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 <linux/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_ROM_LMP_8922A 0x8922
34 #define RTL_CONFIG_MAGIC 0x8723ab55
35
36 #define RTL_VSC_OP_COREDUMP 0xfcff
37
38 #define IC_MATCH_FL_LMPSUBV (1 << 0)
39 #define IC_MATCH_FL_HCIREV (1 << 1)
40 #define IC_MATCH_FL_HCIVER (1 << 2)
41 #define IC_MATCH_FL_HCIBUS (1 << 3)
42 #define IC_MATCH_FL_CHIP_TYPE (1 << 4)
43 #define IC_INFO(lmps, hcir, hciv, bus) \
44 .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_HCIREV | \
45 IC_MATCH_FL_HCIVER | IC_MATCH_FL_HCIBUS, \
46 .lmp_subver = (lmps), \
47 .hci_rev = (hcir), \
48 .hci_ver = (hciv), \
49 .hci_bus = (bus)
50
51 #define RTL_CHIP_SUBVER (&(struct rtl_vendor_cmd) {{0x10, 0x38, 0x04, 0x28, 0x80}})
52 #define RTL_CHIP_REV (&(struct rtl_vendor_cmd) {{0x10, 0x3A, 0x04, 0x28, 0x80}})
53 #define RTL_SEC_PROJ (&(struct rtl_vendor_cmd) {{0x10, 0xA4, 0x0D, 0x00, 0xb0}})
54
55 #define RTL_PATCH_SNIPPETS 0x01
56 #define RTL_PATCH_DUMMY_HEADER 0x02
57 #define RTL_PATCH_SECURITY_HEADER 0x03
58
59 enum btrtl_chip_id {
60 CHIP_ID_8723A,
61 CHIP_ID_8723B,
62 CHIP_ID_8821A,
63 CHIP_ID_8761A,
64 CHIP_ID_8822B = 8,
65 CHIP_ID_8723D,
66 CHIP_ID_8821C,
67 CHIP_ID_8822C = 13,
68 CHIP_ID_8761B,
69 CHIP_ID_8852A = 18,
70 CHIP_ID_8852B = 20,
71 CHIP_ID_8852C = 25,
72 CHIP_ID_8851B = 36,
73 CHIP_ID_8922A = 44,
74 CHIP_ID_8852BT = 47,
75 };
76
77 struct id_table {
78 __u16 match_flags;
79 __u16 lmp_subver;
80 __u16 hci_rev;
81 __u8 hci_ver;
82 __u8 hci_bus;
83 __u8 chip_type;
84 bool config_needed;
85 bool has_rom_version;
86 bool has_msft_ext;
87 char *fw_name;
88 char *cfg_name;
89 char *hw_info;
90 };
91
92 struct btrtl_device_info {
93 const struct id_table *ic_info;
94 u8 rom_version;
95 u8 *fw_data;
96 int fw_len;
97 u8 *cfg_data;
98 int cfg_len;
99 bool drop_fw;
100 int project_id;
101 u8 key_id;
102 struct list_head patch_subsecs;
103 };
104
105 static const struct id_table ic_id_table[] = {
106 /* 8723A */
107 { IC_INFO(RTL_ROM_LMP_8723A, 0xb, 0x6, HCI_USB),
108 .config_needed = false,
109 .has_rom_version = false,
110 .fw_name = "rtl_bt/rtl8723a_fw",
111 .cfg_name = NULL,
112 .hw_info = "rtl8723au" },
113
114 /* 8723BS */
115 { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
116 .config_needed = true,
117 .has_rom_version = true,
118 .fw_name = "rtl_bt/rtl8723bs_fw",
119 .cfg_name = "rtl_bt/rtl8723bs_config",
120 .hw_info = "rtl8723bs" },
121
122 /* 8723B */
123 { IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
124 .config_needed = false,
125 .has_rom_version = true,
126 .fw_name = "rtl_bt/rtl8723b_fw",
127 .cfg_name = "rtl_bt/rtl8723b_config",
128 .hw_info = "rtl8723bu" },
129
130 /* 8723CS-CG */
131 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
132 IC_MATCH_FL_HCIBUS,
133 .lmp_subver = RTL_ROM_LMP_8703B,
134 .chip_type = RTL_CHIP_8723CS_CG,
135 .hci_bus = HCI_UART,
136 .config_needed = true,
137 .has_rom_version = true,
138 .fw_name = "rtl_bt/rtl8723cs_cg_fw",
139 .cfg_name = "rtl_bt/rtl8723cs_cg_config",
140 .hw_info = "rtl8723cs-cg" },
141
142 /* 8723CS-VF */
143 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
144 IC_MATCH_FL_HCIBUS,
145 .lmp_subver = RTL_ROM_LMP_8703B,
146 .chip_type = RTL_CHIP_8723CS_VF,
147 .hci_bus = HCI_UART,
148 .config_needed = true,
149 .has_rom_version = true,
150 .fw_name = "rtl_bt/rtl8723cs_vf_fw",
151 .cfg_name = "rtl_bt/rtl8723cs_vf_config",
152 .hw_info = "rtl8723cs-vf" },
153
154 /* 8723CS-XX */
155 { .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
156 IC_MATCH_FL_HCIBUS,
157 .lmp_subver = RTL_ROM_LMP_8703B,
158 .chip_type = RTL_CHIP_8723CS_XX,
159 .hci_bus = HCI_UART,
160 .config_needed = true,
161 .has_rom_version = true,
162 .fw_name = "rtl_bt/rtl8723cs_xx_fw",
163 .cfg_name = "rtl_bt/rtl8723cs_xx_config",
164 .hw_info = "rtl8723cs" },
165
166 /* 8723D */
167 { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
168 .config_needed = true,
169 .has_rom_version = true,
170 .fw_name = "rtl_bt/rtl8723d_fw",
171 .cfg_name = "rtl_bt/rtl8723d_config",
172 .hw_info = "rtl8723du" },
173
174 /* 8723DS */
175 { IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
176 .config_needed = true,
177 .has_rom_version = true,
178 .fw_name = "rtl_bt/rtl8723ds_fw",
179 .cfg_name = "rtl_bt/rtl8723ds_config",
180 .hw_info = "rtl8723ds" },
181
182 /* 8821A */
183 { IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
184 .config_needed = false,
185 .has_rom_version = true,
186 .fw_name = "rtl_bt/rtl8821a_fw",
187 .cfg_name = "rtl_bt/rtl8821a_config",
188 .hw_info = "rtl8821au" },
189
190 /* 8821C */
191 { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
192 .config_needed = false,
193 .has_rom_version = true,
194 .has_msft_ext = true,
195 .fw_name = "rtl_bt/rtl8821c_fw",
196 .cfg_name = "rtl_bt/rtl8821c_config",
197 .hw_info = "rtl8821cu" },
198
199 /* 8821CS */
200 { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_UART),
201 .config_needed = true,
202 .has_rom_version = true,
203 .has_msft_ext = true,
204 .fw_name = "rtl_bt/rtl8821cs_fw",
205 .cfg_name = "rtl_bt/rtl8821cs_config",
206 .hw_info = "rtl8821cs" },
207
208 /* 8761A */
209 { IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
210 .config_needed = false,
211 .has_rom_version = true,
212 .fw_name = "rtl_bt/rtl8761a_fw",
213 .cfg_name = "rtl_bt/rtl8761a_config",
214 .hw_info = "rtl8761au" },
215
216 /* 8761B */
217 { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
218 .config_needed = false,
219 .has_rom_version = true,
220 .has_msft_ext = true,
221 .fw_name = "rtl_bt/rtl8761b_fw",
222 .cfg_name = "rtl_bt/rtl8761b_config",
223 .hw_info = "rtl8761btv" },
224
225 /* 8761BU */
226 { IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
227 .config_needed = false,
228 .has_rom_version = true,
229 .fw_name = "rtl_bt/rtl8761bu_fw",
230 .cfg_name = "rtl_bt/rtl8761bu_config",
231 .hw_info = "rtl8761bu" },
232
233 /* 8822C with UART interface */
234 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
235 .config_needed = true,
236 .has_rom_version = true,
237 .has_msft_ext = true,
238 .fw_name = "rtl_bt/rtl8822cs_fw",
239 .cfg_name = "rtl_bt/rtl8822cs_config",
240 .hw_info = "rtl8822cs" },
241
242 /* 8822C with UART interface */
243 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_UART),
244 .config_needed = true,
245 .has_rom_version = true,
246 .has_msft_ext = true,
247 .fw_name = "rtl_bt/rtl8822cs_fw",
248 .cfg_name = "rtl_bt/rtl8822cs_config",
249 .hw_info = "rtl8822cs" },
250
251 /* 8822C with USB interface */
252 { IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_USB),
253 .config_needed = false,
254 .has_rom_version = true,
255 .has_msft_ext = true,
256 .fw_name = "rtl_bt/rtl8822cu_fw",
257 .cfg_name = "rtl_bt/rtl8822cu_config",
258 .hw_info = "rtl8822cu" },
259
260 /* 8822B */
261 { IC_INFO(RTL_ROM_LMP_8822B, 0xb, 0x7, HCI_USB),
262 .config_needed = true,
263 .has_rom_version = true,
264 .has_msft_ext = true,
265 .fw_name = "rtl_bt/rtl8822b_fw",
266 .cfg_name = "rtl_bt/rtl8822b_config",
267 .hw_info = "rtl8822bu" },
268
269 /* 8852A */
270 { IC_INFO(RTL_ROM_LMP_8852A, 0xa, 0xb, HCI_USB),
271 .config_needed = false,
272 .has_rom_version = true,
273 .has_msft_ext = true,
274 .fw_name = "rtl_bt/rtl8852au_fw",
275 .cfg_name = "rtl_bt/rtl8852au_config",
276 .hw_info = "rtl8852au" },
277
278 /* 8852B with UART interface */
279 { IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_UART),
280 .config_needed = true,
281 .has_rom_version = true,
282 .has_msft_ext = true,
283 .fw_name = "rtl_bt/rtl8852bs_fw",
284 .cfg_name = "rtl_bt/rtl8852bs_config",
285 .hw_info = "rtl8852bs" },
286
287 /* 8852B */
288 { IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_USB),
289 .config_needed = false,
290 .has_rom_version = true,
291 .has_msft_ext = true,
292 .fw_name = "rtl_bt/rtl8852bu_fw",
293 .cfg_name = "rtl_bt/rtl8852bu_config",
294 .hw_info = "rtl8852bu" },
295
296 /* 8852C */
297 { IC_INFO(RTL_ROM_LMP_8852A, 0xc, 0xc, HCI_USB),
298 .config_needed = false,
299 .has_rom_version = true,
300 .has_msft_ext = true,
301 .fw_name = "rtl_bt/rtl8852cu_fw",
302 .cfg_name = "rtl_bt/rtl8852cu_config",
303 .hw_info = "rtl8852cu" },
304
305 /* 8851B */
306 { IC_INFO(RTL_ROM_LMP_8851B, 0xb, 0xc, HCI_USB),
307 .config_needed = false,
308 .has_rom_version = true,
309 .has_msft_ext = false,
310 .fw_name = "rtl_bt/rtl8851bu_fw",
311 .cfg_name = "rtl_bt/rtl8851bu_config",
312 .hw_info = "rtl8851bu" },
313
314 /* 8922A */
315 { IC_INFO(RTL_ROM_LMP_8922A, 0xa, 0xc, HCI_USB),
316 .config_needed = false,
317 .has_rom_version = true,
318 .has_msft_ext = true,
319 .fw_name = "rtl_bt/rtl8922au_fw",
320 .cfg_name = "rtl_bt/rtl8922au_config",
321 .hw_info = "rtl8922au" },
322
323 /* 8852BT/8852BE-VT */
324 { IC_INFO(RTL_ROM_LMP_8852A, 0x87, 0xc, HCI_USB),
325 .config_needed = false,
326 .has_rom_version = true,
327 .has_msft_ext = true,
328 .fw_name = "rtl_bt/rtl8852btu_fw",
329 .cfg_name = "rtl_bt/rtl8852btu_config",
330 .hw_info = "rtl8852btu" },
331 };
332
btrtl_match_ic(u16 lmp_subver,u16 hci_rev,u8 hci_ver,u8 hci_bus,u8 chip_type)333 static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
334 u8 hci_ver, u8 hci_bus,
335 u8 chip_type)
336 {
337 int i;
338
339 for (i = 0; i < ARRAY_SIZE(ic_id_table); i++) {
340 if ((ic_id_table[i].match_flags & IC_MATCH_FL_LMPSUBV) &&
341 (ic_id_table[i].lmp_subver != lmp_subver))
342 continue;
343 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIREV) &&
344 (ic_id_table[i].hci_rev != hci_rev))
345 continue;
346 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
347 (ic_id_table[i].hci_ver != hci_ver))
348 continue;
349 if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
350 (ic_id_table[i].hci_bus != hci_bus))
351 continue;
352 if ((ic_id_table[i].match_flags & IC_MATCH_FL_CHIP_TYPE) &&
353 (ic_id_table[i].chip_type != chip_type))
354 continue;
355
356 break;
357 }
358 if (i >= ARRAY_SIZE(ic_id_table))
359 return NULL;
360
361 return &ic_id_table[i];
362 }
363
btrtl_read_local_version(struct hci_dev * hdev)364 static struct sk_buff *btrtl_read_local_version(struct hci_dev *hdev)
365 {
366 struct sk_buff *skb;
367
368 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
369 HCI_INIT_TIMEOUT);
370 if (IS_ERR(skb)) {
371 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION failed (%ld)",
372 PTR_ERR(skb));
373 return skb;
374 }
375
376 if (skb->len != sizeof(struct hci_rp_read_local_version)) {
377 rtl_dev_err(hdev, "HCI_OP_READ_LOCAL_VERSION event length mismatch");
378 kfree_skb(skb);
379 return ERR_PTR(-EIO);
380 }
381
382 return skb;
383 }
384
rtl_read_rom_version(struct hci_dev * hdev,u8 * version)385 static int rtl_read_rom_version(struct hci_dev *hdev, u8 *version)
386 {
387 struct rtl_rom_version_evt *rom_version;
388 struct sk_buff *skb;
389
390 /* Read RTL ROM version command */
391 skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT);
392 if (IS_ERR(skb)) {
393 rtl_dev_err(hdev, "Read ROM version failed (%ld)",
394 PTR_ERR(skb));
395 return PTR_ERR(skb);
396 }
397
398 if (skb->len != sizeof(*rom_version)) {
399 rtl_dev_err(hdev, "version event length mismatch");
400 kfree_skb(skb);
401 return -EIO;
402 }
403
404 rom_version = (struct rtl_rom_version_evt *)skb->data;
405 rtl_dev_info(hdev, "rom_version status=%x version=%x",
406 rom_version->status, rom_version->version);
407
408 *version = rom_version->version;
409
410 kfree_skb(skb);
411 return 0;
412 }
413
btrtl_vendor_read_reg16(struct hci_dev * hdev,struct rtl_vendor_cmd * cmd,u8 * rp)414 static int btrtl_vendor_read_reg16(struct hci_dev *hdev,
415 struct rtl_vendor_cmd *cmd, u8 *rp)
416 {
417 struct sk_buff *skb;
418 int err = 0;
419
420 skb = __hci_cmd_sync(hdev, 0xfc61, sizeof(*cmd), cmd,
421 HCI_INIT_TIMEOUT);
422 if (IS_ERR(skb)) {
423 err = PTR_ERR(skb);
424 rtl_dev_err(hdev, "RTL: Read reg16 failed (%d)", err);
425 return err;
426 }
427
428 if (skb->len != 3 || skb->data[0]) {
429 bt_dev_err(hdev, "RTL: Read reg16 length mismatch");
430 kfree_skb(skb);
431 return -EIO;
432 }
433
434 if (rp)
435 memcpy(rp, skb->data + 1, 2);
436
437 kfree_skb(skb);
438
439 return 0;
440 }
441
rtl_iov_pull_data(struct rtl_iovec * iov,u32 len)442 static void *rtl_iov_pull_data(struct rtl_iovec *iov, u32 len)
443 {
444 void *data = iov->data;
445
446 if (iov->len < len)
447 return NULL;
448
449 iov->data += len;
450 iov->len -= len;
451
452 return data;
453 }
454
btrtl_insert_ordered_subsec(struct rtl_subsection * node,struct btrtl_device_info * btrtl_dev)455 static void btrtl_insert_ordered_subsec(struct rtl_subsection *node,
456 struct btrtl_device_info *btrtl_dev)
457 {
458 struct list_head *pos;
459 struct list_head *next;
460 struct rtl_subsection *subsec;
461
462 list_for_each_safe(pos, next, &btrtl_dev->patch_subsecs) {
463 subsec = list_entry(pos, struct rtl_subsection, list);
464 if (subsec->prio >= node->prio)
465 break;
466 }
467 __list_add(&node->list, pos->prev, pos);
468 }
469
btrtl_parse_section(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev,u32 opcode,u8 * data,u32 len)470 static int btrtl_parse_section(struct hci_dev *hdev,
471 struct btrtl_device_info *btrtl_dev, u32 opcode,
472 u8 *data, u32 len)
473 {
474 struct rtl_section_hdr *hdr;
475 struct rtl_subsection *subsec;
476 struct rtl_common_subsec *common_subsec;
477 struct rtl_sec_hdr *sec_hdr;
478 int i;
479 u8 *ptr;
480 u16 num_subsecs;
481 u32 subsec_len;
482 int rc = 0;
483 struct rtl_iovec iov = {
484 .data = data,
485 .len = len,
486 };
487
488 hdr = rtl_iov_pull_data(&iov, sizeof(*hdr));
489 if (!hdr)
490 return -EINVAL;
491 num_subsecs = le16_to_cpu(hdr->num);
492
493 for (i = 0; i < num_subsecs; i++) {
494 common_subsec = rtl_iov_pull_data(&iov, sizeof(*common_subsec));
495 if (!common_subsec)
496 break;
497 subsec_len = le32_to_cpu(common_subsec->len);
498
499 rtl_dev_dbg(hdev, "subsec, eco 0x%02x, len %08x",
500 common_subsec->eco, subsec_len);
501
502 ptr = rtl_iov_pull_data(&iov, subsec_len);
503 if (!ptr)
504 break;
505
506 if (common_subsec->eco != btrtl_dev->rom_version + 1)
507 continue;
508
509 switch (opcode) {
510 case RTL_PATCH_SECURITY_HEADER:
511 sec_hdr = (void *)common_subsec;
512 if (sec_hdr->key_id != btrtl_dev->key_id)
513 continue;
514 break;
515 }
516
517 subsec = kzalloc(sizeof(*subsec), GFP_KERNEL);
518 if (!subsec)
519 return -ENOMEM;
520 subsec->opcode = opcode;
521 subsec->prio = common_subsec->prio;
522 subsec->len = subsec_len;
523 subsec->data = ptr;
524 btrtl_insert_ordered_subsec(subsec, btrtl_dev);
525 rc += subsec_len;
526 }
527
528 return rc;
529 }
530
rtlbt_parse_firmware_v2(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev,unsigned char ** _buf)531 static int rtlbt_parse_firmware_v2(struct hci_dev *hdev,
532 struct btrtl_device_info *btrtl_dev,
533 unsigned char **_buf)
534 {
535 struct rtl_epatch_header_v2 *hdr;
536 int rc;
537 u8 reg_val[2];
538 u8 key_id;
539 u32 num_sections;
540 struct rtl_section *section;
541 struct rtl_subsection *entry, *tmp;
542 u32 section_len;
543 u32 opcode;
544 int len = 0;
545 int i;
546 u8 *ptr;
547 struct rtl_iovec iov = {
548 .data = btrtl_dev->fw_data,
549 .len = btrtl_dev->fw_len - 7, /* Cut the tail */
550 };
551
552 rc = btrtl_vendor_read_reg16(hdev, RTL_SEC_PROJ, reg_val);
553 if (rc < 0)
554 return -EIO;
555 key_id = reg_val[0];
556
557 rtl_dev_dbg(hdev, "%s: key id %u", __func__, key_id);
558
559 btrtl_dev->key_id = key_id;
560
561 hdr = rtl_iov_pull_data(&iov, sizeof(*hdr));
562 if (!hdr)
563 return -EINVAL;
564 num_sections = le32_to_cpu(hdr->num_sections);
565
566 rtl_dev_dbg(hdev, "FW version %08x-%08x", *((u32 *)hdr->fw_version),
567 *((u32 *)(hdr->fw_version + 4)));
568
569 for (i = 0; i < num_sections; i++) {
570 section = rtl_iov_pull_data(&iov, sizeof(*section));
571 if (!section)
572 break;
573 section_len = le32_to_cpu(section->len);
574 opcode = le32_to_cpu(section->opcode);
575
576 rtl_dev_dbg(hdev, "opcode 0x%04x", section->opcode);
577
578 ptr = rtl_iov_pull_data(&iov, section_len);
579 if (!ptr)
580 break;
581
582 switch (opcode) {
583 case RTL_PATCH_SNIPPETS:
584 rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
585 ptr, section_len);
586 break;
587 case RTL_PATCH_SECURITY_HEADER:
588 /* If key_id from chip is zero, ignore all security
589 * headers.
590 */
591 if (!key_id)
592 break;
593 rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
594 ptr, section_len);
595 break;
596 case RTL_PATCH_DUMMY_HEADER:
597 rc = btrtl_parse_section(hdev, btrtl_dev, opcode,
598 ptr, section_len);
599 break;
600 default:
601 rc = 0;
602 break;
603 }
604 if (rc < 0) {
605 rtl_dev_err(hdev, "RTL: Parse section (%u) err %d",
606 opcode, rc);
607 return rc;
608 }
609 len += rc;
610 }
611
612 if (!len)
613 return -ENODATA;
614
615 /* Allocate mem and copy all found subsecs. */
616 ptr = kvmalloc(len, GFP_KERNEL);
617 if (!ptr)
618 return -ENOMEM;
619
620 len = 0;
621 list_for_each_entry_safe(entry, tmp, &btrtl_dev->patch_subsecs, list) {
622 rtl_dev_dbg(hdev, "RTL: opcode %08x, addr %p, len 0x%x",
623 entry->opcode, entry->data, entry->len);
624 memcpy(ptr + len, entry->data, entry->len);
625 len += entry->len;
626 }
627
628 if (!len)
629 return -EPERM;
630
631 *_buf = ptr;
632 return len;
633 }
634
rtlbt_parse_firmware(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev,unsigned char ** _buf)635 static int rtlbt_parse_firmware(struct hci_dev *hdev,
636 struct btrtl_device_info *btrtl_dev,
637 unsigned char **_buf)
638 {
639 static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
640 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
641 struct rtl_epatch_header *epatch_info;
642 unsigned char *buf;
643 int i, len;
644 size_t min_size;
645 u8 opcode, length, data;
646 int project_id = -1;
647 const unsigned char *fwptr, *chip_id_base;
648 const unsigned char *patch_length_base, *patch_offset_base;
649 u32 patch_offset = 0;
650 u16 patch_length, num_patches;
651 static const struct {
652 __u16 lmp_subver;
653 __u8 id;
654 } project_id_to_lmp_subver[] = {
655 { RTL_ROM_LMP_8723A, 0 },
656 { RTL_ROM_LMP_8723B, 1 },
657 { RTL_ROM_LMP_8821A, 2 },
658 { RTL_ROM_LMP_8761A, 3 },
659 { RTL_ROM_LMP_8703B, 7 },
660 { RTL_ROM_LMP_8822B, 8 },
661 { RTL_ROM_LMP_8723B, 9 }, /* 8723D */
662 { RTL_ROM_LMP_8821A, 10 }, /* 8821C */
663 { RTL_ROM_LMP_8822B, 13 }, /* 8822C */
664 { RTL_ROM_LMP_8761A, 14 }, /* 8761B */
665 { RTL_ROM_LMP_8852A, 18 }, /* 8852A */
666 { RTL_ROM_LMP_8852A, 20 }, /* 8852B */
667 { RTL_ROM_LMP_8852A, 25 }, /* 8852C */
668 { RTL_ROM_LMP_8851B, 36 }, /* 8851B */
669 { RTL_ROM_LMP_8922A, 44 }, /* 8922A */
670 { RTL_ROM_LMP_8852A, 47 }, /* 8852BT */
671 };
672
673 if (btrtl_dev->fw_len <= 8)
674 return -EINVAL;
675
676 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8))
677 min_size = sizeof(struct rtl_epatch_header) +
678 sizeof(extension_sig) + 3;
679 else if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE_V2, 8))
680 min_size = sizeof(struct rtl_epatch_header_v2) +
681 sizeof(extension_sig) + 3;
682 else
683 return -EINVAL;
684
685 if (btrtl_dev->fw_len < min_size)
686 return -EINVAL;
687
688 fwptr = btrtl_dev->fw_data + btrtl_dev->fw_len - sizeof(extension_sig);
689 if (memcmp(fwptr, extension_sig, sizeof(extension_sig)) != 0) {
690 rtl_dev_err(hdev, "extension section signature mismatch");
691 return -EINVAL;
692 }
693
694 /* Loop from the end of the firmware parsing instructions, until
695 * we find an instruction that identifies the "project ID" for the
696 * hardware supported by this firwmare file.
697 * Once we have that, we double-check that project_id is suitable
698 * for the hardware we are working with.
699 */
700 while (fwptr >= btrtl_dev->fw_data + (sizeof(*epatch_info) + 3)) {
701 opcode = *--fwptr;
702 length = *--fwptr;
703 data = *--fwptr;
704
705 BT_DBG("check op=%x len=%x data=%x", opcode, length, data);
706
707 if (opcode == 0xff) /* EOF */
708 break;
709
710 if (length == 0) {
711 rtl_dev_err(hdev, "found instruction with length 0");
712 return -EINVAL;
713 }
714
715 if (opcode == 0 && length == 1) {
716 project_id = data;
717 break;
718 }
719
720 fwptr -= length;
721 }
722
723 if (project_id < 0) {
724 rtl_dev_err(hdev, "failed to find version instruction");
725 return -EINVAL;
726 }
727
728 /* Find project_id in table */
729 for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
730 if (project_id == project_id_to_lmp_subver[i].id) {
731 btrtl_dev->project_id = project_id;
732 break;
733 }
734 }
735
736 if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
737 rtl_dev_err(hdev, "unknown project id %d", project_id);
738 return -EINVAL;
739 }
740
741 if (btrtl_dev->ic_info->lmp_subver !=
742 project_id_to_lmp_subver[i].lmp_subver) {
743 rtl_dev_err(hdev, "firmware is for %x but this is a %x",
744 project_id_to_lmp_subver[i].lmp_subver,
745 btrtl_dev->ic_info->lmp_subver);
746 return -EINVAL;
747 }
748
749 if (memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8) != 0) {
750 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE_V2, 8))
751 return rtlbt_parse_firmware_v2(hdev, btrtl_dev, _buf);
752 rtl_dev_err(hdev, "bad EPATCH signature");
753 return -EINVAL;
754 }
755
756 epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
757 num_patches = le16_to_cpu(epatch_info->num_patches);
758
759 BT_DBG("fw_version=%x, num_patches=%d",
760 le32_to_cpu(epatch_info->fw_version), num_patches);
761 coredump_info->rtl_dump.fw_version = le32_to_cpu(epatch_info->fw_version);
762
763 /* After the rtl_epatch_header there is a funky patch metadata section.
764 * Assuming 2 patches, the layout is:
765 * ChipID1 ChipID2 PatchLength1 PatchLength2 PatchOffset1 PatchOffset2
766 *
767 * Find the right patch for this chip.
768 */
769 min_size += 8 * num_patches;
770 if (btrtl_dev->fw_len < min_size)
771 return -EINVAL;
772
773 chip_id_base = btrtl_dev->fw_data + sizeof(struct rtl_epatch_header);
774 patch_length_base = chip_id_base + (sizeof(u16) * num_patches);
775 patch_offset_base = patch_length_base + (sizeof(u16) * num_patches);
776 for (i = 0; i < num_patches; i++) {
777 u16 chip_id = get_unaligned_le16(chip_id_base +
778 (i * sizeof(u16)));
779 if (chip_id == btrtl_dev->rom_version + 1) {
780 patch_length = get_unaligned_le16(patch_length_base +
781 (i * sizeof(u16)));
782 patch_offset = get_unaligned_le32(patch_offset_base +
783 (i * sizeof(u32)));
784 break;
785 }
786 }
787
788 if (!patch_offset) {
789 rtl_dev_err(hdev, "didn't find patch for chip id %d",
790 btrtl_dev->rom_version);
791 return -EINVAL;
792 }
793
794 BT_DBG("length=%x offset=%x index %d", patch_length, patch_offset, i);
795 min_size = patch_offset + patch_length;
796 if (btrtl_dev->fw_len < min_size)
797 return -EINVAL;
798
799 /* Copy the firmware into a new buffer and write the version at
800 * the end.
801 */
802 len = patch_length;
803 buf = kvmalloc(patch_length, GFP_KERNEL);
804 if (!buf)
805 return -ENOMEM;
806
807 memcpy(buf, btrtl_dev->fw_data + patch_offset, patch_length - 4);
808 memcpy(buf + patch_length - 4, &epatch_info->fw_version, 4);
809
810 *_buf = buf;
811 return len;
812 }
813
rtl_download_firmware(struct hci_dev * hdev,const unsigned char * data,int fw_len)814 static int rtl_download_firmware(struct hci_dev *hdev,
815 const unsigned char *data, int fw_len)
816 {
817 struct rtl_download_cmd *dl_cmd;
818 int frag_num = fw_len / RTL_FRAG_LEN + 1;
819 int frag_len = RTL_FRAG_LEN;
820 int ret = 0;
821 int i;
822 int j = 0;
823 struct sk_buff *skb;
824 struct hci_rp_read_local_version *rp;
825
826 dl_cmd = kmalloc(sizeof(*dl_cmd), GFP_KERNEL);
827 if (!dl_cmd)
828 return -ENOMEM;
829
830 for (i = 0; i < frag_num; i++) {
831 struct sk_buff *skb;
832
833 dl_cmd->index = j++;
834 if (dl_cmd->index == 0x7f)
835 j = 1;
836
837 if (i == (frag_num - 1)) {
838 dl_cmd->index |= 0x80; /* data end */
839 frag_len = fw_len % RTL_FRAG_LEN;
840 }
841 rtl_dev_dbg(hdev, "download fw (%d/%d). index = %d", i,
842 frag_num, dl_cmd->index);
843 memcpy(dl_cmd->data, data, frag_len);
844
845 /* Send download command */
846 skb = __hci_cmd_sync(hdev, 0xfc20, frag_len + 1, dl_cmd,
847 HCI_INIT_TIMEOUT);
848 if (IS_ERR(skb)) {
849 rtl_dev_err(hdev, "download fw command failed (%ld)",
850 PTR_ERR(skb));
851 ret = PTR_ERR(skb);
852 goto out;
853 }
854
855 if (skb->len != sizeof(struct rtl_download_response)) {
856 rtl_dev_err(hdev, "download fw event length mismatch");
857 kfree_skb(skb);
858 ret = -EIO;
859 goto out;
860 }
861
862 kfree_skb(skb);
863 data += RTL_FRAG_LEN;
864 }
865
866 skb = btrtl_read_local_version(hdev);
867 if (IS_ERR(skb)) {
868 ret = PTR_ERR(skb);
869 rtl_dev_err(hdev, "read local version failed");
870 goto out;
871 }
872
873 rp = (struct hci_rp_read_local_version *)skb->data;
874 rtl_dev_info(hdev, "fw version 0x%04x%04x",
875 __le16_to_cpu(rp->hci_rev), __le16_to_cpu(rp->lmp_subver));
876 kfree_skb(skb);
877
878 out:
879 kfree(dl_cmd);
880 return ret;
881 }
882
rtl_load_file(struct hci_dev * hdev,const char * name,u8 ** buff)883 static int rtl_load_file(struct hci_dev *hdev, const char *name, u8 **buff)
884 {
885 const struct firmware *fw;
886 int ret;
887
888 rtl_dev_info(hdev, "loading %s", name);
889 ret = request_firmware(&fw, name, &hdev->dev);
890 if (ret < 0)
891 return ret;
892 ret = fw->size;
893 *buff = kvmemdup(fw->data, fw->size, GFP_KERNEL);
894 if (!*buff)
895 ret = -ENOMEM;
896
897 release_firmware(fw);
898
899 return ret;
900 }
901
btrtl_setup_rtl8723a(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev)902 static int btrtl_setup_rtl8723a(struct hci_dev *hdev,
903 struct btrtl_device_info *btrtl_dev)
904 {
905 if (btrtl_dev->fw_len < 8)
906 return -EINVAL;
907
908 /* Check that the firmware doesn't have the epatch signature
909 * (which is only for RTL8723B and newer).
910 */
911 if (!memcmp(btrtl_dev->fw_data, RTL_EPATCH_SIGNATURE, 8)) {
912 rtl_dev_err(hdev, "unexpected EPATCH signature!");
913 return -EINVAL;
914 }
915
916 return rtl_download_firmware(hdev, btrtl_dev->fw_data,
917 btrtl_dev->fw_len);
918 }
919
btrtl_setup_rtl8723b(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev)920 static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
921 struct btrtl_device_info *btrtl_dev)
922 {
923 unsigned char *fw_data = NULL;
924 int ret;
925 u8 *tbuff;
926
927 ret = rtlbt_parse_firmware(hdev, btrtl_dev, &fw_data);
928 if (ret < 0)
929 goto out;
930
931 if (btrtl_dev->cfg_len > 0) {
932 tbuff = kvzalloc(ret + btrtl_dev->cfg_len, GFP_KERNEL);
933 if (!tbuff) {
934 ret = -ENOMEM;
935 goto out;
936 }
937
938 memcpy(tbuff, fw_data, ret);
939 kvfree(fw_data);
940
941 memcpy(tbuff + ret, btrtl_dev->cfg_data, btrtl_dev->cfg_len);
942 ret += btrtl_dev->cfg_len;
943
944 fw_data = tbuff;
945 }
946
947 rtl_dev_info(hdev, "cfg_sz %d, total sz %d", btrtl_dev->cfg_len, ret);
948
949 ret = rtl_download_firmware(hdev, fw_data, ret);
950
951 out:
952 kvfree(fw_data);
953 return ret;
954 }
955
btrtl_coredump(struct hci_dev * hdev)956 static void btrtl_coredump(struct hci_dev *hdev)
957 {
958 static const u8 param[] = { 0x00, 0x00 };
959
960 __hci_cmd_send(hdev, RTL_VSC_OP_COREDUMP, sizeof(param), param);
961 }
962
btrtl_dmp_hdr(struct hci_dev * hdev,struct sk_buff * skb)963 static void btrtl_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
964 {
965 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
966 char buf[80];
967
968 if (coredump_info->rtl_dump.controller)
969 snprintf(buf, sizeof(buf), "Controller Name: %s\n",
970 coredump_info->rtl_dump.controller);
971 else
972 snprintf(buf, sizeof(buf), "Controller Name: Unknown\n");
973 skb_put_data(skb, buf, strlen(buf));
974
975 snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
976 coredump_info->rtl_dump.fw_version);
977 skb_put_data(skb, buf, strlen(buf));
978
979 snprintf(buf, sizeof(buf), "Driver: %s\n", coredump_info->rtl_dump.driver_name);
980 skb_put_data(skb, buf, strlen(buf));
981
982 snprintf(buf, sizeof(buf), "Vendor: Realtek\n");
983 skb_put_data(skb, buf, strlen(buf));
984 }
985
btrtl_register_devcoredump_support(struct hci_dev * hdev)986 static void btrtl_register_devcoredump_support(struct hci_dev *hdev)
987 {
988 hci_devcd_register(hdev, btrtl_coredump, btrtl_dmp_hdr, NULL);
989
990 }
991
btrtl_set_driver_name(struct hci_dev * hdev,const char * driver_name)992 void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name)
993 {
994 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
995
996 coredump_info->rtl_dump.driver_name = driver_name;
997 }
998 EXPORT_SYMBOL_GPL(btrtl_set_driver_name);
999
rtl_has_chip_type(u16 lmp_subver)1000 static bool rtl_has_chip_type(u16 lmp_subver)
1001 {
1002 switch (lmp_subver) {
1003 case RTL_ROM_LMP_8703B:
1004 return true;
1005 default:
1006 break;
1007 }
1008
1009 return false;
1010 }
1011
rtl_read_chip_type(struct hci_dev * hdev,u8 * type)1012 static int rtl_read_chip_type(struct hci_dev *hdev, u8 *type)
1013 {
1014 struct rtl_chip_type_evt *chip_type;
1015 struct sk_buff *skb;
1016 const unsigned char cmd_buf[] = {0x00, 0x94, 0xa0, 0x00, 0xb0};
1017
1018 /* Read RTL chip type command */
1019 skb = __hci_cmd_sync(hdev, 0xfc61, 5, cmd_buf, HCI_INIT_TIMEOUT);
1020 if (IS_ERR(skb)) {
1021 rtl_dev_err(hdev, "Read chip type failed (%ld)",
1022 PTR_ERR(skb));
1023 return PTR_ERR(skb);
1024 }
1025
1026 chip_type = skb_pull_data(skb, sizeof(*chip_type));
1027 if (!chip_type) {
1028 rtl_dev_err(hdev, "RTL chip type event length mismatch");
1029 kfree_skb(skb);
1030 return -EIO;
1031 }
1032
1033 rtl_dev_info(hdev, "chip_type status=%x type=%x",
1034 chip_type->status, chip_type->type);
1035
1036 *type = chip_type->type & 0x0f;
1037
1038 kfree_skb(skb);
1039 return 0;
1040 }
1041
btrtl_free(struct btrtl_device_info * btrtl_dev)1042 void btrtl_free(struct btrtl_device_info *btrtl_dev)
1043 {
1044 struct rtl_subsection *entry, *tmp;
1045
1046 kvfree(btrtl_dev->fw_data);
1047 kvfree(btrtl_dev->cfg_data);
1048
1049 list_for_each_entry_safe(entry, tmp, &btrtl_dev->patch_subsecs, list) {
1050 list_del(&entry->list);
1051 kfree(entry);
1052 }
1053
1054 kfree(btrtl_dev);
1055 }
1056 EXPORT_SYMBOL_GPL(btrtl_free);
1057
btrtl_initialize(struct hci_dev * hdev,const char * postfix)1058 struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
1059 const char *postfix)
1060 {
1061 struct btrealtek_data *coredump_info = hci_get_priv(hdev);
1062 struct btrtl_device_info *btrtl_dev;
1063 struct sk_buff *skb;
1064 struct hci_rp_read_local_version *resp;
1065 struct hci_command_hdr *cmd;
1066 char fw_name[40];
1067 char cfg_name[40];
1068 u16 hci_rev, lmp_subver;
1069 u8 hci_ver, lmp_ver, chip_type = 0;
1070 int ret;
1071 u8 reg_val[2];
1072
1073 btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
1074 if (!btrtl_dev) {
1075 ret = -ENOMEM;
1076 goto err_alloc;
1077 }
1078
1079 INIT_LIST_HEAD(&btrtl_dev->patch_subsecs);
1080
1081 check_version:
1082 ret = btrtl_vendor_read_reg16(hdev, RTL_CHIP_SUBVER, reg_val);
1083 if (ret < 0)
1084 goto err_free;
1085 lmp_subver = get_unaligned_le16(reg_val);
1086
1087 if (lmp_subver == RTL_ROM_LMP_8822B) {
1088 ret = btrtl_vendor_read_reg16(hdev, RTL_CHIP_REV, reg_val);
1089 if (ret < 0)
1090 goto err_free;
1091 hci_rev = get_unaligned_le16(reg_val);
1092
1093 /* 8822E */
1094 if (hci_rev == 0x000e) {
1095 hci_ver = 0x0c;
1096 lmp_ver = 0x0c;
1097 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev,
1098 hci_ver, hdev->bus,
1099 chip_type);
1100 goto next;
1101 }
1102 }
1103
1104 skb = btrtl_read_local_version(hdev);
1105 if (IS_ERR(skb)) {
1106 ret = PTR_ERR(skb);
1107 goto err_free;
1108 }
1109
1110 resp = (struct hci_rp_read_local_version *)skb->data;
1111
1112 hci_ver = resp->hci_ver;
1113 hci_rev = le16_to_cpu(resp->hci_rev);
1114 lmp_ver = resp->lmp_ver;
1115 lmp_subver = le16_to_cpu(resp->lmp_subver);
1116
1117 kfree_skb(skb);
1118
1119 if (rtl_has_chip_type(lmp_subver)) {
1120 ret = rtl_read_chip_type(hdev, &chip_type);
1121 if (ret)
1122 goto err_free;
1123 }
1124
1125 btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
1126 hdev->bus, chip_type);
1127
1128 next:
1129 rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x lmp_ver=%02x lmp_subver=%04x",
1130 hci_ver, hci_rev,
1131 lmp_ver, lmp_subver);
1132
1133 if (!btrtl_dev->ic_info && !btrtl_dev->drop_fw)
1134 btrtl_dev->drop_fw = true;
1135 else
1136 btrtl_dev->drop_fw = false;
1137
1138 if (btrtl_dev->drop_fw) {
1139 skb = bt_skb_alloc(sizeof(*cmd), GFP_KERNEL);
1140 if (!skb)
1141 goto err_free;
1142
1143 cmd = skb_put(skb, HCI_COMMAND_HDR_SIZE);
1144 cmd->opcode = cpu_to_le16(0xfc66);
1145 cmd->plen = 0;
1146
1147 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1148
1149 ret = hdev->send(hdev, skb);
1150 if (ret < 0) {
1151 bt_dev_err(hdev, "sending frame failed (%d)", ret);
1152 kfree_skb(skb);
1153 goto err_free;
1154 }
1155
1156 /* Ensure the above vendor command is sent to controller and
1157 * process has done.
1158 */
1159 msleep(200);
1160
1161 goto check_version;
1162 }
1163
1164 if (!btrtl_dev->ic_info) {
1165 rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
1166 lmp_subver, hci_rev, hci_ver);
1167 return btrtl_dev;
1168 }
1169
1170 if (btrtl_dev->ic_info->has_rom_version) {
1171 ret = rtl_read_rom_version(hdev, &btrtl_dev->rom_version);
1172 if (ret)
1173 goto err_free;
1174 }
1175
1176 if (!btrtl_dev->ic_info->fw_name) {
1177 ret = -ENOMEM;
1178 goto err_free;
1179 }
1180
1181 btrtl_dev->fw_len = -EIO;
1182 if (lmp_subver == RTL_ROM_LMP_8852A && hci_rev == 0x000c) {
1183 snprintf(fw_name, sizeof(fw_name), "%s_v2.bin",
1184 btrtl_dev->ic_info->fw_name);
1185 btrtl_dev->fw_len = rtl_load_file(hdev, fw_name,
1186 &btrtl_dev->fw_data);
1187 }
1188
1189 if (btrtl_dev->fw_len < 0) {
1190 snprintf(fw_name, sizeof(fw_name), "%s.bin",
1191 btrtl_dev->ic_info->fw_name);
1192 btrtl_dev->fw_len = rtl_load_file(hdev, fw_name,
1193 &btrtl_dev->fw_data);
1194 }
1195
1196 if (btrtl_dev->fw_len < 0) {
1197 rtl_dev_err(hdev, "firmware file %s not found",
1198 btrtl_dev->ic_info->fw_name);
1199 ret = btrtl_dev->fw_len;
1200 goto err_free;
1201 }
1202
1203 if (btrtl_dev->ic_info->cfg_name) {
1204 if (postfix) {
1205 snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin",
1206 btrtl_dev->ic_info->cfg_name, postfix);
1207 } else {
1208 snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
1209 btrtl_dev->ic_info->cfg_name);
1210 }
1211 btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
1212 &btrtl_dev->cfg_data);
1213 if (btrtl_dev->ic_info->config_needed &&
1214 btrtl_dev->cfg_len <= 0) {
1215 rtl_dev_err(hdev, "mandatory config file %s not found",
1216 btrtl_dev->ic_info->cfg_name);
1217 ret = btrtl_dev->cfg_len;
1218 goto err_free;
1219 }
1220 }
1221
1222 /* The following chips supports the Microsoft vendor extension,
1223 * therefore set the corresponding VsMsftOpCode.
1224 */
1225 if (btrtl_dev->ic_info->has_msft_ext)
1226 hci_set_msft_opcode(hdev, 0xFCF0);
1227
1228 if (btrtl_dev->ic_info)
1229 coredump_info->rtl_dump.controller = btrtl_dev->ic_info->hw_info;
1230
1231 return btrtl_dev;
1232
1233 err_free:
1234 btrtl_free(btrtl_dev);
1235 err_alloc:
1236 return ERR_PTR(ret);
1237 }
1238 EXPORT_SYMBOL_GPL(btrtl_initialize);
1239
btrtl_download_firmware(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev)1240 int btrtl_download_firmware(struct hci_dev *hdev,
1241 struct btrtl_device_info *btrtl_dev)
1242 {
1243 int err = 0;
1244
1245 /* Match a set of subver values that correspond to stock firmware,
1246 * which is not compatible with standard btusb.
1247 * If matched, upload an alternative firmware that does conform to
1248 * standard btusb. Once that firmware is uploaded, the subver changes
1249 * to a different value.
1250 */
1251 if (!btrtl_dev->ic_info) {
1252 rtl_dev_info(hdev, "assuming no firmware upload needed");
1253 err = 0;
1254 goto done;
1255 }
1256
1257 switch (btrtl_dev->ic_info->lmp_subver) {
1258 case RTL_ROM_LMP_8723A:
1259 err = btrtl_setup_rtl8723a(hdev, btrtl_dev);
1260 break;
1261 case RTL_ROM_LMP_8723B:
1262 case RTL_ROM_LMP_8821A:
1263 case RTL_ROM_LMP_8761A:
1264 case RTL_ROM_LMP_8822B:
1265 case RTL_ROM_LMP_8852A:
1266 case RTL_ROM_LMP_8703B:
1267 case RTL_ROM_LMP_8851B:
1268 case RTL_ROM_LMP_8922A:
1269 err = btrtl_setup_rtl8723b(hdev, btrtl_dev);
1270 break;
1271 default:
1272 rtl_dev_info(hdev, "assuming no firmware upload needed");
1273 break;
1274 }
1275
1276 done:
1277 btrtl_register_devcoredump_support(hdev);
1278
1279 return err;
1280 }
1281 EXPORT_SYMBOL_GPL(btrtl_download_firmware);
1282
btrtl_set_quirks(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev)1283 void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
1284 {
1285 /* Enable controller to do both LE scan and BR/EDR inquiry
1286 * simultaneously.
1287 */
1288 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1289
1290 /* Enable central-peripheral role (able to create new connections with
1291 * an existing connection in slave role).
1292 */
1293 /* Enable WBS supported for the specific Realtek devices. */
1294 switch (btrtl_dev->project_id) {
1295 case CHIP_ID_8822C:
1296 case CHIP_ID_8852A:
1297 case CHIP_ID_8852B:
1298 case CHIP_ID_8852C:
1299 case CHIP_ID_8851B:
1300 case CHIP_ID_8922A:
1301 case CHIP_ID_8852BT:
1302 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1303
1304 /* RTL8852C needs to transmit mSBC data continuously without
1305 * the zero length of USB packets for the ALT 6 supported chips
1306 */
1307 if (btrtl_dev->project_id == CHIP_ID_8852C)
1308 btrealtek_set_flag(hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP);
1309
1310 if (btrtl_dev->project_id == CHIP_ID_8852A ||
1311 btrtl_dev->project_id == CHIP_ID_8852B ||
1312 btrtl_dev->project_id == CHIP_ID_8852C)
1313 set_bit(HCI_QUIRK_USE_MSFT_EXT_ADDRESS_FILTER, &hdev->quirks);
1314
1315 hci_set_aosp_capable(hdev);
1316 break;
1317 default:
1318 rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
1319 rtl_dev_dbg(hdev, "WBS supported not enabled.");
1320 break;
1321 }
1322
1323 if (!btrtl_dev->ic_info)
1324 return;
1325
1326 switch (btrtl_dev->ic_info->lmp_subver) {
1327 case RTL_ROM_LMP_8703B:
1328 /* 8723CS reports two pages for local ext features,
1329 * but it doesn't support any features from page 2 -
1330 * it either responds with garbage or with error status
1331 */
1332 set_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
1333 &hdev->quirks);
1334 break;
1335 default:
1336 break;
1337 }
1338 }
1339 EXPORT_SYMBOL_GPL(btrtl_set_quirks);
1340
btrtl_setup_realtek(struct hci_dev * hdev)1341 int btrtl_setup_realtek(struct hci_dev *hdev)
1342 {
1343 struct btrtl_device_info *btrtl_dev;
1344 int ret;
1345
1346 btrtl_dev = btrtl_initialize(hdev, NULL);
1347 if (IS_ERR(btrtl_dev))
1348 return PTR_ERR(btrtl_dev);
1349
1350 ret = btrtl_download_firmware(hdev, btrtl_dev);
1351
1352 btrtl_set_quirks(hdev, btrtl_dev);
1353
1354 hci_set_hw_info(hdev,
1355 "RTL lmp_subver=%u hci_rev=%u hci_ver=%u hci_bus=%u",
1356 btrtl_dev->ic_info->lmp_subver,
1357 btrtl_dev->ic_info->hci_rev,
1358 btrtl_dev->ic_info->hci_ver,
1359 btrtl_dev->ic_info->hci_bus);
1360
1361 btrtl_free(btrtl_dev);
1362 return ret;
1363 }
1364 EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
1365
btrtl_shutdown_realtek(struct hci_dev * hdev)1366 int btrtl_shutdown_realtek(struct hci_dev *hdev)
1367 {
1368 struct sk_buff *skb;
1369 int ret;
1370
1371 /* According to the vendor driver, BT must be reset on close to avoid
1372 * firmware crash.
1373 */
1374 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1375 if (IS_ERR(skb)) {
1376 ret = PTR_ERR(skb);
1377 bt_dev_err(hdev, "HCI reset during shutdown failed");
1378 return ret;
1379 }
1380 kfree_skb(skb);
1381
1382 return 0;
1383 }
1384 EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek);
1385
btrtl_convert_baudrate(u32 device_baudrate)1386 static unsigned int btrtl_convert_baudrate(u32 device_baudrate)
1387 {
1388 switch (device_baudrate) {
1389 case 0x0252a00a:
1390 return 230400;
1391
1392 case 0x05f75004:
1393 return 921600;
1394
1395 case 0x00005004:
1396 return 1000000;
1397
1398 case 0x04928002:
1399 case 0x01128002:
1400 return 1500000;
1401
1402 case 0x00005002:
1403 return 2000000;
1404
1405 case 0x0000b001:
1406 return 2500000;
1407
1408 case 0x04928001:
1409 return 3000000;
1410
1411 case 0x052a6001:
1412 return 3500000;
1413
1414 case 0x00005001:
1415 return 4000000;
1416
1417 case 0x0252c014:
1418 default:
1419 return 115200;
1420 }
1421 }
1422
btrtl_get_uart_settings(struct hci_dev * hdev,struct btrtl_device_info * btrtl_dev,unsigned int * controller_baudrate,u32 * device_baudrate,bool * flow_control)1423 int btrtl_get_uart_settings(struct hci_dev *hdev,
1424 struct btrtl_device_info *btrtl_dev,
1425 unsigned int *controller_baudrate,
1426 u32 *device_baudrate, bool *flow_control)
1427 {
1428 struct rtl_vendor_config *config;
1429 struct rtl_vendor_config_entry *entry;
1430 int i, total_data_len;
1431 bool found = false;
1432
1433 total_data_len = btrtl_dev->cfg_len - sizeof(*config);
1434 if (total_data_len <= 0) {
1435 rtl_dev_warn(hdev, "no config loaded");
1436 return -EINVAL;
1437 }
1438
1439 config = (struct rtl_vendor_config *)btrtl_dev->cfg_data;
1440 if (le32_to_cpu(config->signature) != RTL_CONFIG_MAGIC) {
1441 rtl_dev_err(hdev, "invalid config magic");
1442 return -EINVAL;
1443 }
1444
1445 if (total_data_len < le16_to_cpu(config->total_len)) {
1446 rtl_dev_err(hdev, "config is too short");
1447 return -EINVAL;
1448 }
1449
1450 for (i = 0; i < total_data_len; ) {
1451 entry = ((void *)config->entry) + i;
1452
1453 switch (le16_to_cpu(entry->offset)) {
1454 case 0xc:
1455 if (entry->len < sizeof(*device_baudrate)) {
1456 rtl_dev_err(hdev, "invalid UART config entry");
1457 return -EINVAL;
1458 }
1459
1460 *device_baudrate = get_unaligned_le32(entry->data);
1461 *controller_baudrate = btrtl_convert_baudrate(
1462 *device_baudrate);
1463
1464 if (entry->len >= 13)
1465 *flow_control = !!(entry->data[12] & BIT(2));
1466 else
1467 *flow_control = false;
1468
1469 found = true;
1470 break;
1471
1472 default:
1473 rtl_dev_dbg(hdev, "skipping config entry 0x%x (len %u)",
1474 le16_to_cpu(entry->offset), entry->len);
1475 break;
1476 }
1477
1478 i += sizeof(*entry) + entry->len;
1479 }
1480
1481 if (!found) {
1482 rtl_dev_err(hdev, "no UART config entry found");
1483 return -ENOENT;
1484 }
1485
1486 rtl_dev_dbg(hdev, "device baudrate = 0x%08x", *device_baudrate);
1487 rtl_dev_dbg(hdev, "controller baudrate = %u", *controller_baudrate);
1488 rtl_dev_dbg(hdev, "flow control %d", *flow_control);
1489
1490 return 0;
1491 }
1492 EXPORT_SYMBOL_GPL(btrtl_get_uart_settings);
1493
1494 MODULE_AUTHOR("Daniel Drake <drake@endlessm.com>");
1495 MODULE_DESCRIPTION("Bluetooth support for Realtek devices ver " VERSION);
1496 MODULE_VERSION(VERSION);
1497 MODULE_LICENSE("GPL");
1498 MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
1499 MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
1500 MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
1501 MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
1502 MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
1503 MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_fw.bin");
1504 MODULE_FIRMWARE("rtl_bt/rtl8723cs_cg_config.bin");
1505 MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_fw.bin");
1506 MODULE_FIRMWARE("rtl_bt/rtl8723cs_vf_config.bin");
1507 MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_fw.bin");
1508 MODULE_FIRMWARE("rtl_bt/rtl8723cs_xx_config.bin");
1509 MODULE_FIRMWARE("rtl_bt/rtl8723d_fw.bin");
1510 MODULE_FIRMWARE("rtl_bt/rtl8723d_config.bin");
1511 MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
1512 MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
1513 MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
1514 MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
1515 MODULE_FIRMWARE("rtl_bt/rtl8761b_fw.bin");
1516 MODULE_FIRMWARE("rtl_bt/rtl8761b_config.bin");
1517 MODULE_FIRMWARE("rtl_bt/rtl8761bu_fw.bin");
1518 MODULE_FIRMWARE("rtl_bt/rtl8761bu_config.bin");
1519 MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
1520 MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
1521 MODULE_FIRMWARE("rtl_bt/rtl8821c_fw.bin");
1522 MODULE_FIRMWARE("rtl_bt/rtl8821c_config.bin");
1523 MODULE_FIRMWARE("rtl_bt/rtl8821cs_fw.bin");
1524 MODULE_FIRMWARE("rtl_bt/rtl8821cs_config.bin");
1525 MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
1526 MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");
1527 MODULE_FIRMWARE("rtl_bt/rtl8822cs_fw.bin");
1528 MODULE_FIRMWARE("rtl_bt/rtl8822cs_config.bin");
1529 MODULE_FIRMWARE("rtl_bt/rtl8822cu_fw.bin");
1530 MODULE_FIRMWARE("rtl_bt/rtl8822cu_config.bin");
1531 MODULE_FIRMWARE("rtl_bt/rtl8851bu_fw.bin");
1532 MODULE_FIRMWARE("rtl_bt/rtl8851bu_config.bin");
1533 MODULE_FIRMWARE("rtl_bt/rtl8852au_fw.bin");
1534 MODULE_FIRMWARE("rtl_bt/rtl8852au_config.bin");
1535 MODULE_FIRMWARE("rtl_bt/rtl8852bs_fw.bin");
1536 MODULE_FIRMWARE("rtl_bt/rtl8852bs_config.bin");
1537 MODULE_FIRMWARE("rtl_bt/rtl8852bu_fw.bin");
1538 MODULE_FIRMWARE("rtl_bt/rtl8852bu_config.bin");
1539 MODULE_FIRMWARE("rtl_bt/rtl8852btu_fw.bin");
1540 MODULE_FIRMWARE("rtl_bt/rtl8852btu_config.bin");
1541 MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw.bin");
1542 MODULE_FIRMWARE("rtl_bt/rtl8852cu_fw_v2.bin");
1543 MODULE_FIRMWARE("rtl_bt/rtl8852cu_config.bin");
1544 MODULE_FIRMWARE("rtl_bt/rtl8922au_fw.bin");
1545 MODULE_FIRMWARE("rtl_bt/rtl8922au_config.bin");
1546