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 /* 8822C with USB interface */ 142 { IC_INFO(RTL_ROM_LMP_8822B, 0xc), 143 .config_needed = false, 144 .has_rom_version = true, 145 .fw_name = "rtl_bt/rtl8822cu_fw.bin", 146 .cfg_name = "rtl_bt/rtl8822cu_config" }, 147 148 /* 8822B */ 149 { IC_INFO(RTL_ROM_LMP_8822B, 0xb), 150 .config_needed = true, 151 .has_rom_version = true, 152 .fw_name = "rtl_bt/rtl8822b_fw.bin", 153 .cfg_name = "rtl_bt/rtl8822b_config" }, 154 }; 155 156 static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev, 157 u8 hci_ver, u8 hci_bus) 158 { 159 int i; 160 161 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) { 162 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) && 163 (ic_id_table[i].lmp_subver != lmp_subver)) 164 continue; 165 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) && 166 (ic_id_table[i].hci_rev != hci_rev)) 167 continue; 168 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) && 169 (ic_id_table[i].hci_ver != hci_ver)) 170 continue; 171 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) && 172 (ic_id_table[i].hci_bus != hci_bus)) 173 continue; 174 175 break; 176 } 177 if (i >= ARRAY_SIZE(ic_id_table)) 178 return NULL; 179 180 return &ic_id_table[i]; 181 } 182 183 static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version) 184 { 185 struct rtl_rom_version_evt *rom_version; 186 struct sk_buff *skb; 187 188 /* Read RTL ROM version command */ 189 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT); 190 if (IS_ERR(skb)) { 191 rtl_dev_err(hdev, "Read ROM version failed (%ld)\n", 192 PTR_ERR(skb)); 193 return PTR_ERR(skb); 194 } 195 196 if (skb->len != sizeof(*rom_version)) { 197 rtl_dev_err(hdev, "RTL version event length mismatch\n"); 198 kfree_skb(skb); 199 return -EIO; 200 } 201 202 rom_version = (struct rtl_rom_version_evt *)skb->data; 203 rtl_dev_info(hdev, "rom_version status=%x version=%x\n", 204 rom_version->status, rom_version->version); 205 206 *version = rom_version->version; 207 208 kfree_skb(skb); 209 return 0; 210 } 211 212 static int rtlbt_parse_firmware(struct hci_dev *hdev, 213 struct btrtl_device_info *btrtl_dev, 214 unsigned char **_buf) 215 { 216 static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 }; 217 struct rtl_epatch_header *epatch_info; 218 unsigned char *buf; 219 int i, len; 220 size_t min_size; 221 u8 opcode, length, data; 222 int project_id = -1; 223 const unsigned char *fwptr, *chip_id_base; 224 const unsigned char *patch_length_base, *patch_offset_base; 225 u32 patch_offset = 0; 226 u16 patch_length, num_patches; 227 static const struct { 228 __u16 lmp_subver; 229 __u8 id; 230 } project_id_to_lmp_subver[] = { 231 { RTL_ROM_LMP_8723A, 0 }, 232 { RTL_ROM_LMP_8723B, 1 }, 233 { RTL_ROM_LMP_8821A, 2 }, 234 { RTL_ROM_LMP_8761A, 3 }, 235 { RTL_ROM_LMP_8822B, 8 }, 236 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */ 237 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */ 238 { RTL_ROM_LMP_8822B, 13 }, /* 8822C */ 239 }; 240 241 min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3; 242 if (btrtl_dev->fw_len < min_size) 243 return -EINVAL; 244 245 fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig); 246 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) { 247 rtl_dev_err(hdev, "extension section signature mismatch\n"); 248 return -EINVAL; 249 } 250 251 /* Loop from the end of the firmware parsing instructions, until 252 * we find an instruction that identifies the "project ID" for the 253 * hardware supported by this firwmare file. 254 * Once we have that, we double-check that that project_id is suitable 255 * for the hardware we are working with. 256 */ 257 while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) { 258 opcode = *--fwptr; 259 length = *--fwptr; 260 data = *--fwptr; 261 262 BT_DBG("check op=%x len=%x data=%x", opcode, length, data); 263 264 if (opcode == 0xff) /* EOF */ 265 break; 266 267 if (length == 0) { 268 rtl_dev_err(hdev, "found instruction with length 0\n"); 269 return -EINVAL; 270 } 271 272 if (opcode == 0 && length == 1) { 273 project_id = data; 274 break; 275 } 276 277 fwptr -= length; 278 } 279 280 if (project_id < 0) { 281 rtl_dev_err(hdev, "failed to find version instruction\n"); 282 return -EINVAL; 283 } 284 285 /* Find project_id in table */ 286 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) { 287 if (project_id == project_id_to_lmp_subver[i].id) 288 break; 289 } 290 291 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) { 292 rtl_dev_err(hdev, "unknown project id %d\n", project_id); 293 return -EINVAL; 294 } 295 296 if (btrtl_dev->ic_info->lmp_subver != 297 project_id_to_lmp_subver[i].lmp_subver) { 298 rtl_dev_err(hdev, "firmware is for %x but this is a %x\n", 299 project_id_to_lmp_subver[i].lmp_subver, 300 btrtl_dev->ic_info->lmp_subver); 301 return -EINVAL; 302 } 303 304 epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data; 305 if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) { 306 rtl_dev_err(hdev, "bad EPATCH signature\n"); 307 return -EINVAL; 308 } 309 310 num_patches = le16_to_cpu(epatch_info->num_patches); 311 BT_DBG("fw_version=%x, num_patches=%d", 312 le32_to_cpu(epatch_info->fw_version), num_patches); 313 314 /* After the rtl_epatch_header there is a funky patch metadata section. 315 * Assuming 2 patches, the layout is: 316 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2 317 * 318 * Find the right patch for this chip. 319 */ 320 min_size += 8 * num_patches; 321 if (btrtl_dev->fw_len < min_size) 322 return -EINVAL; 323 324 chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header); 325 patch_length_base = chip_id_base + (sizeof(u16) * num_patches); 326 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches); 327 for (i = 0; i < num_patches; i++) { 328 u16 chip_id = get_unaligned_le16(chip_id_base + 329 (i * sizeof(u16))); 330 if (chip_id == btrtl_dev->rom_version + 1) { 331 patch_length = get_unaligned_le16(patch_length_base + 332 (i * sizeof(u16))); 333 patch_offset = get_unaligned_le32(patch_offset_base + 334 (i * sizeof(u32))); 335 break; 336 } 337 } 338 339 if (!patch_offset) { 340 rtl_dev_err(hdev, "didn't find patch for chip id %d", 341 btrtl_dev->rom_version); 342 return -EINVAL; 343 } 344 345 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i); 346 min_size = patch_offset + patch_length; 347 if (btrtl_dev->fw_len < min_size) 348 return -EINVAL; 349 350 /* Copy the firmware into a new buffer and write the version at 351 * the end. 352 */ 353 len = patch_length; 354 buf = kmemdup(btrtl_dev->fw_data + patch_offset, patch_length, 355 GFP_KERNEL); 356 if (!buf) 357 return -ENOMEM; 358 359 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4); 360 361 *_buf = buf; 362 return len; 363 } 364 365 static int rtl_download_firmware(struct hci_dev *hdev, 366 const unsigned char *data, int fw_len) 367 { 368 struct rtl_download_cmd *dl_cmd; 369 int frag_num = fw_len / RTL_FRAG_LEN + 1; 370 int frag_len = RTL_FRAG_LEN; 371 int ret = 0; 372 int i; 373 374 dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL); 375 if (!dl_cmd) 376 return -ENOMEM; 377 378 for (i = 0; i < frag_num; i++) { 379 struct sk_buff *skb; 380 381 BT_DBG("download fw (%d/%d)", i, frag_num); 382 383 dl_cmd->index = i; 384 if (i == (frag_num - 1)) { 385 dl_cmd->index |= 0x80; /* data end */ 386 frag_len = fw_len % RTL_FRAG_LEN; 387 } 388 memcpy(dl_cmd->data, data, frag_len); 389 390 /* Send download command */ 391 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd, 392 HCI_INIT_TIMEOUT); 393 if (IS_ERR(skb)) { 394 rtl_dev_err(hdev, "download fw command failed (%ld)\n", 395 PTR_ERR(skb)); 396 ret = -PTR_ERR(skb); 397 goto out; 398 } 399 400 if (skb->len != sizeof(struct rtl_download_response)) { 401 rtl_dev_err(hdev, "download fw event length mismatch\n"); 402 kfree_skb(skb); 403 ret = -EIO; 404 goto out; 405 } 406 407 kfree_skb(skb); 408 data += RTL_FRAG_LEN; 409 } 410 411 out: 412 kfree(dl_cmd); 413 return ret; 414 } 415 416 static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff) 417 { 418 const struct firmware *fw; 419 int ret; 420 421 rtl_dev_info(hdev, "rtl: loading %s\n", name); 422 ret = request_firmware(&fw, name, &hdev->dev); 423 if (ret < 0) 424 return ret; 425 ret = fw->size; 426 *buff = kmemdup(fw->data, ret, GFP_KERNEL); 427 if (!*buff) 428 ret = -ENOMEM; 429 430 release_firmware(fw); 431 432 return ret; 433 } 434 435 static int btrtl_setup_rtl8723a(struct hci_dev *hdev, 436 struct btrtl_device_info *btrtl_dev) 437 { 438 if (btrtl_dev->fw_len < 8) 439 return -EINVAL; 440 441 /* Check that the firmware doesn't have the epatch signature 442 * (which is only for RTL8723B and newer). 443 */ 444 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) { 445 rtl_dev_err(hdev, "unexpected EPATCH signature!\n"); 446 return -EINVAL; 447 } 448 449 return rtl_download_firmware(hdev, btrtl_dev->fw_data, 450 btrtl_dev->fw_len); 451 } 452 453 static int btrtl_setup_rtl8723b(struct hci_dev *hdev, 454 struct btrtl_device_info *btrtl_dev) 455 { 456 unsigned char *fw_data = NULL; 457 int ret; 458 u8 *tbuff; 459 460 ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data); 461 if (ret < 0) 462 goto out; 463 464 if (btrtl_dev->cfg_len > 0) { 465 tbuff = kzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL); 466 if (!tbuff) { 467 ret = -ENOMEM; 468 goto out; 469 } 470 471 memcpy(tbuff, fw_data, ret); 472 kfree(fw_data); 473 474 memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len); 475 ret += btrtl_dev->cfg_len; 476 477 fw_data = tbuff; 478 } 479 480 rtl_dev_info(hdev, "cfg_sz %d, total sz %d\n", btrtl_dev->cfg_len, ret); 481 482 ret = rtl_download_firmware(hdev, fw_data, ret); 483 484 out: 485 kfree(fw_data); 486 return ret; 487 } 488 489 static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev) 490 { 491 struct sk_buff *skb; 492 493 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, 494 HCI_INIT_TIMEOUT); 495 if (IS_ERR(skb)) { 496 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)\n", 497 PTR_ERR(skb)); 498 return skb; 499 } 500 501 if (skb->len != sizeof(struct hci_rp_read_local_version)) { 502 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch\n"); 503 kfree_skb(skb); 504 return ERR_PTR(-EIO); 505 } 506 507 return skb; 508 } 509 510 void btrtl_free(struct btrtl_device_info *btrtl_dev) 511 { 512 kfree(btrtl_dev->fw_data); 513 kfree(btrtl_dev->cfg_data); 514 kfree(btrtl_dev); 515 } 516 EXPORT_SYMBOL_GPL(btrtl_free); 517 518 struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, 519 const char *postfix) 520 { 521 struct btrtl_device_info *btrtl_dev; 522 struct sk_buff *skb; 523 struct hci_rp_read_local_version *resp; 524 char cfg_name[40]; 525 u16 hci_rev, lmp_subver; 526 u8 hci_ver; 527 int ret; 528 529 btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL); 530 if (!btrtl_dev) { 531 ret = -ENOMEM; 532 goto err_alloc; 533 } 534 535 skb = btrtl_read_local_version(hdev); 536 if (IS_ERR(skb)) { 537 ret = PTR_ERR(skb); 538 goto err_free; 539 } 540 541 resp = (struct hci_rp_read_local_version *)skb->data; 542 rtl_dev_info(hdev, "rtl: examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x\n", 543 resp->hci_ver, resp->hci_rev, 544 resp->lmp_ver, resp->lmp_subver); 545 546 hci_ver = resp->hci_ver; 547 hci_rev = le16_to_cpu(resp->hci_rev); 548 lmp_subver = le16_to_cpu(resp->lmp_subver); 549 kfree_skb(skb); 550 551 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver, 552 hdev->bus); 553 554 if (!btrtl_dev->ic_info) { 555 rtl_dev_err(hdev, "rtl: unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x", 556 lmp_subver, hci_rev, hci_ver); 557 ret = -EINVAL; 558 goto err_free; 559 } 560 561 if (btrtl_dev->ic_info->has_rom_version) { 562 ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version); 563 if (ret) 564 goto err_free; 565 } 566 567 btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name, 568 &btrtl_dev->fw_data); 569 if (btrtl_dev->fw_len < 0) { 570 rtl_dev_err(hdev, "firmware file %s not found\n", 571 btrtl_dev->ic_info->fw_name); 572 ret = btrtl_dev->fw_len; 573 goto err_free; 574 } 575 576 if (btrtl_dev->ic_info->cfg_name) { 577 if (postfix) { 578 snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin", 579 btrtl_dev->ic_info->cfg_name, postfix); 580 } else { 581 snprintf(cfg_name, sizeof(cfg_name), "%s.bin", 582 btrtl_dev->ic_info->cfg_name); 583 } 584 btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name, 585 &btrtl_dev->cfg_data); 586 if (btrtl_dev->ic_info->config_needed && 587 btrtl_dev->cfg_len <= 0) { 588 rtl_dev_err(hdev, "mandatory config file %s not found\n", 589 btrtl_dev->ic_info->cfg_name); 590 ret = btrtl_dev->cfg_len; 591 goto err_free; 592 } 593 } 594 595 return btrtl_dev; 596 597 err_free: 598 btrtl_free(btrtl_dev); 599 err_alloc: 600 return ERR_PTR(ret); 601 } 602 EXPORT_SYMBOL_GPL(btrtl_initialize); 603 604 int btrtl_download_firmware(struct hci_dev *hdev, 605 struct btrtl_device_info *btrtl_dev) 606 { 607 /* Match a set of subver values that correspond to stock firmware, 608 * which is not compatible with standard btusb. 609 * If matched, upload an alternative firmware that does conform to 610 * standard btusb. Once that firmware is uploaded, the subver changes 611 * to a different value. 612 */ 613 switch (btrtl_dev->ic_info->lmp_subver) { 614 case RTL_ROM_LMP_8723A: 615 case RTL_ROM_LMP_3499: 616 return btrtl_setup_rtl8723a(hdev, btrtl_dev); 617 case RTL_ROM_LMP_8723B: 618 case RTL_ROM_LMP_8821A: 619 case RTL_ROM_LMP_8761A: 620 case RTL_ROM_LMP_8822B: 621 return btrtl_setup_rtl8723b(hdev, btrtl_dev); 622 default: 623 rtl_dev_info(hdev, "rtl: assuming no firmware upload needed\n"); 624 return 0; 625 } 626 } 627 EXPORT_SYMBOL_GPL(btrtl_download_firmware); 628 629 int btrtl_setup_realtek(struct hci_dev *hdev) 630 { 631 struct btrtl_device_info *btrtl_dev; 632 int ret; 633 634 btrtl_dev = btrtl_initialize(hdev, NULL); 635 if (IS_ERR(btrtl_dev)) 636 return PTR_ERR(btrtl_dev); 637 638 ret = btrtl_download_firmware(hdev, btrtl_dev); 639 640 btrtl_free(btrtl_dev); 641 642 return ret; 643 } 644 EXPORT_SYMBOL_GPL(btrtl_setup_realtek); 645 646 static unsigned int btrtl_convert_baudrate(u32 device_baudrate) 647 { 648 switch (device_baudrate) { 649 case 0x0252a00a: 650 return 230400; 651 652 case 0x05f75004: 653 return 921600; 654 655 case 0x00005004: 656 return 1000000; 657 658 case 0x04928002: 659 case 0x01128002: 660 return 1500000; 661 662 case 0x00005002: 663 return 2000000; 664 665 case 0x0000b001: 666 return 2500000; 667 668 case 0x04928001: 669 return 3000000; 670 671 case 0x052a6001: 672 return 3500000; 673 674 case 0x00005001: 675 return 4000000; 676 677 case 0x0252c014: 678 default: 679 return 115200; 680 } 681 } 682 683 int btrtl_get_uart_settings(struct hci_dev *hdev, 684 struct btrtl_device_info *btrtl_dev, 685 unsigned int *controller_baudrate, 686 u32 *device_baudrate, bool *flow_control) 687 { 688 struct rtl_vendor_config *config; 689 struct rtl_vendor_config_entry *entry; 690 int i, total_data_len; 691 bool found = false; 692 693 total_data_len = btrtl_dev->cfg_len - sizeof(*config); 694 if (total_data_len <= 0) { 695 rtl_dev_warn(hdev, "no config loaded\n"); 696 return -EINVAL; 697 } 698 699 config = (struct rtl_vendor_config *)btrtl_dev->cfg_data; 700 if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) { 701 rtl_dev_err(hdev, "invalid config magic\n"); 702 return -EINVAL; 703 } 704 705 if (total_data_len < le16_to_cpu(config->total_len)) { 706 rtl_dev_err(hdev, "config is too short\n"); 707 return -EINVAL; 708 } 709 710 for (i = 0; i < total_data_len; ) { 711 entry = ((void *)config->entry) + i; 712 713 switch (le16_to_cpu(entry->offset)) { 714 case 0xc: 715 if (entry->len < sizeof(*device_baudrate)) { 716 rtl_dev_err(hdev, "invalid UART config entry\n"); 717 return -EINVAL; 718 } 719 720 *device_baudrate = get_unaligned_le32(entry->data); 721 *controller_baudrate = btrtl_convert_baudrate( 722 *device_baudrate); 723 724 if (entry->len >= 13) 725 *flow_control = !!(entry->data[12] & BIT(2)); 726 else 727 *flow_control = false; 728 729 found = true; 730 break; 731 732 default: 733 rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)\n", 734 le16_to_cpu(entry->offset), entry->len); 735 break; 736 }; 737 738 i += sizeof(*entry) + entry->len; 739 } 740 741 if (!found) { 742 rtl_dev_err(hdev, "no UART config entry found\n"); 743 return -ENOENT; 744 } 745 746 rtl_dev_dbg(hdev, "device baudrate = 0x%08x\n", *device_baudrate); 747 rtl_dev_dbg(hdev, "controller baudrate = %u\n", *controller_baudrate); 748 rtl_dev_dbg(hdev, "flow control %d\n", *flow_control); 749 750 return 0; 751 } 752 EXPORT_SYMBOL_GPL(btrtl_get_uart_settings); 753 754 MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>"); 755 MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION); 756 MODULE_VERSION(VERSION); 757 MODULE_LICENSE("GPL"); 758 MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin"); 759 MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin"); 760 MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin"); 761 MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin"); 762 MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin"); 763 MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin"); 764 MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin"); 765 MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin"); 766 MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin"); 767 MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin"); 768 MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin"); 769 MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin"); 770 MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin"); 771