drivers/net/wireless/ti/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 300                         wl1251_event_handle(wl, 0);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 305                         wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338         /*
 339          * Join command applies filters, and if we are not associated,
 340          * BSSID filter must be disabled for association to work.
 341          */
 342         if (is_zero_ether_addr(wl->bssid))
 343                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 344
 345         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 346                               dtim_period);
 347         if (ret < 0)
 348                 goto out;
 349
 350         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 351         if (ret < 0)
 352                 wl1251_warning("join timeout");
 353
 354 out:
 355         return ret;
 356 }
 357
 358 static void wl1251_op_tx(struct ieee80211_hw *hw,
 359                          struct ieee80211_tx_control *control,
 360                          struct sk_buff *skb)
 361 {
 362         struct wl1251 *wl = hw->priv;
 363         unsigned long flags;
 364
 365         skb_queue_tail(&wl->tx_queue, skb);
 366
 367         /*
 368          * The chip specific setup must run before the first TX packet -
 369          * before that, the tx_work will not be initialized!
 370          */
 371
 372         ieee80211_queue_work(wl->hw, &wl->tx_work);
 373
 374         /*
 375          * The workqueue is slow to process the tx_queue and we need stop
 376          * the queue here, otherwise the queue will get too long.
 377          */
 378         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 379                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 380
 381                 spin_lock_irqsave(&wl->wl_lock, flags);
 382                 ieee80211_stop_queues(wl->hw);
 383                 wl->tx_queue_stopped = true;
 384                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 385         }
 386 }
 387
 388 static int wl1251_op_start(struct ieee80211_hw *hw)
 389 {
 390         struct wl1251 *wl = hw->priv;
 391         struct wiphy *wiphy = hw->wiphy;
 392         int ret = 0;
 393
 394         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 395
 396         mutex_lock(&wl->mutex);
 397
 398         if (wl->state != WL1251_STATE_OFF) {
 399                 wl1251_error("cannot start because not in off state: %d",
 400                              wl->state);
 401                 ret = -EBUSY;
 402                 goto out;
 403         }
 404
 405         ret = wl1251_chip_wakeup(wl);
 406         if (ret < 0)
 407                 goto out;
 408
 409         ret = wl1251_boot(wl);
 410         if (ret < 0)
 411                 goto out;
 412
 413         ret = wl1251_hw_init(wl);
 414         if (ret < 0)
 415                 goto out;
 416
 417         ret = wl1251_acx_station_id(wl);
 418         if (ret < 0)
 419                 goto out;
 420
 421         wl->state = WL1251_STATE_ON;
 422
 423         wl1251_info("firmware booted (%s)", wl->fw_ver);
 424
 425         /* update hw/fw version info in wiphy struct */
 426         wiphy->hw_version = wl->chip_id;
 427         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 428
 429 out:
 430         if (ret < 0)
 431                 wl1251_power_off(wl);
 432
 433         mutex_unlock(&wl->mutex);
 434
 435         return ret;
 436 }
 437
 438 static void wl1251_op_stop(struct ieee80211_hw *hw)
 439 {
 440         struct wl1251 *wl = hw->priv;
 441
 442         wl1251_info("down");
 443
 444         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 445
 446         mutex_lock(&wl->mutex);
 447
 448         WARN_ON(wl->state != WL1251_STATE_ON);
 449
 450         if (wl->scanning) {
 451                 ieee80211_scan_completed(wl->hw, true);
 452                 wl->scanning = false;
 453         }
 454
 455         wl->state = WL1251_STATE_OFF;
 456
 457         wl1251_disable_interrupts(wl);
 458
 459         mutex_unlock(&wl->mutex);
 460
 461         cancel_work_sync(&wl->irq_work);
 462         cancel_work_sync(&wl->tx_work);
 463         cancel_delayed_work_sync(&wl->elp_work);
 464
 465         mutex_lock(&wl->mutex);
 466
 467         /* let's notify MAC80211 about the remaining pending TX frames */
 468         wl1251_tx_flush(wl);
 469         wl1251_power_off(wl);
 470
 471         memset(wl->bssid, 0, ETH_ALEN);
 472         wl->listen_int = 1;
 473         wl->bss_type = MAX_BSS_TYPE;
 474
 475         wl->data_in_count = 0;
 476         wl->rx_counter = 0;
 477         wl->rx_handled = 0;
 478         wl->rx_current_buffer = 0;
 479         wl->rx_last_id = 0;
 480         wl->next_tx_complete = 0;
 481         wl->elp = false;
 482         wl->station_mode = STATION_ACTIVE_MODE;
 483         wl->psm_entry_retry = 0;
 484         wl->tx_queue_stopped = false;
 485         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 486         wl->rssi_thold = 0;
 487         wl->channel = WL1251_DEFAULT_CHANNEL;
 488         wl->monitor_present = false;
 489
 490         wl1251_debugfs_reset(wl);
 491
 492         mutex_unlock(&wl->mutex);
 493 }
 494
 495 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 496                                    struct ieee80211_vif *vif)
 497 {
 498         struct wl1251 *wl = hw->priv;
 499         int ret = 0;
 500
 501         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 502                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 503
 504         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 505                      vif->type, vif->addr);
 506
 507         mutex_lock(&wl->mutex);
 508         if (wl->vif) {
 509                 ret = -EBUSY;
 510                 goto out;
 511         }
 512
 513         wl->vif = vif;
 514
 515         switch (vif->type) {
 516         case NL80211_IFTYPE_STATION:
 517                 wl->bss_type = BSS_TYPE_STA_BSS;
 518                 break;
 519         case NL80211_IFTYPE_ADHOC:
 520                 wl->bss_type = BSS_TYPE_IBSS;
 521                 break;
 522         default:
 523                 ret = -EOPNOTSUPP;
 524                 goto out;
 525         }
 526
 527         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 528                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 529                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 530                 ret = wl1251_acx_station_id(wl);
 531                 if (ret < 0)
 532                         goto out;
 533         }
 534
 535 out:
 536         mutex_unlock(&wl->mutex);
 537         return ret;
 538 }
 539
 540 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 541                                          struct ieee80211_vif *vif)
 542 {
 543         struct wl1251 *wl = hw->priv;
 544
 545         mutex_lock(&wl->mutex);
 546         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 547         wl->vif = NULL;
 548         mutex_unlock(&wl->mutex);
 549 }
 550
 551 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 552 {
 553         struct ieee80211_qos_hdr template;
 554
 555         memset(&template, 0, sizeof(template));
 556
 557         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 558         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 559         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 560
 561         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 562                                              IEEE80211_STYPE_QOS_NULLFUNC |
 563                                              IEEE80211_FCTL_TODS);
 564
 565         /* FIXME: not sure what priority to use here */
 566         template.qos_ctrl = cpu_to_le16(0);
 567
 568         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 569                                        sizeof(template));
 570 }
 571
 572 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 573 {
 574         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 575 }
 576
 577 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 578 {
 579         struct wl1251 *wl = hw->priv;
 580         struct ieee80211_conf *conf = &hw->conf;
 581         int channel, ret = 0;
 582
 583         channel = ieee80211_frequency_to_channel(
 584                         conf->chandef.chan->center_freq);
 585
 586         wl1251_debug(DEBUG_MAC80211,
 587                      "mac80211 config ch %d monitor %s psm %s power %d",
 588                      channel,
 589                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 590                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 591                      conf->power_level);
 592
 593         mutex_lock(&wl->mutex);
 594
 595         ret = wl1251_ps_elp_wakeup(wl);
 596         if (ret < 0)
 597                 goto out;
 598
 599         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 600                 u32 mode;
 601
 602                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 603                         wl->monitor_present = true;
 604                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 605                 } else {
 606                         wl->monitor_present = false;
 607                         mode = 0;
 608                 }
 609
 610                 ret = wl1251_acx_feature_cfg(wl, mode);
 611                 if (ret < 0)
 612                         goto out_sleep;
 613         }
 614
 615         if (channel != wl->channel) {
 616                 wl->channel = channel;
 617
 618                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 619                                   wl->beacon_int, wl->dtim_period);
 620                 if (ret < 0)
 621                         goto out_sleep;
 622         }
 623
 624         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 625                 wl1251_debug(DEBUG_PSM, "psm enabled");
 626
 627                 wl->psm_requested = true;
 628
 629                 wl->dtim_period = conf->ps_dtim_period;
 630
 631                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 632                                                   wl->dtim_period);
 633
 634                 /*
 635                  * mac80211 enables PSM only if we're already associated.
 636                  */
 637                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 638                 if (ret < 0)
 639                         goto out_sleep;
 640         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 641                 wl1251_debug(DEBUG_PSM, "psm disabled");
 642
 643                 wl->psm_requested = false;
 644
 645                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 646                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 647                         if (ret < 0)
 648                                 goto out_sleep;
 649                 }
 650         }
 651
 652         if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 653                 if (conf->flags & IEEE80211_CONF_IDLE) {
 654                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 655                         if (ret < 0)
 656                                 goto out_sleep;
 657                 } else {
 658                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 659                         if (ret < 0)
 660                                 goto out_sleep;
 661                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 662                                           wl->beacon_int, wl->dtim_period);
 663                         if (ret < 0)
 664                                 goto out_sleep;
 665                 }
 666         }
 667
 668         if (conf->power_level != wl->power_level) {
 669                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 670                 if (ret < 0)
 671                         goto out_sleep;
 672
 673                 wl->power_level = conf->power_level;
 674         }
 675
 676 out_sleep:
 677         wl1251_ps_elp_sleep(wl);
 678
 679 out:
 680         mutex_unlock(&wl->mutex);
 681
 682         return ret;
 683 }
 684
 685 struct wl1251_filter_params {
 686         bool enabled;
 687         int mc_list_length;
 688         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 689 };
 690
 691 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 692                                        struct netdev_hw_addr_list *mc_list)
 693 {
 694         struct wl1251_filter_params *fp;
 695         struct netdev_hw_addr *ha;
 696         struct wl1251 *wl = hw->priv;
 697
 698         if (unlikely(wl->state == WL1251_STATE_OFF))
 699                 return 0;
 700
 701         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 702         if (!fp) {
 703                 wl1251_error("Out of memory setting filters.");
 704                 return 0;
 705         }
 706
 707         /* update multicast filtering parameters */
 708         fp->mc_list_length = 0;
 709         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 710                 fp->enabled = false;
 711         } else {
 712                 fp->enabled = true;
 713                 netdev_hw_addr_list_for_each(ha, mc_list) {
 714                         memcpy(fp->mc_list[fp->mc_list_length],
 715                                         ha->addr, ETH_ALEN);
 716                         fp->mc_list_length++;
 717                 }
 718         }
 719
 720         return (u64)(unsigned long)fp;
 721 }
 722
 723 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 724                                   FIF_ALLMULTI | \
 725                                   FIF_FCSFAIL | \
 726                                   FIF_BCN_PRBRESP_PROMISC | \
 727                                   FIF_CONTROL | \
 728                                   FIF_OTHER_BSS | \
 729                                   FIF_PROBE_REQ)
 730
 731 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 732                                        unsigned int changed,
 733                                        unsigned int *total, u64 multicast)
 734 {
 735         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 736         struct wl1251 *wl = hw->priv;
 737         int ret;
 738
 739         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 740
 741         *total &= WL1251_SUPPORTED_FILTERS;
 742         changed &= WL1251_SUPPORTED_FILTERS;
 743
 744         if (changed == 0) {
 745                 /* no filters which we support changed */
 746                 kfree(fp);
 747                 return;
 748         }
 749
 750         mutex_lock(&wl->mutex);
 751
 752         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 753         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 754
 755         if (*total & FIF_PROMISC_IN_BSS) {
 756                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 757                 wl->rx_config |= CFG_RX_ALL_GOOD;
 758         }
 759         if (*total & FIF_ALLMULTI)
 760                 /*
 761                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 762                  * all multicast frames
 763                  */
 764                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 765         if (*total & FIF_FCSFAIL)
 766                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 767         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 768                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 769                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 770         }
 771         if (*total & FIF_CONTROL)
 772                 wl->rx_filter |= CFG_RX_CTL_EN;
 773         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 774                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 775         if (*total & FIF_PROBE_REQ)
 776                 wl->rx_filter |= CFG_RX_PREQ_EN;
 777
 778         if (wl->state == WL1251_STATE_OFF)
 779                 goto out;
 780
 781         ret = wl1251_ps_elp_wakeup(wl);
 782         if (ret < 0)
 783                 goto out;
 784
 785         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 786                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 787         else if (fp)
 788                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 789                                                    fp->mc_list,
 790                                                    fp->mc_list_length);
 791         if (ret < 0)
 792                 goto out;
 793
 794         /* send filters to firmware */
 795         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 796
 797         wl1251_ps_elp_sleep(wl);
 798
 799 out:
 800         mutex_unlock(&wl->mutex);
 801         kfree(fp);
 802 }
 803
 804 /* HW encryption */
 805 static int wl1251_set_key_type(struct wl1251 *wl,
 806                                struct wl1251_cmd_set_keys *key,
 807                                enum set_key_cmd cmd,
 808                                struct ieee80211_key_conf *mac80211_key,
 809                                const u8 *addr)
 810 {
 811         switch (mac80211_key->cipher) {
 812         case WLAN_CIPHER_SUITE_WEP40:
 813         case WLAN_CIPHER_SUITE_WEP104:
 814                 if (is_broadcast_ether_addr(addr))
 815                         key->key_type = KEY_WEP_DEFAULT;
 816                 else
 817                         key->key_type = KEY_WEP_ADDR;
 818
 819                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 820                 break;
 821         case WLAN_CIPHER_SUITE_TKIP:
 822                 if (is_broadcast_ether_addr(addr))
 823                         key->key_type = KEY_TKIP_MIC_GROUP;
 824                 else
 825                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 826
 827                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 828                 break;
 829         case WLAN_CIPHER_SUITE_CCMP:
 830                 if (is_broadcast_ether_addr(addr))
 831                         key->key_type = KEY_AES_GROUP;
 832                 else
 833                         key->key_type = KEY_AES_PAIRWISE;
 834                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 835                 break;
 836         default:
 837                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 838                 return -EOPNOTSUPP;
 839         }
 840
 841         return 0;
 842 }
 843
 844 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 845                              struct ieee80211_vif *vif,
 846                              struct ieee80211_sta *sta,
 847                              struct ieee80211_key_conf *key)
 848 {
 849         struct wl1251 *wl = hw->priv;
 850         struct wl1251_cmd_set_keys *wl_cmd;
 851         const u8 *addr;
 852         int ret;
 853
 854         static const u8 bcast_addr[ETH_ALEN] =
 855                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 856
 857         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 858
 859         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 860         if (!wl_cmd) {
 861                 ret = -ENOMEM;
 862                 goto out;
 863         }
 864
 865         addr = sta ? sta->addr : bcast_addr;
 866
 867         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 868         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 869         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 870                      key->cipher, key->keyidx, key->keylen, key->flags);
 871         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 872
 873         if (is_zero_ether_addr(addr)) {
 874                 /* We dont support TX only encryption */
 875                 ret = -EOPNOTSUPP;
 876                 goto out;
 877         }
 878
 879         mutex_lock(&wl->mutex);
 880
 881         switch (cmd) {
 882         case SET_KEY:
 883                 if (wl->monitor_present) {
 884                         ret = -EOPNOTSUPP;
 885                         goto out_unlock;
 886                 }
 887                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 888                 break;
 889         case DISABLE_KEY:
 890                 wl_cmd->key_action = KEY_REMOVE;
 891                 break;
 892         default:
 893                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 894                 break;
 895         }
 896
 897         ret = wl1251_ps_elp_wakeup(wl);
 898         if (ret < 0)
 899                 goto out_unlock;
 900
 901         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 902         if (ret < 0) {
 903                 wl1251_error("Set KEY type failed");
 904                 goto out_sleep;
 905         }
 906
 907         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 908                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 909
 910         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 911             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 912                 /*
 913                  * We get the key in the following form:
 914                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 915                  * but the target is expecting:
 916                  * TKIP - RX MIC - TX MIC
 917                  */
 918                 memcpy(wl_cmd->key, key->key, 16);
 919                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 920                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 921
 922         } else {
 923                 memcpy(wl_cmd->key, key->key, key->keylen);
 924         }
 925         wl_cmd->key_size = key->keylen;
 926
 927         wl_cmd->id = key->keyidx;
 928         wl_cmd->ssid_profile = 0;
 929
 930         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 931
 932         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 933         if (ret < 0) {
 934                 wl1251_warning("could not set keys");
 935                 goto out_sleep;
 936         }
 937
 938 out_sleep:
 939         wl1251_ps_elp_sleep(wl);
 940
 941 out_unlock:
 942         mutex_unlock(&wl->mutex);
 943
 944 out:
 945         kfree(wl_cmd);
 946
 947         return ret;
 948 }
 949
 950 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 951                              struct ieee80211_vif *vif,
 952                              struct cfg80211_scan_request *req)
 953 {
 954         struct wl1251 *wl = hw->priv;
 955         struct sk_buff *skb;
 956         size_t ssid_len = 0;
 957         u8 *ssid = NULL;
 958         int ret;
 959
 960         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 961
 962         if (req->n_ssids) {
 963                 ssid = req->ssids[0].ssid;
 964                 ssid_len = req->ssids[0].ssid_len;
 965         }
 966
 967         mutex_lock(&wl->mutex);
 968
 969         if (wl->scanning) {
 970                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 971                 ret = -EINVAL;
 972                 goto out;
 973         }
 974
 975         ret = wl1251_ps_elp_wakeup(wl);
 976         if (ret < 0)
 977                 goto out;
 978
 979         if (hw->conf.flags & IEEE80211_CONF_IDLE) {
 980                 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 981                 if (ret < 0)
 982                         goto out_sleep;
 983                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 984                                   wl->beacon_int, wl->dtim_period);
 985                 if (ret < 0)
 986                         goto out_sleep;
 987         }
 988
 989         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 990                                      req->ie_len);
 991         if (!skb) {
 992                 ret = -ENOMEM;
 993                 goto out_idle;
 994         }
 995         if (req->ie_len)
 996                 memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len);
 997
 998         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 999                                       skb->len);
1000         dev_kfree_skb(skb);
1001         if (ret < 0)
1002                 goto out_idle;
1003
1004         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1005         if (ret < 0)
1006                 goto out_idle;
1007
1008         wl->scanning = true;
1009
1010         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1011                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1012         if (ret < 0) {
1013                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1014                 wl->scanning = false;
1015                 goto out_idle;
1016         }
1017         goto out_sleep;
1018
1019 out_idle:
1020         if (hw->conf.flags & IEEE80211_CONF_IDLE)
1021                 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1022 out_sleep:
1023         wl1251_ps_elp_sleep(wl);
1024
1025 out:
1026         mutex_unlock(&wl->mutex);
1027
1028         return ret;
1029 }
1030
1031 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1032 {
1033         struct wl1251 *wl = hw->priv;
1034         int ret;
1035
1036         mutex_lock(&wl->mutex);
1037
1038         ret = wl1251_ps_elp_wakeup(wl);
1039         if (ret < 0)
1040                 goto out;
1041
1042         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1043         if (ret < 0)
1044                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1045
1046         wl1251_ps_elp_sleep(wl);
1047
1048 out:
1049         mutex_unlock(&wl->mutex);
1050
1051         return ret;
1052 }
1053
1054 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1055                                        struct ieee80211_vif *vif,
1056                                        struct ieee80211_bss_conf *bss_conf,
1057                                        u32 changed)
1058 {
1059         struct wl1251 *wl = hw->priv;
1060         struct sk_buff *beacon, *skb;
1061         bool enable;
1062         int ret;
1063
1064         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1065
1066         mutex_lock(&wl->mutex);
1067
1068         ret = wl1251_ps_elp_wakeup(wl);
1069         if (ret < 0)
1070                 goto out;
1071
1072         if (changed & BSS_CHANGED_CQM) {
1073                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1074                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1075                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1076                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1077                 if (ret < 0)
1078                         goto out;
1079                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1080         }
1081
1082         if (changed & BSS_CHANGED_BSSID) {
1083                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1084
1085                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1086                 if (!skb)
1087                         goto out_sleep;
1088
1089                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1090                                               skb->data, skb->len);
1091                 dev_kfree_skb(skb);
1092                 if (ret < 0)
1093                         goto out_sleep;
1094
1095                 ret = wl1251_build_qos_null_data(wl);
1096                 if (ret < 0)
1097                         goto out;
1098
1099                 if (wl->bss_type != BSS_TYPE_IBSS) {
1100                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1101                                           wl->beacon_int, wl->dtim_period);
1102                         if (ret < 0)
1103                                 goto out_sleep;
1104                 }
1105         }
1106
1107         if (changed & BSS_CHANGED_ASSOC) {
1108                 if (bss_conf->assoc) {
1109                         wl->beacon_int = bss_conf->beacon_int;
1110
1111                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1112                         if (!skb)
1113                                 goto out_sleep;
1114
1115                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1116                                                       skb->data,
1117                                                       skb->len);
1118                         dev_kfree_skb(skb);
1119                         if (ret < 0)
1120                                 goto out_sleep;
1121
1122                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1123                         if (ret < 0)
1124                                 goto out_sleep;
1125                 } else {
1126                         /* use defaults when not associated */
1127                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1128                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1129                 }
1130         }
1131         if (changed & BSS_CHANGED_ERP_SLOT) {
1132                 if (bss_conf->use_short_slot)
1133                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1134                 else
1135                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1136                 if (ret < 0) {
1137                         wl1251_warning("Set slot time failed %d", ret);
1138                         goto out_sleep;
1139                 }
1140         }
1141
1142         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1143                 if (bss_conf->use_short_preamble)
1144                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1145                 else
1146                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1147         }
1148
1149         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1150                 if (bss_conf->use_cts_prot)
1151                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1152                 else
1153                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1154                 if (ret < 0) {
1155                         wl1251_warning("Set ctsprotect failed %d", ret);
1156                         goto out_sleep;
1157                 }
1158         }
1159
1160         if (changed & BSS_CHANGED_ARP_FILTER) {
1161                 __be32 addr = bss_conf->arp_addr_list[0];
1162                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1163
1164                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1165                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1166
1167                 if (ret < 0)
1168                         goto out_sleep;
1169         }
1170
1171         if (changed & BSS_CHANGED_BEACON) {
1172                 beacon = ieee80211_beacon_get(hw, vif);
1173                 if (!beacon)
1174                         goto out_sleep;
1175
1176                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1177                                               beacon->len);
1178
1179                 if (ret < 0) {
1180                         dev_kfree_skb(beacon);
1181                         goto out_sleep;
1182                 }
1183
1184                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1185                                               beacon->len);
1186
1187                 dev_kfree_skb(beacon);
1188
1189                 if (ret < 0)
1190                         goto out_sleep;
1191
1192                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1193                                   wl->channel, wl->dtim_period);
1194
1195                 if (ret < 0)
1196                         goto out_sleep;
1197         }
1198
1199 out_sleep:
1200         wl1251_ps_elp_sleep(wl);
1201
1202 out:
1203         mutex_unlock(&wl->mutex);
1204 }
1205
1206
1207 /* can't be const, mac80211 writes to this */
1208 static struct ieee80211_rate wl1251_rates[] = {
1209         { .bitrate = 10,
1210           .hw_value = 0x1,
1211           .hw_value_short = 0x1, },
1212         { .bitrate = 20,
1213           .hw_value = 0x2,
1214           .hw_value_short = 0x2,
1215           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1216         { .bitrate = 55,
1217           .hw_value = 0x4,
1218           .hw_value_short = 0x4,
1219           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1220         { .bitrate = 110,
1221           .hw_value = 0x20,
1222           .hw_value_short = 0x20,
1223           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1224         { .bitrate = 60,
1225           .hw_value = 0x8,
1226           .hw_value_short = 0x8, },
1227         { .bitrate = 90,
1228           .hw_value = 0x10,
1229           .hw_value_short = 0x10, },
1230         { .bitrate = 120,
1231           .hw_value = 0x40,
1232           .hw_value_short = 0x40, },
1233         { .bitrate = 180,
1234           .hw_value = 0x80,
1235           .hw_value_short = 0x80, },
1236         { .bitrate = 240,
1237           .hw_value = 0x200,
1238           .hw_value_short = 0x200, },
1239         { .bitrate = 360,
1240          .hw_value = 0x400,
1241          .hw_value_short = 0x400, },
1242         { .bitrate = 480,
1243           .hw_value = 0x800,
1244           .hw_value_short = 0x800, },
1245         { .bitrate = 540,
1246           .hw_value = 0x1000,
1247           .hw_value_short = 0x1000, },
1248 };
1249
1250 /* can't be const, mac80211 writes to this */
1251 static struct ieee80211_channel wl1251_channels[] = {
1252         { .hw_value = 1, .center_freq = 2412},
1253         { .hw_value = 2, .center_freq = 2417},
1254         { .hw_value = 3, .center_freq = 2422},
1255         { .hw_value = 4, .center_freq = 2427},
1256         { .hw_value = 5, .center_freq = 2432},
1257         { .hw_value = 6, .center_freq = 2437},
1258         { .hw_value = 7, .center_freq = 2442},
1259         { .hw_value = 8, .center_freq = 2447},
1260         { .hw_value = 9, .center_freq = 2452},
1261         { .hw_value = 10, .center_freq = 2457},
1262         { .hw_value = 11, .center_freq = 2462},
1263         { .hw_value = 12, .center_freq = 2467},
1264         { .hw_value = 13, .center_freq = 2472},
1265 };
1266
1267 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1268                              struct ieee80211_vif *vif, u16 queue,
1269                              const struct ieee80211_tx_queue_params *params)
1270 {
1271         enum wl1251_acx_ps_scheme ps_scheme;
1272         struct wl1251 *wl = hw->priv;
1273         int ret;
1274
1275         mutex_lock(&wl->mutex);
1276
1277         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1278
1279         ret = wl1251_ps_elp_wakeup(wl);
1280         if (ret < 0)
1281                 goto out;
1282
1283         /* mac80211 uses units of 32 usec */
1284         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1285                                 params->cw_min, params->cw_max,
1286                                 params->aifs, params->txop * 32);
1287         if (ret < 0)
1288                 goto out_sleep;
1289
1290         if (params->uapsd)
1291                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1292         else
1293                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1294
1295         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1296                                  CHANNEL_TYPE_EDCF,
1297                                  wl1251_tx_get_queue(queue), ps_scheme,
1298                                  WL1251_ACX_ACK_POLICY_LEGACY);
1299         if (ret < 0)
1300                 goto out_sleep;
1301
1302 out_sleep:
1303         wl1251_ps_elp_sleep(wl);
1304
1305 out:
1306         mutex_unlock(&wl->mutex);
1307
1308         return ret;
1309 }
1310
1311 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1312                                 struct survey_info *survey)
1313 {
1314         struct wl1251 *wl = hw->priv;
1315         struct ieee80211_conf *conf = &hw->conf;
1316
1317         if (idx != 0)
1318                 return -ENOENT;
1319
1320         survey->channel = conf->chandef.chan;
1321         survey->filled = SURVEY_INFO_NOISE_DBM;
1322         survey->noise = wl->noise;
1323
1324         return 0;
1325 }
1326
1327 /* can't be const, mac80211 writes to this */
1328 static struct ieee80211_supported_band wl1251_band_2ghz = {
1329         .channels = wl1251_channels,
1330         .n_channels = ARRAY_SIZE(wl1251_channels),
1331         .bitrates = wl1251_rates,
1332         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1333 };
1334
1335 static const struct ieee80211_ops wl1251_ops = {
1336         .start = wl1251_op_start,
1337         .stop = wl1251_op_stop,
1338         .add_interface = wl1251_op_add_interface,
1339         .remove_interface = wl1251_op_remove_interface,
1340         .config = wl1251_op_config,
1341         .prepare_multicast = wl1251_op_prepare_multicast,
1342         .configure_filter = wl1251_op_configure_filter,
1343         .tx = wl1251_op_tx,
1344         .set_key = wl1251_op_set_key,
1345         .hw_scan = wl1251_op_hw_scan,
1346         .bss_info_changed = wl1251_op_bss_info_changed,
1347         .set_rts_threshold = wl1251_op_set_rts_threshold,
1348         .conf_tx = wl1251_op_conf_tx,
1349         .get_survey = wl1251_op_get_survey,
1350 };
1351
1352 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1353 {
1354         unsigned long timeout;
1355
1356         wl1251_reg_write32(wl, EE_ADDR, offset);
1357         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1358
1359         /* EE_CTL_READ clears when data is ready */
1360         timeout = jiffies + msecs_to_jiffies(100);
1361         while (1) {
1362                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1363                         break;
1364
1365                 if (time_after(jiffies, timeout))
1366                         return -ETIMEDOUT;
1367
1368                 msleep(1);
1369         }
1370
1371         *data = wl1251_reg_read32(wl, EE_DATA);
1372         return 0;
1373 }
1374
1375 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1376                               u8 *data, size_t len)
1377 {
1378         size_t i;
1379         int ret;
1380
1381         wl1251_reg_write32(wl, EE_START, 0);
1382
1383         for (i = 0; i < len; i++) {
1384                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1385                 if (ret < 0)
1386                         return ret;
1387         }
1388
1389         return 0;
1390 }
1391
1392 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1393 {
1394         u8 mac[ETH_ALEN];
1395         int i, ret;
1396
1397         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1398
1399         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1400         if (ret < 0) {
1401                 wl1251_warning("failed to read MAC address from EEPROM");
1402                 return ret;
1403         }
1404
1405         /* MAC is stored in reverse order */
1406         for (i = 0; i < ETH_ALEN; i++)
1407                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1408
1409         return 0;
1410 }
1411
1412 static int wl1251_register_hw(struct wl1251 *wl)
1413 {
1414         int ret;
1415
1416         if (wl->mac80211_registered)
1417                 return 0;
1418
1419         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1420
1421         ret = ieee80211_register_hw(wl->hw);
1422         if (ret < 0) {
1423                 wl1251_error("unable to register mac80211 hw: %d", ret);
1424                 return ret;
1425         }
1426
1427         wl->mac80211_registered = true;
1428
1429         wl1251_notice("loaded");
1430
1431         return 0;
1432 }
1433
1434 int wl1251_init_ieee80211(struct wl1251 *wl)
1435 {
1436         int ret;
1437
1438         /* The tx descriptor buffer and the TKIP space */
1439         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1440                 + WL1251_TKIP_IV_SPACE;
1441
1442         /* unit us */
1443         /* FIXME: find a proper value */
1444         wl->hw->channel_change_time = 10000;
1445
1446         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1447                 IEEE80211_HW_SUPPORTS_PS |
1448                 IEEE80211_HW_SUPPORTS_UAPSD;
1449
1450         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1451                                          BIT(NL80211_IFTYPE_ADHOC);
1452         wl->hw->wiphy->max_scan_ssids = 1;
1453         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1454
1455         wl->hw->queues = 4;
1456
1457         if (wl->use_eeprom)
1458                 wl1251_read_eeprom_mac(wl);
1459
1460         ret = wl1251_register_hw(wl);
1461         if (ret)
1462                 goto out;
1463
1464         wl1251_debugfs_init(wl);
1465         wl1251_notice("initialized");
1466
1467         ret = 0;
1468
1469 out:
1470         return ret;
1471 }
1472 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1473
1474 struct ieee80211_hw *wl1251_alloc_hw(void)
1475 {
1476         struct ieee80211_hw *hw;
1477         struct wl1251 *wl;
1478         int i;
1479         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1480
1481         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1482         if (!hw) {
1483                 wl1251_error("could not alloc ieee80211_hw");
1484                 return ERR_PTR(-ENOMEM);
1485         }
1486
1487         wl = hw->priv;
1488         memset(wl, 0, sizeof(*wl));
1489
1490         wl->hw = hw;
1491
1492         wl->data_in_count = 0;
1493
1494         skb_queue_head_init(&wl->tx_queue);
1495
1496         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1497         wl->channel = WL1251_DEFAULT_CHANNEL;
1498         wl->monitor_present = false;
1499         wl->scanning = false;
1500         wl->default_key = 0;
1501         wl->listen_int = 1;
1502         wl->rx_counter = 0;
1503         wl->rx_handled = 0;
1504         wl->rx_current_buffer = 0;
1505         wl->rx_last_id = 0;
1506         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1507         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1508         wl->elp = false;
1509         wl->station_mode = STATION_ACTIVE_MODE;
1510         wl->psm_requested = false;
1511         wl->psm_entry_retry = 0;
1512         wl->tx_queue_stopped = false;
1513         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1514         wl->rssi_thold = 0;
1515         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1516         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1517         wl->vif = NULL;
1518
1519         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1520                 wl->tx_frames[i] = NULL;
1521
1522         wl->next_tx_complete = 0;
1523
1524         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1525         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1526
1527         /*
1528          * In case our MAC address is not correctly set,
1529          * we use a random but Nokia MAC.
1530          */
1531         memcpy(wl->mac_addr, nokia_oui, 3);
1532         get_random_bytes(wl->mac_addr + 3, 3);
1533
1534         wl->state = WL1251_STATE_OFF;
1535         mutex_init(&wl->mutex);
1536
1537         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1538         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1539
1540         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1541         if (!wl->rx_descriptor) {
1542                 wl1251_error("could not allocate memory for rx descriptor");
1543                 ieee80211_free_hw(hw);
1544                 return ERR_PTR(-ENOMEM);
1545         }
1546
1547         return hw;
1548 }
1549 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1550
1551 int wl1251_free_hw(struct wl1251 *wl)
1552 {
1553         ieee80211_unregister_hw(wl->hw);
1554
1555         wl1251_debugfs_exit(wl);
1556
1557         kfree(wl->target_mem_map);
1558         kfree(wl->data_path);
1559         vfree(wl->fw);
1560         wl->fw = NULL;
1561         kfree(wl->nvs);
1562         wl->nvs = NULL;
1563
1564         kfree(wl->rx_descriptor);
1565         wl->rx_descriptor = NULL;
1566
1567         ieee80211_free_hw(wl->hw);
1568
1569         return 0;
1570 }
1571 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1572
1573 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1574 MODULE_LICENSE("GPL");
1575 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1576 MODULE_FIRMWARE(WL1251_FW_NAME);