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/gpio/machine.h>
24 #include <linux/tty.h>
25 #include <linux/interrupt.h>
26 #include <linux/dmi.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/serdev.h>
29
30 #include <net/bluetooth/bluetooth.h>
31 #include <net/bluetooth/hci_core.h>
32
33 #include "btbcm.h"
34 #include "hci_uart.h"
35
36 #define BCM_NULL_PKT 0x00
37 #define BCM_NULL_SIZE 0
38
39 #define BCM_LM_DIAG_PKT 0x07
40 #define BCM_LM_DIAG_SIZE 63
41
42 #define BCM_TYPE49_PKT 0x31
43 #define BCM_TYPE49_SIZE 0
44
45 #define BCM_TYPE52_PKT 0x34
46 #define BCM_TYPE52_SIZE 0
47
48 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
49
50 #define BCM_NUM_SUPPLIES 2
51
52 /**
53 * struct bcm_device_data - device specific data
54 * @no_early_set_baudrate: Disallow set baudrate before driver setup()
55 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
56 * @max_autobaud_speed: max baudrate supported by device in autobaud mode
57 */
58 struct bcm_device_data {
59 bool no_early_set_baudrate;
60 bool drive_rts_on_open;
61 u32 max_autobaud_speed;
62 };
63
64 /**
65 * struct bcm_device - device driver resources
66 * @serdev_hu: HCI UART controller struct
67 * @list: bcm_device_list node
68 * @dev: physical UART slave
69 * @name: device name logged by bt_dev_*() functions
70 * @device_wakeup: BT_WAKE pin,
71 * assert = Bluetooth device must wake up or remain awake,
72 * deassert = Bluetooth device may sleep when sleep criteria are met
73 * @shutdown: BT_REG_ON pin,
74 * power up or power down Bluetooth device internal regulators
75 * @reset: BT_RST_N pin,
76 * active low resets the Bluetooth logic core
77 * @set_device_wakeup: callback to toggle BT_WAKE pin
78 * either by accessing @device_wakeup or by calling @btlp
79 * @set_shutdown: callback to toggle BT_REG_ON pin
80 * either by accessing @shutdown or by calling @btpu/@btpd
81 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
82 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
83 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
84 * @gpio_count: internal counter for GPIO resources associated with ACPI device
85 * @gpio_int_idx: index in _CRS for GpioInt() resource
86 * @txco_clk: external reference frequency clock used by Bluetooth device
87 * @lpo_clk: external LPO clock used by Bluetooth device
88 * @supplies: VBAT and VDDIO supplies used by Bluetooth device
89 * @res_enabled: whether clocks and supplies are prepared and enabled
90 * @init_speed: default baudrate of Bluetooth device;
91 * the host UART is initially set to this baudrate so that
92 * it can configure the Bluetooth device for @oper_speed
93 * @oper_speed: preferred baudrate of Bluetooth device;
94 * set to 0 if @init_speed is already the preferred baudrate
95 * @irq: interrupt triggered by HOST_WAKE_BT pin
96 * @irq_active_low: whether @irq is active low
97 * @irq_acquired: flag to show if IRQ handler has been assigned
98 * @hu: pointer to HCI UART controller struct,
99 * used to disable flow control during runtime suspend and system sleep
100 * @is_suspended: whether flow control is currently disabled
101 * @no_early_set_baudrate: don't set_baudrate before setup()
102 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
103 * @pcm_int_params: keep the initial PCM configuration
104 * @use_autobaud_mode: start Bluetooth device in autobaud mode
105 * @max_autobaud_speed: max baudrate supported by device in autobaud mode
106 */
107 struct bcm_device {
108 /* Must be the first member, hci_serdev.c expects this. */
109 struct hci_uart serdev_hu;
110 struct list_head list;
111
112 struct device *dev;
113
114 const char *name;
115 struct gpio_desc *device_wakeup;
116 struct gpio_desc *shutdown;
117 struct gpio_desc *reset;
118 int (*set_device_wakeup)(struct bcm_device *, bool);
119 int (*set_shutdown)(struct bcm_device *, bool);
120 #ifdef CONFIG_ACPI
121 acpi_handle btlp, btpu, btpd;
122 int gpio_count;
123 int gpio_int_idx;
124 #endif
125
126 struct clk *txco_clk;
127 struct clk *lpo_clk;
128 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
129 bool res_enabled;
130
131 u32 init_speed;
132 u32 oper_speed;
133 int irq;
134 bool irq_active_low;
135 bool irq_acquired;
136
137 #ifdef CONFIG_PM
138 struct hci_uart *hu;
139 bool is_suspended;
140 #endif
141 bool no_early_set_baudrate;
142 bool drive_rts_on_open;
143 bool use_autobaud_mode;
144 u8 pcm_int_params[5];
145 u32 max_autobaud_speed;
146 };
147
148 /* generic bcm uart resources */
149 struct bcm_data {
150 struct sk_buff *rx_skb;
151 struct sk_buff_head txq;
152
153 struct bcm_device *dev;
154 };
155
156 /* List of BCM BT UART devices */
157 static DEFINE_MUTEX(bcm_device_lock);
158 static LIST_HEAD(bcm_device_list);
159
160 static int irq_polarity = -1;
161 module_param(irq_polarity, int, 0444);
162 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
163
host_set_baudrate(struct hci_uart * hu,unsigned int speed)164 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
165 {
166 if (hu->serdev)
167 serdev_device_set_baudrate(hu->serdev, speed);
168 else
169 hci_uart_set_baudrate(hu, speed);
170 }
171
bcm_set_baudrate(struct hci_uart * hu,unsigned int speed)172 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
173 {
174 struct hci_dev *hdev = hu->hdev;
175 struct sk_buff *skb;
176 struct bcm_update_uart_baud_rate param;
177
178 if (speed > 3000000) {
179 struct bcm_write_uart_clock_setting clock;
180
181 clock.type = BCM_UART_CLOCK_48MHZ;
182
183 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
184
185 /* This Broadcom specific command changes the UART's controller
186 * clock for baud rate > 3000000.
187 */
188 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
189 if (IS_ERR(skb)) {
190 int err = PTR_ERR(skb);
191 bt_dev_err(hdev, "BCM: failed to write clock (%d)",
192 err);
193 return err;
194 }
195
196 kfree_skb(skb);
197 }
198
199 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
200
201 param.zero = cpu_to_le16(0);
202 param.baud_rate = cpu_to_le32(speed);
203
204 /* This Broadcom specific command changes the UART's controller baud
205 * rate.
206 */
207 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m,
208 HCI_INIT_TIMEOUT);
209 if (IS_ERR(skb)) {
210 int err = PTR_ERR(skb);
211 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
212 err);
213 return err;
214 }
215
216 kfree_skb(skb);
217
218 return 0;
219 }
220
221 /* bcm_device_exists should be protected by bcm_device_lock */
bcm_device_exists(struct bcm_device * device)222 static bool bcm_device_exists(struct bcm_device *device)
223 {
224 struct list_head *p;
225
226 #ifdef CONFIG_PM
227 /* Devices using serdev always exist */
228 if (device && device->hu && device->hu->serdev)
229 return true;
230 #endif
231
232 list_for_each(p, &bcm_device_list) {
233 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
234
235 if (device == dev)
236 return true;
237 }
238
239 return false;
240 }
241
bcm_gpio_set_power(struct bcm_device * dev,bool powered)242 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
243 {
244 int err;
245
246 if (powered && !dev->res_enabled) {
247 /* Intel Macs use bcm_apple_get_resources() and don't
248 * have regulator supplies configured.
249 */
250 if (dev->supplies[0].supply) {
251 err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
252 dev->supplies);
253 if (err)
254 return err;
255 }
256
257 /* LPO clock needs to be 32.768 kHz */
258 err = clk_set_rate(dev->lpo_clk, 32768);
259 if (err) {
260 dev_err(dev->dev, "Could not set LPO clock rate\n");
261 goto err_regulator_disable;
262 }
263
264 err = clk_prepare_enable(dev->lpo_clk);
265 if (err)
266 goto err_regulator_disable;
267
268 err = clk_prepare_enable(dev->txco_clk);
269 if (err)
270 goto err_lpo_clk_disable;
271 }
272
273 err = dev->set_shutdown(dev, powered);
274 if (err)
275 goto err_txco_clk_disable;
276
277 err = dev->set_device_wakeup(dev, powered);
278 if (err)
279 goto err_revert_shutdown;
280
281 if (!powered && dev->res_enabled) {
282 clk_disable_unprepare(dev->txco_clk);
283 clk_disable_unprepare(dev->lpo_clk);
284
285 /* Intel Macs use bcm_apple_get_resources() and don't
286 * have regulator supplies configured.
287 */
288 if (dev->supplies[0].supply)
289 regulator_bulk_disable(BCM_NUM_SUPPLIES,
290 dev->supplies);
291 }
292
293 /* wait for device to power on and come out of reset */
294 usleep_range(100000, 120000);
295
296 dev->res_enabled = powered;
297
298 return 0;
299
300 err_revert_shutdown:
301 dev->set_shutdown(dev, !powered);
302 err_txco_clk_disable:
303 if (powered && !dev->res_enabled)
304 clk_disable_unprepare(dev->txco_clk);
305 err_lpo_clk_disable:
306 if (powered && !dev->res_enabled)
307 clk_disable_unprepare(dev->lpo_clk);
308 err_regulator_disable:
309 if (powered && !dev->res_enabled)
310 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
311 return err;
312 }
313
314 #ifdef CONFIG_PM
bcm_host_wake(int irq,void * data)315 static irqreturn_t bcm_host_wake(int irq, void *data)
316 {
317 struct bcm_device *bdev = data;
318
319 bt_dev_dbg(bdev, "Host wake IRQ");
320
321 pm_runtime_get(bdev->dev);
322 pm_runtime_mark_last_busy(bdev->dev);
323 pm_runtime_put_autosuspend(bdev->dev);
324
325 return IRQ_HANDLED;
326 }
327
bcm_request_irq(struct bcm_data * bcm)328 static int bcm_request_irq(struct bcm_data *bcm)
329 {
330 struct bcm_device *bdev = bcm->dev;
331 int err;
332
333 mutex_lock(&bcm_device_lock);
334 if (!bcm_device_exists(bdev)) {
335 err = -ENODEV;
336 goto unlock;
337 }
338
339 if (bdev->irq <= 0) {
340 err = -EOPNOTSUPP;
341 goto unlock;
342 }
343
344 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
345 bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
346 IRQF_TRIGGER_RISING,
347 "host_wake", bdev);
348 if (err) {
349 bdev->irq = err;
350 goto unlock;
351 }
352
353 bdev->irq_acquired = true;
354
355 device_init_wakeup(bdev->dev, true);
356
357 pm_runtime_set_autosuspend_delay(bdev->dev,
358 BCM_AUTOSUSPEND_DELAY);
359 pm_runtime_use_autosuspend(bdev->dev);
360 pm_runtime_set_active(bdev->dev);
361 pm_runtime_enable(bdev->dev);
362
363 unlock:
364 mutex_unlock(&bcm_device_lock);
365
366 return err;
367 }
368
369 static const struct bcm_set_sleep_mode default_sleep_params = {
370 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
371 .idle_host = 2, /* idle threshold HOST, in 300ms */
372 .idle_dev = 2, /* idle threshold device, in 300ms */
373 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
374 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
375 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
376 .combine_modes = 1, /* Combine sleep and LPM flag */
377 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
378 /* Irrelevant USB flags */
379 .usb_auto_sleep = 0,
380 .usb_resume_timeout = 0,
381 .break_to_host = 0,
382 .pulsed_host_wake = 1,
383 };
384
bcm_setup_sleep(struct hci_uart * hu)385 static int bcm_setup_sleep(struct hci_uart *hu)
386 {
387 struct bcm_data *bcm = hu->priv;
388 struct sk_buff *skb;
389 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
390
391 sleep_params.host_wake_active = !bcm->dev->irq_active_low;
392
393 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
394 &sleep_params, HCI_INIT_TIMEOUT);
395 if (IS_ERR(skb)) {
396 int err = PTR_ERR(skb);
397 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
398 return err;
399 }
400 kfree_skb(skb);
401
402 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
403
404 return 0;
405 }
406 #else
bcm_request_irq(struct bcm_data * bcm)407 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
bcm_setup_sleep(struct hci_uart * hu)408 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
409 #endif
410
bcm_set_diag(struct hci_dev * hdev,bool enable)411 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
412 {
413 struct hci_uart *hu = hci_get_drvdata(hdev);
414 struct bcm_data *bcm = hu->priv;
415 struct sk_buff *skb;
416
417 if (!test_bit(HCI_RUNNING, &hdev->flags))
418 return -ENETDOWN;
419
420 skb = bt_skb_alloc(3, GFP_KERNEL);
421 if (!skb)
422 return -ENOMEM;
423
424 skb_put_u8(skb, BCM_LM_DIAG_PKT);
425 skb_put_u8(skb, 0xf0);
426 skb_put_u8(skb, enable);
427
428 skb_queue_tail(&bcm->txq, skb);
429 hci_uart_tx_wakeup(hu);
430
431 return 0;
432 }
433
bcm_open(struct hci_uart * hu)434 static int bcm_open(struct hci_uart *hu)
435 {
436 struct bcm_data *bcm;
437 struct list_head *p;
438 int err;
439
440 bt_dev_dbg(hu->hdev, "hu %p", hu);
441
442 if (!hci_uart_has_flow_control(hu))
443 return -EOPNOTSUPP;
444
445 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
446 if (!bcm)
447 return -ENOMEM;
448
449 skb_queue_head_init(&bcm->txq);
450
451 hu->priv = bcm;
452
453 mutex_lock(&bcm_device_lock);
454
455 if (hu->serdev) {
456 bcm->dev = serdev_device_get_drvdata(hu->serdev);
457 goto out;
458 }
459
460 if (!hu->tty->dev)
461 goto out;
462
463 list_for_each(p, &bcm_device_list) {
464 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
465
466 /* Retrieve saved bcm_device based on parent of the
467 * platform device (saved during device probe) and
468 * parent of tty device used by hci_uart
469 */
470 if (hu->tty->dev->parent == dev->dev->parent) {
471 bcm->dev = dev;
472 #ifdef CONFIG_PM
473 dev->hu = hu;
474 #endif
475 break;
476 }
477 }
478
479 out:
480 if (bcm->dev) {
481 if (bcm->dev->use_autobaud_mode)
482 hci_uart_set_flow_control(hu, false); /* Assert BT_UART_CTS_N */
483 else if (bcm->dev->drive_rts_on_open)
484 hci_uart_set_flow_control(hu, true);
485
486 if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed)
487 hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed);
488 else
489 hu->init_speed = bcm->dev->init_speed;
490
491 /* If oper_speed is set, ldisc/serdev will set the baudrate
492 * before calling setup()
493 */
494 if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode)
495 hu->oper_speed = bcm->dev->oper_speed;
496
497 err = bcm_gpio_set_power(bcm->dev, true);
498
499 if (bcm->dev->drive_rts_on_open)
500 hci_uart_set_flow_control(hu, false);
501
502 if (err)
503 goto err_unset_hu;
504 }
505
506 mutex_unlock(&bcm_device_lock);
507 return 0;
508
509 err_unset_hu:
510 #ifdef CONFIG_PM
511 if (!hu->serdev)
512 bcm->dev->hu = NULL;
513 #endif
514 mutex_unlock(&bcm_device_lock);
515 hu->priv = NULL;
516 kfree(bcm);
517 return err;
518 }
519
bcm_close(struct hci_uart * hu)520 static int bcm_close(struct hci_uart *hu)
521 {
522 struct bcm_data *bcm = hu->priv;
523 struct bcm_device *bdev = NULL;
524 int err;
525
526 bt_dev_dbg(hu->hdev, "hu %p", hu);
527
528 /* Protect bcm->dev against removal of the device or driver */
529 mutex_lock(&bcm_device_lock);
530
531 if (hu->serdev) {
532 bdev = serdev_device_get_drvdata(hu->serdev);
533 } else if (bcm_device_exists(bcm->dev)) {
534 bdev = bcm->dev;
535 #ifdef CONFIG_PM
536 bdev->hu = NULL;
537 #endif
538 }
539
540 if (bdev) {
541 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) {
542 devm_free_irq(bdev->dev, bdev->irq, bdev);
543 device_init_wakeup(bdev->dev, false);
544 pm_runtime_disable(bdev->dev);
545 }
546
547 err = bcm_gpio_set_power(bdev, false);
548 if (err)
549 bt_dev_err(hu->hdev, "Failed to power down");
550 else
551 pm_runtime_set_suspended(bdev->dev);
552 }
553 mutex_unlock(&bcm_device_lock);
554
555 skb_queue_purge(&bcm->txq);
556 kfree_skb(bcm->rx_skb);
557 kfree(bcm);
558
559 hu->priv = NULL;
560 return 0;
561 }
562
bcm_flush(struct hci_uart * hu)563 static int bcm_flush(struct hci_uart *hu)
564 {
565 struct bcm_data *bcm = hu->priv;
566
567 bt_dev_dbg(hu->hdev, "hu %p", hu);
568
569 skb_queue_purge(&bcm->txq);
570
571 return 0;
572 }
573
bcm_setup(struct hci_uart * hu)574 static int bcm_setup(struct hci_uart *hu)
575 {
576 struct bcm_data *bcm = hu->priv;
577 bool fw_load_done = false;
578 bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0);
579 unsigned int speed;
580 int err;
581
582 bt_dev_dbg(hu->hdev, "hu %p", hu);
583
584 hu->hdev->set_diag = bcm_set_diag;
585 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
586
587 err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode);
588 if (err)
589 return err;
590
591 if (!fw_load_done)
592 return 0;
593
594 /* Init speed if any */
595 if (bcm->dev && bcm->dev->init_speed)
596 speed = bcm->dev->init_speed;
597 else if (hu->proto->init_speed)
598 speed = hu->proto->init_speed;
599 else
600 speed = 0;
601
602 if (speed)
603 host_set_baudrate(hu, speed);
604
605 /* Operational speed if any */
606 if (hu->oper_speed)
607 speed = hu->oper_speed;
608 else if (bcm->dev && bcm->dev->oper_speed)
609 speed = bcm->dev->oper_speed;
610 else if (hu->proto->oper_speed)
611 speed = hu->proto->oper_speed;
612 else
613 speed = 0;
614
615 if (speed) {
616 err = bcm_set_baudrate(hu, speed);
617 if (!err)
618 host_set_baudrate(hu, speed);
619 }
620
621 /* PCM parameters if provided */
622 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
623 struct bcm_set_pcm_int_params params;
624
625 btbcm_read_pcm_int_params(hu->hdev, ¶ms);
626
627 memcpy(¶ms, bcm->dev->pcm_int_params, 5);
628 btbcm_write_pcm_int_params(hu->hdev, ¶ms);
629 }
630
631 err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode);
632 if (err)
633 return err;
634
635 /* Some devices ship with the controller default address.
636 * Allow the bootloader to set a valid address through the
637 * device tree.
638 */
639 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
640
641 if (!bcm_request_irq(bcm))
642 err = bcm_setup_sleep(hu);
643
644 return err;
645 }
646
647 #define BCM_RECV_LM_DIAG \
648 .type = BCM_LM_DIAG_PKT, \
649 .hlen = BCM_LM_DIAG_SIZE, \
650 .loff = 0, \
651 .lsize = 0, \
652 .maxlen = BCM_LM_DIAG_SIZE
653
654 #define BCM_RECV_NULL \
655 .type = BCM_NULL_PKT, \
656 .hlen = BCM_NULL_SIZE, \
657 .loff = 0, \
658 .lsize = 0, \
659 .maxlen = BCM_NULL_SIZE
660
661 #define BCM_RECV_TYPE49 \
662 .type = BCM_TYPE49_PKT, \
663 .hlen = BCM_TYPE49_SIZE, \
664 .loff = 0, \
665 .lsize = 0, \
666 .maxlen = BCM_TYPE49_SIZE
667
668 #define BCM_RECV_TYPE52 \
669 .type = BCM_TYPE52_PKT, \
670 .hlen = BCM_TYPE52_SIZE, \
671 .loff = 0, \
672 .lsize = 0, \
673 .maxlen = BCM_TYPE52_SIZE
674
675 static const struct h4_recv_pkt bcm_recv_pkts[] = {
676 { H4_RECV_ACL, .recv = hci_recv_frame },
677 { H4_RECV_SCO, .recv = hci_recv_frame },
678 { H4_RECV_EVENT, .recv = hci_recv_frame },
679 { H4_RECV_ISO, .recv = hci_recv_frame },
680 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
681 { BCM_RECV_NULL, .recv = hci_recv_diag },
682 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
683 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
684 };
685
bcm_recv(struct hci_uart * hu,const void * data,int count)686 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
687 {
688 struct bcm_data *bcm = hu->priv;
689
690 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
691 return -EUNATCH;
692
693 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
694 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
695 if (IS_ERR(bcm->rx_skb)) {
696 int err = PTR_ERR(bcm->rx_skb);
697 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
698 bcm->rx_skb = NULL;
699 return err;
700 } else if (!bcm->rx_skb) {
701 /* Delay auto-suspend when receiving completed packet */
702 mutex_lock(&bcm_device_lock);
703 if (bcm->dev && bcm_device_exists(bcm->dev)) {
704 pm_runtime_get(bcm->dev->dev);
705 pm_runtime_mark_last_busy(bcm->dev->dev);
706 pm_runtime_put_autosuspend(bcm->dev->dev);
707 }
708 mutex_unlock(&bcm_device_lock);
709 }
710
711 return count;
712 }
713
bcm_enqueue(struct hci_uart * hu,struct sk_buff * skb)714 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
715 {
716 struct bcm_data *bcm = hu->priv;
717
718 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
719
720 /* Prepend skb with frame type */
721 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
722 skb_queue_tail(&bcm->txq, skb);
723
724 return 0;
725 }
726
bcm_dequeue(struct hci_uart * hu)727 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
728 {
729 struct bcm_data *bcm = hu->priv;
730 struct sk_buff *skb = NULL;
731 struct bcm_device *bdev = NULL;
732
733 mutex_lock(&bcm_device_lock);
734
735 if (bcm_device_exists(bcm->dev)) {
736 bdev = bcm->dev;
737 pm_runtime_get_sync(bdev->dev);
738 /* Shall be resumed here */
739 }
740
741 skb = skb_dequeue(&bcm->txq);
742
743 if (bdev) {
744 pm_runtime_mark_last_busy(bdev->dev);
745 pm_runtime_put_autosuspend(bdev->dev);
746 }
747
748 mutex_unlock(&bcm_device_lock);
749
750 return skb;
751 }
752
753 #ifdef CONFIG_PM
bcm_suspend_device(struct device * dev)754 static int bcm_suspend_device(struct device *dev)
755 {
756 struct bcm_device *bdev = dev_get_drvdata(dev);
757 int err;
758
759 bt_dev_dbg(bdev, "");
760
761 if (!bdev->is_suspended && bdev->hu) {
762 hci_uart_set_flow_control(bdev->hu, true);
763
764 /* Once this returns, driver suspends BT via GPIO */
765 bdev->is_suspended = true;
766 }
767
768 /* Suspend the device */
769 err = bdev->set_device_wakeup(bdev, false);
770 if (err) {
771 if (bdev->is_suspended && bdev->hu) {
772 bdev->is_suspended = false;
773 hci_uart_set_flow_control(bdev->hu, false);
774 }
775 return -EBUSY;
776 }
777
778 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
779 msleep(15);
780
781 return 0;
782 }
783
bcm_resume_device(struct device * dev)784 static int bcm_resume_device(struct device *dev)
785 {
786 struct bcm_device *bdev = dev_get_drvdata(dev);
787 int err;
788
789 bt_dev_dbg(bdev, "");
790
791 err = bdev->set_device_wakeup(bdev, true);
792 if (err) {
793 dev_err(dev, "Failed to power up\n");
794 return err;
795 }
796
797 bt_dev_dbg(bdev, "resume, delaying 15 ms");
798 msleep(15);
799
800 /* When this executes, the device has woken up already */
801 if (bdev->is_suspended && bdev->hu) {
802 bdev->is_suspended = false;
803
804 hci_uart_set_flow_control(bdev->hu, false);
805 }
806
807 return 0;
808 }
809 #endif
810
811 #ifdef CONFIG_PM_SLEEP
812 /* suspend callback */
bcm_suspend(struct device * dev)813 static int bcm_suspend(struct device *dev)
814 {
815 struct bcm_device *bdev = dev_get_drvdata(dev);
816 int error;
817
818 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
819
820 /*
821 * When used with a device instantiated as platform_device, bcm_suspend
822 * can be called at any time as long as the platform device is bound,
823 * so it should use bcm_device_lock to protect access to hci_uart
824 * and device_wake-up GPIO.
825 */
826 mutex_lock(&bcm_device_lock);
827
828 if (!bdev->hu)
829 goto unlock;
830
831 if (pm_runtime_active(dev))
832 bcm_suspend_device(dev);
833
834 if (device_may_wakeup(dev) && bdev->irq > 0) {
835 error = enable_irq_wake(bdev->irq);
836 if (!error)
837 bt_dev_dbg(bdev, "BCM irq: enabled");
838 }
839
840 unlock:
841 mutex_unlock(&bcm_device_lock);
842
843 return 0;
844 }
845
846 /* resume callback */
bcm_resume(struct device * dev)847 static int bcm_resume(struct device *dev)
848 {
849 struct bcm_device *bdev = dev_get_drvdata(dev);
850 int err = 0;
851
852 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
853
854 /*
855 * When used with a device instantiated as platform_device, bcm_resume
856 * can be called at any time as long as platform device is bound,
857 * so it should use bcm_device_lock to protect access to hci_uart
858 * and device_wake-up GPIO.
859 */
860 mutex_lock(&bcm_device_lock);
861
862 if (!bdev->hu)
863 goto unlock;
864
865 if (device_may_wakeup(dev) && bdev->irq > 0) {
866 disable_irq_wake(bdev->irq);
867 bt_dev_dbg(bdev, "BCM irq: disabled");
868 }
869
870 err = bcm_resume_device(dev);
871
872 unlock:
873 mutex_unlock(&bcm_device_lock);
874
875 if (!err) {
876 pm_runtime_disable(dev);
877 pm_runtime_set_active(dev);
878 pm_runtime_enable(dev);
879 }
880
881 return 0;
882 }
883 #endif
884
885 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
886 static struct gpiod_lookup_table asus_tf103c_irq_gpios = {
887 .dev_id = "serial0-0",
888 .table = {
889 GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH),
890 { }
891 },
892 };
893
894 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
895 {
896 .ident = "Asus TF103C",
897 .matches = {
898 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
899 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
900 },
901 .driver_data = &asus_tf103c_irq_gpios,
902 },
903 {
904 .ident = "Meegopad T08",
905 .matches = {
906 DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
907 "To be filled by OEM."),
908 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
909 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
910 },
911 },
912 { }
913 };
914
915 #ifdef CONFIG_ACPI
916 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
917 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
918 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
919
920 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
921 { "device-wakeup-gpios", &first_gpio, 1 },
922 { "shutdown-gpios", &second_gpio, 1 },
923 { "host-wakeup-gpios", &third_gpio, 1 },
924 { },
925 };
926
927 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
928 { "host-wakeup-gpios", &first_gpio, 1 },
929 { "device-wakeup-gpios", &second_gpio, 1 },
930 { "shutdown-gpios", &third_gpio, 1 },
931 { },
932 };
933
bcm_resource(struct acpi_resource * ares,void * data)934 static int bcm_resource(struct acpi_resource *ares, void *data)
935 {
936 struct bcm_device *dev = data;
937 struct acpi_resource_extended_irq *irq;
938 struct acpi_resource_gpio *gpio;
939 struct acpi_resource_uart_serialbus *sb;
940
941 switch (ares->type) {
942 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
943 irq = &ares->data.extended_irq;
944 if (irq->polarity != ACPI_ACTIVE_LOW)
945 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
946 dev->irq_active_low = true;
947 break;
948
949 case ACPI_RESOURCE_TYPE_GPIO:
950 gpio = &ares->data.gpio;
951 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
952 dev->gpio_int_idx = dev->gpio_count;
953 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
954 }
955 dev->gpio_count++;
956 break;
957
958 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
959 sb = &ares->data.uart_serial_bus;
960 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
961 dev->init_speed = sb->default_baud_rate;
962 dev->oper_speed = 4000000;
963 }
964 break;
965
966 default:
967 break;
968 }
969
970 return 0;
971 }
972
bcm_apple_set_device_wakeup(struct bcm_device * dev,bool awake)973 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
974 {
975 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
976 return -EIO;
977
978 return 0;
979 }
980
bcm_apple_set_shutdown(struct bcm_device * dev,bool powered)981 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
982 {
983 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
984 NULL, NULL, NULL)))
985 return -EIO;
986
987 return 0;
988 }
989
bcm_apple_get_resources(struct bcm_device * dev)990 static int bcm_apple_get_resources(struct bcm_device *dev)
991 {
992 struct acpi_device *adev = ACPI_COMPANION(dev->dev);
993 const union acpi_object *obj;
994
995 if (!adev ||
996 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
997 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
998 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
999 return -ENODEV;
1000
1001 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
1002 obj->buffer.length == 8)
1003 dev->init_speed = *(u64 *)obj->buffer.pointer;
1004
1005 dev->set_device_wakeup = bcm_apple_set_device_wakeup;
1006 dev->set_shutdown = bcm_apple_set_shutdown;
1007
1008 return 0;
1009 }
1010 #else
bcm_apple_get_resources(struct bcm_device * dev)1011 static inline int bcm_apple_get_resources(struct bcm_device *dev)
1012 {
1013 return -EOPNOTSUPP;
1014 }
1015 #endif /* CONFIG_ACPI */
1016
bcm_gpio_set_device_wakeup(struct bcm_device * dev,bool awake)1017 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
1018 {
1019 gpiod_set_value_cansleep(dev->device_wakeup, awake);
1020 return 0;
1021 }
1022
bcm_gpio_set_shutdown(struct bcm_device * dev,bool powered)1023 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
1024 {
1025 gpiod_set_value_cansleep(dev->shutdown, powered);
1026 if (dev->reset)
1027 /*
1028 * The reset line is asserted on powerdown and deasserted
1029 * on poweron so the inverse of powered is used. Notice
1030 * that the GPIO line BT_RST_N needs to be specified as
1031 * active low in the device tree or similar system
1032 * description.
1033 */
1034 gpiod_set_value_cansleep(dev->reset, !powered);
1035 return 0;
1036 }
1037
1038 /* Try a bunch of names for TXCO */
bcm_get_txco(struct device * dev)1039 static struct clk *bcm_get_txco(struct device *dev)
1040 {
1041 struct clk *clk;
1042
1043 /* New explicit name */
1044 clk = devm_clk_get(dev, "txco");
1045 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1046 return clk;
1047
1048 /* Deprecated name */
1049 clk = devm_clk_get(dev, "extclk");
1050 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1051 return clk;
1052
1053 /* Original code used no name at all */
1054 return devm_clk_get(dev, NULL);
1055 }
1056
bcm_get_resources(struct bcm_device * dev)1057 static int bcm_get_resources(struct bcm_device *dev)
1058 {
1059 const struct dmi_system_id *broken_irq_dmi_id;
1060 const char *irq_con_id = "host-wakeup";
1061 int err;
1062
1063 dev->name = dev_name(dev->dev);
1064
1065 if (x86_apple_machine && !bcm_apple_get_resources(dev))
1066 return 0;
1067
1068 dev->txco_clk = bcm_get_txco(dev->dev);
1069
1070 /* Handle deferred probing */
1071 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1072 return PTR_ERR(dev->txco_clk);
1073
1074 /* Ignore all other errors as before */
1075 if (IS_ERR(dev->txco_clk))
1076 dev->txco_clk = NULL;
1077
1078 dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1079 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1080 return PTR_ERR(dev->lpo_clk);
1081
1082 if (IS_ERR(dev->lpo_clk))
1083 dev->lpo_clk = NULL;
1084
1085 /* Check if we accidentally fetched the lpo clock twice */
1086 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1087 devm_clk_put(dev->dev, dev->txco_clk);
1088 dev->txco_clk = NULL;
1089 }
1090
1091 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1092 GPIOD_OUT_LOW);
1093 if (IS_ERR(dev->device_wakeup))
1094 return PTR_ERR(dev->device_wakeup);
1095
1096 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1097 GPIOD_OUT_LOW);
1098 if (IS_ERR(dev->shutdown))
1099 return PTR_ERR(dev->shutdown);
1100
1101 dev->reset = devm_gpiod_get_optional(dev->dev, "reset",
1102 GPIOD_OUT_LOW);
1103 if (IS_ERR(dev->reset))
1104 return PTR_ERR(dev->reset);
1105
1106 dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1107 dev->set_shutdown = bcm_gpio_set_shutdown;
1108
1109 dev->supplies[0].supply = "vbat";
1110 dev->supplies[1].supply = "vddio";
1111 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1112 dev->supplies);
1113 if (err)
1114 return err;
1115
1116 broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1117 if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) {
1118 gpiod_add_lookup_table(broken_irq_dmi_id->driver_data);
1119 irq_con_id = "host-wakeup-alt";
1120 dev->irq_active_low = false;
1121 dev->irq = 0;
1122 }
1123
1124 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1125 if (dev->irq <= 0) {
1126 struct gpio_desc *gpio;
1127
1128 gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN);
1129 if (IS_ERR(gpio))
1130 return PTR_ERR(gpio);
1131
1132 dev->irq = gpiod_to_irq(gpio);
1133 }
1134
1135 if (broken_irq_dmi_id) {
1136 if (broken_irq_dmi_id->driver_data) {
1137 gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data);
1138 } else {
1139 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1140 broken_irq_dmi_id->ident);
1141 dev->irq = 0;
1142 }
1143 }
1144
1145 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1146 return 0;
1147 }
1148
1149 #ifdef CONFIG_ACPI
bcm_acpi_probe(struct bcm_device * dev)1150 static int bcm_acpi_probe(struct bcm_device *dev)
1151 {
1152 LIST_HEAD(resources);
1153 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1154 struct resource_entry *entry;
1155 int ret;
1156
1157 /* Retrieve UART ACPI info */
1158 dev->gpio_int_idx = -1;
1159 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1160 &resources, bcm_resource, dev);
1161 if (ret < 0)
1162 return ret;
1163
1164 resource_list_for_each_entry(entry, &resources) {
1165 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1166 dev->irq = entry->res->start;
1167 break;
1168 }
1169 }
1170 acpi_dev_free_resource_list(&resources);
1171
1172 /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1173 * only 2 GPIO resources, we use the irq-last mapping for this, since
1174 * we already have an irq the 3th / last mapping will not be used.
1175 */
1176 if (dev->irq)
1177 gpio_mapping = acpi_bcm_int_last_gpios;
1178 else if (dev->gpio_int_idx == 0)
1179 gpio_mapping = acpi_bcm_int_first_gpios;
1180 else if (dev->gpio_int_idx == 2)
1181 gpio_mapping = acpi_bcm_int_last_gpios;
1182 else
1183 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1184 dev->gpio_int_idx);
1185
1186 /* Warn if our expectations are not met. */
1187 if (dev->gpio_count != (dev->irq ? 2 : 3))
1188 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1189 dev->gpio_count);
1190
1191 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1192 if (ret)
1193 return ret;
1194
1195 if (irq_polarity != -1) {
1196 dev->irq_active_low = irq_polarity;
1197 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1198 dev->irq_active_low ? "low" : "high");
1199 }
1200
1201 return 0;
1202 }
1203 #else
bcm_acpi_probe(struct bcm_device * dev)1204 static int bcm_acpi_probe(struct bcm_device *dev)
1205 {
1206 return -EINVAL;
1207 }
1208 #endif /* CONFIG_ACPI */
1209
bcm_of_probe(struct bcm_device * bdev)1210 static int bcm_of_probe(struct bcm_device *bdev)
1211 {
1212 bdev->use_autobaud_mode = device_property_read_bool(bdev->dev,
1213 "brcm,requires-autobaud-mode");
1214 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1215 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1216 bdev->pcm_int_params, 5);
1217 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1218 bdev->irq_active_low = irq_get_trigger_type(bdev->irq)
1219 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW);
1220 return 0;
1221 }
1222
bcm_probe(struct platform_device * pdev)1223 static int bcm_probe(struct platform_device *pdev)
1224 {
1225 struct bcm_device *dev;
1226 int ret;
1227
1228 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1229 if (!dev)
1230 return -ENOMEM;
1231
1232 dev->dev = &pdev->dev;
1233
1234 ret = platform_get_irq(pdev, 0);
1235 if (ret < 0)
1236 return ret;
1237
1238 dev->irq = ret;
1239
1240 /* Initialize routing field to an unused value */
1241 dev->pcm_int_params[0] = 0xff;
1242
1243 if (has_acpi_companion(&pdev->dev)) {
1244 ret = bcm_acpi_probe(dev);
1245 if (ret)
1246 return ret;
1247 }
1248
1249 ret = bcm_get_resources(dev);
1250 if (ret)
1251 return ret;
1252
1253 platform_set_drvdata(pdev, dev);
1254
1255 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1256
1257 /* Place this instance on the device list */
1258 mutex_lock(&bcm_device_lock);
1259 list_add_tail(&dev->list, &bcm_device_list);
1260 mutex_unlock(&bcm_device_lock);
1261
1262 ret = bcm_gpio_set_power(dev, false);
1263 if (ret)
1264 dev_err(&pdev->dev, "Failed to power down\n");
1265
1266 return 0;
1267 }
1268
bcm_remove(struct platform_device * pdev)1269 static int bcm_remove(struct platform_device *pdev)
1270 {
1271 struct bcm_device *dev = platform_get_drvdata(pdev);
1272
1273 mutex_lock(&bcm_device_lock);
1274 list_del(&dev->list);
1275 mutex_unlock(&bcm_device_lock);
1276
1277 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1278
1279 return 0;
1280 }
1281
1282 static const struct hci_uart_proto bcm_proto = {
1283 .id = HCI_UART_BCM,
1284 .name = "Broadcom",
1285 .manufacturer = 15,
1286 .init_speed = 115200,
1287 .open = bcm_open,
1288 .close = bcm_close,
1289 .flush = bcm_flush,
1290 .setup = bcm_setup,
1291 .set_baudrate = bcm_set_baudrate,
1292 .recv = bcm_recv,
1293 .enqueue = bcm_enqueue,
1294 .dequeue = bcm_dequeue,
1295 };
1296
1297 #ifdef CONFIG_ACPI
1298 static const struct acpi_device_id bcm_acpi_match[] = {
1299 { "BCM2E00" },
1300 { "BCM2E01" },
1301 { "BCM2E02" },
1302 { "BCM2E03" },
1303 { "BCM2E04" },
1304 { "BCM2E05" },
1305 { "BCM2E06" },
1306 { "BCM2E07" },
1307 { "BCM2E08" },
1308 { "BCM2E09" },
1309 { "BCM2E0A" },
1310 { "BCM2E0B" },
1311 { "BCM2E0C" },
1312 { "BCM2E0D" },
1313 { "BCM2E0E" },
1314 { "BCM2E0F" },
1315 { "BCM2E10" },
1316 { "BCM2E11" },
1317 { "BCM2E12" },
1318 { "BCM2E13" },
1319 { "BCM2E14" },
1320 { "BCM2E15" },
1321 { "BCM2E16" },
1322 { "BCM2E17" },
1323 { "BCM2E18" },
1324 { "BCM2E19" },
1325 { "BCM2E1A" },
1326 { "BCM2E1B" },
1327 { "BCM2E1C" },
1328 { "BCM2E1D" },
1329 { "BCM2E1F" },
1330 { "BCM2E20" },
1331 { "BCM2E21" },
1332 { "BCM2E22" },
1333 { "BCM2E23" },
1334 { "BCM2E24" },
1335 { "BCM2E25" },
1336 { "BCM2E26" },
1337 { "BCM2E27" },
1338 { "BCM2E28" },
1339 { "BCM2E29" },
1340 { "BCM2E2A" },
1341 { "BCM2E2B" },
1342 { "BCM2E2C" },
1343 { "BCM2E2D" },
1344 { "BCM2E2E" },
1345 { "BCM2E2F" },
1346 { "BCM2E30" },
1347 { "BCM2E31" },
1348 { "BCM2E32" },
1349 { "BCM2E33" },
1350 { "BCM2E34" },
1351 { "BCM2E35" },
1352 { "BCM2E36" },
1353 { "BCM2E37" },
1354 { "BCM2E38" },
1355 { "BCM2E39" },
1356 { "BCM2E3A" },
1357 { "BCM2E3B" },
1358 { "BCM2E3C" },
1359 { "BCM2E3D" },
1360 { "BCM2E3E" },
1361 { "BCM2E3F" },
1362 { "BCM2E40" },
1363 { "BCM2E41" },
1364 { "BCM2E42" },
1365 { "BCM2E43" },
1366 { "BCM2E44" },
1367 { "BCM2E45" },
1368 { "BCM2E46" },
1369 { "BCM2E47" },
1370 { "BCM2E48" },
1371 { "BCM2E49" },
1372 { "BCM2E4A" },
1373 { "BCM2E4B" },
1374 { "BCM2E4C" },
1375 { "BCM2E4D" },
1376 { "BCM2E4E" },
1377 { "BCM2E4F" },
1378 { "BCM2E50" },
1379 { "BCM2E51" },
1380 { "BCM2E52" },
1381 { "BCM2E53" },
1382 { "BCM2E54" },
1383 { "BCM2E55" },
1384 { "BCM2E56" },
1385 { "BCM2E57" },
1386 { "BCM2E58" },
1387 { "BCM2E59" },
1388 { "BCM2E5A" },
1389 { "BCM2E5B" },
1390 { "BCM2E5C" },
1391 { "BCM2E5D" },
1392 { "BCM2E5E" },
1393 { "BCM2E5F" },
1394 { "BCM2E60" },
1395 { "BCM2E61" },
1396 { "BCM2E62" },
1397 { "BCM2E63" },
1398 { "BCM2E64" },
1399 { "BCM2E65" },
1400 { "BCM2E66" },
1401 { "BCM2E67" },
1402 { "BCM2E68" },
1403 { "BCM2E69" },
1404 { "BCM2E6B" },
1405 { "BCM2E6D" },
1406 { "BCM2E6E" },
1407 { "BCM2E6F" },
1408 { "BCM2E70" },
1409 { "BCM2E71" },
1410 { "BCM2E72" },
1411 { "BCM2E73" },
1412 { "BCM2E74" },
1413 { "BCM2E75" },
1414 { "BCM2E76" },
1415 { "BCM2E77" },
1416 { "BCM2E78" },
1417 { "BCM2E79" },
1418 { "BCM2E7A" },
1419 { "BCM2E7B" },
1420 { "BCM2E7C" },
1421 { "BCM2E7D" },
1422 { "BCM2E7E" },
1423 { "BCM2E7F" },
1424 { "BCM2E80" },
1425 { "BCM2E81" },
1426 { "BCM2E82" },
1427 { "BCM2E83" },
1428 { "BCM2E84" },
1429 { "BCM2E85" },
1430 { "BCM2E86" },
1431 { "BCM2E87" },
1432 { "BCM2E88" },
1433 { "BCM2E89" },
1434 { "BCM2E8A" },
1435 { "BCM2E8B" },
1436 { "BCM2E8C" },
1437 { "BCM2E8D" },
1438 { "BCM2E8E" },
1439 { "BCM2E90" },
1440 { "BCM2E92" },
1441 { "BCM2E93" },
1442 { "BCM2E94" },
1443 { "BCM2E95" },
1444 { "BCM2E96" },
1445 { "BCM2E97" },
1446 { "BCM2E98" },
1447 { "BCM2E99" },
1448 { "BCM2E9A" },
1449 { "BCM2E9B" },
1450 { "BCM2E9C" },
1451 { "BCM2E9D" },
1452 { "BCM2EA0" },
1453 { "BCM2EA1" },
1454 { "BCM2EA2" },
1455 { "BCM2EA3" },
1456 { "BCM2EA4" },
1457 { "BCM2EA5" },
1458 { "BCM2EA6" },
1459 { "BCM2EA7" },
1460 { "BCM2EA8" },
1461 { "BCM2EA9" },
1462 { "BCM2EAA" },
1463 { "BCM2EAB" },
1464 { "BCM2EAC" },
1465 { },
1466 };
1467 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1468 #endif
1469
1470 /* suspend and resume callbacks */
1471 static const struct dev_pm_ops bcm_pm_ops = {
1472 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1473 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1474 };
1475
1476 static struct platform_driver bcm_driver = {
1477 .probe = bcm_probe,
1478 .remove = bcm_remove,
1479 .driver = {
1480 .name = "hci_bcm",
1481 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1482 .pm = &bcm_pm_ops,
1483 },
1484 };
1485
bcm_serdev_probe(struct serdev_device * serdev)1486 static int bcm_serdev_probe(struct serdev_device *serdev)
1487 {
1488 struct bcm_device *bcmdev;
1489 const struct bcm_device_data *data;
1490 int err;
1491
1492 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1493 if (!bcmdev)
1494 return -ENOMEM;
1495
1496 bcmdev->dev = &serdev->dev;
1497 #ifdef CONFIG_PM
1498 bcmdev->hu = &bcmdev->serdev_hu;
1499 #endif
1500 bcmdev->serdev_hu.serdev = serdev;
1501 serdev_device_set_drvdata(serdev, bcmdev);
1502
1503 /* Initialize routing field to an unused value */
1504 bcmdev->pcm_int_params[0] = 0xff;
1505
1506 if (has_acpi_companion(&serdev->dev))
1507 err = bcm_acpi_probe(bcmdev);
1508 else
1509 err = bcm_of_probe(bcmdev);
1510 if (err)
1511 return err;
1512
1513 err = bcm_get_resources(bcmdev);
1514 if (err)
1515 return err;
1516
1517 if (!bcmdev->shutdown) {
1518 dev_warn(&serdev->dev,
1519 "No reset resource, using default baud rate\n");
1520 bcmdev->oper_speed = bcmdev->init_speed;
1521 }
1522
1523 err = bcm_gpio_set_power(bcmdev, false);
1524 if (err)
1525 dev_err(&serdev->dev, "Failed to power down\n");
1526
1527 data = device_get_match_data(bcmdev->dev);
1528 if (data) {
1529 bcmdev->max_autobaud_speed = data->max_autobaud_speed;
1530 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1531 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1532 }
1533
1534 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1535 }
1536
bcm_serdev_remove(struct serdev_device * serdev)1537 static void bcm_serdev_remove(struct serdev_device *serdev)
1538 {
1539 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1540
1541 hci_uart_unregister_device(&bcmdev->serdev_hu);
1542 }
1543
1544 #ifdef CONFIG_OF
1545 static struct bcm_device_data bcm4354_device_data = {
1546 .no_early_set_baudrate = true,
1547 };
1548
1549 static struct bcm_device_data bcm43438_device_data = {
1550 .drive_rts_on_open = true,
1551 };
1552
1553 static struct bcm_device_data cyw55572_device_data = {
1554 .max_autobaud_speed = 921600,
1555 };
1556
1557 static const struct of_device_id bcm_bluetooth_of_match[] = {
1558 { .compatible = "brcm,bcm20702a1" },
1559 { .compatible = "brcm,bcm4329-bt" },
1560 { .compatible = "brcm,bcm4330-bt" },
1561 { .compatible = "brcm,bcm4334-bt" },
1562 { .compatible = "brcm,bcm4345c5" },
1563 { .compatible = "brcm,bcm43430a0-bt" },
1564 { .compatible = "brcm,bcm43430a1-bt" },
1565 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1566 { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data },
1567 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1568 { .compatible = "brcm,bcm4335a0" },
1569 { .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data },
1570 { },
1571 };
1572 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1573 #endif
1574
1575 static struct serdev_device_driver bcm_serdev_driver = {
1576 .probe = bcm_serdev_probe,
1577 .remove = bcm_serdev_remove,
1578 .driver = {
1579 .name = "hci_uart_bcm",
1580 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1581 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1582 .pm = &bcm_pm_ops,
1583 },
1584 };
1585
bcm_init(void)1586 int __init bcm_init(void)
1587 {
1588 /* For now, we need to keep both platform device
1589 * driver (ACPI generated) and serdev driver (DT).
1590 */
1591 platform_driver_register(&bcm_driver);
1592 serdev_device_driver_register(&bcm_serdev_driver);
1593
1594 return hci_uart_register_proto(&bcm_proto);
1595 }
1596
bcm_deinit(void)1597 int __exit bcm_deinit(void)
1598 {
1599 platform_driver_unregister(&bcm_driver);
1600 serdev_device_driver_unregister(&bcm_serdev_driver);
1601
1602 return hci_uart_unregister_proto(&bcm_proto);
1603 }
1604
