-
Notifications
You must be signed in to change notification settings - Fork 114
/
Copy pathhci_intel.c
1240 lines (993 loc) · 29.6 KB
/
hci_intel.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 Intel 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/wait.h>
#include <linux/tty.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "hci_uart.h"
#include "btintel.h"
#define STATE_BOOTLOADER 0
#define STATE_DOWNLOADING 1
#define STATE_FIRMWARE_LOADED 2
#define STATE_FIRMWARE_FAILED 3
#define STATE_BOOTING 4
#define STATE_LPM_ENABLED 5
#define STATE_TX_ACTIVE 6
#define STATE_SUSPENDED 7
#define STATE_LPM_TRANSACTION 8
#define HCI_LPM_WAKE_PKT 0xf0
#define HCI_LPM_PKT 0xf1
#define HCI_LPM_MAX_SIZE 10
#define HCI_LPM_HDR_SIZE HCI_EVENT_HDR_SIZE
#define LPM_OP_TX_NOTIFY 0x00
#define LPM_OP_SUSPEND_ACK 0x02
#define LPM_OP_RESUME_ACK 0x03
#define LPM_SUSPEND_DELAY_MS 1000
struct hci_lpm_pkt {
__u8 opcode;
__u8 dlen;
__u8 data[0];
} __packed;
struct intel_device {
struct list_head list;
struct platform_device *pdev;
struct gpio_desc *reset;
struct hci_uart *hu;
struct mutex hu_lock;
int irq;
};
static LIST_HEAD(intel_device_list);
static DEFINE_MUTEX(intel_device_list_lock);
struct intel_data {
struct sk_buff *rx_skb;
struct sk_buff_head txq;
struct work_struct busy_work;
struct hci_uart *hu;
unsigned long flags;
};
static u8 intel_convert_speed(unsigned int speed)
{
switch (speed) {
case 9600:
return 0x00;
case 19200:
return 0x01;
case 38400:
return 0x02;
case 57600:
return 0x03;
case 115200:
return 0x04;
case 230400:
return 0x05;
case 460800:
return 0x06;
case 921600:
return 0x07;
case 1843200:
return 0x08;
case 3250000:
return 0x09;
case 2000000:
return 0x0a;
case 3000000:
return 0x0b;
default:
return 0xff;
}
}
static int intel_wait_booting(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
int err;
err = wait_on_bit_timeout(&intel->flags, STATE_BOOTING,
TASK_INTERRUPTIBLE,
msecs_to_jiffies(1000));
if (err == -EINTR) {
bt_dev_err(hu->hdev, "Device boot interrupted");
return -EINTR;
}
if (err) {
bt_dev_err(hu->hdev, "Device boot timeout");
return -ETIMEDOUT;
}
return err;
}
#ifdef CONFIG_PM
static int intel_wait_lpm_transaction(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
int err;
err = wait_on_bit_timeout(&intel->flags, STATE_LPM_TRANSACTION,
TASK_INTERRUPTIBLE,
msecs_to_jiffies(1000));
if (err == -EINTR) {
bt_dev_err(hu->hdev, "LPM transaction interrupted");
return -EINTR;
}
if (err) {
bt_dev_err(hu->hdev, "LPM transaction timeout");
return -ETIMEDOUT;
}
return err;
}
static int intel_lpm_suspend(struct hci_uart *hu)
{
static const u8 suspend[] = { 0x01, 0x01, 0x01 };
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
if (!test_bit(STATE_LPM_ENABLED, &intel->flags) ||
test_bit(STATE_SUSPENDED, &intel->flags))
return 0;
if (test_bit(STATE_TX_ACTIVE, &intel->flags))
return -EAGAIN;
bt_dev_dbg(hu->hdev, "Suspending");
skb = bt_skb_alloc(sizeof(suspend), GFP_KERNEL);
if (!skb) {
bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
return -ENOMEM;
}
skb_put_data(skb, suspend, sizeof(suspend));
hci_skb_pkt_type(skb) = HCI_LPM_PKT;
set_bit(STATE_LPM_TRANSACTION, &intel->flags);
/* LPM flow is a priority, enqueue packet at list head */
skb_queue_head(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
intel_wait_lpm_transaction(hu);
/* Even in case of failure, continue and test the suspended flag */
clear_bit(STATE_LPM_TRANSACTION, &intel->flags);
if (!test_bit(STATE_SUSPENDED, &intel->flags)) {
bt_dev_err(hu->hdev, "Device suspend error");
return -EINVAL;
}
bt_dev_dbg(hu->hdev, "Suspended");
hci_uart_set_flow_control(hu, true);
return 0;
}
static int intel_lpm_resume(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
if (!test_bit(STATE_LPM_ENABLED, &intel->flags) ||
!test_bit(STATE_SUSPENDED, &intel->flags))
return 0;
bt_dev_dbg(hu->hdev, "Resuming");
hci_uart_set_flow_control(hu, false);
skb = bt_skb_alloc(0, GFP_KERNEL);
if (!skb) {
bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
return -ENOMEM;
}
hci_skb_pkt_type(skb) = HCI_LPM_WAKE_PKT;
set_bit(STATE_LPM_TRANSACTION, &intel->flags);
/* LPM flow is a priority, enqueue packet at list head */
skb_queue_head(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
intel_wait_lpm_transaction(hu);
/* Even in case of failure, continue and test the suspended flag */
clear_bit(STATE_LPM_TRANSACTION, &intel->flags);
if (test_bit(STATE_SUSPENDED, &intel->flags)) {
bt_dev_err(hu->hdev, "Device resume error");
return -EINVAL;
}
bt_dev_dbg(hu->hdev, "Resumed");
return 0;
}
#endif /* CONFIG_PM */
static int intel_lpm_host_wake(struct hci_uart *hu)
{
static const u8 lpm_resume_ack[] = { LPM_OP_RESUME_ACK, 0x00 };
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
hci_uart_set_flow_control(hu, false);
clear_bit(STATE_SUSPENDED, &intel->flags);
skb = bt_skb_alloc(sizeof(lpm_resume_ack), GFP_KERNEL);
if (!skb) {
bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
return -ENOMEM;
}
skb_put_data(skb, lpm_resume_ack, sizeof(lpm_resume_ack));
hci_skb_pkt_type(skb) = HCI_LPM_PKT;
/* LPM flow is a priority, enqueue packet at list head */
skb_queue_head(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
bt_dev_dbg(hu->hdev, "Resumed by controller");
return 0;
}
static irqreturn_t intel_irq(int irq, void *dev_id)
{
struct intel_device *idev = dev_id;
dev_info(&idev->pdev->dev, "hci_intel irq\n");
mutex_lock(&idev->hu_lock);
if (idev->hu)
intel_lpm_host_wake(idev->hu);
mutex_unlock(&idev->hu_lock);
/* Host/Controller are now LPM resumed, trigger a new delayed suspend */
pm_runtime_get(&idev->pdev->dev);
pm_runtime_mark_last_busy(&idev->pdev->dev);
pm_runtime_put_autosuspend(&idev->pdev->dev);
return IRQ_HANDLED;
}
static int intel_set_power(struct hci_uart *hu, bool powered)
{
struct list_head *p;
int err = -ENODEV;
if (!hu->tty->dev)
return err;
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *idev = list_entry(p, struct intel_device,
list);
/* tty device and pdev device should share the same parent
* which is the UART port.
*/
if (hu->tty->dev->parent != idev->pdev->dev.parent)
continue;
if (!idev->reset) {
err = -ENOTSUPP;
break;
}
BT_INFO("hu %p, Switching compatible pm device (%s) to %u",
hu, dev_name(&idev->pdev->dev), powered);
gpiod_set_value(idev->reset, powered);
/* Provide to idev a hu reference which is used to run LPM
* transactions (lpm suspend/resume) from PM callbacks.
* hu needs to be protected against concurrent removing during
* these PM ops.
*/
mutex_lock(&idev->hu_lock);
idev->hu = powered ? hu : NULL;
mutex_unlock(&idev->hu_lock);
if (idev->irq < 0)
break;
if (powered && device_can_wakeup(&idev->pdev->dev)) {
err = devm_request_threaded_irq(&idev->pdev->dev,
idev->irq, NULL,
intel_irq,
IRQF_ONESHOT,
"bt-host-wake", idev);
if (err) {
BT_ERR("hu %p, unable to allocate irq-%d",
hu, idev->irq);
break;
}
device_wakeup_enable(&idev->pdev->dev);
pm_runtime_set_active(&idev->pdev->dev);
pm_runtime_use_autosuspend(&idev->pdev->dev);
pm_runtime_set_autosuspend_delay(&idev->pdev->dev,
LPM_SUSPEND_DELAY_MS);
pm_runtime_enable(&idev->pdev->dev);
} else if (!powered && device_may_wakeup(&idev->pdev->dev)) {
devm_free_irq(&idev->pdev->dev, idev->irq, idev);
device_wakeup_disable(&idev->pdev->dev);
pm_runtime_disable(&idev->pdev->dev);
}
}
mutex_unlock(&intel_device_list_lock);
return err;
}
static void intel_busy_work(struct work_struct *work)
{
struct list_head *p;
struct intel_data *intel = container_of(work, struct intel_data,
busy_work);
if (!intel->hu->tty->dev)
return;
/* Link is busy, delay the suspend */
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *idev = list_entry(p, struct intel_device,
list);
if (intel->hu->tty->dev->parent == idev->pdev->dev.parent) {
pm_runtime_get(&idev->pdev->dev);
pm_runtime_mark_last_busy(&idev->pdev->dev);
pm_runtime_put_autosuspend(&idev->pdev->dev);
break;
}
}
mutex_unlock(&intel_device_list_lock);
}
static int intel_open(struct hci_uart *hu)
{
struct intel_data *intel;
BT_DBG("hu %p", hu);
intel = kzalloc(sizeof(*intel), GFP_KERNEL);
if (!intel)
return -ENOMEM;
skb_queue_head_init(&intel->txq);
INIT_WORK(&intel->busy_work, intel_busy_work);
intel->hu = hu;
hu->priv = intel;
if (!intel_set_power(hu, true))
set_bit(STATE_BOOTING, &intel->flags);
return 0;
}
static int intel_close(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
BT_DBG("hu %p", hu);
cancel_work_sync(&intel->busy_work);
intel_set_power(hu, false);
skb_queue_purge(&intel->txq);
kfree_skb(intel->rx_skb);
kfree(intel);
hu->priv = NULL;
return 0;
}
static int intel_flush(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
BT_DBG("hu %p", hu);
skb_queue_purge(&intel->txq);
return 0;
}
static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
{
struct sk_buff *skb;
struct hci_event_hdr *hdr;
struct hci_ev_cmd_complete *evt;
skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
if (!skb)
return -ENOMEM;
hdr = skb_put(skb, sizeof(*hdr));
hdr->evt = HCI_EV_CMD_COMPLETE;
hdr->plen = sizeof(*evt) + 1;
evt = skb_put(skb, sizeof(*evt));
evt->ncmd = 0x01;
evt->opcode = cpu_to_le16(opcode);
skb_put_u8(skb, 0x00);
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
return hci_recv_frame(hdev, skb);
}
static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed)
{
struct intel_data *intel = hu->priv;
struct hci_dev *hdev = hu->hdev;
u8 speed_cmd[] = { 0x06, 0xfc, 0x01, 0x00 };
struct sk_buff *skb;
int err;
/* This can be the first command sent to the chip, check
* that the controller is ready.
*/
err = intel_wait_booting(hu);
clear_bit(STATE_BOOTING, &intel->flags);
/* In case of timeout, try to continue anyway */
if (err && err != -ETIMEDOUT)
return err;
bt_dev_info(hdev, "Change controller speed to %d", speed);
speed_cmd[3] = intel_convert_speed(speed);
if (speed_cmd[3] == 0xff) {
bt_dev_err(hdev, "Unsupported speed");
return -EINVAL;
}
/* Device will not accept speed change if Intel version has not been
* previously requested.
*/
skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
PTR_ERR(skb));
return PTR_ERR(skb);
}
kfree_skb(skb);
skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL);
if (!skb) {
bt_dev_err(hdev, "Failed to alloc memory for baudrate packet");
return -ENOMEM;
}
skb_put_data(skb, speed_cmd, sizeof(speed_cmd));
hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
hci_uart_set_flow_control(hu, true);
skb_queue_tail(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
/* wait 100ms to change baudrate on controller side */
msleep(100);
hci_uart_set_baudrate(hu, speed);
hci_uart_set_flow_control(hu, false);
return 0;
}
static int intel_setup(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
struct hci_dev *hdev = hu->hdev;
struct sk_buff *skb;
struct intel_version ver;
struct intel_boot_params params;
struct list_head *p;
const struct firmware *fw;
char fwname[64];
u32 boot_param;
ktime_t calltime, delta, rettime;
unsigned long long duration;
unsigned int init_speed, oper_speed;
int speed_change = 0;
int err;
bt_dev_dbg(hdev, "start intel_setup");
hu->hdev->set_diag = btintel_set_diag;
hu->hdev->set_bdaddr = btintel_set_bdaddr;
/* Set the default boot parameter to 0x0 and it is updated to
* SKU specific boot parameter after reading Intel_Write_Boot_Params
* command while downloading the firmware.
*/
boot_param = 0x00000000;
calltime = ktime_get();
if (hu->init_speed)
init_speed = hu->init_speed;
else
init_speed = hu->proto->init_speed;
if (hu->oper_speed)
oper_speed = hu->oper_speed;
else
oper_speed = hu->proto->oper_speed;
if (oper_speed && init_speed && oper_speed != init_speed)
speed_change = 1;
/* Check that the controller is ready */
err = intel_wait_booting(hu);
clear_bit(STATE_BOOTING, &intel->flags);
/* In case of timeout, try to continue anyway */
if (err && err != -ETIMEDOUT)
return err;
set_bit(STATE_BOOTLOADER, &intel->flags);
/* Read the Intel version information to determine if the device
* is in bootloader mode or if it already has operational firmware
* loaded.
*/
err = btintel_read_version(hdev, &ver);
if (err)
return err;
/* The hardware platform number has a fixed value of 0x37 and
* for now only accept this single value.
*/
if (ver.hw_platform != 0x37) {
bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
ver.hw_platform);
return -EINVAL;
}
/* Check for supported iBT hardware variants of this firmware
* loading method.
*
* This check has been put in place to ensure correct forward
* compatibility options when newer hardware variants come along.
*/
switch (ver.hw_variant) {
case 0x0b: /* LnP */
case 0x0c: /* WsP */
case 0x12: /* ThP */
break;
default:
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
ver.hw_variant);
return -EINVAL;
}
btintel_version_info(hdev, &ver);
/* The firmware variant determines if the device is in bootloader
* mode or is running operational firmware. The value 0x06 identifies
* the bootloader and the value 0x23 identifies the operational
* firmware.
*
* When the operational firmware is already present, then only
* the check for valid Bluetooth device address is needed. This
* determines if the device will be added as configured or
* unconfigured controller.
*
* It is not possible to use the Secure Boot Parameters in this
* case since that command is only available in bootloader mode.
*/
if (ver.fw_variant == 0x23) {
clear_bit(STATE_BOOTLOADER, &intel->flags);
btintel_check_bdaddr(hdev);
return 0;
}
/* If the device is not in bootloader mode, then the only possible
* choice is to return an error and abort the device initialization.
*/
if (ver.fw_variant != 0x06) {
bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)",
ver.fw_variant);
return -ENODEV;
}
/* Read the secure boot parameters to identify the operating
* details of the bootloader.
*/
err = btintel_read_boot_params(hdev, ¶ms);
if (err)
return err;
/* It is required that every single firmware fragment is acknowledged
* with a command complete event. If the boot parameters indicate
* that this bootloader does not send them, then abort the setup.
*/
if (params.limited_cce != 0x00) {
bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
params.limited_cce);
return -EINVAL;
}
/* If the OTP has no valid Bluetooth device address, then there will
* also be no valid address for the operational firmware.
*/
if (!bacmp(¶ms.otp_bdaddr, BDADDR_ANY)) {
bt_dev_info(hdev, "No device address configured");
set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
}
/* With this Intel bootloader only the hardware variant and device
* revision information are used to select the right firmware for SfP
* and WsP.
*
* The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
*
* Currently the supported hardware variants are:
* 11 (0x0b) for iBT 3.0 (LnP/SfP)
* 12 (0x0c) for iBT 3.5 (WsP)
*
* For ThP/JfP and for future SKU's, the FW name varies based on HW
* variant, HW revision and FW revision, as these are dependent on CNVi
* and RF Combination.
*
* 18 (0x12) for iBT3.5 (ThP/JfP)
*
* The firmware file name for these will be
* ibt-<hw_variant>-<hw_revision>-<fw_revision>.sfi.
*
*/
switch (ver.hw_variant) {
case 0x0b: /* SfP */
case 0x0c: /* WsP */
snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.sfi",
le16_to_cpu(ver.hw_variant),
le16_to_cpu(params.dev_revid));
break;
case 0x12: /* ThP */
snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u-%u.sfi",
le16_to_cpu(ver.hw_variant),
le16_to_cpu(ver.hw_revision),
le16_to_cpu(ver.fw_revision));
break;
default:
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
ver.hw_variant);
return -EINVAL;
}
err = request_firmware(&fw, fwname, &hdev->dev);
if (err < 0) {
bt_dev_err(hdev, "Failed to load Intel firmware file (%d)",
err);
return err;
}
bt_dev_info(hdev, "Found device firmware: %s", fwname);
/* Save the DDC file name for later */
switch (ver.hw_variant) {
case 0x0b: /* SfP */
case 0x0c: /* WsP */
snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.ddc",
le16_to_cpu(ver.hw_variant),
le16_to_cpu(params.dev_revid));
break;
case 0x12: /* ThP */
snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u-%u.ddc",
le16_to_cpu(ver.hw_variant),
le16_to_cpu(ver.hw_revision),
le16_to_cpu(ver.fw_revision));
break;
default:
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
ver.hw_variant);
return -EINVAL;
}
if (fw->size < 644) {
bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
fw->size);
err = -EBADF;
goto done;
}
set_bit(STATE_DOWNLOADING, &intel->flags);
/* Start firmware downloading and get boot parameter */
err = btintel_download_firmware(hdev, fw, &boot_param);
if (err < 0)
goto done;
set_bit(STATE_FIRMWARE_LOADED, &intel->flags);
bt_dev_info(hdev, "Waiting for firmware download to complete");
/* Before switching the device into operational mode and with that
* booting the loaded firmware, wait for the bootloader notification
* that all fragments have been successfully received.
*
* When the event processing receives the notification, then the
* STATE_DOWNLOADING flag will be cleared.
*
* The firmware loading should not take longer than 5 seconds
* and thus just timeout if that happens and fail the setup
* of this device.
*/
err = wait_on_bit_timeout(&intel->flags, STATE_DOWNLOADING,
TASK_INTERRUPTIBLE,
msecs_to_jiffies(5000));
if (err == -EINTR) {
bt_dev_err(hdev, "Firmware loading interrupted");
err = -EINTR;
goto done;
}
if (err) {
bt_dev_err(hdev, "Firmware loading timeout");
err = -ETIMEDOUT;
goto done;
}
if (test_bit(STATE_FIRMWARE_FAILED, &intel->flags)) {
bt_dev_err(hdev, "Firmware loading failed");
err = -ENOEXEC;
goto done;
}
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
done:
release_firmware(fw);
if (err < 0)
return err;
/* We need to restore the default speed before Intel reset */
if (speed_change) {
err = intel_set_baudrate(hu, init_speed);
if (err)
return err;
}
calltime = ktime_get();
set_bit(STATE_BOOTING, &intel->flags);
err = btintel_send_intel_reset(hdev, boot_param);
if (err)
return err;
/* The bootloader will not indicate when the device is ready. This
* is done by the operational firmware sending bootup notification.
*
* Booting into operational firmware should not take longer than
* 1 second. However if that happens, then just fail the setup
* since something went wrong.
*/
bt_dev_info(hdev, "Waiting for device to boot");
err = intel_wait_booting(hu);
if (err)
return err;
clear_bit(STATE_BOOTING, &intel->flags);
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
bt_dev_info(hdev, "Device booted in %llu usecs", duration);
/* Enable LPM if matching pdev with wakeup enabled, set TX active
* until further LPM TX notification.
*/
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *dev = list_entry(p, struct intel_device,
list);
if (!hu->tty->dev)
break;
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
if (device_may_wakeup(&dev->pdev->dev)) {
set_bit(STATE_LPM_ENABLED, &intel->flags);
set_bit(STATE_TX_ACTIVE, &intel->flags);
}
break;
}
}
mutex_unlock(&intel_device_list_lock);
/* Ignore errors, device can work without DDC parameters */
btintel_load_ddc_config(hdev, fwname);
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
kfree_skb(skb);
if (speed_change) {
err = intel_set_baudrate(hu, oper_speed);
if (err)
return err;
}
bt_dev_info(hdev, "Setup complete");
clear_bit(STATE_BOOTLOADER, &intel->flags);
return 0;
}
static int intel_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_uart *hu = hci_get_drvdata(hdev);
struct intel_data *intel = hu->priv;
struct hci_event_hdr *hdr;
if (!test_bit(STATE_BOOTLOADER, &intel->flags) &&
!test_bit(STATE_BOOTING, &intel->flags))
goto recv;
hdr = (void *)skb->data;
/* When the firmware loading completes the device sends
* out a vendor specific event indicating the result of
* the firmware loading.
*/
if (skb->len == 7 && hdr->evt == 0xff && hdr->plen == 0x05 &&
skb->data[2] == 0x06) {
if (skb->data[3] != 0x00)
set_bit(STATE_FIRMWARE_FAILED, &intel->flags);
if (test_and_clear_bit(STATE_DOWNLOADING, &intel->flags) &&
test_bit(STATE_FIRMWARE_LOADED, &intel->flags))
wake_up_bit(&intel->flags, STATE_DOWNLOADING);
/* When switching to the operational firmware the device
* sends a vendor specific event indicating that the bootup
* completed.
*/
} else if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 &&
skb->data[2] == 0x02) {
if (test_and_clear_bit(STATE_BOOTING, &intel->flags))
wake_up_bit(&intel->flags, STATE_BOOTING);
}
recv:
return hci_recv_frame(hdev, skb);
}
static void intel_recv_lpm_notify(struct hci_dev *hdev, int value)
{
struct hci_uart *hu = hci_get_drvdata(hdev);
struct intel_data *intel = hu->priv;
bt_dev_dbg(hdev, "TX idle notification (%d)", value);
if (value) {
set_bit(STATE_TX_ACTIVE, &intel->flags);
schedule_work(&intel->busy_work);
} else {
clear_bit(STATE_TX_ACTIVE, &intel->flags);
}
}
static int intel_recv_lpm(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_lpm_pkt *lpm = (void *)skb->data;
struct hci_uart *hu = hci_get_drvdata(hdev);
struct intel_data *intel = hu->priv;
switch (lpm->opcode) {
case LPM_OP_TX_NOTIFY:
if (lpm->dlen < 1) {
bt_dev_err(hu->hdev, "Invalid LPM notification packet");
break;
}
intel_recv_lpm_notify(hdev, lpm->data[0]);
break;
case LPM_OP_SUSPEND_ACK:
set_bit(STATE_SUSPENDED, &intel->flags);
if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags))
wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION);
break;
case LPM_OP_RESUME_ACK:
clear_bit(STATE_SUSPENDED, &intel->flags);
if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags))
wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION);
break;
default:
bt_dev_err(hdev, "Unknown LPM opcode (%02x)", lpm->opcode);
break;
}
kfree_skb(skb);
return 0;
}
#define INTEL_RECV_LPM \
.type = HCI_LPM_PKT, \
.hlen = HCI_LPM_HDR_SIZE, \
.loff = 1, \
.lsize = 1, \
.maxlen = HCI_LPM_MAX_SIZE
static const struct h4_recv_pkt intel_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = intel_recv_event },
{ INTEL_RECV_LPM, .recv = intel_recv_lpm },
};
static int intel_recv(struct hci_uart *hu, const void *data, int count)
{
struct intel_data *intel = hu->priv;
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
return -EUNATCH;
intel->rx_skb = h4_recv_buf(hu->hdev, intel->rx_skb, data, count,
intel_recv_pkts,
ARRAY_SIZE(intel_recv_pkts));
if (IS_ERR(intel->rx_skb)) {
int err = PTR_ERR(intel->rx_skb);
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
intel->rx_skb = NULL;
return err;
}
return count;
}
static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
struct intel_data *intel = hu->priv;
struct list_head *p;