Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
7dec65c8 JH |
2 | /* |
3 | * | |
4 | * Bluetooth HCI Three-wire UART driver | |
5 | * | |
6 | * Copyright (C) 2012 Intel Corporation | |
7dec65c8 JH |
7 | */ |
8 | ||
4eb3cbc4 | 9 | #include <linux/acpi.h> |
7dec65c8 | 10 | #include <linux/errno.h> |
4c791489 | 11 | #include <linux/gpio/consumer.h> |
4eb3cbc4 JC |
12 | #include <linux/kernel.h> |
13 | #include <linux/mod_devicetable.h> | |
ce945552 | 14 | #include <linux/serdev.h> |
7dec65c8 JH |
15 | #include <linux/skbuff.h> |
16 | ||
17 | #include <net/bluetooth/bluetooth.h> | |
18 | #include <net/bluetooth/hci_core.h> | |
19 | ||
b825d7c4 | 20 | #include "btrtl.h" |
7dec65c8 JH |
21 | #include "hci_uart.h" |
22 | ||
c0a1b73c JH |
23 | #define HCI_3WIRE_ACK_PKT 0 |
24 | #define HCI_3WIRE_LINK_PKT 15 | |
25 | ||
afdc944c JH |
26 | /* Sliding window size */ |
27 | #define H5_TX_WIN_MAX 4 | |
3f27e95b JH |
28 | |
29 | #define H5_ACK_TIMEOUT msecs_to_jiffies(250) | |
40f10224 | 30 | #define H5_SYNC_TIMEOUT msecs_to_jiffies(100) |
3f27e95b | 31 | |
bc1f35b9 JH |
32 | /* |
33 | * Maximum Three-wire packet: | |
34 | * 4 byte header + max value for 12-bit length + 2 bytes for CRC | |
35 | */ | |
36 | #define H5_MAX_LEN (4 + 0xfff + 2) | |
37 | ||
01977c0b JH |
38 | /* Convenience macros for reading Three-wire header values */ |
39 | #define H5_HDR_SEQ(hdr) ((hdr)[0] & 0x07) | |
40 | #define H5_HDR_ACK(hdr) (((hdr)[0] >> 3) & 0x07) | |
41 | #define H5_HDR_CRC(hdr) (((hdr)[0] >> 6) & 0x01) | |
42 | #define H5_HDR_RELIABLE(hdr) (((hdr)[0] >> 7) & 0x01) | |
43 | #define H5_HDR_PKT_TYPE(hdr) ((hdr)[1] & 0x0f) | |
4223f368 | 44 | #define H5_HDR_LEN(hdr) ((((hdr)[1] >> 4) & 0x0f) + ((hdr)[2] << 4)) |
01977c0b | 45 | |
bc1f35b9 JH |
46 | #define SLIP_DELIMITER 0xc0 |
47 | #define SLIP_ESC 0xdb | |
48 | #define SLIP_ESC_DELIM 0xdc | |
49 | #define SLIP_ESC_ESC 0xdd | |
50 | ||
e0482103 JH |
51 | /* H5 state flags */ |
52 | enum { | |
53 | H5_RX_ESC, /* SLIP escape mode */ | |
54 | H5_TX_ACK_REQ, /* Pending ack to send */ | |
55 | }; | |
56 | ||
7d664fba | 57 | struct h5 { |
ce945552 HG |
58 | /* Must be the first member, hci_serdev.c expects this. */ |
59 | struct hci_uart serdev_hu; | |
60 | ||
bc1f35b9 JH |
61 | struct sk_buff_head unack; /* Unack'ed packets queue */ |
62 | struct sk_buff_head rel; /* Reliable packets queue */ | |
63 | struct sk_buff_head unrel; /* Unreliable packets queue */ | |
64 | ||
e0482103 JH |
65 | unsigned long flags; |
66 | ||
bc1f35b9 JH |
67 | struct sk_buff *rx_skb; /* Receive buffer */ |
68 | size_t rx_pending; /* Expecting more bytes */ | |
43eb12d7 | 69 | u8 rx_ack; /* Last ack number received */ |
7d664fba | 70 | |
fa4cf04e | 71 | int (*rx_func)(struct hci_uart *hu, u8 c); |
7d664fba | 72 | |
bc1f35b9 | 73 | struct timer_list timer; /* Retransmission timer */ |
04356052 | 74 | struct hci_uart *hu; /* Parent HCI UART */ |
3f27e95b | 75 | |
43eb12d7 | 76 | u8 tx_seq; /* Next seq number to send */ |
40f10224 | 77 | u8 tx_ack; /* Next ack number to send */ |
afdc944c | 78 | u8 tx_win; /* Sliding window size */ |
10122d07 | 79 | |
f674a057 JH |
80 | enum { |
81 | H5_UNINITIALIZED, | |
82 | H5_INITIALIZED, | |
83 | H5_ACTIVE, | |
84 | } state; | |
85 | ||
95c5c220 JH |
86 | enum { |
87 | H5_AWAKE, | |
88 | H5_SLEEPING, | |
89 | H5_WAKING_UP, | |
90 | } sleep; | |
4eb3cbc4 JC |
91 | |
92 | const struct h5_vnd *vnd; | |
93 | const char *id; | |
4c791489 HG |
94 | |
95 | struct gpio_desc *enable_gpio; | |
96 | struct gpio_desc *device_wake_gpio; | |
4eb3cbc4 JC |
97 | }; |
98 | ||
99 | struct h5_vnd { | |
100 | int (*setup)(struct h5 *h5); | |
101 | void (*open)(struct h5 *h5); | |
102 | void (*close)(struct h5 *h5); | |
28a75e4c HG |
103 | int (*suspend)(struct h5 *h5); |
104 | int (*resume)(struct h5 *h5); | |
4c791489 | 105 | const struct acpi_gpio_mapping *acpi_gpio_map; |
7d664fba JH |
106 | }; |
107 | ||
bc1f35b9 JH |
108 | static void h5_reset_rx(struct h5 *h5); |
109 | ||
f674a057 JH |
110 | static void h5_link_control(struct hci_uart *hu, const void *data, size_t len) |
111 | { | |
112 | struct h5 *h5 = hu->priv; | |
113 | struct sk_buff *nskb; | |
114 | ||
115 | nskb = alloc_skb(3, GFP_ATOMIC); | |
116 | if (!nskb) | |
117 | return; | |
118 | ||
618e8bc2 | 119 | hci_skb_pkt_type(nskb) = HCI_3WIRE_LINK_PKT; |
f674a057 | 120 | |
59ae1d12 | 121 | skb_put_data(nskb, data, len); |
f674a057 JH |
122 | |
123 | skb_queue_tail(&h5->unrel, nskb); | |
124 | } | |
125 | ||
afdc944c JH |
126 | static u8 h5_cfg_field(struct h5 *h5) |
127 | { | |
afdc944c | 128 | /* Sliding window size (first 3 bits) */ |
742c5951 | 129 | return h5->tx_win & 0x07; |
afdc944c JH |
130 | } |
131 | ||
04356052 | 132 | static void h5_timed_event(struct timer_list *t) |
3f27e95b | 133 | { |
f674a057 | 134 | const unsigned char sync_req[] = { 0x01, 0x7e }; |
87a6b9bd | 135 | unsigned char conf_req[3] = { 0x03, 0xfc }; |
04356052 KC |
136 | struct h5 *h5 = from_timer(h5, t, timer); |
137 | struct hci_uart *hu = h5->hu; | |
3f27e95b JH |
138 | struct sk_buff *skb; |
139 | unsigned long flags; | |
140 | ||
95c5c220 JH |
141 | BT_DBG("%s", hu->hdev->name); |
142 | ||
f674a057 JH |
143 | if (h5->state == H5_UNINITIALIZED) |
144 | h5_link_control(hu, sync_req, sizeof(sync_req)); | |
145 | ||
afdc944c JH |
146 | if (h5->state == H5_INITIALIZED) { |
147 | conf_req[2] = h5_cfg_field(h5); | |
f674a057 | 148 | h5_link_control(hu, conf_req, sizeof(conf_req)); |
afdc944c | 149 | } |
f674a057 JH |
150 | |
151 | if (h5->state != H5_ACTIVE) { | |
152 | mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT); | |
153 | goto wakeup; | |
154 | } | |
155 | ||
95c5c220 JH |
156 | if (h5->sleep != H5_AWAKE) { |
157 | h5->sleep = H5_SLEEPING; | |
158 | goto wakeup; | |
159 | } | |
160 | ||
3f27e95b JH |
161 | BT_DBG("hu %p retransmitting %u pkts", hu, h5->unack.qlen); |
162 | ||
163 | spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); | |
164 | ||
165 | while ((skb = __skb_dequeue_tail(&h5->unack)) != NULL) { | |
43eb12d7 | 166 | h5->tx_seq = (h5->tx_seq - 1) & 0x07; |
3f27e95b JH |
167 | skb_queue_head(&h5->rel, skb); |
168 | } | |
169 | ||
170 | spin_unlock_irqrestore(&h5->unack.lock, flags); | |
171 | ||
f674a057 | 172 | wakeup: |
3f27e95b JH |
173 | hci_uart_tx_wakeup(hu); |
174 | } | |
175 | ||
b509c02d LP |
176 | static void h5_peer_reset(struct hci_uart *hu) |
177 | { | |
178 | struct h5 *h5 = hu->priv; | |
b509c02d LP |
179 | |
180 | BT_ERR("Peer device has reset"); | |
181 | ||
182 | h5->state = H5_UNINITIALIZED; | |
183 | ||
184 | del_timer(&h5->timer); | |
185 | ||
186 | skb_queue_purge(&h5->rel); | |
187 | skb_queue_purge(&h5->unrel); | |
188 | skb_queue_purge(&h5->unack); | |
189 | ||
190 | h5->tx_seq = 0; | |
191 | h5->tx_ack = 0; | |
192 | ||
882809fb MH |
193 | /* Send reset request to upper stack */ |
194 | hci_reset_dev(hu->hdev); | |
b509c02d LP |
195 | } |
196 | ||
7dec65c8 JH |
197 | static int h5_open(struct hci_uart *hu) |
198 | { | |
7d664fba | 199 | struct h5 *h5; |
40f10224 | 200 | const unsigned char sync[] = { 0x01, 0x7e }; |
7d664fba JH |
201 | |
202 | BT_DBG("hu %p", hu); | |
203 | ||
ce945552 HG |
204 | if (hu->serdev) { |
205 | h5 = serdev_device_get_drvdata(hu->serdev); | |
206 | } else { | |
207 | h5 = kzalloc(sizeof(*h5), GFP_KERNEL); | |
208 | if (!h5) | |
209 | return -ENOMEM; | |
210 | } | |
7d664fba JH |
211 | |
212 | hu->priv = h5; | |
04356052 | 213 | h5->hu = hu; |
7d664fba JH |
214 | |
215 | skb_queue_head_init(&h5->unack); | |
216 | skb_queue_head_init(&h5->rel); | |
217 | skb_queue_head_init(&h5->unrel); | |
218 | ||
bc1f35b9 JH |
219 | h5_reset_rx(h5); |
220 | ||
04356052 | 221 | timer_setup(&h5->timer, h5_timed_event, 0); |
3f27e95b | 222 | |
afdc944c JH |
223 | h5->tx_win = H5_TX_WIN_MAX; |
224 | ||
4eb3cbc4 JC |
225 | if (h5->vnd && h5->vnd->open) |
226 | h5->vnd->open(h5); | |
227 | ||
cd1b4425 JH |
228 | set_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags); |
229 | ||
40f10224 JH |
230 | /* Send initial sync request */ |
231 | h5_link_control(hu, sync, sizeof(sync)); | |
232 | mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT); | |
233 | ||
7d664fba | 234 | return 0; |
7dec65c8 JH |
235 | } |
236 | ||
237 | static int h5_close(struct hci_uart *hu) | |
238 | { | |
7d664fba JH |
239 | struct h5 *h5 = hu->priv; |
240 | ||
c327cddd MK |
241 | del_timer_sync(&h5->timer); |
242 | ||
7d664fba JH |
243 | skb_queue_purge(&h5->unack); |
244 | skb_queue_purge(&h5->rel); | |
245 | skb_queue_purge(&h5->unrel); | |
246 | ||
4eb3cbc4 JC |
247 | if (h5->vnd && h5->vnd->close) |
248 | h5->vnd->close(h5); | |
249 | ||
ce945552 HG |
250 | if (!hu->serdev) |
251 | kfree(h5); | |
7d664fba JH |
252 | |
253 | return 0; | |
7dec65c8 JH |
254 | } |
255 | ||
4eb3cbc4 JC |
256 | static int h5_setup(struct hci_uart *hu) |
257 | { | |
258 | struct h5 *h5 = hu->priv; | |
259 | ||
260 | if (h5->vnd && h5->vnd->setup) | |
261 | return h5->vnd->setup(h5); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
43eb12d7 JH |
266 | static void h5_pkt_cull(struct h5 *h5) |
267 | { | |
268 | struct sk_buff *skb, *tmp; | |
269 | unsigned long flags; | |
270 | int i, to_remove; | |
271 | u8 seq; | |
272 | ||
273 | spin_lock_irqsave(&h5->unack.lock, flags); | |
274 | ||
275 | to_remove = skb_queue_len(&h5->unack); | |
40f10224 JH |
276 | if (to_remove == 0) |
277 | goto unlock; | |
43eb12d7 JH |
278 | |
279 | seq = h5->tx_seq; | |
280 | ||
281 | while (to_remove > 0) { | |
282 | if (h5->rx_ack == seq) | |
283 | break; | |
284 | ||
285 | to_remove--; | |
4807b518 | 286 | seq = (seq - 1) & 0x07; |
43eb12d7 JH |
287 | } |
288 | ||
289 | if (seq != h5->rx_ack) | |
290 | BT_ERR("Controller acked invalid packet"); | |
291 | ||
292 | i = 0; | |
293 | skb_queue_walk_safe(&h5->unack, skb, tmp) { | |
294 | if (i++ >= to_remove) | |
295 | break; | |
296 | ||
297 | __skb_unlink(skb, &h5->unack); | |
298 | kfree_skb(skb); | |
299 | } | |
300 | ||
301 | if (skb_queue_empty(&h5->unack)) | |
302 | del_timer(&h5->timer); | |
303 | ||
40f10224 | 304 | unlock: |
43eb12d7 JH |
305 | spin_unlock_irqrestore(&h5->unack.lock, flags); |
306 | } | |
307 | ||
bc1f35b9 JH |
308 | static void h5_handle_internal_rx(struct hci_uart *hu) |
309 | { | |
40f10224 JH |
310 | struct h5 *h5 = hu->priv; |
311 | const unsigned char sync_req[] = { 0x01, 0x7e }; | |
312 | const unsigned char sync_rsp[] = { 0x02, 0x7d }; | |
87a6b9bd | 313 | unsigned char conf_req[3] = { 0x03, 0xfc }; |
afdc944c | 314 | const unsigned char conf_rsp[] = { 0x04, 0x7b }; |
10122d07 JH |
315 | const unsigned char wakeup_req[] = { 0x05, 0xfa }; |
316 | const unsigned char woken_req[] = { 0x06, 0xf9 }; | |
317 | const unsigned char sleep_req[] = { 0x07, 0x78 }; | |
40f10224 JH |
318 | const unsigned char *hdr = h5->rx_skb->data; |
319 | const unsigned char *data = &h5->rx_skb->data[4]; | |
320 | ||
bc1f35b9 | 321 | BT_DBG("%s", hu->hdev->name); |
40f10224 JH |
322 | |
323 | if (H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT) | |
324 | return; | |
325 | ||
326 | if (H5_HDR_LEN(hdr) < 2) | |
327 | return; | |
328 | ||
afdc944c JH |
329 | conf_req[2] = h5_cfg_field(h5); |
330 | ||
40f10224 | 331 | if (memcmp(data, sync_req, 2) == 0) { |
b509c02d LP |
332 | if (h5->state == H5_ACTIVE) |
333 | h5_peer_reset(hu); | |
40f10224 JH |
334 | h5_link_control(hu, sync_rsp, 2); |
335 | } else if (memcmp(data, sync_rsp, 2) == 0) { | |
b509c02d LP |
336 | if (h5->state == H5_ACTIVE) |
337 | h5_peer_reset(hu); | |
f674a057 | 338 | h5->state = H5_INITIALIZED; |
40f10224 JH |
339 | h5_link_control(hu, conf_req, 3); |
340 | } else if (memcmp(data, conf_req, 2) == 0) { | |
341 | h5_link_control(hu, conf_rsp, 2); | |
342 | h5_link_control(hu, conf_req, 3); | |
343 | } else if (memcmp(data, conf_rsp, 2) == 0) { | |
afdc944c | 344 | if (H5_HDR_LEN(hdr) > 2) |
1d3a1e69 | 345 | h5->tx_win = (data[2] & 0x07); |
afdc944c | 346 | BT_DBG("Three-wire init complete. tx_win %u", h5->tx_win); |
f674a057 | 347 | h5->state = H5_ACTIVE; |
cd1b4425 | 348 | hci_uart_init_ready(hu); |
40f10224 | 349 | return; |
10122d07 JH |
350 | } else if (memcmp(data, sleep_req, 2) == 0) { |
351 | BT_DBG("Peer went to sleep"); | |
95c5c220 JH |
352 | h5->sleep = H5_SLEEPING; |
353 | return; | |
10122d07 JH |
354 | } else if (memcmp(data, woken_req, 2) == 0) { |
355 | BT_DBG("Peer woke up"); | |
95c5c220 JH |
356 | h5->sleep = H5_AWAKE; |
357 | } else if (memcmp(data, wakeup_req, 2) == 0) { | |
358 | BT_DBG("Peer requested wakeup"); | |
359 | h5_link_control(hu, woken_req, 2); | |
360 | h5->sleep = H5_AWAKE; | |
40f10224 JH |
361 | } else { |
362 | BT_DBG("Link Control: 0x%02hhx 0x%02hhx", data[0], data[1]); | |
363 | return; | |
364 | } | |
365 | ||
366 | hci_uart_tx_wakeup(hu); | |
bc1f35b9 JH |
367 | } |
368 | ||
369 | static void h5_complete_rx_pkt(struct hci_uart *hu) | |
370 | { | |
371 | struct h5 *h5 = hu->priv; | |
43eb12d7 | 372 | const unsigned char *hdr = h5->rx_skb->data; |
bc1f35b9 | 373 | |
43eb12d7 | 374 | if (H5_HDR_RELIABLE(hdr)) { |
40f10224 | 375 | h5->tx_ack = (h5->tx_ack + 1) % 8; |
e0482103 | 376 | set_bit(H5_TX_ACK_REQ, &h5->flags); |
40f10224 | 377 | hci_uart_tx_wakeup(hu); |
43eb12d7 | 378 | } |
bc1f35b9 | 379 | |
43eb12d7 JH |
380 | h5->rx_ack = H5_HDR_ACK(hdr); |
381 | ||
382 | h5_pkt_cull(h5); | |
383 | ||
384 | switch (H5_HDR_PKT_TYPE(hdr)) { | |
bc1f35b9 JH |
385 | case HCI_EVENT_PKT: |
386 | case HCI_ACLDATA_PKT: | |
387 | case HCI_SCODATA_PKT: | |
618e8bc2 | 388 | hci_skb_pkt_type(h5->rx_skb) = H5_HDR_PKT_TYPE(hdr); |
bc1f35b9 JH |
389 | |
390 | /* Remove Three-wire header */ | |
391 | skb_pull(h5->rx_skb, 4); | |
392 | ||
e1a26170 | 393 | hci_recv_frame(hu->hdev, h5->rx_skb); |
bc1f35b9 JH |
394 | h5->rx_skb = NULL; |
395 | ||
396 | break; | |
397 | ||
398 | default: | |
399 | h5_handle_internal_rx(hu); | |
400 | break; | |
401 | } | |
402 | ||
403 | h5_reset_rx(h5); | |
404 | } | |
405 | ||
406 | static int h5_rx_crc(struct hci_uart *hu, unsigned char c) | |
407 | { | |
bc1f35b9 | 408 | h5_complete_rx_pkt(hu); |
bc1f35b9 JH |
409 | |
410 | return 0; | |
411 | } | |
412 | ||
413 | static int h5_rx_payload(struct hci_uart *hu, unsigned char c) | |
414 | { | |
415 | struct h5 *h5 = hu->priv; | |
416 | const unsigned char *hdr = h5->rx_skb->data; | |
417 | ||
43eb12d7 | 418 | if (H5_HDR_CRC(hdr)) { |
bc1f35b9 JH |
419 | h5->rx_func = h5_rx_crc; |
420 | h5->rx_pending = 2; | |
421 | } else { | |
422 | h5_complete_rx_pkt(hu); | |
bc1f35b9 JH |
423 | } |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | static int h5_rx_3wire_hdr(struct hci_uart *hu, unsigned char c) | |
429 | { | |
430 | struct h5 *h5 = hu->priv; | |
431 | const unsigned char *hdr = h5->rx_skb->data; | |
432 | ||
40f10224 JH |
433 | BT_DBG("%s rx: seq %u ack %u crc %u rel %u type %u len %u", |
434 | hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr), | |
435 | H5_HDR_CRC(hdr), H5_HDR_RELIABLE(hdr), H5_HDR_PKT_TYPE(hdr), | |
436 | H5_HDR_LEN(hdr)); | |
437 | ||
bc1f35b9 JH |
438 | if (((hdr[0] + hdr[1] + hdr[2] + hdr[3]) & 0xff) != 0xff) { |
439 | BT_ERR("Invalid header checksum"); | |
440 | h5_reset_rx(h5); | |
441 | return 0; | |
442 | } | |
443 | ||
40f10224 | 444 | if (H5_HDR_RELIABLE(hdr) && H5_HDR_SEQ(hdr) != h5->tx_ack) { |
43eb12d7 | 445 | BT_ERR("Out-of-order packet arrived (%u != %u)", |
40f10224 | 446 | H5_HDR_SEQ(hdr), h5->tx_ack); |
43eb12d7 JH |
447 | h5_reset_rx(h5); |
448 | return 0; | |
449 | } | |
450 | ||
f674a057 JH |
451 | if (h5->state != H5_ACTIVE && |
452 | H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT) { | |
453 | BT_ERR("Non-link packet received in non-active state"); | |
454 | h5_reset_rx(h5); | |
48439d50 | 455 | return 0; |
f674a057 JH |
456 | } |
457 | ||
bc1f35b9 | 458 | h5->rx_func = h5_rx_payload; |
43eb12d7 | 459 | h5->rx_pending = H5_HDR_LEN(hdr); |
bc1f35b9 JH |
460 | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static int h5_rx_pkt_start(struct hci_uart *hu, unsigned char c) | |
465 | { | |
466 | struct h5 *h5 = hu->priv; | |
467 | ||
bc1f35b9 JH |
468 | if (c == SLIP_DELIMITER) |
469 | return 1; | |
470 | ||
471 | h5->rx_func = h5_rx_3wire_hdr; | |
472 | h5->rx_pending = 4; | |
473 | ||
474 | h5->rx_skb = bt_skb_alloc(H5_MAX_LEN, GFP_ATOMIC); | |
475 | if (!h5->rx_skb) { | |
476 | BT_ERR("Can't allocate mem for new packet"); | |
477 | h5_reset_rx(h5); | |
478 | return -ENOMEM; | |
479 | } | |
480 | ||
4a2fa2b8 | 481 | h5->rx_skb->dev = (void *)hu->hdev; |
bc1f35b9 JH |
482 | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static int h5_rx_delimiter(struct hci_uart *hu, unsigned char c) | |
487 | { | |
488 | struct h5 *h5 = hu->priv; | |
489 | ||
bc1f35b9 JH |
490 | if (c == SLIP_DELIMITER) |
491 | h5->rx_func = h5_rx_pkt_start; | |
492 | ||
493 | return 1; | |
494 | } | |
495 | ||
496 | static void h5_unslip_one_byte(struct h5 *h5, unsigned char c) | |
497 | { | |
498 | const u8 delim = SLIP_DELIMITER, esc = SLIP_ESC; | |
499 | const u8 *byte = &c; | |
500 | ||
e0482103 JH |
501 | if (!test_bit(H5_RX_ESC, &h5->flags) && c == SLIP_ESC) { |
502 | set_bit(H5_RX_ESC, &h5->flags); | |
bc1f35b9 JH |
503 | return; |
504 | } | |
505 | ||
e0482103 | 506 | if (test_and_clear_bit(H5_RX_ESC, &h5->flags)) { |
bc1f35b9 JH |
507 | switch (c) { |
508 | case SLIP_ESC_DELIM: | |
509 | byte = &delim; | |
510 | break; | |
511 | case SLIP_ESC_ESC: | |
512 | byte = &esc; | |
513 | break; | |
514 | default: | |
515 | BT_ERR("Invalid esc byte 0x%02hhx", c); | |
516 | h5_reset_rx(h5); | |
517 | return; | |
518 | } | |
bc1f35b9 JH |
519 | } |
520 | ||
59ae1d12 | 521 | skb_put_data(h5->rx_skb, byte, 1); |
bc1f35b9 JH |
522 | h5->rx_pending--; |
523 | ||
98df7446 | 524 | BT_DBG("unslipped 0x%02hhx, rx_pending %zu", *byte, h5->rx_pending); |
bc1f35b9 JH |
525 | } |
526 | ||
527 | static void h5_reset_rx(struct h5 *h5) | |
528 | { | |
529 | if (h5->rx_skb) { | |
530 | kfree_skb(h5->rx_skb); | |
531 | h5->rx_skb = NULL; | |
532 | } | |
533 | ||
534 | h5->rx_func = h5_rx_delimiter; | |
535 | h5->rx_pending = 0; | |
e0482103 | 536 | clear_bit(H5_RX_ESC, &h5->flags); |
bc1f35b9 JH |
537 | } |
538 | ||
9d1c40eb | 539 | static int h5_recv(struct hci_uart *hu, const void *data, int count) |
7dec65c8 | 540 | { |
bc1f35b9 | 541 | struct h5 *h5 = hu->priv; |
9d1c40eb | 542 | const unsigned char *ptr = data; |
bc1f35b9 | 543 | |
255a68e0 JH |
544 | BT_DBG("%s pending %zu count %d", hu->hdev->name, h5->rx_pending, |
545 | count); | |
bc1f35b9 JH |
546 | |
547 | while (count > 0) { | |
548 | int processed; | |
549 | ||
550 | if (h5->rx_pending > 0) { | |
551 | if (*ptr == SLIP_DELIMITER) { | |
552 | BT_ERR("Too short H5 packet"); | |
553 | h5_reset_rx(h5); | |
554 | continue; | |
555 | } | |
556 | ||
557 | h5_unslip_one_byte(h5, *ptr); | |
558 | ||
559 | ptr++; count--; | |
560 | continue; | |
561 | } | |
562 | ||
563 | processed = h5->rx_func(hu, *ptr); | |
564 | if (processed < 0) | |
565 | return processed; | |
566 | ||
567 | ptr += processed; | |
568 | count -= processed; | |
569 | } | |
570 | ||
571 | return 0; | |
7dec65c8 JH |
572 | } |
573 | ||
574 | static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
575 | { | |
7d664fba JH |
576 | struct h5 *h5 = hu->priv; |
577 | ||
578 | if (skb->len > 0xfff) { | |
579 | BT_ERR("Packet too long (%u bytes)", skb->len); | |
580 | kfree_skb(skb); | |
581 | return 0; | |
582 | } | |
583 | ||
f674a057 JH |
584 | if (h5->state != H5_ACTIVE) { |
585 | BT_ERR("Ignoring HCI data in non-active state"); | |
586 | kfree_skb(skb); | |
587 | return 0; | |
588 | } | |
589 | ||
618e8bc2 | 590 | switch (hci_skb_pkt_type(skb)) { |
7d664fba JH |
591 | case HCI_ACLDATA_PKT: |
592 | case HCI_COMMAND_PKT: | |
593 | skb_queue_tail(&h5->rel, skb); | |
594 | break; | |
595 | ||
596 | case HCI_SCODATA_PKT: | |
597 | skb_queue_tail(&h5->unrel, skb); | |
598 | break; | |
599 | ||
600 | default: | |
618e8bc2 | 601 | BT_ERR("Unknown packet type %u", hci_skb_pkt_type(skb)); |
7d664fba JH |
602 | kfree_skb(skb); |
603 | break; | |
604 | } | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
c0a1b73c JH |
609 | static void h5_slip_delim(struct sk_buff *skb) |
610 | { | |
611 | const char delim = SLIP_DELIMITER; | |
612 | ||
59ae1d12 | 613 | skb_put_data(skb, &delim, 1); |
c0a1b73c JH |
614 | } |
615 | ||
616 | static void h5_slip_one_byte(struct sk_buff *skb, u8 c) | |
617 | { | |
618 | const char esc_delim[2] = { SLIP_ESC, SLIP_ESC_DELIM }; | |
619 | const char esc_esc[2] = { SLIP_ESC, SLIP_ESC_ESC }; | |
620 | ||
621 | switch (c) { | |
622 | case SLIP_DELIMITER: | |
59ae1d12 | 623 | skb_put_data(skb, &esc_delim, 2); |
c0a1b73c JH |
624 | break; |
625 | case SLIP_ESC: | |
59ae1d12 | 626 | skb_put_data(skb, &esc_esc, 2); |
c0a1b73c JH |
627 | break; |
628 | default: | |
59ae1d12 | 629 | skb_put_data(skb, &c, 1); |
c0a1b73c JH |
630 | } |
631 | } | |
632 | ||
c826ed09 JH |
633 | static bool valid_packet_type(u8 type) |
634 | { | |
635 | switch (type) { | |
636 | case HCI_ACLDATA_PKT: | |
637 | case HCI_COMMAND_PKT: | |
638 | case HCI_SCODATA_PKT: | |
639 | case HCI_3WIRE_LINK_PKT: | |
640 | case HCI_3WIRE_ACK_PKT: | |
641 | return true; | |
642 | default: | |
643 | return false; | |
644 | } | |
645 | } | |
646 | ||
647 | static struct sk_buff *h5_prepare_pkt(struct hci_uart *hu, u8 pkt_type, | |
648 | const u8 *data, size_t len) | |
7d664fba | 649 | { |
40f10224 | 650 | struct h5 *h5 = hu->priv; |
c0a1b73c JH |
651 | struct sk_buff *nskb; |
652 | u8 hdr[4]; | |
653 | int i; | |
654 | ||
c826ed09 JH |
655 | if (!valid_packet_type(pkt_type)) { |
656 | BT_ERR("Unknown packet type %u", pkt_type); | |
657 | return NULL; | |
658 | } | |
659 | ||
c0a1b73c JH |
660 | /* |
661 | * Max len of packet: (original len + 4 (H5 hdr) + 2 (crc)) * 2 | |
662 | * (because bytes 0xc0 and 0xdb are escaped, worst case is when | |
663 | * the packet is all made of 0xc0 and 0xdb) + 2 (0xc0 | |
664 | * delimiters at start and end). | |
665 | */ | |
666 | nskb = alloc_skb((len + 6) * 2 + 2, GFP_ATOMIC); | |
667 | if (!nskb) | |
668 | return NULL; | |
669 | ||
618e8bc2 | 670 | hci_skb_pkt_type(nskb) = pkt_type; |
c0a1b73c JH |
671 | |
672 | h5_slip_delim(nskb); | |
673 | ||
40f10224 | 674 | hdr[0] = h5->tx_ack << 3; |
e0482103 | 675 | clear_bit(H5_TX_ACK_REQ, &h5->flags); |
c0a1b73c | 676 | |
c826ed09 JH |
677 | /* Reliable packet? */ |
678 | if (pkt_type == HCI_ACLDATA_PKT || pkt_type == HCI_COMMAND_PKT) { | |
c0a1b73c | 679 | hdr[0] |= 1 << 7; |
43eb12d7 JH |
680 | hdr[0] |= h5->tx_seq; |
681 | h5->tx_seq = (h5->tx_seq + 1) % 8; | |
c0a1b73c JH |
682 | } |
683 | ||
684 | hdr[1] = pkt_type | ((len & 0x0f) << 4); | |
685 | hdr[2] = len >> 4; | |
686 | hdr[3] = ~((hdr[0] + hdr[1] + hdr[2]) & 0xff); | |
687 | ||
40f10224 JH |
688 | BT_DBG("%s tx: seq %u ack %u crc %u rel %u type %u len %u", |
689 | hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr), | |
690 | H5_HDR_CRC(hdr), H5_HDR_RELIABLE(hdr), H5_HDR_PKT_TYPE(hdr), | |
691 | H5_HDR_LEN(hdr)); | |
692 | ||
c0a1b73c JH |
693 | for (i = 0; i < 4; i++) |
694 | h5_slip_one_byte(nskb, hdr[i]); | |
695 | ||
696 | for (i = 0; i < len; i++) | |
697 | h5_slip_one_byte(nskb, data[i]); | |
698 | ||
699 | h5_slip_delim(nskb); | |
700 | ||
701 | return nskb; | |
702 | } | |
703 | ||
7dec65c8 JH |
704 | static struct sk_buff *h5_dequeue(struct hci_uart *hu) |
705 | { | |
7d664fba | 706 | struct h5 *h5 = hu->priv; |
3f27e95b | 707 | unsigned long flags; |
7d664fba JH |
708 | struct sk_buff *skb, *nskb; |
709 | ||
95c5c220 JH |
710 | if (h5->sleep != H5_AWAKE) { |
711 | const unsigned char wakeup_req[] = { 0x05, 0xfa }; | |
712 | ||
713 | if (h5->sleep == H5_WAKING_UP) | |
714 | return NULL; | |
715 | ||
716 | h5->sleep = H5_WAKING_UP; | |
717 | BT_DBG("Sending wakeup request"); | |
718 | ||
719 | mod_timer(&h5->timer, jiffies + HZ / 100); | |
720 | return h5_prepare_pkt(hu, HCI_3WIRE_LINK_PKT, wakeup_req, 2); | |
721 | } | |
722 | ||
a08b15e6 | 723 | skb = skb_dequeue(&h5->unrel); |
4a2fa2b8 | 724 | if (skb) { |
618e8bc2 | 725 | nskb = h5_prepare_pkt(hu, hci_skb_pkt_type(skb), |
c0a1b73c | 726 | skb->data, skb->len); |
7d664fba JH |
727 | if (nskb) { |
728 | kfree_skb(skb); | |
729 | return nskb; | |
730 | } | |
731 | ||
732 | skb_queue_head(&h5->unrel, skb); | |
733 | BT_ERR("Could not dequeue pkt because alloc_skb failed"); | |
734 | } | |
735 | ||
3f27e95b JH |
736 | spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); |
737 | ||
afdc944c | 738 | if (h5->unack.qlen >= h5->tx_win) |
3f27e95b JH |
739 | goto unlock; |
740 | ||
a08b15e6 | 741 | skb = skb_dequeue(&h5->rel); |
4a2fa2b8 | 742 | if (skb) { |
618e8bc2 | 743 | nskb = h5_prepare_pkt(hu, hci_skb_pkt_type(skb), |
c0a1b73c | 744 | skb->data, skb->len); |
3f27e95b JH |
745 | if (nskb) { |
746 | __skb_queue_tail(&h5->unack, skb); | |
747 | mod_timer(&h5->timer, jiffies + H5_ACK_TIMEOUT); | |
748 | spin_unlock_irqrestore(&h5->unack.lock, flags); | |
749 | return nskb; | |
750 | } | |
751 | ||
752 | skb_queue_head(&h5->rel, skb); | |
753 | BT_ERR("Could not dequeue pkt because alloc_skb failed"); | |
754 | } | |
755 | ||
756 | unlock: | |
757 | spin_unlock_irqrestore(&h5->unack.lock, flags); | |
758 | ||
e0482103 | 759 | if (test_bit(H5_TX_ACK_REQ, &h5->flags)) |
40f10224 | 760 | return h5_prepare_pkt(hu, HCI_3WIRE_ACK_PKT, NULL, 0); |
7d664fba | 761 | |
7dec65c8 JH |
762 | return NULL; |
763 | } | |
764 | ||
765 | static int h5_flush(struct hci_uart *hu) | |
766 | { | |
7d664fba JH |
767 | BT_DBG("hu %p", hu); |
768 | return 0; | |
7dec65c8 JH |
769 | } |
770 | ||
4ee7ef19 | 771 | static const struct hci_uart_proto h5p = { |
7dec65c8 | 772 | .id = HCI_UART_3WIRE, |
7c40fb8d | 773 | .name = "Three-wire (H5)", |
7dec65c8 JH |
774 | .open = h5_open, |
775 | .close = h5_close, | |
4eb3cbc4 | 776 | .setup = h5_setup, |
7dec65c8 JH |
777 | .recv = h5_recv, |
778 | .enqueue = h5_enqueue, | |
779 | .dequeue = h5_dequeue, | |
780 | .flush = h5_flush, | |
781 | }; | |
782 | ||
ce945552 HG |
783 | static int h5_serdev_probe(struct serdev_device *serdev) |
784 | { | |
4eb3cbc4 | 785 | const struct acpi_device_id *match; |
ce945552 HG |
786 | struct device *dev = &serdev->dev; |
787 | struct h5 *h5; | |
788 | ||
789 | h5 = devm_kzalloc(dev, sizeof(*h5), GFP_KERNEL); | |
790 | if (!h5) | |
791 | return -ENOMEM; | |
792 | ||
793 | set_bit(HCI_UART_RESET_ON_INIT, &h5->serdev_hu.flags); | |
794 | ||
795 | h5->hu = &h5->serdev_hu; | |
796 | h5->serdev_hu.serdev = serdev; | |
797 | serdev_device_set_drvdata(serdev, h5); | |
798 | ||
4eb3cbc4 JC |
799 | if (has_acpi_companion(dev)) { |
800 | match = acpi_match_device(dev->driver->acpi_match_table, dev); | |
801 | if (!match) | |
802 | return -ENODEV; | |
803 | ||
804 | h5->vnd = (const struct h5_vnd *)match->driver_data; | |
805 | h5->id = (char *)match->id; | |
4c791489 HG |
806 | |
807 | if (h5->vnd->acpi_gpio_map) | |
808 | devm_acpi_dev_add_driver_gpios(dev, | |
809 | h5->vnd->acpi_gpio_map); | |
4eb3cbc4 JC |
810 | } |
811 | ||
4c791489 HG |
812 | h5->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); |
813 | if (IS_ERR(h5->enable_gpio)) | |
814 | return PTR_ERR(h5->enable_gpio); | |
815 | ||
816 | h5->device_wake_gpio = devm_gpiod_get_optional(dev, "device-wake", | |
817 | GPIOD_OUT_LOW); | |
818 | if (IS_ERR(h5->device_wake_gpio)) | |
819 | return PTR_ERR(h5->device_wake_gpio); | |
820 | ||
ce945552 HG |
821 | return hci_uart_register_device(&h5->serdev_hu, &h5p); |
822 | } | |
823 | ||
824 | static void h5_serdev_remove(struct serdev_device *serdev) | |
825 | { | |
826 | struct h5 *h5 = serdev_device_get_drvdata(serdev); | |
827 | ||
828 | hci_uart_unregister_device(&h5->serdev_hu); | |
829 | } | |
830 | ||
28a75e4c HG |
831 | static int __maybe_unused h5_serdev_suspend(struct device *dev) |
832 | { | |
833 | struct h5 *h5 = dev_get_drvdata(dev); | |
834 | int ret = 0; | |
835 | ||
836 | if (h5->vnd && h5->vnd->suspend) | |
837 | ret = h5->vnd->suspend(h5); | |
838 | ||
839 | return ret; | |
840 | } | |
841 | ||
842 | static int __maybe_unused h5_serdev_resume(struct device *dev) | |
843 | { | |
844 | struct h5 *h5 = dev_get_drvdata(dev); | |
845 | int ret = 0; | |
846 | ||
847 | if (h5->vnd && h5->vnd->resume) | |
848 | ret = h5->vnd->resume(h5); | |
849 | ||
850 | return ret; | |
851 | } | |
852 | ||
b9763cdf | 853 | #ifdef CONFIG_BT_HCIUART_RTL |
b825d7c4 JC |
854 | static int h5_btrtl_setup(struct h5 *h5) |
855 | { | |
856 | struct btrtl_device_info *btrtl_dev; | |
857 | struct sk_buff *skb; | |
858 | __le32 baudrate_data; | |
859 | u32 device_baudrate; | |
860 | unsigned int controller_baudrate; | |
861 | bool flow_control; | |
862 | int err; | |
863 | ||
864 | btrtl_dev = btrtl_initialize(h5->hu->hdev, h5->id); | |
865 | if (IS_ERR(btrtl_dev)) | |
866 | return PTR_ERR(btrtl_dev); | |
867 | ||
868 | err = btrtl_get_uart_settings(h5->hu->hdev, btrtl_dev, | |
869 | &controller_baudrate, &device_baudrate, | |
870 | &flow_control); | |
871 | if (err) | |
872 | goto out_free; | |
873 | ||
874 | baudrate_data = cpu_to_le32(device_baudrate); | |
875 | skb = __hci_cmd_sync(h5->hu->hdev, 0xfc17, sizeof(baudrate_data), | |
876 | &baudrate_data, HCI_INIT_TIMEOUT); | |
877 | if (IS_ERR(skb)) { | |
878 | rtl_dev_err(h5->hu->hdev, "set baud rate command failed\n"); | |
879 | err = PTR_ERR(skb); | |
880 | goto out_free; | |
881 | } else { | |
882 | kfree_skb(skb); | |
883 | } | |
884 | /* Give the device some time to set up the new baudrate. */ | |
885 | usleep_range(10000, 20000); | |
886 | ||
887 | serdev_device_set_baudrate(h5->hu->serdev, controller_baudrate); | |
888 | serdev_device_set_flow_control(h5->hu->serdev, flow_control); | |
889 | ||
890 | err = btrtl_download_firmware(h5->hu->hdev, btrtl_dev); | |
891 | /* Give the device some time before the hci-core sends it a reset */ | |
892 | usleep_range(10000, 20000); | |
893 | ||
894 | out_free: | |
895 | btrtl_free(btrtl_dev); | |
896 | ||
897 | return err; | |
898 | } | |
899 | ||
900 | static void h5_btrtl_open(struct h5 *h5) | |
901 | { | |
902 | /* Devices always start with these fixed parameters */ | |
903 | serdev_device_set_flow_control(h5->hu->serdev, false); | |
904 | serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN); | |
905 | serdev_device_set_baudrate(h5->hu->serdev, 115200); | |
4c791489 HG |
906 | |
907 | /* The controller needs up to 500ms to wakeup */ | |
908 | gpiod_set_value_cansleep(h5->enable_gpio, 1); | |
909 | gpiod_set_value_cansleep(h5->device_wake_gpio, 1); | |
910 | msleep(500); | |
b825d7c4 JC |
911 | } |
912 | ||
4c791489 HG |
913 | static void h5_btrtl_close(struct h5 *h5) |
914 | { | |
915 | gpiod_set_value_cansleep(h5->device_wake_gpio, 0); | |
916 | gpiod_set_value_cansleep(h5->enable_gpio, 0); | |
917 | } | |
918 | ||
8589086f HG |
919 | /* Suspend/resume support. On many devices the RTL BT device loses power during |
920 | * suspend/resume, causing it to lose its firmware and all state. So we simply | |
921 | * turn it off on suspend and reprobe on resume. This mirrors how RTL devices | |
922 | * are handled in the USB driver, where the USB_QUIRK_RESET_RESUME is used which | |
923 | * also causes a reprobe on resume. | |
924 | */ | |
925 | static int h5_btrtl_suspend(struct h5 *h5) | |
926 | { | |
927 | serdev_device_set_flow_control(h5->hu->serdev, false); | |
928 | gpiod_set_value_cansleep(h5->device_wake_gpio, 0); | |
929 | gpiod_set_value_cansleep(h5->enable_gpio, 0); | |
930 | return 0; | |
931 | } | |
932 | ||
933 | struct h5_btrtl_reprobe { | |
934 | struct device *dev; | |
935 | struct work_struct work; | |
936 | }; | |
937 | ||
938 | static void h5_btrtl_reprobe_worker(struct work_struct *work) | |
939 | { | |
940 | struct h5_btrtl_reprobe *reprobe = | |
941 | container_of(work, struct h5_btrtl_reprobe, work); | |
942 | int ret; | |
943 | ||
944 | ret = device_reprobe(reprobe->dev); | |
945 | if (ret && ret != -EPROBE_DEFER) | |
946 | dev_err(reprobe->dev, "Reprobe error %d\n", ret); | |
947 | ||
948 | put_device(reprobe->dev); | |
949 | kfree(reprobe); | |
950 | module_put(THIS_MODULE); | |
951 | } | |
952 | ||
953 | static int h5_btrtl_resume(struct h5 *h5) | |
954 | { | |
955 | struct h5_btrtl_reprobe *reprobe; | |
956 | ||
957 | reprobe = kzalloc(sizeof(*reprobe), GFP_KERNEL); | |
958 | if (!reprobe) | |
959 | return -ENOMEM; | |
960 | ||
961 | __module_get(THIS_MODULE); | |
962 | ||
963 | INIT_WORK(&reprobe->work, h5_btrtl_reprobe_worker); | |
964 | reprobe->dev = get_device(&h5->hu->serdev->dev); | |
965 | queue_work(system_long_wq, &reprobe->work); | |
966 | return 0; | |
967 | } | |
968 | ||
4c791489 HG |
969 | static const struct acpi_gpio_params btrtl_device_wake_gpios = { 0, 0, false }; |
970 | static const struct acpi_gpio_params btrtl_enable_gpios = { 1, 0, false }; | |
971 | static const struct acpi_gpio_params btrtl_host_wake_gpios = { 2, 0, false }; | |
972 | static const struct acpi_gpio_mapping acpi_btrtl_gpios[] = { | |
973 | { "device-wake-gpios", &btrtl_device_wake_gpios, 1 }, | |
974 | { "enable-gpios", &btrtl_enable_gpios, 1 }, | |
975 | { "host-wake-gpios", &btrtl_host_wake_gpios, 1 }, | |
976 | {}, | |
977 | }; | |
978 | ||
b825d7c4 JC |
979 | static struct h5_vnd rtl_vnd = { |
980 | .setup = h5_btrtl_setup, | |
981 | .open = h5_btrtl_open, | |
4c791489 | 982 | .close = h5_btrtl_close, |
8589086f HG |
983 | .suspend = h5_btrtl_suspend, |
984 | .resume = h5_btrtl_resume, | |
4c791489 | 985 | .acpi_gpio_map = acpi_btrtl_gpios, |
b825d7c4 | 986 | }; |
b9763cdf | 987 | #endif |
b825d7c4 JC |
988 | |
989 | #ifdef CONFIG_ACPI | |
990 | static const struct acpi_device_id h5_acpi_match[] = { | |
b9763cdf | 991 | #ifdef CONFIG_BT_HCIUART_RTL |
b825d7c4 | 992 | { "OBDA8723", (kernel_ulong_t)&rtl_vnd }, |
b9763cdf | 993 | #endif |
b825d7c4 JC |
994 | { }, |
995 | }; | |
996 | MODULE_DEVICE_TABLE(acpi, h5_acpi_match); | |
997 | #endif | |
998 | ||
28a75e4c HG |
999 | static const struct dev_pm_ops h5_serdev_pm_ops = { |
1000 | SET_SYSTEM_SLEEP_PM_OPS(h5_serdev_suspend, h5_serdev_resume) | |
1001 | }; | |
1002 | ||
ce945552 HG |
1003 | static struct serdev_device_driver h5_serdev_driver = { |
1004 | .probe = h5_serdev_probe, | |
1005 | .remove = h5_serdev_remove, | |
1006 | .driver = { | |
1007 | .name = "hci_uart_h5", | |
b825d7c4 | 1008 | .acpi_match_table = ACPI_PTR(h5_acpi_match), |
28a75e4c | 1009 | .pm = &h5_serdev_pm_ops, |
ce945552 HG |
1010 | }, |
1011 | }; | |
1012 | ||
7dec65c8 JH |
1013 | int __init h5_init(void) |
1014 | { | |
ce945552 | 1015 | serdev_device_driver_register(&h5_serdev_driver); |
01009eec | 1016 | return hci_uart_register_proto(&h5p); |
7dec65c8 JH |
1017 | } |
1018 | ||
1019 | int __exit h5_deinit(void) | |
1020 | { | |
ce945552 | 1021 | serdev_device_driver_unregister(&h5_serdev_driver); |
7dec65c8 JH |
1022 | return hci_uart_unregister_proto(&h5p); |
1023 | } |