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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 */ | |
147 | if (fw_size < 30) | |
148 | return -EINVAL; | |
149 | ||
150 | fw_size -= 30; | |
151 | fw_ptr += 30; | |
152 | flag = 1; | |
153 | ||
154 | while (fw_size > 0) { | |
155 | dlen = min_t(int, 250, fw_size); | |
156 | ||
157 | /* Tell device the position in sequence */ | |
158 | if (fw_size - dlen <= 0) | |
159 | flag = 3; | |
160 | else if (fw_size < fw->size - 30) | |
161 | flag = 2; | |
162 | ||
163 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_PATCH_DWNLD, flag, dlen, | |
164 | fw_ptr); | |
165 | if (err < 0) { | |
166 | bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", | |
167 | err); | |
168 | break; | |
169 | } | |
170 | ||
171 | fw_size -= dlen; | |
172 | fw_ptr += dlen; | |
173 | } | |
174 | ||
175 | release_firmware(fw); | |
176 | ||
177 | return err; | |
178 | } | |
179 | ||
180 | static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb) | |
181 | { | |
182 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
183 | struct hci_event_hdr *hdr = (void *)skb->data; | |
184 | int err; | |
185 | ||
186 | /* Fix up the vendor event id with 0xff for vendor specific instead | |
187 | * of 0xe4 so that event send via monitoring socket can be parsed | |
188 | * properly. | |
189 | */ | |
190 | if (hdr->evt == 0xe4) | |
191 | hdr->evt = HCI_EV_VENDOR; | |
192 | ||
193 | err = hci_recv_frame(hdev, skb); | |
194 | ||
195 | if (hdr->evt == HCI_EV_VENDOR) { | |
196 | if (test_and_clear_bit(BTMTKUART_TX_WAIT_VND_EVT, | |
197 | &bdev->tx_state)) { | |
198 | /* Barrier to sync with other CPUs */ | |
199 | smp_mb__after_atomic(); | |
200 | wake_up_bit(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT); | |
201 | } | |
202 | } | |
203 | ||
204 | return err; | |
205 | } | |
206 | ||
207 | static const struct h4_recv_pkt mtk_recv_pkts[] = { | |
208 | { H4_RECV_ACL, .recv = hci_recv_frame }, | |
209 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
210 | { H4_RECV_EVENT, .recv = btmtkuart_recv_event }, | |
211 | }; | |
212 | ||
213 | static void btmtkuart_tx_work(struct work_struct *work) | |
214 | { | |
215 | struct btmtkuart_dev *bdev = container_of(work, struct btmtkuart_dev, | |
216 | tx_work); | |
217 | struct serdev_device *serdev = bdev->serdev; | |
218 | struct hci_dev *hdev = bdev->hdev; | |
219 | ||
220 | while (1) { | |
221 | clear_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); | |
222 | ||
223 | while (1) { | |
224 | struct sk_buff *skb = skb_dequeue(&bdev->txq); | |
225 | int len; | |
226 | ||
227 | if (!skb) | |
228 | break; | |
229 | ||
230 | len = serdev_device_write_buf(serdev, skb->data, | |
231 | skb->len); | |
232 | hdev->stat.byte_tx += len; | |
233 | ||
234 | skb_pull(skb, len); | |
235 | if (skb->len > 0) { | |
236 | skb_queue_head(&bdev->txq, skb); | |
237 | break; | |
238 | } | |
239 | ||
240 | switch (hci_skb_pkt_type(skb)) { | |
241 | case HCI_COMMAND_PKT: | |
242 | hdev->stat.cmd_tx++; | |
243 | break; | |
244 | case HCI_ACLDATA_PKT: | |
245 | hdev->stat.acl_tx++; | |
246 | break; | |
247 | case HCI_SCODATA_PKT: | |
248 | hdev->stat.sco_tx++; | |
249 | break; | |
250 | } | |
251 | ||
252 | kfree_skb(skb); | |
253 | } | |
254 | ||
255 | if (!test_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state)) | |
256 | break; | |
257 | } | |
258 | ||
259 | clear_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state); | |
260 | } | |
261 | ||
262 | static void btmtkuart_tx_wakeup(struct btmtkuart_dev *bdev) | |
263 | { | |
264 | if (test_and_set_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state)) | |
265 | set_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); | |
266 | ||
267 | schedule_work(&bdev->tx_work); | |
268 | } | |
269 | ||
270 | static const unsigned char * | |
271 | mtk_stp_split(struct btmtkuart_dev *bdev, const unsigned char *data, int count, | |
272 | int *sz_h4) | |
273 | { | |
274 | struct mtk_stp_hdr *shdr; | |
275 | ||
276 | /* The cursor is reset when all the data of STP is consumed out */ | |
277 | if (!bdev->stp_dlen && bdev->stp_cursor >= 6) | |
278 | bdev->stp_cursor = 0; | |
279 | ||
280 | /* Filling pad until all STP info is obtained */ | |
281 | while (bdev->stp_cursor < 6 && count > 0) { | |
282 | bdev->stp_pad[bdev->stp_cursor] = *data; | |
283 | bdev->stp_cursor++; | |
284 | data++; | |
285 | count--; | |
286 | } | |
287 | ||
288 | /* Retrieve STP info and have a sanity check */ | |
289 | if (!bdev->stp_dlen && bdev->stp_cursor >= 6) { | |
290 | shdr = (struct mtk_stp_hdr *)&bdev->stp_pad[2]; | |
291 | bdev->stp_dlen = be16_to_cpu(shdr->dlen) & 0x0fff; | |
292 | ||
293 | /* Resync STP when unexpected data is being read */ | |
294 | if (shdr->prefix != 0x80 || bdev->stp_dlen > 2048) { | |
295 | bt_dev_err(bdev->hdev, "stp format unexpect (%d, %d)", | |
296 | shdr->prefix, bdev->stp_dlen); | |
297 | bdev->stp_cursor = 2; | |
298 | bdev->stp_dlen = 0; | |
299 | } | |
300 | } | |
301 | ||
302 | /* Directly quit when there's no data found for H4 can process */ | |
303 | if (count <= 0) | |
304 | return NULL; | |
305 | ||
306 | /* Tranlate to how much the size of data H4 can handle so far */ | |
307 | *sz_h4 = min_t(int, count, bdev->stp_dlen); | |
308 | ||
309 | /* Update the remaining size of STP packet */ | |
310 | bdev->stp_dlen -= *sz_h4; | |
311 | ||
312 | /* Data points to STP payload which can be handled by H4 */ | |
313 | return data; | |
314 | } | |
315 | ||
316 | static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) | |
317 | { | |
318 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
319 | const unsigned char *p_left = data, *p_h4; | |
320 | int sz_left = count, sz_h4, adv; | |
321 | int err; | |
322 | ||
323 | while (sz_left > 0) { | |
324 | /* The serial data received from MT7622 BT controller is | |
325 | * at all time padded around with the STP header and tailer. | |
326 | * | |
327 | * A full STP packet is looking like | |
328 | * ----------------------------------- | |
329 | * | STP header | H:4 | STP tailer | | |
330 | * ----------------------------------- | |
331 | * but it doesn't guarantee to contain a full H:4 packet which | |
332 | * means that it's possible for multiple STP packets forms a | |
333 | * full H:4 packet that means extra STP header + length doesn't | |
334 | * indicate a full H:4 frame, things can fragment. Whose length | |
335 | * recorded in STP header just shows up the most length the | |
336 | * H:4 engine can handle currently. | |
337 | */ | |
338 | ||
339 | p_h4 = mtk_stp_split(bdev, p_left, sz_left, &sz_h4); | |
340 | if (!p_h4) | |
341 | break; | |
342 | ||
343 | adv = p_h4 - p_left; | |
344 | sz_left -= adv; | |
345 | p_left += adv; | |
346 | ||
347 | bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, p_h4, | |
348 | sz_h4, mtk_recv_pkts, | |
349 | sizeof(mtk_recv_pkts)); | |
350 | if (IS_ERR(bdev->rx_skb)) { | |
351 | err = PTR_ERR(bdev->rx_skb); | |
352 | bt_dev_err(bdev->hdev, | |
353 | "Frame reassembly failed (%d)", err); | |
354 | bdev->rx_skb = NULL; | |
355 | return err; | |
356 | } | |
357 | ||
358 | sz_left -= sz_h4; | |
359 | p_left += sz_h4; | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data, | |
366 | size_t count) | |
367 | { | |
368 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
369 | int err; | |
370 | ||
371 | err = btmtkuart_recv(bdev->hdev, data, count); | |
372 | if (err < 0) | |
373 | return err; | |
374 | ||
375 | bdev->hdev->stat.byte_rx += count; | |
376 | ||
377 | return count; | |
378 | } | |
379 | ||
380 | static void btmtkuart_write_wakeup(struct serdev_device *serdev) | |
381 | { | |
382 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
383 | ||
384 | btmtkuart_tx_wakeup(bdev); | |
385 | } | |
386 | ||
387 | static const struct serdev_device_ops btmtkuart_client_ops = { | |
388 | .receive_buf = btmtkuart_receive_buf, | |
389 | .write_wakeup = btmtkuart_write_wakeup, | |
390 | }; | |
391 | ||
392 | static int btmtkuart_open(struct hci_dev *hdev) | |
393 | { | |
394 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
395 | struct device *dev; | |
396 | int err; | |
397 | ||
398 | err = serdev_device_open(bdev->serdev); | |
399 | if (err) { | |
400 | bt_dev_err(hdev, "Unable to open UART device %s", | |
401 | dev_name(&bdev->serdev->dev)); | |
402 | goto err_open; | |
403 | } | |
404 | ||
405 | bdev->stp_cursor = 2; | |
406 | bdev->stp_dlen = 0; | |
407 | ||
408 | dev = &bdev->serdev->dev; | |
409 | ||
410 | /* Enable the power domain and clock the device requires */ | |
411 | pm_runtime_enable(dev); | |
412 | err = pm_runtime_get_sync(dev); | |
413 | if (err < 0) { | |
414 | pm_runtime_put_noidle(dev); | |
415 | goto err_disable_rpm; | |
416 | } | |
417 | ||
418 | err = clk_prepare_enable(bdev->clk); | |
419 | if (err < 0) | |
420 | goto err_put_rpm; | |
421 | ||
422 | return 0; | |
423 | ||
424 | err_put_rpm: | |
425 | pm_runtime_put_sync(dev); | |
426 | err_disable_rpm: | |
427 | pm_runtime_disable(dev); | |
428 | err_open: | |
429 | return err; | |
430 | } | |
431 | ||
432 | static int btmtkuart_close(struct hci_dev *hdev) | |
433 | { | |
434 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
435 | struct device *dev = &bdev->serdev->dev; | |
436 | ||
437 | /* Shutdown the clock and power domain the device requires */ | |
438 | clk_disable_unprepare(bdev->clk); | |
439 | pm_runtime_put_sync(dev); | |
440 | pm_runtime_disable(dev); | |
441 | ||
442 | serdev_device_close(bdev->serdev); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | static int btmtkuart_flush(struct hci_dev *hdev) | |
448 | { | |
449 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
450 | ||
451 | /* Flush any pending characters */ | |
452 | serdev_device_write_flush(bdev->serdev); | |
453 | skb_queue_purge(&bdev->txq); | |
454 | ||
455 | cancel_work_sync(&bdev->tx_work); | |
456 | ||
457 | kfree_skb(bdev->rx_skb); | |
458 | bdev->rx_skb = NULL; | |
459 | ||
460 | bdev->stp_cursor = 2; | |
461 | bdev->stp_dlen = 0; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | static int btmtkuart_setup(struct hci_dev *hdev) | |
467 | { | |
468 | u8 param = 0x1; | |
469 | int err = 0; | |
470 | ||
471 | /* Setup a firmware which the device definitely requires */ | |
472 | err = mtk_setup_fw(hdev); | |
473 | if (err < 0) | |
474 | return err; | |
475 | ||
476 | /* Activate function the firmware providing to */ | |
477 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_RST, 0x4, 0, 0); | |
478 | if (err < 0) { | |
479 | bt_dev_err(hdev, "Failed to send wmt rst (%d)", err); | |
480 | return err; | |
481 | } | |
482 | ||
483 | /* Enable Bluetooth protocol */ | |
484 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param), | |
485 | ¶m); | |
486 | if (err < 0) { | |
487 | bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); | |
488 | return err; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static int btmtkuart_shutdown(struct hci_dev *hdev) | |
495 | { | |
496 | u8 param = 0x0; | |
497 | int err; | |
498 | ||
499 | /* Disable the device */ | |
500 | err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param), | |
501 | ¶m); | |
502 | if (err < 0) { | |
503 | bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); | |
504 | return err; | |
505 | } | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
510 | static int btmtkuart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) | |
511 | { | |
512 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
513 | struct mtk_stp_hdr *shdr; | |
514 | int err, dlen, type = 0; | |
515 | ||
516 | /* Prepend skb with frame type */ | |
517 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); | |
518 | ||
519 | /* Make sure that there is enough rooms for STP header and trailer */ | |
520 | if (unlikely(skb_headroom(skb) < sizeof(*shdr)) || | |
521 | (skb_tailroom(skb) < MTK_STP_TLR_SIZE)) { | |
522 | err = pskb_expand_head(skb, sizeof(*shdr), MTK_STP_TLR_SIZE, | |
523 | GFP_ATOMIC); | |
524 | if (err < 0) | |
525 | return err; | |
526 | } | |
527 | ||
528 | /* Add the STP header */ | |
529 | dlen = skb->len; | |
530 | shdr = skb_push(skb, sizeof(*shdr)); | |
531 | shdr->prefix = 0x80; | |
532 | shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12)); | |
533 | shdr->cs = 0; /* MT7622 doesn't care about checksum value */ | |
534 | ||
535 | /* Add the STP trailer */ | |
536 | skb_put_zero(skb, MTK_STP_TLR_SIZE); | |
537 | ||
538 | skb_queue_tail(&bdev->txq, skb); | |
539 | ||
540 | btmtkuart_tx_wakeup(bdev); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static int btmtkuart_probe(struct serdev_device *serdev) | |
545 | { | |
546 | struct btmtkuart_dev *bdev; | |
547 | struct hci_dev *hdev; | |
548 | ||
549 | bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL); | |
550 | if (!bdev) | |
551 | return -ENOMEM; | |
552 | ||
553 | bdev->clk = devm_clk_get(&serdev->dev, "ref"); | |
554 | if (IS_ERR(bdev->clk)) | |
555 | return PTR_ERR(bdev->clk); | |
556 | ||
557 | bdev->serdev = serdev; | |
558 | serdev_device_set_drvdata(serdev, bdev); | |
559 | ||
560 | serdev_device_set_client_ops(serdev, &btmtkuart_client_ops); | |
561 | ||
562 | INIT_WORK(&bdev->tx_work, btmtkuart_tx_work); | |
563 | skb_queue_head_init(&bdev->txq); | |
564 | ||
565 | /* Initialize and register HCI device */ | |
566 | hdev = hci_alloc_dev(); | |
567 | if (!hdev) { | |
568 | dev_err(&serdev->dev, "Can't allocate HCI device\n"); | |
569 | return -ENOMEM; | |
570 | } | |
571 | ||
572 | bdev->hdev = hdev; | |
573 | ||
574 | hdev->bus = HCI_UART; | |
575 | hci_set_drvdata(hdev, bdev); | |
576 | ||
577 | hdev->open = btmtkuart_open; | |
578 | hdev->close = btmtkuart_close; | |
579 | hdev->flush = btmtkuart_flush; | |
580 | hdev->setup = btmtkuart_setup; | |
581 | hdev->shutdown = btmtkuart_shutdown; | |
582 | hdev->send = btmtkuart_send_frame; | |
583 | SET_HCIDEV_DEV(hdev, &serdev->dev); | |
584 | ||
585 | hdev->manufacturer = 70; | |
586 | set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); | |
587 | ||
588 | if (hci_register_dev(hdev) < 0) { | |
589 | dev_err(&serdev->dev, "Can't register HCI device\n"); | |
590 | hci_free_dev(hdev); | |
591 | return -ENODEV; | |
592 | } | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | static void btmtkuart_remove(struct serdev_device *serdev) | |
598 | { | |
599 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
600 | struct hci_dev *hdev = bdev->hdev; | |
601 | ||
602 | hci_unregister_dev(hdev); | |
603 | hci_free_dev(hdev); | |
604 | } | |
605 | ||
606 | #ifdef CONFIG_OF | |
607 | static const struct of_device_id mtk_of_match_table[] = { | |
608 | { .compatible = "mediatek,mt7622-bluetooth"}, | |
609 | { } | |
610 | }; | |
611 | MODULE_DEVICE_TABLE(of, mtk_of_match_table); | |
612 | #endif | |
613 | ||
614 | static struct serdev_device_driver btmtkuart_driver = { | |
615 | .probe = btmtkuart_probe, | |
616 | .remove = btmtkuart_remove, | |
617 | .driver = { | |
618 | .name = "btmtkuart", | |
619 | .of_match_table = of_match_ptr(mtk_of_match_table), | |
620 | }, | |
621 | }; | |
622 | ||
623 | module_serdev_device_driver(btmtkuart_driver); | |
624 | ||
625 | MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); | |
626 | MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION); | |
627 | MODULE_VERSION(VERSION); | |
628 | MODULE_LICENSE("GPL"); | |
629 | MODULE_FIRMWARE(FIRMWARE_MT7622); |