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Commit | Line | Data |
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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 | ||
8a920568 | 55 | /* device driver resources */ |
0395ffc1 | 56 | struct bcm_device { |
8a920568 HG |
57 | /* Must be the first member, hci_serdev.c expects this. */ |
58 | struct hci_uart serdev_hu; | |
0395ffc1 FD |
59 | struct list_head list; |
60 | ||
c0d3ce58 | 61 | struct device *dev; |
0395ffc1 FD |
62 | |
63 | const char *name; | |
64 | struct gpio_desc *device_wakeup; | |
65 | struct gpio_desc *shutdown; | |
66 | ||
67 | struct clk *clk; | |
68 | bool clk_enabled; | |
ae056908 FD |
69 | |
70 | u32 init_speed; | |
74183a1c | 71 | u32 oper_speed; |
6cc4396c | 72 | int irq; |
227630cc | 73 | bool irq_active_low; |
118612fb | 74 | |
b7a622a2 | 75 | #ifdef CONFIG_PM |
118612fb FD |
76 | struct hci_uart *hu; |
77 | bool is_suspended; /* suspend/resume flag */ | |
78 | #endif | |
0395ffc1 FD |
79 | }; |
80 | ||
33cd149e | 81 | /* generic bcm uart resources */ |
bdd8818e | 82 | struct bcm_data { |
0395ffc1 FD |
83 | struct sk_buff *rx_skb; |
84 | struct sk_buff_head txq; | |
85 | ||
86 | struct bcm_device *dev; | |
bdd8818e MH |
87 | }; |
88 | ||
0395ffc1 | 89 | /* List of BCM BT UART devices */ |
bb3ea16a | 90 | static DEFINE_MUTEX(bcm_device_lock); |
0395ffc1 FD |
91 | static LIST_HEAD(bcm_device_list); |
92 | ||
5bffac2b HG |
93 | static int irq_polarity = -1; |
94 | module_param(irq_polarity, int, 0444); | |
95 | MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); | |
96 | ||
33cd149e LP |
97 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
98 | { | |
99 | if (hu->serdev) | |
100 | serdev_device_set_baudrate(hu->serdev, speed); | |
101 | else | |
102 | hci_uart_set_baudrate(hu, speed); | |
103 | } | |
104 | ||
61b2fc2b FD |
105 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
106 | { | |
107 | struct hci_dev *hdev = hu->hdev; | |
108 | struct sk_buff *skb; | |
109 | struct bcm_update_uart_baud_rate param; | |
110 | ||
111 | if (speed > 3000000) { | |
112 | struct bcm_write_uart_clock_setting clock; | |
113 | ||
114 | clock.type = BCM_UART_CLOCK_48MHZ; | |
115 | ||
65ad07c9 | 116 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
61b2fc2b FD |
117 | |
118 | /* This Broadcom specific command changes the UART's controller | |
119 | * clock for baud rate > 3000000. | |
120 | */ | |
121 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); | |
122 | if (IS_ERR(skb)) { | |
123 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
124 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
125 | err); | |
61b2fc2b FD |
126 | return err; |
127 | } | |
128 | ||
129 | kfree_skb(skb); | |
130 | } | |
131 | ||
65ad07c9 | 132 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
61b2fc2b FD |
133 | |
134 | param.zero = cpu_to_le16(0); | |
135 | param.baud_rate = cpu_to_le32(speed); | |
136 | ||
137 | /* This Broadcom specific command changes the UART's controller baud | |
138 | * rate. | |
139 | */ | |
140 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, | |
141 | HCI_INIT_TIMEOUT); | |
142 | if (IS_ERR(skb)) { | |
143 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
144 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
145 | err); | |
61b2fc2b FD |
146 | return err; |
147 | } | |
148 | ||
149 | kfree_skb(skb); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
917522aa | 154 | /* bcm_device_exists should be protected by bcm_device_lock */ |
0395ffc1 FD |
155 | static bool bcm_device_exists(struct bcm_device *device) |
156 | { | |
157 | struct list_head *p; | |
158 | ||
81a19053 | 159 | #ifdef CONFIG_PM |
8a920568 HG |
160 | /* Devices using serdev always exist */ |
161 | if (device && device->hu && device->hu->serdev) | |
162 | return true; | |
81a19053 | 163 | #endif |
8a920568 | 164 | |
0395ffc1 FD |
165 | list_for_each(p, &bcm_device_list) { |
166 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
167 | ||
168 | if (device == dev) | |
169 | return true; | |
170 | } | |
171 | ||
172 | return false; | |
173 | } | |
174 | ||
175 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) | |
176 | { | |
177 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) | |
730ce397 | 178 | clk_prepare_enable(dev->clk); |
0395ffc1 | 179 | |
2af0a709 LP |
180 | gpiod_set_value(dev->shutdown, powered); |
181 | gpiod_set_value(dev->device_wakeup, powered); | |
0395ffc1 FD |
182 | |
183 | if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) | |
730ce397 | 184 | clk_disable_unprepare(dev->clk); |
0395ffc1 FD |
185 | |
186 | dev->clk_enabled = powered; | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
b7a622a2 | 191 | #ifdef CONFIG_PM |
6cc4396c FD |
192 | static irqreturn_t bcm_host_wake(int irq, void *data) |
193 | { | |
194 | struct bcm_device *bdev = data; | |
195 | ||
196 | bt_dev_dbg(bdev, "Host wake IRQ"); | |
197 | ||
c0d3ce58 HG |
198 | pm_runtime_get(bdev->dev); |
199 | pm_runtime_mark_last_busy(bdev->dev); | |
200 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 201 | |
6cc4396c FD |
202 | return IRQ_HANDLED; |
203 | } | |
204 | ||
205 | static int bcm_request_irq(struct bcm_data *bcm) | |
206 | { | |
207 | struct bcm_device *bdev = bcm->dev; | |
98dc77d5 | 208 | int err; |
6cc4396c | 209 | |
6cc4396c FD |
210 | mutex_lock(&bcm_device_lock); |
211 | if (!bcm_device_exists(bdev)) { | |
212 | err = -ENODEV; | |
213 | goto unlock; | |
214 | } | |
215 | ||
98dc77d5 LP |
216 | if (bdev->irq <= 0) { |
217 | err = -EOPNOTSUPP; | |
218 | goto unlock; | |
219 | } | |
6cc4396c | 220 | |
c0d3ce58 | 221 | err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
227630cc HG |
222 | bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
223 | IRQF_TRIGGER_RISING, | |
224 | "host_wake", bdev); | |
98dc77d5 LP |
225 | if (err) |
226 | goto unlock; | |
e88ab30d | 227 | |
c0d3ce58 | 228 | device_init_wakeup(bdev->dev, true); |
98dc77d5 | 229 | |
c0d3ce58 | 230 | pm_runtime_set_autosuspend_delay(bdev->dev, |
98dc77d5 | 231 | BCM_AUTOSUSPEND_DELAY); |
c0d3ce58 HG |
232 | pm_runtime_use_autosuspend(bdev->dev); |
233 | pm_runtime_set_active(bdev->dev); | |
234 | pm_runtime_enable(bdev->dev); | |
6cc4396c FD |
235 | |
236 | unlock: | |
237 | mutex_unlock(&bcm_device_lock); | |
238 | ||
239 | return err; | |
240 | } | |
241 | ||
242 | static const struct bcm_set_sleep_mode default_sleep_params = { | |
243 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ | |
244 | .idle_host = 2, /* idle threshold HOST, in 300ms */ | |
245 | .idle_dev = 2, /* idle threshold device, in 300ms */ | |
246 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ | |
247 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ | |
248 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ | |
e88ab30d | 249 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
6cc4396c FD |
250 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
251 | /* Irrelevant USB flags */ | |
252 | .usb_auto_sleep = 0, | |
253 | .usb_resume_timeout = 0, | |
254 | .pulsed_host_wake = 0, | |
255 | .break_to_host = 0 | |
256 | }; | |
257 | ||
258 | static int bcm_setup_sleep(struct hci_uart *hu) | |
259 | { | |
260 | struct bcm_data *bcm = hu->priv; | |
261 | struct sk_buff *skb; | |
262 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; | |
263 | ||
227630cc | 264 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
6cc4396c FD |
265 | |
266 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), | |
267 | &sleep_params, HCI_INIT_TIMEOUT); | |
268 | if (IS_ERR(skb)) { | |
269 | int err = PTR_ERR(skb); | |
270 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); | |
271 | return err; | |
272 | } | |
273 | kfree_skb(skb); | |
274 | ||
275 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | #else | |
280 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } | |
281 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } | |
282 | #endif | |
283 | ||
075e1f5e MH |
284 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
285 | { | |
286 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
287 | struct bcm_data *bcm = hu->priv; | |
288 | struct sk_buff *skb; | |
289 | ||
290 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
291 | return -ENETDOWN; | |
292 | ||
293 | skb = bt_skb_alloc(3, GFP_KERNEL); | |
a1857390 DC |
294 | if (!skb) |
295 | return -ENOMEM; | |
075e1f5e | 296 | |
634fef61 JB |
297 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
298 | skb_put_u8(skb, 0xf0); | |
299 | skb_put_u8(skb, enable); | |
075e1f5e MH |
300 | |
301 | skb_queue_tail(&bcm->txq, skb); | |
302 | hci_uart_tx_wakeup(hu); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
bdd8818e MH |
307 | static int bcm_open(struct hci_uart *hu) |
308 | { | |
309 | struct bcm_data *bcm; | |
0395ffc1 | 310 | struct list_head *p; |
bdd8818e | 311 | |
65ad07c9 | 312 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 313 | |
94d81df9 VD |
314 | if (!hci_uart_has_flow_control(hu)) |
315 | return -EOPNOTSUPP; | |
316 | ||
bdd8818e MH |
317 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); |
318 | if (!bcm) | |
319 | return -ENOMEM; | |
320 | ||
321 | skb_queue_head_init(&bcm->txq); | |
322 | ||
323 | hu->priv = bcm; | |
0395ffc1 | 324 | |
8a920568 HG |
325 | mutex_lock(&bcm_device_lock); |
326 | ||
33cd149e LP |
327 | if (hu->serdev) { |
328 | serdev_device_open(hu->serdev); | |
8a920568 | 329 | bcm->dev = serdev_device_get_drvdata(hu->serdev); |
33cd149e LP |
330 | goto out; |
331 | } | |
332 | ||
95065a61 JH |
333 | if (!hu->tty->dev) |
334 | goto out; | |
335 | ||
0395ffc1 FD |
336 | list_for_each(p, &bcm_device_list) { |
337 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
338 | ||
339 | /* Retrieve saved bcm_device based on parent of the | |
340 | * platform device (saved during device probe) and | |
341 | * parent of tty device used by hci_uart | |
342 | */ | |
c0d3ce58 | 343 | if (hu->tty->dev->parent == dev->dev->parent) { |
0395ffc1 | 344 | bcm->dev = dev; |
b7a622a2 | 345 | #ifdef CONFIG_PM |
118612fb FD |
346 | dev->hu = hu; |
347 | #endif | |
0395ffc1 FD |
348 | break; |
349 | } | |
350 | } | |
351 | ||
95065a61 | 352 | out: |
8a920568 HG |
353 | if (bcm->dev) { |
354 | hu->init_speed = bcm->dev->init_speed; | |
355 | hu->oper_speed = bcm->dev->oper_speed; | |
356 | bcm_gpio_set_power(bcm->dev, true); | |
357 | } | |
358 | ||
359 | mutex_unlock(&bcm_device_lock); | |
bdd8818e MH |
360 | return 0; |
361 | } | |
362 | ||
363 | static int bcm_close(struct hci_uart *hu) | |
364 | { | |
365 | struct bcm_data *bcm = hu->priv; | |
8a920568 | 366 | struct bcm_device *bdev = NULL; |
bdd8818e | 367 | |
65ad07c9 | 368 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 369 | |
0395ffc1 | 370 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 371 | mutex_lock(&bcm_device_lock); |
8a920568 HG |
372 | |
373 | if (hu->serdev) { | |
374 | serdev_device_close(hu->serdev); | |
375 | bdev = serdev_device_get_drvdata(hu->serdev); | |
376 | } else if (bcm_device_exists(bcm->dev)) { | |
377 | bdev = bcm->dev; | |
378 | #ifdef CONFIG_PM | |
379 | bdev->hu = NULL; | |
380 | #endif | |
381 | } | |
382 | ||
383 | if (bdev) { | |
6cc4396c | 384 | bcm_gpio_set_power(bdev, false); |
b7a622a2 | 385 | #ifdef CONFIG_PM |
c0d3ce58 HG |
386 | pm_runtime_disable(bdev->dev); |
387 | pm_runtime_set_suspended(bdev->dev); | |
e88ab30d | 388 | |
514a00bf | 389 | if (bdev->irq > 0) { |
c0d3ce58 HG |
390 | devm_free_irq(bdev->dev, bdev->irq, bdev); |
391 | device_init_wakeup(bdev->dev, false); | |
6cc4396c | 392 | } |
118612fb FD |
393 | #endif |
394 | } | |
bb3ea16a | 395 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 396 | |
bdd8818e MH |
397 | skb_queue_purge(&bcm->txq); |
398 | kfree_skb(bcm->rx_skb); | |
399 | kfree(bcm); | |
400 | ||
401 | hu->priv = NULL; | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static int bcm_flush(struct hci_uart *hu) | |
406 | { | |
407 | struct bcm_data *bcm = hu->priv; | |
408 | ||
65ad07c9 | 409 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
410 | |
411 | skb_queue_purge(&bcm->txq); | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | static int bcm_setup(struct hci_uart *hu) | |
417 | { | |
6cc4396c | 418 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
419 | char fw_name[64]; |
420 | const struct firmware *fw; | |
960ef1d7 | 421 | unsigned int speed; |
6be09b48 FD |
422 | int err; |
423 | ||
65ad07c9 | 424 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 425 | |
075e1f5e | 426 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
427 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
428 | ||
6be09b48 FD |
429 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
430 | if (err) | |
431 | return err; | |
432 | ||
433 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
434 | if (err < 0) { | |
65ad07c9 | 435 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
436 | return 0; |
437 | } | |
438 | ||
439 | err = btbcm_patchram(hu->hdev, fw); | |
440 | if (err) { | |
65ad07c9 | 441 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
442 | goto finalize; |
443 | } | |
444 | ||
960ef1d7 FD |
445 | /* Init speed if any */ |
446 | if (hu->init_speed) | |
447 | speed = hu->init_speed; | |
448 | else if (hu->proto->init_speed) | |
449 | speed = hu->proto->init_speed; | |
450 | else | |
451 | speed = 0; | |
452 | ||
453 | if (speed) | |
33cd149e | 454 | host_set_baudrate(hu, speed); |
960ef1d7 FD |
455 | |
456 | /* Operational speed if any */ | |
457 | if (hu->oper_speed) | |
458 | speed = hu->oper_speed; | |
459 | else if (hu->proto->oper_speed) | |
460 | speed = hu->proto->oper_speed; | |
461 | else | |
462 | speed = 0; | |
463 | ||
464 | if (speed) { | |
465 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 466 | if (!err) |
33cd149e | 467 | host_set_baudrate(hu, speed); |
61b2fc2b FD |
468 | } |
469 | ||
6be09b48 FD |
470 | finalize: |
471 | release_firmware(fw); | |
472 | ||
473 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
474 | if (err) |
475 | return err; | |
476 | ||
cdd24a20 | 477 | if (!bcm_request_irq(bcm)) |
6cc4396c | 478 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
479 | |
480 | return err; | |
bdd8818e MH |
481 | } |
482 | ||
94c58132 MH |
483 | #define BCM_RECV_LM_DIAG \ |
484 | .type = BCM_LM_DIAG_PKT, \ | |
485 | .hlen = BCM_LM_DIAG_SIZE, \ | |
486 | .loff = 0, \ | |
487 | .lsize = 0, \ | |
488 | .maxlen = BCM_LM_DIAG_SIZE | |
489 | ||
01d5e44a MH |
490 | #define BCM_RECV_NULL \ |
491 | .type = BCM_NULL_PKT, \ | |
492 | .hlen = BCM_NULL_SIZE, \ | |
493 | .loff = 0, \ | |
494 | .lsize = 0, \ | |
495 | .maxlen = BCM_NULL_SIZE | |
496 | ||
79b8df93 | 497 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
498 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
499 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
500 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
501 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
01d5e44a | 502 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
79b8df93 MH |
503 | }; |
504 | ||
bdd8818e MH |
505 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
506 | { | |
507 | struct bcm_data *bcm = hu->priv; | |
508 | ||
509 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
510 | return -EUNATCH; | |
511 | ||
79b8df93 MH |
512 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
513 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
514 | if (IS_ERR(bcm->rx_skb)) { |
515 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 516 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 517 | bcm->rx_skb = NULL; |
bdd8818e | 518 | return err; |
e88ab30d FD |
519 | } else if (!bcm->rx_skb) { |
520 | /* Delay auto-suspend when receiving completed packet */ | |
521 | mutex_lock(&bcm_device_lock); | |
522 | if (bcm->dev && bcm_device_exists(bcm->dev)) { | |
c0d3ce58 HG |
523 | pm_runtime_get(bcm->dev->dev); |
524 | pm_runtime_mark_last_busy(bcm->dev->dev); | |
525 | pm_runtime_put_autosuspend(bcm->dev->dev); | |
e88ab30d FD |
526 | } |
527 | mutex_unlock(&bcm_device_lock); | |
bdd8818e MH |
528 | } |
529 | ||
530 | return count; | |
531 | } | |
532 | ||
533 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
534 | { | |
535 | struct bcm_data *bcm = hu->priv; | |
536 | ||
65ad07c9 | 537 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
538 | |
539 | /* Prepend skb with frame type */ | |
618e8bc2 | 540 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
541 | skb_queue_tail(&bcm->txq, skb); |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
547 | { | |
548 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
549 | struct sk_buff *skb = NULL; |
550 | struct bcm_device *bdev = NULL; | |
551 | ||
552 | mutex_lock(&bcm_device_lock); | |
553 | ||
554 | if (bcm_device_exists(bcm->dev)) { | |
555 | bdev = bcm->dev; | |
c0d3ce58 | 556 | pm_runtime_get_sync(bdev->dev); |
e88ab30d FD |
557 | /* Shall be resumed here */ |
558 | } | |
559 | ||
560 | skb = skb_dequeue(&bcm->txq); | |
561 | ||
562 | if (bdev) { | |
c0d3ce58 HG |
563 | pm_runtime_mark_last_busy(bdev->dev); |
564 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 565 | } |
bdd8818e | 566 | |
e88ab30d FD |
567 | mutex_unlock(&bcm_device_lock); |
568 | ||
569 | return skb; | |
bdd8818e MH |
570 | } |
571 | ||
b7a622a2 FD |
572 | #ifdef CONFIG_PM |
573 | static int bcm_suspend_device(struct device *dev) | |
118612fb | 574 | { |
78277d73 | 575 | struct bcm_device *bdev = dev_get_drvdata(dev); |
118612fb | 576 | |
b7a622a2 | 577 | bt_dev_dbg(bdev, ""); |
917522aa | 578 | |
b7a622a2 | 579 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
580 | hci_uart_set_flow_control(bdev->hu, true); |
581 | ||
b7a622a2 | 582 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
583 | bdev->is_suspended = true; |
584 | } | |
585 | ||
586 | /* Suspend the device */ | |
c926558a LW |
587 | gpiod_set_value(bdev->device_wakeup, false); |
588 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); | |
589 | mdelay(15); | |
118612fb | 590 | |
b7a622a2 FD |
591 | return 0; |
592 | } | |
593 | ||
594 | static int bcm_resume_device(struct device *dev) | |
595 | { | |
78277d73 | 596 | struct bcm_device *bdev = dev_get_drvdata(dev); |
b7a622a2 FD |
597 | |
598 | bt_dev_dbg(bdev, ""); | |
599 | ||
c926558a LW |
600 | gpiod_set_value(bdev->device_wakeup, true); |
601 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); | |
602 | mdelay(15); | |
b7a622a2 FD |
603 | |
604 | /* When this executes, the device has woken up already */ | |
605 | if (bdev->is_suspended && bdev->hu) { | |
606 | bdev->is_suspended = false; | |
607 | ||
608 | hci_uart_set_flow_control(bdev->hu, false); | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | #endif | |
614 | ||
615 | #ifdef CONFIG_PM_SLEEP | |
8a920568 | 616 | /* suspend callback */ |
b7a622a2 FD |
617 | static int bcm_suspend(struct device *dev) |
618 | { | |
78277d73 | 619 | struct bcm_device *bdev = dev_get_drvdata(dev); |
b7a622a2 FD |
620 | int error; |
621 | ||
622 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
623 | ||
8a920568 HG |
624 | /* |
625 | * When used with a device instantiated as platform_device, bcm_suspend | |
626 | * can be called at any time as long as the platform device is bound, | |
627 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
628 | * and device_wake-up GPIO. |
629 | */ | |
630 | mutex_lock(&bcm_device_lock); | |
631 | ||
632 | if (!bdev->hu) | |
633 | goto unlock; | |
634 | ||
e88ab30d FD |
635 | if (pm_runtime_active(dev)) |
636 | bcm_suspend_device(dev); | |
b7a622a2 | 637 | |
514a00bf | 638 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
639 | error = enable_irq_wake(bdev->irq); |
640 | if (!error) | |
641 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
642 | } | |
643 | ||
917522aa | 644 | unlock: |
bb3ea16a | 645 | mutex_unlock(&bcm_device_lock); |
917522aa | 646 | |
118612fb FD |
647 | return 0; |
648 | } | |
649 | ||
8a920568 | 650 | /* resume callback */ |
118612fb FD |
651 | static int bcm_resume(struct device *dev) |
652 | { | |
78277d73 | 653 | struct bcm_device *bdev = dev_get_drvdata(dev); |
118612fb | 654 | |
65ad07c9 | 655 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 656 | |
8a920568 HG |
657 | /* |
658 | * When used with a device instantiated as platform_device, bcm_resume | |
659 | * can be called at any time as long as platform device is bound, | |
660 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
661 | * and device_wake-up GPIO. |
662 | */ | |
bb3ea16a | 663 | mutex_lock(&bcm_device_lock); |
917522aa FD |
664 | |
665 | if (!bdev->hu) | |
666 | goto unlock; | |
667 | ||
514a00bf | 668 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
669 | disable_irq_wake(bdev->irq); |
670 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
671 | } | |
672 | ||
b7a622a2 | 673 | bcm_resume_device(dev); |
118612fb | 674 | |
917522aa | 675 | unlock: |
bb3ea16a | 676 | mutex_unlock(&bcm_device_lock); |
917522aa | 677 | |
e88ab30d FD |
678 | pm_runtime_disable(dev); |
679 | pm_runtime_set_active(dev); | |
680 | pm_runtime_enable(dev); | |
681 | ||
118612fb FD |
682 | return 0; |
683 | } | |
684 | #endif | |
685 | ||
89ab37b4 DD |
686 | static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; |
687 | static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; | |
688 | static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; | |
689 | ||
690 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
691 | { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, | |
692 | { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, | |
693 | { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, | |
694 | { }, | |
695 | }; | |
696 | ||
697 | static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; | |
698 | static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; | |
699 | static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; | |
700 | ||
701 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { | |
702 | { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, | |
703 | { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, | |
704 | { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, | |
0395ffc1 FD |
705 | { }, |
706 | }; | |
707 | ||
50d78bcf | 708 | #ifdef CONFIG_ACPI |
5cebdfea | 709 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ |
227630cc | 710 | static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = { |
5e2bd93b JB |
711 | { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ |
712 | .ident = "Lenovo ThinkPad 8", | |
713 | .matches = { | |
714 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
715 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), | |
716 | }, | |
5e2bd93b | 717 | }, |
1bdb68b2 IM |
718 | { |
719 | .ident = "MINIX Z83-4", | |
720 | .matches = { | |
721 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MINIX"), | |
722 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), | |
723 | }, | |
724 | }, | |
5cebdfea FD |
725 | { } |
726 | }; | |
727 | ||
ae056908 FD |
728 | static int bcm_resource(struct acpi_resource *ares, void *data) |
729 | { | |
730 | struct bcm_device *dev = data; | |
6cc4396c FD |
731 | struct acpi_resource_extended_irq *irq; |
732 | struct acpi_resource_gpio *gpio; | |
733 | struct acpi_resource_uart_serialbus *sb; | |
734 | ||
735 | switch (ares->type) { | |
736 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
737 | irq = &ares->data.extended_irq; | |
09d86354 HG |
738 | if (irq->polarity != ACPI_ACTIVE_LOW) |
739 | dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); | |
740 | dev->irq_active_low = true; | |
6cc4396c FD |
741 | break; |
742 | ||
743 | case ACPI_RESOURCE_TYPE_GPIO: | |
744 | gpio = &ares->data.gpio; | |
745 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
227630cc | 746 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
6cc4396c FD |
747 | break; |
748 | ||
749 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 | 750 | sb = &ares->data.uart_serial_bus; |
74183a1c | 751 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
ae056908 | 752 | dev->init_speed = sb->default_baud_rate; |
74183a1c MH |
753 | dev->oper_speed = 4000000; |
754 | } | |
6cc4396c FD |
755 | break; |
756 | ||
757 | default: | |
758 | break; | |
ae056908 FD |
759 | } |
760 | ||
9d54fd6a | 761 | return 0; |
ae056908 | 762 | } |
212d7183 | 763 | #endif /* CONFIG_ACPI */ |
ae056908 | 764 | |
42ef18f0 | 765 | static int bcm_get_resources(struct bcm_device *dev) |
0395ffc1 | 766 | { |
c0d3ce58 | 767 | dev->name = dev_name(dev->dev); |
0395ffc1 | 768 | |
c0d3ce58 | 769 | dev->clk = devm_clk_get(dev->dev, NULL); |
89ab37b4 | 770 | |
d76a1513 CYT |
771 | /* Handle deferred probing */ |
772 | if (dev->clk == ERR_PTR(-EPROBE_DEFER)) | |
773 | return PTR_ERR(dev->clk); | |
774 | ||
aee67da6 SW |
775 | dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", |
776 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
777 | if (IS_ERR(dev->device_wakeup)) |
778 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 779 | |
aee67da6 SW |
780 | dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", |
781 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
782 | if (IS_ERR(dev->shutdown)) |
783 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 784 | |
6cc4396c | 785 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
6cc4396c FD |
786 | if (dev->irq <= 0) { |
787 | struct gpio_desc *gpio; | |
788 | ||
c0d3ce58 | 789 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", |
6cc4396c FD |
790 | GPIOD_IN); |
791 | if (IS_ERR(gpio)) | |
792 | return PTR_ERR(gpio); | |
793 | ||
794 | dev->irq = gpiod_to_irq(gpio); | |
795 | } | |
796 | ||
c0d3ce58 | 797 | dev_info(dev->dev, "BCM irq: %d\n", dev->irq); |
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; | |
9d54fd6a | 808 | struct resource_entry *entry; |
212d7183 AS |
809 | int ret; |
810 | ||
811 | /* Retrieve GPIO data */ | |
c0d3ce58 | 812 | id = acpi_match_device(dev->dev->driver->acpi_match_table, dev->dev); |
212d7183 AS |
813 | if (id) |
814 | gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; | |
815 | ||
c0d3ce58 | 816 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); |
212d7183 AS |
817 | if (ret) |
818 | return ret; | |
819 | ||
ae056908 | 820 | /* Retrieve UART ACPI info */ |
c0d3ce58 | 821 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
e98d6d62 | 822 | &resources, bcm_resource, dev); |
5be00284 JN |
823 | if (ret < 0) |
824 | return ret; | |
9d54fd6a HG |
825 | |
826 | resource_list_for_each_entry(entry, &resources) { | |
827 | if (resource_type(entry->res) == IORESOURCE_IRQ) { | |
828 | dev->irq = entry->res->start; | |
829 | break; | |
830 | } | |
831 | } | |
09dbf1b7 | 832 | acpi_dev_free_resource_list(&resources); |
ae056908 | 833 | |
5bffac2b HG |
834 | if (irq_polarity != -1) { |
835 | dev->irq_active_low = irq_polarity; | |
836 | dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", | |
837 | dev->irq_active_low ? "low" : "high"); | |
838 | } else { | |
839 | dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); | |
840 | if (dmi_id) { | |
841 | dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low", | |
842 | dmi_id->ident); | |
843 | dev->irq_active_low = true; | |
844 | } | |
5cebdfea FD |
845 | } |
846 | ||
0395ffc1 FD |
847 | return 0; |
848 | } | |
50d78bcf FD |
849 | #else |
850 | static int bcm_acpi_probe(struct bcm_device *dev) | |
851 | { | |
852 | return -EINVAL; | |
853 | } | |
854 | #endif /* CONFIG_ACPI */ | |
0395ffc1 | 855 | |
8a920568 HG |
856 | static int bcm_of_probe(struct bcm_device *bdev) |
857 | { | |
858 | device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); | |
859 | return 0; | |
860 | } | |
861 | ||
0395ffc1 FD |
862 | static int bcm_probe(struct platform_device *pdev) |
863 | { | |
864 | struct bcm_device *dev; | |
0395ffc1 FD |
865 | int ret; |
866 | ||
867 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
868 | if (!dev) | |
869 | return -ENOMEM; | |
870 | ||
c0d3ce58 | 871 | dev->dev = &pdev->dev; |
4a56f891 | 872 | dev->irq = platform_get_irq(pdev, 0); |
0395ffc1 | 873 | |
201762e2 | 874 | if (has_acpi_companion(&pdev->dev)) { |
212d7183 | 875 | ret = bcm_acpi_probe(dev); |
201762e2 HG |
876 | if (ret) |
877 | return ret; | |
878 | } | |
879 | ||
42ef18f0 | 880 | ret = bcm_get_resources(dev); |
4d1c4558 JN |
881 | if (ret) |
882 | return ret; | |
0395ffc1 FD |
883 | |
884 | platform_set_drvdata(pdev, dev); | |
885 | ||
886 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
887 | ||
888 | /* Place this instance on the device list */ | |
bb3ea16a | 889 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 890 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 891 | mutex_unlock(&bcm_device_lock); |
0395ffc1 FD |
892 | |
893 | bcm_gpio_set_power(dev, false); | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | static int bcm_remove(struct platform_device *pdev) | |
899 | { | |
900 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
901 | ||
bb3ea16a | 902 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 903 | list_del(&dev->list); |
bb3ea16a | 904 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 905 | |
0395ffc1 FD |
906 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
bdd8818e MH |
911 | static const struct hci_uart_proto bcm_proto = { |
912 | .id = HCI_UART_BCM, | |
143f0a28 | 913 | .name = "Broadcom", |
aee61f7a | 914 | .manufacturer = 15, |
61b2fc2b | 915 | .init_speed = 115200, |
bdd8818e MH |
916 | .open = bcm_open, |
917 | .close = bcm_close, | |
918 | .flush = bcm_flush, | |
919 | .setup = bcm_setup, | |
61b2fc2b | 920 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
921 | .recv = bcm_recv, |
922 | .enqueue = bcm_enqueue, | |
923 | .dequeue = bcm_dequeue, | |
924 | }; | |
925 | ||
0395ffc1 FD |
926 | #ifdef CONFIG_ACPI |
927 | static const struct acpi_device_id bcm_acpi_match[] = { | |
89ab37b4 DD |
928 | { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
929 | { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
930 | { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
931 | { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
932 | { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
933 | { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
934 | { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
935 | { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
936 | { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
937 | { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
938 | { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
939 | { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
940 | { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
941 | { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
61d220a6 | 942 | { "BCM2E7E", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
89ab37b4 DD |
943 | { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
944 | { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
1bdb68b2 | 945 | { "BCM2EA4", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
0395ffc1 FD |
946 | { }, |
947 | }; | |
948 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
949 | #endif | |
950 | ||
8a920568 | 951 | /* suspend and resume callbacks */ |
e88ab30d FD |
952 | static const struct dev_pm_ops bcm_pm_ops = { |
953 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
954 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
955 | }; | |
118612fb | 956 | |
0395ffc1 FD |
957 | static struct platform_driver bcm_driver = { |
958 | .probe = bcm_probe, | |
959 | .remove = bcm_remove, | |
960 | .driver = { | |
961 | .name = "hci_bcm", | |
962 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 963 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
964 | }, |
965 | }; | |
966 | ||
33cd149e LP |
967 | static int bcm_serdev_probe(struct serdev_device *serdev) |
968 | { | |
8a920568 | 969 | struct bcm_device *bcmdev; |
33cd149e LP |
970 | int err; |
971 | ||
972 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); | |
973 | if (!bcmdev) | |
974 | return -ENOMEM; | |
975 | ||
8a920568 | 976 | bcmdev->dev = &serdev->dev; |
81a19053 | 977 | #ifdef CONFIG_PM |
8a920568 | 978 | bcmdev->hu = &bcmdev->serdev_hu; |
81a19053 | 979 | #endif |
8a920568 | 980 | bcmdev->serdev_hu.serdev = serdev; |
33cd149e LP |
981 | serdev_device_set_drvdata(serdev, bcmdev); |
982 | ||
8a920568 HG |
983 | if (has_acpi_companion(&serdev->dev)) |
984 | err = bcm_acpi_probe(bcmdev); | |
985 | else | |
986 | err = bcm_of_probe(bcmdev); | |
987 | if (err) | |
988 | return err; | |
33cd149e | 989 | |
8a920568 HG |
990 | err = bcm_get_resources(bcmdev); |
991 | if (err) | |
992 | return err; | |
993 | ||
994 | bcm_gpio_set_power(bcmdev, false); | |
995 | ||
996 | return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); | |
33cd149e LP |
997 | } |
998 | ||
999 | static void bcm_serdev_remove(struct serdev_device *serdev) | |
1000 | { | |
8a920568 | 1001 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
33cd149e | 1002 | |
8a920568 | 1003 | hci_uart_unregister_device(&bcmdev->serdev_hu); |
33cd149e LP |
1004 | } |
1005 | ||
1006 | #ifdef CONFIG_OF | |
1007 | static const struct of_device_id bcm_bluetooth_of_match[] = { | |
1008 | { .compatible = "brcm,bcm43438-bt" }, | |
1009 | { }, | |
1010 | }; | |
1011 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); | |
1012 | #endif | |
1013 | ||
1014 | static struct serdev_device_driver bcm_serdev_driver = { | |
1015 | .probe = bcm_serdev_probe, | |
1016 | .remove = bcm_serdev_remove, | |
1017 | .driver = { | |
1018 | .name = "hci_uart_bcm", | |
1019 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), | |
8a920568 HG |
1020 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1021 | .pm = &bcm_pm_ops, | |
33cd149e LP |
1022 | }, |
1023 | }; | |
1024 | ||
bdd8818e MH |
1025 | int __init bcm_init(void) |
1026 | { | |
33cd149e LP |
1027 | /* For now, we need to keep both platform device |
1028 | * driver (ACPI generated) and serdev driver (DT). | |
1029 | */ | |
0395ffc1 | 1030 | platform_driver_register(&bcm_driver); |
33cd149e | 1031 | serdev_device_driver_register(&bcm_serdev_driver); |
0395ffc1 | 1032 | |
bdd8818e MH |
1033 | return hci_uart_register_proto(&bcm_proto); |
1034 | } | |
1035 | ||
1036 | int __exit bcm_deinit(void) | |
1037 | { | |
0395ffc1 | 1038 | platform_driver_unregister(&bcm_driver); |
33cd149e | 1039 | serdev_device_driver_unregister(&bcm_serdev_driver); |
0395ffc1 | 1040 | |
bdd8818e MH |
1041 | return hci_uart_unregister_proto(&bcm_proto); |
1042 | } |