drivers/net/wireless/wl12xx/wl1271_main.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/firmware.h>
  28 #include <linux/delay.h>
  29 #include <linux/irq.h>
  30 #include <linux/spi/spi.h>
  31 #include <linux/crc32.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/spi/wl12xx.h>
  34
  35 #include "wl1271.h"
  36 #include "wl12xx_80211.h"
  37 #include "wl1271_reg.h"
  38 #include "wl1271_spi.h"
  39 #include "wl1271_event.h"
  40 #include "wl1271_tx.h"
  41 #include "wl1271_rx.h"
  42 #include "wl1271_ps.h"
  43 #include "wl1271_init.h"
  44 #include "wl1271_debugfs.h"
  45 #include "wl1271_cmd.h"
  46 #include "wl1271_boot.h"
  47
  48 static int wl1271_plt_init(struct wl1271 *wl)
  49 {
  50         int ret;
  51
  52         ret = wl1271_acx_init_mem_config(wl);
  53         if (ret < 0)
  54                 return ret;
  55
  56         ret = wl1271_cmd_data_path(wl, wl->channel, 1);
  57         if (ret < 0)
  58                 return ret;
  59
  60         return 0;
  61 }
  62
  63 static void wl1271_disable_interrupts(struct wl1271 *wl)
  64 {
  65         disable_irq(wl->irq);
  66 }
  67
  68 static void wl1271_power_off(struct wl1271 *wl)
  69 {
  70         wl->set_power(false);
  71 }
  72
  73 static void wl1271_power_on(struct wl1271 *wl)
  74 {
  75         wl->set_power(true);
  76 }
  77
  78 static void wl1271_fw_status(struct wl1271 *wl, struct wl1271_fw_status *status)
  79 {
  80         u32 total = 0;
  81         int i;
  82
  83         /*
  84          * FIXME: Reading the FW status directly from the registers seems to
  85          * be the right thing to do, but it doesn't work.  And in the
  86          * reference driver, there is a workaround called
  87          * USE_SDIO_24M_WORKAROUND, which reads the status from memory
  88          * instead, so we do the same here.
  89          */
  90
  91         wl1271_spi_mem_read(wl, STATUS_MEM_ADDRESS, status, sizeof(*status));
  92
  93         wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
  94                      "drv_rx_counter = %d, tx_results_counter = %d)",
  95                      status->intr,
  96                      status->fw_rx_counter,
  97                      status->drv_rx_counter,
  98                      status->tx_results_counter);
  99
 100         /* update number of available TX blocks */
 101         for (i = 0; i < NUM_TX_QUEUES; i++) {
 102                 u32 cnt = status->tx_released_blks[i] - wl->tx_blocks_freed[i];
 103                 wl->tx_blocks_freed[i] = status->tx_released_blks[i];
 104                 wl->tx_blocks_available += cnt;
 105                 total += cnt;
 106         }
 107
 108         /* if more blocks are available now, schedule some tx work */
 109         if (total && !skb_queue_empty(&wl->tx_queue))
 110                 schedule_work(&wl->tx_work);
 111
 112         /* update the host-chipset time offset */
 113         wl->time_offset = jiffies_to_usecs(jiffies) - status->fw_localtime;
 114 }
 115
 116 #define WL1271_IRQ_MAX_LOOPS 10
 117 static void wl1271_irq_work(struct work_struct *work)
 118 {
 119         u32 intr, ctr = WL1271_IRQ_MAX_LOOPS;
 120         int ret;
 121         struct wl1271 *wl =
 122                 container_of(work, struct wl1271, irq_work);
 123
 124         mutex_lock(&wl->mutex);
 125
 126         wl1271_debug(DEBUG_IRQ, "IRQ work");
 127
 128         if (wl->state == WL1271_STATE_OFF)
 129                 goto out;
 130
 131         ret = wl1271_ps_elp_wakeup(wl, true);
 132         if (ret < 0)
 133                 goto out;
 134
 135         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
 136
 137         intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 138         if (!intr) {
 139                 wl1271_debug(DEBUG_IRQ, "Zero interrupt received.");
 140                 goto out_sleep;
 141         }
 142
 143         intr &= WL1271_INTR_MASK;
 144
 145         do {
 146                 wl1271_fw_status(wl, wl->fw_status);
 147
 148
 149                 if (intr & (WL1271_ACX_INTR_EVENT_A |
 150                             WL1271_ACX_INTR_EVENT_B)) {
 151                         wl1271_debug(DEBUG_IRQ,
 152                                      "WL1271_ACX_INTR_EVENT (0x%x)", intr);
 153                         if (intr & WL1271_ACX_INTR_EVENT_A)
 154                                 wl1271_event_handle(wl, 0);
 155                         else
 156                                 wl1271_event_handle(wl, 1);
 157                 }
 158
 159                 if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
 160                         wl1271_debug(DEBUG_IRQ,
 161                                      "WL1271_ACX_INTR_INIT_COMPLETE");
 162
 163                 if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
 164                         wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
 165
 166                 if (intr & WL1271_ACX_INTR_DATA) {
 167                         u8 tx_res_cnt = wl->fw_status->tx_results_counter -
 168                                 wl->tx_results_count;
 169
 170                         wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
 171
 172                         /* check for tx results */
 173                         if (tx_res_cnt)
 174                                 wl1271_tx_complete(wl, tx_res_cnt);
 175
 176                         wl1271_rx(wl, wl->fw_status);
 177                 }
 178
 179                 intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 180                 intr &= WL1271_INTR_MASK;
 181         } while (intr && --ctr);
 182
 183 out_sleep:
 184         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
 185                            WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
 186         wl1271_ps_elp_sleep(wl);
 187
 188 out:
 189         mutex_unlock(&wl->mutex);
 190 }
 191
 192 static irqreturn_t wl1271_irq(int irq, void *cookie)
 193 {
 194         struct wl1271 *wl;
 195         unsigned long flags;
 196
 197         wl1271_debug(DEBUG_IRQ, "IRQ");
 198
 199         wl = cookie;
 200
 201         /* complete the ELP completion */
 202         spin_lock_irqsave(&wl->wl_lock, flags);
 203         if (wl->elp_compl) {
 204                 complete(wl->elp_compl);
 205                 wl->elp_compl = NULL;
 206         }
 207
 208         schedule_work(&wl->irq_work);
 209         spin_unlock_irqrestore(&wl->wl_lock, flags);
 210
 211         return IRQ_HANDLED;
 212 }
 213
 214 static int wl1271_fetch_firmware(struct wl1271 *wl)
 215 {
 216         const struct firmware *fw;
 217         int ret;
 218
 219         ret = request_firmware(&fw, WL1271_FW_NAME, &wl->spi->dev);
 220
 221         if (ret < 0) {
 222                 wl1271_error("could not get firmware: %d", ret);
 223                 return ret;
 224         }
 225
 226         if (fw->size % 4) {
 227                 wl1271_error("firmware size is not multiple of 32 bits: %zu",
 228                              fw->size);
 229                 ret = -EILSEQ;
 230                 goto out;
 231         }
 232
 233         wl->fw_len = fw->size;
 234         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
 235
 236         if (!wl->fw) {
 237                 wl1271_error("could not allocate memory for the firmware");
 238                 ret = -ENOMEM;
 239                 goto out;
 240         }
 241
 242         memcpy(wl->fw, fw->data, wl->fw_len);
 243
 244         ret = 0;
 245
 246 out:
 247         release_firmware(fw);
 248
 249         return ret;
 250 }
 251
 252 static int wl1271_fetch_nvs(struct wl1271 *wl)
 253 {
 254         const struct firmware *fw;
 255         int ret;
 256
 257         ret = request_firmware(&fw, WL1271_NVS_NAME, &wl->spi->dev);
 258
 259         if (ret < 0) {
 260                 wl1271_error("could not get nvs file: %d", ret);
 261                 return ret;
 262         }
 263
 264         if (fw->size % 4) {
 265                 wl1271_error("nvs size is not multiple of 32 bits: %zu",
 266                              fw->size);
 267                 ret = -EILSEQ;
 268                 goto out;
 269         }
 270
 271         wl->nvs_len = fw->size;
 272         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 273
 274         if (!wl->nvs) {
 275                 wl1271_error("could not allocate memory for the nvs file");
 276                 ret = -ENOMEM;
 277                 goto out;
 278         }
 279
 280         memcpy(wl->nvs, fw->data, wl->nvs_len);
 281
 282         ret = 0;
 283
 284 out:
 285         release_firmware(fw);
 286
 287         return ret;
 288 }
 289
 290 static void wl1271_fw_wakeup(struct wl1271 *wl)
 291 {
 292         u32 elp_reg;
 293
 294         elp_reg = ELPCTRL_WAKE_UP;
 295         wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 296 }
 297
 298 static int wl1271_setup(struct wl1271 *wl)
 299 {
 300         wl->fw_status = kmalloc(sizeof(*wl->fw_status), GFP_KERNEL);
 301         if (!wl->fw_status)
 302                 return -ENOMEM;
 303
 304         wl->tx_res_if = kmalloc(sizeof(*wl->tx_res_if), GFP_KERNEL);
 305         if (!wl->tx_res_if) {
 306                 kfree(wl->fw_status);
 307                 return -ENOMEM;
 308         }
 309
 310         INIT_WORK(&wl->irq_work, wl1271_irq_work);
 311         INIT_WORK(&wl->tx_work, wl1271_tx_work);
 312         return 0;
 313 }
 314
 315 static int wl1271_chip_wakeup(struct wl1271 *wl)
 316 {
 317         int ret = 0;
 318
 319         wl1271_power_on(wl);
 320         msleep(WL1271_POWER_ON_SLEEP);
 321         wl1271_spi_reset(wl);
 322         wl1271_spi_init(wl);
 323
 324         /* We don't need a real memory partition here, because we only want
 325          * to use the registers at this point. */
 326         wl1271_set_partition(wl,
 327                              0x00000000,
 328                              0x00000000,
 329                              REGISTERS_BASE,
 330                              REGISTERS_DOWN_SIZE);
 331
 332         /* ELP module wake up */
 333         wl1271_fw_wakeup(wl);
 334
 335         /* whal_FwCtrl_BootSm() */
 336
 337         /* 0. read chip id from CHIP_ID */
 338         wl->chip.id = wl1271_reg_read32(wl, CHIP_ID_B);
 339
 340         /* 1. check if chip id is valid */
 341
 342         switch (wl->chip.id) {
 343         case CHIP_ID_1271_PG10:
 344                 wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
 345                                wl->chip.id);
 346
 347                 ret = wl1271_setup(wl);
 348                 if (ret < 0)
 349                         goto out;
 350                 break;
 351         case CHIP_ID_1271_PG20:
 352                 wl1271_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
 353                              wl->chip.id);
 354
 355                 ret = wl1271_setup(wl);
 356                 if (ret < 0)
 357                         goto out;
 358                 break;
 359         default:
 360                 wl1271_error("unsupported chip id: 0x%x", wl->chip.id);
 361                 ret = -ENODEV;
 362                 goto out;
 363         }
 364
 365         if (wl->fw == NULL) {
 366                 ret = wl1271_fetch_firmware(wl);
 367                 if (ret < 0)
 368                         goto out;
 369         }
 370
 371         /* No NVS from netlink, try to get it from the filesystem */
 372         if (wl->nvs == NULL) {
 373                 ret = wl1271_fetch_nvs(wl);
 374                 if (ret < 0)
 375                         goto out;
 376         }
 377
 378 out:
 379         return ret;
 380 }
 381
 382 static void wl1271_filter_work(struct work_struct *work)
 383 {
 384         struct wl1271 *wl =
 385                 container_of(work, struct wl1271, filter_work);
 386         int ret;
 387
 388         mutex_lock(&wl->mutex);
 389
 390         if (wl->state == WL1271_STATE_OFF)
 391                 goto out;
 392
 393         ret = wl1271_ps_elp_wakeup(wl, false);
 394         if (ret < 0)
 395                 goto out;
 396
 397         /* FIXME: replace the magic numbers with proper definitions */
 398         ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 399         if (ret < 0)
 400                 goto out_sleep;
 401
 402 out_sleep:
 403         wl1271_ps_elp_sleep(wl);
 404
 405 out:
 406         mutex_unlock(&wl->mutex);
 407 }
 408
 409 int wl1271_plt_start(struct wl1271 *wl)
 410 {
 411         int ret;
 412
 413         mutex_lock(&wl->mutex);
 414
 415         wl1271_notice("power up");
 416
 417         if (wl->state != WL1271_STATE_OFF) {
 418                 wl1271_error("cannot go into PLT state because not "
 419                              "in off state: %d", wl->state);
 420                 ret = -EBUSY;
 421                 goto out;
 422         }
 423
 424         wl->state = WL1271_STATE_PLT;
 425
 426         ret = wl1271_chip_wakeup(wl);
 427         if (ret < 0)
 428                 goto out;
 429
 430         ret = wl1271_boot(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         wl1271_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
 435
 436         ret = wl1271_plt_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440 out:
 441         mutex_unlock(&wl->mutex);
 442
 443         return ret;
 444 }
 445
 446 int wl1271_plt_stop(struct wl1271 *wl)
 447 {
 448         int ret = 0;
 449
 450         mutex_lock(&wl->mutex);
 451
 452         wl1271_notice("power down");
 453
 454         if (wl->state != WL1271_STATE_PLT) {
 455                 wl1271_error("cannot power down because not in PLT "
 456                              "state: %d", wl->state);
 457                 ret = -EBUSY;
 458                 goto out;
 459         }
 460
 461         wl1271_disable_interrupts(wl);
 462         wl1271_power_off(wl);
 463
 464         wl->state = WL1271_STATE_OFF;
 465
 466 out:
 467         mutex_unlock(&wl->mutex);
 468
 469         return ret;
 470 }
 471
 472
 473 static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 474 {
 475         struct wl1271 *wl = hw->priv;
 476
 477         skb_queue_tail(&wl->tx_queue, skb);
 478
 479         /*
 480          * The chip specific setup must run before the first TX packet -
 481          * before that, the tx_work will not be initialized!
 482          */
 483
 484         schedule_work(&wl->tx_work);
 485
 486         /*
 487          * The workqueue is slow to process the tx_queue and we need stop
 488          * the queue here, otherwise the queue will get too long.
 489          */
 490         if (skb_queue_len(&wl->tx_queue) >= WL1271_TX_QUEUE_MAX_LENGTH) {
 491                 ieee80211_stop_queues(wl->hw);
 492
 493                 /*
 494                  * FIXME: this is racy, the variable is not properly
 495                  * protected. Maybe fix this by removing the stupid
 496                  * variable altogether and checking the real queue state?
 497                  */
 498                 wl->tx_queue_stopped = true;
 499         }
 500
 501         return NETDEV_TX_OK;
 502 }
 503
 504 static int wl1271_op_start(struct ieee80211_hw *hw)
 505 {
 506         struct wl1271 *wl = hw->priv;
 507         int ret = 0;
 508
 509         wl1271_debug(DEBUG_MAC80211, "mac80211 start");
 510
 511         mutex_lock(&wl->mutex);
 512
 513         if (wl->state != WL1271_STATE_OFF) {
 514                 wl1271_error("cannot start because not in off state: %d",
 515                              wl->state);
 516                 ret = -EBUSY;
 517                 goto out;
 518         }
 519
 520         ret = wl1271_chip_wakeup(wl);
 521         if (ret < 0)
 522                 goto out;
 523
 524         ret = wl1271_boot(wl);
 525         if (ret < 0)
 526                 goto out;
 527
 528         ret = wl1271_hw_init(wl);
 529         if (ret < 0)
 530                 goto out;
 531
 532         wl->state = WL1271_STATE_ON;
 533
 534         wl1271_info("firmware booted (%s)", wl->chip.fw_ver);
 535
 536 out:
 537         if (ret < 0)
 538                 wl1271_power_off(wl);
 539
 540         mutex_unlock(&wl->mutex);
 541
 542         return ret;
 543 }
 544
 545 static void wl1271_op_stop(struct ieee80211_hw *hw)
 546 {
 547         struct wl1271 *wl = hw->priv;
 548         int i;
 549
 550         wl1271_info("down");
 551
 552         wl1271_debug(DEBUG_MAC80211, "mac80211 stop");
 553
 554         mutex_lock(&wl->mutex);
 555
 556         WARN_ON(wl->state != WL1271_STATE_ON);
 557
 558         if (wl->scanning) {
 559                 mutex_unlock(&wl->mutex);
 560                 ieee80211_scan_completed(wl->hw, true);
 561                 mutex_lock(&wl->mutex);
 562                 wl->scanning = false;
 563         }
 564
 565         wl->state = WL1271_STATE_OFF;
 566
 567         wl1271_disable_interrupts(wl);
 568
 569         mutex_unlock(&wl->mutex);
 570
 571         cancel_work_sync(&wl->irq_work);
 572         cancel_work_sync(&wl->tx_work);
 573         cancel_work_sync(&wl->filter_work);
 574
 575         mutex_lock(&wl->mutex);
 576
 577         /* let's notify MAC80211 about the remaining pending TX frames */
 578         wl1271_tx_flush(wl);
 579         wl1271_power_off(wl);
 580
 581         memset(wl->bssid, 0, ETH_ALEN);
 582         memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
 583         wl->ssid_len = 0;
 584         wl->listen_int = 1;
 585         wl->bss_type = MAX_BSS_TYPE;
 586
 587         wl->rx_counter = 0;
 588         wl->elp = false;
 589         wl->psm = 0;
 590         wl->tx_queue_stopped = false;
 591         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
 592         wl->tx_blocks_available = 0;
 593         wl->tx_results_count = 0;
 594         wl->tx_packets_count = 0;
 595         wl->time_offset = 0;
 596         wl->session_counter = 0;
 597         for (i = 0; i < NUM_TX_QUEUES; i++)
 598                 wl->tx_blocks_freed[i] = 0;
 599
 600         wl1271_debugfs_reset(wl);
 601         mutex_unlock(&wl->mutex);
 602 }
 603
 604 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 605                                    struct ieee80211_if_init_conf *conf)
 606 {
 607         struct wl1271 *wl = hw->priv;
 608         DECLARE_MAC_BUF(mac);
 609         int ret = 0;
 610
 611         wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %s",
 612                      conf->type, print_mac(mac, conf->mac_addr));
 613
 614         mutex_lock(&wl->mutex);
 615
 616         switch (conf->type) {
 617         case NL80211_IFTYPE_STATION:
 618                 wl->bss_type = BSS_TYPE_STA_BSS;
 619                 break;
 620         case NL80211_IFTYPE_ADHOC:
 621                 wl->bss_type = BSS_TYPE_IBSS;
 622                 break;
 623         default:
 624                 ret = -EOPNOTSUPP;
 625                 goto out;
 626         }
 627
 628         /* FIXME: what if conf->mac_addr changes? */
 629
 630 out:
 631         mutex_unlock(&wl->mutex);
 632         return ret;
 633 }
 634
 635 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
 636                                          struct ieee80211_if_init_conf *conf)
 637 {
 638         wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
 639 }
 640
 641 #if 0
 642 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
 643                                       struct ieee80211_vif *vif,
 644                                       struct ieee80211_if_conf *conf)
 645 {
 646         struct wl1271 *wl = hw->priv;
 647         struct sk_buff *beacon;
 648         DECLARE_MAC_BUF(mac);
 649         int ret;
 650
 651         wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %s",
 652                      print_mac(mac, conf->bssid));
 653         wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
 654                           conf->ssid_len);
 655
 656         mutex_lock(&wl->mutex);
 657
 658         ret = wl1271_ps_elp_wakeup(wl, false);
 659         if (ret < 0)
 660                 goto out;
 661
 662         memcpy(wl->bssid, conf->bssid, ETH_ALEN);
 663
 664         ret = wl1271_cmd_build_null_data(wl);
 665         if (ret < 0)
 666                 goto out_sleep;
 667
 668         wl->ssid_len = conf->ssid_len;
 669         if (wl->ssid_len)
 670                 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
 671
 672         if (wl->bss_type != BSS_TYPE_IBSS) {
 673                 /* FIXME: replace the magic numbers with proper definitions */
 674                 ret = wl1271_cmd_join(wl, wl->bss_type, 5, 100, 1);
 675                 if (ret < 0)
 676                         goto out_sleep;
 677         }
 678
 679         if (conf->changed & IEEE80211_IFCC_BEACON) {
 680                 beacon = ieee80211_beacon_get(hw, vif);
 681                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
 682                                               beacon->data, beacon->len);
 683
 684                 if (ret < 0) {
 685                         dev_kfree_skb(beacon);
 686                         goto out_sleep;
 687                 }
 688
 689                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
 690                                               beacon->data, beacon->len);
 691
 692                 dev_kfree_skb(beacon);
 693
 694                 if (ret < 0)
 695                         goto out_sleep;
 696
 697                 /* FIXME: replace the magic numbers with proper definitions */
 698                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 699
 700                 if (ret < 0)
 701                         goto out_sleep;
 702         }
 703
 704 out_sleep:
 705         wl1271_ps_elp_sleep(wl);
 706
 707 out:
 708         mutex_unlock(&wl->mutex);
 709
 710         return ret;
 711 }
 712 #endif
 713
 714 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
 715 {
 716         struct wl1271 *wl = hw->priv;
 717         struct ieee80211_conf *conf = &hw->conf;
 718         int channel, ret = 0;
 719
 720         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 721
 722         wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 723                      channel,
 724                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 725                      conf->power_level);
 726
 727         mutex_lock(&wl->mutex);
 728
 729         ret = wl1271_ps_elp_wakeup(wl, false);
 730         if (ret < 0)
 731                 goto out;
 732
 733         if (channel != wl->channel) {
 734                 u8 old_channel = wl->channel;
 735                 wl->channel = channel;
 736
 737                 /* FIXME: use beacon interval provided by mac80211 */
 738                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 739                 if (ret < 0) {
 740                         wl->channel = old_channel;
 741                         goto out_sleep;
 742                 }
 743         }
 744
 745         ret = wl1271_cmd_build_null_data(wl);
 746         if (ret < 0)
 747                 goto out_sleep;
 748
 749         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 750                 wl1271_info("psm enabled");
 751
 752                 wl->psm_requested = true;
 753
 754                 /*
 755                  * We enter PSM only if we're already associated.
 756                  * If we're not, we'll enter it when joining an SSID,
 757                  * through the bss_info_changed() hook.
 758                  */
 759                 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 760         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 761                    wl->psm_requested) {
 762                 wl1271_info("psm disabled");
 763
 764                 wl->psm_requested = false;
 765
 766                 if (wl->psm)
 767                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
 768         }
 769
 770         if (conf->power_level != wl->power_level) {
 771                 ret = wl1271_acx_tx_power(wl, conf->power_level);
 772                 if (ret < 0)
 773                         goto out;
 774
 775                 wl->power_level = conf->power_level;
 776         }
 777
 778 out_sleep:
 779         wl1271_ps_elp_sleep(wl);
 780
 781 out:
 782         mutex_unlock(&wl->mutex);
 783
 784         return ret;
 785 }
 786
 787 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 788                                   FIF_ALLMULTI | \
 789                                   FIF_FCSFAIL | \
 790                                   FIF_BCN_PRBRESP_PROMISC | \
 791                                   FIF_CONTROL | \
 792                                   FIF_OTHER_BSS)
 793
 794 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
 795                                        unsigned int changed,
 796                                        unsigned int *total,u64 multicast)
 797 {
 798         struct wl1271 *wl = hw->priv;
 799
 800         wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
 801
 802         *total &= WL1271_SUPPORTED_FILTERS;
 803         changed &= WL1271_SUPPORTED_FILTERS;
 804
 805         if (changed == 0)
 806                 return;
 807
 808         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 809         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
 810         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
 811
 812         /*
 813          * FIXME: workqueues need to be properly cancelled on stop(), for
 814          * now let's just disable changing the filter settings. They will
 815          * be updated any on config().
 816          */
 817         /* schedule_work(&wl->filter_work); */
 818 }
 819
 820 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 821                              struct ieee80211_vif *vif,
 822                              struct ieee80211_sta *sta,
 823                              struct ieee80211_key_conf *key_conf)
 824 {
 825         struct wl1271 *wl = hw->priv;
 826         const u8 *addr;
 827         int ret;
 828         u8 key_type;
 829
 830         static const u8 bcast_addr[ETH_ALEN] =
 831                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 832
 833         wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
 834
 835         addr = sta ? sta->addr : bcast_addr;
 836
 837         wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 838         wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 839         wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 840                      key_conf->alg, key_conf->keyidx,
 841                      key_conf->keylen, key_conf->flags);
 842         wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
 843
 844         if (is_zero_ether_addr(addr)) {
 845                 /* We dont support TX only encryption */
 846                 ret = -EOPNOTSUPP;
 847                 goto out;
 848         }
 849
 850         mutex_lock(&wl->mutex);
 851
 852         ret = wl1271_ps_elp_wakeup(wl, false);
 853         if (ret < 0)
 854                 goto out_unlock;
 855
 856         switch (key_conf->alg) {
 857         case ALG_WEP:
 858                 key_type = KEY_WEP;
 859
 860                 key_conf->hw_key_idx = key_conf->keyidx;
 861                 break;
 862         case ALG_TKIP:
 863                 key_type = KEY_TKIP;
 864
 865                 key_conf->hw_key_idx = key_conf->keyidx;
 866                 break;
 867         case ALG_CCMP:
 868                 key_type = KEY_AES;
 869
 870                 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 871                 break;
 872         default:
 873                 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
 874
 875                 ret = -EOPNOTSUPP;
 876                 goto out_sleep;
 877         }
 878
 879         switch (cmd) {
 880         case SET_KEY:
 881                 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
 882                                          key_conf->keyidx, key_type,
 883                                          key_conf->keylen, key_conf->key,
 884                                          addr);
 885                 if (ret < 0) {
 886                         wl1271_error("Could not add or replace key");
 887                         goto out_sleep;
 888                 }
 889                 break;
 890
 891         case DISABLE_KEY:
 892                 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
 893                                          key_conf->keyidx, key_type,
 894                                          key_conf->keylen, key_conf->key,
 895                                          addr);
 896                 if (ret < 0) {
 897                         wl1271_error("Could not remove key");
 898                         goto out_sleep;
 899                 }
 900                 break;
 901
 902         default:
 903                 wl1271_error("Unsupported key cmd 0x%x", cmd);
 904                 ret = -EOPNOTSUPP;
 905                 goto out_sleep;
 906
 907                 break;
 908         }
 909
 910 out_sleep:
 911         wl1271_ps_elp_sleep(wl);
 912
 913 out_unlock:
 914         mutex_unlock(&wl->mutex);
 915
 916 out:
 917         return ret;
 918 }
 919
 920 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
 921                              struct cfg80211_scan_request *req)
 922 {
 923         struct wl1271 *wl = hw->priv;
 924         int ret;
 925         u8 *ssid = NULL;
 926         size_t ssid_len = 0;
 927
 928         wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
 929
 930         if (req->n_ssids) {
 931                 ssid = req->ssids[0].ssid;
 932                 ssid_len = req->ssids[0].ssid_len;
 933         }
 934
 935         mutex_lock(&wl->mutex);
 936
 937         ret = wl1271_ps_elp_wakeup(wl, false);
 938         if (ret < 0)
 939                 goto out;
 940
 941         ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
 942
 943         wl1271_ps_elp_sleep(wl);
 944
 945 out:
 946         mutex_unlock(&wl->mutex);
 947
 948         return ret;
 949 }
 950
 951 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 952 {
 953         struct wl1271 *wl = hw->priv;
 954         int ret;
 955
 956         mutex_lock(&wl->mutex);
 957
 958         ret = wl1271_ps_elp_wakeup(wl, false);
 959         if (ret < 0)
 960                 goto out;
 961
 962         ret = wl1271_acx_rts_threshold(wl, (u16) value);
 963         if (ret < 0)
 964                 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
 965
 966         wl1271_ps_elp_sleep(wl);
 967
 968 out:
 969         mutex_unlock(&wl->mutex);
 970
 971         return ret;
 972 }
 973
 974 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
 975                                        struct ieee80211_vif *vif,
 976                                        struct ieee80211_bss_conf *bss_conf,
 977                                        u32 changed)
 978 {
 979         enum wl1271_cmd_ps_mode mode;
 980         struct wl1271 *wl = hw->priv;
 981         int ret;
 982
 983         wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 984
 985         mutex_lock(&wl->mutex);
 986
 987         ret = wl1271_ps_elp_wakeup(wl, false);
 988         if (ret < 0)
 989                 goto out;
 990
 991         if (changed & BSS_CHANGED_ASSOC) {
 992                 if (bss_conf->assoc) {
 993                         wl->aid = bss_conf->aid;
 994
 995                         ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
 996                         if (ret < 0)
 997                                 goto out_sleep;
 998
 999                         ret = wl1271_acx_aid(wl, wl->aid);
1000                         if (ret < 0)
1001                                 goto out_sleep;
1002
1003                         /* If we want to go in PSM but we're not there yet */
1004                         if (wl->psm_requested && !wl->psm) {
1005                                 mode = STATION_POWER_SAVE_MODE;
1006                                 ret = wl1271_ps_set_mode(wl, mode);
1007                                 if (ret < 0)
1008                                         goto out_sleep;
1009                         }
1010                 }
1011         }
1012         if (changed & BSS_CHANGED_ERP_SLOT) {
1013                 if (bss_conf->use_short_slot)
1014                         ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1015                 else
1016                         ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1017                 if (ret < 0) {
1018                         wl1271_warning("Set slot time failed %d", ret);
1019                         goto out_sleep;
1020                 }
1021         }
1022
1023         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1024                 if (bss_conf->use_short_preamble)
1025                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1026                 else
1027                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1028         }
1029
1030         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1031                 if (bss_conf->use_cts_prot)
1032                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1033                 else
1034                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1035                 if (ret < 0) {
1036                         wl1271_warning("Set ctsprotect failed %d", ret);
1037                         goto out_sleep;
1038                 }
1039         }
1040
1041 out_sleep:
1042         wl1271_ps_elp_sleep(wl);
1043
1044 out:
1045         mutex_unlock(&wl->mutex);
1046 }
1047
1048
1049 /* can't be const, mac80211 writes to this */
1050 static struct ieee80211_rate wl1271_rates[] = {
1051         { .bitrate = 10,
1052           .hw_value = 0x1,
1053           .hw_value_short = 0x1, },
1054         { .bitrate = 20,
1055           .hw_value = 0x2,
1056           .hw_value_short = 0x2,
1057           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1058         { .bitrate = 55,
1059           .hw_value = 0x4,
1060           .hw_value_short = 0x4,
1061           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1062         { .bitrate = 110,
1063           .hw_value = 0x20,
1064           .hw_value_short = 0x20,
1065           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1066         { .bitrate = 60,
1067           .hw_value = 0x8,
1068           .hw_value_short = 0x8, },
1069         { .bitrate = 90,
1070           .hw_value = 0x10,
1071           .hw_value_short = 0x10, },
1072         { .bitrate = 120,
1073           .hw_value = 0x40,
1074           .hw_value_short = 0x40, },
1075         { .bitrate = 180,
1076           .hw_value = 0x80,
1077           .hw_value_short = 0x80, },
1078         { .bitrate = 240,
1079           .hw_value = 0x200,
1080           .hw_value_short = 0x200, },
1081         { .bitrate = 360,
1082          .hw_value = 0x400,
1083          .hw_value_short = 0x400, },
1084         { .bitrate = 480,
1085           .hw_value = 0x800,
1086           .hw_value_short = 0x800, },
1087         { .bitrate = 540,
1088           .hw_value = 0x1000,
1089           .hw_value_short = 0x1000, },
1090 };
1091
1092 /* can't be const, mac80211 writes to this */
1093 static struct ieee80211_channel wl1271_channels[] = {
1094         { .hw_value = 1, .center_freq = 2412},
1095         { .hw_value = 2, .center_freq = 2417},
1096         { .hw_value = 3, .center_freq = 2422},
1097         { .hw_value = 4, .center_freq = 2427},
1098         { .hw_value = 5, .center_freq = 2432},
1099         { .hw_value = 6, .center_freq = 2437},
1100         { .hw_value = 7, .center_freq = 2442},
1101         { .hw_value = 8, .center_freq = 2447},
1102         { .hw_value = 9, .center_freq = 2452},
1103         { .hw_value = 10, .center_freq = 2457},
1104         { .hw_value = 11, .center_freq = 2462},
1105         { .hw_value = 12, .center_freq = 2467},
1106         { .hw_value = 13, .center_freq = 2472},
1107 };
1108
1109 /* can't be const, mac80211 writes to this */
1110 static struct ieee80211_supported_band wl1271_band_2ghz = {
1111         .channels = wl1271_channels,
1112         .n_channels = ARRAY_SIZE(wl1271_channels),
1113         .bitrates = wl1271_rates,
1114         .n_bitrates = ARRAY_SIZE(wl1271_rates),
1115 };
1116
1117 static const struct ieee80211_ops wl1271_ops = {
1118         .start = wl1271_op_start,
1119         .stop = wl1271_op_stop,
1120         .add_interface = wl1271_op_add_interface,
1121         .remove_interface = wl1271_op_remove_interface,
1122         .config = wl1271_op_config,
1123 /*      .config_interface = wl1271_op_config_interface, */
1124         .configure_filter = wl1271_op_configure_filter,
1125         .tx = wl1271_op_tx,
1126         .set_key = wl1271_op_set_key,
1127         .hw_scan = wl1271_op_hw_scan,
1128         .bss_info_changed = wl1271_op_bss_info_changed,
1129         .set_rts_threshold = wl1271_op_set_rts_threshold,
1130 };
1131
1132 static int wl1271_register_hw(struct wl1271 *wl)
1133 {
1134         int ret;
1135
1136         if (wl->mac80211_registered)
1137                 return 0;
1138
1139         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1140
1141         ret = ieee80211_register_hw(wl->hw);
1142         if (ret < 0) {
1143                 wl1271_error("unable to register mac80211 hw: %d", ret);
1144                 return ret;
1145         }
1146
1147         wl->mac80211_registered = true;
1148
1149         wl1271_notice("loaded");
1150
1151         return 0;
1152 }
1153
1154 static int wl1271_init_ieee80211(struct wl1271 *wl)
1155 {
1156         /*
1157          * The tx descriptor buffer and the TKIP space.
1158          *
1159          * FIXME: add correct 1271 descriptor size
1160          */
1161         wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE;
1162
1163         /* unit us */
1164         /* FIXME: find a proper value */
1165         wl->hw->channel_change_time = 10000;
1166
1167         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1168                 IEEE80211_HW_NOISE_DBM;
1169
1170         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1171         wl->hw->wiphy->max_scan_ssids = 1;
1172         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1173
1174         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1175
1176         return 0;
1177 }
1178
1179 static void wl1271_device_release(struct device *dev)
1180 {
1181
1182 }
1183
1184 static struct platform_device wl1271_device = {
1185         .name           = "wl1271",
1186         .id             = -1,
1187
1188         /* device model insists to have a release function */
1189         .dev            = {
1190                 .release = wl1271_device_release,
1191         },
1192 };
1193
1194 #define WL1271_DEFAULT_CHANNEL 0
1195 static int __devinit wl1271_probe(struct spi_device *spi)
1196 {
1197         struct wl12xx_platform_data *pdata;
1198         struct ieee80211_hw *hw;
1199         struct wl1271 *wl;
1200         int ret, i;
1201         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1202
1203         pdata = spi->dev.platform_data;
1204         if (!pdata) {
1205                 wl1271_error("no platform data");
1206                 return -ENODEV;
1207         }
1208
1209         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1210         if (!hw) {
1211                 wl1271_error("could not alloc ieee80211_hw");
1212                 return -ENOMEM;
1213         }
1214
1215         wl = hw->priv;
1216         memset(wl, 0, sizeof(*wl));
1217
1218         wl->hw = hw;
1219         dev_set_drvdata(&spi->dev, wl);
1220         wl->spi = spi;
1221
1222         skb_queue_head_init(&wl->tx_queue);
1223
1224         INIT_WORK(&wl->filter_work, wl1271_filter_work);
1225         wl->channel = WL1271_DEFAULT_CHANNEL;
1226         wl->scanning = false;
1227         wl->default_key = 0;
1228         wl->listen_int = 1;
1229         wl->rx_counter = 0;
1230         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1231         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1232         wl->elp = false;
1233         wl->psm = 0;
1234         wl->psm_requested = false;
1235         wl->tx_queue_stopped = false;
1236         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1237
1238         /* We use the default power on sleep time until we know which chip
1239          * we're using */
1240         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1241                 wl->tx_frames[i] = NULL;
1242
1243         spin_lock_init(&wl->wl_lock);
1244
1245         /*
1246          * In case our MAC address is not correctly set,
1247          * we use a random but Nokia MAC.
1248          */
1249         memcpy(wl->mac_addr, nokia_oui, 3);
1250         get_random_bytes(wl->mac_addr + 3, 3);
1251
1252         wl->state = WL1271_STATE_OFF;
1253         mutex_init(&wl->mutex);
1254
1255         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1256         if (!wl->rx_descriptor) {
1257                 wl1271_error("could not allocate memory for rx descriptor");
1258                 ret = -ENOMEM;
1259                 goto out_free;
1260         }
1261
1262         /* This is the only SPI value that we need to set here, the rest
1263          * comes from the board-peripherals file */
1264         spi->bits_per_word = 32;
1265
1266         ret = spi_setup(spi);
1267         if (ret < 0) {
1268                 wl1271_error("spi_setup failed");
1269                 goto out_free;
1270         }
1271
1272         wl->set_power = pdata->set_power;
1273         if (!wl->set_power) {
1274                 wl1271_error("set power function missing in platform data");
1275                 ret = -ENODEV;
1276                 goto out_free;
1277         }
1278
1279         wl->irq = spi->irq;
1280         if (wl->irq < 0) {
1281                 wl1271_error("irq missing in platform data");
1282                 ret = -ENODEV;
1283                 goto out_free;
1284         }
1285
1286         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1287         if (ret < 0) {
1288                 wl1271_error("request_irq() failed: %d", ret);
1289                 goto out_free;
1290         }
1291
1292         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1293
1294         disable_irq(wl->irq);
1295
1296         ret = platform_device_register(&wl1271_device);
1297         if (ret) {
1298                 wl1271_error("couldn't register platform device");
1299                 goto out_irq;
1300         }
1301         dev_set_drvdata(&wl1271_device.dev, wl);
1302
1303         ret = wl1271_init_ieee80211(wl);
1304         if (ret)
1305                 goto out_platform;
1306
1307         ret = wl1271_register_hw(wl);
1308         if (ret)
1309                 goto out_platform;
1310
1311         wl1271_debugfs_init(wl);
1312
1313         wl1271_notice("initialized");
1314
1315         return 0;
1316
1317  out_platform:
1318         platform_device_unregister(&wl1271_device);
1319
1320  out_irq:
1321         free_irq(wl->irq, wl);
1322
1323  out_free:
1324         kfree(wl->rx_descriptor);
1325         wl->rx_descriptor = NULL;
1326
1327         ieee80211_free_hw(hw);
1328
1329         return ret;
1330 }
1331
1332 static int __devexit wl1271_remove(struct spi_device *spi)
1333 {
1334         struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1335
1336         ieee80211_unregister_hw(wl->hw);
1337
1338         wl1271_debugfs_exit(wl);
1339         platform_device_unregister(&wl1271_device);
1340         free_irq(wl->irq, wl);
1341         kfree(wl->target_mem_map);
1342         kfree(wl->fw);
1343         wl->fw = NULL;
1344         kfree(wl->nvs);
1345         wl->nvs = NULL;
1346
1347         kfree(wl->rx_descriptor);
1348         wl->rx_descriptor = NULL;
1349
1350         kfree(wl->fw_status);
1351         kfree(wl->tx_res_if);
1352
1353         ieee80211_free_hw(wl->hw);
1354
1355         return 0;
1356 }
1357
1358
1359 static struct spi_driver wl1271_spi_driver = {
1360         .driver = {
1361                 .name           = "wl1271",
1362                 .bus            = &spi_bus_type,
1363                 .owner          = THIS_MODULE,
1364         },
1365
1366         .probe          = wl1271_probe,
1367         .remove         = __devexit_p(wl1271_remove),
1368 };
1369
1370 static int __init wl1271_init(void)
1371 {
1372         int ret;
1373
1374         ret = spi_register_driver(&wl1271_spi_driver);
1375         if (ret < 0) {
1376                 wl1271_error("failed to register spi driver: %d", ret);
1377                 goto out;
1378         }
1379
1380 out:
1381         return ret;
1382 }
1383
1384 static void __exit wl1271_exit(void)
1385 {
1386         spi_unregister_driver(&wl1271_spi_driver);
1387
1388         wl1271_notice("unloaded");
1389 }
1390
1391 module_init(wl1271_init);
1392 module_exit(wl1271_exit);
1393
1394 MODULE_LICENSE("GPL");
1395 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");