linux/drivers/bluetooth/btqca.c
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   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
  17int 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
  88out:
  89        kfree_skb(skb);
  90        if (err)
  91                bt_dev_err(hdev, "QCA Failed to get version (%d)", err);
  92
  93        return err;
  94}
  95EXPORT_SYMBOL_GPL(qca_read_soc_version);
  96
  97static 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
 139out:
 140        kfree_skb(skb);
 141        return err;
 142}
 143
 144static 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
 163int 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}
 183EXPORT_SYMBOL_GPL(qca_send_pre_shutdown_cmd);
 184
 185static void qca_tlv_check_data(struct qca_fw_config *config,
 186                u8 *fw_data, 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
 290static 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
 357out:
 358        kfree_skb(skb);
 359
 360        return err;
 361}
 362
 363static 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
 388static 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        u8 *data;
 394        const u8 *segment;
 395        int ret, size, remain, i = 0;
 396
 397        bt_dev_info(hdev, "QCA Downloading %s", config->fwname);
 398
 399        ret = request_firmware(&fw, config->fwname, &hdev->dev);
 400        if (ret) {
 401                bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
 402                           config->fwname, ret);
 403                return ret;
 404        }
 405
 406        size = fw->size;
 407        data = vmalloc(fw->size);
 408        if (!data) {
 409                bt_dev_err(hdev, "QCA Failed to allocate memory for file: %s",
 410                           config->fwname);
 411                release_firmware(fw);
 412                return -ENOMEM;
 413        }
 414
 415        memcpy(data, fw->data, size);
 416        release_firmware(fw);
 417
 418        qca_tlv_check_data(config, data, soc_type);
 419
 420        segment = data;
 421        remain = size;
 422        while (remain > 0) {
 423                int segsize = min(MAX_SIZE_PER_TLV_SEGMENT, remain);
 424
 425                bt_dev_dbg(hdev, "Send segment %d, size %d", i++, segsize);
 426
 427                remain -= segsize;
 428                /* The last segment is always acked regardless download mode */
 429                if (!remain || segsize < MAX_SIZE_PER_TLV_SEGMENT)
 430                        config->dnld_mode = QCA_SKIP_EVT_NONE;
 431
 432                ret = qca_tlv_send_segment(hdev, segsize, segment,
 433                                           config->dnld_mode, soc_type);
 434                if (ret)
 435                        goto out;
 436
 437                segment += segsize;
 438        }
 439
 440        /* Latest qualcomm chipsets are not sending a command complete event
 441         * for every fw packet sent. They only respond with a vendor specific
 442         * event for the last packet. This optimization in the chip will
 443         * decrease the BT in initialization time. Here we will inject a command
 444         * complete event to avoid a command timeout error message.
 445         */
 446        if (config->dnld_type == QCA_SKIP_EVT_VSE_CC ||
 447            config->dnld_type == QCA_SKIP_EVT_VSE)
 448                ret = qca_inject_cmd_complete_event(hdev);
 449
 450out:
 451        vfree(data);
 452
 453        return ret;
 454}
 455
 456static int qca_disable_soc_logging(struct hci_dev *hdev)
 457{
 458        struct sk_buff *skb;
 459        u8 cmd[2];
 460        int err;
 461
 462        cmd[0] = QCA_DISABLE_LOGGING_SUB_OP;
 463        cmd[1] = 0x00;
 464        skb = __hci_cmd_sync_ev(hdev, QCA_DISABLE_LOGGING, sizeof(cmd), cmd,
 465                                HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
 466        if (IS_ERR(skb)) {
 467                err = PTR_ERR(skb);
 468                bt_dev_err(hdev, "QCA Failed to disable soc logging(%d)", err);
 469                return err;
 470        }
 471
 472        kfree_skb(skb);
 473
 474        return 0;
 475}
 476
 477int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 478{
 479        struct sk_buff *skb;
 480        u8 cmd[9];
 481        int err;
 482
 483        cmd[0] = EDL_NVM_ACCESS_SET_REQ_CMD;
 484        cmd[1] = 0x02;                  /* TAG ID */
 485        cmd[2] = sizeof(bdaddr_t);      /* size */
 486        memcpy(cmd + 3, bdaddr, sizeof(bdaddr_t));
 487        skb = __hci_cmd_sync_ev(hdev, EDL_NVM_ACCESS_OPCODE, sizeof(cmd), cmd,
 488                                HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
 489        if (IS_ERR(skb)) {
 490                err = PTR_ERR(skb);
 491                bt_dev_err(hdev, "QCA Change address command failed (%d)", err);
 492                return err;
 493        }
 494
 495        kfree_skb(skb);
 496
 497        return 0;
 498}
 499EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
 500
 501int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 502                   enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
 503                   const char *firmware_name)
 504{
 505        struct qca_fw_config config;
 506        int err;
 507        u8 rom_ver = 0;
 508        u32 soc_ver;
 509
 510        bt_dev_dbg(hdev, "QCA setup on UART");
 511
 512        soc_ver = get_soc_ver(ver.soc_id, ver.rom_ver);
 513
 514        bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
 515
 516        config.user_baud_rate = baudrate;
 517
 518        /* Download rampatch file */
 519        config.type = TLV_TYPE_PATCH;
 520        if (qca_is_wcn399x(soc_type)) {
 521                /* Firmware files to download are based on ROM version.
 522                 * ROM version is derived from last two bytes of soc_ver.
 523                 */
 524                rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
 525                            (soc_ver & 0x0000000f);
 526                snprintf(config.fwname, sizeof(config.fwname),
 527                         "qca/crbtfw%02x.tlv", rom_ver);
 528        } else if (soc_type == QCA_QCA6390) {
 529                rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
 530                            (soc_ver & 0x0000000f);
 531                snprintf(config.fwname, sizeof(config.fwname),
 532                         "qca/htbtfw%02x.tlv", rom_ver);
 533        } else {
 534                snprintf(config.fwname, sizeof(config.fwname),
 535                         "qca/rampatch_%08x.bin", soc_ver);
 536        }
 537
 538        err = qca_download_firmware(hdev, &config, soc_type);
 539        if (err < 0) {
 540                bt_dev_err(hdev, "QCA Failed to download patch (%d)", err);
 541                return err;
 542        }
 543
 544        /* Give the controller some time to get ready to receive the NVM */
 545        msleep(10);
 546
 547        /* Download NVM configuration */
 548        config.type = TLV_TYPE_NVM;
 549        if (firmware_name)
 550                snprintf(config.fwname, sizeof(config.fwname),
 551                         "qca/%s", firmware_name);
 552        else if (qca_is_wcn399x(soc_type)) {
 553                if (ver.soc_id == QCA_WCN3991_SOC_ID) {
 554                        snprintf(config.fwname, sizeof(config.fwname),
 555                                 "qca/crnv%02xu.bin", rom_ver);
 556                } else {
 557                        snprintf(config.fwname, sizeof(config.fwname),
 558                                 "qca/crnv%02x.bin", rom_ver);
 559                }
 560        }
 561        else if (soc_type == QCA_QCA6390)
 562                snprintf(config.fwname, sizeof(config.fwname),
 563                         "qca/htnv%02x.bin", rom_ver);
 564        else
 565                snprintf(config.fwname, sizeof(config.fwname),
 566                         "qca/nvm_%08x.bin", soc_ver);
 567
 568        err = qca_download_firmware(hdev, &config, soc_type);
 569        if (err < 0) {
 570                bt_dev_err(hdev, "QCA Failed to download NVM (%d)", err);
 571                return err;
 572        }
 573
 574        if (soc_type >= QCA_WCN3991) {
 575                err = qca_disable_soc_logging(hdev);
 576                if (err < 0)
 577                        return err;
 578        }
 579
 580        /* WCN399x supports the Microsoft vendor extension with 0xFD70 as the
 581         * VsMsftOpCode.
 582         */
 583        switch (soc_type) {
 584        case QCA_WCN3990:
 585        case QCA_WCN3991:
 586        case QCA_WCN3998:
 587                hci_set_msft_opcode(hdev, 0xFD70);
 588                break;
 589        default:
 590                break;
 591        }
 592
 593        /* Perform HCI reset */
 594        err = qca_send_reset(hdev);
 595        if (err < 0) {
 596                bt_dev_err(hdev, "QCA Failed to run HCI_RESET (%d)", err);
 597                return err;
 598        }
 599
 600        if (soc_type == QCA_WCN3991) {
 601                /* get fw build info */
 602                err = qca_read_fw_build_info(hdev);
 603                if (err < 0)
 604                        return err;
 605        }
 606
 607        bt_dev_info(hdev, "QCA setup on UART is completed");
 608
 609        return 0;
 610}
 611EXPORT_SYMBOL_GPL(qca_uart_setup);
 612
 613int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 614{
 615        struct sk_buff *skb;
 616        int err;
 617
 618        skb = __hci_cmd_sync_ev(hdev, EDL_WRITE_BD_ADDR_OPCODE, 6, bdaddr,
 619                                HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
 620        if (IS_ERR(skb)) {
 621                err = PTR_ERR(skb);
 622                bt_dev_err(hdev, "QCA Change address cmd failed (%d)", err);
 623                return err;
 624        }
 625
 626        kfree_skb(skb);
 627
 628        return 0;
 629}
 630EXPORT_SYMBOL_GPL(qca_set_bdaddr);
 631
 632
 633MODULE_AUTHOR("Ben Young Tae Kim <ytkim@qca.qualcomm.com>");
 634MODULE_DESCRIPTION("Bluetooth support for Qualcomm Atheros family ver " VERSION);
 635MODULE_VERSION(VERSION);
 636MODULE_LICENSE("GPL");
 637