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gigaset: asyncdata: mark expected switch fall-throughs
[linux/fpc-iii.git] / drivers / bluetooth / btbcm.c
blobe3e4d929e74f52566b385d56731c8e2d8fbf3daa
1 /*
2 *
3 * Bluetooth support for Broadcom devices
4 *
5 * Copyright (C) 2015 Intel Corporation
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 #include <linux/module.h>
25 #include <linux/firmware.h>
26 #include <asm/unaligned.h>
27
28 #include <net/bluetooth/bluetooth.h>
29 #include <net/bluetooth/hci_core.h>
30
31 #include "btbcm.h"
32
33 #define VERSION "0.1"
34
35 #define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
36 #define BDADDR_BCM4324B3 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb3, 0x24, 0x43}})
37 #define BDADDR_BCM4330B1 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb1, 0x30, 0x43}})
38
39 int btbcm_check_bdaddr(struct hci_dev *hdev)
40 {
41 struct hci_rp_read_bd_addr *bda;
42 struct sk_buff *skb;
43
44 skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
45 HCI_INIT_TIMEOUT);
46 if (IS_ERR(skb)) {
47 int err = PTR_ERR(skb);
48 bt_dev_err(hdev, "BCM: Reading device address failed (%d)", err);
49 return err;
50 }
51
52 if (skb->len != sizeof(*bda)) {
53 bt_dev_err(hdev, "BCM: Device address length mismatch");
54 kfree_skb(skb);
55 return -EIO;
56 }
57
58 bda = (struct hci_rp_read_bd_addr *)skb->data;
59
60 /* Check if the address indicates a controller with either an
61 * invalid or default address. In both cases the device needs
62 * to be marked as not having a valid address.
63 *
64 * The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
65 * with no configured address.
66 *
67 * The address 43:24:B3:00:00:00 indicates a BCM4324B3 controller
68 * with waiting for configuration state.
69 *
70 * The address 43:30:B1:00:00:00 indicates a BCM4330B1 controller
71 * with waiting for configuration state.
72 */
73 if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
74 !bacmp(&bda->bdaddr, BDADDR_BCM4324B3) ||
75 !bacmp(&bda->bdaddr, BDADDR_BCM4330B1)) {
76 bt_dev_info(hdev, "BCM: Using default device address (%pMR)",
77 &bda->bdaddr);
78 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
79 }
80
81 kfree_skb(skb);
82
83 return 0;
84 }
85 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
86
87 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
88 {
89 struct sk_buff *skb;
90 int err;
91
92 skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
93 if (IS_ERR(skb)) {
94 err = PTR_ERR(skb);
95 bt_dev_err(hdev, "BCM: Change address command failed (%d)", err);
96 return err;
97 }
98 kfree_skb(skb);
99
100 return 0;
101 }
102 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
103
104 int btbcm_patchram(struct hci_dev *hdev, const struct firmware *fw)
105 {
106 const struct hci_command_hdr *cmd;
107 const u8 *fw_ptr;
108 size_t fw_size;
109 struct sk_buff *skb;
110 u16 opcode;
111 int err = 0;
112
113 /* Start Download */
114 skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
115 if (IS_ERR(skb)) {
116 err = PTR_ERR(skb);
117 bt_dev_err(hdev, "BCM: Download Minidrv command failed (%d)",
118 err);
119 goto done;
120 }
121 kfree_skb(skb);
122
123 /* 50 msec delay after Download Minidrv completes */
124 msleep(50);
125
126 fw_ptr = fw->data;
127 fw_size = fw->size;
128
129 while (fw_size >= sizeof(*cmd)) {
130 const u8 *cmd_param;
131
132 cmd = (struct hci_command_hdr *)fw_ptr;
133 fw_ptr += sizeof(*cmd);
134 fw_size -= sizeof(*cmd);
135
136 if (fw_size < cmd->plen) {
137 bt_dev_err(hdev, "BCM: Patch is corrupted");
138 err = -EINVAL;
139 goto done;
140 }
141
142 cmd_param = fw_ptr;
143 fw_ptr += cmd->plen;
144 fw_size -= cmd->plen;
145
146 opcode = le16_to_cpu(cmd->opcode);
147
148 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
149 HCI_INIT_TIMEOUT);
150 if (IS_ERR(skb)) {
151 err = PTR_ERR(skb);
152 bt_dev_err(hdev, "BCM: Patch command %04x failed (%d)",
153 opcode, err);
154 goto done;
155 }
156 kfree_skb(skb);
157 }
158
159 /* 250 msec delay after Launch Ram completes */
160 msleep(250);
161
162 done:
163 return err;
164 }
165 EXPORT_SYMBOL(btbcm_patchram);
166
167 static int btbcm_reset(struct hci_dev *hdev)
168 {
169 struct sk_buff *skb;
170
171 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
172 if (IS_ERR(skb)) {
173 int err = PTR_ERR(skb);
174 bt_dev_err(hdev, "BCM: Reset failed (%d)", err);
175 return err;
176 }
177 kfree_skb(skb);
178
179 /* 100 msec delay for module to complete reset process */
180 msleep(100);
181
182 return 0;
183 }
184
185 static struct sk_buff *btbcm_read_local_name(struct hci_dev *hdev)
186 {
187 struct sk_buff *skb;
188
189 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL,
190 HCI_INIT_TIMEOUT);
191 if (IS_ERR(skb)) {
192 bt_dev_err(hdev, "BCM: Reading local name failed (%ld)",
193 PTR_ERR(skb));
194 return skb;
195 }
196
197 if (skb->len != sizeof(struct hci_rp_read_local_name)) {
198 bt_dev_err(hdev, "BCM: Local name length mismatch");
199 kfree_skb(skb);
200 return ERR_PTR(-EIO);
201 }
202
203 return skb;
204 }
205
206 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
207 {
208 struct sk_buff *skb;
209
210 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
211 HCI_INIT_TIMEOUT);
212 if (IS_ERR(skb)) {
213 bt_dev_err(hdev, "BCM: Reading local version info failed (%ld)",
214 PTR_ERR(skb));
215 return skb;
216 }
217
218 if (skb->len != sizeof(struct hci_rp_read_local_version)) {
219 bt_dev_err(hdev, "BCM: Local version length mismatch");
220 kfree_skb(skb);
221 return ERR_PTR(-EIO);
222 }
223
224 return skb;
225 }
226
227 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
228 {
229 struct sk_buff *skb;
230
231 skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
232 if (IS_ERR(skb)) {
233 bt_dev_err(hdev, "BCM: Read verbose config info failed (%ld)",
234 PTR_ERR(skb));
235 return skb;
236 }
237
238 if (skb->len != 7) {
239 bt_dev_err(hdev, "BCM: Verbose config length mismatch");
240 kfree_skb(skb);
241 return ERR_PTR(-EIO);
242 }
243
244 return skb;
245 }
246
247 static struct sk_buff *btbcm_read_controller_features(struct hci_dev *hdev)
248 {
249 struct sk_buff *skb;
250
251 skb = __hci_cmd_sync(hdev, 0xfc6e, 0, NULL, HCI_INIT_TIMEOUT);
252 if (IS_ERR(skb)) {
253 bt_dev_err(hdev, "BCM: Read controller features failed (%ld)",
254 PTR_ERR(skb));
255 return skb;
256 }
257
258 if (skb->len != 9) {
259 bt_dev_err(hdev, "BCM: Controller features length mismatch");
260 kfree_skb(skb);
261 return ERR_PTR(-EIO);
262 }
263
264 return skb;
265 }
266
267 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
268 {
269 struct sk_buff *skb;
270
271 skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
272 if (IS_ERR(skb)) {
273 bt_dev_err(hdev, "BCM: Read USB product info failed (%ld)",
274 PTR_ERR(skb));
275 return skb;
276 }
277
278 if (skb->len != 5) {
279 bt_dev_err(hdev, "BCM: USB product length mismatch");
280 kfree_skb(skb);
281 return ERR_PTR(-EIO);
282 }
283
284 return skb;
285 }
286
287 static int btbcm_read_info(struct hci_dev *hdev)
288 {
289 struct sk_buff *skb;
290
291 /* Read Verbose Config Version Info */
292 skb = btbcm_read_verbose_config(hdev);
293 if (IS_ERR(skb))
294 return PTR_ERR(skb);
295
296 bt_dev_info(hdev, "BCM: chip id %u", skb->data[1]);
297 kfree_skb(skb);
298
299 /* Read Controller Features */
300 skb = btbcm_read_controller_features(hdev);
301 if (IS_ERR(skb))
302 return PTR_ERR(skb);
303
304 bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
305 kfree_skb(skb);
306
307 /* Read Local Name */
308 skb = btbcm_read_local_name(hdev);
309 if (IS_ERR(skb))
310 return PTR_ERR(skb);
311
312 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
313 kfree_skb(skb);
314
315 return 0;
316 }
317
318 struct bcm_subver_table {
319 u16 subver;
320 const char *name;
321 };
322
323 static const struct bcm_subver_table bcm_uart_subver_table[] = {
324 { 0x4103, "BCM4330B1" }, /* 002.001.003 */
325 { 0x410e, "BCM43341B0" }, /* 002.001.014 */
326 { 0x4406, "BCM4324B3" }, /* 002.004.006 */
327 { 0x6109, "BCM4335C0" }, /* 003.001.009 */
328 { 0x610c, "BCM4354" }, /* 003.001.012 */
329 { 0x2122, "BCM4343A0" }, /* 001.001.034 */
330 { 0x2209, "BCM43430A1" }, /* 001.002.009 */
331 { 0x6119, "BCM4345C0" }, /* 003.001.025 */
332 { 0x230f, "BCM4356A2" }, /* 001.003.015 */
333 { }
334 };
335
336 static const struct bcm_subver_table bcm_usb_subver_table[] = {
337 { 0x210b, "BCM43142A0" }, /* 001.001.011 */
338 { 0x2112, "BCM4314A0" }, /* 001.001.018 */
339 { 0x2118, "BCM20702A0" }, /* 001.001.024 */
340 { 0x2126, "BCM4335A0" }, /* 001.001.038 */
341 { 0x220e, "BCM20702A1" }, /* 001.002.014 */
342 { 0x230f, "BCM4354A2" }, /* 001.003.015 */
343 { 0x4106, "BCM4335B0" }, /* 002.001.006 */
344 { 0x410e, "BCM20702B0" }, /* 002.001.014 */
345 { 0x6109, "BCM4335C0" }, /* 003.001.009 */
346 { 0x610c, "BCM4354" }, /* 003.001.012 */
347 { }
348 };
349
350 int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len,
351 bool reinit)
352 {
353 u16 subver, rev, pid, vid;
354 const char *hw_name = "BCM";
355 struct sk_buff *skb;
356 struct hci_rp_read_local_version *ver;
357 const struct bcm_subver_table *bcm_subver_table;
358 int i, err;
359
360 /* Reset */
361 err = btbcm_reset(hdev);
362 if (err)
363 return err;
364
365 /* Read Local Version Info */
366 skb = btbcm_read_local_version(hdev);
367 if (IS_ERR(skb))
368 return PTR_ERR(skb);
369
370 ver = (struct hci_rp_read_local_version *)skb->data;
371 rev = le16_to_cpu(ver->hci_rev);
372 subver = le16_to_cpu(ver->lmp_subver);
373 kfree_skb(skb);
374
375 /* Read controller information */
376 if (!reinit) {
377 err = btbcm_read_info(hdev);
378 if (err)
379 return err;
380 }
381
382 /* Upper nibble of rev should be between 0 and 3? */
383 if (((rev & 0xf000) >> 12) > 3)
384 return 0;
385
386 bcm_subver_table = (hdev->bus == HCI_USB) ? bcm_usb_subver_table :
387 bcm_uart_subver_table;
388
389 for (i = 0; bcm_subver_table[i].name; i++) {
390 if (subver == bcm_subver_table[i].subver) {
391 hw_name = bcm_subver_table[i].name;
392 break;
393 }
394 }
395
396 if (hdev->bus == HCI_USB) {
397 /* Read USB Product Info */
398 skb = btbcm_read_usb_product(hdev);
399 if (IS_ERR(skb))
400 return PTR_ERR(skb);
401
402 vid = get_unaligned_le16(skb->data + 1);
403 pid = get_unaligned_le16(skb->data + 3);
404 kfree_skb(skb);
405
406 snprintf(fw_name, len, "brcm/%s-%4.4x-%4.4x.hcd",
407 hw_name, vid, pid);
408 } else {
409 snprintf(fw_name, len, "brcm/%s.hcd", hw_name);
410 }
411
412 bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
413 hw_name, (subver & 0xe000) >> 13,
414 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
415
416 return 0;
417 }
418 EXPORT_SYMBOL_GPL(btbcm_initialize);
419
420 int btbcm_finalize(struct hci_dev *hdev)
421 {
422 char fw_name[64];
423 int err;
424
425 /* Re-initialize */
426 err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
427 if (err)
428 return err;
429
430 btbcm_check_bdaddr(hdev);
431
432 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
433
434 return 0;
435 }
436 EXPORT_SYMBOL_GPL(btbcm_finalize);
437
438 int btbcm_setup_patchram(struct hci_dev *hdev)
439 {
440 char fw_name[64];
441 const struct firmware *fw;
442 struct sk_buff *skb;
443 int err;
444
445 /* Initialize */
446 err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), false);
447 if (err)
448 return err;
449
450 err = request_firmware(&fw, fw_name, &hdev->dev);
451 if (err < 0) {
452 bt_dev_info(hdev, "BCM: Patch %s not found", fw_name);
453 goto done;
454 }
455
456 btbcm_patchram(hdev, fw);
457
458 release_firmware(fw);
459
460 /* Re-initialize */
461 err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
462 if (err)
463 return err;
464
465 /* Read Local Name */
466 skb = btbcm_read_local_name(hdev);
467 if (IS_ERR(skb))
468 return PTR_ERR(skb);
469
470 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
471 kfree_skb(skb);
472
473 done:
474 btbcm_check_bdaddr(hdev);
475
476 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
477
478 return 0;
479 }
480 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
481
482 int btbcm_setup_apple(struct hci_dev *hdev)
483 {
484 struct sk_buff *skb;
485 int err;
486
487 /* Reset */
488 err = btbcm_reset(hdev);
489 if (err)
490 return err;
491
492 /* Read Verbose Config Version Info */
493 skb = btbcm_read_verbose_config(hdev);
494 if (!IS_ERR(skb)) {
495 bt_dev_info(hdev, "BCM: chip id %u build %4.4u",
496 skb->data[1], get_unaligned_le16(skb->data + 5));
497 kfree_skb(skb);
498 }
499
500 /* Read USB Product Info */
501 skb = btbcm_read_usb_product(hdev);
502 if (!IS_ERR(skb)) {
503 bt_dev_info(hdev, "BCM: product %4.4x:%4.4x",
504 get_unaligned_le16(skb->data + 1),
505 get_unaligned_le16(skb->data + 3));
506 kfree_skb(skb);
507 }
508
509 /* Read Controller Features */
510 skb = btbcm_read_controller_features(hdev);
511 if (!IS_ERR(skb)) {
512 bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
513 kfree_skb(skb);
514 }
515
516 /* Read Local Name */
517 skb = btbcm_read_local_name(hdev);
518 if (!IS_ERR(skb)) {
519 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
520 kfree_skb(skb);
521 }
522
523 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
524
525 return 0;
526 }
527 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
528
529 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
530 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
531 MODULE_VERSION(VERSION);
532 MODULE_LICENSE("GPL");
Linux with added FPC-III support