1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2021 MediaTek Inc.
3 *
4 */
5 #include <linux/module.h>
6 #include <linux/firmware.h>
7 #include <linux/usb.h>
8 #include <linux/iopoll.h>
9 #include <linux/unaligned.h>
10
11 #include <net/bluetooth/bluetooth.h>
12 #include <net/bluetooth/hci_core.h>
13
14 #include "btmtk.h"
15
16 #define VERSION "0.1"
17
18 /* It is for mt79xx download rom patch*/
19 #define MTK_FW_ROM_PATCH_HEADER_SIZE 32
20 #define MTK_FW_ROM_PATCH_GD_SIZE 64
21 #define MTK_FW_ROM_PATCH_SEC_MAP_SIZE 64
22 #define MTK_SEC_MAP_COMMON_SIZE 12
23 #define MTK_SEC_MAP_NEED_SEND_SIZE 52
24
25 /* It is for mt79xx iso data transmission setting */
26 #define MTK_ISO_THRESHOLD 264
27
28 struct btmtk_patch_header {
29 u8 datetime[16];
30 u8 platform[4];
31 __le16 hwver;
32 __le16 swver;
33 __le32 magicnum;
34 } __packed;
35
36 struct btmtk_global_desc {
37 __le32 patch_ver;
38 __le32 sub_sys;
39 __le32 feature_opt;
40 __le32 section_num;
41 } __packed;
42
43 struct btmtk_section_map {
44 __le32 sectype;
45 __le32 secoffset;
46 __le32 secsize;
47 union {
48 __le32 u4SecSpec[13];
49 struct {
50 __le32 dlAddr;
51 __le32 dlsize;
52 __le32 seckeyidx;
53 __le32 alignlen;
54 __le32 sectype;
55 __le32 dlmodecrctype;
56 __le32 crc;
57 __le32 reserved[6];
58 } bin_info_spec;
59 };
60 } __packed;
61
btmtk_coredump(struct hci_dev * hdev)62 static void btmtk_coredump(struct hci_dev *hdev)
63 {
64 int err;
65
66 err = __hci_cmd_send(hdev, 0xfd5b, 0, NULL);
67 if (err < 0)
68 bt_dev_err(hdev, "Coredump failed (%d)", err);
69 }
70
btmtk_coredump_hdr(struct hci_dev * hdev,struct sk_buff * skb)71 static void btmtk_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb)
72 {
73 struct btmtk_data *data = hci_get_priv(hdev);
74 char buf[80];
75
76 snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n",
77 data->dev_id);
78 skb_put_data(skb, buf, strlen(buf));
79
80 snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
81 data->cd_info.fw_version);
82 skb_put_data(skb, buf, strlen(buf));
83
84 snprintf(buf, sizeof(buf), "Driver: %s\n",
85 data->cd_info.driver_name);
86 skb_put_data(skb, buf, strlen(buf));
87
88 snprintf(buf, sizeof(buf), "Vendor: MediaTek\n");
89 skb_put_data(skb, buf, strlen(buf));
90 }
91
btmtk_coredump_notify(struct hci_dev * hdev,int state)92 static void btmtk_coredump_notify(struct hci_dev *hdev, int state)
93 {
94 struct btmtk_data *data = hci_get_priv(hdev);
95
96 switch (state) {
97 case HCI_DEVCOREDUMP_IDLE:
98 data->cd_info.state = HCI_DEVCOREDUMP_IDLE;
99 break;
100 case HCI_DEVCOREDUMP_ACTIVE:
101 data->cd_info.state = HCI_DEVCOREDUMP_ACTIVE;
102 break;
103 case HCI_DEVCOREDUMP_TIMEOUT:
104 case HCI_DEVCOREDUMP_ABORT:
105 case HCI_DEVCOREDUMP_DONE:
106 data->cd_info.state = HCI_DEVCOREDUMP_IDLE;
107 btmtk_reset_sync(hdev);
108 break;
109 }
110 }
111
btmtk_fw_get_filename(char * buf,size_t size,u32 dev_id,u32 fw_ver,u32 fw_flavor)112 void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver,
113 u32 fw_flavor)
114 {
115 if (dev_id == 0x6639)
116 snprintf(buf, size,
117 "mediatek/mt7927/BT_RAM_CODE_MT%04x_2_%x_hdr.bin",
118 dev_id & 0xffff, (fw_ver & 0xff) + 1);
119 else if (dev_id == 0x7925)
120 snprintf(buf, size,
121 "mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
122 dev_id & 0xffff, dev_id & 0xffff, (fw_ver & 0xff) + 1);
123 else if (dev_id == 0x7961 && fw_flavor)
124 snprintf(buf, size,
125 "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin",
126 dev_id & 0xffff, (fw_ver & 0xff) + 1);
127 else
128 snprintf(buf, size,
129 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
130 dev_id & 0xffff, (fw_ver & 0xff) + 1);
131 }
132 EXPORT_SYMBOL_GPL(btmtk_fw_get_filename);
133
btmtk_setup_firmware_79xx(struct hci_dev * hdev,const char * fwname,wmt_cmd_sync_func_t wmt_cmd_sync,u32 dev_id)134 int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname,
135 wmt_cmd_sync_func_t wmt_cmd_sync,
136 u32 dev_id)
137 {
138 struct btmtk_hci_wmt_params wmt_params;
139 struct btmtk_patch_header *hdr;
140 struct btmtk_global_desc *globaldesc = NULL;
141 struct btmtk_section_map *sectionmap;
142 const struct firmware *fw;
143 const u8 *fw_ptr;
144 const u8 *fw_bin_ptr;
145 int err, dlen, i, status;
146 u8 flag, first_block, retry;
147 u32 section_num, dl_size, section_offset;
148 u8 cmd[64];
149
150 err = request_firmware(&fw, fwname, &hdev->dev);
151 if (err < 0) {
152 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
153 return err;
154 }
155
156 fw_ptr = fw->data;
157 fw_bin_ptr = fw_ptr;
158 hdr = (struct btmtk_patch_header *)fw_ptr;
159 globaldesc = (struct btmtk_global_desc *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE);
160 section_num = le32_to_cpu(globaldesc->section_num);
161
162 bt_dev_info(hdev, "HW/SW Version: 0x%04x%04x, Build Time: %s",
163 le16_to_cpu(hdr->hwver), le16_to_cpu(hdr->swver), hdr->datetime);
164
165 for (i = 0; i < section_num; i++) {
166 first_block = 1;
167 fw_ptr = fw_bin_ptr;
168 sectionmap = (struct btmtk_section_map *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE +
169 MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i);
170
171 section_offset = le32_to_cpu(sectionmap->secoffset);
172 dl_size = le32_to_cpu(sectionmap->bin_info_spec.dlsize);
173
174 /* MT6639: only download sections where dlmode byte0 == 0x01,
175 * matching the Windows driver behavior which skips WiFi/other
176 * sections that would cause the chip to hang.
177 */
178 if (dev_id == 0x6639 && dl_size > 0 &&
179 (le32_to_cpu(sectionmap->bin_info_spec.dlmodecrctype) & 0xff) != 0x01)
180 continue;
181
182 if (dl_size > 0) {
183 retry = 20;
184 while (retry > 0) {
185 cmd[0] = 0; /* 0 means legacy dl mode. */
186 memcpy(cmd + 1,
187 fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE +
188 MTK_FW_ROM_PATCH_GD_SIZE +
189 MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i +
190 MTK_SEC_MAP_COMMON_SIZE,
191 MTK_SEC_MAP_NEED_SEND_SIZE + 1);
192
193 wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
194 wmt_params.status = &status;
195 wmt_params.flag = 0;
196 wmt_params.dlen = MTK_SEC_MAP_NEED_SEND_SIZE + 1;
197 wmt_params.data = &cmd;
198
199 err = wmt_cmd_sync(hdev, &wmt_params);
200 if (err < 0) {
201 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
202 err);
203 goto err_release_fw;
204 }
205
206 if (status == BTMTK_WMT_PATCH_UNDONE) {
207 break;
208 } else if (status == BTMTK_WMT_PATCH_PROGRESS) {
209 msleep(100);
210 retry--;
211 } else if (status == BTMTK_WMT_PATCH_DONE) {
212 goto next_section;
213 } else {
214 bt_dev_err(hdev, "Failed wmt patch dwnld status (%d)",
215 status);
216 err = -EIO;
217 goto err_release_fw;
218 }
219 }
220
221 /* If retry exhausted goto err_release_fw */
222 if (retry == 0) {
223 err = -EIO;
224 goto err_release_fw;
225 }
226
227 fw_ptr += section_offset;
228 wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
229
230 while (dl_size > 0) {
231 dlen = min_t(int, 250, dl_size);
232 if (first_block == 1) {
233 flag = 1;
234 first_block = 0;
235 } else if (dl_size - dlen <= 0) {
236 flag = 3;
237 } else {
238 flag = 2;
239 }
240
241 wmt_params.flag = flag;
242 wmt_params.dlen = dlen;
243 wmt_params.data = fw_ptr;
244
245 err = wmt_cmd_sync(hdev, &wmt_params);
246 /* Status BTMTK_WMT_PATCH_PROGRESS indicates firmware is
247 * in process of being downloaded, which is not expected to
248 * occur here.
249 */
250 if (status == BTMTK_WMT_PATCH_PROGRESS) {
251 err = -EIO;
252 goto err_release_fw;
253 } else if (err < 0) {
254 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
255 err);
256 goto err_release_fw;
257 }
258
259 dl_size -= dlen;
260 fw_ptr += dlen;
261 }
262 }
263 next_section:
264 continue;
265 }
266 /* Wait a few moments for firmware activation done */
267 usleep_range(100000, 120000);
268
269 err_release_fw:
270 release_firmware(fw);
271
272 return err;
273 }
274 EXPORT_SYMBOL_GPL(btmtk_setup_firmware_79xx);
275
btmtk_setup_firmware(struct hci_dev * hdev,const char * fwname,wmt_cmd_sync_func_t wmt_cmd_sync)276 int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname,
277 wmt_cmd_sync_func_t wmt_cmd_sync)
278 {
279 struct btmtk_hci_wmt_params wmt_params;
280 const struct firmware *fw;
281 const u8 *fw_ptr;
282 size_t fw_size;
283 int err, dlen;
284 u8 flag, param;
285
286 err = request_firmware(&fw, fwname, &hdev->dev);
287 if (err < 0) {
288 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
289 return err;
290 }
291
292 /* Power on data RAM the firmware relies on. */
293 param = 1;
294 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
295 wmt_params.flag = 3;
296 wmt_params.dlen = sizeof(param);
297 wmt_params.data = ¶m;
298 wmt_params.status = NULL;
299
300 err = wmt_cmd_sync(hdev, &wmt_params);
301 if (err < 0) {
302 bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);
303 goto err_release_fw;
304 }
305
306 fw_ptr = fw->data;
307 fw_size = fw->size;
308
309 /* The size of patch header is 30 bytes, should be skip */
310 if (fw_size < 30) {
311 err = -EINVAL;
312 goto err_release_fw;
313 }
314
315 fw_size -= 30;
316 fw_ptr += 30;
317 flag = 1;
318
319 wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
320 wmt_params.status = NULL;
321
322 while (fw_size > 0) {
323 dlen = min_t(int, 250, fw_size);
324
325 /* Tell device the position in sequence */
326 if (fw_size - dlen <= 0)
327 flag = 3;
328 else if (fw_size < fw->size - 30)
329 flag = 2;
330
331 wmt_params.flag = flag;
332 wmt_params.dlen = dlen;
333 wmt_params.data = fw_ptr;
334
335 err = wmt_cmd_sync(hdev, &wmt_params);
336 if (err < 0) {
337 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
338 err);
339 goto err_release_fw;
340 }
341
342 fw_size -= dlen;
343 fw_ptr += dlen;
344 }
345
346 wmt_params.op = BTMTK_WMT_RST;
347 wmt_params.flag = 4;
348 wmt_params.dlen = 0;
349 wmt_params.data = NULL;
350 wmt_params.status = NULL;
351
352 /* Activate function the firmware providing to */
353 err = wmt_cmd_sync(hdev, &wmt_params);
354 if (err < 0) {
355 bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
356 goto err_release_fw;
357 }
358
359 /* Wait a few moments for firmware activation done */
360 usleep_range(10000, 12000);
361
362 err_release_fw:
363 release_firmware(fw);
364
365 return err;
366 }
367 EXPORT_SYMBOL_GPL(btmtk_setup_firmware);
368
btmtk_set_bdaddr(struct hci_dev * hdev,const bdaddr_t * bdaddr)369 int btmtk_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
370 {
371 struct sk_buff *skb;
372 long ret;
373
374 skb = __hci_cmd_sync(hdev, 0xfc1a, 6, bdaddr, HCI_INIT_TIMEOUT);
375 if (IS_ERR(skb)) {
376 ret = PTR_ERR(skb);
377 bt_dev_err(hdev, "changing Mediatek device address failed (%ld)",
378 ret);
379 return ret;
380 }
381 kfree_skb(skb);
382
383 return 0;
384 }
385 EXPORT_SYMBOL_GPL(btmtk_set_bdaddr);
386
btmtk_reset_sync(struct hci_dev * hdev)387 void btmtk_reset_sync(struct hci_dev *hdev)
388 {
389 struct btmtk_data *reset_work = hci_get_priv(hdev);
390 int err;
391
392 hci_dev_lock(hdev);
393
394 err = hci_cmd_sync_queue(hdev, reset_work->reset_sync, NULL, NULL);
395 if (err)
396 bt_dev_err(hdev, "failed to reset (%d)", err);
397
398 hci_dev_unlock(hdev);
399 }
400 EXPORT_SYMBOL_GPL(btmtk_reset_sync);
401
btmtk_register_coredump(struct hci_dev * hdev,const char * name,u32 fw_version)402 int btmtk_register_coredump(struct hci_dev *hdev, const char *name,
403 u32 fw_version)
404 {
405 struct btmtk_data *data = hci_get_priv(hdev);
406
407 if (!IS_ENABLED(CONFIG_DEV_COREDUMP))
408 return -EOPNOTSUPP;
409
410 data->cd_info.fw_version = fw_version;
411 data->cd_info.state = HCI_DEVCOREDUMP_IDLE;
412 data->cd_info.driver_name = name;
413
414 return hci_devcd_register(hdev, btmtk_coredump, btmtk_coredump_hdr,
415 btmtk_coredump_notify);
416 }
417 EXPORT_SYMBOL_GPL(btmtk_register_coredump);
418
btmtk_process_coredump(struct hci_dev * hdev,struct sk_buff * skb)419 int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
420 {
421 struct btmtk_data *data = hci_get_priv(hdev);
422 int err;
423 bool complete = false;
424
425 if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) {
426 kfree_skb(skb);
427 return 0;
428 }
429
430 switch (data->cd_info.state) {
431 case HCI_DEVCOREDUMP_IDLE:
432 err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE);
433 if (err < 0) {
434 kfree_skb(skb);
435 break;
436 }
437 data->cd_info.cnt = 0;
438
439 /* It is supposed coredump can be done within 5 seconds */
440 schedule_delayed_work(&hdev->dump.dump_timeout,
441 msecs_to_jiffies(5000));
442 fallthrough;
443 case HCI_DEVCOREDUMP_ACTIVE:
444 default:
445 /* Mediatek coredump data would be more than MTK_COREDUMP_NUM */
446 if (data->cd_info.cnt >= MTK_COREDUMP_NUM &&
447 skb->len > MTK_COREDUMP_END_LEN)
448 if (!memcmp((char *)&skb->data[skb->len - MTK_COREDUMP_END_LEN],
449 MTK_COREDUMP_END, MTK_COREDUMP_END_LEN - 1))
450 complete = true;
451
452 err = hci_devcd_append(hdev, skb);
453 if (err < 0)
454 break;
455 data->cd_info.cnt++;
456
457 if (complete) {
458 bt_dev_info(hdev, "Mediatek coredump end");
459 hci_devcd_complete(hdev);
460 }
461
462 break;
463 }
464
465 return err;
466 }
467 EXPORT_SYMBOL_GPL(btmtk_process_coredump);
468
469 #if IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK)
470 /* Known MT6639 (MT7927) Bluetooth USB devices.
471 * Used to scope the zero-CHIPID workaround to real MT6639 hardware,
472 * since some boards return 0x0000 from the MMIO chip ID register.
473 */
474 static const struct {
475 u16 vendor;
476 u16 product;
477 } btmtk_mt6639_devs[] = {
478 { 0x0489, 0xe13a }, /* ASUS ROG Crosshair X870E Hero */
479 { 0x0489, 0xe0fa }, /* Lenovo Legion Pro 7 16ARX9 */
480 { 0x0489, 0xe10f }, /* Gigabyte Z790 AORUS MASTER X */
481 { 0x0489, 0xe110 }, /* MSI X870E Ace Max */
482 { 0x0489, 0xe116 }, /* TP-Link Archer TBE550E */
483 { 0x13d3, 0x3588 }, /* ASUS ROG STRIX X870E-E */
484 };
485
btmtk_usb_wmt_recv(struct urb * urb)486 static void btmtk_usb_wmt_recv(struct urb *urb)
487 {
488 struct hci_dev *hdev = urb->context;
489 struct btmtk_data *data = hci_get_priv(hdev);
490 struct sk_buff *skb;
491 int err;
492
493 if (urb->status == 0 && urb->actual_length > 0) {
494 hdev->stat.byte_rx += urb->actual_length;
495
496 /* WMT event shouldn't be fragmented and the size should be
497 * less than HCI_WMT_MAX_EVENT_SIZE.
498 */
499 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
500 if (!skb) {
501 hdev->stat.err_rx++;
502 kfree(urb->setup_packet);
503 return;
504 }
505
506 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
507 skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
508
509 /* When someone waits for the WMT event, the skb is being cloned
510 * and being processed the events from there then.
511 */
512 if (test_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) {
513 data->evt_skb = skb_clone(skb, GFP_ATOMIC);
514 if (!data->evt_skb) {
515 kfree_skb(skb);
516 kfree(urb->setup_packet);
517 return;
518 }
519 }
520
521 err = hci_recv_frame(hdev, skb);
522 if (err < 0) {
523 kfree_skb(data->evt_skb);
524 data->evt_skb = NULL;
525 kfree(urb->setup_packet);
526 return;
527 }
528
529 if (test_and_clear_bit(BTMTK_TX_WAIT_VND_EVT,
530 &data->flags)) {
531 /* Barrier to sync with other CPUs */
532 smp_mb__after_atomic();
533 wake_up_bit(&data->flags,
534 BTMTK_TX_WAIT_VND_EVT);
535 }
536 kfree(urb->setup_packet);
537 return;
538 } else if (urb->status == -ENOENT) {
539 /* Avoid suspend failed when usb_kill_urb */
540 return;
541 }
542
543 usb_mark_last_busy(data->udev);
544
545 /* The URB complete handler is still called with urb->actual_length = 0
546 * when the event is not available, so we should keep re-submitting
547 * URB until WMT event returns, Also, It's necessary to wait some time
548 * between the two consecutive control URBs to relax the target device
549 * to generate the event. Otherwise, the WMT event cannot return from
550 * the device successfully.
551 */
552 udelay(500);
553
554 usb_anchor_urb(urb, data->ctrl_anchor);
555 err = usb_submit_urb(urb, GFP_ATOMIC);
556 if (err < 0) {
557 kfree(urb->setup_packet);
558 /* -EPERM: urb is being killed;
559 * -ENODEV: device got disconnected
560 */
561 if (err != -EPERM && err != -ENODEV)
562 bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
563 urb, -err);
564 usb_unanchor_urb(urb);
565 }
566 }
567
btmtk_usb_submit_wmt_recv_urb(struct hci_dev * hdev)568 static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev)
569 {
570 struct btmtk_data *data = hci_get_priv(hdev);
571 struct usb_ctrlrequest *dr;
572 unsigned char *buf;
573 int err, size = 64;
574 unsigned int pipe;
575 struct urb *urb;
576
577 urb = usb_alloc_urb(0, GFP_KERNEL);
578 if (!urb)
579 return -ENOMEM;
580
581 dr = kmalloc_obj(*dr);
582 if (!dr) {
583 usb_free_urb(urb);
584 return -ENOMEM;
585 }
586
587 dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
588 dr->bRequest = 1;
589 dr->wIndex = cpu_to_le16(0);
590 dr->wValue = cpu_to_le16(48);
591 dr->wLength = cpu_to_le16(size);
592
593 buf = kmalloc(size, GFP_KERNEL);
594 if (!buf) {
595 kfree(dr);
596 usb_free_urb(urb);
597 return -ENOMEM;
598 }
599
600 pipe = usb_rcvctrlpipe(data->udev, 0);
601
602 usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
603 buf, size, btmtk_usb_wmt_recv, hdev);
604
605 urb->transfer_flags |= URB_FREE_BUFFER;
606
607 usb_anchor_urb(urb, data->ctrl_anchor);
608 err = usb_submit_urb(urb, GFP_KERNEL);
609 if (err < 0) {
610 if (err != -EPERM && err != -ENODEV)
611 bt_dev_err(hdev, "urb %p submission failed (%d)",
612 urb, -err);
613 usb_unanchor_urb(urb);
614 }
615
616 usb_free_urb(urb);
617
618 return err;
619 }
620
btmtk_usb_hci_wmt_sync(struct hci_dev * hdev,struct btmtk_hci_wmt_params * wmt_params)621 static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
622 struct btmtk_hci_wmt_params *wmt_params)
623 {
624 struct btmtk_data *data = hci_get_priv(hdev);
625 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
626 u32 hlen, status = BTMTK_WMT_INVALID;
627 struct btmtk_hci_wmt_evt *wmt_evt;
628 struct btmtk_hci_wmt_cmd *wc;
629 struct btmtk_wmt_hdr *hdr;
630 int err;
631
632 /* Send the WMT command and wait until the WMT event returns */
633 hlen = sizeof(*hdr) + wmt_params->dlen;
634 if (hlen > 255)
635 return -EINVAL;
636
637 wc = kzalloc(hlen, GFP_KERNEL);
638 if (!wc)
639 return -ENOMEM;
640
641 hdr = &wc->hdr;
642 hdr->dir = 1;
643 hdr->op = wmt_params->op;
644 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
645 hdr->flag = wmt_params->flag;
646 memcpy(wc->data, wmt_params->data, wmt_params->dlen);
647
648 set_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
649
650 /* WMT cmd/event doesn't follow up the generic HCI cmd/event handling,
651 * it needs constantly polling control pipe until the host received the
652 * WMT event, thus, we should require to specifically acquire PM counter
653 * on the USB to prevent the interface from entering auto suspended
654 * while WMT cmd/event in progress.
655 */
656 err = usb_autopm_get_interface(data->intf);
657 if (err < 0)
658 goto err_free_wc;
659
660 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
661
662 if (err < 0) {
663 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
664 usb_autopm_put_interface(data->intf);
665 goto err_free_wc;
666 }
667
668 /* Submit control IN URB on demand to process the WMT event */
669 err = btmtk_usb_submit_wmt_recv_urb(hdev);
670
671 usb_autopm_put_interface(data->intf);
672
673 if (err < 0)
674 goto err_free_wc;
675
676 /* The vendor specific WMT commands are all answered by a vendor
677 * specific event and will have the Command Status or Command
678 * Complete as with usual HCI command flow control.
679 *
680 * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
681 * state to be cleared. The driver specific event receive routine
682 * will clear that state and with that indicate completion of the
683 * WMT command.
684 */
685 err = wait_on_bit_timeout(&data->flags, BTMTK_TX_WAIT_VND_EVT,
686 TASK_UNINTERRUPTIBLE, HCI_INIT_TIMEOUT);
687
688 if (err) {
689 bt_dev_err(hdev, "Execution of wmt command timed out");
690 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
691 err = -ETIMEDOUT;
692 goto err_free_wc;
693 }
694
695 if (data->evt_skb == NULL)
696 goto err_free_wc;
697
698 wmt_evt = skb_pull_data(data->evt_skb, sizeof(*wmt_evt));
699 if (!wmt_evt) {
700 bt_dev_err(hdev, "WMT event too short (%u bytes)",
701 data->evt_skb->len);
702 err = -EINVAL;
703 goto err_free_skb;
704 }
705 if (wmt_evt->whdr.op != hdr->op) {
706 bt_dev_err(hdev, "Wrong op received %d expected %d",
707 wmt_evt->whdr.op, hdr->op);
708 err = -EIO;
709 goto err_free_skb;
710 }
711
712 switch (wmt_evt->whdr.op) {
713 case BTMTK_WMT_SEMAPHORE:
714 if (wmt_evt->whdr.flag == 2)
715 status = BTMTK_WMT_PATCH_UNDONE;
716 else
717 status = BTMTK_WMT_PATCH_DONE;
718 break;
719 case BTMTK_WMT_FUNC_CTRL:
720 if (!skb_pull_data(data->evt_skb,
721 sizeof(wmt_evt_funcc->status))) {
722 err = -EINVAL;
723 goto err_free_skb;
724 }
725
726 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
727 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
728 status = BTMTK_WMT_ON_DONE;
729 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
730 status = BTMTK_WMT_ON_PROGRESS;
731 else
732 status = BTMTK_WMT_ON_UNDONE;
733 break;
734 case BTMTK_WMT_PATCH_DWNLD:
735 if (wmt_evt->whdr.flag == 2)
736 status = BTMTK_WMT_PATCH_DONE;
737 else if (wmt_evt->whdr.flag == 1)
738 status = BTMTK_WMT_PATCH_PROGRESS;
739 else
740 status = BTMTK_WMT_PATCH_UNDONE;
741 break;
742 }
743
744 if (wmt_params->status)
745 *wmt_params->status = status;
746
747 err_free_skb:
748 kfree_skb(data->evt_skb);
749 data->evt_skb = NULL;
750 err_free_wc:
751 kfree(wc);
752 return err;
753 }
754
btmtk_usb_func_query(struct hci_dev * hdev)755 static int btmtk_usb_func_query(struct hci_dev *hdev)
756 {
757 struct btmtk_hci_wmt_params wmt_params;
758 int status, err;
759 u8 param = 0;
760
761 /* Query whether the function is enabled */
762 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
763 wmt_params.flag = 4;
764 wmt_params.dlen = sizeof(param);
765 wmt_params.data = ¶m;
766 wmt_params.status = &status;
767
768 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
769 if (err < 0) {
770 bt_dev_err(hdev, "Failed to query function status (%d)", err);
771 return err;
772 }
773
774 return status;
775 }
776
btmtk_usb_uhw_reg_write(struct hci_dev * hdev,u32 reg,u32 val)777 static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val)
778 {
779 struct btmtk_data *data = hci_get_priv(hdev);
780 int pipe, err;
781 void *buf;
782
783 buf = kzalloc(4, GFP_KERNEL);
784 if (!buf)
785 return -ENOMEM;
786
787 put_unaligned_le32(val, buf);
788
789 pipe = usb_sndctrlpipe(data->udev, 0);
790 err = usb_control_msg(data->udev, pipe, 0x02,
791 0x5E,
792 reg >> 16, reg & 0xffff,
793 buf, 4, USB_CTRL_SET_TIMEOUT);
794 if (err < 0)
795 bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
796
797 kfree(buf);
798
799 return err;
800 }
801
btmtk_usb_uhw_reg_read(struct hci_dev * hdev,u32 reg,u32 * val)802 static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
803 {
804 struct btmtk_data *data = hci_get_priv(hdev);
805 int pipe, err;
806 void *buf;
807
808 buf = kzalloc(4, GFP_KERNEL);
809 if (!buf)
810 return -ENOMEM;
811
812 pipe = usb_rcvctrlpipe(data->udev, 0);
813 err = usb_control_msg(data->udev, pipe, 0x01,
814 0xDE,
815 reg >> 16, reg & 0xffff,
816 buf, 4, USB_CTRL_GET_TIMEOUT);
817 if (err < 0) {
818 bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
819 goto err_free_buf;
820 }
821
822 *val = get_unaligned_le32(buf);
823 bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
824
825 err_free_buf:
826 kfree(buf);
827
828 return err;
829 }
830
btmtk_usb_reg_read(struct hci_dev * hdev,u32 reg,u32 * val)831 static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
832 {
833 struct btmtk_data *data = hci_get_priv(hdev);
834 int pipe, err, size = sizeof(u32);
835 void *buf;
836
837 buf = kzalloc(size, GFP_KERNEL);
838 if (!buf)
839 return -ENOMEM;
840
841 pipe = usb_rcvctrlpipe(data->udev, 0);
842 err = usb_control_msg(data->udev, pipe, 0x63,
843 USB_TYPE_VENDOR | USB_DIR_IN,
844 reg >> 16, reg & 0xffff,
845 buf, size, USB_CTRL_GET_TIMEOUT);
846 if (err < 0)
847 goto err_free_buf;
848
849 *val = get_unaligned_le32(buf);
850
851 err_free_buf:
852 kfree(buf);
853
854 return err;
855 }
856
btmtk_usb_id_get(struct hci_dev * hdev,u32 reg,u32 * id)857 static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id)
858 {
859 return btmtk_usb_reg_read(hdev, reg, id);
860 }
861
btmtk_usb_reset_done(struct hci_dev * hdev)862 static u32 btmtk_usb_reset_done(struct hci_dev *hdev)
863 {
864 u32 val = 0;
865
866 btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val);
867
868 return val & MTK_BT_RST_DONE;
869 }
870
btmtk_usb_subsys_reset(struct hci_dev * hdev,u32 dev_id)871 int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
872 {
873 u32 val;
874 int err;
875
876 if (dev_id == 0x7922) {
877 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
878 if (err < 0)
879 return err;
880 val |= 0x00002020;
881 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
882 if (err < 0)
883 return err;
884 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
885 if (err < 0)
886 return err;
887 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
888 if (err < 0)
889 return err;
890 val |= BIT(0);
891 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
892 if (err < 0)
893 return err;
894 msleep(100);
895 } else if (dev_id == 0x7925 || dev_id == 0x6639) {
896 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
897 if (err < 0)
898 return err;
899 val |= (1 << 5);
900 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
901 if (err < 0)
902 return err;
903 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
904 if (err < 0)
905 return err;
906 val &= 0xFFFF00FF;
907 val |= (1 << 13);
908 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
909 if (err < 0)
910 return err;
911 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
912 if (err < 0)
913 return err;
914 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
915 if (err < 0)
916 return err;
917 val |= (1 << 0);
918 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
919 if (err < 0)
920 return err;
921 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
922 if (err < 0)
923 return err;
924 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
925 if (err < 0)
926 return err;
927 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
928 if (err < 0)
929 return err;
930 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
931 if (err < 0)
932 return err;
933 msleep(100);
934 } else {
935 /* It's Device EndPoint Reset Option Register */
936 bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
937 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
938 if (err < 0)
939 return err;
940 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val);
941 if (err < 0)
942 return err;
943 /* Reset the bluetooth chip via USB interface. */
944 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1);
945 if (err < 0)
946 return err;
947 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
948 if (err < 0)
949 return err;
950 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
951 if (err < 0)
952 return err;
953 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
954 if (err < 0)
955 return err;
956 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
957 if (err < 0)
958 return err;
959 /* MT7921 need to delay 20ms between toggle reset bit */
960 msleep(20);
961 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0);
962 if (err < 0)
963 return err;
964 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
965 if (err < 0)
966 return err;
967 }
968
969 err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val,
970 val & MTK_BT_RST_DONE, 20000, 1000000);
971 if (err < 0)
972 bt_dev_err(hdev, "Reset timeout");
973
974 if (dev_id == 0x7922) {
975 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
976 if (err < 0)
977 return err;
978 }
979
980 err = btmtk_usb_id_get(hdev, 0x70010200, &val);
981 if (err < 0 || (!val && dev_id != 0x6639))
982 bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
983
984 return err;
985 }
986 EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset);
987
btmtk_usb_recv_acl(struct hci_dev * hdev,struct sk_buff * skb)988 int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
989 {
990 struct btmtk_data *data = hci_get_priv(hdev);
991 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
992
993 switch (handle) {
994 case 0xfc6f: /* Firmware dump from device */
995 /* When the firmware hangs, the device can no longer
996 * suspend and thus disable auto-suspend.
997 */
998 usb_disable_autosuspend(data->udev);
999
1000 /* We need to forward the diagnostic packet to userspace daemon
1001 * for backward compatibility, so we have to clone the packet
1002 * extraly for the in-kernel coredump support.
1003 */
1004 if (IS_ENABLED(CONFIG_DEV_COREDUMP)) {
1005 struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC);
1006
1007 if (skb_cd)
1008 btmtk_process_coredump(hdev, skb_cd);
1009 }
1010
1011 fallthrough;
1012 case 0x05ff: /* Firmware debug logging 1 */
1013 case 0x05fe: /* Firmware debug logging 2 */
1014 return hci_recv_diag(hdev, skb);
1015 }
1016
1017 return hci_recv_frame(hdev, skb);
1018 }
1019 EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
1020
btmtk_isopkt_pad(struct hci_dev * hdev,struct sk_buff * skb)1021 static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb)
1022 {
1023 if (skb->len > MTK_ISO_THRESHOLD)
1024 return -EINVAL;
1025
1026 if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len))
1027 return -ENOMEM;
1028
1029 __skb_put(skb, MTK_ISO_THRESHOLD - skb->len);
1030
1031 return 0;
1032 }
1033
__set_mtk_intr_interface(struct hci_dev * hdev)1034 static int __set_mtk_intr_interface(struct hci_dev *hdev)
1035 {
1036 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1037 struct usb_interface *intf = btmtk_data->isopkt_intf;
1038 int err;
1039
1040 if (!btmtk_data->isopkt_intf)
1041 return -ENODEV;
1042
1043 err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM,
1044 (intf->num_altsetting > 1) ? 1 : 0);
1045 if (err < 0) {
1046 bt_dev_err(hdev, "setting interface failed (%d)", -err);
1047 return err;
1048 }
1049
1050 err = usb_find_common_endpoints(intf->cur_altsetting, NULL, NULL,
1051 &btmtk_data->isopkt_rx_ep,
1052 &btmtk_data->isopkt_tx_ep);
1053 if (err) {
1054 bt_dev_err(hdev, "invalid interrupt descriptors");
1055 return -ENODEV;
1056 }
1057
1058 return 0;
1059 }
1060
alloc_mtk_intr_urb(struct hci_dev * hdev,struct sk_buff * skb,usb_complete_t tx_complete)1061 struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
1062 usb_complete_t tx_complete)
1063 {
1064 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1065 struct urb *urb;
1066 unsigned int pipe;
1067
1068 if (!btmtk_data->isopkt_tx_ep)
1069 return ERR_PTR(-ENODEV);
1070
1071 urb = usb_alloc_urb(0, GFP_KERNEL);
1072 if (!urb)
1073 return ERR_PTR(-ENOMEM);
1074
1075 if (btmtk_isopkt_pad(hdev, skb))
1076 return ERR_PTR(-EINVAL);
1077
1078 pipe = usb_sndintpipe(btmtk_data->udev,
1079 btmtk_data->isopkt_tx_ep->bEndpointAddress);
1080
1081 usb_fill_int_urb(urb, btmtk_data->udev, pipe,
1082 skb->data, skb->len, tx_complete,
1083 skb, btmtk_data->isopkt_tx_ep->bInterval);
1084
1085 skb->dev = (void *)hdev;
1086
1087 return urb;
1088 }
1089 EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb);
1090
btmtk_recv_isopkt(struct hci_dev * hdev,void * buffer,int count)1091 static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count)
1092 {
1093 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1094 struct sk_buff *skb;
1095 unsigned long flags;
1096 int err = 0;
1097
1098 spin_lock_irqsave(&btmtk_data->isorxlock, flags);
1099 skb = btmtk_data->isopkt_skb;
1100
1101 while (count) {
1102 int len;
1103
1104 if (!skb) {
1105 skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC);
1106 if (!skb) {
1107 err = -ENOMEM;
1108 break;
1109 }
1110
1111 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
1112 hci_skb_expect(skb) = HCI_ISO_HDR_SIZE;
1113 }
1114
1115 len = min_t(uint, hci_skb_expect(skb), count);
1116 skb_put_data(skb, buffer, len);
1117
1118 count -= len;
1119 buffer += len;
1120 hci_skb_expect(skb) -= len;
1121
1122 if (skb->len == HCI_ISO_HDR_SIZE) {
1123 __le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen;
1124
1125 /* Complete ISO header */
1126 hci_skb_expect(skb) = __le16_to_cpu(dlen);
1127
1128 if (skb_tailroom(skb) < hci_skb_expect(skb)) {
1129 kfree_skb(skb);
1130 skb = NULL;
1131
1132 err = -EILSEQ;
1133 break;
1134 }
1135 }
1136
1137 if (!hci_skb_expect(skb)) {
1138 /* Complete frame */
1139 hci_recv_frame(hdev, skb);
1140 skb = NULL;
1141 }
1142 }
1143
1144 btmtk_data->isopkt_skb = skb;
1145 spin_unlock_irqrestore(&btmtk_data->isorxlock, flags);
1146
1147 return err;
1148 }
1149
btmtk_intr_complete(struct urb * urb)1150 static void btmtk_intr_complete(struct urb *urb)
1151 {
1152 struct hci_dev *hdev = urb->context;
1153 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1154 int err;
1155
1156 BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1157 urb->actual_length);
1158
1159 if (!test_bit(HCI_RUNNING, &hdev->flags))
1160 return;
1161
1162 if (hdev->suspended)
1163 return;
1164
1165 if (urb->status == 0) {
1166 hdev->stat.byte_rx += urb->actual_length;
1167
1168 if (btmtk_recv_isopkt(hdev, urb->transfer_buffer,
1169 urb->actual_length) < 0) {
1170 bt_dev_err(hdev, "corrupted iso packet");
1171 hdev->stat.err_rx++;
1172 }
1173 } else if (urb->status == -ENOENT) {
1174 /* Avoid suspend failed when usb_kill_urb */
1175 return;
1176 }
1177
1178 usb_mark_last_busy(btmtk_data->udev);
1179 usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
1180
1181 err = usb_submit_urb(urb, GFP_ATOMIC);
1182 if (err < 0) {
1183 /* -EPERM: urb is being killed;
1184 * -ENODEV: device got disconnected
1185 */
1186 if (err != -EPERM && err != -ENODEV)
1187 bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1188 urb, -err);
1189 if (err != -EPERM)
1190 hci_cmd_sync_cancel(hdev, -err);
1191 usb_unanchor_urb(urb);
1192 }
1193 }
1194
btmtk_submit_intr_urb(struct hci_dev * hdev,gfp_t mem_flags)1195 static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
1196 {
1197 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1198 unsigned char *buf;
1199 unsigned int pipe;
1200 struct urb *urb;
1201 int err, size;
1202
1203 BT_DBG("%s", hdev->name);
1204
1205 if (!btmtk_data->isopkt_rx_ep)
1206 return -ENODEV;
1207
1208 urb = usb_alloc_urb(0, mem_flags);
1209 if (!urb)
1210 return -ENOMEM;
1211 size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize);
1212
1213 buf = kmalloc(size, mem_flags);
1214 if (!buf) {
1215 usb_free_urb(urb);
1216 return -ENOMEM;
1217 }
1218
1219 pipe = usb_rcvintpipe(btmtk_data->udev,
1220 btmtk_data->isopkt_rx_ep->bEndpointAddress);
1221
1222 usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size,
1223 btmtk_intr_complete, hdev,
1224 btmtk_data->isopkt_rx_ep->bInterval);
1225
1226 urb->transfer_flags |= URB_FREE_BUFFER;
1227
1228 usb_mark_last_busy(btmtk_data->udev);
1229 usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
1230
1231 err = usb_submit_urb(urb, mem_flags);
1232 if (err < 0) {
1233 if (err != -EPERM && err != -ENODEV)
1234 bt_dev_err(hdev, "urb %p submission failed (%d)",
1235 urb, -err);
1236 usb_unanchor_urb(urb);
1237 }
1238
1239 usb_free_urb(urb);
1240
1241 return err;
1242 }
1243
btmtk_usb_isointf_init(struct hci_dev * hdev)1244 static int btmtk_usb_isointf_init(struct hci_dev *hdev)
1245 {
1246 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1247 u8 iso_param[2] = { 0x08, 0x01 };
1248 struct sk_buff *skb;
1249 int err;
1250
1251 spin_lock_init(&btmtk_data->isorxlock);
1252
1253 __set_mtk_intr_interface(hdev);
1254
1255 err = btmtk_submit_intr_urb(hdev, GFP_KERNEL);
1256 if (err < 0) {
1257 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
1258 bt_dev_err(hdev, "ISO intf not support (%d)", err);
1259 return err;
1260 }
1261
1262 skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param,
1263 HCI_INIT_TIMEOUT);
1264 if (IS_ERR(skb)) {
1265 bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb));
1266 return PTR_ERR(skb);
1267 }
1268 kfree_skb(skb);
1269
1270 return 0;
1271 }
1272
btmtk_usb_resume(struct hci_dev * hdev)1273 int btmtk_usb_resume(struct hci_dev *hdev)
1274 {
1275 /* This function describes the specific additional steps taken by MediaTek
1276 * when Bluetooth usb driver's resume function is called.
1277 */
1278 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1279
1280 /* Resubmit urb for iso data transmission */
1281 if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) {
1282 if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0)
1283 clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
1284 }
1285
1286 return 0;
1287 }
1288 EXPORT_SYMBOL_GPL(btmtk_usb_resume);
1289
btmtk_usb_suspend(struct hci_dev * hdev)1290 int btmtk_usb_suspend(struct hci_dev *hdev)
1291 {
1292 /* This function describes the specific additional steps taken by MediaTek
1293 * when Bluetooth usb driver's suspend function is called.
1294 */
1295 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1296
1297 /* Stop urb anchor for iso data transmission */
1298 if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
1299 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
1300
1301 return 0;
1302 }
1303 EXPORT_SYMBOL_GPL(btmtk_usb_suspend);
1304
btmtk_usb_setup(struct hci_dev * hdev)1305 int btmtk_usb_setup(struct hci_dev *hdev)
1306 {
1307 struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1308 struct btmtk_hci_wmt_params wmt_params;
1309 ktime_t calltime, delta, rettime;
1310 struct btmtk_tci_sleep tci_sleep;
1311 unsigned long long duration;
1312 struct sk_buff *skb;
1313 const char *fwname;
1314 int err, status;
1315 u32 dev_id = 0;
1316 char fw_bin_name[64];
1317 u32 fw_version = 0, fw_flavor = 0;
1318 u8 param;
1319
1320 calltime = ktime_get();
1321
1322 err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id);
1323 if (err < 0) {
1324 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1325 return err;
1326 }
1327
1328 if (!dev_id || dev_id != 0x7663) {
1329 err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id);
1330 if (err < 0) {
1331 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1332 return err;
1333 }
1334 err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version);
1335 if (err < 0) {
1336 bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1337 return err;
1338 }
1339 err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor);
1340 if (err < 0) {
1341 bt_dev_err(hdev, "Failed to get fw flavor (%d)", err);
1342 return err;
1343 }
1344 fw_flavor = (fw_flavor & 0x00000080) >> 7;
1345 }
1346
1347 if (!dev_id) {
1348 u16 vid = le16_to_cpu(btmtk_data->udev->descriptor.idVendor);
1349 u16 pid = le16_to_cpu(btmtk_data->udev->descriptor.idProduct);
1350 int i;
1351
1352 for (i = 0; i < ARRAY_SIZE(btmtk_mt6639_devs); i++) {
1353 if (vid == btmtk_mt6639_devs[i].vendor &&
1354 pid == btmtk_mt6639_devs[i].product) {
1355 dev_id = 0x6639;
1356 break;
1357 }
1358 }
1359
1360 if (dev_id)
1361 bt_dev_info(hdev, "MT6639: CHIPID=0x0000 with VID=%04x PID=%04x, using 0x6639",
1362 vid, pid);
1363 }
1364
1365 btmtk_data->dev_id = dev_id;
1366
1367 err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version);
1368 if (err < 0)
1369 bt_dev_err(hdev, "Failed to register coredump (%d)", err);
1370
1371 switch (dev_id) {
1372 case 0x7663:
1373 fwname = FIRMWARE_MT7663;
1374 break;
1375 case 0x7668:
1376 fwname = FIRMWARE_MT7668;
1377 break;
1378 case 0x7922:
1379 case 0x7925:
1380 case 0x7961:
1381 case 0x7902:
1382 case 0x6639:
1383 btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id,
1384 fw_version, fw_flavor);
1385
1386 err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
1387 btmtk_usb_hci_wmt_sync,
1388 dev_id);
1389 if (err < 0) {
1390 /* retry once if setup firmware error */
1391 if (!test_and_set_bit(BTMTK_FIRMWARE_DL_RETRY, &btmtk_data->flags))
1392 btmtk_reset_sync(hdev);
1393 bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
1394 return err;
1395 }
1396
1397 /* It's Device EndPoint Reset Option Register */
1398 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT,
1399 MTK_EP_RST_IN_OUT_OPT);
1400 if (err < 0)
1401 return err;
1402
1403 /* Enable Bluetooth protocol */
1404 param = 1;
1405 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1406 wmt_params.flag = 0;
1407 wmt_params.dlen = sizeof(param);
1408 wmt_params.data = ¶m;
1409 wmt_params.status = NULL;
1410
1411 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1412 if (err < 0) {
1413 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1414 return err;
1415 }
1416
1417 hci_set_msft_opcode(hdev, 0xFD30);
1418 hci_set_aosp_capable(hdev);
1419
1420 /* Clear BTMTK_FIRMWARE_DL_RETRY if setup successfully */
1421 test_and_clear_bit(BTMTK_FIRMWARE_DL_RETRY, &btmtk_data->flags);
1422
1423 /* Set up ISO interface after protocol enabled */
1424 if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
1425 if (!btmtk_usb_isointf_init(hdev))
1426 set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
1427 }
1428
1429 goto done;
1430 default:
1431 bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
1432 dev_id);
1433 return -ENODEV;
1434 }
1435
1436 /* Query whether the firmware is already download */
1437 wmt_params.op = BTMTK_WMT_SEMAPHORE;
1438 wmt_params.flag = 1;
1439 wmt_params.dlen = 0;
1440 wmt_params.data = NULL;
1441 wmt_params.status = &status;
1442
1443 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1444 if (err < 0) {
1445 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
1446 return err;
1447 }
1448
1449 if (status == BTMTK_WMT_PATCH_DONE) {
1450 bt_dev_info(hdev, "firmware already downloaded");
1451 goto ignore_setup_fw;
1452 }
1453
1454 /* Setup a firmware which the device definitely requires */
1455 err = btmtk_setup_firmware(hdev, fwname,
1456 btmtk_usb_hci_wmt_sync);
1457 if (err < 0)
1458 return err;
1459
1460 ignore_setup_fw:
1461 err = readx_poll_timeout(btmtk_usb_func_query, hdev, status,
1462 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
1463 2000, 5000000);
1464 /* -ETIMEDOUT happens */
1465 if (err < 0)
1466 return err;
1467
1468 /* The other errors happen in btmtk_usb_func_query */
1469 if (status < 0)
1470 return status;
1471
1472 if (status == BTMTK_WMT_ON_DONE) {
1473 bt_dev_info(hdev, "function already on");
1474 goto ignore_func_on;
1475 }
1476
1477 /* Enable Bluetooth protocol */
1478 param = 1;
1479 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1480 wmt_params.flag = 0;
1481 wmt_params.dlen = sizeof(param);
1482 wmt_params.data = ¶m;
1483 wmt_params.status = NULL;
1484
1485 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1486 if (err < 0) {
1487 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1488 return err;
1489 }
1490
1491 ignore_func_on:
1492 /* Apply the low power environment setup */
1493 tci_sleep.mode = 0x5;
1494 tci_sleep.duration = cpu_to_le16(0x640);
1495 tci_sleep.host_duration = cpu_to_le16(0x640);
1496 tci_sleep.host_wakeup_pin = 0;
1497 tci_sleep.time_compensation = 0;
1498
1499 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
1500 HCI_INIT_TIMEOUT);
1501 if (IS_ERR(skb)) {
1502 err = PTR_ERR(skb);
1503 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
1504 return err;
1505 }
1506 kfree_skb(skb);
1507
1508 done:
1509 rettime = ktime_get();
1510 delta = ktime_sub(rettime, calltime);
1511 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1512
1513 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1514
1515 return 0;
1516 }
1517 EXPORT_SYMBOL_GPL(btmtk_usb_setup);
1518
btmtk_usb_shutdown(struct hci_dev * hdev)1519 int btmtk_usb_shutdown(struct hci_dev *hdev)
1520 {
1521 struct btmtk_data *data = hci_get_priv(hdev);
1522 struct btmtk_hci_wmt_params wmt_params;
1523 u8 param = 0;
1524 int err;
1525
1526 err = usb_autopm_get_interface(data->intf);
1527 if (err < 0)
1528 return err;
1529
1530 /* Disable the device */
1531 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1532 wmt_params.flag = 0;
1533 wmt_params.dlen = sizeof(param);
1534 wmt_params.data = ¶m;
1535 wmt_params.status = NULL;
1536
1537 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1538 if (err < 0) {
1539 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1540 usb_autopm_put_interface(data->intf);
1541 return err;
1542 }
1543
1544 usb_autopm_put_interface(data->intf);
1545 return 0;
1546 }
1547 EXPORT_SYMBOL_GPL(btmtk_usb_shutdown);
1548 #endif
1549
1550 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1551 MODULE_AUTHOR("Mark Chen <mark-yw.chen@mediatek.com>");
1552 MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION);
1553 MODULE_VERSION(VERSION);
1554 MODULE_LICENSE("GPL");
1555 MODULE_FIRMWARE(FIRMWARE_MT7622);
1556 MODULE_FIRMWARE(FIRMWARE_MT7663);
1557 MODULE_FIRMWARE(FIRMWARE_MT7668);
1558 MODULE_FIRMWARE(FIRMWARE_MT7922);
1559 MODULE_FIRMWARE(FIRMWARE_MT7961);
1560 MODULE_FIRMWARE(FIRMWARE_MT7925);
1561 MODULE_FIRMWARE(FIRMWARE_MT7927);
1562