Commit | Line | Data |
---|---|---|
7dec65c8 JH |
1 | /* |
2 | * | |
3 | * Bluetooth HCI Three-wire UART driver | |
4 | * | |
5 | * Copyright (C) 2012 Intel Corporation | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
4eb3cbc4 | 24 | #include <linux/acpi.h> |
7dec65c8 | 25 | #include <linux/errno.h> |
4c791489 | 26 | #include <linux/gpio/consumer.h> |
4eb3cbc4 JC |
27 | #include <linux/kernel.h> |
28 | #include <linux/mod_devicetable.h> | |
ce945552 | 29 | #include <linux/serdev.h> |
7dec65c8 JH |
30 | #include <linux/skbuff.h> |
31 | ||
32 | #include <net/bluetooth/bluetooth.h> | |
33 | #include <net/bluetooth/hci_core.h> | |
34 | ||
b825d7c4 | 35 | #include "btrtl.h" |
7dec65c8 JH |
36 | #include "hci_uart.h" |
37 | ||
c0a1b73c JH |
38 | #define HCI_3WIRE_ACK_PKT 0 |
39 | #define HCI_3WIRE_LINK_PKT 15 | |
40 | ||
afdc944c JH |
41 | /* Sliding window size */ |
42 | #define H5_TX_WIN_MAX 4 | |
3f27e95b JH |
43 | |
44 | #define H5_ACK_TIMEOUT msecs_to_jiffies(250) | |
40f10224 | 45 | #define H5_SYNC_TIMEOUT msecs_to_jiffies(100) |
3f27e95b | 46 | |
bc1f35b9 JH |
47 | /* |
48 | * Maximum Three-wire packet: | |
49 | * 4 byte header + max value for 12-bit length + 2 bytes for CRC | |
50 | */ | |
51 | #define H5_MAX_LEN (4 + 0xfff + 2) | |
52 | ||
01977c0b JH |
53 | /* Convenience macros for reading Three-wire header values */ |
54 | #define H5_HDR_SEQ(hdr) ((hdr)[0] & 0x07) | |
55 | #define H5_HDR_ACK(hdr) (((hdr)[0] >> 3) & 0x07) | |
56 | #define H5_HDR_CRC(hdr) (((hdr)[0] >> 6) & 0x01) | |
57 | #define H5_HDR_RELIABLE(hdr) (((hdr)[0] >> 7) & 0x01) | |
58 | #define H5_HDR_PKT_TYPE(hdr) ((hdr)[1] & 0x0f) | |
4223f368 | 59 | #define H5_HDR_LEN(hdr) ((((hdr)[1] >> 4) & 0x0f) + ((hdr)[2] << 4)) |
01977c0b | 60 | |
bc1f35b9 JH |
61 | #define SLIP_DELIMITER 0xc0 |
62 | #define SLIP_ESC 0xdb | |
63 | #define SLIP_ESC_DELIM 0xdc | |
64 | #define SLIP_ESC_ESC 0xdd | |
65 | ||
e0482103 JH |
66 | /* H5 state flags */ |
67 | enum { | |
68 | H5_RX_ESC, /* SLIP escape mode */ | |
69 | H5_TX_ACK_REQ, /* Pending ack to send */ | |
70 | }; | |
71 | ||
7d664fba | 72 | struct h5 { |
ce945552 HG |
73 | /* Must be the first member, hci_serdev.c expects this. */ |
74 | struct hci_uart serdev_hu; | |
75 | ||
bc1f35b9 JH |
76 | struct sk_buff_head unack; /* Unack'ed packets queue */ |
77 | struct sk_buff_head rel; /* Reliable packets queue */ | |
78 | struct sk_buff_head unrel; /* Unreliable packets queue */ | |
79 | ||
e0482103 JH |
80 | unsigned long flags; |
81 | ||
bc1f35b9 JH |
82 | struct sk_buff *rx_skb; /* Receive buffer */ |
83 | size_t rx_pending; /* Expecting more bytes */ | |
43eb12d7 | 84 | u8 rx_ack; /* Last ack number received */ |
7d664fba | 85 | |
fa4cf04e | 86 | int (*rx_func)(struct hci_uart *hu, u8 c); |
7d664fba | 87 | |
bc1f35b9 | 88 | struct timer_list timer; /* Retransmission timer */ |
04356052 | 89 | struct hci_uart *hu; /* Parent HCI UART */ |
3f27e95b | 90 | |
43eb12d7 | 91 | u8 tx_seq; /* Next seq number to send */ |
40f10224 | 92 | u8 tx_ack; /* Next ack number to send */ |
afdc944c | 93 | u8 tx_win; /* Sliding window size */ |
10122d07 | 94 | |
f674a057 JH |
95 | enum { |
96 | H5_UNINITIALIZED, | |
97 | H5_INITIALIZED, | |
98 | H5_ACTIVE, | |
99 | } state; | |
100 | ||
95c5c220 JH |
101 | enum { |
102 | H5_AWAKE, | |
103 | H5_SLEEPING, | |
104 | H5_WAKING_UP, | |
105 | } sleep; | |
4eb3cbc4 JC |
106 | |
107 | const struct h5_vnd *vnd; | |
108 | const char *id; | |
4c791489 HG |
109 | |
110 | struct gpio_desc *enable_gpio; | |
111 | struct gpio_desc *device_wake_gpio; | |
4eb3cbc4 JC |
112 | }; |
113 | ||
114 | struct h5_vnd { | |
115 | int (*setup)(struct h5 *h5); | |
116 | void (*open)(struct h5 *h5); | |
117 | void (*close)(struct h5 *h5); | |
28a75e4c HG |
118 | int (*suspend)(struct h5 *h5); |
119 | int (*resume)(struct h5 *h5); | |
4c791489 | 120 | const struct acpi_gpio_mapping *acpi_gpio_map; |
7d664fba JH |
121 | }; |
122 | ||
bc1f35b9 JH |
123 | static void h5_reset_rx(struct h5 *h5); |
124 | ||
f674a057 JH |
125 | static void h5_link_control(struct hci_uart *hu, const void *data, size_t len) |
126 | { | |
127 | struct h5 *h5 = hu->priv; | |
128 | struct sk_buff *nskb; | |
129 | ||
130 | nskb = alloc_skb(3, GFP_ATOMIC); | |
131 | if (!nskb) | |
132 | return; | |
133 | ||
618e8bc2 | 134 | hci_skb_pkt_type(nskb) = HCI_3WIRE_LINK_PKT; |
f674a057 | 135 | |
59ae1d12 | 136 | skb_put_data(nskb, data, len); |
f674a057 JH |
137 | |
138 | skb_queue_tail(&h5->unrel, nskb); | |
139 | } | |
140 | ||
afdc944c JH |
141 | static u8 h5_cfg_field(struct h5 *h5) |
142 | { | |
afdc944c | 143 | /* Sliding window size (first 3 bits) */ |
742c5951 | 144 | return h5->tx_win & 0x07; |
afdc944c JH |
145 | } |
146 | ||
04356052 | 147 | static void h5_timed_event(struct timer_list *t) |
3f27e95b | 148 | { |
f674a057 | 149 | const unsigned char sync_req[] = { 0x01, 0x7e }; |
87a6b9bd | 150 | unsigned char conf_req[3] = { 0x03, 0xfc }; |
04356052 KC |
151 | struct h5 *h5 = from_timer(h5, t, timer); |
152 | struct hci_uart *hu = h5->hu; | |
3f27e95b JH |
153 | struct sk_buff *skb; |
154 | unsigned long flags; | |
155 | ||
95c5c220 JH |
156 | BT_DBG("%s", hu->hdev->name); |
157 | ||
f674a057 JH |
158 | if (h5->state == H5_UNINITIALIZED) |
159 | h5_link_control(hu, sync_req, sizeof(sync_req)); | |
160 | ||
afdc944c JH |
161 | if (h5->state == H5_INITIALIZED) { |
162 | conf_req[2] = h5_cfg_field(h5); | |
f674a057 | 163 | h5_link_control(hu, conf_req, sizeof(conf_req)); |
afdc944c | 164 | } |
f674a057 JH |
165 | |
166 | if (h5->state != H5_ACTIVE) { | |
167 | mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT); | |
168 | goto wakeup; | |
169 | } | |
170 | ||
95c5c220 JH |
171 | if (h5->sleep != H5_AWAKE) { |
172 | h5->sleep = H5_SLEEPING; | |
173 | goto wakeup; | |
174 | } | |
175 | ||
3f27e95b JH |
176 | BT_DBG("hu %p retransmitting %u pkts", hu, h5->unack.qlen); |
177 | ||
178 | spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); | |
179 | ||
180 | while ((skb = __skb_dequeue_tail(&h5->unack)) != NULL) { | |
43eb12d7 | 181 | h5->tx_seq = (h5->tx_seq - 1) & 0x07; |
3f27e95b JH |
182 | skb_queue_head(&h5->rel, skb); |
183 | } | |
184 | ||
185 | spin_unlock_irqrestore(&h5->unack.lock, flags); | |
186 | ||
f674a057 | 187 | wakeup: |
3f27e95b JH |
188 | hci_uart_tx_wakeup(hu); |
189 | } | |
190 | ||
b509c02d LP |
191 | static void h5_peer_reset(struct hci_uart *hu) |
192 | { | |
193 | struct h5 *h5 = hu->priv; | |
b509c02d LP |
194 | |
195 | BT_ERR("Peer device has reset"); | |
196 | ||
197 | h5->state = H5_UNINITIALIZED; | |
198 | ||
199 | del_timer(&h5->timer); | |
200 | ||
201 | skb_queue_purge(&h5->rel); | |
202 | skb_queue_purge(&h5->unrel); | |
203 | skb_queue_purge(&h5->unack); | |
204 | ||
205 | h5->tx_seq = 0; | |
206 | h5->tx_ack = 0; | |
207 | ||
882809fb MH |
208 | /* Send reset request to upper stack */ |
209 | hci_reset_dev(hu->hdev); | |
b509c02d LP |
210 | } |
211 | ||
7dec65c8 JH |
212 | static int h5_open(struct hci_uart *hu) |
213 | { | |
7d664fba | 214 | struct h5 *h5; |
40f10224 | 215 | const unsigned char sync[] = { 0x01, 0x7e }; |
7d664fba JH |
216 | |
217 | BT_DBG("hu %p", hu); | |
218 | ||
ce945552 HG |
219 | if (hu->serdev) { |
220 | h5 = serdev_device_get_drvdata(hu->serdev); | |
221 | } else { | |
222 | h5 = kzalloc(sizeof(*h5), GFP_KERNEL); | |
223 | if (!h5) | |
224 | return -ENOMEM; | |
225 | } | |
7d664fba JH |
226 | |
227 | hu->priv = h5; | |
04356052 | 228 | h5->hu = hu; |
7d664fba JH |
229 | |
230 | skb_queue_head_init(&h5->unack); | |
231 | skb_queue_head_init(&h5->rel); | |
232 | skb_queue_head_init(&h5->unrel); | |
233 | ||
bc1f35b9 JH |
234 | h5_reset_rx(h5); |
235 | ||
04356052 | 236 | timer_setup(&h5->timer, h5_timed_event, 0); |
3f27e95b | 237 | |
afdc944c JH |
238 | h5->tx_win = H5_TX_WIN_MAX; |
239 | ||
4eb3cbc4 JC |
240 | if (h5->vnd && h5->vnd->open) |
241 | h5->vnd->open(h5); | |
242 | ||
cd1b4425 JH |
243 | set_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags); |
244 | ||
40f10224 JH |
245 | /* Send initial sync request */ |
246 | h5_link_control(hu, sync, sizeof(sync)); | |
247 | mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT); | |
248 | ||
7d664fba | 249 | return 0; |
7dec65c8 JH |
250 | } |
251 | ||
252 | static int h5_close(struct hci_uart *hu) | |
253 | { | |
7d664fba JH |
254 | struct h5 *h5 = hu->priv; |
255 | ||
c327cddd MK |
256 | del_timer_sync(&h5->timer); |
257 | ||
7d664fba JH |
258 | skb_queue_purge(&h5->unack); |
259 | skb_queue_purge(&h5->rel); | |
260 | skb_queue_purge(&h5->unrel); | |
261 | ||
4eb3cbc4 JC |
262 | if (h5->vnd && h5->vnd->close) |
263 | h5->vnd->close(h5); | |
264 | ||
ce945552 HG |
265 | if (!hu->serdev) |
266 | kfree(h5); | |
7d664fba JH |
267 | |
268 | return 0; | |
7dec65c8 JH |
269 | } |
270 | ||
4eb3cbc4 JC |
271 | static int h5_setup(struct hci_uart *hu) |
272 | { | |
273 | struct h5 *h5 = hu->priv; | |
274 | ||
275 | if (h5->vnd && h5->vnd->setup) | |
276 | return h5->vnd->setup(h5); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
43eb12d7 JH |
281 | static void h5_pkt_cull(struct h5 *h5) |
282 | { | |
283 | struct sk_buff *skb, *tmp; | |
284 | unsigned long flags; | |
285 | int i, to_remove; | |
286 | u8 seq; | |
287 | ||
288 | spin_lock_irqsave(&h5->unack.lock, flags); | |
289 | ||
290 | to_remove = skb_queue_len(&h5->unack); | |
40f10224 JH |
291 | if (to_remove == 0) |
292 | goto unlock; | |
43eb12d7 JH |
293 | |
294 | seq = h5->tx_seq; | |
295 | ||
296 | while (to_remove > 0) { | |
297 | if (h5->rx_ack == seq) | |
298 | break; | |
299 | ||
300 | to_remove--; | |
4807b518 | 301 | seq = (seq - 1) & 0x07; |
43eb12d7 JH |
302 | } |
303 | ||
304 | if (seq != h5->rx_ack) | |
305 | BT_ERR("Controller acked invalid packet"); | |
306 | ||
307 | i = 0; | |
308 | skb_queue_walk_safe(&h5->unack, skb, tmp) { | |
309 | if (i++ >= to_remove) | |
310 | break; | |
311 | ||
312 | __skb_unlink(skb, &h5->unack); | |
313 | kfree_skb(skb); | |
314 | } | |
315 | ||
316 | if (skb_queue_empty(&h5->unack)) | |
317 | del_timer(&h5->timer); | |
318 | ||
40f10224 | 319 | unlock: |
43eb12d7 JH |
320 | spin_unlock_irqrestore(&h5->unack.lock, flags); |
321 | } | |
322 | ||
bc1f35b9 JH |
323 | static void h5_handle_internal_rx(struct hci_uart *hu) |
324 | { | |
40f10224 JH |
325 | struct h5 *h5 = hu->priv; |
326 | const unsigned char sync_req[] = { 0x01, 0x7e }; | |
327 | const unsigned char sync_rsp[] = { 0x02, 0x7d }; | |
87a6b9bd | 328 | unsigned char conf_req[3] = { 0x03, 0xfc }; |
afdc944c | 329 | const unsigned char conf_rsp[] = { 0x04, 0x7b }; |
10122d07 JH |
330 | const unsigned char wakeup_req[] = { 0x05, 0xfa }; |
331 | const unsigned char woken_req[] = { 0x06, 0xf9 }; | |
332 | const unsigned char sleep_req[] = { 0x07, 0x78 }; | |
40f10224 JH |
333 | const unsigned char *hdr = h5->rx_skb->data; |
334 | const unsigned char *data = &h5->rx_skb->data[4]; | |
335 | ||
bc1f35b9 | 336 | BT_DBG("%s", hu->hdev->name); |
40f10224 JH |
337 | |
338 | if (H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT) | |
339 | return; | |
340 | ||
341 | if (H5_HDR_LEN(hdr) < 2) | |
342 | return; | |
343 | ||
afdc944c JH |
344 | conf_req[2] = h5_cfg_field(h5); |
345 | ||
40f10224 | 346 | if (memcmp(data, sync_req, 2) == 0) { |
b509c02d LP |
347 | if (h5->state == H5_ACTIVE) |
348 | h5_peer_reset(hu); | |
40f10224 JH |
349 | h5_link_control(hu, sync_rsp, 2); |
350 | } else if (memcmp(data, sync_rsp, 2) == 0) { | |
b509c02d LP |
351 | if (h5->state == H5_ACTIVE) |
352 | h5_peer_reset(hu); | |
f674a057 | 353 | h5->state = H5_INITIALIZED; |
40f10224 JH |
354 | h5_link_control(hu, conf_req, 3); |
355 | } else if (memcmp(data, conf_req, 2) == 0) { | |
356 | h5_link_control(hu, conf_rsp, 2); | |
357 | h5_link_control(hu, conf_req, 3); | |
358 | } else if (memcmp(data, conf_rsp, 2) == 0) { | |
afdc944c | 359 | if (H5_HDR_LEN(hdr) > 2) |
1d3a1e69 | 360 | h5->tx_win = (data[2] & 0x07); |
afdc944c | 361 | BT_DBG("Three-wire init complete. tx_win %u", h5->tx_win); |
f674a057 | 362 | h5->state = H5_ACTIVE; |
cd1b4425 | 363 | hci_uart_init_ready(hu); |
40f10224 | 364 | return; |
10122d07 JH |
365 | } else if (memcmp(data, sleep_req, 2) == 0) { |
366 | BT_DBG("Peer went to sleep"); | |
95c5c220 JH |
367 | h5->sleep = H5_SLEEPING; |
368 | return; | |
10122d07 JH |
369 | } else if (memcmp(data, woken_req, 2) == 0) { |
370 | BT_DBG("Peer woke up"); | |
95c5c220 JH |
371 | h5->sleep = H5_AWAKE; |
372 | } else if (memcmp(data, wakeup_req, 2) == 0) { | |
373 | BT_DBG("Peer requested wakeup"); | |
374 | h5_link_control(hu, woken_req, 2); | |
375 | h5->sleep = H5_AWAKE; | |
40f10224 JH |
376 | } else { |
377 | BT_DBG("Link Control: 0x%02hhx 0x%02hhx", data[0], data[1]); | |
378 | return; | |
379 | } | |
380 | ||
381 | hci_uart_tx_wakeup(hu); | |
bc1f35b9 JH |
382 | } |
383 | ||
384 | static void h5_complete_rx_pkt(struct hci_uart *hu) | |
385 | { | |
386 | struct h5 *h5 = hu->priv; | |
43eb12d7 | 387 | const unsigned char *hdr = h5->rx_skb->data; |
bc1f35b9 | 388 | |
43eb12d7 | 389 | if (H5_HDR_RELIABLE(hdr)) { |
40f10224 | 390 | h5->tx_ack = (h5->tx_ack + 1) % 8; |
e0482103 | 391 | set_bit(H5_TX_ACK_REQ, &h5->flags); |
40f10224 | 392 | hci_uart_tx_wakeup(hu); |
43eb12d7 | 393 | } |
bc1f35b9 | 394 | |
43eb12d7 JH |
395 | h5->rx_ack = H5_HDR_ACK(hdr); |
396 | ||
397 | h5_pkt_cull(h5); | |
398 | ||
399 | switch (H5_HDR_PKT_TYPE(hdr)) { | |
bc1f35b9 JH |
400 | case HCI_EVENT_PKT: |
401 | case HCI_ACLDATA_PKT: | |
402 | case HCI_SCODATA_PKT: | |
618e8bc2 | 403 | hci_skb_pkt_type(h5->rx_skb) = H5_HDR_PKT_TYPE(hdr); |
bc1f35b9 JH |
404 | |
405 | /* Remove Three-wire header */ | |
406 | skb_pull(h5->rx_skb, 4); | |
407 | ||
e1a26170 | 408 | hci_recv_frame(hu->hdev, h5->rx_skb); |
bc1f35b9 JH |
409 | h5->rx_skb = NULL; |
410 | ||
411 | break; | |
412 | ||
413 | default: | |
414 | h5_handle_internal_rx(hu); | |
415 | break; | |
416 | } | |
417 | ||
418 | h5_reset_rx(h5); | |
419 | } | |
420 | ||
421 | static int h5_rx_crc(struct hci_uart *hu, unsigned char c) | |
422 | { | |
bc1f35b9 | 423 | h5_complete_rx_pkt(hu); |
bc1f35b9 JH |
424 | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static int h5_rx_payload(struct hci_uart *hu, unsigned char c) | |
429 | { | |
430 | struct h5 *h5 = hu->priv; | |
431 | const unsigned char *hdr = h5->rx_skb->data; | |
432 | ||
43eb12d7 | 433 | if (H5_HDR_CRC(hdr)) { |
bc1f35b9 JH |
434 | h5->rx_func = h5_rx_crc; |
435 | h5->rx_pending = 2; | |
436 | } else { | |
437 | h5_complete_rx_pkt(hu); | |
bc1f35b9 JH |
438 | } |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
443 | static int h5_rx_3wire_hdr(struct hci_uart *hu, unsigned char c) | |
444 | { | |
445 | struct h5 *h5 = hu->priv; | |
446 | const unsigned char *hdr = h5->rx_skb->data; | |
447 | ||
40f10224 JH |
448 | BT_DBG("%s rx: seq %u ack %u crc %u rel %u type %u len %u", |
449 | hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr), | |
450 | H5_HDR_CRC(hdr), H5_HDR_RELIABLE(hdr), H5_HDR_PKT_TYPE(hdr), | |
451 | H5_HDR_LEN(hdr)); | |
452 | ||
bc1f35b9 JH |
453 | if (((hdr[0] + hdr[1] + hdr[2] + hdr[3]) & 0xff) != 0xff) { |
454 | BT_ERR("Invalid header checksum"); | |
455 | h5_reset_rx(h5); | |
456 | return 0; | |
457 | } | |
458 | ||
40f10224 | 459 | if (H5_HDR_RELIABLE(hdr) && H5_HDR_SEQ(hdr) != h5->tx_ack) { |
43eb12d7 | 460 | BT_ERR("Out-of-order packet arrived (%u != %u)", |
40f10224 | 461 | H5_HDR_SEQ(hdr), h5->tx_ack); |
43eb12d7 JH |
462 | h5_reset_rx(h5); |
463 | return 0; | |
464 | } | |
465 | ||
f674a057 JH |
466 | if (h5->state != H5_ACTIVE && |
467 | H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT) { | |
468 | BT_ERR("Non-link packet received in non-active state"); | |
469 | h5_reset_rx(h5); | |
48439d50 | 470 | return 0; |
f674a057 JH |
471 | } |
472 | ||
bc1f35b9 | 473 | h5->rx_func = h5_rx_payload; |
43eb12d7 | 474 | h5->rx_pending = H5_HDR_LEN(hdr); |
bc1f35b9 JH |
475 | |
476 | return 0; | |
477 | } | |
478 | ||
479 | static int h5_rx_pkt_start(struct hci_uart *hu, unsigned char c) | |
480 | { | |
481 | struct h5 *h5 = hu->priv; | |
482 | ||
bc1f35b9 JH |
483 | if (c == SLIP_DELIMITER) |
484 | return 1; | |
485 | ||
486 | h5->rx_func = h5_rx_3wire_hdr; | |
487 | h5->rx_pending = 4; | |
488 | ||
489 | h5->rx_skb = bt_skb_alloc(H5_MAX_LEN, GFP_ATOMIC); | |
490 | if (!h5->rx_skb) { | |
491 | BT_ERR("Can't allocate mem for new packet"); | |
492 | h5_reset_rx(h5); | |
493 | return -ENOMEM; | |
494 | } | |
495 | ||
4a2fa2b8 | 496 | h5->rx_skb->dev = (void *)hu->hdev; |
bc1f35b9 JH |
497 | |
498 | return 0; | |
499 | } | |
500 | ||
501 | static int h5_rx_delimiter(struct hci_uart *hu, unsigned char c) | |
502 | { | |
503 | struct h5 *h5 = hu->priv; | |
504 | ||
bc1f35b9 JH |
505 | if (c == SLIP_DELIMITER) |
506 | h5->rx_func = h5_rx_pkt_start; | |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
511 | static void h5_unslip_one_byte(struct h5 *h5, unsigned char c) | |
512 | { | |
513 | const u8 delim = SLIP_DELIMITER, esc = SLIP_ESC; | |
514 | const u8 *byte = &c; | |
515 | ||
e0482103 JH |
516 | if (!test_bit(H5_RX_ESC, &h5->flags) && c == SLIP_ESC) { |
517 | set_bit(H5_RX_ESC, &h5->flags); | |
bc1f35b9 JH |
518 | return; |
519 | } | |
520 | ||
e0482103 | 521 | if (test_and_clear_bit(H5_RX_ESC, &h5->flags)) { |
bc1f35b9 JH |
522 | switch (c) { |
523 | case SLIP_ESC_DELIM: | |
524 | byte = &delim; | |
525 | break; | |
526 | case SLIP_ESC_ESC: | |
527 | byte = &esc; | |
528 | break; | |
529 | default: | |
530 | BT_ERR("Invalid esc byte 0x%02hhx", c); | |
531 | h5_reset_rx(h5); | |
532 | return; | |
533 | } | |
bc1f35b9 JH |
534 | } |
535 | ||
59ae1d12 | 536 | skb_put_data(h5->rx_skb, byte, 1); |
bc1f35b9 JH |
537 | h5->rx_pending--; |
538 | ||
255a68e0 | 539 | BT_DBG("unsliped 0x%02hhx, rx_pending %zu", *byte, h5->rx_pending); |
bc1f35b9 JH |
540 | } |
541 | ||
542 | static void h5_reset_rx(struct h5 *h5) | |
543 | { | |
544 | if (h5->rx_skb) { | |
545 | kfree_skb(h5->rx_skb); | |
546 | h5->rx_skb = NULL; | |
547 | } | |
548 | ||
549 | h5->rx_func = h5_rx_delimiter; | |
550 | h5->rx_pending = 0; | |
e0482103 | 551 | clear_bit(H5_RX_ESC, &h5->flags); |
bc1f35b9 JH |
552 | } |
553 | ||
9d1c40eb | 554 | static int h5_recv(struct hci_uart *hu, const void *data, int count) |
7dec65c8 | 555 | { |
bc1f35b9 | 556 | struct h5 *h5 = hu->priv; |
9d1c40eb | 557 | const unsigned char *ptr = data; |
bc1f35b9 | 558 | |
255a68e0 JH |
559 | BT_DBG("%s pending %zu count %d", hu->hdev->name, h5->rx_pending, |
560 | count); | |
bc1f35b9 JH |
561 | |
562 | while (count > 0) { | |
563 | int processed; | |
564 | ||
565 | if (h5->rx_pending > 0) { | |
566 | if (*ptr == SLIP_DELIMITER) { | |
567 | BT_ERR("Too short H5 packet"); | |
568 | h5_reset_rx(h5); | |
569 | continue; | |
570 | } | |
571 | ||
572 | h5_unslip_one_byte(h5, *ptr); | |
573 | ||
574 | ptr++; count--; | |
575 | continue; | |
576 | } | |
577 | ||
578 | processed = h5->rx_func(hu, *ptr); | |
579 | if (processed < 0) | |
580 | return processed; | |
581 | ||
582 | ptr += processed; | |
583 | count -= processed; | |
584 | } | |
585 | ||
586 | return 0; | |
7dec65c8 JH |
587 | } |
588 | ||
589 | static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
590 | { | |
7d664fba JH |
591 | struct h5 *h5 = hu->priv; |
592 | ||
593 | if (skb->len > 0xfff) { | |
594 | BT_ERR("Packet too long (%u bytes)", skb->len); | |
595 | kfree_skb(skb); | |
596 | return 0; | |
597 | } | |
598 | ||
f674a057 JH |
599 | if (h5->state != H5_ACTIVE) { |
600 | BT_ERR("Ignoring HCI data in non-active state"); | |
601 | kfree_skb(skb); | |
602 | return 0; | |
603 | } | |
604 | ||
618e8bc2 | 605 | switch (hci_skb_pkt_type(skb)) { |
7d664fba JH |
606 | case HCI_ACLDATA_PKT: |
607 | case HCI_COMMAND_PKT: | |
608 | skb_queue_tail(&h5->rel, skb); | |
609 | break; | |
610 | ||
611 | case HCI_SCODATA_PKT: | |
612 | skb_queue_tail(&h5->unrel, skb); | |
613 | break; | |
614 | ||
615 | default: | |
618e8bc2 | 616 | BT_ERR("Unknown packet type %u", hci_skb_pkt_type(skb)); |
7d664fba JH |
617 | kfree_skb(skb); |
618 | break; | |
619 | } | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
c0a1b73c JH |
624 | static void h5_slip_delim(struct sk_buff *skb) |
625 | { | |
626 | const char delim = SLIP_DELIMITER; | |
627 | ||
59ae1d12 | 628 | skb_put_data(skb, &delim, 1); |
c0a1b73c JH |
629 | } |
630 | ||
631 | static void h5_slip_one_byte(struct sk_buff *skb, u8 c) | |
632 | { | |
633 | const char esc_delim[2] = { SLIP_ESC, SLIP_ESC_DELIM }; | |
634 | const char esc_esc[2] = { SLIP_ESC, SLIP_ESC_ESC }; | |
635 | ||
636 | switch (c) { | |
637 | case SLIP_DELIMITER: | |
59ae1d12 | 638 | skb_put_data(skb, &esc_delim, 2); |
c0a1b73c JH |
639 | break; |
640 | case SLIP_ESC: | |
59ae1d12 | 641 | skb_put_data(skb, &esc_esc, 2); |
c0a1b73c JH |
642 | break; |
643 | default: | |
59ae1d12 | 644 | skb_put_data(skb, &c, 1); |
c0a1b73c JH |
645 | } |
646 | } | |
647 | ||
c826ed09 JH |
648 | static bool valid_packet_type(u8 type) |
649 | { | |
650 | switch (type) { | |
651 | case HCI_ACLDATA_PKT: | |
652 | case HCI_COMMAND_PKT: | |
653 | case HCI_SCODATA_PKT: | |
654 | case HCI_3WIRE_LINK_PKT: | |
655 | case HCI_3WIRE_ACK_PKT: | |
656 | return true; | |
657 | default: | |
658 | return false; | |
659 | } | |
660 | } | |
661 | ||
662 | static struct sk_buff *h5_prepare_pkt(struct hci_uart *hu, u8 pkt_type, | |
663 | const u8 *data, size_t len) | |
7d664fba | 664 | { |
40f10224 | 665 | struct h5 *h5 = hu->priv; |
c0a1b73c JH |
666 | struct sk_buff *nskb; |
667 | u8 hdr[4]; | |
668 | int i; | |
669 | ||
c826ed09 JH |
670 | if (!valid_packet_type(pkt_type)) { |
671 | BT_ERR("Unknown packet type %u", pkt_type); | |
672 | return NULL; | |
673 | } | |
674 | ||
c0a1b73c JH |
675 | /* |
676 | * Max len of packet: (original len + 4 (H5 hdr) + 2 (crc)) * 2 | |
677 | * (because bytes 0xc0 and 0xdb are escaped, worst case is when | |
678 | * the packet is all made of 0xc0 and 0xdb) + 2 (0xc0 | |
679 | * delimiters at start and end). | |
680 | */ | |
681 | nskb = alloc_skb((len + 6) * 2 + 2, GFP_ATOMIC); | |
682 | if (!nskb) | |
683 | return NULL; | |
684 | ||
618e8bc2 | 685 | hci_skb_pkt_type(nskb) = pkt_type; |
c0a1b73c JH |
686 | |
687 | h5_slip_delim(nskb); | |
688 | ||
40f10224 | 689 | hdr[0] = h5->tx_ack << 3; |
e0482103 | 690 | clear_bit(H5_TX_ACK_REQ, &h5->flags); |
c0a1b73c | 691 | |
c826ed09 JH |
692 | /* Reliable packet? */ |
693 | if (pkt_type == HCI_ACLDATA_PKT || pkt_type == HCI_COMMAND_PKT) { | |
c0a1b73c | 694 | hdr[0] |= 1 << 7; |
43eb12d7 JH |
695 | hdr[0] |= h5->tx_seq; |
696 | h5->tx_seq = (h5->tx_seq + 1) % 8; | |
c0a1b73c JH |
697 | } |
698 | ||
699 | hdr[1] = pkt_type | ((len & 0x0f) << 4); | |
700 | hdr[2] = len >> 4; | |
701 | hdr[3] = ~((hdr[0] + hdr[1] + hdr[2]) & 0xff); | |
702 | ||
40f10224 JH |
703 | BT_DBG("%s tx: seq %u ack %u crc %u rel %u type %u len %u", |
704 | hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr), | |
705 | H5_HDR_CRC(hdr), H5_HDR_RELIABLE(hdr), H5_HDR_PKT_TYPE(hdr), | |
706 | H5_HDR_LEN(hdr)); | |
707 | ||
c0a1b73c JH |
708 | for (i = 0; i < 4; i++) |
709 | h5_slip_one_byte(nskb, hdr[i]); | |
710 | ||
711 | for (i = 0; i < len; i++) | |
712 | h5_slip_one_byte(nskb, data[i]); | |
713 | ||
714 | h5_slip_delim(nskb); | |
715 | ||
716 | return nskb; | |
717 | } | |
718 | ||
7dec65c8 JH |
719 | static struct sk_buff *h5_dequeue(struct hci_uart *hu) |
720 | { | |
7d664fba | 721 | struct h5 *h5 = hu->priv; |
3f27e95b | 722 | unsigned long flags; |
7d664fba JH |
723 | struct sk_buff *skb, *nskb; |
724 | ||
95c5c220 JH |
725 | if (h5->sleep != H5_AWAKE) { |
726 | const unsigned char wakeup_req[] = { 0x05, 0xfa }; | |
727 | ||
728 | if (h5->sleep == H5_WAKING_UP) | |
729 | return NULL; | |
730 | ||
731 | h5->sleep = H5_WAKING_UP; | |
732 | BT_DBG("Sending wakeup request"); | |
733 | ||
734 | mod_timer(&h5->timer, jiffies + HZ / 100); | |
735 | return h5_prepare_pkt(hu, HCI_3WIRE_LINK_PKT, wakeup_req, 2); | |
736 | } | |
737 | ||
a08b15e6 | 738 | skb = skb_dequeue(&h5->unrel); |
4a2fa2b8 | 739 | if (skb) { |
618e8bc2 | 740 | nskb = h5_prepare_pkt(hu, hci_skb_pkt_type(skb), |
c0a1b73c | 741 | skb->data, skb->len); |
7d664fba JH |
742 | if (nskb) { |
743 | kfree_skb(skb); | |
744 | return nskb; | |
745 | } | |
746 | ||
747 | skb_queue_head(&h5->unrel, skb); | |
748 | BT_ERR("Could not dequeue pkt because alloc_skb failed"); | |
749 | } | |
750 | ||
3f27e95b JH |
751 | spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); |
752 | ||
afdc944c | 753 | if (h5->unack.qlen >= h5->tx_win) |
3f27e95b JH |
754 | goto unlock; |
755 | ||
a08b15e6 | 756 | skb = skb_dequeue(&h5->rel); |
4a2fa2b8 | 757 | if (skb) { |
618e8bc2 | 758 | nskb = h5_prepare_pkt(hu, hci_skb_pkt_type(skb), |
c0a1b73c | 759 | skb->data, skb->len); |
3f27e95b JH |
760 | if (nskb) { |
761 | __skb_queue_tail(&h5->unack, skb); | |
762 | mod_timer(&h5->timer, jiffies + H5_ACK_TIMEOUT); | |
763 | spin_unlock_irqrestore(&h5->unack.lock, flags); | |
764 | return nskb; | |
765 | } | |
766 | ||
767 | skb_queue_head(&h5->rel, skb); | |
768 | BT_ERR("Could not dequeue pkt because alloc_skb failed"); | |
769 | } | |
770 | ||
771 | unlock: | |
772 | spin_unlock_irqrestore(&h5->unack.lock, flags); | |
773 | ||
e0482103 | 774 | if (test_bit(H5_TX_ACK_REQ, &h5->flags)) |
40f10224 | 775 | return h5_prepare_pkt(hu, HCI_3WIRE_ACK_PKT, NULL, 0); |
7d664fba | 776 | |
7dec65c8 JH |
777 | return NULL; |
778 | } | |
779 | ||
780 | static int h5_flush(struct hci_uart *hu) | |
781 | { | |
7d664fba JH |
782 | BT_DBG("hu %p", hu); |
783 | return 0; | |
7dec65c8 JH |
784 | } |
785 | ||
4ee7ef19 | 786 | static const struct hci_uart_proto h5p = { |
7dec65c8 | 787 | .id = HCI_UART_3WIRE, |
7c40fb8d | 788 | .name = "Three-wire (H5)", |
7dec65c8 JH |
789 | .open = h5_open, |
790 | .close = h5_close, | |
4eb3cbc4 | 791 | .setup = h5_setup, |
7dec65c8 JH |
792 | .recv = h5_recv, |
793 | .enqueue = h5_enqueue, | |
794 | .dequeue = h5_dequeue, | |
795 | .flush = h5_flush, | |
796 | }; | |
797 | ||
ce945552 HG |
798 | static int h5_serdev_probe(struct serdev_device *serdev) |
799 | { | |
4eb3cbc4 | 800 | const struct acpi_device_id *match; |
ce945552 HG |
801 | struct device *dev = &serdev->dev; |
802 | struct h5 *h5; | |
803 | ||
804 | h5 = devm_kzalloc(dev, sizeof(*h5), GFP_KERNEL); | |
805 | if (!h5) | |
806 | return -ENOMEM; | |
807 | ||
808 | set_bit(HCI_UART_RESET_ON_INIT, &h5->serdev_hu.flags); | |
809 | ||
810 | h5->hu = &h5->serdev_hu; | |
811 | h5->serdev_hu.serdev = serdev; | |
812 | serdev_device_set_drvdata(serdev, h5); | |
813 | ||
4eb3cbc4 JC |
814 | if (has_acpi_companion(dev)) { |
815 | match = acpi_match_device(dev->driver->acpi_match_table, dev); | |
816 | if (!match) | |
817 | return -ENODEV; | |
818 | ||
819 | h5->vnd = (const struct h5_vnd *)match->driver_data; | |
820 | h5->id = (char *)match->id; | |
4c791489 HG |
821 | |
822 | if (h5->vnd->acpi_gpio_map) | |
823 | devm_acpi_dev_add_driver_gpios(dev, | |
824 | h5->vnd->acpi_gpio_map); | |
4eb3cbc4 JC |
825 | } |
826 | ||
4c791489 HG |
827 | h5->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); |
828 | if (IS_ERR(h5->enable_gpio)) | |
829 | return PTR_ERR(h5->enable_gpio); | |
830 | ||
831 | h5->device_wake_gpio = devm_gpiod_get_optional(dev, "device-wake", | |
832 | GPIOD_OUT_LOW); | |
833 | if (IS_ERR(h5->device_wake_gpio)) | |
834 | return PTR_ERR(h5->device_wake_gpio); | |
835 | ||
ce945552 HG |
836 | return hci_uart_register_device(&h5->serdev_hu, &h5p); |
837 | } | |
838 | ||
839 | static void h5_serdev_remove(struct serdev_device *serdev) | |
840 | { | |
841 | struct h5 *h5 = serdev_device_get_drvdata(serdev); | |
842 | ||
843 | hci_uart_unregister_device(&h5->serdev_hu); | |
844 | } | |
845 | ||
28a75e4c HG |
846 | static int __maybe_unused h5_serdev_suspend(struct device *dev) |
847 | { | |
848 | struct h5 *h5 = dev_get_drvdata(dev); | |
849 | int ret = 0; | |
850 | ||
851 | if (h5->vnd && h5->vnd->suspend) | |
852 | ret = h5->vnd->suspend(h5); | |
853 | ||
854 | return ret; | |
855 | } | |
856 | ||
857 | static int __maybe_unused h5_serdev_resume(struct device *dev) | |
858 | { | |
859 | struct h5 *h5 = dev_get_drvdata(dev); | |
860 | int ret = 0; | |
861 | ||
862 | if (h5->vnd && h5->vnd->resume) | |
863 | ret = h5->vnd->resume(h5); | |
864 | ||
865 | return ret; | |
866 | } | |
867 | ||
b9763cdf | 868 | #ifdef CONFIG_BT_HCIUART_RTL |
b825d7c4 JC |
869 | static int h5_btrtl_setup(struct h5 *h5) |
870 | { | |
871 | struct btrtl_device_info *btrtl_dev; | |
872 | struct sk_buff *skb; | |
873 | __le32 baudrate_data; | |
874 | u32 device_baudrate; | |
875 | unsigned int controller_baudrate; | |
876 | bool flow_control; | |
877 | int err; | |
878 | ||
879 | btrtl_dev = btrtl_initialize(h5->hu->hdev, h5->id); | |
880 | if (IS_ERR(btrtl_dev)) | |
881 | return PTR_ERR(btrtl_dev); | |
882 | ||
883 | err = btrtl_get_uart_settings(h5->hu->hdev, btrtl_dev, | |
884 | &controller_baudrate, &device_baudrate, | |
885 | &flow_control); | |
886 | if (err) | |
887 | goto out_free; | |
888 | ||
889 | baudrate_data = cpu_to_le32(device_baudrate); | |
890 | skb = __hci_cmd_sync(h5->hu->hdev, 0xfc17, sizeof(baudrate_data), | |
891 | &baudrate_data, HCI_INIT_TIMEOUT); | |
892 | if (IS_ERR(skb)) { | |
893 | rtl_dev_err(h5->hu->hdev, "set baud rate command failed\n"); | |
894 | err = PTR_ERR(skb); | |
895 | goto out_free; | |
896 | } else { | |
897 | kfree_skb(skb); | |
898 | } | |
899 | /* Give the device some time to set up the new baudrate. */ | |
900 | usleep_range(10000, 20000); | |
901 | ||
902 | serdev_device_set_baudrate(h5->hu->serdev, controller_baudrate); | |
903 | serdev_device_set_flow_control(h5->hu->serdev, flow_control); | |
904 | ||
905 | err = btrtl_download_firmware(h5->hu->hdev, btrtl_dev); | |
906 | /* Give the device some time before the hci-core sends it a reset */ | |
907 | usleep_range(10000, 20000); | |
908 | ||
909 | out_free: | |
910 | btrtl_free(btrtl_dev); | |
911 | ||
912 | return err; | |
913 | } | |
914 | ||
915 | static void h5_btrtl_open(struct h5 *h5) | |
916 | { | |
917 | /* Devices always start with these fixed parameters */ | |
918 | serdev_device_set_flow_control(h5->hu->serdev, false); | |
919 | serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN); | |
920 | serdev_device_set_baudrate(h5->hu->serdev, 115200); | |
4c791489 HG |
921 | |
922 | /* The controller needs up to 500ms to wakeup */ | |
923 | gpiod_set_value_cansleep(h5->enable_gpio, 1); | |
924 | gpiod_set_value_cansleep(h5->device_wake_gpio, 1); | |
925 | msleep(500); | |
b825d7c4 JC |
926 | } |
927 | ||
4c791489 HG |
928 | static void h5_btrtl_close(struct h5 *h5) |
929 | { | |
930 | gpiod_set_value_cansleep(h5->device_wake_gpio, 0); | |
931 | gpiod_set_value_cansleep(h5->enable_gpio, 0); | |
932 | } | |
933 | ||
8589086f HG |
934 | /* Suspend/resume support. On many devices the RTL BT device loses power during |
935 | * suspend/resume, causing it to lose its firmware and all state. So we simply | |
936 | * turn it off on suspend and reprobe on resume. This mirrors how RTL devices | |
937 | * are handled in the USB driver, where the USB_QUIRK_RESET_RESUME is used which | |
938 | * also causes a reprobe on resume. | |
939 | */ | |
940 | static int h5_btrtl_suspend(struct h5 *h5) | |
941 | { | |
942 | serdev_device_set_flow_control(h5->hu->serdev, false); | |
943 | gpiod_set_value_cansleep(h5->device_wake_gpio, 0); | |
944 | gpiod_set_value_cansleep(h5->enable_gpio, 0); | |
945 | return 0; | |
946 | } | |
947 | ||
948 | struct h5_btrtl_reprobe { | |
949 | struct device *dev; | |
950 | struct work_struct work; | |
951 | }; | |
952 | ||
953 | static void h5_btrtl_reprobe_worker(struct work_struct *work) | |
954 | { | |
955 | struct h5_btrtl_reprobe *reprobe = | |
956 | container_of(work, struct h5_btrtl_reprobe, work); | |
957 | int ret; | |
958 | ||
959 | ret = device_reprobe(reprobe->dev); | |
960 | if (ret && ret != -EPROBE_DEFER) | |
961 | dev_err(reprobe->dev, "Reprobe error %d\n", ret); | |
962 | ||
963 | put_device(reprobe->dev); | |
964 | kfree(reprobe); | |
965 | module_put(THIS_MODULE); | |
966 | } | |
967 | ||
968 | static int h5_btrtl_resume(struct h5 *h5) | |
969 | { | |
970 | struct h5_btrtl_reprobe *reprobe; | |
971 | ||
972 | reprobe = kzalloc(sizeof(*reprobe), GFP_KERNEL); | |
973 | if (!reprobe) | |
974 | return -ENOMEM; | |
975 | ||
976 | __module_get(THIS_MODULE); | |
977 | ||
978 | INIT_WORK(&reprobe->work, h5_btrtl_reprobe_worker); | |
979 | reprobe->dev = get_device(&h5->hu->serdev->dev); | |
980 | queue_work(system_long_wq, &reprobe->work); | |
981 | return 0; | |
982 | } | |
983 | ||
4c791489 HG |
984 | static const struct acpi_gpio_params btrtl_device_wake_gpios = { 0, 0, false }; |
985 | static const struct acpi_gpio_params btrtl_enable_gpios = { 1, 0, false }; | |
986 | static const struct acpi_gpio_params btrtl_host_wake_gpios = { 2, 0, false }; | |
987 | static const struct acpi_gpio_mapping acpi_btrtl_gpios[] = { | |
988 | { "device-wake-gpios", &btrtl_device_wake_gpios, 1 }, | |
989 | { "enable-gpios", &btrtl_enable_gpios, 1 }, | |
990 | { "host-wake-gpios", &btrtl_host_wake_gpios, 1 }, | |
991 | {}, | |
992 | }; | |
993 | ||
b825d7c4 JC |
994 | static struct h5_vnd rtl_vnd = { |
995 | .setup = h5_btrtl_setup, | |
996 | .open = h5_btrtl_open, | |
4c791489 | 997 | .close = h5_btrtl_close, |
8589086f HG |
998 | .suspend = h5_btrtl_suspend, |
999 | .resume = h5_btrtl_resume, | |
4c791489 | 1000 | .acpi_gpio_map = acpi_btrtl_gpios, |
b825d7c4 | 1001 | }; |
b9763cdf | 1002 | #endif |
b825d7c4 JC |
1003 | |
1004 | #ifdef CONFIG_ACPI | |
1005 | static const struct acpi_device_id h5_acpi_match[] = { | |
b9763cdf | 1006 | #ifdef CONFIG_BT_HCIUART_RTL |
b825d7c4 | 1007 | { "OBDA8723", (kernel_ulong_t)&rtl_vnd }, |
b9763cdf | 1008 | #endif |
b825d7c4 JC |
1009 | { }, |
1010 | }; | |
1011 | MODULE_DEVICE_TABLE(acpi, h5_acpi_match); | |
1012 | #endif | |
1013 | ||
28a75e4c HG |
1014 | static const struct dev_pm_ops h5_serdev_pm_ops = { |
1015 | SET_SYSTEM_SLEEP_PM_OPS(h5_serdev_suspend, h5_serdev_resume) | |
1016 | }; | |
1017 | ||
ce945552 HG |
1018 | static struct serdev_device_driver h5_serdev_driver = { |
1019 | .probe = h5_serdev_probe, | |
1020 | .remove = h5_serdev_remove, | |
1021 | .driver = { | |
1022 | .name = "hci_uart_h5", | |
b825d7c4 | 1023 | .acpi_match_table = ACPI_PTR(h5_acpi_match), |
28a75e4c | 1024 | .pm = &h5_serdev_pm_ops, |
ce945552 HG |
1025 | }, |
1026 | }; | |
1027 | ||
7dec65c8 JH |
1028 | int __init h5_init(void) |
1029 | { | |
ce945552 | 1030 | serdev_device_driver_register(&h5_serdev_driver); |
01009eec | 1031 | return hci_uart_register_proto(&h5p); |
7dec65c8 JH |
1032 | } |
1033 | ||
1034 | int __exit h5_deinit(void) | |
1035 | { | |
ce945552 | 1036 | serdev_device_driver_unregister(&h5_serdev_driver); |
7dec65c8 JH |
1037 | return hci_uart_unregister_proto(&h5p); |
1038 | } |