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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  99  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 100  * @priv: eeprom and antenna fields are used to determine antenna flags
 101  *
 102  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 103  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 104  *
 105  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 106  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 107  * IWL_ANTENNA_AUX       - Force AUX antenna
 108  */
 109 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 110 {
 111         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 112
 113         switch (iwl3945_mod_params.antenna) {
 114         case IWL_ANTENNA_DIVERSITY:
 115                 return 0;
 116
 117         case IWL_ANTENNA_MAIN:
 118                 if (eeprom->antenna_switch_type)
 119                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 120                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 121
 122         case IWL_ANTENNA_AUX:
 123                 if (eeprom->antenna_switch_type)
 124                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 125                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 126         }
 127
 128         /* bad antenna selector value */
 129         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 130                 iwl3945_mod_params.antenna);
 131
 132         return 0;               /* "diversity" is default if error */
 133 }
 134
 135 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 136                                    struct ieee80211_key_conf *keyconf,
 137                                    u8 sta_id)
 138 {
 139         unsigned long flags;
 140         __le16 key_flags = 0;
 141         int ret;
 142
 143         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 144         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 145
 146         if (sta_id == priv->hw_params.bcast_sta_id)
 147                 key_flags |= STA_KEY_MULTICAST_MSK;
 148
 149         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 150         keyconf->hw_key_idx = keyconf->keyidx;
 151         key_flags &= ~STA_KEY_FLG_INVALID;
 152
 153         spin_lock_irqsave(&priv->sta_lock, flags);
 154         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 155         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 156         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 160                keyconf->keylen);
 161
 162         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 163                         == STA_KEY_FLG_NO_ENC)
 164                 priv->stations[sta_id].sta.key.key_offset =
 165                                  iwl_get_free_ucode_key_index(priv);
 166         /* else, we are overriding an existing key => no need to allocated room
 167         * in uCode. */
 168
 169         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 170                 "no space for a new key");
 171
 172         priv->stations[sta_id].sta.key.key_flags = key_flags;
 173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 175
 176         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 177
 178         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 179
 180         spin_unlock_irqrestore(&priv->sta_lock, flags);
 181
 182         return ret;
 183 }
 184
 185 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 186                                   struct ieee80211_key_conf *keyconf,
 187                                   u8 sta_id)
 188 {
 189         return -EOPNOTSUPP;
 190 }
 191
 192 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 193                                   struct ieee80211_key_conf *keyconf,
 194                                   u8 sta_id)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 200 {
 201         unsigned long flags;
 202
 203         spin_lock_irqsave(&priv->sta_lock, flags);
 204         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 205         memset(&priv->stations[sta_id].sta.key, 0,
 206                 sizeof(struct iwl4965_keyinfo));
 207         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 208         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 209         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 210         spin_unlock_irqrestore(&priv->sta_lock, flags);
 211
 212         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 213         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 214         return 0;
 215 }
 216
 217 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 218                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 219 {
 220         int ret = 0;
 221
 222         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 223
 224         switch (keyconf->alg) {
 225         case ALG_CCMP:
 226                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_TKIP:
 229                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case ALG_WEP:
 232                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         default:
 235                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 236                 ret = -EINVAL;
 237         }
 238
 239         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 240                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 241                       sta_id, ret);
 242
 243         return ret;
 244 }
 245
 246 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 247 {
 248         int ret = -EOPNOTSUPP;
 249
 250         return ret;
 251 }
 252
 253 static int iwl3945_set_static_key(struct iwl_priv *priv,
 254                                 struct ieee80211_key_conf *key)
 255 {
 256         if (key->alg == ALG_WEP)
 257                 return -EOPNOTSUPP;
 258
 259         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 260         return -EINVAL;
 261 }
 262
 263 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 264 {
 265         struct list_head *element;
 266
 267         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 268                        priv->frames_count);
 269
 270         while (!list_empty(&priv->free_frames)) {
 271                 element = priv->free_frames.next;
 272                 list_del(element);
 273                 kfree(list_entry(element, struct iwl3945_frame, list));
 274                 priv->frames_count--;
 275         }
 276
 277         if (priv->frames_count) {
 278                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 279                             priv->frames_count);
 280                 priv->frames_count = 0;
 281         }
 282 }
 283
 284 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 285 {
 286         struct iwl3945_frame *frame;
 287         struct list_head *element;
 288         if (list_empty(&priv->free_frames)) {
 289                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 290                 if (!frame) {
 291                         IWL_ERR(priv, "Could not allocate frame!\n");
 292                         return NULL;
 293                 }
 294
 295                 priv->frames_count++;
 296                 return frame;
 297         }
 298
 299         element = priv->free_frames.next;
 300         list_del(element);
 301         return list_entry(element, struct iwl3945_frame, list);
 302 }
 303
 304 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 305 {
 306         memset(frame, 0, sizeof(*frame));
 307         list_add(&frame->list, &priv->free_frames);
 308 }
 309
 310 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 311                                 struct ieee80211_hdr *hdr,
 312                                 int left)
 313 {
 314
 315         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 316             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 317              (priv->iw_mode != NL80211_IFTYPE_AP)))
 318                 return 0;
 319
 320         if (priv->ibss_beacon->len > left)
 321                 return 0;
 322
 323         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 324
 325         return priv->ibss_beacon->len;
 326 }
 327
 328 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 329 {
 330         struct iwl3945_frame *frame;
 331         unsigned int frame_size;
 332         int rc;
 333         u8 rate;
 334
 335         frame = iwl3945_get_free_frame(priv);
 336
 337         if (!frame) {
 338                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 339                           "command.\n");
 340                 return -ENOMEM;
 341         }
 342
 343         rate = iwl_rate_get_lowest_plcp(priv);
 344
 345         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 346
 347         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 348                               &frame->u.cmd[0]);
 349
 350         iwl3945_free_frame(priv, frame);
 351
 352         return rc;
 353 }
 354
 355 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 356 {
 357         if (priv->shared_virt)
 358                 pci_free_consistent(priv->pci_dev,
 359                                     sizeof(struct iwl3945_shared),
 360                                     priv->shared_virt,
 361                                     priv->shared_phys);
 362 }
 363
 364 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 365                                       struct ieee80211_tx_info *info,
 366                                       struct iwl_device_cmd *cmd,
 367                                       struct sk_buff *skb_frag,
 368                                       int sta_id)
 369 {
 370         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 371         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 372
 373         switch (keyinfo->alg) {
 374         case ALG_CCMP:
 375                 tx->sec_ctl = TX_CMD_SEC_CCM;
 376                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 377                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 378                 break;
 379
 380         case ALG_TKIP:
 381                 break;
 382
 383         case ALG_WEP:
 384                 tx->sec_ctl = TX_CMD_SEC_WEP |
 385                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 386
 387                 if (keyinfo->keylen == 13)
 388                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 389
 390                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 391
 392                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 393                              "with key %d\n", info->control.hw_key->hw_key_idx);
 394                 break;
 395
 396         default:
 397                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 398                 break;
 399         }
 400 }
 401
 402 /*
 403  * handle build REPLY_TX command notification.
 404  */
 405 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 406                                   struct iwl_device_cmd *cmd,
 407                                   struct ieee80211_tx_info *info,
 408                                   struct ieee80211_hdr *hdr, u8 std_id)
 409 {
 410         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 411         __le32 tx_flags = tx->tx_flags;
 412         __le16 fc = hdr->frame_control;
 413         u8 rc_flags = info->control.rates[0].flags;
 414
 415         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 416         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 417                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 418                 if (ieee80211_is_mgmt(fc))
 419                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 420                 if (ieee80211_is_probe_resp(fc) &&
 421                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 422                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 423         } else {
 424                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 425                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426         }
 427
 428         tx->sta_id = std_id;
 429         if (ieee80211_has_morefrags(fc))
 430                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 431
 432         if (ieee80211_is_data_qos(fc)) {
 433                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 434                 tx->tid_tspec = qc[0] & 0xf;
 435                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 436         } else {
 437                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 438         }
 439
 440         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 441                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 442                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 443         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 444                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 445                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 446         }
 447
 448         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 449                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 450
 451         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 452         if (ieee80211_is_mgmt(fc)) {
 453                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 454                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 455                 else
 456                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 457         } else {
 458                 tx->timeout.pm_frame_timeout = 0;
 459 #ifdef CONFIG_IWLWIFI_LEDS
 460                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 461 #endif
 462         }
 463
 464         tx->driver_txop = 0;
 465         tx->tx_flags = tx_flags;
 466         tx->next_frame_len = 0;
 467 }
 468
 469 /*
 470  * start REPLY_TX command process
 471  */
 472 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 473 {
 474         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 475         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 476         struct iwl3945_tx_cmd *tx;
 477         struct iwl_tx_queue *txq = NULL;
 478         struct iwl_queue *q = NULL;
 479         struct iwl_device_cmd *out_cmd;
 480         struct iwl_cmd_meta *out_meta;
 481         dma_addr_t phys_addr;
 482         dma_addr_t txcmd_phys;
 483         int txq_id = skb_get_queue_mapping(skb);
 484         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 485         u8 id;
 486         u8 unicast;
 487         u8 sta_id;
 488         u8 tid = 0;
 489         u16 seq_number = 0;
 490         __le16 fc;
 491         u8 wait_write_ptr = 0;
 492         u8 *qc = NULL;
 493         unsigned long flags;
 494         int rc;
 495
 496         spin_lock_irqsave(&priv->lock, flags);
 497         if (iwl_is_rfkill(priv)) {
 498                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 499                 goto drop_unlock;
 500         }
 501
 502         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 503                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 504                 goto drop_unlock;
 505         }
 506
 507         unicast = !is_multicast_ether_addr(hdr->addr1);
 508         id = 0;
 509
 510         fc = hdr->frame_control;
 511
 512 #ifdef CONFIG_IWLWIFI_DEBUG
 513         if (ieee80211_is_auth(fc))
 514                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 515         else if (ieee80211_is_assoc_req(fc))
 516                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 517         else if (ieee80211_is_reassoc_req(fc))
 518                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 519 #endif
 520
 521         /* drop all data frame if we are not associated */
 522         if (ieee80211_is_data(fc) &&
 523             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 524             (!iwl_is_associated(priv) ||
 525              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 526                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 527                 goto drop_unlock;
 528         }
 529
 530         spin_unlock_irqrestore(&priv->lock, flags);
 531
 532         hdr_len = ieee80211_hdrlen(fc);
 533
 534         /* Find (or create) index into station table for destination station */
 535         sta_id = iwl_get_sta_id(priv, hdr);
 536         if (sta_id == IWL_INVALID_STATION) {
 537                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 538                                hdr->addr1);
 539                 goto drop;
 540         }
 541
 542         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 543
 544         if (ieee80211_is_data_qos(fc)) {
 545                 qc = ieee80211_get_qos_ctl(hdr);
 546                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 547                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 548                                 IEEE80211_SCTL_SEQ;
 549                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 550                         (hdr->seq_ctrl &
 551                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 552                 seq_number += 0x10;
 553         }
 554
 555         /* Descriptor for chosen Tx queue */
 556         txq = &priv->txq[txq_id];
 557         q = &txq->q;
 558
 559         spin_lock_irqsave(&priv->lock, flags);
 560
 561         idx = get_cmd_index(q, q->write_ptr, 0);
 562
 563         /* Set up driver data for this TFD */
 564         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 565         txq->txb[q->write_ptr].skb[0] = skb;
 566
 567         /* Init first empty entry in queue's array of Tx/cmd buffers */
 568         out_cmd = txq->cmd[idx];
 569         out_meta = &txq->meta[idx];
 570         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 571         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 572         memset(tx, 0, sizeof(*tx));
 573
 574         /*
 575          * Set up the Tx-command (not MAC!) header.
 576          * Store the chosen Tx queue and TFD index within the sequence field;
 577          * after Tx, uCode's Tx response will return this value so driver can
 578          * locate the frame within the tx queue and do post-tx processing.
 579          */
 580         out_cmd->hdr.cmd = REPLY_TX;
 581         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 582                                 INDEX_TO_SEQ(q->write_ptr)));
 583
 584         /* Copy MAC header from skb into command buffer */
 585         memcpy(tx->hdr, hdr, hdr_len);
 586
 587
 588         if (info->control.hw_key)
 589                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 590
 591         /* TODO need this for burst mode later on */
 592         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 593
 594         /* set is_hcca to 0; it probably will never be implemented */
 595         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 596
 597         /* Total # bytes to be transmitted */
 598         len = (u16)skb->len;
 599         tx->len = cpu_to_le16(len);
 600
 601
 602         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 603         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 604
 605         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 606                 txq->need_update = 1;
 607                 if (qc)
 608                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 609         } else {
 610                 wait_write_ptr = 1;
 611                 txq->need_update = 0;
 612         }
 613
 614         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 615                      le16_to_cpu(out_cmd->hdr.sequence));
 616         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 617         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 618         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 619                            ieee80211_hdrlen(fc));
 620
 621         /*
 622          * Use the first empty entry in this queue's command buffer array
 623          * to contain the Tx command and MAC header concatenated together
 624          * (payload data will be in another buffer).
 625          * Size of this varies, due to varying MAC header length.
 626          * If end is not dword aligned, we'll have 2 extra bytes at the end
 627          * of the MAC header (device reads on dword boundaries).
 628          * We'll tell device about this padding later.
 629          */
 630         len = sizeof(struct iwl3945_tx_cmd) +
 631                         sizeof(struct iwl_cmd_header) + hdr_len;
 632
 633         len_org = len;
 634         len = (len + 3) & ~3;
 635
 636         if (len_org != len)
 637                 len_org = 1;
 638         else
 639                 len_org = 0;
 640
 641         /* Physical address of this Tx command's header (not MAC header!),
 642          * within command buffer array. */
 643         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 644                                     len, PCI_DMA_TODEVICE);
 645         /* we do not map meta data ... so we can safely access address to
 646          * provide to unmap command*/
 647         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 648         pci_unmap_len_set(out_meta, len, len);
 649
 650         /* Add buffer containing Tx command and MAC(!) header to TFD's
 651          * first entry */
 652         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 653                                                    txcmd_phys, len, 1, 0);
 654
 655
 656         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 657          * if any (802.11 null frames have no payload). */
 658         len = skb->len - hdr_len;
 659         if (len) {
 660                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 661                                            len, PCI_DMA_TODEVICE);
 662                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 663                                                            phys_addr, len,
 664                                                            0, U32_PAD(len));
 665         }
 666
 667
 668         /* Tell device the write index *just past* this latest filled TFD */
 669         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 670         rc = iwl_txq_update_write_ptr(priv, txq);
 671         spin_unlock_irqrestore(&priv->lock, flags);
 672
 673         if (rc)
 674                 return rc;
 675
 676         if ((iwl_queue_space(q) < q->high_mark)
 677             && priv->mac80211_registered) {
 678                 if (wait_write_ptr) {
 679                         spin_lock_irqsave(&priv->lock, flags);
 680                         txq->need_update = 1;
 681                         iwl_txq_update_write_ptr(priv, txq);
 682                         spin_unlock_irqrestore(&priv->lock, flags);
 683                 }
 684
 685                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 686         }
 687
 688         return 0;
 689
 690 drop_unlock:
 691         spin_unlock_irqrestore(&priv->lock, flags);
 692 drop:
 693         return -1;
 694 }
 695
 696 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 697
 698 #include "iwl-spectrum.h"
 699
 700 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 701 #define BEACON_TIME_MASK_HIGH   0xFF000000
 702 #define TIME_UNIT               1024
 703
 704 /*
 705  * extended beacon time format
 706  * time in usec will be changed into a 32-bit value in 8:24 format
 707  * the high 1 byte is the beacon counts
 708  * the lower 3 bytes is the time in usec within one beacon interval
 709  */
 710
 711 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 712 {
 713         u32 quot;
 714         u32 rem;
 715         u32 interval = beacon_interval * 1024;
 716
 717         if (!interval || !usec)
 718                 return 0;
 719
 720         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 721         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 722
 723         return (quot << 24) + rem;
 724 }
 725
 726 /* base is usually what we get from ucode with each received frame,
 727  * the same as HW timer counter counting down
 728  */
 729
 730 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 731 {
 732         u32 base_low = base & BEACON_TIME_MASK_LOW;
 733         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 734         u32 interval = beacon_interval * TIME_UNIT;
 735         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 736             (addon & BEACON_TIME_MASK_HIGH);
 737
 738         if (base_low > addon_low)
 739                 res += base_low - addon_low;
 740         else if (base_low < addon_low) {
 741                 res += interval + base_low - addon_low;
 742                 res += (1 << 24);
 743         } else
 744                 res += (1 << 24);
 745
 746         return cpu_to_le32(res);
 747 }
 748
 749 static int iwl3945_get_measurement(struct iwl_priv *priv,
 750                                struct ieee80211_measurement_params *params,
 751                                u8 type)
 752 {
 753         struct iwl_spectrum_cmd spectrum;
 754         struct iwl_rx_packet *res;
 755         struct iwl_host_cmd cmd = {
 756                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 757                 .data = (void *)&spectrum,
 758                 .flags = CMD_WANT_SKB,
 759         };
 760         u32 add_time = le64_to_cpu(params->start_time);
 761         int rc;
 762         int spectrum_resp_status;
 763         int duration = le16_to_cpu(params->duration);
 764
 765         if (iwl_is_associated(priv))
 766                 add_time =
 767                     iwl3945_usecs_to_beacons(
 768                         le64_to_cpu(params->start_time) - priv->last_tsf,
 769                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 770
 771         memset(&spectrum, 0, sizeof(spectrum));
 772
 773         spectrum.channel_count = cpu_to_le16(1);
 774         spectrum.flags =
 775             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 776         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 777         cmd.len = sizeof(spectrum);
 778         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 779
 780         if (iwl_is_associated(priv))
 781                 spectrum.start_time =
 782                     iwl3945_add_beacon_time(priv->last_beacon_time,
 783                                 add_time,
 784                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 785         else
 786                 spectrum.start_time = 0;
 787
 788         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 789         spectrum.channels[0].channel = params->channel;
 790         spectrum.channels[0].type = type;
 791         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 792                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 793                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 794
 795         rc = iwl_send_cmd_sync(priv, &cmd);
 796         if (rc)
 797                 return rc;
 798
 799         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 800         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 801                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 802                 rc = -EIO;
 803         }
 804
 805         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 806         switch (spectrum_resp_status) {
 807         case 0:         /* Command will be handled */
 808                 if (res->u.spectrum.id != 0xff) {
 809                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 810                                                 res->u.spectrum.id);
 811                         priv->measurement_status &= ~MEASUREMENT_READY;
 812                 }
 813                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 814                 rc = 0;
 815                 break;
 816
 817         case 1:         /* Command will not be handled */
 818                 rc = -EAGAIN;
 819                 break;
 820         }
 821
 822         dev_kfree_skb_any(cmd.reply_skb);
 823
 824         return rc;
 825 }
 826 #endif
 827
 828 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 829                                struct iwl_rx_mem_buffer *rxb)
 830 {
 831         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 832         struct iwl_alive_resp *palive;
 833         struct delayed_work *pwork;
 834
 835         palive = &pkt->u.alive_frame;
 836
 837         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 838                        "0x%01X 0x%01X\n",
 839                        palive->is_valid, palive->ver_type,
 840                        palive->ver_subtype);
 841
 842         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 843                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 844                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 845                        sizeof(struct iwl_alive_resp));
 846                 pwork = &priv->init_alive_start;
 847         } else {
 848                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 849                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 850                        sizeof(struct iwl_alive_resp));
 851                 pwork = &priv->alive_start;
 852                 iwl3945_disable_events(priv);
 853         }
 854
 855         /* We delay the ALIVE response by 5ms to
 856          * give the HW RF Kill time to activate... */
 857         if (palive->is_valid == UCODE_VALID_OK)
 858                 queue_delayed_work(priv->workqueue, pwork,
 859                                    msecs_to_jiffies(5));
 860         else
 861                 IWL_WARN(priv, "uCode did not respond OK.\n");
 862 }
 863
 864 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 865                                  struct iwl_rx_mem_buffer *rxb)
 866 {
 867 #ifdef CONFIG_IWLWIFI_DEBUG
 868         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 869 #endif
 870
 871         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 872         return;
 873 }
 874
 875 static void iwl3945_bg_beacon_update(struct work_struct *work)
 876 {
 877         struct iwl_priv *priv =
 878                 container_of(work, struct iwl_priv, beacon_update);
 879         struct sk_buff *beacon;
 880
 881         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 882         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 883
 884         if (!beacon) {
 885                 IWL_ERR(priv, "update beacon failed\n");
 886                 return;
 887         }
 888
 889         mutex_lock(&priv->mutex);
 890         /* new beacon skb is allocated every time; dispose previous.*/
 891         if (priv->ibss_beacon)
 892                 dev_kfree_skb(priv->ibss_beacon);
 893
 894         priv->ibss_beacon = beacon;
 895         mutex_unlock(&priv->mutex);
 896
 897         iwl3945_send_beacon_cmd(priv);
 898 }
 899
 900 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 901                                 struct iwl_rx_mem_buffer *rxb)
 902 {
 903 #ifdef CONFIG_IWLWIFI_DEBUG
 904         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 905         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 906         u8 rate = beacon->beacon_notify_hdr.rate;
 907
 908         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 909                 "tsf %d %d rate %d\n",
 910                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 911                 beacon->beacon_notify_hdr.failure_frame,
 912                 le32_to_cpu(beacon->ibss_mgr_status),
 913                 le32_to_cpu(beacon->high_tsf),
 914                 le32_to_cpu(beacon->low_tsf), rate);
 915 #endif
 916
 917         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 918             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 919                 queue_work(priv->workqueue, &priv->beacon_update);
 920 }
 921
 922 /* Handle notification from uCode that card's power state is changing
 923  * due to software, hardware, or critical temperature RFKILL */
 924 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 925                                     struct iwl_rx_mem_buffer *rxb)
 926 {
 927         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 928         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 929         unsigned long status = priv->status;
 930
 931         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 932                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 933                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 934
 935         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 936                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 937
 938         if (flags & HW_CARD_DISABLED)
 939                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 940         else
 941                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 942
 943
 944         iwl_scan_cancel(priv);
 945
 946         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 947              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 948                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 949                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 950         else
 951                 wake_up_interruptible(&priv->wait_command_queue);
 952 }
 953
 954 /**
 955  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 956  *
 957  * Setup the RX handlers for each of the reply types sent from the uCode
 958  * to the host.
 959  *
 960  * This function chains into the hardware specific files for them to setup
 961  * any hardware specific handlers as well.
 962  */
 963 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 964 {
 965         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 966         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 967         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 968         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 969         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 970         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 971             iwl_rx_pm_debug_statistics_notif;
 972         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 973
 974         /*
 975          * The same handler is used for both the REPLY to a discrete
 976          * statistics request from the host as well as for the periodic
 977          * statistics notifications (after received beacons) from the uCode.
 978          */
 979         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 980         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 981
 982         iwl_setup_spectrum_handlers(priv);
 983         iwl_setup_rx_scan_handlers(priv);
 984         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 985
 986         /* Set up hardware specific Rx handlers */
 987         iwl3945_hw_rx_handler_setup(priv);
 988 }
 989
 990 /************************** RX-FUNCTIONS ****************************/
 991 /*
 992  * Rx theory of operation
 993  *
 994  * The host allocates 32 DMA target addresses and passes the host address
 995  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 996  * 0 to 31
 997  *
 998  * Rx Queue Indexes
 999  * The host/firmware share two index registers for managing the Rx buffers.
1000  *
1001  * The READ index maps to the first position that the firmware may be writing
1002  * to -- the driver can read up to (but not including) this position and get
1003  * good data.
1004  * The READ index is managed by the firmware once the card is enabled.
1005  *
1006  * The WRITE index maps to the last position the driver has read from -- the
1007  * position preceding WRITE is the last slot the firmware can place a packet.
1008  *
1009  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1010  * WRITE = READ.
1011  *
1012  * During initialization, the host sets up the READ queue position to the first
1013  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1014  *
1015  * When the firmware places a packet in a buffer, it will advance the READ index
1016  * and fire the RX interrupt.  The driver can then query the READ index and
1017  * process as many packets as possible, moving the WRITE index forward as it
1018  * resets the Rx queue buffers with new memory.
1019  *
1020  * The management in the driver is as follows:
1021  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1022  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1023  *   to replenish the iwl->rxq->rx_free.
1024  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1025  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1026  *   'processed' and 'read' driver indexes as well)
1027  * + A received packet is processed and handed to the kernel network stack,
1028  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1029  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1030  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1031  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1032  *   were enough free buffers and RX_STALLED is set it is cleared.
1033  *
1034  *
1035  * Driver sequence:
1036  *
1037  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1038  *                            iwl3945_rx_queue_restock
1039  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1040  *                            queue, updates firmware pointers, and updates
1041  *                            the WRITE index.  If insufficient rx_free buffers
1042  *                            are available, schedules iwl3945_rx_replenish
1043  *
1044  * -- enable interrupts --
1045  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1046  *                            READ INDEX, detaching the SKB from the pool.
1047  *                            Moves the packet buffer from queue to rx_used.
1048  *                            Calls iwl3945_rx_queue_restock to refill any empty
1049  *                            slots.
1050  * ...
1051  *
1052  */
1053
1054 /**
1055  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1056  */
1057 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1058                                           dma_addr_t dma_addr)
1059 {
1060         return cpu_to_le32((u32)dma_addr);
1061 }
1062
1063 /**
1064  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1065  *
1066  * If there are slots in the RX queue that need to be restocked,
1067  * and we have free pre-allocated buffers, fill the ranks as much
1068  * as we can, pulling from rx_free.
1069  *
1070  * This moves the 'write' index forward to catch up with 'processed', and
1071  * also updates the memory address in the firmware to reference the new
1072  * target buffer.
1073  */
1074 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1075 {
1076         struct iwl_rx_queue *rxq = &priv->rxq;
1077         struct list_head *element;
1078         struct iwl_rx_mem_buffer *rxb;
1079         unsigned long flags;
1080         int write, rc;
1081
1082         spin_lock_irqsave(&rxq->lock, flags);
1083         write = rxq->write & ~0x7;
1084         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1085                 /* Get next free Rx buffer, remove from free list */
1086                 element = rxq->rx_free.next;
1087                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1088                 list_del(element);
1089
1090                 /* Point to Rx buffer via next RBD in circular buffer */
1091                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1092                 rxq->queue[rxq->write] = rxb;
1093                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1094                 rxq->free_count--;
1095         }
1096         spin_unlock_irqrestore(&rxq->lock, flags);
1097         /* If the pre-allocated buffer pool is dropping low, schedule to
1098          * refill it */
1099         if (rxq->free_count <= RX_LOW_WATERMARK)
1100                 queue_work(priv->workqueue, &priv->rx_replenish);
1101
1102
1103         /* If we've added more space for the firmware to place data, tell it.
1104          * Increment device's write pointer in multiples of 8. */
1105         if ((rxq->write_actual != (rxq->write & ~0x7))
1106             || (abs(rxq->write - rxq->read) > 7)) {
1107                 spin_lock_irqsave(&rxq->lock, flags);
1108                 rxq->need_update = 1;
1109                 spin_unlock_irqrestore(&rxq->lock, flags);
1110                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1111                 if (rc)
1112                         return rc;
1113         }
1114
1115         return 0;
1116 }
1117
1118 /**
1119  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1120  *
1121  * When moving to rx_free an SKB is allocated for the slot.
1122  *
1123  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1124  * This is called as a scheduled work item (except for during initialization)
1125  */
1126 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1127 {
1128         struct iwl_rx_queue *rxq = &priv->rxq;
1129         struct list_head *element;
1130         struct iwl_rx_mem_buffer *rxb;
1131         unsigned long flags;
1132
1133         while (1) {
1134                 spin_lock_irqsave(&rxq->lock, flags);
1135
1136                 if (list_empty(&rxq->rx_used)) {
1137                         spin_unlock_irqrestore(&rxq->lock, flags);
1138                         return;
1139                 }
1140
1141                 element = rxq->rx_used.next;
1142                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1143                 list_del(element);
1144                 spin_unlock_irqrestore(&rxq->lock, flags);
1145
1146                 /* Alloc a new receive buffer */
1147                 rxb->skb =
1148                     alloc_skb(priv->hw_params.rx_buf_size,
1149                                 priority);
1150                 if (!rxb->skb) {
1151                         if (net_ratelimit())
1152                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1153                         /* We don't reschedule replenish work here -- we will
1154                          * call the restock method and if it still needs
1155                          * more buffers it will schedule replenish */
1156                         break;
1157                 }
1158
1159                 /* If radiotap head is required, reserve some headroom here.
1160                  * The physical head count is a variable rx_stats->phy_count.
1161                  * We reserve 4 bytes here. Plus these extra bytes, the
1162                  * headroom of the physical head should be enough for the
1163                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1164                  */
1165                 skb_reserve(rxb->skb, 4);
1166
1167                 /* Get physical address of RB/SKB */
1168                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1169                                                 rxb->skb->data,
1170                                                 priv->hw_params.rx_buf_size,
1171                                                 PCI_DMA_FROMDEVICE);
1172
1173                 spin_lock_irqsave(&rxq->lock, flags);
1174                 list_add_tail(&rxb->list, &rxq->rx_free);
1175                 priv->alloc_rxb_skb++;
1176                 rxq->free_count++;
1177                 spin_unlock_irqrestore(&rxq->lock, flags);
1178         }
1179 }
1180
1181 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1182 {
1183         unsigned long flags;
1184         int i;
1185         spin_lock_irqsave(&rxq->lock, flags);
1186         INIT_LIST_HEAD(&rxq->rx_free);
1187         INIT_LIST_HEAD(&rxq->rx_used);
1188         /* Fill the rx_used queue with _all_ of the Rx buffers */
1189         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1190                 /* In the reset function, these buffers may have been allocated
1191                  * to an SKB, so we need to unmap and free potential storage */
1192                 if (rxq->pool[i].skb != NULL) {
1193                         pci_unmap_single(priv->pci_dev,
1194                                          rxq->pool[i].real_dma_addr,
1195                                          priv->hw_params.rx_buf_size,
1196                                          PCI_DMA_FROMDEVICE);
1197                         priv->alloc_rxb_skb--;
1198                         dev_kfree_skb(rxq->pool[i].skb);
1199                         rxq->pool[i].skb = NULL;
1200                 }
1201                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1202         }
1203
1204         /* Set us so that we have processed and used all buffers, but have
1205          * not restocked the Rx queue with fresh buffers */
1206         rxq->read = rxq->write = 0;
1207         rxq->free_count = 0;
1208         rxq->write_actual = 0;
1209         spin_unlock_irqrestore(&rxq->lock, flags);
1210 }
1211
1212 void iwl3945_rx_replenish(void *data)
1213 {
1214         struct iwl_priv *priv = data;
1215         unsigned long flags;
1216
1217         iwl3945_rx_allocate(priv, GFP_KERNEL);
1218
1219         spin_lock_irqsave(&priv->lock, flags);
1220         iwl3945_rx_queue_restock(priv);
1221         spin_unlock_irqrestore(&priv->lock, flags);
1222 }
1223
1224 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1225 {
1226         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1227
1228         iwl3945_rx_queue_restock(priv);
1229 }
1230
1231
1232 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1233  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1234  * This free routine walks the list of POOL entries and if SKB is set to
1235  * non NULL it is unmapped and freed
1236  */
1237 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1238 {
1239         int i;
1240         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1241                 if (rxq->pool[i].skb != NULL) {
1242                         pci_unmap_single(priv->pci_dev,
1243                                          rxq->pool[i].real_dma_addr,
1244                                          priv->hw_params.rx_buf_size,
1245                                          PCI_DMA_FROMDEVICE);
1246                         dev_kfree_skb(rxq->pool[i].skb);
1247                 }
1248         }
1249
1250         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1251                             rxq->dma_addr);
1252         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1253                             rxq->rb_stts, rxq->rb_stts_dma);
1254         rxq->bd = NULL;
1255         rxq->rb_stts  = NULL;
1256 }
1257
1258
1259 /* Convert linear signal-to-noise ratio into dB */
1260 static u8 ratio2dB[100] = {
1261 /*       0   1   2   3   4   5   6   7   8   9 */
1262          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1263         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1264         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1265         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1266         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1267         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1268         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1269         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1270         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1271         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1272 };
1273
1274 /* Calculates a relative dB value from a ratio of linear
1275  *   (i.e. not dB) signal levels.
1276  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1277 int iwl3945_calc_db_from_ratio(int sig_ratio)
1278 {
1279         /* 1000:1 or higher just report as 60 dB */
1280         if (sig_ratio >= 1000)
1281                 return 60;
1282
1283         /* 100:1 or higher, divide by 10 and use table,
1284          *   add 20 dB to make up for divide by 10 */
1285         if (sig_ratio >= 100)
1286                 return 20 + (int)ratio2dB[sig_ratio/10];
1287
1288         /* We shouldn't see this */
1289         if (sig_ratio < 1)
1290                 return 0;
1291
1292         /* Use table for ratios 1:1 - 99:1 */
1293         return (int)ratio2dB[sig_ratio];
1294 }
1295
1296 #define PERFECT_RSSI (-20) /* dBm */
1297 #define WORST_RSSI (-95)   /* dBm */
1298 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1299
1300 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1301  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1302  *   about formulas used below. */
1303 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1304 {
1305         int sig_qual;
1306         int degradation = PERFECT_RSSI - rssi_dbm;
1307
1308         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1309          * as indicator; formula is (signal dbm - noise dbm).
1310          * SNR at or above 40 is a great signal (100%).
1311          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1312          * Weakest usable signal is usually 10 - 15 dB SNR. */
1313         if (noise_dbm) {
1314                 if (rssi_dbm - noise_dbm >= 40)
1315                         return 100;
1316                 else if (rssi_dbm < noise_dbm)
1317                         return 0;
1318                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1319
1320         /* Else use just the signal level.
1321          * This formula is a least squares fit of data points collected and
1322          *   compared with a reference system that had a percentage (%) display
1323          *   for signal quality. */
1324         } else
1325                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1326                             (15 * RSSI_RANGE + 62 * degradation)) /
1327                            (RSSI_RANGE * RSSI_RANGE);
1328
1329         if (sig_qual > 100)
1330                 sig_qual = 100;
1331         else if (sig_qual < 1)
1332                 sig_qual = 0;
1333
1334         return sig_qual;
1335 }
1336
1337 /**
1338  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1339  *
1340  * Uses the priv->rx_handlers callback function array to invoke
1341  * the appropriate handlers, including command responses,
1342  * frame-received notifications, and other notifications.
1343  */
1344 static void iwl3945_rx_handle(struct iwl_priv *priv)
1345 {
1346         struct iwl_rx_mem_buffer *rxb;
1347         struct iwl_rx_packet *pkt;
1348         struct iwl_rx_queue *rxq = &priv->rxq;
1349         u32 r, i;
1350         int reclaim;
1351         unsigned long flags;
1352         u8 fill_rx = 0;
1353         u32 count = 8;
1354         int total_empty = 0;
1355
1356         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1357          * buffer that the driver may process (last buffer filled by ucode). */
1358         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1359         i = rxq->read;
1360
1361         /* calculate total frames need to be restock after handling RX */
1362         total_empty = r - priv->rxq.write_actual;
1363         if (total_empty < 0)
1364                 total_empty += RX_QUEUE_SIZE;
1365
1366         if (total_empty > (RX_QUEUE_SIZE / 2))
1367                 fill_rx = 1;
1368         /* Rx interrupt, but nothing sent from uCode */
1369         if (i == r)
1370                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1371
1372         while (i != r) {
1373                 rxb = rxq->queue[i];
1374
1375                 /* If an RXB doesn't have a Rx queue slot associated with it,
1376                  * then a bug has been introduced in the queue refilling
1377                  * routines -- catch it here */
1378                 BUG_ON(rxb == NULL);
1379
1380                 rxq->queue[i] = NULL;
1381
1382                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1383                                 priv->hw_params.rx_buf_size,
1384                                 PCI_DMA_FROMDEVICE);
1385                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1386
1387                 /* Reclaim a command buffer only if this packet is a response
1388                  *   to a (driver-originated) command.
1389                  * If the packet (e.g. Rx frame) originated from uCode,
1390                  *   there is no command buffer to reclaim.
1391                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1392                  *   but apparently a few don't get set; catch them here. */
1393                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1394                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1395                         (pkt->hdr.cmd != REPLY_TX);
1396
1397                 /* Based on type of command response or notification,
1398                  *   handle those that need handling via function in
1399                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1400                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1401                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1402                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1403                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1404                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1405                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1406                 } else {
1407                         /* No handling needed */
1408                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1409                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1410                                 r, i, get_cmd_string(pkt->hdr.cmd),
1411                                 pkt->hdr.cmd);
1412                 }
1413
1414                 if (reclaim) {
1415                         /* Invoke any callbacks, transfer the skb to caller, and
1416                          * fire off the (possibly) blocking iwl_send_cmd()
1417                          * as we reclaim the driver command queue */
1418                         if (rxb && rxb->skb)
1419                                 iwl_tx_cmd_complete(priv, rxb);
1420                         else
1421                                 IWL_WARN(priv, "Claim null rxb?\n");
1422                 }
1423
1424                 /* For now we just don't re-use anything.  We can tweak this
1425                  * later to try and re-use notification packets and SKBs that
1426                  * fail to Rx correctly */
1427                 if (rxb->skb != NULL) {
1428                         priv->alloc_rxb_skb--;
1429                         dev_kfree_skb_any(rxb->skb);
1430                         rxb->skb = NULL;
1431                 }
1432
1433                 spin_lock_irqsave(&rxq->lock, flags);
1434                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1435                 spin_unlock_irqrestore(&rxq->lock, flags);
1436                 i = (i + 1) & RX_QUEUE_MASK;
1437                 /* If there are a lot of unused frames,
1438                  * restock the Rx queue so ucode won't assert. */
1439                 if (fill_rx) {
1440                         count++;
1441                         if (count >= 8) {
1442                                 priv->rxq.read = i;
1443                                 iwl3945_rx_replenish_now(priv);
1444                                 count = 0;
1445                         }
1446                 }
1447         }
1448
1449         /* Backtrack one entry */
1450         priv->rxq.read = i;
1451         if (fill_rx)
1452                 iwl3945_rx_replenish_now(priv);
1453         else
1454                 iwl3945_rx_queue_restock(priv);
1455 }
1456
1457 /* call this function to flush any scheduled tasklet */
1458 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1459 {
1460         /* wait to make sure we flush pending tasklet*/
1461         synchronize_irq(priv->pci_dev->irq);
1462         tasklet_kill(&priv->irq_tasklet);
1463 }
1464
1465 static const char *desc_lookup(int i)
1466 {
1467         switch (i) {
1468         case 1:
1469                 return "FAIL";
1470         case 2:
1471                 return "BAD_PARAM";
1472         case 3:
1473                 return "BAD_CHECKSUM";
1474         case 4:
1475                 return "NMI_INTERRUPT";
1476         case 5:
1477                 return "SYSASSERT";
1478         case 6:
1479                 return "FATAL_ERROR";
1480         }
1481
1482         return "UNKNOWN";
1483 }
1484
1485 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1486 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1487
1488 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1489 {
1490         u32 i;
1491         u32 desc, time, count, base, data1;
1492         u32 blink1, blink2, ilink1, ilink2;
1493
1494         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1495
1496         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1497                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1498                 return;
1499         }
1500
1501
1502         count = iwl_read_targ_mem(priv, base);
1503
1504         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1505                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1506                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1507                         priv->status, count);
1508         }
1509
1510         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1511                   "ilink1  nmiPC   Line\n");
1512         for (i = ERROR_START_OFFSET;
1513              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1514              i += ERROR_ELEM_SIZE) {
1515                 desc = iwl_read_targ_mem(priv, base + i);
1516                 time =
1517                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1518                 blink1 =
1519                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1520                 blink2 =
1521                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1522                 ilink1 =
1523                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1524                 ilink2 =
1525                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1526                 data1 =
1527                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1528
1529                 IWL_ERR(priv,
1530                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1531                         desc_lookup(desc), desc, time, blink1, blink2,
1532                         ilink1, ilink2, data1);
1533         }
1534
1535 }
1536
1537 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1538
1539 /**
1540  * iwl3945_print_event_log - Dump error event log to syslog
1541  *
1542  */
1543 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1544                                 u32 num_events, u32 mode)
1545 {
1546         u32 i;
1547         u32 base;       /* SRAM byte address of event log header */
1548         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1549         u32 ptr;        /* SRAM byte address of log data */
1550         u32 ev, time, data; /* event log data */
1551
1552         if (num_events == 0)
1553                 return;
1554
1555         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1556
1557         if (mode == 0)
1558                 event_size = 2 * sizeof(u32);
1559         else
1560                 event_size = 3 * sizeof(u32);
1561
1562         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1563
1564         /* "time" is actually "data" for mode 0 (no timestamp).
1565          * place event id # at far right for easier visual parsing. */
1566         for (i = 0; i < num_events; i++) {
1567                 ev = iwl_read_targ_mem(priv, ptr);
1568                 ptr += sizeof(u32);
1569                 time = iwl_read_targ_mem(priv, ptr);
1570                 ptr += sizeof(u32);
1571                 if (mode == 0) {
1572                         /* data, ev */
1573                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1574                 } else {
1575                         data = iwl_read_targ_mem(priv, ptr);
1576                         ptr += sizeof(u32);
1577                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1578                 }
1579         }
1580 }
1581
1582 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1583 {
1584         u32 base;       /* SRAM byte address of event log header */
1585         u32 capacity;   /* event log capacity in # entries */
1586         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1587         u32 num_wraps;  /* # times uCode wrapped to top of log */
1588         u32 next_entry; /* index of next entry to be written by uCode */
1589         u32 size;       /* # entries that we'll print */
1590
1591         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1592         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1593                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1594                 return;
1595         }
1596
1597         /* event log header */
1598         capacity = iwl_read_targ_mem(priv, base);
1599         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1600         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1601         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1602
1603         size = num_wraps ? capacity : next_entry;
1604
1605         /* bail out if nothing in log */
1606         if (size == 0) {
1607                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1608                 return;
1609         }
1610
1611         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1612                   size, num_wraps);
1613
1614         /* if uCode has wrapped back to top of log, start at the oldest entry,
1615          * i.e the next one that uCode would fill. */
1616         if (num_wraps)
1617                 iwl3945_print_event_log(priv, next_entry,
1618                                     capacity - next_entry, mode);
1619
1620         /* (then/else) start at top of log */
1621         iwl3945_print_event_log(priv, 0, next_entry, mode);
1622
1623 }
1624
1625 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1626 {
1627         u32 inta, handled = 0;
1628         u32 inta_fh;
1629         unsigned long flags;
1630 #ifdef CONFIG_IWLWIFI_DEBUG
1631         u32 inta_mask;
1632 #endif
1633
1634         spin_lock_irqsave(&priv->lock, flags);
1635
1636         /* Ack/clear/reset pending uCode interrupts.
1637          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1638          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1639         inta = iwl_read32(priv, CSR_INT);
1640         iwl_write32(priv, CSR_INT, inta);
1641
1642         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1643          * Any new interrupts that happen after this, either while we're
1644          * in this tasklet, or later, will show up in next ISR/tasklet. */
1645         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1646         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1647
1648 #ifdef CONFIG_IWLWIFI_DEBUG
1649         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1650                 /* just for debug */
1651                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1652                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1653                               inta, inta_mask, inta_fh);
1654         }
1655 #endif
1656
1657         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1658          * atomic, make sure that inta covers all the interrupts that
1659          * we've discovered, even if FH interrupt came in just after
1660          * reading CSR_INT. */
1661         if (inta_fh & CSR39_FH_INT_RX_MASK)
1662                 inta |= CSR_INT_BIT_FH_RX;
1663         if (inta_fh & CSR39_FH_INT_TX_MASK)
1664                 inta |= CSR_INT_BIT_FH_TX;
1665
1666         /* Now service all interrupt bits discovered above. */
1667         if (inta & CSR_INT_BIT_HW_ERR) {
1668                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1669
1670                 /* Tell the device to stop sending interrupts */
1671                 iwl_disable_interrupts(priv);
1672
1673                 priv->isr_stats.hw++;
1674                 iwl_irq_handle_error(priv);
1675
1676                 handled |= CSR_INT_BIT_HW_ERR;
1677
1678                 spin_unlock_irqrestore(&priv->lock, flags);
1679
1680                 return;
1681         }
1682
1683 #ifdef CONFIG_IWLWIFI_DEBUG
1684         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1685                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1686                 if (inta & CSR_INT_BIT_SCD) {
1687                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1688                                       "the frame/frames.\n");
1689                         priv->isr_stats.sch++;
1690                 }
1691
1692                 /* Alive notification via Rx interrupt will do the real work */
1693                 if (inta & CSR_INT_BIT_ALIVE) {
1694                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1695                         priv->isr_stats.alive++;
1696                 }
1697         }
1698 #endif
1699         /* Safely ignore these bits for debug checks below */
1700         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1701
1702         /* Error detected by uCode */
1703         if (inta & CSR_INT_BIT_SW_ERR) {
1704                 IWL_ERR(priv, "Microcode SW error detected. "
1705                         "Restarting 0x%X.\n", inta);
1706                 priv->isr_stats.sw++;
1707                 priv->isr_stats.sw_err = inta;
1708                 iwl_irq_handle_error(priv);
1709                 handled |= CSR_INT_BIT_SW_ERR;
1710         }
1711
1712         /* uCode wakes up after power-down sleep */
1713         if (inta & CSR_INT_BIT_WAKEUP) {
1714                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1715                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1716                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1717                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1718                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1719                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1720                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1721                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1722
1723                 priv->isr_stats.wakeup++;
1724                 handled |= CSR_INT_BIT_WAKEUP;
1725         }
1726
1727         /* All uCode command responses, including Tx command responses,
1728          * Rx "responses" (frame-received notification), and other
1729          * notifications from uCode come through here*/
1730         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1731                 iwl3945_rx_handle(priv);
1732                 priv->isr_stats.rx++;
1733                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1734         }
1735
1736         if (inta & CSR_INT_BIT_FH_TX) {
1737                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1738                 priv->isr_stats.tx++;
1739
1740                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1741                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1742                                         (FH39_SRVC_CHNL), 0x0);
1743                 handled |= CSR_INT_BIT_FH_TX;
1744         }
1745
1746         if (inta & ~handled) {
1747                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1748                 priv->isr_stats.unhandled++;
1749         }
1750
1751         if (inta & ~priv->inta_mask) {
1752                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1753                          inta & ~priv->inta_mask);
1754                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1755         }
1756
1757         /* Re-enable all interrupts */
1758         /* only Re-enable if disabled by irq */
1759         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1760                 iwl_enable_interrupts(priv);
1761
1762 #ifdef CONFIG_IWLWIFI_DEBUG
1763         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1764                 inta = iwl_read32(priv, CSR_INT);
1765                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1766                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1767                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1768                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1769         }
1770 #endif
1771         spin_unlock_irqrestore(&priv->lock, flags);
1772 }
1773
1774 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1775                                          enum ieee80211_band band,
1776                                      u8 is_active, u8 n_probes,
1777                                      struct iwl3945_scan_channel *scan_ch)
1778 {
1779         struct ieee80211_channel *chan;
1780         const struct ieee80211_supported_band *sband;
1781         const struct iwl_channel_info *ch_info;
1782         u16 passive_dwell = 0;
1783         u16 active_dwell = 0;
1784         int added, i;
1785
1786         sband = iwl_get_hw_mode(priv, band);
1787         if (!sband)
1788                 return 0;
1789
1790         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1791         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1792
1793         if (passive_dwell <= active_dwell)
1794                 passive_dwell = active_dwell + 1;
1795
1796         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1797                 chan = priv->scan_request->channels[i];
1798
1799                 if (chan->band != band)
1800                         continue;
1801
1802                 scan_ch->channel = chan->hw_value;
1803
1804                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1805                 if (!is_channel_valid(ch_info)) {
1806                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1807                                        scan_ch->channel);
1808                         continue;
1809                 }
1810
1811                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1812                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1813                 /* If passive , set up for auto-switch
1814                  *  and use long active_dwell time.
1815                  */
1816                 if (!is_active || is_channel_passive(ch_info) ||
1817                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1818                         scan_ch->type = 0;      /* passive */
1819                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1820                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1821                 } else {
1822                         scan_ch->type = 1;      /* active */
1823                 }
1824
1825                 /* Set direct probe bits. These may be used both for active
1826                  * scan channels (probes gets sent right away),
1827                  * or for passive channels (probes get se sent only after
1828                  * hearing clear Rx packet).*/
1829                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1830                         if (n_probes)
1831                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1832                 } else {
1833                         /* uCode v1 does not allow setting direct probe bits on
1834                          * passive channel. */
1835                         if ((scan_ch->type & 1) && n_probes)
1836                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1837                 }
1838
1839                 /* Set txpower levels to defaults */
1840                 scan_ch->tpc.dsp_atten = 110;
1841                 /* scan_pwr_info->tpc.dsp_atten; */
1842
1843                 /*scan_pwr_info->tpc.tx_gain; */
1844                 if (band == IEEE80211_BAND_5GHZ)
1845                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1846                 else {
1847                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1848                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1849                          * power level:
1850                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1851                          */
1852                 }
1853
1854                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1855                                scan_ch->channel,
1856                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1857                                (scan_ch->type & 1) ?
1858                                active_dwell : passive_dwell);
1859
1860                 scan_ch++;
1861                 added++;
1862         }
1863
1864         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1865         return added;
1866 }
1867
1868 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1869                               struct ieee80211_rate *rates)
1870 {
1871         int i;
1872
1873         for (i = 0; i < IWL_RATE_COUNT; i++) {
1874                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1875                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1876                 rates[i].hw_value_short = i;
1877                 rates[i].flags = 0;
1878                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1879                         /*
1880                          * If CCK != 1M then set short preamble rate flag.
1881                          */
1882                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1883                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1884                 }
1885         }
1886 }
1887
1888 /******************************************************************************
1889  *
1890  * uCode download functions
1891  *
1892  ******************************************************************************/
1893
1894 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1895 {
1896         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1897         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1898         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1899         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1900         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1901         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1902 }
1903
1904 /**
1905  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1906  *     looking at all data.
1907  */
1908 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1909 {
1910         u32 val;
1911         u32 save_len = len;
1912         int rc = 0;
1913         u32 errcnt;
1914
1915         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1916
1917         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1918                                IWL39_RTC_INST_LOWER_BOUND);
1919
1920         errcnt = 0;
1921         for (; len > 0; len -= sizeof(u32), image++) {
1922                 /* read data comes through single port, auto-incr addr */
1923                 /* NOTE: Use the debugless read so we don't flood kernel log
1924                  * if IWL_DL_IO is set */
1925                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1926                 if (val != le32_to_cpu(*image)) {
1927                         IWL_ERR(priv, "uCode INST section is invalid at "
1928                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1929                                   save_len - len, val, le32_to_cpu(*image));
1930                         rc = -EIO;
1931                         errcnt++;
1932                         if (errcnt >= 20)
1933                                 break;
1934                 }
1935         }
1936
1937
1938         if (!errcnt)
1939                 IWL_DEBUG_INFO(priv,
1940                         "ucode image in INSTRUCTION memory is good\n");
1941
1942         return rc;
1943 }
1944
1945
1946 /**
1947  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1948  *   using sample data 100 bytes apart.  If these sample points are good,
1949  *   it's a pretty good bet that everything between them is good, too.
1950  */
1951 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1952 {
1953         u32 val;
1954         int rc = 0;
1955         u32 errcnt = 0;
1956         u32 i;
1957
1958         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1959
1960         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1961                 /* read data comes through single port, auto-incr addr */
1962                 /* NOTE: Use the debugless read so we don't flood kernel log
1963                  * if IWL_DL_IO is set */
1964                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1965                         i + IWL39_RTC_INST_LOWER_BOUND);
1966                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1967                 if (val != le32_to_cpu(*image)) {
1968 #if 0 /* Enable this if you want to see details */
1969                         IWL_ERR(priv, "uCode INST section is invalid at "
1970                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1971                                   i, val, *image);
1972 #endif
1973                         rc = -EIO;
1974                         errcnt++;
1975                         if (errcnt >= 3)
1976                                 break;
1977                 }
1978         }
1979
1980         return rc;
1981 }
1982
1983
1984 /**
1985  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1986  *    and verify its contents
1987  */
1988 static int iwl3945_verify_ucode(struct iwl_priv *priv)
1989 {
1990         __le32 *image;
1991         u32 len;
1992         int rc = 0;
1993
1994         /* Try bootstrap */
1995         image = (__le32 *)priv->ucode_boot.v_addr;
1996         len = priv->ucode_boot.len;
1997         rc = iwl3945_verify_inst_sparse(priv, image, len);
1998         if (rc == 0) {
1999                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2000                 return 0;
2001         }
2002
2003         /* Try initialize */
2004         image = (__le32 *)priv->ucode_init.v_addr;
2005         len = priv->ucode_init.len;
2006         rc = iwl3945_verify_inst_sparse(priv, image, len);
2007         if (rc == 0) {
2008                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2009                 return 0;
2010         }
2011
2012         /* Try runtime/protocol */
2013         image = (__le32 *)priv->ucode_code.v_addr;
2014         len = priv->ucode_code.len;
2015         rc = iwl3945_verify_inst_sparse(priv, image, len);
2016         if (rc == 0) {
2017                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2018                 return 0;
2019         }
2020
2021         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2022
2023         /* Since nothing seems to match, show first several data entries in
2024          * instruction SRAM, so maybe visual inspection will give a clue.
2025          * Selection of bootstrap image (vs. other images) is arbitrary. */
2026         image = (__le32 *)priv->ucode_boot.v_addr;
2027         len = priv->ucode_boot.len;
2028         rc = iwl3945_verify_inst_full(priv, image, len);
2029
2030         return rc;
2031 }
2032
2033 static void iwl3945_nic_start(struct iwl_priv *priv)
2034 {
2035         /* Remove all resets to allow NIC to operate */
2036         iwl_write32(priv, CSR_RESET, 0);
2037 }
2038
2039 /**
2040  * iwl3945_read_ucode - Read uCode images from disk file.
2041  *
2042  * Copy into buffers for card to fetch via bus-mastering
2043  */
2044 static int iwl3945_read_ucode(struct iwl_priv *priv)
2045 {
2046         const struct iwl_ucode_header *ucode;
2047         int ret = -EINVAL, index;
2048         const struct firmware *ucode_raw;
2049         /* firmware file name contains uCode/driver compatibility version */
2050         const char *name_pre = priv->cfg->fw_name_pre;
2051         const unsigned int api_max = priv->cfg->ucode_api_max;
2052         const unsigned int api_min = priv->cfg->ucode_api_min;
2053         char buf[25];
2054         u8 *src;
2055         size_t len;
2056         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2057
2058         /* Ask kernel firmware_class module to get the boot firmware off disk.
2059          * request_firmware() is synchronous, file is in memory on return. */
2060         for (index = api_max; index >= api_min; index--) {
2061                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2062                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2063                 if (ret < 0) {
2064                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2065                                   buf, ret);
2066                         if (ret == -ENOENT)
2067                                 continue;
2068                         else
2069                                 goto error;
2070                 } else {
2071                         if (index < api_max)
2072                                 IWL_ERR(priv, "Loaded firmware %s, "
2073                                         "which is deprecated. "
2074                                         " Please use API v%u instead.\n",
2075                                           buf, api_max);
2076                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2077                                        "(%zd bytes) from disk\n",
2078                                        buf, ucode_raw->size);
2079                         break;
2080                 }
2081         }
2082
2083         if (ret < 0)
2084                 goto error;
2085
2086         /* Make sure that we got at least our header! */
2087         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2088                 IWL_ERR(priv, "File size way too small!\n");
2089                 ret = -EINVAL;
2090                 goto err_release;
2091         }
2092
2093         /* Data from ucode file:  header followed by uCode images */
2094         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2095
2096         priv->ucode_ver = le32_to_cpu(ucode->ver);
2097         api_ver = IWL_UCODE_API(priv->ucode_ver);
2098         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2099         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2100         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2101         init_data_size =
2102                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2103         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2104         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2105
2106         /* api_ver should match the api version forming part of the
2107          * firmware filename ... but we don't check for that and only rely
2108          * on the API version read from firmware header from here on forward */
2109
2110         if (api_ver < api_min || api_ver > api_max) {
2111                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2112                           "Driver supports v%u, firmware is v%u.\n",
2113                           api_max, api_ver);
2114                 priv->ucode_ver = 0;
2115                 ret = -EINVAL;
2116                 goto err_release;
2117         }
2118         if (api_ver != api_max)
2119                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2120                           "got %u. New firmware can be obtained "
2121                           "from http://www.intellinuxwireless.org.\n",
2122                           api_max, api_ver);
2123
2124         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2125                 IWL_UCODE_MAJOR(priv->ucode_ver),
2126                 IWL_UCODE_MINOR(priv->ucode_ver),
2127                 IWL_UCODE_API(priv->ucode_ver),
2128                 IWL_UCODE_SERIAL(priv->ucode_ver));
2129
2130         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2131                        priv->ucode_ver);
2132         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2133                        inst_size);
2134         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2135                        data_size);
2136         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2137                        init_size);
2138         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2139                        init_data_size);
2140         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2141                        boot_size);
2142
2143
2144         /* Verify size of file vs. image size info in file's header */
2145         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2146                 inst_size + data_size + init_size +
2147                 init_data_size + boot_size) {
2148
2149                 IWL_DEBUG_INFO(priv,
2150                         "uCode file size %zd does not match expected size\n",
2151                         ucode_raw->size);
2152                 ret = -EINVAL;
2153                 goto err_release;
2154         }
2155
2156         /* Verify that uCode images will fit in card's SRAM */
2157         if (inst_size > IWL39_MAX_INST_SIZE) {
2158                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2159                                inst_size);
2160                 ret = -EINVAL;
2161                 goto err_release;
2162         }
2163
2164         if (data_size > IWL39_MAX_DATA_SIZE) {
2165                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2166                                data_size);
2167                 ret = -EINVAL;
2168                 goto err_release;
2169         }
2170         if (init_size > IWL39_MAX_INST_SIZE) {
2171                 IWL_DEBUG_INFO(priv,
2172                                 "uCode init instr len %d too large to fit in\n",
2173                                 init_size);
2174                 ret = -EINVAL;
2175                 goto err_release;
2176         }
2177         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2178                 IWL_DEBUG_INFO(priv,
2179                                 "uCode init data len %d too large to fit in\n",
2180                                 init_data_size);
2181                 ret = -EINVAL;
2182                 goto err_release;
2183         }
2184         if (boot_size > IWL39_MAX_BSM_SIZE) {
2185                 IWL_DEBUG_INFO(priv,
2186                                 "uCode boot instr len %d too large to fit in\n",
2187                                 boot_size);
2188                 ret = -EINVAL;
2189                 goto err_release;
2190         }
2191
2192         /* Allocate ucode buffers for card's bus-master loading ... */
2193
2194         /* Runtime instructions and 2 copies of data:
2195          * 1) unmodified from disk
2196          * 2) backup cache for save/restore during power-downs */
2197         priv->ucode_code.len = inst_size;
2198         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2199
2200         priv->ucode_data.len = data_size;
2201         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2202
2203         priv->ucode_data_backup.len = data_size;
2204         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2205
2206         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2207             !priv->ucode_data_backup.v_addr)
2208                 goto err_pci_alloc;
2209
2210         /* Initialization instructions and data */
2211         if (init_size && init_data_size) {
2212                 priv->ucode_init.len = init_size;
2213                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2214
2215                 priv->ucode_init_data.len = init_data_size;
2216                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2217
2218                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2219                         goto err_pci_alloc;
2220         }
2221
2222         /* Bootstrap (instructions only, no data) */
2223         if (boot_size) {
2224                 priv->ucode_boot.len = boot_size;
2225                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2226
2227                 if (!priv->ucode_boot.v_addr)
2228                         goto err_pci_alloc;
2229         }
2230
2231         /* Copy images into buffers for card's bus-master reads ... */
2232
2233         /* Runtime instructions (first block of data in file) */
2234         len = inst_size;
2235         IWL_DEBUG_INFO(priv,
2236                 "Copying (but not loading) uCode instr len %zd\n", len);
2237         memcpy(priv->ucode_code.v_addr, src, len);
2238         src += len;
2239
2240         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2241                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2242
2243         /* Runtime data (2nd block)
2244          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2245         len = data_size;
2246         IWL_DEBUG_INFO(priv,
2247                 "Copying (but not loading) uCode data len %zd\n", len);
2248         memcpy(priv->ucode_data.v_addr, src, len);
2249         memcpy(priv->ucode_data_backup.v_addr, src, len);
2250         src += len;
2251
2252         /* Initialization instructions (3rd block) */
2253         if (init_size) {
2254                 len = init_size;
2255                 IWL_DEBUG_INFO(priv,
2256                         "Copying (but not loading) init instr len %zd\n", len);
2257                 memcpy(priv->ucode_init.v_addr, src, len);
2258                 src += len;
2259         }
2260
2261         /* Initialization data (4th block) */
2262         if (init_data_size) {
2263                 len = init_data_size;
2264                 IWL_DEBUG_INFO(priv,
2265                         "Copying (but not loading) init data len %zd\n", len);
2266                 memcpy(priv->ucode_init_data.v_addr, src, len);
2267                 src += len;
2268         }
2269
2270         /* Bootstrap instructions (5th block) */
2271         len = boot_size;
2272         IWL_DEBUG_INFO(priv,
2273                 "Copying (but not loading) boot instr len %zd\n", len);
2274         memcpy(priv->ucode_boot.v_addr, src, len);
2275
2276         /* We have our copies now, allow OS release its copies */
2277         release_firmware(ucode_raw);
2278         return 0;
2279
2280  err_pci_alloc:
2281         IWL_ERR(priv, "failed to allocate pci memory\n");
2282         ret = -ENOMEM;
2283         iwl3945_dealloc_ucode_pci(priv);
2284
2285  err_release:
2286         release_firmware(ucode_raw);
2287
2288  error:
2289         return ret;
2290 }
2291
2292
2293 /**
2294  * iwl3945_set_ucode_ptrs - Set uCode address location
2295  *
2296  * Tell initialization uCode where to find runtime uCode.
2297  *
2298  * BSM registers initially contain pointers to initialization uCode.
2299  * We need to replace them to load runtime uCode inst and data,
2300  * and to save runtime data when powering down.
2301  */
2302 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2303 {
2304         dma_addr_t pinst;
2305         dma_addr_t pdata;
2306
2307         /* bits 31:0 for 3945 */
2308         pinst = priv->ucode_code.p_addr;
2309         pdata = priv->ucode_data_backup.p_addr;
2310
2311         /* Tell bootstrap uCode where to find image to load */
2312         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2313         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2314         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2315                                  priv->ucode_data.len);
2316
2317         /* Inst byte count must be last to set up, bit 31 signals uCode
2318          *   that all new ptr/size info is in place */
2319         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2320                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2321
2322         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2323
2324         return 0;
2325 }
2326
2327 /**
2328  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2329  *
2330  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2331  *
2332  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2333  */
2334 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2335 {
2336         /* Check alive response for "valid" sign from uCode */
2337         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2338                 /* We had an error bringing up the hardware, so take it
2339                  * all the way back down so we can try again */
2340                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2341                 goto restart;
2342         }
2343
2344         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2345          * This is a paranoid check, because we would not have gotten the
2346          * "initialize" alive if code weren't properly loaded.  */
2347         if (iwl3945_verify_ucode(priv)) {
2348                 /* Runtime instruction load was bad;
2349                  * take it all the way back down so we can try again */
2350                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2351                 goto restart;
2352         }
2353
2354         /* Send pointers to protocol/runtime uCode image ... init code will
2355          * load and launch runtime uCode, which will send us another "Alive"
2356          * notification. */
2357         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2358         if (iwl3945_set_ucode_ptrs(priv)) {
2359                 /* Runtime instruction load won't happen;
2360                  * take it all the way back down so we can try again */
2361                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2362                 goto restart;
2363         }
2364         return;
2365
2366  restart:
2367         queue_work(priv->workqueue, &priv->restart);
2368 }
2369
2370 /**
2371  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2372  *                   from protocol/runtime uCode (initialization uCode's
2373  *                   Alive gets handled by iwl3945_init_alive_start()).
2374  */
2375 static void iwl3945_alive_start(struct iwl_priv *priv)
2376 {
2377         int thermal_spin = 0;
2378         u32 rfkill;
2379
2380         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2381
2382         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2383                 /* We had an error bringing up the hardware, so take it
2384                  * all the way back down so we can try again */
2385                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2386                 goto restart;
2387         }
2388
2389         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2390          * This is a paranoid check, because we would not have gotten the
2391          * "runtime" alive if code weren't properly loaded.  */
2392         if (iwl3945_verify_ucode(priv)) {
2393                 /* Runtime instruction load was bad;
2394                  * take it all the way back down so we can try again */
2395                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2396                 goto restart;
2397         }
2398
2399         iwl_clear_stations_table(priv);
2400
2401         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2402         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2403
2404         if (rfkill & 0x1) {
2405                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2406                 /* if RFKILL is not on, then wait for thermal
2407                  * sensor in adapter to kick in */
2408                 while (iwl3945_hw_get_temperature(priv) == 0) {
2409                         thermal_spin++;
2410                         udelay(10);
2411                 }
2412
2413                 if (thermal_spin)
2414                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2415                                        thermal_spin * 10);
2416         } else
2417                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2418
2419         /* After the ALIVE response, we can send commands to 3945 uCode */
2420         set_bit(STATUS_ALIVE, &priv->status);
2421
2422         if (iwl_is_rfkill(priv))
2423                 return;
2424
2425         ieee80211_wake_queues(priv->hw);
2426
2427         priv->active_rate = priv->rates_mask;
2428         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2429
2430         iwl_power_update_mode(priv, false);
2431
2432         if (iwl_is_associated(priv)) {
2433                 struct iwl3945_rxon_cmd *active_rxon =
2434                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2435
2436                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2437                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2438         } else {
2439                 /* Initialize our rx_config data */
2440                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2441         }
2442
2443         /* Configure Bluetooth device coexistence support */
2444         iwl_send_bt_config(priv);
2445
2446         /* Configure the adapter for unassociated operation */
2447         iwlcore_commit_rxon(priv);
2448
2449         iwl3945_reg_txpower_periodic(priv);
2450
2451         iwl3945_led_register(priv);
2452
2453         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2454         set_bit(STATUS_READY, &priv->status);
2455         wake_up_interruptible(&priv->wait_command_queue);
2456
2457         /* reassociate for ADHOC mode */
2458         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2459                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2460                                                                 priv->vif);
2461                 if (beacon)
2462                         iwl_mac_beacon_update(priv->hw, beacon);
2463         }
2464
2465         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2466                 iwl_set_mode(priv, priv->iw_mode);
2467
2468         return;
2469
2470  restart:
2471         queue_work(priv->workqueue, &priv->restart);
2472 }
2473
2474 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2475
2476 static void __iwl3945_down(struct iwl_priv *priv)
2477 {
2478         unsigned long flags;
2479         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2480         struct ieee80211_conf *conf = NULL;
2481
2482         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2483
2484         conf = ieee80211_get_hw_conf(priv->hw);
2485
2486         if (!exit_pending)
2487                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2488
2489         iwl3945_led_unregister(priv);
2490         iwl_clear_stations_table(priv);
2491
2492         /* Unblock any waiting calls */
2493         wake_up_interruptible_all(&priv->wait_command_queue);
2494
2495         /* Wipe out the EXIT_PENDING status bit if we are not actually
2496          * exiting the module */
2497         if (!exit_pending)
2498                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2499
2500         /* stop and reset the on-board processor */
2501         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2502
2503         /* tell the device to stop sending interrupts */
2504         spin_lock_irqsave(&priv->lock, flags);
2505         iwl_disable_interrupts(priv);
2506         spin_unlock_irqrestore(&priv->lock, flags);
2507         iwl_synchronize_irq(priv);
2508
2509         if (priv->mac80211_registered)
2510                 ieee80211_stop_queues(priv->hw);
2511
2512         /* If we have not previously called iwl3945_init() then
2513          * clear all bits but the RF Kill bits and return */
2514         if (!iwl_is_init(priv)) {
2515                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2516                                         STATUS_RF_KILL_HW |
2517                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2518                                         STATUS_GEO_CONFIGURED |
2519                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2520                                         STATUS_EXIT_PENDING;
2521                 goto exit;
2522         }
2523
2524         /* ...otherwise clear out all the status bits but the RF Kill
2525          * bit and continue taking the NIC down. */
2526         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2527                                 STATUS_RF_KILL_HW |
2528                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2529                                 STATUS_GEO_CONFIGURED |
2530                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2531                                 STATUS_FW_ERROR |
2532                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2533                                 STATUS_EXIT_PENDING;
2534
2535         priv->cfg->ops->lib->apm_ops.reset(priv);
2536         spin_lock_irqsave(&priv->lock, flags);
2537         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2538         spin_unlock_irqrestore(&priv->lock, flags);
2539
2540         iwl3945_hw_txq_ctx_stop(priv);
2541         iwl3945_hw_rxq_stop(priv);
2542
2543         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2544                                 APMG_CLK_VAL_DMA_CLK_RQT);
2545
2546         udelay(5);
2547
2548         if (exit_pending)
2549                 priv->cfg->ops->lib->apm_ops.stop(priv);
2550         else
2551                 priv->cfg->ops->lib->apm_ops.reset(priv);
2552
2553  exit:
2554         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2555
2556         if (priv->ibss_beacon)
2557                 dev_kfree_skb(priv->ibss_beacon);
2558         priv->ibss_beacon = NULL;
2559
2560         /* clear out any free frames */
2561         iwl3945_clear_free_frames(priv);
2562 }
2563
2564 static void iwl3945_down(struct iwl_priv *priv)
2565 {
2566         mutex_lock(&priv->mutex);
2567         __iwl3945_down(priv);
2568         mutex_unlock(&priv->mutex);
2569
2570         iwl3945_cancel_deferred_work(priv);
2571 }
2572
2573 #define MAX_HW_RESTARTS 5
2574
2575 static int __iwl3945_up(struct iwl_priv *priv)
2576 {
2577         int rc, i;
2578
2579         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2580                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2581                 return -EIO;
2582         }
2583
2584         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2585                 IWL_ERR(priv, "ucode not available for device bring up\n");
2586                 return -EIO;
2587         }
2588
2589         /* If platform's RF_KILL switch is NOT set to KILL */
2590         if (iwl_read32(priv, CSR_GP_CNTRL) &
2591                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2592                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2593         else {
2594                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2595                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2596                 return -ENODEV;
2597         }
2598
2599         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2600
2601         rc = iwl3945_hw_nic_init(priv);
2602         if (rc) {
2603                 IWL_ERR(priv, "Unable to int nic\n");
2604                 return rc;
2605         }
2606
2607         /* make sure rfkill handshake bits are cleared */
2608         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2609         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2610                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2611
2612         /* clear (again), then enable host interrupts */
2613         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2614         iwl_enable_interrupts(priv);
2615
2616         /* really make sure rfkill handshake bits are cleared */
2617         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2618         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2619
2620         /* Copy original ucode data image from disk into backup cache.
2621          * This will be used to initialize the on-board processor's
2622          * data SRAM for a clean start when the runtime program first loads. */
2623         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2624                priv->ucode_data.len);
2625
2626         /* We return success when we resume from suspend and rf_kill is on. */
2627         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2628                 return 0;
2629
2630         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2631
2632                 iwl_clear_stations_table(priv);
2633
2634                 /* load bootstrap state machine,
2635                  * load bootstrap program into processor's memory,
2636                  * prepare to load the "initialize" uCode */
2637                 priv->cfg->ops->lib->load_ucode(priv);
2638
2639                 if (rc) {
2640                         IWL_ERR(priv,
2641                                 "Unable to set up bootstrap uCode: %d\n", rc);
2642                         continue;
2643                 }
2644
2645                 /* start card; "initialize" will load runtime ucode */
2646                 iwl3945_nic_start(priv);
2647
2648                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2649
2650                 return 0;
2651         }
2652
2653         set_bit(STATUS_EXIT_PENDING, &priv->status);
2654         __iwl3945_down(priv);
2655         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2656
2657         /* tried to restart and config the device for as long as our
2658          * patience could withstand */
2659         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2660         return -EIO;
2661 }
2662
2663
2664 /*****************************************************************************
2665  *
2666  * Workqueue callbacks
2667  *
2668  *****************************************************************************/
2669
2670 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2671 {
2672         struct iwl_priv *priv =
2673             container_of(data, struct iwl_priv, init_alive_start.work);
2674
2675         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2676                 return;
2677
2678         mutex_lock(&priv->mutex);
2679         iwl3945_init_alive_start(priv);
2680         mutex_unlock(&priv->mutex);
2681 }
2682
2683 static void iwl3945_bg_alive_start(struct work_struct *data)
2684 {
2685         struct iwl_priv *priv =
2686             container_of(data, struct iwl_priv, alive_start.work);
2687
2688         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2689                 return;
2690
2691         mutex_lock(&priv->mutex);
2692         iwl3945_alive_start(priv);
2693         mutex_unlock(&priv->mutex);
2694 }
2695
2696 static void iwl3945_rfkill_poll(struct work_struct *data)
2697 {
2698         struct iwl_priv *priv =
2699             container_of(data, struct iwl_priv, rfkill_poll.work);
2700
2701         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2702                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2703         else
2704                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2705
2706         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2707                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2708
2709         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2710                            round_jiffies_relative(2 * HZ));
2711
2712 }
2713
2714 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2715 static void iwl3945_bg_request_scan(struct work_struct *data)
2716 {
2717         struct iwl_priv *priv =
2718             container_of(data, struct iwl_priv, request_scan);
2719         struct iwl_host_cmd cmd = {
2720                 .id = REPLY_SCAN_CMD,
2721                 .len = sizeof(struct iwl3945_scan_cmd),
2722                 .flags = CMD_SIZE_HUGE,
2723         };
2724         int rc = 0;
2725         struct iwl3945_scan_cmd *scan;
2726         struct ieee80211_conf *conf = NULL;
2727         u8 n_probes = 0;
2728         enum ieee80211_band band;
2729         bool is_active = false;
2730
2731         conf = ieee80211_get_hw_conf(priv->hw);
2732
2733         mutex_lock(&priv->mutex);
2734
2735         cancel_delayed_work(&priv->scan_check);
2736
2737         if (!iwl_is_ready(priv)) {
2738                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2739                 goto done;
2740         }
2741
2742         /* Make sure the scan wasn't canceled before this queued work
2743          * was given the chance to run... */
2744         if (!test_bit(STATUS_SCANNING, &priv->status))
2745                 goto done;
2746
2747         /* This should never be called or scheduled if there is currently
2748          * a scan active in the hardware. */
2749         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2750                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2751                                 "Ignoring second request.\n");
2752                 rc = -EIO;
2753                 goto done;
2754         }
2755
2756         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2757                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2758                 goto done;
2759         }
2760
2761         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2762                 IWL_DEBUG_HC(priv,
2763                         "Scan request while abort pending. Queuing.\n");
2764                 goto done;
2765         }
2766
2767         if (iwl_is_rfkill(priv)) {
2768                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2769                 goto done;
2770         }
2771
2772         if (!test_bit(STATUS_READY, &priv->status)) {
2773                 IWL_DEBUG_HC(priv,
2774                         "Scan request while uninitialized. Queuing.\n");
2775                 goto done;
2776         }
2777
2778         if (!priv->scan_bands) {
2779                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2780                 goto done;
2781         }
2782
2783         if (!priv->scan) {
2784                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2785                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2786                 if (!priv->scan) {
2787                         rc = -ENOMEM;
2788                         goto done;
2789                 }
2790         }
2791         scan = priv->scan;
2792         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2793
2794         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2795         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2796
2797         if (iwl_is_associated(priv)) {
2798                 u16 interval = 0;
2799                 u32 extra;
2800                 u32 suspend_time = 100;
2801                 u32 scan_suspend_time = 100;
2802                 unsigned long flags;
2803
2804                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2805
2806                 spin_lock_irqsave(&priv->lock, flags);
2807                 interval = priv->beacon_int;
2808                 spin_unlock_irqrestore(&priv->lock, flags);
2809
2810                 scan->suspend_time = 0;
2811                 scan->max_out_time = cpu_to_le32(200 * 1024);
2812                 if (!interval)
2813                         interval = suspend_time;
2814                 /*
2815                  * suspend time format:
2816                  *  0-19: beacon interval in usec (time before exec.)
2817                  * 20-23: 0
2818                  * 24-31: number of beacons (suspend between channels)
2819                  */
2820
2821                 extra = (suspend_time / interval) << 24;
2822                 scan_suspend_time = 0xFF0FFFFF &
2823                     (extra | ((suspend_time % interval) * 1024));
2824
2825                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2826                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2827                                scan_suspend_time, interval);
2828         }
2829
2830         if (priv->scan_request->n_ssids) {
2831                 int i, p = 0;
2832                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2833                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2834                         /* always does wildcard anyway */
2835                         if (!priv->scan_request->ssids[i].ssid_len)
2836                                 continue;
2837                         scan->direct_scan[p].id = WLAN_EID_SSID;
2838                         scan->direct_scan[p].len =
2839                                 priv->scan_request->ssids[i].ssid_len;
2840                         memcpy(scan->direct_scan[p].ssid,
2841                                priv->scan_request->ssids[i].ssid,
2842                                priv->scan_request->ssids[i].ssid_len);
2843                         n_probes++;
2844                         p++;
2845                 }
2846                 is_active = true;
2847         } else
2848                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2849
2850         /* We don't build a direct scan probe request; the uCode will do
2851          * that based on the direct_mask added to each channel entry */
2852         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2853         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2854         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2855
2856         /* flags + rate selection */
2857
2858         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2859                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2860                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2861                 scan->good_CRC_th = 0;
2862                 band = IEEE80211_BAND_2GHZ;
2863         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2864                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2865                 /*
2866                  * If active scaning is requested but a certain channel
2867                  * is marked passive, we can do active scanning if we
2868                  * detect transmissions.
2869                  */
2870                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2871                 band = IEEE80211_BAND_5GHZ;
2872         } else {
2873                 IWL_WARN(priv, "Invalid scan band count\n");
2874                 goto done;
2875         }
2876
2877         scan->tx_cmd.len = cpu_to_le16(
2878                         iwl_fill_probe_req(priv,
2879                                 (struct ieee80211_mgmt *)scan->data,
2880                                 priv->scan_request->ie,
2881                                 priv->scan_request->ie_len,
2882                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2883
2884         /* select Rx antennas */
2885         scan->flags |= iwl3945_get_antenna_flags(priv);
2886
2887         if (iwl_is_monitor_mode(priv))
2888                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2889
2890         scan->channel_count =
2891                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2892                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2893
2894         if (scan->channel_count == 0) {
2895                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2896                 goto done;
2897         }
2898
2899         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2900             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2901         cmd.data = scan;
2902         scan->len = cpu_to_le16(cmd.len);
2903
2904         set_bit(STATUS_SCAN_HW, &priv->status);
2905         rc = iwl_send_cmd_sync(priv, &cmd);
2906         if (rc)
2907                 goto done;
2908
2909         queue_delayed_work(priv->workqueue, &priv->scan_check,
2910                            IWL_SCAN_CHECK_WATCHDOG);
2911
2912         mutex_unlock(&priv->mutex);
2913         return;
2914
2915  done:
2916         /* can not perform scan make sure we clear scanning
2917          * bits from status so next scan request can be performed.
2918          * if we dont clear scanning status bit here all next scan
2919          * will fail
2920         */
2921         clear_bit(STATUS_SCAN_HW, &priv->status);
2922         clear_bit(STATUS_SCANNING, &priv->status);
2923
2924         /* inform mac80211 scan aborted */
2925         queue_work(priv->workqueue, &priv->scan_completed);
2926         mutex_unlock(&priv->mutex);
2927 }
2928
2929 static void iwl3945_bg_up(struct work_struct *data)
2930 {
2931         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2932
2933         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2934                 return;
2935
2936         mutex_lock(&priv->mutex);
2937         __iwl3945_up(priv);
2938         mutex_unlock(&priv->mutex);
2939 }
2940
2941 static void iwl3945_bg_restart(struct work_struct *data)
2942 {
2943         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2944
2945         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2946                 return;
2947
2948         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2949                 mutex_lock(&priv->mutex);
2950                 priv->vif = NULL;
2951                 priv->is_open = 0;
2952                 mutex_unlock(&priv->mutex);
2953                 iwl3945_down(priv);
2954                 ieee80211_restart_hw(priv->hw);
2955         } else {
2956                 iwl3945_down(priv);
2957                 queue_work(priv->workqueue, &priv->up);
2958         }
2959 }
2960
2961 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2962 {
2963         struct iwl_priv *priv =
2964             container_of(data, struct iwl_priv, rx_replenish);
2965
2966         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2967                 return;
2968
2969         mutex_lock(&priv->mutex);
2970         iwl3945_rx_replenish(priv);
2971         mutex_unlock(&priv->mutex);
2972 }
2973
2974 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2975
2976 void iwl3945_post_associate(struct iwl_priv *priv)
2977 {
2978         int rc = 0;
2979         struct ieee80211_conf *conf = NULL;
2980
2981         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2982                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2983                 return;
2984         }
2985
2986
2987         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2988                         priv->assoc_id, priv->active_rxon.bssid_addr);
2989
2990         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2991                 return;
2992
2993         if (!priv->vif || !priv->is_open)
2994                 return;
2995
2996         iwl_scan_cancel_timeout(priv, 200);
2997
2998         conf = ieee80211_get_hw_conf(priv->hw);
2999
3000         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3001         iwlcore_commit_rxon(priv);
3002
3003         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3004         iwl_setup_rxon_timing(priv);
3005         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3006                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3007         if (rc)
3008                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3009                             "Attempting to continue.\n");
3010
3011         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3012
3013         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3014
3015         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3016                         priv->assoc_id, priv->beacon_int);
3017
3018         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3019                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3020         else
3021                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3022
3023         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3024                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3025                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3026                 else
3027                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3028
3029                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3030                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3031
3032         }
3033
3034         iwlcore_commit_rxon(priv);
3035
3036         switch (priv->iw_mode) {
3037         case NL80211_IFTYPE_STATION:
3038                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3039                 break;
3040
3041         case NL80211_IFTYPE_ADHOC:
3042
3043                 priv->assoc_id = 1;
3044                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3045                 iwl3945_sync_sta(priv, IWL_STA_ID,
3046                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3047                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3048                                  CMD_ASYNC);
3049                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3050                 iwl3945_send_beacon_cmd(priv);
3051
3052                 break;
3053
3054         default:
3055                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3056                            __func__, priv->iw_mode);
3057                 break;
3058         }
3059
3060         iwl_activate_qos(priv, 0);
3061
3062         /* we have just associated, don't start scan too early */
3063         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3064 }
3065
3066 /*****************************************************************************
3067  *
3068  * mac80211 entry point functions
3069  *
3070  *****************************************************************************/
3071
3072 #define UCODE_READY_TIMEOUT     (2 * HZ)
3073
3074 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3075 {
3076         struct iwl_priv *priv = hw->priv;
3077         int ret;
3078
3079         IWL_DEBUG_MAC80211(priv, "enter\n");
3080
3081         /* we should be verifying the device is ready to be opened */
3082         mutex_lock(&priv->mutex);
3083
3084         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3085          * ucode filename and max sizes are card-specific. */
3086
3087         if (!priv->ucode_code.len) {
3088                 ret = iwl3945_read_ucode(priv);
3089                 if (ret) {
3090                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3091                         mutex_unlock(&priv->mutex);
3092                         goto out_release_irq;
3093                 }
3094         }
3095
3096         ret = __iwl3945_up(priv);
3097
3098         mutex_unlock(&priv->mutex);
3099
3100         if (ret)
3101                 goto out_release_irq;
3102
3103         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3104
3105         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3106          * mac80211 will not be run successfully. */
3107         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3108                         test_bit(STATUS_READY, &priv->status),
3109                         UCODE_READY_TIMEOUT);
3110         if (!ret) {
3111                 if (!test_bit(STATUS_READY, &priv->status)) {
3112                         IWL_ERR(priv,
3113                                 "Wait for START_ALIVE timeout after %dms.\n",
3114                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3115                         ret = -ETIMEDOUT;
3116                         goto out_release_irq;
3117                 }
3118         }
3119
3120         /* ucode is running and will send rfkill notifications,
3121          * no need to poll the killswitch state anymore */
3122         cancel_delayed_work(&priv->rfkill_poll);
3123
3124         priv->is_open = 1;
3125         IWL_DEBUG_MAC80211(priv, "leave\n");
3126         return 0;
3127
3128 out_release_irq:
3129         priv->is_open = 0;
3130         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3131         return ret;
3132 }
3133
3134 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3135 {
3136         struct iwl_priv *priv = hw->priv;
3137
3138         IWL_DEBUG_MAC80211(priv, "enter\n");
3139
3140         if (!priv->is_open) {
3141                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3142                 return;
3143         }
3144
3145         priv->is_open = 0;
3146
3147         if (iwl_is_ready_rf(priv)) {
3148                 /* stop mac, cancel any scan request and clear
3149                  * RXON_FILTER_ASSOC_MSK BIT
3150                  */
3151                 mutex_lock(&priv->mutex);
3152                 iwl_scan_cancel_timeout(priv, 100);
3153                 mutex_unlock(&priv->mutex);
3154         }
3155
3156         iwl3945_down(priv);
3157
3158         flush_workqueue(priv->workqueue);
3159
3160         /* start polling the killswitch state again */
3161         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3162                            round_jiffies_relative(2 * HZ));
3163
3164         IWL_DEBUG_MAC80211(priv, "leave\n");
3165 }
3166
3167 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3168 {
3169         struct iwl_priv *priv = hw->priv;
3170
3171         IWL_DEBUG_MAC80211(priv, "enter\n");
3172
3173         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3174                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3175
3176         if (iwl3945_tx_skb(priv, skb))
3177                 dev_kfree_skb_any(skb);
3178
3179         IWL_DEBUG_MAC80211(priv, "leave\n");
3180         return NETDEV_TX_OK;
3181 }
3182
3183 void iwl3945_config_ap(struct iwl_priv *priv)
3184 {
3185         int rc = 0;
3186
3187         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3188                 return;
3189
3190         /* The following should be done only at AP bring up */
3191         if (!(iwl_is_associated(priv))) {
3192
3193                 /* RXON - unassoc (to set timing command) */
3194                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3195                 iwlcore_commit_rxon(priv);
3196
3197                 /* RXON Timing */
3198                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3199                 iwl_setup_rxon_timing(priv);
3200                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3201                                       sizeof(priv->rxon_timing),
3202                                       &priv->rxon_timing);
3203                 if (rc)
3204                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3205                                         "Attempting to continue.\n");
3206
3207                 /* FIXME: what should be the assoc_id for AP? */
3208                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3209                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3210                         priv->staging_rxon.flags |=
3211                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3212                 else
3213                         priv->staging_rxon.flags &=
3214                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3215
3216                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3217                         if (priv->assoc_capability &
3218                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3219                                 priv->staging_rxon.flags |=
3220                                         RXON_FLG_SHORT_SLOT_MSK;
3221                         else
3222                                 priv->staging_rxon.flags &=
3223                                         ~RXON_FLG_SHORT_SLOT_MSK;
3224
3225                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3226                                 priv->staging_rxon.flags &=
3227                                         ~RXON_FLG_SHORT_SLOT_MSK;
3228                 }
3229                 /* restore RXON assoc */
3230                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3231                 iwlcore_commit_rxon(priv);
3232                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3233         }
3234         iwl3945_send_beacon_cmd(priv);
3235
3236         /* FIXME - we need to add code here to detect a totally new
3237          * configuration, reset the AP, unassoc, rxon timing, assoc,
3238          * clear sta table, add BCAST sta... */
3239 }
3240
3241 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3242                                struct ieee80211_vif *vif,
3243                                struct ieee80211_sta *sta,
3244                                struct ieee80211_key_conf *key)
3245 {
3246         struct iwl_priv *priv = hw->priv;
3247         const u8 *addr;
3248         int ret = 0;
3249         u8 sta_id = IWL_INVALID_STATION;
3250         u8 static_key;
3251
3252         IWL_DEBUG_MAC80211(priv, "enter\n");
3253
3254         if (iwl3945_mod_params.sw_crypto) {
3255                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3256                 return -EOPNOTSUPP;
3257         }
3258
3259         addr = sta ? sta->addr : iwl_bcast_addr;
3260         static_key = !iwl_is_associated(priv);
3261
3262         if (!static_key) {
3263                 sta_id = iwl_find_station(priv, addr);
3264                 if (sta_id == IWL_INVALID_STATION) {
3265                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3266                                             addr);
3267                         return -EINVAL;
3268                 }
3269         }
3270
3271         mutex_lock(&priv->mutex);
3272         iwl_scan_cancel_timeout(priv, 100);
3273         mutex_unlock(&priv->mutex);
3274
3275         switch (cmd) {
3276         case SET_KEY:
3277                 if (static_key)
3278                         ret = iwl3945_set_static_key(priv, key);
3279                 else
3280                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3281                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3282                 break;
3283         case DISABLE_KEY:
3284                 if (static_key)
3285                         ret = iwl3945_remove_static_key(priv);
3286                 else
3287                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3288                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3289                 break;
3290         default:
3291                 ret = -EINVAL;
3292         }
3293
3294         IWL_DEBUG_MAC80211(priv, "leave\n");
3295
3296         return ret;
3297 }
3298
3299 /*****************************************************************************
3300  *
3301  * sysfs attributes
3302  *
3303  *****************************************************************************/
3304
3305 #ifdef CONFIG_IWLWIFI_DEBUG
3306
3307 /*
3308  * The following adds a new attribute to the sysfs representation
3309  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3310  * used for controlling the debug level.
3311  *
3312  * See the level definitions in iwl for details.
3313  *
3314  * The debug_level being managed using sysfs below is a per device debug
3315  * level that is used instead of the global debug level if it (the per
3316  * device debug level) is set.
3317  */
3318 static ssize_t show_debug_level(struct device *d,
3319                                 struct device_attribute *attr, char *buf)
3320 {
3321         struct iwl_priv *priv = dev_get_drvdata(d);
3322         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3323 }
3324 static ssize_t store_debug_level(struct device *d,
3325                                 struct device_attribute *attr,
3326                                  const char *buf, size_t count)
3327 {
3328         struct iwl_priv *priv = dev_get_drvdata(d);
3329         unsigned long val;
3330         int ret;
3331
3332         ret = strict_strtoul(buf, 0, &val);
3333         if (ret)
3334                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3335         else
3336                 priv->debug_level = val;
3337
3338         return strnlen(buf, count);
3339 }
3340
3341 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3342                         show_debug_level, store_debug_level);
3343
3344 #endif /* CONFIG_IWLWIFI_DEBUG */
3345
3346 static ssize_t show_temperature(struct device *d,
3347                                 struct device_attribute *attr, char *buf)
3348 {
3349         struct iwl_priv *priv = dev_get_drvdata(d);
3350
3351         if (!iwl_is_alive(priv))
3352                 return -EAGAIN;
3353
3354         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3355 }
3356
3357 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3358
3359 static ssize_t show_tx_power(struct device *d,
3360                              struct device_attribute *attr, char *buf)
3361 {
3362         struct iwl_priv *priv = dev_get_drvdata(d);
3363         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3364 }
3365
3366 static ssize_t store_tx_power(struct device *d,
3367                               struct device_attribute *attr,
3368                               const char *buf, size_t count)
3369 {
3370         struct iwl_priv *priv = dev_get_drvdata(d);
3371         char *p = (char *)buf;
3372         u32 val;
3373
3374         val = simple_strtoul(p, &p, 10);
3375         if (p == buf)
3376                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3377         else
3378                 iwl3945_hw_reg_set_txpower(priv, val);
3379
3380         return count;
3381 }
3382
3383 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3384
3385 static ssize_t show_flags(struct device *d,
3386                           struct device_attribute *attr, char *buf)
3387 {
3388         struct iwl_priv *priv = dev_get_drvdata(d);
3389
3390         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3391 }
3392
3393 static ssize_t store_flags(struct device *d,
3394                            struct device_attribute *attr,
3395                            const char *buf, size_t count)
3396 {
3397         struct iwl_priv *priv = dev_get_drvdata(d);
3398         u32 flags = simple_strtoul(buf, NULL, 0);
3399
3400         mutex_lock(&priv->mutex);
3401         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3402                 /* Cancel any currently running scans... */
3403                 if (iwl_scan_cancel_timeout(priv, 100))
3404                         IWL_WARN(priv, "Could not cancel scan.\n");
3405                 else {
3406                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3407                                        flags);
3408                         priv->staging_rxon.flags = cpu_to_le32(flags);
3409                         iwlcore_commit_rxon(priv);
3410                 }
3411         }
3412         mutex_unlock(&priv->mutex);
3413
3414         return count;
3415 }
3416
3417 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3418
3419 static ssize_t show_filter_flags(struct device *d,
3420                                  struct device_attribute *attr, char *buf)
3421 {
3422         struct iwl_priv *priv = dev_get_drvdata(d);
3423
3424         return sprintf(buf, "0x%04X\n",
3425                 le32_to_cpu(priv->active_rxon.filter_flags));
3426 }
3427
3428 static ssize_t store_filter_flags(struct device *d,
3429                                   struct device_attribute *attr,
3430                                   const char *buf, size_t count)
3431 {
3432         struct iwl_priv *priv = dev_get_drvdata(d);
3433         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3434
3435         mutex_lock(&priv->mutex);
3436         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3437                 /* Cancel any currently running scans... */
3438                 if (iwl_scan_cancel_timeout(priv, 100))
3439                         IWL_WARN(priv, "Could not cancel scan.\n");
3440                 else {
3441                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3442                                        "0x%04X\n", filter_flags);
3443                         priv->staging_rxon.filter_flags =
3444                                 cpu_to_le32(filter_flags);
3445                         iwlcore_commit_rxon(priv);
3446                 }
3447         }
3448         mutex_unlock(&priv->mutex);
3449
3450         return count;
3451 }
3452
3453 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3454                    store_filter_flags);
3455
3456 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3457
3458 static ssize_t show_measurement(struct device *d,
3459                                 struct device_attribute *attr, char *buf)
3460 {
3461         struct iwl_priv *priv = dev_get_drvdata(d);
3462         struct iwl_spectrum_notification measure_report;
3463         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3464         u8 *data = (u8 *)&measure_report;
3465         unsigned long flags;
3466
3467         spin_lock_irqsave(&priv->lock, flags);
3468         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3469                 spin_unlock_irqrestore(&priv->lock, flags);
3470                 return 0;
3471         }
3472         memcpy(&measure_report, &priv->measure_report, size);
3473         priv->measurement_status = 0;
3474         spin_unlock_irqrestore(&priv->lock, flags);
3475
3476         while (size && (PAGE_SIZE - len)) {
3477                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3478                                    PAGE_SIZE - len, 1);
3479                 len = strlen(buf);
3480                 if (PAGE_SIZE - len)
3481                         buf[len++] = '\n';
3482
3483                 ofs += 16;
3484                 size -= min(size, 16U);
3485         }
3486
3487         return len;
3488 }
3489
3490 static ssize_t store_measurement(struct device *d,
3491                                  struct device_attribute *attr,
3492                                  const char *buf, size_t count)
3493 {
3494         struct iwl_priv *priv = dev_get_drvdata(d);
3495         struct ieee80211_measurement_params params = {
3496                 .channel = le16_to_cpu(priv->active_rxon.channel),
3497                 .start_time = cpu_to_le64(priv->last_tsf),
3498                 .duration = cpu_to_le16(1),
3499         };
3500         u8 type = IWL_MEASURE_BASIC;
3501         u8 buffer[32];
3502         u8 channel;
3503
3504         if (count) {
3505                 char *p = buffer;
3506                 strncpy(buffer, buf, min(sizeof(buffer), count));
3507                 channel = simple_strtoul(p, NULL, 0);
3508                 if (channel)
3509                         params.channel = channel;
3510
3511                 p = buffer;
3512                 while (*p && *p != ' ')
3513                         p++;
3514                 if (*p)
3515                         type = simple_strtoul(p + 1, NULL, 0);
3516         }
3517
3518         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3519                        "channel %d (for '%s')\n", type, params.channel, buf);
3520         iwl3945_get_measurement(priv, &params, type);
3521
3522         return count;
3523 }
3524
3525 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3526                    show_measurement, store_measurement);
3527 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3528
3529 static ssize_t store_retry_rate(struct device *d,
3530                                 struct device_attribute *attr,
3531                                 const char *buf, size_t count)
3532 {
3533         struct iwl_priv *priv = dev_get_drvdata(d);
3534
3535         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3536         if (priv->retry_rate <= 0)
3537                 priv->retry_rate = 1;
3538
3539         return count;
3540 }
3541
3542 static ssize_t show_retry_rate(struct device *d,
3543                                struct device_attribute *attr, char *buf)
3544 {
3545         struct iwl_priv *priv = dev_get_drvdata(d);
3546         return sprintf(buf, "%d", priv->retry_rate);
3547 }
3548
3549 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3550                    store_retry_rate);
3551
3552
3553 static ssize_t store_power_level(struct device *d,
3554                                  struct device_attribute *attr,
3555                                  const char *buf, size_t count)
3556 {
3557         struct iwl_priv *priv = dev_get_drvdata(d);
3558         int ret;
3559         unsigned long mode;
3560
3561
3562         mutex_lock(&priv->mutex);
3563
3564         ret = strict_strtoul(buf, 10, &mode);
3565         if (ret)
3566                 goto out;
3567
3568         ret = iwl_power_set_user_mode(priv, mode);
3569         if (ret) {
3570                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3571                 goto out;
3572         }
3573         ret = count;
3574
3575  out:
3576         mutex_unlock(&priv->mutex);
3577         return ret;
3578 }
3579
3580 static ssize_t show_power_level(struct device *d,
3581                                 struct device_attribute *attr, char *buf)
3582 {
3583         struct iwl_priv *priv = dev_get_drvdata(d);
3584         int level = priv->power_data.power_mode;
3585         char *p = buf;
3586
3587         p += sprintf(p, "%d\n", level);
3588         return p - buf + 1;
3589 }
3590
3591 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3592                    show_power_level, store_power_level);
3593
3594 #define MAX_WX_STRING 80
3595
3596 /* Values are in microsecond */
3597 static const s32 timeout_duration[] = {
3598         350000,
3599         250000,
3600         75000,
3601         37000,
3602         25000,
3603 };
3604 static const s32 period_duration[] = {
3605         400000,
3606         700000,
3607         1000000,
3608         1000000,
3609         1000000
3610 };
3611
3612 static ssize_t show_channels(struct device *d,
3613                              struct device_attribute *attr, char *buf)
3614 {
3615         /* all this shit doesn't belong into sysfs anyway */
3616         return 0;
3617 }
3618
3619 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3620
3621 static ssize_t show_statistics(struct device *d,
3622                                struct device_attribute *attr, char *buf)
3623 {
3624         struct iwl_priv *priv = dev_get_drvdata(d);
3625         u32 size = sizeof(struct iwl3945_notif_statistics);
3626         u32 len = 0, ofs = 0;
3627         u8 *data = (u8 *)&priv->statistics_39;
3628         int rc = 0;
3629
3630         if (!iwl_is_alive(priv))
3631                 return -EAGAIN;
3632
3633         mutex_lock(&priv->mutex);
3634         rc = iwl_send_statistics_request(priv, 0);
3635         mutex_unlock(&priv->mutex);
3636
3637         if (rc) {
3638                 len = sprintf(buf,
3639                               "Error sending statistics request: 0x%08X\n", rc);
3640                 return len;
3641         }
3642
3643         while (size && (PAGE_SIZE - len)) {
3644                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3645                                    PAGE_SIZE - len, 1);
3646                 len = strlen(buf);
3647                 if (PAGE_SIZE - len)
3648                         buf[len++] = '\n';
3649
3650                 ofs += 16;
3651                 size -= min(size, 16U);
3652         }
3653
3654         return len;
3655 }
3656
3657 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3658
3659 static ssize_t show_antenna(struct device *d,
3660                             struct device_attribute *attr, char *buf)
3661 {
3662         struct iwl_priv *priv = dev_get_drvdata(d);
3663
3664         if (!iwl_is_alive(priv))
3665                 return -EAGAIN;
3666
3667         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3668 }
3669
3670 static ssize_t store_antenna(struct device *d,
3671                              struct device_attribute *attr,
3672                              const char *buf, size_t count)
3673 {
3674         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3675         int ant;
3676
3677         if (count == 0)
3678                 return 0;
3679
3680         if (sscanf(buf, "%1i", &ant) != 1) {
3681                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3682                 return count;
3683         }
3684
3685         if ((ant >= 0) && (ant <= 2)) {
3686                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3687                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3688         } else
3689                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3690
3691
3692         return count;
3693 }
3694
3695 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3696
3697 static ssize_t show_status(struct device *d,
3698                            struct device_attribute *attr, char *buf)
3699 {
3700         struct iwl_priv *priv = dev_get_drvdata(d);
3701         if (!iwl_is_alive(priv))
3702                 return -EAGAIN;
3703         return sprintf(buf, "0x%08x\n", (int)priv->status);
3704 }
3705
3706 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3707
3708 static ssize_t dump_error_log(struct device *d,
3709                               struct device_attribute *attr,
3710                               const char *buf, size_t count)
3711 {
3712         struct iwl_priv *priv = dev_get_drvdata(d);
3713         char *p = (char *)buf;
3714
3715         if (p[0] == '1')
3716                 iwl3945_dump_nic_error_log(priv);
3717
3718         return strnlen(buf, count);
3719 }
3720
3721 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3722
3723 static ssize_t dump_event_log(struct device *d,
3724                               struct device_attribute *attr,
3725                               const char *buf, size_t count)
3726 {
3727         struct iwl_priv *priv = dev_get_drvdata(d);
3728         char *p = (char *)buf;
3729
3730         if (p[0] == '1')
3731                 iwl3945_dump_nic_event_log(priv);
3732
3733         return strnlen(buf, count);
3734 }
3735
3736 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
3737
3738 /*****************************************************************************
3739  *
3740  * driver setup and tear down
3741  *
3742  *****************************************************************************/
3743
3744 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3745 {
3746         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3747
3748         init_waitqueue_head(&priv->wait_command_queue);
3749
3750         INIT_WORK(&priv->up, iwl3945_bg_up);
3751         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3752         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3753         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3754         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3755         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3756         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3757         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3758         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3759         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3760         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3761
3762         iwl3945_hw_setup_deferred_work(priv);
3763
3764         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3765                      iwl3945_irq_tasklet, (unsigned long)priv);
3766 }
3767
3768 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3769 {
3770         iwl3945_hw_cancel_deferred_work(priv);
3771
3772         cancel_delayed_work_sync(&priv->init_alive_start);
3773         cancel_delayed_work(&priv->scan_check);
3774         cancel_delayed_work(&priv->alive_start);
3775         cancel_work_sync(&priv->beacon_update);
3776 }
3777
3778 static struct attribute *iwl3945_sysfs_entries[] = {
3779         &dev_attr_antenna.attr,
3780         &dev_attr_channels.attr,
3781         &dev_attr_dump_errors.attr,
3782         &dev_attr_dump_events.attr,
3783         &dev_attr_flags.attr,
3784         &dev_attr_filter_flags.attr,
3785 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3786         &dev_attr_measurement.attr,
3787 #endif
3788         &dev_attr_power_level.attr,
3789         &dev_attr_retry_rate.attr,
3790         &dev_attr_statistics.attr,
3791         &dev_attr_status.attr,
3792         &dev_attr_temperature.attr,
3793         &dev_attr_tx_power.attr,
3794 #ifdef CONFIG_IWLWIFI_DEBUG
3795         &dev_attr_debug_level.attr,
3796 #endif
3797         NULL
3798 };
3799
3800 static struct attribute_group iwl3945_attribute_group = {
3801         .name = NULL,           /* put in device directory */
3802         .attrs = iwl3945_sysfs_entries,
3803 };
3804
3805 static struct ieee80211_ops iwl3945_hw_ops = {
3806         .tx = iwl3945_mac_tx,
3807         .start = iwl3945_mac_start,
3808         .stop = iwl3945_mac_stop,
3809         .add_interface = iwl_mac_add_interface,
3810         .remove_interface = iwl_mac_remove_interface,
3811         .config = iwl_mac_config,
3812         .configure_filter = iwl_configure_filter,
3813         .set_key = iwl3945_mac_set_key,
3814         .get_tx_stats = iwl_mac_get_tx_stats,
3815         .conf_tx = iwl_mac_conf_tx,
3816         .reset_tsf = iwl_mac_reset_tsf,
3817         .bss_info_changed = iwl_bss_info_changed,
3818         .hw_scan = iwl_mac_hw_scan
3819 };
3820
3821 static int iwl3945_init_drv(struct iwl_priv *priv)
3822 {
3823         int ret;
3824         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3825
3826         priv->retry_rate = 1;
3827         priv->ibss_beacon = NULL;
3828
3829         spin_lock_init(&priv->lock);
3830         spin_lock_init(&priv->sta_lock);
3831         spin_lock_init(&priv->hcmd_lock);
3832
3833         INIT_LIST_HEAD(&priv->free_frames);
3834
3835         mutex_init(&priv->mutex);
3836
3837         /* Clear the driver's (not device's) station table */
3838         iwl_clear_stations_table(priv);
3839
3840         priv->data_retry_limit = -1;
3841         priv->ieee_channels = NULL;
3842         priv->ieee_rates = NULL;
3843         priv->band = IEEE80211_BAND_2GHZ;
3844
3845         priv->iw_mode = NL80211_IFTYPE_STATION;
3846
3847         iwl_reset_qos(priv);
3848
3849         priv->qos_data.qos_active = 0;
3850         priv->qos_data.qos_cap.val = 0;
3851
3852         priv->rates_mask = IWL_RATES_MASK;
3853         /* If power management is turned on, default to CAM mode */
3854         priv->power_mode = IWL_POWER_MODE_CAM;
3855         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3856
3857         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3858                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3859                          eeprom->version);
3860                 ret = -EINVAL;
3861                 goto err;
3862         }
3863         ret = iwl_init_channel_map(priv);
3864         if (ret) {
3865                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3866                 goto err;
3867         }
3868
3869         /* Set up txpower settings in driver for all channels */
3870         if (iwl3945_txpower_set_from_eeprom(priv)) {
3871                 ret = -EIO;
3872                 goto err_free_channel_map;
3873         }
3874
3875         ret = iwlcore_init_geos(priv);
3876         if (ret) {
3877                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3878                 goto err_free_channel_map;
3879         }
3880         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3881
3882         return 0;
3883
3884 err_free_channel_map:
3885         iwl_free_channel_map(priv);
3886 err:
3887         return ret;
3888 }
3889
3890 static int iwl3945_setup_mac(struct iwl_priv *priv)
3891 {
3892         int ret;
3893         struct ieee80211_hw *hw = priv->hw;
3894
3895         hw->rate_control_algorithm = "iwl-3945-rs";
3896         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3897
3898         /* Tell mac80211 our characteristics */
3899         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3900                     IEEE80211_HW_NOISE_DBM |
3901                     IEEE80211_HW_SPECTRUM_MGMT;
3902
3903         hw->wiphy->interface_modes =
3904                 BIT(NL80211_IFTYPE_STATION) |
3905                 BIT(NL80211_IFTYPE_ADHOC);
3906
3907         hw->wiphy->custom_regulatory = true;
3908
3909         /* Firmware does not support this */
3910         hw->wiphy->disable_beacon_hints = true;
3911
3912         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3913         /* we create the 802.11 header and a zero-length SSID element */
3914         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3915
3916         /* Default value; 4 EDCA QOS priorities */
3917         hw->queues = 4;
3918
3919         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3920                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3921                         &priv->bands[IEEE80211_BAND_2GHZ];
3922
3923         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3924                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3925                         &priv->bands[IEEE80211_BAND_5GHZ];
3926
3927         ret = ieee80211_register_hw(priv->hw);
3928         if (ret) {
3929                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3930                 return ret;
3931         }
3932         priv->mac80211_registered = 1;
3933
3934         return 0;
3935 }
3936
3937 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3938 {
3939         int err = 0;
3940         struct iwl_priv *priv;
3941         struct ieee80211_hw *hw;
3942         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3943         struct iwl3945_eeprom *eeprom;
3944         unsigned long flags;
3945
3946         /***********************
3947          * 1. Allocating HW data
3948          * ********************/
3949
3950         /* mac80211 allocates memory for this device instance, including
3951          *   space for this driver's private structure */
3952         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3953         if (hw == NULL) {
3954                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3955                 err = -ENOMEM;
3956                 goto out;
3957         }
3958         priv = hw->priv;
3959         SET_IEEE80211_DEV(hw, &pdev->dev);
3960
3961         /*
3962          * Disabling hardware scan means that mac80211 will perform scans
3963          * "the hard way", rather than using device's scan.
3964          */
3965         if (iwl3945_mod_params.disable_hw_scan) {
3966                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3967                 iwl3945_hw_ops.hw_scan = NULL;
3968         }
3969
3970
3971         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3972         priv->cfg = cfg;
3973         priv->pci_dev = pdev;
3974         priv->inta_mask = CSR_INI_SET_MASK;
3975
3976 #ifdef CONFIG_IWLWIFI_DEBUG
3977         atomic_set(&priv->restrict_refcnt, 0);
3978 #endif
3979
3980         /***************************
3981          * 2. Initializing PCI bus
3982          * *************************/
3983         if (pci_enable_device(pdev)) {
3984                 err = -ENODEV;
3985                 goto out_ieee80211_free_hw;
3986         }
3987
3988         pci_set_master(pdev);
3989
3990         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3991         if (!err)
3992                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3993         if (err) {
3994                 IWL_WARN(priv, "No suitable DMA available.\n");
3995                 goto out_pci_disable_device;
3996         }
3997
3998         pci_set_drvdata(pdev, priv);
3999         err = pci_request_regions(pdev, DRV_NAME);
4000         if (err)
4001                 goto out_pci_disable_device;
4002
4003         /***********************
4004          * 3. Read REV Register
4005          * ********************/
4006         priv->hw_base = pci_iomap(pdev, 0, 0);
4007         if (!priv->hw_base) {
4008                 err = -ENODEV;
4009                 goto out_pci_release_regions;
4010         }
4011
4012         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4013                         (unsigned long long) pci_resource_len(pdev, 0));
4014         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4015
4016         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4017          * PCI Tx retries from interfering with C3 CPU state */
4018         pci_write_config_byte(pdev, 0x41, 0x00);
4019
4020         /* this spin lock will be used in apm_ops.init and EEPROM access
4021          * we should init now
4022          */
4023         spin_lock_init(&priv->reg_lock);
4024
4025         /* amp init */
4026         err = priv->cfg->ops->lib->apm_ops.init(priv);
4027         if (err < 0) {
4028                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4029                 goto out_iounmap;
4030         }
4031
4032         /***********************
4033          * 4. Read EEPROM
4034          * ********************/
4035
4036         /* Read the EEPROM */
4037         err = iwl_eeprom_init(priv);
4038         if (err) {
4039                 IWL_ERR(priv, "Unable to init EEPROM\n");
4040                 goto out_iounmap;
4041         }
4042         /* MAC Address location in EEPROM same for 3945/4965 */
4043         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4044         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4045         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4046         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4047
4048         /***********************
4049          * 5. Setup HW Constants
4050          * ********************/
4051         /* Device-specific setup */
4052         if (iwl3945_hw_set_hw_params(priv)) {
4053                 IWL_ERR(priv, "failed to set hw settings\n");
4054                 goto out_eeprom_free;
4055         }
4056
4057         /***********************
4058          * 6. Setup priv
4059          * ********************/
4060
4061         err = iwl3945_init_drv(priv);
4062         if (err) {
4063                 IWL_ERR(priv, "initializing driver failed\n");
4064                 goto out_unset_hw_params;
4065         }
4066
4067         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4068                 priv->cfg->name);
4069
4070         /***********************
4071          * 7. Setup Services
4072          * ********************/
4073
4074         spin_lock_irqsave(&priv->lock, flags);
4075         iwl_disable_interrupts(priv);
4076         spin_unlock_irqrestore(&priv->lock, flags);
4077
4078         pci_enable_msi(priv->pci_dev);
4079
4080         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4081                           IRQF_SHARED, DRV_NAME, priv);
4082         if (err) {
4083                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4084                 goto out_disable_msi;
4085         }
4086
4087         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4088         if (err) {
4089                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4090                 goto out_release_irq;
4091         }
4092
4093         iwl_set_rxon_channel(priv,
4094                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4095         iwl3945_setup_deferred_work(priv);
4096         iwl3945_setup_rx_handlers(priv);
4097
4098         /*********************************
4099          * 8. Setup and Register mac80211
4100          * *******************************/
4101
4102         iwl_enable_interrupts(priv);
4103
4104         err = iwl3945_setup_mac(priv);
4105         if (err)
4106                 goto  out_remove_sysfs;
4107
4108         err = iwl_dbgfs_register(priv, DRV_NAME);
4109         if (err)
4110                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4111
4112         /* Start monitoring the killswitch */
4113         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4114                            2 * HZ);
4115
4116         return 0;
4117
4118  out_remove_sysfs:
4119         destroy_workqueue(priv->workqueue);
4120         priv->workqueue = NULL;
4121         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4122  out_release_irq:
4123         free_irq(priv->pci_dev->irq, priv);
4124  out_disable_msi:
4125         pci_disable_msi(priv->pci_dev);
4126         iwlcore_free_geos(priv);
4127         iwl_free_channel_map(priv);
4128  out_unset_hw_params:
4129         iwl3945_unset_hw_params(priv);
4130  out_eeprom_free:
4131         iwl_eeprom_free(priv);
4132  out_iounmap:
4133         pci_iounmap(pdev, priv->hw_base);
4134  out_pci_release_regions:
4135         pci_release_regions(pdev);
4136  out_pci_disable_device:
4137         pci_set_drvdata(pdev, NULL);
4138         pci_disable_device(pdev);
4139  out_ieee80211_free_hw:
4140         ieee80211_free_hw(priv->hw);
4141  out:
4142         return err;
4143 }
4144
4145 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4146 {
4147         struct iwl_priv *priv = pci_get_drvdata(pdev);
4148         unsigned long flags;
4149
4150         if (!priv)
4151                 return;
4152
4153         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4154
4155         iwl_dbgfs_unregister(priv);
4156
4157         set_bit(STATUS_EXIT_PENDING, &priv->status);
4158
4159         if (priv->mac80211_registered) {
4160                 ieee80211_unregister_hw(priv->hw);
4161                 priv->mac80211_registered = 0;
4162         } else {
4163                 iwl3945_down(priv);
4164         }
4165
4166         /* make sure we flush any pending irq or
4167          * tasklet for the driver
4168          */
4169         spin_lock_irqsave(&priv->lock, flags);
4170         iwl_disable_interrupts(priv);
4171         spin_unlock_irqrestore(&priv->lock, flags);
4172
4173         iwl_synchronize_irq(priv);
4174
4175         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4176
4177         cancel_delayed_work_sync(&priv->rfkill_poll);
4178
4179         iwl3945_dealloc_ucode_pci(priv);
4180
4181         if (priv->rxq.bd)
4182                 iwl3945_rx_queue_free(priv, &priv->rxq);
4183         iwl3945_hw_txq_ctx_free(priv);
4184
4185         iwl3945_unset_hw_params(priv);
4186         iwl_clear_stations_table(priv);
4187
4188         /*netif_stop_queue(dev); */
4189         flush_workqueue(priv->workqueue);
4190
4191         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4192          * priv->workqueue... so we can't take down the workqueue
4193          * until now... */
4194         destroy_workqueue(priv->workqueue);
4195         priv->workqueue = NULL;
4196
4197         free_irq(pdev->irq, priv);
4198         pci_disable_msi(pdev);
4199
4200         pci_iounmap(pdev, priv->hw_base);
4201         pci_release_regions(pdev);
4202         pci_disable_device(pdev);
4203         pci_set_drvdata(pdev, NULL);
4204
4205         iwl_free_channel_map(priv);
4206         iwlcore_free_geos(priv);
4207         kfree(priv->scan);
4208         if (priv->ibss_beacon)
4209                 dev_kfree_skb(priv->ibss_beacon);
4210
4211         ieee80211_free_hw(priv->hw);
4212 }
4213
4214
4215 /*****************************************************************************
4216  *
4217  * driver and module entry point
4218  *
4219  *****************************************************************************/
4220
4221 static struct pci_driver iwl3945_driver = {
4222         .name = DRV_NAME,
4223         .id_table = iwl3945_hw_card_ids,
4224         .probe = iwl3945_pci_probe,
4225         .remove = __devexit_p(iwl3945_pci_remove),
4226 #ifdef CONFIG_PM
4227         .suspend = iwl_pci_suspend,
4228         .resume = iwl_pci_resume,
4229 #endif
4230 };
4231
4232 static int __init iwl3945_init(void)
4233 {
4234
4235         int ret;
4236         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4237         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4238
4239         ret = iwl3945_rate_control_register();
4240         if (ret) {
4241                 printk(KERN_ERR DRV_NAME
4242                        "Unable to register rate control algorithm: %d\n", ret);
4243                 return ret;
4244         }
4245
4246         ret = pci_register_driver(&iwl3945_driver);
4247         if (ret) {
4248                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4249                 goto error_register;
4250         }
4251
4252         return ret;
4253
4254 error_register:
4255         iwl3945_rate_control_unregister();
4256         return ret;
4257 }
4258
4259 static void __exit iwl3945_exit(void)
4260 {
4261         pci_unregister_driver(&iwl3945_driver);
4262         iwl3945_rate_control_unregister();
4263 }
4264
4265 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4266
4267 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4268 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4269 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4270 MODULE_PARM_DESC(swcrypto,
4271                  "using software crypto (default 1 [software])\n");
4272 #ifdef CONFIG_IWLWIFI_DEBUG
4273 module_param_named(debug, iwl_debug_level, uint, 0644);
4274 MODULE_PARM_DESC(debug, "debug output mask");
4275 #endif
4276 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4277 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4278 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4279 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4280
4281 module_exit(iwl3945_exit);
4282 module_init(iwl3945_init);