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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/*
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
38#define IC_MATCH_FL_LMPSUBV (1 << 0)
39#define IC_MATCH_FL_HCIREV (1 << 1)
40#define IC_INFO(lmps, hcir) \
41 .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV, \
42 .lmp_subver = (lmps), \
43 .hci_rev = (hcir)
44
45struct id_table {
46 __u16 match_flags;
47 __u16 lmp_subver;
48 __u16 hci_rev;
49 bool config_needed;
50 char *fw_name;
51 char *cfg_name;
52};
53
54static const struct id_table ic_id_table[] = {
55 /* 8723B */
56 { IC_INFO(RTL_ROM_LMP_8723B, 0xb),
57 .config_needed = false,
58 .fw_name = "rtl_bt/rtl8723b_fw.bin",
59 .cfg_name = "rtl_bt/rtl8723b_config.bin" },
60
61 /* 8723D */
62 { IC_INFO(RTL_ROM_LMP_8723B, 0xd),
63 .config_needed = true,
64 .fw_name = "rtl_bt/rtl8723d_fw.bin",
65 .cfg_name = "rtl_bt/rtl8723d_config.bin" },
66
67 /* 8821A */
68 { IC_INFO(RTL_ROM_LMP_8821A, 0xa),
69 .config_needed = false,
70 .fw_name = "rtl_bt/rtl8821a_fw.bin",
71 .cfg_name = "rtl_bt/rtl8821a_config.bin" },
72
73 /* 8821C */
74 { IC_INFO(RTL_ROM_LMP_8821A, 0xc),
75 .config_needed = false,
76 .fw_name = "rtl_bt/rtl8821c_fw.bin",
77 .cfg_name = "rtl_bt/rtl8821c_config.bin" },
78
79 /* 8761A */
80 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8761A, 0x0,
81 .config_needed = false,
82 .fw_name = "rtl_bt/rtl8761a_fw.bin",
83 .cfg_name = "rtl_bt/rtl8761a_config.bin" },
84
85 /* 8822B */
86 { IC_INFO(RTL_ROM_LMP_8822B, 0xb),
87 .config_needed = true,
88 .fw_name = "rtl_bt/rtl8822b_fw.bin",
89 .cfg_name = "rtl_bt/rtl8822b_config.bin" },
90 };
91
92static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
93{
94 struct rtl_rom_version_evt *rom_version;
95 struct sk_buff *skb;
96
97 /* Read RTL ROM version command */
98 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
99 if (IS_ERR(skb)) {
100 BT_ERR("%s: Read ROM version failed (%ld)",
101 hdev->name, PTR_ERR(skb));
102 return PTR_ERR(skb);
103 }
104
105 if (skb->len != sizeof(*rom_version)) {
106 BT_ERR("%s: RTL version event length mismatch", hdev->name);
107 kfree_skb(skb);
108 return -EIO;
109 }
110
111 rom_version = (struct rtl_rom_version_evt *)skb->data;
112 bt_dev_info(hdev, "rom_version status=%x version=%x",
113 rom_version->status, rom_version->version);
114
115 *version = rom_version->version;
116
117 kfree_skb(skb);
118 return 0;
119}
120
121static int rtlbt_parse_firmware(struct hci_dev *hdev, u16 lmp_subver,
122 const struct firmware *fw,
123 unsigned char **_buf)
124{
125 const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
126 struct rtl_epatch_header *epatch_info;
127 unsigned char *buf;
128 int i, ret, len;
129 size_t min_size;
130 u8 opcode, length, data, rom_version = 0;
131 int project_id = -1;
132 const unsigned char *fwptr, *chip_id_base;
133 const unsigned char *patch_length_base, *patch_offset_base;
134 u32 patch_offset = 0;
135 u16 patch_length, num_patches;
136 static const struct {
137 __u16 lmp_subver;
138 __u8 id;
139 } project_id_to_lmp_subver[] = {
140 { RTL_ROM_LMP_8723A, 0 },
141 { RTL_ROM_LMP_8723B, 1 },
142 { RTL_ROM_LMP_8821A, 2 },
143 { RTL_ROM_LMP_8761A, 3 },
144 { RTL_ROM_LMP_8822B, 8 },
145 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */
146 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */
147 };
148
149 ret = rtl_read_rom_version(hdev, &rom_version);
150 if (ret)
151 return ret;
152
153 min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
154 if (fw->size < min_size)
155 return -EINVAL;
156
157 fwptr = fw->data + fw->size - sizeof(extension_sig);
158 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
159 BT_ERR("%s: extension section signature mismatch", hdev->name);
160 return -EINVAL;
161 }
162
163 /* Loop from the end of the firmware parsing instructions, until
164 * we find an instruction that identifies the "project ID" for the
165 * hardware supported by this firwmare file.
166 * Once we have that, we double-check that that project_id is suitable
167 * for the hardware we are working with.
168 */
169 while (fwptr >= fw->data + (sizeof(struct rtl_epatch_header) + 3)) {
170 opcode = *--fwptr;
171 length = *--fwptr;
172 data = *--fwptr;
173
174 BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
175
176 if (opcode == 0xff) /* EOF */
177 break;
178
179 if (length == 0) {
180 BT_ERR("%s: found instruction with length 0",
181 hdev->name);
182 return -EINVAL;
183 }
184
185 if (opcode == 0 && length == 1) {
186 project_id = data;
187 break;
188 }
189
190 fwptr -= length;
191 }
192
193 if (project_id < 0) {
194 BT_ERR("%s: failed to find version instruction", hdev->name);
195 return -EINVAL;
196 }
197
198 /* Find project_id in table */
199 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
200 if (project_id == project_id_to_lmp_subver[i].id)
201 break;
202 }
203
204 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
205 BT_ERR("%s: unknown project id %d", hdev->name, project_id);
206 return -EINVAL;
207 }
208
209 if (lmp_subver != project_id_to_lmp_subver[i].lmp_subver) {
210 BT_ERR("%s: firmware is for %x but this is a %x", hdev->name,
211 project_id_to_lmp_subver[i].lmp_subver, lmp_subver);
212 return -EINVAL;
213 }
214
215 epatch_info = (struct rtl_epatch_header *)fw->data;
216 if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
217 BT_ERR("%s: bad EPATCH signature", hdev->name);
218 return -EINVAL;
219 }
220
221 num_patches = le16_to_cpu(epatch_info->num_patches);
222 BT_DBG("fw_version=%x, num_patches=%d",
223 le32_to_cpu(epatch_info->fw_version), num_patches);
224
225 /* After the rtl_epatch_header there is a funky patch metadata section.
226 * Assuming 2 patches, the layout is:
227 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
228 *
229 * Find the right patch for this chip.
230 */
231 min_size += 8 * num_patches;
232 if (fw->size < min_size)
233 return -EINVAL;
234
235 chip_id_base = fw->data + sizeof(struct rtl_epatch_header);
236 patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
237 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
238 for (i = 0; i < num_patches; i++) {
239 u16 chip_id = get_unaligned_le16(chip_id_base +
240 (i * sizeof(u16)));
241 if (chip_id == rom_version + 1) {
242 patch_length = get_unaligned_le16(patch_length_base +
243 (i * sizeof(u16)));
244 patch_offset = get_unaligned_le32(patch_offset_base +
245 (i * sizeof(u32)));
246 break;
247 }
248 }
249
250 if (!patch_offset) {
251 BT_ERR("%s: didn't find patch for chip id %d",
252 hdev->name, rom_version);
253 return -EINVAL;
254 }
255
256 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
257 min_size = patch_offset + patch_length;
258 if (fw->size < min_size)
259 return -EINVAL;
260
261 /* Copy the firmware into a new buffer and write the version at
262 * the end.
263 */
264 len = patch_length;
265 buf = kmemdup(fw->data + patch_offset, patch_length, GFP_KERNEL);
266 if (!buf)
267 return -ENOMEM;
268
269 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
270
271 *_buf = buf;
272 return len;
273}
274
275static int rtl_download_firmware(struct hci_dev *hdev,
276 const unsigned char *data, int fw_len)
277{
278 struct rtl_download_cmd *dl_cmd;
279 int frag_num = fw_len / RTL_FRAG_LEN + 1;
280 int frag_len = RTL_FRAG_LEN;
281 int ret = 0;
282 int i;
283
284 dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
285 if (!dl_cmd)
286 return -ENOMEM;
287
288 for (i = 0; i < frag_num; i++) {
289 struct sk_buff *skb;
290
291 BT_DBG("download fw (%d/%d)", i, frag_num);
292
293 dl_cmd->index = i;
294 if (i == (frag_num - 1)) {
295 dl_cmd->index |= 0x80; /* data end */
296 frag_len = fw_len % RTL_FRAG_LEN;
297 }
298 memcpy(dl_cmd->data, data, frag_len);
299
300 /* Send download command */
301 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
302 HCI_INIT_TIMEOUT);
303 if (IS_ERR(skb)) {
304 BT_ERR("%s: download fw command failed (%ld)",
305 hdev->name, PTR_ERR(skb));
306 ret = -PTR_ERR(skb);
307 goto out;
308 }
309
310 if (skb->len != sizeof(struct rtl_download_response)) {
311 BT_ERR("%s: download fw event length mismatch",
312 hdev->name);
313 kfree_skb(skb);
314 ret = -EIO;
315 goto out;
316 }
317
318 kfree_skb(skb);
319 data += RTL_FRAG_LEN;
320 }
321
322out:
323 kfree(dl_cmd);
324 return ret;
325}
326
327static int rtl_load_config(struct hci_dev *hdev, const char *name, u8 **buff)
328{
329 const struct firmware *fw;
330 int ret;
331
332 bt_dev_info(hdev, "rtl: loading %s", name);
333 ret = request_firmware(&fw, name, &hdev->dev);
334 if (ret < 0)
335 return ret;
336 ret = fw->size;
337 *buff = kmemdup(fw->data, ret, GFP_KERNEL);
338 if (!*buff)
339 ret = -ENOMEM;
340
341 release_firmware(fw);
342
343 return ret;
344}
345
346static int btrtl_setup_rtl8723a(struct hci_dev *hdev)
347{
348 const struct firmware *fw;
349 int ret;
350
351 bt_dev_info(hdev, "rtl: loading rtl_bt/rtl8723a_fw.bin");
352 ret = request_firmware(&fw, "rtl_bt/rtl8723a_fw.bin", &hdev->dev);
353 if (ret < 0) {
354 BT_ERR("%s: Failed to load rtl_bt/rtl8723a_fw.bin", hdev->name);
355 return ret;
356 }
357
358 if (fw->size < 8) {
359 ret = -EINVAL;
360 goto out;
361 }
362
363 /* Check that the firmware doesn't have the epatch signature
364 * (which is only for RTL8723B and newer).
365 */
366 if (!memcmp(fw->data, RTL_EPATCH_SIGNATURE, 8)) {
367 BT_ERR("%s: unexpected EPATCH signature!", hdev->name);
368 ret = -EINVAL;
369 goto out;
370 }
371
372 ret = rtl_download_firmware(hdev, fw->data, fw->size);
373
374out:
375 release_firmware(fw);
376 return ret;
377}
378
379static int btrtl_setup_rtl8723b(struct hci_dev *hdev, u16 hci_rev,
380 u16 lmp_subver)
381{
382 unsigned char *fw_data = NULL;
383 const struct firmware *fw;
384 int ret;
385 int cfg_sz;
386 u8 *cfg_buff = NULL;
387 u8 *tbuff;
388 char *cfg_name = NULL;
389 char *fw_name = NULL;
390 int i;
391
392 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
393 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
394 (ic_id_table[i].lmp_subver != lmp_subver))
395 continue;
396 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
397 (ic_id_table[i].hci_rev != hci_rev))
398 continue;
399
400 break;
401 }
402
403 if (i >= ARRAY_SIZE(ic_id_table)) {
404 BT_ERR("%s: unknown IC info, lmp subver %04x, hci rev %04x",
405 hdev->name, lmp_subver, hci_rev);
406 return -EINVAL;
407 }
408
409 cfg_name = ic_id_table[i].cfg_name;
410
411 if (cfg_name) {
412 cfg_sz = rtl_load_config(hdev, cfg_name, &cfg_buff);
413 if (cfg_sz < 0) {
414 cfg_sz = 0;
415 if (ic_id_table[i].config_needed)
416 BT_ERR("Necessary config file %s not found\n",
417 cfg_name);
418 }
419 } else
420 cfg_sz = 0;
421
422 fw_name = ic_id_table[i].fw_name;
423 bt_dev_info(hdev, "rtl: loading %s", fw_name);
424 ret = request_firmware(&fw, fw_name, &hdev->dev);
425 if (ret < 0) {
426 BT_ERR("%s: Failed to load %s", hdev->name, fw_name);
427 goto err_req_fw;
428 }
429
430 ret = rtlbt_parse_firmware(hdev, lmp_subver, fw, &fw_data);
431 if (ret < 0)
432 goto out;
433
434 if (cfg_sz) {
435 tbuff = kzalloc(ret + cfg_sz, GFP_KERNEL);
436 if (!tbuff) {
437 ret = -ENOMEM;
438 goto out;
439 }
440
441 memcpy(tbuff, fw_data, ret);
442 kfree(fw_data);
443
444 memcpy(tbuff + ret, cfg_buff, cfg_sz);
445 ret += cfg_sz;
446
447 fw_data = tbuff;
448 }
449
450 bt_dev_info(hdev, "cfg_sz %d, total size %d", cfg_sz, ret);
451
452 ret = rtl_download_firmware(hdev, fw_data, ret);
453
454out:
455 release_firmware(fw);
456 kfree(fw_data);
457err_req_fw:
458 if (cfg_sz)
459 kfree(cfg_buff);
460 return ret;
461}
462
463static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
464{
465 struct sk_buff *skb;
466
467 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
468 HCI_INIT_TIMEOUT);
469 if (IS_ERR(skb)) {
470 BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION failed (%ld)",
471 hdev->name, PTR_ERR(skb));
472 return skb;
473 }
474
475 if (skb->len != sizeof(struct hci_rp_read_local_version)) {
476 BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION event length mismatch",
477 hdev->name);
478 kfree_skb(skb);
479 return ERR_PTR(-EIO);
480 }
481
482 return skb;
483}
484
485int btrtl_setup_realtek(struct hci_dev *hdev)
486{
487 struct sk_buff *skb;
488 struct hci_rp_read_local_version *resp;
489 u16 hci_rev, lmp_subver;
490
491 skb = btrtl_read_local_version(hdev);
492 if (IS_ERR(skb))
493 return -PTR_ERR(skb);
494
495 resp = (struct hci_rp_read_local_version *)skb->data;
496 bt_dev_info(hdev, "rtl: examining hci_ver=%02x hci_rev=%04x "
497 "lmp_ver=%02x lmp_subver=%04x",
498 resp->hci_ver, resp->hci_rev,
499 resp->lmp_ver, resp->lmp_subver);
500
501 hci_rev = le16_to_cpu(resp->hci_rev);
502 lmp_subver = le16_to_cpu(resp->lmp_subver);
503 kfree_skb(skb);
504
505 /* Match a set of subver values that correspond to stock firmware,
506 * which is not compatible with standard btusb.
507 * If matched, upload an alternative firmware that does conform to
508 * standard btusb. Once that firmware is uploaded, the subver changes
509 * to a different value.
510 */
511 switch (lmp_subver) {
512 case RTL_ROM_LMP_8723A:
513 case RTL_ROM_LMP_3499:
514 return btrtl_setup_rtl8723a(hdev);
515 case RTL_ROM_LMP_8723B:
516 case RTL_ROM_LMP_8821A:
517 case RTL_ROM_LMP_8761A:
518 case RTL_ROM_LMP_8822B:
519 return btrtl_setup_rtl8723b(hdev, hci_rev, lmp_subver);
520 default:
521 bt_dev_info(hdev, "rtl: assuming no firmware upload needed");
522 return 0;
523 }
524}
525EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
526
527MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
528MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
529MODULE_VERSION(VERSION);
530MODULE_LICENSE("GPL");