drivers/net/wireless/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "reg.h"
  35 #include "io.h"
  36 #include "cmd.h"
  37 #include "event.h"
  38 #include "tx.h"
  39 #include "rx.h"
  40 #include "ps.h"
  41 #include "init.h"
  42 #include "debugfs.h"
  43 #include "boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static int wl1251_power_off(struct wl1251 *wl)
  56 {
  57         return wl->if_ops->power(wl, false);
  58 }
  59
  60 static int wl1251_power_on(struct wl1251 *wl)
  61 {
  62         return wl->if_ops->power(wl, true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = vmalloc(wl->fw_len);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         ret = 0;
 134
 135 out:
 136         release_firmware(fw);
 137
 138         return ret;
 139 }
 140
 141 static void wl1251_fw_wakeup(struct wl1251 *wl)
 142 {
 143         u32 elp_reg;
 144
 145         elp_reg = ELPCTRL_WAKE_UP;
 146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 148
 149         if (!(elp_reg & ELPCTRL_WLAN_READY))
 150                 wl1251_warning("WLAN not ready");
 151 }
 152
 153 static int wl1251_chip_wakeup(struct wl1251 *wl)
 154 {
 155         int ret;
 156
 157         ret = wl1251_power_on(wl);
 158         if (ret < 0)
 159                 return ret;
 160
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         if (wl->nvs == NULL && !wl->use_eeprom) {
 205                 /* No NVS from netlink, try to get it from the filesystem */
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 100
 216 irqreturn_t wl1251_irq(int irq, void *cookie)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl = cookie;
 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_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 298                         wl1251_event_handle(wl, 0);
 299                 }
 300
 301                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 302                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 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                 while (skb_queue_len(&wl->tx_queue) > 0
 311                        && wl1251_tx_path_status(wl) == 0) {
 312
 313                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 314                         if (skb == NULL)
 315                                 goto out_sleep;
 316
 317                         ret = wl1251_tx_frame(wl, skb);
 318                         if (ret == -EBUSY) {
 319                                 skb_queue_head(&wl->tx_queue, skb);
 320                                 break;
 321                         } else if (ret < 0) {
 322                                 dev_kfree_skb(skb);
 323                         }
 324                 }
 325
 326                 if (--ctr == 0)
 327                         break;
 328
 329                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 330         } while (intr);
 331
 332 out_sleep:
 333         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 334         wl1251_ps_elp_sleep(wl);
 335
 336 out:
 337         mutex_unlock(&wl->mutex);
 338         return IRQ_HANDLED;
 339 }
 340 EXPORT_SYMBOL_GPL(wl1251_irq);
 341
 342 static void wl1251_irq_work(struct work_struct *work)
 343 {
 344         struct wl1251 *wl =
 345                 container_of(work, struct wl1251, irq_work);
 346
 347         wl1251_irq(0, wl);
 348 }
 349
 350 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 351                        u16 beacon_interval, u8 dtim_period)
 352 {
 353         int ret;
 354
 355         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 356                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 357                                      wl->tx_mgmt_frm_rate,
 358                                      wl->tx_mgmt_frm_mod);
 359         if (ret < 0)
 360                 goto out;
 361
 362         /*
 363          * Join command applies filters, and if we are not associated,
 364          * BSSID filter must be disabled for association to work.
 365          */
 366         if (is_zero_ether_addr(wl->bssid))
 367                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 368
 369         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 370                               dtim_period);
 371         if (ret < 0)
 372                 goto out;
 373
 374         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 375         if (ret < 0)
 376                 wl1251_warning("join timeout");
 377
 378 out:
 379         return ret;
 380 }
 381
 382 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 383 {
 384         struct wl1251 *wl = hw->priv;
 385         unsigned long flags;
 386
 387         skb_queue_tail(&wl->tx_queue, skb);
 388
 389         /*
 390          * The chip specific setup must run before the first TX packet -
 391          * before that, the tx_work will not be initialized!
 392          */
 393
 394         ieee80211_queue_work(wl->hw, &wl->tx_work);
 395
 396         /*
 397          * The workqueue is slow to process the tx_queue and we need stop
 398          * the queue here, otherwise the queue will get too long.
 399          */
 400         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 401                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 402
 403                 spin_lock_irqsave(&wl->wl_lock, flags);
 404                 ieee80211_stop_queues(wl->hw);
 405                 wl->tx_queue_stopped = true;
 406                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 407         }
 408 }
 409
 410 static int wl1251_op_start(struct ieee80211_hw *hw)
 411 {
 412         struct wl1251 *wl = hw->priv;
 413         struct wiphy *wiphy = hw->wiphy;
 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         /* update hw/fw version info in wiphy struct */
 448         wiphy->hw_version = wl->chip_id;
 449         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 450
 451 out:
 452         if (ret < 0)
 453                 wl1251_power_off(wl);
 454
 455         mutex_unlock(&wl->mutex);
 456
 457         return ret;
 458 }
 459
 460 static void wl1251_op_stop(struct ieee80211_hw *hw)
 461 {
 462         struct wl1251 *wl = hw->priv;
 463
 464         wl1251_info("down");
 465
 466         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 467
 468         mutex_lock(&wl->mutex);
 469
 470         WARN_ON(wl->state != WL1251_STATE_ON);
 471
 472         if (wl->scanning) {
 473                 ieee80211_scan_completed(wl->hw, true);
 474                 wl->scanning = false;
 475         }
 476
 477         wl->state = WL1251_STATE_OFF;
 478
 479         wl1251_disable_interrupts(wl);
 480
 481         mutex_unlock(&wl->mutex);
 482
 483         cancel_work_sync(&wl->irq_work);
 484         cancel_work_sync(&wl->tx_work);
 485         cancel_delayed_work_sync(&wl->ps_work);
 486         cancel_delayed_work_sync(&wl->elp_work);
 487
 488         mutex_lock(&wl->mutex);
 489
 490         /* let's notify MAC80211 about the remaining pending TX frames */
 491         wl1251_tx_flush(wl);
 492         wl1251_power_off(wl);
 493
 494         memset(wl->bssid, 0, ETH_ALEN);
 495         wl->listen_int = 1;
 496         wl->bss_type = MAX_BSS_TYPE;
 497
 498         wl->data_in_count = 0;
 499         wl->rx_counter = 0;
 500         wl->rx_handled = 0;
 501         wl->rx_current_buffer = 0;
 502         wl->rx_last_id = 0;
 503         wl->next_tx_complete = 0;
 504         wl->elp = false;
 505         wl->station_mode = STATION_ACTIVE_MODE;
 506         wl->tx_queue_stopped = false;
 507         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 508         wl->rssi_thold = 0;
 509         wl->channel = WL1251_DEFAULT_CHANNEL;
 510         wl->monitor_present = false;
 511
 512         wl1251_debugfs_reset(wl);
 513
 514         mutex_unlock(&wl->mutex);
 515 }
 516
 517 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 518                                    struct ieee80211_vif *vif)
 519 {
 520         struct wl1251 *wl = hw->priv;
 521         int ret = 0;
 522
 523         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 524                      vif->type, vif->addr);
 525
 526         mutex_lock(&wl->mutex);
 527         if (wl->vif) {
 528                 ret = -EBUSY;
 529                 goto out;
 530         }
 531
 532         wl->vif = vif;
 533
 534         switch (vif->type) {
 535         case NL80211_IFTYPE_STATION:
 536                 wl->bss_type = BSS_TYPE_STA_BSS;
 537                 break;
 538         case NL80211_IFTYPE_ADHOC:
 539                 wl->bss_type = BSS_TYPE_IBSS;
 540                 break;
 541         default:
 542                 ret = -EOPNOTSUPP;
 543                 goto out;
 544         }
 545
 546         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 547                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 548                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 549                 ret = wl1251_acx_station_id(wl);
 550                 if (ret < 0)
 551                         goto out;
 552         }
 553
 554 out:
 555         mutex_unlock(&wl->mutex);
 556         return ret;
 557 }
 558
 559 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 560                                          struct ieee80211_vif *vif)
 561 {
 562         struct wl1251 *wl = hw->priv;
 563
 564         mutex_lock(&wl->mutex);
 565         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 566         wl->vif = NULL;
 567         mutex_unlock(&wl->mutex);
 568 }
 569
 570 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 571 {
 572         struct ieee80211_qos_hdr template;
 573
 574         memset(&template, 0, sizeof(template));
 575
 576         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 577         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 578         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 579
 580         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 581                                              IEEE80211_STYPE_QOS_NULLFUNC |
 582                                              IEEE80211_FCTL_TODS);
 583
 584         /* FIXME: not sure what priority to use here */
 585         template.qos_ctrl = cpu_to_le16(0);
 586
 587         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 588                                        sizeof(template));
 589 }
 590
 591 static void wl1251_ps_work(struct work_struct *work)
 592 {
 593         struct delayed_work *dwork;
 594         struct wl1251 *wl;
 595         unsigned long diff, wait;
 596         bool need_ps;
 597         bool have_ps;
 598         int ret;
 599         int i;
 600
 601         dwork = container_of(work, struct delayed_work, work);
 602         wl = container_of(dwork, struct wl1251, ps_work);
 603
 604         mutex_lock(&wl->mutex);
 605
 606         /* don't change PS modes while still transitioning, to avoid possbile
 607          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 608         if (wl->ps_transitioning) {
 609                 diff = jiffies - wl->ps_change_jiffies;
 610                 if (diff > msecs_to_jiffies(500)) {
 611                         wl1251_error("PS change taking too long: %lu", diff);
 612                         wl->ps_transitioning = false;
 613                 } else {
 614                         //wl1251_error("PS still transitioning");
 615                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 616                                 msecs_to_jiffies(50));
 617                         goto out;
 618                 }
 619         }
 620
 621         need_ps = wl->psm_requested && !wl->bss_lost;
 622         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 623
 624         if (need_ps == have_ps) {
 625                 //wl1251_info("ps: already in mode %d", have_ps);
 626                 goto out;
 627         }
 628
 629         /* don't enter PS if there was recent activity */
 630         if (need_ps) {
 631                 wait = 0;
 632
 633                 diff = jiffies - wl->last_io_jiffies;
 634                 if (diff < msecs_to_jiffies(150)) {
 635                         //wl1251_info("ps: postponed psm, j %ld", diff);
 636                         wait = msecs_to_jiffies(150) - diff + 1;
 637                 }
 638
 639                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 640                         if (wl->tx_frames[i] != NULL) {
 641                                 //wl1251_error("  frm %d busy", i);
 642                                 if (wait < msecs_to_jiffies(50))
 643                                         wait = msecs_to_jiffies(50);
 644                                 break;
 645                         }
 646                 }
 647
 648                 if (wait > 0) {
 649                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 650                         goto out;
 651                 }
 652         }
 653
 654         ret = wl1251_ps_elp_wakeup(wl);
 655         if (ret < 0)
 656                 goto out;
 657
 658         if (need_ps) {
 659                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 660                                             wl->dtim_period);
 661         }
 662         ret = wl1251_ps_set_mode(wl,
 663                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 664         if (ret < 0)
 665                 goto out_sleep;
 666
 667         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 668         //      jiffies - wl->last_io_jiffies);
 669
 670 out_sleep:
 671         wl1251_ps_elp_sleep(wl);
 672
 673 out:
 674         mutex_unlock(&wl->mutex);
 675 }
 676
 677 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 678 {
 679         struct wl1251 *wl = hw->priv;
 680         struct ieee80211_conf *conf = &hw->conf;
 681         int channel, ret = 0;
 682
 683         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 684
 685         wl1251_debug(DEBUG_MAC80211,
 686                      "mac80211 config ch %d monitor %s psm %s power %d",
 687                      channel,
 688                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 689                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 690                      conf->power_level);
 691
 692         mutex_lock(&wl->mutex);
 693
 694         ret = wl1251_ps_elp_wakeup(wl);
 695         if (ret < 0)
 696                 goto out;
 697
 698         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 699                 u32 mode;
 700
 701                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 702                         wl->monitor_present = true;
 703                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 704                 } else {
 705                         wl->monitor_present = false;
 706                         mode = 0;
 707                 }
 708
 709                 ret = wl1251_acx_feature_cfg(wl, mode);
 710                 if (ret < 0)
 711                         goto out_sleep;
 712         }
 713
 714         if (channel != wl->channel) {
 715                 wl->channel = channel;
 716
 717                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 718                                   wl->beacon_int, wl->dtim_period);
 719                 if (ret < 0)
 720                         goto out_sleep;
 721         }
 722
 723         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 724                 wl1251_debug(DEBUG_PSM, "psm enabled");
 725
 726                 wl->psm_requested = true;
 727
 728                 wl->dtim_period = conf->ps_dtim_period;
 729
 730                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 731         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 732                    wl->psm_requested) {
 733                 wl1251_debug(DEBUG_PSM, "psm disabled");
 734
 735                 wl->psm_requested = false;
 736
 737                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 738         }
 739
 740         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 741                 if (conf->flags & IEEE80211_CONF_IDLE) {
 742                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 743                         if (ret < 0)
 744                                 goto out_sleep;
 745                 } else {
 746                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 747                         if (ret < 0)
 748                                 goto out_sleep;
 749
 750                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 751                         if (ret < 0)
 752                                 wl1251_error("error waiting for wakeup");
 753
 754                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 755                                           wl->beacon_int, wl->dtim_period);
 756                         if (ret < 0)
 757                                 goto out_sleep;
 758                 }
 759         }
 760
 761         if (conf->power_level != wl->power_level) {
 762                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 763                 if (ret < 0)
 764                         goto out_sleep;
 765
 766                 wl->power_level = conf->power_level;
 767         }
 768
 769 out_sleep:
 770         wl1251_ps_elp_sleep(wl);
 771
 772 out:
 773         mutex_unlock(&wl->mutex);
 774
 775         return ret;
 776 }
 777
 778 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 779                                   FIF_ALLMULTI | \
 780                                   FIF_FCSFAIL | \
 781                                   FIF_BCN_PRBRESP_PROMISC | \
 782                                   FIF_CONTROL | \
 783                                   FIF_OTHER_BSS | \
 784                                   FIF_PROBE_REQ)
 785
 786 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 787                                        unsigned int changed,
 788                                        unsigned int *total,u64 multicast)
 789 {
 790         struct wl1251 *wl = hw->priv;
 791         int ret;
 792
 793         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 794
 795         *total &= WL1251_SUPPORTED_FILTERS;
 796         changed &= WL1251_SUPPORTED_FILTERS;
 797
 798         if (changed == 0)
 799                 /* no filters which we support changed */
 800                 return;
 801
 802         mutex_lock(&wl->mutex);
 803
 804         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 805         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 806
 807         if (*total & FIF_PROMISC_IN_BSS) {
 808                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 809                 wl->rx_config |= CFG_RX_ALL_GOOD;
 810         }
 811         if (*total & FIF_ALLMULTI)
 812                 /*
 813                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 814                  * all multicast frames
 815                  */
 816                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 817         if (*total & FIF_FCSFAIL)
 818                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 819         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 820                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 821                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 822         }
 823         if (*total & FIF_CONTROL)
 824                 wl->rx_filter |= CFG_RX_CTL_EN;
 825         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 826                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 827         if (*total & FIF_PROBE_REQ)
 828                 wl->rx_filter |= CFG_RX_PREQ_EN;
 829
 830         if (wl->state == WL1251_STATE_OFF)
 831                 goto out;
 832
 833         ret = wl1251_ps_elp_wakeup(wl);
 834         if (ret < 0)
 835                 goto out;
 836
 837         /* send filters to firmware */
 838         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 839
 840         wl1251_ps_elp_sleep(wl);
 841
 842 out:
 843         mutex_unlock(&wl->mutex);
 844 }
 845
 846 /* HW encryption */
 847 static int wl1251_set_key_type(struct wl1251 *wl,
 848                                struct wl1251_cmd_set_keys *key,
 849                                enum set_key_cmd cmd,
 850                                struct ieee80211_key_conf *mac80211_key,
 851                                const u8 *addr)
 852 {
 853         switch (mac80211_key->cipher) {
 854         case WLAN_CIPHER_SUITE_WEP40:
 855         case WLAN_CIPHER_SUITE_WEP104:
 856                 if (is_broadcast_ether_addr(addr))
 857                         key->key_type = KEY_WEP_DEFAULT;
 858                 else
 859                         key->key_type = KEY_WEP_ADDR;
 860
 861                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 862                 break;
 863         case WLAN_CIPHER_SUITE_TKIP:
 864                 if (is_broadcast_ether_addr(addr))
 865                         key->key_type = KEY_TKIP_MIC_GROUP;
 866                 else
 867                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 868
 869                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 870                 break;
 871         case WLAN_CIPHER_SUITE_CCMP:
 872                 if (is_broadcast_ether_addr(addr))
 873                         key->key_type = KEY_AES_GROUP;
 874                 else
 875                         key->key_type = KEY_AES_PAIRWISE;
 876                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 877                 break;
 878         default:
 879                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 880                 return -EOPNOTSUPP;
 881         }
 882
 883         return 0;
 884 }
 885
 886 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 887                              struct ieee80211_vif *vif,
 888                              struct ieee80211_sta *sta,
 889                              struct ieee80211_key_conf *key)
 890 {
 891         struct wl1251 *wl = hw->priv;
 892         struct wl1251_cmd_set_keys *wl_cmd;
 893         const u8 *addr;
 894         int ret;
 895
 896         static const u8 bcast_addr[ETH_ALEN] =
 897                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 898
 899         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 900
 901         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 902         if (!wl_cmd) {
 903                 ret = -ENOMEM;
 904                 goto out;
 905         }
 906
 907         addr = sta ? sta->addr : bcast_addr;
 908
 909         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 910         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 911         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 912                      key->cipher, key->keyidx, key->keylen, key->flags);
 913         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 914
 915         if (is_zero_ether_addr(addr)) {
 916                 /* We dont support TX only encryption */
 917                 ret = -EOPNOTSUPP;
 918                 goto out;
 919         }
 920
 921         mutex_lock(&wl->mutex);
 922
 923         switch (cmd) {
 924         case SET_KEY:
 925                 if (wl->monitor_present) {
 926                         ret = -EOPNOTSUPP;
 927                         goto out_unlock;
 928                 }
 929                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 930                 break;
 931         case DISABLE_KEY:
 932                 wl_cmd->key_action = KEY_REMOVE;
 933                 break;
 934         default:
 935                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 936                 break;
 937         }
 938
 939         ret = wl1251_ps_elp_wakeup(wl);
 940         if (ret < 0)
 941                 goto out_unlock;
 942
 943         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 944         if (ret < 0) {
 945                 wl1251_error("Set KEY type failed");
 946                 goto out_sleep;
 947         }
 948
 949         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 950                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 951
 952         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 953             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 954                 /*
 955                  * We get the key in the following form:
 956                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 957                  * but the target is expecting:
 958                  * TKIP - RX MIC - TX MIC
 959                  */
 960                 memcpy(wl_cmd->key, key->key, 16);
 961                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 962                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 963
 964         } else {
 965                 memcpy(wl_cmd->key, key->key, key->keylen);
 966         }
 967         wl_cmd->key_size = key->keylen;
 968
 969         wl_cmd->id = key->keyidx;
 970         wl_cmd->ssid_profile = 0;
 971
 972         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 973
 974         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 975         if (ret < 0) {
 976                 wl1251_warning("could not set keys");
 977                 goto out_sleep;
 978         }
 979
 980 out_sleep:
 981         wl1251_ps_elp_sleep(wl);
 982
 983 out_unlock:
 984         mutex_unlock(&wl->mutex);
 985
 986 out:
 987         kfree(wl_cmd);
 988
 989         return ret;
 990 }
 991
 992 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 993                              struct ieee80211_vif *vif,
 994                              struct cfg80211_scan_request *req)
 995 {
 996         struct wl1251 *wl = hw->priv;
 997         struct sk_buff *skb;
 998         size_t ssid_len = 0;
 999         u8 *ssid = NULL;
1000         int ret;
1001
1002         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1003
1004         if (req->n_ssids) {
1005                 ssid = req->ssids[0].ssid;
1006                 ssid_len = req->ssids[0].ssid_len;
1007         }
1008
1009         mutex_lock(&wl->mutex);
1010
1011         if (wl->scanning) {
1012                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1013                 ret = -EINVAL;
1014                 goto out;
1015         }
1016
1017         ret = wl1251_ps_elp_wakeup(wl);
1018         if (ret < 0)
1019                 goto out;
1020
1021         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1022                                      req->ie, req->ie_len);
1023         if (!skb) {
1024                 ret = -ENOMEM;
1025                 goto out;
1026         }
1027
1028         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1029                                       skb->len);
1030         dev_kfree_skb(skb);
1031         if (ret < 0)
1032                 goto out_sleep;
1033
1034         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1035         if (ret < 0)
1036                 goto out_sleep;
1037
1038         wl->scanning = true;
1039
1040         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1041                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1042         if (ret < 0) {
1043                 wl->scanning = false;
1044                 goto out_sleep;
1045         }
1046
1047 out_sleep:
1048         wl1251_ps_elp_sleep(wl);
1049
1050 out:
1051         mutex_unlock(&wl->mutex);
1052
1053         return ret;
1054 }
1055
1056 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1057 {
1058         struct wl1251 *wl = hw->priv;
1059         int ret;
1060
1061         mutex_lock(&wl->mutex);
1062
1063         ret = wl1251_ps_elp_wakeup(wl);
1064         if (ret < 0)
1065                 goto out;
1066
1067         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1068         if (ret < 0)
1069                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1070
1071         wl1251_ps_elp_sleep(wl);
1072
1073 out:
1074         mutex_unlock(&wl->mutex);
1075
1076         return ret;
1077 }
1078
1079 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1080                                        struct ieee80211_vif *vif,
1081                                        struct ieee80211_bss_conf *bss_conf,
1082                                        u32 changed)
1083 {
1084         struct wl1251 *wl = hw->priv;
1085         struct sk_buff *beacon, *skb;
1086         bool enable;
1087         int ret;
1088
1089         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1090
1091         mutex_lock(&wl->mutex);
1092
1093         ret = wl1251_ps_elp_wakeup(wl);
1094         if (ret < 0)
1095                 goto out;
1096
1097         if (changed & BSS_CHANGED_CQM) {
1098                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1099                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1100                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1101                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1102                 if (ret < 0)
1103                         goto out;
1104                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1105         }
1106
1107         if (changed & BSS_CHANGED_BSSID) {
1108                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1109
1110                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1111                 if (!skb)
1112                         goto out_sleep;
1113
1114                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1115                                               skb->data, skb->len);
1116                 dev_kfree_skb(skb);
1117                 if (ret < 0)
1118                         goto out_sleep;
1119
1120                 ret = wl1251_build_qos_null_data(wl);
1121                 if (ret < 0)
1122                         goto out;
1123
1124                 if (wl->bss_type != BSS_TYPE_IBSS) {
1125                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1126                                           wl->beacon_int, wl->dtim_period);
1127                         if (ret < 0)
1128                                 goto out_sleep;
1129                 }
1130         }
1131
1132         if (changed & BSS_CHANGED_ASSOC) {
1133                 if (bss_conf->assoc) {
1134                         wl->beacon_int = bss_conf->beacon_int;
1135
1136                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1137                         if (!skb)
1138                                 goto out_sleep;
1139
1140                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1141                                                       skb->data,
1142                                                       skb->len);
1143                         dev_kfree_skb(skb);
1144                         if (ret < 0)
1145                                 goto out_sleep;
1146
1147                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1148                         if (ret < 0)
1149                                 goto out_sleep;
1150                 } else {
1151                         /* use defaults when not associated */
1152                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1153                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1154                 }
1155         }
1156         if (changed & BSS_CHANGED_ERP_SLOT) {
1157                 if (bss_conf->use_short_slot)
1158                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1159                 else
1160                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1161                 if (ret < 0) {
1162                         wl1251_warning("Set slot time failed %d", ret);
1163                         goto out_sleep;
1164                 }
1165         }
1166
1167         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1168                 if (bss_conf->use_short_preamble)
1169                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1170                 else
1171                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1172         }
1173
1174         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1175                 if (bss_conf->use_cts_prot)
1176                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1177                 else
1178                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1179                 if (ret < 0) {
1180                         wl1251_warning("Set ctsprotect failed %d", ret);
1181                         goto out_sleep;
1182                 }
1183         }
1184
1185         if (changed & BSS_CHANGED_ARP_FILTER) {
1186                 __be32 addr = bss_conf->arp_addr_list[0];
1187                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1188
1189                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1190                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1191
1192                 if (ret < 0)
1193                         goto out_sleep;
1194         }
1195
1196         if (changed & BSS_CHANGED_BEACON) {
1197                 beacon = ieee80211_beacon_get(hw, vif);
1198                 if (!beacon)
1199                         goto out_sleep;
1200
1201                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1202                                               beacon->len);
1203
1204                 if (ret < 0) {
1205                         dev_kfree_skb(beacon);
1206                         goto out_sleep;
1207                 }
1208
1209                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1210                                               beacon->len);
1211
1212                 dev_kfree_skb(beacon);
1213
1214                 if (ret < 0)
1215                         goto out_sleep;
1216
1217                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1218                                   wl->channel, wl->dtim_period);
1219
1220                 if (ret < 0)
1221                         goto out_sleep;
1222         }
1223
1224 out_sleep:
1225         wl1251_ps_elp_sleep(wl);
1226
1227 out:
1228         mutex_unlock(&wl->mutex);
1229 }
1230
1231
1232 /* can't be const, mac80211 writes to this */
1233 static struct ieee80211_rate wl1251_rates[] = {
1234         { .bitrate = 10,
1235           .hw_value = 0x1,
1236           .hw_value_short = 0x1, },
1237         { .bitrate = 20,
1238           .hw_value = 0x2,
1239           .hw_value_short = 0x2,
1240           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1241         { .bitrate = 55,
1242           .hw_value = 0x4,
1243           .hw_value_short = 0x4,
1244           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1245         { .bitrate = 110,
1246           .hw_value = 0x20,
1247           .hw_value_short = 0x20,
1248           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1249         { .bitrate = 60,
1250           .hw_value = 0x8,
1251           .hw_value_short = 0x8, },
1252         { .bitrate = 90,
1253           .hw_value = 0x10,
1254           .hw_value_short = 0x10, },
1255         { .bitrate = 120,
1256           .hw_value = 0x40,
1257           .hw_value_short = 0x40, },
1258         { .bitrate = 180,
1259           .hw_value = 0x80,
1260           .hw_value_short = 0x80, },
1261         { .bitrate = 240,
1262           .hw_value = 0x200,
1263           .hw_value_short = 0x200, },
1264         { .bitrate = 360,
1265          .hw_value = 0x400,
1266          .hw_value_short = 0x400, },
1267         { .bitrate = 480,
1268           .hw_value = 0x800,
1269           .hw_value_short = 0x800, },
1270         { .bitrate = 540,
1271           .hw_value = 0x1000,
1272           .hw_value_short = 0x1000, },
1273 };
1274
1275 /* can't be const, mac80211 writes to this */
1276 static struct ieee80211_channel wl1251_channels[] = {
1277         { .hw_value = 1, .center_freq = 2412},
1278         { .hw_value = 2, .center_freq = 2417},
1279         { .hw_value = 3, .center_freq = 2422},
1280         { .hw_value = 4, .center_freq = 2427},
1281         { .hw_value = 5, .center_freq = 2432},
1282         { .hw_value = 6, .center_freq = 2437},
1283         { .hw_value = 7, .center_freq = 2442},
1284         { .hw_value = 8, .center_freq = 2447},
1285         { .hw_value = 9, .center_freq = 2452},
1286         { .hw_value = 10, .center_freq = 2457},
1287         { .hw_value = 11, .center_freq = 2462},
1288         { .hw_value = 12, .center_freq = 2467},
1289         { .hw_value = 13, .center_freq = 2472},
1290 };
1291
1292 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1293                              struct ieee80211_vif *vif, u16 queue,
1294                              const struct ieee80211_tx_queue_params *params)
1295 {
1296         enum wl1251_acx_ps_scheme ps_scheme;
1297         struct wl1251 *wl = hw->priv;
1298         int ret;
1299
1300         mutex_lock(&wl->mutex);
1301
1302         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1303
1304         ret = wl1251_ps_elp_wakeup(wl);
1305         if (ret < 0)
1306                 goto out;
1307
1308         /* mac80211 uses units of 32 usec */
1309         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1310                                 params->cw_min, params->cw_max,
1311                                 params->aifs, params->txop * 32);
1312         if (ret < 0)
1313                 goto out_sleep;
1314
1315         if (params->uapsd)
1316                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1317         else
1318                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1319
1320         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1321                                  CHANNEL_TYPE_EDCF,
1322                                  wl1251_tx_get_queue(queue), ps_scheme,
1323                                  WL1251_ACX_ACK_POLICY_LEGACY);
1324         if (ret < 0)
1325                 goto out_sleep;
1326
1327 out_sleep:
1328         wl1251_ps_elp_sleep(wl);
1329
1330 out:
1331         mutex_unlock(&wl->mutex);
1332
1333         return ret;
1334 }
1335
1336 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1337                                 struct survey_info *survey)
1338 {
1339         struct wl1251 *wl = hw->priv;
1340         struct ieee80211_conf *conf = &hw->conf;
1341
1342         if (idx != 0)
1343                 return -ENOENT;
1344
1345         survey->channel = conf->channel;
1346         survey->filled = SURVEY_INFO_NOISE_DBM;
1347         survey->noise = wl->noise;
1348
1349         return 0;
1350 }
1351
1352 /* can't be const, mac80211 writes to this */
1353 static struct ieee80211_supported_band wl1251_band_2ghz = {
1354         .channels = wl1251_channels,
1355         .n_channels = ARRAY_SIZE(wl1251_channels),
1356         .bitrates = wl1251_rates,
1357         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1358 };
1359
1360 static const struct ieee80211_ops wl1251_ops = {
1361         .start = wl1251_op_start,
1362         .stop = wl1251_op_stop,
1363         .add_interface = wl1251_op_add_interface,
1364         .remove_interface = wl1251_op_remove_interface,
1365         .config = wl1251_op_config,
1366         .configure_filter = wl1251_op_configure_filter,
1367         .tx = wl1251_op_tx,
1368         .set_key = wl1251_op_set_key,
1369         .hw_scan = wl1251_op_hw_scan,
1370         .bss_info_changed = wl1251_op_bss_info_changed,
1371         .set_rts_threshold = wl1251_op_set_rts_threshold,
1372         .conf_tx = wl1251_op_conf_tx,
1373         .get_survey = wl1251_op_get_survey,
1374 };
1375
1376 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1377 {
1378         unsigned long timeout;
1379
1380         wl1251_reg_write32(wl, EE_ADDR, offset);
1381         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1382
1383         /* EE_CTL_READ clears when data is ready */
1384         timeout = jiffies + msecs_to_jiffies(100);
1385         while (1) {
1386                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1387                         break;
1388
1389                 if (time_after(jiffies, timeout))
1390                         return -ETIMEDOUT;
1391
1392                 msleep(1);
1393         }
1394
1395         *data = wl1251_reg_read32(wl, EE_DATA);
1396         return 0;
1397 }
1398
1399 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1400                               u8 *data, size_t len)
1401 {
1402         size_t i;
1403         int ret;
1404
1405         wl1251_reg_write32(wl, EE_START, 0);
1406
1407         for (i = 0; i < len; i++) {
1408                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1409                 if (ret < 0)
1410                         return ret;
1411         }
1412
1413         return 0;
1414 }
1415
1416 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1417 {
1418         u8 mac[ETH_ALEN];
1419         int i, ret;
1420
1421         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1422
1423         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1424         if (ret < 0) {
1425                 wl1251_warning("failed to read MAC address from EEPROM");
1426                 return ret;
1427         }
1428
1429         /* MAC is stored in reverse order */
1430         for (i = 0; i < ETH_ALEN; i++)
1431                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1432
1433         return 0;
1434 }
1435
1436 /* temporary (?) hack for EEPROM dumping
1437  * (it seems this can only be done before fw is running) */
1438 static int wl1251_dump_eeprom(struct wl1251 *wl)
1439 {
1440         int ret;
1441
1442         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1443
1444         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1445         if (wl->eeprom_dump == NULL) {
1446                 ret = -ENOMEM;
1447                 goto out;
1448         }
1449
1450         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1451         if (ret != 0) {
1452                 wl1251_error("eeprom dump failed: %d", ret);
1453                 kfree(wl->eeprom_dump);
1454                 wl->eeprom_dump = NULL;
1455                 goto out;
1456         }
1457
1458         wl1251_info("eeprom dumped.");
1459
1460 out:
1461         return ret;
1462 }
1463
1464 static int wl1251_register_hw(struct wl1251 *wl)
1465 {
1466         int ret;
1467
1468         if (wl->mac80211_registered)
1469                 return 0;
1470
1471         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1472
1473         ret = ieee80211_register_hw(wl->hw);
1474         if (ret < 0) {
1475                 wl1251_error("unable to register mac80211 hw: %d", ret);
1476                 return ret;
1477         }
1478
1479         wl->mac80211_registered = true;
1480
1481         wl1251_notice("loaded");
1482
1483         return 0;
1484 }
1485
1486 int wl1251_init_ieee80211(struct wl1251 *wl)
1487 {
1488         int ret;
1489
1490         /* The tx descriptor buffer and the TKIP space */
1491         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1492                 + WL1251_TKIP_IV_SPACE;
1493
1494         /* unit us */
1495         /* FIXME: find a proper value */
1496         wl->hw->channel_change_time = 10000;
1497
1498         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1499                 IEEE80211_HW_SUPPORTS_PS |
1500                 IEEE80211_HW_BEACON_FILTER |
1501                 IEEE80211_HW_SUPPORTS_UAPSD |
1502                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1503
1504         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1505                                          BIT(NL80211_IFTYPE_ADHOC);
1506         wl->hw->wiphy->max_scan_ssids = 1;
1507         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1508
1509         wl->hw->queues = 4;
1510
1511         if (wl->use_eeprom)
1512                 wl1251_read_eeprom_mac(wl);
1513         if (wl->dump_eeprom)
1514                 wl1251_dump_eeprom(wl);
1515
1516         ret = wl1251_register_hw(wl);
1517         if (ret)
1518                 goto out;
1519
1520         wl1251_debugfs_init(wl);
1521         wl1251_notice("initialized");
1522
1523         ret = 0;
1524
1525 out:
1526         return ret;
1527 }
1528 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1529
1530 struct ieee80211_hw *wl1251_alloc_hw(void)
1531 {
1532         struct ieee80211_hw *hw;
1533         struct wl1251 *wl;
1534         int i;
1535         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1536
1537         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1538         if (!hw) {
1539                 wl1251_error("could not alloc ieee80211_hw");
1540                 return ERR_PTR(-ENOMEM);
1541         }
1542
1543         wl = hw->priv;
1544         memset(wl, 0, sizeof(*wl));
1545
1546         wl->hw = hw;
1547
1548         wl->data_in_count = 0;
1549
1550         skb_queue_head_init(&wl->tx_queue);
1551
1552         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1553         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1554         wl->channel = WL1251_DEFAULT_CHANNEL;
1555         wl->monitor_present = false;
1556         wl->scanning = false;
1557         wl->default_key = 0;
1558         wl->listen_int = 1;
1559         wl->rx_counter = 0;
1560         wl->rx_handled = 0;
1561         wl->rx_current_buffer = 0;
1562         wl->rx_last_id = 0;
1563         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1564         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1565         wl->elp = false;
1566         wl->station_mode = STATION_ACTIVE_MODE;
1567         wl->psm_requested = false;
1568         wl->tx_queue_stopped = false;
1569         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1570         wl->rssi_thold = 0;
1571         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1572         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1573         wl->vif = NULL;
1574
1575         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1576                 wl->tx_frames[i] = NULL;
1577
1578         wl->next_tx_complete = 0;
1579
1580         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1581         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1582
1583         /*
1584          * In case our MAC address is not correctly set,
1585          * we use a random but Nokia MAC.
1586          */
1587         memcpy(wl->mac_addr, nokia_oui, 3);
1588         get_random_bytes(wl->mac_addr + 3, 3);
1589
1590         wl->state = WL1251_STATE_OFF;
1591         mutex_init(&wl->mutex);
1592
1593         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1594         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1595
1596         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1597         if (!wl->rx_descriptor) {
1598                 wl1251_error("could not allocate memory for rx descriptor");
1599                 ieee80211_free_hw(hw);
1600                 return ERR_PTR(-ENOMEM);
1601         }
1602
1603         return hw;
1604 }
1605 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1606
1607 int wl1251_free_hw(struct wl1251 *wl)
1608 {
1609         ieee80211_unregister_hw(wl->hw);
1610
1611         wl1251_debugfs_exit(wl);
1612
1613         kfree(wl->target_mem_map);
1614         kfree(wl->data_path);
1615         vfree(wl->fw);
1616         wl->fw = NULL;
1617         kfree(wl->nvs);
1618         wl->nvs = NULL;
1619
1620         kfree(wl->rx_descriptor);
1621         wl->rx_descriptor = NULL;
1622
1623         ieee80211_free_hw(wl->hw);
1624
1625         if (wl->eeprom_dump != NULL)
1626                 kfree(wl->eeprom_dump);
1627
1628         return 0;
1629 }
1630 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1631
1632 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1633 MODULE_LICENSE("GPL");
1634 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1635 MODULE_FIRMWARE(WL1251_FW_NAME);