Pileus Git - ~andy/linux/blob - 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 #include <linux/crc32.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/vmalloc.h>
  32 #include <linux/slab.h>
  33
  34 #include "wl1251.h"
  35 #include "wl12xx_80211.h"
  36 #include "wl1251_reg.h"
  37 #include "wl1251_io.h"
  38 #include "wl1251_cmd.h"
  39 #include "wl1251_event.h"
  40 #include "wl1251_tx.h"
  41 #include "wl1251_rx.h"
  42 #include "wl1251_ps.h"
  43 #include "wl1251_init.h"
  44 #include "wl1251_debugfs.h"
  45 #include "wl1251_boot.h"
  46
  47 void wl1251_enable_interrupts(struct wl1251 *wl)
  48 {
  49         wl->if_ops->enable_irq(wl);
  50 }
  51
  52 void wl1251_disable_interrupts(struct wl1251 *wl)
  53 {
  54         wl->if_ops->disable_irq(wl);
  55 }
  56
  57 static void wl1251_power_off(struct wl1251 *wl)
  58 {
  59         wl->set_power(false);
  60 }
  61
  62 static void wl1251_power_on(struct wl1251 *wl)
  63 {
  64         wl->set_power(true);
  65 }
  66
  67 static int wl1251_fetch_firmware(struct wl1251 *wl)
  68 {
  69         const struct firmware *fw;
  70         struct device *dev = wiphy_dev(wl->hw->wiphy);
  71         int ret;
  72
  73         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  74
  75         if (ret < 0) {
  76                 wl1251_error("could not get firmware: %d", ret);
  77                 return ret;
  78         }
  79
  80         if (fw->size % 4) {
  81                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  82                              fw->size);
  83                 ret = -EILSEQ;
  84                 goto out;
  85         }
  86
  87         wl->fw_len = fw->size;
  88         wl->fw = vmalloc(wl->fw_len);
  89
  90         if (!wl->fw) {
  91                 wl1251_error("could not allocate memory for the firmware");
  92                 ret = -ENOMEM;
  93                 goto out;
  94         }
  95
  96         memcpy(wl->fw, fw->data, wl->fw_len);
  97
  98         ret = 0;
  99
 100 out:
 101         release_firmware(fw);
 102
 103         return ret;
 104 }
 105
 106 static int wl1251_fetch_nvs(struct wl1251 *wl)
 107 {
 108         const struct firmware *fw;
 109         struct device *dev = wiphy_dev(wl->hw->wiphy);
 110         int ret;
 111
 112         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 113
 114         if (ret < 0) {
 115                 wl1251_error("could not get nvs file: %d", ret);
 116                 return ret;
 117         }
 118
 119         if (fw->size % 4) {
 120                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 121                              fw->size);
 122                 ret = -EILSEQ;
 123                 goto out;
 124         }
 125
 126         wl->nvs_len = fw->size;
 127         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 128
 129         if (!wl->nvs) {
 130                 wl1251_error("could not allocate memory for the nvs file");
 131                 ret = -ENOMEM;
 132                 goto out;
 133         }
 134
 135         ret = 0;
 136
 137 out:
 138         release_firmware(fw);
 139
 140         return ret;
 141 }
 142
 143 static void wl1251_fw_wakeup(struct wl1251 *wl)
 144 {
 145         u32 elp_reg;
 146
 147         elp_reg = ELPCTRL_WAKE_UP;
 148         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 149         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 150
 151         if (!(elp_reg & ELPCTRL_WLAN_READY))
 152                 wl1251_warning("WLAN not ready");
 153 }
 154
 155 static int wl1251_chip_wakeup(struct wl1251 *wl)
 156 {
 157         int ret = 0;
 158
 159         wl1251_power_on(wl);
 160         msleep(WL1251_POWER_ON_SLEEP);
 161         wl->if_ops->reset(wl);
 162
 163         /* We don't need a real memory partition here, because we only want
 164          * to use the registers at this point. */
 165         wl1251_set_partition(wl,
 166                              0x00000000,
 167                              0x00000000,
 168                              REGISTERS_BASE,
 169                              REGISTERS_DOWN_SIZE);
 170
 171         /* ELP module wake up */
 172         wl1251_fw_wakeup(wl);
 173
 174         /* whal_FwCtrl_BootSm() */
 175
 176         /* 0. read chip id from CHIP_ID */
 177         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 178
 179         /* 1. check if chip id is valid */
 180
 181         switch (wl->chip_id) {
 182         case CHIP_ID_1251_PG12:
 183                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 184                              wl->chip_id);
 185                 break;
 186         case CHIP_ID_1251_PG11:
 187                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 188                              wl->chip_id);
 189                 break;
 190         case CHIP_ID_1251_PG10:
 191         default:
 192                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 193                 ret = -ENODEV;
 194                 goto out;
 195         }
 196
 197         if (wl->fw == NULL) {
 198                 ret = wl1251_fetch_firmware(wl);
 199                 if (ret < 0)
 200                         goto out;
 201         }
 202
 203         if (wl->nvs == NULL && !wl->use_eeprom) {
 204                 /* No NVS from netlink, try to get it from the filesystem */
 205                 ret = wl1251_fetch_nvs(wl);
 206                 if (ret < 0)
 207                         goto out;
 208         }
 209
 210 out:
 211         return ret;
 212 }
 213
 214 #define WL1251_IRQ_LOOP_COUNT 10
 215 static void wl1251_irq_work(struct work_struct *work)
 216 {
 217         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 218         struct wl1251 *wl =
 219                 container_of(work, struct wl1251, irq_work);
 220         int ret;
 221
 222         mutex_lock(&wl->mutex);
 223
 224         wl1251_debug(DEBUG_IRQ, "IRQ work");
 225
 226         if (wl->state == WL1251_STATE_OFF)
 227                 goto out;
 228
 229         ret = wl1251_ps_elp_wakeup(wl);
 230         if (ret < 0)
 231                 goto out;
 232
 233         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 234
 235         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 236         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 237
 238         do {
 239                 if (wl->data_path) {
 240                         wl->rx_counter = wl1251_mem_read32(
 241                                 wl, wl->data_path->rx_control_addr);
 242
 243                         /* We handle a frmware bug here */
 244                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 245                         case 0:
 246                                 wl1251_debug(DEBUG_IRQ,
 247                                              "RX: FW and host in sync");
 248                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 249                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 250                                 break;
 251                         case 1:
 252                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 253                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 254                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 255                                 break;
 256                         case 2:
 257                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 258                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 259                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 260                                 break;
 261                         default:
 262                                 wl1251_warning(
 263                                         "RX: FW and host out of sync: %d",
 264                                         wl->rx_counter - wl->rx_handled);
 265                                 break;
 266                         }
 267
 268                         wl->rx_handled = wl->rx_counter;
 269
 270                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 271                                      wl->rx_counter);
 272                 }
 273
 274                 intr &= wl->intr_mask;
 275
 276                 if (intr == 0) {
 277                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 278                         goto out_sleep;
 279                 }
 280
 281                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 282                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 283                         wl1251_rx(wl);
 284                 }
 285
 286                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 287                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 288                         wl1251_rx(wl);
 289                 }
 290
 291                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 292                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 293                         wl1251_tx_complete(wl);
 294                 }
 295
 296                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 297                             WL1251_ACX_INTR_EVENT_B)) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 299                                      intr);
 300                         if (intr & WL1251_ACX_INTR_EVENT_A)
 301                                 wl1251_event_handle(wl, 0);
 302                         else
 303                                 wl1251_event_handle(wl, 1);
 304                 }
 305
 306                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 307                         wl1251_debug(DEBUG_IRQ,
 308                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 309
 310                 if (--ctr == 0)
 311                         break;
 312
 313                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 314         } while (intr);
 315
 316 out_sleep:
 317         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 318         wl1251_ps_elp_sleep(wl);
 319
 320 out:
 321         mutex_unlock(&wl->mutex);
 322 }
 323
 324 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 325                        u16 beacon_interval, u8 dtim_period)
 326 {
 327         int ret;
 328
 329         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 330                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 331                                      wl->tx_mgmt_frm_rate,
 332                                      wl->tx_mgmt_frm_mod);
 333         if (ret < 0)
 334                 goto out;
 335
 336
 337         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 338                               dtim_period);
 339         if (ret < 0)
 340                 goto out;
 341
 342         /*
 343          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 344          * locking we just sleep instead, for now
 345          */
 346         msleep(10);
 347
 348 out:
 349         return ret;
 350 }
 351
 352 static void wl1251_filter_work(struct work_struct *work)
 353 {
 354         struct wl1251 *wl =
 355                 container_of(work, struct wl1251, filter_work);
 356         int ret;
 357
 358         mutex_lock(&wl->mutex);
 359
 360         if (wl->state == WL1251_STATE_OFF)
 361                 goto out;
 362
 363         ret = wl1251_ps_elp_wakeup(wl);
 364         if (ret < 0)
 365                 goto out;
 366
 367         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 368                           wl->dtim_period);
 369         if (ret < 0)
 370                 goto out_sleep;
 371
 372 out_sleep:
 373         wl1251_ps_elp_sleep(wl);
 374
 375 out:
 376         mutex_unlock(&wl->mutex);
 377 }
 378
 379 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 380 {
 381         struct wl1251 *wl = hw->priv;
 382
 383         skb_queue_tail(&wl->tx_queue, skb);
 384
 385         /*
 386          * The chip specific setup must run before the first TX packet -
 387          * before that, the tx_work will not be initialized!
 388          */
 389
 390         ieee80211_queue_work(wl->hw, &wl->tx_work);
 391
 392         /*
 393          * The workqueue is slow to process the tx_queue and we need stop
 394          * the queue here, otherwise the queue will get too long.
 395          */
 396         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 397                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 398                 ieee80211_stop_queues(wl->hw);
 399
 400                 /*
 401                  * FIXME: this is racy, the variable is not properly
 402                  * protected. Maybe fix this by removing the stupid
 403                  * variable altogether and checking the real queue state?
 404                  */
 405                 wl->tx_queue_stopped = true;
 406         }
 407
 408         return NETDEV_TX_OK;
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         int ret = 0;
 415
 416         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 417
 418         mutex_lock(&wl->mutex);
 419
 420         if (wl->state != WL1251_STATE_OFF) {
 421                 wl1251_error("cannot start because not in off state: %d",
 422                              wl->state);
 423                 ret = -EBUSY;
 424                 goto out;
 425         }
 426
 427         ret = wl1251_chip_wakeup(wl);
 428         if (ret < 0)
 429                 goto out;
 430
 431         ret = wl1251_boot(wl);
 432         if (ret < 0)
 433                 goto out;
 434
 435         ret = wl1251_hw_init(wl);
 436         if (ret < 0)
 437                 goto out;
 438
 439         ret = wl1251_acx_station_id(wl);
 440         if (ret < 0)
 441                 goto out;
 442
 443         wl->state = WL1251_STATE_ON;
 444
 445         wl1251_info("firmware booted (%s)", wl->fw_ver);
 446
 447 out:
 448         if (ret < 0)
 449                 wl1251_power_off(wl);
 450
 451         mutex_unlock(&wl->mutex);
 452
 453         return ret;
 454 }
 455
 456 static void wl1251_op_stop(struct ieee80211_hw *hw)
 457 {
 458         struct wl1251 *wl = hw->priv;
 459
 460         wl1251_info("down");
 461
 462         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 463
 464         mutex_lock(&wl->mutex);
 465
 466         WARN_ON(wl->state != WL1251_STATE_ON);
 467
 468         if (wl->scanning) {
 469                 mutex_unlock(&wl->mutex);
 470                 ieee80211_scan_completed(wl->hw, true);
 471                 mutex_lock(&wl->mutex);
 472                 wl->scanning = false;
 473         }
 474
 475         wl->state = WL1251_STATE_OFF;
 476
 477         wl1251_disable_interrupts(wl);
 478
 479         mutex_unlock(&wl->mutex);
 480
 481         cancel_work_sync(&wl->irq_work);
 482         cancel_work_sync(&wl->tx_work);
 483         cancel_work_sync(&wl->filter_work);
 484
 485         mutex_lock(&wl->mutex);
 486
 487         /* let's notify MAC80211 about the remaining pending TX frames */
 488         wl1251_tx_flush(wl);
 489         wl1251_power_off(wl);
 490
 491         memset(wl->bssid, 0, ETH_ALEN);
 492         wl->listen_int = 1;
 493         wl->bss_type = MAX_BSS_TYPE;
 494
 495         wl->data_in_count = 0;
 496         wl->rx_counter = 0;
 497         wl->rx_handled = 0;
 498         wl->rx_current_buffer = 0;
 499         wl->rx_last_id = 0;
 500         wl->next_tx_complete = 0;
 501         wl->elp = false;
 502         wl->psm = 0;
 503         wl->tx_queue_stopped = false;
 504         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 505         wl->channel = WL1251_DEFAULT_CHANNEL;
 506
 507         wl1251_debugfs_reset(wl);
 508
 509         mutex_unlock(&wl->mutex);
 510 }
 511
 512 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 513                                    struct ieee80211_vif *vif)
 514 {
 515         struct wl1251 *wl = hw->priv;
 516         int ret = 0;
 517
 518         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 519                      vif->type, vif->addr);
 520
 521         mutex_lock(&wl->mutex);
 522         if (wl->vif) {
 523                 ret = -EBUSY;
 524                 goto out;
 525         }
 526
 527         wl->vif = vif;
 528
 529         switch (vif->type) {
 530         case NL80211_IFTYPE_STATION:
 531                 wl->bss_type = BSS_TYPE_STA_BSS;
 532                 break;
 533         case NL80211_IFTYPE_ADHOC:
 534                 wl->bss_type = BSS_TYPE_IBSS;
 535                 break;
 536         default:
 537                 ret = -EOPNOTSUPP;
 538                 goto out;
 539         }
 540
 541         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 542                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 543                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 544                 ret = wl1251_acx_station_id(wl);
 545                 if (ret < 0)
 546                         goto out;
 547         }
 548
 549 out:
 550         mutex_unlock(&wl->mutex);
 551         return ret;
 552 }
 553
 554 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 555                                          struct ieee80211_vif *vif)
 556 {
 557         struct wl1251 *wl = hw->priv;
 558
 559         mutex_lock(&wl->mutex);
 560         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 561         wl->vif = NULL;
 562         mutex_unlock(&wl->mutex);
 563 }
 564
 565 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 566 {
 567         struct ieee80211_qos_hdr template;
 568
 569         memset(&template, 0, sizeof(template));
 570
 571         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 572         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 573         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 574
 575         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 576                                              IEEE80211_STYPE_QOS_NULLFUNC |
 577                                              IEEE80211_FCTL_TODS);
 578
 579         /* FIXME: not sure what priority to use here */
 580         template.qos_ctrl = cpu_to_le16(0);
 581
 582         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 583                                        sizeof(template));
 584 }
 585
 586 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 587 {
 588         struct wl1251 *wl = hw->priv;
 589         struct ieee80211_conf *conf = &hw->conf;
 590         int channel, ret = 0;
 591
 592         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 593
 594         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 595                      channel,
 596                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 597                      conf->power_level);
 598
 599         mutex_lock(&wl->mutex);
 600
 601         ret = wl1251_ps_elp_wakeup(wl);
 602         if (ret < 0)
 603                 goto out;
 604
 605         if (channel != wl->channel) {
 606                 wl->channel = channel;
 607
 608                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 609                                   wl->beacon_int, wl->dtim_period);
 610                 if (ret < 0)
 611                         goto out_sleep;
 612         }
 613
 614         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 615                 wl1251_debug(DEBUG_PSM, "psm enabled");
 616
 617                 wl->psm_requested = true;
 618
 619                 wl->dtim_period = conf->ps_dtim_period;
 620
 621                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 622                                                   wl->dtim_period);
 623
 624                 /*
 625                  * mac80211 enables PSM only if we're already associated.
 626                  */
 627                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 628                 if (ret < 0)
 629                         goto out_sleep;
 630         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 631                    wl->psm_requested) {
 632                 wl1251_debug(DEBUG_PSM, "psm disabled");
 633
 634                 wl->psm_requested = false;
 635
 636                 if (wl->psm) {
 637                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 638                         if (ret < 0)
 639                                 goto out_sleep;
 640                 }
 641         }
 642
 643         if (conf->power_level != wl->power_level) {
 644                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 645                 if (ret < 0)
 646                         goto out_sleep;
 647
 648                 wl->power_level = conf->power_level;
 649         }
 650
 651 out_sleep:
 652         wl1251_ps_elp_sleep(wl);
 653
 654 out:
 655         mutex_unlock(&wl->mutex);
 656
 657         return ret;
 658 }
 659
 660 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 661                                   FIF_ALLMULTI | \
 662                                   FIF_FCSFAIL | \
 663                                   FIF_BCN_PRBRESP_PROMISC | \
 664                                   FIF_CONTROL | \
 665                                   FIF_OTHER_BSS)
 666
 667 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 668                                        unsigned int changed,
 669                                        unsigned int *total,u64 multicast)
 670 {
 671         struct wl1251 *wl = hw->priv;
 672
 673         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 674
 675         *total &= WL1251_SUPPORTED_FILTERS;
 676         changed &= WL1251_SUPPORTED_FILTERS;
 677
 678         if (changed == 0)
 679                 /* no filters which we support changed */
 680                 return;
 681
 682         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 683
 684         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 685         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 686
 687         if (*total & FIF_PROMISC_IN_BSS) {
 688                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 689                 wl->rx_config |= CFG_RX_ALL_GOOD;
 690         }
 691         if (*total & FIF_ALLMULTI)
 692                 /*
 693                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 694                  * all multicast frames
 695                  */
 696                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 697         if (*total & FIF_FCSFAIL)
 698                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 699         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 700                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 701                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 702         }
 703         if (*total & FIF_CONTROL)
 704                 wl->rx_filter |= CFG_RX_CTL_EN;
 705         if (*total & FIF_OTHER_BSS)
 706                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 707
 708         /*
 709          * FIXME: workqueues need to be properly cancelled on stop(), for
 710          * now let's just disable changing the filter settings. They will
 711          * be updated any on config().
 712          */
 713         /* schedule_work(&wl->filter_work); */
 714 }
 715
 716 /* HW encryption */
 717 static int wl1251_set_key_type(struct wl1251 *wl,
 718                                struct wl1251_cmd_set_keys *key,
 719                                enum set_key_cmd cmd,
 720                                struct ieee80211_key_conf *mac80211_key,
 721                                const u8 *addr)
 722 {
 723         switch (mac80211_key->alg) {
 724         case ALG_WEP:
 725                 if (is_broadcast_ether_addr(addr))
 726                         key->key_type = KEY_WEP_DEFAULT;
 727                 else
 728                         key->key_type = KEY_WEP_ADDR;
 729
 730                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 731                 break;
 732         case ALG_TKIP:
 733                 if (is_broadcast_ether_addr(addr))
 734                         key->key_type = KEY_TKIP_MIC_GROUP;
 735                 else
 736                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 737
 738                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 739                 break;
 740         case ALG_CCMP:
 741                 if (is_broadcast_ether_addr(addr))
 742                         key->key_type = KEY_AES_GROUP;
 743                 else
 744                         key->key_type = KEY_AES_PAIRWISE;
 745                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 746                 break;
 747         default:
 748                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 749                 return -EOPNOTSUPP;
 750         }
 751
 752         return 0;
 753 }
 754
 755 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 756                              struct ieee80211_vif *vif,
 757                              struct ieee80211_sta *sta,
 758                              struct ieee80211_key_conf *key)
 759 {
 760         struct wl1251 *wl = hw->priv;
 761         struct wl1251_cmd_set_keys *wl_cmd;
 762         const u8 *addr;
 763         int ret;
 764
 765         static const u8 bcast_addr[ETH_ALEN] =
 766                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 767
 768         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 769
 770         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 771         if (!wl_cmd) {
 772                 ret = -ENOMEM;
 773                 goto out;
 774         }
 775
 776         addr = sta ? sta->addr : bcast_addr;
 777
 778         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 779         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 780         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 781                      key->alg, key->keyidx, key->keylen, key->flags);
 782         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 783
 784         if (is_zero_ether_addr(addr)) {
 785                 /* We dont support TX only encryption */
 786                 ret = -EOPNOTSUPP;
 787                 goto out;
 788         }
 789
 790         mutex_lock(&wl->mutex);
 791
 792         ret = wl1251_ps_elp_wakeup(wl);
 793         if (ret < 0)
 794                 goto out_unlock;
 795
 796         switch (cmd) {
 797         case SET_KEY:
 798                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 799                 break;
 800         case DISABLE_KEY:
 801                 wl_cmd->key_action = KEY_REMOVE;
 802                 break;
 803         default:
 804                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 805                 break;
 806         }
 807
 808         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 809         if (ret < 0) {
 810                 wl1251_error("Set KEY type failed");
 811                 goto out_sleep;
 812         }
 813
 814         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 815                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 816
 817         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 818             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 819                 /*
 820                  * We get the key in the following form:
 821                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 822                  * but the target is expecting:
 823                  * TKIP - RX MIC - TX MIC
 824                  */
 825                 memcpy(wl_cmd->key, key->key, 16);
 826                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 827                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 828
 829         } else {
 830                 memcpy(wl_cmd->key, key->key, key->keylen);
 831         }
 832         wl_cmd->key_size = key->keylen;
 833
 834         wl_cmd->id = key->keyidx;
 835         wl_cmd->ssid_profile = 0;
 836
 837         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 838
 839         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 840         if (ret < 0) {
 841                 wl1251_warning("could not set keys");
 842                 goto out_sleep;
 843         }
 844
 845 out_sleep:
 846         wl1251_ps_elp_sleep(wl);
 847
 848 out_unlock:
 849         mutex_unlock(&wl->mutex);
 850
 851 out:
 852         kfree(wl_cmd);
 853
 854         return ret;
 855 }
 856
 857 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 858                              struct ieee80211_vif *vif,
 859                              struct cfg80211_scan_request *req)
 860 {
 861         struct wl1251 *wl = hw->priv;
 862         struct sk_buff *skb;
 863         size_t ssid_len = 0;
 864         u8 *ssid = NULL;
 865         int ret;
 866
 867         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 868
 869         if (req->n_ssids) {
 870                 ssid = req->ssids[0].ssid;
 871                 ssid_len = req->ssids[0].ssid_len;
 872         }
 873
 874         mutex_lock(&wl->mutex);
 875
 876         if (wl->scanning) {
 877                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 878                 ret = -EINVAL;
 879                 goto out;
 880         }
 881
 882         ret = wl1251_ps_elp_wakeup(wl);
 883         if (ret < 0)
 884                 goto out;
 885
 886         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 887                                      req->ie, req->ie_len);
 888         if (!skb) {
 889                 ret = -ENOMEM;
 890                 goto out;
 891         }
 892
 893         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 894                                       skb->len);
 895         dev_kfree_skb(skb);
 896         if (ret < 0)
 897                 goto out_sleep;
 898
 899         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 900         if (ret < 0)
 901                 goto out_sleep;
 902
 903         wl->scanning = true;
 904
 905         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 906                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 907         if (ret < 0) {
 908                 wl->scanning = false;
 909                 goto out_sleep;
 910         }
 911
 912 out_sleep:
 913         wl1251_ps_elp_sleep(wl);
 914
 915 out:
 916         mutex_unlock(&wl->mutex);
 917
 918         return ret;
 919 }
 920
 921 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 922 {
 923         struct wl1251 *wl = hw->priv;
 924         int ret;
 925
 926         mutex_lock(&wl->mutex);
 927
 928         ret = wl1251_ps_elp_wakeup(wl);
 929         if (ret < 0)
 930                 goto out;
 931
 932         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 933         if (ret < 0)
 934                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 935
 936         wl1251_ps_elp_sleep(wl);
 937
 938 out:
 939         mutex_unlock(&wl->mutex);
 940
 941         return ret;
 942 }
 943
 944 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 945                                        struct ieee80211_vif *vif,
 946                                        struct ieee80211_bss_conf *bss_conf,
 947                                        u32 changed)
 948 {
 949         struct wl1251 *wl = hw->priv;
 950         struct sk_buff *beacon, *skb;
 951         int ret;
 952
 953         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 954
 955         mutex_lock(&wl->mutex);
 956
 957         ret = wl1251_ps_elp_wakeup(wl);
 958         if (ret < 0)
 959                 goto out;
 960
 961         if (changed & BSS_CHANGED_BSSID) {
 962                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 963
 964                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 965                 if (!skb)
 966                         goto out_sleep;
 967
 968                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 969                                               skb->data, skb->len);
 970                 dev_kfree_skb(skb);
 971                 if (ret < 0)
 972                         goto out_sleep;
 973
 974                 ret = wl1251_build_qos_null_data(wl);
 975                 if (ret < 0)
 976                         goto out;
 977
 978                 if (wl->bss_type != BSS_TYPE_IBSS) {
 979                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 980                                           wl->beacon_int, wl->dtim_period);
 981                         if (ret < 0)
 982                                 goto out_sleep;
 983                 }
 984         }
 985
 986         if (changed & BSS_CHANGED_ASSOC) {
 987                 if (bss_conf->assoc) {
 988                         wl->beacon_int = bss_conf->beacon_int;
 989
 990                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 991                         if (!skb)
 992                                 goto out_sleep;
 993
 994                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 995                                                       skb->data,
 996                                                       skb->len);
 997                         dev_kfree_skb(skb);
 998                         if (ret < 0)
 999                                 goto out_sleep;
1000
1001                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1002                         if (ret < 0)
1003                                 goto out_sleep;
1004                 } else {
1005                         /* use defaults when not associated */
1006                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1007                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1008                 }
1009         }
1010         if (changed & BSS_CHANGED_ERP_SLOT) {
1011                 if (bss_conf->use_short_slot)
1012                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1013                 else
1014                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1015                 if (ret < 0) {
1016                         wl1251_warning("Set slot time failed %d", ret);
1017                         goto out_sleep;
1018                 }
1019         }
1020
1021         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1022                 if (bss_conf->use_short_preamble)
1023                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1024                 else
1025                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1026         }
1027
1028         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1029                 if (bss_conf->use_cts_prot)
1030                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1031                 else
1032                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1033                 if (ret < 0) {
1034                         wl1251_warning("Set ctsprotect failed %d", ret);
1035                         goto out_sleep;
1036                 }
1037         }
1038
1039         if (changed & BSS_CHANGED_BEACON) {
1040                 beacon = ieee80211_beacon_get(hw, vif);
1041                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1042                                               beacon->len);
1043
1044                 if (ret < 0) {
1045                         dev_kfree_skb(beacon);
1046                         goto out_sleep;
1047                 }
1048
1049                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1050                                               beacon->len);
1051
1052                 dev_kfree_skb(beacon);
1053
1054                 if (ret < 0)
1055                         goto out_sleep;
1056
1057                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1058                                   wl->channel, wl->dtim_period);
1059
1060                 if (ret < 0)
1061                         goto out_sleep;
1062         }
1063
1064 out_sleep:
1065         wl1251_ps_elp_sleep(wl);
1066
1067 out:
1068         mutex_unlock(&wl->mutex);
1069 }
1070
1071
1072 /* can't be const, mac80211 writes to this */
1073 static struct ieee80211_rate wl1251_rates[] = {
1074         { .bitrate = 10,
1075           .hw_value = 0x1,
1076           .hw_value_short = 0x1, },
1077         { .bitrate = 20,
1078           .hw_value = 0x2,
1079           .hw_value_short = 0x2,
1080           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1081         { .bitrate = 55,
1082           .hw_value = 0x4,
1083           .hw_value_short = 0x4,
1084           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1085         { .bitrate = 110,
1086           .hw_value = 0x20,
1087           .hw_value_short = 0x20,
1088           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1089         { .bitrate = 60,
1090           .hw_value = 0x8,
1091           .hw_value_short = 0x8, },
1092         { .bitrate = 90,
1093           .hw_value = 0x10,
1094           .hw_value_short = 0x10, },
1095         { .bitrate = 120,
1096           .hw_value = 0x40,
1097           .hw_value_short = 0x40, },
1098         { .bitrate = 180,
1099           .hw_value = 0x80,
1100           .hw_value_short = 0x80, },
1101         { .bitrate = 240,
1102           .hw_value = 0x200,
1103           .hw_value_short = 0x200, },
1104         { .bitrate = 360,
1105          .hw_value = 0x400,
1106          .hw_value_short = 0x400, },
1107         { .bitrate = 480,
1108           .hw_value = 0x800,
1109           .hw_value_short = 0x800, },
1110         { .bitrate = 540,
1111           .hw_value = 0x1000,
1112           .hw_value_short = 0x1000, },
1113 };
1114
1115 /* can't be const, mac80211 writes to this */
1116 static struct ieee80211_channel wl1251_channels[] = {
1117         { .hw_value = 1, .center_freq = 2412},
1118         { .hw_value = 2, .center_freq = 2417},
1119         { .hw_value = 3, .center_freq = 2422},
1120         { .hw_value = 4, .center_freq = 2427},
1121         { .hw_value = 5, .center_freq = 2432},
1122         { .hw_value = 6, .center_freq = 2437},
1123         { .hw_value = 7, .center_freq = 2442},
1124         { .hw_value = 8, .center_freq = 2447},
1125         { .hw_value = 9, .center_freq = 2452},
1126         { .hw_value = 10, .center_freq = 2457},
1127         { .hw_value = 11, .center_freq = 2462},
1128         { .hw_value = 12, .center_freq = 2467},
1129         { .hw_value = 13, .center_freq = 2472},
1130 };
1131
1132 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1133                              const struct ieee80211_tx_queue_params *params)
1134 {
1135         enum wl1251_acx_ps_scheme ps_scheme;
1136         struct wl1251 *wl = hw->priv;
1137         int ret;
1138
1139         mutex_lock(&wl->mutex);
1140
1141         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1142
1143         ret = wl1251_ps_elp_wakeup(wl);
1144         if (ret < 0)
1145                 goto out;
1146
1147         /* mac80211 uses units of 32 usec */
1148         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1149                                 params->cw_min, params->cw_max,
1150                                 params->aifs, params->txop * 32);
1151         if (ret < 0)
1152                 goto out_sleep;
1153
1154         if (params->uapsd)
1155                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1156         else
1157                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1158
1159         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1160                                  CHANNEL_TYPE_EDCF,
1161                                  wl1251_tx_get_queue(queue), ps_scheme,
1162                                  WL1251_ACX_ACK_POLICY_LEGACY);
1163         if (ret < 0)
1164                 goto out_sleep;
1165
1166 out_sleep:
1167         wl1251_ps_elp_sleep(wl);
1168
1169 out:
1170         mutex_unlock(&wl->mutex);
1171
1172         return ret;
1173 }
1174
1175 /* can't be const, mac80211 writes to this */
1176 static struct ieee80211_supported_band wl1251_band_2ghz = {
1177         .channels = wl1251_channels,
1178         .n_channels = ARRAY_SIZE(wl1251_channels),
1179         .bitrates = wl1251_rates,
1180         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1181 };
1182
1183 static const struct ieee80211_ops wl1251_ops = {
1184         .start = wl1251_op_start,
1185         .stop = wl1251_op_stop,
1186         .add_interface = wl1251_op_add_interface,
1187         .remove_interface = wl1251_op_remove_interface,
1188         .config = wl1251_op_config,
1189         .configure_filter = wl1251_op_configure_filter,
1190         .tx = wl1251_op_tx,
1191         .set_key = wl1251_op_set_key,
1192         .hw_scan = wl1251_op_hw_scan,
1193         .bss_info_changed = wl1251_op_bss_info_changed,
1194         .set_rts_threshold = wl1251_op_set_rts_threshold,
1195         .conf_tx = wl1251_op_conf_tx,
1196 };
1197
1198 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1199 {
1200         unsigned long timeout;
1201
1202         wl1251_reg_write32(wl, EE_ADDR, offset);
1203         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1204
1205         /* EE_CTL_READ clears when data is ready */
1206         timeout = jiffies + msecs_to_jiffies(100);
1207         while (1) {
1208                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1209                         break;
1210
1211                 if (time_after(jiffies, timeout))
1212                         return -ETIMEDOUT;
1213
1214                 msleep(1);
1215         }
1216
1217         *data = wl1251_reg_read32(wl, EE_DATA);
1218         return 0;
1219 }
1220
1221 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1222                               u8 *data, size_t len)
1223 {
1224         size_t i;
1225         int ret;
1226
1227         wl1251_reg_write32(wl, EE_START, 0);
1228
1229         for (i = 0; i < len; i++) {
1230                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1231                 if (ret < 0)
1232                         return ret;
1233         }
1234
1235         return 0;
1236 }
1237
1238 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1239 {
1240         u8 mac[ETH_ALEN];
1241         int i, ret;
1242
1243         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1244
1245         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1246         if (ret < 0) {
1247                 wl1251_warning("failed to read MAC address from EEPROM");
1248                 return ret;
1249         }
1250
1251         /* MAC is stored in reverse order */
1252         for (i = 0; i < ETH_ALEN; i++)
1253                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1254
1255         return 0;
1256 }
1257
1258 static int wl1251_register_hw(struct wl1251 *wl)
1259 {
1260         int ret;
1261
1262         if (wl->mac80211_registered)
1263                 return 0;
1264
1265         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1266
1267         ret = ieee80211_register_hw(wl->hw);
1268         if (ret < 0) {
1269                 wl1251_error("unable to register mac80211 hw: %d", ret);
1270                 return ret;
1271         }
1272
1273         wl->mac80211_registered = true;
1274
1275         wl1251_notice("loaded");
1276
1277         return 0;
1278 }
1279
1280 int wl1251_init_ieee80211(struct wl1251 *wl)
1281 {
1282         int ret;
1283
1284         /* The tx descriptor buffer and the TKIP space */
1285         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1286                 + WL1251_TKIP_IV_SPACE;
1287
1288         /* unit us */
1289         /* FIXME: find a proper value */
1290         wl->hw->channel_change_time = 10000;
1291
1292         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1293                 IEEE80211_HW_SUPPORTS_PS |
1294                 IEEE80211_HW_BEACON_FILTER |
1295                 IEEE80211_HW_SUPPORTS_UAPSD;
1296
1297         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1298         wl->hw->wiphy->max_scan_ssids = 1;
1299         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1300
1301         wl->hw->queues = 4;
1302
1303         if (wl->use_eeprom)
1304                 wl1251_read_eeprom_mac(wl);
1305
1306         ret = wl1251_register_hw(wl);
1307         if (ret)
1308                 goto out;
1309
1310         wl1251_debugfs_init(wl);
1311         wl1251_notice("initialized");
1312
1313         ret = 0;
1314
1315 out:
1316         return ret;
1317 }
1318 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1319
1320 struct ieee80211_hw *wl1251_alloc_hw(void)
1321 {
1322         struct ieee80211_hw *hw;
1323         struct wl1251 *wl;
1324         int i;
1325         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1326
1327         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1328         if (!hw) {
1329                 wl1251_error("could not alloc ieee80211_hw");
1330                 return ERR_PTR(-ENOMEM);
1331         }
1332
1333         wl = hw->priv;
1334         memset(wl, 0, sizeof(*wl));
1335
1336         wl->hw = hw;
1337
1338         wl->data_in_count = 0;
1339
1340         skb_queue_head_init(&wl->tx_queue);
1341
1342         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1343         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1344         wl->channel = WL1251_DEFAULT_CHANNEL;
1345         wl->scanning = false;
1346         wl->default_key = 0;
1347         wl->listen_int = 1;
1348         wl->rx_counter = 0;
1349         wl->rx_handled = 0;
1350         wl->rx_current_buffer = 0;
1351         wl->rx_last_id = 0;
1352         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1353         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1354         wl->elp = false;
1355         wl->psm = 0;
1356         wl->psm_requested = false;
1357         wl->tx_queue_stopped = false;
1358         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1359         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1360         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1361         wl->vif = NULL;
1362
1363         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1364                 wl->tx_frames[i] = NULL;
1365
1366         wl->next_tx_complete = 0;
1367
1368         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1369         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1370
1371         /*
1372          * In case our MAC address is not correctly set,
1373          * we use a random but Nokia MAC.
1374          */
1375         memcpy(wl->mac_addr, nokia_oui, 3);
1376         get_random_bytes(wl->mac_addr + 3, 3);
1377
1378         wl->state = WL1251_STATE_OFF;
1379         mutex_init(&wl->mutex);
1380
1381         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1382         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1383
1384         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1385         if (!wl->rx_descriptor) {
1386                 wl1251_error("could not allocate memory for rx descriptor");
1387                 ieee80211_free_hw(hw);
1388                 return ERR_PTR(-ENOMEM);
1389         }
1390
1391         return hw;
1392 }
1393 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1394
1395 int wl1251_free_hw(struct wl1251 *wl)
1396 {
1397         ieee80211_unregister_hw(wl->hw);
1398
1399         wl1251_debugfs_exit(wl);
1400
1401         kfree(wl->target_mem_map);
1402         kfree(wl->data_path);
1403         vfree(wl->fw);
1404         wl->fw = NULL;
1405         kfree(wl->nvs);
1406         wl->nvs = NULL;
1407
1408         kfree(wl->rx_descriptor);
1409         wl->rx_descriptor = NULL;
1410
1411         ieee80211_free_hw(wl->hw);
1412
1413         return 0;
1414 }
1415 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1416
1417 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1418 MODULE_LICENSE("GPL");
1419 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1420 MODULE_FIRMWARE(WL1251_FW_NAME);