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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / bluetooth / hci_bcm.c
blobb236cb11c0dcce208fe6567479f6a423f74c3514
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/of_irq.h>
17 #include <linux/property.h>
18 #include <linux/platform_data/x86/apple.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/consumer.h>
21 #include <linux/clk.h>
22 #include <linux/gpio/consumer.h>
23 #include <linux/tty.h>
24 #include <linux/interrupt.h>
25 #include <linux/dmi.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/serdev.h>
28
29 #include <net/bluetooth/bluetooth.h>
30 #include <net/bluetooth/hci_core.h>
31
32 #include "btbcm.h"
33 #include "hci_uart.h"
34
35 #define BCM_NULL_PKT 0x00
36 #define BCM_NULL_SIZE 0
37
38 #define BCM_LM_DIAG_PKT 0x07
39 #define BCM_LM_DIAG_SIZE 63
40
41 #define BCM_TYPE49_PKT 0x31
42 #define BCM_TYPE49_SIZE 0
43
44 #define BCM_TYPE52_PKT 0x34
45 #define BCM_TYPE52_SIZE 0
46
47 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
48
49 #define BCM_NUM_SUPPLIES 2
50
51 /**
52 * struct bcm_device_data - device specific data
53 * @no_early_set_baudrate: Disallow set baudrate before driver setup()
54 */
55 struct bcm_device_data {
56 bool no_early_set_baudrate;
57 bool drive_rts_on_open;
58 };
59
60 /**
61 * struct bcm_device - device driver resources
62 * @serdev_hu: HCI UART controller struct
63 * @list: bcm_device_list node
64 * @dev: physical UART slave
65 * @name: device name logged by bt_dev_*() functions
66 * @device_wakeup: BT_WAKE pin,
67 * assert = Bluetooth device must wake up or remain awake,
68 * deassert = Bluetooth device may sleep when sleep criteria are met
69 * @shutdown: BT_REG_ON pin,
70 * power up or power down Bluetooth device internal regulators
71 * @set_device_wakeup: callback to toggle BT_WAKE pin
72 * either by accessing @device_wakeup or by calling @btlp
73 * @set_shutdown: callback to toggle BT_REG_ON pin
74 * either by accessing @shutdown or by calling @btpu/@btpd
75 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
76 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
77 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
78 * @txco_clk: external reference frequency clock used by Bluetooth device
79 * @lpo_clk: external LPO clock used by Bluetooth device
80 * @supplies: VBAT and VDDIO supplies used by Bluetooth device
81 * @res_enabled: whether clocks and supplies are prepared and enabled
82 * @init_speed: default baudrate of Bluetooth device;
83 * the host UART is initially set to this baudrate so that
84 * it can configure the Bluetooth device for @oper_speed
85 * @oper_speed: preferred baudrate of Bluetooth device;
86 * set to 0 if @init_speed is already the preferred baudrate
87 * @irq: interrupt triggered by HOST_WAKE_BT pin
88 * @irq_active_low: whether @irq is active low
89 * @hu: pointer to HCI UART controller struct,
90 * used to disable flow control during runtime suspend and system sleep
91 * @is_suspended: whether flow control is currently disabled
92 * @no_early_set_baudrate: don't set_baudrate before setup()
93 */
94 struct bcm_device {
95 /* Must be the first member, hci_serdev.c expects this. */
96 struct hci_uart serdev_hu;
97 struct list_head list;
98
99 struct device *dev;
100
101 const char *name;
102 struct gpio_desc *device_wakeup;
103 struct gpio_desc *shutdown;
104 int (*set_device_wakeup)(struct bcm_device *, bool);
105 int (*set_shutdown)(struct bcm_device *, bool);
106 #ifdef CONFIG_ACPI
107 acpi_handle btlp, btpu, btpd;
108 int gpio_count;
109 int gpio_int_idx;
110 #endif
111
112 struct clk *txco_clk;
113 struct clk *lpo_clk;
114 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
115 bool res_enabled;
116
117 u32 init_speed;
118 u32 oper_speed;
119 int irq;
120 bool irq_active_low;
121
122 #ifdef CONFIG_PM
123 struct hci_uart *hu;
124 bool is_suspended;
125 #endif
126 bool no_early_set_baudrate;
127 bool drive_rts_on_open;
128 u8 pcm_int_params[5];
129 };
130
131 /* generic bcm uart resources */
132 struct bcm_data {
133 struct sk_buff *rx_skb;
134 struct sk_buff_head txq;
135
136 struct bcm_device *dev;
137 };
138
139 /* List of BCM BT UART devices */
140 static DEFINE_MUTEX(bcm_device_lock);
141 static LIST_HEAD(bcm_device_list);
142
143 static int irq_polarity = -1;
144 module_param(irq_polarity, int, 0444);
145 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
146
147 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
148 {
149 if (hu->serdev)
150 serdev_device_set_baudrate(hu->serdev, speed);
151 else
152 hci_uart_set_baudrate(hu, speed);
153 }
154
155 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
156 {
157 struct hci_dev *hdev = hu->hdev;
158 struct sk_buff *skb;
159 struct bcm_update_uart_baud_rate param;
160
161 if (speed > 3000000) {
162 struct bcm_write_uart_clock_setting clock;
163
164 clock.type = BCM_UART_CLOCK_48MHZ;
165
166 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
167
168 /* This Broadcom specific command changes the UART's controller
169 * clock for baud rate > 3000000.
170 */
171 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
172 if (IS_ERR(skb)) {
173 int err = PTR_ERR(skb);
174 bt_dev_err(hdev, "BCM: failed to write clock (%d)",
175 err);
176 return err;
177 }
178
179 kfree_skb(skb);
180 }
181
182 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
183
184 param.zero = cpu_to_le16(0);
185 param.baud_rate = cpu_to_le32(speed);
186
187 /* This Broadcom specific command changes the UART's controller baud
188 * rate.
189 */
190 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
191 HCI_INIT_TIMEOUT);
192 if (IS_ERR(skb)) {
193 int err = PTR_ERR(skb);
194 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
195 err);
196 return err;
197 }
198
199 kfree_skb(skb);
200
201 return 0;
202 }
203
204 /* bcm_device_exists should be protected by bcm_device_lock */
205 static bool bcm_device_exists(struct bcm_device *device)
206 {
207 struct list_head *p;
208
209 #ifdef CONFIG_PM
210 /* Devices using serdev always exist */
211 if (device && device->hu && device->hu->serdev)
212 return true;
213 #endif
214
215 list_for_each(p, &bcm_device_list) {
216 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
217
218 if (device == dev)
219 return true;
220 }
221
222 return false;
223 }
224
225 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
226 {
227 int err;
228
229 if (powered && !dev->res_enabled) {
230 /* Intel Macs use bcm_apple_get_resources() and don't
231 * have regulator supplies configured.
232 */
233 if (dev->supplies[0].supply) {
234 err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
235 dev->supplies);
236 if (err)
237 return err;
238 }
239
240 /* LPO clock needs to be 32.768 kHz */
241 err = clk_set_rate(dev->lpo_clk, 32768);
242 if (err) {
243 dev_err(dev->dev, "Could not set LPO clock rate\n");
244 goto err_regulator_disable;
245 }
246
247 err = clk_prepare_enable(dev->lpo_clk);
248 if (err)
249 goto err_regulator_disable;
250
251 err = clk_prepare_enable(dev->txco_clk);
252 if (err)
253 goto err_lpo_clk_disable;
254 }
255
256 err = dev->set_shutdown(dev, powered);
257 if (err)
258 goto err_txco_clk_disable;
259
260 err = dev->set_device_wakeup(dev, powered);
261 if (err)
262 goto err_revert_shutdown;
263
264 if (!powered && dev->res_enabled) {
265 clk_disable_unprepare(dev->txco_clk);
266 clk_disable_unprepare(dev->lpo_clk);
267
268 /* Intel Macs use bcm_apple_get_resources() and don't
269 * have regulator supplies configured.
270 */
271 if (dev->supplies[0].supply)
272 regulator_bulk_disable(BCM_NUM_SUPPLIES,
273 dev->supplies);
274 }
275
276 /* wait for device to power on and come out of reset */
277 usleep_range(100000, 120000);
278
279 dev->res_enabled = powered;
280
281 return 0;
282
283 err_revert_shutdown:
284 dev->set_shutdown(dev, !powered);
285 err_txco_clk_disable:
286 if (powered && !dev->res_enabled)
287 clk_disable_unprepare(dev->txco_clk);
288 err_lpo_clk_disable:
289 if (powered && !dev->res_enabled)
290 clk_disable_unprepare(dev->lpo_clk);
291 err_regulator_disable:
292 if (powered && !dev->res_enabled)
293 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
294 return err;
295 }
296
297 #ifdef CONFIG_PM
298 static irqreturn_t bcm_host_wake(int irq, void *data)
299 {
300 struct bcm_device *bdev = data;
301
302 bt_dev_dbg(bdev, "Host wake IRQ");
303
304 pm_runtime_get(bdev->dev);
305 pm_runtime_mark_last_busy(bdev->dev);
306 pm_runtime_put_autosuspend(bdev->dev);
307
308 return IRQ_HANDLED;
309 }
310
311 static int bcm_request_irq(struct bcm_data *bcm)
312 {
313 struct bcm_device *bdev = bcm->dev;
314 int err;
315
316 mutex_lock(&bcm_device_lock);
317 if (!bcm_device_exists(bdev)) {
318 err = -ENODEV;
319 goto unlock;
320 }
321
322 if (bdev->irq <= 0) {
323 err = -EOPNOTSUPP;
324 goto unlock;
325 }
326
327 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
328 bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
329 IRQF_TRIGGER_RISING,
330 "host_wake", bdev);
331 if (err) {
332 bdev->irq = err;
333 goto unlock;
334 }
335
336 device_init_wakeup(bdev->dev, true);
337
338 pm_runtime_set_autosuspend_delay(bdev->dev,
339 BCM_AUTOSUSPEND_DELAY);
340 pm_runtime_use_autosuspend(bdev->dev);
341 pm_runtime_set_active(bdev->dev);
342 pm_runtime_enable(bdev->dev);
343
344 unlock:
345 mutex_unlock(&bcm_device_lock);
346
347 return err;
348 }
349
350 static const struct bcm_set_sleep_mode default_sleep_params = {
351 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
352 .idle_host = 2, /* idle threshold HOST, in 300ms */
353 .idle_dev = 2, /* idle threshold device, in 300ms */
354 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
355 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
356 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
357 .combine_modes = 1, /* Combine sleep and LPM flag */
358 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
359 /* Irrelevant USB flags */
360 .usb_auto_sleep = 0,
361 .usb_resume_timeout = 0,
362 .break_to_host = 0,
363 .pulsed_host_wake = 1,
364 };
365
366 static int bcm_setup_sleep(struct hci_uart *hu)
367 {
368 struct bcm_data *bcm = hu->priv;
369 struct sk_buff *skb;
370 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
371
372 sleep_params.host_wake_active = !bcm->dev->irq_active_low;
373
374 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
375 &sleep_params, HCI_INIT_TIMEOUT);
376 if (IS_ERR(skb)) {
377 int err = PTR_ERR(skb);
378 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
379 return err;
380 }
381 kfree_skb(skb);
382
383 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
384
385 return 0;
386 }
387 #else
388 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
389 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
390 #endif
391
392 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
393 {
394 struct hci_uart *hu = hci_get_drvdata(hdev);
395 struct bcm_data *bcm = hu->priv;
396 struct sk_buff *skb;
397
398 if (!test_bit(HCI_RUNNING, &hdev->flags))
399 return -ENETDOWN;
400
401 skb = bt_skb_alloc(3, GFP_KERNEL);
402 if (!skb)
403 return -ENOMEM;
404
405 skb_put_u8(skb, BCM_LM_DIAG_PKT);
406 skb_put_u8(skb, 0xf0);
407 skb_put_u8(skb, enable);
408
409 skb_queue_tail(&bcm->txq, skb);
410 hci_uart_tx_wakeup(hu);
411
412 return 0;
413 }
414
415 static int bcm_open(struct hci_uart *hu)
416 {
417 struct bcm_data *bcm;
418 struct list_head *p;
419 int err;
420
421 bt_dev_dbg(hu->hdev, "hu %p", hu);
422
423 if (!hci_uart_has_flow_control(hu))
424 return -EOPNOTSUPP;
425
426 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
427 if (!bcm)
428 return -ENOMEM;
429
430 skb_queue_head_init(&bcm->txq);
431
432 hu->priv = bcm;
433
434 mutex_lock(&bcm_device_lock);
435
436 if (hu->serdev) {
437 bcm->dev = serdev_device_get_drvdata(hu->serdev);
438 goto out;
439 }
440
441 if (!hu->tty->dev)
442 goto out;
443
444 list_for_each(p, &bcm_device_list) {
445 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
446
447 /* Retrieve saved bcm_device based on parent of the
448 * platform device (saved during device probe) and
449 * parent of tty device used by hci_uart
450 */
451 if (hu->tty->dev->parent == dev->dev->parent) {
452 bcm->dev = dev;
453 #ifdef CONFIG_PM
454 dev->hu = hu;
455 #endif
456 break;
457 }
458 }
459
460 out:
461 if (bcm->dev) {
462 if (bcm->dev->drive_rts_on_open)
463 hci_uart_set_flow_control(hu, true);
464
465 hu->init_speed = bcm->dev->init_speed;
466
467 /* If oper_speed is set, ldisc/serdev will set the baudrate
468 * before calling setup()
469 */
470 if (!bcm->dev->no_early_set_baudrate)
471 hu->oper_speed = bcm->dev->oper_speed;
472
473 err = bcm_gpio_set_power(bcm->dev, true);
474
475 if (bcm->dev->drive_rts_on_open)
476 hci_uart_set_flow_control(hu, false);
477
478 if (err)
479 goto err_unset_hu;
480 }
481
482 mutex_unlock(&bcm_device_lock);
483 return 0;
484
485 err_unset_hu:
486 #ifdef CONFIG_PM
487 if (!hu->serdev)
488 bcm->dev->hu = NULL;
489 #endif
490 mutex_unlock(&bcm_device_lock);
491 hu->priv = NULL;
492 kfree(bcm);
493 return err;
494 }
495
496 static int bcm_close(struct hci_uart *hu)
497 {
498 struct bcm_data *bcm = hu->priv;
499 struct bcm_device *bdev = NULL;
500 int err;
501
502 bt_dev_dbg(hu->hdev, "hu %p", hu);
503
504 /* Protect bcm->dev against removal of the device or driver */
505 mutex_lock(&bcm_device_lock);
506
507 if (hu->serdev) {
508 bdev = serdev_device_get_drvdata(hu->serdev);
509 } else if (bcm_device_exists(bcm->dev)) {
510 bdev = bcm->dev;
511 #ifdef CONFIG_PM
512 bdev->hu = NULL;
513 #endif
514 }
515
516 if (bdev) {
517 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
518 devm_free_irq(bdev->dev, bdev->irq, bdev);
519 device_init_wakeup(bdev->dev, false);
520 pm_runtime_disable(bdev->dev);
521 }
522
523 err = bcm_gpio_set_power(bdev, false);
524 if (err)
525 bt_dev_err(hu->hdev, "Failed to power down");
526 else
527 pm_runtime_set_suspended(bdev->dev);
528 }
529 mutex_unlock(&bcm_device_lock);
530
531 skb_queue_purge(&bcm->txq);
532 kfree_skb(bcm->rx_skb);
533 kfree(bcm);
534
535 hu->priv = NULL;
536 return 0;
537 }
538
539 static int bcm_flush(struct hci_uart *hu)
540 {
541 struct bcm_data *bcm = hu->priv;
542
543 bt_dev_dbg(hu->hdev, "hu %p", hu);
544
545 skb_queue_purge(&bcm->txq);
546
547 return 0;
548 }
549
550 static int bcm_setup(struct hci_uart *hu)
551 {
552 struct bcm_data *bcm = hu->priv;
553 char fw_name[64];
554 const struct firmware *fw;
555 unsigned int speed;
556 int err;
557
558 bt_dev_dbg(hu->hdev, "hu %p", hu);
559
560 hu->hdev->set_diag = bcm_set_diag;
561 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
562
563 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
564 if (err)
565 return err;
566
567 err = request_firmware(&fw, fw_name, &hu->hdev->dev);
568 if (err < 0) {
569 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
570 return 0;
571 }
572
573 err = btbcm_patchram(hu->hdev, fw);
574 if (err) {
575 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
576 goto finalize;
577 }
578
579 /* Init speed if any */
580 if (hu->init_speed)
581 speed = hu->init_speed;
582 else if (hu->proto->init_speed)
583 speed = hu->proto->init_speed;
584 else
585 speed = 0;
586
587 if (speed)
588 host_set_baudrate(hu, speed);
589
590 /* Operational speed if any */
591 if (hu->oper_speed)
592 speed = hu->oper_speed;
593 else if (bcm->dev && bcm->dev->oper_speed)
594 speed = bcm->dev->oper_speed;
595 else if (hu->proto->oper_speed)
596 speed = hu->proto->oper_speed;
597 else
598 speed = 0;
599
600 if (speed) {
601 err = bcm_set_baudrate(hu, speed);
602 if (!err)
603 host_set_baudrate(hu, speed);
604 }
605
606 /* PCM parameters if provided */
607 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
608 struct bcm_set_pcm_int_params params;
609
610 btbcm_read_pcm_int_params(hu->hdev, &params);
611
612 memcpy(&params, bcm->dev->pcm_int_params, 5);
613 btbcm_write_pcm_int_params(hu->hdev, &params);
614 }
615
616 finalize:
617 release_firmware(fw);
618
619 err = btbcm_finalize(hu->hdev);
620 if (err)
621 return err;
622
623 if (!bcm_request_irq(bcm))
624 err = bcm_setup_sleep(hu);
625
626 return err;
627 }
628
629 #define BCM_RECV_LM_DIAG \
630 .type = BCM_LM_DIAG_PKT, \
631 .hlen = BCM_LM_DIAG_SIZE, \
632 .loff = 0, \
633 .lsize = 0, \
634 .maxlen = BCM_LM_DIAG_SIZE
635
636 #define BCM_RECV_NULL \
637 .type = BCM_NULL_PKT, \
638 .hlen = BCM_NULL_SIZE, \
639 .loff = 0, \
640 .lsize = 0, \
641 .maxlen = BCM_NULL_SIZE
642
643 #define BCM_RECV_TYPE49 \
644 .type = BCM_TYPE49_PKT, \
645 .hlen = BCM_TYPE49_SIZE, \
646 .loff = 0, \
647 .lsize = 0, \
648 .maxlen = BCM_TYPE49_SIZE
649
650 #define BCM_RECV_TYPE52 \
651 .type = BCM_TYPE52_PKT, \
652 .hlen = BCM_TYPE52_SIZE, \
653 .loff = 0, \
654 .lsize = 0, \
655 .maxlen = BCM_TYPE52_SIZE
656
657 static const struct h4_recv_pkt bcm_recv_pkts[] = {
658 { H4_RECV_ACL, .recv = hci_recv_frame },
659 { H4_RECV_SCO, .recv = hci_recv_frame },
660 { H4_RECV_EVENT, .recv = hci_recv_frame },
661 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
662 { BCM_RECV_NULL, .recv = hci_recv_diag },
663 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
664 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
665 };
666
667 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
668 {
669 struct bcm_data *bcm = hu->priv;
670
671 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
672 return -EUNATCH;
673
674 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
675 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
676 if (IS_ERR(bcm->rx_skb)) {
677 int err = PTR_ERR(bcm->rx_skb);
678 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
679 bcm->rx_skb = NULL;
680 return err;
681 } else if (!bcm->rx_skb) {
682 /* Delay auto-suspend when receiving completed packet */
683 mutex_lock(&bcm_device_lock);
684 if (bcm->dev && bcm_device_exists(bcm->dev)) {
685 pm_runtime_get(bcm->dev->dev);
686 pm_runtime_mark_last_busy(bcm->dev->dev);
687 pm_runtime_put_autosuspend(bcm->dev->dev);
688 }
689 mutex_unlock(&bcm_device_lock);
690 }
691
692 return count;
693 }
694
695 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
696 {
697 struct bcm_data *bcm = hu->priv;
698
699 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
700
701 /* Prepend skb with frame type */
702 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
703 skb_queue_tail(&bcm->txq, skb);
704
705 return 0;
706 }
707
708 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
709 {
710 struct bcm_data *bcm = hu->priv;
711 struct sk_buff *skb = NULL;
712 struct bcm_device *bdev = NULL;
713
714 mutex_lock(&bcm_device_lock);
715
716 if (bcm_device_exists(bcm->dev)) {
717 bdev = bcm->dev;
718 pm_runtime_get_sync(bdev->dev);
719 /* Shall be resumed here */
720 }
721
722 skb = skb_dequeue(&bcm->txq);
723
724 if (bdev) {
725 pm_runtime_mark_last_busy(bdev->dev);
726 pm_runtime_put_autosuspend(bdev->dev);
727 }
728
729 mutex_unlock(&bcm_device_lock);
730
731 return skb;
732 }
733
734 #ifdef CONFIG_PM
735 static int bcm_suspend_device(struct device *dev)
736 {
737 struct bcm_device *bdev = dev_get_drvdata(dev);
738 int err;
739
740 bt_dev_dbg(bdev, "");
741
742 if (!bdev->is_suspended && bdev->hu) {
743 hci_uart_set_flow_control(bdev->hu, true);
744
745 /* Once this returns, driver suspends BT via GPIO */
746 bdev->is_suspended = true;
747 }
748
749 /* Suspend the device */
750 err = bdev->set_device_wakeup(bdev, false);
751 if (err) {
752 if (bdev->is_suspended && bdev->hu) {
753 bdev->is_suspended = false;
754 hci_uart_set_flow_control(bdev->hu, false);
755 }
756 return -EBUSY;
757 }
758
759 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
760 msleep(15);
761
762 return 0;
763 }
764
765 static int bcm_resume_device(struct device *dev)
766 {
767 struct bcm_device *bdev = dev_get_drvdata(dev);
768 int err;
769
770 bt_dev_dbg(bdev, "");
771
772 err = bdev->set_device_wakeup(bdev, true);
773 if (err) {
774 dev_err(dev, "Failed to power up\n");
775 return err;
776 }
777
778 bt_dev_dbg(bdev, "resume, delaying 15 ms");
779 msleep(15);
780
781 /* When this executes, the device has woken up already */
782 if (bdev->is_suspended && bdev->hu) {
783 bdev->is_suspended = false;
784
785 hci_uart_set_flow_control(bdev->hu, false);
786 }
787
788 return 0;
789 }
790 #endif
791
792 #ifdef CONFIG_PM_SLEEP
793 /* suspend callback */
794 static int bcm_suspend(struct device *dev)
795 {
796 struct bcm_device *bdev = dev_get_drvdata(dev);
797 int error;
798
799 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
800
801 /*
802 * When used with a device instantiated as platform_device, bcm_suspend
803 * can be called at any time as long as the platform device is bound,
804 * so it should use bcm_device_lock to protect access to hci_uart
805 * and device_wake-up GPIO.
806 */
807 mutex_lock(&bcm_device_lock);
808
809 if (!bdev->hu)
810 goto unlock;
811
812 if (pm_runtime_active(dev))
813 bcm_suspend_device(dev);
814
815 if (device_may_wakeup(dev) && bdev->irq > 0) {
816 error = enable_irq_wake(bdev->irq);
817 if (!error)
818 bt_dev_dbg(bdev, "BCM irq: enabled");
819 }
820
821 unlock:
822 mutex_unlock(&bcm_device_lock);
823
824 return 0;
825 }
826
827 /* resume callback */
828 static int bcm_resume(struct device *dev)
829 {
830 struct bcm_device *bdev = dev_get_drvdata(dev);
831 int err = 0;
832
833 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
834
835 /*
836 * When used with a device instantiated as platform_device, bcm_resume
837 * can be called at any time as long as platform device is bound,
838 * so it should use bcm_device_lock to protect access to hci_uart
839 * and device_wake-up GPIO.
840 */
841 mutex_lock(&bcm_device_lock);
842
843 if (!bdev->hu)
844 goto unlock;
845
846 if (device_may_wakeup(dev) && bdev->irq > 0) {
847 disable_irq_wake(bdev->irq);
848 bt_dev_dbg(bdev, "BCM irq: disabled");
849 }
850
851 err = bcm_resume_device(dev);
852
853 unlock:
854 mutex_unlock(&bcm_device_lock);
855
856 if (!err) {
857 pm_runtime_disable(dev);
858 pm_runtime_set_active(dev);
859 pm_runtime_enable(dev);
860 }
861
862 return 0;
863 }
864 #endif
865
866 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
867 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
868 {
869 .ident = "Meegopad T08",
870 .matches = {
871 DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
872 "To be filled by OEM."),
873 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
874 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
875 },
876 },
877 { }
878 };
879
880 #ifdef CONFIG_ACPI
881 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
882 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
883 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
884
885 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
886 { "device-wakeup-gpios", &first_gpio, 1 },
887 { "shutdown-gpios", &second_gpio, 1 },
888 { "host-wakeup-gpios", &third_gpio, 1 },
889 { },
890 };
891
892 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
893 { "host-wakeup-gpios", &first_gpio, 1 },
894 { "device-wakeup-gpios", &second_gpio, 1 },
895 { "shutdown-gpios", &third_gpio, 1 },
896 { },
897 };
898
899 static int bcm_resource(struct acpi_resource *ares, void *data)
900 {
901 struct bcm_device *dev = data;
902 struct acpi_resource_extended_irq *irq;
903 struct acpi_resource_gpio *gpio;
904 struct acpi_resource_uart_serialbus *sb;
905
906 switch (ares->type) {
907 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
908 irq = &ares->data.extended_irq;
909 if (irq->polarity != ACPI_ACTIVE_LOW)
910 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
911 dev->irq_active_low = true;
912 break;
913
914 case ACPI_RESOURCE_TYPE_GPIO:
915 gpio = &ares->data.gpio;
916 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
917 dev->gpio_int_idx = dev->gpio_count;
918 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
919 }
920 dev->gpio_count++;
921 break;
922
923 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
924 sb = &ares->data.uart_serial_bus;
925 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
926 dev->init_speed = sb->default_baud_rate;
927 dev->oper_speed = 4000000;
928 }
929 break;
930
931 default:
932 break;
933 }
934
935 return 0;
936 }
937
938 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
939 {
940 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
941 return -EIO;
942
943 return 0;
944 }
945
946 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
947 {
948 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
949 NULL, NULL, NULL)))
950 return -EIO;
951
952 return 0;
953 }
954
955 static int bcm_apple_get_resources(struct bcm_device *dev)
956 {
957 struct acpi_device *adev = ACPI_COMPANION(dev->dev);
958 const union acpi_object *obj;
959
960 if (!adev ||
961 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
962 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
963 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
964 return -ENODEV;
965
966 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
967 obj->buffer.length == 8)
968 dev->init_speed = *(u64 *)obj->buffer.pointer;
969
970 dev->set_device_wakeup = bcm_apple_set_device_wakeup;
971 dev->set_shutdown = bcm_apple_set_shutdown;
972
973 return 0;
974 }
975 #else
976 static inline int bcm_apple_get_resources(struct bcm_device *dev)
977 {
978 return -EOPNOTSUPP;
979 }
980 #endif /* CONFIG_ACPI */
981
982 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
983 {
984 gpiod_set_value_cansleep(dev->device_wakeup, awake);
985 return 0;
986 }
987
988 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
989 {
990 gpiod_set_value_cansleep(dev->shutdown, powered);
991 return 0;
992 }
993
994 /* Try a bunch of names for TXCO */
995 static struct clk *bcm_get_txco(struct device *dev)
996 {
997 struct clk *clk;
998
999 /* New explicit name */
1000 clk = devm_clk_get(dev, "txco");
1001 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1002 return clk;
1003
1004 /* Deprecated name */
1005 clk = devm_clk_get(dev, "extclk");
1006 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1007 return clk;
1008
1009 /* Original code used no name at all */
1010 return devm_clk_get(dev, NULL);
1011 }
1012
1013 static int bcm_get_resources(struct bcm_device *dev)
1014 {
1015 const struct dmi_system_id *dmi_id;
1016 int err;
1017
1018 dev->name = dev_name(dev->dev);
1019
1020 if (x86_apple_machine && !bcm_apple_get_resources(dev))
1021 return 0;
1022
1023 dev->txco_clk = bcm_get_txco(dev->dev);
1024
1025 /* Handle deferred probing */
1026 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1027 return PTR_ERR(dev->txco_clk);
1028
1029 /* Ignore all other errors as before */
1030 if (IS_ERR(dev->txco_clk))
1031 dev->txco_clk = NULL;
1032
1033 dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1034 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1035 return PTR_ERR(dev->lpo_clk);
1036
1037 if (IS_ERR(dev->lpo_clk))
1038 dev->lpo_clk = NULL;
1039
1040 /* Check if we accidentally fetched the lpo clock twice */
1041 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1042 devm_clk_put(dev->dev, dev->txco_clk);
1043 dev->txco_clk = NULL;
1044 }
1045
1046 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1047 GPIOD_OUT_LOW);
1048 if (IS_ERR(dev->device_wakeup))
1049 return PTR_ERR(dev->device_wakeup);
1050
1051 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1052 GPIOD_OUT_LOW);
1053 if (IS_ERR(dev->shutdown))
1054 return PTR_ERR(dev->shutdown);
1055
1056 dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1057 dev->set_shutdown = bcm_gpio_set_shutdown;
1058
1059 dev->supplies[0].supply = "vbat";
1060 dev->supplies[1].supply = "vddio";
1061 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1062 dev->supplies);
1063 if (err)
1064 return err;
1065
1066 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1067 if (dev->irq <= 0) {
1068 struct gpio_desc *gpio;
1069
1070 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1071 GPIOD_IN);
1072 if (IS_ERR(gpio))
1073 return PTR_ERR(gpio);
1074
1075 dev->irq = gpiod_to_irq(gpio);
1076 }
1077
1078 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1079 if (dmi_id) {
1080 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1081 dmi_id->ident);
1082 dev->irq = 0;
1083 }
1084
1085 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1086 return 0;
1087 }
1088
1089 #ifdef CONFIG_ACPI
1090 static int bcm_acpi_probe(struct bcm_device *dev)
1091 {
1092 LIST_HEAD(resources);
1093 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1094 struct resource_entry *entry;
1095 int ret;
1096
1097 /* Retrieve UART ACPI info */
1098 dev->gpio_int_idx = -1;
1099 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1100 &resources, bcm_resource, dev);
1101 if (ret < 0)
1102 return ret;
1103
1104 resource_list_for_each_entry(entry, &resources) {
1105 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1106 dev->irq = entry->res->start;
1107 break;
1108 }
1109 }
1110 acpi_dev_free_resource_list(&resources);
1111
1112 /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1113 * only 2 GPIO resources, we use the irq-last mapping for this, since
1114 * we already have an irq the 3th / last mapping will not be used.
1115 */
1116 if (dev->irq)
1117 gpio_mapping = acpi_bcm_int_last_gpios;
1118 else if (dev->gpio_int_idx == 0)
1119 gpio_mapping = acpi_bcm_int_first_gpios;
1120 else if (dev->gpio_int_idx == 2)
1121 gpio_mapping = acpi_bcm_int_last_gpios;
1122 else
1123 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1124 dev->gpio_int_idx);
1125
1126 /* Warn if our expectations are not met. */
1127 if (dev->gpio_count != (dev->irq ? 2 : 3))
1128 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1129 dev->gpio_count);
1130
1131 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1132 if (ret)
1133 return ret;
1134
1135 if (irq_polarity != -1) {
1136 dev->irq_active_low = irq_polarity;
1137 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1138 dev->irq_active_low ? "low" : "high");
1139 }
1140
1141 return 0;
1142 }
1143 #else
1144 static int bcm_acpi_probe(struct bcm_device *dev)
1145 {
1146 return -EINVAL;
1147 }
1148 #endif /* CONFIG_ACPI */
1149
1150 static int bcm_of_probe(struct bcm_device *bdev)
1151 {
1152 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1153 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1154 bdev->pcm_int_params, 5);
1155 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1156
1157 return 0;
1158 }
1159
1160 static int bcm_probe(struct platform_device *pdev)
1161 {
1162 struct bcm_device *dev;
1163 int ret;
1164
1165 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1166 if (!dev)
1167 return -ENOMEM;
1168
1169 dev->dev = &pdev->dev;
1170 dev->irq = platform_get_irq(pdev, 0);
1171
1172 /* Initialize routing field to an unused value */
1173 dev->pcm_int_params[0] = 0xff;
1174
1175 if (has_acpi_companion(&pdev->dev)) {
1176 ret = bcm_acpi_probe(dev);
1177 if (ret)
1178 return ret;
1179 }
1180
1181 ret = bcm_get_resources(dev);
1182 if (ret)
1183 return ret;
1184
1185 platform_set_drvdata(pdev, dev);
1186
1187 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1188
1189 /* Place this instance on the device list */
1190 mutex_lock(&bcm_device_lock);
1191 list_add_tail(&dev->list, &bcm_device_list);
1192 mutex_unlock(&bcm_device_lock);
1193
1194 ret = bcm_gpio_set_power(dev, false);
1195 if (ret)
1196 dev_err(&pdev->dev, "Failed to power down\n");
1197
1198 return 0;
1199 }
1200
1201 static int bcm_remove(struct platform_device *pdev)
1202 {
1203 struct bcm_device *dev = platform_get_drvdata(pdev);
1204
1205 mutex_lock(&bcm_device_lock);
1206 list_del(&dev->list);
1207 mutex_unlock(&bcm_device_lock);
1208
1209 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1210
1211 return 0;
1212 }
1213
1214 static const struct hci_uart_proto bcm_proto = {
1215 .id = HCI_UART_BCM,
1216 .name = "Broadcom",
1217 .manufacturer = 15,
1218 .init_speed = 115200,
1219 .open = bcm_open,
1220 .close = bcm_close,
1221 .flush = bcm_flush,
1222 .setup = bcm_setup,
1223 .set_baudrate = bcm_set_baudrate,
1224 .recv = bcm_recv,
1225 .enqueue = bcm_enqueue,
1226 .dequeue = bcm_dequeue,
1227 };
1228
1229 #ifdef CONFIG_ACPI
1230 static const struct acpi_device_id bcm_acpi_match[] = {
1231 { "BCM2E00" },
1232 { "BCM2E01" },
1233 { "BCM2E02" },
1234 { "BCM2E03" },
1235 { "BCM2E04" },
1236 { "BCM2E05" },
1237 { "BCM2E06" },
1238 { "BCM2E07" },
1239 { "BCM2E08" },
1240 { "BCM2E09" },
1241 { "BCM2E0A" },
1242 { "BCM2E0B" },
1243 { "BCM2E0C" },
1244 { "BCM2E0D" },
1245 { "BCM2E0E" },
1246 { "BCM2E0F" },
1247 { "BCM2E10" },
1248 { "BCM2E11" },
1249 { "BCM2E12" },
1250 { "BCM2E13" },
1251 { "BCM2E14" },
1252 { "BCM2E15" },
1253 { "BCM2E16" },
1254 { "BCM2E17" },
1255 { "BCM2E18" },
1256 { "BCM2E19" },
1257 { "BCM2E1A" },
1258 { "BCM2E1B" },
1259 { "BCM2E1C" },
1260 { "BCM2E1D" },
1261 { "BCM2E1F" },
1262 { "BCM2E20" },
1263 { "BCM2E21" },
1264 { "BCM2E22" },
1265 { "BCM2E23" },
1266 { "BCM2E24" },
1267 { "BCM2E25" },
1268 { "BCM2E26" },
1269 { "BCM2E27" },
1270 { "BCM2E28" },
1271 { "BCM2E29" },
1272 { "BCM2E2A" },
1273 { "BCM2E2B" },
1274 { "BCM2E2C" },
1275 { "BCM2E2D" },
1276 { "BCM2E2E" },
1277 { "BCM2E2F" },
1278 { "BCM2E30" },
1279 { "BCM2E31" },
1280 { "BCM2E32" },
1281 { "BCM2E33" },
1282 { "BCM2E34" },
1283 { "BCM2E35" },
1284 { "BCM2E36" },
1285 { "BCM2E37" },
1286 { "BCM2E38" },
1287 { "BCM2E39" },
1288 { "BCM2E3A" },
1289 { "BCM2E3B" },
1290 { "BCM2E3C" },
1291 { "BCM2E3D" },
1292 { "BCM2E3E" },
1293 { "BCM2E3F" },
1294 { "BCM2E40" },
1295 { "BCM2E41" },
1296 { "BCM2E42" },
1297 { "BCM2E43" },
1298 { "BCM2E44" },
1299 { "BCM2E45" },
1300 { "BCM2E46" },
1301 { "BCM2E47" },
1302 { "BCM2E48" },
1303 { "BCM2E49" },
1304 { "BCM2E4A" },
1305 { "BCM2E4B" },
1306 { "BCM2E4C" },
1307 { "BCM2E4D" },
1308 { "BCM2E4E" },
1309 { "BCM2E4F" },
1310 { "BCM2E50" },
1311 { "BCM2E51" },
1312 { "BCM2E52" },
1313 { "BCM2E53" },
1314 { "BCM2E54" },
1315 { "BCM2E55" },
1316 { "BCM2E56" },
1317 { "BCM2E57" },
1318 { "BCM2E58" },
1319 { "BCM2E59" },
1320 { "BCM2E5A" },
1321 { "BCM2E5B" },
1322 { "BCM2E5C" },
1323 { "BCM2E5D" },
1324 { "BCM2E5E" },
1325 { "BCM2E5F" },
1326 { "BCM2E60" },
1327 { "BCM2E61" },
1328 { "BCM2E62" },
1329 { "BCM2E63" },
1330 { "BCM2E64" },
1331 { "BCM2E65" },
1332 { "BCM2E66" },
1333 { "BCM2E67" },
1334 { "BCM2E68" },
1335 { "BCM2E69" },
1336 { "BCM2E6B" },
1337 { "BCM2E6D" },
1338 { "BCM2E6E" },
1339 { "BCM2E6F" },
1340 { "BCM2E70" },
1341 { "BCM2E71" },
1342 { "BCM2E72" },
1343 { "BCM2E73" },
1344 { "BCM2E74" },
1345 { "BCM2E75" },
1346 { "BCM2E76" },
1347 { "BCM2E77" },
1348 { "BCM2E78" },
1349 { "BCM2E79" },
1350 { "BCM2E7A" },
1351 { "BCM2E7B" },
1352 { "BCM2E7C" },
1353 { "BCM2E7D" },
1354 { "BCM2E7E" },
1355 { "BCM2E7F" },
1356 { "BCM2E80" },
1357 { "BCM2E81" },
1358 { "BCM2E82" },
1359 { "BCM2E83" },
1360 { "BCM2E84" },
1361 { "BCM2E85" },
1362 { "BCM2E86" },
1363 { "BCM2E87" },
1364 { "BCM2E88" },
1365 { "BCM2E89" },
1366 { "BCM2E8A" },
1367 { "BCM2E8B" },
1368 { "BCM2E8C" },
1369 { "BCM2E8D" },
1370 { "BCM2E8E" },
1371 { "BCM2E90" },
1372 { "BCM2E92" },
1373 { "BCM2E93" },
1374 { "BCM2E94" },
1375 { "BCM2E95" },
1376 { "BCM2E96" },
1377 { "BCM2E97" },
1378 { "BCM2E98" },
1379 { "BCM2E99" },
1380 { "BCM2E9A" },
1381 { "BCM2E9B" },
1382 { "BCM2E9C" },
1383 { "BCM2E9D" },
1384 { "BCM2EA0" },
1385 { "BCM2EA1" },
1386 { "BCM2EA2" },
1387 { "BCM2EA3" },
1388 { "BCM2EA4" },
1389 { "BCM2EA5" },
1390 { "BCM2EA6" },
1391 { "BCM2EA7" },
1392 { "BCM2EA8" },
1393 { "BCM2EA9" },
1394 { "BCM2EAA" },
1395 { "BCM2EAB" },
1396 { "BCM2EAC" },
1397 { },
1398 };
1399 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1400 #endif
1401
1402 /* suspend and resume callbacks */
1403 static const struct dev_pm_ops bcm_pm_ops = {
1404 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1405 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1406 };
1407
1408 static struct platform_driver bcm_driver = {
1409 .probe = bcm_probe,
1410 .remove = bcm_remove,
1411 .driver = {
1412 .name = "hci_bcm",
1413 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1414 .pm = &bcm_pm_ops,
1415 },
1416 };
1417
1418 static int bcm_serdev_probe(struct serdev_device *serdev)
1419 {
1420 struct bcm_device *bcmdev;
1421 const struct bcm_device_data *data;
1422 int err;
1423
1424 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1425 if (!bcmdev)
1426 return -ENOMEM;
1427
1428 bcmdev->dev = &serdev->dev;
1429 #ifdef CONFIG_PM
1430 bcmdev->hu = &bcmdev->serdev_hu;
1431 #endif
1432 bcmdev->serdev_hu.serdev = serdev;
1433 serdev_device_set_drvdata(serdev, bcmdev);
1434
1435 /* Initialize routing field to an unused value */
1436 bcmdev->pcm_int_params[0] = 0xff;
1437
1438 if (has_acpi_companion(&serdev->dev))
1439 err = bcm_acpi_probe(bcmdev);
1440 else
1441 err = bcm_of_probe(bcmdev);
1442 if (err)
1443 return err;
1444
1445 err = bcm_get_resources(bcmdev);
1446 if (err)
1447 return err;
1448
1449 if (!bcmdev->shutdown) {
1450 dev_warn(&serdev->dev,
1451 "No reset resource, using default baud rate\n");
1452 bcmdev->oper_speed = bcmdev->init_speed;
1453 }
1454
1455 err = bcm_gpio_set_power(bcmdev, false);
1456 if (err)
1457 dev_err(&serdev->dev, "Failed to power down\n");
1458
1459 data = device_get_match_data(bcmdev->dev);
1460 if (data) {
1461 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1462 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1463 }
1464
1465 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1466 }
1467
1468 static void bcm_serdev_remove(struct serdev_device *serdev)
1469 {
1470 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1471
1472 hci_uart_unregister_device(&bcmdev->serdev_hu);
1473 }
1474
1475 #ifdef CONFIG_OF
1476 static struct bcm_device_data bcm4354_device_data = {
1477 .no_early_set_baudrate = true,
1478 };
1479
1480 static struct bcm_device_data bcm43438_device_data = {
1481 .drive_rts_on_open = true,
1482 };
1483
1484 static const struct of_device_id bcm_bluetooth_of_match[] = {
1485 { .compatible = "brcm,bcm20702a1" },
1486 { .compatible = "brcm,bcm4329-bt" },
1487 { .compatible = "brcm,bcm4345c5" },
1488 { .compatible = "brcm,bcm4330-bt" },
1489 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1490 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1491 { .compatible = "brcm,bcm4335a0" },
1492 { },
1493 };
1494 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1495 #endif
1496
1497 static struct serdev_device_driver bcm_serdev_driver = {
1498 .probe = bcm_serdev_probe,
1499 .remove = bcm_serdev_remove,
1500 .driver = {
1501 .name = "hci_uart_bcm",
1502 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1503 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1504 .pm = &bcm_pm_ops,
1505 },
1506 };
1507
1508 int __init bcm_init(void)
1509 {
1510 /* For now, we need to keep both platform device
1511 * driver (ACPI generated) and serdev driver (DT).
1512 */
1513 platform_driver_register(&bcm_driver);
1514 serdev_device_driver_register(&bcm_serdev_driver);
1515
1516 return hci_uart_register_proto(&bcm_proto);
1517 }
1518
1519 int __exit bcm_deinit(void)
1520 {
1521 platform_driver_unregister(&bcm_driver);
1522 serdev_device_driver_unregister(&bcm_serdev_driver);
1523
1524 return hci_uart_unregister_proto(&bcm_proto);
1525 }
Linux with added FPC-III support