drivers/net/wireless/ath/ath10k/core.c

   1 /*
   2  * Copyright (c) 2005-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/firmware.h>
  20
  21 #include "core.h"
  22 #include "mac.h"
  23 #include "htc.h"
  24 #include "hif.h"
  25 #include "wmi.h"
  26 #include "bmi.h"
  27 #include "debug.h"
  28 #include "htt.h"
  29
  30 unsigned int ath10k_debug_mask;
  31 static bool uart_print;
  32 static unsigned int ath10k_p2p;
  33 module_param_named(debug_mask, ath10k_debug_mask, uint, 0644);
  34 module_param(uart_print, bool, 0644);
  35 module_param_named(p2p, ath10k_p2p, uint, 0644);
  36 MODULE_PARM_DESC(debug_mask, "Debugging mask");
  37 MODULE_PARM_DESC(uart_print, "Uart target debugging");
  38 MODULE_PARM_DESC(p2p, "Enable ath10k P2P support");
  39
  40 static const struct ath10k_hw_params ath10k_hw_params_list[] = {
  41         {
  42                 .id = QCA988X_HW_2_0_VERSION,
  43                 .name = "qca988x hw2.0",
  44                 .patch_load_addr = QCA988X_HW_2_0_PATCH_LOAD_ADDR,
  45                 .fw = {
  46                         .dir = QCA988X_HW_2_0_FW_DIR,
  47                         .fw = QCA988X_HW_2_0_FW_FILE,
  48                         .otp = QCA988X_HW_2_0_OTP_FILE,
  49                         .board = QCA988X_HW_2_0_BOARD_DATA_FILE,
  50                 },
  51         },
  52 };
  53
  54 static void ath10k_send_suspend_complete(struct ath10k *ar)
  55 {
  56         ath10k_dbg(ATH10K_DBG_BOOT, "boot suspend complete\n");
  57
  58         complete(&ar->target_suspend);
  59 }
  60
  61 static int ath10k_init_configure_target(struct ath10k *ar)
  62 {
  63         u32 param_host;
  64         int ret;
  65
  66         /* tell target which HTC version it is used*/
  67         ret = ath10k_bmi_write32(ar, hi_app_host_interest,
  68                                  HTC_PROTOCOL_VERSION);
  69         if (ret) {
  70                 ath10k_err("settings HTC version failed\n");
  71                 return ret;
  72         }
  73
  74         /* set the firmware mode to STA/IBSS/AP */
  75         ret = ath10k_bmi_read32(ar, hi_option_flag, &param_host);
  76         if (ret) {
  77                 ath10k_err("setting firmware mode (1/2) failed\n");
  78                 return ret;
  79         }
  80
  81         /* TODO following parameters need to be re-visited. */
  82         /* num_device */
  83         param_host |= (1 << HI_OPTION_NUM_DEV_SHIFT);
  84         /* Firmware mode */
  85         /* FIXME: Why FW_MODE_AP ??.*/
  86         param_host |= (HI_OPTION_FW_MODE_AP << HI_OPTION_FW_MODE_SHIFT);
  87         /* mac_addr_method */
  88         param_host |= (1 << HI_OPTION_MAC_ADDR_METHOD_SHIFT);
  89         /* firmware_bridge */
  90         param_host |= (0 << HI_OPTION_FW_BRIDGE_SHIFT);
  91         /* fwsubmode */
  92         param_host |= (0 << HI_OPTION_FW_SUBMODE_SHIFT);
  93
  94         ret = ath10k_bmi_write32(ar, hi_option_flag, param_host);
  95         if (ret) {
  96                 ath10k_err("setting firmware mode (2/2) failed\n");
  97                 return ret;
  98         }
  99
 100         /* We do all byte-swapping on the host */
 101         ret = ath10k_bmi_write32(ar, hi_be, 0);
 102         if (ret) {
 103                 ath10k_err("setting host CPU BE mode failed\n");
 104                 return ret;
 105         }
 106
 107         /* FW descriptor/Data swap flags */
 108         ret = ath10k_bmi_write32(ar, hi_fw_swap, 0);
 109
 110         if (ret) {
 111                 ath10k_err("setting FW data/desc swap flags failed\n");
 112                 return ret;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static const struct firmware *ath10k_fetch_fw_file(struct ath10k *ar,
 119                                                    const char *dir,
 120                                                    const char *file)
 121 {
 122         char filename[100];
 123         const struct firmware *fw;
 124         int ret;
 125
 126         if (file == NULL)
 127                 return ERR_PTR(-ENOENT);
 128
 129         if (dir == NULL)
 130                 dir = ".";
 131
 132         snprintf(filename, sizeof(filename), "%s/%s", dir, file);
 133         ret = request_firmware(&fw, filename, ar->dev);
 134         if (ret)
 135                 return ERR_PTR(ret);
 136
 137         return fw;
 138 }
 139
 140 static int ath10k_push_board_ext_data(struct ath10k *ar)
 141 {
 142         u32 board_data_size = QCA988X_BOARD_DATA_SZ;
 143         u32 board_ext_data_size = QCA988X_BOARD_EXT_DATA_SZ;
 144         u32 board_ext_data_addr;
 145         int ret;
 146
 147         ret = ath10k_bmi_read32(ar, hi_board_ext_data, &board_ext_data_addr);
 148         if (ret) {
 149                 ath10k_err("could not read board ext data addr (%d)\n", ret);
 150                 return ret;
 151         }
 152
 153         ath10k_dbg(ATH10K_DBG_BOOT,
 154                    "boot push board extended data addr 0x%x\n",
 155                    board_ext_data_addr);
 156
 157         if (board_ext_data_addr == 0)
 158                 return 0;
 159
 160         if (ar->board_len != (board_data_size + board_ext_data_size)) {
 161                 ath10k_err("invalid board (ext) data sizes %zu != %d+%d\n",
 162                            ar->board_len, board_data_size, board_ext_data_size);
 163                 return -EINVAL;
 164         }
 165
 166         ret = ath10k_bmi_write_memory(ar, board_ext_data_addr,
 167                                       ar->board_data + board_data_size,
 168                                       board_ext_data_size);
 169         if (ret) {
 170                 ath10k_err("could not write board ext data (%d)\n", ret);
 171                 return ret;
 172         }
 173
 174         ret = ath10k_bmi_write32(ar, hi_board_ext_data_config,
 175                                  (board_ext_data_size << 16) | 1);
 176         if (ret) {
 177                 ath10k_err("could not write board ext data bit (%d)\n", ret);
 178                 return ret;
 179         }
 180
 181         return 0;
 182 }
 183
 184 static int ath10k_download_board_data(struct ath10k *ar)
 185 {
 186         u32 board_data_size = QCA988X_BOARD_DATA_SZ;
 187         u32 address;
 188         int ret;
 189
 190         ret = ath10k_push_board_ext_data(ar);
 191         if (ret) {
 192                 ath10k_err("could not push board ext data (%d)\n", ret);
 193                 goto exit;
 194         }
 195
 196         ret = ath10k_bmi_read32(ar, hi_board_data, &address);
 197         if (ret) {
 198                 ath10k_err("could not read board data addr (%d)\n", ret);
 199                 goto exit;
 200         }
 201
 202         ret = ath10k_bmi_write_memory(ar, address, ar->board_data,
 203                                       min_t(u32, board_data_size,
 204                                             ar->board_len));
 205         if (ret) {
 206                 ath10k_err("could not write board data (%d)\n", ret);
 207                 goto exit;
 208         }
 209
 210         ret = ath10k_bmi_write32(ar, hi_board_data_initialized, 1);
 211         if (ret) {
 212                 ath10k_err("could not write board data bit (%d)\n", ret);
 213                 goto exit;
 214         }
 215
 216 exit:
 217         return ret;
 218 }
 219
 220 static int ath10k_download_and_run_otp(struct ath10k *ar)
 221 {
 222         u32 result, address = ar->hw_params.patch_load_addr;
 223         int ret;
 224
 225         /* OTP is optional */
 226
 227         if (!ar->otp_data || !ar->otp_len) {
 228                 ath10k_warn("Not running otp, calibration will be incorrect (otp-data %p otp_len %zd)!\n",
 229                             ar->otp_data, ar->otp_len);
 230                 return 0;
 231         }
 232
 233         ath10k_dbg(ATH10K_DBG_BOOT, "boot upload otp to 0x%x len %zd\n",
 234                    address, ar->otp_len);
 235
 236         ret = ath10k_bmi_fast_download(ar, address, ar->otp_data, ar->otp_len);
 237         if (ret) {
 238                 ath10k_err("could not write otp (%d)\n", ret);
 239                 return ret;
 240         }
 241
 242         ret = ath10k_bmi_execute(ar, address, 0, &result);
 243         if (ret) {
 244                 ath10k_err("could not execute otp (%d)\n", ret);
 245                 return ret;
 246         }
 247
 248         ath10k_dbg(ATH10K_DBG_BOOT, "boot otp execute result %d\n", result);
 249
 250         if (result != 0) {
 251                 ath10k_err("otp calibration failed: %d", result);
 252                 return -EINVAL;
 253         }
 254
 255         return 0;
 256 }
 257
 258 static int ath10k_download_fw(struct ath10k *ar)
 259 {
 260         u32 address;
 261         int ret;
 262
 263         address = ar->hw_params.patch_load_addr;
 264
 265         ret = ath10k_bmi_fast_download(ar, address, ar->firmware_data,
 266                                        ar->firmware_len);
 267         if (ret) {
 268                 ath10k_err("could not write fw (%d)\n", ret);
 269                 goto exit;
 270         }
 271
 272 exit:
 273         return ret;
 274 }
 275
 276 static void ath10k_core_free_firmware_files(struct ath10k *ar)
 277 {
 278         if (ar->board && !IS_ERR(ar->board))
 279                 release_firmware(ar->board);
 280
 281         if (ar->otp && !IS_ERR(ar->otp))
 282                 release_firmware(ar->otp);
 283
 284         if (ar->firmware && !IS_ERR(ar->firmware))
 285                 release_firmware(ar->firmware);
 286
 287         ar->board = NULL;
 288         ar->board_data = NULL;
 289         ar->board_len = 0;
 290
 291         ar->otp = NULL;
 292         ar->otp_data = NULL;
 293         ar->otp_len = 0;
 294
 295         ar->firmware = NULL;
 296         ar->firmware_data = NULL;
 297         ar->firmware_len = 0;
 298 }
 299
 300 static int ath10k_core_fetch_firmware_api_1(struct ath10k *ar)
 301 {
 302         int ret = 0;
 303
 304         if (ar->hw_params.fw.fw == NULL) {
 305                 ath10k_err("firmware file not defined\n");
 306                 return -EINVAL;
 307         }
 308
 309         if (ar->hw_params.fw.board == NULL) {
 310                 ath10k_err("board data file not defined");
 311                 return -EINVAL;
 312         }
 313
 314         ar->board = ath10k_fetch_fw_file(ar,
 315                                          ar->hw_params.fw.dir,
 316                                          ar->hw_params.fw.board);
 317         if (IS_ERR(ar->board)) {
 318                 ret = PTR_ERR(ar->board);
 319                 ath10k_err("could not fetch board data (%d)\n", ret);
 320                 goto err;
 321         }
 322
 323         ar->board_data = ar->board->data;
 324         ar->board_len = ar->board->size;
 325
 326         ar->firmware = ath10k_fetch_fw_file(ar,
 327                                             ar->hw_params.fw.dir,
 328                                             ar->hw_params.fw.fw);
 329         if (IS_ERR(ar->firmware)) {
 330                 ret = PTR_ERR(ar->firmware);
 331                 ath10k_err("could not fetch firmware (%d)\n", ret);
 332                 goto err;
 333         }
 334
 335         ar->firmware_data = ar->firmware->data;
 336         ar->firmware_len = ar->firmware->size;
 337
 338         /* OTP may be undefined. If so, don't fetch it at all */
 339         if (ar->hw_params.fw.otp == NULL)
 340                 return 0;
 341
 342         ar->otp = ath10k_fetch_fw_file(ar,
 343                                        ar->hw_params.fw.dir,
 344                                        ar->hw_params.fw.otp);
 345         if (IS_ERR(ar->otp)) {
 346                 ret = PTR_ERR(ar->otp);
 347                 ath10k_err("could not fetch otp (%d)\n", ret);
 348                 goto err;
 349         }
 350
 351         ar->otp_data = ar->otp->data;
 352         ar->otp_len = ar->otp->size;
 353
 354         return 0;
 355
 356 err:
 357         ath10k_core_free_firmware_files(ar);
 358         return ret;
 359 }
 360
 361 static int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name)
 362 {
 363         size_t magic_len, len, ie_len;
 364         int ie_id, i, index, bit, ret;
 365         struct ath10k_fw_ie *hdr;
 366         const u8 *data;
 367         __le32 *timestamp;
 368
 369         /* first fetch the firmware file (firmware-*.bin) */
 370         ar->firmware = ath10k_fetch_fw_file(ar, ar->hw_params.fw.dir, name);
 371         if (IS_ERR(ar->firmware)) {
 372                 ath10k_err("could not fetch firmware file '%s/%s': %ld\n",
 373                            ar->hw_params.fw.dir, name, PTR_ERR(ar->firmware));
 374                 return PTR_ERR(ar->firmware);
 375         }
 376
 377         data = ar->firmware->data;
 378         len = ar->firmware->size;
 379
 380         /* magic also includes the null byte, check that as well */
 381         magic_len = strlen(ATH10K_FIRMWARE_MAGIC) + 1;
 382
 383         if (len < magic_len) {
 384                 ath10k_err("firmware file '%s/%s' too small to contain magic: %zu\n",
 385                            ar->hw_params.fw.dir, name, len);
 386                 ret = -EINVAL;
 387                 goto err;
 388         }
 389
 390         if (memcmp(data, ATH10K_FIRMWARE_MAGIC, magic_len) != 0) {
 391                 ath10k_err("invalid firmware magic\n");
 392                 ret = -EINVAL;
 393                 goto err;
 394         }
 395
 396         /* jump over the padding */
 397         magic_len = ALIGN(magic_len, 4);
 398
 399         len -= magic_len;
 400         data += magic_len;
 401
 402         /* loop elements */
 403         while (len > sizeof(struct ath10k_fw_ie)) {
 404                 hdr = (struct ath10k_fw_ie *)data;
 405
 406                 ie_id = le32_to_cpu(hdr->id);
 407                 ie_len = le32_to_cpu(hdr->len);
 408
 409                 len -= sizeof(*hdr);
 410                 data += sizeof(*hdr);
 411
 412                 if (len < ie_len) {
 413                         ath10k_err("invalid length for FW IE %d (%zu < %zu)\n",
 414                                    ie_id, len, ie_len);
 415                         ret = -EINVAL;
 416                         goto err;
 417                 }
 418
 419                 switch (ie_id) {
 420                 case ATH10K_FW_IE_FW_VERSION:
 421                         if (ie_len > sizeof(ar->hw->wiphy->fw_version) - 1)
 422                                 break;
 423
 424                         memcpy(ar->hw->wiphy->fw_version, data, ie_len);
 425                         ar->hw->wiphy->fw_version[ie_len] = '\0';
 426
 427                         ath10k_dbg(ATH10K_DBG_BOOT,
 428                                    "found fw version %s\n",
 429                                     ar->hw->wiphy->fw_version);
 430                         break;
 431                 case ATH10K_FW_IE_TIMESTAMP:
 432                         if (ie_len != sizeof(u32))
 433                                 break;
 434
 435                         timestamp = (__le32 *)data;
 436
 437                         ath10k_dbg(ATH10K_DBG_BOOT, "found fw timestamp %d\n",
 438                                    le32_to_cpup(timestamp));
 439                         break;
 440                 case ATH10K_FW_IE_FEATURES:
 441                         ath10k_dbg(ATH10K_DBG_BOOT,
 442                                    "found firmware features ie (%zd B)\n",
 443                                    ie_len);
 444
 445                         for (i = 0; i < ATH10K_FW_FEATURE_COUNT; i++) {
 446                                 index = i / 8;
 447                                 bit = i % 8;
 448
 449                                 if (index == ie_len)
 450                                         break;
 451
 452                                 if (data[index] & (1 << bit)) {
 453                                         ath10k_dbg(ATH10K_DBG_BOOT,
 454                                                    "Enabling feature bit: %i\n",
 455                                                    i);
 456                                         __set_bit(i, ar->fw_features);
 457                                 }
 458                         }
 459
 460                         ath10k_dbg_dump(ATH10K_DBG_BOOT, "features", "",
 461                                         ar->fw_features,
 462                                         sizeof(ar->fw_features));
 463                         break;
 464                 case ATH10K_FW_IE_FW_IMAGE:
 465                         ath10k_dbg(ATH10K_DBG_BOOT,
 466                                    "found fw image ie (%zd B)\n",
 467                                    ie_len);
 468
 469                         ar->firmware_data = data;
 470                         ar->firmware_len = ie_len;
 471
 472                         break;
 473                 case ATH10K_FW_IE_OTP_IMAGE:
 474                         ath10k_dbg(ATH10K_DBG_BOOT,
 475                                    "found otp image ie (%zd B)\n",
 476                                    ie_len);
 477
 478                         ar->otp_data = data;
 479                         ar->otp_len = ie_len;
 480
 481                         break;
 482                 default:
 483                         ath10k_warn("Unknown FW IE: %u\n",
 484                                     le32_to_cpu(hdr->id));
 485                         break;
 486                 }
 487
 488                 /* jump over the padding */
 489                 ie_len = ALIGN(ie_len, 4);
 490
 491                 len -= ie_len;
 492                 data += ie_len;
 493         }
 494
 495         if (!ar->firmware_data || !ar->firmware_len) {
 496                 ath10k_warn("No ATH10K_FW_IE_FW_IMAGE found from '%s/%s', skipping\n",
 497                             ar->hw_params.fw.dir, name);
 498                 ret = -ENOMEDIUM;
 499                 goto err;
 500         }
 501
 502         if (test_bit(ATH10K_FW_FEATURE_WMI_10_2, ar->fw_features) &&
 503             !test_bit(ATH10K_FW_FEATURE_WMI_10X, ar->fw_features)) {
 504                 ath10k_err("feature bits corrupted: 10.2 feature requires 10.x feature to be set as well");
 505                 ret = -EINVAL;
 506                 goto err;
 507         }
 508
 509         /* now fetch the board file */
 510         if (ar->hw_params.fw.board == NULL) {
 511                 ath10k_err("board data file not defined");
 512                 ret = -EINVAL;
 513                 goto err;
 514         }
 515
 516         ar->board = ath10k_fetch_fw_file(ar,
 517                                          ar->hw_params.fw.dir,
 518                                          ar->hw_params.fw.board);
 519         if (IS_ERR(ar->board)) {
 520                 ret = PTR_ERR(ar->board);
 521                 ath10k_err("could not fetch board data '%s/%s' (%d)\n",
 522                            ar->hw_params.fw.dir, ar->hw_params.fw.board,
 523                            ret);
 524                 goto err;
 525         }
 526
 527         ar->board_data = ar->board->data;
 528         ar->board_len = ar->board->size;
 529
 530         return 0;
 531
 532 err:
 533         ath10k_core_free_firmware_files(ar);
 534         return ret;
 535 }
 536
 537 static int ath10k_core_fetch_firmware_files(struct ath10k *ar)
 538 {
 539         int ret;
 540
 541         ar->fw_api = 3;
 542         ath10k_dbg(ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
 543
 544         ret = ath10k_core_fetch_firmware_api_n(ar, ATH10K_FW_API3_FILE);
 545         if (ret == 0)
 546                 goto success;
 547
 548         ar->fw_api = 2;
 549         ath10k_dbg(ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
 550
 551         ret = ath10k_core_fetch_firmware_api_n(ar, ATH10K_FW_API2_FILE);
 552         if (ret == 0)
 553                 goto success;
 554
 555         ar->fw_api = 1;
 556         ath10k_dbg(ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
 557
 558         ret = ath10k_core_fetch_firmware_api_1(ar);
 559         if (ret)
 560                 return ret;
 561
 562 success:
 563         ath10k_dbg(ATH10K_DBG_BOOT, "using fw api %d\n", ar->fw_api);
 564
 565         return 0;
 566 }
 567
 568 static int ath10k_init_download_firmware(struct ath10k *ar)
 569 {
 570         int ret;
 571
 572         ret = ath10k_download_board_data(ar);
 573         if (ret) {
 574                 ath10k_err("failed to download board data: %d\n", ret);
 575                 return ret;
 576         }
 577
 578         ret = ath10k_download_and_run_otp(ar);
 579         if (ret) {
 580                 ath10k_err("failed to run otp: %d\n", ret);
 581                 return ret;
 582         }
 583
 584         ret = ath10k_download_fw(ar);
 585         if (ret) {
 586                 ath10k_err("failed to download firmware: %d\n", ret);
 587                 return ret;
 588         }
 589
 590         return ret;
 591 }
 592
 593 static int ath10k_init_uart(struct ath10k *ar)
 594 {
 595         int ret;
 596
 597         /*
 598          * Explicitly setting UART prints to zero as target turns it on
 599          * based on scratch registers.
 600          */
 601         ret = ath10k_bmi_write32(ar, hi_serial_enable, 0);
 602         if (ret) {
 603                 ath10k_warn("could not disable UART prints (%d)\n", ret);
 604                 return ret;
 605         }
 606
 607         if (!uart_print)
 608                 return 0;
 609
 610         ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin, 7);
 611         if (ret) {
 612                 ath10k_warn("could not enable UART prints (%d)\n", ret);
 613                 return ret;
 614         }
 615
 616         ret = ath10k_bmi_write32(ar, hi_serial_enable, 1);
 617         if (ret) {
 618                 ath10k_warn("could not enable UART prints (%d)\n", ret);
 619                 return ret;
 620         }
 621
 622         /* Set the UART baud rate to 19200. */
 623         ret = ath10k_bmi_write32(ar, hi_desired_baud_rate, 19200);
 624         if (ret) {
 625                 ath10k_warn("could not set the baud rate (%d)\n", ret);
 626                 return ret;
 627         }
 628
 629         ath10k_info("UART prints enabled\n");
 630         return 0;
 631 }
 632
 633 static int ath10k_init_hw_params(struct ath10k *ar)
 634 {
 635         const struct ath10k_hw_params *uninitialized_var(hw_params);
 636         int i;
 637
 638         for (i = 0; i < ARRAY_SIZE(ath10k_hw_params_list); i++) {
 639                 hw_params = &ath10k_hw_params_list[i];
 640
 641                 if (hw_params->id == ar->target_version)
 642                         break;
 643         }
 644
 645         if (i == ARRAY_SIZE(ath10k_hw_params_list)) {
 646                 ath10k_err("Unsupported hardware version: 0x%x\n",
 647                            ar->target_version);
 648                 return -EINVAL;
 649         }
 650
 651         ar->hw_params = *hw_params;
 652
 653         ath10k_dbg(ATH10K_DBG_BOOT, "Hardware name %s version 0x%x\n",
 654                    ar->hw_params.name, ar->target_version);
 655
 656         return 0;
 657 }
 658
 659 static void ath10k_core_restart(struct work_struct *work)
 660 {
 661         struct ath10k *ar = container_of(work, struct ath10k, restart_work);
 662
 663         mutex_lock(&ar->conf_mutex);
 664
 665         switch (ar->state) {
 666         case ATH10K_STATE_ON:
 667                 ar->state = ATH10K_STATE_RESTARTING;
 668                 ath10k_scan_finish(ar);
 669                 ieee80211_restart_hw(ar->hw);
 670                 break;
 671         case ATH10K_STATE_OFF:
 672                 /* this can happen if driver is being unloaded
 673                  * or if the crash happens during FW probing */
 674                 ath10k_warn("cannot restart a device that hasn't been started\n");
 675                 break;
 676         case ATH10K_STATE_RESTARTING:
 677                 /* hw restart might be requested from multiple places */
 678                 break;
 679         case ATH10K_STATE_RESTARTED:
 680                 ar->state = ATH10K_STATE_WEDGED;
 681                 /* fall through */
 682         case ATH10K_STATE_WEDGED:
 683                 ath10k_warn("device is wedged, will not restart\n");
 684                 break;
 685         }
 686
 687         mutex_unlock(&ar->conf_mutex);
 688 }
 689
 690 int ath10k_core_start(struct ath10k *ar)
 691 {
 692         int status;
 693
 694         lockdep_assert_held(&ar->conf_mutex);
 695
 696         ath10k_bmi_start(ar);
 697
 698         if (ath10k_init_configure_target(ar)) {
 699                 status = -EINVAL;
 700                 goto err;
 701         }
 702
 703         status = ath10k_init_download_firmware(ar);
 704         if (status)
 705                 goto err;
 706
 707         status = ath10k_init_uart(ar);
 708         if (status)
 709                 goto err;
 710
 711         ar->htc.htc_ops.target_send_suspend_complete =
 712                 ath10k_send_suspend_complete;
 713
 714         status = ath10k_htc_init(ar);
 715         if (status) {
 716                 ath10k_err("could not init HTC (%d)\n", status);
 717                 goto err;
 718         }
 719
 720         status = ath10k_bmi_done(ar);
 721         if (status)
 722                 goto err;
 723
 724         status = ath10k_wmi_attach(ar);
 725         if (status) {
 726                 ath10k_err("WMI attach failed: %d\n", status);
 727                 goto err;
 728         }
 729
 730         status = ath10k_htt_init(ar);
 731         if (status) {
 732                 ath10k_err("failed to init htt: %d\n", status);
 733                 goto err_wmi_detach;
 734         }
 735
 736         status = ath10k_htt_tx_alloc(&ar->htt);
 737         if (status) {
 738                 ath10k_err("failed to alloc htt tx: %d\n", status);
 739                 goto err_wmi_detach;
 740         }
 741
 742         status = ath10k_htt_rx_alloc(&ar->htt);
 743         if (status) {
 744                 ath10k_err("failed to alloc htt rx: %d\n", status);
 745                 goto err_htt_tx_detach;
 746         }
 747
 748         status = ath10k_hif_start(ar);
 749         if (status) {
 750                 ath10k_err("could not start HIF: %d\n", status);
 751                 goto err_htt_rx_detach;
 752         }
 753
 754         status = ath10k_htc_wait_target(&ar->htc);
 755         if (status) {
 756                 ath10k_err("failed to connect to HTC: %d\n", status);
 757                 goto err_hif_stop;
 758         }
 759
 760         status = ath10k_htt_connect(&ar->htt);
 761         if (status) {
 762                 ath10k_err("failed to connect htt (%d)\n", status);
 763                 goto err_hif_stop;
 764         }
 765
 766         status = ath10k_wmi_connect(ar);
 767         if (status) {
 768                 ath10k_err("could not connect wmi: %d\n", status);
 769                 goto err_hif_stop;
 770         }
 771
 772         status = ath10k_htc_start(&ar->htc);
 773         if (status) {
 774                 ath10k_err("failed to start htc: %d\n", status);
 775                 goto err_hif_stop;
 776         }
 777
 778         status = ath10k_wmi_wait_for_service_ready(ar);
 779         if (status <= 0) {
 780                 ath10k_warn("wmi service ready event not received");
 781                 status = -ETIMEDOUT;
 782                 goto err_htc_stop;
 783         }
 784
 785         ath10k_dbg(ATH10K_DBG_BOOT, "firmware %s booted\n",
 786                    ar->hw->wiphy->fw_version);
 787
 788         status = ath10k_wmi_cmd_init(ar);
 789         if (status) {
 790                 ath10k_err("could not send WMI init command (%d)\n", status);
 791                 goto err_htc_stop;
 792         }
 793
 794         status = ath10k_wmi_wait_for_unified_ready(ar);
 795         if (status <= 0) {
 796                 ath10k_err("wmi unified ready event not received\n");
 797                 status = -ETIMEDOUT;
 798                 goto err_htc_stop;
 799         }
 800
 801         status = ath10k_htt_setup(&ar->htt);
 802         if (status) {
 803                 ath10k_err("failed to setup htt: %d\n", status);
 804                 goto err_htc_stop;
 805         }
 806
 807         status = ath10k_debug_start(ar);
 808         if (status)
 809                 goto err_htc_stop;
 810
 811         if (test_bit(ATH10K_FW_FEATURE_WMI_10X, ar->fw_features))
 812                 ar->free_vdev_map = (1 << TARGET_10X_NUM_VDEVS) - 1;
 813         else
 814                 ar->free_vdev_map = (1 << TARGET_NUM_VDEVS) - 1;
 815
 816         INIT_LIST_HEAD(&ar->arvifs);
 817
 818         if (!test_bit(ATH10K_FLAG_FIRST_BOOT_DONE, &ar->dev_flags)) {
 819                 ath10k_info("%s (0x%08x, 0x%08x) fw %s api %d htt %d.%d\n",
 820                             ar->hw_params.name,
 821                             ar->target_version,
 822                             ar->chip_id,
 823                             ar->hw->wiphy->fw_version,
 824                             ar->fw_api,
 825                             ar->htt.target_version_major,
 826                             ar->htt.target_version_minor);
 827                 ath10k_info("debug %d debugfs %d tracing %d dfs %d\n",
 828                             config_enabled(CONFIG_ATH10K_DEBUG),
 829                             config_enabled(CONFIG_ATH10K_DEBUGFS),
 830                             config_enabled(CONFIG_ATH10K_TRACING),
 831                             config_enabled(CONFIG_ATH10K_DFS_CERTIFIED));
 832         }
 833
 834         __set_bit(ATH10K_FLAG_FIRST_BOOT_DONE, &ar->dev_flags);
 835
 836         return 0;
 837
 838 err_htc_stop:
 839         ath10k_htc_stop(&ar->htc);
 840 err_hif_stop:
 841         ath10k_hif_stop(ar);
 842 err_htt_rx_detach:
 843         ath10k_htt_rx_free(&ar->htt);
 844 err_htt_tx_detach:
 845         ath10k_htt_tx_free(&ar->htt);
 846 err_wmi_detach:
 847         ath10k_wmi_detach(ar);
 848 err:
 849         return status;
 850 }
 851 EXPORT_SYMBOL(ath10k_core_start);
 852
 853 int ath10k_wait_for_suspend(struct ath10k *ar, u32 suspend_opt)
 854 {
 855         int ret;
 856
 857         reinit_completion(&ar->target_suspend);
 858
 859         ret = ath10k_wmi_pdev_suspend_target(ar, suspend_opt);
 860         if (ret) {
 861                 ath10k_warn("could not suspend target (%d)\n", ret);
 862                 return ret;
 863         }
 864
 865         ret = wait_for_completion_timeout(&ar->target_suspend, 1 * HZ);
 866
 867         if (ret == 0) {
 868                 ath10k_warn("suspend timed out - target pause event never came\n");
 869                 return -ETIMEDOUT;
 870         }
 871
 872         return 0;
 873 }
 874
 875 void ath10k_core_stop(struct ath10k *ar)
 876 {
 877         lockdep_assert_held(&ar->conf_mutex);
 878
 879         /* try to suspend target */
 880         if (ar->state != ATH10K_STATE_RESTARTING)
 881                 ath10k_wait_for_suspend(ar, WMI_PDEV_SUSPEND_AND_DISABLE_INTR);
 882
 883         ath10k_debug_stop(ar);
 884         ath10k_htc_stop(&ar->htc);
 885         ath10k_hif_stop(ar);
 886         ath10k_htt_tx_free(&ar->htt);
 887         ath10k_htt_rx_free(&ar->htt);
 888         ath10k_wmi_detach(ar);
 889 }
 890 EXPORT_SYMBOL(ath10k_core_stop);
 891
 892 /* mac80211 manages fw/hw initialization through start/stop hooks. However in
 893  * order to know what hw capabilities should be advertised to mac80211 it is
 894  * necessary to load the firmware (and tear it down immediately since start
 895  * hook will try to init it again) before registering */
 896 static int ath10k_core_probe_fw(struct ath10k *ar)
 897 {
 898         struct bmi_target_info target_info;
 899         int ret = 0;
 900
 901         ret = ath10k_hif_power_up(ar);
 902         if (ret) {
 903                 ath10k_err("could not start pci hif (%d)\n", ret);
 904                 return ret;
 905         }
 906
 907         memset(&target_info, 0, sizeof(target_info));
 908         ret = ath10k_bmi_get_target_info(ar, &target_info);
 909         if (ret) {
 910                 ath10k_err("could not get target info (%d)\n", ret);
 911                 ath10k_hif_power_down(ar);
 912                 return ret;
 913         }
 914
 915         ar->target_version = target_info.version;
 916         ar->hw->wiphy->hw_version = target_info.version;
 917
 918         ret = ath10k_init_hw_params(ar);
 919         if (ret) {
 920                 ath10k_err("could not get hw params (%d)\n", ret);
 921                 ath10k_hif_power_down(ar);
 922                 return ret;
 923         }
 924
 925         ret = ath10k_core_fetch_firmware_files(ar);
 926         if (ret) {
 927                 ath10k_err("could not fetch firmware files (%d)\n", ret);
 928                 ath10k_hif_power_down(ar);
 929                 return ret;
 930         }
 931
 932         mutex_lock(&ar->conf_mutex);
 933
 934         ret = ath10k_core_start(ar);
 935         if (ret) {
 936                 ath10k_err("could not init core (%d)\n", ret);
 937                 ath10k_core_free_firmware_files(ar);
 938                 ath10k_hif_power_down(ar);
 939                 mutex_unlock(&ar->conf_mutex);
 940                 return ret;
 941         }
 942
 943         ath10k_core_stop(ar);
 944
 945         mutex_unlock(&ar->conf_mutex);
 946
 947         ath10k_hif_power_down(ar);
 948         return 0;
 949 }
 950
 951 static int ath10k_core_check_chip_id(struct ath10k *ar)
 952 {
 953         u32 hw_revision = MS(ar->chip_id, SOC_CHIP_ID_REV);
 954
 955         ath10k_dbg(ATH10K_DBG_BOOT, "boot chip_id 0x%08x hw_revision 0x%x\n",
 956                    ar->chip_id, hw_revision);
 957
 958         /* Check that we are not using hw1.0 (some of them have same pci id
 959          * as hw2.0) before doing anything else as ath10k crashes horribly
 960          * due to missing hw1.0 workarounds. */
 961         switch (hw_revision) {
 962         case QCA988X_HW_1_0_CHIP_ID_REV:
 963                 ath10k_err("ERROR: qca988x hw1.0 is not supported\n");
 964                 return -EOPNOTSUPP;
 965
 966         case QCA988X_HW_2_0_CHIP_ID_REV:
 967                 /* known hardware revision, continue normally */
 968                 return 0;
 969
 970         default:
 971                 ath10k_warn("Warning: hardware revision unknown (0x%x), expect problems\n",
 972                             ar->chip_id);
 973                 return 0;
 974         }
 975
 976         return 0;
 977 }
 978
 979 static void ath10k_core_register_work(struct work_struct *work)
 980 {
 981         struct ath10k *ar = container_of(work, struct ath10k, register_work);
 982         int status;
 983
 984         status = ath10k_core_probe_fw(ar);
 985         if (status) {
 986                 ath10k_err("could not probe fw (%d)\n", status);
 987                 goto err;
 988         }
 989
 990         status = ath10k_mac_register(ar);
 991         if (status) {
 992                 ath10k_err("could not register to mac80211 (%d)\n", status);
 993                 goto err_release_fw;
 994         }
 995
 996         status = ath10k_debug_create(ar);
 997         if (status) {
 998                 ath10k_err("unable to initialize debugfs\n");
 999                 goto err_unregister_mac;
1000         }
1001
1002         status = ath10k_spectral_create(ar);
1003         if (status) {
1004                 ath10k_err("failed to initialize spectral\n");
1005                 goto err_debug_destroy;
1006         }
1007
1008         set_bit(ATH10K_FLAG_CORE_REGISTERED, &ar->dev_flags);
1009         return;
1010
1011 err_debug_destroy:
1012         ath10k_debug_destroy(ar);
1013 err_unregister_mac:
1014         ath10k_mac_unregister(ar);
1015 err_release_fw:
1016         ath10k_core_free_firmware_files(ar);
1017 err:
1018         /* TODO: It's probably a good idea to release device from the driver
1019          * but calling device_release_driver() here will cause a deadlock.
1020          */
1021         return;
1022 }
1023
1024 int ath10k_core_register(struct ath10k *ar, u32 chip_id)
1025 {
1026         int status;
1027
1028         ar->chip_id = chip_id;
1029
1030         status = ath10k_core_check_chip_id(ar);
1031         if (status) {
1032                 ath10k_err("Unsupported chip id 0x%08x\n", ar->chip_id);
1033                 return status;
1034         }
1035
1036         queue_work(ar->workqueue, &ar->register_work);
1037
1038         return 0;
1039 }
1040 EXPORT_SYMBOL(ath10k_core_register);
1041
1042 void ath10k_core_unregister(struct ath10k *ar)
1043 {
1044         cancel_work_sync(&ar->register_work);
1045
1046         if (!test_bit(ATH10K_FLAG_CORE_REGISTERED, &ar->dev_flags))
1047                 return;
1048
1049         /* We must unregister from mac80211 before we stop HTC and HIF.
1050          * Otherwise we will fail to submit commands to FW and mac80211 will be
1051          * unhappy about callback failures. */
1052         ath10k_mac_unregister(ar);
1053
1054         ath10k_core_free_firmware_files(ar);
1055
1056         ath10k_spectral_destroy(ar);
1057
1058         ath10k_debug_destroy(ar);
1059 }
1060 EXPORT_SYMBOL(ath10k_core_unregister);
1061
1062 struct ath10k *ath10k_core_create(void *hif_priv, struct device *dev,
1063                                   const struct ath10k_hif_ops *hif_ops)
1064 {
1065         struct ath10k *ar;
1066
1067         ar = ath10k_mac_create();
1068         if (!ar)
1069                 return NULL;
1070
1071         ar->ath_common.priv = ar;
1072         ar->ath_common.hw = ar->hw;
1073
1074         ar->p2p = !!ath10k_p2p;
1075         ar->dev = dev;
1076
1077         ar->hif.priv = hif_priv;
1078         ar->hif.ops = hif_ops;
1079
1080         init_completion(&ar->scan.started);
1081         init_completion(&ar->scan.completed);
1082         init_completion(&ar->scan.on_channel);
1083         init_completion(&ar->target_suspend);
1084
1085         init_completion(&ar->install_key_done);
1086         init_completion(&ar->vdev_setup_done);
1087
1088         INIT_DELAYED_WORK(&ar->scan.timeout, ath10k_scan_timeout_work);
1089
1090         ar->workqueue = create_singlethread_workqueue("ath10k_wq");
1091         if (!ar->workqueue)
1092                 goto err_wq;
1093
1094         mutex_init(&ar->conf_mutex);
1095         spin_lock_init(&ar->data_lock);
1096
1097         INIT_LIST_HEAD(&ar->peers);
1098         init_waitqueue_head(&ar->peer_mapping_wq);
1099
1100         init_completion(&ar->offchan_tx_completed);
1101         INIT_WORK(&ar->offchan_tx_work, ath10k_offchan_tx_work);
1102         skb_queue_head_init(&ar->offchan_tx_queue);
1103
1104         INIT_WORK(&ar->wmi_mgmt_tx_work, ath10k_mgmt_over_wmi_tx_work);
1105         skb_queue_head_init(&ar->wmi_mgmt_tx_queue);
1106
1107         INIT_WORK(&ar->register_work, ath10k_core_register_work);
1108         INIT_WORK(&ar->restart_work, ath10k_core_restart);
1109
1110         return ar;
1111
1112 err_wq:
1113         ath10k_mac_destroy(ar);
1114         return NULL;
1115 }
1116 EXPORT_SYMBOL(ath10k_core_create);
1117
1118 void ath10k_core_destroy(struct ath10k *ar)
1119 {
1120         flush_workqueue(ar->workqueue);
1121         destroy_workqueue(ar->workqueue);
1122
1123         ath10k_mac_destroy(ar);
1124 }
1125 EXPORT_SYMBOL(ath10k_core_destroy);
1126
1127 MODULE_AUTHOR("Qualcomm Atheros");
1128 MODULE_DESCRIPTION("Core module for QCA988X PCIe devices.");
1129 MODULE_LICENSE("Dual BSD/GPL");