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
|
/*
* Pulse Eight HDMI CEC driver
*
* Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version of 2 of the License, or (at your
* option) any later version. See the file COPYING in the main directory of
* this archive for more details.
*/
/*
* Notes:
*
* - Devices with firmware version < 2 do not store their configuration in
* EEPROM.
*
* - In autonomous mode, only messages from a TV will be acknowledged, even
* polling messages. Upon receiving a message from a TV, the dongle will
* respond to messages from any logical address.
*
* - In autonomous mode, the dongle will by default reply Feature Abort
* [Unrecognized Opcode] when it receives Give Device Vendor ID. It will
* however observe vendor ID's reported by other devices and possibly
* alter this behavior. When TV's (and TV's only) report that their vendor ID
* is LG (0x00e091), the dongle will itself reply that it has the same vendor
* ID, and it will respond to at least one vendor specific command.
*
* - In autonomous mode, the dongle is known to attempt wakeup if it receives
* <User Control Pressed> ["Power On"], ["Power] or ["Power Toggle"], or if it
* receives <Set Stream Path> with its own physical address. It also does this
* if it receives <Vendor Specific Command> [0x03 0x00] from an LG TV.
*/
#include <linux/completion.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/serio.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/delay.h>
#include <media/cec.h>
MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
MODULE_DESCRIPTION("Pulse Eight HDMI CEC driver");
MODULE_LICENSE("GPL");
static int debug;
static int persistent_config;
module_param(debug, int, 0644);
module_param(persistent_config, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-1)");
MODULE_PARM_DESC(persistent_config, "read config from persistent memory (0-1)");
enum pulse8_msgcodes {
MSGCODE_NOTHING = 0,
MSGCODE_PING,
MSGCODE_TIMEOUT_ERROR,
MSGCODE_HIGH_ERROR,
MSGCODE_LOW_ERROR,
MSGCODE_FRAME_START,
MSGCODE_FRAME_DATA,
MSGCODE_RECEIVE_FAILED,
MSGCODE_COMMAND_ACCEPTED, /* 0x08 */
MSGCODE_COMMAND_REJECTED,
MSGCODE_SET_ACK_MASK,
MSGCODE_TRANSMIT,
MSGCODE_TRANSMIT_EOM,
MSGCODE_TRANSMIT_IDLETIME,
MSGCODE_TRANSMIT_ACK_POLARITY,
MSGCODE_TRANSMIT_LINE_TIMEOUT,
MSGCODE_TRANSMIT_SUCCEEDED, /* 0x10 */
MSGCODE_TRANSMIT_FAILED_LINE,
MSGCODE_TRANSMIT_FAILED_ACK,
MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA,
MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE,
MSGCODE_FIRMWARE_VERSION,
MSGCODE_START_BOOTLOADER,
MSGCODE_GET_BUILDDATE,
MSGCODE_SET_CONTROLLED, /* 0x18 */
MSGCODE_GET_AUTO_ENABLED,
MSGCODE_SET_AUTO_ENABLED,
MSGCODE_GET_DEFAULT_LOGICAL_ADDRESS,
MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS,
MSGCODE_GET_LOGICAL_ADDRESS_MASK,
MSGCODE_SET_LOGICAL_ADDRESS_MASK,
MSGCODE_GET_PHYSICAL_ADDRESS,
MSGCODE_SET_PHYSICAL_ADDRESS, /* 0x20 */
MSGCODE_GET_DEVICE_TYPE,
MSGCODE_SET_DEVICE_TYPE,
MSGCODE_GET_HDMI_VERSION,
MSGCODE_SET_HDMI_VERSION,
MSGCODE_GET_OSD_NAME,
MSGCODE_SET_OSD_NAME,
MSGCODE_WRITE_EEPROM,
MSGCODE_GET_ADAPTER_TYPE, /* 0x28 */
MSGCODE_SET_ACTIVE_SOURCE,
MSGCODE_FRAME_EOM = 0x80,
MSGCODE_FRAME_ACK = 0x40,
};
#define MSGSTART 0xff
#define MSGEND 0xfe
#define MSGESC 0xfd
#define MSGOFFSET 3
#define DATA_SIZE 256
#define PING_PERIOD (15 * HZ)
struct pulse8 {
struct device *dev;
struct serio *serio;
struct cec_adapter *adap;
unsigned int vers;
struct completion cmd_done;
struct work_struct work;
struct delayed_work ping_eeprom_work;
struct cec_msg rx_msg;
u8 data[DATA_SIZE];
unsigned int len;
u8 buf[DATA_SIZE];
unsigned int idx;
bool escape;
bool started;
struct mutex config_lock;
struct mutex write_lock;
bool config_pending;
bool restoring_config;
bool autonomous;
};
static void pulse8_ping_eeprom_work_handler(struct work_struct *work);
static void pulse8_irq_work_handler(struct work_struct *work)
{
struct pulse8 *pulse8 =
container_of(work, struct pulse8, work);
switch (pulse8->data[0] & 0x3f) {
case MSGCODE_FRAME_DATA:
cec_received_msg(pulse8->adap, &pulse8->rx_msg);
break;
case MSGCODE_TRANSMIT_SUCCEEDED:
cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_OK);
break;
case MSGCODE_TRANSMIT_FAILED_ACK:
cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_NACK);
break;
case MSGCODE_TRANSMIT_FAILED_LINE:
case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_ERROR);
break;
}
}
static irqreturn_t pulse8_interrupt(struct serio *serio, unsigned char data,
unsigned int flags)
{
struct pulse8 *pulse8 = serio_get_drvdata(serio);
if (!pulse8->started && data != MSGSTART)
return IRQ_HANDLED;
if (data == MSGESC) {
pulse8->escape = true;
return IRQ_HANDLED;
}
if (pulse8->escape) {
data += MSGOFFSET;
pulse8->escape = false;
} else if (data == MSGEND) {
struct cec_msg *msg = &pulse8->rx_msg;
if (debug)
dev_info(pulse8->dev, "received: %*ph\n",
pulse8->idx, pulse8->buf);
pulse8->data[0] = pulse8->buf[0];
switch (pulse8->buf[0] & 0x3f) {
case MSGCODE_FRAME_START:
msg->len = 1;
msg->msg[0] = pulse8->buf[1];
break;
case MSGCODE_FRAME_DATA:
if (msg->len == CEC_MAX_MSG_SIZE)
break;
msg->msg[msg->len++] = pulse8->buf[1];
if (pulse8->buf[0] & MSGCODE_FRAME_EOM)
schedule_work(&pulse8->work);
break;
case MSGCODE_TRANSMIT_SUCCEEDED:
case MSGCODE_TRANSMIT_FAILED_LINE:
case MSGCODE_TRANSMIT_FAILED_ACK:
case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
schedule_work(&pulse8->work);
break;
case MSGCODE_HIGH_ERROR:
case MSGCODE_LOW_ERROR:
case MSGCODE_RECEIVE_FAILED:
case MSGCODE_TIMEOUT_ERROR:
break;
case MSGCODE_COMMAND_ACCEPTED:
case MSGCODE_COMMAND_REJECTED:
default:
if (pulse8->idx == 0)
break;
memcpy(pulse8->data, pulse8->buf, pulse8->idx);
pulse8->len = pulse8->idx;
complete(&pulse8->cmd_done);
break;
}
pulse8->idx = 0;
pulse8->started = false;
return IRQ_HANDLED;
} else if (data == MSGSTART) {
pulse8->idx = 0;
pulse8->started = true;
return IRQ_HANDLED;
}
if (pulse8->idx >= DATA_SIZE) {
dev_dbg(pulse8->dev,
"throwing away %d bytes of garbage\n", pulse8->idx);
pulse8->idx = 0;
}
pulse8->buf[pulse8->idx++] = data;
return IRQ_HANDLED;
}
static void pulse8_disconnect(struct serio *serio)
{
struct pulse8 *pulse8 = serio_get_drvdata(serio);
cec_unregister_adapter(pulse8->adap);
cancel_delayed_work_sync(&pulse8->ping_eeprom_work);
dev_info(&serio->dev, "disconnected\n");
serio_close(serio);
serio_set_drvdata(serio, NULL);
kfree(pulse8);
}
static int pulse8_send(struct serio *serio, const u8 *command, u8 cmd_len)
{
int err = 0;
err = serio_write(serio, MSGSTART);
if (err)
return err;
for (; !err && cmd_len; command++, cmd_len--) {
if (*command >= MSGESC) {
err = serio_write(serio, MSGESC);
if (!err)
err = serio_write(serio, *command - MSGOFFSET);
} else {
err = serio_write(serio, *command);
}
}
if (!err)
err = serio_write(serio, MSGEND);
return err;
}
static int pulse8_send_and_wait_once(struct pulse8 *pulse8,
const u8 *cmd, u8 cmd_len,
u8 response, u8 size)
{
int err;
/*dev_info(pulse8->dev, "transmit: %*ph\n", cmd_len, cmd);*/
init_completion(&pulse8->cmd_done);
err = pulse8_send(pulse8->serio, cmd, cmd_len);
if (err)
return err;
if (!wait_for_completion_timeout(&pulse8->cmd_done, HZ))
return -ETIMEDOUT;
if ((pulse8->data[0] & 0x3f) == MSGCODE_COMMAND_REJECTED &&
cmd[0] != MSGCODE_SET_CONTROLLED &&
cmd[0] != MSGCODE_SET_AUTO_ENABLED &&
cmd[0] != MSGCODE_GET_BUILDDATE)
return -ENOTTY;
if (response &&
((pulse8->data[0] & 0x3f) != response || pulse8->len < size + 1)) {
dev_info(pulse8->dev, "transmit: failed %02x\n",
pulse8->data[0] & 0x3f);
return -EIO;
}
return 0;
}
static int pulse8_send_and_wait(struct pulse8 *pulse8,
const u8 *cmd, u8 cmd_len, u8 response, u8 size)
{
u8 cmd_sc[2];
int err;
mutex_lock(&pulse8->write_lock);
err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len, response, size);
if (err == -ENOTTY) {
cmd_sc[0] = MSGCODE_SET_CONTROLLED;
cmd_sc[1] = 1;
err = pulse8_send_and_wait_once(pulse8, cmd_sc, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
if (err)
goto unlock;
err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len,
response, size);
}
unlock:
mutex_unlock(&pulse8->write_lock);
return err == -ENOTTY ? -EIO : err;
}
static int pulse8_setup(struct pulse8 *pulse8, struct serio *serio,
struct cec_log_addrs *log_addrs, u16 *pa)
{
u8 *data = pulse8->data + 1;
u8 cmd[2];
int err;
struct tm tm;
time64_t date;
pulse8->vers = 0;
cmd[0] = MSGCODE_FIRMWARE_VERSION;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
if (err)
return err;
pulse8->vers = (data[0] << 8) | data[1];
dev_info(pulse8->dev, "Firmware version %04x\n", pulse8->vers);
if (pulse8->vers < 2) {
*pa = CEC_PHYS_ADDR_INVALID;
return 0;
}
cmd[0] = MSGCODE_GET_BUILDDATE;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 4);
if (err)
return err;
date = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
time64_to_tm(date, 0, &tm);
dev_info(pulse8->dev, "Firmware build date %04ld.%02d.%02d %02d:%02d:%02d\n",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
dev_dbg(pulse8->dev, "Persistent config:\n");
cmd[0] = MSGCODE_GET_AUTO_ENABLED;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
if (err)
return err;
pulse8->autonomous = data[0];
dev_dbg(pulse8->dev, "Autonomous mode: %s",
data[0] ? "on" : "off");
cmd[0] = MSGCODE_GET_DEVICE_TYPE;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
if (err)
return err;
log_addrs->primary_device_type[0] = data[0];
dev_dbg(pulse8->dev, "Primary device type: %d\n", data[0]);
switch (log_addrs->primary_device_type[0]) {
case CEC_OP_PRIM_DEVTYPE_TV:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TV;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TV;
break;
case CEC_OP_PRIM_DEVTYPE_RECORD:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_RECORD;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_RECORD;
break;
case CEC_OP_PRIM_DEVTYPE_TUNER:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TUNER;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TUNER;
break;
case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_PLAYBACK;
break;
case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM;
break;
case CEC_OP_PRIM_DEVTYPE_SWITCH:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
break;
case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_SPECIFIC;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
break;
default:
log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
dev_info(pulse8->dev, "Unknown Primary Device Type: %d\n",
log_addrs->primary_device_type[0]);
break;
}
cmd[0] = MSGCODE_GET_LOGICAL_ADDRESS_MASK;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
if (err)
return err;
log_addrs->log_addr_mask = (data[0] << 8) | data[1];
dev_dbg(pulse8->dev, "Logical address ACK mask: %x\n",
log_addrs->log_addr_mask);
if (log_addrs->log_addr_mask)
log_addrs->num_log_addrs = 1;
cmd[0] = MSGCODE_GET_PHYSICAL_ADDRESS;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
if (err)
return err;
*pa = (data[0] << 8) | data[1];
dev_dbg(pulse8->dev, "Physical address: %x.%x.%x.%x\n",
cec_phys_addr_exp(*pa));
cmd[0] = MSGCODE_GET_HDMI_VERSION;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
if (err)
return err;
log_addrs->cec_version = data[0];
dev_dbg(pulse8->dev, "CEC version: %d\n", log_addrs->cec_version);
cmd[0] = MSGCODE_GET_OSD_NAME;
err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 0);
if (err)
return err;
strscpy(log_addrs->osd_name, data, sizeof(log_addrs->osd_name));
dev_dbg(pulse8->dev, "OSD name: %s\n", log_addrs->osd_name);
return 0;
}
static int pulse8_apply_persistent_config(struct pulse8 *pulse8,
struct cec_log_addrs *log_addrs,
u16 pa)
{
int err;
err = cec_s_log_addrs(pulse8->adap, log_addrs, false);
if (err)
return err;
cec_s_phys_addr(pulse8->adap, pa, false);
return 0;
}
static int pulse8_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
struct pulse8 *pulse8 = cec_get_drvdata(adap);
u8 cmd[16];
int err;
cmd[0] = MSGCODE_SET_CONTROLLED;
cmd[1] = enable;
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
return enable ? err : 0;
}
static int pulse8_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
{
struct pulse8 *pulse8 = cec_get_drvdata(adap);
u16 mask = 0;
u16 pa = adap->phys_addr;
u8 cmd[16];
int err = 0;
mutex_lock(&pulse8->config_lock);
if (log_addr != CEC_LOG_ADDR_INVALID)
mask = 1 << log_addr;
cmd[0] = MSGCODE_SET_ACK_MASK;
cmd[1] = mask >> 8;
cmd[2] = mask & 0xff;
err = pulse8_send_and_wait(pulse8, cmd, 3,
MSGCODE_COMMAND_ACCEPTED, 0);
if ((err && mask != 0) || pulse8->restoring_config)
goto unlock;
cmd[0] = MSGCODE_SET_AUTO_ENABLED;
cmd[1] = log_addr == CEC_LOG_ADDR_INVALID ? 0 : 1;
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
pulse8->autonomous = cmd[1];
if (log_addr == CEC_LOG_ADDR_INVALID)
goto unlock;
cmd[0] = MSGCODE_SET_DEVICE_TYPE;
cmd[1] = adap->log_addrs.primary_device_type[0];
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
switch (adap->log_addrs.primary_device_type[0]) {
case CEC_OP_PRIM_DEVTYPE_TV:
mask = CEC_LOG_ADDR_MASK_TV;
break;
case CEC_OP_PRIM_DEVTYPE_RECORD:
mask = CEC_LOG_ADDR_MASK_RECORD;
break;
case CEC_OP_PRIM_DEVTYPE_TUNER:
mask = CEC_LOG_ADDR_MASK_TUNER;
break;
case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
mask = CEC_LOG_ADDR_MASK_PLAYBACK;
break;
case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
mask = CEC_LOG_ADDR_MASK_AUDIOSYSTEM;
break;
case CEC_OP_PRIM_DEVTYPE_SWITCH:
mask = CEC_LOG_ADDR_MASK_UNREGISTERED;
break;
case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
mask = CEC_LOG_ADDR_MASK_SPECIFIC;
break;
default:
mask = 0;
break;
}
cmd[0] = MSGCODE_SET_LOGICAL_ADDRESS_MASK;
cmd[1] = mask >> 8;
cmd[2] = mask & 0xff;
err = pulse8_send_and_wait(pulse8, cmd, 3,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
cmd[0] = MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS;
cmd[1] = log_addr;
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
cmd[0] = MSGCODE_SET_PHYSICAL_ADDRESS;
cmd[1] = pa >> 8;
cmd[2] = pa & 0xff;
err = pulse8_send_and_wait(pulse8, cmd, 3,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
cmd[0] = MSGCODE_SET_HDMI_VERSION;
cmd[1] = adap->log_addrs.cec_version;
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
if (adap->log_addrs.osd_name[0]) {
size_t osd_len = strlen(adap->log_addrs.osd_name);
char *osd_str = cmd + 1;
cmd[0] = MSGCODE_SET_OSD_NAME;
strscpy(cmd + 1, adap->log_addrs.osd_name, sizeof(cmd) - 1);
if (osd_len < 4) {
memset(osd_str + osd_len, ' ', 4 - osd_len);
osd_len = 4;
osd_str[osd_len] = '\0';
strscpy(adap->log_addrs.osd_name, osd_str,
sizeof(adap->log_addrs.osd_name));
}
err = pulse8_send_and_wait(pulse8, cmd, 1 + osd_len,
MSGCODE_COMMAND_ACCEPTED, 0);
if (err)
goto unlock;
}
unlock:
if (pulse8->restoring_config)
pulse8->restoring_config = false;
else
pulse8->config_pending = true;
mutex_unlock(&pulse8->config_lock);
return log_addr == CEC_LOG_ADDR_INVALID ? 0 : err;
}
static int pulse8_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct pulse8 *pulse8 = cec_get_drvdata(adap);
u8 cmd[2];
unsigned int i;
int err;
cmd[0] = MSGCODE_TRANSMIT_IDLETIME;
cmd[1] = signal_free_time;
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
cmd[0] = MSGCODE_TRANSMIT_ACK_POLARITY;
cmd[1] = cec_msg_is_broadcast(msg);
if (!err)
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
cmd[0] = msg->len == 1 ? MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
cmd[1] = msg->msg[0];
if (!err)
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
if (!err && msg->len > 1) {
cmd[0] = msg->len == 2 ? MSGCODE_TRANSMIT_EOM :
MSGCODE_TRANSMIT;
cmd[1] = msg->msg[1];
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
for (i = 0; !err && i + 2 < msg->len; i++) {
cmd[0] = (i + 2 == msg->len - 1) ?
MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
cmd[1] = msg->msg[i + 2];
err = pulse8_send_and_wait(pulse8, cmd, 2,
MSGCODE_COMMAND_ACCEPTED, 1);
}
}
return err;
}
static int pulse8_received(struct cec_adapter *adap, struct cec_msg *msg)
{
return -ENOMSG;
}
static const struct cec_adap_ops pulse8_cec_adap_ops = {
.adap_enable = pulse8_cec_adap_enable,
.adap_log_addr = pulse8_cec_adap_log_addr,
.adap_transmit = pulse8_cec_adap_transmit,
.received = pulse8_received,
};
static int pulse8_connect(struct serio *serio, struct serio_driver *drv)
{
u32 caps = CEC_CAP_DEFAULTS | CEC_CAP_PHYS_ADDR | CEC_CAP_MONITOR_ALL;
struct pulse8 *pulse8;
int err = -ENOMEM;
struct cec_log_addrs log_addrs = {};
u16 pa = CEC_PHYS_ADDR_INVALID;
pulse8 = kzalloc(sizeof(*pulse8), GFP_KERNEL);
if (!pulse8)
return -ENOMEM;
pulse8->serio = serio;
pulse8->adap = cec_allocate_adapter(&pulse8_cec_adap_ops, pulse8,
dev_name(&serio->dev), caps, 1);
err = PTR_ERR_OR_ZERO(pulse8->adap);
if (err < 0)
goto free_device;
pulse8->dev = &serio->dev;
serio_set_drvdata(serio, pulse8);
INIT_WORK(&pulse8->work, pulse8_irq_work_handler);
mutex_init(&pulse8->write_lock);
mutex_init(&pulse8->config_lock);
pulse8->config_pending = false;
err = serio_open(serio, drv);
if (err)
goto delete_adap;
err = pulse8_setup(pulse8, serio, &log_addrs, &pa);
if (err)
goto close_serio;
err = cec_register_adapter(pulse8->adap, &serio->dev);
if (err < 0)
goto close_serio;
pulse8->dev = &pulse8->adap->devnode.dev;
if (persistent_config && pulse8->autonomous) {
err = pulse8_apply_persistent_config(pulse8, &log_addrs, pa);
if (err)
goto close_serio;
pulse8->restoring_config = true;
}
INIT_DELAYED_WORK(&pulse8->ping_eeprom_work,
pulse8_ping_eeprom_work_handler);
schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
return 0;
close_serio:
serio_close(serio);
delete_adap:
cec_delete_adapter(pulse8->adap);
serio_set_drvdata(serio, NULL);
free_device:
kfree(pulse8);
return err;
}
static void pulse8_ping_eeprom_work_handler(struct work_struct *work)
{
struct pulse8 *pulse8 =
container_of(work, struct pulse8, ping_eeprom_work.work);
u8 cmd;
schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
cmd = MSGCODE_PING;
pulse8_send_and_wait(pulse8, &cmd, 1,
MSGCODE_COMMAND_ACCEPTED, 0);
if (pulse8->vers < 2)
return;
mutex_lock(&pulse8->config_lock);
if (pulse8->config_pending && persistent_config) {
dev_dbg(pulse8->dev, "writing pending config to EEPROM\n");
cmd = MSGCODE_WRITE_EEPROM;
if (pulse8_send_and_wait(pulse8, &cmd, 1,
MSGCODE_COMMAND_ACCEPTED, 0))
dev_info(pulse8->dev, "failed to write pending config to EEPROM\n");
else
pulse8->config_pending = false;
}
mutex_unlock(&pulse8->config_lock);
}
static const struct serio_device_id pulse8_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_PULSE8_CEC,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, pulse8_serio_ids);
static struct serio_driver pulse8_drv = {
.driver = {
.name = "pulse8-cec",
},
.description = "Pulse Eight HDMI CEC driver",
.id_table = pulse8_serio_ids,
.interrupt = pulse8_interrupt,
.connect = pulse8_connect,
.disconnect = pulse8_disconnect,
};
module_serio_driver(pulse8_drv);
|