drivers/bluetooth/btqca.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Bluetooth supports for Qualcomm Atheros chips
   4  *
   5  *  Copyright (c) 2015 The Linux Foundation. All rights reserved.
   6  */
   7 #include <linux/module.h>
   8 #include <linux/firmware.h>
   9
  10 #include <net/bluetooth/bluetooth.h>
  11 #include <net/bluetooth/hci_core.h>
  12
  13 #include "btqca.h"
  14
  15 #define VERSION "0.1"
  16
  17 int qca_read_soc_version(struct hci_dev *hdev, struct qca_btsoc_version *ver,
  18                          enum qca_btsoc_type soc_type)
  19 {
  20         struct sk_buff *skb;
  21         struct edl_event_hdr *edl;
  22         char cmd;
  23         int err = 0;
  24         u8 event_type = HCI_EV_VENDOR;
  25         u8 rlen = sizeof(*edl) + sizeof(*ver);
  26         u8 rtype = EDL_APP_VER_RES_EVT;
  27
  28         bt_dev_dbg(hdev, "QCA Version Request");
  29
  30         /* Unlike other SoC's sending version command response as payload to
  31          * VSE event. WCN3991 sends version command response as a payload to
  32          * command complete event.
  33          */
  34         if (soc_type >= QCA_WCN3991) {
  35                 event_type = 0;
  36                 rlen += 1;
  37                 rtype = EDL_PATCH_VER_REQ_CMD;
  38         }
  39
  40         cmd = EDL_PATCH_VER_REQ_CMD;
  41         skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
  42                                 &cmd, event_type, HCI_INIT_TIMEOUT);
  43         if (IS_ERR(skb)) {
  44                 err = PTR_ERR(skb);
  45                 bt_dev_err(hdev, "Reading QCA version information failed (%d)",
  46                            err);
  47                 return err;
  48         }
  49
  50         if (skb->len != rlen) {
  51                 bt_dev_err(hdev, "QCA Version size mismatch len %d", skb->len);
  52                 err = -EILSEQ;
  53                 goto out;
  54         }
  55
  56         edl = (struct edl_event_hdr *)(skb->data);
  57         if (!edl) {
  58                 bt_dev_err(hdev, "QCA TLV with no header");
  59                 err = -EILSEQ;
  60                 goto out;
  61         }
  62
  63         if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
  64             edl->rtype != rtype) {
  65                 bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
  66                            edl->rtype);
  67                 err = -EIO;
  68                 goto out;
  69         }
  70
  71         if (soc_type >= QCA_WCN3991)
  72                 memcpy(ver, edl->data + 1, sizeof(*ver));
  73         else
  74                 memcpy(ver, &edl->data, sizeof(*ver));
  75
  76         bt_dev_info(hdev, "QCA Product ID   :0x%08x",
  77                     le32_to_cpu(ver->product_id));
  78         bt_dev_info(hdev, "QCA SOC Version  :0x%08x",
  79                     le32_to_cpu(ver->soc_id));
  80         bt_dev_info(hdev, "QCA ROM Version  :0x%08x",
  81                     le16_to_cpu(ver->rom_ver));
  82         bt_dev_info(hdev, "QCA Patch Version:0x%08x",
  83                     le16_to_cpu(ver->patch_ver));
  84
  85         if (ver->soc_id == 0 || ver->rom_ver == 0)
  86                 err = -EILSEQ;
  87
  88 out:
  89         kfree_skb(skb);
  90         if (err)
  91                 bt_dev_err(hdev, "QCA Failed to get version (%d)", err);
  92
  93         return err;
  94 }
  95 EXPORT_SYMBOL_GPL(qca_read_soc_version);
  96
  97 static int qca_read_fw_build_info(struct hci_dev *hdev)
  98 {
  99         struct sk_buff *skb;
 100         struct edl_event_hdr *edl;
 101         char cmd, build_label[QCA_FW_BUILD_VER_LEN];
 102         int build_lbl_len, err = 0;
 103
 104         bt_dev_dbg(hdev, "QCA read fw build info");
 105
 106         cmd = EDL_GET_BUILD_INFO_CMD;
 107         skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
 108                                 &cmd, 0, HCI_INIT_TIMEOUT);
 109         if (IS_ERR(skb)) {
 110                 err = PTR_ERR(skb);
 111                 bt_dev_err(hdev, "Reading QCA fw build info failed (%d)",
 112                            err);
 113                 return err;
 114         }
 115
 116         edl = (struct edl_event_hdr *)(skb->data);
 117         if (!edl) {
 118                 bt_dev_err(hdev, "QCA read fw build info with no header");
 119                 err = -EILSEQ;
 120                 goto out;
 121         }
 122
 123         if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
 124             edl->rtype != EDL_GET_BUILD_INFO_CMD) {
 125                 bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
 126                            edl->rtype);
 127                 err = -EIO;
 128                 goto out;
 129         }
 130
 131         build_lbl_len = edl->data[0];
 132         if (build_lbl_len <= QCA_FW_BUILD_VER_LEN - 1) {
 133                 memcpy(build_label, edl->data + 1, build_lbl_len);
 134                 *(build_label + build_lbl_len) = '\0';
 135         }
 136
 137         hci_set_fw_info(hdev, "%s", build_label);
 138
 139 out:
 140         kfree_skb(skb);
 141         return err;
 142 }
 143
 144 static int qca_send_reset(struct hci_dev *hdev)
 145 {
 146         struct sk_buff *skb;
 147         int err;
 148
 149         bt_dev_dbg(hdev, "QCA HCI_RESET");
 150
 151         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 152         if (IS_ERR(skb)) {
 153                 err = PTR_ERR(skb);
 154                 bt_dev_err(hdev, "QCA Reset failed (%d)", err);
 155                 return err;
 156         }
 157
 158         kfree_skb(skb);
 159
 160         return 0;
 161 }
 162
 163 int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
 164 {
 165         struct sk_buff *skb;
 166         int err;
 167
 168         bt_dev_dbg(hdev, "QCA pre shutdown cmd");
 169
 170         skb = __hci_cmd_sync_ev(hdev, QCA_PRE_SHUTDOWN_CMD, 0,
 171                                 NULL, HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
 172
 173         if (IS_ERR(skb)) {
 174                 err = PTR_ERR(skb);
 175                 bt_dev_err(hdev, "QCA preshutdown_cmd failed (%d)", err);
 176                 return err;
 177         }
 178
 179         kfree_skb(skb);
 180
 181         return 0;
 182 }
 183 EXPORT_SYMBOL_GPL(qca_send_pre_shutdown_cmd);
 184
 185 static void qca_tlv_check_data(struct qca_fw_config *config,
 186                 const struct firmware *fw, enum qca_btsoc_type soc_type)
 187 {
 188         const u8 *data;
 189         u32 type_len;
 190         u16 tag_id, tag_len;
 191         int idx, length;
 192         struct tlv_type_hdr *tlv;
 193         struct tlv_type_patch *tlv_patch;
 194         struct tlv_type_nvm *tlv_nvm;
 195         uint8_t nvm_baud_rate = config->user_baud_rate;
 196
 197         tlv = (struct tlv_type_hdr *)fw->data;
 198
 199         type_len = le32_to_cpu(tlv->type_len);
 200         length = (type_len >> 8) & 0x00ffffff;
 201
 202         BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff);
 203         BT_DBG("Length\t\t : %d bytes", length);
 204
 205         config->dnld_mode = QCA_SKIP_EVT_NONE;
 206         config->dnld_type = QCA_SKIP_EVT_NONE;
 207
 208         switch (config->type) {
 209         case TLV_TYPE_PATCH:
 210                 tlv_patch = (struct tlv_type_patch *)tlv->data;
 211
 212                 /* For Rome version 1.1 to 3.1, all segment commands
 213                  * are acked by a vendor specific event (VSE).
 214                  * For Rome >= 3.2, the download mode field indicates
 215                  * if VSE is skipped by the controller.
 216                  * In case VSE is skipped, only the last segment is acked.
 217                  */
 218                 config->dnld_mode = tlv_patch->download_mode;
 219                 config->dnld_type = config->dnld_mode;
 220
 221                 BT_DBG("Total Length           : %d bytes",
 222                        le32_to_cpu(tlv_patch->total_size));
 223                 BT_DBG("Patch Data Length      : %d bytes",
 224                        le32_to_cpu(tlv_patch->data_length));
 225                 BT_DBG("Signing Format Version : 0x%x",
 226                        tlv_patch->format_version);
 227                 BT_DBG("Signature Algorithm    : 0x%x",
 228                        tlv_patch->signature);
 229                 BT_DBG("Download mode          : 0x%x",
 230                        tlv_patch->download_mode);
 231                 BT_DBG("Reserved               : 0x%x",
 232                        tlv_patch->reserved1);
 233                 BT_DBG("Product ID             : 0x%04x",
 234                        le16_to_cpu(tlv_patch->product_id));
 235                 BT_DBG("Rom Build Version      : 0x%04x",
 236                        le16_to_cpu(tlv_patch->rom_build));
 237                 BT_DBG("Patch Version          : 0x%04x",
 238                        le16_to_cpu(tlv_patch->patch_version));
 239                 BT_DBG("Reserved               : 0x%x",
 240                        le16_to_cpu(tlv_patch->reserved2));
 241                 BT_DBG("Patch Entry Address    : 0x%x",
 242                        le32_to_cpu(tlv_patch->entry));
 243                 break;
 244
 245         case TLV_TYPE_NVM:
 246                 idx = 0;
 247                 data = tlv->data;
 248                 while (idx < length) {
 249                         tlv_nvm = (struct tlv_type_nvm *)(data + idx);
 250
 251                         tag_id = le16_to_cpu(tlv_nvm->tag_id);
 252                         tag_len = le16_to_cpu(tlv_nvm->tag_len);
 253
 254                         /* Update NVM tags as needed */
 255                         switch (tag_id) {
 256                         case EDL_TAG_ID_HCI:
 257                                 /* HCI transport layer parameters
 258                                  * enabling software inband sleep
 259                                  * onto controller side.
 260                                  */
 261                                 tlv_nvm->data[0] |= 0x80;
 262
 263                                 /* UART Baud Rate */
 264                                 if (soc_type >= QCA_WCN3991)
 265                                         tlv_nvm->data[1] = nvm_baud_rate;
 266                                 else
 267                                         tlv_nvm->data[2] = nvm_baud_rate;
 268
 269                                 break;
 270
 271                         case EDL_TAG_ID_DEEP_SLEEP:
 272                                 /* Sleep enable mask
 273                                  * enabling deep sleep feature on controller.
 274                                  */
 275                                 tlv_nvm->data[0] |= 0x01;
 276
 277                                 break;
 278                         }
 279
 280                         idx += (sizeof(u16) + sizeof(u16) + 8 + tag_len);
 281                 }
 282                 break;
 283
 284         default:
 285                 BT_ERR("Unknown TLV type %d", config->type);
 286                 break;
 287         }
 288 }
 289
 290 static int qca_tlv_send_segment(struct hci_dev *hdev, int seg_size,
 291                                 const u8 *data, enum qca_tlv_dnld_mode mode,
 292                                 enum qca_btsoc_type soc_type)
 293 {
 294         struct sk_buff *skb;
 295         struct edl_event_hdr *edl;
 296         struct tlv_seg_resp *tlv_resp;
 297         u8 cmd[MAX_SIZE_PER_TLV_SEGMENT + 2];
 298         int err = 0;
 299         u8 event_type = HCI_EV_VENDOR;
 300         u8 rlen = (sizeof(*edl) + sizeof(*tlv_resp));
 301         u8 rtype = EDL_TVL_DNLD_RES_EVT;
 302
 303         cmd[0] = EDL_PATCH_TLV_REQ_CMD;
 304         cmd[1] = seg_size;
 305         memcpy(cmd + 2, data, seg_size);
 306
 307         if (mode == QCA_SKIP_EVT_VSE_CC || mode == QCA_SKIP_EVT_VSE)
 308                 return __hci_cmd_send(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2,
 309                                       cmd);
 310
 311         /* Unlike other SoC's sending version command response as payload to
 312          * VSE event. WCN3991 sends version command response as a payload to
 313          * command complete event.
 314          */
 315         if (soc_type >= QCA_WCN3991) {
 316                 event_type = 0;
 317                 rlen = sizeof(*edl);
 318                 rtype = EDL_PATCH_TLV_REQ_CMD;
 319         }
 320
 321         skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2, cmd,
 322                                 event_type, HCI_INIT_TIMEOUT);
 323         if (IS_ERR(skb)) {
 324                 err = PTR_ERR(skb);
 325                 bt_dev_err(hdev, "QCA Failed to send TLV segment (%d)", err);
 326                 return err;
 327         }
 328
 329         if (skb->len != rlen) {
 330                 bt_dev_err(hdev, "QCA TLV response size mismatch");
 331                 err = -EILSEQ;
 332                 goto out;
 333         }
 334
 335         edl = (struct edl_event_hdr *)(skb->data);
 336         if (!edl) {
 337                 bt_dev_err(hdev, "TLV with no header");
 338                 err = -EILSEQ;
 339                 goto out;
 340         }
 341
 342         if (edl->cresp != EDL_CMD_REQ_RES_EVT || edl->rtype != rtype) {
 343                 bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x",
 344                            edl->cresp, edl->rtype);
 345                 err = -EIO;
 346         }
 347
 348         if (soc_type >= QCA_WCN3991)
 349                 goto out;
 350
 351         tlv_resp = (struct tlv_seg_resp *)(edl->data);
 352         if (tlv_resp->result) {
 353                 bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x (0x%x)",
 354                            edl->cresp, edl->rtype, tlv_resp->result);
 355         }
 356
 357 out:
 358         kfree_skb(skb);
 359
 360         return err;
 361 }
 362
 363 static int qca_inject_cmd_complete_event(struct hci_dev *hdev)
 364 {
 365         struct hci_event_hdr *hdr;
 366         struct hci_ev_cmd_complete *evt;
 367         struct sk_buff *skb;
 368
 369         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
 370         if (!skb)
 371                 return -ENOMEM;
 372
 373         hdr = skb_put(skb, sizeof(*hdr));
 374         hdr->evt = HCI_EV_CMD_COMPLETE;
 375         hdr->plen = sizeof(*evt) + 1;
 376
 377         evt = skb_put(skb, sizeof(*evt));
 378         evt->ncmd = 1;
 379         evt->opcode = cpu_to_le16(QCA_HCI_CC_OPCODE);
 380
 381         skb_put_u8(skb, QCA_HCI_CC_SUCCESS);
 382
 383         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 384
 385         return hci_recv_frame(hdev, skb);
 386 }
 387
 388 static int qca_download_firmware(struct hci_dev *hdev,
 389                                  struct qca_fw_config *config,
 390                                  enum qca_btsoc_type soc_type)
 391 {
 392         const struct firmware *fw;
 393         const u8 *segment;
 394         int ret, remain, i = 0;
 395
 396         bt_dev_info(hdev, "QCA Downloading %s", config->fwname);
 397
 398         ret = request_firmware(&fw, config->fwname, &hdev->dev);
 399         if (ret) {
 400                 bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
 401                            config->fwname, ret);
 402                 return ret;
 403         }
 404
 405         qca_tlv_check_data(config, fw, soc_type);
 406
 407         segment = fw->data;
 408         remain = fw->size;
 409         while (remain > 0) {
 410                 int segsize = min(MAX_SIZE_PER_TLV_SEGMENT, remain);
 411
 412                 bt_dev_dbg(hdev, "Send segment %d, size %d", i++, segsize);
 413
 414                 remain -= segsize;
 415                 /* The last segment is always acked regardless download mode */
 416                 if (!remain || segsize < MAX_SIZE_PER_TLV_SEGMENT)
 417                         config->dnld_mode = QCA_SKIP_EVT_NONE;
 418
 419                 ret = qca_tlv_send_segment(hdev, segsize, segment,
 420                                            config->dnld_mode, soc_type);
 421                 if (ret)
 422                         goto out;
 423
 424                 segment += segsize;
 425         }
 426
 427         /* Latest qualcomm chipsets are not sending a command complete event
 428          * for every fw packet sent. They only respond with a vendor specific
 429          * event for the last packet. This optimization in the chip will
 430          * decrease the BT in initialization time. Here we will inject a command
 431          * complete event to avoid a command timeout error message.
 432          */
 433         if (config->dnld_type == QCA_SKIP_EVT_VSE_CC ||
 434             config->dnld_type == QCA_SKIP_EVT_VSE)
 435                 ret = qca_inject_cmd_complete_event(hdev);
 436
 437 out:
 438         release_firmware(fw);
 439
 440         return ret;
 441 }
 442
 443 static int qca_disable_soc_logging(struct hci_dev *hdev)
 444 {
 445         struct sk_buff *skb;
 446         u8 cmd[2];
 447         int err;
 448
 449         cmd[0] = QCA_DISABLE_LOGGING_SUB_OP;
 450         cmd[1] = 0x00;
 451         skb = __hci_cmd_sync_ev(hdev, QCA_DISABLE_LOGGING, sizeof(cmd), cmd,
 452                                 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
 453         if (IS_ERR(skb)) {
 454                 err = PTR_ERR(skb);
 455                 bt_dev_err(hdev, "QCA Failed to disable soc logging(%d)", err);
 456                 return err;
 457         }
 458
 459         kfree_skb(skb);
 460
 461         return 0;
 462 }
 463
 464 int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 465 {
 466         struct sk_buff *skb;
 467         u8 cmd[9];
 468         int err;
 469
 470         cmd[0] = EDL_NVM_ACCESS_SET_REQ_CMD;
 471         cmd[1] = 0x02;                  /* TAG ID */
 472         cmd[2] = sizeof(bdaddr_t);      /* size */
 473         memcpy(cmd + 3, bdaddr, sizeof(bdaddr_t));
 474         skb = __hci_cmd_sync_ev(hdev, EDL_NVM_ACCESS_OPCODE, sizeof(cmd), cmd,
 475                                 HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
 476         if (IS_ERR(skb)) {
 477                 err = PTR_ERR(skb);
 478                 bt_dev_err(hdev, "QCA Change address command failed (%d)", err);
 479                 return err;
 480         }
 481
 482         kfree_skb(skb);
 483
 484         return 0;
 485 }
 486 EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
 487
 488 int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 489                    enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
 490                    const char *firmware_name)
 491 {
 492         struct qca_fw_config config;
 493         int err;
 494         u8 rom_ver = 0;
 495         u32 soc_ver;
 496
 497         bt_dev_dbg(hdev, "QCA setup on UART");
 498
 499         soc_ver = get_soc_ver(ver.soc_id, ver.rom_ver);
 500
 501         bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
 502
 503         config.user_baud_rate = baudrate;
 504
 505         /* Download rampatch file */
 506         config.type = TLV_TYPE_PATCH;
 507         if (qca_is_wcn399x(soc_type)) {
 508                 /* Firmware files to download are based on ROM version.
 509                  * ROM version is derived from last two bytes of soc_ver.
 510                  */
 511                 rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
 512                             (soc_ver & 0x0000000f);
 513                 snprintf(config.fwname, sizeof(config.fwname),
 514                          "qca/crbtfw%02x.tlv", rom_ver);
 515         } else if (soc_type == QCA_QCA6390) {
 516                 rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
 517                             (soc_ver & 0x0000000f);
 518                 snprintf(config.fwname, sizeof(config.fwname),
 519                          "qca/htbtfw%02x.tlv", rom_ver);
 520         } else {
 521                 snprintf(config.fwname, sizeof(config.fwname),
 522                          "qca/rampatch_%08x.bin", soc_ver);
 523         }
 524
 525         err = qca_download_firmware(hdev, &config, soc_type);
 526         if (err < 0) {
 527                 bt_dev_err(hdev, "QCA Failed to download patch (%d)", err);
 528                 return err;
 529         }
 530
 531         /* Give the controller some time to get ready to receive the NVM */
 532         msleep(10);
 533
 534         /* Download NVM configuration */
 535         config.type = TLV_TYPE_NVM;
 536         if (firmware_name)
 537                 snprintf(config.fwname, sizeof(config.fwname),
 538                          "qca/%s", firmware_name);
 539         else if (qca_is_wcn399x(soc_type)) {
 540                 if (ver.soc_id == QCA_WCN3991_SOC_ID) {
 541                         snprintf(config.fwname, sizeof(config.fwname),
 542                                  "qca/crnv%02xu.bin", rom_ver);
 543                 } else {
 544                         snprintf(config.fwname, sizeof(config.fwname),
 545                                  "qca/crnv%02x.bin", rom_ver);
 546                 }
 547         }
 548         else if (soc_type == QCA_QCA6390)
 549                 snprintf(config.fwname, sizeof(config.fwname),
 550                          "qca/htnv%02x.bin", rom_ver);
 551         else
 552                 snprintf(config.fwname, sizeof(config.fwname),
 553                          "qca/nvm_%08x.bin", soc_ver);
 554
 555         err = qca_download_firmware(hdev, &config, soc_type);
 556         if (err < 0) {
 557                 bt_dev_err(hdev, "QCA Failed to download NVM (%d)", err);
 558                 return err;
 559         }
 560
 561         if (soc_type >= QCA_WCN3991) {
 562                 err = qca_disable_soc_logging(hdev);
 563                 if (err < 0)
 564                         return err;
 565         }
 566
 567         /* WCN399x supports the Microsoft vendor extension with 0xFD70 as the
 568          * VsMsftOpCode.
 569          */
 570         switch (soc_type) {
 571         case QCA_WCN3990:
 572         case QCA_WCN3991:
 573         case QCA_WCN3998:
 574                 hci_set_msft_opcode(hdev, 0xFD70);
 575                 break;
 576         default:
 577                 break;
 578         }
 579
 580         /* Perform HCI reset */
 581         err = qca_send_reset(hdev);
 582         if (err < 0) {
 583                 bt_dev_err(hdev, "QCA Failed to run HCI_RESET (%d)", err);
 584                 return err;
 585         }
 586
 587         if (soc_type == QCA_WCN3991) {
 588                 /* get fw build info */
 589                 err = qca_read_fw_build_info(hdev);
 590                 if (err < 0)
 591                         return err;
 592         }
 593
 594         bt_dev_info(hdev, "QCA setup on UART is completed");
 595
 596         return 0;
 597 }
 598 EXPORT_SYMBOL_GPL(qca_uart_setup);
 599
 600 int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 601 {
 602         struct sk_buff *skb;
 603         int err;
 604
 605         skb = __hci_cmd_sync_ev(hdev, EDL_WRITE_BD_ADDR_OPCODE, 6, bdaddr,
 606                                 HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
 607         if (IS_ERR(skb)) {
 608                 err = PTR_ERR(skb);
 609                 bt_dev_err(hdev, "QCA Change address cmd failed (%d)", err);
 610                 return err;
 611         }
 612
 613         kfree_skb(skb);
 614
 615         return 0;
 616 }
 617 EXPORT_SYMBOL_GPL(qca_set_bdaddr);
 618
 619
 620 MODULE_AUTHOR("Ben Young Tae Kim <ytkim@qca.qualcomm.com>");
 621 MODULE_DESCRIPTION("Bluetooth support for Qualcomm Atheros family ver " VERSION);
 622 MODULE_VERSION(VERSION);
 623 MODULE_LICENSE("GPL");