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