drivers/bluetooth/btintel.c

   1 /*
   2  *
   3  *  Bluetooth support for Intel devices
   4  *
   5  *  Copyright (C) 2015  Intel Corporation
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/firmware.h>
  26 #include <linux/regmap.h>
  27 #include <asm/unaligned.h>
  28
  29 #include <net/bluetooth/bluetooth.h>
  30 #include <net/bluetooth/hci_core.h>
  31
  32 #include "btintel.h"
  33
  34 #define VERSION "0.1"
  35
  36 #define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
  37
  38 int btintel_check_bdaddr(struct hci_dev *hdev)
  39 {
  40         struct hci_rp_read_bd_addr *bda;
  41         struct sk_buff *skb;
  42
  43         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
  44                              HCI_INIT_TIMEOUT);
  45         if (IS_ERR(skb)) {
  46                 int err = PTR_ERR(skb);
  47                 bt_dev_err(hdev, "Reading Intel device address failed (%d)",
  48                            err);
  49                 return err;
  50         }
  51
  52         if (skb->len != sizeof(*bda)) {
  53                 bt_dev_err(hdev, "Intel device address length mismatch");
  54                 kfree_skb(skb);
  55                 return -EIO;
  56         }
  57
  58         bda = (struct hci_rp_read_bd_addr *)skb->data;
  59
  60         /* For some Intel based controllers, the default Bluetooth device
  61          * address 00:03:19:9E:8B:00 can be found. These controllers are
  62          * fully operational, but have the danger of duplicate addresses
  63          * and that in turn can cause problems with Bluetooth operation.
  64          */
  65         if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
  66                 bt_dev_err(hdev, "Found Intel default device address (%pMR)",
  67                            &bda->bdaddr);
  68                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  69         }
  70
  71         kfree_skb(skb);
  72
  73         return 0;
  74 }
  75 EXPORT_SYMBOL_GPL(btintel_check_bdaddr);
  76
  77 int btintel_enter_mfg(struct hci_dev *hdev)
  78 {
  79         static const u8 param[] = { 0x01, 0x00 };
  80         struct sk_buff *skb;
  81
  82         skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
  83         if (IS_ERR(skb)) {
  84                 bt_dev_err(hdev, "Entering manufacturer mode failed (%ld)",
  85                            PTR_ERR(skb));
  86                 return PTR_ERR(skb);
  87         }
  88         kfree_skb(skb);
  89
  90         return 0;
  91 }
  92 EXPORT_SYMBOL_GPL(btintel_enter_mfg);
  93
  94 int btintel_exit_mfg(struct hci_dev *hdev, bool reset, bool patched)
  95 {
  96         u8 param[] = { 0x00, 0x00 };
  97         struct sk_buff *skb;
  98
  99         /* The 2nd command parameter specifies the manufacturing exit method:
 100          * 0x00: Just disable the manufacturing mode (0x00).
 101          * 0x01: Disable manufacturing mode and reset with patches deactivated.
 102          * 0x02: Disable manufacturing mode and reset with patches activated.
 103          */
 104         if (reset)
 105                 param[1] |= patched ? 0x02 : 0x01;
 106
 107         skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
 108         if (IS_ERR(skb)) {
 109                 bt_dev_err(hdev, "Exiting manufacturer mode failed (%ld)",
 110                            PTR_ERR(skb));
 111                 return PTR_ERR(skb);
 112         }
 113         kfree_skb(skb);
 114
 115         return 0;
 116 }
 117 EXPORT_SYMBOL_GPL(btintel_exit_mfg);
 118
 119 int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 120 {
 121         struct sk_buff *skb;
 122         int err;
 123
 124         skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
 125         if (IS_ERR(skb)) {
 126                 err = PTR_ERR(skb);
 127                 bt_dev_err(hdev, "Changing Intel device address failed (%d)",
 128                            err);
 129                 return err;
 130         }
 131         kfree_skb(skb);
 132
 133         return 0;
 134 }
 135 EXPORT_SYMBOL_GPL(btintel_set_bdaddr);
 136
 137 int btintel_set_diag(struct hci_dev *hdev, bool enable)
 138 {
 139         struct sk_buff *skb;
 140         u8 param[3];
 141         int err;
 142
 143         if (enable) {
 144                 param[0] = 0x03;
 145                 param[1] = 0x03;
 146                 param[2] = 0x03;
 147         } else {
 148                 param[0] = 0x00;
 149                 param[1] = 0x00;
 150                 param[2] = 0x00;
 151         }
 152
 153         skb = __hci_cmd_sync(hdev, 0xfc43, 3, param, HCI_INIT_TIMEOUT);
 154         if (IS_ERR(skb)) {
 155                 err = PTR_ERR(skb);
 156                 if (err == -ENODATA)
 157                         goto done;
 158                 bt_dev_err(hdev, "Changing Intel diagnostic mode failed (%d)",
 159                            err);
 160                 return err;
 161         }
 162         kfree_skb(skb);
 163
 164 done:
 165         btintel_set_event_mask(hdev, enable);
 166         return 0;
 167 }
 168 EXPORT_SYMBOL_GPL(btintel_set_diag);
 169
 170 int btintel_set_diag_mfg(struct hci_dev *hdev, bool enable)
 171 {
 172         int err, ret;
 173
 174         err = btintel_enter_mfg(hdev);
 175         if (err)
 176                 return err;
 177
 178         ret = btintel_set_diag(hdev, enable);
 179
 180         err = btintel_exit_mfg(hdev, false, false);
 181         if (err)
 182                 return err;
 183
 184         return ret;
 185 }
 186 EXPORT_SYMBOL_GPL(btintel_set_diag_mfg);
 187
 188 void btintel_hw_error(struct hci_dev *hdev, u8 code)
 189 {
 190         struct sk_buff *skb;
 191         u8 type = 0x00;
 192
 193         bt_dev_err(hdev, "Hardware error 0x%2.2x", code);
 194
 195         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 196         if (IS_ERR(skb)) {
 197                 bt_dev_err(hdev, "Reset after hardware error failed (%ld)",
 198                            PTR_ERR(skb));
 199                 return;
 200         }
 201         kfree_skb(skb);
 202
 203         skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
 204         if (IS_ERR(skb)) {
 205                 bt_dev_err(hdev, "Retrieving Intel exception info failed (%ld)",
 206                            PTR_ERR(skb));
 207                 return;
 208         }
 209
 210         if (skb->len != 13) {
 211                 bt_dev_err(hdev, "Exception info size mismatch");
 212                 kfree_skb(skb);
 213                 return;
 214         }
 215
 216         bt_dev_err(hdev, "Exception info %s", (char *)(skb->data + 1));
 217
 218         kfree_skb(skb);
 219 }
 220 EXPORT_SYMBOL_GPL(btintel_hw_error);
 221
 222 void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver)
 223 {
 224         const char *variant;
 225
 226         switch (ver->fw_variant) {
 227         case 0x06:
 228                 variant = "Bootloader";
 229                 break;
 230         case 0x23:
 231                 variant = "Firmware";
 232                 break;
 233         default:
 234                 return;
 235         }
 236
 237         bt_dev_info(hdev, "%s revision %u.%u build %u week %u %u",
 238                     variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f,
 239                     ver->fw_build_num, ver->fw_build_ww,
 240                     2000 + ver->fw_build_yy);
 241 }
 242 EXPORT_SYMBOL_GPL(btintel_version_info);
 243
 244 int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
 245                         const void *param)
 246 {
 247         while (plen > 0) {
 248                 struct sk_buff *skb;
 249                 u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;
 250
 251                 cmd_param[0] = fragment_type;
 252                 memcpy(cmd_param + 1, param, fragment_len);
 253
 254                 skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
 255                                      cmd_param, HCI_INIT_TIMEOUT);
 256                 if (IS_ERR(skb))
 257                         return PTR_ERR(skb);
 258
 259                 kfree_skb(skb);
 260
 261                 plen -= fragment_len;
 262                 param += fragment_len;
 263         }
 264
 265         return 0;
 266 }
 267 EXPORT_SYMBOL_GPL(btintel_secure_send);
 268
 269 int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name)
 270 {
 271         const struct firmware *fw;
 272         struct sk_buff *skb;
 273         const u8 *fw_ptr;
 274         int err;
 275
 276         err = request_firmware_direct(&fw, ddc_name, &hdev->dev);
 277         if (err < 0) {
 278                 bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)",
 279                            ddc_name, err);
 280                 return err;
 281         }
 282
 283         bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name);
 284
 285         fw_ptr = fw->data;
 286
 287         /* DDC file contains one or more DDC structure which has
 288          * Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2).
 289          */
 290         while (fw->size > fw_ptr - fw->data) {
 291                 u8 cmd_plen = fw_ptr[0] + sizeof(u8);
 292
 293                 skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr,
 294                                      HCI_INIT_TIMEOUT);
 295                 if (IS_ERR(skb)) {
 296                         bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)",
 297                                    PTR_ERR(skb));
 298                         release_firmware(fw);
 299                         return PTR_ERR(skb);
 300                 }
 301
 302                 fw_ptr += cmd_plen;
 303                 kfree_skb(skb);
 304         }
 305
 306         release_firmware(fw);
 307
 308         bt_dev_info(hdev, "Applying Intel DDC parameters completed");
 309
 310         return 0;
 311 }
 312 EXPORT_SYMBOL_GPL(btintel_load_ddc_config);
 313
 314 int btintel_set_event_mask(struct hci_dev *hdev, bool debug)
 315 {
 316         u8 mask[8] = { 0x87, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 317         struct sk_buff *skb;
 318         int err;
 319
 320         if (debug)
 321                 mask[1] |= 0x62;
 322
 323         skb = __hci_cmd_sync(hdev, 0xfc52, 8, mask, HCI_INIT_TIMEOUT);
 324         if (IS_ERR(skb)) {
 325                 err = PTR_ERR(skb);
 326                 bt_dev_err(hdev, "Setting Intel event mask failed (%d)", err);
 327                 return err;
 328         }
 329         kfree_skb(skb);
 330
 331         return 0;
 332 }
 333 EXPORT_SYMBOL_GPL(btintel_set_event_mask);
 334
 335 int btintel_set_event_mask_mfg(struct hci_dev *hdev, bool debug)
 336 {
 337         int err, ret;
 338
 339         err = btintel_enter_mfg(hdev);
 340         if (err)
 341                 return err;
 342
 343         ret = btintel_set_event_mask(hdev, debug);
 344
 345         err = btintel_exit_mfg(hdev, false, false);
 346         if (err)
 347                 return err;
 348
 349         return ret;
 350 }
 351 EXPORT_SYMBOL_GPL(btintel_set_event_mask_mfg);
 352
 353 int btintel_read_version(struct hci_dev *hdev, struct intel_version *ver)
 354 {
 355         struct sk_buff *skb;
 356
 357         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
 358         if (IS_ERR(skb)) {
 359                 bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
 360                            PTR_ERR(skb));
 361                 return PTR_ERR(skb);
 362         }
 363
 364         if (skb->len != sizeof(*ver)) {
 365                 bt_dev_err(hdev, "Intel version event size mismatch");
 366                 kfree_skb(skb);
 367                 return -EILSEQ;
 368         }
 369
 370         memcpy(ver, skb->data, sizeof(*ver));
 371
 372         kfree_skb(skb);
 373
 374         return 0;
 375 }
 376 EXPORT_SYMBOL_GPL(btintel_read_version);
 377
 378 /* ------- REGMAP IBT SUPPORT ------- */
 379
 380 #define IBT_REG_MODE_8BIT  0x00
 381 #define IBT_REG_MODE_16BIT 0x01
 382 #define IBT_REG_MODE_32BIT 0x02
 383
 384 struct regmap_ibt_context {
 385         struct hci_dev *hdev;
 386         __u16 op_write;
 387         __u16 op_read;
 388 };
 389
 390 struct ibt_cp_reg_access {
 391         __le32  addr;
 392         __u8    mode;
 393         __u8    len;
 394         __u8    data[0];
 395 } __packed;
 396
 397 struct ibt_rp_reg_access {
 398         __u8    status;
 399         __le32  addr;
 400         __u8    data[0];
 401 } __packed;
 402
 403 static int regmap_ibt_read(void *context, const void *addr, size_t reg_size,
 404                            void *val, size_t val_size)
 405 {
 406         struct regmap_ibt_context *ctx = context;
 407         struct ibt_cp_reg_access cp;
 408         struct ibt_rp_reg_access *rp;
 409         struct sk_buff *skb;
 410         int err = 0;
 411
 412         if (reg_size != sizeof(__le32))
 413                 return -EINVAL;
 414
 415         switch (val_size) {
 416         case 1:
 417                 cp.mode = IBT_REG_MODE_8BIT;
 418                 break;
 419         case 2:
 420                 cp.mode = IBT_REG_MODE_16BIT;
 421                 break;
 422         case 4:
 423                 cp.mode = IBT_REG_MODE_32BIT;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         /* regmap provides a little-endian formatted addr */
 430         cp.addr = *(__le32 *)addr;
 431         cp.len = val_size;
 432
 433         bt_dev_dbg(ctx->hdev, "Register (0x%x) read", le32_to_cpu(cp.addr));
 434
 435         skb = hci_cmd_sync(ctx->hdev, ctx->op_read, sizeof(cp), &cp,
 436                            HCI_CMD_TIMEOUT);
 437         if (IS_ERR(skb)) {
 438                 err = PTR_ERR(skb);
 439                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error (%d)",
 440                            le32_to_cpu(cp.addr), err);
 441                 return err;
 442         }
 443
 444         if (skb->len != sizeof(*rp) + val_size) {
 445                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad len",
 446                            le32_to_cpu(cp.addr));
 447                 err = -EINVAL;
 448                 goto done;
 449         }
 450
 451         rp = (struct ibt_rp_reg_access *)skb->data;
 452
 453         if (rp->addr != cp.addr) {
 454                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad addr",
 455                            le32_to_cpu(rp->addr));
 456                 err = -EINVAL;
 457                 goto done;
 458         }
 459
 460         memcpy(val, rp->data, val_size);
 461
 462 done:
 463         kfree_skb(skb);
 464         return err;
 465 }
 466
 467 static int regmap_ibt_gather_write(void *context,
 468                                    const void *addr, size_t reg_size,
 469                                    const void *val, size_t val_size)
 470 {
 471         struct regmap_ibt_context *ctx = context;
 472         struct ibt_cp_reg_access *cp;
 473         struct sk_buff *skb;
 474         int plen = sizeof(*cp) + val_size;
 475         u8 mode;
 476         int err = 0;
 477
 478         if (reg_size != sizeof(__le32))
 479                 return -EINVAL;
 480
 481         switch (val_size) {
 482         case 1:
 483                 mode = IBT_REG_MODE_8BIT;
 484                 break;
 485         case 2:
 486                 mode = IBT_REG_MODE_16BIT;
 487                 break;
 488         case 4:
 489                 mode = IBT_REG_MODE_32BIT;
 490                 break;
 491         default:
 492                 return -EINVAL;
 493         }
 494
 495         cp = kmalloc(plen, GFP_KERNEL);
 496         if (!cp)
 497                 return -ENOMEM;
 498
 499         /* regmap provides a little-endian formatted addr/value */
 500         cp->addr = *(__le32 *)addr;
 501         cp->mode = mode;
 502         cp->len = val_size;
 503         memcpy(&cp->data, val, val_size);
 504
 505         bt_dev_dbg(ctx->hdev, "Register (0x%x) write", le32_to_cpu(cp->addr));
 506
 507         skb = hci_cmd_sync(ctx->hdev, ctx->op_write, plen, cp, HCI_CMD_TIMEOUT);
 508         if (IS_ERR(skb)) {
 509                 err = PTR_ERR(skb);
 510                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) write error (%d)",
 511                            le32_to_cpu(cp->addr), err);
 512                 goto done;
 513         }
 514         kfree_skb(skb);
 515
 516 done:
 517         kfree(cp);
 518         return err;
 519 }
 520
 521 static int regmap_ibt_write(void *context, const void *data, size_t count)
 522 {
 523         /* data contains register+value, since we only support 32bit addr,
 524          * minimum data size is 4 bytes.
 525          */
 526         if (WARN_ONCE(count < 4, "Invalid register access"))
 527                 return -EINVAL;
 528
 529         return regmap_ibt_gather_write(context, data, 4, data + 4, count - 4);
 530 }
 531
 532 static void regmap_ibt_free_context(void *context)
 533 {
 534         kfree(context);
 535 }
 536
 537 static struct regmap_bus regmap_ibt = {
 538         .read = regmap_ibt_read,
 539         .write = regmap_ibt_write,
 540         .gather_write = regmap_ibt_gather_write,
 541         .free_context = regmap_ibt_free_context,
 542         .reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
 543         .val_format_endian_default = REGMAP_ENDIAN_LITTLE,
 544 };
 545
 546 /* Config is the same for all register regions */
 547 static const struct regmap_config regmap_ibt_cfg = {
 548         .name      = "btintel_regmap",
 549         .reg_bits  = 32,
 550         .val_bits  = 32,
 551 };
 552
 553 struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read,
 554                                    u16 opcode_write)
 555 {
 556         struct regmap_ibt_context *ctx;
 557
 558         bt_dev_info(hdev, "regmap: Init R%x-W%x region", opcode_read,
 559                     opcode_write);
 560
 561         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 562         if (!ctx)
 563                 return ERR_PTR(-ENOMEM);
 564
 565         ctx->op_read = opcode_read;
 566         ctx->op_write = opcode_write;
 567         ctx->hdev = hdev;
 568
 569         return regmap_init(&hdev->dev, &regmap_ibt, ctx, &regmap_ibt_cfg);
 570 }
 571 EXPORT_SYMBOL_GPL(btintel_regmap_init);
 572
 573 int btintel_send_intel_reset(struct hci_dev *hdev, u32 boot_param)
 574 {
 575         struct intel_reset params = { 0x00, 0x01, 0x00, 0x01, 0x00000000 };
 576         struct sk_buff *skb;
 577
 578         params.boot_param = cpu_to_le32(boot_param);
 579
 580         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(params), &params,
 581                              HCI_INIT_TIMEOUT);
 582         if (IS_ERR(skb)) {
 583                 bt_dev_err(hdev, "Failed to send Intel Reset command");
 584                 return PTR_ERR(skb);
 585         }
 586
 587         kfree_skb(skb);
 588
 589         return 0;
 590 }
 591 EXPORT_SYMBOL_GPL(btintel_send_intel_reset);
 592
 593 int btintel_read_boot_params(struct hci_dev *hdev,
 594                              struct intel_boot_params *params)
 595 {
 596         struct sk_buff *skb;
 597
 598         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
 599         if (IS_ERR(skb)) {
 600                 bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)",
 601                            PTR_ERR(skb));
 602                 return PTR_ERR(skb);
 603         }
 604
 605         if (skb->len != sizeof(*params)) {
 606                 bt_dev_err(hdev, "Intel boot parameters size mismatch");
 607                 kfree_skb(skb);
 608                 return -EILSEQ;
 609         }
 610
 611         memcpy(params, skb->data, sizeof(*params));
 612
 613         kfree_skb(skb);
 614
 615         if (params->status) {
 616                 bt_dev_err(hdev, "Intel boot parameters command failed (%02x)",
 617                            params->status);
 618                 return -bt_to_errno(params->status);
 619         }
 620
 621         bt_dev_info(hdev, "Device revision is %u",
 622                     le16_to_cpu(params->dev_revid));
 623
 624         bt_dev_info(hdev, "Secure boot is %s",
 625                     params->secure_boot ? "enabled" : "disabled");
 626
 627         bt_dev_info(hdev, "OTP lock is %s",
 628                     params->otp_lock ? "enabled" : "disabled");
 629
 630         bt_dev_info(hdev, "API lock is %s",
 631                     params->api_lock ? "enabled" : "disabled");
 632
 633         bt_dev_info(hdev, "Debug lock is %s",
 634                     params->debug_lock ? "enabled" : "disabled");
 635
 636         bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
 637                     params->min_fw_build_nn, params->min_fw_build_cw,
 638                     2000 + params->min_fw_build_yy);
 639
 640         return 0;
 641 }
 642 EXPORT_SYMBOL_GPL(btintel_read_boot_params);
 643
 644 int btintel_download_firmware(struct hci_dev *hdev, const struct firmware *fw,
 645                               u32 *boot_param)
 646 {
 647         int err;
 648         const u8 *fw_ptr;
 649         u32 frag_len;
 650
 651         /* Start the firmware download transaction with the Init fragment
 652          * represented by the 128 bytes of CSS header.
 653          */
 654         err = btintel_secure_send(hdev, 0x00, 128, fw->data);
 655         if (err < 0) {
 656                 bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
 657                 goto done;
 658         }
 659
 660         /* Send the 256 bytes of public key information from the firmware
 661          * as the PKey fragment.
 662          */
 663         err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
 664         if (err < 0) {
 665                 bt_dev_err(hdev, "Failed to send firmware pkey (%d)", err);
 666                 goto done;
 667         }
 668
 669         /* Send the 256 bytes of signature information from the firmware
 670          * as the Sign fragment.
 671          */
 672         err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
 673         if (err < 0) {
 674                 bt_dev_err(hdev, "Failed to send firmware signature (%d)", err);
 675                 goto done;
 676         }
 677
 678         fw_ptr = fw->data + 644;
 679         frag_len = 0;
 680
 681         while (fw_ptr - fw->data < fw->size) {
 682                 struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
 683
 684                 /* Each SKU has a different reset parameter to use in the
 685                  * HCI_Intel_Reset command and it is embedded in the firmware
 686                  * data. So, instead of using static value per SKU, check
 687                  * the firmware data and save it for later use.
 688                  */
 689                 if (le16_to_cpu(cmd->opcode) == 0xfc0e) {
 690                         /* The boot parameter is the first 32-bit value
 691                          * and rest of 3 octets are reserved.
 692                          */
 693                         *boot_param = get_unaligned_le32(fw_ptr + sizeof(*cmd));
 694
 695                         bt_dev_dbg(hdev, "boot_param=0x%x", *boot_param);
 696                 }
 697
 698                 frag_len += sizeof(*cmd) + cmd->plen;
 699
 700                 /* The parameter length of the secure send command requires
 701                  * a 4 byte alignment. It happens so that the firmware file
 702                  * contains proper Intel_NOP commands to align the fragments
 703                  * as needed.
 704                  *
 705                  * Send set of commands with 4 byte alignment from the
 706                  * firmware data buffer as a single Data fragement.
 707                  */
 708                 if (!(frag_len % 4)) {
 709                         err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
 710                         if (err < 0) {
 711                                 bt_dev_err(hdev,
 712                                            "Failed to send firmware data (%d)",
 713                                            err);
 714                                 goto done;
 715                         }
 716
 717                         fw_ptr += frag_len;
 718                         frag_len = 0;
 719                 }
 720         }
 721
 722 done:
 723         return err;
 724 }
 725 EXPORT_SYMBOL_GPL(btintel_download_firmware);
 726
 727 MODULE_AUTHOR("Marcel Holtmann <[email protected]>");
 728 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
 729 MODULE_VERSION(VERSION);
 730 MODULE_LICENSE("GPL");
 731 MODULE_FIRMWARE("intel/ibt-11-5.sfi");
 732 MODULE_FIRMWARE("intel/ibt-11-5.ddc");
 733 MODULE_FIRMWARE("intel/ibt-12-16.sfi");
 734 MODULE_FIRMWARE("intel/ibt-12-16.ddc");