052         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3053                         priv->assoc_id, priv->beacon_int);
3054
3055         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3056                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3057         else
3058                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3059
3060         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3061                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3062                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3063                 else
3064                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3065
3066                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3067                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3068
3069         }
3070
3071         iwlcore_commit_rxon(priv);
3072
3073         switch (priv->iw_mode) {
3074         case NL80211_IFTYPE_STATION:
3075                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3076                 break;
3077
3078         case NL80211_IFTYPE_ADHOC:
3079
3080                 priv->assoc_id = 1;
3081                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3082                 iwl3945_sync_sta(priv, IWL_STA_ID,
3083                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3084                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3085                                  CMD_ASYNC);
3086                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3087                 iwl3945_send_beacon_cmd(priv);
3088
3089                 break;
3090
3091         default:
3092                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3093                            __func__, priv->iw_mode);
3094                 break;
3095         }
3096
3097         iwl_activate_qos(priv, 0);
3098
3099         /* we have just associated, don't start scan too early */
3100         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3101 }
3102
3103 /*****************************************************************************
3104  *
3105  * mac80211 entry point functions
3106  *
3107  *****************************************************************************/
3108
3109 #define UCODE_READY_TIMEOUT     (2 * HZ)
3110
3111 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3112 {
3113         struct iwl_priv *priv = hw->priv;
3114         int ret;
3115
3116         IWL_DEBUG_MAC80211(priv, "enter\n");
3117
3118         /* we should be verifying the device is ready to be opened */
3119         mutex_lock(&priv->mutex);
3120
3121         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3122          * ucode filename and max sizes are card-specific. */
3123
3124         if (!priv->ucode_code.len) {
3125                 ret = iwl3945_read_ucode(priv);
3126                 if (ret) {
3127                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3128                         mutex_unlock(&priv->mutex);
3129                         goto out_release_irq;
3130                 }
3131         }
3132
3133         ret = __iwl3945_up(priv);
3134
3135         mutex_unlock(&priv->mutex);
3136
3137         if (ret)
3138                 goto out_release_irq;
3139
3140         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3141
3142         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3143          * mac80211 will not be run successfully. */
3144         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3145                         test_bit(STATUS_READY, &priv->status),
3146                         UCODE_READY_TIMEOUT);
3147         if (!ret) {
3148                 if (!test_bit(STATUS_READY, &priv->status)) {
3149                         IWL_ERR(priv,
3150                                 "Wait for START_ALIVE timeout after %dms.\n",
3151                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3152                         ret = -ETIMEDOUT;
3153                         goto out_release_irq;
3154                 }
3155         }
3156
3157         /* ucode is running and will send rfkill notifications,
3158          * no need to poll the killswitch state anymore */
3159         cancel_delayed_work(&priv->rfkill_poll);
3160
3161         iwl_led_start(priv);
3162
3163         priv->is_open = 1;
3164         IWL_DEBUG_MAC80211(priv, "leave\n");
3165         return 0;
3166
3167 out_release_irq:
3168         priv->is_open = 0;
3169         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3170         return ret;
3171 }
3172
3173 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3174 {
3175         struct iwl_priv *priv = hw->priv;
3176
3177         IWL_DEBUG_MAC80211(priv, "enter\n");
3178
3179         if (!priv->is_open) {
3180                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3181                 return;
3182         }
3183
3184         priv->is_open = 0;
3185
3186         if (iwl_is_ready_rf(priv)) {
3187                 /* stop mac, cancel any scan request and clear
3188                  * RXON_FILTER_ASSOC_MSK BIT
3189                  */
3190                 mutex_lock(&priv->mutex);
3191                 iwl_scan_cancel_timeout(priv, 100);
3192                 mutex_unlock(&priv->mutex);
3193         }
3194
3195         iwl3945_down(priv);
3196
3197         flush_workqueue(priv->workqueue);
3198
3199         /* start polling the killswitch state again */
3200         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3201                            round_jiffies_relative(2 * HZ));
3202
3203         IWL_DEBUG_MAC80211(priv, "leave\n");
3204 }
3205
3206 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3207 {
3208         struct iwl_priv *priv = hw->priv;
3209
3210         IWL_DEBUG_MAC80211(priv, "enter\n");
3211
3212         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3213                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3214
3215         if (iwl3945_tx_skb(priv, skb))
3216                 dev_kfree_skb_any(skb);
3217
3218         IWL_DEBUG_MAC80211(priv, "leave\n");
3219         return NETDEV_TX_OK;
3220 }
3221
3222 void iwl3945_config_ap(struct iwl_priv *priv)
3223 {
3224         int rc = 0;
3225
3226         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3227                 return;
3228
3229         /* The following should be done only at AP bring up */
3230         if (!(iwl_is_associated(priv))) {
3231
3232                 /* RXON - unassoc (to set timing command) */
3233                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3234                 iwlcore_commit_rxon(priv);
3235
3236                 /* RXON Timing */
3237                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3238                 iwl_setup_rxon_timing(priv);
3239                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3240                                       sizeof(priv->rxon_timing),
3241                                       &priv->rxon_timing);
3242                 if (rc)
3243                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3244                                         "Attempting to continue.\n");
3245
3246                 /* FIXME: what should be the assoc_id for AP? */
3247                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3248                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3249                         priv->staging_rxon.flags |=
3250                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3251                 else
3252                         priv->staging_rxon.flags &=
3253                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3254
3255                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3256                         if (priv->assoc_capability &
3257                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3258                                 priv->staging_rxon.flags |=
3259                                         RXON_FLG_SHORT_SLOT_MSK;
3260                         else
3261                                 priv->staging_rxon.flags &=
3262                                         ~RXON_FLG_SHORT_SLOT_MSK;
3263
3264                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3265                                 priv->staging_rxon.flags &=
3266                                         ~RXON_FLG_SHORT_SLOT_MSK;
3267                 }
3268                 /* restore RXON assoc */
3269                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3270                 iwlcore_commit_rxon(priv);
3271                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3272         }
3273         iwl3945_send_beacon_cmd(priv);
3274
3275         /* FIXME - we need to add code here to detect a totally new
3276          * configuration, reset the AP, unassoc, rxon timing, assoc,
3277          * clear sta table, add BCAST sta... */
3278 }
3279
3280 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3281                                struct ieee80211_vif *vif,
3282                                struct ieee80211_sta *sta,
3283                                struct ieee80211_key_conf *key)
3284 {
3285         struct iwl_priv *priv = hw->priv;
3286         const u8 *addr;
3287         int ret = 0;
3288         u8 sta_id = IWL_INVALID_STATION;
3289         u8 static_key;
3290
3291         IWL_DEBUG_MAC80211(priv, "enter\n");
3292
3293         if (iwl3945_mod_params.sw_crypto) {
3294                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3295                 return -EOPNOTSUPP;
3296         }
3297
3298         addr = sta ? sta->addr : iwl_bcast_addr;
3299         static_key = !iwl_is_associated(priv);
3300
3301         if (!static_key) {
3302                 sta_id = iwl_find_station(priv, addr);
3303                 if (sta_id == IWL_INVALID_STATION) {
3304                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3305                                             addr);
3306                         return -EINVAL;
3307                 }
3308         }
3309
3310         mutex_lock(&priv->mutex);
3311         iwl_scan_cancel_timeout(priv, 100);
3312         mutex_unlock(&priv->mutex);
3313
3314         switch (cmd) {
3315         case SET_KEY:
3316                 if (static_key)
3317                         ret = iwl3945_set_static_key(priv, key);
3318                 else
3319                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3320                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3321                 break;
3322         case DISABLE_KEY:
3323                 if (static_key)
3324                         ret = iwl3945_remove_static_key(priv);
3325                 else
3326                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3327                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3328                 break;
3329         default:
3330                 ret = -EINVAL;
3331         }
3332
3333         IWL_DEBUG_MAC80211(priv, "leave\n");
3334
3335         return ret;
3336 }
3337
3338 /*****************************************************************************
3339  *
3340  * sysfs attributes
3341  *
3342  *****************************************************************************/
3343
3344 #ifdef CONFIG_IWLWIFI_DEBUG
3345
3346 /*
3347  * The following adds a new attribute to the sysfs representation
3348  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3349  * used for controlling the debug level.
3350  *
3351  * See the level definitions in iwl for details.
3352  *
3353  * The debug_level being managed using sysfs below is a per device debug
3354  * level that is used instead of the global debug level if it (the per
3355  * device debug level) is set.
3356  */
3357 static ssize_t show_debug_level(struct device *d,
3358                                 struct device_attribute *attr, char *buf)
3359 {
3360         struct iwl_priv *priv = dev_get_drvdata(d);
3361         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3362 }
3363 static ssize_t store_debug_level(struct device *d,
3364                                 struct device_attribute *attr,
3365                                  const char *buf, size_t count)
3366 {
3367         struct iwl_priv *priv = dev_get_drvdata(d);
3368         unsigned long val;
3369         int ret;
3370
3371         ret = strict_strtoul(buf, 0, &val);
3372         if (ret)
3373                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3374         else {
3375                 priv->debug_level = val;
3376                 if (iwl_alloc_traffic_mem(priv))
3377                         IWL_ERR(priv,
3378                                 "Not enough memory to generate traffic log\n");
3379         }
3380         return strnlen(buf, count);
3381 }
3382
3383 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3384                         show_debug_level, store_debug_level);
3385
3386 #endif /* CONFIG_IWLWIFI_DEBUG */
3387
3388 static ssize_t show_temperature(struct device *d,
3389                                 struct device_attribute *attr, char *buf)
3390 {
3391         struct iwl_priv *priv = dev_get_drvdata(d);
3392
3393         if (!iwl_is_alive(priv))
3394                 return -EAGAIN;
3395
3396         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3397 }
3398
3399 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3400
3401 static ssize_t show_tx_power(struct device *d,
3402                              struct device_attribute *attr, char *buf)
3403 {
3404         struct iwl_priv *priv = dev_get_drvdata(d);
3405         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3406 }
3407
3408 static ssize_t store_tx_power(struct device *d,
3409                               struct device_attribute *attr,
3410                               const char *buf, size_t count)
3411 {
3412         struct iwl_priv *priv = dev_get_drvdata(d);
3413         char *p = (char *)buf;
3414         u32 val;
3415
3416         val = simple_strtoul(p, &p, 10);
3417         if (p == buf)
3418                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3419         else
3420                 iwl3945_hw_reg_set_txpower(priv, val);
3421
3422         return count;
3423 }
3424
3425 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3426
3427 static ssize_t show_flags(struct device *d,
3428                           struct device_attribute *attr, char *buf)
3429 {
3430         struct iwl_priv *priv = dev_get_drvdata(d);
3431
3432         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3433 }
3434
3435 static ssize_t store_flags(struct device *d,
3436                            struct device_attribute *attr,
3437                            const char *buf, size_t count)
3438 {
3439         struct iwl_priv *priv = dev_get_drvdata(d);
3440         u32 flags = simple_strtoul(buf, NULL, 0);
3441
3442         mutex_lock(&priv->mutex);
3443         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3444                 /* Cancel any currently running scans... */
3445                 if (iwl_scan_cancel_timeout(priv, 100))
3446                         IWL_WARN(priv, "Could not cancel scan.\n");
3447                 else {
3448                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3449                                        flags);
3450                         priv->staging_rxon.flags = cpu_to_le32(flags);
3451                         iwlcore_commit_rxon(priv);
3452                 }
3453         }
3454         mutex_unlock(&priv->mutex);
3455
3456         return count;
3457 }
3458
3459 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3460
3461 static ssize_t show_filter_flags(struct device *d,
3462                                  struct device_attribute *attr, char *buf)
3463 {
3464         struct iwl_priv *priv = dev_get_drvdata(d);
3465
3466         return sprintf(buf, "0x%04X\n",
3467                 le32_to_cpu(priv->active_rxon.filter_flags));
3468 }
3469
3470 static ssize_t store_filter_flags(struct device *d,
3471                                   struct device_attribute *attr,
3472                                   const char *buf, size_t count)
3473 {
3474         struct iwl_priv *priv = dev_get_drvdata(d);
3475         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3476
3477         mutex_lock(&priv->mutex);
3478         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3479                 /* Cancel any currently running scans... */
3480                 if (iwl_scan_cancel_timeout(priv, 100))
3481                         IWL_WARN(priv, "Could not cancel scan.\n");
3482                 else {
3483                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3484                                        "0x%04X\n", filter_flags);
3485                         priv->staging_rxon.filter_flags =
3486                                 cpu_to_le32(filter_flags);
3487                         iwlcore_commit_rxon(priv);
3488                 }
3489         }
3490         mutex_unlock(&priv->mutex);
3491
3492         return count;
3493 }
3494
3495 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3496                    store_filter_flags);
3497
3498 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3499
3500 static ssize_t show_measurement(struct device *d,
3501                                 struct device_attribute *attr, char *buf)
3502 {
3503         struct iwl_priv *priv = dev_get_drvdata(d);
3504         struct iwl_spectrum_notification measure_report;
3505         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3506         u8 *data = (u8 *)&measure_report;
3507         unsigned long flags;
3508
3509         spin_lock_irqsave(&priv->lock, flags);
3510         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3511                 spin_unlock_irqrestore(&priv->lock, flags);
3512                 return 0;
3513         }
3514         memcpy(&measure_report, &priv->measure_report, size);
3515         priv->measurement_status = 0;
3516         spin_unlock_irqrestore(&priv->lock, flags);
3517
3518         while (size && (PAGE_SIZE - len)) {
3519                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3520                                    PAGE_SIZE - len, 1);
3521                 len = strlen(buf);
3522                 if (PAGE_SIZE - len)
3523                         buf[len++] = '\n';
3524
3525                 ofs += 16;
3526                 size -= min(size, 16U);
3527         }
3528
3529         return len;
3530 }
3531
3532 static ssize_t store_measurement(struct device *d,
3533                                  struct device_attribute *attr,
3534                                  const char *buf, size_t count)
3535 {
3536         struct iwl_priv *priv = dev_get_drvdata(d);
3537         struct ieee80211_measurement_params params = {
3538                 .channel = le16_to_cpu(priv->active_rxon.channel),
3539                 .start_time = cpu_to_le64(priv->last_tsf),
3540                 .duration = cpu_to_le16(1),
3541         };
3542         u8 type = IWL_MEASURE_BASIC;
3543         u8 buffer[32];
3544         u8 channel;
3545
3546         if (count) {
3547                 char *p = buffer;
3548                 strncpy(buffer, buf, min(sizeof(buffer), count));
3549                 channel = simple_strtoul(p, NULL, 0);
3550                 if (channel)
3551                         params.channel = channel;
3552
3553                 p = buffer;
3554                 while (*p && *p != ' ')
3555                         p++;
3556                 if (*p)
3557                         type = simple_strtoul(p + 1, NULL, 0);
3558         }
3559
3560         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3561                        "channel %d (for '%s')\n", type, params.channel, buf);
3562         iwl3945_get_measurement(priv, &params, type);
3563
3564         return count;
3565 }
3566
3567 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3568                    show_measurement, store_measurement);
3569 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3570
3571 static ssize_t store_retry_rate(struct device *d,
3572                                 struct device_attribute *attr,
3573                                 const char *buf, size_t count)
3574 {
3575         struct iwl_priv *priv = dev_get_drvdata(d);
3576
3577         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3578         if (priv->retry_rate <= 0)
3579                 priv->retry_rate = 1;
3580
3581         return count;
3582 }
3583
3584 static ssize_t show_retry_rate(struct device *d,
3585                                struct device_attribute *attr, char *buf)
3586 {
3587         struct iwl_priv *priv = dev_get_drvdata(d);
3588         return sprintf(buf, "%d", priv->retry_rate);
3589 }
3590
3591 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3592                    store_retry_rate);
3593
3594
3595 static ssize_t show_channels(struct device *d,
3596                              struct device_attribute *attr, char *buf)
3597 {
3598         /* all this shit doesn't belong into sysfs anyway */
3599         return 0;
3600 }
3601
3602 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3603
3604 static ssize_t show_statistics(struct device *d,
3605                                struct device_attribute *attr, char *buf)
3606 {
3607         struct iwl_priv *priv = dev_get_drvdata(d);
3608         u32 size = sizeof(struct iwl3945_notif_statistics);
3609         u32 len = 0, ofs = 0;
3610         u8 *data = (u8 *)&priv->statistics_39;
3611         int rc = 0;
3612
3613         if (!iwl_is_alive(priv))
3614                 return -EAGAIN;
3615
3616         mutex_lock(&priv->mutex);
3617         rc = iwl_send_statistics_request(priv, 0);
3618         mutex_unlock(&priv->mutex);
3619
3620         if (rc) {
3621                 len = sprintf(buf,
3622                               "Error sending statistics request: 0x%08X\n", rc);
3623                 return len;
3624         }
3625
3626         while (size && (PAGE_SIZE - len)) {
3627                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3628                                    PAGE_SIZE - len, 1);
3629                 len = strlen(buf);
3630                 if (PAGE_SIZE - len)
3631                         buf[len++] = '\n';
3632
3633                 ofs += 16;
3634                 size -= min(size, 16U);
3635         }
3636
3637         return len;
3638 }
3639
3640 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3641
3642 static ssize_t show_antenna(struct device *d,
3643                             struct device_attribute *attr, char *buf)
3644 {
3645         struct iwl_priv *priv = dev_get_drvdata(d);
3646
3647         if (!iwl_is_alive(priv))
3648                 return -EAGAIN;
3649
3650         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3651 }
3652
3653 static ssize_t store_antenna(struct device *d,
3654                              struct device_attribute *attr,
3655                              const char *buf, size_t count)
3656 {
3657         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3658         int ant;
3659
3660         if (count == 0)
3661                 return 0;
3662
3663         if (sscanf(buf, "%1i", &ant) != 1) {
3664                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3665                 return count;
3666         }
3667
3668         if ((ant >= 0) && (ant <= 2)) {
3669                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3670                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3671         } else
3672                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3673
3674
3675         return count;
3676 }
3677
3678 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3679
3680 static ssize_t show_status(struct device *d,
3681                            struct device_attribute *attr, char *buf)
3682 {
3683         struct iwl_priv *priv = dev_get_drvdata(d);
3684         if (!iwl_is_alive(priv))
3685                 return -EAGAIN;
3686         return sprintf(buf, "0x%08x\n", (int)priv->status);
3687 }
3688
3689 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3690
3691 static ssize_t dump_error_log(struct device *d,
3692                               struct device_attribute *attr,
3693                               const char *buf, size_t count)
3694 {
3695         struct iwl_priv *priv = dev_get_drvdata(d);
3696         char *p = (char *)buf;
3697
3698         if (p[0] == '1')
3699                 iwl3945_dump_nic_error_log(priv);
3700
3701         return strnlen(buf, count);
3702 }
3703
3704 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3705
3706 /*****************************************************************************
3707  *
3708  * driver setup and tear down
3709  *
3710  *****************************************************************************/
3711
3712 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3713 {
3714         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3715
3716         init_waitqueue_head(&priv->wait_command_queue);
3717
3718         INIT_WORK(&priv->up, iwl3945_bg_up);
3719         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3720         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3721         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3722         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3723         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3724         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3725         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3726         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3727         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3728         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3729
3730         iwl3945_hw_setup_deferred_work(priv);
3731
3732         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3733                      iwl3945_irq_tasklet, (unsigned long)priv);
3734 }
3735
3736 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3737 {
3738         iwl3945_hw_cancel_deferred_work(priv);
3739
3740         cancel_delayed_work_sync(&priv->init_alive_start);
3741         cancel_delayed_work(&priv->scan_check);
3742         cancel_delayed_work(&priv->alive_start);
3743         cancel_work_sync(&priv->beacon_update);
3744 }
3745
3746 static struct attribute *iwl3945_sysfs_entries[] = {
3747         &dev_attr_antenna.attr,
3748         &dev_attr_channels.attr,
3749         &dev_attr_dump_errors.attr,
3750         &dev_attr_flags.attr,
3751         &dev_attr_filter_flags.attr,
3752 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3753         &dev_attr_measurement.attr,
3754 #endif
3755         &dev_attr_retry_rate.attr,
3756         &dev_attr_statistics.attr,
3757         &dev_attr_status.attr,
3758         &dev_attr_temperature.attr,
3759         &dev_attr_tx_power.attr,
3760 #ifdef CONFIG_IWLWIFI_DEBUG
3761         &dev_attr_debug_level.attr,
3762 #endif
3763         NULL
3764 };
3765
3766 static struct attribute_group iwl3945_attribute_group = {
3767         .name = NULL,           /* put in device directory */
3768         .attrs = iwl3945_sysfs_entries,
3769 };
3770
3771 static struct ieee80211_ops iwl3945_hw_ops = {
3772         .tx = iwl3945_mac_tx,
3773         .start = iwl3945_mac_start,
3774         .stop = iwl3945_mac_stop,
3775         .add_interface = iwl_mac_add_interface,
3776         .remove_interface = iwl_mac_remove_interface,
3777         .config = iwl_mac_config,
3778         .configure_filter = iwl_configure_filter,
3779         .set_key = iwl3945_mac_set_key,
3780         .get_tx_stats = iwl_mac_get_tx_stats,
3781         .conf_tx = iwl_mac_conf_tx,
3782         .reset_tsf = iwl_mac_reset_tsf,
3783         .bss_info_changed = iwl_bss_info_changed,
3784         .hw_scan = iwl_mac_hw_scan
3785 };
3786
3787 static int iwl3945_init_drv(struct iwl_priv *priv)
3788 {
3789         int ret;
3790         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3791
3792         priv->retry_rate = 1;
3793         priv->ibss_beacon = NULL;
3794
3795         spin_lock_init(&priv->lock);
3796         spin_lock_init(&priv->sta_lock);
3797         spin_lock_init(&priv->hcmd_lock);
3798
3799         INIT_LIST_HEAD(&priv->free_frames);
3800
3801         mutex_init(&priv->mutex);
3802
3803         /* Clear the driver's (not device's) station table */
3804         iwl_clear_stations_table(priv);
3805
3806         priv->ieee_channels = NULL;
3807         priv->ieee_rates = NULL;
3808         priv->band = IEEE80211_BAND_2GHZ;
3809
3810         priv->iw_mode = NL80211_IFTYPE_STATION;
3811
3812         iwl_reset_qos(priv);
3813
3814         priv->qos_data.qos_active = 0;
3815         priv->qos_data.qos_cap.val = 0;
3816
3817         priv->rates_mask = IWL_RATES_MASK;
3818         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3819
3820         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3821                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3822                          eeprom->version);
3823                 ret = -EINVAL;
3824                 goto err;
3825         }
3826         ret = iwl_init_channel_map(priv);
3827         if (ret) {
3828                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3829                 goto err;
3830         }
3831
3832         /* Set up txpower settings in driver for all channels */
3833         if (iwl3945_txpower_set_from_eeprom(priv)) {
3834                 ret = -EIO;
3835                 goto err_free_channel_map;
3836         }
3837
3838         ret = iwlcore_init_geos(priv);
3839         if (ret) {
3840                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3841                 goto err_free_channel_map;
3842         }
3843         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3844
3845         return 0;
3846
3847 err_free_channel_map:
3848         iwl_free_channel_map(priv);
3849 err:
3850         return ret;
3851 }
3852
3853 static int iwl3945_setup_mac(struct iwl_priv *priv)
3854 {
3855         int ret;
3856         struct ieee80211_hw *hw = priv->hw;
3857
3858         hw->rate_control_algorithm = "iwl-3945-rs";
3859         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3860
3861         /* Tell mac80211 our characteristics */
3862         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3863                     IEEE80211_HW_NOISE_DBM |
3864                     IEEE80211_HW_SPECTRUM_MGMT |
3865                     IEEE80211_HW_SUPPORTS_PS |
3866                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3867
3868         hw->wiphy->interface_modes =
3869                 BIT(NL80211_IFTYPE_STATION) |
3870                 BIT(NL80211_IFTYPE_ADHOC);
3871
3872         hw->wiphy->custom_regulatory = true;
3873
3874         /* Firmware does not support this */
3875         hw->wiphy->disable_beacon_hints = true;
3876
3877         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3878         /* we create the 802.11 header and a zero-length SSID element */
3879         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3880
3881         /* Default value; 4 EDCA QOS priorities */
3882         hw->queues = 4;
3883
3884         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3885                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3886                         &priv->bands[IEEE80211_BAND_2GHZ];
3887
3888         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3889                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3890                         &priv->bands[IEEE80211_BAND_5GHZ];
3891
3892         ret = ieee80211_register_hw(priv->hw);
3893         if (ret) {
3894                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3895                 return ret;
3896         }
3897         priv->mac80211_registered = 1;
3898
3899         return 0;
3900 }
3901
3902 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3903 {
3904         int err = 0;
3905         struct iwl_priv *priv;
3906         struct ieee80211_hw *hw;
3907         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3908         struct iwl3945_eeprom *eeprom;
3909         unsigned long flags;
3910
3911         /***********************
3912          * 1. Allocating HW data
3913          * ********************/
3914
3915         /* mac80211 allocates memory for this device instance, including
3916          *   space for this driver's private structure */
3917         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3918         if (hw == NULL) {
3919                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3920                 err = -ENOMEM;
3921                 goto out;
3922         }
3923         priv = hw->priv;
3924         SET_IEEE80211_DEV(hw, &pdev->dev);
3925
3926         /*
3927          * Disabling hardware scan means that mac80211 will perform scans
3928          * "the hard way", rather than using device's scan.
3929          */
3930         if (iwl3945_mod_params.disable_hw_scan) {
3931                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3932                 iwl3945_hw_ops.hw_scan = NULL;
3933         }
3934
3935
3936         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3937         priv->cfg = cfg;
3938         priv->pci_dev = pdev;
3939         priv->inta_mask = CSR_INI_SET_MASK;
3940
3941 #ifdef CONFIG_IWLWIFI_DEBUG
3942         atomic_set(&priv->restrict_refcnt, 0);
3943 #endif
3944         if (iwl_alloc_traffic_mem(priv))
3945                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3946
3947         /***************************
3948          * 2. Initializing PCI bus
3949          * *************************/
3950         if (pci_enable_device(pdev)) {
3951                 err = -ENODEV;
3952                 goto out_ieee80211_free_hw;
3953         }
3954
3955         pci_set_master(pdev);
3956
3957         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3958         if (!err)
3959                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3960         if (err) {
3961                 IWL_WARN(priv, "No suitable DMA available.\n");
3962                 goto out_pci_disable_device;
3963         }
3964
3965         pci_set_drvdata(pdev, priv);
3966         err = pci_request_regions(pdev, DRV_NAME);
3967         if (err)
3968                 goto out_pci_disable_device;
3969
3970         /***********************
3971          * 3. Read REV Register
3972          * ********************/
3973         priv->hw_base = pci_iomap(pdev, 0, 0);
3974         if (!priv->hw_base) {
3975                 err = -ENODEV;
3976                 goto out_pci_release_regions;
3977         }
3978
3979         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3980                         (unsigned long long) pci_resource_len(pdev, 0));
3981         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3982
3983         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3984          * PCI Tx retries from interfering with C3 CPU state */
3985         pci_write_config_byte(pdev, 0x41, 0x00);
3986
3987         /* this spin lock will be used in apm_ops.init and EEPROM access
3988          * we should init now
3989          */
3990         spin_lock_init(&priv->reg_lock);
3991
3992         /* amp init */
3993         err = priv->cfg->ops->lib->apm_ops.init(priv);
3994         if (err < 0) {
3995                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3996                 goto out_iounmap;
3997         }
3998
3999         /***********************
4000          * 4. Read EEPROM
4001          * ********************/
4002
4003         /* Read the EEPROM */
4004         err = iwl_eeprom_init(priv);
4005         if (err) {
4006                 IWL_ERR(priv, "Unable to init EEPROM\n");
4007                 goto out_iounmap;
4008         }
4009         /* MAC Address location in EEPROM same for 3945/4965 */
4010         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4011         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4012         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4013         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4014
4015         /***********************
4016          * 5. Setup HW Constants
4017          * ********************/
4018         /* Device-specific setup */
4019         if (iwl3945_hw_set_hw_params(priv)) {
4020                 IWL_ERR(priv, "failed to set hw settings\n");
4021                 goto out_eeprom_free;
4022         }
4023
4024         /***********************
4025          * 6. Setup priv
4026          * ********************/
4027
4028         err = iwl3945_init_drv(priv);
4029         if (err) {
4030                 IWL_ERR(priv, "initializing driver failed\n");
4031                 goto out_unset_hw_params;
4032         }
4033
4034         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4035                 priv->cfg->name);
4036
4037         /***********************
4038          * 7. Setup Services
4039          * ********************/
4040
4041         spin_lock_irqsave(&priv->lock, flags);
4042         iwl_disable_interrupts(priv);
4043         spin_unlock_irqrestore(&priv->lock, flags);
4044
4045         pci_enable_msi(priv->pci_dev);
4046
4047         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4048                           IRQF_SHARED, DRV_NAME, priv);
4049         if (err) {
4050                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4051                 goto out_disable_msi;
4052         }
4053
4054         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4055         if (err) {
4056                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4057                 goto out_release_irq;
4058         }
4059
4060         iwl_set_rxon_channel(priv,
4061                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4062         iwl3945_setup_deferred_work(priv);
4063         iwl3945_setup_rx_handlers(priv);
4064         iwl_power_initialize(priv);
4065
4066         /*********************************
4067          * 8. Setup and Register mac80211
4068          * *******************************/
4069
4070         iwl_enable_interrupts(priv);
4071
4072         err = iwl3945_setup_mac(priv);
4073         if (err)
4074                 goto  out_remove_sysfs;
4075
4076         err = iwl_dbgfs_register(priv, DRV_NAME);
4077         if (err)
4078                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4079
4080         /* Start monitoring the killswitch */
4081         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4082                            2 * HZ);
4083
4084         return 0;
4085
4086  out_remove_sysfs:
4087         destroy_workqueue(priv->workqueue);
4088         priv->workqueue = NULL;
4089         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4090  out_release_irq:
4091         free_irq(priv->pci_dev->irq, priv);
4092  out_disable_msi:
4093         pci_disable_msi(priv->pci_dev);
4094         iwlcore_free_geos(priv);
4095         iwl_free_channel_map(priv);
4096  out_unset_hw_params:
4097         iwl3945_unset_hw_params(priv);
4098  out_eeprom_free:
4099         iwl_eeprom_free(priv);
4100  out_iounmap:
4101         pci_iounmap(pdev, priv->hw_base);
4102  out_pci_release_regions:
4103         pci_release_regions(pdev);
4104  out_pci_disable_device:
4105         pci_set_drvdata(pdev, NULL);
4106         pci_disable_device(pdev);
4107  out_ieee80211_free_hw:
4108         iwl_free_traffic_mem(priv);
4109         ieee80211_free_hw(priv->hw);
4110  out:
4111         return err;
4112 }
4113
4114 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4115 {
4116         struct iwl_priv *priv = pci_get_drvdata(pdev);
4117         unsigned long flags;
4118
4119         if (!priv)
4120                 return;
4121
4122         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4123
4124         iwl_dbgfs_unregister(priv);
4125
4126         set_bit(STATUS_EXIT_PENDING, &priv->status);
4127
4128         if (priv->mac80211_registered) {
4129                 ieee80211_unregister_hw(priv->hw);
4130                 priv->mac80211_registered = 0;
4131         } else {
4132                 iwl3945_down(priv);
4133         }
4134
4135         /* make sure we flush any pending irq or
4136          * tasklet for the driver
4137          */
4138         spin_lock_irqsave(&priv->lock, flags);
4139         iwl_disable_interrupts(priv);
4140         spin_unlock_irqrestore(&priv->lock, flags);
4141
4142         iwl_synchronize_irq(priv);
4143
4144         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4145
4146         cancel_delayed_work_sync(&priv->rfkill_poll);
4147
4148         iwl3945_dealloc_ucode_pci(priv);
4149
4150         if (priv->rxq.bd)
4151                 iwl3945_rx_queue_free(priv, &priv->rxq);
4152         iwl3945_hw_txq_ctx_free(priv);
4153
4154         iwl3945_unset_hw_params(priv);
4155         iwl_clear_stations_table(priv);
4156
4157         /*netif_stop_queue(dev); */
4158         flush_workqueue(priv->workqueue);
4159
4160         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4161          * priv->workqueue... so we can't take down the workqueue
4162          * until now... */
4163         destroy_workqueue(priv->workqueue);
4164         priv->workqueue = NULL;
4165         iwl_free_traffic_mem(priv);
4166
4167         free_irq(pdev->irq, priv);
4168         pci_disable_msi(pdev);
4169
4170         pci_iounmap(pdev, priv->hw_base);
4171         pci_release_regions(pdev);
4172         pci_disable_device(pdev);
4173         pci_set_drvdata(pdev, NULL);
4174
4175         iwl_free_channel_map(priv);
4176         iwlcore_free_geos(priv);
4177         kfree(priv->scan);
4178         if (priv->ibss_beacon)
4179                 dev_kfree_skb(priv->ibss_beacon);
4180
4181         ieee80211_free_hw(priv->hw);
4182 }
4183
4184
4185 /*****************************************************************************
4186  *
4187  * driver and module entry point
4188  *
4189  *****************************************************************************/
4190
4191 static struct pci_driver iwl3945_driver = {
4192         .name = DRV_NAME,
4193         .id_table = iwl3945_hw_card_ids,
4194         .probe = iwl3945_pci_probe,
4195         .remove = __devexit_p(iwl3945_pci_remove),
4196 #ifdef CONFIG_PM
4197         .suspend = iwl_pci_suspend,
4198         .resume = iwl_pci_resume,
4199 #endif
4200 };
4201
4202 static int __init iwl3945_init(void)
4203 {
4204
4205         int ret;
4206         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4207         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4208
4209         ret = iwl3945_rate_control_register();
4210         if (ret) {
4211                 printk(KERN_ERR DRV_NAME
4212                        "Unable to register rate control algorithm: %d\n", ret);
4213                 return ret;
4214         }
4215
4216         ret = pci_register_driver(&iwl3945_driver);
4217         if (ret) {
4218                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4219                 goto error_register;
4220         }
4221
4222         return ret;
4223
4224 error_register:
4225         iwl3945_rate_control_unregister();
4226         return ret;
4227 }
4228
4229 static void __exit iwl3945_exit(void)
4230 {
4231         pci_unregister_driver(&iwl3945_driver);
4232         iwl3945_rate_control_unregister();
4233 }
4234
4235 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4236
4237 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4238 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4239 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4240 MODULE_PARM_DESC(swcrypto,
4241                  "using software crypto (default 1 [software])\n");
4242 #ifdef CONFIG_IWLWIFI_DEBUG
4243 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4244 MODULE_PARM_DESC(debug, "debug output mask");
4245 #endif
4246 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4247                    int, S_IRUGO);
4248 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4249 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4250 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4251
4252 module_exit(iwl3945_exit);
4253 module_init(iwl3945_init);