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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> | |
22eaf6c9 | 15 | #include <linux/gpio/consumer.h> |
e0b67035 | 16 | #include <linux/iopoll.h> |
7237c4c9 SW |
17 | #include <linux/kernel.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
22eaf6c9 SW |
20 | #include <linux/of_device.h> |
21 | #include <linux/pinctrl/consumer.h> | |
7237c4c9 | 22 | #include <linux/pm_runtime.h> |
22eaf6c9 | 23 | #include <linux/regulator/consumer.h> |
7237c4c9 SW |
24 | #include <linux/serdev.h> |
25 | #include <linux/skbuff.h> | |
26 | ||
27 | #include <net/bluetooth/bluetooth.h> | |
28 | #include <net/bluetooth/hci_core.h> | |
29 | ||
30 | #include "h4_recv.h" | |
31 | ||
22eaf6c9 | 32 | #define VERSION "0.2" |
7237c4c9 SW |
33 | |
34 | #define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin" | |
22eaf6c9 SW |
35 | #define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin" |
36 | #define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin" | |
7237c4c9 SW |
37 | |
38 | #define MTK_STP_TLR_SIZE 2 | |
39 | ||
40 | #define BTMTKUART_TX_STATE_ACTIVE 1 | |
41 | #define BTMTKUART_TX_STATE_WAKEUP 2 | |
42 | #define BTMTKUART_TX_WAIT_VND_EVT 3 | |
22eaf6c9 SW |
43 | #define BTMTKUART_REQUIRED_WAKEUP 4 |
44 | ||
45 | #define BTMTKUART_FLAG_STANDALONE_HW BIT(0) | |
7237c4c9 SW |
46 | |
47 | enum { | |
48 | MTK_WMT_PATCH_DWNLD = 0x1, | |
22eaf6c9 SW |
49 | MTK_WMT_TEST = 0x2, |
50 | MTK_WMT_WAKEUP = 0x3, | |
51 | MTK_WMT_HIF = 0x4, | |
7237c4c9 | 52 | MTK_WMT_FUNC_CTRL = 0x6, |
e0b67035 SW |
53 | MTK_WMT_RST = 0x7, |
54 | MTK_WMT_SEMAPHORE = 0x17, | |
55 | }; | |
56 | ||
57 | enum { | |
58 | BTMTK_WMT_INVALID, | |
59 | BTMTK_WMT_PATCH_UNDONE, | |
60 | BTMTK_WMT_PATCH_DONE, | |
61 | BTMTK_WMT_ON_UNDONE, | |
62 | BTMTK_WMT_ON_DONE, | |
63 | BTMTK_WMT_ON_PROGRESS, | |
7237c4c9 SW |
64 | }; |
65 | ||
66 | struct mtk_stp_hdr { | |
67 | u8 prefix; | |
68 | __be16 dlen; | |
69 | u8 cs; | |
70 | } __packed; | |
71 | ||
22eaf6c9 SW |
72 | struct btmtkuart_data { |
73 | unsigned int flags; | |
74 | const char *fwname; | |
75 | }; | |
76 | ||
7237c4c9 SW |
77 | struct mtk_wmt_hdr { |
78 | u8 dir; | |
79 | u8 op; | |
80 | __le16 dlen; | |
81 | u8 flag; | |
82 | } __packed; | |
83 | ||
84 | struct mtk_hci_wmt_cmd { | |
85 | struct mtk_wmt_hdr hdr; | |
86 | u8 data[256]; | |
87 | } __packed; | |
88 | ||
e0b67035 SW |
89 | struct btmtk_hci_wmt_evt { |
90 | struct hci_event_hdr hhdr; | |
91 | struct mtk_wmt_hdr whdr; | |
92 | } __packed; | |
93 | ||
94 | struct btmtk_hci_wmt_evt_funcc { | |
95 | struct btmtk_hci_wmt_evt hwhdr; | |
96 | __be16 status; | |
97 | } __packed; | |
98 | ||
99 | struct btmtk_tci_sleep { | |
100 | u8 mode; | |
101 | __le16 duration; | |
102 | __le16 host_duration; | |
103 | u8 host_wakeup_pin; | |
104 | u8 time_compensation; | |
105 | } __packed; | |
106 | ||
88e5f366 SW |
107 | struct btmtk_hci_wmt_params { |
108 | u8 op; | |
109 | u8 flag; | |
110 | u16 dlen; | |
111 | const void *data; | |
112 | u32 *status; | |
113 | }; | |
114 | ||
7237c4c9 SW |
115 | struct btmtkuart_dev { |
116 | struct hci_dev *hdev; | |
117 | struct serdev_device *serdev; | |
7237c4c9 | 118 | |
05582561 SW |
119 | struct clk *clk; |
120 | struct clk *osc; | |
22eaf6c9 SW |
121 | struct regulator *vcc; |
122 | struct gpio_desc *reset; | |
a3cb6d60 | 123 | struct gpio_desc *boot; |
22eaf6c9 SW |
124 | struct pinctrl *pinctrl; |
125 | struct pinctrl_state *pins_runtime; | |
126 | struct pinctrl_state *pins_boot; | |
127 | speed_t desired_speed; | |
128 | speed_t curr_speed; | |
129 | ||
7237c4c9 SW |
130 | struct work_struct tx_work; |
131 | unsigned long tx_state; | |
132 | struct sk_buff_head txq; | |
133 | ||
134 | struct sk_buff *rx_skb; | |
e0b67035 | 135 | struct sk_buff *evt_skb; |
7237c4c9 SW |
136 | |
137 | u8 stp_pad[6]; | |
138 | u8 stp_cursor; | |
139 | u16 stp_dlen; | |
22eaf6c9 SW |
140 | |
141 | const struct btmtkuart_data *data; | |
7237c4c9 SW |
142 | }; |
143 | ||
22eaf6c9 SW |
144 | #define btmtkuart_is_standalone(bdev) \ |
145 | ((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW) | |
146 | #define btmtkuart_is_builtin_soc(bdev) \ | |
147 | !((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW) | |
148 | ||
88e5f366 SW |
149 | static int mtk_hci_wmt_sync(struct hci_dev *hdev, |
150 | struct btmtk_hci_wmt_params *wmt_params) | |
7237c4c9 SW |
151 | { |
152 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
e0b67035 SW |
153 | struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc; |
154 | u32 hlen, status = BTMTK_WMT_INVALID; | |
155 | struct btmtk_hci_wmt_evt *wmt_evt; | |
7237c4c9 SW |
156 | struct mtk_hci_wmt_cmd wc; |
157 | struct mtk_wmt_hdr *hdr; | |
7237c4c9 SW |
158 | int err; |
159 | ||
88e5f366 | 160 | hlen = sizeof(*hdr) + wmt_params->dlen; |
7237c4c9 SW |
161 | if (hlen > 255) |
162 | return -EINVAL; | |
163 | ||
164 | hdr = (struct mtk_wmt_hdr *)&wc; | |
165 | hdr->dir = 1; | |
88e5f366 SW |
166 | hdr->op = wmt_params->op; |
167 | hdr->dlen = cpu_to_le16(wmt_params->dlen + 1); | |
168 | hdr->flag = wmt_params->flag; | |
169 | memcpy(wc.data, wmt_params->data, wmt_params->dlen); | |
7237c4c9 SW |
170 | |
171 | set_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); | |
172 | ||
173 | err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc); | |
174 | if (err < 0) { | |
175 | clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); | |
176 | return err; | |
177 | } | |
178 | ||
179 | /* The vendor specific WMT commands are all answered by a vendor | |
180 | * specific event and will not have the Command Status or Command | |
181 | * Complete as with usual HCI command flow control. | |
182 | * | |
183 | * After sending the command, wait for BTMTKUART_TX_WAIT_VND_EVT | |
adf5d730 | 184 | * state to be cleared. The driver specific event receive routine |
7237c4c9 SW |
185 | * will clear that state and with that indicate completion of the |
186 | * WMT command. | |
187 | */ | |
188 | err = wait_on_bit_timeout(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT, | |
189 | TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT); | |
190 | if (err == -EINTR) { | |
191 | bt_dev_err(hdev, "Execution of wmt command interrupted"); | |
77f328db | 192 | clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); |
7237c4c9 SW |
193 | return err; |
194 | } | |
195 | ||
196 | if (err) { | |
197 | bt_dev_err(hdev, "Execution of wmt command timed out"); | |
77f328db | 198 | clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); |
7237c4c9 SW |
199 | return -ETIMEDOUT; |
200 | } | |
201 | ||
e0b67035 SW |
202 | /* Parse and handle the return WMT event */ |
203 | wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data; | |
204 | if (wmt_evt->whdr.op != hdr->op) { | |
205 | bt_dev_err(hdev, "Wrong op received %d expected %d", | |
206 | wmt_evt->whdr.op, hdr->op); | |
207 | err = -EIO; | |
208 | goto err_free_skb; | |
209 | } | |
210 | ||
211 | switch (wmt_evt->whdr.op) { | |
212 | case MTK_WMT_SEMAPHORE: | |
213 | if (wmt_evt->whdr.flag == 2) | |
214 | status = BTMTK_WMT_PATCH_UNDONE; | |
215 | else | |
216 | status = BTMTK_WMT_PATCH_DONE; | |
217 | break; | |
218 | case MTK_WMT_FUNC_CTRL: | |
219 | wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt; | |
220 | if (be16_to_cpu(wmt_evt_funcc->status) == 0x404) | |
221 | status = BTMTK_WMT_ON_DONE; | |
222 | else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420) | |
223 | status = BTMTK_WMT_ON_PROGRESS; | |
224 | else | |
225 | status = BTMTK_WMT_ON_UNDONE; | |
226 | break; | |
227 | } | |
228 | ||
229 | if (wmt_params->status) | |
230 | *wmt_params->status = status; | |
231 | ||
232 | err_free_skb: | |
233 | kfree_skb(bdev->evt_skb); | |
234 | bdev->evt_skb = NULL; | |
235 | ||
236 | return err; | |
7237c4c9 SW |
237 | } |
238 | ||
22eaf6c9 | 239 | static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname) |
7237c4c9 | 240 | { |
88e5f366 | 241 | struct btmtk_hci_wmt_params wmt_params; |
7237c4c9 SW |
242 | const struct firmware *fw; |
243 | const u8 *fw_ptr; | |
244 | size_t fw_size; | |
245 | int err, dlen; | |
246 | u8 flag; | |
247 | ||
22eaf6c9 | 248 | err = request_firmware(&fw, fwname, &hdev->dev); |
7237c4c9 SW |
249 | if (err < 0) { |
250 | bt_dev_err(hdev, "Failed to load firmware file (%d)", err); | |
251 | return err; | |
252 | } | |
253 | ||
254 | fw_ptr = fw->data; | |
255 | fw_size = fw->size; | |
256 | ||
257 | /* The size of patch header is 30 bytes, should be skip */ | |
addb3ffb GS |
258 | if (fw_size < 30) { |
259 | err = -EINVAL; | |
260 | goto free_fw; | |
261 | } | |
7237c4c9 SW |
262 | |
263 | fw_size -= 30; | |
264 | fw_ptr += 30; | |
265 | flag = 1; | |
266 | ||
88e5f366 SW |
267 | wmt_params.op = MTK_WMT_PATCH_DWNLD; |
268 | wmt_params.status = NULL; | |
269 | ||
7237c4c9 SW |
270 | while (fw_size > 0) { |
271 | dlen = min_t(int, 250, fw_size); | |
272 | ||
273 | /* Tell device the position in sequence */ | |
274 | if (fw_size - dlen <= 0) | |
275 | flag = 3; | |
276 | else if (fw_size < fw->size - 30) | |
277 | flag = 2; | |
278 | ||
88e5f366 SW |
279 | wmt_params.flag = flag; |
280 | wmt_params.dlen = dlen; | |
281 | wmt_params.data = fw_ptr; | |
282 | ||
283 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
7237c4c9 SW |
284 | if (err < 0) { |
285 | bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", | |
286 | err); | |
e0b67035 | 287 | goto free_fw; |
7237c4c9 SW |
288 | } |
289 | ||
290 | fw_size -= dlen; | |
291 | fw_ptr += dlen; | |
292 | } | |
293 | ||
e0b67035 SW |
294 | wmt_params.op = MTK_WMT_RST; |
295 | wmt_params.flag = 4; | |
296 | wmt_params.dlen = 0; | |
297 | wmt_params.data = NULL; | |
298 | wmt_params.status = NULL; | |
299 | ||
300 | /* Activate funciton the firmware providing to */ | |
301 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
302 | if (err < 0) { | |
303 | bt_dev_err(hdev, "Failed to send wmt rst (%d)", err); | |
304 | goto free_fw; | |
305 | } | |
306 | ||
307 | /* Wait a few moments for firmware activation done */ | |
308 | usleep_range(10000, 12000); | |
309 | ||
addb3ffb | 310 | free_fw: |
7237c4c9 | 311 | release_firmware(fw); |
7237c4c9 SW |
312 | return err; |
313 | } | |
314 | ||
315 | static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb) | |
316 | { | |
317 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
318 | struct hci_event_hdr *hdr = (void *)skb->data; | |
319 | int err; | |
320 | ||
321 | /* Fix up the vendor event id with 0xff for vendor specific instead | |
322 | * of 0xe4 so that event send via monitoring socket can be parsed | |
323 | * properly. | |
324 | */ | |
325 | if (hdr->evt == 0xe4) | |
326 | hdr->evt = HCI_EV_VENDOR; | |
327 | ||
e0b67035 SW |
328 | /* When someone waits for the WMT event, the skb is being cloned |
329 | * and being processed the events from there then. | |
330 | */ | |
331 | if (test_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state)) { | |
332 | bdev->evt_skb = skb_clone(skb, GFP_KERNEL); | |
333 | if (!bdev->evt_skb) { | |
334 | err = -ENOMEM; | |
335 | goto err_out; | |
336 | } | |
337 | } | |
338 | ||
7237c4c9 | 339 | err = hci_recv_frame(hdev, skb); |
e0b67035 SW |
340 | if (err < 0) |
341 | goto err_free_skb; | |
7237c4c9 SW |
342 | |
343 | if (hdr->evt == HCI_EV_VENDOR) { | |
344 | if (test_and_clear_bit(BTMTKUART_TX_WAIT_VND_EVT, | |
345 | &bdev->tx_state)) { | |
346 | /* Barrier to sync with other CPUs */ | |
347 | smp_mb__after_atomic(); | |
348 | wake_up_bit(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT); | |
349 | } | |
350 | } | |
351 | ||
e0b67035 SW |
352 | return 0; |
353 | ||
354 | err_free_skb: | |
355 | kfree_skb(bdev->evt_skb); | |
356 | bdev->evt_skb = NULL; | |
357 | ||
358 | err_out: | |
7237c4c9 SW |
359 | return err; |
360 | } | |
361 | ||
362 | static const struct h4_recv_pkt mtk_recv_pkts[] = { | |
363 | { H4_RECV_ACL, .recv = hci_recv_frame }, | |
364 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
365 | { H4_RECV_EVENT, .recv = btmtkuart_recv_event }, | |
366 | }; | |
367 | ||
368 | static void btmtkuart_tx_work(struct work_struct *work) | |
369 | { | |
370 | struct btmtkuart_dev *bdev = container_of(work, struct btmtkuart_dev, | |
371 | tx_work); | |
372 | struct serdev_device *serdev = bdev->serdev; | |
373 | struct hci_dev *hdev = bdev->hdev; | |
374 | ||
375 | while (1) { | |
376 | clear_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); | |
377 | ||
378 | while (1) { | |
379 | struct sk_buff *skb = skb_dequeue(&bdev->txq); | |
380 | int len; | |
381 | ||
382 | if (!skb) | |
383 | break; | |
384 | ||
385 | len = serdev_device_write_buf(serdev, skb->data, | |
386 | skb->len); | |
387 | hdev->stat.byte_tx += len; | |
388 | ||
389 | skb_pull(skb, len); | |
390 | if (skb->len > 0) { | |
391 | skb_queue_head(&bdev->txq, skb); | |
392 | break; | |
393 | } | |
394 | ||
395 | switch (hci_skb_pkt_type(skb)) { | |
396 | case HCI_COMMAND_PKT: | |
397 | hdev->stat.cmd_tx++; | |
398 | break; | |
399 | case HCI_ACLDATA_PKT: | |
400 | hdev->stat.acl_tx++; | |
401 | break; | |
402 | case HCI_SCODATA_PKT: | |
403 | hdev->stat.sco_tx++; | |
404 | break; | |
405 | } | |
406 | ||
407 | kfree_skb(skb); | |
408 | } | |
409 | ||
410 | if (!test_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state)) | |
411 | break; | |
412 | } | |
413 | ||
414 | clear_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state); | |
415 | } | |
416 | ||
417 | static void btmtkuart_tx_wakeup(struct btmtkuart_dev *bdev) | |
418 | { | |
419 | if (test_and_set_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state)) | |
420 | set_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); | |
421 | ||
422 | schedule_work(&bdev->tx_work); | |
423 | } | |
424 | ||
425 | static const unsigned char * | |
426 | mtk_stp_split(struct btmtkuart_dev *bdev, const unsigned char *data, int count, | |
427 | int *sz_h4) | |
428 | { | |
429 | struct mtk_stp_hdr *shdr; | |
430 | ||
431 | /* The cursor is reset when all the data of STP is consumed out */ | |
432 | if (!bdev->stp_dlen && bdev->stp_cursor >= 6) | |
433 | bdev->stp_cursor = 0; | |
434 | ||
435 | /* Filling pad until all STP info is obtained */ | |
436 | while (bdev->stp_cursor < 6 && count > 0) { | |
437 | bdev->stp_pad[bdev->stp_cursor] = *data; | |
438 | bdev->stp_cursor++; | |
439 | data++; | |
440 | count--; | |
441 | } | |
442 | ||
443 | /* Retrieve STP info and have a sanity check */ | |
444 | if (!bdev->stp_dlen && bdev->stp_cursor >= 6) { | |
445 | shdr = (struct mtk_stp_hdr *)&bdev->stp_pad[2]; | |
446 | bdev->stp_dlen = be16_to_cpu(shdr->dlen) & 0x0fff; | |
447 | ||
448 | /* Resync STP when unexpected data is being read */ | |
449 | if (shdr->prefix != 0x80 || bdev->stp_dlen > 2048) { | |
450 | bt_dev_err(bdev->hdev, "stp format unexpect (%d, %d)", | |
451 | shdr->prefix, bdev->stp_dlen); | |
452 | bdev->stp_cursor = 2; | |
453 | bdev->stp_dlen = 0; | |
454 | } | |
455 | } | |
456 | ||
457 | /* Directly quit when there's no data found for H4 can process */ | |
458 | if (count <= 0) | |
459 | return NULL; | |
460 | ||
461 | /* Tranlate to how much the size of data H4 can handle so far */ | |
462 | *sz_h4 = min_t(int, count, bdev->stp_dlen); | |
463 | ||
464 | /* Update the remaining size of STP packet */ | |
465 | bdev->stp_dlen -= *sz_h4; | |
466 | ||
467 | /* Data points to STP payload which can be handled by H4 */ | |
468 | return data; | |
469 | } | |
470 | ||
471 | static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) | |
472 | { | |
473 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
474 | const unsigned char *p_left = data, *p_h4; | |
475 | int sz_left = count, sz_h4, adv; | |
476 | int err; | |
477 | ||
478 | while (sz_left > 0) { | |
479 | /* The serial data received from MT7622 BT controller is | |
480 | * at all time padded around with the STP header and tailer. | |
481 | * | |
482 | * A full STP packet is looking like | |
483 | * ----------------------------------- | |
484 | * | STP header | H:4 | STP tailer | | |
485 | * ----------------------------------- | |
486 | * but it doesn't guarantee to contain a full H:4 packet which | |
487 | * means that it's possible for multiple STP packets forms a | |
488 | * full H:4 packet that means extra STP header + length doesn't | |
489 | * indicate a full H:4 frame, things can fragment. Whose length | |
490 | * recorded in STP header just shows up the most length the | |
491 | * H:4 engine can handle currently. | |
492 | */ | |
493 | ||
494 | p_h4 = mtk_stp_split(bdev, p_left, sz_left, &sz_h4); | |
495 | if (!p_h4) | |
496 | break; | |
497 | ||
498 | adv = p_h4 - p_left; | |
499 | sz_left -= adv; | |
500 | p_left += adv; | |
501 | ||
502 | bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, p_h4, | |
503 | sz_h4, mtk_recv_pkts, | |
330ad75f | 504 | ARRAY_SIZE(mtk_recv_pkts)); |
7237c4c9 SW |
505 | if (IS_ERR(bdev->rx_skb)) { |
506 | err = PTR_ERR(bdev->rx_skb); | |
507 | bt_dev_err(bdev->hdev, | |
508 | "Frame reassembly failed (%d)", err); | |
509 | bdev->rx_skb = NULL; | |
510 | return err; | |
511 | } | |
512 | ||
513 | sz_left -= sz_h4; | |
514 | p_left += sz_h4; | |
515 | } | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data, | |
521 | size_t count) | |
522 | { | |
523 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
524 | int err; | |
525 | ||
526 | err = btmtkuart_recv(bdev->hdev, data, count); | |
527 | if (err < 0) | |
528 | return err; | |
529 | ||
530 | bdev->hdev->stat.byte_rx += count; | |
531 | ||
532 | return count; | |
533 | } | |
534 | ||
535 | static void btmtkuart_write_wakeup(struct serdev_device *serdev) | |
536 | { | |
537 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
538 | ||
539 | btmtkuart_tx_wakeup(bdev); | |
540 | } | |
541 | ||
542 | static const struct serdev_device_ops btmtkuart_client_ops = { | |
543 | .receive_buf = btmtkuart_receive_buf, | |
544 | .write_wakeup = btmtkuart_write_wakeup, | |
545 | }; | |
546 | ||
547 | static int btmtkuart_open(struct hci_dev *hdev) | |
548 | { | |
549 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
550 | struct device *dev; | |
551 | int err; | |
552 | ||
553 | err = serdev_device_open(bdev->serdev); | |
554 | if (err) { | |
555 | bt_dev_err(hdev, "Unable to open UART device %s", | |
556 | dev_name(&bdev->serdev->dev)); | |
557 | goto err_open; | |
558 | } | |
559 | ||
22eaf6c9 SW |
560 | if (btmtkuart_is_standalone(bdev)) { |
561 | if (bdev->curr_speed != bdev->desired_speed) | |
562 | err = serdev_device_set_baudrate(bdev->serdev, | |
563 | 115200); | |
564 | else | |
565 | err = serdev_device_set_baudrate(bdev->serdev, | |
566 | bdev->desired_speed); | |
567 | ||
568 | if (err < 0) { | |
569 | bt_dev_err(hdev, "Unable to set baudrate UART device %s", | |
570 | dev_name(&bdev->serdev->dev)); | |
571 | goto err_serdev_close; | |
572 | } | |
573 | ||
574 | serdev_device_set_flow_control(bdev->serdev, false); | |
575 | } | |
576 | ||
7237c4c9 SW |
577 | bdev->stp_cursor = 2; |
578 | bdev->stp_dlen = 0; | |
579 | ||
580 | dev = &bdev->serdev->dev; | |
581 | ||
582 | /* Enable the power domain and clock the device requires */ | |
583 | pm_runtime_enable(dev); | |
584 | err = pm_runtime_get_sync(dev); | |
585 | if (err < 0) { | |
586 | pm_runtime_put_noidle(dev); | |
587 | goto err_disable_rpm; | |
588 | } | |
589 | ||
590 | err = clk_prepare_enable(bdev->clk); | |
591 | if (err < 0) | |
592 | goto err_put_rpm; | |
593 | ||
594 | return 0; | |
595 | ||
596 | err_put_rpm: | |
597 | pm_runtime_put_sync(dev); | |
598 | err_disable_rpm: | |
599 | pm_runtime_disable(dev); | |
22eaf6c9 SW |
600 | err_serdev_close: |
601 | serdev_device_close(bdev->serdev); | |
7237c4c9 SW |
602 | err_open: |
603 | return err; | |
604 | } | |
605 | ||
606 | static int btmtkuart_close(struct hci_dev *hdev) | |
607 | { | |
608 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
609 | struct device *dev = &bdev->serdev->dev; | |
610 | ||
611 | /* Shutdown the clock and power domain the device requires */ | |
612 | clk_disable_unprepare(bdev->clk); | |
613 | pm_runtime_put_sync(dev); | |
614 | pm_runtime_disable(dev); | |
615 | ||
616 | serdev_device_close(bdev->serdev); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | static int btmtkuart_flush(struct hci_dev *hdev) | |
622 | { | |
623 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
624 | ||
625 | /* Flush any pending characters */ | |
626 | serdev_device_write_flush(bdev->serdev); | |
627 | skb_queue_purge(&bdev->txq); | |
628 | ||
629 | cancel_work_sync(&bdev->tx_work); | |
630 | ||
631 | kfree_skb(bdev->rx_skb); | |
632 | bdev->rx_skb = NULL; | |
633 | ||
634 | bdev->stp_cursor = 2; | |
635 | bdev->stp_dlen = 0; | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
e0b67035 SW |
640 | static int btmtkuart_func_query(struct hci_dev *hdev) |
641 | { | |
642 | struct btmtk_hci_wmt_params wmt_params; | |
643 | int status, err; | |
644 | u8 param = 0; | |
645 | ||
646 | /* Query whether the function is enabled */ | |
647 | wmt_params.op = MTK_WMT_FUNC_CTRL; | |
648 | wmt_params.flag = 4; | |
649 | wmt_params.dlen = sizeof(param); | |
650 | wmt_params.data = ¶m; | |
651 | wmt_params.status = &status; | |
652 | ||
653 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
654 | if (err < 0) { | |
655 | bt_dev_err(hdev, "Failed to query function status (%d)", err); | |
656 | return err; | |
657 | } | |
658 | ||
659 | return status; | |
660 | } | |
661 | ||
22eaf6c9 SW |
662 | static int btmtkuart_change_baudrate(struct hci_dev *hdev) |
663 | { | |
664 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
665 | struct btmtk_hci_wmt_params wmt_params; | |
cac63f9b | 666 | __le32 baudrate; |
22eaf6c9 SW |
667 | u8 param; |
668 | int err; | |
669 | ||
670 | /* Indicate the device to enter the probe state the host is | |
671 | * ready to change a new baudrate. | |
672 | */ | |
673 | baudrate = cpu_to_le32(bdev->desired_speed); | |
674 | wmt_params.op = MTK_WMT_HIF; | |
675 | wmt_params.flag = 1; | |
676 | wmt_params.dlen = 4; | |
677 | wmt_params.data = &baudrate; | |
678 | wmt_params.status = NULL; | |
679 | ||
680 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
681 | if (err < 0) { | |
682 | bt_dev_err(hdev, "Failed to device baudrate (%d)", err); | |
683 | return err; | |
684 | } | |
685 | ||
686 | err = serdev_device_set_baudrate(bdev->serdev, | |
687 | bdev->desired_speed); | |
688 | if (err < 0) { | |
689 | bt_dev_err(hdev, "Failed to set up host baudrate (%d)", | |
690 | err); | |
691 | return err; | |
692 | } | |
693 | ||
694 | serdev_device_set_flow_control(bdev->serdev, false); | |
695 | ||
696 | /* Send a dummy byte 0xff to activate the new baudrate */ | |
697 | param = 0xff; | |
d3a0fe6b | 698 | err = serdev_device_write_buf(bdev->serdev, ¶m, sizeof(param)); |
22eaf6c9 SW |
699 | if (err < 0 || err < sizeof(param)) |
700 | return err; | |
701 | ||
702 | serdev_device_wait_until_sent(bdev->serdev, 0); | |
703 | ||
704 | /* Wait some time for the device changing baudrate done */ | |
705 | usleep_range(20000, 22000); | |
706 | ||
707 | /* Test the new baudrate */ | |
708 | wmt_params.op = MTK_WMT_TEST; | |
709 | wmt_params.flag = 7; | |
710 | wmt_params.dlen = 0; | |
711 | wmt_params.data = NULL; | |
712 | wmt_params.status = NULL; | |
713 | ||
714 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
715 | if (err < 0) { | |
716 | bt_dev_err(hdev, "Failed to test new baudrate (%d)", | |
717 | err); | |
718 | return err; | |
719 | } | |
720 | ||
721 | bdev->curr_speed = bdev->desired_speed; | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
7237c4c9 SW |
726 | static int btmtkuart_setup(struct hci_dev *hdev) |
727 | { | |
22eaf6c9 | 728 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); |
88e5f366 | 729 | struct btmtk_hci_wmt_params wmt_params; |
e0b67035 SW |
730 | ktime_t calltime, delta, rettime; |
731 | struct btmtk_tci_sleep tci_sleep; | |
732 | unsigned long long duration; | |
733 | struct sk_buff *skb; | |
734 | int err, status; | |
7237c4c9 | 735 | u8 param = 0x1; |
7237c4c9 | 736 | |
e0b67035 | 737 | calltime = ktime_get(); |
7237c4c9 | 738 | |
22eaf6c9 SW |
739 | /* Wakeup MCUSYS is required for certain devices before we start to |
740 | * do any setups. | |
741 | */ | |
742 | if (test_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state)) { | |
743 | wmt_params.op = MTK_WMT_WAKEUP; | |
744 | wmt_params.flag = 3; | |
745 | wmt_params.dlen = 0; | |
746 | wmt_params.data = NULL; | |
747 | wmt_params.status = NULL; | |
748 | ||
749 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
750 | if (err < 0) { | |
751 | bt_dev_err(hdev, "Failed to wakeup the chip (%d)", err); | |
752 | return err; | |
753 | } | |
754 | ||
755 | clear_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state); | |
756 | } | |
757 | ||
758 | if (btmtkuart_is_standalone(bdev)) | |
759 | btmtkuart_change_baudrate(hdev); | |
760 | ||
e0b67035 SW |
761 | /* Query whether the firmware is already download */ |
762 | wmt_params.op = MTK_WMT_SEMAPHORE; | |
763 | wmt_params.flag = 1; | |
88e5f366 SW |
764 | wmt_params.dlen = 0; |
765 | wmt_params.data = NULL; | |
e0b67035 | 766 | wmt_params.status = &status; |
88e5f366 | 767 | |
88e5f366 | 768 | err = mtk_hci_wmt_sync(hdev, &wmt_params); |
7237c4c9 | 769 | if (err < 0) { |
e0b67035 SW |
770 | bt_dev_err(hdev, "Failed to query firmware status (%d)", err); |
771 | return err; | |
772 | } | |
773 | ||
774 | if (status == BTMTK_WMT_PATCH_DONE) { | |
775 | bt_dev_info(hdev, "Firmware already downloaded"); | |
776 | goto ignore_setup_fw; | |
777 | } | |
778 | ||
779 | /* Setup a firmware which the device definitely requires */ | |
22eaf6c9 | 780 | err = mtk_setup_firmware(hdev, bdev->data->fwname); |
e0b67035 | 781 | if (err < 0) |
7237c4c9 | 782 | return err; |
e0b67035 SW |
783 | |
784 | ignore_setup_fw: | |
785 | /* Query whether the device is already enabled */ | |
786 | err = readx_poll_timeout(btmtkuart_func_query, hdev, status, | |
787 | status < 0 || status != BTMTK_WMT_ON_PROGRESS, | |
788 | 2000, 5000000); | |
789 | /* -ETIMEDOUT happens */ | |
790 | if (err < 0) | |
791 | return err; | |
792 | ||
793 | /* The other errors happen in btusb_mtk_func_query */ | |
794 | if (status < 0) | |
795 | return status; | |
796 | ||
797 | if (status == BTMTK_WMT_ON_DONE) { | |
798 | bt_dev_info(hdev, "function already on"); | |
799 | goto ignore_func_on; | |
7237c4c9 SW |
800 | } |
801 | ||
802 | /* Enable Bluetooth protocol */ | |
88e5f366 SW |
803 | wmt_params.op = MTK_WMT_FUNC_CTRL; |
804 | wmt_params.flag = 0; | |
805 | wmt_params.dlen = sizeof(param); | |
806 | wmt_params.data = ¶m; | |
807 | wmt_params.status = NULL; | |
808 | ||
809 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
7237c4c9 SW |
810 | if (err < 0) { |
811 | bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); | |
812 | return err; | |
813 | } | |
814 | ||
e0b67035 SW |
815 | ignore_func_on: |
816 | /* Apply the low power environment setup */ | |
817 | tci_sleep.mode = 0x5; | |
818 | tci_sleep.duration = cpu_to_le16(0x640); | |
819 | tci_sleep.host_duration = cpu_to_le16(0x640); | |
820 | tci_sleep.host_wakeup_pin = 0; | |
821 | tci_sleep.time_compensation = 0; | |
822 | ||
823 | skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep, | |
824 | HCI_INIT_TIMEOUT); | |
825 | if (IS_ERR(skb)) { | |
826 | err = PTR_ERR(skb); | |
827 | bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); | |
828 | return err; | |
829 | } | |
830 | kfree_skb(skb); | |
831 | ||
832 | rettime = ktime_get(); | |
833 | delta = ktime_sub(rettime, calltime); | |
834 | duration = (unsigned long long)ktime_to_ns(delta) >> 10; | |
835 | ||
836 | bt_dev_info(hdev, "Device setup in %llu usecs", duration); | |
837 | ||
7237c4c9 SW |
838 | return 0; |
839 | } | |
840 | ||
841 | static int btmtkuart_shutdown(struct hci_dev *hdev) | |
842 | { | |
88e5f366 | 843 | struct btmtk_hci_wmt_params wmt_params; |
7237c4c9 SW |
844 | u8 param = 0x0; |
845 | int err; | |
846 | ||
847 | /* Disable the device */ | |
88e5f366 SW |
848 | wmt_params.op = MTK_WMT_FUNC_CTRL; |
849 | wmt_params.flag = 0; | |
850 | wmt_params.dlen = sizeof(param); | |
851 | wmt_params.data = ¶m; | |
852 | wmt_params.status = NULL; | |
853 | ||
854 | err = mtk_hci_wmt_sync(hdev, &wmt_params); | |
7237c4c9 SW |
855 | if (err < 0) { |
856 | bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); | |
857 | return err; | |
858 | } | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | static int btmtkuart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) | |
864 | { | |
865 | struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); | |
866 | struct mtk_stp_hdr *shdr; | |
867 | int err, dlen, type = 0; | |
868 | ||
869 | /* Prepend skb with frame type */ | |
870 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); | |
871 | ||
872 | /* Make sure that there is enough rooms for STP header and trailer */ | |
873 | if (unlikely(skb_headroom(skb) < sizeof(*shdr)) || | |
874 | (skb_tailroom(skb) < MTK_STP_TLR_SIZE)) { | |
875 | err = pskb_expand_head(skb, sizeof(*shdr), MTK_STP_TLR_SIZE, | |
876 | GFP_ATOMIC); | |
877 | if (err < 0) | |
878 | return err; | |
879 | } | |
880 | ||
881 | /* Add the STP header */ | |
882 | dlen = skb->len; | |
883 | shdr = skb_push(skb, sizeof(*shdr)); | |
884 | shdr->prefix = 0x80; | |
885 | shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12)); | |
886 | shdr->cs = 0; /* MT7622 doesn't care about checksum value */ | |
887 | ||
888 | /* Add the STP trailer */ | |
889 | skb_put_zero(skb, MTK_STP_TLR_SIZE); | |
890 | ||
891 | skb_queue_tail(&bdev->txq, skb); | |
892 | ||
893 | btmtkuart_tx_wakeup(bdev); | |
894 | return 0; | |
895 | } | |
896 | ||
22eaf6c9 SW |
897 | static int btmtkuart_parse_dt(struct serdev_device *serdev) |
898 | { | |
899 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
900 | struct device_node *node = serdev->dev.of_node; | |
901 | u32 speed = 921600; | |
902 | int err; | |
903 | ||
904 | if (btmtkuart_is_standalone(bdev)) { | |
905 | of_property_read_u32(node, "current-speed", &speed); | |
906 | ||
907 | bdev->desired_speed = speed; | |
908 | ||
909 | bdev->vcc = devm_regulator_get(&serdev->dev, "vcc"); | |
910 | if (IS_ERR(bdev->vcc)) { | |
911 | err = PTR_ERR(bdev->vcc); | |
912 | return err; | |
913 | } | |
914 | ||
05582561 SW |
915 | bdev->osc = devm_clk_get_optional(&serdev->dev, "osc"); |
916 | if (IS_ERR(bdev->osc)) { | |
917 | err = PTR_ERR(bdev->osc); | |
918 | return err; | |
919 | } | |
920 | ||
a3cb6d60 SW |
921 | bdev->boot = devm_gpiod_get_optional(&serdev->dev, "boot", |
922 | GPIOD_OUT_LOW); | |
923 | if (IS_ERR(bdev->boot)) { | |
924 | err = PTR_ERR(bdev->boot); | |
925 | return err; | |
926 | } | |
927 | ||
22eaf6c9 SW |
928 | bdev->pinctrl = devm_pinctrl_get(&serdev->dev); |
929 | if (IS_ERR(bdev->pinctrl)) { | |
930 | err = PTR_ERR(bdev->pinctrl); | |
931 | return err; | |
932 | } | |
933 | ||
934 | bdev->pins_boot = pinctrl_lookup_state(bdev->pinctrl, | |
935 | "default"); | |
a3cb6d60 | 936 | if (IS_ERR(bdev->pins_boot) && !bdev->boot) { |
22eaf6c9 | 937 | err = PTR_ERR(bdev->pins_boot); |
a3cb6d60 SW |
938 | dev_err(&serdev->dev, |
939 | "Should assign RXD to LOW at boot stage\n"); | |
22eaf6c9 SW |
940 | return err; |
941 | } | |
942 | ||
943 | bdev->pins_runtime = pinctrl_lookup_state(bdev->pinctrl, | |
944 | "runtime"); | |
945 | if (IS_ERR(bdev->pins_runtime)) { | |
946 | err = PTR_ERR(bdev->pins_runtime); | |
947 | return err; | |
948 | } | |
949 | ||
950 | bdev->reset = devm_gpiod_get_optional(&serdev->dev, "reset", | |
951 | GPIOD_OUT_LOW); | |
952 | if (IS_ERR(bdev->reset)) { | |
953 | err = PTR_ERR(bdev->reset); | |
954 | return err; | |
955 | } | |
956 | } else if (btmtkuart_is_builtin_soc(bdev)) { | |
957 | bdev->clk = devm_clk_get(&serdev->dev, "ref"); | |
958 | if (IS_ERR(bdev->clk)) | |
959 | return PTR_ERR(bdev->clk); | |
960 | } | |
961 | ||
962 | return 0; | |
963 | } | |
964 | ||
7237c4c9 SW |
965 | static int btmtkuart_probe(struct serdev_device *serdev) |
966 | { | |
967 | struct btmtkuart_dev *bdev; | |
968 | struct hci_dev *hdev; | |
22eaf6c9 | 969 | int err; |
7237c4c9 SW |
970 | |
971 | bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL); | |
972 | if (!bdev) | |
973 | return -ENOMEM; | |
974 | ||
22eaf6c9 SW |
975 | bdev->data = of_device_get_match_data(&serdev->dev); |
976 | if (!bdev->data) | |
977 | return -ENODEV; | |
7237c4c9 SW |
978 | |
979 | bdev->serdev = serdev; | |
980 | serdev_device_set_drvdata(serdev, bdev); | |
981 | ||
982 | serdev_device_set_client_ops(serdev, &btmtkuart_client_ops); | |
983 | ||
22eaf6c9 SW |
984 | err = btmtkuart_parse_dt(serdev); |
985 | if (err < 0) | |
986 | return err; | |
987 | ||
7237c4c9 SW |
988 | INIT_WORK(&bdev->tx_work, btmtkuart_tx_work); |
989 | skb_queue_head_init(&bdev->txq); | |
990 | ||
991 | /* Initialize and register HCI device */ | |
992 | hdev = hci_alloc_dev(); | |
993 | if (!hdev) { | |
994 | dev_err(&serdev->dev, "Can't allocate HCI device\n"); | |
995 | return -ENOMEM; | |
996 | } | |
997 | ||
998 | bdev->hdev = hdev; | |
999 | ||
1000 | hdev->bus = HCI_UART; | |
1001 | hci_set_drvdata(hdev, bdev); | |
1002 | ||
1003 | hdev->open = btmtkuart_open; | |
1004 | hdev->close = btmtkuart_close; | |
1005 | hdev->flush = btmtkuart_flush; | |
1006 | hdev->setup = btmtkuart_setup; | |
1007 | hdev->shutdown = btmtkuart_shutdown; | |
1008 | hdev->send = btmtkuart_send_frame; | |
1009 | SET_HCIDEV_DEV(hdev, &serdev->dev); | |
1010 | ||
1011 | hdev->manufacturer = 70; | |
1012 | set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); | |
1013 | ||
22eaf6c9 | 1014 | if (btmtkuart_is_standalone(bdev)) { |
05582561 SW |
1015 | err = clk_prepare_enable(bdev->osc); |
1016 | if (err < 0) | |
4803c54c | 1017 | goto err_hci_free_dev; |
05582561 | 1018 | |
a3cb6d60 SW |
1019 | if (bdev->boot) { |
1020 | gpiod_set_value_cansleep(bdev->boot, 1); | |
1021 | } else { | |
1022 | /* Switch to the specific pin state for the booting | |
1023 | * requires. | |
1024 | */ | |
1025 | pinctrl_select_state(bdev->pinctrl, bdev->pins_boot); | |
1026 | } | |
22eaf6c9 SW |
1027 | |
1028 | /* Power on */ | |
1029 | err = regulator_enable(bdev->vcc); | |
4803c54c CY |
1030 | if (err < 0) |
1031 | goto err_clk_disable_unprepare; | |
22eaf6c9 SW |
1032 | |
1033 | /* Reset if the reset-gpios is available otherwise the board | |
1034 | * -level design should be guaranteed. | |
1035 | */ | |
1036 | if (bdev->reset) { | |
1037 | gpiod_set_value_cansleep(bdev->reset, 1); | |
1038 | usleep_range(1000, 2000); | |
1039 | gpiod_set_value_cansleep(bdev->reset, 0); | |
1040 | } | |
1041 | ||
1042 | /* Wait some time until device got ready and switch to the pin | |
1043 | * mode the device requires for UART transfers. | |
1044 | */ | |
1045 | msleep(50); | |
a3cb6d60 SW |
1046 | |
1047 | if (bdev->boot) | |
1048 | devm_gpiod_put(&serdev->dev, bdev->boot); | |
1049 | ||
22eaf6c9 SW |
1050 | pinctrl_select_state(bdev->pinctrl, bdev->pins_runtime); |
1051 | ||
1052 | /* A standalone device doesn't depends on power domain on SoC, | |
1053 | * so mark it as no callbacks. | |
1054 | */ | |
1055 | pm_runtime_no_callbacks(&serdev->dev); | |
1056 | ||
1057 | set_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state); | |
1058 | } | |
1059 | ||
1060 | err = hci_register_dev(hdev); | |
1061 | if (err < 0) { | |
7237c4c9 | 1062 | dev_err(&serdev->dev, "Can't register HCI device\n"); |
22eaf6c9 | 1063 | goto err_regulator_disable; |
7237c4c9 SW |
1064 | } |
1065 | ||
1066 | return 0; | |
22eaf6c9 SW |
1067 | |
1068 | err_regulator_disable: | |
a3cb6d60 | 1069 | if (btmtkuart_is_standalone(bdev)) |
22eaf6c9 | 1070 | regulator_disable(bdev->vcc); |
4803c54c CY |
1071 | err_clk_disable_unprepare: |
1072 | if (btmtkuart_is_standalone(bdev)) | |
1073 | clk_disable_unprepare(bdev->osc); | |
1074 | err_hci_free_dev: | |
1075 | hci_free_dev(hdev); | |
22eaf6c9 SW |
1076 | |
1077 | return err; | |
7237c4c9 SW |
1078 | } |
1079 | ||
1080 | static void btmtkuart_remove(struct serdev_device *serdev) | |
1081 | { | |
1082 | struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); | |
1083 | struct hci_dev *hdev = bdev->hdev; | |
1084 | ||
05582561 | 1085 | if (btmtkuart_is_standalone(bdev)) { |
22eaf6c9 | 1086 | regulator_disable(bdev->vcc); |
05582561 SW |
1087 | clk_disable_unprepare(bdev->osc); |
1088 | } | |
22eaf6c9 | 1089 | |
7237c4c9 SW |
1090 | hci_unregister_dev(hdev); |
1091 | hci_free_dev(hdev); | |
1092 | } | |
1093 | ||
22eaf6c9 SW |
1094 | static const struct btmtkuart_data mt7622_data = { |
1095 | .fwname = FIRMWARE_MT7622, | |
1096 | }; | |
1097 | ||
1098 | static const struct btmtkuart_data mt7663_data = { | |
1099 | .flags = BTMTKUART_FLAG_STANDALONE_HW, | |
1100 | .fwname = FIRMWARE_MT7663, | |
1101 | }; | |
1102 | ||
1103 | static const struct btmtkuart_data mt7668_data = { | |
1104 | .flags = BTMTKUART_FLAG_STANDALONE_HW, | |
1105 | .fwname = FIRMWARE_MT7668, | |
1106 | }; | |
1107 | ||
7237c4c9 SW |
1108 | #ifdef CONFIG_OF |
1109 | static const struct of_device_id mtk_of_match_table[] = { | |
22eaf6c9 SW |
1110 | { .compatible = "mediatek,mt7622-bluetooth", .data = &mt7622_data}, |
1111 | { .compatible = "mediatek,mt7663u-bluetooth", .data = &mt7663_data}, | |
1112 | { .compatible = "mediatek,mt7668u-bluetooth", .data = &mt7668_data}, | |
7237c4c9 SW |
1113 | { } |
1114 | }; | |
1115 | MODULE_DEVICE_TABLE(of, mtk_of_match_table); | |
1116 | #endif | |
1117 | ||
1118 | static struct serdev_device_driver btmtkuart_driver = { | |
1119 | .probe = btmtkuart_probe, | |
1120 | .remove = btmtkuart_remove, | |
1121 | .driver = { | |
1122 | .name = "btmtkuart", | |
1123 | .of_match_table = of_match_ptr(mtk_of_match_table), | |
1124 | }, | |
1125 | }; | |
1126 | ||
1127 | module_serdev_device_driver(btmtkuart_driver); | |
1128 | ||
1129 | MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); | |
1130 | MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION); | |
1131 | MODULE_VERSION(VERSION); | |
1132 | MODULE_LICENSE("GPL"); | |
1133 | MODULE_FIRMWARE(FIRMWARE_MT7622); | |
22eaf6c9 SW |
1134 | MODULE_FIRMWARE(FIRMWARE_MT7663); |
1135 | MODULE_FIRMWARE(FIRMWARE_MT7668); |