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 */
98struct 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 */
133struct 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 */
141static DEFINE_MUTEX(bcm_device_lock);
142static LIST_HEAD(bcm_device_list);
143
144static int irq_polarity = -1;
145module_param(irq_polarity, int, 0444);
146MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
147
148static 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
156static 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), &param,
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 */
206static 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
226static 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
272err_revert_shutdown:
273 dev->set_shutdown(dev, !powered);
274err_txco_clk_disable:
275 if (powered && !dev->res_enabled)
276 clk_disable_unprepare(dev->txco_clk);
277err_lpo_clk_disable:
278 if (powered && !dev->res_enabled)
279 clk_disable_unprepare(dev->lpo_clk);
280err_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
287static 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
300static 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
333unlock:
334 mutex_unlock(&bcm_device_lock);
335
336 return err;
337}
338
339static 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
355static 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
377static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
378static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
379#endif
380
381static 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
404static 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
446out:
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
458err_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
469static 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
512static 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
523static 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
577finalize:
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
618static 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
628static 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
656static 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
669static 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
696static 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
726static 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 */
755static 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
782unlock:
783 mutex_unlock(&bcm_device_lock);
784
785 return 0;
786}
787
788/* resume callback */
789static 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
814unlock:
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
827static const struct acpi_gpio_params first_gpio = { 0, 0, false };
828static const struct acpi_gpio_params second_gpio = { 1, 0, false };
829static const struct acpi_gpio_params third_gpio = { 2, 0, false };
830
831static 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
838static 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?) */
846static 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
860static 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
899static 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
907static 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
916static 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
937static inline int bcm_apple_get_resources(struct bcm_device *dev)
938{
939 return -EOPNOTSUPP;
940}
941#endif /* CONFIG_ACPI */
942
943static 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
949static 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 */
956static 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
974static 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
1051static 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
1105static int bcm_acpi_probe(struct bcm_device *dev)
1106{
1107 return -EINVAL;
1108}
1109#endif /* CONFIG_ACPI */
1110
1111static 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
1117static 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
1155static 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
1168static 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
1184static 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};
1353MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1354#endif
1355
1356/* suspend and resume callbacks */
1357static 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
1362static 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
1372static 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
1412static 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
1420static 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};
1426MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1427#endif
1428
1429static 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
1440int __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
1451int __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