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
|
/* Copyright 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* MKBP keyboard protocol
*/
#include "atomic.h"
#include "base_state.h"
#include "button.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "ec_commands.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "keyboard_config.h"
#include "keyboard_mkbp.h"
#include "keyboard_protocol.h"
#include "keyboard_raw.h"
#include "keyboard_scan.h"
#include "keyboard_test.h"
#include "lid_switch.h"
#include "mkbp_event.h"
#include "power_button.h"
#include "system.h"
#include "tablet_mode.h"
#include "task.h"
#include "timer.h"
#include "util.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_KEYBOARD, outstr)
#define CPRINTS(format, args...) cprints(CC_KEYBOARD, format, ## args)
/*
* Common FIFO depth. This needs to be big enough not to overflow if a
* series of keys is pressed in rapid succession and the kernel is too busy
* to read them out right away.
*
* RAM usage is (depth * #cols); A 16-entry FIFO will consume 16x13=208 bytes,
* which is non-trivial but not horrible.
*/
#define FIFO_DEPTH 16
/* Changes to col,row here need to also be reflected in kernel.
* drivers/input/mkbp.c ... see KEY_BATTERY.
*/
#define BATTERY_KEY_COL 0
#define BATTERY_KEY_ROW 7
#define BATTERY_KEY_ROW_MASK BIT(BATTERY_KEY_ROW)
static uint32_t fifo_start; /* first entry */
static uint32_t fifo_end; /* last entry */
static uint32_t fifo_entries; /* number of existing entries */
static struct ec_response_get_next_event fifo[FIFO_DEPTH];
/*
* Mutex for critical sections of mkbp_fifo_add(), which is called
* from various tasks.
*/
K_MUTEX_DEFINE(fifo_add_mutex);
/*
* Mutex for critical sections of fifo_remove(), which is called from the
* hostcmd task and from keyboard_clear_buffer().
*/
K_MUTEX_DEFINE(fifo_remove_mutex);
/* Button and switch state. */
static uint32_t mkbp_button_state;
static uint32_t mkbp_switch_state;
static bool mkbp_init_done;
#ifndef HAS_TASK_KEYSCAN
/* Keys simulated-pressed */
static uint8_t __bss_slow simulated_key[KEYBOARD_COLS_MAX];
uint8_t keyboard_cols = KEYBOARD_COLS_MAX;
#endif /* !defined(HAS_TASK_KEYSCAN) */
/* Config for mkbp protocol; does not include fields from scan config */
struct ec_mkbp_protocol_config {
uint32_t valid_mask; /* valid fields */
uint8_t flags; /* some flags (enum mkbp_config_flags) */
uint8_t valid_flags; /* which flags are valid */
/* maximum depth to allow for fifo (0 = no keyscan output) */
uint8_t fifo_max_depth;
} __packed;
static struct ec_mkbp_protocol_config config = {
.valid_mask = EC_MKBP_VALID_SCAN_PERIOD | EC_MKBP_VALID_POLL_TIMEOUT |
EC_MKBP_VALID_MIN_POST_SCAN_DELAY |
EC_MKBP_VALID_OUTPUT_SETTLE | EC_MKBP_VALID_DEBOUNCE_DOWN |
EC_MKBP_VALID_DEBOUNCE_UP | EC_MKBP_VALID_FIFO_MAX_DEPTH,
.valid_flags = EC_MKBP_FLAGS_ENABLE,
.flags = EC_MKBP_FLAGS_ENABLE,
.fifo_max_depth = FIFO_DEPTH,
};
static int get_data_size(enum ec_mkbp_event e)
{
switch (e) {
case EC_MKBP_EVENT_KEY_MATRIX:
return keyboard_cols;
#ifdef CONFIG_HOST_EVENT64
case EC_MKBP_EVENT_HOST_EVENT64:
return sizeof(uint64_t);
#endif
case EC_MKBP_EVENT_HOST_EVENT:
case EC_MKBP_EVENT_BUTTON:
case EC_MKBP_EVENT_SWITCH:
case EC_MKBP_EVENT_SYSRQ:
return sizeof(uint32_t);
default:
/* For unknown types, say it's 0. */
return 0;
}
}
/**
* Pop MKBP event data from FIFO
*
* @return EC_SUCCESS if entry popped, EC_ERROR_UNKNOWN if FIFO is empty
*/
static int fifo_remove(uint8_t *buffp)
{
int size;
mutex_lock(&fifo_remove_mutex);
if (!fifo_entries) {
/* no entry remaining in FIFO : return last known state */
int last = (fifo_start + FIFO_DEPTH - 1) % FIFO_DEPTH;
size = get_data_size(fifo[last].event_type);
memcpy(buffp, &fifo[last].data, size);
mutex_unlock(&fifo_remove_mutex);
/*
* Bail out without changing any FIFO indices and let the
* caller know something strange happened. The buffer will
* will contain the last known state of the keyboard.
*/
return EC_ERROR_UNKNOWN;
}
/* Return just the event data. */
if (buffp) {
size = get_data_size(fifo[fifo_start].event_type);
/* skip over event_type. */
memcpy(buffp, &fifo[fifo_start].data, size);
}
fifo_start = (fifo_start + 1) % FIFO_DEPTH;
atomic_sub(&fifo_entries, 1);
mutex_unlock(&fifo_remove_mutex);
return EC_SUCCESS;
}
/*****************************************************************************/
/* Interface */
void keyboard_clear_buffer(void)
{
int i, new_fifo_entries = 0;
CPRINTS("clear keyboard MKBP fifo");
/*
* Order of these locks is important to prevent deadlock since
* mkbp_fifo_add() may call fifo_remove().
*/
mutex_lock(&fifo_add_mutex);
mutex_lock(&fifo_remove_mutex);
/* Reset the end position */
fifo_end = fifo_start;
for (i = 0; i < fifo_entries; i++) {
int cur = (fifo_start + i) % FIFO_DEPTH;
/* Drop keyboard events */
if (fifo[cur].event_type == EC_MKBP_EVENT_KEY_MATRIX)
continue;
/* And move other events to the front */
memmove(&fifo[fifo_end], &fifo[cur], sizeof(fifo[cur]));
fifo_end = (fifo_end + 1) % FIFO_DEPTH;
++new_fifo_entries;
}
fifo_entries = new_fifo_entries;
mutex_unlock(&fifo_remove_mutex);
mutex_unlock(&fifo_add_mutex);
}
void mkbp_clear_fifo(void)
{
int i;
CPRINTS("clear MKBP fifo");
/*
* Order of these locks is important to prevent deadlock since
* mkbp_fifo_add() may call fifo_remove().
*/
mutex_lock(&fifo_add_mutex);
mutex_lock(&fifo_remove_mutex);
fifo_start = 0;
fifo_end = 0;
/* This assignment is safe since both mutexes are held. */
fifo_entries = 0;
for (i = 0; i < FIFO_DEPTH; i++)
memset(&fifo[i], 0, sizeof(struct ec_response_get_next_event));
mutex_unlock(&fifo_remove_mutex);
mutex_unlock(&fifo_add_mutex);
}
test_mockable int keyboard_fifo_add(const uint8_t *buffp)
{
return mkbp_fifo_add((uint8_t)EC_MKBP_EVENT_KEY_MATRIX, buffp);
}
test_mockable int mkbp_fifo_add(uint8_t event_type, const uint8_t *buffp)
{
uint8_t size;
/*
* If the data is a keyboard matrix and the keyboard protocol is not
* enabled, don't save the state to the FIFO or trigger an interrupt.
*/
if (!(config.flags & EC_MKBP_FLAGS_ENABLE) &&
(event_type == EC_MKBP_EVENT_KEY_MATRIX))
return EC_SUCCESS;
mutex_lock(&fifo_add_mutex);
if (fifo_entries >= config.fifo_max_depth) {
mutex_unlock(&fifo_add_mutex);
CPRINTS("MKBP common FIFO depth %d reached",
config.fifo_max_depth);
return EC_ERROR_OVERFLOW;
}
size = get_data_size(event_type);
fifo[fifo_end].event_type = event_type;
memcpy(&fifo[fifo_end].data, buffp, size);
fifo_end = (fifo_end + 1) % FIFO_DEPTH;
atomic_add(&fifo_entries, 1);
/*
* If our event didn't generate an interrupt then the host is still
* asleep. In this case, we don't want to queue our event, except if
* another event just woke the host (and wake is already in progress).
*/
if (!mkbp_send_event(event_type) && fifo_entries == 1)
fifo_remove(NULL);
mutex_unlock(&fifo_add_mutex);
return EC_SUCCESS;
}
void mkbp_update_switches(uint32_t sw, int state)
{
mkbp_switch_state &= ~BIT(sw);
mkbp_switch_state |= (!!state << sw);
/*
* Only inform AP mkbp changes when all switches initialized, in case
* of the middle states causing the weird behaviour in the AP side,
* especially when sysjumped while AP up.
*/
if (mkbp_init_done)
mkbp_fifo_add(EC_MKBP_EVENT_SWITCH,
(const uint8_t *)&mkbp_switch_state);
}
#ifdef CONFIG_LID_SWITCH
/**
* Handle lid changing state.
*/
static void mkbp_lid_change(void)
{
mkbp_update_switches(EC_MKBP_LID_OPEN, lid_is_open());
}
DECLARE_HOOK(HOOK_LID_CHANGE, mkbp_lid_change, HOOK_PRIO_LAST);
DECLARE_HOOK(HOOK_INIT, mkbp_lid_change, HOOK_PRIO_INIT_LID+1);
#endif
#ifdef CONFIG_TABLET_MODE_SWITCH
static void mkbp_tablet_mode_change(void)
{
mkbp_update_switches(EC_MKBP_TABLET_MODE, tablet_get_mode());
}
DECLARE_HOOK(HOOK_TABLET_MODE_CHANGE, mkbp_tablet_mode_change, HOOK_PRIO_LAST);
DECLARE_HOOK(HOOK_INIT, mkbp_tablet_mode_change, HOOK_PRIO_INIT_LID+1);
#endif
#ifdef CONFIG_BASE_ATTACHED_SWITCH
static void mkbp_base_attached_change(void)
{
mkbp_update_switches(EC_MKBP_BASE_ATTACHED, base_get_state());
}
DECLARE_HOOK(HOOK_BASE_ATTACHED_CHANGE, mkbp_base_attached_change,
HOOK_PRIO_LAST);
DECLARE_HOOK(HOOK_INIT, mkbp_base_attached_change, HOOK_PRIO_INIT_LID+1);
#endif
static void mkbp_report_switch_on_init(void)
{
/* All switches initialized, report switch state to AP */
mkbp_init_done = true;
mkbp_fifo_add(EC_MKBP_EVENT_SWITCH,
(const uint8_t *)&mkbp_switch_state);
}
DECLARE_HOOK(HOOK_INIT, mkbp_report_switch_on_init, HOOK_PRIO_LAST);
void keyboard_update_button(enum keyboard_button_type button, int is_pressed)
{
switch (button) {
case KEYBOARD_BUTTON_POWER:
mkbp_button_state &= ~BIT(EC_MKBP_POWER_BUTTON);
mkbp_button_state |= (is_pressed << EC_MKBP_POWER_BUTTON);
break;
case KEYBOARD_BUTTON_VOLUME_UP:
mkbp_button_state &= ~BIT(EC_MKBP_VOL_UP);
mkbp_button_state |= (is_pressed << EC_MKBP_VOL_UP);
break;
case KEYBOARD_BUTTON_VOLUME_DOWN:
mkbp_button_state &= ~BIT(EC_MKBP_VOL_DOWN);
mkbp_button_state |= (is_pressed << EC_MKBP_VOL_DOWN);
break;
case KEYBOARD_BUTTON_RECOVERY:
mkbp_button_state &= ~BIT(EC_MKBP_RECOVERY);
mkbp_button_state |= (is_pressed << EC_MKBP_RECOVERY);
break;
default:
/* ignored. */
return;
}
CPRINTS("buttons: %x", mkbp_button_state);
/* Add the new state to the FIFO. */
mkbp_fifo_add(EC_MKBP_EVENT_BUTTON,
(const uint8_t *)&mkbp_button_state);
}
#ifdef CONFIG_EMULATED_SYSRQ
void host_send_sysrq(uint8_t key)
{
uint32_t value = key;
mkbp_fifo_add(EC_MKBP_EVENT_SYSRQ, (const uint8_t *)&value);
}
#endif
#ifdef CONFIG_POWER_BUTTON
/**
* Handle power button changing state.
*/
static void keyboard_power_button(void)
{
keyboard_update_button(KEYBOARD_BUTTON_POWER,
power_button_is_pressed());
}
DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, keyboard_power_button,
HOOK_PRIO_DEFAULT);
#endif /* defined(CONFIG_POWER_BUTTON) */
static int get_next_event(uint8_t *out, enum ec_mkbp_event evt)
{
uint8_t t = fifo[fifo_start].event_type;
uint8_t size;
if (!fifo_entries)
return -1;
/*
* We need to peek at the next event to check that we were called with
* the correct event.
*/
if (t != (uint8_t)evt) {
/*
* We were called with the wrong event. The next element in the
* FIFO's event type doesn't match with what we were called
* with. Return an error that we're busy. The caller will need
* to call us with the correct event first.
*/
return -EC_ERROR_BUSY;
}
fifo_remove(out);
/* Keep sending events if FIFO is not empty */
if (fifo_entries)
mkbp_send_event(fifo[fifo_start].event_type);
/* Return the correct size of the data. */
size = get_data_size(t);
if (size)
return size;
else
return -EC_ERROR_UNKNOWN;
}
static int keyboard_get_next_event(uint8_t *out)
{
return get_next_event(out, EC_MKBP_EVENT_KEY_MATRIX);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_KEY_MATRIX, keyboard_get_next_event);
static int button_get_next_event(uint8_t *out)
{
return get_next_event(out, EC_MKBP_EVENT_BUTTON);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_BUTTON, button_get_next_event);
static int switch_get_next_event(uint8_t *out)
{
return get_next_event(out, EC_MKBP_EVENT_SWITCH);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_SWITCH, switch_get_next_event);
#ifdef CONFIG_EMULATED_SYSRQ
static int sysrq_get_next_event(uint8_t *out)
{
return get_next_event(out, EC_MKBP_EVENT_SYSRQ);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_SYSRQ, sysrq_get_next_event);
#endif
void keyboard_send_battery_key(void)
{
uint8_t state[KEYBOARD_COLS_MAX];
/* Copy debounced state and add battery pseudo-key */
memcpy(state, keyboard_scan_get_state(), sizeof(state));
state[BATTERY_KEY_COL] ^= BATTERY_KEY_ROW_MASK;
/* Add to FIFO only if AP is on or else it will wake from suspend */
if (chipset_in_state(CHIPSET_STATE_ON))
keyboard_fifo_add(state);
}
void clear_typematic_key(void)
{ }
/*****************************************************************************/
/* Host commands */
static uint32_t get_supported_buttons(void)
{
uint32_t val = 0;
#ifdef CONFIG_VOLUME_BUTTONS
val |= BIT(EC_MKBP_VOL_UP) | BIT(EC_MKBP_VOL_DOWN);
#endif /* defined(CONFIG_VOLUME_BUTTONS) */
#ifdef CONFIG_DEDICATED_RECOVERY_BUTTON
val |= BIT(EC_MKBP_RECOVERY);
#endif /* defined(CONFIG_DEDICATED_RECOVERY_BUTTON) */
#ifdef CONFIG_POWER_BUTTON
val |= BIT(EC_MKBP_POWER_BUTTON);
#endif /* defined(CONFIG_POWER_BUTTON) */
return val;
}
static uint32_t get_supported_switches(void)
{
uint32_t val = 0;
#ifdef CONFIG_LID_SWITCH
val |= BIT(EC_MKBP_LID_OPEN);
#endif
#ifdef CONFIG_TABLET_MODE_SWITCH
val |= BIT(EC_MKBP_TABLET_MODE);
#endif
#ifdef CONFIG_BASE_ATTACHED_SWITCH
val |= BIT(EC_MKBP_BASE_ATTACHED);
#endif
#ifdef CONFIG_FRONT_PROXIMITY_SWITCH
val |= BIT(EC_MKBP_FRONT_PROXIMITY);
#endif
return val;
}
static enum ec_status mkbp_get_info(struct host_cmd_handler_args *args)
{
const struct ec_params_mkbp_info *p = args->params;
if (args->params_size == 0 || p->info_type == EC_MKBP_INFO_KBD) {
struct ec_response_mkbp_info *r = args->response;
/* Version 0 just returns info about the keyboard. */
r->rows = KEYBOARD_ROWS;
r->cols = keyboard_cols;
/* This used to be "switches" which was previously 0. */
r->reserved = 0;
args->response_size = sizeof(struct ec_response_mkbp_info);
} else {
union ec_response_get_next_data *r = args->response;
/* Version 1 (other than EC_MKBP_INFO_KBD) */
switch (p->info_type) {
case EC_MKBP_INFO_SUPPORTED:
switch (p->event_type) {
case EC_MKBP_EVENT_BUTTON:
r->buttons = get_supported_buttons();
args->response_size = sizeof(r->buttons);
break;
case EC_MKBP_EVENT_SWITCH:
r->switches = get_supported_switches();
args->response_size = sizeof(r->switches);
break;
default:
/* Don't care for now for other types. */
return EC_RES_INVALID_PARAM;
}
break;
case EC_MKBP_INFO_CURRENT:
switch (p->event_type) {
#ifdef HAS_TASK_KEYSCAN
case EC_MKBP_EVENT_KEY_MATRIX:
memcpy(r->key_matrix, keyboard_scan_get_state(),
sizeof(r->key_matrix));
args->response_size = sizeof(r->key_matrix);
break;
#endif
case EC_MKBP_EVENT_HOST_EVENT:
r->host_event = (uint32_t)host_get_events();
args->response_size = sizeof(r->host_event);
break;
#ifdef CONFIG_HOST_EVENT64
case EC_MKBP_EVENT_HOST_EVENT64:
r->host_event64 = host_get_events();
args->response_size = sizeof(r->host_event64);
break;
#endif
case EC_MKBP_EVENT_BUTTON:
r->buttons = mkbp_button_state;
args->response_size = sizeof(r->buttons);
break;
case EC_MKBP_EVENT_SWITCH:
r->switches = mkbp_switch_state;
args->response_size = sizeof(r->switches);
break;
default:
/* Doesn't make sense for other event types. */
return EC_RES_INVALID_PARAM;
}
break;
default:
/* Unsupported query. */
return EC_RES_ERROR;
}
}
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_MKBP_INFO, mkbp_get_info,
EC_VER_MASK(0) | EC_VER_MASK(1));
#ifndef HAS_TASK_KEYSCAN
/* For boards without a keyscan task, try and simulate keyboard presses. */
static void simulate_key(int row, int col, int pressed)
{
if ((simulated_key[col] & BIT(row)) == ((pressed ? 1 : 0) << row))
return; /* No change */
simulated_key[col] &= ~BIT(row);
if (pressed)
simulated_key[col] |= BIT(row);
keyboard_fifo_add(simulated_key);
}
static int command_mkbp_keyboard_press(int argc, char **argv)
{
if (argc == 1) {
int i, j;
ccputs("Simulated keys:\n");
for (i = 0; i < keyboard_cols; ++i) {
if (simulated_key[i] == 0)
continue;
for (j = 0; j < KEYBOARD_ROWS; ++j)
if (simulated_key[i] & BIT(j))
ccprintf("\t%d %d\n", i, j);
}
} else if (argc == 3 || argc == 4) {
int r, c, p;
char *e;
c = strtoi(argv[1], &e, 0);
if (*e || c < 0 || c >= keyboard_cols)
return EC_ERROR_PARAM1;
r = strtoi(argv[2], &e, 0);
if (*e || r < 0 || r >= KEYBOARD_ROWS)
return EC_ERROR_PARAM2;
if (argc == 3) {
/* Simulate a press and release */
simulate_key(r, c, 1);
simulate_key(r, c, 0);
} else {
p = strtoi(argv[3], &e, 0);
if (*e || p < 0 || p > 1)
return EC_ERROR_PARAM3;
simulate_key(r, c, p);
}
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(kbpress, command_mkbp_keyboard_press,
"[col row [0 | 1]]",
"Simulate keypress");
#endif /* !defined(HAS_TASK_KEYSCAN) */
#ifdef HAS_TASK_KEYSCAN
static void set_keyscan_config(const struct ec_mkbp_config *src,
struct ec_mkbp_protocol_config *dst,
uint32_t valid_mask, uint8_t new_flags)
{
struct keyboard_scan_config *ksc = keyboard_scan_get_config();
if (valid_mask & EC_MKBP_VALID_SCAN_PERIOD)
ksc->scan_period_us = src->scan_period_us;
if (valid_mask & EC_MKBP_VALID_POLL_TIMEOUT)
ksc->poll_timeout_us = src->poll_timeout_us;
if (valid_mask & EC_MKBP_VALID_MIN_POST_SCAN_DELAY) {
/*
* Key scanning is high priority, so we should require at
* least 100us min delay here. Setting this to 0 will cause
* watchdog events. Use 200 to be safe.
*/
ksc->min_post_scan_delay_us =
MAX(src->min_post_scan_delay_us, 200);
}
if (valid_mask & EC_MKBP_VALID_OUTPUT_SETTLE)
ksc->output_settle_us = src->output_settle_us;
if (valid_mask & EC_MKBP_VALID_DEBOUNCE_DOWN)
ksc->debounce_down_us = src->debounce_down_us;
if (valid_mask & EC_MKBP_VALID_DEBOUNCE_UP)
ksc->debounce_up_us = src->debounce_up_us;
/*
* If we just enabled key scanning, kick the task so that it will
* fall out of the task_wait_event() in keyboard_scan_task().
*/
if ((new_flags & EC_MKBP_FLAGS_ENABLE) &&
!(dst->flags & EC_MKBP_FLAGS_ENABLE))
task_wake(TASK_ID_KEYSCAN);
}
static void get_keyscan_config(struct ec_mkbp_config *dst)
{
const struct keyboard_scan_config *ksc = keyboard_scan_get_config();
/* Copy fields from keyscan config to mkbp config */
dst->output_settle_us = ksc->output_settle_us;
dst->debounce_down_us = ksc->debounce_down_us;
dst->debounce_up_us = ksc->debounce_up_us;
dst->scan_period_us = ksc->scan_period_us;
dst->min_post_scan_delay_us = ksc->min_post_scan_delay_us;
dst->poll_timeout_us = ksc->poll_timeout_us;
}
/**
* Copy keyscan configuration from one place to another according to flags
*
* This is like a structure copy, except that only selected fields are
* copied.
*
* @param src Source config
* @param dst Destination config
* @param valid_mask Bits representing which fields to copy - each bit is
* from enum mkbp_config_valid
* @param valid_flags Bit mask controlling flags to copy. Any 1 bit means
* that the corresponding bit in src->flags is copied
* over to dst->flags
*/
static void keyscan_copy_config(const struct ec_mkbp_config *src,
struct ec_mkbp_protocol_config *dst,
uint32_t valid_mask, uint8_t valid_flags)
{
uint8_t new_flags;
if (valid_mask & EC_MKBP_VALID_FIFO_MAX_DEPTH) {
/* Validity check for fifo depth */
dst->fifo_max_depth = MIN(src->fifo_max_depth,
FIFO_DEPTH);
}
new_flags = dst->flags & ~valid_flags;
new_flags |= src->flags & valid_flags;
set_keyscan_config(src, dst, valid_mask, new_flags);
dst->flags = new_flags;
}
static enum ec_status
host_command_mkbp_set_config(struct host_cmd_handler_args *args)
{
const struct ec_params_mkbp_set_config *req = args->params;
keyscan_copy_config(&req->config, &config,
config.valid_mask & req->config.valid_mask,
config.valid_flags & req->config.valid_flags);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_MKBP_SET_CONFIG,
host_command_mkbp_set_config,
EC_VER_MASK(0));
static enum ec_status
host_command_mkbp_get_config(struct host_cmd_handler_args *args)
{
struct ec_response_mkbp_get_config *resp = args->response;
struct ec_mkbp_config *dst = &resp->config;
memcpy(&resp->config, &config, sizeof(config));
/* Copy fields from mkbp protocol config to mkbp config */
dst->valid_mask = config.valid_mask;
dst->flags = config.flags;
dst->valid_flags = config.valid_flags;
dst->fifo_max_depth = config.fifo_max_depth;
get_keyscan_config(dst);
args->response_size = sizeof(*resp);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_MKBP_GET_CONFIG,
host_command_mkbp_get_config,
EC_VER_MASK(0));
#endif /* HAS_TASK_KEYSCAN */
|