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Linux 5.1.15
[linux/fpc-iii.git] / drivers / bluetooth / hci_bcm.c
blobb5d31d583d607ecc2c2b7fa3b7cce3904f83fc11
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), &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 */
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 /* Intel Macs use bcm_apple_get_resources() and don't
232 * have regulator supplies configured.
233 */
234 if (dev->supplies[0].supply) {
235 err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
236 dev->supplies);
237 if (err)
238 return err;
239 }
240
241 /* LPO clock needs to be 32.768 kHz */
242 err = clk_set_rate(dev->lpo_clk, 32768);
243 if (err) {
244 dev_err(dev->dev, "Could not set LPO clock rate\n");
245 goto err_regulator_disable;
246 }
247
248 err = clk_prepare_enable(dev->lpo_clk);
249 if (err)
250 goto err_regulator_disable;
251
252 err = clk_prepare_enable(dev->txco_clk);
253 if (err)
254 goto err_lpo_clk_disable;
255 }
256
257 err = dev->set_shutdown(dev, powered);
258 if (err)
259 goto err_txco_clk_disable;
260
261 err = dev->set_device_wakeup(dev, powered);
262 if (err)
263 goto err_revert_shutdown;
264
265 if (!powered && dev->res_enabled) {
266 clk_disable_unprepare(dev->txco_clk);
267 clk_disable_unprepare(dev->lpo_clk);
268
269 /* Intel Macs use bcm_apple_get_resources() and don't
270 * have regulator supplies configured.
271 */
272 if (dev->supplies[0].supply)
273 regulator_bulk_disable(BCM_NUM_SUPPLIES,
274 dev->supplies);
275 }
276
277 /* wait for device to power on and come out of reset */
278 usleep_range(10000, 20000);
279
280 dev->res_enabled = powered;
281
282 return 0;
283
284 err_revert_shutdown:
285 dev->set_shutdown(dev, !powered);
286 err_txco_clk_disable:
287 if (powered && !dev->res_enabled)
288 clk_disable_unprepare(dev->txco_clk);
289 err_lpo_clk_disable:
290 if (powered && !dev->res_enabled)
291 clk_disable_unprepare(dev->lpo_clk);
292 err_regulator_disable:
293 if (powered && !dev->res_enabled)
294 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
295 return err;
296 }
297
298 #ifdef CONFIG_PM
299 static irqreturn_t bcm_host_wake(int irq, void *data)
300 {
301 struct bcm_device *bdev = data;
302
303 bt_dev_dbg(bdev, "Host wake IRQ");
304
305 pm_runtime_get(bdev->dev);
306 pm_runtime_mark_last_busy(bdev->dev);
307 pm_runtime_put_autosuspend(bdev->dev);
308
309 return IRQ_HANDLED;
310 }
311
312 static int bcm_request_irq(struct bcm_data *bcm)
313 {
314 struct bcm_device *bdev = bcm->dev;
315 int err;
316
317 mutex_lock(&bcm_device_lock);
318 if (!bcm_device_exists(bdev)) {
319 err = -ENODEV;
320 goto unlock;
321 }
322
323 if (bdev->irq <= 0) {
324 err = -EOPNOTSUPP;
325 goto unlock;
326 }
327
328 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
329 bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
330 IRQF_TRIGGER_RISING,
331 "host_wake", bdev);
332 if (err) {
333 bdev->irq = err;
334 goto unlock;
335 }
336
337 device_init_wakeup(bdev->dev, true);
338
339 pm_runtime_set_autosuspend_delay(bdev->dev,
340 BCM_AUTOSUSPEND_DELAY);
341 pm_runtime_use_autosuspend(bdev->dev);
342 pm_runtime_set_active(bdev->dev);
343 pm_runtime_enable(bdev->dev);
344
345 unlock:
346 mutex_unlock(&bcm_device_lock);
347
348 return err;
349 }
350
351 static const struct bcm_set_sleep_mode default_sleep_params = {
352 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
353 .idle_host = 2, /* idle threshold HOST, in 300ms */
354 .idle_dev = 2, /* idle threshold device, in 300ms */
355 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
356 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
357 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
358 .combine_modes = 1, /* Combine sleep and LPM flag */
359 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
360 /* Irrelevant USB flags */
361 .usb_auto_sleep = 0,
362 .usb_resume_timeout = 0,
363 .break_to_host = 0,
364 .pulsed_host_wake = 1,
365 };
366
367 static int bcm_setup_sleep(struct hci_uart *hu)
368 {
369 struct bcm_data *bcm = hu->priv;
370 struct sk_buff *skb;
371 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
372
373 sleep_params.host_wake_active = !bcm->dev->irq_active_low;
374
375 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
376 &sleep_params, HCI_INIT_TIMEOUT);
377 if (IS_ERR(skb)) {
378 int err = PTR_ERR(skb);
379 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
380 return err;
381 }
382 kfree_skb(skb);
383
384 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
385
386 return 0;
387 }
388 #else
389 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
390 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
391 #endif
392
393 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
394 {
395 struct hci_uart *hu = hci_get_drvdata(hdev);
396 struct bcm_data *bcm = hu->priv;
397 struct sk_buff *skb;
398
399 if (!test_bit(HCI_RUNNING, &hdev->flags))
400 return -ENETDOWN;
401
402 skb = bt_skb_alloc(3, GFP_KERNEL);
403 if (!skb)
404 return -ENOMEM;
405
406 skb_put_u8(skb, BCM_LM_DIAG_PKT);
407 skb_put_u8(skb, 0xf0);
408 skb_put_u8(skb, enable);
409
410 skb_queue_tail(&bcm->txq, skb);
411 hci_uart_tx_wakeup(hu);
412
413 return 0;
414 }
415
416 static int bcm_open(struct hci_uart *hu)
417 {
418 struct bcm_data *bcm;
419 struct list_head *p;
420 int err;
421
422 bt_dev_dbg(hu->hdev, "hu %p", hu);
423
424 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
425 if (!bcm)
426 return -ENOMEM;
427
428 skb_queue_head_init(&bcm->txq);
429
430 hu->priv = bcm;
431
432 mutex_lock(&bcm_device_lock);
433
434 if (hu->serdev) {
435 bcm->dev = serdev_device_get_drvdata(hu->serdev);
436 goto out;
437 }
438
439 if (!hu->tty->dev)
440 goto out;
441
442 list_for_each(p, &bcm_device_list) {
443 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
444
445 /* Retrieve saved bcm_device based on parent of the
446 * platform device (saved during device probe) and
447 * parent of tty device used by hci_uart
448 */
449 if (hu->tty->dev->parent == dev->dev->parent) {
450 bcm->dev = dev;
451 #ifdef CONFIG_PM
452 dev->hu = hu;
453 #endif
454 break;
455 }
456 }
457
458 out:
459 if (bcm->dev) {
460 hu->init_speed = bcm->dev->init_speed;
461 hu->oper_speed = bcm->dev->oper_speed;
462 err = bcm_gpio_set_power(bcm->dev, true);
463 if (err)
464 goto err_unset_hu;
465 }
466
467 mutex_unlock(&bcm_device_lock);
468 return 0;
469
470 err_unset_hu:
471 #ifdef CONFIG_PM
472 if (!hu->serdev)
473 bcm->dev->hu = NULL;
474 #endif
475 mutex_unlock(&bcm_device_lock);
476 hu->priv = NULL;
477 kfree(bcm);
478 return err;
479 }
480
481 static int bcm_close(struct hci_uart *hu)
482 {
483 struct bcm_data *bcm = hu->priv;
484 struct bcm_device *bdev = NULL;
485 int err;
486
487 bt_dev_dbg(hu->hdev, "hu %p", hu);
488
489 /* Protect bcm->dev against removal of the device or driver */
490 mutex_lock(&bcm_device_lock);
491
492 if (hu->serdev) {
493 bdev = serdev_device_get_drvdata(hu->serdev);
494 } else if (bcm_device_exists(bcm->dev)) {
495 bdev = bcm->dev;
496 #ifdef CONFIG_PM
497 bdev->hu = NULL;
498 #endif
499 }
500
501 if (bdev) {
502 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
503 devm_free_irq(bdev->dev, bdev->irq, bdev);
504 device_init_wakeup(bdev->dev, false);
505 pm_runtime_disable(bdev->dev);
506 }
507
508 err = bcm_gpio_set_power(bdev, false);
509 if (err)
510 bt_dev_err(hu->hdev, "Failed to power down");
511 else
512 pm_runtime_set_suspended(bdev->dev);
513 }
514 mutex_unlock(&bcm_device_lock);
515
516 skb_queue_purge(&bcm->txq);
517 kfree_skb(bcm->rx_skb);
518 kfree(bcm);
519
520 hu->priv = NULL;
521 return 0;
522 }
523
524 static int bcm_flush(struct hci_uart *hu)
525 {
526 struct bcm_data *bcm = hu->priv;
527
528 bt_dev_dbg(hu->hdev, "hu %p", hu);
529
530 skb_queue_purge(&bcm->txq);
531
532 return 0;
533 }
534
535 static int bcm_setup(struct hci_uart *hu)
536 {
537 struct bcm_data *bcm = hu->priv;
538 char fw_name[64];
539 const struct firmware *fw;
540 unsigned int speed;
541 int err;
542
543 bt_dev_dbg(hu->hdev, "hu %p", hu);
544
545 hu->hdev->set_diag = bcm_set_diag;
546 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
547
548 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
549 if (err)
550 return err;
551
552 err = request_firmware(&fw, fw_name, &hu->hdev->dev);
553 if (err < 0) {
554 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
555 return 0;
556 }
557
558 err = btbcm_patchram(hu->hdev, fw);
559 if (err) {
560 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
561 goto finalize;
562 }
563
564 /* Init speed if any */
565 if (hu->init_speed)
566 speed = hu->init_speed;
567 else if (hu->proto->init_speed)
568 speed = hu->proto->init_speed;
569 else
570 speed = 0;
571
572 if (speed)
573 host_set_baudrate(hu, speed);
574
575 /* Operational speed if any */
576 if (hu->oper_speed)
577 speed = hu->oper_speed;
578 else if (hu->proto->oper_speed)
579 speed = hu->proto->oper_speed;
580 else
581 speed = 0;
582
583 if (speed) {
584 err = bcm_set_baudrate(hu, speed);
585 if (!err)
586 host_set_baudrate(hu, speed);
587 }
588
589 finalize:
590 release_firmware(fw);
591
592 err = btbcm_finalize(hu->hdev);
593 if (err)
594 return err;
595
596 if (!bcm_request_irq(bcm))
597 err = bcm_setup_sleep(hu);
598
599 return err;
600 }
601
602 #define BCM_RECV_LM_DIAG \
603 .type = BCM_LM_DIAG_PKT, \
604 .hlen = BCM_LM_DIAG_SIZE, \
605 .loff = 0, \
606 .lsize = 0, \
607 .maxlen = BCM_LM_DIAG_SIZE
608
609 #define BCM_RECV_NULL \
610 .type = BCM_NULL_PKT, \
611 .hlen = BCM_NULL_SIZE, \
612 .loff = 0, \
613 .lsize = 0, \
614 .maxlen = BCM_NULL_SIZE
615
616 #define BCM_RECV_TYPE49 \
617 .type = BCM_TYPE49_PKT, \
618 .hlen = BCM_TYPE49_SIZE, \
619 .loff = 0, \
620 .lsize = 0, \
621 .maxlen = BCM_TYPE49_SIZE
622
623 #define BCM_RECV_TYPE52 \
624 .type = BCM_TYPE52_PKT, \
625 .hlen = BCM_TYPE52_SIZE, \
626 .loff = 0, \
627 .lsize = 0, \
628 .maxlen = BCM_TYPE52_SIZE
629
630 static const struct h4_recv_pkt bcm_recv_pkts[] = {
631 { H4_RECV_ACL, .recv = hci_recv_frame },
632 { H4_RECV_SCO, .recv = hci_recv_frame },
633 { H4_RECV_EVENT, .recv = hci_recv_frame },
634 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
635 { BCM_RECV_NULL, .recv = hci_recv_diag },
636 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
637 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
638 };
639
640 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
641 {
642 struct bcm_data *bcm = hu->priv;
643
644 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
645 return -EUNATCH;
646
647 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
648 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
649 if (IS_ERR(bcm->rx_skb)) {
650 int err = PTR_ERR(bcm->rx_skb);
651 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
652 bcm->rx_skb = NULL;
653 return err;
654 } else if (!bcm->rx_skb) {
655 /* Delay auto-suspend when receiving completed packet */
656 mutex_lock(&bcm_device_lock);
657 if (bcm->dev && bcm_device_exists(bcm->dev)) {
658 pm_runtime_get(bcm->dev->dev);
659 pm_runtime_mark_last_busy(bcm->dev->dev);
660 pm_runtime_put_autosuspend(bcm->dev->dev);
661 }
662 mutex_unlock(&bcm_device_lock);
663 }
664
665 return count;
666 }
667
668 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
669 {
670 struct bcm_data *bcm = hu->priv;
671
672 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
673
674 /* Prepend skb with frame type */
675 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
676 skb_queue_tail(&bcm->txq, skb);
677
678 return 0;
679 }
680
681 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
682 {
683 struct bcm_data *bcm = hu->priv;
684 struct sk_buff *skb = NULL;
685 struct bcm_device *bdev = NULL;
686
687 mutex_lock(&bcm_device_lock);
688
689 if (bcm_device_exists(bcm->dev)) {
690 bdev = bcm->dev;
691 pm_runtime_get_sync(bdev->dev);
692 /* Shall be resumed here */
693 }
694
695 skb = skb_dequeue(&bcm->txq);
696
697 if (bdev) {
698 pm_runtime_mark_last_busy(bdev->dev);
699 pm_runtime_put_autosuspend(bdev->dev);
700 }
701
702 mutex_unlock(&bcm_device_lock);
703
704 return skb;
705 }
706
707 #ifdef CONFIG_PM
708 static int bcm_suspend_device(struct device *dev)
709 {
710 struct bcm_device *bdev = dev_get_drvdata(dev);
711 int err;
712
713 bt_dev_dbg(bdev, "");
714
715 if (!bdev->is_suspended && bdev->hu) {
716 hci_uart_set_flow_control(bdev->hu, true);
717
718 /* Once this returns, driver suspends BT via GPIO */
719 bdev->is_suspended = true;
720 }
721
722 /* Suspend the device */
723 err = bdev->set_device_wakeup(bdev, false);
724 if (err) {
725 if (bdev->is_suspended && bdev->hu) {
726 bdev->is_suspended = false;
727 hci_uart_set_flow_control(bdev->hu, false);
728 }
729 return -EBUSY;
730 }
731
732 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
733 msleep(15);
734
735 return 0;
736 }
737
738 static int bcm_resume_device(struct device *dev)
739 {
740 struct bcm_device *bdev = dev_get_drvdata(dev);
741 int err;
742
743 bt_dev_dbg(bdev, "");
744
745 err = bdev->set_device_wakeup(bdev, true);
746 if (err) {
747 dev_err(dev, "Failed to power up\n");
748 return err;
749 }
750
751 bt_dev_dbg(bdev, "resume, delaying 15 ms");
752 msleep(15);
753
754 /* When this executes, the device has woken up already */
755 if (bdev->is_suspended && bdev->hu) {
756 bdev->is_suspended = false;
757
758 hci_uart_set_flow_control(bdev->hu, false);
759 }
760
761 return 0;
762 }
763 #endif
764
765 #ifdef CONFIG_PM_SLEEP
766 /* suspend callback */
767 static int bcm_suspend(struct device *dev)
768 {
769 struct bcm_device *bdev = dev_get_drvdata(dev);
770 int error;
771
772 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
773
774 /*
775 * When used with a device instantiated as platform_device, bcm_suspend
776 * can be called at any time as long as the platform device is bound,
777 * so it should use bcm_device_lock to protect access to hci_uart
778 * and device_wake-up GPIO.
779 */
780 mutex_lock(&bcm_device_lock);
781
782 if (!bdev->hu)
783 goto unlock;
784
785 if (pm_runtime_active(dev))
786 bcm_suspend_device(dev);
787
788 if (device_may_wakeup(dev) && bdev->irq > 0) {
789 error = enable_irq_wake(bdev->irq);
790 if (!error)
791 bt_dev_dbg(bdev, "BCM irq: enabled");
792 }
793
794 unlock:
795 mutex_unlock(&bcm_device_lock);
796
797 return 0;
798 }
799
800 /* resume callback */
801 static int bcm_resume(struct device *dev)
802 {
803 struct bcm_device *bdev = dev_get_drvdata(dev);
804 int err = 0;
805
806 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
807
808 /*
809 * When used with a device instantiated as platform_device, bcm_resume
810 * can be called at any time as long as platform device is bound,
811 * so it should use bcm_device_lock to protect access to hci_uart
812 * and device_wake-up GPIO.
813 */
814 mutex_lock(&bcm_device_lock);
815
816 if (!bdev->hu)
817 goto unlock;
818
819 if (device_may_wakeup(dev) && bdev->irq > 0) {
820 disable_irq_wake(bdev->irq);
821 bt_dev_dbg(bdev, "BCM irq: disabled");
822 }
823
824 err = bcm_resume_device(dev);
825
826 unlock:
827 mutex_unlock(&bcm_device_lock);
828
829 if (!err) {
830 pm_runtime_disable(dev);
831 pm_runtime_set_active(dev);
832 pm_runtime_enable(dev);
833 }
834
835 return 0;
836 }
837 #endif
838
839 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
840 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
841 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
842
843 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
844 { "device-wakeup-gpios", &first_gpio, 1 },
845 { "shutdown-gpios", &second_gpio, 1 },
846 { "host-wakeup-gpios", &third_gpio, 1 },
847 { },
848 };
849
850 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
851 { "host-wakeup-gpios", &first_gpio, 1 },
852 { "device-wakeup-gpios", &second_gpio, 1 },
853 { "shutdown-gpios", &third_gpio, 1 },
854 { },
855 };
856
857 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
858 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
859 {
860 .ident = "Meegopad T08",
861 .matches = {
862 DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
863 "To be filled by OEM."),
864 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
865 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
866 },
867 },
868 { }
869 };
870
871 #ifdef CONFIG_ACPI
872 static int bcm_resource(struct acpi_resource *ares, void *data)
873 {
874 struct bcm_device *dev = data;
875 struct acpi_resource_extended_irq *irq;
876 struct acpi_resource_gpio *gpio;
877 struct acpi_resource_uart_serialbus *sb;
878
879 switch (ares->type) {
880 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
881 irq = &ares->data.extended_irq;
882 if (irq->polarity != ACPI_ACTIVE_LOW)
883 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
884 dev->irq_active_low = true;
885 break;
886
887 case ACPI_RESOURCE_TYPE_GPIO:
888 gpio = &ares->data.gpio;
889 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
890 dev->gpio_int_idx = dev->gpio_count;
891 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
892 }
893 dev->gpio_count++;
894 break;
895
896 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
897 sb = &ares->data.uart_serial_bus;
898 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
899 dev->init_speed = sb->default_baud_rate;
900 dev->oper_speed = 4000000;
901 }
902 break;
903
904 default:
905 break;
906 }
907
908 return 0;
909 }
910
911 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
912 {
913 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
914 return -EIO;
915
916 return 0;
917 }
918
919 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
920 {
921 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
922 NULL, NULL, NULL)))
923 return -EIO;
924
925 return 0;
926 }
927
928 static int bcm_apple_get_resources(struct bcm_device *dev)
929 {
930 struct acpi_device *adev = ACPI_COMPANION(dev->dev);
931 const union acpi_object *obj;
932
933 if (!adev ||
934 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
935 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
936 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
937 return -ENODEV;
938
939 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
940 obj->buffer.length == 8)
941 dev->init_speed = *(u64 *)obj->buffer.pointer;
942
943 dev->set_device_wakeup = bcm_apple_set_device_wakeup;
944 dev->set_shutdown = bcm_apple_set_shutdown;
945
946 return 0;
947 }
948 #else
949 static inline int bcm_apple_get_resources(struct bcm_device *dev)
950 {
951 return -EOPNOTSUPP;
952 }
953 #endif /* CONFIG_ACPI */
954
955 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
956 {
957 gpiod_set_value_cansleep(dev->device_wakeup, awake);
958 return 0;
959 }
960
961 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
962 {
963 gpiod_set_value_cansleep(dev->shutdown, powered);
964 return 0;
965 }
966
967 /* Try a bunch of names for TXCO */
968 static struct clk *bcm_get_txco(struct device *dev)
969 {
970 struct clk *clk;
971
972 /* New explicit name */
973 clk = devm_clk_get(dev, "txco");
974 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
975 return clk;
976
977 /* Deprecated name */
978 clk = devm_clk_get(dev, "extclk");
979 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
980 return clk;
981
982 /* Original code used no name at all */
983 return devm_clk_get(dev, NULL);
984 }
985
986 static int bcm_get_resources(struct bcm_device *dev)
987 {
988 const struct dmi_system_id *dmi_id;
989 int err;
990
991 dev->name = dev_name(dev->dev);
992
993 if (x86_apple_machine && !bcm_apple_get_resources(dev))
994 return 0;
995
996 dev->txco_clk = bcm_get_txco(dev->dev);
997
998 /* Handle deferred probing */
999 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1000 return PTR_ERR(dev->txco_clk);
1001
1002 /* Ignore all other errors as before */
1003 if (IS_ERR(dev->txco_clk))
1004 dev->txco_clk = NULL;
1005
1006 dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1007 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1008 return PTR_ERR(dev->lpo_clk);
1009
1010 if (IS_ERR(dev->lpo_clk))
1011 dev->lpo_clk = NULL;
1012
1013 /* Check if we accidentally fetched the lpo clock twice */
1014 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1015 devm_clk_put(dev->dev, dev->txco_clk);
1016 dev->txco_clk = NULL;
1017 }
1018
1019 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1020 GPIOD_OUT_LOW);
1021 if (IS_ERR(dev->device_wakeup))
1022 return PTR_ERR(dev->device_wakeup);
1023
1024 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1025 GPIOD_OUT_LOW);
1026 if (IS_ERR(dev->shutdown))
1027 return PTR_ERR(dev->shutdown);
1028
1029 dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1030 dev->set_shutdown = bcm_gpio_set_shutdown;
1031
1032 dev->supplies[0].supply = "vbat";
1033 dev->supplies[1].supply = "vddio";
1034 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1035 dev->supplies);
1036 if (err)
1037 return err;
1038
1039 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1040 if (dev->irq <= 0) {
1041 struct gpio_desc *gpio;
1042
1043 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1044 GPIOD_IN);
1045 if (IS_ERR(gpio))
1046 return PTR_ERR(gpio);
1047
1048 dev->irq = gpiod_to_irq(gpio);
1049 }
1050
1051 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1052 if (dmi_id) {
1053 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1054 dmi_id->ident);
1055 dev->irq = 0;
1056 }
1057
1058 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1059 return 0;
1060 }
1061
1062 #ifdef CONFIG_ACPI
1063 static int bcm_acpi_probe(struct bcm_device *dev)
1064 {
1065 LIST_HEAD(resources);
1066 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1067 struct resource_entry *entry;
1068 int ret;
1069
1070 /* Retrieve UART ACPI info */
1071 dev->gpio_int_idx = -1;
1072 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1073 &resources, bcm_resource, dev);
1074 if (ret < 0)
1075 return ret;
1076
1077 resource_list_for_each_entry(entry, &resources) {
1078 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1079 dev->irq = entry->res->start;
1080 break;
1081 }
1082 }
1083 acpi_dev_free_resource_list(&resources);
1084
1085 /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1086 * only 2 GPIO resources, we use the irq-last mapping for this, since
1087 * we already have an irq the 3th / last mapping will not be used.
1088 */
1089 if (dev->irq)
1090 gpio_mapping = acpi_bcm_int_last_gpios;
1091 else if (dev->gpio_int_idx == 0)
1092 gpio_mapping = acpi_bcm_int_first_gpios;
1093 else if (dev->gpio_int_idx == 2)
1094 gpio_mapping = acpi_bcm_int_last_gpios;
1095 else
1096 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1097 dev->gpio_int_idx);
1098
1099 /* Warn if our expectations are not met. */
1100 if (dev->gpio_count != (dev->irq ? 2 : 3))
1101 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1102 dev->gpio_count);
1103
1104 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1105 if (ret)
1106 return ret;
1107
1108 if (irq_polarity != -1) {
1109 dev->irq_active_low = irq_polarity;
1110 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1111 dev->irq_active_low ? "low" : "high");
1112 }
1113
1114 return 0;
1115 }
1116 #else
1117 static int bcm_acpi_probe(struct bcm_device *dev)
1118 {
1119 return -EINVAL;
1120 }
1121 #endif /* CONFIG_ACPI */
1122
1123 static int bcm_of_probe(struct bcm_device *bdev)
1124 {
1125 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1126 return 0;
1127 }
1128
1129 static int bcm_probe(struct platform_device *pdev)
1130 {
1131 struct bcm_device *dev;
1132 int ret;
1133
1134 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1135 if (!dev)
1136 return -ENOMEM;
1137
1138 dev->dev = &pdev->dev;
1139 dev->irq = platform_get_irq(pdev, 0);
1140
1141 if (has_acpi_companion(&pdev->dev)) {
1142 ret = bcm_acpi_probe(dev);
1143 if (ret)
1144 return ret;
1145 }
1146
1147 ret = bcm_get_resources(dev);
1148 if (ret)
1149 return ret;
1150
1151 platform_set_drvdata(pdev, dev);
1152
1153 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1154
1155 /* Place this instance on the device list */
1156 mutex_lock(&bcm_device_lock);
1157 list_add_tail(&dev->list, &bcm_device_list);
1158 mutex_unlock(&bcm_device_lock);
1159
1160 ret = bcm_gpio_set_power(dev, false);
1161 if (ret)
1162 dev_err(&pdev->dev, "Failed to power down\n");
1163
1164 return 0;
1165 }
1166
1167 static int bcm_remove(struct platform_device *pdev)
1168 {
1169 struct bcm_device *dev = platform_get_drvdata(pdev);
1170
1171 mutex_lock(&bcm_device_lock);
1172 list_del(&dev->list);
1173 mutex_unlock(&bcm_device_lock);
1174
1175 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1176
1177 return 0;
1178 }
1179
1180 static const struct hci_uart_proto bcm_proto = {
1181 .id = HCI_UART_BCM,
1182 .name = "Broadcom",
1183 .manufacturer = 15,
1184 .init_speed = 115200,
1185 .open = bcm_open,
1186 .close = bcm_close,
1187 .flush = bcm_flush,
1188 .setup = bcm_setup,
1189 .set_baudrate = bcm_set_baudrate,
1190 .recv = bcm_recv,
1191 .enqueue = bcm_enqueue,
1192 .dequeue = bcm_dequeue,
1193 };
1194
1195 #ifdef CONFIG_ACPI
1196 static const struct acpi_device_id bcm_acpi_match[] = {
1197 { "BCM2E00" },
1198 { "BCM2E01" },
1199 { "BCM2E02" },
1200 { "BCM2E03" },
1201 { "BCM2E04" },
1202 { "BCM2E05" },
1203 { "BCM2E06" },
1204 { "BCM2E07" },
1205 { "BCM2E08" },
1206 { "BCM2E09" },
1207 { "BCM2E0A" },
1208 { "BCM2E0B" },
1209 { "BCM2E0C" },
1210 { "BCM2E0D" },
1211 { "BCM2E0E" },
1212 { "BCM2E0F" },
1213 { "BCM2E10" },
1214 { "BCM2E11" },
1215 { "BCM2E12" },
1216 { "BCM2E13" },
1217 { "BCM2E14" },
1218 { "BCM2E15" },
1219 { "BCM2E16" },
1220 { "BCM2E17" },
1221 { "BCM2E18" },
1222 { "BCM2E19" },
1223 { "BCM2E1A" },
1224 { "BCM2E1B" },
1225 { "BCM2E1C" },
1226 { "BCM2E1D" },
1227 { "BCM2E1F" },
1228 { "BCM2E20" },
1229 { "BCM2E21" },
1230 { "BCM2E22" },
1231 { "BCM2E23" },
1232 { "BCM2E24" },
1233 { "BCM2E25" },
1234 { "BCM2E26" },
1235 { "BCM2E27" },
1236 { "BCM2E28" },
1237 { "BCM2E29" },
1238 { "BCM2E2A" },
1239 { "BCM2E2B" },
1240 { "BCM2E2C" },
1241 { "BCM2E2D" },
1242 { "BCM2E2E" },
1243 { "BCM2E2F" },
1244 { "BCM2E30" },
1245 { "BCM2E31" },
1246 { "BCM2E32" },
1247 { "BCM2E33" },
1248 { "BCM2E34" },
1249 { "BCM2E35" },
1250 { "BCM2E36" },
1251 { "BCM2E37" },
1252 { "BCM2E38" },
1253 { "BCM2E39" },
1254 { "BCM2E3A" },
1255 { "BCM2E3B" },
1256 { "BCM2E3C" },
1257 { "BCM2E3D" },
1258 { "BCM2E3E" },
1259 { "BCM2E3F" },
1260 { "BCM2E40" },
1261 { "BCM2E41" },
1262 { "BCM2E42" },
1263 { "BCM2E43" },
1264 { "BCM2E44" },
1265 { "BCM2E45" },
1266 { "BCM2E46" },
1267 { "BCM2E47" },
1268 { "BCM2E48" },
1269 { "BCM2E49" },
1270 { "BCM2E4A" },
1271 { "BCM2E4B" },
1272 { "BCM2E4C" },
1273 { "BCM2E4D" },
1274 { "BCM2E4E" },
1275 { "BCM2E4F" },
1276 { "BCM2E50" },
1277 { "BCM2E51" },
1278 { "BCM2E52" },
1279 { "BCM2E53" },
1280 { "BCM2E54" },
1281 { "BCM2E55" },
1282 { "BCM2E56" },
1283 { "BCM2E57" },
1284 { "BCM2E58" },
1285 { "BCM2E59" },
1286 { "BCM2E5A" },
1287 { "BCM2E5B" },
1288 { "BCM2E5C" },
1289 { "BCM2E5D" },
1290 { "BCM2E5E" },
1291 { "BCM2E5F" },
1292 { "BCM2E60" },
1293 { "BCM2E61" },
1294 { "BCM2E62" },
1295 { "BCM2E63" },
1296 { "BCM2E64" },
1297 { "BCM2E65" },
1298 { "BCM2E66" },
1299 { "BCM2E67" },
1300 { "BCM2E68" },
1301 { "BCM2E69" },
1302 { "BCM2E6B" },
1303 { "BCM2E6D" },
1304 { "BCM2E6E" },
1305 { "BCM2E6F" },
1306 { "BCM2E70" },
1307 { "BCM2E71" },
1308 { "BCM2E72" },
1309 { "BCM2E73" },
1310 { "BCM2E74" },
1311 { "BCM2E75" },
1312 { "BCM2E76" },
1313 { "BCM2E77" },
1314 { "BCM2E78" },
1315 { "BCM2E79" },
1316 { "BCM2E7A" },
1317 { "BCM2E7B" },
1318 { "BCM2E7C" },
1319 { "BCM2E7D" },
1320 { "BCM2E7E" },
1321 { "BCM2E7F" },
1322 { "BCM2E80" },
1323 { "BCM2E81" },
1324 { "BCM2E82" },
1325 { "BCM2E83" },
1326 { "BCM2E84" },
1327 { "BCM2E85" },
1328 { "BCM2E86" },
1329 { "BCM2E87" },
1330 { "BCM2E88" },
1331 { "BCM2E89" },
1332 { "BCM2E8A" },
1333 { "BCM2E8B" },
1334 { "BCM2E8C" },
1335 { "BCM2E8D" },
1336 { "BCM2E8E" },
1337 { "BCM2E90" },
1338 { "BCM2E92" },
1339 { "BCM2E93" },
1340 { "BCM2E94" },
1341 { "BCM2E95" },
1342 { "BCM2E96" },
1343 { "BCM2E97" },
1344 { "BCM2E98" },
1345 { "BCM2E99" },
1346 { "BCM2E9A" },
1347 { "BCM2E9B" },
1348 { "BCM2E9C" },
1349 { "BCM2E9D" },
1350 { "BCM2EA0" },
1351 { "BCM2EA1" },
1352 { "BCM2EA2" },
1353 { "BCM2EA3" },
1354 { "BCM2EA4" },
1355 { "BCM2EA5" },
1356 { "BCM2EA6" },
1357 { "BCM2EA7" },
1358 { "BCM2EA8" },
1359 { "BCM2EA9" },
1360 { "BCM2EAA" },
1361 { "BCM2EAB" },
1362 { "BCM2EAC" },
1363 { },
1364 };
1365 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1366 #endif
1367
1368 /* suspend and resume callbacks */
1369 static const struct dev_pm_ops bcm_pm_ops = {
1370 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1371 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1372 };
1373
1374 static struct platform_driver bcm_driver = {
1375 .probe = bcm_probe,
1376 .remove = bcm_remove,
1377 .driver = {
1378 .name = "hci_bcm",
1379 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1380 .pm = &bcm_pm_ops,
1381 },
1382 };
1383
1384 static int bcm_serdev_probe(struct serdev_device *serdev)
1385 {
1386 struct bcm_device *bcmdev;
1387 int err;
1388
1389 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1390 if (!bcmdev)
1391 return -ENOMEM;
1392
1393 bcmdev->dev = &serdev->dev;
1394 #ifdef CONFIG_PM
1395 bcmdev->hu = &bcmdev->serdev_hu;
1396 #endif
1397 bcmdev->serdev_hu.serdev = serdev;
1398 serdev_device_set_drvdata(serdev, bcmdev);
1399
1400 if (has_acpi_companion(&serdev->dev))
1401 err = bcm_acpi_probe(bcmdev);
1402 else
1403 err = bcm_of_probe(bcmdev);
1404 if (err)
1405 return err;
1406
1407 err = bcm_get_resources(bcmdev);
1408 if (err)
1409 return err;
1410
1411 if (!bcmdev->shutdown) {
1412 dev_warn(&serdev->dev,
1413 "No reset resource, using default baud rate\n");
1414 bcmdev->oper_speed = bcmdev->init_speed;
1415 }
1416
1417 err = bcm_gpio_set_power(bcmdev, false);
1418 if (err)
1419 dev_err(&serdev->dev, "Failed to power down\n");
1420
1421 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1422 }
1423
1424 static void bcm_serdev_remove(struct serdev_device *serdev)
1425 {
1426 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1427
1428 hci_uart_unregister_device(&bcmdev->serdev_hu);
1429 }
1430
1431 #ifdef CONFIG_OF
1432 static const struct of_device_id bcm_bluetooth_of_match[] = {
1433 { .compatible = "brcm,bcm20702a1" },
1434 { .compatible = "brcm,bcm4330-bt" },
1435 { .compatible = "brcm,bcm43438-bt" },
1436 { },
1437 };
1438 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1439 #endif
1440
1441 static struct serdev_device_driver bcm_serdev_driver = {
1442 .probe = bcm_serdev_probe,
1443 .remove = bcm_serdev_remove,
1444 .driver = {
1445 .name = "hci_uart_bcm",
1446 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1447 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1448 .pm = &bcm_pm_ops,
1449 },
1450 };
1451
1452 int __init bcm_init(void)
1453 {
1454 /* For now, we need to keep both platform device
1455 * driver (ACPI generated) and serdev driver (DT).
1456 */
1457 platform_driver_register(&bcm_driver);
1458 serdev_device_driver_register(&bcm_serdev_driver);
1459
1460 return hci_uart_register_proto(&bcm_proto);
1461 }
1462
1463 int __exit bcm_deinit(void)
1464 {
1465 platform_driver_unregister(&bcm_driver);
1466 serdev_device_driver_unregister(&bcm_serdev_driver);
1467
1468 return hci_uart_unregister_proto(&bcm_proto);
1469 }
Linux with added FPC-III support