drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #if (LINUX_VERSION_CODE == KERNEL_VERSION(2,6,28))
  30 #include <linux/device.h>
  31 #endif
  32 #include <linux/crc32.h>
  33 #include <linux/etherdevice.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include "wl1251.h"
  37 #include "wl12xx_80211.h"
  38 #include "wl1251_reg.h"
  39 #include "wl1251_io.h"
  40 #include "wl1251_cmd.h"
  41 #include "wl1251_event.h"
  42 #include "wl1251_tx.h"
  43 #include "wl1251_rx.h"
  44 #include "wl1251_ps.h"
  45 #include "wl1251_init.h"
  46 #include "wl1251_debugfs.h"
  47 #include "wl1251_boot.h"
  48
  49 /* HACK */
  50 #ifndef FIF_PROBE_REQ
  51 #define FIF_PROBE_REQ 0
  52 #endif
  53
  54 void wl1251_enable_interrupts(struct wl1251 *wl)
  55 {
  56         wl->if_ops->enable_irq(wl);
  57 }
  58
  59 void wl1251_disable_interrupts(struct wl1251 *wl)
  60 {
  61         wl->if_ops->disable_irq(wl);
  62 }
  63
  64 static void wl1251_power_off(struct wl1251 *wl)
  65 {
  66         wl->set_power(false);
  67 }
  68
  69 static void wl1251_power_on(struct wl1251 *wl)
  70 {
  71         wl->set_power(true);
  72 }
  73
  74 static int wl1251_fetch_firmware(struct wl1251 *wl)
  75 {
  76         const struct firmware *fw;
  77         struct device *dev = wiphy_dev(wl->hw->wiphy);
  78         int ret;
  79
  80         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  81
  82         if (ret < 0) {
  83                 wl1251_error("could not get firmware: %d", ret);
  84                 return ret;
  85         }
  86
  87         if (fw->size % 4) {
  88                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  89                              fw->size);
  90                 ret = -EILSEQ;
  91                 goto out;
  92         }
  93
  94         wl->fw_len = fw->size;
  95         wl->fw = vmalloc(wl->fw_len);
  96
  97         if (!wl->fw) {
  98                 wl1251_error("could not allocate memory for the firmware");
  99                 ret = -ENOMEM;
 100                 goto out;
 101         }
 102
 103         memcpy(wl->fw, fw->data, wl->fw_len);
 104
 105         ret = 0;
 106
 107 out:
 108         release_firmware(fw);
 109
 110         return ret;
 111 }
 112
 113 static int wl1251_fetch_nvs(struct wl1251 *wl)
 114 {
 115         const struct firmware *fw;
 116         struct device *dev = wiphy_dev(wl->hw->wiphy);
 117         int ret;
 118
 119         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 120
 121         if (ret < 0) {
 122                 wl1251_error("could not get nvs file: %d", ret);
 123                 return ret;
 124         }
 125
 126         if (fw->size % 4) {
 127                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 128                              fw->size);
 129                 ret = -EILSEQ;
 130                 goto out;
 131         }
 132
 133         wl->nvs_len = fw->size;
 134         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 135
 136         if (!wl->nvs) {
 137                 wl1251_error("could not allocate memory for the nvs file");
 138                 ret = -ENOMEM;
 139                 goto out;
 140         }
 141
 142         ret = 0;
 143
 144 out:
 145         release_firmware(fw);
 146
 147         return ret;
 148 }
 149
 150 static void wl1251_fw_wakeup(struct wl1251 *wl)
 151 {
 152         u32 elp_reg;
 153
 154         elp_reg = ELPCTRL_WAKE_UP;
 155         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 156         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 157
 158         if (!(elp_reg & ELPCTRL_WLAN_READY))
 159                 wl1251_warning("WLAN not ready");
 160 }
 161
 162 static int wl1251_chip_wakeup(struct wl1251 *wl)
 163 {
 164         int ret = 0;
 165
 166         wl1251_power_on(wl);
 167         msleep(WL1251_POWER_ON_SLEEP);
 168         wl->if_ops->reset(wl);
 169
 170         /* We don't need a real memory partition here, because we only want
 171          * to use the registers at this point. */
 172         wl1251_set_partition(wl,
 173                              0x00000000,
 174                              0x00000000,
 175                              REGISTERS_BASE,
 176                              REGISTERS_DOWN_SIZE);
 177
 178         /* ELP module wake up */
 179         wl1251_fw_wakeup(wl);
 180
 181         /* whal_FwCtrl_BootSm() */
 182
 183         /* 0. read chip id from CHIP_ID */
 184         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 185
 186         /* 1. check if chip id is valid */
 187
 188         switch (wl->chip_id) {
 189         case CHIP_ID_1251_PG12:
 190                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 191                              wl->chip_id);
 192                 break;
 193         case CHIP_ID_1251_PG11:
 194                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 195                              wl->chip_id);
 196                 break;
 197         case CHIP_ID_1251_PG10:
 198         default:
 199                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 200                 ret = -ENODEV;
 201                 goto out;
 202         }
 203
 204         if (wl->fw == NULL) {
 205                 ret = wl1251_fetch_firmware(wl);
 206                 if (ret < 0)
 207                         goto out;
 208         }
 209
 210         if (wl->nvs == NULL && !wl->use_eeprom) {
 211                 /* No NVS from netlink, try to get it from the filesystem */
 212                 ret = wl1251_fetch_nvs(wl);
 213                 if (ret < 0)
 214                         goto out;
 215         }
 216
 217 out:
 218         return ret;
 219 }
 220
 221 #define WL1251_IRQ_LOOP_COUNT 10
 222 static void wl1251_irq_work(struct work_struct *work)
 223 {
 224         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 225         struct wl1251 *wl =
 226                 container_of(work, struct wl1251, irq_work);
 227         int ret;
 228
 229         mutex_lock(&wl->mutex);
 230
 231         wl1251_debug(DEBUG_IRQ, "IRQ work");
 232
 233         if (wl->state == WL1251_STATE_OFF)
 234                 goto out;
 235
 236         ret = wl1251_ps_elp_wakeup(wl);
 237         if (ret < 0)
 238                 goto out;
 239
 240         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 241
 242         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 243         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 244
 245         do {
 246                 if (wl->data_path) {
 247                         wl->rx_counter = wl1251_mem_read32(
 248                                 wl, wl->data_path->rx_control_addr);
 249
 250                         /* We handle a frmware bug here */
 251                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 252                         case 0:
 253                                 wl1251_debug(DEBUG_IRQ,
 254                                              "RX: FW and host in sync");
 255                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 1:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         case 2:
 264                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 265                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 266                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 267                                 break;
 268                         default:
 269                                 wl1251_warning(
 270                                         "RX: FW and host out of sync: %d",
 271                                         wl->rx_counter - wl->rx_handled);
 272                                 break;
 273                         }
 274
 275                         wl->rx_handled = wl->rx_counter;
 276
 277                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 278                                      wl->rx_counter);
 279                 }
 280
 281                 intr &= wl->intr_mask;
 282
 283                 if (intr == 0) {
 284                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 285                         goto out_sleep;
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 295                         wl1251_rx(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 300                         wl1251_tx_complete(wl);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 305                         wl1251_event_handle(wl, 0);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 309                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 310                         wl1251_event_handle(wl, 1);
 311                 }
 312
 313                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 314                         wl1251_debug(DEBUG_IRQ,
 315                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 316
 317                 if (--ctr == 0)
 318                         break;
 319
 320                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 321         } while (intr);
 322
 323 out_sleep:
 324         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 325         wl1251_ps_elp_sleep(wl);
 326
 327 out:
 328         mutex_unlock(&wl->mutex);
 329 }
 330
 331 /* Atomic irq handler */
 332 void wl1251_irq(struct wl1251 *wl)
 333 {
 334         unsigned long flags;
 335
 336         wl1251_debug(DEBUG_IRQ, "IRQ");
 337
 338         /* complete the ELP completion */
 339         spin_lock_irqsave(&wl->wl_lock, flags);
 340         if (wl->elp_compl) {
 341                 complete(wl->elp_compl);
 342                 wl->elp_compl = NULL;
 343         }
 344         spin_unlock_irqrestore(&wl->wl_lock, flags);
 345
 346         ieee80211_queue_work(wl->hw, &wl->irq_work);
 347 }
 348 EXPORT_SYMBOL_GPL(wl1251_irq);
 349
 350 static void wl1251_convert_filters(struct wl1251 *wl,
 351                                   unsigned int mac80211_filters)
 352 {
 353         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 354         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 355
 356         if (mac80211_filters & FIF_PROMISC_IN_BSS) {
 357                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 358                 wl->rx_config &= ~CFG_UNI_FILTER_EN;
 359         }
 360         if (mac80211_filters & FIF_ALLMULTI)
 361                 /*
 362                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 363                  * all multicast frames
 364                  */
 365                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 366         if (mac80211_filters & FIF_FCSFAIL)
 367                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 368         if (mac80211_filters & FIF_BCN_PRBRESP_PROMISC) {
 369                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 370                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 371         }
 372         if (mac80211_filters & FIF_CONTROL)
 373                 wl->rx_filter |= CFG_RX_CTL_EN;
 374         if (mac80211_filters & FIF_OTHER_BSS)
 375                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 376         if (mac80211_filters & FIF_PROBE_REQ)
 377                 wl->rx_filter |= CFG_RX_PREQ_EN;
 378
 379         /*
 380          * If we have no associated BSSID, the filter must be disabled
 381          * or else association will break
 382          */
 383         if (is_zero_ether_addr(wl->bssid))
 384                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 385
 386         wl1251_debug(DEBUG_FILTERS, "rx_config %04x, rx_filter %04x",
 387                 wl->rx_config, wl->rx_filter);
 388 }
 389
 390 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 391                        u16 beacon_interval, u8 dtim_period)
 392 {
 393         int ret;
 394
 395         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 396                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 397                                      wl->tx_mgmt_frm_rate,
 398                                      wl->tx_mgmt_frm_mod);
 399         if (ret < 0)
 400                 goto out;
 401
 402         /* Join uses filters, update them */
 403         wl1251_convert_filters(wl, wl->mac80211_filters);
 404
 405         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 406                               dtim_period);
 407         if (ret < 0)
 408                 goto out;
 409
 410         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 411         if (ret < 0)
 412                 wl1251_warning("join timeout");
 413
 414 out:
 415         return ret;
 416 }
 417
 418 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 419 {
 420         struct wl1251 *wl = hw->priv;
 421         unsigned long flags;
 422
 423         skb_queue_tail(&wl->tx_queue, skb);
 424
 425         /*
 426          * The chip specific setup must run before the first TX packet -
 427          * before that, the tx_work will not be initialized!
 428          */
 429
 430         ieee80211_queue_work(wl->hw, &wl->tx_work);
 431
 432         /*
 433          * The workqueue is slow to process the tx_queue and we need stop
 434          * the queue here, otherwise the queue will get too long.
 435          */
 436         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 437                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 438
 439                 spin_lock_irqsave(&wl->wl_lock, flags);
 440                 ieee80211_stop_queues(wl->hw);
 441                 wl->tx_queue_stopped = true;
 442                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 443         }
 444
 445         return NETDEV_TX_OK;
 446 }
 447
 448 static int wl1251_op_start(struct ieee80211_hw *hw)
 449 {
 450         struct wl1251 *wl = hw->priv;
 451         struct wiphy *wiphy = hw->wiphy;
 452         int ret = 0;
 453
 454         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 455
 456         mutex_lock(&wl->mutex);
 457
 458         if (wl->state != WL1251_STATE_OFF) {
 459                 wl1251_error("cannot start because not in off state: %d",
 460                              wl->state);
 461                 ret = -EBUSY;
 462                 goto out;
 463         }
 464
 465         ret = wl1251_chip_wakeup(wl);
 466         if (ret < 0)
 467                 goto out;
 468
 469         ret = wl1251_boot(wl);
 470         if (ret < 0)
 471                 goto out;
 472
 473         ret = wl1251_hw_init(wl);
 474         if (ret < 0)
 475                 goto out;
 476
 477         ret = wl1251_acx_station_id(wl);
 478         if (ret < 0)
 479                 goto out;
 480
 481         wl->state = WL1251_STATE_ON;
 482
 483         wl1251_info("firmware booted (%s)", wl->fw_ver);
 484
 485         /* update hw/fw version info in wiphy struct */
 486         wiphy->hw_version = wl->chip_id;
 487         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 488
 489 out:
 490         if (ret < 0)
 491                 wl1251_power_off(wl);
 492
 493         mutex_unlock(&wl->mutex);
 494
 495         return ret;
 496 }
 497
 498 static void wl1251_op_stop(struct ieee80211_hw *hw)
 499 {
 500         struct wl1251 *wl = hw->priv;
 501
 502         wl1251_info("down");
 503
 504         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 505
 506         mutex_lock(&wl->mutex);
 507
 508         WARN_ON(wl->state != WL1251_STATE_ON);
 509
 510         if (wl->scanning) {
 511                 mutex_unlock(&wl->mutex);
 512                 ieee80211_scan_completed(wl->hw, true);
 513                 mutex_lock(&wl->mutex);
 514                 wl->scanning = false;
 515         }
 516
 517         wl->state = WL1251_STATE_OFF;
 518
 519         wl1251_disable_interrupts(wl);
 520
 521         mutex_unlock(&wl->mutex);
 522
 523         cancel_work_sync(&wl->irq_work);
 524         cancel_work_sync(&wl->tx_work);
 525
 526         mutex_lock(&wl->mutex);
 527
 528         /* let's notify MAC80211 about the remaining pending TX frames */
 529         wl1251_tx_flush(wl);
 530         wl1251_power_off(wl);
 531
 532         memset(wl->bssid, 0, ETH_ALEN);
 533         wl->listen_int = 1;
 534         wl->bss_type = MAX_BSS_TYPE;
 535
 536         wl->data_in_count = 0;
 537         wl->rx_counter = 0;
 538         wl->rx_handled = 0;
 539         wl->rx_current_buffer = 0;
 540         wl->rx_last_id = 0;
 541         wl->next_tx_complete = 0;
 542         wl->elp = false;
 543         wl->station_mode = STATION_ACTIVE_MODE;
 544         wl->tx_queue_stopped = false;
 545         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 546         wl->channel = WL1251_DEFAULT_CHANNEL;
 547
 548         wl1251_debugfs_reset(wl);
 549
 550         mutex_unlock(&wl->mutex);
 551 }
 552
 553 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 554                                    struct ieee80211_vif *vif)
 555 {
 556         struct wl1251 *wl = hw->priv;
 557         int ret = 0;
 558
 559         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 560                      vif->type, vif->addr);
 561
 562         mutex_lock(&wl->mutex);
 563         if (wl->vif) {
 564                 ret = -EBUSY;
 565                 goto out;
 566         }
 567
 568         wl->vif = vif;
 569
 570         switch (vif->type) {
 571         case NL80211_IFTYPE_STATION:
 572                 wl->bss_type = BSS_TYPE_STA_BSS;
 573                 break;
 574         case NL80211_IFTYPE_ADHOC:
 575                 wl->bss_type = BSS_TYPE_IBSS;
 576                 break;
 577         default:
 578                 ret = -EOPNOTSUPP;
 579                 goto out;
 580         }
 581
 582         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 583                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 584                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 585                 ret = wl1251_acx_station_id(wl);
 586                 if (ret < 0)
 587                         goto out;
 588         }
 589
 590 out:
 591         mutex_unlock(&wl->mutex);
 592         return ret;
 593 }
 594
 595 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 596                                          struct ieee80211_vif *vif)
 597 {
 598         struct wl1251 *wl = hw->priv;
 599
 600         mutex_lock(&wl->mutex);
 601         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 602         wl->vif = NULL;
 603         mutex_unlock(&wl->mutex);
 604 }
 605
 606 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 607 {
 608         struct ieee80211_qos_hdr template;
 609
 610         memset(&template, 0, sizeof(template));
 611
 612         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 613         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 614         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 615
 616         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 617                                              IEEE80211_STYPE_QOS_NULLFUNC |
 618                                              IEEE80211_FCTL_TODS);
 619
 620         /* FIXME: not sure what priority to use here */
 621         template.qos_ctrl = cpu_to_le16(0);
 622
 623         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 624                                        sizeof(template));
 625 }
 626
 627 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 628 {
 629         struct wl1251 *wl = hw->priv;
 630         struct ieee80211_conf *conf = &hw->conf;
 631         int channel, ret = 0;
 632
 633         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 634
 635         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 636                      channel,
 637                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 638                      conf->power_level);
 639
 640         mutex_lock(&wl->mutex);
 641
 642         ret = wl1251_ps_elp_wakeup(wl);
 643         if (ret < 0)
 644                 goto out;
 645
 646         if (channel != wl->channel) {
 647                 wl->channel = channel;
 648
 649                 /*
 650                  * Use ENABLE_RX command for channel switching when no
 651                  * interface is present (monitor mode only).
 652                  * This leaves the tx path disabled in firmware, whereas
 653                  * the usual JOIN command seems to transmit some frames
 654                  * at firmware level.
 655                  */
 656                 if (wl->vif == NULL) {
 657                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 658                 } else {
 659                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 660                                           wl->beacon_int, wl->dtim_period);
 661                 }
 662                 if (ret < 0)
 663                         goto out_sleep;
 664         }
 665
 666         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 667                 wl1251_debug(DEBUG_PSM, "psm enabled");
 668
 669                 wl->psm_requested = true;
 670
 671                 wl->dtim_period = conf->ps_dtim_period;
 672
 673                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 674                                                   wl->dtim_period);
 675
 676                 /*
 677                  * mac80211 enables PSM only if we're already associated.
 678                  */
 679                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 680                 if (ret < 0)
 681                         goto out_sleep;
 682         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 683                    wl->psm_requested) {
 684                 wl1251_debug(DEBUG_PSM, "psm disabled");
 685
 686                 wl->psm_requested = false;
 687
 688                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 689                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 690                         if (ret < 0)
 691                                 goto out_sleep;
 692                 }
 693         }
 694
 695         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 696                 if (conf->flags & IEEE80211_CONF_IDLE) {
 697                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 698                         if (ret < 0)
 699                                 goto out_sleep;
 700                 } else {
 701                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 702                         if (ret < 0)
 703                                 goto out_sleep;
 704                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 705                                           wl->beacon_int, wl->dtim_period);
 706                         if (ret < 0)
 707                                 goto out_sleep;
 708                 }
 709         }
 710
 711         if (conf->power_level != wl->power_level) {
 712                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 713                 if (ret < 0)
 714                         goto out_sleep;
 715
 716                 wl->power_level = conf->power_level;
 717         }
 718
 719 out_sleep:
 720         wl1251_ps_elp_sleep(wl);
 721
 722 out:
 723         mutex_unlock(&wl->mutex);
 724
 725         return ret;
 726 }
 727
 728 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 729                                   FIF_ALLMULTI | \
 730                                   FIF_FCSFAIL | \
 731                                   FIF_BCN_PRBRESP_PROMISC | \
 732                                   FIF_CONTROL | \
 733                                   FIF_OTHER_BSS | \
 734                                   FIF_PROBE_REQ)
 735
 736 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 737                                        unsigned int changed,
 738                                        unsigned int *total,u64 multicast)
 739 {
 740         struct wl1251 *wl = hw->priv;
 741         int ret;
 742
 743         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 744         wl1251_debug(DEBUG_FILTERS, "configure filter %x %x", *total, changed);
 745
 746         *total &= WL1251_SUPPORTED_FILTERS;
 747         changed &= WL1251_SUPPORTED_FILTERS;
 748
 749         if (changed == 0)
 750                 /* no filters which we support changed */
 751                 return;
 752
 753         mutex_lock(&wl->mutex);
 754
 755         wl->mac80211_filters = *total;
 756         wl1251_convert_filters(wl, *total);
 757
 758         if (wl->state == WL1251_STATE_OFF)
 759                 goto out;
 760
 761         ret = wl1251_ps_elp_wakeup(wl);
 762         if (ret < 0)
 763                 goto out;
 764
 765         /* apply configured filters */
 766         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 767
 768         wl1251_ps_elp_sleep(wl);
 769
 770 out:
 771         mutex_unlock(&wl->mutex);
 772 }
 773
 774 /* HW encryption */
 775 static int wl1251_set_key_type(struct wl1251 *wl,
 776                                struct wl1251_cmd_set_keys *key,
 777                                enum set_key_cmd cmd,
 778                                struct ieee80211_key_conf *mac80211_key,
 779                                const u8 *addr)
 780 {
 781         switch (mac80211_key->alg) {
 782         case ALG_WEP:
 783                 if (is_broadcast_ether_addr(addr))
 784                         key->key_type = KEY_WEP_DEFAULT;
 785                 else
 786                         key->key_type = KEY_WEP_ADDR;
 787
 788                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 789                 break;
 790         case ALG_TKIP:
 791                 if (is_broadcast_ether_addr(addr))
 792                         key->key_type = KEY_TKIP_MIC_GROUP;
 793                 else
 794                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 795
 796                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 797                 break;
 798         case ALG_CCMP:
 799                 if (is_broadcast_ether_addr(addr))
 800                         key->key_type = KEY_AES_GROUP;
 801                 else
 802                         key->key_type = KEY_AES_PAIRWISE;
 803                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 804                 break;
 805         default:
 806                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 807                 return -EOPNOTSUPP;
 808         }
 809
 810         return 0;
 811 }
 812
 813 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 814                              struct ieee80211_vif *vif,
 815                              struct ieee80211_sta *sta,
 816                              struct ieee80211_key_conf *key)
 817 {
 818         struct wl1251 *wl = hw->priv;
 819         struct wl1251_cmd_set_keys *wl_cmd;
 820         const u8 *addr;
 821         int ret;
 822
 823         static const u8 bcast_addr[ETH_ALEN] =
 824                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 825
 826         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 827
 828         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 829         if (!wl_cmd) {
 830                 ret = -ENOMEM;
 831                 goto out;
 832         }
 833
 834         addr = sta ? sta->addr : bcast_addr;
 835
 836         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 837         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 838         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 839                      key->alg, key->keyidx, key->keylen, key->flags);
 840         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 841
 842         if (is_zero_ether_addr(addr)) {
 843                 /* We dont support TX only encryption */
 844                 ret = -EOPNOTSUPP;
 845                 goto out;
 846         }
 847
 848         mutex_lock(&wl->mutex);
 849
 850         ret = wl1251_ps_elp_wakeup(wl);
 851         if (ret < 0)
 852                 goto out_unlock;
 853
 854         switch (cmd) {
 855         case SET_KEY:
 856                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 857                 break;
 858         case DISABLE_KEY:
 859                 wl_cmd->key_action = KEY_REMOVE;
 860                 break;
 861         default:
 862                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 863                 break;
 864         }
 865
 866         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 867         if (ret < 0) {
 868                 wl1251_error("Set KEY type failed");
 869                 goto out_sleep;
 870         }
 871
 872         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 873                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 874
 875         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 876             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 877                 /*
 878                  * We get the key in the following form:
 879                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 880                  * but the target is expecting:
 881                  * TKIP - RX MIC - TX MIC
 882                  */
 883                 memcpy(wl_cmd->key, key->key, 16);
 884                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 885                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 886
 887         } else {
 888                 memcpy(wl_cmd->key, key->key, key->keylen);
 889         }
 890         wl_cmd->key_size = key->keylen;
 891
 892         wl_cmd->id = key->keyidx;
 893         wl_cmd->ssid_profile = 0;
 894
 895         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 896
 897         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 898         if (ret < 0) {
 899                 wl1251_warning("could not set keys");
 900                 goto out_sleep;
 901         }
 902
 903 out_sleep:
 904         wl1251_ps_elp_sleep(wl);
 905
 906 out_unlock:
 907         mutex_unlock(&wl->mutex);
 908
 909 out:
 910         kfree(wl_cmd);
 911
 912         return ret;
 913 }
 914
 915 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 916                              struct cfg80211_scan_request *req)
 917 {
 918         struct wl1251 *wl = hw->priv;
 919         struct sk_buff *skb;
 920         size_t ssid_len = 0;
 921         u8 *ssid = NULL;
 922         int ret;
 923
 924         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 925
 926         if (req->n_ssids) {
 927                 ssid = req->ssids[0].ssid;
 928                 ssid_len = req->ssids[0].ssid_len;
 929         }
 930
 931         mutex_lock(&wl->mutex);
 932
 933         if (wl->scanning) {
 934                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 935                 ret = -EINVAL;
 936                 goto out;
 937         }
 938
 939         ret = wl1251_ps_elp_wakeup(wl);
 940         if (ret < 0)
 941                 goto out;
 942
 943         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 944                                      req->ie, req->ie_len);
 945         if (!skb) {
 946                 ret = -ENOMEM;
 947                 goto out;
 948         }
 949
 950         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 951                                       skb->len);
 952         dev_kfree_skb(skb);
 953         if (ret < 0)
 954                 goto out_sleep;
 955
 956         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 957         if (ret < 0)
 958                 goto out_sleep;
 959
 960         wl->scanning = true;
 961
 962         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 963                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 964         if (ret < 0) {
 965                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
 966                 wl->scanning = false;
 967                 goto out_sleep;
 968         }
 969
 970 out_sleep:
 971         wl1251_ps_elp_sleep(wl);
 972
 973 out:
 974         mutex_unlock(&wl->mutex);
 975
 976         return ret;
 977 }
 978
 979 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 980 {
 981         struct wl1251 *wl = hw->priv;
 982         int ret;
 983
 984         mutex_lock(&wl->mutex);
 985
 986         ret = wl1251_ps_elp_wakeup(wl);
 987         if (ret < 0)
 988                 goto out;
 989
 990         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 991         if (ret < 0)
 992                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 993
 994         wl1251_ps_elp_sleep(wl);
 995
 996 out:
 997         mutex_unlock(&wl->mutex);
 998
 999         return ret;
1000 }
1001
1002 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1003                                        struct ieee80211_vif *vif,
1004                                        struct ieee80211_bss_conf *bss_conf,
1005                                        u32 changed)
1006 {
1007         struct wl1251 *wl = hw->priv;
1008         struct sk_buff *beacon, *skb;
1009         int ret;
1010
1011         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1012
1013         mutex_lock(&wl->mutex);
1014
1015         ret = wl1251_ps_elp_wakeup(wl);
1016         if (ret < 0)
1017                 goto out;
1018
1019         if (changed & BSS_CHANGED_BSSID) {
1020                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1021
1022                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1023                 if (!skb)
1024                         goto out_sleep;
1025
1026                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1027                                               skb->data, skb->len);
1028                 dev_kfree_skb(skb);
1029                 if (ret < 0)
1030                         goto out_sleep;
1031
1032                 ret = wl1251_build_qos_null_data(wl);
1033                 if (ret < 0)
1034                         goto out;
1035
1036                 if (wl->bss_type != BSS_TYPE_IBSS) {
1037                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1038                                           wl->beacon_int, wl->dtim_period);
1039                         if (ret < 0)
1040                                 goto out_sleep;
1041                 }
1042         }
1043
1044         if (changed & BSS_CHANGED_ASSOC) {
1045                 if (bss_conf->assoc) {
1046                         wl->beacon_int = bss_conf->beacon_int;
1047
1048                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1049                         if (!skb)
1050                                 goto out_sleep;
1051
1052                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1053                                                       skb->data,
1054                                                       skb->len);
1055                         dev_kfree_skb(skb);
1056                         if (ret < 0)
1057                                 goto out_sleep;
1058
1059                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1060                         if (ret < 0)
1061                                 goto out_sleep;
1062                 } else {
1063                         /* use defaults when not associated */
1064                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1065                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1066                 }
1067         }
1068         if (changed & BSS_CHANGED_ERP_SLOT) {
1069                 if (bss_conf->use_short_slot)
1070                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1071                 else
1072                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1073                 if (ret < 0) {
1074                         wl1251_warning("Set slot time failed %d", ret);
1075                         goto out_sleep;
1076                 }
1077         }
1078
1079         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1080                 if (bss_conf->use_short_preamble)
1081                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1082                 else
1083                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1084         }
1085
1086         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1087                 if (bss_conf->use_cts_prot)
1088                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1089                 else
1090                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1091                 if (ret < 0) {
1092                         wl1251_warning("Set ctsprotect failed %d", ret);
1093                         goto out_sleep;
1094                 }
1095         }
1096
1097         if (changed & BSS_CHANGED_BEACON) {
1098                 beacon = ieee80211_beacon_get(hw, vif);
1099                 if (!beacon)
1100                         goto out_sleep;
1101
1102                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1103                                               beacon->len);
1104
1105                 if (ret < 0) {
1106                         dev_kfree_skb(beacon);
1107                         goto out_sleep;
1108                 }
1109
1110                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1111                                               beacon->len);
1112
1113                 dev_kfree_skb(beacon);
1114
1115                 if (ret < 0)
1116                         goto out_sleep;
1117
1118                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1119                                   wl->channel, wl->dtim_period);
1120
1121                 if (ret < 0)
1122                         goto out_sleep;
1123         }
1124
1125 out_sleep:
1126         wl1251_ps_elp_sleep(wl);
1127
1128 out:
1129         mutex_unlock(&wl->mutex);
1130 }
1131
1132
1133 /* can't be const, mac80211 writes to this */
1134 static struct ieee80211_rate wl1251_rates[] = {
1135         { .bitrate = 10,
1136           .hw_value = 0x1,
1137           .hw_value_short = 0x1, },
1138         { .bitrate = 20,
1139           .hw_value = 0x2,
1140           .hw_value_short = 0x2,
1141           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1142         { .bitrate = 55,
1143           .hw_value = 0x4,
1144           .hw_value_short = 0x4,
1145           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1146         { .bitrate = 110,
1147           .hw_value = 0x20,
1148           .hw_value_short = 0x20,
1149           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1150         { .bitrate = 60,
1151           .hw_value = 0x8,
1152           .hw_value_short = 0x8, },
1153         { .bitrate = 90,
1154           .hw_value = 0x10,
1155           .hw_value_short = 0x10, },
1156         { .bitrate = 120,
1157           .hw_value = 0x40,
1158           .hw_value_short = 0x40, },
1159         { .bitrate = 180,
1160           .hw_value = 0x80,
1161           .hw_value_short = 0x80, },
1162         { .bitrate = 240,
1163           .hw_value = 0x200,
1164           .hw_value_short = 0x200, },
1165         { .bitrate = 360,
1166          .hw_value = 0x400,
1167          .hw_value_short = 0x400, },
1168         { .bitrate = 480,
1169           .hw_value = 0x800,
1170           .hw_value_short = 0x800, },
1171         { .bitrate = 540,
1172           .hw_value = 0x1000,
1173           .hw_value_short = 0x1000, },
1174 };
1175
1176 /* can't be const, mac80211 writes to this */
1177 static struct ieee80211_channel wl1251_channels[] = {
1178         { .hw_value = 1, .center_freq = 2412},
1179         { .hw_value = 2, .center_freq = 2417},
1180         { .hw_value = 3, .center_freq = 2422},
1181         { .hw_value = 4, .center_freq = 2427},
1182         { .hw_value = 5, .center_freq = 2432},
1183         { .hw_value = 6, .center_freq = 2437},
1184         { .hw_value = 7, .center_freq = 2442},
1185         { .hw_value = 8, .center_freq = 2447},
1186         { .hw_value = 9, .center_freq = 2452},
1187         { .hw_value = 10, .center_freq = 2457},
1188         { .hw_value = 11, .center_freq = 2462},
1189         { .hw_value = 12, .center_freq = 2467},
1190         { .hw_value = 13, .center_freq = 2472},
1191 };
1192
1193 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1194                              const struct ieee80211_tx_queue_params *params)
1195 {
1196         enum wl1251_acx_ps_scheme ps_scheme;
1197         struct wl1251 *wl = hw->priv;
1198         int ret;
1199
1200         mutex_lock(&wl->mutex);
1201
1202         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1203
1204         ret = wl1251_ps_elp_wakeup(wl);
1205         if (ret < 0)
1206                 goto out;
1207
1208         /* mac80211 uses units of 32 usec */
1209         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1210                                 params->cw_min, params->cw_max,
1211                                 params->aifs, params->txop * 32);
1212         if (ret < 0)
1213                 goto out_sleep;
1214
1215         if (params->uapsd)
1216                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1217         else
1218                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1219
1220         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1221                                  CHANNEL_TYPE_EDCF,
1222                                  wl1251_tx_get_queue(queue), ps_scheme,
1223                                  WL1251_ACX_ACK_POLICY_LEGACY);
1224         if (ret < 0)
1225                 goto out_sleep;
1226
1227 out_sleep:
1228         wl1251_ps_elp_sleep(wl);
1229
1230 out:
1231         mutex_unlock(&wl->mutex);
1232
1233         return ret;
1234 }
1235
1236 /* can't be const, mac80211 writes to this */
1237 static struct ieee80211_supported_band wl1251_band_2ghz = {
1238         .channels = wl1251_channels,
1239         .n_channels = ARRAY_SIZE(wl1251_channels),
1240         .bitrates = wl1251_rates,
1241         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1242 };
1243
1244 static const struct ieee80211_ops wl1251_ops = {
1245         .start = wl1251_op_start,
1246         .stop = wl1251_op_stop,
1247         .add_interface = wl1251_op_add_interface,
1248         .remove_interface = wl1251_op_remove_interface,
1249         .config = wl1251_op_config,
1250         .configure_filter = wl1251_op_configure_filter,
1251         .tx = wl1251_op_tx,
1252         .set_key = wl1251_op_set_key,
1253         .hw_scan = wl1251_op_hw_scan,
1254         .bss_info_changed = wl1251_op_bss_info_changed,
1255         .set_rts_threshold = wl1251_op_set_rts_threshold,
1256         .conf_tx = wl1251_op_conf_tx,
1257 };
1258
1259 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1260 {
1261         unsigned long timeout;
1262
1263         wl1251_reg_write32(wl, EE_ADDR, offset);
1264         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1265
1266         /* EE_CTL_READ clears when data is ready */
1267         timeout = jiffies + msecs_to_jiffies(100);
1268         while (1) {
1269                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1270                         break;
1271
1272                 if (time_after(jiffies, timeout))
1273                         return -ETIMEDOUT;
1274
1275                 msleep(1);
1276         }
1277
1278         *data = wl1251_reg_read32(wl, EE_DATA);
1279         return 0;
1280 }
1281
1282 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1283                               u8 *data, size_t len)
1284 {
1285         size_t i;
1286         int ret;
1287
1288         wl1251_reg_write32(wl, EE_START, 0);
1289
1290         for (i = 0; i < len; i++) {
1291                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1292                 if (ret < 0)
1293                         return ret;
1294         }
1295
1296         return 0;
1297 }
1298
1299 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1300 {
1301         u8 mac[ETH_ALEN];
1302         int i, ret;
1303
1304         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1305
1306         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1307         if (ret < 0) {
1308                 wl1251_warning("failed to read MAC address from EEPROM");
1309                 return ret;
1310         }
1311
1312         /* MAC is stored in reverse order */
1313         for (i = 0; i < ETH_ALEN; i++)
1314                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1315
1316         return 0;
1317 }
1318
1319 static int wl1251_register_hw(struct wl1251 *wl)
1320 {
1321         int ret;
1322
1323         if (wl->mac80211_registered)
1324                 return 0;
1325
1326         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1327
1328         ret = ieee80211_register_hw(wl->hw);
1329         if (ret < 0) {
1330                 wl1251_error("unable to register mac80211 hw: %d", ret);
1331                 return ret;
1332         }
1333
1334         wl->mac80211_registered = true;
1335
1336         wl1251_notice("loaded");
1337
1338         return 0;
1339 }
1340
1341 int wl1251_init_ieee80211(struct wl1251 *wl)
1342 {
1343         int ret;
1344
1345         /* The tx descriptor buffer and the TKIP space */
1346         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1347                 + WL1251_TKIP_IV_SPACE;
1348
1349         /* unit us */
1350         /* FIXME: find a proper value */
1351         wl->hw->channel_change_time = 10000;
1352
1353         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1354                 IEEE80211_HW_NOISE_DBM |
1355                 IEEE80211_HW_SUPPORTS_PS |
1356                 IEEE80211_HW_BEACON_FILTER |
1357                 IEEE80211_HW_SUPPORTS_UAPSD;
1358
1359         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1360                                          BIT(NL80211_IFTYPE_ADHOC);
1361         wl->hw->wiphy->max_scan_ssids = 1;
1362         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1363
1364         wl->hw->queues = 4;
1365
1366         if (wl->use_eeprom)
1367                 wl1251_read_eeprom_mac(wl);
1368
1369         ret = wl1251_register_hw(wl);
1370         if (ret)
1371                 goto out;
1372
1373         wl1251_debugfs_init(wl);
1374         wl1251_notice("initialized");
1375
1376         ret = 0;
1377
1378 out:
1379         return ret;
1380 }
1381 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1382
1383 struct ieee80211_hw *wl1251_alloc_hw(void)
1384 {
1385         struct ieee80211_hw *hw;
1386         struct wl1251 *wl;
1387         int i;
1388         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1389
1390         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1391         if (!hw) {
1392                 wl1251_error("could not alloc ieee80211_hw");
1393                 return ERR_PTR(-ENOMEM);
1394         }
1395
1396         wl = hw->priv;
1397         memset(wl, 0, sizeof(*wl));
1398
1399         wl->hw = hw;
1400
1401         wl->data_in_count = 0;
1402
1403         skb_queue_head_init(&wl->tx_queue);
1404
1405         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1406         wl->channel = WL1251_DEFAULT_CHANNEL;
1407         wl->scanning = false;
1408         wl->default_key = 0;
1409         wl->listen_int = 1;
1410         wl->rx_counter = 0;
1411         wl->rx_handled = 0;
1412         wl->rx_current_buffer = 0;
1413         wl->rx_last_id = 0;
1414         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1415         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1416         wl->elp = false;
1417         wl->station_mode = STATION_ACTIVE_MODE;
1418         wl->psm_requested = false;
1419         wl->tx_queue_stopped = false;
1420         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1421         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1422         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1423         wl->vif = NULL;
1424
1425         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1426                 wl->tx_frames[i] = NULL;
1427
1428         wl->next_tx_complete = 0;
1429
1430         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1431         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1432
1433         /*
1434          * In case our MAC address is not correctly set,
1435          * we use a random but Nokia MAC.
1436          */
1437         memcpy(wl->mac_addr, nokia_oui, 3);
1438         get_random_bytes(wl->mac_addr + 3, 3);
1439
1440         wl->state = WL1251_STATE_OFF;
1441         mutex_init(&wl->mutex);
1442
1443         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1444         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1445
1446         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1447         if (!wl->rx_descriptor) {
1448                 wl1251_error("could not allocate memory for rx descriptor");
1449                 ieee80211_free_hw(hw);
1450                 return ERR_PTR(-ENOMEM);
1451         }
1452
1453         return hw;
1454 }
1455 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1456
1457 int wl1251_free_hw(struct wl1251 *wl)
1458 {
1459         ieee80211_unregister_hw(wl->hw);
1460
1461         wl1251_debugfs_exit(wl);
1462
1463         kfree(wl->target_mem_map);
1464         kfree(wl->data_path);
1465         vfree(wl->fw);
1466         wl->fw = NULL;
1467         kfree(wl->nvs);
1468         wl->nvs = NULL;
1469
1470         kfree(wl->rx_descriptor);
1471         wl->rx_descriptor = NULL;
1472
1473         ieee80211_free_hw(wl->hw);
1474
1475         return 0;
1476 }
1477 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1478
1479 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1480 MODULE_LICENSE("GPL");
1481 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1482 MODULE_FIRMWARE(WL1251_FW_NAME);