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interconnect: qcom: Fix Kconfig indentation
[linux/fpc-iii.git] / drivers / bluetooth / hci_bcm.c
blobd2a6a4afdbbb83df5cdc01b4ad7fb7ec5f0ab75b
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Bluetooth HCI UART driver for Broadcom devices
5 *
6 * Copyright (C) 2015 Intel Corporation
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/errno.h>
11 #include <linux/skbuff.h>
12 #include <linux/firmware.h>
13 #include <linux/module.h>
14 #include <linux/acpi.h>
15 #include <linux/of.h>
16 #include <linux/property.h>
17 #include <linux/platform_data/x86/apple.h>
18 #include <linux/platform_device.h>
19 #include <linux/regulator/consumer.h>
20 #include <linux/clk.h>
21 #include <linux/gpio/consumer.h>
22 #include <linux/tty.h>
23 #include <linux/interrupt.h>
24 #include <linux/dmi.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/serdev.h>
27
28 #include <net/bluetooth/bluetooth.h>
29 #include <net/bluetooth/hci_core.h>
30
31 #include "btbcm.h"
32 #include "hci_uart.h"
33
34 #define BCM_NULL_PKT 0x00
35 #define BCM_NULL_SIZE 0
36
37 #define BCM_LM_DIAG_PKT 0x07
38 #define BCM_LM_DIAG_SIZE 63
39
40 #define BCM_TYPE49_PKT 0x31
41 #define BCM_TYPE49_SIZE 0
42
43 #define BCM_TYPE52_PKT 0x34
44 #define BCM_TYPE52_SIZE 0
45
46 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
47
48 #define BCM_NUM_SUPPLIES 2
49
50 /**
51 * struct bcm_device - device driver resources
52 * @serdev_hu: HCI UART controller struct
53 * @list: bcm_device_list node
54 * @dev: physical UART slave
55 * @name: device name logged by bt_dev_*() functions
56 * @device_wakeup: BT_WAKE pin,
57 * assert = Bluetooth device must wake up or remain awake,
58 * deassert = Bluetooth device may sleep when sleep criteria are met
59 * @shutdown: BT_REG_ON pin,
60 * power up or power down Bluetooth device internal regulators
61 * @set_device_wakeup: callback to toggle BT_WAKE pin
62 * either by accessing @device_wakeup or by calling @btlp
63 * @set_shutdown: callback to toggle BT_REG_ON pin
64 * either by accessing @shutdown or by calling @btpu/@btpd
65 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
66 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
67 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
68 * @txco_clk: external reference frequency clock used by Bluetooth device
69 * @lpo_clk: external LPO clock used by Bluetooth device
70 * @supplies: VBAT and VDDIO supplies used by Bluetooth device
71 * @res_enabled: whether clocks and supplies are prepared and enabled
72 * @init_speed: default baudrate of Bluetooth device;
73 * the host UART is initially set to this baudrate so that
74 * it can configure the Bluetooth device for @oper_speed
75 * @oper_speed: preferred baudrate of Bluetooth device;
76 * set to 0 if @init_speed is already the preferred baudrate
77 * @irq: interrupt triggered by HOST_WAKE_BT pin
78 * @irq_active_low: whether @irq is active low
79 * @hu: pointer to HCI UART controller struct,
80 * used to disable flow control during runtime suspend and system sleep
81 * @is_suspended: whether flow control is currently disabled
82 */
83 struct bcm_device {
84 /* Must be the first member, hci_serdev.c expects this. */
85 struct hci_uart serdev_hu;
86 struct list_head list;
87
88 struct device *dev;
89
90 const char *name;
91 struct gpio_desc *device_wakeup;
92 struct gpio_desc *shutdown;
93 int (*set_device_wakeup)(struct bcm_device *, bool);
94 int (*set_shutdown)(struct bcm_device *, bool);
95 #ifdef CONFIG_ACPI
96 acpi_handle btlp, btpu, btpd;
97 int gpio_count;
98 int gpio_int_idx;
99 #endif
100
101 struct clk *txco_clk;
102 struct clk *lpo_clk;
103 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
104 bool res_enabled;
105
106 u32 init_speed;
107 u32 oper_speed;
108 int irq;
109 bool irq_active_low;
110
111 #ifdef CONFIG_PM
112 struct hci_uart *hu;
113 bool is_suspended;
114 #endif
115 };
116
117 /* generic bcm uart resources */
118 struct bcm_data {
119 struct sk_buff *rx_skb;
120 struct sk_buff_head txq;
121
122 struct bcm_device *dev;
123 };
124
125 /* List of BCM BT UART devices */
126 static DEFINE_MUTEX(bcm_device_lock);
127 static LIST_HEAD(bcm_device_list);
128
129 static int irq_polarity = -1;
130 module_param(irq_polarity, int, 0444);
131 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
132
133 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
134 {
135 if (hu->serdev)
136 serdev_device_set_baudrate(hu->serdev, speed);
137 else
138 hci_uart_set_baudrate(hu, speed);
139 }
140
141 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
142 {
143 struct hci_dev *hdev = hu->hdev;
144 struct sk_buff *skb;
145 struct bcm_update_uart_baud_rate param;
146
147 if (speed > 3000000) {
148 struct bcm_write_uart_clock_setting clock;
149
150 clock.type = BCM_UART_CLOCK_48MHZ;
151
152 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
153
154 /* This Broadcom specific command changes the UART's controller
155 * clock for baud rate > 3000000.
156 */
157 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
158 if (IS_ERR(skb)) {
159 int err = PTR_ERR(skb);
160 bt_dev_err(hdev, "BCM: failed to write clock (%d)",
161 err);
162 return err;
163 }
164
165 kfree_skb(skb);
166 }
167
168 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
169
170 param.zero = cpu_to_le16(0);
171 param.baud_rate = cpu_to_le32(speed);
172
173 /* This Broadcom specific command changes the UART's controller baud
174 * rate.
175 */
176 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
177 HCI_INIT_TIMEOUT);
178 if (IS_ERR(skb)) {
179 int err = PTR_ERR(skb);
180 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
181 err);
182 return err;
183 }
184
185 kfree_skb(skb);
186
187 return 0;
188 }
189
190 /* bcm_device_exists should be protected by bcm_device_lock */
191 static bool bcm_device_exists(struct bcm_device *device)
192 {
193 struct list_head *p;
194
195 #ifdef CONFIG_PM
196 /* Devices using serdev always exist */
197 if (device && device->hu && device->hu->serdev)
198 return true;
199 #endif
200
201 list_for_each(p, &bcm_device_list) {
202 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
203
204 if (device == dev)
205 return true;
206 }
207
208 return false;
209 }
210
211 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
212 {
213 int err;
214
215 if (powered && !dev->res_enabled) {
216 /* Intel Macs use bcm_apple_get_resources() and don't
217 * have regulator supplies configured.
218 */
219 if (dev->supplies[0].supply) {
220 err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
221 dev->supplies);
222 if (err)
223 return err;
224 }
225
226 /* LPO clock needs to be 32.768 kHz */
227 err = clk_set_rate(dev->lpo_clk, 32768);
228 if (err) {
229 dev_err(dev->dev, "Could not set LPO clock rate\n");
230 goto err_regulator_disable;
231 }
232
233 err = clk_prepare_enable(dev->lpo_clk);
234 if (err)
235 goto err_regulator_disable;
236
237 err = clk_prepare_enable(dev->txco_clk);
238 if (err)
239 goto err_lpo_clk_disable;
240 }
241
242 err = dev->set_shutdown(dev, powered);
243 if (err)
244 goto err_txco_clk_disable;
245
246 err = dev->set_device_wakeup(dev, powered);
247 if (err)
248 goto err_revert_shutdown;
249
250 if (!powered && dev->res_enabled) {
251 clk_disable_unprepare(dev->txco_clk);
252 clk_disable_unprepare(dev->lpo_clk);
253
254 /* Intel Macs use bcm_apple_get_resources() and don't
255 * have regulator supplies configured.
256 */
257 if (dev->supplies[0].supply)
258 regulator_bulk_disable(BCM_NUM_SUPPLIES,
259 dev->supplies);
260 }
261
262 /* wait for device to power on and come out of reset */
263 usleep_range(100000, 120000);
264
265 dev->res_enabled = powered;
266
267 return 0;
268
269 err_revert_shutdown:
270 dev->set_shutdown(dev, !powered);
271 err_txco_clk_disable:
272 if (powered && !dev->res_enabled)
273 clk_disable_unprepare(dev->txco_clk);
274 err_lpo_clk_disable:
275 if (powered && !dev->res_enabled)
276 clk_disable_unprepare(dev->lpo_clk);
277 err_regulator_disable:
278 if (powered && !dev->res_enabled)
279 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
280 return err;
281 }
282
283 #ifdef CONFIG_PM
284 static irqreturn_t bcm_host_wake(int irq, void *data)
285 {
286 struct bcm_device *bdev = data;
287
288 bt_dev_dbg(bdev, "Host wake IRQ");
289
290 pm_runtime_get(bdev->dev);
291 pm_runtime_mark_last_busy(bdev->dev);
292 pm_runtime_put_autosuspend(bdev->dev);
293
294 return IRQ_HANDLED;
295 }
296
297 static int bcm_request_irq(struct bcm_data *bcm)
298 {
299 struct bcm_device *bdev = bcm->dev;
300 int err;
301
302 mutex_lock(&bcm_device_lock);
303 if (!bcm_device_exists(bdev)) {
304 err = -ENODEV;
305 goto unlock;
306 }
307
308 if (bdev->irq <= 0) {
309 err = -EOPNOTSUPP;
310 goto unlock;
311 }
312
313 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
314 bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
315 IRQF_TRIGGER_RISING,
316 "host_wake", bdev);
317 if (err) {
318 bdev->irq = err;
319 goto unlock;
320 }
321
322 device_init_wakeup(bdev->dev, true);
323
324 pm_runtime_set_autosuspend_delay(bdev->dev,
325 BCM_AUTOSUSPEND_DELAY);
326 pm_runtime_use_autosuspend(bdev->dev);
327 pm_runtime_set_active(bdev->dev);
328 pm_runtime_enable(bdev->dev);
329
330 unlock:
331 mutex_unlock(&bcm_device_lock);
332
333 return err;
334 }
335
336 static const struct bcm_set_sleep_mode default_sleep_params = {
337 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
338 .idle_host = 2, /* idle threshold HOST, in 300ms */
339 .idle_dev = 2, /* idle threshold device, in 300ms */
340 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
341 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
342 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
343 .combine_modes = 1, /* Combine sleep and LPM flag */
344 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
345 /* Irrelevant USB flags */
346 .usb_auto_sleep = 0,
347 .usb_resume_timeout = 0,
348 .break_to_host = 0,
349 .pulsed_host_wake = 1,
350 };
351
352 static int bcm_setup_sleep(struct hci_uart *hu)
353 {
354 struct bcm_data *bcm = hu->priv;
355 struct sk_buff *skb;
356 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
357
358 sleep_params.host_wake_active = !bcm->dev->irq_active_low;
359
360 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
361 &sleep_params, HCI_INIT_TIMEOUT);
362 if (IS_ERR(skb)) {
363 int err = PTR_ERR(skb);
364 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
365 return err;
366 }
367 kfree_skb(skb);
368
369 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
370
371 return 0;
372 }
373 #else
374 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
375 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
376 #endif
377
378 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
379 {
380 struct hci_uart *hu = hci_get_drvdata(hdev);
381 struct bcm_data *bcm = hu->priv;
382 struct sk_buff *skb;
383
384 if (!test_bit(HCI_RUNNING, &hdev->flags))
385 return -ENETDOWN;
386
387 skb = bt_skb_alloc(3, GFP_KERNEL);
388 if (!skb)
389 return -ENOMEM;
390
391 skb_put_u8(skb, BCM_LM_DIAG_PKT);
392 skb_put_u8(skb, 0xf0);
393 skb_put_u8(skb, enable);
394
395 skb_queue_tail(&bcm->txq, skb);
396 hci_uart_tx_wakeup(hu);
397
398 return 0;
399 }
400
401 static int bcm_open(struct hci_uart *hu)
402 {
403 struct bcm_data *bcm;
404 struct list_head *p;
405 int err;
406
407 bt_dev_dbg(hu->hdev, "hu %p", hu);
408
409 if (!hci_uart_has_flow_control(hu))
410 return -EOPNOTSUPP;
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 hci_uart_set_flow_control(hu, true);
449 hu->init_speed = bcm->dev->init_speed;
450 hu->oper_speed = bcm->dev->oper_speed;
451 err = bcm_gpio_set_power(bcm->dev, true);
452 hci_uart_set_flow_control(hu, false);
453 if (err)
454 goto err_unset_hu;
455 }
456
457 mutex_unlock(&bcm_device_lock);
458 return 0;
459
460 err_unset_hu:
461 #ifdef CONFIG_PM
462 if (!hu->serdev)
463 bcm->dev->hu = NULL;
464 #endif
465 mutex_unlock(&bcm_device_lock);
466 hu->priv = NULL;
467 kfree(bcm);
468 return err;
469 }
470
471 static int bcm_close(struct hci_uart *hu)
472 {
473 struct bcm_data *bcm = hu->priv;
474 struct bcm_device *bdev = NULL;
475 int err;
476
477 bt_dev_dbg(hu->hdev, "hu %p", hu);
478
479 /* Protect bcm->dev against removal of the device or driver */
480 mutex_lock(&bcm_device_lock);
481
482 if (hu->serdev) {
483 bdev = serdev_device_get_drvdata(hu->serdev);
484 } else if (bcm_device_exists(bcm->dev)) {
485 bdev = bcm->dev;
486 #ifdef CONFIG_PM
487 bdev->hu = NULL;
488 #endif
489 }
490
491 if (bdev) {
492 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
493 devm_free_irq(bdev->dev, bdev->irq, bdev);
494 device_init_wakeup(bdev->dev, false);
495 pm_runtime_disable(bdev->dev);
496 }
497
498 err = bcm_gpio_set_power(bdev, false);
499 if (err)
500 bt_dev_err(hu->hdev, "Failed to power down");
501 else
502 pm_runtime_set_suspended(bdev->dev);
503 }
504 mutex_unlock(&bcm_device_lock);
505
506 skb_queue_purge(&bcm->txq);
507 kfree_skb(bcm->rx_skb);
508 kfree(bcm);
509
510 hu->priv = NULL;
511 return 0;
512 }
513
514 static int bcm_flush(struct hci_uart *hu)
515 {
516 struct bcm_data *bcm = hu->priv;
517
518 bt_dev_dbg(hu->hdev, "hu %p", hu);
519
520 skb_queue_purge(&bcm->txq);
521
522 return 0;
523 }
524
525 static int bcm_setup(struct hci_uart *hu)
526 {
527 struct bcm_data *bcm = hu->priv;
528 char fw_name[64];
529 const struct firmware *fw;
530 unsigned int speed;
531 int err;
532
533 bt_dev_dbg(hu->hdev, "hu %p", hu);
534
535 hu->hdev->set_diag = bcm_set_diag;
536 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
537
538 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
539 if (err)
540 return err;
541
542 err = request_firmware(&fw, fw_name, &hu->hdev->dev);
543 if (err < 0) {
544 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
545 return 0;
546 }
547
548 err = btbcm_patchram(hu->hdev, fw);
549 if (err) {
550 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
551 goto finalize;
552 }
553
554 /* Init speed if any */
555 if (hu->init_speed)
556 speed = hu->init_speed;
557 else if (hu->proto->init_speed)
558 speed = hu->proto->init_speed;
559 else
560 speed = 0;
561
562 if (speed)
563 host_set_baudrate(hu, speed);
564
565 /* Operational speed if any */
566 if (hu->oper_speed)
567 speed = hu->oper_speed;
568 else if (hu->proto->oper_speed)
569 speed = hu->proto->oper_speed;
570 else
571 speed = 0;
572
573 if (speed) {
574 err = bcm_set_baudrate(hu, speed);
575 if (!err)
576 host_set_baudrate(hu, speed);
577 }
578
579 finalize:
580 release_firmware(fw);
581
582 err = btbcm_finalize(hu->hdev);
583 if (err)
584 return err;
585
586 if (!bcm_request_irq(bcm))
587 err = bcm_setup_sleep(hu);
588
589 return err;
590 }
591
592 #define BCM_RECV_LM_DIAG \
593 .type = BCM_LM_DIAG_PKT, \
594 .hlen = BCM_LM_DIAG_SIZE, \
595 .loff = 0, \
596 .lsize = 0, \
597 .maxlen = BCM_LM_DIAG_SIZE
598
599 #define BCM_RECV_NULL \
600 .type = BCM_NULL_PKT, \
601 .hlen = BCM_NULL_SIZE, \
602 .loff = 0, \
603 .lsize = 0, \
604 .maxlen = BCM_NULL_SIZE
605
606 #define BCM_RECV_TYPE49 \
607 .type = BCM_TYPE49_PKT, \
608 .hlen = BCM_TYPE49_SIZE, \
609 .loff = 0, \
610 .lsize = 0, \
611 .maxlen = BCM_TYPE49_SIZE
612
613 #define BCM_RECV_TYPE52 \
614 .type = BCM_TYPE52_PKT, \
615 .hlen = BCM_TYPE52_SIZE, \
616 .loff = 0, \
617 .lsize = 0, \
618 .maxlen = BCM_TYPE52_SIZE
619
620 static const struct h4_recv_pkt bcm_recv_pkts[] = {
621 { H4_RECV_ACL, .recv = hci_recv_frame },
622 { H4_RECV_SCO, .recv = hci_recv_frame },
623 { H4_RECV_EVENT, .recv = hci_recv_frame },
624 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
625 { BCM_RECV_NULL, .recv = hci_recv_diag },
626 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
627 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
628 };
629
630 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
631 {
632 struct bcm_data *bcm = hu->priv;
633
634 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
635 return -EUNATCH;
636
637 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
638 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
639 if (IS_ERR(bcm->rx_skb)) {
640 int err = PTR_ERR(bcm->rx_skb);
641 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
642 bcm->rx_skb = NULL;
643 return err;
644 } else if (!bcm->rx_skb) {
645 /* Delay auto-suspend when receiving completed packet */
646 mutex_lock(&bcm_device_lock);
647 if (bcm->dev && bcm_device_exists(bcm->dev)) {
648 pm_runtime_get(bcm->dev->dev);
649 pm_runtime_mark_last_busy(bcm->dev->dev);
650 pm_runtime_put_autosuspend(bcm->dev->dev);
651 }
652 mutex_unlock(&bcm_device_lock);
653 }
654
655 return count;
656 }
657
658 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
659 {
660 struct bcm_data *bcm = hu->priv;
661
662 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
663
664 /* Prepend skb with frame type */
665 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
666 skb_queue_tail(&bcm->txq, skb);
667
668 return 0;
669 }
670
671 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
672 {
673 struct bcm_data *bcm = hu->priv;
674 struct sk_buff *skb = NULL;
675 struct bcm_device *bdev = NULL;
676
677 mutex_lock(&bcm_device_lock);
678
679 if (bcm_device_exists(bcm->dev)) {
680 bdev = bcm->dev;
681 pm_runtime_get_sync(bdev->dev);
682 /* Shall be resumed here */
683 }
684
685 skb = skb_dequeue(&bcm->txq);
686
687 if (bdev) {
688 pm_runtime_mark_last_busy(bdev->dev);
689 pm_runtime_put_autosuspend(bdev->dev);
690 }
691
692 mutex_unlock(&bcm_device_lock);
693
694 return skb;
695 }
696
697 #ifdef CONFIG_PM
698 static int bcm_suspend_device(struct device *dev)
699 {
700 struct bcm_device *bdev = dev_get_drvdata(dev);
701 int err;
702
703 bt_dev_dbg(bdev, "");
704
705 if (!bdev->is_suspended && bdev->hu) {
706 hci_uart_set_flow_control(bdev->hu, true);
707
708 /* Once this returns, driver suspends BT via GPIO */
709 bdev->is_suspended = true;
710 }
711
712 /* Suspend the device */
713 err = bdev->set_device_wakeup(bdev, false);
714 if (err) {
715 if (bdev->is_suspended && bdev->hu) {
716 bdev->is_suspended = false;
717 hci_uart_set_flow_control(bdev->hu, false);
718 }
719 return -EBUSY;
720 }
721
722 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
723 msleep(15);
724
725 return 0;
726 }
727
728 static int bcm_resume_device(struct device *dev)
729 {
730 struct bcm_device *bdev = dev_get_drvdata(dev);
731 int err;
732
733 bt_dev_dbg(bdev, "");
734
735 err = bdev->set_device_wakeup(bdev, true);
736 if (err) {
737 dev_err(dev, "Failed to power up\n");
738 return err;
739 }
740
741 bt_dev_dbg(bdev, "resume, delaying 15 ms");
742 msleep(15);
743
744 /* When this executes, the device has woken up already */
745 if (bdev->is_suspended && bdev->hu) {
746 bdev->is_suspended = false;
747
748 hci_uart_set_flow_control(bdev->hu, false);
749 }
750
751 return 0;
752 }
753 #endif
754
755 #ifdef CONFIG_PM_SLEEP
756 /* suspend callback */
757 static int bcm_suspend(struct device *dev)
758 {
759 struct bcm_device *bdev = dev_get_drvdata(dev);
760 int error;
761
762 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
763
764 /*
765 * When used with a device instantiated as platform_device, bcm_suspend
766 * can be called at any time as long as the platform device is bound,
767 * so it should use bcm_device_lock to protect access to hci_uart
768 * and device_wake-up GPIO.
769 */
770 mutex_lock(&bcm_device_lock);
771
772 if (!bdev->hu)
773 goto unlock;
774
775 if (pm_runtime_active(dev))
776 bcm_suspend_device(dev);
777
778 if (device_may_wakeup(dev) && bdev->irq > 0) {
779 error = enable_irq_wake(bdev->irq);
780 if (!error)
781 bt_dev_dbg(bdev, "BCM irq: enabled");
782 }
783
784 unlock:
785 mutex_unlock(&bcm_device_lock);
786
787 return 0;
788 }
789
790 /* resume callback */
791 static int bcm_resume(struct device *dev)
792 {
793 struct bcm_device *bdev = dev_get_drvdata(dev);
794 int err = 0;
795
796 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
797
798 /*
799 * When used with a device instantiated as platform_device, bcm_resume
800 * can be called at any time as long as platform device is bound,
801 * so it should use bcm_device_lock to protect access to hci_uart
802 * and device_wake-up GPIO.
803 */
804 mutex_lock(&bcm_device_lock);
805
806 if (!bdev->hu)
807 goto unlock;
808
809 if (device_may_wakeup(dev) && bdev->irq > 0) {
810 disable_irq_wake(bdev->irq);
811 bt_dev_dbg(bdev, "BCM irq: disabled");
812 }
813
814 err = bcm_resume_device(dev);
815
816 unlock:
817 mutex_unlock(&bcm_device_lock);
818
819 if (!err) {
820 pm_runtime_disable(dev);
821 pm_runtime_set_active(dev);
822 pm_runtime_enable(dev);
823 }
824
825 return 0;
826 }
827 #endif
828
829 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
830 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
831 {
832 .ident = "Meegopad T08",
833 .matches = {
834 DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
835 "To be filled by OEM."),
836 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
837 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
838 },
839 },
840 { }
841 };
842
843 #ifdef CONFIG_ACPI
844 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
845 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
846 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
847
848 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
849 { "device-wakeup-gpios", &first_gpio, 1 },
850 { "shutdown-gpios", &second_gpio, 1 },
851 { "host-wakeup-gpios", &third_gpio, 1 },
852 { },
853 };
854
855 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
856 { "host-wakeup-gpios", &first_gpio, 1 },
857 { "device-wakeup-gpios", &second_gpio, 1 },
858 { "shutdown-gpios", &third_gpio, 1 },
859 { },
860 };
861
862 static int bcm_resource(struct acpi_resource *ares, void *data)
863 {
864 struct bcm_device *dev = data;
865 struct acpi_resource_extended_irq *irq;
866 struct acpi_resource_gpio *gpio;
867 struct acpi_resource_uart_serialbus *sb;
868
869 switch (ares->type) {
870 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
871 irq = &ares->data.extended_irq;
872 if (irq->polarity != ACPI_ACTIVE_LOW)
873 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
874 dev->irq_active_low = true;
875 break;
876
877 case ACPI_RESOURCE_TYPE_GPIO:
878 gpio = &ares->data.gpio;
879 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
880 dev->gpio_int_idx = dev->gpio_count;
881 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
882 }
883 dev->gpio_count++;
884 break;
885
886 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
887 sb = &ares->data.uart_serial_bus;
888 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
889 dev->init_speed = sb->default_baud_rate;
890 dev->oper_speed = 4000000;
891 }
892 break;
893
894 default:
895 break;
896 }
897
898 return 0;
899 }
900
901 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
902 {
903 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
904 return -EIO;
905
906 return 0;
907 }
908
909 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
910 {
911 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
912 NULL, NULL, NULL)))
913 return -EIO;
914
915 return 0;
916 }
917
918 static int bcm_apple_get_resources(struct bcm_device *dev)
919 {
920 struct acpi_device *adev = ACPI_COMPANION(dev->dev);
921 const union acpi_object *obj;
922
923 if (!adev ||
924 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
925 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
926 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
927 return -ENODEV;
928
929 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
930 obj->buffer.length == 8)
931 dev->init_speed = *(u64 *)obj->buffer.pointer;
932
933 dev->set_device_wakeup = bcm_apple_set_device_wakeup;
934 dev->set_shutdown = bcm_apple_set_shutdown;
935
936 return 0;
937 }
938 #else
939 static inline int bcm_apple_get_resources(struct bcm_device *dev)
940 {
941 return -EOPNOTSUPP;
942 }
943 #endif /* CONFIG_ACPI */
944
945 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
946 {
947 gpiod_set_value_cansleep(dev->device_wakeup, awake);
948 return 0;
949 }
950
951 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
952 {
953 gpiod_set_value_cansleep(dev->shutdown, powered);
954 return 0;
955 }
956
957 /* Try a bunch of names for TXCO */
958 static struct clk *bcm_get_txco(struct device *dev)
959 {
960 struct clk *clk;
961
962 /* New explicit name */
963 clk = devm_clk_get(dev, "txco");
964 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
965 return clk;
966
967 /* Deprecated name */
968 clk = devm_clk_get(dev, "extclk");
969 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
970 return clk;
971
972 /* Original code used no name at all */
973 return devm_clk_get(dev, NULL);
974 }
975
976 static int bcm_get_resources(struct bcm_device *dev)
977 {
978 const struct dmi_system_id *dmi_id;
979 int err;
980
981 dev->name = dev_name(dev->dev);
982
983 if (x86_apple_machine && !bcm_apple_get_resources(dev))
984 return 0;
985
986 dev->txco_clk = bcm_get_txco(dev->dev);
987
988 /* Handle deferred probing */
989 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
990 return PTR_ERR(dev->txco_clk);
991
992 /* Ignore all other errors as before */
993 if (IS_ERR(dev->txco_clk))
994 dev->txco_clk = NULL;
995
996 dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
997 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
998 return PTR_ERR(dev->lpo_clk);
999
1000 if (IS_ERR(dev->lpo_clk))
1001 dev->lpo_clk = NULL;
1002
1003 /* Check if we accidentally fetched the lpo clock twice */
1004 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1005 devm_clk_put(dev->dev, dev->txco_clk);
1006 dev->txco_clk = NULL;
1007 }
1008
1009 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1010 GPIOD_OUT_LOW);
1011 if (IS_ERR(dev->device_wakeup))
1012 return PTR_ERR(dev->device_wakeup);
1013
1014 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1015 GPIOD_OUT_LOW);
1016 if (IS_ERR(dev->shutdown))
1017 return PTR_ERR(dev->shutdown);
1018
1019 dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1020 dev->set_shutdown = bcm_gpio_set_shutdown;
1021
1022 dev->supplies[0].supply = "vbat";
1023 dev->supplies[1].supply = "vddio";
1024 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1025 dev->supplies);
1026 if (err)
1027 return err;
1028
1029 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1030 if (dev->irq <= 0) {
1031 struct gpio_desc *gpio;
1032
1033 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1034 GPIOD_IN);
1035 if (IS_ERR(gpio))
1036 return PTR_ERR(gpio);
1037
1038 dev->irq = gpiod_to_irq(gpio);
1039 }
1040
1041 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1042 if (dmi_id) {
1043 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1044 dmi_id->ident);
1045 dev->irq = 0;
1046 }
1047
1048 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1049 return 0;
1050 }
1051
1052 #ifdef CONFIG_ACPI
1053 static int bcm_acpi_probe(struct bcm_device *dev)
1054 {
1055 LIST_HEAD(resources);
1056 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1057 struct resource_entry *entry;
1058 int ret;
1059
1060 /* Retrieve UART ACPI info */
1061 dev->gpio_int_idx = -1;
1062 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1063 &resources, bcm_resource, dev);
1064 if (ret < 0)
1065 return ret;
1066
1067 resource_list_for_each_entry(entry, &resources) {
1068 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1069 dev->irq = entry->res->start;
1070 break;
1071 }
1072 }
1073 acpi_dev_free_resource_list(&resources);
1074
1075 /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1076 * only 2 GPIO resources, we use the irq-last mapping for this, since
1077 * we already have an irq the 3th / last mapping will not be used.
1078 */
1079 if (dev->irq)
1080 gpio_mapping = acpi_bcm_int_last_gpios;
1081 else if (dev->gpio_int_idx == 0)
1082 gpio_mapping = acpi_bcm_int_first_gpios;
1083 else if (dev->gpio_int_idx == 2)
1084 gpio_mapping = acpi_bcm_int_last_gpios;
1085 else
1086 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1087 dev->gpio_int_idx);
1088
1089 /* Warn if our expectations are not met. */
1090 if (dev->gpio_count != (dev->irq ? 2 : 3))
1091 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1092 dev->gpio_count);
1093
1094 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1095 if (ret)
1096 return ret;
1097
1098 if (irq_polarity != -1) {
1099 dev->irq_active_low = irq_polarity;
1100 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1101 dev->irq_active_low ? "low" : "high");
1102 }
1103
1104 return 0;
1105 }
1106 #else
1107 static int bcm_acpi_probe(struct bcm_device *dev)
1108 {
1109 return -EINVAL;
1110 }
1111 #endif /* CONFIG_ACPI */
1112
1113 static int bcm_of_probe(struct bcm_device *bdev)
1114 {
1115 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1116 return 0;
1117 }
1118
1119 static int bcm_probe(struct platform_device *pdev)
1120 {
1121 struct bcm_device *dev;
1122 int ret;
1123
1124 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1125 if (!dev)
1126 return -ENOMEM;
1127
1128 dev->dev = &pdev->dev;
1129 dev->irq = platform_get_irq(pdev, 0);
1130
1131 if (has_acpi_companion(&pdev->dev)) {
1132 ret = bcm_acpi_probe(dev);
1133 if (ret)
1134 return ret;
1135 }
1136
1137 ret = bcm_get_resources(dev);
1138 if (ret)
1139 return ret;
1140
1141 platform_set_drvdata(pdev, dev);
1142
1143 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1144
1145 /* Place this instance on the device list */
1146 mutex_lock(&bcm_device_lock);
1147 list_add_tail(&dev->list, &bcm_device_list);
1148 mutex_unlock(&bcm_device_lock);
1149
1150 ret = bcm_gpio_set_power(dev, false);
1151 if (ret)
1152 dev_err(&pdev->dev, "Failed to power down\n");
1153
1154 return 0;
1155 }
1156
1157 static int bcm_remove(struct platform_device *pdev)
1158 {
1159 struct bcm_device *dev = platform_get_drvdata(pdev);
1160
1161 mutex_lock(&bcm_device_lock);
1162 list_del(&dev->list);
1163 mutex_unlock(&bcm_device_lock);
1164
1165 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1166
1167 return 0;
1168 }
1169
1170 static const struct hci_uart_proto bcm_proto = {
1171 .id = HCI_UART_BCM,
1172 .name = "Broadcom",
1173 .manufacturer = 15,
1174 .init_speed = 115200,
1175 .open = bcm_open,
1176 .close = bcm_close,
1177 .flush = bcm_flush,
1178 .setup = bcm_setup,
1179 .set_baudrate = bcm_set_baudrate,
1180 .recv = bcm_recv,
1181 .enqueue = bcm_enqueue,
1182 .dequeue = bcm_dequeue,
1183 };
1184
1185 #ifdef CONFIG_ACPI
1186 static const struct acpi_device_id bcm_acpi_match[] = {
1187 { "BCM2E00" },
1188 { "BCM2E01" },
1189 { "BCM2E02" },
1190 { "BCM2E03" },
1191 { "BCM2E04" },
1192 { "BCM2E05" },
1193 { "BCM2E06" },
1194 { "BCM2E07" },
1195 { "BCM2E08" },
1196 { "BCM2E09" },
1197 { "BCM2E0A" },
1198 { "BCM2E0B" },
1199 { "BCM2E0C" },
1200 { "BCM2E0D" },
1201 { "BCM2E0E" },
1202 { "BCM2E0F" },
1203 { "BCM2E10" },
1204 { "BCM2E11" },
1205 { "BCM2E12" },
1206 { "BCM2E13" },
1207 { "BCM2E14" },
1208 { "BCM2E15" },
1209 { "BCM2E16" },
1210 { "BCM2E17" },
1211 { "BCM2E18" },
1212 { "BCM2E19" },
1213 { "BCM2E1A" },
1214 { "BCM2E1B" },
1215 { "BCM2E1C" },
1216 { "BCM2E1D" },
1217 { "BCM2E1F" },
1218 { "BCM2E20" },
1219 { "BCM2E21" },
1220 { "BCM2E22" },
1221 { "BCM2E23" },
1222 { "BCM2E24" },
1223 { "BCM2E25" },
1224 { "BCM2E26" },
1225 { "BCM2E27" },
1226 { "BCM2E28" },
1227 { "BCM2E29" },
1228 { "BCM2E2A" },
1229 { "BCM2E2B" },
1230 { "BCM2E2C" },
1231 { "BCM2E2D" },
1232 { "BCM2E2E" },
1233 { "BCM2E2F" },
1234 { "BCM2E30" },
1235 { "BCM2E31" },
1236 { "BCM2E32" },
1237 { "BCM2E33" },
1238 { "BCM2E34" },
1239 { "BCM2E35" },
1240 { "BCM2E36" },
1241 { "BCM2E37" },
1242 { "BCM2E38" },
1243 { "BCM2E39" },
1244 { "BCM2E3A" },
1245 { "BCM2E3B" },
1246 { "BCM2E3C" },
1247 { "BCM2E3D" },
1248 { "BCM2E3E" },
1249 { "BCM2E3F" },
1250 { "BCM2E40" },
1251 { "BCM2E41" },
1252 { "BCM2E42" },
1253 { "BCM2E43" },
1254 { "BCM2E44" },
1255 { "BCM2E45" },
1256 { "BCM2E46" },
1257 { "BCM2E47" },
1258 { "BCM2E48" },
1259 { "BCM2E49" },
1260 { "BCM2E4A" },
1261 { "BCM2E4B" },
1262 { "BCM2E4C" },
1263 { "BCM2E4D" },
1264 { "BCM2E4E" },
1265 { "BCM2E4F" },
1266 { "BCM2E50" },
1267 { "BCM2E51" },
1268 { "BCM2E52" },
1269 { "BCM2E53" },
1270 { "BCM2E54" },
1271 { "BCM2E55" },
1272 { "BCM2E56" },
1273 { "BCM2E57" },
1274 { "BCM2E58" },
1275 { "BCM2E59" },
1276 { "BCM2E5A" },
1277 { "BCM2E5B" },
1278 { "BCM2E5C" },
1279 { "BCM2E5D" },
1280 { "BCM2E5E" },
1281 { "BCM2E5F" },
1282 { "BCM2E60" },
1283 { "BCM2E61" },
1284 { "BCM2E62" },
1285 { "BCM2E63" },
1286 { "BCM2E64" },
1287 { "BCM2E65" },
1288 { "BCM2E66" },
1289 { "BCM2E67" },
1290 { "BCM2E68" },
1291 { "BCM2E69" },
1292 { "BCM2E6B" },
1293 { "BCM2E6D" },
1294 { "BCM2E6E" },
1295 { "BCM2E6F" },
1296 { "BCM2E70" },
1297 { "BCM2E71" },
1298 { "BCM2E72" },
1299 { "BCM2E73" },
1300 { "BCM2E74" },
1301 { "BCM2E75" },
1302 { "BCM2E76" },
1303 { "BCM2E77" },
1304 { "BCM2E78" },
1305 { "BCM2E79" },
1306 { "BCM2E7A" },
1307 { "BCM2E7B" },
1308 { "BCM2E7C" },
1309 { "BCM2E7D" },
1310 { "BCM2E7E" },
1311 { "BCM2E7F" },
1312 { "BCM2E80" },
1313 { "BCM2E81" },
1314 { "BCM2E82" },
1315 { "BCM2E83" },
1316 { "BCM2E84" },
1317 { "BCM2E85" },
1318 { "BCM2E86" },
1319 { "BCM2E87" },
1320 { "BCM2E88" },
1321 { "BCM2E89" },
1322 { "BCM2E8A" },
1323 { "BCM2E8B" },
1324 { "BCM2E8C" },
1325 { "BCM2E8D" },
1326 { "BCM2E8E" },
1327 { "BCM2E90" },
1328 { "BCM2E92" },
1329 { "BCM2E93" },
1330 { "BCM2E94" },
1331 { "BCM2E95" },
1332 { "BCM2E96" },
1333 { "BCM2E97" },
1334 { "BCM2E98" },
1335 { "BCM2E99" },
1336 { "BCM2E9A" },
1337 { "BCM2E9B" },
1338 { "BCM2E9C" },
1339 { "BCM2E9D" },
1340 { "BCM2EA0" },
1341 { "BCM2EA1" },
1342 { "BCM2EA2" },
1343 { "BCM2EA3" },
1344 { "BCM2EA4" },
1345 { "BCM2EA5" },
1346 { "BCM2EA6" },
1347 { "BCM2EA7" },
1348 { "BCM2EA8" },
1349 { "BCM2EA9" },
1350 { "BCM2EAA" },
1351 { "BCM2EAB" },
1352 { "BCM2EAC" },
1353 { },
1354 };
1355 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1356 #endif
1357
1358 /* suspend and resume callbacks */
1359 static const struct dev_pm_ops bcm_pm_ops = {
1360 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1361 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1362 };
1363
1364 static struct platform_driver bcm_driver = {
1365 .probe = bcm_probe,
1366 .remove = bcm_remove,
1367 .driver = {
1368 .name = "hci_bcm",
1369 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1370 .pm = &bcm_pm_ops,
1371 },
1372 };
1373
1374 static int bcm_serdev_probe(struct serdev_device *serdev)
1375 {
1376 struct bcm_device *bcmdev;
1377 int err;
1378
1379 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1380 if (!bcmdev)
1381 return -ENOMEM;
1382
1383 bcmdev->dev = &serdev->dev;
1384 #ifdef CONFIG_PM
1385 bcmdev->hu = &bcmdev->serdev_hu;
1386 #endif
1387 bcmdev->serdev_hu.serdev = serdev;
1388 serdev_device_set_drvdata(serdev, bcmdev);
1389
1390 if (has_acpi_companion(&serdev->dev))
1391 err = bcm_acpi_probe(bcmdev);
1392 else
1393 err = bcm_of_probe(bcmdev);
1394 if (err)
1395 return err;
1396
1397 err = bcm_get_resources(bcmdev);
1398 if (err)
1399 return err;
1400
1401 if (!bcmdev->shutdown) {
1402 dev_warn(&serdev->dev,
1403 "No reset resource, using default baud rate\n");
1404 bcmdev->oper_speed = bcmdev->init_speed;
1405 }
1406
1407 err = bcm_gpio_set_power(bcmdev, false);
1408 if (err)
1409 dev_err(&serdev->dev, "Failed to power down\n");
1410
1411 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1412 }
1413
1414 static void bcm_serdev_remove(struct serdev_device *serdev)
1415 {
1416 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1417
1418 hci_uart_unregister_device(&bcmdev->serdev_hu);
1419 }
1420
1421 #ifdef CONFIG_OF
1422 static const struct of_device_id bcm_bluetooth_of_match[] = {
1423 { .compatible = "brcm,bcm20702a1" },
1424 { .compatible = "brcm,bcm4345c5" },
1425 { .compatible = "brcm,bcm4330-bt" },
1426 { .compatible = "brcm,bcm43438-bt" },
1427 { .compatible = "brcm,bcm43540-bt" },
1428 { .compatible = "brcm,bcm4335a0" },
1429 { },
1430 };
1431 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1432 #endif
1433
1434 static struct serdev_device_driver bcm_serdev_driver = {
1435 .probe = bcm_serdev_probe,
1436 .remove = bcm_serdev_remove,
1437 .driver = {
1438 .name = "hci_uart_bcm",
1439 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1440 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1441 .pm = &bcm_pm_ops,
1442 },
1443 };
1444
1445 int __init bcm_init(void)
1446 {
1447 /* For now, we need to keep both platform device
1448 * driver (ACPI generated) and serdev driver (DT).
1449 */
1450 platform_driver_register(&bcm_driver);
1451 serdev_device_driver_register(&bcm_serdev_driver);
1452
1453 return hci_uart_register_proto(&bcm_proto);
1454 }
1455
1456 int __exit bcm_deinit(void)
1457 {
1458 platform_driver_unregister(&bcm_driver);
1459 serdev_device_driver_unregister(&bcm_serdev_driver);
1460
1461 return hci_uart_unregister_proto(&bcm_proto);
1462 }
Linux with added FPC-III support