1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Bluetooth support for Realtek devices 4 * 5 * Copyright (C) 2015 Endless Mobile, Inc. 6 */ 7 8 #include <linux/module.h> 9 #include <linux/firmware.h> 10 #include <asm/unaligned.h> 11 #include <linux/usb.h> 12 13 #include <net/bluetooth/bluetooth.h> 14 #include <net/bluetooth/hci_core.h> 15 16 #include "btrtl.h" 17 18 #define VERSION "0.1" 19 20 #define RTL_EPATCH_SIGNATURE "Realtech" 21 #define RTL_ROM_LMP_3499 0x3499 22 #define RTL_ROM_LMP_8723A 0x1200 23 #define RTL_ROM_LMP_8723B 0x8723 24 #define RTL_ROM_LMP_8723D 0x8873 25 #define RTL_ROM_LMP_8821A 0x8821 26 #define RTL_ROM_LMP_8761A 0x8761 27 #define RTL_ROM_LMP_8822B 0x8822 28 #define RTL_CONFIG_MAGIC 0x8723ab55 29 30 #define IC_MATCH_FL_LMPSUBV (1 << 0) 31 #define IC_MATCH_FL_HCIREV (1 << 1) 32 #define IC_MATCH_FL_HCIVER (1 << 2) 33 #define IC_MATCH_FL_HCIBUS (1 << 3) 34 #define IC_INFO(lmps, hcir) \ 35 .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV, \ 36 .lmp_subver = (lmps), \ 37 .hci_rev = (hcir) 38 39 struct id_table { 40 __u16 match_flags; 41 __u16 lmp_subver; 42 __u16 hci_rev; 43 __u8 hci_ver; 44 __u8 hci_bus; 45 bool config_needed; 46 bool has_rom_version; 47 char *fw_name; 48 char *cfg_name; 49 }; 50 51 struct btrtl_device_info { 52 const struct id_table *ic_info; 53 u8 rom_version; 54 u8 *fw_data; 55 int fw_len; 56 u8 *cfg_data; 57 int cfg_len; 58 }; 59 60 static const struct id_table ic_id_table[] = { 61 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8723A, 0x0, 62 .config_needed = false, 63 .has_rom_version = false, 64 .fw_name = "rtl_bt/rtl8723a_fw.bin", 65 .cfg_name = NULL }, 66 67 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_3499, 0x0, 68 .config_needed = false, 69 .has_rom_version = false, 70 .fw_name = "rtl_bt/rtl8723a_fw.bin", 71 .cfg_name = NULL }, 72 73 /* 8723BS */ 74 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | 75 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, 76 .lmp_subver = RTL_ROM_LMP_8723B, 77 .hci_rev = 0xb, 78 .hci_ver = 6, 79 .hci_bus = HCI_UART, 80 .config_needed = true, 81 .has_rom_version = true, 82 .fw_name = "rtl_bt/rtl8723bs_fw.bin", 83 .cfg_name = "rtl_bt/rtl8723bs_config" }, 84 85 /* 8723B */ 86 { IC_INFO(RTL_ROM_LMP_8723B, 0xb), 87 .config_needed = false, 88 .has_rom_version = true, 89 .fw_name = "rtl_bt/rtl8723b_fw.bin", 90 .cfg_name = "rtl_bt/rtl8723b_config" }, 91 92 /* 8723D */ 93 { IC_INFO(RTL_ROM_LMP_8723B, 0xd), 94 .config_needed = true, 95 .has_rom_version = true, 96 .fw_name = "rtl_bt/rtl8723d_fw.bin", 97 .cfg_name = "rtl_bt/rtl8723d_config" }, 98 99 /* 8723DS */ 100 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | 101 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, 102 .lmp_subver = RTL_ROM_LMP_8723B, 103 .hci_rev = 0xd, 104 .hci_ver = 8, 105 .hci_bus = HCI_UART, 106 .config_needed = true, 107 .has_rom_version = true, 108 .fw_name = "rtl_bt/rtl8723ds_fw.bin", 109 .cfg_name = "rtl_bt/rtl8723ds_config" }, 110 111 /* 8723DU */ 112 { IC_INFO(RTL_ROM_LMP_8723D, 0x826C), 113 .config_needed = true, 114 .has_rom_version = true, 115 .fw_name = "rtl_bt/rtl8723d_fw.bin", 116 .cfg_name = "rtl_bt/rtl8723d_config" }, 117 118 /* 8821A */ 119 { IC_INFO(RTL_ROM_LMP_8821A, 0xa), 120 .config_needed = false, 121 .has_rom_version = true, 122 .fw_name = "rtl_bt/rtl8821a_fw.bin", 123 .cfg_name = "rtl_bt/rtl8821a_config" }, 124 125 /* 8821C */ 126 { IC_INFO(RTL_ROM_LMP_8821A, 0xc), 127 .config_needed = false, 128 .has_rom_version = true, 129 .fw_name = "rtl_bt/rtl8821c_fw.bin", 130 .cfg_name = "rtl_bt/rtl8821c_config" }, 131 132 /* 8761A */ 133 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8761A, 0x0, 134 .config_needed = false, 135 .has_rom_version = true, 136 .fw_name = "rtl_bt/rtl8761a_fw.bin", 137 .cfg_name = "rtl_bt/rtl8761a_config" }, 138 139 /* 8822C with USB interface */ 140 { IC_INFO(RTL_ROM_LMP_8822B, 0xc), 141 .config_needed = false, 142 .has_rom_version = true, 143 .fw_name = "rtl_bt/rtl8822cu_fw.bin", 144 .cfg_name = "rtl_bt/rtl8822cu_config" }, 145 146 /* 8822B */ 147 { IC_INFO(RTL_ROM_LMP_8822B, 0xb), 148 .config_needed = true, 149 .has_rom_version = true, 150 .fw_name = "rtl_bt/rtl8822b_fw.bin", 151 .cfg_name = "rtl_bt/rtl8822b_config" }, 152 }; 153 154 static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev, 155 u8 hci_ver, u8 hci_bus) 156 { 157 int i; 158 159 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) { 160 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) && 161 (ic_id_table[i].lmp_subver != lmp_subver)) 162 continue; 163 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) && 164 (ic_id_table[i].hci_rev != hci_rev)) 165 continue; 166 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) && 167 (ic_id_table[i].hci_ver != hci_ver)) 168 continue; 169 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) && 170 (ic_id_table[i].hci_bus != hci_bus)) 171 continue; 172 173 break; 174 } 175 if (i >= ARRAY_SIZE(ic_id_table)) 176 return NULL; 177 178 return &ic_id_table[i]; 179 } 180 181 static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev) 182 { 183 struct sk_buff *skb; 184 185 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, 186 HCI_INIT_TIMEOUT); 187 if (IS_ERR(skb)) { 188 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)", 189 PTR_ERR(skb)); 190 return skb; 191 } 192 193 if (skb->len != sizeof(struct hci_rp_read_local_version)) { 194 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch"); 195 kfree_skb(skb); 196 return ERR_PTR(-EIO); 197 } 198 199 return skb; 200 } 201 202 static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version) 203 { 204 struct rtl_rom_version_evt *rom_version; 205 struct sk_buff *skb; 206 207 /* Read RTL ROM version command */ 208 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT); 209 if (IS_ERR(skb)) { 210 rtl_dev_err(hdev, "Read ROM version failed (%ld)", 211 PTR_ERR(skb)); 212 return PTR_ERR(skb); 213 } 214 215 if (skb->len != sizeof(*rom_version)) { 216 rtl_dev_err(hdev, "version event length mismatch"); 217 kfree_skb(skb); 218 return -EIO; 219 } 220 221 rom_version = (struct rtl_rom_version_evt *)skb->data; 222 rtl_dev_info(hdev, "rom_version status=%x version=%x", 223 rom_version->status, rom_version->version); 224 225 *version = rom_version->version; 226 227 kfree_skb(skb); 228 return 0; 229 } 230 231 static int rtlbt_parse_firmware(struct hci_dev *hdev, 232 struct btrtl_device_info *btrtl_dev, 233 unsigned char **_buf) 234 { 235 static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 }; 236 struct rtl_epatch_header *epatch_info; 237 unsigned char *buf; 238 int i, len; 239 size_t min_size; 240 u8 opcode, length, data; 241 int project_id = -1; 242 const unsigned char *fwptr, *chip_id_base; 243 const unsigned char *patch_length_base, *patch_offset_base; 244 u32 patch_offset = 0; 245 u16 patch_length, num_patches; 246 static const struct { 247 __u16 lmp_subver; 248 __u8 id; 249 } project_id_to_lmp_subver[] = { 250 { RTL_ROM_LMP_8723A, 0 }, 251 { RTL_ROM_LMP_8723B, 1 }, 252 { RTL_ROM_LMP_8821A, 2 }, 253 { RTL_ROM_LMP_8761A, 3 }, 254 { RTL_ROM_LMP_8822B, 8 }, 255 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */ 256 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */ 257 { RTL_ROM_LMP_8822B, 13 }, /* 8822C */ 258 }; 259 260 min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3; 261 if (btrtl_dev->fw_len < min_size) 262 return -EINVAL; 263 264 fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig); 265 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) { 266 rtl_dev_err(hdev, "extension section signature mismatch"); 267 return -EINVAL; 268 } 269 270 /* Loop from the end of the firmware parsing instructions, until 271 * we find an instruction that identifies the "project ID" for the 272 * hardware supported by this firwmare file. 273 * Once we have that, we double-check that that project_id is suitable 274 * for the hardware we are working with. 275 */ 276 while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) { 277 opcode = *--fwptr; 278 length = *--fwptr; 279 data = *--fwptr; 280 281 BT_DBG("check op=%x len=%x data=%x", opcode, length, data); 282 283 if (opcode == 0xff) /* EOF */ 284 break; 285 286 if (length == 0) { 287 rtl_dev_err(hdev, "found instruction with length 0"); 288 return -EINVAL; 289 } 290 291 if (opcode == 0 && length == 1) { 292 project_id = data; 293 break; 294 } 295 296 fwptr -= length; 297 } 298 299 if (project_id < 0) { 300 rtl_dev_err(hdev, "failed to find version instruction"); 301 return -EINVAL; 302 } 303 304 /* Find project_id in table */ 305 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) { 306 if (project_id == project_id_to_lmp_subver[i].id) 307 break; 308 } 309 310 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) { 311 rtl_dev_err(hdev, "unknown project id %d", project_id); 312 return -EINVAL; 313 } 314 315 if (btrtl_dev->ic_info->lmp_subver != 316 project_id_to_lmp_subver[i].lmp_subver) { 317 rtl_dev_err(hdev, "firmware is for %x but this is a %x", 318 project_id_to_lmp_subver[i].lmp_subver, 319 btrtl_dev->ic_info->lmp_subver); 320 return -EINVAL; 321 } 322 323 epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data; 324 if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) { 325 rtl_dev_err(hdev, "bad EPATCH signature"); 326 return -EINVAL; 327 } 328 329 num_patches = le16_to_cpu(epatch_info->num_patches); 330 BT_DBG("fw_version=%x, num_patches=%d", 331 le32_to_cpu(epatch_info->fw_version), num_patches); 332 333 /* After the rtl_epatch_header there is a funky patch metadata section. 334 * Assuming 2 patches, the layout is: 335 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2 336 * 337 * Find the right patch for this chip. 338 */ 339 min_size += 8 * num_patches; 340 if (btrtl_dev->fw_len < min_size) 341 return -EINVAL; 342 343 chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header); 344 patch_length_base = chip_id_base + (sizeof(u16) * num_patches); 345 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches); 346 for (i = 0; i < num_patches; i++) { 347 u16 chip_id = get_unaligned_le16(chip_id_base + 348 (i * sizeof(u16))); 349 if (chip_id == btrtl_dev->rom_version + 1) { 350 patch_length = get_unaligned_le16(patch_length_base + 351 (i * sizeof(u16))); 352 patch_offset = get_unaligned_le32(patch_offset_base + 353 (i * sizeof(u32))); 354 break; 355 } 356 } 357 358 if (!patch_offset) { 359 rtl_dev_err(hdev, "didn't find patch for chip id %d", 360 btrtl_dev->rom_version); 361 return -EINVAL; 362 } 363 364 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i); 365 min_size = patch_offset + patch_length; 366 if (btrtl_dev->fw_len < min_size) 367 return -EINVAL; 368 369 /* Copy the firmware into a new buffer and write the version at 370 * the end. 371 */ 372 len = patch_length; 373 buf = kvmalloc(patch_length, GFP_KERNEL); 374 if (!buf) 375 return -ENOMEM; 376 377 memcpy(buf, btrtl_dev->fw_data + patch_offset, patch_length - 4); 378 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4); 379 380 *_buf = buf; 381 return len; 382 } 383 384 static int rtl_download_firmware(struct hci_dev *hdev, 385 const unsigned char *data, int fw_len) 386 { 387 struct rtl_download_cmd *dl_cmd; 388 int frag_num = fw_len / RTL_FRAG_LEN + 1; 389 int frag_len = RTL_FRAG_LEN; 390 int ret = 0; 391 int i; 392 struct sk_buff *skb; 393 struct hci_rp_read_local_version *rp; 394 395 dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL); 396 if (!dl_cmd) 397 return -ENOMEM; 398 399 for (i = 0; i < frag_num; i++) { 400 struct sk_buff *skb; 401 402 BT_DBG("download fw (%d/%d)", i, frag_num); 403 404 if (i > 0x7f) 405 dl_cmd->index = (i & 0x7f) + 1; 406 else 407 dl_cmd->index = i; 408 409 if (i == (frag_num - 1)) { 410 dl_cmd->index |= 0x80; /* data end */ 411 frag_len = fw_len % RTL_FRAG_LEN; 412 } 413 memcpy(dl_cmd->data, data, frag_len); 414 415 /* Send download command */ 416 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd, 417 HCI_INIT_TIMEOUT); 418 if (IS_ERR(skb)) { 419 rtl_dev_err(hdev, "download fw command failed (%ld)", 420 PTR_ERR(skb)); 421 ret = PTR_ERR(skb); 422 goto out; 423 } 424 425 if (skb->len != sizeof(struct rtl_download_response)) { 426 rtl_dev_err(hdev, "download fw event length mismatch"); 427 kfree_skb(skb); 428 ret = -EIO; 429 goto out; 430 } 431 432 kfree_skb(skb); 433 data += RTL_FRAG_LEN; 434 } 435 436 skb = btrtl_read_local_version(hdev); 437 if (IS_ERR(skb)) { 438 ret = PTR_ERR(skb); 439 rtl_dev_err(hdev, "read local version failed"); 440 goto out; 441 } 442 443 rp = (struct hci_rp_read_local_version *)skb->data; 444 rtl_dev_info(hdev, "fw version 0x%04x%04x", 445 __le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver)); 446 kfree_skb(skb); 447 448 out: 449 kfree(dl_cmd); 450 return ret; 451 } 452 453 static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff) 454 { 455 const struct firmware *fw; 456 int ret; 457 458 rtl_dev_info(hdev, "loading %s", name); 459 ret = request_firmware(&fw, name, &hdev->dev); 460 if (ret < 0) 461 return ret; 462 ret = fw->size; 463 *buff = kvmalloc(fw->size, GFP_KERNEL); 464 if (*buff) 465 memcpy(*buff, fw->data, ret); 466 else 467 ret = -ENOMEM; 468 469 release_firmware(fw); 470 471 return ret; 472 } 473 474 static int btrtl_setup_rtl8723a(struct hci_dev *hdev, 475 struct btrtl_device_info *btrtl_dev) 476 { 477 if (btrtl_dev->fw_len < 8) 478 return -EINVAL; 479 480 /* Check that the firmware doesn't have the epatch signature 481 * (which is only for RTL8723B and newer). 482 */ 483 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) { 484 rtl_dev_err(hdev, "unexpected EPATCH signature!"); 485 return -EINVAL; 486 } 487 488 return rtl_download_firmware(hdev, btrtl_dev->fw_data, 489 btrtl_dev->fw_len); 490 } 491 492 static int btrtl_setup_rtl8723b(struct hci_dev *hdev, 493 struct btrtl_device_info *btrtl_dev) 494 { 495 unsigned char *fw_data = NULL; 496 int ret; 497 u8 *tbuff; 498 499 ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data); 500 if (ret < 0) 501 goto out; 502 503 if (btrtl_dev->cfg_len > 0) { 504 tbuff = kvzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL); 505 if (!tbuff) { 506 ret = -ENOMEM; 507 goto out; 508 } 509 510 memcpy(tbuff, fw_data, ret); 511 kvfree(fw_data); 512 513 memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len); 514 ret += btrtl_dev->cfg_len; 515 516 fw_data = tbuff; 517 } 518 519 rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret); 520 521 ret = rtl_download_firmware(hdev, fw_data, ret); 522 523 out: 524 kvfree(fw_data); 525 return ret; 526 } 527 528 void btrtl_free(struct btrtl_device_info *btrtl_dev) 529 { 530 kvfree(btrtl_dev->fw_data); 531 kvfree(btrtl_dev->cfg_data); 532 kfree(btrtl_dev); 533 } 534 EXPORT_SYMBOL_GPL(btrtl_free); 535 536 struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, 537 const char *postfix) 538 { 539 struct btrtl_device_info *btrtl_dev; 540 struct sk_buff *skb; 541 struct hci_rp_read_local_version *resp; 542 char cfg_name[40]; 543 u16 hci_rev, lmp_subver; 544 u8 hci_ver; 545 int ret; 546 547 btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL); 548 if (!btrtl_dev) { 549 ret = -ENOMEM; 550 goto err_alloc; 551 } 552 553 skb = btrtl_read_local_version(hdev); 554 if (IS_ERR(skb)) { 555 ret = PTR_ERR(skb); 556 goto err_free; 557 } 558 559 resp = (struct hci_rp_read_local_version *)skb->data; 560 rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x", 561 resp->hci_ver, resp->hci_rev, 562 resp->lmp_ver, resp->lmp_subver); 563 564 hci_ver = resp->hci_ver; 565 hci_rev = le16_to_cpu(resp->hci_rev); 566 lmp_subver = le16_to_cpu(resp->lmp_subver); 567 kfree_skb(skb); 568 569 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver, 570 hdev->bus); 571 572 if (!btrtl_dev->ic_info) { 573 rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x", 574 lmp_subver, hci_rev, hci_ver); 575 return btrtl_dev; 576 } 577 578 if (btrtl_dev->ic_info->has_rom_version) { 579 ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version); 580 if (ret) 581 goto err_free; 582 } 583 584 btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name, 585 &btrtl_dev->fw_data); 586 if (btrtl_dev->fw_len < 0) { 587 rtl_dev_err(hdev, "firmware file %s not found", 588 btrtl_dev->ic_info->fw_name); 589 ret = btrtl_dev->fw_len; 590 goto err_free; 591 } 592 593 if (btrtl_dev->ic_info->cfg_name) { 594 if (postfix) { 595 snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin", 596 btrtl_dev->ic_info->cfg_name, postfix); 597 } else { 598 snprintf(cfg_name, sizeof(cfg_name), "%s.bin", 599 btrtl_dev->ic_info->cfg_name); 600 } 601 btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name, 602 &btrtl_dev->cfg_data); 603 if (btrtl_dev->ic_info->config_needed && 604 btrtl_dev->cfg_len <= 0) { 605 rtl_dev_err(hdev, "mandatory config file %s not found", 606 btrtl_dev->ic_info->cfg_name); 607 ret = btrtl_dev->cfg_len; 608 goto err_free; 609 } 610 } 611 612 return btrtl_dev; 613 614 err_free: 615 btrtl_free(btrtl_dev); 616 err_alloc: 617 return ERR_PTR(ret); 618 } 619 EXPORT_SYMBOL_GPL(btrtl_initialize); 620 621 int btrtl_download_firmware(struct hci_dev *hdev, 622 struct btrtl_device_info *btrtl_dev) 623 { 624 /* Match a set of subver values that correspond to stock firmware, 625 * which is not compatible with standard btusb. 626 * If matched, upload an alternative firmware that does conform to 627 * standard btusb. Once that firmware is uploaded, the subver changes 628 * to a different value. 629 */ 630 if (!btrtl_dev->ic_info) { 631 rtl_dev_info(hdev, "assuming no firmware upload needed"); 632 return 0; 633 } 634 635 switch (btrtl_dev->ic_info->lmp_subver) { 636 case RTL_ROM_LMP_8723A: 637 case RTL_ROM_LMP_3499: 638 return btrtl_setup_rtl8723a(hdev, btrtl_dev); 639 case RTL_ROM_LMP_8723B: 640 case RTL_ROM_LMP_8821A: 641 case RTL_ROM_LMP_8761A: 642 case RTL_ROM_LMP_8822B: 643 return btrtl_setup_rtl8723b(hdev, btrtl_dev); 644 default: 645 rtl_dev_info(hdev, "assuming no firmware upload needed"); 646 return 0; 647 } 648 } 649 EXPORT_SYMBOL_GPL(btrtl_download_firmware); 650 651 int btrtl_setup_realtek(struct hci_dev *hdev) 652 { 653 struct btrtl_device_info *btrtl_dev; 654 int ret; 655 656 btrtl_dev = btrtl_initialize(hdev, NULL); 657 if (IS_ERR(btrtl_dev)) 658 return PTR_ERR(btrtl_dev); 659 660 ret = btrtl_download_firmware(hdev, btrtl_dev); 661 662 btrtl_free(btrtl_dev); 663 664 /* Enable controller to do both LE scan and BR/EDR inquiry 665 * simultaneously. 666 */ 667 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); 668 669 return ret; 670 } 671 EXPORT_SYMBOL_GPL(btrtl_setup_realtek); 672 673 int btrtl_shutdown_realtek(struct hci_dev *hdev) 674 { 675 struct sk_buff *skb; 676 int ret; 677 678 /* According to the vendor driver, BT must be reset on close to avoid 679 * firmware crash. 680 */ 681 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); 682 if (IS_ERR(skb)) { 683 ret = PTR_ERR(skb); 684 bt_dev_err(hdev, "HCI reset during shutdown failed"); 685 return ret; 686 } 687 kfree_skb(skb); 688 689 return 0; 690 } 691 EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek); 692 693 static unsigned int btrtl_convert_baudrate(u32 device_baudrate) 694 { 695 switch (device_baudrate) { 696 case 0x0252a00a: 697 return 230400; 698 699 case 0x05f75004: 700 return 921600; 701 702 case 0x00005004: 703 return 1000000; 704 705 case 0x04928002: 706 case 0x01128002: 707 return 1500000; 708 709 case 0x00005002: 710 return 2000000; 711 712 case 0x0000b001: 713 return 2500000; 714 715 case 0x04928001: 716 return 3000000; 717 718 case 0x052a6001: 719 return 3500000; 720 721 case 0x00005001: 722 return 4000000; 723 724 case 0x0252c014: 725 default: 726 return 115200; 727 } 728 } 729 730 int btrtl_get_uart_settings(struct hci_dev *hdev, 731 struct btrtl_device_info *btrtl_dev, 732 unsigned int *controller_baudrate, 733 u32 *device_baudrate, bool *flow_control) 734 { 735 struct rtl_vendor_config *config; 736 struct rtl_vendor_config_entry *entry; 737 int i, total_data_len; 738 bool found = false; 739 740 total_data_len = btrtl_dev->cfg_len - sizeof(*config); 741 if (total_data_len <= 0) { 742 rtl_dev_warn(hdev, "no config loaded"); 743 return -EINVAL; 744 } 745 746 config = (struct rtl_vendor_config *)btrtl_dev->cfg_data; 747 if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) { 748 rtl_dev_err(hdev, "invalid config magic"); 749 return -EINVAL; 750 } 751 752 if (total_data_len < le16_to_cpu(config->total_len)) { 753 rtl_dev_err(hdev, "config is too short"); 754 return -EINVAL; 755 } 756 757 for (i = 0; i < total_data_len; ) { 758 entry = ((void *)config->entry) + i; 759 760 switch (le16_to_cpu(entry->offset)) { 761 case 0xc: 762 if (entry->len < sizeof(*device_baudrate)) { 763 rtl_dev_err(hdev, "invalid UART config entry"); 764 return -EINVAL; 765 } 766 767 *device_baudrate = get_unaligned_le32(entry->data); 768 *controller_baudrate = btrtl_convert_baudrate( 769 *device_baudrate); 770 771 if (entry->len >= 13) 772 *flow_control = !!(entry->data[12] & BIT(2)); 773 else 774 *flow_control = false; 775 776 found = true; 777 break; 778 779 default: 780 rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)", 781 le16_to_cpu(entry->offset), entry->len); 782 break; 783 } 784 785 i += sizeof(*entry) + entry->len; 786 } 787 788 if (!found) { 789 rtl_dev_err(hdev, "no UART config entry found"); 790 return -ENOENT; 791 } 792 793 rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate); 794 rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate); 795 rtl_dev_dbg(hdev, "flow control %d", *flow_control); 796 797 return 0; 798 } 799 EXPORT_SYMBOL_GPL(btrtl_get_uart_settings); 800 801 MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>"); 802 MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION); 803 MODULE_VERSION(VERSION); 804 MODULE_LICENSE("GPL"); 805 MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin"); 806 MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin"); 807 MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin"); 808 MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin"); 809 MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin"); 810 MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin"); 811 MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin"); 812 MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin"); 813 MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin"); 814 MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin"); 815 MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin"); 816 MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin"); 817 MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin"); 818