drivers/net/wireless/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
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "reg.h"
  35 #include "io.h"
  36 #include "cmd.h"
  37 #include "event.h"
  38 #include "tx.h"
  39 #include "rx.h"
  40 #include "ps.h"
  41 #include "init.h"
  42 #include "debugfs.h"
  43 #include "boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static int wl1251_power_off(struct wl1251 *wl)
  56 {
  57         return wl->if_ops->power(wl, false);
  58 }
  59
  60 static int wl1251_power_on(struct wl1251 *wl)
  61 {
  62         return wl->if_ops->power(wl, true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = vmalloc(wl->fw_len);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         ret = 0;
 134
 135 out:
 136         release_firmware(fw);
 137
 138         return ret;
 139 }
 140
 141 static void wl1251_fw_wakeup(struct wl1251 *wl)
 142 {
 143         u32 elp_reg;
 144
 145         elp_reg = ELPCTRL_WAKE_UP;
 146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 148
 149         if (!(elp_reg & ELPCTRL_WLAN_READY))
 150                 wl1251_warning("WLAN not ready");
 151 }
 152
 153 static int wl1251_chip_wakeup(struct wl1251 *wl)
 154 {
 155         int ret;
 156
 157         ret = wl1251_power_on(wl);
 158         if (ret < 0)
 159                 return ret;
 160
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         if (wl->nvs == NULL && !wl->use_eeprom) {
 205                 /* No NVS from netlink, try to get it from the filesystem */
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 10
 216 static void wl1251_irq_work(struct work_struct *work)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl =
 220                 container_of(work, struct wl1251, irq_work);
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 if (--ctr == 0)
 312                         break;
 313
 314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 315         } while (intr);
 316
 317 out_sleep:
 318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 319         wl1251_ps_elp_sleep(wl);
 320
 321 out:
 322         mutex_unlock(&wl->mutex);
 323 }
 324
 325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 326                        u16 beacon_interval, u8 dtim_period)
 327 {
 328         int ret;
 329
 330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 332                                      wl->tx_mgmt_frm_rate,
 333                                      wl->tx_mgmt_frm_mod);
 334         if (ret < 0)
 335                 goto out;
 336
 337         /*
 338          * Join command applies filters, and if we are not associated,
 339          * BSSID filter must be disabled for association to work.
 340          */
 341         if (is_zero_ether_addr(wl->bssid))
 342                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 343
 344         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 345                               dtim_period);
 346         if (ret < 0)
 347                 goto out;
 348
 349         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 350         if (ret < 0)
 351                 wl1251_warning("join timeout");
 352
 353 out:
 354         return ret;
 355 }
 356
 357 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 358 {
 359         struct wl1251 *wl = hw->priv;
 360         unsigned long flags;
 361
 362         skb_queue_tail(&wl->tx_queue, skb);
 363
 364         /*
 365          * The chip specific setup must run before the first TX packet -
 366          * before that, the tx_work will not be initialized!
 367          */
 368
 369         ieee80211_queue_work(wl->hw, &wl->tx_work);
 370
 371         /*
 372          * The workqueue is slow to process the tx_queue and we need stop
 373          * the queue here, otherwise the queue will get too long.
 374          */
 375         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 376                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 377
 378                 spin_lock_irqsave(&wl->wl_lock, flags);
 379                 ieee80211_stop_queues(wl->hw);
 380                 wl->tx_queue_stopped = true;
 381                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 382         }
 383 }
 384
 385 static int wl1251_op_start(struct ieee80211_hw *hw)
 386 {
 387         struct wl1251 *wl = hw->priv;
 388         struct wiphy *wiphy = hw->wiphy;
 389         int ret = 0;
 390
 391         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 392
 393         mutex_lock(&wl->mutex);
 394
 395         if (wl->state != WL1251_STATE_OFF) {
 396                 wl1251_error("cannot start because not in off state: %d",
 397                              wl->state);
 398                 ret = -EBUSY;
 399                 goto out;
 400         }
 401
 402         ret = wl1251_chip_wakeup(wl);
 403         if (ret < 0)
 404                 goto out;
 405
 406         ret = wl1251_boot(wl);
 407         if (ret < 0)
 408                 goto out;
 409
 410         ret = wl1251_hw_init(wl);
 411         if (ret < 0)
 412                 goto out;
 413
 414         ret = wl1251_acx_station_id(wl);
 415         if (ret < 0)
 416                 goto out;
 417
 418         wl->state = WL1251_STATE_ON;
 419
 420         wl1251_info("firmware booted (%s)", wl->fw_ver);
 421
 422         /* update hw/fw version info in wiphy struct */
 423         wiphy->hw_version = wl->chip_id;
 424         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 425
 426 out:
 427         if (ret < 0)
 428                 wl1251_power_off(wl);
 429
 430         mutex_unlock(&wl->mutex);
 431
 432         return ret;
 433 }
 434
 435 static void wl1251_op_stop(struct ieee80211_hw *hw)
 436 {
 437         struct wl1251 *wl = hw->priv;
 438
 439         wl1251_info("down");
 440
 441         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 442
 443         mutex_lock(&wl->mutex);
 444
 445         WARN_ON(wl->state != WL1251_STATE_ON);
 446
 447         if (wl->scanning) {
 448                 ieee80211_scan_completed(wl->hw, true);
 449                 wl->scanning = false;
 450         }
 451
 452         wl->state = WL1251_STATE_OFF;
 453
 454         wl1251_disable_interrupts(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         cancel_work_sync(&wl->irq_work);
 459         cancel_work_sync(&wl->tx_work);
 460         cancel_delayed_work_sync(&wl->ps_work);
 461         cancel_delayed_work_sync(&wl->elp_work);
 462
 463         mutex_lock(&wl->mutex);
 464
 465         /* let's notify MAC80211 about the remaining pending TX frames */
 466         wl1251_tx_flush(wl);
 467         wl1251_power_off(wl);
 468
 469         memset(wl->bssid, 0, ETH_ALEN);
 470         wl->listen_int = 1;
 471         wl->bss_type = MAX_BSS_TYPE;
 472
 473         wl->data_in_count = 0;
 474         wl->rx_counter = 0;
 475         wl->rx_handled = 0;
 476         wl->rx_current_buffer = 0;
 477         wl->rx_last_id = 0;
 478         wl->next_tx_complete = 0;
 479         wl->elp = false;
 480         wl->station_mode = STATION_ACTIVE_MODE;
 481         wl->tx_queue_stopped = false;
 482         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 483         wl->rssi_thold = 0;
 484         wl->channel = WL1251_DEFAULT_CHANNEL;
 485
 486         wl1251_debugfs_reset(wl);
 487
 488         mutex_unlock(&wl->mutex);
 489 }
 490
 491 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 492                                    struct ieee80211_vif *vif)
 493 {
 494         struct wl1251 *wl = hw->priv;
 495         int ret = 0;
 496
 497         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 498                      vif->type, vif->addr);
 499
 500         mutex_lock(&wl->mutex);
 501         if (wl->vif) {
 502                 ret = -EBUSY;
 503                 goto out;
 504         }
 505
 506         wl->vif = vif;
 507
 508         switch (vif->type) {
 509         case NL80211_IFTYPE_STATION:
 510                 wl->bss_type = BSS_TYPE_STA_BSS;
 511                 break;
 512         case NL80211_IFTYPE_ADHOC:
 513                 wl->bss_type = BSS_TYPE_IBSS;
 514                 break;
 515         default:
 516                 ret = -EOPNOTSUPP;
 517                 goto out;
 518         }
 519
 520         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 521                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 522                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 523                 ret = wl1251_acx_station_id(wl);
 524                 if (ret < 0)
 525                         goto out;
 526         }
 527
 528 out:
 529         mutex_unlock(&wl->mutex);
 530         return ret;
 531 }
 532
 533 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 534                                          struct ieee80211_vif *vif)
 535 {
 536         struct wl1251 *wl = hw->priv;
 537
 538         mutex_lock(&wl->mutex);
 539         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 540         wl->vif = NULL;
 541         mutex_unlock(&wl->mutex);
 542 }
 543
 544 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 545 {
 546         struct ieee80211_qos_hdr template;
 547
 548         memset(&template, 0, sizeof(template));
 549
 550         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 551         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 552         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 553
 554         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 555                                              IEEE80211_STYPE_QOS_NULLFUNC |
 556                                              IEEE80211_FCTL_TODS);
 557
 558         /* FIXME: not sure what priority to use here */
 559         template.qos_ctrl = cpu_to_le16(0);
 560
 561         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 562                                        sizeof(template));
 563 }
 564
 565 static void wl1251_ps_work(struct work_struct *work)
 566 {
 567         struct delayed_work *dwork;
 568         struct wl1251 *wl;
 569         unsigned long diff, wait;
 570         bool need_ps;
 571         bool have_ps;
 572         int ret;
 573         int i;
 574
 575         dwork = container_of(work, struct delayed_work, work);
 576         wl = container_of(dwork, struct wl1251, ps_work);
 577
 578         mutex_lock(&wl->mutex);
 579
 580         /* don't change PS modes while still transitioning, to avoid possbile
 581          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 582         if (wl->ps_transitioning) {
 583                 diff = jiffies - wl->ps_change_jiffies;
 584                 if (diff > msecs_to_jiffies(500)) {
 585                         wl1251_error("PS change taking too long: %lu", diff);
 586                         wl->ps_transitioning = false;
 587                 } else {
 588                         //wl1251_error("PS still transitioning");
 589                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 590                                 msecs_to_jiffies(50));
 591                         goto out;
 592                 }
 593         }
 594
 595         need_ps = wl->psm_requested && !wl->bss_lost;
 596         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 597
 598         if (need_ps == have_ps) {
 599                 //wl1251_info("ps: already in mode %d", have_ps);
 600                 goto out;
 601         }
 602
 603         /* don't enter PS if there was recent activity */
 604         if (need_ps) {
 605                 wait = 0;
 606
 607                 diff = jiffies - wl->last_io_jiffies;
 608                 if (diff < msecs_to_jiffies(150)) {
 609                         //wl1251_info("ps: postponed psm, j %ld", diff);
 610                         wait = msecs_to_jiffies(150) - diff + 1;
 611                 }
 612
 613                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 614                         if (wl->tx_frames[i] != NULL) {
 615                                 //wl1251_error("  frm %d busy", i);
 616                                 if (wait < msecs_to_jiffies(50))
 617                                         wait = msecs_to_jiffies(50);
 618                                 break;
 619                         }
 620                 }
 621
 622                 if (wait > 0) {
 623                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 624                         goto out;
 625                 }
 626         }
 627
 628         ret = wl1251_ps_elp_wakeup(wl);
 629         if (ret < 0)
 630                 goto out;
 631
 632         if (need_ps) {
 633                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 634                                             wl->dtim_period);
 635         }
 636         ret = wl1251_ps_set_mode(wl,
 637                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 638         if (ret < 0)
 639                 goto out_sleep;
 640
 641         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 642         //      jiffies - wl->last_io_jiffies);
 643
 644 out_sleep:
 645         wl1251_ps_elp_sleep(wl);
 646
 647 out:
 648         mutex_unlock(&wl->mutex);
 649 }
 650
 651 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 652 {
 653         struct wl1251 *wl = hw->priv;
 654         struct ieee80211_conf *conf = &hw->conf;
 655         int channel, ret = 0;
 656
 657         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 658
 659         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 660                      channel,
 661                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 662                      conf->power_level);
 663
 664         mutex_lock(&wl->mutex);
 665
 666         ret = wl1251_ps_elp_wakeup(wl);
 667         if (ret < 0)
 668                 goto out;
 669
 670         if (channel != wl->channel) {
 671                 wl->channel = channel;
 672
 673                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 674                                   wl->beacon_int, wl->dtim_period);
 675                 if (ret < 0)
 676                         goto out_sleep;
 677         }
 678
 679         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 680                 wl1251_debug(DEBUG_PSM, "psm enabled");
 681
 682                 wl->psm_requested = true;
 683
 684                 wl->dtim_period = conf->ps_dtim_period;
 685
 686                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 687         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 688                    wl->psm_requested) {
 689                 wl1251_debug(DEBUG_PSM, "psm disabled");
 690
 691                 wl->psm_requested = false;
 692
 693                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 694         }
 695
 696         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 697                 if (conf->flags & IEEE80211_CONF_IDLE) {
 698                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 699                         if (ret < 0)
 700                                 goto out_sleep;
 701                 } else {
 702                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 703                         if (ret < 0)
 704                                 goto out_sleep;
 705
 706                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 707                         if (ret < 0)
 708                                 wl1251_error("error waiting for wakeup");
 709
 710                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 711                                           wl->beacon_int, wl->dtim_period);
 712                         if (ret < 0)
 713                                 goto out_sleep;
 714                 }
 715         }
 716
 717         if (conf->power_level != wl->power_level) {
 718                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 719                 if (ret < 0)
 720                         goto out_sleep;
 721
 722                 wl->power_level = conf->power_level;
 723         }
 724
 725 out_sleep:
 726         wl1251_ps_elp_sleep(wl);
 727
 728 out:
 729         mutex_unlock(&wl->mutex);
 730
 731         return ret;
 732 }
 733
 734 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 735                                   FIF_ALLMULTI | \
 736                                   FIF_FCSFAIL | \
 737                                   FIF_BCN_PRBRESP_PROMISC | \
 738                                   FIF_CONTROL | \
 739                                   FIF_OTHER_BSS | \
 740                                   FIF_PROBE_REQ)
 741
 742 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 743                                        unsigned int changed,
 744                                        unsigned int *total,u64 multicast)
 745 {
 746         struct wl1251 *wl = hw->priv;
 747         int ret;
 748
 749         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 750
 751         *total &= WL1251_SUPPORTED_FILTERS;
 752         changed &= WL1251_SUPPORTED_FILTERS;
 753
 754         if (changed == 0)
 755                 /* no filters which we support changed */
 756                 return;
 757
 758         mutex_lock(&wl->mutex);
 759
 760         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 761         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 762
 763         if (*total & FIF_PROMISC_IN_BSS) {
 764                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 765                 wl->rx_config |= CFG_RX_ALL_GOOD;
 766         }
 767         if (*total & FIF_ALLMULTI)
 768                 /*
 769                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 770                  * all multicast frames
 771                  */
 772                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 773         if (*total & FIF_FCSFAIL)
 774                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 775         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 776                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 777                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 778         }
 779         if (*total & FIF_CONTROL)
 780                 wl->rx_filter |= CFG_RX_CTL_EN;
 781         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 782                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 783         if (*total & FIF_PROBE_REQ)
 784                 wl->rx_filter |= CFG_RX_PREQ_EN;
 785
 786         if (wl->state == WL1251_STATE_OFF)
 787                 goto out;
 788
 789         ret = wl1251_ps_elp_wakeup(wl);
 790         if (ret < 0)
 791                 goto out;
 792
 793         /* send filters to firmware */
 794         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 795
 796         wl1251_ps_elp_sleep(wl);
 797
 798 out:
 799         mutex_unlock(&wl->mutex);
 800 }
 801
 802 /* HW encryption */
 803 static int wl1251_set_key_type(struct wl1251 *wl,
 804                                struct wl1251_cmd_set_keys *key,
 805                                enum set_key_cmd cmd,
 806                                struct ieee80211_key_conf *mac80211_key,
 807                                const u8 *addr)
 808 {
 809         switch (mac80211_key->cipher) {
 810         case WLAN_CIPHER_SUITE_WEP40:
 811         case WLAN_CIPHER_SUITE_WEP104:
 812                 if (is_broadcast_ether_addr(addr))
 813                         key->key_type = KEY_WEP_DEFAULT;
 814                 else
 815                         key->key_type = KEY_WEP_ADDR;
 816
 817                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 818                 break;
 819         case WLAN_CIPHER_SUITE_TKIP:
 820                 if (is_broadcast_ether_addr(addr))
 821                         key->key_type = KEY_TKIP_MIC_GROUP;
 822                 else
 823                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 824
 825                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 826                 break;
 827         case WLAN_CIPHER_SUITE_CCMP:
 828                 if (is_broadcast_ether_addr(addr))
 829                         key->key_type = KEY_AES_GROUP;
 830                 else
 831                         key->key_type = KEY_AES_PAIRWISE;
 832                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 833                 break;
 834         default:
 835                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 836                 return -EOPNOTSUPP;
 837         }
 838
 839         return 0;
 840 }
 841
 842 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 843                              struct ieee80211_vif *vif,
 844                              struct ieee80211_sta *sta,
 845                              struct ieee80211_key_conf *key)
 846 {
 847         struct wl1251 *wl = hw->priv;
 848         struct wl1251_cmd_set_keys *wl_cmd;
 849         const u8 *addr;
 850         int ret;
 851
 852         static const u8 bcast_addr[ETH_ALEN] =
 853                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 854
 855         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 856
 857         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 858         if (!wl_cmd) {
 859                 ret = -ENOMEM;
 860                 goto out;
 861         }
 862
 863         addr = sta ? sta->addr : bcast_addr;
 864
 865         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 866         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 867         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 868                      key->cipher, key->keyidx, key->keylen, key->flags);
 869         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 870
 871         if (is_zero_ether_addr(addr)) {
 872                 /* We dont support TX only encryption */
 873                 ret = -EOPNOTSUPP;
 874                 goto out;
 875         }
 876
 877         mutex_lock(&wl->mutex);
 878
 879         ret = wl1251_ps_elp_wakeup(wl);
 880         if (ret < 0)
 881                 goto out_unlock;
 882
 883         switch (cmd) {
 884         case SET_KEY:
 885                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 886                 break;
 887         case DISABLE_KEY:
 888                 wl_cmd->key_action = KEY_REMOVE;
 889                 break;
 890         default:
 891                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 892                 break;
 893         }
 894
 895         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 896         if (ret < 0) {
 897                 wl1251_error("Set KEY type failed");
 898                 goto out_sleep;
 899         }
 900
 901         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 902                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 903
 904         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 905             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 906                 /*
 907                  * We get the key in the following form:
 908                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 909                  * but the target is expecting:
 910                  * TKIP - RX MIC - TX MIC
 911                  */
 912                 memcpy(wl_cmd->key, key->key, 16);
 913                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 914                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 915
 916         } else {
 917                 memcpy(wl_cmd->key, key->key, key->keylen);
 918         }
 919         wl_cmd->key_size = key->keylen;
 920
 921         wl_cmd->id = key->keyidx;
 922         wl_cmd->ssid_profile = 0;
 923
 924         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 925
 926         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 927         if (ret < 0) {
 928                 wl1251_warning("could not set keys");
 929                 goto out_sleep;
 930         }
 931
 932 out_sleep:
 933         wl1251_ps_elp_sleep(wl);
 934
 935 out_unlock:
 936         mutex_unlock(&wl->mutex);
 937
 938 out:
 939         kfree(wl_cmd);
 940
 941         return ret;
 942 }
 943
 944 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 945                              struct ieee80211_vif *vif,
 946                              struct cfg80211_scan_request *req)
 947 {
 948         struct wl1251 *wl = hw->priv;
 949         struct sk_buff *skb;
 950         size_t ssid_len = 0;
 951         u8 *ssid = NULL;
 952         int ret;
 953
 954         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 955
 956         if (req->n_ssids) {
 957                 ssid = req->ssids[0].ssid;
 958                 ssid_len = req->ssids[0].ssid_len;
 959         }
 960
 961         mutex_lock(&wl->mutex);
 962
 963         if (wl->scanning) {
 964                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 965                 ret = -EINVAL;
 966                 goto out;
 967         }
 968
 969         ret = wl1251_ps_elp_wakeup(wl);
 970         if (ret < 0)
 971                 goto out;
 972
 973         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 974                                      req->ie, req->ie_len);
 975         if (!skb) {
 976                 ret = -ENOMEM;
 977                 goto out;
 978         }
 979
 980         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 981                                       skb->len);
 982         dev_kfree_skb(skb);
 983         if (ret < 0)
 984                 goto out_sleep;
 985
 986         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 987         if (ret < 0)
 988                 goto out_sleep;
 989
 990         wl->scanning = true;
 991
 992         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 993                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 994         if (ret < 0) {
 995                 wl->scanning = false;
 996                 goto out_sleep;
 997         }
 998
 999 out_sleep:
1000         wl1251_ps_elp_sleep(wl);
1001
1002 out:
1003         mutex_unlock(&wl->mutex);
1004
1005         return ret;
1006 }
1007
1008 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1009 {
1010         struct wl1251 *wl = hw->priv;
1011         int ret;
1012
1013         mutex_lock(&wl->mutex);
1014
1015         ret = wl1251_ps_elp_wakeup(wl);
1016         if (ret < 0)
1017                 goto out;
1018
1019         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1020         if (ret < 0)
1021                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1022
1023         wl1251_ps_elp_sleep(wl);
1024
1025 out:
1026         mutex_unlock(&wl->mutex);
1027
1028         return ret;
1029 }
1030
1031 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1032                                        struct ieee80211_vif *vif,
1033                                        struct ieee80211_bss_conf *bss_conf,
1034                                        u32 changed)
1035 {
1036         struct wl1251 *wl = hw->priv;
1037         struct sk_buff *beacon, *skb;
1038         int ret;
1039
1040         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1041
1042         mutex_lock(&wl->mutex);
1043
1044         ret = wl1251_ps_elp_wakeup(wl);
1045         if (ret < 0)
1046                 goto out;
1047
1048         if (changed & BSS_CHANGED_CQM) {
1049                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1050                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1051                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1052                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1053                 if (ret < 0)
1054                         goto out;
1055                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1056         }
1057
1058         if (changed & BSS_CHANGED_BSSID) {
1059                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1060
1061                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1062                 if (!skb)
1063                         goto out_sleep;
1064
1065                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1066                                               skb->data, skb->len);
1067                 dev_kfree_skb(skb);
1068                 if (ret < 0)
1069                         goto out_sleep;
1070
1071                 ret = wl1251_build_qos_null_data(wl);
1072                 if (ret < 0)
1073                         goto out;
1074
1075                 if (wl->bss_type != BSS_TYPE_IBSS) {
1076                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1077                                           wl->beacon_int, wl->dtim_period);
1078                         if (ret < 0)
1079                                 goto out_sleep;
1080                 }
1081         }
1082
1083         if (changed & BSS_CHANGED_ASSOC) {
1084                 if (bss_conf->assoc) {
1085                         wl->beacon_int = bss_conf->beacon_int;
1086
1087                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1088                         if (!skb)
1089                                 goto out_sleep;
1090
1091                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1092                                                       skb->data,
1093                                                       skb->len);
1094                         dev_kfree_skb(skb);
1095                         if (ret < 0)
1096                                 goto out_sleep;
1097
1098                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1099                         if (ret < 0)
1100                                 goto out_sleep;
1101                 } else {
1102                         /* use defaults when not associated */
1103                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1104                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1105                 }
1106         }
1107         if (changed & BSS_CHANGED_ERP_SLOT) {
1108                 if (bss_conf->use_short_slot)
1109                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1110                 else
1111                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1112                 if (ret < 0) {
1113                         wl1251_warning("Set slot time failed %d", ret);
1114                         goto out_sleep;
1115                 }
1116         }
1117
1118         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1119                 if (bss_conf->use_short_preamble)
1120                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1121                 else
1122                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1123         }
1124
1125         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1126                 if (bss_conf->use_cts_prot)
1127                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1128                 else
1129                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1130                 if (ret < 0) {
1131                         wl1251_warning("Set ctsprotect failed %d", ret);
1132                         goto out_sleep;
1133                 }
1134         }
1135
1136         if (changed & BSS_CHANGED_BEACON) {
1137                 beacon = ieee80211_beacon_get(hw, vif);
1138                 if (!beacon)
1139                         goto out_sleep;
1140
1141                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1142                                               beacon->len);
1143
1144                 if (ret < 0) {
1145                         dev_kfree_skb(beacon);
1146                         goto out_sleep;
1147                 }
1148
1149                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1150                                               beacon->len);
1151
1152                 dev_kfree_skb(beacon);
1153
1154                 if (ret < 0)
1155                         goto out_sleep;
1156
1157                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1158                                   wl->channel, wl->dtim_period);
1159
1160                 if (ret < 0)
1161                         goto out_sleep;
1162         }
1163
1164 out_sleep:
1165         wl1251_ps_elp_sleep(wl);
1166
1167 out:
1168         mutex_unlock(&wl->mutex);
1169 }
1170
1171
1172 /* can't be const, mac80211 writes to this */
1173 static struct ieee80211_rate wl1251_rates[] = {
1174         { .bitrate = 10,
1175           .hw_value = 0x1,
1176           .hw_value_short = 0x1, },
1177         { .bitrate = 20,
1178           .hw_value = 0x2,
1179           .hw_value_short = 0x2,
1180           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1181         { .bitrate = 55,
1182           .hw_value = 0x4,
1183           .hw_value_short = 0x4,
1184           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1185         { .bitrate = 110,
1186           .hw_value = 0x20,
1187           .hw_value_short = 0x20,
1188           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1189         { .bitrate = 60,
1190           .hw_value = 0x8,
1191           .hw_value_short = 0x8, },
1192         { .bitrate = 90,
1193           .hw_value = 0x10,
1194           .hw_value_short = 0x10, },
1195         { .bitrate = 120,
1196           .hw_value = 0x40,
1197           .hw_value_short = 0x40, },
1198         { .bitrate = 180,
1199           .hw_value = 0x80,
1200           .hw_value_short = 0x80, },
1201         { .bitrate = 240,
1202           .hw_value = 0x200,
1203           .hw_value_short = 0x200, },
1204         { .bitrate = 360,
1205          .hw_value = 0x400,
1206          .hw_value_short = 0x400, },
1207         { .bitrate = 480,
1208           .hw_value = 0x800,
1209           .hw_value_short = 0x800, },
1210         { .bitrate = 540,
1211           .hw_value = 0x1000,
1212           .hw_value_short = 0x1000, },
1213 };
1214
1215 /* can't be const, mac80211 writes to this */
1216 static struct ieee80211_channel wl1251_channels[] = {
1217         { .hw_value = 1, .center_freq = 2412},
1218         { .hw_value = 2, .center_freq = 2417},
1219         { .hw_value = 3, .center_freq = 2422},
1220         { .hw_value = 4, .center_freq = 2427},
1221         { .hw_value = 5, .center_freq = 2432},
1222         { .hw_value = 6, .center_freq = 2437},
1223         { .hw_value = 7, .center_freq = 2442},
1224         { .hw_value = 8, .center_freq = 2447},
1225         { .hw_value = 9, .center_freq = 2452},
1226         { .hw_value = 10, .center_freq = 2457},
1227         { .hw_value = 11, .center_freq = 2462},
1228         { .hw_value = 12, .center_freq = 2467},
1229         { .hw_value = 13, .center_freq = 2472},
1230 };
1231
1232 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1233                              struct ieee80211_vif *vif, u16 queue,
1234                              const struct ieee80211_tx_queue_params *params)
1235 {
1236         enum wl1251_acx_ps_scheme ps_scheme;
1237         struct wl1251 *wl = hw->priv;
1238         int ret;
1239
1240         mutex_lock(&wl->mutex);
1241
1242         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1243
1244         ret = wl1251_ps_elp_wakeup(wl);
1245         if (ret < 0)
1246                 goto out;
1247
1248         /* mac80211 uses units of 32 usec */
1249         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1250                                 params->cw_min, params->cw_max,
1251                                 params->aifs, params->txop * 32);
1252         if (ret < 0)
1253                 goto out_sleep;
1254
1255         if (params->uapsd)
1256                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1257         else
1258                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1259
1260         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1261                                  CHANNEL_TYPE_EDCF,
1262                                  wl1251_tx_get_queue(queue), ps_scheme,
1263                                  WL1251_ACX_ACK_POLICY_LEGACY);
1264         if (ret < 0)
1265                 goto out_sleep;
1266
1267 out_sleep:
1268         wl1251_ps_elp_sleep(wl);
1269
1270 out:
1271         mutex_unlock(&wl->mutex);
1272
1273         return ret;
1274 }
1275
1276 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1277                                 struct survey_info *survey)
1278 {
1279         struct wl1251 *wl = hw->priv;
1280         struct ieee80211_conf *conf = &hw->conf;
1281
1282         if (idx != 0)
1283                 return -ENOENT;
1284
1285         survey->channel = conf->channel;
1286         survey->filled = SURVEY_INFO_NOISE_DBM;
1287         survey->noise = wl->noise;
1288
1289         return 0;
1290 }
1291
1292 /* can't be const, mac80211 writes to this */
1293 static struct ieee80211_supported_band wl1251_band_2ghz = {
1294         .channels = wl1251_channels,
1295         .n_channels = ARRAY_SIZE(wl1251_channels),
1296         .bitrates = wl1251_rates,
1297         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1298 };
1299
1300 static const struct ieee80211_ops wl1251_ops = {
1301         .start = wl1251_op_start,
1302         .stop = wl1251_op_stop,
1303         .add_interface = wl1251_op_add_interface,
1304         .remove_interface = wl1251_op_remove_interface,
1305         .config = wl1251_op_config,
1306         .configure_filter = wl1251_op_configure_filter,
1307         .tx = wl1251_op_tx,
1308         .set_key = wl1251_op_set_key,
1309         .hw_scan = wl1251_op_hw_scan,
1310         .bss_info_changed = wl1251_op_bss_info_changed,
1311         .set_rts_threshold = wl1251_op_set_rts_threshold,
1312         .conf_tx = wl1251_op_conf_tx,
1313         .get_survey = wl1251_op_get_survey,
1314 };
1315
1316 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1317 {
1318         unsigned long timeout;
1319
1320         wl1251_reg_write32(wl, EE_ADDR, offset);
1321         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1322
1323         /* EE_CTL_READ clears when data is ready */
1324         timeout = jiffies + msecs_to_jiffies(100);
1325         while (1) {
1326                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1327                         break;
1328
1329                 if (time_after(jiffies, timeout))
1330                         return -ETIMEDOUT;
1331
1332                 msleep(1);
1333         }
1334
1335         *data = wl1251_reg_read32(wl, EE_DATA);
1336         return 0;
1337 }
1338
1339 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1340                               u8 *data, size_t len)
1341 {
1342         size_t i;
1343         int ret;
1344
1345         wl1251_reg_write32(wl, EE_START, 0);
1346
1347         for (i = 0; i < len; i++) {
1348                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1349                 if (ret < 0)
1350                         return ret;
1351         }
1352
1353         return 0;
1354 }
1355
1356 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1357 {
1358         u8 mac[ETH_ALEN];
1359         int i, ret;
1360
1361         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1362
1363         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1364         if (ret < 0) {
1365                 wl1251_warning("failed to read MAC address from EEPROM");
1366                 return ret;
1367         }
1368
1369         /* MAC is stored in reverse order */
1370         for (i = 0; i < ETH_ALEN; i++)
1371                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1372
1373         return 0;
1374 }
1375
1376 /* temporary (?) hack for EEPROM dumping
1377  * (it seems this can only be done before fw is running) */
1378 static int wl1251_dump_eeprom(struct wl1251 *wl)
1379 {
1380         int ret;
1381
1382         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1383
1384         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1385         if (wl->eeprom_dump == NULL) {
1386                 ret = -ENOMEM;
1387                 goto out;
1388         }
1389
1390         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1391         if (ret != 0) {
1392                 wl1251_error("eeprom dump failed: %d", ret);
1393                 kfree(wl->eeprom_dump);
1394                 wl->eeprom_dump = NULL;
1395                 goto out;
1396         }
1397
1398         wl1251_info("eeprom dumped.");
1399
1400 out:
1401         return ret;
1402 }
1403
1404 static int wl1251_register_hw(struct wl1251 *wl)
1405 {
1406         int ret;
1407
1408         if (wl->mac80211_registered)
1409                 return 0;
1410
1411         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1412
1413         ret = ieee80211_register_hw(wl->hw);
1414         if (ret < 0) {
1415                 wl1251_error("unable to register mac80211 hw: %d", ret);
1416                 return ret;
1417         }
1418
1419         wl->mac80211_registered = true;
1420
1421         wl1251_notice("loaded");
1422
1423         return 0;
1424 }
1425
1426 int wl1251_init_ieee80211(struct wl1251 *wl)
1427 {
1428         int ret;
1429
1430         /* The tx descriptor buffer and the TKIP space */
1431         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1432                 + WL1251_TKIP_IV_SPACE;
1433
1434         /* unit us */
1435         /* FIXME: find a proper value */
1436         wl->hw->channel_change_time = 10000;
1437
1438         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1439                 IEEE80211_HW_SUPPORTS_PS |
1440                 IEEE80211_HW_BEACON_FILTER |
1441                 IEEE80211_HW_SUPPORTS_UAPSD |
1442                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1443
1444         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1445                                          BIT(NL80211_IFTYPE_ADHOC);
1446         wl->hw->wiphy->max_scan_ssids = 1;
1447         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1448
1449         wl->hw->queues = 4;
1450
1451         if (wl->use_eeprom)
1452                 wl1251_read_eeprom_mac(wl);
1453         if (wl->dump_eeprom)
1454                 wl1251_dump_eeprom(wl);
1455
1456         ret = wl1251_register_hw(wl);
1457         if (ret)
1458                 goto out;
1459
1460         wl1251_debugfs_init(wl);
1461         wl1251_notice("initialized");
1462
1463         ret = 0;
1464
1465 out:
1466         return ret;
1467 }
1468 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1469
1470 struct ieee80211_hw *wl1251_alloc_hw(void)
1471 {
1472         struct ieee80211_hw *hw;
1473         struct wl1251 *wl;
1474         int i;
1475         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1476
1477         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1478         if (!hw) {
1479                 wl1251_error("could not alloc ieee80211_hw");
1480                 return ERR_PTR(-ENOMEM);
1481         }
1482
1483         wl = hw->priv;
1484         memset(wl, 0, sizeof(*wl));
1485
1486         wl->hw = hw;
1487
1488         wl->data_in_count = 0;
1489
1490         skb_queue_head_init(&wl->tx_queue);
1491
1492         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1493         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1494         wl->channel = WL1251_DEFAULT_CHANNEL;
1495         wl->scanning = false;
1496         wl->default_key = 0;
1497         wl->listen_int = 1;
1498         wl->rx_counter = 0;
1499         wl->rx_handled = 0;
1500         wl->rx_current_buffer = 0;
1501         wl->rx_last_id = 0;
1502         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1503         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1504         wl->elp = false;
1505         wl->station_mode = STATION_ACTIVE_MODE;
1506         wl->psm_requested = false;
1507         wl->tx_queue_stopped = false;
1508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1509         wl->rssi_thold = 0;
1510         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1511         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1512         wl->vif = NULL;
1513
1514         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1515                 wl->tx_frames[i] = NULL;
1516
1517         wl->next_tx_complete = 0;
1518
1519         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1520         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1521
1522         /*
1523          * In case our MAC address is not correctly set,
1524          * we use a random but Nokia MAC.
1525          */
1526         memcpy(wl->mac_addr, nokia_oui, 3);
1527         get_random_bytes(wl->mac_addr + 3, 3);
1528
1529         wl->state = WL1251_STATE_OFF;
1530         mutex_init(&wl->mutex);
1531
1532         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1533         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1534
1535         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1536         if (!wl->rx_descriptor) {
1537                 wl1251_error("could not allocate memory for rx descriptor");
1538                 ieee80211_free_hw(hw);
1539                 return ERR_PTR(-ENOMEM);
1540         }
1541
1542         return hw;
1543 }
1544 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1545
1546 int wl1251_free_hw(struct wl1251 *wl)
1547 {
1548         ieee80211_unregister_hw(wl->hw);
1549
1550         wl1251_debugfs_exit(wl);
1551
1552         kfree(wl->target_mem_map);
1553         kfree(wl->data_path);
1554         vfree(wl->fw);
1555         wl->fw = NULL;
1556         kfree(wl->nvs);
1557         wl->nvs = NULL;
1558
1559         kfree(wl->rx_descriptor);
1560         wl->rx_descriptor = NULL;
1561
1562         ieee80211_free_hw(wl->hw);
1563
1564         if (wl->eeprom_dump != NULL)
1565                 kfree(wl->eeprom_dump);
1566
1567         return 0;
1568 }
1569 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1570
1571 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1572 MODULE_LICENSE("GPL");
1573 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1574 MODULE_FIRMWARE(WL1251_FW_NAME);