forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathhci_bcm.c
1582 lines (1313 loc) · 36.6 KB
/
hci_bcm.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Bluetooth HCI UART driver for Broadcom devices
*
* Copyright (C) 2015 Intel Corporation
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/property.h>
#include <linux/platform_data/x86/apple.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/tty.h>
#include <linux/interrupt.h>
#include <linux/dmi.h>
#include <linux/pm_runtime.h>
#include <linux/serdev.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "btbcm.h"
#include "hci_uart.h"
#define BCM_NULL_PKT 0x00
#define BCM_NULL_SIZE 0
#define BCM_LM_DIAG_PKT 0x07
#define BCM_LM_DIAG_SIZE 63
#define BCM_TYPE49_PKT 0x31
#define BCM_TYPE49_SIZE 0
#define BCM_TYPE52_PKT 0x34
#define BCM_TYPE52_SIZE 0
#define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
#define BCM_NUM_SUPPLIES 2
/**
* struct bcm_device_data - device specific data
* @no_early_set_baudrate: Disallow set baudrate before driver setup()
* @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
*/
struct bcm_device_data {
bool no_early_set_baudrate;
bool drive_rts_on_open;
};
/**
* struct bcm_device - device driver resources
* @serdev_hu: HCI UART controller struct
* @list: bcm_device_list node
* @dev: physical UART slave
* @name: device name logged by bt_dev_*() functions
* @device_wakeup: BT_WAKE pin,
* assert = Bluetooth device must wake up or remain awake,
* deassert = Bluetooth device may sleep when sleep criteria are met
* @shutdown: BT_REG_ON pin,
* power up or power down Bluetooth device internal regulators
* @reset: BT_RST_N pin,
* active low resets the Bluetooth logic core
* @set_device_wakeup: callback to toggle BT_WAKE pin
* either by accessing @device_wakeup or by calling @btlp
* @set_shutdown: callback to toggle BT_REG_ON pin
* either by accessing @shutdown or by calling @btpu/@btpd
* @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
* @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
* @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
* @gpio_count: internal counter for GPIO resources associated with ACPI device
* @gpio_int_idx: index in _CRS for GpioInt() resource
* @txco_clk: external reference frequency clock used by Bluetooth device
* @lpo_clk: external LPO clock used by Bluetooth device
* @supplies: VBAT and VDDIO supplies used by Bluetooth device
* @res_enabled: whether clocks and supplies are prepared and enabled
* @init_speed: default baudrate of Bluetooth device;
* the host UART is initially set to this baudrate so that
* it can configure the Bluetooth device for @oper_speed
* @oper_speed: preferred baudrate of Bluetooth device;
* set to 0 if @init_speed is already the preferred baudrate
* @irq: interrupt triggered by HOST_WAKE_BT pin
* @irq_active_low: whether @irq is active low
* @irq_acquired: flag to show if IRQ handler has been assigned
* @hu: pointer to HCI UART controller struct,
* used to disable flow control during runtime suspend and system sleep
* @is_suspended: whether flow control is currently disabled
* @no_early_set_baudrate: don't set_baudrate before setup()
* @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
* @pcm_int_params: keep the initial PCM configuration
*/
struct bcm_device {
/* Must be the first member, hci_serdev.c expects this. */
struct hci_uart serdev_hu;
struct list_head list;
struct device *dev;
const char *name;
struct gpio_desc *device_wakeup;
struct gpio_desc *shutdown;
struct gpio_desc *reset;
int (*set_device_wakeup)(struct bcm_device *, bool);
int (*set_shutdown)(struct bcm_device *, bool);
#ifdef CONFIG_ACPI
acpi_handle btlp, btpu, btpd;
int gpio_count;
int gpio_int_idx;
#endif
struct clk *txco_clk;
struct clk *lpo_clk;
struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
bool res_enabled;
u32 init_speed;
u32 oper_speed;
int irq;
bool irq_active_low;
bool irq_acquired;
#ifdef CONFIG_PM
struct hci_uart *hu;
bool is_suspended;
#endif
bool no_early_set_baudrate;
bool drive_rts_on_open;
u8 pcm_int_params[5];
};
/* generic bcm uart resources */
struct bcm_data {
struct sk_buff *rx_skb;
struct sk_buff_head txq;
struct bcm_device *dev;
};
/* List of BCM BT UART devices */
static DEFINE_MUTEX(bcm_device_lock);
static LIST_HEAD(bcm_device_list);
static int irq_polarity = -1;
module_param(irq_polarity, int, 0444);
MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
{
if (hu->serdev)
serdev_device_set_baudrate(hu->serdev, speed);
else
hci_uart_set_baudrate(hu, speed);
}
static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
{
struct hci_dev *hdev = hu->hdev;
struct sk_buff *skb;
struct bcm_update_uart_baud_rate param;
if (speed > 3000000) {
struct bcm_write_uart_clock_setting clock;
clock.type = BCM_UART_CLOCK_48MHZ;
bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
/* This Broadcom specific command changes the UART's controller
* clock for baud rate > 3000000.
*/
skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
bt_dev_err(hdev, "BCM: failed to write clock (%d)",
err);
return err;
}
kfree_skb(skb);
}
bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
param.zero = cpu_to_le16(0);
param.baud_rate = cpu_to_le32(speed);
/* This Broadcom specific command changes the UART's controller baud
* rate.
*/
skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
err);
return err;
}
kfree_skb(skb);
return 0;
}
/* bcm_device_exists should be protected by bcm_device_lock */
static bool bcm_device_exists(struct bcm_device *device)
{
struct list_head *p;
#ifdef CONFIG_PM
/* Devices using serdev always exist */
if (device && device->hu && device->hu->serdev)
return true;
#endif
list_for_each(p, &bcm_device_list) {
struct bcm_device *dev = list_entry(p, struct bcm_device, list);
if (device == dev)
return true;
}
return false;
}
static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
{
int err;
if (powered && !dev->res_enabled) {
/* Intel Macs use bcm_apple_get_resources() and don't
* have regulator supplies configured.
*/
if (dev->supplies[0].supply) {
err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
dev->supplies);
if (err)
return err;
}
/* LPO clock needs to be 32.768 kHz */
err = clk_set_rate(dev->lpo_clk, 32768);
if (err) {
dev_err(dev->dev, "Could not set LPO clock rate\n");
goto err_regulator_disable;
}
err = clk_prepare_enable(dev->lpo_clk);
if (err)
goto err_regulator_disable;
err = clk_prepare_enable(dev->txco_clk);
if (err)
goto err_lpo_clk_disable;
}
err = dev->set_shutdown(dev, powered);
if (err)
goto err_txco_clk_disable;
err = dev->set_device_wakeup(dev, powered);
if (err)
goto err_revert_shutdown;
if (!powered && dev->res_enabled) {
clk_disable_unprepare(dev->txco_clk);
clk_disable_unprepare(dev->lpo_clk);
/* Intel Macs use bcm_apple_get_resources() and don't
* have regulator supplies configured.
*/
if (dev->supplies[0].supply)
regulator_bulk_disable(BCM_NUM_SUPPLIES,
dev->supplies);
}
/* wait for device to power on and come out of reset */
usleep_range(100000, 120000);
dev->res_enabled = powered;
return 0;
err_revert_shutdown:
dev->set_shutdown(dev, !powered);
err_txco_clk_disable:
if (powered && !dev->res_enabled)
clk_disable_unprepare(dev->txco_clk);
err_lpo_clk_disable:
if (powered && !dev->res_enabled)
clk_disable_unprepare(dev->lpo_clk);
err_regulator_disable:
if (powered && !dev->res_enabled)
regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
return err;
}
#ifdef CONFIG_PM
static irqreturn_t bcm_host_wake(int irq, void *data)
{
struct bcm_device *bdev = data;
bt_dev_dbg(bdev, "Host wake IRQ");
pm_runtime_get(bdev->dev);
pm_runtime_mark_last_busy(bdev->dev);
pm_runtime_put_autosuspend(bdev->dev);
return IRQ_HANDLED;
}
static int bcm_request_irq(struct bcm_data *bcm)
{
struct bcm_device *bdev = bcm->dev;
int err;
mutex_lock(&bcm_device_lock);
if (!bcm_device_exists(bdev)) {
err = -ENODEV;
goto unlock;
}
if (bdev->irq <= 0) {
err = -EOPNOTSUPP;
goto unlock;
}
err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
IRQF_TRIGGER_RISING,
"host_wake", bdev);
if (err) {
bdev->irq = err;
goto unlock;
}
bdev->irq_acquired = true;
device_init_wakeup(bdev->dev, true);
pm_runtime_set_autosuspend_delay(bdev->dev,
BCM_AUTOSUSPEND_DELAY);
pm_runtime_use_autosuspend(bdev->dev);
pm_runtime_set_active(bdev->dev);
pm_runtime_enable(bdev->dev);
unlock:
mutex_unlock(&bcm_device_lock);
return err;
}
static const struct bcm_set_sleep_mode default_sleep_params = {
.sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
.idle_host = 2, /* idle threshold HOST, in 300ms */
.idle_dev = 2, /* idle threshold device, in 300ms */
.bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
.host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
.allow_host_sleep = 1, /* Allow host sleep in SCO flag */
.combine_modes = 1, /* Combine sleep and LPM flag */
.tristate_control = 0, /* Allow tri-state control of UART tx flag */
/* Irrelevant USB flags */
.usb_auto_sleep = 0,
.usb_resume_timeout = 0,
.break_to_host = 0,
.pulsed_host_wake = 1,
};
static int bcm_setup_sleep(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
struct sk_buff *skb;
struct bcm_set_sleep_mode sleep_params = default_sleep_params;
sleep_params.host_wake_active = !bcm->dev->irq_active_low;
skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
&sleep_params, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
return err;
}
kfree_skb(skb);
bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
return 0;
}
#else
static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
#endif
static int bcm_set_diag(struct hci_dev *hdev, bool enable)
{
struct hci_uart *hu = hci_get_drvdata(hdev);
struct bcm_data *bcm = hu->priv;
struct sk_buff *skb;
if (!test_bit(HCI_RUNNING, &hdev->flags))
return -ENETDOWN;
skb = bt_skb_alloc(3, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_put_u8(skb, BCM_LM_DIAG_PKT);
skb_put_u8(skb, 0xf0);
skb_put_u8(skb, enable);
skb_queue_tail(&bcm->txq, skb);
hci_uart_tx_wakeup(hu);
return 0;
}
static int bcm_open(struct hci_uart *hu)
{
struct bcm_data *bcm;
struct list_head *p;
int err;
bt_dev_dbg(hu->hdev, "hu %p", hu);
if (!hci_uart_has_flow_control(hu))
return -EOPNOTSUPP;
bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
if (!bcm)
return -ENOMEM;
skb_queue_head_init(&bcm->txq);
hu->priv = bcm;
mutex_lock(&bcm_device_lock);
if (hu->serdev) {
bcm->dev = serdev_device_get_drvdata(hu->serdev);
goto out;
}
if (!hu->tty->dev)
goto out;
list_for_each(p, &bcm_device_list) {
struct bcm_device *dev = list_entry(p, struct bcm_device, list);
/* Retrieve saved bcm_device based on parent of the
* platform device (saved during device probe) and
* parent of tty device used by hci_uart
*/
if (hu->tty->dev->parent == dev->dev->parent) {
bcm->dev = dev;
#ifdef CONFIG_PM
dev->hu = hu;
#endif
break;
}
}
out:
if (bcm->dev) {
if (bcm->dev->drive_rts_on_open)
hci_uart_set_flow_control(hu, true);
hu->init_speed = bcm->dev->init_speed;
/* If oper_speed is set, ldisc/serdev will set the baudrate
* before calling setup()
*/
if (!bcm->dev->no_early_set_baudrate)
hu->oper_speed = bcm->dev->oper_speed;
err = bcm_gpio_set_power(bcm->dev, true);
if (bcm->dev->drive_rts_on_open)
hci_uart_set_flow_control(hu, false);
if (err)
goto err_unset_hu;
}
mutex_unlock(&bcm_device_lock);
return 0;
err_unset_hu:
#ifdef CONFIG_PM
if (!hu->serdev)
bcm->dev->hu = NULL;
#endif
mutex_unlock(&bcm_device_lock);
hu->priv = NULL;
kfree(bcm);
return err;
}
static int bcm_close(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
struct bcm_device *bdev = NULL;
int err;
bt_dev_dbg(hu->hdev, "hu %p", hu);
/* Protect bcm->dev against removal of the device or driver */
mutex_lock(&bcm_device_lock);
if (hu->serdev) {
bdev = serdev_device_get_drvdata(hu->serdev);
} else if (bcm_device_exists(bcm->dev)) {
bdev = bcm->dev;
#ifdef CONFIG_PM
bdev->hu = NULL;
#endif
}
if (bdev) {
if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) {
devm_free_irq(bdev->dev, bdev->irq, bdev);
device_init_wakeup(bdev->dev, false);
pm_runtime_disable(bdev->dev);
}
err = bcm_gpio_set_power(bdev, false);
if (err)
bt_dev_err(hu->hdev, "Failed to power down");
else
pm_runtime_set_suspended(bdev->dev);
}
mutex_unlock(&bcm_device_lock);
skb_queue_purge(&bcm->txq);
kfree_skb(bcm->rx_skb);
kfree(bcm);
hu->priv = NULL;
return 0;
}
static int bcm_flush(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
bt_dev_dbg(hu->hdev, "hu %p", hu);
skb_queue_purge(&bcm->txq);
return 0;
}
static int bcm_setup(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
bool fw_load_done = false;
unsigned int speed;
int err;
bt_dev_dbg(hu->hdev, "hu %p", hu);
hu->hdev->set_diag = bcm_set_diag;
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
err = btbcm_initialize(hu->hdev, &fw_load_done);
if (err)
return err;
if (!fw_load_done)
return 0;
/* Init speed if any */
if (hu->init_speed)
speed = hu->init_speed;
else if (hu->proto->init_speed)
speed = hu->proto->init_speed;
else
speed = 0;
if (speed)
host_set_baudrate(hu, speed);
/* Operational speed if any */
if (hu->oper_speed)
speed = hu->oper_speed;
else if (bcm->dev && bcm->dev->oper_speed)
speed = bcm->dev->oper_speed;
else if (hu->proto->oper_speed)
speed = hu->proto->oper_speed;
else
speed = 0;
if (speed) {
err = bcm_set_baudrate(hu, speed);
if (!err)
host_set_baudrate(hu, speed);
}
/* PCM parameters if provided */
if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
struct bcm_set_pcm_int_params params;
btbcm_read_pcm_int_params(hu->hdev, ¶ms);
memcpy(¶ms, bcm->dev->pcm_int_params, 5);
btbcm_write_pcm_int_params(hu->hdev, ¶ms);
}
err = btbcm_finalize(hu->hdev, &fw_load_done);
if (err)
return err;
/* Some devices ship with the controller default address.
* Allow the bootloader to set a valid address through the
* device tree.
*/
set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
if (!bcm_request_irq(bcm))
err = bcm_setup_sleep(hu);
return err;
}
#define BCM_RECV_LM_DIAG \
.type = BCM_LM_DIAG_PKT, \
.hlen = BCM_LM_DIAG_SIZE, \
.loff = 0, \
.lsize = 0, \
.maxlen = BCM_LM_DIAG_SIZE
#define BCM_RECV_NULL \
.type = BCM_NULL_PKT, \
.hlen = BCM_NULL_SIZE, \
.loff = 0, \
.lsize = 0, \
.maxlen = BCM_NULL_SIZE
#define BCM_RECV_TYPE49 \
.type = BCM_TYPE49_PKT, \
.hlen = BCM_TYPE49_SIZE, \
.loff = 0, \
.lsize = 0, \
.maxlen = BCM_TYPE49_SIZE
#define BCM_RECV_TYPE52 \
.type = BCM_TYPE52_PKT, \
.hlen = BCM_TYPE52_SIZE, \
.loff = 0, \
.lsize = 0, \
.maxlen = BCM_TYPE52_SIZE
static const struct h4_recv_pkt bcm_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = hci_recv_frame },
{ H4_RECV_ISO, .recv = hci_recv_frame },
{ BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
{ BCM_RECV_NULL, .recv = hci_recv_diag },
{ BCM_RECV_TYPE49, .recv = hci_recv_diag },
{ BCM_RECV_TYPE52, .recv = hci_recv_diag },
};
static int bcm_recv(struct hci_uart *hu, const void *data, int count)
{
struct bcm_data *bcm = hu->priv;
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
return -EUNATCH;
bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
if (IS_ERR(bcm->rx_skb)) {
int err = PTR_ERR(bcm->rx_skb);
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
bcm->rx_skb = NULL;
return err;
} else if (!bcm->rx_skb) {
/* Delay auto-suspend when receiving completed packet */
mutex_lock(&bcm_device_lock);
if (bcm->dev && bcm_device_exists(bcm->dev)) {
pm_runtime_get(bcm->dev->dev);
pm_runtime_mark_last_busy(bcm->dev->dev);
pm_runtime_put_autosuspend(bcm->dev->dev);
}
mutex_unlock(&bcm_device_lock);
}
return count;
}
static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
struct bcm_data *bcm = hu->priv;
bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
/* Prepend skb with frame type */
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
skb_queue_tail(&bcm->txq, skb);
return 0;
}
static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
struct sk_buff *skb = NULL;
struct bcm_device *bdev = NULL;
mutex_lock(&bcm_device_lock);
if (bcm_device_exists(bcm->dev)) {
bdev = bcm->dev;
pm_runtime_get_sync(bdev->dev);
/* Shall be resumed here */
}
skb = skb_dequeue(&bcm->txq);
if (bdev) {
pm_runtime_mark_last_busy(bdev->dev);
pm_runtime_put_autosuspend(bdev->dev);
}
mutex_unlock(&bcm_device_lock);
return skb;
}
#ifdef CONFIG_PM
static int bcm_suspend_device(struct device *dev)
{
struct bcm_device *bdev = dev_get_drvdata(dev);
int err;
bt_dev_dbg(bdev, "");
if (!bdev->is_suspended && bdev->hu) {
hci_uart_set_flow_control(bdev->hu, true);
/* Once this returns, driver suspends BT via GPIO */
bdev->is_suspended = true;
}
/* Suspend the device */
err = bdev->set_device_wakeup(bdev, false);
if (err) {
if (bdev->is_suspended && bdev->hu) {
bdev->is_suspended = false;
hci_uart_set_flow_control(bdev->hu, false);
}
return -EBUSY;
}
bt_dev_dbg(bdev, "suspend, delaying 15 ms");
msleep(15);
return 0;
}
static int bcm_resume_device(struct device *dev)
{
struct bcm_device *bdev = dev_get_drvdata(dev);
int err;
bt_dev_dbg(bdev, "");
err = bdev->set_device_wakeup(bdev, true);
if (err) {
dev_err(dev, "Failed to power up\n");
return err;
}
bt_dev_dbg(bdev, "resume, delaying 15 ms");
msleep(15);
/* When this executes, the device has woken up already */
if (bdev->is_suspended && bdev->hu) {
bdev->is_suspended = false;
hci_uart_set_flow_control(bdev->hu, false);
}
return 0;
}
#endif
#ifdef CONFIG_PM_SLEEP
/* suspend callback */
static int bcm_suspend(struct device *dev)
{
struct bcm_device *bdev = dev_get_drvdata(dev);
int error;
bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
/*
* When used with a device instantiated as platform_device, bcm_suspend
* can be called at any time as long as the platform device is bound,
* so it should use bcm_device_lock to protect access to hci_uart
* and device_wake-up GPIO.
*/
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
goto unlock;
if (pm_runtime_active(dev))
bcm_suspend_device(dev);
if (device_may_wakeup(dev) && bdev->irq > 0) {
error = enable_irq_wake(bdev->irq);
if (!error)
bt_dev_dbg(bdev, "BCM irq: enabled");
}
unlock:
mutex_unlock(&bcm_device_lock);
return 0;
}
/* resume callback */
static int bcm_resume(struct device *dev)
{
struct bcm_device *bdev = dev_get_drvdata(dev);
int err = 0;
bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
/*
* When used with a device instantiated as platform_device, bcm_resume
* can be called at any time as long as platform device is bound,
* so it should use bcm_device_lock to protect access to hci_uart
* and device_wake-up GPIO.
*/
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
goto unlock;
if (device_may_wakeup(dev) && bdev->irq > 0) {
disable_irq_wake(bdev->irq);
bt_dev_dbg(bdev, "BCM irq: disabled");
}
err = bcm_resume_device(dev);
unlock:
mutex_unlock(&bcm_device_lock);
if (!err) {
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
}
return 0;
}
#endif
/* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
static struct gpiod_lookup_table asus_tf103c_irq_gpios = {
.dev_id = "serial0-0",
.table = {
GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH),
{ }
},
};
static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
{
.ident = "Asus TF103C",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
},
.driver_data = &asus_tf103c_irq_gpios,
},
{
.ident = "Meegopad T08",
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
"To be filled by OEM."),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
},
},
{ }
};
#ifdef CONFIG_ACPI
static const struct acpi_gpio_params first_gpio = { 0, 0, false };
static const struct acpi_gpio_params second_gpio = { 1, 0, false };
static const struct acpi_gpio_params third_gpio = { 2, 0, false };
static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
{ "device-wakeup-gpios", &first_gpio, 1 },
{ "shutdown-gpios", &second_gpio, 1 },
{ "host-wakeup-gpios", &third_gpio, 1 },
{ },
};
static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
{ "host-wakeup-gpios", &first_gpio, 1 },
{ "device-wakeup-gpios", &second_gpio, 1 },
{ "shutdown-gpios", &third_gpio, 1 },
{ },
};
static int bcm_resource(struct acpi_resource *ares, void *data)
{
struct bcm_device *dev = data;
struct acpi_resource_extended_irq *irq;
struct acpi_resource_gpio *gpio;
struct acpi_resource_uart_serialbus *sb;
switch (ares->type) {
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
irq = &ares->data.extended_irq;
if (irq->polarity != ACPI_ACTIVE_LOW)
dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
dev->irq_active_low = true;
break;
case ACPI_RESOURCE_TYPE_GPIO:
gpio = &ares->data.gpio;
if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
dev->gpio_int_idx = dev->gpio_count;
dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
}
dev->gpio_count++;
break;
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
sb = &ares->data.uart_serial_bus;
if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
dev->init_speed = sb->default_baud_rate;
dev->oper_speed = 4000000;
}
break;
default:
break;
}
return 0;
}
static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
{
if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
return -EIO;
return 0;
}
static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
{
if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
NULL, NULL, NULL)))
return -EIO;
return 0;
}
static int bcm_apple_get_resources(struct bcm_device *dev)
{
struct acpi_device *adev = ACPI_COMPANION(dev->dev);
const union acpi_object *obj;
if (!adev ||
ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
return -ENODEV;
if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
obj->buffer.length == 8)
dev->init_speed = *(u64 *)obj->buffer.pointer;
dev->set_device_wakeup = bcm_apple_set_device_wakeup;
dev->set_shutdown = bcm_apple_set_shutdown;
return 0;
}
#else
static inline int bcm_apple_get_resources(struct bcm_device *dev)
{