1 | /* |
2 | * Bluetooth support for Realtek devices |
3 | * |
4 | * Copyright (C) 2015 Endless Mobile, Inc. |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | */ |
17 | |
18 | #include <linux/module.h> |
19 | #include <linux/firmware.h> |
20 | #include <asm/unaligned.h> |
21 | #include <linux/usb.h> |
22 | |
23 | #include <net/bluetooth/bluetooth.h> |
24 | #include <net/bluetooth/hci_core.h> |
25 | |
26 | #include "btrtl.h" |
27 | |
28 | #define VERSION "0.1" |
29 | |
30 | #define RTL_EPATCH_SIGNATURE "Realtech" |
31 | #define RTL_ROM_LMP_3499 0x3499 |
32 | #define RTL_ROM_LMP_8723A 0x1200 |
33 | #define RTL_ROM_LMP_8723B 0x8723 |
34 | #define RTL_ROM_LMP_8821A 0x8821 |
35 | #define RTL_ROM_LMP_8761A 0x8761 |
36 | #define RTL_ROM_LMP_8822B 0x8822 |
37 | #define RTL_CONFIG_MAGIC 0x8723ab55 |
38 | |
39 | #define IC_MATCH_FL_LMPSUBV (1 << 0) |
40 | #define IC_MATCH_FL_HCIREV (1 << 1) |
41 | #define IC_MATCH_FL_HCIVER (1 << 2) |
42 | #define IC_MATCH_FL_HCIBUS (1 << 3) |
43 | #define IC_INFO(lmps, hcir) \ |
44 | .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV, \ |
45 | .lmp_subver = (lmps), \ |
46 | .hci_rev = (hcir) |
47 | |
48 | struct id_table { |
49 | __u16 match_flags; |
50 | __u16 lmp_subver; |
51 | __u16 hci_rev; |
52 | __u8 hci_ver; |
53 | __u8 hci_bus; |
54 | bool config_needed; |
55 | bool has_rom_version; |
56 | char *fw_name; |
57 | char *cfg_name; |
58 | }; |
59 | |
60 | struct btrtl_device_info { |
61 | const struct id_table *ic_info; |
62 | u8 rom_version; |
63 | u8 *fw_data; |
64 | int fw_len; |
65 | u8 *cfg_data; |
66 | int cfg_len; |
67 | }; |
68 | |
69 | static const struct id_table ic_id_table[] = { |
70 | { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8723A, 0x0, |
71 | .config_needed = false, |
72 | .has_rom_version = false, |
73 | .fw_name = "rtl_bt/rtl8723a_fw.bin" , |
74 | .cfg_name = NULL }, |
75 | |
76 | { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_3499, 0x0, |
77 | .config_needed = false, |
78 | .has_rom_version = false, |
79 | .fw_name = "rtl_bt/rtl8723a_fw.bin" , |
80 | .cfg_name = NULL }, |
81 | |
82 | /* 8723BS */ |
83 | { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | |
84 | IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, |
85 | .lmp_subver = RTL_ROM_LMP_8723B, |
86 | .hci_rev = 0xb, |
87 | .hci_ver = 6, |
88 | .hci_bus = HCI_UART, |
89 | .config_needed = true, |
90 | .has_rom_version = true, |
91 | .fw_name = "rtl_bt/rtl8723bs_fw.bin" , |
92 | .cfg_name = "rtl_bt/rtl8723bs_config" }, |
93 | |
94 | /* 8723B */ |
95 | { IC_INFO(RTL_ROM_LMP_8723B, 0xb), |
96 | .config_needed = false, |
97 | .has_rom_version = true, |
98 | .fw_name = "rtl_bt/rtl8723b_fw.bin" , |
99 | .cfg_name = "rtl_bt/rtl8723b_config" }, |
100 | |
101 | /* 8723D */ |
102 | { IC_INFO(RTL_ROM_LMP_8723B, 0xd), |
103 | .config_needed = true, |
104 | .has_rom_version = true, |
105 | .fw_name = "rtl_bt/rtl8723d_fw.bin" , |
106 | .cfg_name = "rtl_bt/rtl8723d_config" }, |
107 | |
108 | /* 8723DS */ |
109 | { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | |
110 | IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, |
111 | .lmp_subver = RTL_ROM_LMP_8723B, |
112 | .hci_rev = 0xd, |
113 | .hci_ver = 8, |
114 | .hci_bus = HCI_UART, |
115 | .config_needed = true, |
116 | .has_rom_version = true, |
117 | .fw_name = "rtl_bt/rtl8723ds_fw.bin" , |
118 | .cfg_name = "rtl_bt/rtl8723ds_config" }, |
119 | |
120 | /* 8821A */ |
121 | { IC_INFO(RTL_ROM_LMP_8821A, 0xa), |
122 | .config_needed = false, |
123 | .has_rom_version = true, |
124 | .fw_name = "rtl_bt/rtl8821a_fw.bin" , |
125 | .cfg_name = "rtl_bt/rtl8821a_config" }, |
126 | |
127 | /* 8821C */ |
128 | { IC_INFO(RTL_ROM_LMP_8821A, 0xc), |
129 | .config_needed = false, |
130 | .has_rom_version = true, |
131 | .fw_name = "rtl_bt/rtl8821c_fw.bin" , |
132 | .cfg_name = "rtl_bt/rtl8821c_config" }, |
133 | |
134 | /* 8761A */ |
135 | { IC_MATCH_FL_LMPSUBV, RTL_ROM_LMP_8761A, 0x0, |
136 | .config_needed = false, |
137 | .has_rom_version = true, |
138 | .fw_name = "rtl_bt/rtl8761a_fw.bin" , |
139 | .cfg_name = "rtl_bt/rtl8761a_config" }, |
140 | |
141 | /* 8822C with USB interface */ |
142 | { IC_INFO(RTL_ROM_LMP_8822B, 0xc), |
143 | .config_needed = false, |
144 | .has_rom_version = true, |
145 | .fw_name = "rtl_bt/rtl8822cu_fw.bin" , |
146 | .cfg_name = "rtl_bt/rtl8822cu_config" }, |
147 | |
148 | /* 8822B */ |
149 | { IC_INFO(RTL_ROM_LMP_8822B, 0xb), |
150 | .config_needed = true, |
151 | .has_rom_version = true, |
152 | .fw_name = "rtl_bt/rtl8822b_fw.bin" , |
153 | .cfg_name = "rtl_bt/rtl8822b_config" }, |
154 | }; |
155 | |
156 | static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev, |
157 | u8 hci_ver, u8 hci_bus) |
158 | { |
159 | int i; |
160 | |
161 | for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) { |
162 | if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) && |
163 | (ic_id_table[i].lmp_subver != lmp_subver)) |
164 | continue; |
165 | if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) && |
166 | (ic_id_table[i].hci_rev != hci_rev)) |
167 | continue; |
168 | if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) && |
169 | (ic_id_table[i].hci_ver != hci_ver)) |
170 | continue; |
171 | if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) && |
172 | (ic_id_table[i].hci_bus != hci_bus)) |
173 | continue; |
174 | |
175 | break; |
176 | } |
177 | if (i >= ARRAY_SIZE(ic_id_table)) |
178 | return NULL; |
179 | |
180 | return &ic_id_table[i]; |
181 | } |
182 | |
183 | static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version) |
184 | { |
185 | struct rtl_rom_version_evt *rom_version; |
186 | struct sk_buff *skb; |
187 | |
188 | /* Read RTL ROM version command */ |
189 | skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT); |
190 | if (IS_ERR(skb)) { |
191 | rtl_dev_err(hdev, "Read ROM version failed (%ld)\n" , |
192 | PTR_ERR(skb)); |
193 | return PTR_ERR(skb); |
194 | } |
195 | |
196 | if (skb->len != sizeof(*rom_version)) { |
197 | rtl_dev_err(hdev, "RTL version event length mismatch\n" ); |
198 | kfree_skb(skb); |
199 | return -EIO; |
200 | } |
201 | |
202 | rom_version = (struct rtl_rom_version_evt *)skb->data; |
203 | rtl_dev_info(hdev, "rom_version status=%x version=%x\n" , |
204 | rom_version->status, rom_version->version); |
205 | |
206 | *version = rom_version->version; |
207 | |
208 | kfree_skb(skb); |
209 | return 0; |
210 | } |
211 | |
212 | static int rtlbt_parse_firmware(struct hci_dev *hdev, |
213 | struct btrtl_device_info *btrtl_dev, |
214 | unsigned char **_buf) |
215 | { |
216 | static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 }; |
217 | struct rtl_epatch_header *epatch_info; |
218 | unsigned char *buf; |
219 | int i, len; |
220 | size_t min_size; |
221 | u8 opcode, length, data; |
222 | int project_id = -1; |
223 | const unsigned char *fwptr, *chip_id_base; |
224 | const unsigned char *patch_length_base, *patch_offset_base; |
225 | u32 patch_offset = 0; |
226 | u16 patch_length, num_patches; |
227 | static const struct { |
228 | __u16 lmp_subver; |
229 | __u8 id; |
230 | } project_id_to_lmp_subver[] = { |
231 | { RTL_ROM_LMP_8723A, 0 }, |
232 | { RTL_ROM_LMP_8723B, 1 }, |
233 | { RTL_ROM_LMP_8821A, 2 }, |
234 | { RTL_ROM_LMP_8761A, 3 }, |
235 | { RTL_ROM_LMP_8822B, 8 }, |
236 | { RTL_ROM_LMP_8723B, 9 }, /* 8723D */ |
237 | { RTL_ROM_LMP_8821A, 10 }, /* 8821C */ |
238 | { RTL_ROM_LMP_8822B, 13 }, /* 8822C */ |
239 | }; |
240 | |
241 | min_size = sizeof(struct rtl_epatch_header) + sizeof(extension_sig) + 3; |
242 | if (btrtl_dev->fw_len < min_size) |
243 | return -EINVAL; |
244 | |
245 | fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig); |
246 | if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) { |
247 | rtl_dev_err(hdev, "extension section signature mismatch\n" ); |
248 | return -EINVAL; |
249 | } |
250 | |
251 | /* Loop from the end of the firmware parsing instructions, until |
252 | * we find an instruction that identifies the "project ID" for the |
253 | * hardware supported by this firwmare file. |
254 | * Once we have that, we double-check that that project_id is suitable |
255 | * for the hardware we are working with. |
256 | */ |
257 | while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) { |
258 | opcode = *--fwptr; |
259 | length = *--fwptr; |
260 | data = *--fwptr; |
261 | |
262 | BT_DBG("check op=%x len=%x data=%x" , opcode, length, data); |
263 | |
264 | if (opcode == 0xff) /* EOF */ |
265 | break; |
266 | |
267 | if (length == 0) { |
268 | rtl_dev_err(hdev, "found instruction with length 0\n" ); |
269 | return -EINVAL; |
270 | } |
271 | |
272 | if (opcode == 0 && length == 1) { |
273 | project_id = data; |
274 | break; |
275 | } |
276 | |
277 | fwptr -= length; |
278 | } |
279 | |
280 | if (project_id < 0) { |
281 | rtl_dev_err(hdev, "failed to find version instruction\n" ); |
282 | return -EINVAL; |
283 | } |
284 | |
285 | /* Find project_id in table */ |
286 | for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) { |
287 | if (project_id == project_id_to_lmp_subver[i].id) |
288 | break; |
289 | } |
290 | |
291 | if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) { |
292 | rtl_dev_err(hdev, "unknown project id %d\n" , project_id); |
293 | return -EINVAL; |
294 | } |
295 | |
296 | if (btrtl_dev->ic_info->lmp_subver != |
297 | project_id_to_lmp_subver[i].lmp_subver) { |
298 | rtl_dev_err(hdev, "firmware is for %x but this is a %x\n" , |
299 | project_id_to_lmp_subver[i].lmp_subver, |
300 | btrtl_dev->ic_info->lmp_subver); |
301 | return -EINVAL; |
302 | } |
303 | |
304 | epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data; |
305 | if (memcmp(epatch_info->signature, RTL_EPATCH_SIGNATURE, 8) != 0) { |
306 | rtl_dev_err(hdev, "bad EPATCH signature\n" ); |
307 | return -EINVAL; |
308 | } |
309 | |
310 | num_patches = le16_to_cpu(epatch_info->num_patches); |
311 | BT_DBG("fw_version=%x, num_patches=%d" , |
312 | le32_to_cpu(epatch_info->fw_version), num_patches); |
313 | |
314 | /* After the rtl_epatch_header there is a funky patch metadata section. |
315 | * Assuming 2 patches, the layout is: |
316 | * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2 |
317 | * |
318 | * Find the right patch for this chip. |
319 | */ |
320 | min_size += 8 * num_patches; |
321 | if (btrtl_dev->fw_len < min_size) |
322 | return -EINVAL; |
323 | |
324 | chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header); |
325 | patch_length_base = chip_id_base + (sizeof(u16) * num_patches); |
326 | patch_offset_base = patch_length_base + (sizeof(u16) * num_patches); |
327 | for (i = 0; i < num_patches; i++) { |
328 | u16 chip_id = get_unaligned_le16(chip_id_base + |
329 | (i * sizeof(u16))); |
330 | if (chip_id == btrtl_dev->rom_version + 1) { |
331 | patch_length = get_unaligned_le16(patch_length_base + |
332 | (i * sizeof(u16))); |
333 | patch_offset = get_unaligned_le32(patch_offset_base + |
334 | (i * sizeof(u32))); |
335 | break; |
336 | } |
337 | } |
338 | |
339 | if (!patch_offset) { |
340 | rtl_dev_err(hdev, "didn't find patch for chip id %d" , |
341 | btrtl_dev->rom_version); |
342 | return -EINVAL; |
343 | } |
344 | |
345 | BT_DBG("length=%x offset=%x index %d" , patch_length, patch_offset, i); |
346 | min_size = patch_offset + patch_length; |
347 | if (btrtl_dev->fw_len < min_size) |
348 | return -EINVAL; |
349 | |
350 | /* Copy the firmware into a new buffer and write the version at |
351 | * the end. |
352 | */ |
353 | len = patch_length; |
354 | buf = kmemdup(btrtl_dev->fw_data + patch_offset, patch_length, |
355 | GFP_KERNEL); |
356 | if (!buf) |
357 | return -ENOMEM; |
358 | |
359 | memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4); |
360 | |
361 | *_buf = buf; |
362 | return len; |
363 | } |
364 | |
365 | static int rtl_download_firmware(struct hci_dev *hdev, |
366 | const unsigned char *data, int fw_len) |
367 | { |
368 | struct rtl_download_cmd *dl_cmd; |
369 | int frag_num = fw_len / RTL_FRAG_LEN + 1; |
370 | int frag_len = RTL_FRAG_LEN; |
371 | int ret = 0; |
372 | int i; |
373 | |
374 | dl_cmd = kmalloc(sizeof(struct rtl_download_cmd), GFP_KERNEL); |
375 | if (!dl_cmd) |
376 | return -ENOMEM; |
377 | |
378 | for (i = 0; i < frag_num; i++) { |
379 | struct sk_buff *skb; |
380 | |
381 | BT_DBG("download fw (%d/%d)" , i, frag_num); |
382 | |
383 | dl_cmd->index = i; |
384 | if (i == (frag_num - 1)) { |
385 | dl_cmd->index |= 0x80; /* data end */ |
386 | frag_len = fw_len % RTL_FRAG_LEN; |
387 | } |
388 | memcpy(dl_cmd->data, data, frag_len); |
389 | |
390 | /* Send download command */ |
391 | skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd, |
392 | HCI_INIT_TIMEOUT); |
393 | if (IS_ERR(skb)) { |
394 | rtl_dev_err(hdev, "download fw command failed (%ld)\n" , |
395 | PTR_ERR(skb)); |
396 | ret = -PTR_ERR(skb); |
397 | goto out; |
398 | } |
399 | |
400 | if (skb->len != sizeof(struct rtl_download_response)) { |
401 | rtl_dev_err(hdev, "download fw event length mismatch\n" ); |
402 | kfree_skb(skb); |
403 | ret = -EIO; |
404 | goto out; |
405 | } |
406 | |
407 | kfree_skb(skb); |
408 | data += RTL_FRAG_LEN; |
409 | } |
410 | |
411 | out: |
412 | kfree(dl_cmd); |
413 | return ret; |
414 | } |
415 | |
416 | static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff) |
417 | { |
418 | const struct firmware *fw; |
419 | int ret; |
420 | |
421 | rtl_dev_info(hdev, "rtl: loading %s\n" , name); |
422 | ret = request_firmware(&fw, name, &hdev->dev); |
423 | if (ret < 0) |
424 | return ret; |
425 | ret = fw->size; |
426 | *buff = kmemdup(fw->data, ret, GFP_KERNEL); |
427 | if (!*buff) |
428 | ret = -ENOMEM; |
429 | |
430 | release_firmware(fw); |
431 | |
432 | return ret; |
433 | } |
434 | |
435 | static int btrtl_setup_rtl8723a(struct hci_dev *hdev, |
436 | struct btrtl_device_info *btrtl_dev) |
437 | { |
438 | if (btrtl_dev->fw_len < 8) |
439 | return -EINVAL; |
440 | |
441 | /* Check that the firmware doesn't have the epatch signature |
442 | * (which is only for RTL8723B and newer). |
443 | */ |
444 | if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) { |
445 | rtl_dev_err(hdev, "unexpected EPATCH signature!\n" ); |
446 | return -EINVAL; |
447 | } |
448 | |
449 | return rtl_download_firmware(hdev, btrtl_dev->fw_data, |
450 | btrtl_dev->fw_len); |
451 | } |
452 | |
453 | static int btrtl_setup_rtl8723b(struct hci_dev *hdev, |
454 | struct btrtl_device_info *btrtl_dev) |
455 | { |
456 | unsigned char *fw_data = NULL; |
457 | int ret; |
458 | u8 *tbuff; |
459 | |
460 | ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data); |
461 | if (ret < 0) |
462 | goto out; |
463 | |
464 | if (btrtl_dev->cfg_len > 0) { |
465 | tbuff = kzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL); |
466 | if (!tbuff) { |
467 | ret = -ENOMEM; |
468 | goto out; |
469 | } |
470 | |
471 | memcpy(tbuff, fw_data, ret); |
472 | kfree(fw_data); |
473 | |
474 | memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len); |
475 | ret += btrtl_dev->cfg_len; |
476 | |
477 | fw_data = tbuff; |
478 | } |
479 | |
480 | rtl_dev_info(hdev, "cfg_sz %d, total sz %d\n" , btrtl_dev->cfg_len, ret); |
481 | |
482 | ret = rtl_download_firmware(hdev, fw_data, ret); |
483 | |
484 | out: |
485 | kfree(fw_data); |
486 | return ret; |
487 | } |
488 | |
489 | static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev) |
490 | { |
491 | struct sk_buff *skb; |
492 | |
493 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, |
494 | HCI_INIT_TIMEOUT); |
495 | if (IS_ERR(skb)) { |
496 | rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)\n" , |
497 | PTR_ERR(skb)); |
498 | return skb; |
499 | } |
500 | |
501 | if (skb->len != sizeof(struct hci_rp_read_local_version)) { |
502 | rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch\n" ); |
503 | kfree_skb(skb); |
504 | return ERR_PTR(-EIO); |
505 | } |
506 | |
507 | return skb; |
508 | } |
509 | |
510 | void btrtl_free(struct btrtl_device_info *btrtl_dev) |
511 | { |
512 | kfree(btrtl_dev->fw_data); |
513 | kfree(btrtl_dev->cfg_data); |
514 | kfree(btrtl_dev); |
515 | } |
516 | EXPORT_SYMBOL_GPL(btrtl_free); |
517 | |
518 | struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, |
519 | const char *postfix) |
520 | { |
521 | struct btrtl_device_info *btrtl_dev; |
522 | struct sk_buff *skb; |
523 | struct hci_rp_read_local_version *resp; |
524 | char cfg_name[40]; |
525 | u16 hci_rev, lmp_subver; |
526 | u8 hci_ver; |
527 | int ret; |
528 | |
529 | btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL); |
530 | if (!btrtl_dev) { |
531 | ret = -ENOMEM; |
532 | goto err_alloc; |
533 | } |
534 | |
535 | skb = btrtl_read_local_version(hdev); |
536 | if (IS_ERR(skb)) { |
537 | ret = PTR_ERR(skb); |
538 | goto err_free; |
539 | } |
540 | |
541 | resp = (struct hci_rp_read_local_version *)skb->data; |
542 | rtl_dev_info(hdev, "rtl: examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x\n" , |
543 | resp->hci_ver, resp->hci_rev, |
544 | resp->lmp_ver, resp->lmp_subver); |
545 | |
546 | hci_ver = resp->hci_ver; |
547 | hci_rev = le16_to_cpu(resp->hci_rev); |
548 | lmp_subver = le16_to_cpu(resp->lmp_subver); |
549 | kfree_skb(skb); |
550 | |
551 | btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver, |
552 | hdev->bus); |
553 | |
554 | if (!btrtl_dev->ic_info) { |
555 | rtl_dev_info(hdev, "rtl: unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x" , |
556 | lmp_subver, hci_rev, hci_ver); |
557 | return btrtl_dev; |
558 | } |
559 | |
560 | if (btrtl_dev->ic_info->has_rom_version) { |
561 | ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version); |
562 | if (ret) |
563 | goto err_free; |
564 | } |
565 | |
566 | btrtl_dev->fw_len = rtl_load_file(hdev, btrtl_dev->ic_info->fw_name, |
567 | &btrtl_dev->fw_data); |
568 | if (btrtl_dev->fw_len < 0) { |
569 | rtl_dev_err(hdev, "firmware file %s not found\n" , |
570 | btrtl_dev->ic_info->fw_name); |
571 | ret = btrtl_dev->fw_len; |
572 | goto err_free; |
573 | } |
574 | |
575 | if (btrtl_dev->ic_info->cfg_name) { |
576 | if (postfix) { |
577 | snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin" , |
578 | btrtl_dev->ic_info->cfg_name, postfix); |
579 | } else { |
580 | snprintf(cfg_name, sizeof(cfg_name), "%s.bin" , |
581 | btrtl_dev->ic_info->cfg_name); |
582 | } |
583 | btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name, |
584 | &btrtl_dev->cfg_data); |
585 | if (btrtl_dev->ic_info->config_needed && |
586 | btrtl_dev->cfg_len <= 0) { |
587 | rtl_dev_err(hdev, "mandatory config file %s not found\n" , |
588 | btrtl_dev->ic_info->cfg_name); |
589 | ret = btrtl_dev->cfg_len; |
590 | goto err_free; |
591 | } |
592 | } |
593 | |
594 | return btrtl_dev; |
595 | |
596 | err_free: |
597 | btrtl_free(btrtl_dev); |
598 | err_alloc: |
599 | return ERR_PTR(ret); |
600 | } |
601 | EXPORT_SYMBOL_GPL(btrtl_initialize); |
602 | |
603 | int btrtl_download_firmware(struct hci_dev *hdev, |
604 | struct btrtl_device_info *btrtl_dev) |
605 | { |
606 | /* Match a set of subver values that correspond to stock firmware, |
607 | * which is not compatible with standard btusb. |
608 | * If matched, upload an alternative firmware that does conform to |
609 | * standard btusb. Once that firmware is uploaded, the subver changes |
610 | * to a different value. |
611 | */ |
612 | if (!btrtl_dev->ic_info) { |
613 | rtl_dev_info(hdev, "rtl: assuming no firmware upload needed\n" ); |
614 | return 0; |
615 | } |
616 | |
617 | switch (btrtl_dev->ic_info->lmp_subver) { |
618 | case RTL_ROM_LMP_8723A: |
619 | case RTL_ROM_LMP_3499: |
620 | return btrtl_setup_rtl8723a(hdev, btrtl_dev); |
621 | case RTL_ROM_LMP_8723B: |
622 | case RTL_ROM_LMP_8821A: |
623 | case RTL_ROM_LMP_8761A: |
624 | case RTL_ROM_LMP_8822B: |
625 | return btrtl_setup_rtl8723b(hdev, btrtl_dev); |
626 | default: |
627 | rtl_dev_info(hdev, "rtl: assuming no firmware upload needed\n" ); |
628 | return 0; |
629 | } |
630 | } |
631 | EXPORT_SYMBOL_GPL(btrtl_download_firmware); |
632 | |
633 | int btrtl_setup_realtek(struct hci_dev *hdev) |
634 | { |
635 | struct btrtl_device_info *btrtl_dev; |
636 | int ret; |
637 | |
638 | btrtl_dev = btrtl_initialize(hdev, NULL); |
639 | if (IS_ERR(btrtl_dev)) |
640 | return PTR_ERR(btrtl_dev); |
641 | |
642 | ret = btrtl_download_firmware(hdev, btrtl_dev); |
643 | |
644 | btrtl_free(btrtl_dev); |
645 | |
646 | return ret; |
647 | } |
648 | EXPORT_SYMBOL_GPL(btrtl_setup_realtek); |
649 | |
650 | static unsigned int btrtl_convert_baudrate(u32 device_baudrate) |
651 | { |
652 | switch (device_baudrate) { |
653 | case 0x0252a00a: |
654 | return 230400; |
655 | |
656 | case 0x05f75004: |
657 | return 921600; |
658 | |
659 | case 0x00005004: |
660 | return 1000000; |
661 | |
662 | case 0x04928002: |
663 | case 0x01128002: |
664 | return 1500000; |
665 | |
666 | case 0x00005002: |
667 | return 2000000; |
668 | |
669 | case 0x0000b001: |
670 | return 2500000; |
671 | |
672 | case 0x04928001: |
673 | return 3000000; |
674 | |
675 | case 0x052a6001: |
676 | return 3500000; |
677 | |
678 | case 0x00005001: |
679 | return 4000000; |
680 | |
681 | case 0x0252c014: |
682 | default: |
683 | return 115200; |
684 | } |
685 | } |
686 | |
687 | int btrtl_get_uart_settings(struct hci_dev *hdev, |
688 | struct btrtl_device_info *btrtl_dev, |
689 | unsigned int *controller_baudrate, |
690 | u32 *device_baudrate, bool *flow_control) |
691 | { |
692 | struct rtl_vendor_config *config; |
693 | struct rtl_vendor_config_entry *entry; |
694 | int i, total_data_len; |
695 | bool found = false; |
696 | |
697 | total_data_len = btrtl_dev->cfg_len - sizeof(*config); |
698 | if (total_data_len <= 0) { |
699 | rtl_dev_warn(hdev, "no config loaded\n" ); |
700 | return -EINVAL; |
701 | } |
702 | |
703 | config = (struct rtl_vendor_config *)btrtl_dev->cfg_data; |
704 | if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) { |
705 | rtl_dev_err(hdev, "invalid config magic\n" ); |
706 | return -EINVAL; |
707 | } |
708 | |
709 | if (total_data_len < le16_to_cpu(config->total_len)) { |
710 | rtl_dev_err(hdev, "config is too short\n" ); |
711 | return -EINVAL; |
712 | } |
713 | |
714 | for (i = 0; i < total_data_len; ) { |
715 | entry = ((void *)config->entry) + i; |
716 | |
717 | switch (le16_to_cpu(entry->offset)) { |
718 | case 0xc: |
719 | if (entry->len < sizeof(*device_baudrate)) { |
720 | rtl_dev_err(hdev, "invalid UART config entry\n" ); |
721 | return -EINVAL; |
722 | } |
723 | |
724 | *device_baudrate = get_unaligned_le32(entry->data); |
725 | *controller_baudrate = btrtl_convert_baudrate( |
726 | *device_baudrate); |
727 | |
728 | if (entry->len >= 13) |
729 | *flow_control = !!(entry->data[12] & BIT(2)); |
730 | else |
731 | *flow_control = false; |
732 | |
733 | found = true; |
734 | break; |
735 | |
736 | default: |
737 | rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)\n" , |
738 | le16_to_cpu(entry->offset), entry->len); |
739 | break; |
740 | }; |
741 | |
742 | i += sizeof(*entry) + entry->len; |
743 | } |
744 | |
745 | if (!found) { |
746 | rtl_dev_err(hdev, "no UART config entry found\n" ); |
747 | return -ENOENT; |
748 | } |
749 | |
750 | rtl_dev_dbg(hdev, "device baudrate = 0x%08x\n" , *device_baudrate); |
751 | rtl_dev_dbg(hdev, "controller baudrate = %u\n" , *controller_baudrate); |
752 | rtl_dev_dbg(hdev, "flow control %d\n" , *flow_control); |
753 | |
754 | return 0; |
755 | } |
756 | EXPORT_SYMBOL_GPL(btrtl_get_uart_settings); |
757 | |
758 | MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>" ); |
759 | MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION); |
760 | MODULE_VERSION(VERSION); |
761 | MODULE_LICENSE("GPL" ); |
762 | MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin" ); |
763 | MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin" ); |
764 | MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin" ); |
765 | MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin" ); |
766 | MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin" ); |
767 | MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin" ); |
768 | MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin" ); |
769 | MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin" ); |
770 | MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin" ); |
771 | MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin" ); |
772 | MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin" ); |
773 | MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin" ); |
774 | MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin" ); |
775 | |