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dm writecache: add cond_resched to loop in persistent_memory_claim()
[linux/fpc-iii.git] / drivers / bluetooth / hci_bcm.c
blob19e4587f366cc78a3f5d7e131014a0dc7a1263c0
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 char fw_name[64];
557 const struct firmware *fw;
558 unsigned int speed;
559 int err;
560
561 bt_dev_dbg(hu->hdev, "hu %p", hu);
562
563 hu->hdev->set_diag = bcm_set_diag;
564 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
565
566 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
567 if (err)
568 return err;
569
570 err = request_firmware(&fw, fw_name, &hu->hdev->dev);
571 if (err < 0) {
572 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
573 return 0;
574 }
575
576 err = btbcm_patchram(hu->hdev, fw);
577 if (err) {
578 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
579 goto finalize;
580 }
581
582 /* Init speed if any */
583 if (hu->init_speed)
584 speed = hu->init_speed;
585 else if (hu->proto->init_speed)
586 speed = hu->proto->init_speed;
587 else
588 speed = 0;
589
590 if (speed)
591 host_set_baudrate(hu, speed);
592
593 /* Operational speed if any */
594 if (hu->oper_speed)
595 speed = hu->oper_speed;
596 else if (bcm->dev && bcm->dev->oper_speed)
597 speed = bcm->dev->oper_speed;
598 else if (hu->proto->oper_speed)
599 speed = hu->proto->oper_speed;
600 else
601 speed = 0;
602
603 if (speed) {
604 err = bcm_set_baudrate(hu, speed);
605 if (!err)
606 host_set_baudrate(hu, speed);
607 }
608
609 /* PCM parameters if provided */
610 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
611 struct bcm_set_pcm_int_params params;
612
613 btbcm_read_pcm_int_params(hu->hdev, &params);
614
615 memcpy(&params, bcm->dev->pcm_int_params, 5);
616 btbcm_write_pcm_int_params(hu->hdev, &params);
617 }
618
619 finalize:
620 release_firmware(fw);
621
622 err = btbcm_finalize(hu->hdev);
623 if (err)
624 return err;
625
626 if (!bcm_request_irq(bcm))
627 err = bcm_setup_sleep(hu);
628
629 return err;
630 }
631
632 #define BCM_RECV_LM_DIAG \
633 .type = BCM_LM_DIAG_PKT, \
634 .hlen = BCM_LM_DIAG_SIZE, \
635 .loff = 0, \
636 .lsize = 0, \
637 .maxlen = BCM_LM_DIAG_SIZE
638
639 #define BCM_RECV_NULL \
640 .type = BCM_NULL_PKT, \
641 .hlen = BCM_NULL_SIZE, \
642 .loff = 0, \
643 .lsize = 0, \
644 .maxlen = BCM_NULL_SIZE
645
646 #define BCM_RECV_TYPE49 \
647 .type = BCM_TYPE49_PKT, \
648 .hlen = BCM_TYPE49_SIZE, \
649 .loff = 0, \
650 .lsize = 0, \
651 .maxlen = BCM_TYPE49_SIZE
652
653 #define BCM_RECV_TYPE52 \
654 .type = BCM_TYPE52_PKT, \
655 .hlen = BCM_TYPE52_SIZE, \
656 .loff = 0, \
657 .lsize = 0, \
658 .maxlen = BCM_TYPE52_SIZE
659
660 static const struct h4_recv_pkt bcm_recv_pkts[] = {
661 { H4_RECV_ACL, .recv = hci_recv_frame },
662 { H4_RECV_SCO, .recv = hci_recv_frame },
663 { H4_RECV_EVENT, .recv = hci_recv_frame },
664 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
665 { BCM_RECV_NULL, .recv = hci_recv_diag },
666 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
667 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
668 };
669
670 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
671 {
672 struct bcm_data *bcm = hu->priv;
673
674 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
675 return -EUNATCH;
676
677 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
678 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
679 if (IS_ERR(bcm->rx_skb)) {
680 int err = PTR_ERR(bcm->rx_skb);
681 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
682 bcm->rx_skb = NULL;
683 return err;
684 } else if (!bcm->rx_skb) {
685 /* Delay auto-suspend when receiving completed packet */
686 mutex_lock(&bcm_device_lock);
687 if (bcm->dev && bcm_device_exists(bcm->dev)) {
688 pm_runtime_get(bcm->dev->dev);
689 pm_runtime_mark_last_busy(bcm->dev->dev);
690 pm_runtime_put_autosuspend(bcm->dev->dev);
691 }
692 mutex_unlock(&bcm_device_lock);
693 }
694
695 return count;
696 }
697
698 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
699 {
700 struct bcm_data *bcm = hu->priv;
701
702 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
703
704 /* Prepend skb with frame type */
705 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
706 skb_queue_tail(&bcm->txq, skb);
707
708 return 0;
709 }
710
711 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
712 {
713 struct bcm_data *bcm = hu->priv;
714 struct sk_buff *skb = NULL;
715 struct bcm_device *bdev = NULL;
716
717 mutex_lock(&bcm_device_lock);
718
719 if (bcm_device_exists(bcm->dev)) {
720 bdev = bcm->dev;
721 pm_runtime_get_sync(bdev->dev);
722 /* Shall be resumed here */
723 }
724
725 skb = skb_dequeue(&bcm->txq);
726
727 if (bdev) {
728 pm_runtime_mark_last_busy(bdev->dev);
729 pm_runtime_put_autosuspend(bdev->dev);
730 }
731
732 mutex_unlock(&bcm_device_lock);
733
734 return skb;
735 }
736
737 #ifdef CONFIG_PM
738 static int bcm_suspend_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 if (!bdev->is_suspended && bdev->hu) {
746 hci_uart_set_flow_control(bdev->hu, true);
747
748 /* Once this returns, driver suspends BT via GPIO */
749 bdev->is_suspended = true;
750 }
751
752 /* Suspend the device */
753 err = bdev->set_device_wakeup(bdev, false);
754 if (err) {
755 if (bdev->is_suspended && bdev->hu) {
756 bdev->is_suspended = false;
757 hci_uart_set_flow_control(bdev->hu, false);
758 }
759 return -EBUSY;
760 }
761
762 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
763 msleep(15);
764
765 return 0;
766 }
767
768 static int bcm_resume_device(struct device *dev)
769 {
770 struct bcm_device *bdev = dev_get_drvdata(dev);
771 int err;
772
773 bt_dev_dbg(bdev, "");
774
775 err = bdev->set_device_wakeup(bdev, true);
776 if (err) {
777 dev_err(dev, "Failed to power up\n");
778 return err;
779 }
780
781 bt_dev_dbg(bdev, "resume, delaying 15 ms");
782 msleep(15);
783
784 /* When this executes, the device has woken up already */
785 if (bdev->is_suspended && bdev->hu) {
786 bdev->is_suspended = false;
787
788 hci_uart_set_flow_control(bdev->hu, false);
789 }
790
791 return 0;
792 }
793 #endif
794
795 #ifdef CONFIG_PM_SLEEP
796 /* suspend callback */
797 static int bcm_suspend(struct device *dev)
798 {
799 struct bcm_device *bdev = dev_get_drvdata(dev);
800 int error;
801
802 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
803
804 /*
805 * When used with a device instantiated as platform_device, bcm_suspend
806 * can be called at any time as long as the platform device is bound,
807 * so it should use bcm_device_lock to protect access to hci_uart
808 * and device_wake-up GPIO.
809 */
810 mutex_lock(&bcm_device_lock);
811
812 if (!bdev->hu)
813 goto unlock;
814
815 if (pm_runtime_active(dev))
816 bcm_suspend_device(dev);
817
818 if (device_may_wakeup(dev) && bdev->irq > 0) {
819 error = enable_irq_wake(bdev->irq);
820 if (!error)
821 bt_dev_dbg(bdev, "BCM irq: enabled");
822 }
823
824 unlock:
825 mutex_unlock(&bcm_device_lock);
826
827 return 0;
828 }
829
830 /* resume callback */
831 static int bcm_resume(struct device *dev)
832 {
833 struct bcm_device *bdev = dev_get_drvdata(dev);
834 int err = 0;
835
836 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
837
838 /*
839 * When used with a device instantiated as platform_device, bcm_resume
840 * can be called at any time as long as platform device is bound,
841 * so it should use bcm_device_lock to protect access to hci_uart
842 * and device_wake-up GPIO.
843 */
844 mutex_lock(&bcm_device_lock);
845
846 if (!bdev->hu)
847 goto unlock;
848
849 if (device_may_wakeup(dev) && bdev->irq > 0) {
850 disable_irq_wake(bdev->irq);
851 bt_dev_dbg(bdev, "BCM irq: disabled");
852 }
853
854 err = bcm_resume_device(dev);
855
856 unlock:
857 mutex_unlock(&bcm_device_lock);
858
859 if (!err) {
860 pm_runtime_disable(dev);
861 pm_runtime_set_active(dev);
862 pm_runtime_enable(dev);
863 }
864
865 return 0;
866 }
867 #endif
868
869 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
870 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
871 {
872 .ident = "Meegopad T08",
873 .matches = {
874 DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
875 "To be filled by OEM."),
876 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
877 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
878 },
879 },
880 { }
881 };
882
883 #ifdef CONFIG_ACPI
884 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
885 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
886 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
887
888 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
889 { "device-wakeup-gpios", &first_gpio, 1 },
890 { "shutdown-gpios", &second_gpio, 1 },
891 { "host-wakeup-gpios", &third_gpio, 1 },
892 { },
893 };
894
895 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
896 { "host-wakeup-gpios", &first_gpio, 1 },
897 { "device-wakeup-gpios", &second_gpio, 1 },
898 { "shutdown-gpios", &third_gpio, 1 },
899 { },
900 };
901
902 static int bcm_resource(struct acpi_resource *ares, void *data)
903 {
904 struct bcm_device *dev = data;
905 struct acpi_resource_extended_irq *irq;
906 struct acpi_resource_gpio *gpio;
907 struct acpi_resource_uart_serialbus *sb;
908
909 switch (ares->type) {
910 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
911 irq = &ares->data.extended_irq;
912 if (irq->polarity != ACPI_ACTIVE_LOW)
913 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
914 dev->irq_active_low = true;
915 break;
916
917 case ACPI_RESOURCE_TYPE_GPIO:
918 gpio = &ares->data.gpio;
919 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
920 dev->gpio_int_idx = dev->gpio_count;
921 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
922 }
923 dev->gpio_count++;
924 break;
925
926 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
927 sb = &ares->data.uart_serial_bus;
928 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
929 dev->init_speed = sb->default_baud_rate;
930 dev->oper_speed = 4000000;
931 }
932 break;
933
934 default:
935 break;
936 }
937
938 return 0;
939 }
940
941 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
942 {
943 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
944 return -EIO;
945
946 return 0;
947 }
948
949 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
950 {
951 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
952 NULL, NULL, NULL)))
953 return -EIO;
954
955 return 0;
956 }
957
958 static int bcm_apple_get_resources(struct bcm_device *dev)
959 {
960 struct acpi_device *adev = ACPI_COMPANION(dev->dev);
961 const union acpi_object *obj;
962
963 if (!adev ||
964 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
965 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
966 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
967 return -ENODEV;
968
969 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
970 obj->buffer.length == 8)
971 dev->init_speed = *(u64 *)obj->buffer.pointer;
972
973 dev->set_device_wakeup = bcm_apple_set_device_wakeup;
974 dev->set_shutdown = bcm_apple_set_shutdown;
975
976 return 0;
977 }
978 #else
979 static inline int bcm_apple_get_resources(struct bcm_device *dev)
980 {
981 return -EOPNOTSUPP;
982 }
983 #endif /* CONFIG_ACPI */
984
985 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
986 {
987 gpiod_set_value_cansleep(dev->device_wakeup, awake);
988 return 0;
989 }
990
991 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
992 {
993 gpiod_set_value_cansleep(dev->shutdown, powered);
994 return 0;
995 }
996
997 /* Try a bunch of names for TXCO */
998 static struct clk *bcm_get_txco(struct device *dev)
999 {
1000 struct clk *clk;
1001
1002 /* New explicit name */
1003 clk = devm_clk_get(dev, "txco");
1004 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1005 return clk;
1006
1007 /* Deprecated name */
1008 clk = devm_clk_get(dev, "extclk");
1009 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1010 return clk;
1011
1012 /* Original code used no name at all */
1013 return devm_clk_get(dev, NULL);
1014 }
1015
1016 static int bcm_get_resources(struct bcm_device *dev)
1017 {
1018 const struct dmi_system_id *dmi_id;
1019 int err;
1020
1021 dev->name = dev_name(dev->dev);
1022
1023 if (x86_apple_machine && !bcm_apple_get_resources(dev))
1024 return 0;
1025
1026 dev->txco_clk = bcm_get_txco(dev->dev);
1027
1028 /* Handle deferred probing */
1029 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1030 return PTR_ERR(dev->txco_clk);
1031
1032 /* Ignore all other errors as before */
1033 if (IS_ERR(dev->txco_clk))
1034 dev->txco_clk = NULL;
1035
1036 dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1037 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1038 return PTR_ERR(dev->lpo_clk);
1039
1040 if (IS_ERR(dev->lpo_clk))
1041 dev->lpo_clk = NULL;
1042
1043 /* Check if we accidentally fetched the lpo clock twice */
1044 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1045 devm_clk_put(dev->dev, dev->txco_clk);
1046 dev->txco_clk = NULL;
1047 }
1048
1049 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1050 GPIOD_OUT_LOW);
1051 if (IS_ERR(dev->device_wakeup))
1052 return PTR_ERR(dev->device_wakeup);
1053
1054 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1055 GPIOD_OUT_LOW);
1056 if (IS_ERR(dev->shutdown))
1057 return PTR_ERR(dev->shutdown);
1058
1059 dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1060 dev->set_shutdown = bcm_gpio_set_shutdown;
1061
1062 dev->supplies[0].supply = "vbat";
1063 dev->supplies[1].supply = "vddio";
1064 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1065 dev->supplies);
1066 if (err)
1067 return err;
1068
1069 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1070 if (dev->irq <= 0) {
1071 struct gpio_desc *gpio;
1072
1073 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1074 GPIOD_IN);
1075 if (IS_ERR(gpio))
1076 return PTR_ERR(gpio);
1077
1078 dev->irq = gpiod_to_irq(gpio);
1079 }
1080
1081 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1082 if (dmi_id) {
1083 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1084 dmi_id->ident);
1085 dev->irq = 0;
1086 }
1087
1088 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1089 return 0;
1090 }
1091
1092 #ifdef CONFIG_ACPI
1093 static int bcm_acpi_probe(struct bcm_device *dev)
1094 {
1095 LIST_HEAD(resources);
1096 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1097 struct resource_entry *entry;
1098 int ret;
1099
1100 /* Retrieve UART ACPI info */
1101 dev->gpio_int_idx = -1;
1102 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1103 &resources, bcm_resource, dev);
1104 if (ret < 0)
1105 return ret;
1106
1107 resource_list_for_each_entry(entry, &resources) {
1108 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1109 dev->irq = entry->res->start;
1110 break;
1111 }
1112 }
1113 acpi_dev_free_resource_list(&resources);
1114
1115 /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1116 * only 2 GPIO resources, we use the irq-last mapping for this, since
1117 * we already have an irq the 3th / last mapping will not be used.
1118 */
1119 if (dev->irq)
1120 gpio_mapping = acpi_bcm_int_last_gpios;
1121 else if (dev->gpio_int_idx == 0)
1122 gpio_mapping = acpi_bcm_int_first_gpios;
1123 else if (dev->gpio_int_idx == 2)
1124 gpio_mapping = acpi_bcm_int_last_gpios;
1125 else
1126 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1127 dev->gpio_int_idx);
1128
1129 /* Warn if our expectations are not met. */
1130 if (dev->gpio_count != (dev->irq ? 2 : 3))
1131 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1132 dev->gpio_count);
1133
1134 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1135 if (ret)
1136 return ret;
1137
1138 if (irq_polarity != -1) {
1139 dev->irq_active_low = irq_polarity;
1140 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1141 dev->irq_active_low ? "low" : "high");
1142 }
1143
1144 return 0;
1145 }
1146 #else
1147 static int bcm_acpi_probe(struct bcm_device *dev)
1148 {
1149 return -EINVAL;
1150 }
1151 #endif /* CONFIG_ACPI */
1152
1153 static int bcm_of_probe(struct bcm_device *bdev)
1154 {
1155 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1156 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1157 bdev->pcm_int_params, 5);
1158 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1159 bdev->irq_active_low = irq_get_trigger_type(bdev->irq)
1160 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW);
1161 return 0;
1162 }
1163
1164 static int bcm_probe(struct platform_device *pdev)
1165 {
1166 struct bcm_device *dev;
1167 int ret;
1168
1169 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1170 if (!dev)
1171 return -ENOMEM;
1172
1173 dev->dev = &pdev->dev;
1174 dev->irq = platform_get_irq(pdev, 0);
1175
1176 /* Initialize routing field to an unused value */
1177 dev->pcm_int_params[0] = 0xff;
1178
1179 if (has_acpi_companion(&pdev->dev)) {
1180 ret = bcm_acpi_probe(dev);
1181 if (ret)
1182 return ret;
1183 }
1184
1185 ret = bcm_get_resources(dev);
1186 if (ret)
1187 return ret;
1188
1189 platform_set_drvdata(pdev, dev);
1190
1191 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1192
1193 /* Place this instance on the device list */
1194 mutex_lock(&bcm_device_lock);
1195 list_add_tail(&dev->list, &bcm_device_list);
1196 mutex_unlock(&bcm_device_lock);
1197
1198 ret = bcm_gpio_set_power(dev, false);
1199 if (ret)
1200 dev_err(&pdev->dev, "Failed to power down\n");
1201
1202 return 0;
1203 }
1204
1205 static int bcm_remove(struct platform_device *pdev)
1206 {
1207 struct bcm_device *dev = platform_get_drvdata(pdev);
1208
1209 mutex_lock(&bcm_device_lock);
1210 list_del(&dev->list);
1211 mutex_unlock(&bcm_device_lock);
1212
1213 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1214
1215 return 0;
1216 }
1217
1218 static const struct hci_uart_proto bcm_proto = {
1219 .id = HCI_UART_BCM,
1220 .name = "Broadcom",
1221 .manufacturer = 15,
1222 .init_speed = 115200,
1223 .open = bcm_open,
1224 .close = bcm_close,
1225 .flush = bcm_flush,
1226 .setup = bcm_setup,
1227 .set_baudrate = bcm_set_baudrate,
1228 .recv = bcm_recv,
1229 .enqueue = bcm_enqueue,
1230 .dequeue = bcm_dequeue,
1231 };
1232
1233 #ifdef CONFIG_ACPI
1234 static const struct acpi_device_id bcm_acpi_match[] = {
1235 { "BCM2E00" },
1236 { "BCM2E01" },
1237 { "BCM2E02" },
1238 { "BCM2E03" },
1239 { "BCM2E04" },
1240 { "BCM2E05" },
1241 { "BCM2E06" },
1242 { "BCM2E07" },
1243 { "BCM2E08" },
1244 { "BCM2E09" },
1245 { "BCM2E0A" },
1246 { "BCM2E0B" },
1247 { "BCM2E0C" },
1248 { "BCM2E0D" },
1249 { "BCM2E0E" },
1250 { "BCM2E0F" },
1251 { "BCM2E10" },
1252 { "BCM2E11" },
1253 { "BCM2E12" },
1254 { "BCM2E13" },
1255 { "BCM2E14" },
1256 { "BCM2E15" },
1257 { "BCM2E16" },
1258 { "BCM2E17" },
1259 { "BCM2E18" },
1260 { "BCM2E19" },
1261 { "BCM2E1A" },
1262 { "BCM2E1B" },
1263 { "BCM2E1C" },
1264 { "BCM2E1D" },
1265 { "BCM2E1F" },
1266 { "BCM2E20" },
1267 { "BCM2E21" },
1268 { "BCM2E22" },
1269 { "BCM2E23" },
1270 { "BCM2E24" },
1271 { "BCM2E25" },
1272 { "BCM2E26" },
1273 { "BCM2E27" },
1274 { "BCM2E28" },
1275 { "BCM2E29" },
1276 { "BCM2E2A" },
1277 { "BCM2E2B" },
1278 { "BCM2E2C" },
1279 { "BCM2E2D" },
1280 { "BCM2E2E" },
1281 { "BCM2E2F" },
1282 { "BCM2E30" },
1283 { "BCM2E31" },
1284 { "BCM2E32" },
1285 { "BCM2E33" },
1286 { "BCM2E34" },
1287 { "BCM2E35" },
1288 { "BCM2E36" },
1289 { "BCM2E37" },
1290 { "BCM2E38" },
1291 { "BCM2E39" },
1292 { "BCM2E3A" },
1293 { "BCM2E3B" },
1294 { "BCM2E3C" },
1295 { "BCM2E3D" },
1296 { "BCM2E3E" },
1297 { "BCM2E3F" },
1298 { "BCM2E40" },
1299 { "BCM2E41" },
1300 { "BCM2E42" },
1301 { "BCM2E43" },
1302 { "BCM2E44" },
1303 { "BCM2E45" },
1304 { "BCM2E46" },
1305 { "BCM2E47" },
1306 { "BCM2E48" },
1307 { "BCM2E49" },
1308 { "BCM2E4A" },
1309 { "BCM2E4B" },
1310 { "BCM2E4C" },
1311 { "BCM2E4D" },
1312 { "BCM2E4E" },
1313 { "BCM2E4F" },
1314 { "BCM2E50" },
1315 { "BCM2E51" },
1316 { "BCM2E52" },
1317 { "BCM2E53" },
1318 { "BCM2E54" },
1319 { "BCM2E55" },
1320 { "BCM2E56" },
1321 { "BCM2E57" },
1322 { "BCM2E58" },
1323 { "BCM2E59" },
1324 { "BCM2E5A" },
1325 { "BCM2E5B" },
1326 { "BCM2E5C" },
1327 { "BCM2E5D" },
1328 { "BCM2E5E" },
1329 { "BCM2E5F" },
1330 { "BCM2E60" },
1331 { "BCM2E61" },
1332 { "BCM2E62" },
1333 { "BCM2E63" },
1334 { "BCM2E64" },
1335 { "BCM2E65" },
1336 { "BCM2E66" },
1337 { "BCM2E67" },
1338 { "BCM2E68" },
1339 { "BCM2E69" },
1340 { "BCM2E6B" },
1341 { "BCM2E6D" },
1342 { "BCM2E6E" },
1343 { "BCM2E6F" },
1344 { "BCM2E70" },
1345 { "BCM2E71" },
1346 { "BCM2E72" },
1347 { "BCM2E73" },
1348 { "BCM2E74" },
1349 { "BCM2E75" },
1350 { "BCM2E76" },
1351 { "BCM2E77" },
1352 { "BCM2E78" },
1353 { "BCM2E79" },
1354 { "BCM2E7A" },
1355 { "BCM2E7B" },
1356 { "BCM2E7C" },
1357 { "BCM2E7D" },
1358 { "BCM2E7E" },
1359 { "BCM2E7F" },
1360 { "BCM2E80" },
1361 { "BCM2E81" },
1362 { "BCM2E82" },
1363 { "BCM2E83" },
1364 { "BCM2E84" },
1365 { "BCM2E85" },
1366 { "BCM2E86" },
1367 { "BCM2E87" },
1368 { "BCM2E88" },
1369 { "BCM2E89" },
1370 { "BCM2E8A" },
1371 { "BCM2E8B" },
1372 { "BCM2E8C" },
1373 { "BCM2E8D" },
1374 { "BCM2E8E" },
1375 { "BCM2E90" },
1376 { "BCM2E92" },
1377 { "BCM2E93" },
1378 { "BCM2E94" },
1379 { "BCM2E95" },
1380 { "BCM2E96" },
1381 { "BCM2E97" },
1382 { "BCM2E98" },
1383 { "BCM2E99" },
1384 { "BCM2E9A" },
1385 { "BCM2E9B" },
1386 { "BCM2E9C" },
1387 { "BCM2E9D" },
1388 { "BCM2EA0" },
1389 { "BCM2EA1" },
1390 { "BCM2EA2" },
1391 { "BCM2EA3" },
1392 { "BCM2EA4" },
1393 { "BCM2EA5" },
1394 { "BCM2EA6" },
1395 { "BCM2EA7" },
1396 { "BCM2EA8" },
1397 { "BCM2EA9" },
1398 { "BCM2EAA" },
1399 { "BCM2EAB" },
1400 { "BCM2EAC" },
1401 { },
1402 };
1403 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1404 #endif
1405
1406 /* suspend and resume callbacks */
1407 static const struct dev_pm_ops bcm_pm_ops = {
1408 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1409 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1410 };
1411
1412 static struct platform_driver bcm_driver = {
1413 .probe = bcm_probe,
1414 .remove = bcm_remove,
1415 .driver = {
1416 .name = "hci_bcm",
1417 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1418 .pm = &bcm_pm_ops,
1419 },
1420 };
1421
1422 static int bcm_serdev_probe(struct serdev_device *serdev)
1423 {
1424 struct bcm_device *bcmdev;
1425 const struct bcm_device_data *data;
1426 int err;
1427
1428 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1429 if (!bcmdev)
1430 return -ENOMEM;
1431
1432 bcmdev->dev = &serdev->dev;
1433 #ifdef CONFIG_PM
1434 bcmdev->hu = &bcmdev->serdev_hu;
1435 #endif
1436 bcmdev->serdev_hu.serdev = serdev;
1437 serdev_device_set_drvdata(serdev, bcmdev);
1438
1439 /* Initialize routing field to an unused value */
1440 bcmdev->pcm_int_params[0] = 0xff;
1441
1442 if (has_acpi_companion(&serdev->dev))
1443 err = bcm_acpi_probe(bcmdev);
1444 else
1445 err = bcm_of_probe(bcmdev);
1446 if (err)
1447 return err;
1448
1449 err = bcm_get_resources(bcmdev);
1450 if (err)
1451 return err;
1452
1453 if (!bcmdev->shutdown) {
1454 dev_warn(&serdev->dev,
1455 "No reset resource, using default baud rate\n");
1456 bcmdev->oper_speed = bcmdev->init_speed;
1457 }
1458
1459 err = bcm_gpio_set_power(bcmdev, false);
1460 if (err)
1461 dev_err(&serdev->dev, "Failed to power down\n");
1462
1463 data = device_get_match_data(bcmdev->dev);
1464 if (data) {
1465 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1466 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1467 }
1468
1469 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1470 }
1471
1472 static void bcm_serdev_remove(struct serdev_device *serdev)
1473 {
1474 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1475
1476 hci_uart_unregister_device(&bcmdev->serdev_hu);
1477 }
1478
1479 #ifdef CONFIG_OF
1480 static struct bcm_device_data bcm4354_device_data = {
1481 .no_early_set_baudrate = true,
1482 };
1483
1484 static struct bcm_device_data bcm43438_device_data = {
1485 .drive_rts_on_open = true,
1486 };
1487
1488 static const struct of_device_id bcm_bluetooth_of_match[] = {
1489 { .compatible = "brcm,bcm20702a1" },
1490 { .compatible = "brcm,bcm4329-bt" },
1491 { .compatible = "brcm,bcm4345c5" },
1492 { .compatible = "brcm,bcm4330-bt" },
1493 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1494 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1495 { .compatible = "brcm,bcm4335a0" },
1496 { },
1497 };
1498 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1499 #endif
1500
1501 static struct serdev_device_driver bcm_serdev_driver = {
1502 .probe = bcm_serdev_probe,
1503 .remove = bcm_serdev_remove,
1504 .driver = {
1505 .name = "hci_uart_bcm",
1506 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1507 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1508 .pm = &bcm_pm_ops,
1509 },
1510 };
1511
1512 int __init bcm_init(void)
1513 {
1514 /* For now, we need to keep both platform device
1515 * driver (ACPI generated) and serdev driver (DT).
1516 */
1517 platform_driver_register(&bcm_driver);
1518 serdev_device_driver_register(&bcm_serdev_driver);
1519
1520 return hci_uart_register_proto(&bcm_proto);
1521 }
1522
1523 int __exit bcm_deinit(void)
1524 {
1525 platform_driver_unregister(&bcm_driver);
1526 serdev_device_driver_unregister(&bcm_serdev_driver);
1527
1528 return hci_uart_unregister_proto(&bcm_proto);
1529 }
Linux with added FPC-III support