drivers/bluetooth/btintel.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *  Bluetooth support for Intel devices
   5  *
   6  *  Copyright (C) 2015  Intel Corporation
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/firmware.h>
  11 #include <linux/regmap.h>
  12 #include <asm/unaligned.h>
  13
  14 #include <net/bluetooth/bluetooth.h>
  15 #include <net/bluetooth/hci_core.h>
  16
  17 #include "btintel.h"
  18
  19 #define VERSION "0.1"
  20
  21 #define BDADDR_INTEL            (&(bdaddr_t){{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
  22 #define RSA_HEADER_LEN          644
  23 #define CSS_HEADER_OFFSET       8
  24 #define ECDSA_OFFSET            644
  25 #define ECDSA_HEADER_LEN        320
  26
  27 int btintel_check_bdaddr(struct hci_dev *hdev)
  28 {
  29         struct hci_rp_read_bd_addr *bda;
  30         struct sk_buff *skb;
  31
  32         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
  33                              HCI_INIT_TIMEOUT);
  34         if (IS_ERR(skb)) {
  35                 int err = PTR_ERR(skb);
  36                 bt_dev_err(hdev, "Reading Intel device address failed (%d)",
  37                            err);
  38                 return err;
  39         }
  40
  41         if (skb->len != sizeof(*bda)) {
  42                 bt_dev_err(hdev, "Intel device address length mismatch");
  43                 kfree_skb(skb);
  44                 return -EIO;
  45         }
  46
  47         bda = (struct hci_rp_read_bd_addr *)skb->data;
  48
  49         /* For some Intel based controllers, the default Bluetooth device
  50          * address 00:03:19:9E:8B:00 can be found. These controllers are
  51          * fully operational, but have the danger of duplicate addresses
  52          * and that in turn can cause problems with Bluetooth operation.
  53          */
  54         if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) {
  55                 bt_dev_err(hdev, "Found Intel default device address (%pMR)",
  56                            &bda->bdaddr);
  57                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  58         }
  59
  60         kfree_skb(skb);
  61
  62         return 0;
  63 }
  64 EXPORT_SYMBOL_GPL(btintel_check_bdaddr);
  65
  66 int btintel_enter_mfg(struct hci_dev *hdev)
  67 {
  68         static const u8 param[] = { 0x01, 0x00 };
  69         struct sk_buff *skb;
  70
  71         skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
  72         if (IS_ERR(skb)) {
  73                 bt_dev_err(hdev, "Entering manufacturer mode failed (%ld)",
  74                            PTR_ERR(skb));
  75                 return PTR_ERR(skb);
  76         }
  77         kfree_skb(skb);
  78
  79         return 0;
  80 }
  81 EXPORT_SYMBOL_GPL(btintel_enter_mfg);
  82
  83 int btintel_exit_mfg(struct hci_dev *hdev, bool reset, bool patched)
  84 {
  85         u8 param[] = { 0x00, 0x00 };
  86         struct sk_buff *skb;
  87
  88         /* The 2nd command parameter specifies the manufacturing exit method:
  89          * 0x00: Just disable the manufacturing mode (0x00).
  90          * 0x01: Disable manufacturing mode and reset with patches deactivated.
  91          * 0x02: Disable manufacturing mode and reset with patches activated.
  92          */
  93         if (reset)
  94                 param[1] |= patched ? 0x02 : 0x01;
  95
  96         skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_CMD_TIMEOUT);
  97         if (IS_ERR(skb)) {
  98                 bt_dev_err(hdev, "Exiting manufacturer mode failed (%ld)",
  99                            PTR_ERR(skb));
 100                 return PTR_ERR(skb);
 101         }
 102         kfree_skb(skb);
 103
 104         return 0;
 105 }
 106 EXPORT_SYMBOL_GPL(btintel_exit_mfg);
 107
 108 int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 109 {
 110         struct sk_buff *skb;
 111         int err;
 112
 113         skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
 114         if (IS_ERR(skb)) {
 115                 err = PTR_ERR(skb);
 116                 bt_dev_err(hdev, "Changing Intel device address failed (%d)",
 117                            err);
 118                 return err;
 119         }
 120         kfree_skb(skb);
 121
 122         return 0;
 123 }
 124 EXPORT_SYMBOL_GPL(btintel_set_bdaddr);
 125
 126 int btintel_set_diag(struct hci_dev *hdev, bool enable)
 127 {
 128         struct sk_buff *skb;
 129         u8 param[3];
 130         int err;
 131
 132         if (enable) {
 133                 param[0] = 0x03;
 134                 param[1] = 0x03;
 135                 param[2] = 0x03;
 136         } else {
 137                 param[0] = 0x00;
 138                 param[1] = 0x00;
 139                 param[2] = 0x00;
 140         }
 141
 142         skb = __hci_cmd_sync(hdev, 0xfc43, 3, param, HCI_INIT_TIMEOUT);
 143         if (IS_ERR(skb)) {
 144                 err = PTR_ERR(skb);
 145                 if (err == -ENODATA)
 146                         goto done;
 147                 bt_dev_err(hdev, "Changing Intel diagnostic mode failed (%d)",
 148                            err);
 149                 return err;
 150         }
 151         kfree_skb(skb);
 152
 153 done:
 154         btintel_set_event_mask(hdev, enable);
 155         return 0;
 156 }
 157 EXPORT_SYMBOL_GPL(btintel_set_diag);
 158
 159 int btintel_set_diag_mfg(struct hci_dev *hdev, bool enable)
 160 {
 161         int err, ret;
 162
 163         err = btintel_enter_mfg(hdev);
 164         if (err)
 165                 return err;
 166
 167         ret = btintel_set_diag(hdev, enable);
 168
 169         err = btintel_exit_mfg(hdev, false, false);
 170         if (err)
 171                 return err;
 172
 173         return ret;
 174 }
 175 EXPORT_SYMBOL_GPL(btintel_set_diag_mfg);
 176
 177 void btintel_hw_error(struct hci_dev *hdev, u8 code)
 178 {
 179         struct sk_buff *skb;
 180         u8 type = 0x00;
 181
 182         bt_dev_err(hdev, "Hardware error 0x%2.2x", code);
 183
 184         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 185         if (IS_ERR(skb)) {
 186                 bt_dev_err(hdev, "Reset after hardware error failed (%ld)",
 187                            PTR_ERR(skb));
 188                 return;
 189         }
 190         kfree_skb(skb);
 191
 192         skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
 193         if (IS_ERR(skb)) {
 194                 bt_dev_err(hdev, "Retrieving Intel exception info failed (%ld)",
 195                            PTR_ERR(skb));
 196                 return;
 197         }
 198
 199         if (skb->len != 13) {
 200                 bt_dev_err(hdev, "Exception info size mismatch");
 201                 kfree_skb(skb);
 202                 return;
 203         }
 204
 205         bt_dev_err(hdev, "Exception info %s", (char *)(skb->data + 1));
 206
 207         kfree_skb(skb);
 208 }
 209 EXPORT_SYMBOL_GPL(btintel_hw_error);
 210
 211 void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver)
 212 {
 213         const char *variant;
 214
 215         switch (ver->fw_variant) {
 216         case 0x06:
 217                 variant = "Bootloader";
 218                 break;
 219         case 0x23:
 220                 variant = "Firmware";
 221                 break;
 222         default:
 223                 return;
 224         }
 225
 226         bt_dev_info(hdev, "%s revision %u.%u build %u week %u %u",
 227                     variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f,
 228                     ver->fw_build_num, ver->fw_build_ww,
 229                     2000 + ver->fw_build_yy);
 230 }
 231 EXPORT_SYMBOL_GPL(btintel_version_info);
 232
 233 int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
 234                         const void *param)
 235 {
 236         while (plen > 0) {
 237                 struct sk_buff *skb;
 238                 u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;
 239
 240                 cmd_param[0] = fragment_type;
 241                 memcpy(cmd_param + 1, param, fragment_len);
 242
 243                 skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
 244                                      cmd_param, HCI_INIT_TIMEOUT);
 245                 if (IS_ERR(skb))
 246                         return PTR_ERR(skb);
 247
 248                 kfree_skb(skb);
 249
 250                 plen -= fragment_len;
 251                 param += fragment_len;
 252         }
 253
 254         return 0;
 255 }
 256 EXPORT_SYMBOL_GPL(btintel_secure_send);
 257
 258 int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name)
 259 {
 260         const struct firmware *fw;
 261         struct sk_buff *skb;
 262         const u8 *fw_ptr;
 263         int err;
 264
 265         err = request_firmware_direct(&fw, ddc_name, &hdev->dev);
 266         if (err < 0) {
 267                 bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)",
 268                            ddc_name, err);
 269                 return err;
 270         }
 271
 272         bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name);
 273
 274         fw_ptr = fw->data;
 275
 276         /* DDC file contains one or more DDC structure which has
 277          * Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2).
 278          */
 279         while (fw->size > fw_ptr - fw->data) {
 280                 u8 cmd_plen = fw_ptr[0] + sizeof(u8);
 281
 282                 skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr,
 283                                      HCI_INIT_TIMEOUT);
 284                 if (IS_ERR(skb)) {
 285                         bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)",
 286                                    PTR_ERR(skb));
 287                         release_firmware(fw);
 288                         return PTR_ERR(skb);
 289                 }
 290
 291                 fw_ptr += cmd_plen;
 292                 kfree_skb(skb);
 293         }
 294
 295         release_firmware(fw);
 296
 297         bt_dev_info(hdev, "Applying Intel DDC parameters completed");
 298
 299         return 0;
 300 }
 301 EXPORT_SYMBOL_GPL(btintel_load_ddc_config);
 302
 303 int btintel_set_event_mask(struct hci_dev *hdev, bool debug)
 304 {
 305         u8 mask[8] = { 0x87, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 306         struct sk_buff *skb;
 307         int err;
 308
 309         if (debug)
 310                 mask[1] |= 0x62;
 311
 312         skb = __hci_cmd_sync(hdev, 0xfc52, 8, mask, HCI_INIT_TIMEOUT);
 313         if (IS_ERR(skb)) {
 314                 err = PTR_ERR(skb);
 315                 bt_dev_err(hdev, "Setting Intel event mask failed (%d)", err);
 316                 return err;
 317         }
 318         kfree_skb(skb);
 319
 320         return 0;
 321 }
 322 EXPORT_SYMBOL_GPL(btintel_set_event_mask);
 323
 324 int btintel_set_event_mask_mfg(struct hci_dev *hdev, bool debug)
 325 {
 326         int err, ret;
 327
 328         err = btintel_enter_mfg(hdev);
 329         if (err)
 330                 return err;
 331
 332         ret = btintel_set_event_mask(hdev, debug);
 333
 334         err = btintel_exit_mfg(hdev, false, false);
 335         if (err)
 336                 return err;
 337
 338         return ret;
 339 }
 340 EXPORT_SYMBOL_GPL(btintel_set_event_mask_mfg);
 341
 342 int btintel_read_version(struct hci_dev *hdev, struct intel_version *ver)
 343 {
 344         struct sk_buff *skb;
 345
 346         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
 347         if (IS_ERR(skb)) {
 348                 bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
 349                            PTR_ERR(skb));
 350                 return PTR_ERR(skb);
 351         }
 352
 353         if (skb->len != sizeof(*ver)) {
 354                 bt_dev_err(hdev, "Intel version event size mismatch");
 355                 kfree_skb(skb);
 356                 return -EILSEQ;
 357         }
 358
 359         memcpy(ver, skb->data, sizeof(*ver));
 360
 361         kfree_skb(skb);
 362
 363         return 0;
 364 }
 365 EXPORT_SYMBOL_GPL(btintel_read_version);
 366
 367 void btintel_version_info_tlv(struct hci_dev *hdev, struct intel_version_tlv *version)
 368 {
 369         const char *variant;
 370
 371         switch (version->img_type) {
 372         case 0x01:
 373                 variant = "Bootloader";
 374                 bt_dev_info(hdev, "Device revision is %u", version->dev_rev_id);
 375                 bt_dev_info(hdev, "Secure boot is %s",
 376                             version->secure_boot ? "enabled" : "disabled");
 377                 bt_dev_info(hdev, "OTP lock is %s",
 378                             version->otp_lock ? "enabled" : "disabled");
 379                 bt_dev_info(hdev, "API lock is %s",
 380                             version->api_lock ? "enabled" : "disabled");
 381                 bt_dev_info(hdev, "Debug lock is %s",
 382                             version->debug_lock ? "enabled" : "disabled");
 383                 bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
 384                             version->min_fw_build_nn, version->min_fw_build_cw,
 385                             2000 + version->min_fw_build_yy);
 386                 break;
 387         case 0x03:
 388                 variant = "Firmware";
 389                 break;
 390         default:
 391                 bt_dev_err(hdev, "Unsupported image type(%02x)", version->img_type);
 392                 goto done;
 393         }
 394
 395         bt_dev_info(hdev, "%s timestamp %u.%u buildtype %u build %u", variant,
 396                     2000 + (version->timestamp >> 8), version->timestamp & 0xff,
 397                     version->build_type, version->build_num);
 398
 399 done:
 400         return;
 401 }
 402 EXPORT_SYMBOL_GPL(btintel_version_info_tlv);
 403
 404 int btintel_read_version_tlv(struct hci_dev *hdev, struct intel_version_tlv *version)
 405 {
 406         struct sk_buff *skb;
 407         const u8 param[1] = { 0xFF };
 408
 409         if (!version)
 410                 return -EINVAL;
 411
 412         skb = __hci_cmd_sync(hdev, 0xfc05, 1, param, HCI_CMD_TIMEOUT);
 413         if (IS_ERR(skb)) {
 414                 bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
 415                            PTR_ERR(skb));
 416                 return PTR_ERR(skb);
 417         }
 418
 419         if (skb->data[0]) {
 420                 bt_dev_err(hdev, "Intel Read Version command failed (%02x)",
 421                            skb->data[0]);
 422                 kfree_skb(skb);
 423                 return -EIO;
 424         }
 425
 426         /* Consume Command Complete Status field */
 427         skb_pull(skb, 1);
 428
 429         /* Event parameters contatin multiple TLVs. Read each of them
 430          * and only keep the required data. Also, it use existing legacy
 431          * version field like hw_platform, hw_variant, and fw_variant
 432          * to keep the existing setup flow
 433          */
 434         while (skb->len) {
 435                 struct intel_tlv *tlv;
 436
 437                 tlv = (struct intel_tlv *)skb->data;
 438                 switch (tlv->type) {
 439                 case INTEL_TLV_CNVI_TOP:
 440                         version->cnvi_top = get_unaligned_le32(tlv->val);
 441                         break;
 442                 case INTEL_TLV_CNVR_TOP:
 443                         version->cnvr_top = get_unaligned_le32(tlv->val);
 444                         break;
 445                 case INTEL_TLV_CNVI_BT:
 446                         version->cnvi_bt = get_unaligned_le32(tlv->val);
 447                         break;
 448                 case INTEL_TLV_CNVR_BT:
 449                         version->cnvr_bt = get_unaligned_le32(tlv->val);
 450                         break;
 451                 case INTEL_TLV_DEV_REV_ID:
 452                         version->dev_rev_id = get_unaligned_le16(tlv->val);
 453                         break;
 454                 case INTEL_TLV_IMAGE_TYPE:
 455                         version->img_type = tlv->val[0];
 456                         break;
 457                 case INTEL_TLV_TIME_STAMP:
 458                         version->timestamp = get_unaligned_le16(tlv->val);
 459                         break;
 460                 case INTEL_TLV_BUILD_TYPE:
 461                         version->build_type = tlv->val[0];
 462                         break;
 463                 case INTEL_TLV_BUILD_NUM:
 464                         version->build_num = get_unaligned_le32(tlv->val);
 465                         break;
 466                 case INTEL_TLV_SECURE_BOOT:
 467                         version->secure_boot = tlv->val[0];
 468                         break;
 469                 case INTEL_TLV_OTP_LOCK:
 470                         version->otp_lock = tlv->val[0];
 471                         break;
 472                 case INTEL_TLV_API_LOCK:
 473                         version->api_lock = tlv->val[0];
 474                         break;
 475                 case INTEL_TLV_DEBUG_LOCK:
 476                         version->debug_lock = tlv->val[0];
 477                         break;
 478                 case INTEL_TLV_MIN_FW:
 479                         version->min_fw_build_nn = tlv->val[0];
 480                         version->min_fw_build_cw = tlv->val[1];
 481                         version->min_fw_build_yy = tlv->val[2];
 482                         break;
 483                 case INTEL_TLV_LIMITED_CCE:
 484                         version->limited_cce = tlv->val[0];
 485                         break;
 486                 case INTEL_TLV_SBE_TYPE:
 487                         version->sbe_type = tlv->val[0];
 488                         break;
 489                 case INTEL_TLV_OTP_BDADDR:
 490                         memcpy(&version->otp_bd_addr, tlv->val, tlv->len);
 491                         break;
 492                 default:
 493                         /* Ignore rest of information */
 494                         break;
 495                 }
 496                 /* consume the current tlv and move to next*/
 497                 skb_pull(skb, tlv->len + sizeof(*tlv));
 498         }
 499
 500         kfree_skb(skb);
 501         return 0;
 502 }
 503 EXPORT_SYMBOL_GPL(btintel_read_version_tlv);
 504
 505 /* ------- REGMAP IBT SUPPORT ------- */
 506
 507 #define IBT_REG_MODE_8BIT  0x00
 508 #define IBT_REG_MODE_16BIT 0x01
 509 #define IBT_REG_MODE_32BIT 0x02
 510
 511 struct regmap_ibt_context {
 512         struct hci_dev *hdev;
 513         __u16 op_write;
 514         __u16 op_read;
 515 };
 516
 517 struct ibt_cp_reg_access {
 518         __le32  addr;
 519         __u8    mode;
 520         __u8    len;
 521         __u8    data[];
 522 } __packed;
 523
 524 struct ibt_rp_reg_access {
 525         __u8    status;
 526         __le32  addr;
 527         __u8    data[];
 528 } __packed;
 529
 530 static int regmap_ibt_read(void *context, const void *addr, size_t reg_size,
 531                            void *val, size_t val_size)
 532 {
 533         struct regmap_ibt_context *ctx = context;
 534         struct ibt_cp_reg_access cp;
 535         struct ibt_rp_reg_access *rp;
 536         struct sk_buff *skb;
 537         int err = 0;
 538
 539         if (reg_size != sizeof(__le32))
 540                 return -EINVAL;
 541
 542         switch (val_size) {
 543         case 1:
 544                 cp.mode = IBT_REG_MODE_8BIT;
 545                 break;
 546         case 2:
 547                 cp.mode = IBT_REG_MODE_16BIT;
 548                 break;
 549         case 4:
 550                 cp.mode = IBT_REG_MODE_32BIT;
 551                 break;
 552         default:
 553                 return -EINVAL;
 554         }
 555
 556         /* regmap provides a little-endian formatted addr */
 557         cp.addr = *(__le32 *)addr;
 558         cp.len = val_size;
 559
 560         bt_dev_dbg(ctx->hdev, "Register (0x%x) read", le32_to_cpu(cp.addr));
 561
 562         skb = hci_cmd_sync(ctx->hdev, ctx->op_read, sizeof(cp), &cp,
 563                            HCI_CMD_TIMEOUT);
 564         if (IS_ERR(skb)) {
 565                 err = PTR_ERR(skb);
 566                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error (%d)",
 567                            le32_to_cpu(cp.addr), err);
 568                 return err;
 569         }
 570
 571         if (skb->len != sizeof(*rp) + val_size) {
 572                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad len",
 573                            le32_to_cpu(cp.addr));
 574                 err = -EINVAL;
 575                 goto done;
 576         }
 577
 578         rp = (struct ibt_rp_reg_access *)skb->data;
 579
 580         if (rp->addr != cp.addr) {
 581                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad addr",
 582                            le32_to_cpu(rp->addr));
 583                 err = -EINVAL;
 584                 goto done;
 585         }
 586
 587         memcpy(val, rp->data, val_size);
 588
 589 done:
 590         kfree_skb(skb);
 591         return err;
 592 }
 593
 594 static int regmap_ibt_gather_write(void *context,
 595                                    const void *addr, size_t reg_size,
 596                                    const void *val, size_t val_size)
 597 {
 598         struct regmap_ibt_context *ctx = context;
 599         struct ibt_cp_reg_access *cp;
 600         struct sk_buff *skb;
 601         int plen = sizeof(*cp) + val_size;
 602         u8 mode;
 603         int err = 0;
 604
 605         if (reg_size != sizeof(__le32))
 606                 return -EINVAL;
 607
 608         switch (val_size) {
 609         case 1:
 610                 mode = IBT_REG_MODE_8BIT;
 611                 break;
 612         case 2:
 613                 mode = IBT_REG_MODE_16BIT;
 614                 break;
 615         case 4:
 616                 mode = IBT_REG_MODE_32BIT;
 617                 break;
 618         default:
 619                 return -EINVAL;
 620         }
 621
 622         cp = kmalloc(plen, GFP_KERNEL);
 623         if (!cp)
 624                 return -ENOMEM;
 625
 626         /* regmap provides a little-endian formatted addr/value */
 627         cp->addr = *(__le32 *)addr;
 628         cp->mode = mode;
 629         cp->len = val_size;
 630         memcpy(&cp->data, val, val_size);
 631
 632         bt_dev_dbg(ctx->hdev, "Register (0x%x) write", le32_to_cpu(cp->addr));
 633
 634         skb = hci_cmd_sync(ctx->hdev, ctx->op_write, plen, cp, HCI_CMD_TIMEOUT);
 635         if (IS_ERR(skb)) {
 636                 err = PTR_ERR(skb);
 637                 bt_dev_err(ctx->hdev, "regmap: Register (0x%x) write error (%d)",
 638                            le32_to_cpu(cp->addr), err);
 639                 goto done;
 640         }
 641         kfree_skb(skb);
 642
 643 done:
 644         kfree(cp);
 645         return err;
 646 }
 647
 648 static int regmap_ibt_write(void *context, const void *data, size_t count)
 649 {
 650         /* data contains register+value, since we only support 32bit addr,
 651          * minimum data size is 4 bytes.
 652          */
 653         if (WARN_ONCE(count < 4, "Invalid register access"))
 654                 return -EINVAL;
 655
 656         return regmap_ibt_gather_write(context, data, 4, data + 4, count - 4);
 657 }
 658
 659 static void regmap_ibt_free_context(void *context)
 660 {
 661         kfree(context);
 662 }
 663
 664 static struct regmap_bus regmap_ibt = {
 665         .read = regmap_ibt_read,
 666         .write = regmap_ibt_write,
 667         .gather_write = regmap_ibt_gather_write,
 668         .free_context = regmap_ibt_free_context,
 669         .reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
 670         .val_format_endian_default = REGMAP_ENDIAN_LITTLE,
 671 };
 672
 673 /* Config is the same for all register regions */
 674 static const struct regmap_config regmap_ibt_cfg = {
 675         .name      = "btintel_regmap",
 676         .reg_bits  = 32,
 677         .val_bits  = 32,
 678 };
 679
 680 struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read,
 681                                    u16 opcode_write)
 682 {
 683         struct regmap_ibt_context *ctx;
 684
 685         bt_dev_info(hdev, "regmap: Init R%x-W%x region", opcode_read,
 686                     opcode_write);
 687
 688         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 689         if (!ctx)
 690                 return ERR_PTR(-ENOMEM);
 691
 692         ctx->op_read = opcode_read;
 693         ctx->op_write = opcode_write;
 694         ctx->hdev = hdev;
 695
 696         return regmap_init(&hdev->dev, &regmap_ibt, ctx, &regmap_ibt_cfg);
 697 }
 698 EXPORT_SYMBOL_GPL(btintel_regmap_init);
 699
 700 int btintel_send_intel_reset(struct hci_dev *hdev, u32 boot_param)
 701 {
 702         struct intel_reset params = { 0x00, 0x01, 0x00, 0x01, 0x00000000 };
 703         struct sk_buff *skb;
 704
 705         params.boot_param = cpu_to_le32(boot_param);
 706
 707         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(params), &params,
 708                              HCI_INIT_TIMEOUT);
 709         if (IS_ERR(skb)) {
 710                 bt_dev_err(hdev, "Failed to send Intel Reset command");
 711                 return PTR_ERR(skb);
 712         }
 713
 714         kfree_skb(skb);
 715
 716         return 0;
 717 }
 718 EXPORT_SYMBOL_GPL(btintel_send_intel_reset);
 719
 720 int btintel_read_boot_params(struct hci_dev *hdev,
 721                              struct intel_boot_params *params)
 722 {
 723         struct sk_buff *skb;
 724
 725         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
 726         if (IS_ERR(skb)) {
 727                 bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)",
 728                            PTR_ERR(skb));
 729                 return PTR_ERR(skb);
 730         }
 731
 732         if (skb->len != sizeof(*params)) {
 733                 bt_dev_err(hdev, "Intel boot parameters size mismatch");
 734                 kfree_skb(skb);
 735                 return -EILSEQ;
 736         }
 737
 738         memcpy(params, skb->data, sizeof(*params));
 739
 740         kfree_skb(skb);
 741
 742         if (params->status) {
 743                 bt_dev_err(hdev, "Intel boot parameters command failed (%02x)",
 744                            params->status);
 745                 return -bt_to_errno(params->status);
 746         }
 747
 748         bt_dev_info(hdev, "Device revision is %u",
 749                     le16_to_cpu(params->dev_revid));
 750
 751         bt_dev_info(hdev, "Secure boot is %s",
 752                     params->secure_boot ? "enabled" : "disabled");
 753
 754         bt_dev_info(hdev, "OTP lock is %s",
 755                     params->otp_lock ? "enabled" : "disabled");
 756
 757         bt_dev_info(hdev, "API lock is %s",
 758                     params->api_lock ? "enabled" : "disabled");
 759
 760         bt_dev_info(hdev, "Debug lock is %s",
 761                     params->debug_lock ? "enabled" : "disabled");
 762
 763         bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
 764                     params->min_fw_build_nn, params->min_fw_build_cw,
 765                     2000 + params->min_fw_build_yy);
 766
 767         return 0;
 768 }
 769 EXPORT_SYMBOL_GPL(btintel_read_boot_params);
 770
 771 static int btintel_sfi_rsa_header_secure_send(struct hci_dev *hdev,
 772                                               const struct firmware *fw)
 773 {
 774         int err;
 775
 776         /* Start the firmware download transaction with the Init fragment
 777          * represented by the 128 bytes of CSS header.
 778          */
 779         err = btintel_secure_send(hdev, 0x00, 128, fw->data);
 780         if (err < 0) {
 781                 bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
 782                 goto done;
 783         }
 784
 785         /* Send the 256 bytes of public key information from the firmware
 786          * as the PKey fragment.
 787          */
 788         err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
 789         if (err < 0) {
 790                 bt_dev_err(hdev, "Failed to send firmware pkey (%d)", err);
 791                 goto done;
 792         }
 793
 794         /* Send the 256 bytes of signature information from the firmware
 795          * as the Sign fragment.
 796          */
 797         err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
 798         if (err < 0) {
 799                 bt_dev_err(hdev, "Failed to send firmware signature (%d)", err);
 800                 goto done;
 801         }
 802
 803 done:
 804         return err;
 805 }
 806
 807 static int btintel_sfi_ecdsa_header_secure_send(struct hci_dev *hdev,
 808                                                 const struct firmware *fw)
 809 {
 810         int err;
 811
 812         /* Start the firmware download transaction with the Init fragment
 813          * represented by the 128 bytes of CSS header.
 814          */
 815         err = btintel_secure_send(hdev, 0x00, 128, fw->data + 644);
 816         if (err < 0) {
 817                 bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
 818                 return err;
 819         }
 820
 821         /* Send the 96 bytes of public key information from the firmware
 822          * as the PKey fragment.
 823          */
 824         err = btintel_secure_send(hdev, 0x03, 96, fw->data + 644 + 128);
 825         if (err < 0) {
 826                 bt_dev_err(hdev, "Failed to send firmware pkey (%d)", err);
 827                 return err;
 828         }
 829
 830         /* Send the 96 bytes of signature information from the firmware
 831          * as the Sign fragment
 832          */
 833         err = btintel_secure_send(hdev, 0x02, 96, fw->data + 644 + 224);
 834         if (err < 0) {
 835                 bt_dev_err(hdev, "Failed to send firmware signature (%d)",
 836                            err);
 837                 return err;
 838         }
 839         return 0;
 840 }
 841
 842 static int btintel_download_firmware_payload(struct hci_dev *hdev,
 843                                              const struct firmware *fw,
 844                                              u32 *boot_param, size_t offset)
 845 {
 846         int err;
 847         const u8 *fw_ptr;
 848         u32 frag_len;
 849
 850         fw_ptr = fw->data + offset;
 851         frag_len = 0;
 852         err = -EINVAL;
 853
 854         while (fw_ptr - fw->data < fw->size) {
 855                 struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
 856
 857                 /* Each SKU has a different reset parameter to use in the
 858                  * HCI_Intel_Reset command and it is embedded in the firmware
 859                  * data. So, instead of using static value per SKU, check
 860                  * the firmware data and save it for later use.
 861                  */
 862                 if (le16_to_cpu(cmd->opcode) == 0xfc0e) {
 863                         /* The boot parameter is the first 32-bit value
 864                          * and rest of 3 octets are reserved.
 865                          */
 866                         *boot_param = get_unaligned_le32(fw_ptr + sizeof(*cmd));
 867
 868                         bt_dev_dbg(hdev, "boot_param=0x%x", *boot_param);
 869                 }
 870
 871                 frag_len += sizeof(*cmd) + cmd->plen;
 872
 873                 /* The parameter length of the secure send command requires
 874                  * a 4 byte alignment. It happens so that the firmware file
 875                  * contains proper Intel_NOP commands to align the fragments
 876                  * as needed.
 877                  *
 878                  * Send set of commands with 4 byte alignment from the
 879                  * firmware data buffer as a single Data fragement.
 880                  */
 881                 if (!(frag_len % 4)) {
 882                         err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
 883                         if (err < 0) {
 884                                 bt_dev_err(hdev,
 885                                            "Failed to send firmware data (%d)",
 886                                            err);
 887                                 goto done;
 888                         }
 889
 890                         fw_ptr += frag_len;
 891                         frag_len = 0;
 892                 }
 893         }
 894
 895 done:
 896         return err;
 897 }
 898
 899 int btintel_download_firmware(struct hci_dev *hdev,
 900                               const struct firmware *fw,
 901                               u32 *boot_param)
 902 {
 903         int err;
 904
 905         err = btintel_sfi_rsa_header_secure_send(hdev, fw);
 906         if (err)
 907                 return err;
 908
 909         return btintel_download_firmware_payload(hdev, fw, boot_param,
 910                                                  RSA_HEADER_LEN);
 911 }
 912 EXPORT_SYMBOL_GPL(btintel_download_firmware);
 913
 914 int btintel_download_firmware_newgen(struct hci_dev *hdev,
 915                                      const struct firmware *fw, u32 *boot_param,
 916                                      u8 hw_variant, u8 sbe_type)
 917 {
 918         int err;
 919         u32 css_header_ver;
 920
 921         /* iBT hardware variants 0x0b, 0x0c, 0x11, 0x12, 0x13, 0x14 support
 922          * only RSA secure boot engine. Hence, the corresponding sfi file will
 923          * have RSA header of 644 bytes followed by Command Buffer.
 924          *
 925          * iBT hardware variants 0x17, 0x18 onwards support both RSA and ECDSA
 926          * secure boot engine. As a result, the corresponding sfi file will
 927          * have RSA header of 644, ECDSA header of 320 bytes followed by
 928          * Command Buffer.
 929          *
 930          * CSS Header byte positions 0x08 to 0x0B represent the CSS Header
 931          * version: RSA(0x00010000) , ECDSA (0x00020000)
 932          */
 933         css_header_ver = get_unaligned_le32(fw->data + CSS_HEADER_OFFSET);
 934         if (css_header_ver != 0x00010000) {
 935                 bt_dev_err(hdev, "Invalid CSS Header version");
 936                 return -EINVAL;
 937         }
 938
 939         if (hw_variant <= 0x14) {
 940                 if (sbe_type != 0x00) {
 941                         bt_dev_err(hdev, "Invalid SBE type for hardware variant (%d)",
 942                                    hw_variant);
 943                         return -EINVAL;
 944                 }
 945
 946                 err = btintel_sfi_rsa_header_secure_send(hdev, fw);
 947                 if (err)
 948                         return err;
 949
 950                 err = btintel_download_firmware_payload(hdev, fw, boot_param, RSA_HEADER_LEN);
 951                 if (err)
 952                         return err;
 953         } else if (hw_variant >= 0x17) {
 954                 /* Check if CSS header for ECDSA follows the RSA header */
 955                 if (fw->data[ECDSA_OFFSET] != 0x06)
 956                         return -EINVAL;
 957
 958                 /* Check if the CSS Header version is ECDSA(0x00020000) */
 959                 css_header_ver = get_unaligned_le32(fw->data + ECDSA_OFFSET + CSS_HEADER_OFFSET);
 960                 if (css_header_ver != 0x00020000) {
 961                         bt_dev_err(hdev, "Invalid CSS Header version");
 962                         return -EINVAL;
 963                 }
 964
 965                 if (sbe_type == 0x00) {
 966                         err = btintel_sfi_rsa_header_secure_send(hdev, fw);
 967                         if (err)
 968                                 return err;
 969
 970                         err = btintel_download_firmware_payload(hdev, fw,
 971                                                                 boot_param,
 972                                                                 RSA_HEADER_LEN + ECDSA_HEADER_LEN);
 973                         if (err)
 974                                 return err;
 975                 } else if (sbe_type == 0x01) {
 976                         err = btintel_sfi_ecdsa_header_secure_send(hdev, fw);
 977                         if (err)
 978                                 return err;
 979
 980                         err = btintel_download_firmware_payload(hdev, fw,
 981                                                                 boot_param,
 982                                                                 RSA_HEADER_LEN + ECDSA_HEADER_LEN);
 983                         if (err)
 984                                 return err;
 985                 }
 986         }
 987         return 0;
 988 }
 989 EXPORT_SYMBOL_GPL(btintel_download_firmware_newgen);
 990
 991 void btintel_reset_to_bootloader(struct hci_dev *hdev)
 992 {
 993         struct intel_reset params;
 994         struct sk_buff *skb;
 995
 996         /* Send Intel Reset command. This will result in
 997          * re-enumeration of BT controller.
 998          *
 999          * Intel Reset parameter description:
1000          * reset_type :   0x00 (Soft reset),
1001          *                0x01 (Hard reset)
1002          * patch_enable : 0x00 (Do not enable),
1003          *                0x01 (Enable)
1004          * ddc_reload :   0x00 (Do not reload),
1005          *                0x01 (Reload)
1006          * boot_option:   0x00 (Current image),
1007          *                0x01 (Specified boot address)
1008          * boot_param:    Boot address
1009          *
1010          */
1011         params.reset_type = 0x01;
1012         params.patch_enable = 0x01;
1013         params.ddc_reload = 0x01;
1014         params.boot_option = 0x00;
1015         params.boot_param = cpu_to_le32(0x00000000);
1016
1017         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(params),
1018                              &params, HCI_INIT_TIMEOUT);
1019         if (IS_ERR(skb)) {
1020                 bt_dev_err(hdev, "FW download error recovery failed (%ld)",
1021                            PTR_ERR(skb));
1022                 return;
1023         }
1024         bt_dev_info(hdev, "Intel reset sent to retry FW download");
1025         kfree_skb(skb);
1026
1027         /* Current Intel BT controllers(ThP/JfP) hold the USB reset
1028          * lines for 2ms when it receives Intel Reset in bootloader mode.
1029          * Whereas, the upcoming Intel BT controllers will hold USB reset
1030          * for 150ms. To keep the delay generic, 150ms is chosen here.
1031          */
1032         msleep(150);
1033 }
1034 EXPORT_SYMBOL_GPL(btintel_reset_to_bootloader);
1035
1036 int btintel_read_debug_features(struct hci_dev *hdev,
1037                                 struct intel_debug_features *features)
1038 {
1039         struct sk_buff *skb;
1040         u8 page_no = 1;
1041
1042         /* Intel controller supports two pages, each page is of 128-bit
1043          * feature bit mask. And each bit defines specific feature support
1044          */
1045         skb = __hci_cmd_sync(hdev, 0xfca6, sizeof(page_no), &page_no,
1046                              HCI_INIT_TIMEOUT);
1047         if (IS_ERR(skb)) {
1048                 bt_dev_err(hdev, "Reading supported features failed (%ld)",
1049                            PTR_ERR(skb));
1050                 return PTR_ERR(skb);
1051         }
1052
1053         if (skb->len != (sizeof(features->page1) + 3)) {
1054                 bt_dev_err(hdev, "Supported features event size mismatch");
1055                 kfree_skb(skb);
1056                 return -EILSEQ;
1057         }
1058
1059         memcpy(features->page1, skb->data + 3, sizeof(features->page1));
1060
1061         /* Read the supported features page2 if required in future.
1062          */
1063         kfree_skb(skb);
1064         return 0;
1065 }
1066 EXPORT_SYMBOL_GPL(btintel_read_debug_features);
1067
1068 int btintel_set_debug_features(struct hci_dev *hdev,
1069                                const struct intel_debug_features *features)
1070 {
1071         u8 mask[11] = { 0x0a, 0x92, 0x02, 0x07, 0x00, 0x00, 0x00, 0x00,
1072                         0x00, 0x00, 0x00 };
1073         struct sk_buff *skb;
1074
1075         if (!features)
1076                 return -EINVAL;
1077
1078         if (!(features->page1[0] & 0x3f)) {
1079                 bt_dev_info(hdev, "Telemetry exception format not supported");
1080                 return 0;
1081         }
1082
1083         skb = __hci_cmd_sync(hdev, 0xfc8b, 11, mask, HCI_INIT_TIMEOUT);
1084         if (IS_ERR(skb)) {
1085                 bt_dev_err(hdev, "Setting Intel telemetry ddc write event mask failed (%ld)",
1086                            PTR_ERR(skb));
1087                 return PTR_ERR(skb);
1088         }
1089
1090         kfree_skb(skb);
1091         return 0;
1092 }
1093 EXPORT_SYMBOL_GPL(btintel_set_debug_features);
1094
1095 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1096 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
1097 MODULE_VERSION(VERSION);
1098 MODULE_LICENSE("GPL");
1099 MODULE_FIRMWARE("intel/ibt-11-5.sfi");
1100 MODULE_FIRMWARE("intel/ibt-11-5.ddc");
1101 MODULE_FIRMWARE("intel/ibt-12-16.sfi");
1102 MODULE_FIRMWARE("intel/ibt-12-16.ddc");