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