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 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 100
 217 irqreturn_t wl1251_irq(int irq, void *cookie)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl = cookie;
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 while (skb_queue_len(&wl->tx_queue) > 0
 312                        && wl1251_tx_path_status(wl) == 0) {
 313
 314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 315                         if (skb == NULL)
 316                                 goto out_sleep;
 317
 318                         ret = wl1251_tx_frame(wl, skb);
 319                         if (ret == -EBUSY) {
 320                                 skb_queue_head(&wl->tx_queue, skb);
 321                                 break;
 322                         } else if (ret < 0) {
 323                                 dev_kfree_skb(skb);
 324                         }
 325                 }
 326
 327                 if (--ctr == 0)
 328                         break;
 329
 330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 331         } while (intr);
 332
 333 out_sleep:
 334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 335         wl1251_ps_elp_sleep(wl);
 336
 337 out:
 338         mutex_unlock(&wl->mutex);
 339         return IRQ_HANDLED;
 340 }
 341 EXPORT_SYMBOL_GPL(wl1251_irq);
 342
 343 static void wl1251_irq_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, irq_work);
 347
 348         wl1251_irq(0, wl);
 349 }
 350
 351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 352                        u16 beacon_interval, u8 dtim_period)
 353 {
 354         int ret;
 355
 356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 358                                      wl->tx_mgmt_frm_rate,
 359                                      wl->tx_mgmt_frm_mod);
 360         if (ret < 0)
 361                 goto out;
 362
 363         /*
 364          * Join command applies filters, and if we are not associated,
 365          * BSSID filter must be disabled for association to work.
 366          */
 367         if (is_zero_ether_addr(wl->bssid))
 368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 369
 370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 371                               dtim_period);
 372         if (ret < 0)
 373                 goto out;
 374
 375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 376         if (ret < 0)
 377                 wl1251_warning("join timeout");
 378
 379 out:
 380         return ret;
 381 }
 382
 383 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386         unsigned long flags;
 387
 388         skb_queue_tail(&wl->tx_queue, skb);
 389
 390         /*
 391          * The chip specific setup must run before the first TX packet -
 392          * before that, the tx_work will not be initialized!
 393          */
 394
 395         ieee80211_queue_work(wl->hw, &wl->tx_work);
 396
 397         /*
 398          * The workqueue is slow to process the tx_queue and we need stop
 399          * the queue here, otherwise the queue will get too long.
 400          */
 401         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 402                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 403
 404                 spin_lock_irqsave(&wl->wl_lock, flags);
 405                 ieee80211_stop_queues(wl->hw);
 406                 wl->tx_queue_stopped = true;
 407                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 408         }
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         struct wiphy *wiphy = hw->wiphy;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448         /* update hw/fw version info in wiphy struct */
 449         wiphy->hw_version = wl->chip_id;
 450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 451
 452 out:
 453         if (ret < 0)
 454                 wl1251_power_off(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         return ret;
 459 }
 460
 461 static void wl1251_op_stop(struct ieee80211_hw *hw)
 462 {
 463         struct wl1251 *wl = hw->priv;
 464
 465         wl1251_info("down");
 466
 467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 468
 469         mutex_lock(&wl->mutex);
 470
 471         WARN_ON(wl->state != WL1251_STATE_ON);
 472
 473         if (wl->scanning) {
 474                 ieee80211_scan_completed(wl->hw, true);
 475                 wl->scanning = false;
 476         }
 477
 478         wl->state = WL1251_STATE_OFF;
 479
 480         wl1251_disable_interrupts(wl);
 481
 482         mutex_unlock(&wl->mutex);
 483
 484         cancel_work_sync(&wl->irq_work);
 485         cancel_work_sync(&wl->tx_work);
 486         cancel_delayed_work_sync(&wl->ps_work);
 487         cancel_delayed_work_sync(&wl->elp_work);
 488
 489         mutex_lock(&wl->mutex);
 490
 491         /* let's notify MAC80211 about the remaining pending TX frames */
 492         wl1251_tx_flush(wl);
 493         wl1251_power_off(wl);
 494
 495         memset(wl->bssid, 0, ETH_ALEN);
 496         wl->listen_int = 1;
 497         wl->bss_type = MAX_BSS_TYPE;
 498
 499         wl->data_in_count = 0;
 500         wl->rx_counter = 0;
 501         wl->rx_handled = 0;
 502         wl->rx_current_buffer = 0;
 503         wl->rx_last_id = 0;
 504         wl->next_tx_complete = 0;
 505         wl->elp = false;
 506         wl->station_mode = STATION_ACTIVE_MODE;
 507         wl->tx_queue_stopped = false;
 508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 509         wl->rssi_thold = 0;
 510         wl->channel = WL1251_DEFAULT_CHANNEL;
 511         wl->monitor_present = false;
 512
 513         wl1251_debugfs_reset(wl);
 514
 515         mutex_unlock(&wl->mutex);
 516 }
 517
 518 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 519                                    struct ieee80211_vif *vif)
 520 {
 521         struct wl1251 *wl = hw->priv;
 522         int ret = 0;
 523
 524         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 525                      vif->type, vif->addr);
 526
 527         mutex_lock(&wl->mutex);
 528         if (wl->vif) {
 529                 ret = -EBUSY;
 530                 goto out;
 531         }
 532
 533         wl->vif = vif;
 534
 535         switch (vif->type) {
 536         case NL80211_IFTYPE_STATION:
 537                 wl->bss_type = BSS_TYPE_STA_BSS;
 538                 break;
 539         case NL80211_IFTYPE_ADHOC:
 540                 wl->bss_type = BSS_TYPE_IBSS;
 541                 break;
 542         default:
 543                 ret = -EOPNOTSUPP;
 544                 goto out;
 545         }
 546
 547         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 548                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 549                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 550                 ret = wl1251_acx_station_id(wl);
 551                 if (ret < 0)
 552                         goto out;
 553         }
 554
 555 out:
 556         mutex_unlock(&wl->mutex);
 557         return ret;
 558 }
 559
 560 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 561                                          struct ieee80211_vif *vif)
 562 {
 563         struct wl1251 *wl = hw->priv;
 564
 565         mutex_lock(&wl->mutex);
 566         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 567         wl->vif = NULL;
 568         mutex_unlock(&wl->mutex);
 569 }
 570
 571 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 572 {
 573         struct ieee80211_qos_hdr template;
 574
 575         memset(&template, 0, sizeof(template));
 576
 577         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 578         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 579         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 580
 581         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 582                                              IEEE80211_STYPE_QOS_NULLFUNC |
 583                                              IEEE80211_FCTL_TODS);
 584
 585         /* FIXME: not sure what priority to use here */
 586         template.qos_ctrl = cpu_to_le16(0);
 587
 588         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 589                                        sizeof(template));
 590 }
 591
 592 static void wl1251_ps_work(struct work_struct *work)
 593 {
 594         struct delayed_work *dwork;
 595         struct wl1251 *wl;
 596         unsigned long diff, wait;
 597         bool need_ps;
 598         bool have_ps;
 599         int ret;
 600         int i;
 601
 602         dwork = container_of(work, struct delayed_work, work);
 603         wl = container_of(dwork, struct wl1251, ps_work);
 604
 605         mutex_lock(&wl->mutex);
 606
 607         /* don't change PS modes while still transitioning, to avoid possbile
 608          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 609         if (wl->ps_transitioning) {
 610                 diff = jiffies - wl->ps_change_jiffies;
 611                 if (diff > msecs_to_jiffies(500)) {
 612                         wl1251_error("PS change taking too long: %lu", diff);
 613                         wl->ps_transitioning = false;
 614                 } else {
 615                         //wl1251_error("PS still transitioning");
 616                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 617                                 msecs_to_jiffies(50));
 618                         goto out;
 619                 }
 620         }
 621
 622         need_ps = wl->psm_requested && !wl->bss_lost;
 623         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 624
 625         if (need_ps == have_ps) {
 626                 //wl1251_info("ps: already in mode %d", have_ps);
 627                 goto out;
 628         }
 629
 630         /* don't enter PS if there was recent activity */
 631         if (need_ps) {
 632                 wait = 0;
 633
 634                 diff = jiffies - wl->last_io_jiffies;
 635                 if (diff < msecs_to_jiffies(150)) {
 636                         //wl1251_info("ps: postponed psm, j %ld", diff);
 637                         wait = msecs_to_jiffies(150) - diff + 1;
 638                 }
 639
 640                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 641                         if (wl->tx_frames[i] != NULL) {
 642                                 //wl1251_error("  frm %d busy", i);
 643                                 if (wait < msecs_to_jiffies(50))
 644                                         wait = msecs_to_jiffies(50);
 645                                 break;
 646                         }
 647                 }
 648
 649                 if (wait > 0) {
 650                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 651                         goto out;
 652                 }
 653         }
 654
 655         ret = wl1251_ps_elp_wakeup(wl);
 656         if (ret < 0)
 657                 goto out;
 658
 659         if (need_ps) {
 660                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 661                                             wl->dtim_period);
 662         }
 663         ret = wl1251_ps_set_mode(wl,
 664                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 665         if (ret < 0)
 666                 goto out_sleep;
 667
 668         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 669         //      jiffies - wl->last_io_jiffies);
 670
 671 out_sleep:
 672         wl1251_ps_elp_sleep(wl);
 673
 674 out:
 675         mutex_unlock(&wl->mutex);
 676 }
 677
 678 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 679 {
 680         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 681 }
 682
 683 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 684 {
 685         struct wl1251 *wl = hw->priv;
 686         struct ieee80211_conf *conf = &hw->conf;
 687         int channel, ret = 0;
 688
 689         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 690
 691         wl1251_debug(DEBUG_MAC80211,
 692                      "mac80211 config ch %d monitor %s psm %s power %d",
 693                      channel,
 694                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 695                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 696                      conf->power_level);
 697
 698         mutex_lock(&wl->mutex);
 699
 700         ret = wl1251_ps_elp_wakeup(wl);
 701         if (ret < 0)
 702                 goto out;
 703
 704         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 705                 u32 mode;
 706
 707                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 708                         wl->monitor_present = true;
 709                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 710                 } else {
 711                         wl->monitor_present = false;
 712                         mode = 0;
 713                 }
 714
 715                 ret = wl1251_acx_feature_cfg(wl, mode);
 716                 if (ret < 0)
 717                         goto out_sleep;
 718         }
 719
 720         if (channel != wl->channel) {
 721                 wl->channel = channel;
 722
 723                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 724                                   wl->beacon_int, wl->dtim_period);
 725                 if (ret < 0)
 726                         goto out_sleep;
 727         }
 728
 729         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 730                 wl1251_debug(DEBUG_PSM, "psm enabled");
 731
 732                 wl->psm_requested = true;
 733
 734                 wl->dtim_period = conf->ps_dtim_period;
 735
 736                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 737         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 738                 wl1251_debug(DEBUG_PSM, "psm disabled");
 739
 740                 wl->psm_requested = false;
 741
 742                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 743         }
 744
 745         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 746                 if (conf->flags & IEEE80211_CONF_IDLE) {
 747                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 748                         if (ret < 0)
 749                                 goto out_sleep;
 750                 } else {
 751                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 752                         if (ret < 0)
 753                                 goto out_sleep;
 754
 755                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 756                         if (ret < 0)
 757                                 wl1251_error("error waiting for wakeup");
 758
 759                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 760                                           wl->beacon_int, wl->dtim_period);
 761                         if (ret < 0)
 762                                 goto out_sleep;
 763                 }
 764         }
 765
 766         if (conf->power_level != wl->power_level) {
 767                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 768                 if (ret < 0)
 769                         goto out_sleep;
 770
 771                 wl->power_level = conf->power_level;
 772         }
 773
 774 out_sleep:
 775         wl1251_ps_elp_sleep(wl);
 776
 777 out:
 778         mutex_unlock(&wl->mutex);
 779
 780         return ret;
 781 }
 782
 783 struct wl1251_filter_params {
 784         bool enabled;
 785         int mc_list_length;
 786         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 787 };
 788
 789 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 790                                        struct netdev_hw_addr_list *mc_list)
 791 {
 792         struct wl1251_filter_params *fp;
 793         struct netdev_hw_addr *ha;
 794         struct wl1251 *wl = hw->priv;
 795
 796         if (unlikely(wl->state == WL1251_STATE_OFF))
 797                 return 0;
 798
 799         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 800         if (!fp) {
 801                 wl1251_error("Out of memory setting filters.");
 802                 return 0;
 803         }
 804
 805         /* update multicast filtering parameters */
 806         fp->mc_list_length = 0;
 807         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 808                 fp->enabled = false;
 809         } else {
 810                 fp->enabled = true;
 811                 netdev_hw_addr_list_for_each(ha, mc_list) {
 812                         memcpy(fp->mc_list[fp->mc_list_length],
 813                                         ha->addr, ETH_ALEN);
 814                         fp->mc_list_length++;
 815                 }
 816         }
 817
 818         return (u64)(unsigned long)fp;
 819 }
 820
 821 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 822                                   FIF_ALLMULTI | \
 823                                   FIF_FCSFAIL | \
 824                                   FIF_BCN_PRBRESP_PROMISC | \
 825                                   FIF_CONTROL | \
 826                                   FIF_OTHER_BSS | \
 827                                   FIF_PROBE_REQ)
 828
 829 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 830                                        unsigned int changed,
 831                                        unsigned int *total, u64 multicast)
 832 {
 833         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 834         struct wl1251 *wl = hw->priv;
 835         int ret;
 836
 837         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 838
 839         *total &= WL1251_SUPPORTED_FILTERS;
 840         changed &= WL1251_SUPPORTED_FILTERS;
 841
 842         if (changed == 0) {
 843                 /* no filters which we support changed */
 844                 kfree(fp);
 845                 return;
 846         }
 847
 848         mutex_lock(&wl->mutex);
 849
 850         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 851         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 852
 853         if (*total & FIF_PROMISC_IN_BSS) {
 854                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 855                 wl->rx_config |= CFG_RX_ALL_GOOD;
 856         }
 857         if (*total & FIF_ALLMULTI)
 858                 /*
 859                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 860                  * all multicast frames
 861                  */
 862                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 863         if (*total & FIF_FCSFAIL)
 864                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 865         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 866                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 867                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 868         }
 869         if (*total & FIF_CONTROL)
 870                 wl->rx_filter |= CFG_RX_CTL_EN;
 871         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 872                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 873         if (*total & FIF_PROBE_REQ)
 874                 wl->rx_filter |= CFG_RX_PREQ_EN;
 875
 876         if (wl->state == WL1251_STATE_OFF)
 877                 goto out;
 878
 879         ret = wl1251_ps_elp_wakeup(wl);
 880         if (ret < 0)
 881                 goto out;
 882
 883         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 884                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 885         else if (fp)
 886                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 887                                                    fp->mc_list,
 888                                                    fp->mc_list_length);
 889         if (ret < 0)
 890                 goto out;
 891
 892         /* send filters to firmware */
 893         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 894
 895         wl1251_ps_elp_sleep(wl);
 896
 897 out:
 898         mutex_unlock(&wl->mutex);
 899         kfree(fp);
 900 }
 901
 902 /* HW encryption */
 903 static int wl1251_set_key_type(struct wl1251 *wl,
 904                                struct wl1251_cmd_set_keys *key,
 905                                enum set_key_cmd cmd,
 906                                struct ieee80211_key_conf *mac80211_key,
 907                                const u8 *addr)
 908 {
 909         switch (mac80211_key->cipher) {
 910         case WLAN_CIPHER_SUITE_WEP40:
 911         case WLAN_CIPHER_SUITE_WEP104:
 912                 if (is_broadcast_ether_addr(addr))
 913                         key->key_type = KEY_WEP_DEFAULT;
 914                 else
 915                         key->key_type = KEY_WEP_ADDR;
 916
 917                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 918                 break;
 919         case WLAN_CIPHER_SUITE_TKIP:
 920                 if (is_broadcast_ether_addr(addr))
 921                         key->key_type = KEY_TKIP_MIC_GROUP;
 922                 else
 923                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 924
 925                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 926                 break;
 927         case WLAN_CIPHER_SUITE_CCMP:
 928                 if (is_broadcast_ether_addr(addr))
 929                         key->key_type = KEY_AES_GROUP;
 930                 else
 931                         key->key_type = KEY_AES_PAIRWISE;
 932                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 933                 break;
 934         default:
 935                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 936                 return -EOPNOTSUPP;
 937         }
 938
 939         return 0;
 940 }
 941
 942 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 943                              struct ieee80211_vif *vif,
 944                              struct ieee80211_sta *sta,
 945                              struct ieee80211_key_conf *key)
 946 {
 947         struct wl1251 *wl = hw->priv;
 948         struct wl1251_cmd_set_keys *wl_cmd;
 949         const u8 *addr;
 950         int ret;
 951
 952         static const u8 bcast_addr[ETH_ALEN] =
 953                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 954
 955         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 956
 957         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 958         if (!wl_cmd) {
 959                 ret = -ENOMEM;
 960                 goto out;
 961         }
 962
 963         addr = sta ? sta->addr : bcast_addr;
 964
 965         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 966         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 967         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 968                      key->cipher, key->keyidx, key->keylen, key->flags);
 969         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 970
 971         if (is_zero_ether_addr(addr)) {
 972                 /* We dont support TX only encryption */
 973                 ret = -EOPNOTSUPP;
 974                 goto out;
 975         }
 976
 977         mutex_lock(&wl->mutex);
 978
 979         switch (cmd) {
 980         case SET_KEY:
 981                 if (wl->monitor_present) {
 982                         ret = -EOPNOTSUPP;
 983                         goto out_unlock;
 984                 }
 985                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 986                 break;
 987         case DISABLE_KEY:
 988                 wl_cmd->key_action = KEY_REMOVE;
 989                 break;
 990         default:
 991                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 992                 break;
 993         }
 994
 995         ret = wl1251_ps_elp_wakeup(wl);
 996         if (ret < 0)
 997                 goto out_unlock;
 998
 999         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1000         if (ret < 0) {
1001                 wl1251_error("Set KEY type failed");
1002                 goto out_sleep;
1003         }
1004
1005         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1006                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1007
1008         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1009             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1010                 /*
1011                  * We get the key in the following form:
1012                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1013                  * but the target is expecting:
1014                  * TKIP - RX MIC - TX MIC
1015                  */
1016                 memcpy(wl_cmd->key, key->key, 16);
1017                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1018                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1019
1020         } else {
1021                 memcpy(wl_cmd->key, key->key, key->keylen);
1022         }
1023         wl_cmd->key_size = key->keylen;
1024
1025         wl_cmd->id = key->keyidx;
1026         wl_cmd->ssid_profile = 0;
1027
1028         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1029
1030         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1031         if (ret < 0) {
1032                 wl1251_warning("could not set keys");
1033                 goto out_sleep;
1034         }
1035
1036 out_sleep:
1037         wl1251_ps_elp_sleep(wl);
1038
1039 out_unlock:
1040         mutex_unlock(&wl->mutex);
1041
1042 out:
1043         kfree(wl_cmd);
1044
1045         return ret;
1046 }
1047
1048 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1049                              struct ieee80211_vif *vif,
1050                              struct cfg80211_scan_request *req)
1051 {
1052         struct wl1251 *wl = hw->priv;
1053         struct sk_buff *skb;
1054         size_t ssid_len = 0;
1055         u8 *ssid = NULL;
1056         int ret;
1057
1058         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1059
1060         if (req->n_ssids) {
1061                 ssid = req->ssids[0].ssid;
1062                 ssid_len = req->ssids[0].ssid_len;
1063         }
1064
1065         mutex_lock(&wl->mutex);
1066
1067         if (wl->scanning) {
1068                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1069                 ret = -EINVAL;
1070                 goto out;
1071         }
1072
1073         ret = wl1251_ps_elp_wakeup(wl);
1074         if (ret < 0)
1075                 goto out;
1076
1077         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1078                                      req->ie, req->ie_len);
1079         if (!skb) {
1080                 ret = -ENOMEM;
1081                 goto out;
1082         }
1083
1084         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1085                                       skb->len);
1086         dev_kfree_skb(skb);
1087         if (ret < 0)
1088                 goto out_sleep;
1089
1090         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1091         if (ret < 0)
1092                 goto out_sleep;
1093
1094         wl->scanning = true;
1095
1096         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1097                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1098         if (ret < 0) {
1099                 wl->scanning = false;
1100                 goto out_sleep;
1101         }
1102
1103 out_sleep:
1104         wl1251_ps_elp_sleep(wl);
1105
1106 out:
1107         mutex_unlock(&wl->mutex);
1108
1109         return ret;
1110 }
1111
1112 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1113 {
1114         struct wl1251 *wl = hw->priv;
1115         int ret;
1116
1117         mutex_lock(&wl->mutex);
1118
1119         ret = wl1251_ps_elp_wakeup(wl);
1120         if (ret < 0)
1121                 goto out;
1122
1123         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1124         if (ret < 0)
1125                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1126
1127         wl1251_ps_elp_sleep(wl);
1128
1129 out:
1130         mutex_unlock(&wl->mutex);
1131
1132         return ret;
1133 }
1134
1135 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1136                                        struct ieee80211_vif *vif,
1137                                        struct ieee80211_bss_conf *bss_conf,
1138                                        u32 changed)
1139 {
1140         struct wl1251 *wl = hw->priv;
1141         struct sk_buff *beacon, *skb;
1142         bool enable;
1143         int ret;
1144
1145         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1146
1147         mutex_lock(&wl->mutex);
1148
1149         ret = wl1251_ps_elp_wakeup(wl);
1150         if (ret < 0)
1151                 goto out;
1152
1153         if (changed & BSS_CHANGED_CQM) {
1154                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1155                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1156                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1157                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1158                 if (ret < 0)
1159                         goto out;
1160                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1161         }
1162
1163         if (changed & BSS_CHANGED_BSSID) {
1164                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1165
1166                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1167                 if (!skb)
1168                         goto out_sleep;
1169
1170                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1171                                               skb->data, skb->len);
1172                 dev_kfree_skb(skb);
1173                 if (ret < 0)
1174                         goto out_sleep;
1175
1176                 ret = wl1251_build_qos_null_data(wl);
1177                 if (ret < 0)
1178                         goto out;
1179
1180                 if (wl->bss_type != BSS_TYPE_IBSS) {
1181                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1182                                           wl->beacon_int, wl->dtim_period);
1183                         if (ret < 0)
1184                                 goto out_sleep;
1185                 }
1186         }
1187
1188         if (changed & BSS_CHANGED_ASSOC) {
1189                 if (bss_conf->assoc) {
1190                         wl->beacon_int = bss_conf->beacon_int;
1191
1192                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1193                         if (!skb)
1194                                 goto out_sleep;
1195
1196                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1197                                                       skb->data,
1198                                                       skb->len);
1199                         dev_kfree_skb(skb);
1200                         if (ret < 0)
1201                                 goto out_sleep;
1202
1203                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1204                         if (ret < 0)
1205                                 goto out_sleep;
1206                 } else {
1207                         /* use defaults when not associated */
1208                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1209                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1210                 }
1211         }
1212         if (changed & BSS_CHANGED_ERP_SLOT) {
1213                 if (bss_conf->use_short_slot)
1214                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1215                 else
1216                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1217                 if (ret < 0) {
1218                         wl1251_warning("Set slot time failed %d", ret);
1219                         goto out_sleep;
1220                 }
1221         }
1222
1223         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1224                 if (bss_conf->use_short_preamble)
1225                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1226                 else
1227                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1228         }
1229
1230         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1231                 if (bss_conf->use_cts_prot)
1232                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1233                 else
1234                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1235                 if (ret < 0) {
1236                         wl1251_warning("Set ctsprotect failed %d", ret);
1237                         goto out_sleep;
1238                 }
1239         }
1240
1241         if (changed & BSS_CHANGED_ARP_FILTER) {
1242                 __be32 addr = bss_conf->arp_addr_list[0];
1243                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1244
1245                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1246                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1247
1248                 if (ret < 0)
1249                         goto out_sleep;
1250         }
1251
1252         if (changed & BSS_CHANGED_BEACON) {
1253                 beacon = ieee80211_beacon_get(hw, vif);
1254                 if (!beacon)
1255                         goto out_sleep;
1256
1257                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1258                                               beacon->len);
1259
1260                 if (ret < 0) {
1261                         dev_kfree_skb(beacon);
1262                         goto out_sleep;
1263                 }
1264
1265                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1266                                               beacon->len);
1267
1268                 dev_kfree_skb(beacon);
1269
1270                 if (ret < 0)
1271                         goto out_sleep;
1272
1273                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1274                                   wl->channel, wl->dtim_period);
1275
1276                 if (ret < 0)
1277                         goto out_sleep;
1278         }
1279
1280 out_sleep:
1281         wl1251_ps_elp_sleep(wl);
1282
1283 out:
1284         mutex_unlock(&wl->mutex);
1285 }
1286
1287
1288 /* can't be const, mac80211 writes to this */
1289 static struct ieee80211_rate wl1251_rates[] = {
1290         { .bitrate = 10,
1291           .hw_value = 0x1,
1292           .hw_value_short = 0x1, },
1293         { .bitrate = 20,
1294           .hw_value = 0x2,
1295           .hw_value_short = 0x2,
1296           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1297         { .bitrate = 55,
1298           .hw_value = 0x4,
1299           .hw_value_short = 0x4,
1300           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1301         { .bitrate = 110,
1302           .hw_value = 0x20,
1303           .hw_value_short = 0x20,
1304           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1305         { .bitrate = 60,
1306           .hw_value = 0x8,
1307           .hw_value_short = 0x8, },
1308         { .bitrate = 90,
1309           .hw_value = 0x10,
1310           .hw_value_short = 0x10, },
1311         { .bitrate = 120,
1312           .hw_value = 0x40,
1313           .hw_value_short = 0x40, },
1314         { .bitrate = 180,
1315           .hw_value = 0x80,
1316           .hw_value_short = 0x80, },
1317         { .bitrate = 240,
1318           .hw_value = 0x200,
1319           .hw_value_short = 0x200, },
1320         { .bitrate = 360,
1321          .hw_value = 0x400,
1322          .hw_value_short = 0x400, },
1323         { .bitrate = 480,
1324           .hw_value = 0x800,
1325           .hw_value_short = 0x800, },
1326         { .bitrate = 540,
1327           .hw_value = 0x1000,
1328           .hw_value_short = 0x1000, },
1329 };
1330
1331 /* can't be const, mac80211 writes to this */
1332 static struct ieee80211_channel wl1251_channels[] = {
1333         { .hw_value = 1, .center_freq = 2412},
1334         { .hw_value = 2, .center_freq = 2417},
1335         { .hw_value = 3, .center_freq = 2422},
1336         { .hw_value = 4, .center_freq = 2427},
1337         { .hw_value = 5, .center_freq = 2432},
1338         { .hw_value = 6, .center_freq = 2437},
1339         { .hw_value = 7, .center_freq = 2442},
1340         { .hw_value = 8, .center_freq = 2447},
1341         { .hw_value = 9, .center_freq = 2452},
1342         { .hw_value = 10, .center_freq = 2457},
1343         { .hw_value = 11, .center_freq = 2462},
1344         { .hw_value = 12, .center_freq = 2467},
1345         { .hw_value = 13, .center_freq = 2472},
1346 };
1347
1348 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1349                              struct ieee80211_vif *vif, u16 queue,
1350                              const struct ieee80211_tx_queue_params *params)
1351 {
1352         enum wl1251_acx_ps_scheme ps_scheme;
1353         struct wl1251 *wl = hw->priv;
1354         int ret;
1355
1356         mutex_lock(&wl->mutex);
1357
1358         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1359
1360         ret = wl1251_ps_elp_wakeup(wl);
1361         if (ret < 0)
1362                 goto out;
1363
1364         /* mac80211 uses units of 32 usec */
1365         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1366                                 params->cw_min, params->cw_max,
1367                                 params->aifs, params->txop * 32);
1368         if (ret < 0)
1369                 goto out_sleep;
1370
1371         if (params->uapsd)
1372                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1373         else
1374                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1375
1376         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1377                                  CHANNEL_TYPE_EDCF,
1378                                  wl1251_tx_get_queue(queue), ps_scheme,
1379                                  WL1251_ACX_ACK_POLICY_LEGACY);
1380         if (ret < 0)
1381                 goto out_sleep;
1382
1383 out_sleep:
1384         wl1251_ps_elp_sleep(wl);
1385
1386 out:
1387         mutex_unlock(&wl->mutex);
1388
1389         return ret;
1390 }
1391
1392 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1393                                 struct survey_info *survey)
1394 {
1395         struct wl1251 *wl = hw->priv;
1396         struct ieee80211_conf *conf = &hw->conf;
1397
1398         if (idx != 0)
1399                 return -ENOENT;
1400
1401         survey->channel = conf->channel;
1402         survey->filled = SURVEY_INFO_NOISE_DBM;
1403         survey->noise = wl->noise;
1404
1405         return 0;
1406 }
1407
1408 /* can't be const, mac80211 writes to this */
1409 static struct ieee80211_supported_band wl1251_band_2ghz = {
1410         .channels = wl1251_channels,
1411         .n_channels = ARRAY_SIZE(wl1251_channels),
1412         .bitrates = wl1251_rates,
1413         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1414 };
1415
1416 static const struct ieee80211_ops wl1251_ops = {
1417         .start = wl1251_op_start,
1418         .stop = wl1251_op_stop,
1419         .add_interface = wl1251_op_add_interface,
1420         .remove_interface = wl1251_op_remove_interface,
1421         .config = wl1251_op_config,
1422         .prepare_multicast = wl1251_op_prepare_multicast,
1423         .configure_filter = wl1251_op_configure_filter,
1424         .tx = wl1251_op_tx,
1425         .set_key = wl1251_op_set_key,
1426         .hw_scan = wl1251_op_hw_scan,
1427         .bss_info_changed = wl1251_op_bss_info_changed,
1428         .set_rts_threshold = wl1251_op_set_rts_threshold,
1429         .conf_tx = wl1251_op_conf_tx,
1430         .get_survey = wl1251_op_get_survey,
1431 };
1432
1433 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1434 {
1435         unsigned long timeout;
1436
1437         wl1251_reg_write32(wl, EE_ADDR, offset);
1438         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1439
1440         /* EE_CTL_READ clears when data is ready */
1441         timeout = jiffies + msecs_to_jiffies(100);
1442         while (1) {
1443                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1444                         break;
1445
1446                 if (time_after(jiffies, timeout))
1447                         return -ETIMEDOUT;
1448
1449                 msleep(1);
1450         }
1451
1452         *data = wl1251_reg_read32(wl, EE_DATA);
1453         return 0;
1454 }
1455
1456 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1457                               u8 *data, size_t len)
1458 {
1459         size_t i;
1460         int ret;
1461
1462         wl1251_reg_write32(wl, EE_START, 0);
1463
1464         for (i = 0; i < len; i++) {
1465                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1466                 if (ret < 0)
1467                         return ret;
1468         }
1469
1470         return 0;
1471 }
1472
1473 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1474 {
1475         u8 mac[ETH_ALEN];
1476         int i, ret;
1477
1478         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1479
1480         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1481         if (ret < 0) {
1482                 wl1251_warning("failed to read MAC address from EEPROM");
1483                 return ret;
1484         }
1485
1486         /* MAC is stored in reverse order */
1487         for (i = 0; i < ETH_ALEN; i++)
1488                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1489
1490         return 0;
1491 }
1492
1493 /* temporary (?) hack for EEPROM dumping
1494  * (it seems this can only be done before fw is running) */
1495 static int wl1251_dump_eeprom(struct wl1251 *wl)
1496 {
1497         int ret;
1498
1499         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1500
1501         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1502         if (wl->eeprom_dump == NULL) {
1503                 ret = -ENOMEM;
1504                 goto out;
1505         }
1506
1507         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1508         if (ret != 0) {
1509                 wl1251_error("eeprom dump failed: %d", ret);
1510                 kfree(wl->eeprom_dump);
1511                 wl->eeprom_dump = NULL;
1512                 goto out;
1513         }
1514
1515         wl1251_info("eeprom dumped.");
1516
1517 out:
1518         return ret;
1519 }
1520
1521 static int wl1251_register_hw(struct wl1251 *wl)
1522 {
1523         int ret;
1524
1525         if (wl->mac80211_registered)
1526                 return 0;
1527
1528         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1529
1530         ret = ieee80211_register_hw(wl->hw);
1531         if (ret < 0) {
1532                 wl1251_error("unable to register mac80211 hw: %d", ret);
1533                 return ret;
1534         }
1535
1536         wl->mac80211_registered = true;
1537
1538         wl1251_notice("loaded");
1539
1540         return 0;
1541 }
1542
1543 int wl1251_init_ieee80211(struct wl1251 *wl)
1544 {
1545         int ret;
1546
1547         /* The tx descriptor buffer and the TKIP space */
1548         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1549                 + WL1251_TKIP_IV_SPACE;
1550
1551         /* unit us */
1552         /* FIXME: find a proper value */
1553         wl->hw->channel_change_time = 10000;
1554
1555         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1556                 IEEE80211_HW_SUPPORTS_PS |
1557                 IEEE80211_HW_BEACON_FILTER |
1558                 IEEE80211_HW_SUPPORTS_UAPSD |
1559                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1560
1561         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1562                                          BIT(NL80211_IFTYPE_ADHOC);
1563         wl->hw->wiphy->max_scan_ssids = 1;
1564         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1565
1566         wl->hw->queues = 4;
1567
1568         if (wl->use_eeprom)
1569                 wl1251_read_eeprom_mac(wl);
1570         if (wl->dump_eeprom)
1571                 wl1251_dump_eeprom(wl);
1572
1573         ret = wl1251_register_hw(wl);
1574         if (ret)
1575                 goto out;
1576
1577         wl1251_debugfs_init(wl);
1578         wl1251_notice("initialized");
1579
1580         ret = 0;
1581
1582 out:
1583         return ret;
1584 }
1585 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1586
1587 struct ieee80211_hw *wl1251_alloc_hw(void)
1588 {
1589         struct ieee80211_hw *hw;
1590         struct wl1251 *wl;
1591         int i;
1592         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1593
1594         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1595         if (!hw) {
1596                 wl1251_error("could not alloc ieee80211_hw");
1597                 return ERR_PTR(-ENOMEM);
1598         }
1599
1600         wl = hw->priv;
1601         memset(wl, 0, sizeof(*wl));
1602
1603         wl->hw = hw;
1604
1605         wl->data_in_count = 0;
1606
1607         skb_queue_head_init(&wl->tx_queue);
1608
1609         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1610         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1611         wl->channel = WL1251_DEFAULT_CHANNEL;
1612         wl->monitor_present = false;
1613         wl->scanning = false;
1614         wl->default_key = 0;
1615         wl->listen_int = 1;
1616         wl->rx_counter = 0;
1617         wl->rx_handled = 0;
1618         wl->rx_current_buffer = 0;
1619         wl->rx_last_id = 0;
1620         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1621         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1622         wl->elp = false;
1623         wl->station_mode = STATION_ACTIVE_MODE;
1624         wl->psm_requested = false;
1625         wl->tx_queue_stopped = false;
1626         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1627         wl->rssi_thold = 0;
1628         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1629         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1630         wl->vif = NULL;
1631
1632         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1633                 wl->tx_frames[i] = NULL;
1634
1635         wl->next_tx_complete = 0;
1636
1637         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1638         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1639
1640         /*
1641          * In case our MAC address is not correctly set,
1642          * we use a random but Nokia MAC.
1643          */
1644         memcpy(wl->mac_addr, nokia_oui, 3);
1645         get_random_bytes(wl->mac_addr + 3, 3);
1646
1647         wl->state = WL1251_STATE_OFF;
1648         mutex_init(&wl->mutex);
1649
1650         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1651         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1652
1653         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1654         if (!wl->rx_descriptor) {
1655                 wl1251_error("could not allocate memory for rx descriptor");
1656                 ieee80211_free_hw(hw);
1657                 return ERR_PTR(-ENOMEM);
1658         }
1659
1660         return hw;
1661 }
1662 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1663
1664 int wl1251_free_hw(struct wl1251 *wl)
1665 {
1666         ieee80211_unregister_hw(wl->hw);
1667
1668         wl1251_debugfs_exit(wl);
1669
1670         kfree(wl->target_mem_map);
1671         kfree(wl->data_path);
1672         vfree(wl->fw);
1673         wl->fw = NULL;
1674         kfree(wl->nvs);
1675         wl->nvs = NULL;
1676
1677         kfree(wl->rx_descriptor);
1678         wl->rx_descriptor = NULL;
1679
1680         ieee80211_free_hw(wl->hw);
1681
1682         if (wl->eeprom_dump != NULL)
1683                 kfree(wl->eeprom_dump);
1684
1685         return 0;
1686 }
1687 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1688
1689 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1690 MODULE_LICENSE("GPL");
1691 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1692 MODULE_FIRMWARE(WL1251_FW_NAME);