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leds: wm831x-status: fix use-after-free on unbind
[linux/fpc-iii.git] / drivers / bluetooth / hci_bcm.c
blob8ea5ca8d71d6d2260965cfc1c9f4ae0e0a645d13
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 bool irq_acquired;
122
123 #ifdef CONFIG_PM
124 struct hci_uart *hu;
125 bool is_suspended;
126 #endif
127 bool no_early_set_baudrate;
128 bool drive_rts_on_open;
129 u8 pcm_int_params[5];
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(100000, 120000);
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 bdev->irq_acquired = true;
338
339 device_init_wakeup(bdev->dev, true);
340
341 pm_runtime_set_autosuspend_delay(bdev->dev,
342 BCM_AUTOSUSPEND_DELAY);
343 pm_runtime_use_autosuspend(bdev->dev);
344 pm_runtime_set_active(bdev->dev);
345 pm_runtime_enable(bdev->dev);
346
347 unlock:
348 mutex_unlock(&bcm_device_lock);
349
350 return err;
351 }
352
353 static const struct bcm_set_sleep_mode default_sleep_params = {
354 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
355 .idle_host = 2, /* idle threshold HOST, in 300ms */
356 .idle_dev = 2, /* idle threshold device, in 300ms */
357 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
358 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
359 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
360 .combine_modes = 1, /* Combine sleep and LPM flag */
361 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
362 /* Irrelevant USB flags */
363 .usb_auto_sleep = 0,
364 .usb_resume_timeout = 0,
365 .break_to_host = 0,
366 .pulsed_host_wake = 1,
367 };
368
369 static int bcm_setup_sleep(struct hci_uart *hu)
370 {
371 struct bcm_data *bcm = hu->priv;
372 struct sk_buff *skb;
373 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
374
375 sleep_params.host_wake_active = !bcm->dev->irq_active_low;
376
377 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
378 &sleep_params, HCI_INIT_TIMEOUT);
379 if (IS_ERR(skb)) {
380 int err = PTR_ERR(skb);
381 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
382 return err;
383 }
384 kfree_skb(skb);
385
386 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
387
388 return 0;
389 }
390 #else
391 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
392 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
393 #endif
394
395 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
396 {
397 struct hci_uart *hu = hci_get_drvdata(hdev);
398 struct bcm_data *bcm = hu->priv;
399 struct sk_buff *skb;
400
401 if (!test_bit(HCI_RUNNING, &hdev->flags))
402 return -ENETDOWN;
403
404 skb = bt_skb_alloc(3, GFP_KERNEL);
405 if (!skb)
406 return -ENOMEM;
407
408 skb_put_u8(skb, BCM_LM_DIAG_PKT);
409 skb_put_u8(skb, 0xf0);
410 skb_put_u8(skb, enable);
411
412 skb_queue_tail(&bcm->txq, skb);
413 hci_uart_tx_wakeup(hu);
414
415 return 0;
416 }
417
418 static int bcm_open(struct hci_uart *hu)
419 {
420 struct bcm_data *bcm;
421 struct list_head *p;
422 int err;
423
424 bt_dev_dbg(hu->hdev, "hu %p", hu);
425
426 if (!hci_uart_has_flow_control(hu))
427 return -EOPNOTSUPP;
428
429 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
430 if (!bcm)
431 return -ENOMEM;
432
433 skb_queue_head_init(&bcm->txq);
434
435 hu->priv = bcm;
436
437 mutex_lock(&bcm_device_lock);
438
439 if (hu->serdev) {
440 bcm->dev = serdev_device_get_drvdata(hu->serdev);
441 goto out;
442 }
443
444 if (!hu->tty->dev)
445 goto out;
446
447 list_for_each(p, &bcm_device_list) {
448 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
449
450 /* Retrieve saved bcm_device based on parent of the
451 * platform device (saved during device probe) and
452 * parent of tty device used by hci_uart
453 */
454 if (hu->tty->dev->parent == dev->dev->parent) {
455 bcm->dev = dev;
456 #ifdef CONFIG_PM
457 dev->hu = hu;
458 #endif
459 break;
460 }
461 }
462
463 out:
464 if (bcm->dev) {
465 if (bcm->dev->drive_rts_on_open)
466 hci_uart_set_flow_control(hu, true);
467
468 hu->init_speed = bcm->dev->init_speed;
469
470 /* If oper_speed is set, ldisc/serdev will set the baudrate
471 * before calling setup()
472 */
473 if (!bcm->dev->no_early_set_baudrate)
474 hu->oper_speed = bcm->dev->oper_speed;
475
476 err = bcm_gpio_set_power(bcm->dev, true);
477
478 if (bcm->dev->drive_rts_on_open)
479 hci_uart_set_flow_control(hu, false);
480
481 if (err)
482 goto err_unset_hu;
483 }
484
485 mutex_unlock(&bcm_device_lock);
486 return 0;
487
488 err_unset_hu:
489 #ifdef CONFIG_PM
490 if (!hu->serdev)
491 bcm->dev->hu = NULL;
492 #endif
493 mutex_unlock(&bcm_device_lock);
494 hu->priv = NULL;
495 kfree(bcm);
496 return err;
497 }
498
499 static int bcm_close(struct hci_uart *hu)
500 {
501 struct bcm_data *bcm = hu->priv;
502 struct bcm_device *bdev = NULL;
503 int err;
504
505 bt_dev_dbg(hu->hdev, "hu %p", hu);
506
507 /* Protect bcm->dev against removal of the device or driver */
508 mutex_lock(&bcm_device_lock);
509
510 if (hu->serdev) {
511 bdev = serdev_device_get_drvdata(hu->serdev);
512 } else if (bcm_device_exists(bcm->dev)) {
513 bdev = bcm->dev;
514 #ifdef CONFIG_PM
515 bdev->hu = NULL;
516 #endif
517 }
518
519 if (bdev) {
520 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) {
521 devm_free_irq(bdev->dev, bdev->irq, bdev);
522 device_init_wakeup(bdev->dev, false);
523 pm_runtime_disable(bdev->dev);
524 }
525
526 err = bcm_gpio_set_power(bdev, false);
527 if (err)
528 bt_dev_err(hu->hdev, "Failed to power down");
529 else
530 pm_runtime_set_suspended(bdev->dev);
531 }
532 mutex_unlock(&bcm_device_lock);
533
534 skb_queue_purge(&bcm->txq);
535 kfree_skb(bcm->rx_skb);
536 kfree(bcm);
537
538 hu->priv = NULL;
539 return 0;
540 }
541
542 static int bcm_flush(struct hci_uart *hu)
543 {
544 struct bcm_data *bcm = hu->priv;
545
546 bt_dev_dbg(hu->hdev, "hu %p", hu);
547
548 skb_queue_purge(&bcm->txq);
549
550 return 0;
551 }
552
553 static int bcm_setup(struct hci_uart *hu)
554 {
555 struct bcm_data *bcm = hu->priv;
556 bool fw_load_done = false;
557 unsigned int speed;
558 int err;
559
560 bt_dev_dbg(hu->hdev, "hu %p", hu);
561
562 hu->hdev->set_diag = bcm_set_diag;
563 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
564
565 err = btbcm_initialize(hu->hdev, &fw_load_done);
566 if (err)
567 return err;
568
569 if (!fw_load_done)
570 return 0;
571
572 /* Init speed if any */
573 if (hu->init_speed)
574 speed = hu->init_speed;
575 else if (hu->proto->init_speed)
576 speed = hu->proto->init_speed;
577 else
578 speed = 0;
579
580 if (speed)
581 host_set_baudrate(hu, speed);
582
583 /* Operational speed if any */
584 if (hu->oper_speed)
585 speed = hu->oper_speed;
586 else if (bcm->dev && bcm->dev->oper_speed)
587 speed = bcm->dev->oper_speed;
588 else if (hu->proto->oper_speed)
589 speed = hu->proto->oper_speed;
590 else
591 speed = 0;
592
593 if (speed) {
594 err = bcm_set_baudrate(hu, speed);
595 if (!err)
596 host_set_baudrate(hu, speed);
597 }
598
599 /* PCM parameters if provided */
600 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
601 struct bcm_set_pcm_int_params params;
602
603 btbcm_read_pcm_int_params(hu->hdev, &params);
604
605 memcpy(&params, bcm->dev->pcm_int_params, 5);
606 btbcm_write_pcm_int_params(hu->hdev, &params);
607 }
608
609 err = btbcm_finalize(hu->hdev, &fw_load_done);
610 if (err)
611 return err;
612
613 /* Some devices ship with the controller default address.
614 * Allow the bootloader to set a valid address through the
615 * device tree.
616 */
617 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
618
619 if (!bcm_request_irq(bcm))
620 err = bcm_setup_sleep(hu);
621
622 return err;
623 }
624
625 #define BCM_RECV_LM_DIAG \
626 .type = BCM_LM_DIAG_PKT, \
627 .hlen = BCM_LM_DIAG_SIZE, \
628 .loff = 0, \
629 .lsize = 0, \
630 .maxlen = BCM_LM_DIAG_SIZE
631
632 #define BCM_RECV_NULL \
633 .type = BCM_NULL_PKT, \
634 .hlen = BCM_NULL_SIZE, \
635 .loff = 0, \
636 .lsize = 0, \
637 .maxlen = BCM_NULL_SIZE
638
639 #define BCM_RECV_TYPE49 \
640 .type = BCM_TYPE49_PKT, \
641 .hlen = BCM_TYPE49_SIZE, \
642 .loff = 0, \
643 .lsize = 0, \
644 .maxlen = BCM_TYPE49_SIZE
645
646 #define BCM_RECV_TYPE52 \
647 .type = BCM_TYPE52_PKT, \
648 .hlen = BCM_TYPE52_SIZE, \
649 .loff = 0, \
650 .lsize = 0, \
651 .maxlen = BCM_TYPE52_SIZE
652
653 static const struct h4_recv_pkt bcm_recv_pkts[] = {
654 { H4_RECV_ACL, .recv = hci_recv_frame },
655 { H4_RECV_SCO, .recv = hci_recv_frame },
656 { H4_RECV_EVENT, .recv = hci_recv_frame },
657 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
658 { BCM_RECV_NULL, .recv = hci_recv_diag },
659 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
660 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
661 };
662
663 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
664 {
665 struct bcm_data *bcm = hu->priv;
666
667 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
668 return -EUNATCH;
669
670 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
671 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
672 if (IS_ERR(bcm->rx_skb)) {
673 int err = PTR_ERR(bcm->rx_skb);
674 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
675 bcm->rx_skb = NULL;
676 return err;
677 } else if (!bcm->rx_skb) {
678 /* Delay auto-suspend when receiving completed packet */
679 mutex_lock(&bcm_device_lock);
680 if (bcm->dev && bcm_device_exists(bcm->dev)) {
681 pm_runtime_get(bcm->dev->dev);
682 pm_runtime_mark_last_busy(bcm->dev->dev);
683 pm_runtime_put_autosuspend(bcm->dev->dev);
684 }
685 mutex_unlock(&bcm_device_lock);
686 }
687
688 return count;
689 }
690
691 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
692 {
693 struct bcm_data *bcm = hu->priv;
694
695 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
696
697 /* Prepend skb with frame type */
698 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
699 skb_queue_tail(&bcm->txq, skb);
700
701 return 0;
702 }
703
704 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
705 {
706 struct bcm_data *bcm = hu->priv;
707 struct sk_buff *skb = NULL;
708 struct bcm_device *bdev = NULL;
709
710 mutex_lock(&bcm_device_lock);
711
712 if (bcm_device_exists(bcm->dev)) {
713 bdev = bcm->dev;
714 pm_runtime_get_sync(bdev->dev);
715 /* Shall be resumed here */
716 }
717
718 skb = skb_dequeue(&bcm->txq);
719
720 if (bdev) {
721 pm_runtime_mark_last_busy(bdev->dev);
722 pm_runtime_put_autosuspend(bdev->dev);
723 }
724
725 mutex_unlock(&bcm_device_lock);
726
727 return skb;
728 }
729
730 #ifdef CONFIG_PM
731 static int bcm_suspend_device(struct device *dev)
732 {
733 struct bcm_device *bdev = dev_get_drvdata(dev);
734 int err;
735
736 bt_dev_dbg(bdev, "");
737
738 if (!bdev->is_suspended && bdev->hu) {
739 hci_uart_set_flow_control(bdev->hu, true);
740
741 /* Once this returns, driver suspends BT via GPIO */
742 bdev->is_suspended = true;
743 }
744
745 /* Suspend the device */
746 err = bdev->set_device_wakeup(bdev, false);
747 if (err) {
748 if (bdev->is_suspended && bdev->hu) {
749 bdev->is_suspended = false;
750 hci_uart_set_flow_control(bdev->hu, false);
751 }
752 return -EBUSY;
753 }
754
755 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
756 msleep(15);
757
758 return 0;
759 }
760
761 static int bcm_resume_device(struct device *dev)
762 {
763 struct bcm_device *bdev = dev_get_drvdata(dev);
764 int err;
765
766 bt_dev_dbg(bdev, "");
767
768 err = bdev->set_device_wakeup(bdev, true);
769 if (err) {
770 dev_err(dev, "Failed to power up\n");
771 return err;
772 }
773
774 bt_dev_dbg(bdev, "resume, delaying 15 ms");
775 msleep(15);
776
777 /* When this executes, the device has woken up already */
778 if (bdev->is_suspended && bdev->hu) {
779 bdev->is_suspended = false;
780
781 hci_uart_set_flow_control(bdev->hu, false);
782 }
783
784 return 0;
785 }
786 #endif
787
788 #ifdef CONFIG_PM_SLEEP
789 /* suspend callback */
790 static int bcm_suspend(struct device *dev)
791 {
792 struct bcm_device *bdev = dev_get_drvdata(dev);
793 int error;
794
795 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
796
797 /*
798 * When used with a device instantiated as platform_device, bcm_suspend
799 * can be called at any time as long as the platform device is bound,
800 * so it should use bcm_device_lock to protect access to hci_uart
801 * and device_wake-up GPIO.
802 */
803 mutex_lock(&bcm_device_lock);
804
805 if (!bdev->hu)
806 goto unlock;
807
808 if (pm_runtime_active(dev))
809 bcm_suspend_device(dev);
810
811 if (device_may_wakeup(dev) && bdev->irq > 0) {
812 error = enable_irq_wake(bdev->irq);
813 if (!error)
814 bt_dev_dbg(bdev, "BCM irq: enabled");
815 }
816
817 unlock:
818 mutex_unlock(&bcm_device_lock);
819
820 return 0;
821 }
822
823 /* resume callback */
824 static int bcm_resume(struct device *dev)
825 {
826 struct bcm_device *bdev = dev_get_drvdata(dev);
827 int err = 0;
828
829 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
830
831 /*
832 * When used with a device instantiated as platform_device, bcm_resume
833 * can be called at any time as long as platform device is bound,
834 * so it should use bcm_device_lock to protect access to hci_uart
835 * and device_wake-up GPIO.
836 */
837 mutex_lock(&bcm_device_lock);
838
839 if (!bdev->hu)
840 goto unlock;
841
842 if (device_may_wakeup(dev) && bdev->irq > 0) {
843 disable_irq_wake(bdev->irq);
844 bt_dev_dbg(bdev, "BCM irq: disabled");
845 }
846
847 err = bcm_resume_device(dev);
848
849 unlock:
850 mutex_unlock(&bcm_device_lock);
851
852 if (!err) {
853 pm_runtime_disable(dev);
854 pm_runtime_set_active(dev);
855 pm_runtime_enable(dev);
856 }
857
858 return 0;
859 }
860 #endif
861
862 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
863 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
864 {
865 .ident = "Meegopad T08",
866 .matches = {
867 DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
868 "To be filled by OEM."),
869 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
870 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
871 },
872 },
873 { }
874 };
875
876 #ifdef CONFIG_ACPI
877 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
878 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
879 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
880
881 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
882 { "device-wakeup-gpios", &first_gpio, 1 },
883 { "shutdown-gpios", &second_gpio, 1 },
884 { "host-wakeup-gpios", &third_gpio, 1 },
885 { },
886 };
887
888 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
889 { "host-wakeup-gpios", &first_gpio, 1 },
890 { "device-wakeup-gpios", &second_gpio, 1 },
891 { "shutdown-gpios", &third_gpio, 1 },
892 { },
893 };
894
895 static int bcm_resource(struct acpi_resource *ares, void *data)
896 {
897 struct bcm_device *dev = data;
898 struct acpi_resource_extended_irq *irq;
899 struct acpi_resource_gpio *gpio;
900 struct acpi_resource_uart_serialbus *sb;
901
902 switch (ares->type) {
903 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
904 irq = &ares->data.extended_irq;
905 if (irq->polarity != ACPI_ACTIVE_LOW)
906 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
907 dev->irq_active_low = true;
908 break;
909
910 case ACPI_RESOURCE_TYPE_GPIO:
911 gpio = &ares->data.gpio;
912 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
913 dev->gpio_int_idx = dev->gpio_count;
914 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
915 }
916 dev->gpio_count++;
917 break;
918
919 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
920 sb = &ares->data.uart_serial_bus;
921 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
922 dev->init_speed = sb->default_baud_rate;
923 dev->oper_speed = 4000000;
924 }
925 break;
926
927 default:
928 break;
929 }
930
931 return 0;
932 }
933
934 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
935 {
936 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
937 return -EIO;
938
939 return 0;
940 }
941
942 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
943 {
944 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
945 NULL, NULL, NULL)))
946 return -EIO;
947
948 return 0;
949 }
950
951 static int bcm_apple_get_resources(struct bcm_device *dev)
952 {
953 struct acpi_device *adev = ACPI_COMPANION(dev->dev);
954 const union acpi_object *obj;
955
956 if (!adev ||
957 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
958 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
959 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
960 return -ENODEV;
961
962 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
963 obj->buffer.length == 8)
964 dev->init_speed = *(u64 *)obj->buffer.pointer;
965
966 dev->set_device_wakeup = bcm_apple_set_device_wakeup;
967 dev->set_shutdown = bcm_apple_set_shutdown;
968
969 return 0;
970 }
971 #else
972 static inline int bcm_apple_get_resources(struct bcm_device *dev)
973 {
974 return -EOPNOTSUPP;
975 }
976 #endif /* CONFIG_ACPI */
977
978 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
979 {
980 gpiod_set_value_cansleep(dev->device_wakeup, awake);
981 return 0;
982 }
983
984 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
985 {
986 gpiod_set_value_cansleep(dev->shutdown, powered);
987 return 0;
988 }
989
990 /* Try a bunch of names for TXCO */
991 static struct clk *bcm_get_txco(struct device *dev)
992 {
993 struct clk *clk;
994
995 /* New explicit name */
996 clk = devm_clk_get(dev, "txco");
997 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
998 return clk;
999
1000 /* Deprecated name */
1001 clk = devm_clk_get(dev, "extclk");
1002 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1003 return clk;
1004
1005 /* Original code used no name at all */
1006 return devm_clk_get(dev, NULL);
1007 }
1008
1009 static int bcm_get_resources(struct bcm_device *dev)
1010 {
1011 const struct dmi_system_id *dmi_id;
1012 int err;
1013
1014 dev->name = dev_name(dev->dev);
1015
1016 if (x86_apple_machine && !bcm_apple_get_resources(dev))
1017 return 0;
1018
1019 dev->txco_clk = bcm_get_txco(dev->dev);
1020
1021 /* Handle deferred probing */
1022 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1023 return PTR_ERR(dev->txco_clk);
1024
1025 /* Ignore all other errors as before */
1026 if (IS_ERR(dev->txco_clk))
1027 dev->txco_clk = NULL;
1028
1029 dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1030 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1031 return PTR_ERR(dev->lpo_clk);
1032
1033 if (IS_ERR(dev->lpo_clk))
1034 dev->lpo_clk = NULL;
1035
1036 /* Check if we accidentally fetched the lpo clock twice */
1037 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1038 devm_clk_put(dev->dev, dev->txco_clk);
1039 dev->txco_clk = NULL;
1040 }
1041
1042 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1043 GPIOD_OUT_LOW);
1044 if (IS_ERR(dev->device_wakeup))
1045 return PTR_ERR(dev->device_wakeup);
1046
1047 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1048 GPIOD_OUT_LOW);
1049 if (IS_ERR(dev->shutdown))
1050 return PTR_ERR(dev->shutdown);
1051
1052 dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1053 dev->set_shutdown = bcm_gpio_set_shutdown;
1054
1055 dev->supplies[0].supply = "vbat";
1056 dev->supplies[1].supply = "vddio";
1057 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1058 dev->supplies);
1059 if (err)
1060 return err;
1061
1062 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1063 if (dev->irq <= 0) {
1064 struct gpio_desc *gpio;
1065
1066 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1067 GPIOD_IN);
1068 if (IS_ERR(gpio))
1069 return PTR_ERR(gpio);
1070
1071 dev->irq = gpiod_to_irq(gpio);
1072 }
1073
1074 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1075 if (dmi_id) {
1076 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1077 dmi_id->ident);
1078 dev->irq = 0;
1079 }
1080
1081 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1082 return 0;
1083 }
1084
1085 #ifdef CONFIG_ACPI
1086 static int bcm_acpi_probe(struct bcm_device *dev)
1087 {
1088 LIST_HEAD(resources);
1089 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1090 struct resource_entry *entry;
1091 int ret;
1092
1093 /* Retrieve UART ACPI info */
1094 dev->gpio_int_idx = -1;
1095 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1096 &resources, bcm_resource, dev);
1097 if (ret < 0)
1098 return ret;
1099
1100 resource_list_for_each_entry(entry, &resources) {
1101 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1102 dev->irq = entry->res->start;
1103 break;
1104 }
1105 }
1106 acpi_dev_free_resource_list(&resources);
1107
1108 /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1109 * only 2 GPIO resources, we use the irq-last mapping for this, since
1110 * we already have an irq the 3th / last mapping will not be used.
1111 */
1112 if (dev->irq)
1113 gpio_mapping = acpi_bcm_int_last_gpios;
1114 else if (dev->gpio_int_idx == 0)
1115 gpio_mapping = acpi_bcm_int_first_gpios;
1116 else if (dev->gpio_int_idx == 2)
1117 gpio_mapping = acpi_bcm_int_last_gpios;
1118 else
1119 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1120 dev->gpio_int_idx);
1121
1122 /* Warn if our expectations are not met. */
1123 if (dev->gpio_count != (dev->irq ? 2 : 3))
1124 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1125 dev->gpio_count);
1126
1127 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1128 if (ret)
1129 return ret;
1130
1131 if (irq_polarity != -1) {
1132 dev->irq_active_low = irq_polarity;
1133 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1134 dev->irq_active_low ? "low" : "high");
1135 }
1136
1137 return 0;
1138 }
1139 #else
1140 static int bcm_acpi_probe(struct bcm_device *dev)
1141 {
1142 return -EINVAL;
1143 }
1144 #endif /* CONFIG_ACPI */
1145
1146 static int bcm_of_probe(struct bcm_device *bdev)
1147 {
1148 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1149 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1150 bdev->pcm_int_params, 5);
1151 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1152 bdev->irq_active_low = irq_get_trigger_type(bdev->irq)
1153 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW);
1154 return 0;
1155 }
1156
1157 static int bcm_probe(struct platform_device *pdev)
1158 {
1159 struct bcm_device *dev;
1160 int ret;
1161
1162 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1163 if (!dev)
1164 return -ENOMEM;
1165
1166 dev->dev = &pdev->dev;
1167 dev->irq = platform_get_irq(pdev, 0);
1168
1169 /* Initialize routing field to an unused value */
1170 dev->pcm_int_params[0] = 0xff;
1171
1172 if (has_acpi_companion(&pdev->dev)) {
1173 ret = bcm_acpi_probe(dev);
1174 if (ret)
1175 return ret;
1176 }
1177
1178 ret = bcm_get_resources(dev);
1179 if (ret)
1180 return ret;
1181
1182 platform_set_drvdata(pdev, dev);
1183
1184 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1185
1186 /* Place this instance on the device list */
1187 mutex_lock(&bcm_device_lock);
1188 list_add_tail(&dev->list, &bcm_device_list);
1189 mutex_unlock(&bcm_device_lock);
1190
1191 ret = bcm_gpio_set_power(dev, false);
1192 if (ret)
1193 dev_err(&pdev->dev, "Failed to power down\n");
1194
1195 return 0;
1196 }
1197
1198 static int bcm_remove(struct platform_device *pdev)
1199 {
1200 struct bcm_device *dev = platform_get_drvdata(pdev);
1201
1202 mutex_lock(&bcm_device_lock);
1203 list_del(&dev->list);
1204 mutex_unlock(&bcm_device_lock);
1205
1206 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1207
1208 return 0;
1209 }
1210
1211 static const struct hci_uart_proto bcm_proto = {
1212 .id = HCI_UART_BCM,
1213 .name = "Broadcom",
1214 .manufacturer = 15,
1215 .init_speed = 115200,
1216 .open = bcm_open,
1217 .close = bcm_close,
1218 .flush = bcm_flush,
1219 .setup = bcm_setup,
1220 .set_baudrate = bcm_set_baudrate,
1221 .recv = bcm_recv,
1222 .enqueue = bcm_enqueue,
1223 .dequeue = bcm_dequeue,
1224 };
1225
1226 #ifdef CONFIG_ACPI
1227 static const struct acpi_device_id bcm_acpi_match[] = {
1228 { "BCM2E00" },
1229 { "BCM2E01" },
1230 { "BCM2E02" },
1231 { "BCM2E03" },
1232 { "BCM2E04" },
1233 { "BCM2E05" },
1234 { "BCM2E06" },
1235 { "BCM2E07" },
1236 { "BCM2E08" },
1237 { "BCM2E09" },
1238 { "BCM2E0A" },
1239 { "BCM2E0B" },
1240 { "BCM2E0C" },
1241 { "BCM2E0D" },
1242 { "BCM2E0E" },
1243 { "BCM2E0F" },
1244 { "BCM2E10" },
1245 { "BCM2E11" },
1246 { "BCM2E12" },
1247 { "BCM2E13" },
1248 { "BCM2E14" },
1249 { "BCM2E15" },
1250 { "BCM2E16" },
1251 { "BCM2E17" },
1252 { "BCM2E18" },
1253 { "BCM2E19" },
1254 { "BCM2E1A" },
1255 { "BCM2E1B" },
1256 { "BCM2E1C" },
1257 { "BCM2E1D" },
1258 { "BCM2E1F" },
1259 { "BCM2E20" },
1260 { "BCM2E21" },
1261 { "BCM2E22" },
1262 { "BCM2E23" },
1263 { "BCM2E24" },
1264 { "BCM2E25" },
1265 { "BCM2E26" },
1266 { "BCM2E27" },
1267 { "BCM2E28" },
1268 { "BCM2E29" },
1269 { "BCM2E2A" },
1270 { "BCM2E2B" },
1271 { "BCM2E2C" },
1272 { "BCM2E2D" },
1273 { "BCM2E2E" },
1274 { "BCM2E2F" },
1275 { "BCM2E30" },
1276 { "BCM2E31" },
1277 { "BCM2E32" },
1278 { "BCM2E33" },
1279 { "BCM2E34" },
1280 { "BCM2E35" },
1281 { "BCM2E36" },
1282 { "BCM2E37" },
1283 { "BCM2E38" },
1284 { "BCM2E39" },
1285 { "BCM2E3A" },
1286 { "BCM2E3B" },
1287 { "BCM2E3C" },
1288 { "BCM2E3D" },
1289 { "BCM2E3E" },
1290 { "BCM2E3F" },
1291 { "BCM2E40" },
1292 { "BCM2E41" },
1293 { "BCM2E42" },
1294 { "BCM2E43" },
1295 { "BCM2E44" },
1296 { "BCM2E45" },
1297 { "BCM2E46" },
1298 { "BCM2E47" },
1299 { "BCM2E48" },
1300 { "BCM2E49" },
1301 { "BCM2E4A" },
1302 { "BCM2E4B" },
1303 { "BCM2E4C" },
1304 { "BCM2E4D" },
1305 { "BCM2E4E" },
1306 { "BCM2E4F" },
1307 { "BCM2E50" },
1308 { "BCM2E51" },
1309 { "BCM2E52" },
1310 { "BCM2E53" },
1311 { "BCM2E54" },
1312 { "BCM2E55" },
1313 { "BCM2E56" },
1314 { "BCM2E57" },
1315 { "BCM2E58" },
1316 { "BCM2E59" },
1317 { "BCM2E5A" },
1318 { "BCM2E5B" },
1319 { "BCM2E5C" },
1320 { "BCM2E5D" },
1321 { "BCM2E5E" },
1322 { "BCM2E5F" },
1323 { "BCM2E60" },
1324 { "BCM2E61" },
1325 { "BCM2E62" },
1326 { "BCM2E63" },
1327 { "BCM2E64" },
1328 { "BCM2E65" },
1329 { "BCM2E66" },
1330 { "BCM2E67" },
1331 { "BCM2E68" },
1332 { "BCM2E69" },
1333 { "BCM2E6B" },
1334 { "BCM2E6D" },
1335 { "BCM2E6E" },
1336 { "BCM2E6F" },
1337 { "BCM2E70" },
1338 { "BCM2E71" },
1339 { "BCM2E72" },
1340 { "BCM2E73" },
1341 { "BCM2E74" },
1342 { "BCM2E75" },
1343 { "BCM2E76" },
1344 { "BCM2E77" },
1345 { "BCM2E78" },
1346 { "BCM2E79" },
1347 { "BCM2E7A" },
1348 { "BCM2E7B" },
1349 { "BCM2E7C" },
1350 { "BCM2E7D" },
1351 { "BCM2E7E" },
1352 { "BCM2E7F" },
1353 { "BCM2E80" },
1354 { "BCM2E81" },
1355 { "BCM2E82" },
1356 { "BCM2E83" },
1357 { "BCM2E84" },
1358 { "BCM2E85" },
1359 { "BCM2E86" },
1360 { "BCM2E87" },
1361 { "BCM2E88" },
1362 { "BCM2E89" },
1363 { "BCM2E8A" },
1364 { "BCM2E8B" },
1365 { "BCM2E8C" },
1366 { "BCM2E8D" },
1367 { "BCM2E8E" },
1368 { "BCM2E90" },
1369 { "BCM2E92" },
1370 { "BCM2E93" },
1371 { "BCM2E94" },
1372 { "BCM2E95" },
1373 { "BCM2E96" },
1374 { "BCM2E97" },
1375 { "BCM2E98" },
1376 { "BCM2E99" },
1377 { "BCM2E9A" },
1378 { "BCM2E9B" },
1379 { "BCM2E9C" },
1380 { "BCM2E9D" },
1381 { "BCM2EA0" },
1382 { "BCM2EA1" },
1383 { "BCM2EA2" },
1384 { "BCM2EA3" },
1385 { "BCM2EA4" },
1386 { "BCM2EA5" },
1387 { "BCM2EA6" },
1388 { "BCM2EA7" },
1389 { "BCM2EA8" },
1390 { "BCM2EA9" },
1391 { "BCM2EAA" },
1392 { "BCM2EAB" },
1393 { "BCM2EAC" },
1394 { },
1395 };
1396 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1397 #endif
1398
1399 /* suspend and resume callbacks */
1400 static const struct dev_pm_ops bcm_pm_ops = {
1401 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1402 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1403 };
1404
1405 static struct platform_driver bcm_driver = {
1406 .probe = bcm_probe,
1407 .remove = bcm_remove,
1408 .driver = {
1409 .name = "hci_bcm",
1410 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1411 .pm = &bcm_pm_ops,
1412 },
1413 };
1414
1415 static int bcm_serdev_probe(struct serdev_device *serdev)
1416 {
1417 struct bcm_device *bcmdev;
1418 const struct bcm_device_data *data;
1419 int err;
1420
1421 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1422 if (!bcmdev)
1423 return -ENOMEM;
1424
1425 bcmdev->dev = &serdev->dev;
1426 #ifdef CONFIG_PM
1427 bcmdev->hu = &bcmdev->serdev_hu;
1428 #endif
1429 bcmdev->serdev_hu.serdev = serdev;
1430 serdev_device_set_drvdata(serdev, bcmdev);
1431
1432 /* Initialize routing field to an unused value */
1433 bcmdev->pcm_int_params[0] = 0xff;
1434
1435 if (has_acpi_companion(&serdev->dev))
1436 err = bcm_acpi_probe(bcmdev);
1437 else
1438 err = bcm_of_probe(bcmdev);
1439 if (err)
1440 return err;
1441
1442 err = bcm_get_resources(bcmdev);
1443 if (err)
1444 return err;
1445
1446 if (!bcmdev->shutdown) {
1447 dev_warn(&serdev->dev,
1448 "No reset resource, using default baud rate\n");
1449 bcmdev->oper_speed = bcmdev->init_speed;
1450 }
1451
1452 err = bcm_gpio_set_power(bcmdev, false);
1453 if (err)
1454 dev_err(&serdev->dev, "Failed to power down\n");
1455
1456 data = device_get_match_data(bcmdev->dev);
1457 if (data) {
1458 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1459 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1460 }
1461
1462 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1463 }
1464
1465 static void bcm_serdev_remove(struct serdev_device *serdev)
1466 {
1467 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1468
1469 hci_uart_unregister_device(&bcmdev->serdev_hu);
1470 }
1471
1472 #ifdef CONFIG_OF
1473 static struct bcm_device_data bcm4354_device_data = {
1474 .no_early_set_baudrate = true,
1475 };
1476
1477 static struct bcm_device_data bcm43438_device_data = {
1478 .drive_rts_on_open = true,
1479 };
1480
1481 static const struct of_device_id bcm_bluetooth_of_match[] = {
1482 { .compatible = "brcm,bcm20702a1" },
1483 { .compatible = "brcm,bcm4329-bt" },
1484 { .compatible = "brcm,bcm4345c5" },
1485 { .compatible = "brcm,bcm4330-bt" },
1486 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1487 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1488 { .compatible = "brcm,bcm4335a0" },
1489 { },
1490 };
1491 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1492 #endif
1493
1494 static struct serdev_device_driver bcm_serdev_driver = {
1495 .probe = bcm_serdev_probe,
1496 .remove = bcm_serdev_remove,
1497 .driver = {
1498 .name = "hci_uart_bcm",
1499 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1500 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1501 .pm = &bcm_pm_ops,
1502 },
1503 };
1504
1505 int __init bcm_init(void)
1506 {
1507 /* For now, we need to keep both platform device
1508 * driver (ACPI generated) and serdev driver (DT).
1509 */
1510 platform_driver_register(&bcm_driver);
1511 serdev_device_driver_register(&bcm_serdev_driver);
1512
1513 return hci_uart_register_proto(&bcm_proto);
1514 }
1515
1516 int __exit bcm_deinit(void)
1517 {
1518 platform_driver_unregister(&bcm_driver);
1519 serdev_device_driver_unregister(&bcm_serdev_driver);
1520
1521 return hci_uart_unregister_proto(&bcm_proto);
1522 }
Linux with added FPC-III support