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