Commit | Line | Data |
---|---|---|
e9a2dd26 MH |
1 | /* |
2 | * | |
3 | * Bluetooth HCI UART driver for Broadcom devices | |
4 | * | |
5 | * Copyright (C) 2015 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 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/skbuff.h> | |
18aeb444 | 27 | #include <linux/firmware.h> |
0395ffc1 FD |
28 | #include <linux/module.h> |
29 | #include <linux/acpi.h> | |
33cd149e LP |
30 | #include <linux/of.h> |
31 | #include <linux/property.h> | |
0395ffc1 FD |
32 | #include <linux/platform_device.h> |
33 | #include <linux/clk.h> | |
34 | #include <linux/gpio/consumer.h> | |
35 | #include <linux/tty.h> | |
6cc4396c | 36 | #include <linux/interrupt.h> |
5cebdfea | 37 | #include <linux/dmi.h> |
e88ab30d | 38 | #include <linux/pm_runtime.h> |
33cd149e | 39 | #include <linux/serdev.h> |
e9a2dd26 MH |
40 | |
41 | #include <net/bluetooth/bluetooth.h> | |
42 | #include <net/bluetooth/hci_core.h> | |
43 | ||
bdd8818e | 44 | #include "btbcm.h" |
e9a2dd26 | 45 | #include "hci_uart.h" |
bdd8818e | 46 | |
01d5e44a MH |
47 | #define BCM_NULL_PKT 0x00 |
48 | #define BCM_NULL_SIZE 0 | |
49 | ||
94c58132 MH |
50 | #define BCM_LM_DIAG_PKT 0x07 |
51 | #define BCM_LM_DIAG_SIZE 63 | |
52 | ||
e88ab30d FD |
53 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
54 | ||
33cd149e | 55 | /* platform device driver resources */ |
0395ffc1 FD |
56 | struct bcm_device { |
57 | struct list_head list; | |
58 | ||
c0d3ce58 | 59 | struct device *dev; |
0395ffc1 FD |
60 | |
61 | const char *name; | |
62 | struct gpio_desc *device_wakeup; | |
63 | struct gpio_desc *shutdown; | |
64 | ||
65 | struct clk *clk; | |
66 | bool clk_enabled; | |
ae056908 FD |
67 | |
68 | u32 init_speed; | |
74183a1c | 69 | u32 oper_speed; |
6cc4396c | 70 | int irq; |
227630cc | 71 | bool irq_active_low; |
118612fb | 72 | |
b7a622a2 | 73 | #ifdef CONFIG_PM |
118612fb FD |
74 | struct hci_uart *hu; |
75 | bool is_suspended; /* suspend/resume flag */ | |
76 | #endif | |
0395ffc1 FD |
77 | }; |
78 | ||
33cd149e LP |
79 | /* serdev driver resources */ |
80 | struct bcm_serdev { | |
81 | struct hci_uart hu; | |
82 | }; | |
83 | ||
84 | /* generic bcm uart resources */ | |
bdd8818e | 85 | struct bcm_data { |
0395ffc1 FD |
86 | struct sk_buff *rx_skb; |
87 | struct sk_buff_head txq; | |
88 | ||
89 | struct bcm_device *dev; | |
bdd8818e MH |
90 | }; |
91 | ||
0395ffc1 | 92 | /* List of BCM BT UART devices */ |
bb3ea16a | 93 | static DEFINE_MUTEX(bcm_device_lock); |
0395ffc1 FD |
94 | static LIST_HEAD(bcm_device_list); |
95 | ||
33cd149e LP |
96 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
97 | { | |
98 | if (hu->serdev) | |
99 | serdev_device_set_baudrate(hu->serdev, speed); | |
100 | else | |
101 | hci_uart_set_baudrate(hu, speed); | |
102 | } | |
103 | ||
61b2fc2b FD |
104 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
105 | { | |
106 | struct hci_dev *hdev = hu->hdev; | |
107 | struct sk_buff *skb; | |
108 | struct bcm_update_uart_baud_rate param; | |
109 | ||
110 | if (speed > 3000000) { | |
111 | struct bcm_write_uart_clock_setting clock; | |
112 | ||
113 | clock.type = BCM_UART_CLOCK_48MHZ; | |
114 | ||
65ad07c9 | 115 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
61b2fc2b FD |
116 | |
117 | /* This Broadcom specific command changes the UART's controller | |
118 | * clock for baud rate > 3000000. | |
119 | */ | |
120 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); | |
121 | if (IS_ERR(skb)) { | |
122 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
123 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
124 | err); | |
61b2fc2b FD |
125 | return err; |
126 | } | |
127 | ||
128 | kfree_skb(skb); | |
129 | } | |
130 | ||
65ad07c9 | 131 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
61b2fc2b FD |
132 | |
133 | param.zero = cpu_to_le16(0); | |
134 | param.baud_rate = cpu_to_le32(speed); | |
135 | ||
136 | /* This Broadcom specific command changes the UART's controller baud | |
137 | * rate. | |
138 | */ | |
139 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, | |
140 | HCI_INIT_TIMEOUT); | |
141 | if (IS_ERR(skb)) { | |
142 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
143 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
144 | err); | |
61b2fc2b FD |
145 | return err; |
146 | } | |
147 | ||
148 | kfree_skb(skb); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
917522aa | 153 | /* bcm_device_exists should be protected by bcm_device_lock */ |
0395ffc1 FD |
154 | static bool bcm_device_exists(struct bcm_device *device) |
155 | { | |
156 | struct list_head *p; | |
157 | ||
158 | list_for_each(p, &bcm_device_list) { | |
159 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
160 | ||
161 | if (device == dev) | |
162 | return true; | |
163 | } | |
164 | ||
165 | return false; | |
166 | } | |
167 | ||
168 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) | |
169 | { | |
170 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) | |
730ce397 | 171 | clk_prepare_enable(dev->clk); |
0395ffc1 | 172 | |
2af0a709 LP |
173 | gpiod_set_value(dev->shutdown, powered); |
174 | gpiod_set_value(dev->device_wakeup, powered); | |
0395ffc1 FD |
175 | |
176 | if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) | |
730ce397 | 177 | clk_disable_unprepare(dev->clk); |
0395ffc1 FD |
178 | |
179 | dev->clk_enabled = powered; | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
b7a622a2 | 184 | #ifdef CONFIG_PM |
6cc4396c FD |
185 | static irqreturn_t bcm_host_wake(int irq, void *data) |
186 | { | |
187 | struct bcm_device *bdev = data; | |
188 | ||
189 | bt_dev_dbg(bdev, "Host wake IRQ"); | |
190 | ||
c0d3ce58 HG |
191 | pm_runtime_get(bdev->dev); |
192 | pm_runtime_mark_last_busy(bdev->dev); | |
193 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 194 | |
6cc4396c FD |
195 | return IRQ_HANDLED; |
196 | } | |
197 | ||
198 | static int bcm_request_irq(struct bcm_data *bcm) | |
199 | { | |
200 | struct bcm_device *bdev = bcm->dev; | |
98dc77d5 | 201 | int err; |
6cc4396c FD |
202 | |
203 | /* If this is not a platform device, do not enable PM functionalities */ | |
204 | mutex_lock(&bcm_device_lock); | |
205 | if (!bcm_device_exists(bdev)) { | |
206 | err = -ENODEV; | |
207 | goto unlock; | |
208 | } | |
209 | ||
98dc77d5 LP |
210 | if (bdev->irq <= 0) { |
211 | err = -EOPNOTSUPP; | |
212 | goto unlock; | |
213 | } | |
6cc4396c | 214 | |
c0d3ce58 | 215 | err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
227630cc HG |
216 | bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
217 | IRQF_TRIGGER_RISING, | |
218 | "host_wake", bdev); | |
98dc77d5 LP |
219 | if (err) |
220 | goto unlock; | |
e88ab30d | 221 | |
c0d3ce58 | 222 | device_init_wakeup(bdev->dev, true); |
98dc77d5 | 223 | |
c0d3ce58 | 224 | pm_runtime_set_autosuspend_delay(bdev->dev, |
98dc77d5 | 225 | BCM_AUTOSUSPEND_DELAY); |
c0d3ce58 HG |
226 | pm_runtime_use_autosuspend(bdev->dev); |
227 | pm_runtime_set_active(bdev->dev); | |
228 | pm_runtime_enable(bdev->dev); | |
6cc4396c FD |
229 | |
230 | unlock: | |
231 | mutex_unlock(&bcm_device_lock); | |
232 | ||
233 | return err; | |
234 | } | |
235 | ||
236 | static const struct bcm_set_sleep_mode default_sleep_params = { | |
237 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ | |
238 | .idle_host = 2, /* idle threshold HOST, in 300ms */ | |
239 | .idle_dev = 2, /* idle threshold device, in 300ms */ | |
240 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ | |
241 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ | |
242 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ | |
e88ab30d | 243 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
6cc4396c FD |
244 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
245 | /* Irrelevant USB flags */ | |
246 | .usb_auto_sleep = 0, | |
247 | .usb_resume_timeout = 0, | |
248 | .pulsed_host_wake = 0, | |
249 | .break_to_host = 0 | |
250 | }; | |
251 | ||
252 | static int bcm_setup_sleep(struct hci_uart *hu) | |
253 | { | |
254 | struct bcm_data *bcm = hu->priv; | |
255 | struct sk_buff *skb; | |
256 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; | |
257 | ||
227630cc | 258 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
6cc4396c FD |
259 | |
260 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), | |
261 | &sleep_params, HCI_INIT_TIMEOUT); | |
262 | if (IS_ERR(skb)) { | |
263 | int err = PTR_ERR(skb); | |
264 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); | |
265 | return err; | |
266 | } | |
267 | kfree_skb(skb); | |
268 | ||
269 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); | |
270 | ||
271 | return 0; | |
272 | } | |
273 | #else | |
274 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } | |
275 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } | |
276 | #endif | |
277 | ||
075e1f5e MH |
278 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
279 | { | |
280 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
281 | struct bcm_data *bcm = hu->priv; | |
282 | struct sk_buff *skb; | |
283 | ||
284 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
285 | return -ENETDOWN; | |
286 | ||
287 | skb = bt_skb_alloc(3, GFP_KERNEL); | |
a1857390 DC |
288 | if (!skb) |
289 | return -ENOMEM; | |
075e1f5e | 290 | |
634fef61 JB |
291 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
292 | skb_put_u8(skb, 0xf0); | |
293 | skb_put_u8(skb, enable); | |
075e1f5e MH |
294 | |
295 | skb_queue_tail(&bcm->txq, skb); | |
296 | hci_uart_tx_wakeup(hu); | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
bdd8818e MH |
301 | static int bcm_open(struct hci_uart *hu) |
302 | { | |
303 | struct bcm_data *bcm; | |
0395ffc1 | 304 | struct list_head *p; |
bdd8818e | 305 | |
65ad07c9 | 306 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
307 | |
308 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); | |
309 | if (!bcm) | |
310 | return -ENOMEM; | |
311 | ||
312 | skb_queue_head_init(&bcm->txq); | |
313 | ||
314 | hu->priv = bcm; | |
0395ffc1 | 315 | |
33cd149e LP |
316 | /* If this is a serdev defined device, then only use |
317 | * serdev open primitive and skip the rest. | |
318 | */ | |
319 | if (hu->serdev) { | |
320 | serdev_device_open(hu->serdev); | |
321 | goto out; | |
322 | } | |
323 | ||
95065a61 JH |
324 | if (!hu->tty->dev) |
325 | goto out; | |
326 | ||
bb3ea16a | 327 | mutex_lock(&bcm_device_lock); |
0395ffc1 FD |
328 | list_for_each(p, &bcm_device_list) { |
329 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
330 | ||
331 | /* Retrieve saved bcm_device based on parent of the | |
332 | * platform device (saved during device probe) and | |
333 | * parent of tty device used by hci_uart | |
334 | */ | |
c0d3ce58 | 335 | if (hu->tty->dev->parent == dev->dev->parent) { |
0395ffc1 | 336 | bcm->dev = dev; |
ae056908 | 337 | hu->init_speed = dev->init_speed; |
74183a1c | 338 | hu->oper_speed = dev->oper_speed; |
b7a622a2 | 339 | #ifdef CONFIG_PM |
118612fb FD |
340 | dev->hu = hu; |
341 | #endif | |
6cc4396c | 342 | bcm_gpio_set_power(bcm->dev, true); |
0395ffc1 FD |
343 | break; |
344 | } | |
345 | } | |
346 | ||
bb3ea16a | 347 | mutex_unlock(&bcm_device_lock); |
95065a61 | 348 | out: |
bdd8818e MH |
349 | return 0; |
350 | } | |
351 | ||
352 | static int bcm_close(struct hci_uart *hu) | |
353 | { | |
354 | struct bcm_data *bcm = hu->priv; | |
6cc4396c | 355 | struct bcm_device *bdev = bcm->dev; |
bdd8818e | 356 | |
65ad07c9 | 357 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 358 | |
33cd149e LP |
359 | /* If this is a serdev defined device, only use serdev |
360 | * close primitive and then continue as usual. | |
361 | */ | |
362 | if (hu->serdev) | |
363 | serdev_device_close(hu->serdev); | |
364 | ||
0395ffc1 | 365 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 366 | mutex_lock(&bcm_device_lock); |
6cc4396c FD |
367 | if (bcm_device_exists(bdev)) { |
368 | bcm_gpio_set_power(bdev, false); | |
b7a622a2 | 369 | #ifdef CONFIG_PM |
c0d3ce58 HG |
370 | pm_runtime_disable(bdev->dev); |
371 | pm_runtime_set_suspended(bdev->dev); | |
e88ab30d | 372 | |
c0d3ce58 HG |
373 | if (device_can_wakeup(bdev->dev)) { |
374 | devm_free_irq(bdev->dev, bdev->irq, bdev); | |
375 | device_init_wakeup(bdev->dev, false); | |
6cc4396c FD |
376 | } |
377 | ||
378 | bdev->hu = NULL; | |
118612fb FD |
379 | #endif |
380 | } | |
bb3ea16a | 381 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 382 | |
bdd8818e MH |
383 | skb_queue_purge(&bcm->txq); |
384 | kfree_skb(bcm->rx_skb); | |
385 | kfree(bcm); | |
386 | ||
387 | hu->priv = NULL; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static int bcm_flush(struct hci_uart *hu) | |
392 | { | |
393 | struct bcm_data *bcm = hu->priv; | |
394 | ||
65ad07c9 | 395 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
396 | |
397 | skb_queue_purge(&bcm->txq); | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
402 | static int bcm_setup(struct hci_uart *hu) | |
403 | { | |
6cc4396c | 404 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
405 | char fw_name[64]; |
406 | const struct firmware *fw; | |
960ef1d7 | 407 | unsigned int speed; |
6be09b48 FD |
408 | int err; |
409 | ||
65ad07c9 | 410 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 411 | |
075e1f5e | 412 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
413 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
414 | ||
6be09b48 FD |
415 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
416 | if (err) | |
417 | return err; | |
418 | ||
419 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
420 | if (err < 0) { | |
65ad07c9 | 421 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
422 | return 0; |
423 | } | |
424 | ||
425 | err = btbcm_patchram(hu->hdev, fw); | |
426 | if (err) { | |
65ad07c9 | 427 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
428 | goto finalize; |
429 | } | |
430 | ||
960ef1d7 FD |
431 | /* Init speed if any */ |
432 | if (hu->init_speed) | |
433 | speed = hu->init_speed; | |
434 | else if (hu->proto->init_speed) | |
435 | speed = hu->proto->init_speed; | |
436 | else | |
437 | speed = 0; | |
438 | ||
439 | if (speed) | |
33cd149e | 440 | host_set_baudrate(hu, speed); |
960ef1d7 FD |
441 | |
442 | /* Operational speed if any */ | |
443 | if (hu->oper_speed) | |
444 | speed = hu->oper_speed; | |
445 | else if (hu->proto->oper_speed) | |
446 | speed = hu->proto->oper_speed; | |
447 | else | |
448 | speed = 0; | |
449 | ||
450 | if (speed) { | |
451 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 452 | if (!err) |
33cd149e | 453 | host_set_baudrate(hu, speed); |
61b2fc2b FD |
454 | } |
455 | ||
6be09b48 FD |
456 | finalize: |
457 | release_firmware(fw); | |
458 | ||
459 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
460 | if (err) |
461 | return err; | |
462 | ||
cdd24a20 | 463 | if (!bcm_request_irq(bcm)) |
6cc4396c | 464 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
465 | |
466 | return err; | |
bdd8818e MH |
467 | } |
468 | ||
94c58132 MH |
469 | #define BCM_RECV_LM_DIAG \ |
470 | .type = BCM_LM_DIAG_PKT, \ | |
471 | .hlen = BCM_LM_DIAG_SIZE, \ | |
472 | .loff = 0, \ | |
473 | .lsize = 0, \ | |
474 | .maxlen = BCM_LM_DIAG_SIZE | |
475 | ||
01d5e44a MH |
476 | #define BCM_RECV_NULL \ |
477 | .type = BCM_NULL_PKT, \ | |
478 | .hlen = BCM_NULL_SIZE, \ | |
479 | .loff = 0, \ | |
480 | .lsize = 0, \ | |
481 | .maxlen = BCM_NULL_SIZE | |
482 | ||
79b8df93 | 483 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
484 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
485 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
486 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
487 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
01d5e44a | 488 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
79b8df93 MH |
489 | }; |
490 | ||
bdd8818e MH |
491 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
492 | { | |
493 | struct bcm_data *bcm = hu->priv; | |
494 | ||
495 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
496 | return -EUNATCH; | |
497 | ||
79b8df93 MH |
498 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
499 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
500 | if (IS_ERR(bcm->rx_skb)) { |
501 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 502 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 503 | bcm->rx_skb = NULL; |
bdd8818e | 504 | return err; |
e88ab30d FD |
505 | } else if (!bcm->rx_skb) { |
506 | /* Delay auto-suspend when receiving completed packet */ | |
507 | mutex_lock(&bcm_device_lock); | |
508 | if (bcm->dev && bcm_device_exists(bcm->dev)) { | |
c0d3ce58 HG |
509 | pm_runtime_get(bcm->dev->dev); |
510 | pm_runtime_mark_last_busy(bcm->dev->dev); | |
511 | pm_runtime_put_autosuspend(bcm->dev->dev); | |
e88ab30d FD |
512 | } |
513 | mutex_unlock(&bcm_device_lock); | |
bdd8818e MH |
514 | } |
515 | ||
516 | return count; | |
517 | } | |
518 | ||
519 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
520 | { | |
521 | struct bcm_data *bcm = hu->priv; | |
522 | ||
65ad07c9 | 523 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
524 | |
525 | /* Prepend skb with frame type */ | |
618e8bc2 | 526 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
527 | skb_queue_tail(&bcm->txq, skb); |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
533 | { | |
534 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
535 | struct sk_buff *skb = NULL; |
536 | struct bcm_device *bdev = NULL; | |
537 | ||
538 | mutex_lock(&bcm_device_lock); | |
539 | ||
540 | if (bcm_device_exists(bcm->dev)) { | |
541 | bdev = bcm->dev; | |
c0d3ce58 | 542 | pm_runtime_get_sync(bdev->dev); |
e88ab30d FD |
543 | /* Shall be resumed here */ |
544 | } | |
545 | ||
546 | skb = skb_dequeue(&bcm->txq); | |
547 | ||
548 | if (bdev) { | |
c0d3ce58 HG |
549 | pm_runtime_mark_last_busy(bdev->dev); |
550 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 551 | } |
bdd8818e | 552 | |
e88ab30d FD |
553 | mutex_unlock(&bcm_device_lock); |
554 | ||
555 | return skb; | |
bdd8818e MH |
556 | } |
557 | ||
b7a622a2 FD |
558 | #ifdef CONFIG_PM |
559 | static int bcm_suspend_device(struct device *dev) | |
118612fb FD |
560 | { |
561 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
562 | ||
b7a622a2 | 563 | bt_dev_dbg(bdev, ""); |
917522aa | 564 | |
b7a622a2 | 565 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
566 | hci_uart_set_flow_control(bdev->hu, true); |
567 | ||
b7a622a2 | 568 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
569 | bdev->is_suspended = true; |
570 | } | |
571 | ||
572 | /* Suspend the device */ | |
573 | if (bdev->device_wakeup) { | |
574 | gpiod_set_value(bdev->device_wakeup, false); | |
65ad07c9 | 575 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
118612fb FD |
576 | mdelay(15); |
577 | } | |
578 | ||
b7a622a2 FD |
579 | return 0; |
580 | } | |
581 | ||
582 | static int bcm_resume_device(struct device *dev) | |
583 | { | |
584 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
585 | ||
586 | bt_dev_dbg(bdev, ""); | |
587 | ||
588 | if (bdev->device_wakeup) { | |
589 | gpiod_set_value(bdev->device_wakeup, true); | |
590 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); | |
591 | mdelay(15); | |
592 | } | |
593 | ||
594 | /* When this executes, the device has woken up already */ | |
595 | if (bdev->is_suspended && bdev->hu) { | |
596 | bdev->is_suspended = false; | |
597 | ||
598 | hci_uart_set_flow_control(bdev->hu, false); | |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | #endif | |
604 | ||
605 | #ifdef CONFIG_PM_SLEEP | |
606 | /* Platform suspend callback */ | |
607 | static int bcm_suspend(struct device *dev) | |
608 | { | |
609 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
610 | int error; | |
611 | ||
612 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
613 | ||
614 | /* bcm_suspend can be called at any time as long as platform device is | |
615 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
616 | * and device_wake-up GPIO. | |
617 | */ | |
618 | mutex_lock(&bcm_device_lock); | |
619 | ||
620 | if (!bdev->hu) | |
621 | goto unlock; | |
622 | ||
e88ab30d FD |
623 | if (pm_runtime_active(dev)) |
624 | bcm_suspend_device(dev); | |
b7a622a2 | 625 | |
c0d3ce58 | 626 | if (device_may_wakeup(dev)) { |
6cc4396c FD |
627 | error = enable_irq_wake(bdev->irq); |
628 | if (!error) | |
629 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
630 | } | |
631 | ||
917522aa | 632 | unlock: |
bb3ea16a | 633 | mutex_unlock(&bcm_device_lock); |
917522aa | 634 | |
118612fb FD |
635 | return 0; |
636 | } | |
637 | ||
638 | /* Platform resume callback */ | |
639 | static int bcm_resume(struct device *dev) | |
640 | { | |
641 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
642 | ||
65ad07c9 | 643 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 644 | |
b7a622a2 FD |
645 | /* bcm_resume can be called at any time as long as platform device is |
646 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
647 | * and device_wake-up GPIO. | |
648 | */ | |
bb3ea16a | 649 | mutex_lock(&bcm_device_lock); |
917522aa FD |
650 | |
651 | if (!bdev->hu) | |
652 | goto unlock; | |
653 | ||
c0d3ce58 | 654 | if (device_may_wakeup(dev)) { |
6cc4396c FD |
655 | disable_irq_wake(bdev->irq); |
656 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
657 | } | |
658 | ||
b7a622a2 | 659 | bcm_resume_device(dev); |
118612fb | 660 | |
917522aa | 661 | unlock: |
bb3ea16a | 662 | mutex_unlock(&bcm_device_lock); |
917522aa | 663 | |
e88ab30d FD |
664 | pm_runtime_disable(dev); |
665 | pm_runtime_set_active(dev); | |
666 | pm_runtime_enable(dev); | |
667 | ||
118612fb FD |
668 | return 0; |
669 | } | |
670 | #endif | |
671 | ||
89ab37b4 DD |
672 | static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; |
673 | static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; | |
674 | static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; | |
675 | ||
676 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
677 | { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, | |
678 | { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, | |
679 | { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, | |
680 | { }, | |
681 | }; | |
682 | ||
683 | static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; | |
684 | static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; | |
685 | static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; | |
686 | ||
687 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { | |
688 | { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, | |
689 | { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, | |
690 | { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, | |
0395ffc1 FD |
691 | { }, |
692 | }; | |
693 | ||
50d78bcf | 694 | #ifdef CONFIG_ACPI |
5cebdfea | 695 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ |
227630cc | 696 | static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = { |
5cebdfea FD |
697 | { |
698 | .ident = "Asus T100TA", | |
699 | .matches = { | |
700 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
701 | "ASUSTeK COMPUTER INC."), | |
702 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), | |
703 | }, | |
5cebdfea | 704 | }, |
c4c285da HG |
705 | { |
706 | .ident = "Asus T100CHI", | |
707 | .matches = { | |
708 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
709 | "ASUSTeK COMPUTER INC."), | |
710 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"), | |
711 | }, | |
c4c285da | 712 | }, |
5e2bd93b JB |
713 | { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ |
714 | .ident = "Lenovo ThinkPad 8", | |
715 | .matches = { | |
716 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
717 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), | |
718 | }, | |
5e2bd93b | 719 | }, |
5cebdfea FD |
720 | { } |
721 | }; | |
722 | ||
ae056908 FD |
723 | static int bcm_resource(struct acpi_resource *ares, void *data) |
724 | { | |
725 | struct bcm_device *dev = data; | |
6cc4396c FD |
726 | struct acpi_resource_extended_irq *irq; |
727 | struct acpi_resource_gpio *gpio; | |
728 | struct acpi_resource_uart_serialbus *sb; | |
729 | ||
730 | switch (ares->type) { | |
731 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
732 | irq = &ares->data.extended_irq; | |
227630cc | 733 | dev->irq_active_low = irq->polarity == ACPI_ACTIVE_LOW; |
6cc4396c FD |
734 | break; |
735 | ||
736 | case ACPI_RESOURCE_TYPE_GPIO: | |
737 | gpio = &ares->data.gpio; | |
738 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
227630cc | 739 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
6cc4396c FD |
740 | break; |
741 | ||
742 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 | 743 | sb = &ares->data.uart_serial_bus; |
74183a1c | 744 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
ae056908 | 745 | dev->init_speed = sb->default_baud_rate; |
74183a1c MH |
746 | dev->oper_speed = 4000000; |
747 | } | |
6cc4396c FD |
748 | break; |
749 | ||
750 | default: | |
751 | break; | |
ae056908 FD |
752 | } |
753 | ||
754 | /* Always tell the ACPI core to skip this resource */ | |
755 | return 1; | |
756 | } | |
212d7183 | 757 | #endif /* CONFIG_ACPI */ |
ae056908 | 758 | |
42ef18f0 | 759 | static int bcm_get_resources(struct bcm_device *dev) |
0395ffc1 | 760 | { |
c0d3ce58 | 761 | dev->name = dev_name(dev->dev); |
0395ffc1 | 762 | |
c0d3ce58 | 763 | dev->clk = devm_clk_get(dev->dev, NULL); |
89ab37b4 | 764 | |
c0d3ce58 | 765 | dev->device_wakeup = devm_gpiod_get_optional(dev->dev, |
62aaefa7 UKK |
766 | "device-wakeup", |
767 | GPIOD_OUT_LOW); | |
768 | if (IS_ERR(dev->device_wakeup)) | |
769 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 770 | |
c0d3ce58 | 771 | dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", |
62aaefa7 UKK |
772 | GPIOD_OUT_LOW); |
773 | if (IS_ERR(dev->shutdown)) | |
774 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 775 | |
6cc4396c | 776 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
6cc4396c FD |
777 | if (dev->irq <= 0) { |
778 | struct gpio_desc *gpio; | |
779 | ||
c0d3ce58 | 780 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", |
6cc4396c FD |
781 | GPIOD_IN); |
782 | if (IS_ERR(gpio)) | |
783 | return PTR_ERR(gpio); | |
784 | ||
785 | dev->irq = gpiod_to_irq(gpio); | |
786 | } | |
787 | ||
c0d3ce58 | 788 | dev_info(dev->dev, "BCM irq: %d\n", dev->irq); |
6cc4396c | 789 | |
0395ffc1 FD |
790 | /* Make sure at-least one of the GPIO is defined and that |
791 | * a name is specified for this instance | |
792 | */ | |
793 | if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) { | |
c0d3ce58 | 794 | dev_err(dev->dev, "invalid platform data\n"); |
0395ffc1 FD |
795 | return -EINVAL; |
796 | } | |
797 | ||
212d7183 AS |
798 | return 0; |
799 | } | |
800 | ||
801 | #ifdef CONFIG_ACPI | |
802 | static int bcm_acpi_probe(struct bcm_device *dev) | |
803 | { | |
212d7183 AS |
804 | LIST_HEAD(resources); |
805 | const struct dmi_system_id *dmi_id; | |
806 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; | |
807 | const struct acpi_device_id *id; | |
808 | int ret; | |
809 | ||
810 | /* Retrieve GPIO data */ | |
c0d3ce58 | 811 | id = acpi_match_device(dev->dev->driver->acpi_match_table, dev->dev); |
212d7183 AS |
812 | if (id) |
813 | gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; | |
814 | ||
c0d3ce58 | 815 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); |
212d7183 AS |
816 | if (ret) |
817 | return ret; | |
818 | ||
ae056908 | 819 | /* Retrieve UART ACPI info */ |
c0d3ce58 | 820 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
e98d6d62 | 821 | &resources, bcm_resource, dev); |
5be00284 JN |
822 | if (ret < 0) |
823 | return ret; | |
09dbf1b7 | 824 | acpi_dev_free_resource_list(&resources); |
ae056908 | 825 | |
227630cc | 826 | dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); |
5cebdfea FD |
827 | if (dmi_id) { |
828 | bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low", | |
829 | dmi_id->ident); | |
227630cc | 830 | dev->irq_active_low = true; |
5cebdfea FD |
831 | } |
832 | ||
0395ffc1 FD |
833 | return 0; |
834 | } | |
50d78bcf FD |
835 | #else |
836 | static int bcm_acpi_probe(struct bcm_device *dev) | |
837 | { | |
838 | return -EINVAL; | |
839 | } | |
840 | #endif /* CONFIG_ACPI */ | |
0395ffc1 FD |
841 | |
842 | static int bcm_probe(struct platform_device *pdev) | |
843 | { | |
844 | struct bcm_device *dev; | |
0395ffc1 FD |
845 | int ret; |
846 | ||
847 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
848 | if (!dev) | |
849 | return -ENOMEM; | |
850 | ||
c0d3ce58 | 851 | dev->dev = &pdev->dev; |
4a56f891 | 852 | dev->irq = platform_get_irq(pdev, 0); |
0395ffc1 | 853 | |
201762e2 | 854 | if (has_acpi_companion(&pdev->dev)) { |
212d7183 | 855 | ret = bcm_acpi_probe(dev); |
201762e2 HG |
856 | if (ret) |
857 | return ret; | |
858 | } | |
859 | ||
42ef18f0 | 860 | ret = bcm_get_resources(dev); |
4d1c4558 JN |
861 | if (ret) |
862 | return ret; | |
0395ffc1 FD |
863 | |
864 | platform_set_drvdata(pdev, dev); | |
865 | ||
866 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
867 | ||
868 | /* Place this instance on the device list */ | |
bb3ea16a | 869 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 870 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 871 | mutex_unlock(&bcm_device_lock); |
0395ffc1 FD |
872 | |
873 | bcm_gpio_set_power(dev, false); | |
874 | ||
875 | return 0; | |
876 | } | |
877 | ||
878 | static int bcm_remove(struct platform_device *pdev) | |
879 | { | |
880 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
881 | ||
bb3ea16a | 882 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 883 | list_del(&dev->list); |
bb3ea16a | 884 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 885 | |
0395ffc1 FD |
886 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
bdd8818e MH |
891 | static const struct hci_uart_proto bcm_proto = { |
892 | .id = HCI_UART_BCM, | |
143f0a28 | 893 | .name = "Broadcom", |
aee61f7a | 894 | .manufacturer = 15, |
61b2fc2b | 895 | .init_speed = 115200, |
bdd8818e MH |
896 | .open = bcm_open, |
897 | .close = bcm_close, | |
898 | .flush = bcm_flush, | |
899 | .setup = bcm_setup, | |
61b2fc2b | 900 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
901 | .recv = bcm_recv, |
902 | .enqueue = bcm_enqueue, | |
903 | .dequeue = bcm_dequeue, | |
904 | }; | |
905 | ||
0395ffc1 FD |
906 | #ifdef CONFIG_ACPI |
907 | static const struct acpi_device_id bcm_acpi_match[] = { | |
89ab37b4 DD |
908 | { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
909 | { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
910 | { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
911 | { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
912 | { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
913 | { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
914 | { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
915 | { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
916 | { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
917 | { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
918 | { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
919 | { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
920 | { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
921 | { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
922 | { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
923 | { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
0395ffc1 FD |
924 | { }, |
925 | }; | |
926 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
927 | #endif | |
928 | ||
118612fb | 929 | /* Platform suspend and resume callbacks */ |
e88ab30d FD |
930 | static const struct dev_pm_ops bcm_pm_ops = { |
931 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
932 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
933 | }; | |
118612fb | 934 | |
0395ffc1 FD |
935 | static struct platform_driver bcm_driver = { |
936 | .probe = bcm_probe, | |
937 | .remove = bcm_remove, | |
938 | .driver = { | |
939 | .name = "hci_bcm", | |
940 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 941 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
942 | }, |
943 | }; | |
944 | ||
33cd149e LP |
945 | static int bcm_serdev_probe(struct serdev_device *serdev) |
946 | { | |
947 | struct bcm_serdev *bcmdev; | |
948 | u32 speed; | |
949 | int err; | |
950 | ||
951 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); | |
952 | if (!bcmdev) | |
953 | return -ENOMEM; | |
954 | ||
955 | bcmdev->hu.serdev = serdev; | |
956 | serdev_device_set_drvdata(serdev, bcmdev); | |
957 | ||
958 | err = device_property_read_u32(&serdev->dev, "max-speed", &speed); | |
959 | if (!err) | |
960 | bcmdev->hu.oper_speed = speed; | |
961 | ||
962 | return hci_uart_register_device(&bcmdev->hu, &bcm_proto); | |
963 | } | |
964 | ||
965 | static void bcm_serdev_remove(struct serdev_device *serdev) | |
966 | { | |
967 | struct bcm_serdev *bcmdev = serdev_device_get_drvdata(serdev); | |
968 | ||
969 | hci_uart_unregister_device(&bcmdev->hu); | |
970 | } | |
971 | ||
972 | #ifdef CONFIG_OF | |
973 | static const struct of_device_id bcm_bluetooth_of_match[] = { | |
974 | { .compatible = "brcm,bcm43438-bt" }, | |
975 | { }, | |
976 | }; | |
977 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); | |
978 | #endif | |
979 | ||
980 | static struct serdev_device_driver bcm_serdev_driver = { | |
981 | .probe = bcm_serdev_probe, | |
982 | .remove = bcm_serdev_remove, | |
983 | .driver = { | |
984 | .name = "hci_uart_bcm", | |
985 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), | |
986 | }, | |
987 | }; | |
988 | ||
bdd8818e MH |
989 | int __init bcm_init(void) |
990 | { | |
33cd149e LP |
991 | /* For now, we need to keep both platform device |
992 | * driver (ACPI generated) and serdev driver (DT). | |
993 | */ | |
0395ffc1 | 994 | platform_driver_register(&bcm_driver); |
33cd149e | 995 | serdev_device_driver_register(&bcm_serdev_driver); |
0395ffc1 | 996 | |
bdd8818e MH |
997 | return hci_uart_register_proto(&bcm_proto); |
998 | } | |
999 | ||
1000 | int __exit bcm_deinit(void) | |
1001 | { | |
0395ffc1 | 1002 | platform_driver_unregister(&bcm_driver); |
33cd149e | 1003 | serdev_device_driver_unregister(&bcm_serdev_driver); |
0395ffc1 | 1004 | |
bdd8818e MH |
1005 | return hci_uart_unregister_proto(&bcm_proto); |
1006 | } |