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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_3499 0x3499
22#define RTL_ROM_LMP_8723A 0x1200
23#define RTL_ROM_LMP_8723B 0x8723
24#define RTL_ROM_LMP_8723D 0x8873
25#define RTL_ROM_LMP_8821A 0x8821
26#define RTL_ROM_LMP_8761A 0x8761
27#define RTL_ROM_LMP_8822B 0x8822
28#define RTL_CONFIG_MAGIC 0x8723ab55
29
30#define IC_MATCH_FL_LMPSUBV (1 << 0)
31#define IC_MATCH_FL_HCIREV (1 << 1)
32#define IC_MATCH_FL_HCIVER (1 << 2)
33#define IC_MATCH_FL_HCIBUS (1 << 3)
34#define IC_INFO(lmps, hcir) \
35 .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV, \
36 .lmp_subver = (lmps), \
37 .hci_rev = (hcir)
38
39struct id_table {
40 __u16 match_flags;
41 __u16 lmp_subver;
42 __u16 hci_rev;
43 __u8 hci_ver;
44 __u8 hci_bus;
45 bool config_needed;
46 bool has_rom_version;
47 char *fw_name;
48 char *cfg_name;
49};
50
51struct btrtl_device_info {
52 const struct id_table *ic_info;
53 u8 rom_version;
54 u8 *fw_data;
55 int fw_len;
56 u8 *cfg_data;
57 int cfg_len;
58};
59
60static const struct id_table ic_id_table[] = {
61 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8723A, 0x0,
62 .config_needed = false,
63 .has_rom_version = false,
64 .fw_name = "rtl_bt/rtl8723a_fw.bin",
65 .cfg_name = NULL },
66
67 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_3499, 0x0,
68 .config_needed = false,
69 .has_rom_version = false,
70 .fw_name = "rtl_bt/rtl8723a_fw.bin",
71 .cfg_name = NULL },
72
73 /* 8723BS */
74 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV |
75 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS,
76 .lmp_subver = RTL_ROM_LMP_8723B,
77 .hci_rev = 0xb,
78 .hci_ver = 6,
79 .hci_bus = HCI_UART,
80 .config_needed = true,
81 .has_rom_version = true,
82 .fw_name = "rtl_bt/rtl8723bs_fw.bin",
83 .cfg_name = "rtl_bt/rtl8723bs_config" },
84
85 /* 8723B */
86 { IC_INFO(RTL_ROM_LMP_8723B, 0xb),
87 .config_needed = false,
88 .has_rom_version = true,
89 .fw_name = "rtl_bt/rtl8723b_fw.bin",
90 .cfg_name = "rtl_bt/rtl8723b_config" },
91
92 /* 8723D */
93 { IC_INFO(RTL_ROM_LMP_8723B, 0xd),
94 .config_needed = true,
95 .has_rom_version = true,
96 .fw_name = "rtl_bt/rtl8723d_fw.bin",
97 .cfg_name = "rtl_bt/rtl8723d_config" },
98
99 /* 8723DS */
100 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV |
101 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS,
102 .lmp_subver = RTL_ROM_LMP_8723B,
103 .hci_rev = 0xd,
104 .hci_ver = 8,
105 .hci_bus = HCI_UART,
106 .config_needed = true,
107 .has_rom_version = true,
108 .fw_name = "rtl_bt/rtl8723ds_fw.bin",
109 .cfg_name = "rtl_bt/rtl8723ds_config" },
110
111 /* 8723DU */
112 { IC_INFO(RTL_ROM_LMP_8723D, 0x826C),
113 .config_needed = true,
114 .has_rom_version = true,
115 .fw_name = "rtl_bt/rtl8723d_fw.bin",
116 .cfg_name = "rtl_bt/rtl8723d_config" },
117
118 /* 8821A */
119 { IC_INFO(RTL_ROM_LMP_8821A, 0xa),
120 .config_needed = false,
121 .has_rom_version = true,
122 .fw_name = "rtl_bt/rtl8821a_fw.bin",
123 .cfg_name = "rtl_bt/rtl8821a_config" },
124
125 /* 8821C */
126 { IC_INFO(RTL_ROM_LMP_8821A, 0xc),
127 .config_needed = false,
128 .has_rom_version = true,
129 .fw_name = "rtl_bt/rtl8821c_fw.bin",
130 .cfg_name = "rtl_bt/rtl8821c_config" },
131
132 /* 8761A */
133 { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8761A, 0x0,
134 .config_needed = false,
135 .has_rom_version = true,
136 .fw_name = "rtl_bt/rtl8761a_fw.bin",
137 .cfg_name = "rtl_bt/rtl8761a_config" },
138
139 /* 8822C with USB interface */
140 { IC_INFO(RTL_ROM_LMP_8822B, 0xc),
141 .config_needed = false,
142 .has_rom_version = true,
143 .fw_name = "rtl_bt/rtl8822cu_fw.bin",
144 .cfg_name = "rtl_bt/rtl8822cu_config" },
145
146 /* 8822B */
147 { IC_INFO(RTL_ROM_LMP_8822B, 0xb),
148 .config_needed = true,
149 .has_rom_version = true,
150 .fw_name = "rtl_bt/rtl8822b_fw.bin",
151 .cfg_name = "rtl_bt/rtl8822b_config" },
152 };
153
154static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
155 u8 hci_ver, u8 hci_bus)
156{
157 int i;
158
159 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
160 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
161 (ic_id_table[i].lmp_subver != lmp_subver))
162 continue;
163 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
164 (ic_id_table[i].hci_rev != hci_rev))
165 continue;
166 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
167 (ic_id_table[i].hci_ver != hci_ver))
168 continue;
169 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
170 (ic_id_table[i].hci_bus != hci_bus))
171 continue;
172
173 break;
174 }
175 if (i >= ARRAY_SIZE(ic_id_table))
176 return NULL;
177
178 return &ic_id_table[i];
179}
180
181static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
182{
183 struct sk_buff *skb;
184
185 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
186 HCI_INIT_TIMEOUT);
187 if (IS_ERR(skb)) {
188 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)",
189 PTR_ERR(skb));
190 return skb;
191 }
192
193 if (skb->len != sizeof(struct hci_rp_read_local_version)) {
194 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch");
195 kfree_skb(skb);
196 return ERR_PTR(-EIO);
197 }
198
199 return skb;
200}
201
202static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
203{
204 struct rtl_rom_version_evt *rom_version;
205 struct sk_buff *skb;
206
207 /* Read RTL ROM version command */
208 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
209 if (IS_ERR(skb)) {
210 rtl_dev_err(hdev, "Read ROM version failed (%ld)",
211 PTR_ERR(skb));
212 return PTR_ERR(skb);
213 }
214
215 if (skb->len != sizeof(*rom_version)) {
216 rtl_dev_err(hdev, "version event length mismatch");
217 kfree_skb(skb);
218 return -EIO;
219 }
220
221 rom_version = (struct rtl_rom_version_evt *)skb->data;
222 rtl_dev_info(hdev, "rom_version status=%x version=%x",
223 rom_version->status, rom_version->version);
224
225 *version = rom_version->version;
226
227 kfree_skb(skb);
228 return 0;
229}
230
231static int rtlbt_parse_firmware(struct hci_dev *hdev,
232 struct btrtl_device_info *btrtl_dev,
233 unsigned char **_buf)
234{
235 static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
236 struct rtl_epatch_header *epatch_info;
237 unsigned char *buf;
238 int i, len;
239 size_t min_size;
240 u8 opcode, length, data;
241 int project_id = -1;
242 const unsigned char *fwptr, *chip_id_base;
243 const unsigned char *patch_length_base, *patch_offset_base;
244 u32 patch_offset = 0;
245 u16 patch_length, num_patches;
246 static const struct {
247 __u16 lmp_subver;
248 __u8 id;
249 } project_id_to_lmp_subver[] = {
250 { RTL_ROM_LMP_8723A, 0 },
251 { RTL_ROM_LMP_8723B, 1 },
252 { RTL_ROM_LMP_8821A, 2 },
253 { RTL_ROM_LMP_8761A, 3 },
254 { RTL_ROM_LMP_8822B, 8 },
255 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */
256 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */
257 { RTL_ROM_LMP_8822B, 13 }, /* 8822C */
258 };
259
260 min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3;
261 if (btrtl_dev->fw_len < min_size)
262 return -EINVAL;
263
264 fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
265 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
266 rtl_dev_err(hdev, "extension section signature mismatch");
267 return -EINVAL;
268 }
269
270 /* Loop from the end of the firmware parsing instructions, until
271 * we find an instruction that identifies the "project ID" for the
272 * hardware supported by this firwmare file.
273 * Once we have that, we double-check that that project_id is suitable
274 * for the hardware we are working with.
275 */
276 while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
277 opcode = *--fwptr;
278 length = *--fwptr;
279 data = *--fwptr;
280
281 BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
282
283 if (opcode == 0xff) /* EOF */
284 break;
285
286 if (length == 0) {
287 rtl_dev_err(hdev, "found instruction with length 0");
288 return -EINVAL;
289 }
290
291 if (opcode == 0 && length == 1) {
292 project_id = data;
293 break;
294 }
295
296 fwptr -= length;
297 }
298
299 if (project_id < 0) {
300 rtl_dev_err(hdev, "failed to find version instruction");
301 return -EINVAL;
302 }
303
304 /* Find project_id in table */
305 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
306 if (project_id == project_id_to_lmp_subver[i].id)
307 break;
308 }
309
310 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
311 rtl_dev_err(hdev, "unknown project id %d", project_id);
312 return -EINVAL;
313 }
314
315 if (btrtl_dev->ic_info->lmp_subver !=
316 project_id_to_lmp_subver[i].lmp_subver) {
317 rtl_dev_err(hdev, "firmware is for %x but this is a %x",
318 project_id_to_lmp_subver[i].lmp_subver,
319 btrtl_dev->ic_info->lmp_subver);
320 return -EINVAL;
321 }
322
323 epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
324 if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) {
325 rtl_dev_err(hdev, "bad EPATCH signature");
326 return -EINVAL;
327 }
328
329 num_patches = le16_to_cpu(epatch_info->num_patches);
330 BT_DBG("fw_version=%x, num_patches=%d",
331 le32_to_cpu(epatch_info->fw_version), num_patches);
332
333 /* After the rtl_epatch_header there is a funky patch metadata section.
334 * Assuming 2 patches, the layout is:
335 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
336 *
337 * Find the right patch for this chip.
338 */
339 min_size += 8 * num_patches;
340 if (btrtl_dev->fw_len < min_size)
341 return -EINVAL;
342
343 chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header);
344 patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
345 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
346 for (i = 0; i < num_patches; i++) {
347 u16 chip_id = get_unaligned_le16(chip_id_base +
348 (i * sizeof(u16)));
349 if (chip_id == btrtl_dev->rom_version + 1) {
350 patch_length = get_unaligned_le16(patch_length_base +
351 (i * sizeof(u16)));
352 patch_offset = get_unaligned_le32(patch_offset_base +
353 (i * sizeof(u32)));
354 break;
355 }
356 }
357
358 if (!patch_offset) {
359 rtl_dev_err(hdev, "didn't find patch for chip id %d",
360 btrtl_dev->rom_version);
361 return -EINVAL;
362 }
363
364 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
365 min_size = patch_offset + patch_length;
366 if (btrtl_dev->fw_len < min_size)
367 return -EINVAL;
368
369 /* Copy the firmware into a new buffer and write the version at
370 * the end.
371 */
372 len = patch_length;
373 buf = kmemdup(btrtl_dev->fw_data + patch_offset, patch_length,
374 GFP_KERNEL);
375 if (!buf)
376 return -ENOMEM;
377
378 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
379
380 *_buf = buf;
381 return len;
382}
383
384static int rtl_download_firmware(struct hci_dev *hdev,
385 const unsigned char *data, int fw_len)
386{
387 struct rtl_download_cmd *dl_cmd;
388 int frag_num = fw_len / RTL_FRAG_LEN + 1;
389 int frag_len = RTL_FRAG_LEN;
390 int ret = 0;
391 int i;
392 struct sk_buff *skb;
393 struct hci_rp_read_local_version *rp;
394
395 dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL);
396 if (!dl_cmd)
397 return -ENOMEM;
398
399 for (i = 0; i < frag_num; i++) {
400 struct sk_buff *skb;
401
402 BT_DBG("download fw (%d/%d)", i, frag_num);
403
404 if (i > 0x7f)
405 dl_cmd->index = (i & 0x7f) + 1;
406 else
407 dl_cmd->index = i;
408
409 if (i == (frag_num - 1)) {
410 dl_cmd->index |= 0x80; /* data end */
411 frag_len = fw_len % RTL_FRAG_LEN;
412 }
413 memcpy(dl_cmd->data, data, frag_len);
414
415 /* Send download command */
416 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
417 HCI_INIT_TIMEOUT);
418 if (IS_ERR(skb)) {
419 rtl_dev_err(hdev, "download fw command failed (%ld)",
420 PTR_ERR(skb));
421 ret = -PTR_ERR(skb);
422 goto out;
423 }
424
425 if (skb->len != sizeof(struct rtl_download_response)) {
426 rtl_dev_err(hdev, "download fw event length mismatch");
427 kfree_skb(skb);
428 ret = -EIO;
429 goto out;
430 }
431
432 kfree_skb(skb);
433 data += RTL_FRAG_LEN;
434 }
435
436 skb = btrtl_read_local_version(hdev);
437 if (IS_ERR(skb)) {
438 ret = PTR_ERR(skb);
439 rtl_dev_err(hdev, "read local version failed");
440 goto out;
441 }
442
443 rp = (struct hci_rp_read_local_version *)skb->data;
444 rtl_dev_info(hdev, "fw version 0x%04x%04x",
445 __le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver));
446 kfree_skb(skb);
447
448out:
449 kfree(dl_cmd);
450 return ret;
451}
452
453static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
454{
455 const struct firmware *fw;
456 int ret;
457
458 rtl_dev_info(hdev, "loading %s", name);
459 ret = request_firmware(&fw, name, &hdev->dev);
460 if (ret < 0)
461 return ret;
462 ret = fw->size;
463 *buff = kmemdup(fw->data, ret, GFP_KERNEL);
464 if (!*buff)
465 ret = -ENOMEM;
466
467 release_firmware(fw);
468
469 return ret;
470}
471
472static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
473 struct btrtl_device_info *btrtl_dev)
474{
475 if (btrtl_dev->fw_len < 8)
476 return -EINVAL;
477
478 /* Check that the firmware doesn't have the epatch signature
479 * (which is only for RTL8723B and newer).
480 */
481 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
482 rtl_dev_err(hdev, "unexpected EPATCH signature!");
483 return -EINVAL;
484 }
485
486 return rtl_download_firmware(hdev, btrtl_dev->fw_data,
487 btrtl_dev->fw_len);
488}
489
490static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
491 struct btrtl_device_info *btrtl_dev)
492{
493 unsigned char *fw_data = NULL;
494 int ret;
495 u8 *tbuff;
496
497 ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
498 if (ret < 0)
499 goto out;
500
501 if (btrtl_dev->cfg_len > 0) {
502 tbuff = kzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
503 if (!tbuff) {
504 ret = -ENOMEM;
505 goto out;
506 }
507
508 memcpy(tbuff, fw_data, ret);
509 kfree(fw_data);
510
511 memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
512 ret += btrtl_dev->cfg_len;
513
514 fw_data = tbuff;
515 }
516
517 rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret);
518
519 ret = rtl_download_firmware(hdev, fw_data, ret);
520
521out:
522 kfree(fw_data);
523 return ret;
524}
525
526void btrtl_free(struct btrtl_device_info *btrtl_dev)
527{
528 kfree(btrtl_dev->fw_data);
529 kfree(btrtl_dev->cfg_data);
530 kfree(btrtl_dev);
531}
532EXPORT_SYMBOL_GPL(btrtl_free);
533
534struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
535 const char *postfix)
536{
537 struct btrtl_device_info *btrtl_dev;
538 struct sk_buff *skb;
539 struct hci_rp_read_local_version *resp;
540 char cfg_name[40];
541 u16 hci_rev, lmp_subver;
542 u8 hci_ver;
543 int ret;
544
545 btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
546 if (!btrtl_dev) {
547 ret = -ENOMEM;
548 goto err_alloc;
549 }
550
551 skb = btrtl_read_local_version(hdev);
552 if (IS_ERR(skb)) {
553 ret = PTR_ERR(skb);
554 goto err_free;
555 }
556
557 resp = (struct hci_rp_read_local_version *)skb->data;
558 rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
559 resp->hci_ver, resp->hci_rev,
560 resp->lmp_ver, resp->lmp_subver);
561
562 hci_ver = resp->hci_ver;
563 hci_rev = le16_to_cpu(resp->hci_rev);
564 lmp_subver = le16_to_cpu(resp->lmp_subver);
565 kfree_skb(skb);
566
567 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
568 hdev->bus);
569
570 if (!btrtl_dev->ic_info) {
571 rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
572 lmp_subver, hci_rev, hci_ver);
573 return btrtl_dev;
574 }
575
576 if (btrtl_dev->ic_info->has_rom_version) {
577 ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version);
578 if (ret)
579 goto err_free;
580 }
581
582 btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name,
583 &btrtl_dev->fw_data);
584 if (btrtl_dev->fw_len < 0) {
585 rtl_dev_err(hdev, "firmware file %s not found",
586 btrtl_dev->ic_info->fw_name);
587 ret = btrtl_dev->fw_len;
588 goto err_free;
589 }
590
591 if (btrtl_dev->ic_info->cfg_name) {
592 if (postfix) {
593 snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin",
594 btrtl_dev->ic_info->cfg_name, postfix);
595 } else {
596 snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
597 btrtl_dev->ic_info->cfg_name);
598 }
599 btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
600 &btrtl_dev->cfg_data);
601 if (btrtl_dev->ic_info->config_needed &&
602 btrtl_dev->cfg_len <= 0) {
603 rtl_dev_err(hdev, "mandatory config file %s not found",
604 btrtl_dev->ic_info->cfg_name);
605 ret = btrtl_dev->cfg_len;
606 goto err_free;
607 }
608 }
609
610 return btrtl_dev;
611
612err_free:
613 btrtl_free(btrtl_dev);
614err_alloc:
615 return ERR_PTR(ret);
616}
617EXPORT_SYMBOL_GPL(btrtl_initialize);
618
619int btrtl_download_firmware(struct hci_dev *hdev,
620 struct btrtl_device_info *btrtl_dev)
621{
622 /* Match a set of subver values that correspond to stock firmware,
623 * which is not compatible with standard btusb.
624 * If matched, upload an alternative firmware that does conform to
625 * standard btusb. Once that firmware is uploaded, the subver changes
626 * to a different value.
627 */
628 if (!btrtl_dev->ic_info) {
629 rtl_dev_info(hdev, "assuming no firmware upload needed");
630 return 0;
631 }
632
633 switch (btrtl_dev->ic_info->lmp_subver) {
634 case RTL_ROM_LMP_8723A:
635 case RTL_ROM_LMP_3499:
636 return btrtl_setup_rtl8723a(hdev, btrtl_dev);
637 case RTL_ROM_LMP_8723B:
638 case RTL_ROM_LMP_8821A:
639 case RTL_ROM_LMP_8761A:
640 case RTL_ROM_LMP_8822B:
641 return btrtl_setup_rtl8723b(hdev, btrtl_dev);
642 default:
643 rtl_dev_info(hdev, "assuming no firmware upload needed");
644 return 0;
645 }
646}
647EXPORT_SYMBOL_GPL(btrtl_download_firmware);
648
649int btrtl_setup_realtek(struct hci_dev *hdev)
650{
651 struct btrtl_device_info *btrtl_dev;
652 int ret;
653
654 btrtl_dev = btrtl_initialize(hdev, NULL);
655 if (IS_ERR(btrtl_dev))
656 return PTR_ERR(btrtl_dev);
657
658 ret = btrtl_download_firmware(hdev, btrtl_dev);
659
660 btrtl_free(btrtl_dev);
661
662 /* Enable controller to do both LE scan and BR/EDR inquiry
663 * simultaneously.
664 */
665 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
666
667 return ret;
668}
669EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
670
671int btrtl_shutdown_realtek(struct hci_dev *hdev)
672{
673 struct sk_buff *skb;
674 int ret;
675
676 /* According to the vendor driver, BT must be reset on close to avoid
677 * firmware crash.
678 */
679 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
680 if (IS_ERR(skb)) {
681 ret = PTR_ERR(skb);
682 bt_dev_err(hdev, "HCI reset during shutdown failed");
683 return ret;
684 }
685 kfree_skb(skb);
686
687 return 0;
688}
689EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek);
690
691static unsigned int btrtl_convert_baudrate(u32 device_baudrate)
692{
693 switch (device_baudrate) {
694 case 0x0252a00a:
695 return 230400;
696
697 case 0x05f75004:
698 return 921600;
699
700 case 0x00005004:
701 return 1000000;
702
703 case 0x04928002:
704 case 0x01128002:
705 return 1500000;
706
707 case 0x00005002:
708 return 2000000;
709
710 case 0x0000b001:
711 return 2500000;
712
713 case 0x04928001:
714 return 3000000;
715
716 case 0x052a6001:
717 return 3500000;
718
719 case 0x00005001:
720 return 4000000;
721
722 case 0x0252c014:
723 default:
724 return 115200;
725 }
726}
727
728int btrtl_get_uart_settings(struct hci_dev *hdev,
729 struct btrtl_device_info *btrtl_dev,
730 unsigned int *controller_baudrate,
731 u32 *device_baudrate, bool *flow_control)
732{
733 struct rtl_vendor_config *config;
734 struct rtl_vendor_config_entry *entry;
735 int i, total_data_len;
736 bool found = false;
737
738 total_data_len = btrtl_dev->cfg_len - sizeof(*config);
739 if (total_data_len <= 0) {
740 rtl_dev_warn(hdev, "no config loaded");
741 return -EINVAL;
742 }
743
744 config = (struct rtl_vendor_config *)btrtl_dev->cfg_data;
745 if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) {
746 rtl_dev_err(hdev, "invalid config magic");
747 return -EINVAL;
748 }
749
750 if (total_data_len < le16_to_cpu(config->total_len)) {
751 rtl_dev_err(hdev, "config is too short");
752 return -EINVAL;
753 }
754
755 for (i = 0; i < total_data_len; ) {
756 entry = ((void *)config->entry) + i;
757
758 switch (le16_to_cpu(entry->offset)) {
759 case 0xc:
760 if (entry->len < sizeof(*device_baudrate)) {
761 rtl_dev_err(hdev, "invalid UART config entry");
762 return -EINVAL;
763 }
764
765 *device_baudrate = get_unaligned_le32(entry->data);
766 *controller_baudrate = btrtl_convert_baudrate(
767 *device_baudrate);
768
769 if (entry->len >= 13)
770 *flow_control = !!(entry->data[12] & BIT(2));
771 else
772 *flow_control = false;
773
774 found = true;
775 break;
776
777 default:
778 rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)",
779 le16_to_cpu(entry->offset), entry->len);
780 break;
781 };
782
783 i += sizeof(*entry) + entry->len;
784 }
785
786 if (!found) {
787 rtl_dev_err(hdev, "no UART config entry found");
788 return -ENOENT;
789 }
790
791 rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate);
792 rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate);
793 rtl_dev_dbg(hdev, "flow control %d", *flow_control);
794
795 return 0;
796}
797EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
798
799MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
800MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
801MODULE_VERSION(VERSION);
802MODULE_LICENSE("GPL");
803MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
804MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
805MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
806MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
807MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
808MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
809MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
810MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
811MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
812MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
813MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
814MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
815MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");