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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_8723A 0x1200
22#define RTL_ROM_LMP_8723B 0x8723
23#define RTL_ROM_LMP_8821A 0x8821
24#define RTL_ROM_LMP_8761A 0x8761
25#define RTL_ROM_LMP_8822B 0x8822
26#define RTL_ROM_LMP_8852A 0x8852
27#define RTL_CONFIG_MAGIC 0x8723ab55
28
29#define IC_MATCH_FL_LMPSUBV (1 << 0)
30#define IC_MATCH_FL_HCIREV (1 << 1)
31#define IC_MATCH_FL_HCIVER (1 << 2)
32#define IC_MATCH_FL_HCIBUS (1 << 3)
33#define IC_INFO(lmps, hcir, hciv, bus) \
34 .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | \
35 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, \
36 .lmp_subver = (lmps), \
37 .hci_rev = (hcir), \
38 .hci_ver = (hciv), \
39 .hci_bus = (bus)
40
41enum btrtl_chip_id {
42 CHIP_ID_8723A,
43 CHIP_ID_8723B,
44 CHIP_ID_8821A,
45 CHIP_ID_8761A,
46 CHIP_ID_8822B = 8,
47 CHIP_ID_8723D,
48 CHIP_ID_8821C,
49 CHIP_ID_8822C = 13,
50 CHIP_ID_8761B,
51 CHIP_ID_8852A = 18,
52 CHIP_ID_8852B = 20,
53 CHIP_ID_8852C = 25,
54};
55
56struct id_table {
57 __u16 match_flags;
58 __u16 lmp_subver;
59 __u16 hci_rev;
60 __u8 hci_ver;
61 __u8 hci_bus;
62 bool config_needed;
63 bool has_rom_version;
64 bool has_msft_ext;
65 char *fw_name;
66 char *cfg_name;
67};
68
69struct btrtl_device_info {
70 const struct id_table *ic_info;
71 u8 rom_version;
72 u8 *fw_data;
73 int fw_len;
74 u8 *cfg_data;
75 int cfg_len;
76 bool drop_fw;
77 int project_id;
78};
79
80static const struct id_table ic_id_table[] = {
81 /* 8723A */
82 { IC_INFO(RTL_ROM_LMP_8723A, 0xb, 0x6, HCI_USB),
83 .config_needed = false,
84 .has_rom_version = false,
85 .fw_name = "rtl_bt/rtl8723a_fw.bin",
86 .cfg_name = NULL },
87
88 /* 8723BS */
89 { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
90 .config_needed = true,
91 .has_rom_version = true,
92 .fw_name = "rtl_bt/rtl8723bs_fw.bin",
93 .cfg_name = "rtl_bt/rtl8723bs_config" },
94
95 /* 8723B */
96 { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
97 .config_needed = false,
98 .has_rom_version = true,
99 .fw_name = "rtl_bt/rtl8723b_fw.bin",
100 .cfg_name = "rtl_bt/rtl8723b_config" },
101
102 /* 8723D */
103 { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
104 .config_needed = true,
105 .has_rom_version = true,
106 .fw_name = "rtl_bt/rtl8723d_fw.bin",
107 .cfg_name = "rtl_bt/rtl8723d_config" },
108
109 /* 8723DS */
110 { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
111 .config_needed = true,
112 .has_rom_version = true,
113 .fw_name = "rtl_bt/rtl8723ds_fw.bin",
114 .cfg_name = "rtl_bt/rtl8723ds_config" },
115
116 /* 8821A */
117 { IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
118 .config_needed = false,
119 .has_rom_version = true,
120 .fw_name = "rtl_bt/rtl8821a_fw.bin",
121 .cfg_name = "rtl_bt/rtl8821a_config" },
122
123 /* 8821C */
124 { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
125 .config_needed = false,
126 .has_rom_version = true,
127 .has_msft_ext = true,
128 .fw_name = "rtl_bt/rtl8821c_fw.bin",
129 .cfg_name = "rtl_bt/rtl8821c_config" },
130
131 /* 8761A */
132 { IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
133 .config_needed = false,
134 .has_rom_version = true,
135 .fw_name = "rtl_bt/rtl8761a_fw.bin",
136 .cfg_name = "rtl_bt/rtl8761a_config" },
137
138 /* 8761B */
139 { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
140 .config_needed = false,
141 .has_rom_version = true,
142 .has_msft_ext = true,
143 .fw_name = "rtl_bt/rtl8761b_fw.bin",
144 .cfg_name = "rtl_bt/rtl8761b_config" },
145
146 /* 8761BU */
147 { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
148 .config_needed = false,
149 .has_rom_version = true,
150 .fw_name = "rtl_bt/rtl8761bu_fw.bin",
151 .cfg_name = "rtl_bt/rtl8761bu_config" },
152
153 /* 8822C with UART interface */
154 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
155 .config_needed = true,
156 .has_rom_version = true,
157 .has_msft_ext = true,
158 .fw_name = "rtl_bt/rtl8822cs_fw.bin",
159 .cfg_name = "rtl_bt/rtl8822cs_config" },
160
161 /* 8822C with UART interface */
162 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_UART),
163 .config_needed = true,
164 .has_rom_version = true,
165 .has_msft_ext = true,
166 .fw_name = "rtl_bt/rtl8822cs_fw.bin",
167 .cfg_name = "rtl_bt/rtl8822cs_config" },
168
169 /* 8822C with USB interface */
170 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_USB),
171 .config_needed = false,
172 .has_rom_version = true,
173 .has_msft_ext = true,
174 .fw_name = "rtl_bt/rtl8822cu_fw.bin",
175 .cfg_name = "rtl_bt/rtl8822cu_config" },
176
177 /* 8822B */
178 { IC_INFO(RTL_ROM_LMP_8822B, 0xb, 0x7, HCI_USB),
179 .config_needed = true,
180 .has_rom_version = true,
181 .has_msft_ext = true,
182 .fw_name = "rtl_bt/rtl8822b_fw.bin",
183 .cfg_name = "rtl_bt/rtl8822b_config" },
184
185 /* 8852A */
186 { IC_INFO(RTL_ROM_LMP_8852A, 0xa, 0xb, HCI_USB),
187 .config_needed = false,
188 .has_rom_version = true,
189 .has_msft_ext = true,
190 .fw_name = "rtl_bt/rtl8852au_fw.bin",
191 .cfg_name = "rtl_bt/rtl8852au_config" },
192
193 /* 8852B */
194 { IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_USB),
195 .config_needed = false,
196 .has_rom_version = true,
197 .has_msft_ext = true,
198 .fw_name = "rtl_bt/rtl8852bu_fw.bin",
199 .cfg_name = "rtl_bt/rtl8852bu_config" },
200
201 /* 8852C */
202 { IC_INFO(RTL_ROM_LMP_8852A, 0xc, 0xc, HCI_USB),
203 .config_needed = false,
204 .has_rom_version = true,
205 .has_msft_ext = true,
206 .fw_name = "rtl_bt/rtl8852cu_fw.bin",
207 .cfg_name = "rtl_bt/rtl8852cu_config" },
208 };
209
210static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
211 u8 hci_ver, u8 hci_bus)
212{
213 int i;
214
215 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
216 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
217 (ic_id_table[i].lmp_subver != lmp_subver))
218 continue;
219 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
220 (ic_id_table[i].hci_rev != hci_rev))
221 continue;
222 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
223 (ic_id_table[i].hci_ver != hci_ver))
224 continue;
225 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
226 (ic_id_table[i].hci_bus != hci_bus))
227 continue;
228
229 break;
230 }
231 if (i >= ARRAY_SIZE(ic_id_table))
232 return NULL;
233
234 return &ic_id_table[i];
235}
236
237static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
238{
239 struct sk_buff *skb;
240
241 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
242 HCI_INIT_TIMEOUT);
243 if (IS_ERR(skb)) {
244 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)",
245 PTR_ERR(skb));
246 return skb;
247 }
248
249 if (skb->len != sizeof(struct hci_rp_read_local_version)) {
250 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch");
251 kfree_skb(skb);
252 return ERR_PTR(-EIO);
253 }
254
255 return skb;
256}
257
258static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
259{
260 struct rtl_rom_version_evt *rom_version;
261 struct sk_buff *skb;
262
263 /* Read RTL ROM version command */
264 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
265 if (IS_ERR(skb)) {
266 rtl_dev_err(hdev, "Read ROM version failed (%ld)",
267 PTR_ERR(skb));
268 return PTR_ERR(skb);
269 }
270
271 if (skb->len != sizeof(*rom_version)) {
272 rtl_dev_err(hdev, "version event length mismatch");
273 kfree_skb(skb);
274 return -EIO;
275 }
276
277 rom_version = (struct rtl_rom_version_evt *)skb->data;
278 rtl_dev_info(hdev, "rom_version status=%x version=%x",
279 rom_version->status, rom_version->version);
280
281 *version = rom_version->version;
282
283 kfree_skb(skb);
284 return 0;
285}
286
287static int rtlbt_parse_firmware(struct hci_dev *hdev,
288 struct btrtl_device_info *btrtl_dev,
289 unsigned char **_buf)
290{
291 static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
292 struct rtl_epatch_header *epatch_info;
293 unsigned char *buf;
294 int i, len;
295 size_t min_size;
296 u8 opcode, length, data;
297 int project_id = -1;
298 const unsigned char *fwptr, *chip_id_base;
299 const unsigned char *patch_length_base, *patch_offset_base;
300 u32 patch_offset = 0;
301 u16 patch_length, num_patches;
302 static const struct {
303 __u16 lmp_subver;
304 __u8 id;
305 } project_id_to_lmp_subver[] = {
306 { RTL_ROM_LMP_8723A, 0 },
307 { RTL_ROM_LMP_8723B, 1 },
308 { RTL_ROM_LMP_8821A, 2 },
309 { RTL_ROM_LMP_8761A, 3 },
310 { RTL_ROM_LMP_8822B, 8 },
311 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */
312 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */
313 { RTL_ROM_LMP_8822B, 13 }, /* 8822C */
314 { RTL_ROM_LMP_8761A, 14 }, /* 8761B */
315 { RTL_ROM_LMP_8852A, 18 }, /* 8852A */
316 { RTL_ROM_LMP_8852A, 20 }, /* 8852B */
317 { RTL_ROM_LMP_8852A, 25 }, /* 8852C */
318 };
319
320 min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
321 if (btrtl_dev->fw_len < min_size)
322 return -EINVAL;
323
324 fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
325 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
326 rtl_dev_err(hdev, "extension section signature mismatch");
327 return -EINVAL;
328 }
329
330 /* Loop from the end of the firmware parsing instructions, until
331 * we find an instruction that identifies the "project ID" for the
332 * hardware supported by this firwmare file.
333 * Once we have that, we double-check that project_id is suitable
334 * for the hardware we are working with.
335 */
336 while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
337 opcode = *--fwptr;
338 length = *--fwptr;
339 data = *--fwptr;
340
341 BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
342
343 if (opcode == 0xff) /* EOF */
344 break;
345
346 if (length == 0) {
347 rtl_dev_err(hdev, "found instruction with length 0");
348 return -EINVAL;
349 }
350
351 if (opcode == 0 && length == 1) {
352 project_id = data;
353 break;
354 }
355
356 fwptr -= length;
357 }
358
359 if (project_id < 0) {
360 rtl_dev_err(hdev, "failed to find version instruction");
361 return -EINVAL;
362 }
363
364 /* Find project_id in table */
365 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
366 if (project_id == project_id_to_lmp_subver[i].id) {
367 btrtl_dev->project_id = project_id;
368 break;
369 }
370 }
371
372 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
373 rtl_dev_err(hdev, "unknown project id %d", project_id);
374 return -EINVAL;
375 }
376
377 if (btrtl_dev->ic_info->lmp_subver !=
378 project_id_to_lmp_subver[i].lmp_subver) {
379 rtl_dev_err(hdev, "firmware is for %x but this is a %x",
380 project_id_to_lmp_subver[i].lmp_subver,
381 btrtl_dev->ic_info->lmp_subver);
382 return -EINVAL;
383 }
384
385 epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
386 if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
387 rtl_dev_err(hdev, "bad EPATCH signature");
388 return -EINVAL;
389 }
390
391 num_patches = le16_to_cpu(epatch_info->num_patches);
392 BT_DBG("fw_version=%x, num_patches=%d",
393 le32_to_cpu(epatch_info->fw_version), num_patches);
394
395 /* After the rtl_epatch_header there is a funky patch metadata section.
396 * Assuming 2 patches, the layout is:
397 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
398 *
399 * Find the right patch for this chip.
400 */
401 min_size += 8 * num_patches;
402 if (btrtl_dev->fw_len < min_size)
403 return -EINVAL;
404
405 chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header);
406 patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
407 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
408 for (i = 0; i < num_patches; i++) {
409 u16 chip_id = get_unaligned_le16(chip_id_base +
410 (i * sizeof(u16)));
411 if (chip_id == btrtl_dev->rom_version + 1) {
412 patch_length = get_unaligned_le16(patch_length_base +
413 (i * sizeof(u16)));
414 patch_offset = get_unaligned_le32(patch_offset_base +
415 (i * sizeof(u32)));
416 break;
417 }
418 }
419
420 if (!patch_offset) {
421 rtl_dev_err(hdev, "didn't find patch for chip id %d",
422 btrtl_dev->rom_version);
423 return -EINVAL;
424 }
425
426 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
427 min_size = patch_offset + patch_length;
428 if (btrtl_dev->fw_len < min_size)
429 return -EINVAL;
430
431 /* Copy the firmware into a new buffer and write the version at
432 * the end.
433 */
434 len = patch_length;
435 buf = kvmalloc(patch_length, GFP_KERNEL);
436 if (!buf)
437 return -ENOMEM;
438
439 memcpy(buf, btrtl_dev->fw_data + patch_offset, patch_length - 4);
440 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
441
442 *_buf = buf;
443 return len;
444}
445
446static int rtl_download_firmware(struct hci_dev *hdev,
447 const unsigned char *data, int fw_len)
448{
449 struct rtl_download_cmd *dl_cmd;
450 int frag_num = fw_len / RTL_FRAG_LEN + 1;
451 int frag_len = RTL_FRAG_LEN;
452 int ret = 0;
453 int i;
454 struct sk_buff *skb;
455 struct hci_rp_read_local_version *rp;
456
457 dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
458 if (!dl_cmd)
459 return -ENOMEM;
460
461 for (i = 0; i < frag_num; i++) {
462 struct sk_buff *skb;
463
464 BT_DBG("download fw (%d/%d)", i, frag_num);
465
466 if (i > 0x7f)
467 dl_cmd->index = (i & 0x7f) + 1;
468 else
469 dl_cmd->index = i;
470
471 if (i == (frag_num - 1)) {
472 dl_cmd->index |= 0x80; /* data end */
473 frag_len = fw_len % RTL_FRAG_LEN;
474 }
475 memcpy(dl_cmd->data, data, frag_len);
476
477 /* Send download command */
478 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
479 HCI_INIT_TIMEOUT);
480 if (IS_ERR(skb)) {
481 rtl_dev_err(hdev, "download fw command failed (%ld)",
482 PTR_ERR(skb));
483 ret = PTR_ERR(skb);
484 goto out;
485 }
486
487 if (skb->len != sizeof(struct rtl_download_response)) {
488 rtl_dev_err(hdev, "download fw event length mismatch");
489 kfree_skb(skb);
490 ret = -EIO;
491 goto out;
492 }
493
494 kfree_skb(skb);
495 data += RTL_FRAG_LEN;
496 }
497
498 skb = btrtl_read_local_version(hdev);
499 if (IS_ERR(skb)) {
500 ret = PTR_ERR(skb);
501 rtl_dev_err(hdev, "read local version failed");
502 goto out;
503 }
504
505 rp = (struct hci_rp_read_local_version *)skb->data;
506 rtl_dev_info(hdev, "fw version 0x%04x%04x",
507 __le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver));
508 kfree_skb(skb);
509
510out:
511 kfree(dl_cmd);
512 return ret;
513}
514
515static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
516{
517 const struct firmware *fw;
518 int ret;
519
520 rtl_dev_info(hdev, "loading %s", name);
521 ret = request_firmware(&fw, name, &hdev->dev);
522 if (ret < 0)
523 return ret;
524 ret = fw->size;
525 *buff = kvmalloc(fw->size, GFP_KERNEL);
526 if (*buff)
527 memcpy(*buff, fw->data, ret);
528 else
529 ret = -ENOMEM;
530
531 release_firmware(fw);
532
533 return ret;
534}
535
536static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
537 struct btrtl_device_info *btrtl_dev)
538{
539 if (btrtl_dev->fw_len < 8)
540 return -EINVAL;
541
542 /* Check that the firmware doesn't have the epatch signature
543 * (which is only for RTL8723B and newer).
544 */
545 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
546 rtl_dev_err(hdev, "unexpected EPATCH signature!");
547 return -EINVAL;
548 }
549
550 return rtl_download_firmware(hdev, btrtl_dev->fw_data,
551 btrtl_dev->fw_len);
552}
553
554static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
555 struct btrtl_device_info *btrtl_dev)
556{
557 unsigned char *fw_data = NULL;
558 int ret;
559 u8 *tbuff;
560
561 ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
562 if (ret < 0)
563 goto out;
564
565 if (btrtl_dev->cfg_len > 0) {
566 tbuff = kvzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
567 if (!tbuff) {
568 ret = -ENOMEM;
569 goto out;
570 }
571
572 memcpy(tbuff, fw_data, ret);
573 kvfree(fw_data);
574
575 memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
576 ret += btrtl_dev->cfg_len;
577
578 fw_data = tbuff;
579 }
580
581 rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret);
582
583 ret = rtl_download_firmware(hdev, fw_data, ret);
584
585out:
586 kvfree(fw_data);
587 return ret;
588}
589
590void btrtl_free(struct btrtl_device_info *btrtl_dev)
591{
592 kvfree(btrtl_dev->fw_data);
593 kvfree(btrtl_dev->cfg_data);
594 kfree(btrtl_dev);
595}
596EXPORT_SYMBOL_GPL(btrtl_free);
597
598struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
599 const char *postfix)
600{
601 struct btrtl_device_info *btrtl_dev;
602 struct sk_buff *skb;
603 struct hci_rp_read_local_version *resp;
604 char cfg_name[40];
605 u16 hci_rev, lmp_subver;
606 u8 hci_ver;
607 int ret;
608 u16 opcode;
609 u8 cmd[2];
610
611 btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
612 if (!btrtl_dev) {
613 ret = -ENOMEM;
614 goto err_alloc;
615 }
616
617 skb = btrtl_read_local_version(hdev);
618 if (IS_ERR(skb)) {
619 ret = PTR_ERR(skb);
620 goto err_free;
621 }
622
623 resp = (struct hci_rp_read_local_version *)skb->data;
624 rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
625 resp->hci_ver, resp->hci_rev,
626 resp->lmp_ver, resp->lmp_subver);
627
628 hci_ver = resp->hci_ver;
629 hci_rev = le16_to_cpu(resp->hci_rev);
630 lmp_subver = le16_to_cpu(resp->lmp_subver);
631
632 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
633 hdev->bus);
634
635 if (!btrtl_dev->ic_info)
636 btrtl_dev->drop_fw = true;
637
638 if (btrtl_dev->drop_fw) {
639 opcode = hci_opcode_pack(0x3f, 0x66);
640 cmd[0] = opcode & 0xff;
641 cmd[1] = opcode >> 8;
642
643 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
644 if (!skb)
645 goto out_free;
646
647 skb_put_data(skb, cmd, sizeof(cmd));
648 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
649
650 hdev->send(hdev, skb);
651
652 /* Ensure the above vendor command is sent to controller and
653 * process has done.
654 */
655 msleep(200);
656
657 /* Read the local version again. Expect to have the vanilla
658 * version as cold boot.
659 */
660 skb = btrtl_read_local_version(hdev);
661 if (IS_ERR(skb)) {
662 ret = PTR_ERR(skb);
663 goto err_free;
664 }
665
666 resp = (struct hci_rp_read_local_version *)skb->data;
667 rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
668 resp->hci_ver, resp->hci_rev,
669 resp->lmp_ver, resp->lmp_subver);
670
671 hci_ver = resp->hci_ver;
672 hci_rev = le16_to_cpu(resp->hci_rev);
673 lmp_subver = le16_to_cpu(resp->lmp_subver);
674
675 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
676 hdev->bus);
677 }
678out_free:
679 kfree_skb(skb);
680
681 if (!btrtl_dev->ic_info) {
682 rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
683 lmp_subver, hci_rev, hci_ver);
684 return btrtl_dev;
685 }
686
687 if (btrtl_dev->ic_info->has_rom_version) {
688 ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version);
689 if (ret)
690 goto err_free;
691 }
692
693 btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name,
694 &btrtl_dev->fw_data);
695 if (btrtl_dev->fw_len < 0) {
696 rtl_dev_err(hdev, "firmware file %s not found",
697 btrtl_dev->ic_info->fw_name);
698 ret = btrtl_dev->fw_len;
699 goto err_free;
700 }
701
702 if (btrtl_dev->ic_info->cfg_name) {
703 if (postfix) {
704 snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin",
705 btrtl_dev->ic_info->cfg_name, postfix);
706 } else {
707 snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
708 btrtl_dev->ic_info->cfg_name);
709 }
710 btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
711 &btrtl_dev->cfg_data);
712 if (btrtl_dev->ic_info->config_needed &&
713 btrtl_dev->cfg_len <= 0) {
714 rtl_dev_err(hdev, "mandatory config file %s not found",
715 btrtl_dev->ic_info->cfg_name);
716 ret = btrtl_dev->cfg_len;
717 goto err_free;
718 }
719 }
720
721 /* The following chips supports the Microsoft vendor extension,
722 * therefore set the corresponding VsMsftOpCode.
723 */
724 if (btrtl_dev->ic_info->has_msft_ext)
725 hci_set_msft_opcode(hdev, 0xFCF0);
726
727 return btrtl_dev;
728
729err_free:
730 btrtl_free(btrtl_dev);
731err_alloc:
732 return ERR_PTR(ret);
733}
734EXPORT_SYMBOL_GPL(btrtl_initialize);
735
736int btrtl_download_firmware(struct hci_dev *hdev,
737 struct btrtl_device_info *btrtl_dev)
738{
739 /* Match a set of subver values that correspond to stock firmware,
740 * which is not compatible with standard btusb.
741 * If matched, upload an alternative firmware that does conform to
742 * standard btusb. Once that firmware is uploaded, the subver changes
743 * to a different value.
744 */
745 if (!btrtl_dev->ic_info) {
746 rtl_dev_info(hdev, "assuming no firmware upload needed");
747 return 0;
748 }
749
750 switch (btrtl_dev->ic_info->lmp_subver) {
751 case RTL_ROM_LMP_8723A:
752 return btrtl_setup_rtl8723a(hdev, btrtl_dev);
753 case RTL_ROM_LMP_8723B:
754 case RTL_ROM_LMP_8821A:
755 case RTL_ROM_LMP_8761A:
756 case RTL_ROM_LMP_8822B:
757 case RTL_ROM_LMP_8852A:
758 return btrtl_setup_rtl8723b(hdev, btrtl_dev);
759 default:
760 rtl_dev_info(hdev, "assuming no firmware upload needed");
761 return 0;
762 }
763}
764EXPORT_SYMBOL_GPL(btrtl_download_firmware);
765
766void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
767{
768 /* Enable controller to do both LE scan and BR/EDR inquiry
769 * simultaneously.
770 */
771 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
772
773 /* Enable central-peripheral role (able to create new connections with
774 * an existing connection in slave role).
775 */
776 /* Enable WBS supported for the specific Realtek devices. */
777 switch (btrtl_dev->project_id) {
778 case CHIP_ID_8822C:
779 case CHIP_ID_8852A:
780 case CHIP_ID_8852B:
781 case CHIP_ID_8852C:
782 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
783 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
784
785 /* RTL8852C needs to transmit mSBC data continuously without
786 * the zero length of USB packets for the ALT 6 supported chips
787 */
788 if (btrtl_dev->project_id == CHIP_ID_8852C)
789 btrealtek_set_flag(hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP);
790
791 hci_set_aosp_capable(hdev);
792 break;
793 default:
794 rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
795 rtl_dev_dbg(hdev, "WBS supported not enabled.");
796 break;
797 }
798}
799EXPORT_SYMBOL_GPL(btrtl_set_quirks);
800
801int btrtl_setup_realtek(struct hci_dev *hdev)
802{
803 struct btrtl_device_info *btrtl_dev;
804 int ret;
805
806 btrtl_dev = btrtl_initialize(hdev, NULL);
807 if (IS_ERR(btrtl_dev))
808 return PTR_ERR(btrtl_dev);
809
810 ret = btrtl_download_firmware(hdev, btrtl_dev);
811
812 btrtl_set_quirks(hdev, btrtl_dev);
813
814 btrtl_free(btrtl_dev);
815 return ret;
816}
817EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
818
819int btrtl_shutdown_realtek(struct hci_dev *hdev)
820{
821 struct sk_buff *skb;
822 int ret;
823
824 /* According to the vendor driver, BT must be reset on close to avoid
825 * firmware crash.
826 */
827 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
828 if (IS_ERR(skb)) {
829 ret = PTR_ERR(skb);
830 bt_dev_err(hdev, "HCI reset during shutdown failed");
831 return ret;
832 }
833 kfree_skb(skb);
834
835 return 0;
836}
837EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek);
838
839static unsigned int btrtl_convert_baudrate(u32 device_baudrate)
840{
841 switch (device_baudrate) {
842 case 0x0252a00a:
843 return 230400;
844
845 case 0x05f75004:
846 return 921600;
847
848 case 0x00005004:
849 return 1000000;
850
851 case 0x04928002:
852 case 0x01128002:
853 return 1500000;
854
855 case 0x00005002:
856 return 2000000;
857
858 case 0x0000b001:
859 return 2500000;
860
861 case 0x04928001:
862 return 3000000;
863
864 case 0x052a6001:
865 return 3500000;
866
867 case 0x00005001:
868 return 4000000;
869
870 case 0x0252c014:
871 default:
872 return 115200;
873 }
874}
875
876int btrtl_get_uart_settings(struct hci_dev *hdev,
877 struct btrtl_device_info *btrtl_dev,
878 unsigned int *controller_baudrate,
879 u32 *device_baudrate, bool *flow_control)
880{
881 struct rtl_vendor_config *config;
882 struct rtl_vendor_config_entry *entry;
883 int i, total_data_len;
884 bool found = false;
885
886 total_data_len = btrtl_dev->cfg_len - sizeof(*config);
887 if (total_data_len <= 0) {
888 rtl_dev_warn(hdev, "no config loaded");
889 return -EINVAL;
890 }
891
892 config = (struct rtl_vendor_config *)btrtl_dev->cfg_data;
893 if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) {
894 rtl_dev_err(hdev, "invalid config magic");
895 return -EINVAL;
896 }
897
898 if (total_data_len < le16_to_cpu(config->total_len)) {
899 rtl_dev_err(hdev, "config is too short");
900 return -EINVAL;
901 }
902
903 for (i = 0; i < total_data_len; ) {
904 entry = ((void *)config->entry) + i;
905
906 switch (le16_to_cpu(entry->offset)) {
907 case 0xc:
908 if (entry->len < sizeof(*device_baudrate)) {
909 rtl_dev_err(hdev, "invalid UART config entry");
910 return -EINVAL;
911 }
912
913 *device_baudrate = get_unaligned_le32(entry->data);
914 *controller_baudrate = btrtl_convert_baudrate(
915 *device_baudrate);
916
917 if (entry->len >= 13)
918 *flow_control = !!(entry->data[12] & BIT(2));
919 else
920 *flow_control = false;
921
922 found = true;
923 break;
924
925 default:
926 rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)",
927 le16_to_cpu(entry->offset), entry->len);
928 break;
929 }
930
931 i += sizeof(*entry) + entry->len;
932 }
933
934 if (!found) {
935 rtl_dev_err(hdev, "no UART config entry found");
936 return -ENOENT;
937 }
938
939 rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate);
940 rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate);
941 rtl_dev_dbg(hdev, "flow control %d", *flow_control);
942
943 return 0;
944}
945EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
946
947MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
948MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
949MODULE_VERSION(VERSION);
950MODULE_LICENSE("GPL");
951MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
952MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
953MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
954MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
955MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
956MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
957MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
958MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
959MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
960MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
961MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
962MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
963MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");
964MODULE_FIRMWARE("rtl_bt/rtl8852au_fw.bin");
965MODULE_FIRMWARE("rtl_bt/rtl8852au_config.bin");
966MODULE_FIRMWARE("rtl_bt/rtl8852bu_fw.bin");
967MODULE_FIRMWARE("rtl_bt/rtl8852bu_config.bin");
968MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw.bin");
969MODULE_FIRMWARE("rtl_bt/rtl8852cu_config.bin");
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_CHIP_8723CS_CG 3
21#define RTL_CHIP_8723CS_VF 4
22#define RTL_CHIP_8723CS_XX 5
23#define RTL_EPATCH_SIGNATURE "Realtech"
24#define RTL_EPATCH_SIGNATURE_V2 "RTBTCore"
25#define RTL_ROM_LMP_8703B 0x8703
26#define RTL_ROM_LMP_8723A 0x1200
27#define RTL_ROM_LMP_8723B 0x8723
28#define RTL_ROM_LMP_8821A 0x8821
29#define RTL_ROM_LMP_8761A 0x8761
30#define RTL_ROM_LMP_8822B 0x8822
31#define RTL_ROM_LMP_8852A 0x8852
32#define RTL_ROM_LMP_8851B 0x8851
33#define RTL_CONFIG_MAGIC 0x8723ab55
34
35#define RTL_VSC_OP_COREDUMP 0xfcff
36
37#define IC_MATCH_FL_LMPSUBV (1 << 0)
38#define IC_MATCH_FL_HCIREV (1 << 1)
39#define IC_MATCH_FL_HCIVER (1 << 2)
40#define IC_MATCH_FL_HCIBUS (1 << 3)
41#define IC_MATCH_FL_CHIP_TYPE (1 << 4)
42#define IC_INFO(lmps, hcir, hciv, bus) \
43 .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | \
44 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, \
45 .lmp_subver = (lmps), \
46 .hci_rev = (hcir), \
47 .hci_ver = (hciv), \
48 .hci_bus = (bus)
49
50#define RTL_CHIP_SUBVER (&(struct rtl_vendor_cmd) {{0x10, 0x38, 0x04, 0x28, 0x80}})
51#define RTL_CHIP_REV (&(struct rtl_vendor_cmd) {{0x10, 0x3A, 0x04, 0x28, 0x80}})
52#define RTL_SEC_PROJ (&(struct rtl_vendor_cmd) {{0x10, 0xA4, 0x0D, 0x00, 0xb0}})
53
54#define RTL_PATCH_SNIPPETS 0x01
55#define RTL_PATCH_DUMMY_HEADER 0x02
56#define RTL_PATCH_SECURITY_HEADER 0x03
57
58enum btrtl_chip_id {
59 CHIP_ID_8723A,
60 CHIP_ID_8723B,
61 CHIP_ID_8821A,
62 CHIP_ID_8761A,
63 CHIP_ID_8822B = 8,
64 CHIP_ID_8723D,
65 CHIP_ID_8821C,
66 CHIP_ID_8822C = 13,
67 CHIP_ID_8761B,
68 CHIP_ID_8852A = 18,
69 CHIP_ID_8852B = 20,
70 CHIP_ID_8852C = 25,
71 CHIP_ID_8851B = 36,
72 CHIP_ID_8852BT = 47,
73};
74
75struct id_table {
76 __u16 match_flags;
77 __u16 lmp_subver;
78 __u16 hci_rev;
79 __u8 hci_ver;
80 __u8 hci_bus;
81 __u8 chip_type;
82 bool config_needed;
83 bool has_rom_version;
84 bool has_msft_ext;
85 char *fw_name;
86 char *cfg_name;
87 char *hw_info;
88};
89
90struct btrtl_device_info {
91 const struct id_table *ic_info;
92 u8 rom_version;
93 u8 *fw_data;
94 int fw_len;
95 u8 *cfg_data;
96 int cfg_len;
97 bool drop_fw;
98 int project_id;
99 u8 key_id;
100 struct list_head patch_subsecs;
101};
102
103static const struct id_table ic_id_table[] = {
104 /* 8723A */
105 { IC_INFO(RTL_ROM_LMP_8723A, 0xb, 0x6, HCI_USB),
106 .config_needed = false,
107 .has_rom_version = false,
108 .fw_name = "rtl_bt/rtl8723a_fw",
109 .cfg_name = NULL,
110 .hw_info = "rtl8723au" },
111
112 /* 8723BS */
113 { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
114 .config_needed = true,
115 .has_rom_version = true,
116 .fw_name = "rtl_bt/rtl8723bs_fw",
117 .cfg_name = "rtl_bt/rtl8723bs_config",
118 .hw_info = "rtl8723bs" },
119
120 /* 8723B */
121 { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
122 .config_needed = false,
123 .has_rom_version = true,
124 .fw_name = "rtl_bt/rtl8723b_fw",
125 .cfg_name = "rtl_bt/rtl8723b_config",
126 .hw_info = "rtl8723bu" },
127
128 /* 8723CS-CG */
129 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
130 IC_MATCH_FL_HCIBUS,
131 .lmp_subver = RTL_ROM_LMP_8703B,
132 .chip_type = RTL_CHIP_8723CS_CG,
133 .hci_bus = HCI_UART,
134 .config_needed = true,
135 .has_rom_version = true,
136 .fw_name = "rtl_bt/rtl8723cs_cg_fw",
137 .cfg_name = "rtl_bt/rtl8723cs_cg_config",
138 .hw_info = "rtl8723cs-cg" },
139
140 /* 8723CS-VF */
141 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
142 IC_MATCH_FL_HCIBUS,
143 .lmp_subver = RTL_ROM_LMP_8703B,
144 .chip_type = RTL_CHIP_8723CS_VF,
145 .hci_bus = HCI_UART,
146 .config_needed = true,
147 .has_rom_version = true,
148 .fw_name = "rtl_bt/rtl8723cs_vf_fw",
149 .cfg_name = "rtl_bt/rtl8723cs_vf_config",
150 .hw_info = "rtl8723cs-vf" },
151
152 /* 8723CS-XX */
153 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
154 IC_MATCH_FL_HCIBUS,
155 .lmp_subver = RTL_ROM_LMP_8703B,
156 .chip_type = RTL_CHIP_8723CS_XX,
157 .hci_bus = HCI_UART,
158 .config_needed = true,
159 .has_rom_version = true,
160 .fw_name = "rtl_bt/rtl8723cs_xx_fw",
161 .cfg_name = "rtl_bt/rtl8723cs_xx_config",
162 .hw_info = "rtl8723cs" },
163
164 /* 8723D */
165 { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
166 .config_needed = true,
167 .has_rom_version = true,
168 .fw_name = "rtl_bt/rtl8723d_fw",
169 .cfg_name = "rtl_bt/rtl8723d_config",
170 .hw_info = "rtl8723du" },
171
172 /* 8723DS */
173 { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
174 .config_needed = true,
175 .has_rom_version = true,
176 .fw_name = "rtl_bt/rtl8723ds_fw",
177 .cfg_name = "rtl_bt/rtl8723ds_config",
178 .hw_info = "rtl8723ds" },
179
180 /* 8821A */
181 { IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
182 .config_needed = false,
183 .has_rom_version = true,
184 .fw_name = "rtl_bt/rtl8821a_fw",
185 .cfg_name = "rtl_bt/rtl8821a_config",
186 .hw_info = "rtl8821au" },
187
188 /* 8821C */
189 { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
190 .config_needed = false,
191 .has_rom_version = true,
192 .has_msft_ext = true,
193 .fw_name = "rtl_bt/rtl8821c_fw",
194 .cfg_name = "rtl_bt/rtl8821c_config",
195 .hw_info = "rtl8821cu" },
196
197 /* 8821CS */
198 { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_UART),
199 .config_needed = true,
200 .has_rom_version = true,
201 .has_msft_ext = true,
202 .fw_name = "rtl_bt/rtl8821cs_fw",
203 .cfg_name = "rtl_bt/rtl8821cs_config",
204 .hw_info = "rtl8821cs" },
205
206 /* 8761A */
207 { IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
208 .config_needed = false,
209 .has_rom_version = true,
210 .fw_name = "rtl_bt/rtl8761a_fw",
211 .cfg_name = "rtl_bt/rtl8761a_config",
212 .hw_info = "rtl8761au" },
213
214 /* 8761B */
215 { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
216 .config_needed = false,
217 .has_rom_version = true,
218 .has_msft_ext = true,
219 .fw_name = "rtl_bt/rtl8761b_fw",
220 .cfg_name = "rtl_bt/rtl8761b_config",
221 .hw_info = "rtl8761btv" },
222
223 /* 8761BU */
224 { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
225 .config_needed = false,
226 .has_rom_version = true,
227 .fw_name = "rtl_bt/rtl8761bu_fw",
228 .cfg_name = "rtl_bt/rtl8761bu_config",
229 .hw_info = "rtl8761bu" },
230
231 /* 8822C with UART interface */
232 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
233 .config_needed = true,
234 .has_rom_version = true,
235 .has_msft_ext = true,
236 .fw_name = "rtl_bt/rtl8822cs_fw",
237 .cfg_name = "rtl_bt/rtl8822cs_config",
238 .hw_info = "rtl8822cs" },
239
240 /* 8822C with UART interface */
241 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_UART),
242 .config_needed = true,
243 .has_rom_version = true,
244 .has_msft_ext = true,
245 .fw_name = "rtl_bt/rtl8822cs_fw",
246 .cfg_name = "rtl_bt/rtl8822cs_config",
247 .hw_info = "rtl8822cs" },
248
249 /* 8822C with USB interface */
250 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_USB),
251 .config_needed = false,
252 .has_rom_version = true,
253 .has_msft_ext = true,
254 .fw_name = "rtl_bt/rtl8822cu_fw",
255 .cfg_name = "rtl_bt/rtl8822cu_config",
256 .hw_info = "rtl8822cu" },
257
258 /* 8822B */
259 { IC_INFO(RTL_ROM_LMP_8822B, 0xb, 0x7, HCI_USB),
260 .config_needed = true,
261 .has_rom_version = true,
262 .has_msft_ext = true,
263 .fw_name = "rtl_bt/rtl8822b_fw",
264 .cfg_name = "rtl_bt/rtl8822b_config",
265 .hw_info = "rtl8822bu" },
266
267 /* 8852A */
268 { IC_INFO(RTL_ROM_LMP_8852A, 0xa, 0xb, HCI_USB),
269 .config_needed = false,
270 .has_rom_version = true,
271 .has_msft_ext = true,
272 .fw_name = "rtl_bt/rtl8852au_fw",
273 .cfg_name = "rtl_bt/rtl8852au_config",
274 .hw_info = "rtl8852au" },
275
276 /* 8852B with UART interface */
277 { IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_UART),
278 .config_needed = true,
279 .has_rom_version = true,
280 .has_msft_ext = true,
281 .fw_name = "rtl_bt/rtl8852bs_fw",
282 .cfg_name = "rtl_bt/rtl8852bs_config",
283 .hw_info = "rtl8852bs" },
284
285 /* 8852B */
286 { IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_USB),
287 .config_needed = false,
288 .has_rom_version = true,
289 .has_msft_ext = true,
290 .fw_name = "rtl_bt/rtl8852bu_fw",
291 .cfg_name = "rtl_bt/rtl8852bu_config",
292 .hw_info = "rtl8852bu" },
293
294 /* 8852C */
295 { IC_INFO(RTL_ROM_LMP_8852A, 0xc, 0xc, HCI_USB),
296 .config_needed = false,
297 .has_rom_version = true,
298 .has_msft_ext = true,
299 .fw_name = "rtl_bt/rtl8852cu_fw",
300 .cfg_name = "rtl_bt/rtl8852cu_config",
301 .hw_info = "rtl8852cu" },
302
303 /* 8851B */
304 { IC_INFO(RTL_ROM_LMP_8851B, 0xb, 0xc, HCI_USB),
305 .config_needed = false,
306 .has_rom_version = true,
307 .has_msft_ext = false,
308 .fw_name = "rtl_bt/rtl8851bu_fw",
309 .cfg_name = "rtl_bt/rtl8851bu_config",
310 .hw_info = "rtl8851bu" },
311
312 /* 8852BT/8852BE-VT */
313 { IC_INFO(RTL_ROM_LMP_8852A, 0x87, 0xc, HCI_USB),
314 .config_needed = false,
315 .has_rom_version = true,
316 .has_msft_ext = true,
317 .fw_name = "rtl_bt/rtl8852btu_fw",
318 .cfg_name = "rtl_bt/rtl8852btu_config",
319 .hw_info = "rtl8852btu" },
320 };
321
322static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
323 u8 hci_ver, u8 hci_bus,
324 u8 chip_type)
325{
326 int i;
327
328 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
329 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
330 (ic_id_table[i].lmp_subver != lmp_subver))
331 continue;
332 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
333 (ic_id_table[i].hci_rev != hci_rev))
334 continue;
335 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
336 (ic_id_table[i].hci_ver != hci_ver))
337 continue;
338 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
339 (ic_id_table[i].hci_bus != hci_bus))
340 continue;
341 if ((ic_id_table[i].match_flags & IC_MATCH_FL_CHIP_TYPE) &&
342 (ic_id_table[i].chip_type != chip_type))
343 continue;
344
345 break;
346 }
347 if (i >= ARRAY_SIZE(ic_id_table))
348 return NULL;
349
350 return &ic_id_table[i];
351}
352
353static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
354{
355 struct sk_buff *skb;
356
357 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
358 HCI_INIT_TIMEOUT);
359 if (IS_ERR(skb)) {
360 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)",
361 PTR_ERR(skb));
362 return skb;
363 }
364
365 if (skb->len != sizeof(struct hci_rp_read_local_version)) {
366 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch");
367 kfree_skb(skb);
368 return ERR_PTR(-EIO);
369 }
370
371 return skb;
372}
373
374static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
375{
376 struct rtl_rom_version_evt *rom_version;
377 struct sk_buff *skb;
378
379 /* Read RTL ROM version command */
380 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
381 if (IS_ERR(skb)) {
382 rtl_dev_err(hdev, "Read ROM version failed (%ld)",
383 PTR_ERR(skb));
384 return PTR_ERR(skb);
385 }
386
387 if (skb->len != sizeof(*rom_version)) {
388 rtl_dev_err(hdev, "version event length mismatch");
389 kfree_skb(skb);
390 return -EIO;
391 }
392
393 rom_version = (struct rtl_rom_version_evt *)skb->data;
394 rtl_dev_info(hdev, "rom_version status=%x version=%x",
395 rom_version->status, rom_version->version);
396
397 *version = rom_version->version;
398
399 kfree_skb(skb);
400 return 0;
401}
402
403static int btrtl_vendor_read_reg16(struct hci_dev *hdev,
404 struct rtl_vendor_cmd *cmd, u8 *rp)
405{
406 struct sk_buff *skb;
407 int err = 0;
408
409 skb = __hci_cmd_sync(hdev, 0xfc61, sizeof(*cmd), cmd,
410 HCI_INIT_TIMEOUT);
411 if (IS_ERR(skb)) {
412 err = PTR_ERR(skb);
413 rtl_dev_err(hdev, "RTL: Read reg16 failed (%d)", err);
414 return err;
415 }
416
417 if (skb->len != 3 || skb->data[0]) {
418 bt_dev_err(hdev, "RTL: Read reg16 length mismatch");
419 kfree_skb(skb);
420 return -EIO;
421 }
422
423 if (rp)
424 memcpy(rp, skb->data + 1, 2);
425
426 kfree_skb(skb);
427
428 return 0;
429}
430
431static void *rtl_iov_pull_data(struct rtl_iovec *iov, u32 len)
432{
433 void *data = iov->data;
434
435 if (iov->len < len)
436 return NULL;
437
438 iov->data += len;
439 iov->len -= len;
440
441 return data;
442}
443
444static void btrtl_insert_ordered_subsec(struct rtl_subsection *node,
445 struct btrtl_device_info *btrtl_dev)
446{
447 struct list_head *pos;
448 struct list_head *next;
449 struct rtl_subsection *subsec;
450
451 list_for_each_safe(pos, next, &btrtl_dev->patch_subsecs) {
452 subsec = list_entry(pos, struct rtl_subsection, list);
453 if (subsec->prio >= node->prio)
454 break;
455 }
456 __list_add(&node->list, pos->prev, pos);
457}
458
459static int btrtl_parse_section(struct hci_dev *hdev,
460 struct btrtl_device_info *btrtl_dev, u32 opcode,
461 u8 *data, u32 len)
462{
463 struct rtl_section_hdr *hdr;
464 struct rtl_subsection *subsec;
465 struct rtl_common_subsec *common_subsec;
466 struct rtl_sec_hdr *sec_hdr;
467 int i;
468 u8 *ptr;
469 u16 num_subsecs;
470 u32 subsec_len;
471 int rc = 0;
472 struct rtl_iovec iov = {
473 .data = data,
474 .len = len,
475 };
476
477 hdr = rtl_iov_pull_data(&iov, sizeof(*hdr));
478 if (!hdr)
479 return -EINVAL;
480 num_subsecs = le16_to_cpu(hdr->num);
481
482 for (i = 0; i < num_subsecs; i++) {
483 common_subsec = rtl_iov_pull_data(&iov, sizeof(*common_subsec));
484 if (!common_subsec)
485 break;
486 subsec_len = le32_to_cpu(common_subsec->len);
487
488 rtl_dev_dbg(hdev, "subsec, eco 0x%02x, len %08x",
489 common_subsec->eco, subsec_len);
490
491 ptr = rtl_iov_pull_data(&iov, subsec_len);
492 if (!ptr)
493 break;
494
495 if (common_subsec->eco != btrtl_dev->rom_version + 1)
496 continue;
497
498 switch (opcode) {
499 case RTL_PATCH_SECURITY_HEADER:
500 sec_hdr = (void *)common_subsec;
501 if (sec_hdr->key_id != btrtl_dev->key_id)
502 continue;
503 break;
504 }
505
506 subsec = kzalloc(sizeof(*subsec), GFP_KERNEL);
507 if (!subsec)
508 return -ENOMEM;
509 subsec->opcode = opcode;
510 subsec->prio = common_subsec->prio;
511 subsec->len = subsec_len;
512 subsec->data = ptr;
513 btrtl_insert_ordered_subsec(subsec, btrtl_dev);
514 rc += subsec_len;
515 }
516
517 return rc;
518}
519
520static int rtlbt_parse_firmware_v2(struct hci_dev *hdev,
521 struct btrtl_device_info *btrtl_dev,
522 unsigned char **_buf)
523{
524 struct rtl_epatch_header_v2 *hdr;
525 int rc;
526 u8 reg_val[2];
527 u8 key_id;
528 u32 num_sections;
529 struct rtl_section *section;
530 struct rtl_subsection *entry, *tmp;
531 u32 section_len;
532 u32 opcode;
533 int len = 0;
534 int i;
535 u8 *ptr;
536 struct rtl_iovec iov = {
537 .data = btrtl_dev->fw_data,
538 .len = btrtl_dev->fw_len - 7, /* Cut the tail */
539 };
540
541 rc = btrtl_vendor_read_reg16(hdev, RTL_SEC_PROJ, reg_val);
542 if (rc < 0)
543 return -EIO;
544 key_id = reg_val[0];
545
546 rtl_dev_dbg(hdev, "%s: key id %u", __func__, key_id);
547
548 btrtl_dev->key_id = key_id;
549
550 hdr = rtl_iov_pull_data(&iov, sizeof(*hdr));
551 if (!hdr)
552 return -EINVAL;
553 num_sections = le32_to_cpu(hdr->num_sections);
554
555 rtl_dev_dbg(hdev, "FW version %08x-%08x", *((u32 *)hdr->fw_version),
556 *((u32 *)(hdr->fw_version + 4)));
557
558 for (i = 0; i < num_sections; i++) {
559 section = rtl_iov_pull_data(&iov, sizeof(*section));
560 if (!section)
561 break;
562 section_len = le32_to_cpu(section->len);
563 opcode = le32_to_cpu(section->opcode);
564
565 rtl_dev_dbg(hdev, "opcode 0x%04x", section->opcode);
566
567 ptr = rtl_iov_pull_data(&iov, section_len);
568 if (!ptr)
569 break;
570
571 switch (opcode) {
572 case RTL_PATCH_SNIPPETS:
573 rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
574 ptr, section_len);
575 break;
576 case RTL_PATCH_SECURITY_HEADER:
577 /* If key_id from chip is zero, ignore all security
578 * headers.
579 */
580 if (!key_id)
581 break;
582 rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
583 ptr, section_len);
584 break;
585 case RTL_PATCH_DUMMY_HEADER:
586 rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
587 ptr, section_len);
588 break;
589 default:
590 rc = 0;
591 break;
592 }
593 if (rc < 0) {
594 rtl_dev_err(hdev, "RTL: Parse section (%u) err %d",
595 opcode, rc);
596 return rc;
597 }
598 len += rc;
599 }
600
601 if (!len)
602 return -ENODATA;
603
604 /* Allocate mem and copy all found subsecs. */
605 ptr = kvmalloc(len, GFP_KERNEL);
606 if (!ptr)
607 return -ENOMEM;
608
609 len = 0;
610 list_for_each_entry_safe(entry, tmp, &btrtl_dev->patch_subsecs, list) {
611 rtl_dev_dbg(hdev, "RTL: opcode %08x, addr %p, len 0x%x",
612 entry->opcode, entry->data, entry->len);
613 memcpy(ptr + len, entry->data, entry->len);
614 len += entry->len;
615 }
616
617 if (!len)
618 return -EPERM;
619
620 *_buf = ptr;
621 return len;
622}
623
624static int rtlbt_parse_firmware(struct hci_dev *hdev,
625 struct btrtl_device_info *btrtl_dev,
626 unsigned char **_buf)
627{
628 static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
629 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
630 struct rtl_epatch_header *epatch_info;
631 unsigned char *buf;
632 int i, len;
633 size_t min_size;
634 u8 opcode, length, data;
635 int project_id = -1;
636 const unsigned char *fwptr, *chip_id_base;
637 const unsigned char *patch_length_base, *patch_offset_base;
638 u32 patch_offset = 0;
639 u16 patch_length, num_patches;
640 static const struct {
641 __u16 lmp_subver;
642 __u8 id;
643 } project_id_to_lmp_subver[] = {
644 { RTL_ROM_LMP_8723A, 0 },
645 { RTL_ROM_LMP_8723B, 1 },
646 { RTL_ROM_LMP_8821A, 2 },
647 { RTL_ROM_LMP_8761A, 3 },
648 { RTL_ROM_LMP_8703B, 7 },
649 { RTL_ROM_LMP_8822B, 8 },
650 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */
651 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */
652 { RTL_ROM_LMP_8822B, 13 }, /* 8822C */
653 { RTL_ROM_LMP_8761A, 14 }, /* 8761B */
654 { RTL_ROM_LMP_8852A, 18 }, /* 8852A */
655 { RTL_ROM_LMP_8852A, 20 }, /* 8852B */
656 { RTL_ROM_LMP_8852A, 25 }, /* 8852C */
657 { RTL_ROM_LMP_8851B, 36 }, /* 8851B */
658 { RTL_ROM_LMP_8852A, 47 }, /* 8852BT */
659 };
660
661 if (btrtl_dev->fw_len <= 8)
662 return -EINVAL;
663
664 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8))
665 min_size = sizeof(struct rtl_epatch_header) +
666 sizeof(extension_sig) + 3;
667 else if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE_V2, 8))
668 min_size = sizeof(struct rtl_epatch_header_v2) +
669 sizeof(extension_sig) + 3;
670 else
671 return -EINVAL;
672
673 if (btrtl_dev->fw_len < min_size)
674 return -EINVAL;
675
676 fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
677 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
678 rtl_dev_err(hdev, "extension section signature mismatch");
679 return -EINVAL;
680 }
681
682 /* Loop from the end of the firmware parsing instructions, until
683 * we find an instruction that identifies the "project ID" for the
684 * hardware supported by this firwmare file.
685 * Once we have that, we double-check that project_id is suitable
686 * for the hardware we are working with.
687 */
688 while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
689 opcode = *--fwptr;
690 length = *--fwptr;
691 data = *--fwptr;
692
693 BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
694
695 if (opcode == 0xff) /* EOF */
696 break;
697
698 if (length == 0) {
699 rtl_dev_err(hdev, "found instruction with length 0");
700 return -EINVAL;
701 }
702
703 if (opcode == 0 && length == 1) {
704 project_id = data;
705 break;
706 }
707
708 fwptr -= length;
709 }
710
711 if (project_id < 0) {
712 rtl_dev_err(hdev, "failed to find version instruction");
713 return -EINVAL;
714 }
715
716 /* Find project_id in table */
717 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
718 if (project_id == project_id_to_lmp_subver[i].id) {
719 btrtl_dev->project_id = project_id;
720 break;
721 }
722 }
723
724 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
725 rtl_dev_err(hdev, "unknown project id %d", project_id);
726 return -EINVAL;
727 }
728
729 if (btrtl_dev->ic_info->lmp_subver !=
730 project_id_to_lmp_subver[i].lmp_subver) {
731 rtl_dev_err(hdev, "firmware is for %x but this is a %x",
732 project_id_to_lmp_subver[i].lmp_subver,
733 btrtl_dev->ic_info->lmp_subver);
734 return -EINVAL;
735 }
736
737 if (memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8) != 0) {
738 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE_V2, 8))
739 return rtlbt_parse_firmware_v2(hdev, btrtl_dev, _buf);
740 rtl_dev_err(hdev, "bad EPATCH signature");
741 return -EINVAL;
742 }
743
744 epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
745 num_patches = le16_to_cpu(epatch_info->num_patches);
746
747 BT_DBG("fw_version=%x, num_patches=%d",
748 le32_to_cpu(epatch_info->fw_version), num_patches);
749 coredump_info->rtl_dump.fw_version = le32_to_cpu(epatch_info->fw_version);
750
751 /* After the rtl_epatch_header there is a funky patch metadata section.
752 * Assuming 2 patches, the layout is:
753 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
754 *
755 * Find the right patch for this chip.
756 */
757 min_size += 8 * num_patches;
758 if (btrtl_dev->fw_len < min_size)
759 return -EINVAL;
760
761 chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header);
762 patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
763 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
764 for (i = 0; i < num_patches; i++) {
765 u16 chip_id = get_unaligned_le16(chip_id_base +
766 (i * sizeof(u16)));
767 if (chip_id == btrtl_dev->rom_version + 1) {
768 patch_length = get_unaligned_le16(patch_length_base +
769 (i * sizeof(u16)));
770 patch_offset = get_unaligned_le32(patch_offset_base +
771 (i * sizeof(u32)));
772 break;
773 }
774 }
775
776 if (!patch_offset) {
777 rtl_dev_err(hdev, "didn't find patch for chip id %d",
778 btrtl_dev->rom_version);
779 return -EINVAL;
780 }
781
782 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
783 min_size = patch_offset + patch_length;
784 if (btrtl_dev->fw_len < min_size)
785 return -EINVAL;
786
787 /* Copy the firmware into a new buffer and write the version at
788 * the end.
789 */
790 len = patch_length;
791 buf = kvmalloc(patch_length, GFP_KERNEL);
792 if (!buf)
793 return -ENOMEM;
794
795 memcpy(buf, btrtl_dev->fw_data + patch_offset, patch_length - 4);
796 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
797
798 *_buf = buf;
799 return len;
800}
801
802static int rtl_download_firmware(struct hci_dev *hdev,
803 const unsigned char *data, int fw_len)
804{
805 struct rtl_download_cmd *dl_cmd;
806 int frag_num = fw_len / RTL_FRAG_LEN + 1;
807 int frag_len = RTL_FRAG_LEN;
808 int ret = 0;
809 int i;
810 int j = 0;
811 struct sk_buff *skb;
812 struct hci_rp_read_local_version *rp;
813
814 dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
815 if (!dl_cmd)
816 return -ENOMEM;
817
818 for (i = 0; i < frag_num; i++) {
819 struct sk_buff *skb;
820
821 dl_cmd->index = j++;
822 if (dl_cmd->index == 0x7f)
823 j = 1;
824
825 if (i == (frag_num - 1)) {
826 dl_cmd->index |= 0x80; /* data end */
827 frag_len = fw_len % RTL_FRAG_LEN;
828 }
829 rtl_dev_dbg(hdev, "download fw (%d/%d). index = %d", i,
830 frag_num, dl_cmd->index);
831 memcpy(dl_cmd->data, data, frag_len);
832
833 /* Send download command */
834 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
835 HCI_INIT_TIMEOUT);
836 if (IS_ERR(skb)) {
837 rtl_dev_err(hdev, "download fw command failed (%ld)",
838 PTR_ERR(skb));
839 ret = PTR_ERR(skb);
840 goto out;
841 }
842
843 if (skb->len != sizeof(struct rtl_download_response)) {
844 rtl_dev_err(hdev, "download fw event length mismatch");
845 kfree_skb(skb);
846 ret = -EIO;
847 goto out;
848 }
849
850 kfree_skb(skb);
851 data += RTL_FRAG_LEN;
852 }
853
854 skb = btrtl_read_local_version(hdev);
855 if (IS_ERR(skb)) {
856 ret = PTR_ERR(skb);
857 rtl_dev_err(hdev, "read local version failed");
858 goto out;
859 }
860
861 rp = (struct hci_rp_read_local_version *)skb->data;
862 rtl_dev_info(hdev, "fw version 0x%04x%04x",
863 __le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver));
864 kfree_skb(skb);
865
866out:
867 kfree(dl_cmd);
868 return ret;
869}
870
871static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
872{
873 const struct firmware *fw;
874 int ret;
875
876 rtl_dev_info(hdev, "loading %s", name);
877 ret = request_firmware(&fw, name, &hdev->dev);
878 if (ret < 0)
879 return ret;
880 ret = fw->size;
881 *buff = kvmalloc(fw->size, GFP_KERNEL);
882 if (*buff)
883 memcpy(*buff, fw->data, ret);
884 else
885 ret = -ENOMEM;
886
887 release_firmware(fw);
888
889 return ret;
890}
891
892static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
893 struct btrtl_device_info *btrtl_dev)
894{
895 if (btrtl_dev->fw_len < 8)
896 return -EINVAL;
897
898 /* Check that the firmware doesn't have the epatch signature
899 * (which is only for RTL8723B and newer).
900 */
901 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
902 rtl_dev_err(hdev, "unexpected EPATCH signature!");
903 return -EINVAL;
904 }
905
906 return rtl_download_firmware(hdev, btrtl_dev->fw_data,
907 btrtl_dev->fw_len);
908}
909
910static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
911 struct btrtl_device_info *btrtl_dev)
912{
913 unsigned char *fw_data = NULL;
914 int ret;
915 u8 *tbuff;
916
917 ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
918 if (ret < 0)
919 goto out;
920
921 if (btrtl_dev->cfg_len > 0) {
922 tbuff = kvzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
923 if (!tbuff) {
924 ret = -ENOMEM;
925 goto out;
926 }
927
928 memcpy(tbuff, fw_data, ret);
929 kvfree(fw_data);
930
931 memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
932 ret += btrtl_dev->cfg_len;
933
934 fw_data = tbuff;
935 }
936
937 rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret);
938
939 ret = rtl_download_firmware(hdev, fw_data, ret);
940
941out:
942 kvfree(fw_data);
943 return ret;
944}
945
946static void btrtl_coredump(struct hci_dev *hdev)
947{
948 static const u8 param[] = { 0x00, 0x00 };
949
950 __hci_cmd_send(hdev, RTL_VSC_OP_COREDUMP, sizeof(param), param);
951}
952
953static void btrtl_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
954{
955 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
956 char buf[80];
957
958 if (coredump_info->rtl_dump.controller)
959 snprintf(buf, sizeof(buf), "Controller Name: %s\n",
960 coredump_info->rtl_dump.controller);
961 else
962 snprintf(buf, sizeof(buf), "Controller Name: Unknown\n");
963 skb_put_data(skb, buf, strlen(buf));
964
965 snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
966 coredump_info->rtl_dump.fw_version);
967 skb_put_data(skb, buf, strlen(buf));
968
969 snprintf(buf, sizeof(buf), "Driver: %s\n", coredump_info->rtl_dump.driver_name);
970 skb_put_data(skb, buf, strlen(buf));
971
972 snprintf(buf, sizeof(buf), "Vendor: Realtek\n");
973 skb_put_data(skb, buf, strlen(buf));
974}
975
976static void btrtl_register_devcoredump_support(struct hci_dev *hdev)
977{
978 hci_devcd_register(hdev, btrtl_coredump, btrtl_dmp_hdr, NULL);
979
980}
981
982void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name)
983{
984 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
985
986 coredump_info->rtl_dump.driver_name = driver_name;
987}
988EXPORT_SYMBOL_GPL(btrtl_set_driver_name);
989
990static bool rtl_has_chip_type(u16 lmp_subver)
991{
992 switch (lmp_subver) {
993 case RTL_ROM_LMP_8703B:
994 return true;
995 default:
996 break;
997 }
998
999 return false;
1000}
1001
1002static int rtl_read_chip_type(struct hci_dev *hdev, u8 *type)
1003{
1004 struct rtl_chip_type_evt *chip_type;
1005 struct sk_buff *skb;
1006 const unsigned char cmd_buf[] = {0x00, 0x94, 0xa0, 0x00, 0xb0};
1007
1008 /* Read RTL chip type command */
1009 skb = __hci_cmd_sync(hdev, 0xfc61, 5, cmd_buf, HCI_INIT_TIMEOUT);
1010 if (IS_ERR(skb)) {
1011 rtl_dev_err(hdev, "Read chip type failed (%ld)",
1012 PTR_ERR(skb));
1013 return PTR_ERR(skb);
1014 }
1015
1016 chip_type = skb_pull_data(skb, sizeof(*chip_type));
1017 if (!chip_type) {
1018 rtl_dev_err(hdev, "RTL chip type event length mismatch");
1019 kfree_skb(skb);
1020 return -EIO;
1021 }
1022
1023 rtl_dev_info(hdev, "chip_type status=%x type=%x",
1024 chip_type->status, chip_type->type);
1025
1026 *type = chip_type->type & 0x0f;
1027
1028 kfree_skb(skb);
1029 return 0;
1030}
1031
1032void btrtl_free(struct btrtl_device_info *btrtl_dev)
1033{
1034 struct rtl_subsection *entry, *tmp;
1035
1036 kvfree(btrtl_dev->fw_data);
1037 kvfree(btrtl_dev->cfg_data);
1038
1039 list_for_each_entry_safe(entry, tmp, &btrtl_dev->patch_subsecs, list) {
1040 list_del(&entry->list);
1041 kfree(entry);
1042 }
1043
1044 kfree(btrtl_dev);
1045}
1046EXPORT_SYMBOL_GPL(btrtl_free);
1047
1048struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
1049 const char *postfix)
1050{
1051 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
1052 struct btrtl_device_info *btrtl_dev;
1053 struct sk_buff *skb;
1054 struct hci_rp_read_local_version *resp;
1055 struct hci_command_hdr *cmd;
1056 char fw_name[40];
1057 char cfg_name[40];
1058 u16 hci_rev, lmp_subver;
1059 u8 hci_ver, lmp_ver, chip_type = 0;
1060 int ret;
1061 u8 reg_val[2];
1062
1063 btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
1064 if (!btrtl_dev) {
1065 ret = -ENOMEM;
1066 goto err_alloc;
1067 }
1068
1069 INIT_LIST_HEAD(&btrtl_dev->patch_subsecs);
1070
1071check_version:
1072 ret = btrtl_vendor_read_reg16(hdev, RTL_CHIP_SUBVER, reg_val);
1073 if (ret < 0)
1074 goto err_free;
1075 lmp_subver = get_unaligned_le16(reg_val);
1076
1077 if (lmp_subver == RTL_ROM_LMP_8822B) {
1078 ret = btrtl_vendor_read_reg16(hdev, RTL_CHIP_REV, reg_val);
1079 if (ret < 0)
1080 goto err_free;
1081 hci_rev = get_unaligned_le16(reg_val);
1082
1083 /* 8822E */
1084 if (hci_rev == 0x000e) {
1085 hci_ver = 0x0c;
1086 lmp_ver = 0x0c;
1087 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev,
1088 hci_ver, hdev->bus,
1089 chip_type);
1090 goto next;
1091 }
1092 }
1093
1094 skb = btrtl_read_local_version(hdev);
1095 if (IS_ERR(skb)) {
1096 ret = PTR_ERR(skb);
1097 goto err_free;
1098 }
1099
1100 resp = (struct hci_rp_read_local_version *)skb->data;
1101
1102 hci_ver = resp->hci_ver;
1103 hci_rev = le16_to_cpu(resp->hci_rev);
1104 lmp_ver = resp->lmp_ver;
1105 lmp_subver = le16_to_cpu(resp->lmp_subver);
1106
1107 kfree_skb(skb);
1108
1109 if (rtl_has_chip_type(lmp_subver)) {
1110 ret = rtl_read_chip_type(hdev, &chip_type);
1111 if (ret)
1112 goto err_free;
1113 }
1114
1115 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
1116 hdev->bus, chip_type);
1117
1118next:
1119 rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
1120 hci_ver, hci_rev,
1121 lmp_ver, lmp_subver);
1122
1123 if (!btrtl_dev->ic_info && !btrtl_dev->drop_fw)
1124 btrtl_dev->drop_fw = true;
1125 else
1126 btrtl_dev->drop_fw = false;
1127
1128 if (btrtl_dev->drop_fw) {
1129 skb = bt_skb_alloc(sizeof(*cmd), GFP_KERNEL);
1130 if (!skb)
1131 goto err_free;
1132
1133 cmd = skb_put(skb, HCI_COMMAND_HDR_SIZE);
1134 cmd->opcode = cpu_to_le16(0xfc66);
1135 cmd->plen = 0;
1136
1137 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1138
1139 ret = hdev->send(hdev, skb);
1140 if (ret < 0) {
1141 bt_dev_err(hdev, "sending frame failed (%d)", ret);
1142 kfree_skb(skb);
1143 goto err_free;
1144 }
1145
1146 /* Ensure the above vendor command is sent to controller and
1147 * process has done.
1148 */
1149 msleep(200);
1150
1151 goto check_version;
1152 }
1153
1154 if (!btrtl_dev->ic_info) {
1155 rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
1156 lmp_subver, hci_rev, hci_ver);
1157 return btrtl_dev;
1158 }
1159
1160 if (btrtl_dev->ic_info->has_rom_version) {
1161 ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version);
1162 if (ret)
1163 goto err_free;
1164 }
1165
1166 if (!btrtl_dev->ic_info->fw_name) {
1167 ret = -ENOMEM;
1168 goto err_free;
1169 }
1170
1171 btrtl_dev->fw_len = -EIO;
1172 if (lmp_subver == RTL_ROM_LMP_8852A && hci_rev == 0x000c) {
1173 snprintf(fw_name, sizeof(fw_name), "%s_v2.bin",
1174 btrtl_dev->ic_info->fw_name);
1175 btrtl_dev->fw_len = rtl_load_file(hdev, fw_name,
1176 &btrtl_dev->fw_data);
1177 }
1178
1179 if (btrtl_dev->fw_len < 0) {
1180 snprintf(fw_name, sizeof(fw_name), "%s.bin",
1181 btrtl_dev->ic_info->fw_name);
1182 btrtl_dev->fw_len = rtl_load_file(hdev, fw_name,
1183 &btrtl_dev->fw_data);
1184 }
1185
1186 if (btrtl_dev->fw_len < 0) {
1187 rtl_dev_err(hdev, "firmware file %s not found",
1188 btrtl_dev->ic_info->fw_name);
1189 ret = btrtl_dev->fw_len;
1190 goto err_free;
1191 }
1192
1193 if (btrtl_dev->ic_info->cfg_name) {
1194 if (postfix) {
1195 snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin",
1196 btrtl_dev->ic_info->cfg_name, postfix);
1197 } else {
1198 snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
1199 btrtl_dev->ic_info->cfg_name);
1200 }
1201 btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
1202 &btrtl_dev->cfg_data);
1203 if (btrtl_dev->ic_info->config_needed &&
1204 btrtl_dev->cfg_len <= 0) {
1205 rtl_dev_err(hdev, "mandatory config file %s not found",
1206 btrtl_dev->ic_info->cfg_name);
1207 ret = btrtl_dev->cfg_len;
1208 goto err_free;
1209 }
1210 }
1211
1212 /* The following chips supports the Microsoft vendor extension,
1213 * therefore set the corresponding VsMsftOpCode.
1214 */
1215 if (btrtl_dev->ic_info->has_msft_ext)
1216 hci_set_msft_opcode(hdev, 0xFCF0);
1217
1218 if (btrtl_dev->ic_info)
1219 coredump_info->rtl_dump.controller = btrtl_dev->ic_info->hw_info;
1220
1221 return btrtl_dev;
1222
1223err_free:
1224 btrtl_free(btrtl_dev);
1225err_alloc:
1226 return ERR_PTR(ret);
1227}
1228EXPORT_SYMBOL_GPL(btrtl_initialize);
1229
1230int btrtl_download_firmware(struct hci_dev *hdev,
1231 struct btrtl_device_info *btrtl_dev)
1232{
1233 int err = 0;
1234
1235 /* Match a set of subver values that correspond to stock firmware,
1236 * which is not compatible with standard btusb.
1237 * If matched, upload an alternative firmware that does conform to
1238 * standard btusb. Once that firmware is uploaded, the subver changes
1239 * to a different value.
1240 */
1241 if (!btrtl_dev->ic_info) {
1242 rtl_dev_info(hdev, "assuming no firmware upload needed");
1243 err = 0;
1244 goto done;
1245 }
1246
1247 switch (btrtl_dev->ic_info->lmp_subver) {
1248 case RTL_ROM_LMP_8723A:
1249 err = btrtl_setup_rtl8723a(hdev, btrtl_dev);
1250 break;
1251 case RTL_ROM_LMP_8723B:
1252 case RTL_ROM_LMP_8821A:
1253 case RTL_ROM_LMP_8761A:
1254 case RTL_ROM_LMP_8822B:
1255 case RTL_ROM_LMP_8852A:
1256 case RTL_ROM_LMP_8703B:
1257 case RTL_ROM_LMP_8851B:
1258 err = btrtl_setup_rtl8723b(hdev, btrtl_dev);
1259 break;
1260 default:
1261 rtl_dev_info(hdev, "assuming no firmware upload needed");
1262 break;
1263 }
1264
1265done:
1266 btrtl_register_devcoredump_support(hdev);
1267
1268 return err;
1269}
1270EXPORT_SYMBOL_GPL(btrtl_download_firmware);
1271
1272void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
1273{
1274 /* Enable controller to do both LE scan and BR/EDR inquiry
1275 * simultaneously.
1276 */
1277 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1278
1279 /* Enable central-peripheral role (able to create new connections with
1280 * an existing connection in slave role).
1281 */
1282 /* Enable WBS supported for the specific Realtek devices. */
1283 switch (btrtl_dev->project_id) {
1284 case CHIP_ID_8822C:
1285 case CHIP_ID_8852A:
1286 case CHIP_ID_8852B:
1287 case CHIP_ID_8852C:
1288 case CHIP_ID_8851B:
1289 case CHIP_ID_8852BT:
1290 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
1291 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1292
1293 /* RTL8852C needs to transmit mSBC data continuously without
1294 * the zero length of USB packets for the ALT 6 supported chips
1295 */
1296 if (btrtl_dev->project_id == CHIP_ID_8852C)
1297 btrealtek_set_flag(hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP);
1298
1299 if (btrtl_dev->project_id == CHIP_ID_8852A ||
1300 btrtl_dev->project_id == CHIP_ID_8852C)
1301 set_bit(HCI_QUIRK_USE_MSFT_EXT_ADDRESS_FILTER, &hdev->quirks);
1302
1303 hci_set_aosp_capable(hdev);
1304 break;
1305 default:
1306 rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
1307 rtl_dev_dbg(hdev, "WBS supported not enabled.");
1308 break;
1309 }
1310
1311 if (!btrtl_dev->ic_info)
1312 return;
1313
1314 switch (btrtl_dev->ic_info->lmp_subver) {
1315 case RTL_ROM_LMP_8703B:
1316 /* 8723CS reports two pages for local ext features,
1317 * but it doesn't support any features from page 2 -
1318 * it either responds with garbage or with error status
1319 */
1320 set_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
1321 &hdev->quirks);
1322 break;
1323 default:
1324 break;
1325 }
1326}
1327EXPORT_SYMBOL_GPL(btrtl_set_quirks);
1328
1329int btrtl_setup_realtek(struct hci_dev *hdev)
1330{
1331 struct btrtl_device_info *btrtl_dev;
1332 int ret;
1333
1334 btrtl_dev = btrtl_initialize(hdev, NULL);
1335 if (IS_ERR(btrtl_dev))
1336 return PTR_ERR(btrtl_dev);
1337
1338 ret = btrtl_download_firmware(hdev, btrtl_dev);
1339
1340 btrtl_set_quirks(hdev, btrtl_dev);
1341
1342 btrtl_free(btrtl_dev);
1343 return ret;
1344}
1345EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
1346
1347int btrtl_shutdown_realtek(struct hci_dev *hdev)
1348{
1349 struct sk_buff *skb;
1350 int ret;
1351
1352 /* According to the vendor driver, BT must be reset on close to avoid
1353 * firmware crash.
1354 */
1355 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1356 if (IS_ERR(skb)) {
1357 ret = PTR_ERR(skb);
1358 bt_dev_err(hdev, "HCI reset during shutdown failed");
1359 return ret;
1360 }
1361 kfree_skb(skb);
1362
1363 return 0;
1364}
1365EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek);
1366
1367static unsigned int btrtl_convert_baudrate(u32 device_baudrate)
1368{
1369 switch (device_baudrate) {
1370 case 0x0252a00a:
1371 return 230400;
1372
1373 case 0x05f75004:
1374 return 921600;
1375
1376 case 0x00005004:
1377 return 1000000;
1378
1379 case 0x04928002:
1380 case 0x01128002:
1381 return 1500000;
1382
1383 case 0x00005002:
1384 return 2000000;
1385
1386 case 0x0000b001:
1387 return 2500000;
1388
1389 case 0x04928001:
1390 return 3000000;
1391
1392 case 0x052a6001:
1393 return 3500000;
1394
1395 case 0x00005001:
1396 return 4000000;
1397
1398 case 0x0252c014:
1399 default:
1400 return 115200;
1401 }
1402}
1403
1404int btrtl_get_uart_settings(struct hci_dev *hdev,
1405 struct btrtl_device_info *btrtl_dev,
1406 unsigned int *controller_baudrate,
1407 u32 *device_baudrate, bool *flow_control)
1408{
1409 struct rtl_vendor_config *config;
1410 struct rtl_vendor_config_entry *entry;
1411 int i, total_data_len;
1412 bool found = false;
1413
1414 total_data_len = btrtl_dev->cfg_len - sizeof(*config);
1415 if (total_data_len <= 0) {
1416 rtl_dev_warn(hdev, "no config loaded");
1417 return -EINVAL;
1418 }
1419
1420 config = (struct rtl_vendor_config *)btrtl_dev->cfg_data;
1421 if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) {
1422 rtl_dev_err(hdev, "invalid config magic");
1423 return -EINVAL;
1424 }
1425
1426 if (total_data_len < le16_to_cpu(config->total_len)) {
1427 rtl_dev_err(hdev, "config is too short");
1428 return -EINVAL;
1429 }
1430
1431 for (i = 0; i < total_data_len; ) {
1432 entry = ((void *)config->entry) + i;
1433
1434 switch (le16_to_cpu(entry->offset)) {
1435 case 0xc:
1436 if (entry->len < sizeof(*device_baudrate)) {
1437 rtl_dev_err(hdev, "invalid UART config entry");
1438 return -EINVAL;
1439 }
1440
1441 *device_baudrate = get_unaligned_le32(entry->data);
1442 *controller_baudrate = btrtl_convert_baudrate(
1443 *device_baudrate);
1444
1445 if (entry->len >= 13)
1446 *flow_control = !!(entry->data[12] & BIT(2));
1447 else
1448 *flow_control = false;
1449
1450 found = true;
1451 break;
1452
1453 default:
1454 rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)",
1455 le16_to_cpu(entry->offset), entry->len);
1456 break;
1457 }
1458
1459 i += sizeof(*entry) + entry->len;
1460 }
1461
1462 if (!found) {
1463 rtl_dev_err(hdev, "no UART config entry found");
1464 return -ENOENT;
1465 }
1466
1467 rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate);
1468 rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate);
1469 rtl_dev_dbg(hdev, "flow control %d", *flow_control);
1470
1471 return 0;
1472}
1473EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
1474
1475MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
1476MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
1477MODULE_VERSION(VERSION);
1478MODULE_LICENSE("GPL");
1479MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
1480MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
1481MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
1482MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
1483MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
1484MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_fw.bin");
1485MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_config.bin");
1486MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_fw.bin");
1487MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_config.bin");
1488MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_fw.bin");
1489MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_config.bin");
1490MODULE_FIRMWARE("rtl_bt/rtl8723d_fw.bin");
1491MODULE_FIRMWARE("rtl_bt/rtl8723d_config.bin");
1492MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
1493MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
1494MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
1495MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
1496MODULE_FIRMWARE("rtl_bt/rtl8761b_fw.bin");
1497MODULE_FIRMWARE("rtl_bt/rtl8761b_config.bin");
1498MODULE_FIRMWARE("rtl_bt/rtl8761bu_fw.bin");
1499MODULE_FIRMWARE("rtl_bt/rtl8761bu_config.bin");
1500MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
1501MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
1502MODULE_FIRMWARE("rtl_bt/rtl8821c_fw.bin");
1503MODULE_FIRMWARE("rtl_bt/rtl8821c_config.bin");
1504MODULE_FIRMWARE("rtl_bt/rtl8821cs_fw.bin");
1505MODULE_FIRMWARE("rtl_bt/rtl8821cs_config.bin");
1506MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
1507MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");
1508MODULE_FIRMWARE("rtl_bt/rtl8822cs_fw.bin");
1509MODULE_FIRMWARE("rtl_bt/rtl8822cs_config.bin");
1510MODULE_FIRMWARE("rtl_bt/rtl8822cu_fw.bin");
1511MODULE_FIRMWARE("rtl_bt/rtl8822cu_config.bin");
1512MODULE_FIRMWARE("rtl_bt/rtl8851bu_fw.bin");
1513MODULE_FIRMWARE("rtl_bt/rtl8851bu_config.bin");
1514MODULE_FIRMWARE("rtl_bt/rtl8852au_fw.bin");
1515MODULE_FIRMWARE("rtl_bt/rtl8852au_config.bin");
1516MODULE_FIRMWARE("rtl_bt/rtl8852bs_fw.bin");
1517MODULE_FIRMWARE("rtl_bt/rtl8852bs_config.bin");
1518MODULE_FIRMWARE("rtl_bt/rtl8852bu_fw.bin");
1519MODULE_FIRMWARE("rtl_bt/rtl8852bu_config.bin");
1520MODULE_FIRMWARE("rtl_bt/rtl8852btu_fw.bin");
1521MODULE_FIRMWARE("rtl_bt/rtl8852btu_config.bin");
1522MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw.bin");
1523MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw_v2.bin");
1524MODULE_FIRMWARE("rtl_bt/rtl8852cu_config.bin");