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> |
27 | #include <linux/firmware.h> |
28 | #include <linux/module.h> |
29 | #include <linux/acpi.h> |
30 | #include <linux/of.h> |
31 | #include <linux/property.h> |
32 | #include <linux/platform_data/x86/apple.h> |
33 | #include <linux/platform_device.h> |
34 | #include <linux/regulator/consumer.h> |
35 | #include <linux/clk.h> |
36 | #include <linux/gpio/consumer.h> |
37 | #include <linux/tty.h> |
38 | #include <linux/interrupt.h> |
39 | #include <linux/dmi.h> |
40 | #include <linux/pm_runtime.h> |
41 | #include <linux/serdev.h> |
42 | |
43 | #include <net/bluetooth/bluetooth.h> |
44 | #include <net/bluetooth/hci_core.h> |
45 | |
46 | #include "btbcm.h" |
47 | #include "hci_uart.h" |
48 | |
49 | #define BCM_NULL_PKT 0x00 |
50 | #define BCM_NULL_SIZE 0 |
51 | |
52 | #define BCM_LM_DIAG_PKT 0x07 |
53 | #define BCM_LM_DIAG_SIZE 63 |
54 | |
55 | #define BCM_TYPE49_PKT 0x31 |
56 | #define BCM_TYPE49_SIZE 0 |
57 | |
58 | #define BCM_TYPE52_PKT 0x34 |
59 | #define BCM_TYPE52_SIZE 0 |
60 | |
61 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
62 | |
63 | #define BCM_NUM_SUPPLIES 2 |
64 | |
65 | /** |
66 | * struct bcm_device - device driver resources |
67 | * @serdev_hu: HCI UART controller struct |
68 | * @list: bcm_device_list node |
69 | * @dev: physical UART slave |
70 | * @name: device name logged by bt_dev_*() functions |
71 | * @device_wakeup: BT_WAKE pin, |
72 | * assert = Bluetooth device must wake up or remain awake, |
73 | * deassert = Bluetooth device may sleep when sleep criteria are met |
74 | * @shutdown: BT_REG_ON pin, |
75 | * power up or power down Bluetooth device internal regulators |
76 | * @set_device_wakeup: callback to toggle BT_WAKE pin |
77 | * either by accessing @device_wakeup or by calling @btlp |
78 | * @set_shutdown: callback to toggle BT_REG_ON pin |
79 | * either by accessing @shutdown or by calling @btpu/@btpd |
80 | * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") |
81 | * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") |
82 | * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") |
83 | * @txco_clk: external reference frequency clock used by Bluetooth device |
84 | * @lpo_clk: external LPO clock used by Bluetooth device |
85 | * @supplies: VBAT and VDDIO supplies used by Bluetooth device |
86 | * @res_enabled: whether clocks and supplies are prepared and enabled |
87 | * @init_speed: default baudrate of Bluetooth device; |
88 | * the host UART is initially set to this baudrate so that |
89 | * it can configure the Bluetooth device for @oper_speed |
90 | * @oper_speed: preferred baudrate of Bluetooth device; |
91 | * set to 0 if @init_speed is already the preferred baudrate |
92 | * @irq: interrupt triggered by HOST_WAKE_BT pin |
93 | * @irq_active_low: whether @irq is active low |
94 | * @hu: pointer to HCI UART controller struct, |
95 | * used to disable flow control during runtime suspend and system sleep |
96 | * @is_suspended: whether flow control is currently disabled |
97 | */ |
98 | struct bcm_device { |
99 | /* Must be the first member, hci_serdev.c expects this. */ |
100 | struct hci_uart serdev_hu; |
101 | struct list_head list; |
102 | |
103 | struct device *dev; |
104 | |
105 | const char *name; |
106 | struct gpio_desc *device_wakeup; |
107 | struct gpio_desc *shutdown; |
108 | int (*set_device_wakeup)(struct bcm_device *, bool); |
109 | int (*set_shutdown)(struct bcm_device *, bool); |
110 | #ifdef CONFIG_ACPI |
111 | acpi_handle btlp, btpu, btpd; |
112 | int gpio_count; |
113 | int gpio_int_idx; |
114 | #endif |
115 | |
116 | struct clk *txco_clk; |
117 | struct clk *lpo_clk; |
118 | struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; |
119 | bool res_enabled; |
120 | |
121 | u32 init_speed; |
122 | u32 oper_speed; |
123 | int irq; |
124 | bool irq_active_low; |
125 | |
126 | #ifdef CONFIG_PM |
127 | struct hci_uart *hu; |
128 | bool is_suspended; |
129 | #endif |
130 | }; |
131 | |
132 | /* generic bcm uart resources */ |
133 | struct bcm_data { |
134 | struct sk_buff *rx_skb; |
135 | struct sk_buff_head txq; |
136 | |
137 | struct bcm_device *dev; |
138 | }; |
139 | |
140 | /* List of BCM BT UART devices */ |
141 | static DEFINE_MUTEX(bcm_device_lock); |
142 | static LIST_HEAD(bcm_device_list); |
143 | |
144 | static int irq_polarity = -1; |
145 | module_param(irq_polarity, int, 0444); |
146 | MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low" ); |
147 | |
148 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
149 | { |
150 | if (hu->serdev) |
151 | serdev_device_set_baudrate(hu->serdev, speed); |
152 | else |
153 | hci_uart_set_baudrate(hu, speed); |
154 | } |
155 | |
156 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
157 | { |
158 | struct hci_dev *hdev = hu->hdev; |
159 | struct sk_buff *skb; |
160 | struct bcm_update_uart_baud_rate param; |
161 | |
162 | if (speed > 3000000) { |
163 | struct bcm_write_uart_clock_setting clock; |
164 | |
165 | clock.type = BCM_UART_CLOCK_48MHZ; |
166 | |
167 | bt_dev_dbg(hdev, "Set Controller clock (%d)" , clock.type); |
168 | |
169 | /* This Broadcom specific command changes the UART's controller |
170 | * clock for baud rate > 3000000. |
171 | */ |
172 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); |
173 | if (IS_ERR(skb)) { |
174 | int err = PTR_ERR(skb); |
175 | bt_dev_err(hdev, "BCM: failed to write clock (%d)" , |
176 | err); |
177 | return err; |
178 | } |
179 | |
180 | kfree_skb(skb); |
181 | } |
182 | |
183 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s" , speed); |
184 | |
185 | param.zero = cpu_to_le16(0); |
186 | param.baud_rate = cpu_to_le32(speed); |
187 | |
188 | /* This Broadcom specific command changes the UART's controller baud |
189 | * rate. |
190 | */ |
191 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, |
192 | HCI_INIT_TIMEOUT); |
193 | if (IS_ERR(skb)) { |
194 | int err = PTR_ERR(skb); |
195 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)" , |
196 | err); |
197 | return err; |
198 | } |
199 | |
200 | kfree_skb(skb); |
201 | |
202 | return 0; |
203 | } |
204 | |
205 | /* bcm_device_exists should be protected by bcm_device_lock */ |
206 | static bool bcm_device_exists(struct bcm_device *device) |
207 | { |
208 | struct list_head *p; |
209 | |
210 | #ifdef CONFIG_PM |
211 | /* Devices using serdev always exist */ |
212 | if (device && device->hu && device->hu->serdev) |
213 | return true; |
214 | #endif |
215 | |
216 | list_for_each(p, &bcm_device_list) { |
217 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
218 | |
219 | if (device == dev) |
220 | return true; |
221 | } |
222 | |
223 | return false; |
224 | } |
225 | |
226 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) |
227 | { |
228 | int err; |
229 | |
230 | if (powered && !dev->res_enabled) { |
231 | err = regulator_bulk_enable(BCM_NUM_SUPPLIES, dev->supplies); |
232 | if (err) |
233 | return err; |
234 | |
235 | /* LPO clock needs to be 32.768 kHz */ |
236 | err = clk_set_rate(dev->lpo_clk, 32768); |
237 | if (err) { |
238 | dev_err(dev->dev, "Could not set LPO clock rate\n" ); |
239 | goto err_regulator_disable; |
240 | } |
241 | |
242 | err = clk_prepare_enable(dev->lpo_clk); |
243 | if (err) |
244 | goto err_regulator_disable; |
245 | |
246 | err = clk_prepare_enable(dev->txco_clk); |
247 | if (err) |
248 | goto err_lpo_clk_disable; |
249 | } |
250 | |
251 | err = dev->set_shutdown(dev, powered); |
252 | if (err) |
253 | goto err_txco_clk_disable; |
254 | |
255 | err = dev->set_device_wakeup(dev, powered); |
256 | if (err) |
257 | goto err_revert_shutdown; |
258 | |
259 | if (!powered && dev->res_enabled) { |
260 | clk_disable_unprepare(dev->txco_clk); |
261 | clk_disable_unprepare(dev->lpo_clk); |
262 | regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); |
263 | } |
264 | |
265 | /* wait for device to power on and come out of reset */ |
266 | usleep_range(10000, 20000); |
267 | |
268 | dev->res_enabled = powered; |
269 | |
270 | return 0; |
271 | |
272 | err_revert_shutdown: |
273 | dev->set_shutdown(dev, !powered); |
274 | err_txco_clk_disable: |
275 | if (powered && !dev->res_enabled) |
276 | clk_disable_unprepare(dev->txco_clk); |
277 | err_lpo_clk_disable: |
278 | if (powered && !dev->res_enabled) |
279 | clk_disable_unprepare(dev->lpo_clk); |
280 | err_regulator_disable: |
281 | if (powered && !dev->res_enabled) |
282 | regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); |
283 | return err; |
284 | } |
285 | |
286 | #ifdef CONFIG_PM |
287 | static irqreturn_t bcm_host_wake(int irq, void *data) |
288 | { |
289 | struct bcm_device *bdev = data; |
290 | |
291 | bt_dev_dbg(bdev, "Host wake IRQ" ); |
292 | |
293 | pm_runtime_get(bdev->dev); |
294 | pm_runtime_mark_last_busy(bdev->dev); |
295 | pm_runtime_put_autosuspend(bdev->dev); |
296 | |
297 | return IRQ_HANDLED; |
298 | } |
299 | |
300 | static int bcm_request_irq(struct bcm_data *bcm) |
301 | { |
302 | struct bcm_device *bdev = bcm->dev; |
303 | int err; |
304 | |
305 | mutex_lock(&bcm_device_lock); |
306 | if (!bcm_device_exists(bdev)) { |
307 | err = -ENODEV; |
308 | goto unlock; |
309 | } |
310 | |
311 | if (bdev->irq <= 0) { |
312 | err = -EOPNOTSUPP; |
313 | goto unlock; |
314 | } |
315 | |
316 | err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
317 | bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
318 | IRQF_TRIGGER_RISING, |
319 | "host_wake" , bdev); |
320 | if (err) { |
321 | bdev->irq = err; |
322 | goto unlock; |
323 | } |
324 | |
325 | device_init_wakeup(bdev->dev, true); |
326 | |
327 | pm_runtime_set_autosuspend_delay(bdev->dev, |
328 | BCM_AUTOSUSPEND_DELAY); |
329 | pm_runtime_use_autosuspend(bdev->dev); |
330 | pm_runtime_set_active(bdev->dev); |
331 | pm_runtime_enable(bdev->dev); |
332 | |
333 | unlock: |
334 | mutex_unlock(&bcm_device_lock); |
335 | |
336 | return err; |
337 | } |
338 | |
339 | static const struct bcm_set_sleep_mode default_sleep_params = { |
340 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ |
341 | .idle_host = 2, /* idle threshold HOST, in 300ms */ |
342 | .idle_dev = 2, /* idle threshold device, in 300ms */ |
343 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ |
344 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ |
345 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ |
346 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
347 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
348 | /* Irrelevant USB flags */ |
349 | .usb_auto_sleep = 0, |
350 | .usb_resume_timeout = 0, |
351 | .break_to_host = 0, |
352 | .pulsed_host_wake = 1, |
353 | }; |
354 | |
355 | static int bcm_setup_sleep(struct hci_uart *hu) |
356 | { |
357 | struct bcm_data *bcm = hu->priv; |
358 | struct sk_buff *skb; |
359 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; |
360 | |
361 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
362 | |
363 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), |
364 | &sleep_params, HCI_INIT_TIMEOUT); |
365 | if (IS_ERR(skb)) { |
366 | int err = PTR_ERR(skb); |
367 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)" , err); |
368 | return err; |
369 | } |
370 | kfree_skb(skb); |
371 | |
372 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded" ); |
373 | |
374 | return 0; |
375 | } |
376 | #else |
377 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } |
378 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } |
379 | #endif |
380 | |
381 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
382 | { |
383 | struct hci_uart *hu = hci_get_drvdata(hdev); |
384 | struct bcm_data *bcm = hu->priv; |
385 | struct sk_buff *skb; |
386 | |
387 | if (!test_bit(HCI_RUNNING, &hdev->flags)) |
388 | return -ENETDOWN; |
389 | |
390 | skb = bt_skb_alloc(3, GFP_KERNEL); |
391 | if (!skb) |
392 | return -ENOMEM; |
393 | |
394 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
395 | skb_put_u8(skb, 0xf0); |
396 | skb_put_u8(skb, enable); |
397 | |
398 | skb_queue_tail(&bcm->txq, skb); |
399 | hci_uart_tx_wakeup(hu); |
400 | |
401 | return 0; |
402 | } |
403 | |
404 | static int bcm_open(struct hci_uart *hu) |
405 | { |
406 | struct bcm_data *bcm; |
407 | struct list_head *p; |
408 | int err; |
409 | |
410 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
411 | |
412 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); |
413 | if (!bcm) |
414 | return -ENOMEM; |
415 | |
416 | skb_queue_head_init(&bcm->txq); |
417 | |
418 | hu->priv = bcm; |
419 | |
420 | mutex_lock(&bcm_device_lock); |
421 | |
422 | if (hu->serdev) { |
423 | bcm->dev = serdev_device_get_drvdata(hu->serdev); |
424 | goto out; |
425 | } |
426 | |
427 | if (!hu->tty->dev) |
428 | goto out; |
429 | |
430 | list_for_each(p, &bcm_device_list) { |
431 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
432 | |
433 | /* Retrieve saved bcm_device based on parent of the |
434 | * platform device (saved during device probe) and |
435 | * parent of tty device used by hci_uart |
436 | */ |
437 | if (hu->tty->dev->parent == dev->dev->parent) { |
438 | bcm->dev = dev; |
439 | #ifdef CONFIG_PM |
440 | dev->hu = hu; |
441 | #endif |
442 | break; |
443 | } |
444 | } |
445 | |
446 | out: |
447 | if (bcm->dev) { |
448 | hu->init_speed = bcm->dev->init_speed; |
449 | hu->oper_speed = bcm->dev->oper_speed; |
450 | err = bcm_gpio_set_power(bcm->dev, true); |
451 | if (err) |
452 | goto err_unset_hu; |
453 | } |
454 | |
455 | mutex_unlock(&bcm_device_lock); |
456 | return 0; |
457 | |
458 | err_unset_hu: |
459 | #ifdef CONFIG_PM |
460 | if (!hu->serdev) |
461 | bcm->dev->hu = NULL; |
462 | #endif |
463 | mutex_unlock(&bcm_device_lock); |
464 | hu->priv = NULL; |
465 | kfree(bcm); |
466 | return err; |
467 | } |
468 | |
469 | static int bcm_close(struct hci_uart *hu) |
470 | { |
471 | struct bcm_data *bcm = hu->priv; |
472 | struct bcm_device *bdev = NULL; |
473 | int err; |
474 | |
475 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
476 | |
477 | /* Protect bcm->dev against removal of the device or driver */ |
478 | mutex_lock(&bcm_device_lock); |
479 | |
480 | if (hu->serdev) { |
481 | bdev = serdev_device_get_drvdata(hu->serdev); |
482 | } else if (bcm_device_exists(bcm->dev)) { |
483 | bdev = bcm->dev; |
484 | #ifdef CONFIG_PM |
485 | bdev->hu = NULL; |
486 | #endif |
487 | } |
488 | |
489 | if (bdev) { |
490 | if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { |
491 | devm_free_irq(bdev->dev, bdev->irq, bdev); |
492 | device_init_wakeup(bdev->dev, false); |
493 | pm_runtime_disable(bdev->dev); |
494 | } |
495 | |
496 | err = bcm_gpio_set_power(bdev, false); |
497 | if (err) |
498 | bt_dev_err(hu->hdev, "Failed to power down" ); |
499 | else |
500 | pm_runtime_set_suspended(bdev->dev); |
501 | } |
502 | mutex_unlock(&bcm_device_lock); |
503 | |
504 | skb_queue_purge(&bcm->txq); |
505 | kfree_skb(bcm->rx_skb); |
506 | kfree(bcm); |
507 | |
508 | hu->priv = NULL; |
509 | return 0; |
510 | } |
511 | |
512 | static int bcm_flush(struct hci_uart *hu) |
513 | { |
514 | struct bcm_data *bcm = hu->priv; |
515 | |
516 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
517 | |
518 | skb_queue_purge(&bcm->txq); |
519 | |
520 | return 0; |
521 | } |
522 | |
523 | static int bcm_setup(struct hci_uart *hu) |
524 | { |
525 | struct bcm_data *bcm = hu->priv; |
526 | char fw_name[64]; |
527 | const struct firmware *fw; |
528 | unsigned int speed; |
529 | int err; |
530 | |
531 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
532 | |
533 | hu->hdev->set_diag = bcm_set_diag; |
534 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
535 | |
536 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false); |
537 | if (err) |
538 | return err; |
539 | |
540 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); |
541 | if (err < 0) { |
542 | bt_dev_info(hu->hdev, "BCM: Patch %s not found" , fw_name); |
543 | return 0; |
544 | } |
545 | |
546 | err = btbcm_patchram(hu->hdev, fw); |
547 | if (err) { |
548 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)" , err); |
549 | goto finalize; |
550 | } |
551 | |
552 | /* Init speed if any */ |
553 | if (hu->init_speed) |
554 | speed = hu->init_speed; |
555 | else if (hu->proto->init_speed) |
556 | speed = hu->proto->init_speed; |
557 | else |
558 | speed = 0; |
559 | |
560 | if (speed) |
561 | host_set_baudrate(hu, speed); |
562 | |
563 | /* Operational speed if any */ |
564 | if (hu->oper_speed) |
565 | speed = hu->oper_speed; |
566 | else if (hu->proto->oper_speed) |
567 | speed = hu->proto->oper_speed; |
568 | else |
569 | speed = 0; |
570 | |
571 | if (speed) { |
572 | err = bcm_set_baudrate(hu, speed); |
573 | if (!err) |
574 | host_set_baudrate(hu, speed); |
575 | } |
576 | |
577 | finalize: |
578 | release_firmware(fw); |
579 | |
580 | err = btbcm_finalize(hu->hdev); |
581 | if (err) |
582 | return err; |
583 | |
584 | if (!bcm_request_irq(bcm)) |
585 | err = bcm_setup_sleep(hu); |
586 | |
587 | return err; |
588 | } |
589 | |
590 | #define BCM_RECV_LM_DIAG \ |
591 | .type = BCM_LM_DIAG_PKT, \ |
592 | .hlen = BCM_LM_DIAG_SIZE, \ |
593 | .loff = 0, \ |
594 | .lsize = 0, \ |
595 | .maxlen = BCM_LM_DIAG_SIZE |
596 | |
597 | #define BCM_RECV_NULL \ |
598 | .type = BCM_NULL_PKT, \ |
599 | .hlen = BCM_NULL_SIZE, \ |
600 | .loff = 0, \ |
601 | .lsize = 0, \ |
602 | .maxlen = BCM_NULL_SIZE |
603 | |
604 | #define BCM_RECV_TYPE49 \ |
605 | .type = BCM_TYPE49_PKT, \ |
606 | .hlen = BCM_TYPE49_SIZE, \ |
607 | .loff = 0, \ |
608 | .lsize = 0, \ |
609 | .maxlen = BCM_TYPE49_SIZE |
610 | |
611 | #define BCM_RECV_TYPE52 \ |
612 | .type = BCM_TYPE52_PKT, \ |
613 | .hlen = BCM_TYPE52_SIZE, \ |
614 | .loff = 0, \ |
615 | .lsize = 0, \ |
616 | .maxlen = BCM_TYPE52_SIZE |
617 | |
618 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
619 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
620 | { H4_RECV_SCO, .recv = hci_recv_frame }, |
621 | { H4_RECV_EVENT, .recv = hci_recv_frame }, |
622 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, |
623 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
624 | { BCM_RECV_TYPE49, .recv = hci_recv_diag }, |
625 | { BCM_RECV_TYPE52, .recv = hci_recv_diag }, |
626 | }; |
627 | |
628 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
629 | { |
630 | struct bcm_data *bcm = hu->priv; |
631 | |
632 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
633 | return -EUNATCH; |
634 | |
635 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
636 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); |
637 | if (IS_ERR(bcm->rx_skb)) { |
638 | int err = PTR_ERR(bcm->rx_skb); |
639 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)" , err); |
640 | bcm->rx_skb = NULL; |
641 | return err; |
642 | } else if (!bcm->rx_skb) { |
643 | /* Delay auto-suspend when receiving completed packet */ |
644 | mutex_lock(&bcm_device_lock); |
645 | if (bcm->dev && bcm_device_exists(bcm->dev)) { |
646 | pm_runtime_get(bcm->dev->dev); |
647 | pm_runtime_mark_last_busy(bcm->dev->dev); |
648 | pm_runtime_put_autosuspend(bcm->dev->dev); |
649 | } |
650 | mutex_unlock(&bcm_device_lock); |
651 | } |
652 | |
653 | return count; |
654 | } |
655 | |
656 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
657 | { |
658 | struct bcm_data *bcm = hu->priv; |
659 | |
660 | bt_dev_dbg(hu->hdev, "hu %p skb %p" , hu, skb); |
661 | |
662 | /* Prepend skb with frame type */ |
663 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
664 | skb_queue_tail(&bcm->txq, skb); |
665 | |
666 | return 0; |
667 | } |
668 | |
669 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) |
670 | { |
671 | struct bcm_data *bcm = hu->priv; |
672 | struct sk_buff *skb = NULL; |
673 | struct bcm_device *bdev = NULL; |
674 | |
675 | mutex_lock(&bcm_device_lock); |
676 | |
677 | if (bcm_device_exists(bcm->dev)) { |
678 | bdev = bcm->dev; |
679 | pm_runtime_get_sync(bdev->dev); |
680 | /* Shall be resumed here */ |
681 | } |
682 | |
683 | skb = skb_dequeue(&bcm->txq); |
684 | |
685 | if (bdev) { |
686 | pm_runtime_mark_last_busy(bdev->dev); |
687 | pm_runtime_put_autosuspend(bdev->dev); |
688 | } |
689 | |
690 | mutex_unlock(&bcm_device_lock); |
691 | |
692 | return skb; |
693 | } |
694 | |
695 | #ifdef CONFIG_PM |
696 | static int bcm_suspend_device(struct device *dev) |
697 | { |
698 | struct bcm_device *bdev = dev_get_drvdata(dev); |
699 | int err; |
700 | |
701 | bt_dev_dbg(bdev, "" ); |
702 | |
703 | if (!bdev->is_suspended && bdev->hu) { |
704 | hci_uart_set_flow_control(bdev->hu, true); |
705 | |
706 | /* Once this returns, driver suspends BT via GPIO */ |
707 | bdev->is_suspended = true; |
708 | } |
709 | |
710 | /* Suspend the device */ |
711 | err = bdev->set_device_wakeup(bdev, false); |
712 | if (err) { |
713 | if (bdev->is_suspended && bdev->hu) { |
714 | bdev->is_suspended = false; |
715 | hci_uart_set_flow_control(bdev->hu, false); |
716 | } |
717 | return -EBUSY; |
718 | } |
719 | |
720 | bt_dev_dbg(bdev, "suspend, delaying 15 ms" ); |
721 | msleep(15); |
722 | |
723 | return 0; |
724 | } |
725 | |
726 | static int bcm_resume_device(struct device *dev) |
727 | { |
728 | struct bcm_device *bdev = dev_get_drvdata(dev); |
729 | int err; |
730 | |
731 | bt_dev_dbg(bdev, "" ); |
732 | |
733 | err = bdev->set_device_wakeup(bdev, true); |
734 | if (err) { |
735 | dev_err(dev, "Failed to power up\n" ); |
736 | return err; |
737 | } |
738 | |
739 | bt_dev_dbg(bdev, "resume, delaying 15 ms" ); |
740 | msleep(15); |
741 | |
742 | /* When this executes, the device has woken up already */ |
743 | if (bdev->is_suspended && bdev->hu) { |
744 | bdev->is_suspended = false; |
745 | |
746 | hci_uart_set_flow_control(bdev->hu, false); |
747 | } |
748 | |
749 | return 0; |
750 | } |
751 | #endif |
752 | |
753 | #ifdef CONFIG_PM_SLEEP |
754 | /* suspend callback */ |
755 | static int bcm_suspend(struct device *dev) |
756 | { |
757 | struct bcm_device *bdev = dev_get_drvdata(dev); |
758 | int error; |
759 | |
760 | bt_dev_dbg(bdev, "suspend: is_suspended %d" , bdev->is_suspended); |
761 | |
762 | /* |
763 | * When used with a device instantiated as platform_device, bcm_suspend |
764 | * can be called at any time as long as the platform device is bound, |
765 | * so it should use bcm_device_lock to protect access to hci_uart |
766 | * and device_wake-up GPIO. |
767 | */ |
768 | mutex_lock(&bcm_device_lock); |
769 | |
770 | if (!bdev->hu) |
771 | goto unlock; |
772 | |
773 | if (pm_runtime_active(dev)) |
774 | bcm_suspend_device(dev); |
775 | |
776 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
777 | error = enable_irq_wake(bdev->irq); |
778 | if (!error) |
779 | bt_dev_dbg(bdev, "BCM irq: enabled" ); |
780 | } |
781 | |
782 | unlock: |
783 | mutex_unlock(&bcm_device_lock); |
784 | |
785 | return 0; |
786 | } |
787 | |
788 | /* resume callback */ |
789 | static int bcm_resume(struct device *dev) |
790 | { |
791 | struct bcm_device *bdev = dev_get_drvdata(dev); |
792 | int err = 0; |
793 | |
794 | bt_dev_dbg(bdev, "resume: is_suspended %d" , bdev->is_suspended); |
795 | |
796 | /* |
797 | * When used with a device instantiated as platform_device, bcm_resume |
798 | * can be called at any time as long as platform device is bound, |
799 | * so it should use bcm_device_lock to protect access to hci_uart |
800 | * and device_wake-up GPIO. |
801 | */ |
802 | mutex_lock(&bcm_device_lock); |
803 | |
804 | if (!bdev->hu) |
805 | goto unlock; |
806 | |
807 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
808 | disable_irq_wake(bdev->irq); |
809 | bt_dev_dbg(bdev, "BCM irq: disabled" ); |
810 | } |
811 | |
812 | err = bcm_resume_device(dev); |
813 | |
814 | unlock: |
815 | mutex_unlock(&bcm_device_lock); |
816 | |
817 | if (!err) { |
818 | pm_runtime_disable(dev); |
819 | pm_runtime_set_active(dev); |
820 | pm_runtime_enable(dev); |
821 | } |
822 | |
823 | return 0; |
824 | } |
825 | #endif |
826 | |
827 | static const struct acpi_gpio_params first_gpio = { 0, 0, false }; |
828 | static const struct acpi_gpio_params second_gpio = { 1, 0, false }; |
829 | static const struct acpi_gpio_params third_gpio = { 2, 0, false }; |
830 | |
831 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { |
832 | { "device-wakeup-gpios" , &first_gpio, 1 }, |
833 | { "shutdown-gpios" , &second_gpio, 1 }, |
834 | { "host-wakeup-gpios" , &third_gpio, 1 }, |
835 | { }, |
836 | }; |
837 | |
838 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { |
839 | { "host-wakeup-gpios" , &first_gpio, 1 }, |
840 | { "device-wakeup-gpios" , &second_gpio, 1 }, |
841 | { "shutdown-gpios" , &third_gpio, 1 }, |
842 | { }, |
843 | }; |
844 | |
845 | /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ |
846 | static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { |
847 | { |
848 | .ident = "Meegopad T08" , |
849 | .matches = { |
850 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, |
851 | "To be filled by OEM." ), |
852 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD" ), |
853 | DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1" ), |
854 | }, |
855 | }, |
856 | { } |
857 | }; |
858 | |
859 | #ifdef CONFIG_ACPI |
860 | static int bcm_resource(struct acpi_resource *ares, void *data) |
861 | { |
862 | struct bcm_device *dev = data; |
863 | struct acpi_resource_extended_irq *irq; |
864 | struct acpi_resource_gpio *gpio; |
865 | struct acpi_resource_uart_serialbus *sb; |
866 | |
867 | switch (ares->type) { |
868 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
869 | irq = &ares->data.extended_irq; |
870 | if (irq->polarity != ACPI_ACTIVE_LOW) |
871 | dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n" ); |
872 | dev->irq_active_low = true; |
873 | break; |
874 | |
875 | case ACPI_RESOURCE_TYPE_GPIO: |
876 | gpio = &ares->data.gpio; |
877 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { |
878 | dev->gpio_int_idx = dev->gpio_count; |
879 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
880 | } |
881 | dev->gpio_count++; |
882 | break; |
883 | |
884 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: |
885 | sb = &ares->data.uart_serial_bus; |
886 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
887 | dev->init_speed = sb->default_baud_rate; |
888 | dev->oper_speed = 4000000; |
889 | } |
890 | break; |
891 | |
892 | default: |
893 | break; |
894 | } |
895 | |
896 | return 0; |
897 | } |
898 | |
899 | static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) |
900 | { |
901 | if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) |
902 | return -EIO; |
903 | |
904 | return 0; |
905 | } |
906 | |
907 | static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) |
908 | { |
909 | if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, |
910 | NULL, NULL, NULL))) |
911 | return -EIO; |
912 | |
913 | return 0; |
914 | } |
915 | |
916 | static int bcm_apple_get_resources(struct bcm_device *dev) |
917 | { |
918 | struct acpi_device *adev = ACPI_COMPANION(dev->dev); |
919 | const union acpi_object *obj; |
920 | |
921 | if (!adev || |
922 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP" , &dev->btlp)) || |
923 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU" , &dev->btpu)) || |
924 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD" , &dev->btpd))) |
925 | return -ENODEV; |
926 | |
927 | if (!acpi_dev_get_property(adev, "baud" , ACPI_TYPE_BUFFER, &obj) && |
928 | obj->buffer.length == 8) |
929 | dev->init_speed = *(u64 *)obj->buffer.pointer; |
930 | |
931 | dev->set_device_wakeup = bcm_apple_set_device_wakeup; |
932 | dev->set_shutdown = bcm_apple_set_shutdown; |
933 | |
934 | return 0; |
935 | } |
936 | #else |
937 | static inline int bcm_apple_get_resources(struct bcm_device *dev) |
938 | { |
939 | return -EOPNOTSUPP; |
940 | } |
941 | #endif /* CONFIG_ACPI */ |
942 | |
943 | static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
944 | { |
945 | gpiod_set_value_cansleep(dev->device_wakeup, awake); |
946 | return 0; |
947 | } |
948 | |
949 | static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) |
950 | { |
951 | gpiod_set_value_cansleep(dev->shutdown, powered); |
952 | return 0; |
953 | } |
954 | |
955 | /* Try a bunch of names for TXCO */ |
956 | static struct clk *bcm_get_txco(struct device *dev) |
957 | { |
958 | struct clk *clk; |
959 | |
960 | /* New explicit name */ |
961 | clk = devm_clk_get(dev, "txco" ); |
962 | if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) |
963 | return clk; |
964 | |
965 | /* Deprecated name */ |
966 | clk = devm_clk_get(dev, "extclk" ); |
967 | if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) |
968 | return clk; |
969 | |
970 | /* Original code used no name at all */ |
971 | return devm_clk_get(dev, NULL); |
972 | } |
973 | |
974 | static int bcm_get_resources(struct bcm_device *dev) |
975 | { |
976 | const struct dmi_system_id *dmi_id; |
977 | int err; |
978 | |
979 | dev->name = dev_name(dev->dev); |
980 | |
981 | if (x86_apple_machine && !bcm_apple_get_resources(dev)) |
982 | return 0; |
983 | |
984 | dev->txco_clk = bcm_get_txco(dev->dev); |
985 | |
986 | /* Handle deferred probing */ |
987 | if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) |
988 | return PTR_ERR(dev->txco_clk); |
989 | |
990 | /* Ignore all other errors as before */ |
991 | if (IS_ERR(dev->txco_clk)) |
992 | dev->txco_clk = NULL; |
993 | |
994 | dev->lpo_clk = devm_clk_get(dev->dev, "lpo" ); |
995 | if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) |
996 | return PTR_ERR(dev->lpo_clk); |
997 | |
998 | if (IS_ERR(dev->lpo_clk)) |
999 | dev->lpo_clk = NULL; |
1000 | |
1001 | /* Check if we accidentally fetched the lpo clock twice */ |
1002 | if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { |
1003 | devm_clk_put(dev->dev, dev->txco_clk); |
1004 | dev->txco_clk = NULL; |
1005 | } |
1006 | |
1007 | dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup" , |
1008 | GPIOD_OUT_LOW); |
1009 | if (IS_ERR(dev->device_wakeup)) |
1010 | return PTR_ERR(dev->device_wakeup); |
1011 | |
1012 | dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown" , |
1013 | GPIOD_OUT_LOW); |
1014 | if (IS_ERR(dev->shutdown)) |
1015 | return PTR_ERR(dev->shutdown); |
1016 | |
1017 | dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
1018 | dev->set_shutdown = bcm_gpio_set_shutdown; |
1019 | |
1020 | dev->supplies[0].supply = "vbat" ; |
1021 | dev->supplies[1].supply = "vddio" ; |
1022 | err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, |
1023 | dev->supplies); |
1024 | if (err) |
1025 | return err; |
1026 | |
1027 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
1028 | if (dev->irq <= 0) { |
1029 | struct gpio_desc *gpio; |
1030 | |
1031 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup" , |
1032 | GPIOD_IN); |
1033 | if (IS_ERR(gpio)) |
1034 | return PTR_ERR(gpio); |
1035 | |
1036 | dev->irq = gpiod_to_irq(gpio); |
1037 | } |
1038 | |
1039 | dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); |
1040 | if (dmi_id) { |
1041 | dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n" , |
1042 | dmi_id->ident); |
1043 | dev->irq = 0; |
1044 | } |
1045 | |
1046 | dev_dbg(dev->dev, "BCM irq: %d\n" , dev->irq); |
1047 | return 0; |
1048 | } |
1049 | |
1050 | #ifdef CONFIG_ACPI |
1051 | static int bcm_acpi_probe(struct bcm_device *dev) |
1052 | { |
1053 | LIST_HEAD(resources); |
1054 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; |
1055 | struct resource_entry *entry; |
1056 | int ret; |
1057 | |
1058 | /* Retrieve UART ACPI info */ |
1059 | dev->gpio_int_idx = -1; |
1060 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
1061 | &resources, bcm_resource, dev); |
1062 | if (ret < 0) |
1063 | return ret; |
1064 | |
1065 | resource_list_for_each_entry(entry, &resources) { |
1066 | if (resource_type(entry->res) == IORESOURCE_IRQ) { |
1067 | dev->irq = entry->res->start; |
1068 | break; |
1069 | } |
1070 | } |
1071 | acpi_dev_free_resource_list(&resources); |
1072 | |
1073 | /* If the DSDT uses an Interrupt resource for the IRQ, then there are |
1074 | * only 2 GPIO resources, we use the irq-last mapping for this, since |
1075 | * we already have an irq the 3th / last mapping will not be used. |
1076 | */ |
1077 | if (dev->irq) |
1078 | gpio_mapping = acpi_bcm_int_last_gpios; |
1079 | else if (dev->gpio_int_idx == 0) |
1080 | gpio_mapping = acpi_bcm_int_first_gpios; |
1081 | else if (dev->gpio_int_idx == 2) |
1082 | gpio_mapping = acpi_bcm_int_last_gpios; |
1083 | else |
1084 | dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n" , |
1085 | dev->gpio_int_idx); |
1086 | |
1087 | /* Warn if our expectations are not met. */ |
1088 | if (dev->gpio_count != (dev->irq ? 2 : 3)) |
1089 | dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n" , |
1090 | dev->gpio_count); |
1091 | |
1092 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); |
1093 | if (ret) |
1094 | return ret; |
1095 | |
1096 | if (irq_polarity != -1) { |
1097 | dev->irq_active_low = irq_polarity; |
1098 | dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n" , |
1099 | dev->irq_active_low ? "low" : "high" ); |
1100 | } |
1101 | |
1102 | return 0; |
1103 | } |
1104 | #else |
1105 | static int bcm_acpi_probe(struct bcm_device *dev) |
1106 | { |
1107 | return -EINVAL; |
1108 | } |
1109 | #endif /* CONFIG_ACPI */ |
1110 | |
1111 | static int bcm_of_probe(struct bcm_device *bdev) |
1112 | { |
1113 | device_property_read_u32(bdev->dev, "max-speed" , &bdev->oper_speed); |
1114 | return 0; |
1115 | } |
1116 | |
1117 | static int bcm_probe(struct platform_device *pdev) |
1118 | { |
1119 | struct bcm_device *dev; |
1120 | int ret; |
1121 | |
1122 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); |
1123 | if (!dev) |
1124 | return -ENOMEM; |
1125 | |
1126 | dev->dev = &pdev->dev; |
1127 | dev->irq = platform_get_irq(pdev, 0); |
1128 | |
1129 | if (has_acpi_companion(&pdev->dev)) { |
1130 | ret = bcm_acpi_probe(dev); |
1131 | if (ret) |
1132 | return ret; |
1133 | } |
1134 | |
1135 | ret = bcm_get_resources(dev); |
1136 | if (ret) |
1137 | return ret; |
1138 | |
1139 | platform_set_drvdata(pdev, dev); |
1140 | |
1141 | dev_info(&pdev->dev, "%s device registered.\n" , dev->name); |
1142 | |
1143 | /* Place this instance on the device list */ |
1144 | mutex_lock(&bcm_device_lock); |
1145 | list_add_tail(&dev->list, &bcm_device_list); |
1146 | mutex_unlock(&bcm_device_lock); |
1147 | |
1148 | ret = bcm_gpio_set_power(dev, false); |
1149 | if (ret) |
1150 | dev_err(&pdev->dev, "Failed to power down\n" ); |
1151 | |
1152 | return 0; |
1153 | } |
1154 | |
1155 | static int bcm_remove(struct platform_device *pdev) |
1156 | { |
1157 | struct bcm_device *dev = platform_get_drvdata(pdev); |
1158 | |
1159 | mutex_lock(&bcm_device_lock); |
1160 | list_del(&dev->list); |
1161 | mutex_unlock(&bcm_device_lock); |
1162 | |
1163 | dev_info(&pdev->dev, "%s device unregistered.\n" , dev->name); |
1164 | |
1165 | return 0; |
1166 | } |
1167 | |
1168 | static const struct hci_uart_proto bcm_proto = { |
1169 | .id = HCI_UART_BCM, |
1170 | .name = "Broadcom" , |
1171 | .manufacturer = 15, |
1172 | .init_speed = 115200, |
1173 | .open = bcm_open, |
1174 | .close = bcm_close, |
1175 | .flush = bcm_flush, |
1176 | .setup = bcm_setup, |
1177 | .set_baudrate = bcm_set_baudrate, |
1178 | .recv = bcm_recv, |
1179 | .enqueue = bcm_enqueue, |
1180 | .dequeue = bcm_dequeue, |
1181 | }; |
1182 | |
1183 | #ifdef CONFIG_ACPI |
1184 | static const struct acpi_device_id bcm_acpi_match[] = { |
1185 | { "BCM2E00" }, |
1186 | { "BCM2E01" }, |
1187 | { "BCM2E02" }, |
1188 | { "BCM2E03" }, |
1189 | { "BCM2E04" }, |
1190 | { "BCM2E05" }, |
1191 | { "BCM2E06" }, |
1192 | { "BCM2E07" }, |
1193 | { "BCM2E08" }, |
1194 | { "BCM2E09" }, |
1195 | { "BCM2E0A" }, |
1196 | { "BCM2E0B" }, |
1197 | { "BCM2E0C" }, |
1198 | { "BCM2E0D" }, |
1199 | { "BCM2E0E" }, |
1200 | { "BCM2E0F" }, |
1201 | { "BCM2E10" }, |
1202 | { "BCM2E11" }, |
1203 | { "BCM2E12" }, |
1204 | { "BCM2E13" }, |
1205 | { "BCM2E14" }, |
1206 | { "BCM2E15" }, |
1207 | { "BCM2E16" }, |
1208 | { "BCM2E17" }, |
1209 | { "BCM2E18" }, |
1210 | { "BCM2E19" }, |
1211 | { "BCM2E1A" }, |
1212 | { "BCM2E1B" }, |
1213 | { "BCM2E1C" }, |
1214 | { "BCM2E1D" }, |
1215 | { "BCM2E1F" }, |
1216 | { "BCM2E20" }, |
1217 | { "BCM2E21" }, |
1218 | { "BCM2E22" }, |
1219 | { "BCM2E23" }, |
1220 | { "BCM2E24" }, |
1221 | { "BCM2E25" }, |
1222 | { "BCM2E26" }, |
1223 | { "BCM2E27" }, |
1224 | { "BCM2E28" }, |
1225 | { "BCM2E29" }, |
1226 | { "BCM2E2A" }, |
1227 | { "BCM2E2B" }, |
1228 | { "BCM2E2C" }, |
1229 | { "BCM2E2D" }, |
1230 | { "BCM2E2E" }, |
1231 | { "BCM2E2F" }, |
1232 | { "BCM2E30" }, |
1233 | { "BCM2E31" }, |
1234 | { "BCM2E32" }, |
1235 | { "BCM2E33" }, |
1236 | { "BCM2E34" }, |
1237 | { "BCM2E35" }, |
1238 | { "BCM2E36" }, |
1239 | { "BCM2E37" }, |
1240 | { "BCM2E38" }, |
1241 | { "BCM2E39" }, |
1242 | { "BCM2E3A" }, |
1243 | { "BCM2E3B" }, |
1244 | { "BCM2E3C" }, |
1245 | { "BCM2E3D" }, |
1246 | { "BCM2E3E" }, |
1247 | { "BCM2E3F" }, |
1248 | { "BCM2E40" }, |
1249 | { "BCM2E41" }, |
1250 | { "BCM2E42" }, |
1251 | { "BCM2E43" }, |
1252 | { "BCM2E44" }, |
1253 | { "BCM2E45" }, |
1254 | { "BCM2E46" }, |
1255 | { "BCM2E47" }, |
1256 | { "BCM2E48" }, |
1257 | { "BCM2E49" }, |
1258 | { "BCM2E4A" }, |
1259 | { "BCM2E4B" }, |
1260 | { "BCM2E4C" }, |
1261 | { "BCM2E4D" }, |
1262 | { "BCM2E4E" }, |
1263 | { "BCM2E4F" }, |
1264 | { "BCM2E50" }, |
1265 | { "BCM2E51" }, |
1266 | { "BCM2E52" }, |
1267 | { "BCM2E53" }, |
1268 | { "BCM2E54" }, |
1269 | { "BCM2E55" }, |
1270 | { "BCM2E56" }, |
1271 | { "BCM2E57" }, |
1272 | { "BCM2E58" }, |
1273 | { "BCM2E59" }, |
1274 | { "BCM2E5A" }, |
1275 | { "BCM2E5B" }, |
1276 | { "BCM2E5C" }, |
1277 | { "BCM2E5D" }, |
1278 | { "BCM2E5E" }, |
1279 | { "BCM2E5F" }, |
1280 | { "BCM2E60" }, |
1281 | { "BCM2E61" }, |
1282 | { "BCM2E62" }, |
1283 | { "BCM2E63" }, |
1284 | { "BCM2E64" }, |
1285 | { "BCM2E65" }, |
1286 | { "BCM2E66" }, |
1287 | { "BCM2E67" }, |
1288 | { "BCM2E68" }, |
1289 | { "BCM2E69" }, |
1290 | { "BCM2E6B" }, |
1291 | { "BCM2E6D" }, |
1292 | { "BCM2E6E" }, |
1293 | { "BCM2E6F" }, |
1294 | { "BCM2E70" }, |
1295 | { "BCM2E71" }, |
1296 | { "BCM2E72" }, |
1297 | { "BCM2E73" }, |
1298 | { "BCM2E74" }, |
1299 | { "BCM2E75" }, |
1300 | { "BCM2E76" }, |
1301 | { "BCM2E77" }, |
1302 | { "BCM2E78" }, |
1303 | { "BCM2E79" }, |
1304 | { "BCM2E7A" }, |
1305 | { "BCM2E7B" }, |
1306 | { "BCM2E7C" }, |
1307 | { "BCM2E7D" }, |
1308 | { "BCM2E7E" }, |
1309 | { "BCM2E7F" }, |
1310 | { "BCM2E80" }, |
1311 | { "BCM2E81" }, |
1312 | { "BCM2E82" }, |
1313 | { "BCM2E83" }, |
1314 | { "BCM2E84" }, |
1315 | { "BCM2E85" }, |
1316 | { "BCM2E86" }, |
1317 | { "BCM2E87" }, |
1318 | { "BCM2E88" }, |
1319 | { "BCM2E89" }, |
1320 | { "BCM2E8A" }, |
1321 | { "BCM2E8B" }, |
1322 | { "BCM2E8C" }, |
1323 | { "BCM2E8D" }, |
1324 | { "BCM2E8E" }, |
1325 | { "BCM2E90" }, |
1326 | { "BCM2E92" }, |
1327 | { "BCM2E93" }, |
1328 | { "BCM2E94" }, |
1329 | { "BCM2E95" }, |
1330 | { "BCM2E96" }, |
1331 | { "BCM2E97" }, |
1332 | { "BCM2E98" }, |
1333 | { "BCM2E99" }, |
1334 | { "BCM2E9A" }, |
1335 | { "BCM2E9B" }, |
1336 | { "BCM2E9C" }, |
1337 | { "BCM2E9D" }, |
1338 | { "BCM2EA0" }, |
1339 | { "BCM2EA1" }, |
1340 | { "BCM2EA2" }, |
1341 | { "BCM2EA3" }, |
1342 | { "BCM2EA4" }, |
1343 | { "BCM2EA5" }, |
1344 | { "BCM2EA6" }, |
1345 | { "BCM2EA7" }, |
1346 | { "BCM2EA8" }, |
1347 | { "BCM2EA9" }, |
1348 | { "BCM2EAA" }, |
1349 | { "BCM2EAB" }, |
1350 | { "BCM2EAC" }, |
1351 | { }, |
1352 | }; |
1353 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); |
1354 | #endif |
1355 | |
1356 | /* suspend and resume callbacks */ |
1357 | static const struct dev_pm_ops bcm_pm_ops = { |
1358 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) |
1359 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) |
1360 | }; |
1361 | |
1362 | static struct platform_driver bcm_driver = { |
1363 | .probe = bcm_probe, |
1364 | .remove = bcm_remove, |
1365 | .driver = { |
1366 | .name = "hci_bcm" , |
1367 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1368 | .pm = &bcm_pm_ops, |
1369 | }, |
1370 | }; |
1371 | |
1372 | static int bcm_serdev_probe(struct serdev_device *serdev) |
1373 | { |
1374 | struct bcm_device *bcmdev; |
1375 | int err; |
1376 | |
1377 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); |
1378 | if (!bcmdev) |
1379 | return -ENOMEM; |
1380 | |
1381 | bcmdev->dev = &serdev->dev; |
1382 | #ifdef CONFIG_PM |
1383 | bcmdev->hu = &bcmdev->serdev_hu; |
1384 | #endif |
1385 | bcmdev->serdev_hu.serdev = serdev; |
1386 | serdev_device_set_drvdata(serdev, bcmdev); |
1387 | |
1388 | if (has_acpi_companion(&serdev->dev)) |
1389 | err = bcm_acpi_probe(bcmdev); |
1390 | else |
1391 | err = bcm_of_probe(bcmdev); |
1392 | if (err) |
1393 | return err; |
1394 | |
1395 | err = bcm_get_resources(bcmdev); |
1396 | if (err) |
1397 | return err; |
1398 | |
1399 | if (!bcmdev->shutdown) { |
1400 | dev_warn(&serdev->dev, |
1401 | "No reset resource, using default baud rate\n" ); |
1402 | bcmdev->oper_speed = bcmdev->init_speed; |
1403 | } |
1404 | |
1405 | err = bcm_gpio_set_power(bcmdev, false); |
1406 | if (err) |
1407 | dev_err(&serdev->dev, "Failed to power down\n" ); |
1408 | |
1409 | return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); |
1410 | } |
1411 | |
1412 | static void bcm_serdev_remove(struct serdev_device *serdev) |
1413 | { |
1414 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
1415 | |
1416 | hci_uart_unregister_device(&bcmdev->serdev_hu); |
1417 | } |
1418 | |
1419 | #ifdef CONFIG_OF |
1420 | static const struct of_device_id bcm_bluetooth_of_match[] = { |
1421 | { .compatible = "brcm,bcm20702a1" }, |
1422 | { .compatible = "brcm,bcm4330-bt" }, |
1423 | { .compatible = "brcm,bcm43438-bt" }, |
1424 | { }, |
1425 | }; |
1426 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); |
1427 | #endif |
1428 | |
1429 | static struct serdev_device_driver bcm_serdev_driver = { |
1430 | .probe = bcm_serdev_probe, |
1431 | .remove = bcm_serdev_remove, |
1432 | .driver = { |
1433 | .name = "hci_uart_bcm" , |
1434 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), |
1435 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1436 | .pm = &bcm_pm_ops, |
1437 | }, |
1438 | }; |
1439 | |
1440 | int __init bcm_init(void) |
1441 | { |
1442 | /* For now, we need to keep both platform device |
1443 | * driver (ACPI generated) and serdev driver (DT). |
1444 | */ |
1445 | platform_driver_register(&bcm_driver); |
1446 | serdev_device_driver_register(&bcm_serdev_driver); |
1447 | |
1448 | return hci_uart_register_proto(&bcm_proto); |
1449 | } |
1450 | |
1451 | int __exit bcm_deinit(void) |
1452 | { |
1453 | platform_driver_unregister(&bcm_driver); |
1454 | serdev_device_driver_unregister(&bcm_serdev_driver); |
1455 | |
1456 | return hci_uart_unregister_proto(&bcm_proto); |
1457 | } |
1458 | |