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7237c4c9 SW |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (c) 2018 MediaTek Inc. | |
3 | ||
4 | /* | |
5 | * Bluetooth support for MediaTek serial devices | |
6 | * | |
7 | * Author: Sean Wang <sean.wang@mediatek.com> | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <asm/unaligned.h> | |
12 | #include <linux/atomic.h> | |
13 | #include <linux/clk.h> | |
14 | #include <linux/firmware.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/pm_runtime.h> | |
19 | #include <linux/serdev.h> | |
20 | #include <linux/skbuff.h> | |
21 | ||
22 | #include <net/bluetooth/bluetooth.h> | |
23 | #include <net/bluetooth/hci_core.h> | |
24 | ||
25 | #include "h4_recv.h" | |
26 | ||
27 | #define VERSION "0.1" | |
28 | ||
29 | #define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin" | |
30 | ||
31 | #define MTK_STP_TLR_SIZE 2 | |
32 | ||
33 | #define BTMTKUART_TX_STATE_ACTIVE 1 | |
34 | #define BTMTKUART_TX_STATE_WAKEUP 2 | |
35 | #define BTMTKUART_TX_WAIT_VND_EVT 3 | |
36 | ||
37 | enum { | |
38 | MTK_WMT_PATCH_DWNLD = 0x1, | |
39 | MTK_WMT_FUNC_CTRL = 0x6, | |
40 | MTK_WMT_RST = 0x7 | |
41 | }; | |
42 | ||
43 | struct mtk_stp_hdr { | |
44 | u8 prefix; | |
45 | __be16 dlen; | |
46 | u8 cs; | |
47 | } __packed; | |
48 | ||
49 | struct mtk_wmt_hdr { | |
50 | u8 dir; | |
51 | u8 op; | |
52 | __le16 dlen; | |
53 | u8 flag; | |
54 | } __packed; | |
55 | ||
56 | struct mtk_hci_wmt_cmd { | |
57 | struct mtk_wmt_hdr hdr; | |
58 | u8 data[256]; | |
59 | } __packed; | |
60 | ||
61 | struct btmtkuart_dev { | |
62 | struct hci_dev *hdev; | |
63 | struct serdev_device *serdev; | |
64 | struct clk *clk; | |
65 | ||
66 | struct work_struct tx_work; | |
67 | unsigned long tx_state; | |
68 | struct sk_buff_head txq; | |
69 | ||
70 | struct sk_buff *rx_skb; | |
71 | ||
72 | u8 stp_pad[6]; | |
73 | u8 stp_cursor; | |
74 | u16 stp_dlen; | |
75 | }; | |
76 | ||
77 | static int mtk_hci_wmt_sync(struct hci_dev *hdev, u8 op, u8 flag, u16 plen, | |
78 | const void *param) | |
79 | { | |
80 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
81 | struct mtk_hci_wmt_cmd wc; | |
82 | struct mtk_wmt_hdr *hdr; | |
83 | u32 hlen; | |
84 | int err; | |
85 | ||
86 | hlen = sizeof(*hdr) + plen; | |
87 | if (hlen > 255) | |
88 | return -EINVAL; | |
89 | ||
90 | hdr = (struct mtk_wmt_hdr *)&wc; | |
91 | hdr->dir = 1; | |
92 | hdr->op = op; | |
93 | hdr->dlen = cpu_to_le16(plen + 1); | |
94 | hdr->flag = flag; | |
95 | memcpy(wc.data, param, plen); | |
96 | ||
97 | set_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); | |
98 | ||
99 | err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc); | |
100 | if (err < 0) { | |
101 | clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); | |
102 | return err; | |
103 | } | |
104 | ||
105 | /* The vendor specific WMT commands are all answered by a vendor | |
106 | * specific event and will not have the Command Status or Command | |
107 | * Complete as with usual HCI command flow control. | |
108 | * | |
109 | * After sending the command, wait for BTMTKUART_TX_WAIT_VND_EVT | |
110 | * state to be cleared. The driver speicfic event receive routine | |
111 | * will clear that state and with that indicate completion of the | |
112 | * WMT command. | |
113 | */ | |
114 | err = wait_on_bit_timeout(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT, | |
115 | TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT); | |
116 | if (err == -EINTR) { | |
117 | bt_dev_err(hdev, "Execution of wmt command interrupted"); | |
118 | return err; | |
119 | } | |
120 | ||
121 | if (err) { | |
122 | bt_dev_err(hdev, "Execution of wmt command timed out"); | |
123 | return -ETIMEDOUT; | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static int mtk_setup_fw(struct hci_dev *hdev) | |
130 | { | |
131 | const struct firmware *fw; | |
132 | const u8 *fw_ptr; | |
133 | size_t fw_size; | |
134 | int err, dlen; | |
135 | u8 flag; | |
136 | ||
137 | err = request_firmware(&fw, FIRMWARE_MT7622, &hdev->dev); | |
138 | if (err < 0) { | |
139 | bt_dev_err(hdev, "Failed to load firmware file (%d)", err); | |
140 | return err; | |
141 | } | |
142 | ||
143 | fw_ptr = fw->data; | |
144 | fw_size = fw->size; | |
145 | ||
146 | /* The size of patch header is 30 bytes, should be skip */ | |
addb3ffb GS |
147 | if (fw_size < 30) { |
148 | err = -EINVAL; | |
149 | goto free_fw; | |
150 | } | |
7237c4c9 SW |
151 | |
152 | fw_size -= 30; | |
153 | fw_ptr += 30; | |
154 | flag = 1; | |
155 | ||
156 | while (fw_size > 0) { | |
157 | dlen = min_t(int, 250, fw_size); | |
158 | ||
159 | /* Tell device the position in sequence */ | |
160 | if (fw_size - dlen <= 0) | |
161 | flag = 3; | |
162 | else if (fw_size < fw->size - 30) | |
163 | flag = 2; | |
164 | ||
165 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_PATCH_DWNLD, flag, dlen, | |
166 | fw_ptr); | |
167 | if (err < 0) { | |
168 | bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", | |
169 | err); | |
170 | break; | |
171 | } | |
172 | ||
173 | fw_size -= dlen; | |
174 | fw_ptr += dlen; | |
175 | } | |
176 | ||
addb3ffb | 177 | free_fw: |
7237c4c9 | 178 | release_firmware(fw); |
7237c4c9 SW |
179 | return err; |
180 | } | |
181 | ||
182 | static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb) | |
183 | { | |
184 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
185 | struct hci_event_hdr *hdr = (void *)skb->data; | |
186 | int err; | |
187 | ||
188 | /* Fix up the vendor event id with 0xff for vendor specific instead | |
189 | * of 0xe4 so that event send via monitoring socket can be parsed | |
190 | * properly. | |
191 | */ | |
192 | if (hdr->evt == 0xe4) | |
193 | hdr->evt = HCI_EV_VENDOR; | |
194 | ||
195 | err = hci_recv_frame(hdev, skb); | |
196 | ||
197 | if (hdr->evt == HCI_EV_VENDOR) { | |
198 | if (test_and_clear_bit(BTMTKUART_TX_WAIT_VND_EVT, | |
199 | &bdev->tx_state)) { | |
200 | /* Barrier to sync with other CPUs */ | |
201 | smp_mb__after_atomic(); | |
202 | wake_up_bit(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT); | |
203 | } | |
204 | } | |
205 | ||
206 | return err; | |
207 | } | |
208 | ||
209 | static const struct h4_recv_pkt mtk_recv_pkts[] = { | |
210 | { H4_RECV_ACL, .recv = hci_recv_frame }, | |
211 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
212 | { H4_RECV_EVENT, .recv = btmtkuart_recv_event }, | |
213 | }; | |
214 | ||
215 | static void btmtkuart_tx_work(struct work_struct *work) | |
216 | { | |
217 | struct btmtkuart_dev *bdev = container_of(work, struct btmtkuart_dev, | |
218 | tx_work); | |
219 | struct serdev_device *serdev = bdev->serdev; | |
220 | struct hci_dev *hdev = bdev->hdev; | |
221 | ||
222 | while (1) { | |
223 | clear_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); | |
224 | ||
225 | while (1) { | |
226 | struct sk_buff *skb = skb_dequeue(&bdev->txq); | |
227 | int len; | |
228 | ||
229 | if (!skb) | |
230 | break; | |
231 | ||
232 | len = serdev_device_write_buf(serdev, skb->data, | |
233 | skb->len); | |
234 | hdev->stat.byte_tx += len; | |
235 | ||
236 | skb_pull(skb, len); | |
237 | if (skb->len > 0) { | |
238 | skb_queue_head(&bdev->txq, skb); | |
239 | break; | |
240 | } | |
241 | ||
242 | switch (hci_skb_pkt_type(skb)) { | |
243 | case HCI_COMMAND_PKT: | |
244 | hdev->stat.cmd_tx++; | |
245 | break; | |
246 | case HCI_ACLDATA_PKT: | |
247 | hdev->stat.acl_tx++; | |
248 | break; | |
249 | case HCI_SCODATA_PKT: | |
250 | hdev->stat.sco_tx++; | |
251 | break; | |
252 | } | |
253 | ||
254 | kfree_skb(skb); | |
255 | } | |
256 | ||
257 | if (!test_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state)) | |
258 | break; | |
259 | } | |
260 | ||
261 | clear_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state); | |
262 | } | |
263 | ||
264 | static void btmtkuart_tx_wakeup(struct btmtkuart_dev *bdev) | |
265 | { | |
266 | if (test_and_set_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state)) | |
267 | set_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); | |
268 | ||
269 | schedule_work(&bdev->tx_work); | |
270 | } | |
271 | ||
272 | static const unsigned char * | |
273 | mtk_stp_split(struct btmtkuart_dev *bdev, const unsigned char *data, int count, | |
274 | int *sz_h4) | |
275 | { | |
276 | struct mtk_stp_hdr *shdr; | |
277 | ||
278 | /* The cursor is reset when all the data of STP is consumed out */ | |
279 | if (!bdev->stp_dlen && bdev->stp_cursor >= 6) | |
280 | bdev->stp_cursor = 0; | |
281 | ||
282 | /* Filling pad until all STP info is obtained */ | |
283 | while (bdev->stp_cursor < 6 && count > 0) { | |
284 | bdev->stp_pad[bdev->stp_cursor] = *data; | |
285 | bdev->stp_cursor++; | |
286 | data++; | |
287 | count--; | |
288 | } | |
289 | ||
290 | /* Retrieve STP info and have a sanity check */ | |
291 | if (!bdev->stp_dlen && bdev->stp_cursor >= 6) { | |
292 | shdr = (struct mtk_stp_hdr *)&bdev->stp_pad[2]; | |
293 | bdev->stp_dlen = be16_to_cpu(shdr->dlen) & 0x0fff; | |
294 | ||
295 | /* Resync STP when unexpected data is being read */ | |
296 | if (shdr->prefix != 0x80 || bdev->stp_dlen > 2048) { | |
297 | bt_dev_err(bdev->hdev, "stp format unexpect (%d, %d)", | |
298 | shdr->prefix, bdev->stp_dlen); | |
299 | bdev->stp_cursor = 2; | |
300 | bdev->stp_dlen = 0; | |
301 | } | |
302 | } | |
303 | ||
304 | /* Directly quit when there's no data found for H4 can process */ | |
305 | if (count <= 0) | |
306 | return NULL; | |
307 | ||
308 | /* Tranlate to how much the size of data H4 can handle so far */ | |
309 | *sz_h4 = min_t(int, count, bdev->stp_dlen); | |
310 | ||
311 | /* Update the remaining size of STP packet */ | |
312 | bdev->stp_dlen -= *sz_h4; | |
313 | ||
314 | /* Data points to STP payload which can be handled by H4 */ | |
315 | return data; | |
316 | } | |
317 | ||
318 | static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) | |
319 | { | |
320 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
321 | const unsigned char *p_left = data, *p_h4; | |
322 | int sz_left = count, sz_h4, adv; | |
323 | int err; | |
324 | ||
325 | while (sz_left > 0) { | |
326 | /* The serial data received from MT7622 BT controller is | |
327 | * at all time padded around with the STP header and tailer. | |
328 | * | |
329 | * A full STP packet is looking like | |
330 | * ----------------------------------- | |
331 | * | STP header | H:4 | STP tailer | | |
332 | * ----------------------------------- | |
333 | * but it doesn't guarantee to contain a full H:4 packet which | |
334 | * means that it's possible for multiple STP packets forms a | |
335 | * full H:4 packet that means extra STP header + length doesn't | |
336 | * indicate a full H:4 frame, things can fragment. Whose length | |
337 | * recorded in STP header just shows up the most length the | |
338 | * H:4 engine can handle currently. | |
339 | */ | |
340 | ||
341 | p_h4 = mtk_stp_split(bdev, p_left, sz_left, &sz_h4); | |
342 | if (!p_h4) | |
343 | break; | |
344 | ||
345 | adv = p_h4 - p_left; | |
346 | sz_left -= adv; | |
347 | p_left += adv; | |
348 | ||
349 | bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, p_h4, | |
350 | sz_h4, mtk_recv_pkts, | |
330ad75f | 351 | ARRAY_SIZE(mtk_recv_pkts)); |
7237c4c9 SW |
352 | if (IS_ERR(bdev->rx_skb)) { |
353 | err = PTR_ERR(bdev->rx_skb); | |
354 | bt_dev_err(bdev->hdev, | |
355 | "Frame reassembly failed (%d)", err); | |
356 | bdev->rx_skb = NULL; | |
357 | return err; | |
358 | } | |
359 | ||
360 | sz_left -= sz_h4; | |
361 | p_left += sz_h4; | |
362 | } | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data, | |
368 | size_t count) | |
369 | { | |
370 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
371 | int err; | |
372 | ||
373 | err = btmtkuart_recv(bdev->hdev, data, count); | |
374 | if (err < 0) | |
375 | return err; | |
376 | ||
377 | bdev->hdev->stat.byte_rx += count; | |
378 | ||
379 | return count; | |
380 | } | |
381 | ||
382 | static void btmtkuart_write_wakeup(struct serdev_device *serdev) | |
383 | { | |
384 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
385 | ||
386 | btmtkuart_tx_wakeup(bdev); | |
387 | } | |
388 | ||
389 | static const struct serdev_device_ops btmtkuart_client_ops = { | |
390 | .receive_buf = btmtkuart_receive_buf, | |
391 | .write_wakeup = btmtkuart_write_wakeup, | |
392 | }; | |
393 | ||
394 | static int btmtkuart_open(struct hci_dev *hdev) | |
395 | { | |
396 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
397 | struct device *dev; | |
398 | int err; | |
399 | ||
400 | err = serdev_device_open(bdev->serdev); | |
401 | if (err) { | |
402 | bt_dev_err(hdev, "Unable to open UART device %s", | |
403 | dev_name(&bdev->serdev->dev)); | |
404 | goto err_open; | |
405 | } | |
406 | ||
407 | bdev->stp_cursor = 2; | |
408 | bdev->stp_dlen = 0; | |
409 | ||
410 | dev = &bdev->serdev->dev; | |
411 | ||
412 | /* Enable the power domain and clock the device requires */ | |
413 | pm_runtime_enable(dev); | |
414 | err = pm_runtime_get_sync(dev); | |
415 | if (err < 0) { | |
416 | pm_runtime_put_noidle(dev); | |
417 | goto err_disable_rpm; | |
418 | } | |
419 | ||
420 | err = clk_prepare_enable(bdev->clk); | |
421 | if (err < 0) | |
422 | goto err_put_rpm; | |
423 | ||
424 | return 0; | |
425 | ||
426 | err_put_rpm: | |
427 | pm_runtime_put_sync(dev); | |
428 | err_disable_rpm: | |
429 | pm_runtime_disable(dev); | |
430 | err_open: | |
431 | return err; | |
432 | } | |
433 | ||
434 | static int btmtkuart_close(struct hci_dev *hdev) | |
435 | { | |
436 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
437 | struct device *dev = &bdev->serdev->dev; | |
438 | ||
439 | /* Shutdown the clock and power domain the device requires */ | |
440 | clk_disable_unprepare(bdev->clk); | |
441 | pm_runtime_put_sync(dev); | |
442 | pm_runtime_disable(dev); | |
443 | ||
444 | serdev_device_close(bdev->serdev); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | static int btmtkuart_flush(struct hci_dev *hdev) | |
450 | { | |
451 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
452 | ||
453 | /* Flush any pending characters */ | |
454 | serdev_device_write_flush(bdev->serdev); | |
455 | skb_queue_purge(&bdev->txq); | |
456 | ||
457 | cancel_work_sync(&bdev->tx_work); | |
458 | ||
459 | kfree_skb(bdev->rx_skb); | |
460 | bdev->rx_skb = NULL; | |
461 | ||
462 | bdev->stp_cursor = 2; | |
463 | bdev->stp_dlen = 0; | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | static int btmtkuart_setup(struct hci_dev *hdev) | |
469 | { | |
470 | u8 param = 0x1; | |
471 | int err = 0; | |
472 | ||
473 | /* Setup a firmware which the device definitely requires */ | |
474 | err = mtk_setup_fw(hdev); | |
475 | if (err < 0) | |
476 | return err; | |
477 | ||
478 | /* Activate function the firmware providing to */ | |
479 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_RST, 0x4, 0, 0); | |
480 | if (err < 0) { | |
481 | bt_dev_err(hdev, "Failed to send wmt rst (%d)", err); | |
482 | return err; | |
483 | } | |
484 | ||
485 | /* Enable Bluetooth protocol */ | |
486 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param), | |
487 | ¶m); | |
488 | if (err < 0) { | |
489 | bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); | |
490 | return err; | |
491 | } | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | static int btmtkuart_shutdown(struct hci_dev *hdev) | |
497 | { | |
498 | u8 param = 0x0; | |
499 | int err; | |
500 | ||
501 | /* Disable the device */ | |
502 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param), | |
503 | ¶m); | |
504 | if (err < 0) { | |
505 | bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); | |
506 | return err; | |
507 | } | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int btmtkuart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) | |
513 | { | |
514 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
515 | struct mtk_stp_hdr *shdr; | |
516 | int err, dlen, type = 0; | |
517 | ||
518 | /* Prepend skb with frame type */ | |
519 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); | |
520 | ||
521 | /* Make sure that there is enough rooms for STP header and trailer */ | |
522 | if (unlikely(skb_headroom(skb) < sizeof(*shdr)) || | |
523 | (skb_tailroom(skb) < MTK_STP_TLR_SIZE)) { | |
524 | err = pskb_expand_head(skb, sizeof(*shdr), MTK_STP_TLR_SIZE, | |
525 | GFP_ATOMIC); | |
526 | if (err < 0) | |
527 | return err; | |
528 | } | |
529 | ||
530 | /* Add the STP header */ | |
531 | dlen = skb->len; | |
532 | shdr = skb_push(skb, sizeof(*shdr)); | |
533 | shdr->prefix = 0x80; | |
534 | shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12)); | |
535 | shdr->cs = 0; /* MT7622 doesn't care about checksum value */ | |
536 | ||
537 | /* Add the STP trailer */ | |
538 | skb_put_zero(skb, MTK_STP_TLR_SIZE); | |
539 | ||
540 | skb_queue_tail(&bdev->txq, skb); | |
541 | ||
542 | btmtkuart_tx_wakeup(bdev); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | static int btmtkuart_probe(struct serdev_device *serdev) | |
547 | { | |
548 | struct btmtkuart_dev *bdev; | |
549 | struct hci_dev *hdev; | |
550 | ||
551 | bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL); | |
552 | if (!bdev) | |
553 | return -ENOMEM; | |
554 | ||
555 | bdev->clk = devm_clk_get(&serdev->dev, "ref"); | |
556 | if (IS_ERR(bdev->clk)) | |
557 | return PTR_ERR(bdev->clk); | |
558 | ||
559 | bdev->serdev = serdev; | |
560 | serdev_device_set_drvdata(serdev, bdev); | |
561 | ||
562 | serdev_device_set_client_ops(serdev, &btmtkuart_client_ops); | |
563 | ||
564 | INIT_WORK(&bdev->tx_work, btmtkuart_tx_work); | |
565 | skb_queue_head_init(&bdev->txq); | |
566 | ||
567 | /* Initialize and register HCI device */ | |
568 | hdev = hci_alloc_dev(); | |
569 | if (!hdev) { | |
570 | dev_err(&serdev->dev, "Can't allocate HCI device\n"); | |
571 | return -ENOMEM; | |
572 | } | |
573 | ||
574 | bdev->hdev = hdev; | |
575 | ||
576 | hdev->bus = HCI_UART; | |
577 | hci_set_drvdata(hdev, bdev); | |
578 | ||
579 | hdev->open = btmtkuart_open; | |
580 | hdev->close = btmtkuart_close; | |
581 | hdev->flush = btmtkuart_flush; | |
582 | hdev->setup = btmtkuart_setup; | |
583 | hdev->shutdown = btmtkuart_shutdown; | |
584 | hdev->send = btmtkuart_send_frame; | |
585 | SET_HCIDEV_DEV(hdev, &serdev->dev); | |
586 | ||
587 | hdev->manufacturer = 70; | |
588 | set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); | |
589 | ||
590 | if (hci_register_dev(hdev) < 0) { | |
591 | dev_err(&serdev->dev, "Can't register HCI device\n"); | |
592 | hci_free_dev(hdev); | |
593 | return -ENODEV; | |
594 | } | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | static void btmtkuart_remove(struct serdev_device *serdev) | |
600 | { | |
601 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
602 | struct hci_dev *hdev = bdev->hdev; | |
603 | ||
604 | hci_unregister_dev(hdev); | |
605 | hci_free_dev(hdev); | |
606 | } | |
607 | ||
608 | #ifdef CONFIG_OF | |
609 | static const struct of_device_id mtk_of_match_table[] = { | |
610 | { .compatible = "mediatek,mt7622-bluetooth"}, | |
611 | { } | |
612 | }; | |
613 | MODULE_DEVICE_TABLE(of, mtk_of_match_table); | |
614 | #endif | |
615 | ||
616 | static struct serdev_device_driver btmtkuart_driver = { | |
617 | .probe = btmtkuart_probe, | |
618 | .remove = btmtkuart_remove, | |
619 | .driver = { | |
620 | .name = "btmtkuart", | |
621 | .of_match_table = of_match_ptr(mtk_of_match_table), | |
622 | }, | |
623 | }; | |
624 | ||
625 | module_serdev_device_driver(btmtkuart_driver); | |
626 | ||
627 | MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); | |
628 | MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION); | |
629 | MODULE_VERSION(VERSION); | |
630 | MODULE_LICENSE("GPL"); | |
631 | MODULE_FIRMWARE(FIRMWARE_MT7622); |