aboutsummaryrefslogtreecommitdiff
path: root/include/ec_commands.h
blob: 12811cc070e5859b892e7aad42abb7076cf4de98 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
/* Copyright (c) 2012 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.
 */

/* Host communication command constants for Chrome EC */

#ifndef __CROS_EC_COMMANDS_H
#define __CROS_EC_COMMANDS_H

/*
 * Protocol overview
 *
 * request:  CMD [ P0 P1 P2 ... Pn S ]
 * response: ERR [ P0 P1 P2 ... Pn S ]
 *
 * where the bytes are defined as follow :
 *      - CMD is the command code. (defined by EC_CMD_ constants)
 *      - ERR is the error code. (defined by EC_RES_ constants)
 *      - Px is the optional payload.
 *        it is not sent if the error code is not success.
 *        (defined by ec_params_ and ec_response_ structures)
 *      - S is the checksum which is the sum of all payload bytes.
 *
 * On LPC, CMD and ERR are sent/received at EC_LPC_ADDR_KERNEL|USER_CMD
 * and the payloads are sent/received at EC_LPC_ADDR_KERNEL|USER_PARAM.
 * On I2C, all bytes are sent serially in the same message.
 */

/* Current version of this protocol */
#define EC_PROTO_VERSION          0x00000002

/* Command version mask */
#define EC_VER_MASK(version) (1UL << (version))

/* I/O addresses for ACPI commands */
#define EC_LPC_ADDR_ACPI_DATA  0x62
#define EC_LPC_ADDR_ACPI_CMD   0x66

/* I/O addresses for host command */
#define EC_LPC_ADDR_HOST_DATA  0x200
#define EC_LPC_ADDR_HOST_CMD   0x204

/* I/O addresses for host command args and params */
#define EC_LPC_ADDR_HOST_ARGS  0x800
#define EC_LPC_ADDR_HOST_PARAM 0x804
#define EC_HOST_PARAM_SIZE     0x0fc  /* Size of param area in bytes */

/* I/O addresses for host command params, old interface */
#define EC_LPC_ADDR_OLD_PARAM  0x880
#define EC_OLD_PARAM_SIZE      0x080  /* Size of param area in bytes */

/* EC command register bit functions */
#define EC_LPC_CMDR_DATA	(1 << 0)  /* Data ready for host to read */
#define EC_LPC_CMDR_PENDING	(1 << 1)  /* Write pending to EC */
#define EC_LPC_CMDR_BUSY	(1 << 2)  /* EC is busy processing a command */
#define EC_LPC_CMDR_CMD		(1 << 3)  /* Last host write was a command */
#define EC_LPC_CMDR_ACPI_BRST	(1 << 4)  /* Burst mode (not used) */
#define EC_LPC_CMDR_SCI		(1 << 5)  /* SCI event is pending */
#define EC_LPC_CMDR_SMI		(1 << 6)  /* SMI event is pending */

#define EC_LPC_ADDR_MEMMAP       0x900
#define EC_MEMMAP_SIZE         255 /* ACPI IO buffer max is 255 bytes */
#define EC_MEMMAP_TEXT_MAX     8   /* Size of a string in the memory map */

/* The offset address of each type of data in mapped memory. */
#define EC_MEMMAP_TEMP_SENSOR      0x00 /* Temp sensors */
#define EC_MEMMAP_FAN              0x10 /* Fan speeds */
#define EC_MEMMAP_TEMP_SENSOR_B    0x18 /* Temp sensors (second set) */
#define EC_MEMMAP_ID               0x20 /* 'E' 'C' */
#define EC_MEMMAP_ID_VERSION       0x22 /* Version of data in 0x20 - 0x2f */
#define EC_MEMMAP_THERMAL_VERSION  0x23 /* Version of data in 0x00 - 0x1f */
#define EC_MEMMAP_BATTERY_VERSION  0x24 /* Version of data in 0x40 - 0x7f */
#define EC_MEMMAP_SWITCHES_VERSION 0x25 /* Version of data in 0x30 - 0x33 */
#define EC_MEMMAP_EVENTS_VERSION   0x26 /* Version of data in 0x34 - 0x3f */
#define EC_MEMMAP_HOST_CMD_FLAGS   0x27 /* Host command interface flags */
#define EC_MEMMAP_SWITCHES         0x30
#define EC_MEMMAP_HOST_EVENTS      0x34
#define EC_MEMMAP_BATT_VOLT        0x40 /* Battery Present Voltage */
#define EC_MEMMAP_BATT_RATE        0x44 /* Battery Present Rate */
#define EC_MEMMAP_BATT_CAP         0x48 /* Battery Remaining Capacity */
#define EC_MEMMAP_BATT_FLAG        0x4c /* Battery State, defined below */
#define EC_MEMMAP_BATT_DCAP        0x50 /* Battery Design Capacity */
#define EC_MEMMAP_BATT_DVLT        0x54 /* Battery Design Voltage */
#define EC_MEMMAP_BATT_LFCC        0x58 /* Battery Last Full Charge Capacity */
#define EC_MEMMAP_BATT_CCNT        0x5c /* Battery Cycle Count */
#define EC_MEMMAP_BATT_MFGR        0x60 /* Battery Manufacturer String */
#define EC_MEMMAP_BATT_MODEL       0x68 /* Battery Model Number String */
#define EC_MEMMAP_BATT_SERIAL      0x70 /* Battery Serial Number String */
#define EC_MEMMAP_BATT_TYPE        0x78 /* Battery Type String */

/* Number of temp sensors at EC_MEMMAP_TEMP_SENSOR */
#define EC_TEMP_SENSOR_ENTRIES     16
/*
 * Number of temp sensors at EC_MEMMAP_TEMP_SENSOR_B.
 *
 * Valid only if EC_MEMMAP_THERMAL_VERSION returns >= 2.
 */
#define EC_TEMP_SENSOR_B_ENTRIES      8
#define EC_TEMP_SENSOR_NOT_PRESENT    0xff
#define EC_TEMP_SENSOR_ERROR          0xfe
#define EC_TEMP_SENSOR_NOT_POWERED    0xfd
#define EC_TEMP_SENSOR_NOT_CALIBRATED 0xfc
/*
 * The offset of temperature value stored in mapped memory.  This allows
 * reporting a temperature range of 200K to 454K = -73C to 181C.
 */
#define EC_TEMP_SENSOR_OFFSET      200

#define EC_FAN_SPEED_ENTRIES       4       /* Number of fans at EC_MEMMAP_FAN */
#define EC_FAN_SPEED_NOT_PRESENT   0xffff  /* Entry not present */
#define EC_FAN_SPEED_STALLED       0xfffe  /* Fan stalled */

/* Battery bit flags at EC_MEMMAP_BATT_FLAG. */
#define EC_BATT_FLAG_AC_PRESENT   0x01
#define EC_BATT_FLAG_BATT_PRESENT 0x02
#define EC_BATT_FLAG_DISCHARGING  0x04
#define EC_BATT_FLAG_CHARGING     0x08
#define EC_BATT_FLAG_LEVEL_CRITICAL 0x10

/* Switch flags at EC_MEMMAP_SWITCHES */
#define EC_SWITCH_LID_OPEN               0x01
#define EC_SWITCH_POWER_BUTTON_PRESSED   0x02
#define EC_SWITCH_WRITE_PROTECT_DISABLED 0x04
/* Recovery requested via keyboard */
#define EC_SWITCH_KEYBOARD_RECOVERY      0x08
/* Recovery requested via dedicated signal (from servo board) */
#define EC_SWITCH_DEDICATED_RECOVERY     0x10
/* Was fake developer mode switch; now unused.  Remove in next refactor. */
#define EC_SWITCH_IGNORE0                0x20

/* Host command interface flags */
/* Host command interface supports LPC args (LPC interface only) */
#define EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED  0x01

/* Wireless switch flags */
#define EC_WIRELESS_SWITCH_WLAN      0x01
#define EC_WIRELESS_SWITCH_BLUETOOTH 0x02

/*
 * This header file is used in coreboot both in C and ACPI code.  The ACPI code
 * is pre-processed to handle constants but the ASL compiler is unable to
 * handle actual C code so keep it separate.
 */
#ifndef __ACPI__

/*
 * Define __packed if someone hasn't beat us to it.  Linux kernel style
 * checking prefers __packed over __attribute__((packed)).
 */
#ifndef __packed
#define __packed __attribute__((packed))
#endif

/* LPC command status byte masks */
/* EC has written a byte in the data register and host hasn't read it yet */
#define EC_LPC_STATUS_TO_HOST     0x01
/* Host has written a command/data byte and the EC hasn't read it yet */
#define EC_LPC_STATUS_FROM_HOST   0x02
/* EC is processing a command */
#define EC_LPC_STATUS_PROCESSING  0x04
/* Last write to EC was a command, not data */
#define EC_LPC_STATUS_LAST_CMD    0x08
/* EC is in burst mode.  Unsupported by Chrome EC, so this bit is never set */
#define EC_LPC_STATUS_BURST_MODE  0x10
/* SCI event is pending (requesting SCI query) */
#define EC_LPC_STATUS_SCI_PENDING 0x20
/* SMI event is pending (requesting SMI query) */
#define EC_LPC_STATUS_SMI_PENDING 0x40
/* (reserved) */
#define EC_LPC_STATUS_RESERVED    0x80

/*
 * EC is busy.  This covers both the EC processing a command, and the host has
 * written a new command but the EC hasn't picked it up yet.
 */
#define EC_LPC_STATUS_BUSY_MASK \
	(EC_LPC_STATUS_FROM_HOST | EC_LPC_STATUS_PROCESSING)

/* Host command response codes */
enum ec_status {
	EC_RES_SUCCESS = 0,
	EC_RES_INVALID_COMMAND = 1,
	EC_RES_ERROR = 2,
	EC_RES_INVALID_PARAM = 3,
	EC_RES_ACCESS_DENIED = 4,
	EC_RES_INVALID_RESPONSE = 5,
	EC_RES_INVALID_VERSION = 6,
	EC_RES_INVALID_CHECKSUM = 7,
	EC_RES_IN_PROGRESS = 8,		/* Accepted, command in progress */
	EC_RES_UNAVAILABLE = 9,		/* No response available */
	EC_RES_TIMEOUT = 10,		/* We got a timeout */
	EC_RES_OVERFLOW = 11,		/* Table / data overflow */
};

/*
 * Host event codes.  Note these are 1-based, not 0-based, because ACPI query
 * EC command uses code 0 to mean "no event pending".  We explicitly specify
 * each value in the enum listing so they won't change if we delete/insert an
 * item or rearrange the list (it needs to be stable across platforms, not
 * just within a single compiled instance).
 */
enum host_event_code {
	EC_HOST_EVENT_LID_CLOSED = 1,
	EC_HOST_EVENT_LID_OPEN = 2,
	EC_HOST_EVENT_POWER_BUTTON = 3,
	EC_HOST_EVENT_AC_CONNECTED = 4,
	EC_HOST_EVENT_AC_DISCONNECTED = 5,
	EC_HOST_EVENT_BATTERY_LOW = 6,
	EC_HOST_EVENT_BATTERY_CRITICAL = 7,
	EC_HOST_EVENT_BATTERY = 8,
	EC_HOST_EVENT_THERMAL_THRESHOLD = 9,
	EC_HOST_EVENT_THERMAL_OVERLOAD = 10,
	EC_HOST_EVENT_THERMAL = 11,
	EC_HOST_EVENT_USB_CHARGER = 12,
	EC_HOST_EVENT_KEY_PRESSED = 13,
	/*
	 * EC has finished initializing the host interface.  The host can check
	 * for this event following sending a EC_CMD_REBOOT_EC command to
	 * determine when the EC is ready to accept subsequent commands.
	 */
	EC_HOST_EVENT_INTERFACE_READY = 14,
	/* Keyboard recovery combo has been pressed */
	EC_HOST_EVENT_KEYBOARD_RECOVERY = 15,

	/* Shutdown due to thermal overload */
	EC_HOST_EVENT_THERMAL_SHUTDOWN = 16,
	/* Shutdown due to battery level too low */
	EC_HOST_EVENT_BATTERY_SHUTDOWN = 17,

	/*
	 * The high bit of the event mask is not used as a host event code.  If
	 * it reads back as set, then the entire event mask should be
	 * considered invalid by the host.  This can happen when reading the
	 * raw event status via EC_MEMMAP_HOST_EVENTS but the LPC interface is
	 * not initialized on the EC, or improperly configured on the host.
	 */
	EC_HOST_EVENT_INVALID = 32
};
/* Host event mask */
#define EC_HOST_EVENT_MASK(event_code) (1UL << ((event_code) - 1))

/* Arguments at EC_LPC_ADDR_HOST_ARGS */
struct ec_lpc_host_args {
	uint8_t flags;
	uint8_t command_version;
	uint8_t data_size;
	/*
	 * Checksum; sum of command + flags + command_version + data_size +
	 * all params/response data bytes.
	 */
	uint8_t checksum;
} __packed;

/* Flags for ec_lpc_host_args.flags */
/*
 * Args are from host.  Data area at EC_LPC_ADDR_HOST_PARAM contains command
 * params.
 *
 * If EC gets a command and this flag is not set, this is an old-style command.
 * Command version is 0 and params from host are at EC_LPC_ADDR_OLD_PARAM with
 * unknown length.  EC must respond with an old-style response (that is,
 * withouth setting EC_HOST_ARGS_FLAG_TO_HOST).
 */
#define EC_HOST_ARGS_FLAG_FROM_HOST 0x01
/*
 * Args are from EC.  Data area at EC_LPC_ADDR_HOST_PARAM contains response.
 *
 * If EC responds to a command and this flag is not set, this is an old-style
 * response.  Command version is 0 and response data from EC is at
 * EC_LPC_ADDR_OLD_PARAM with unknown length.
 */
#define EC_HOST_ARGS_FLAG_TO_HOST   0x02

/*
 * Notes on commands:
 *
 * Each command is an 8-byte command value.  Commands which take params or
 * return response data specify structs for that data.  If no struct is
 * specified, the command does not input or output data, respectively.
 * Parameter/response length is implicit in the structs.  Some underlying
 * communication protocols (I2C, SPI) may add length or checksum headers, but
 * those are implementation-dependent and not defined here.
 */

/*****************************************************************************/
/* General / test commands */

/*
 * Get protocol version, used to deal with non-backward compatible protocol
 * changes.
 */
#define EC_CMD_PROTO_VERSION 0x00

struct ec_response_proto_version {
	uint32_t version;
} __packed;

/*
 * Hello.  This is a simple command to test the EC is responsive to
 * commands.
 */
#define EC_CMD_HELLO 0x01

struct ec_params_hello {
	uint32_t in_data;  /* Pass anything here */
} __packed;

struct ec_response_hello {
	uint32_t out_data;  /* Output will be in_data + 0x01020304 */
} __packed;

/* Get version number */
#define EC_CMD_GET_VERSION 0x02

enum ec_current_image {
	EC_IMAGE_UNKNOWN = 0,
	EC_IMAGE_RO,
	EC_IMAGE_RW
};

struct ec_response_get_version {
	/* Null-terminated version strings for RO, RW */
	char version_string_ro[32];
	char version_string_rw[32];
	char reserved[32];       /* Was previously RW-B string */
	uint32_t current_image;  /* One of ec_current_image */
} __packed;

/* Read test */
#define EC_CMD_READ_TEST 0x03

struct ec_params_read_test {
	uint32_t offset;   /* Starting value for read buffer */
	uint32_t size;     /* Size to read in bytes */
} __packed;

struct ec_response_read_test {
	uint32_t data[32];
} __packed;

/*
 * Get build information
 *
 * Response is null-terminated string.
 */
#define EC_CMD_GET_BUILD_INFO 0x04

/* Get chip info */
#define EC_CMD_GET_CHIP_INFO 0x05

struct ec_response_get_chip_info {
	/* Null-terminated strings */
	char vendor[32];
	char name[32];
	char revision[32];  /* Mask version */
} __packed;

/* Get board HW version */
#define EC_CMD_GET_BOARD_VERSION 0x06

struct ec_response_board_version {
	uint16_t board_version;  /* A monotonously incrementing number. */
} __packed;

/*
 * Read memory-mapped data.
 *
 * This is an alternate interface to memory-mapped data for bus protocols
 * which don't support direct-mapped memory - I2C, SPI, etc.
 *
 * Response is params.size bytes of data.
 */
#define EC_CMD_READ_MEMMAP 0x07

struct ec_params_read_memmap {
	uint8_t offset;   /* Offset in memmap (EC_MEMMAP_*) */
	uint8_t size;     /* Size to read in bytes */
} __packed;

/* Read versions supported for a command */
#define EC_CMD_GET_CMD_VERSIONS 0x08

struct ec_params_get_cmd_versions {
	uint8_t cmd;      /* Command to check */
} __packed;

struct ec_response_get_cmd_versions {
	/*
	 * Mask of supported versions; use EC_VER_MASK() to compare with a
	 * desired version.
	 */
	uint32_t version_mask;
} __packed;

/*
 * Check EC communcations status (busy). This is needed on i2c/spi but not
 * on lpc since it has its own out-of-band busy indicator.
 *
 * lpc must read the status from the command register. Attempting this on
 * lpc will overwrite the args/parameter space and corrupt its data.
 */
#define EC_CMD_GET_COMMS_STATUS		0x09

/* Avoid using ec_status which is for return values */
enum ec_comms_status {
	EC_COMMS_STATUS_PROCESSING	= 1 << 0,	/* Processing cmd */
};

struct ec_response_get_comms_status {
	uint32_t flags;		/* Mask of enum ec_comms_status */
} __packed;


/*****************************************************************************/
/* Flash commands */

/* Get flash info */
#define EC_CMD_FLASH_INFO 0x10

struct ec_response_flash_info {
	/* Usable flash size, in bytes */
	uint32_t flash_size;
	/*
	 * Write block size.  Write offset and size must be a multiple
	 * of this.
	 */
	uint32_t write_block_size;
	/*
	 * Erase block size.  Erase offset and size must be a multiple
	 * of this.
	 */
	uint32_t erase_block_size;
	/*
	 * Protection block size.  Protection offset and size must be a
	 * multiple of this.
	 */
	uint32_t protect_block_size;
} __packed;

/*
 * Read flash
 *
 * Response is params.size bytes of data.
 */
#define EC_CMD_FLASH_READ 0x11

struct ec_params_flash_read {
	uint32_t offset;   /* Byte offset to read */
	uint32_t size;     /* Size to read in bytes */
} __packed;

/* Write flash */
#define EC_CMD_FLASH_WRITE 0x12

struct ec_params_flash_write {
	uint32_t offset;   /* Byte offset to write */
	uint32_t size;     /* Size to write in bytes */
	/*
	 * Data to write.  Could really use EC_PARAM_SIZE - 8, but tidiest to
	 * use a power of 2 so writes stay aligned.
	 */
	uint8_t data[64];
} __packed;

/* Erase flash */
#define EC_CMD_FLASH_ERASE 0x13

struct ec_params_flash_erase {
	uint32_t offset;   /* Byte offset to erase */
	uint32_t size;     /* Size to erase in bytes */
} __packed;

/*
 * Get/set flash protection.
 *
 * If mask!=0, sets/clear the requested bits of flags.  Depending on the
 * firmware write protect GPIO, not all flags will take effect immediately;
 * some flags require a subsequent hard reset to take effect.  Check the
 * returned flags bits to see what actually happened.
 *
 * If mask=0, simply returns the current flags state.
 */
#define EC_CMD_FLASH_PROTECT 0x15
#define EC_VER_FLASH_PROTECT 1  /* Command version 1 */

/* Flags for flash protection */
/* RO flash code protected when the EC boots */
#define EC_FLASH_PROTECT_RO_AT_BOOT         (1 << 0)
/*
 * RO flash code protected now.  If this bit is set, at-boot status cannot
 * be changed.
 */
#define EC_FLASH_PROTECT_RO_NOW             (1 << 1)
/* Entire flash code protected now, until reboot. */
#define EC_FLASH_PROTECT_ALL_NOW            (1 << 2)
/* Flash write protect GPIO is asserted now */
#define EC_FLASH_PROTECT_GPIO_ASSERTED      (1 << 3)
/* Error - at least one bank of flash is stuck locked, and cannot be unlocked */
#define EC_FLASH_PROTECT_ERROR_STUCK        (1 << 4)
/*
 * Error - flash protection is in inconsistent state.  At least one bank of
 * flash which should be protected is not protected.  Usually fixed by
 * re-requesting the desired flags, or by a hard reset if that fails.
 */
#define EC_FLASH_PROTECT_ERROR_INCONSISTENT (1 << 5)
/* Entile flash code protected when the EC boots */
#define EC_FLASH_PROTECT_ALL_AT_BOOT        (1 << 6)

struct ec_params_flash_protect {
	uint32_t mask;   /* Bits in flags to apply */
	uint32_t flags;  /* New flags to apply */
} __packed;

struct ec_response_flash_protect {
	/* Current value of flash protect flags */
	uint32_t flags;
	/*
	 * Flags which are valid on this platform.  This allows the caller
	 * to distinguish between flags which aren't set vs. flags which can't
	 * be set on this platform.
	 */
	uint32_t valid_flags;
	/* Flags which can be changed given the current protection state */
	uint32_t writable_flags;
} __packed;

/*
 * Note: commands 0x14 - 0x19 version 0 were old commands to get/set flash
 * write protect.  These commands may be reused with version > 0.
 */

/* Get the region offset/size */
#define EC_CMD_FLASH_REGION_INFO 0x16
#define EC_VER_FLASH_REGION_INFO 1

enum ec_flash_region {
	/* Region which holds read-only EC image */
	EC_FLASH_REGION_RO,
	/* Region which holds rewritable EC image */
	EC_FLASH_REGION_RW,
	/*
	 * Region which should be write-protected in the factory (a superset of
	 * EC_FLASH_REGION_RO)
	 */
	EC_FLASH_REGION_WP_RO,
};

struct ec_params_flash_region_info {
	uint32_t region;  /* enum ec_flash_region */
} __packed;

struct ec_response_flash_region_info {
	uint32_t offset;
	uint32_t size;
} __packed;

/* Read/write VbNvContext */
#define EC_CMD_VBNV_CONTEXT 0x17
#define EC_VER_VBNV_CONTEXT 1
#define EC_VBNV_BLOCK_SIZE 16

enum ec_vbnvcontext_op {
	EC_VBNV_CONTEXT_OP_READ,
	EC_VBNV_CONTEXT_OP_WRITE,
};

struct ec_params_vbnvcontext {
	uint32_t op;
	uint8_t block[EC_VBNV_BLOCK_SIZE];
} __packed;

struct ec_response_vbnvcontext {
	uint8_t block[EC_VBNV_BLOCK_SIZE];
} __packed;

/*****************************************************************************/
/* PWM commands */

/* Get fan target RPM */
#define EC_CMD_PWM_GET_FAN_TARGET_RPM 0x20

struct ec_response_pwm_get_fan_rpm {
	uint32_t rpm;
} __packed;

/* Set target fan RPM */
#define EC_CMD_PWM_SET_FAN_TARGET_RPM 0x21

struct ec_params_pwm_set_fan_target_rpm {
	uint32_t rpm;
} __packed;

/* Get keyboard backlight */
#define EC_CMD_PWM_GET_KEYBOARD_BACKLIGHT 0x22

struct ec_response_pwm_get_keyboard_backlight {
	uint8_t percent;
	uint8_t enabled;
} __packed;

/* Set keyboard backlight */
#define EC_CMD_PWM_SET_KEYBOARD_BACKLIGHT 0x23

struct ec_params_pwm_set_keyboard_backlight {
	uint8_t percent;
} __packed;

/* Set target fan PWM duty cycle */
#define EC_CMD_PWM_SET_FAN_DUTY 0x24

struct ec_params_pwm_set_fan_duty {
	uint32_t percent;
} __packed;

/*****************************************************************************/
/*
 * Lightbar commands. This looks worse than it is. Since we only use one HOST
 * command to say "talk to the lightbar", we put the "and tell it to do X" part
 * into a subcommand. We'll make separate structs for subcommands with
 * different input args, so that we know how much to expect.
 */
#define EC_CMD_LIGHTBAR_CMD 0x28

struct rgb_s {
	uint8_t r, g, b;
};

#define LB_BATTERY_LEVELS 4
/* List of tweakable parameters. NOTE: It's __packed so it can be sent in a
 * host command, but the alignment is the same regardless. Keep it that way.
 */
struct lightbar_params {
	/* Timing */
	int google_ramp_up;
	int google_ramp_down;
	int s3s0_ramp_up;
	int s0_tick_delay[2];			/* AC=0/1 */
	int s0a_tick_delay[2];			/* AC=0/1 */
	int s0s3_ramp_down;
	int s3_sleep_for;
	int s3_ramp_up;
	int s3_ramp_down;

	/* Oscillation */
	uint8_t new_s0;
	uint8_t osc_min[2];			/* AC=0/1 */
	uint8_t osc_max[2];			/* AC=0/1 */
	uint8_t w_ofs[2];			/* AC=0/1 */

	/* Brightness limits based on the backlight and AC. */
	uint8_t bright_bl_off_fixed[2];		/* AC=0/1 */
	uint8_t bright_bl_on_min[2];		/* AC=0/1 */
	uint8_t bright_bl_on_max[2];		/* AC=0/1 */

	/* Battery level thresholds */
	uint8_t battery_threshold[LB_BATTERY_LEVELS - 1];

	/* Map [AC][battery_level] to color index */
	uint8_t s0_idx[2][LB_BATTERY_LEVELS];	/* AP is running */
	uint8_t s3_idx[2][LB_BATTERY_LEVELS];	/* AP is sleeping */

	/* Color palette */
	struct rgb_s color[8];			/* 0-3 are Google colors */
} __packed;

struct ec_params_lightbar {
	uint8_t cmd;		      /* Command (see enum lightbar_command) */
	union {
		struct {
			/* no args */
		} dump, off, on, init, get_seq, get_params;

		struct num {
			uint8_t num;
		} brightness, seq, demo;

		struct reg {
			uint8_t ctrl, reg, value;
		} reg;

		struct rgb {
			uint8_t led, red, green, blue;
		} rgb;

		struct lightbar_params set_params;
	};
} __packed;

struct ec_response_lightbar {
	union {
		struct dump {
			struct {
				uint8_t reg;
				uint8_t ic0;
				uint8_t ic1;
			} vals[23];
		} dump;

		struct get_seq {
			uint8_t num;
		} get_seq;

		struct lightbar_params get_params;

		struct {
			/* no return params */
		} off, on, init, brightness, seq, reg, rgb, demo, set_params;
	};
} __packed;

/* Lightbar commands */
enum lightbar_command {
	LIGHTBAR_CMD_DUMP = 0,
	LIGHTBAR_CMD_OFF = 1,
	LIGHTBAR_CMD_ON = 2,
	LIGHTBAR_CMD_INIT = 3,
	LIGHTBAR_CMD_BRIGHTNESS = 4,
	LIGHTBAR_CMD_SEQ = 5,
	LIGHTBAR_CMD_REG = 6,
	LIGHTBAR_CMD_RGB = 7,
	LIGHTBAR_CMD_GET_SEQ = 8,
	LIGHTBAR_CMD_DEMO = 9,
	LIGHTBAR_CMD_GET_PARAMS = 10,
	LIGHTBAR_CMD_SET_PARAMS = 11,
	LIGHTBAR_NUM_CMDS
};

/*****************************************************************************/
/* Verified boot commands */

/*
 * Note: command code 0x29 version 0 was VBOOT_CMD in Link EVT; it may be
 * reused for other purposes with version > 0.
 */

/* Verified boot hash command */
#define EC_CMD_VBOOT_HASH 0x2A

struct ec_params_vboot_hash {
	uint8_t cmd;             /* enum ec_vboot_hash_cmd */
	uint8_t hash_type;       /* enum ec_vboot_hash_type */
	uint8_t nonce_size;      /* Nonce size; may be 0 */
	uint8_t reserved0;       /* Reserved; set 0 */
	uint32_t offset;         /* Offset in flash to hash */
	uint32_t size;           /* Number of bytes to hash */
	uint8_t nonce_data[64];  /* Nonce data; ignored if nonce_size=0 */
} __packed;

struct ec_response_vboot_hash {
	uint8_t status;          /* enum ec_vboot_hash_status */
	uint8_t hash_type;       /* enum ec_vboot_hash_type */
	uint8_t digest_size;     /* Size of hash digest in bytes */
	uint8_t reserved0;       /* Ignore; will be 0 */
	uint32_t offset;         /* Offset in flash which was hashed */
	uint32_t size;           /* Number of bytes hashed */
	uint8_t hash_digest[64]; /* Hash digest data */
} __packed;

enum ec_vboot_hash_cmd {
	EC_VBOOT_HASH_GET = 0,       /* Get current hash status */
	EC_VBOOT_HASH_ABORT = 1,     /* Abort calculating current hash */
	EC_VBOOT_HASH_START = 2,     /* Start computing a new hash */
	EC_VBOOT_HASH_RECALC = 3,    /* Synchronously compute a new hash */
};

enum ec_vboot_hash_type {
	EC_VBOOT_HASH_TYPE_SHA256 = 0, /* SHA-256 */
};

enum ec_vboot_hash_status {
	EC_VBOOT_HASH_STATUS_NONE = 0, /* No hash (not started, or aborted) */
	EC_VBOOT_HASH_STATUS_DONE = 1, /* Finished computing a hash */
	EC_VBOOT_HASH_STATUS_BUSY = 2, /* Busy computing a hash */
};

/*
 * Special values for offset for EC_VBOOT_HASH_START and EC_VBOOT_HASH_RECALC.
 * If one of these is specified, the EC will automatically update offset and
 * size to the correct values for the specified image (RO or RW).
 */
#define EC_VBOOT_HASH_OFFSET_RO 0xfffffffe
#define EC_VBOOT_HASH_OFFSET_RW 0xfffffffd

/*****************************************************************************/
/* USB charging control commands */

/* Set USB port charging mode */
#define EC_CMD_USB_CHARGE_SET_MODE 0x30

struct ec_params_usb_charge_set_mode {
	uint8_t usb_port_id;
	uint8_t mode;
} __packed;

/*****************************************************************************/
/* Persistent storage for host */

/* Maximum bytes that can be read/written in a single command */
#define EC_PSTORE_SIZE_MAX 64

/* Get persistent storage info */
#define EC_CMD_PSTORE_INFO 0x40

struct ec_response_pstore_info {
	/* Persistent storage size, in bytes */
	uint32_t pstore_size;
	/* Access size; read/write offset and size must be a multiple of this */
	uint32_t access_size;
} __packed;

/*
 * Read persistent storage
 *
 * Response is params.size bytes of data.
 */
#define EC_CMD_PSTORE_READ 0x41

struct ec_params_pstore_read {
	uint32_t offset;   /* Byte offset to read */
	uint32_t size;     /* Size to read in bytes */
} __packed;

/* Write persistent storage */
#define EC_CMD_PSTORE_WRITE 0x42

struct ec_params_pstore_write {
	uint32_t offset;   /* Byte offset to write */
	uint32_t size;     /* Size to write in bytes */
	uint8_t data[EC_PSTORE_SIZE_MAX];
} __packed;

/*****************************************************************************/
/* Real-time clock */

/* RTC params and response structures */
struct ec_params_rtc {
	uint32_t time;
} __packed;

struct ec_response_rtc {
	uint32_t time;
} __packed;

/* These use ec_response_rtc */
#define EC_CMD_RTC_GET_VALUE 0x44
#define EC_CMD_RTC_GET_ALARM 0x45

/* These all use ec_params_rtc */
#define EC_CMD_RTC_SET_VALUE 0x46
#define EC_CMD_RTC_SET_ALARM 0x47

/*****************************************************************************/
/* Port80 log access */

/* Get last port80 code from previous boot */
#define EC_CMD_PORT80_LAST_BOOT 0x48

struct ec_response_port80_last_boot {
	uint16_t code;
} __packed;

/*****************************************************************************/
/* Thermal engine commands */

/* Set thershold value */
#define EC_CMD_THERMAL_SET_THRESHOLD 0x50

struct ec_params_thermal_set_threshold {
	uint8_t sensor_type;
	uint8_t threshold_id;
	uint16_t value;
} __packed;

/* Get threshold value */
#define EC_CMD_THERMAL_GET_THRESHOLD 0x51

struct ec_params_thermal_get_threshold {
	uint8_t sensor_type;
	uint8_t threshold_id;
} __packed;

struct ec_response_thermal_get_threshold {
	uint16_t value;
} __packed;

/* Toggle automatic fan control */
#define EC_CMD_THERMAL_AUTO_FAN_CTRL 0x52

/* Get TMP006 calibration data */
#define EC_CMD_TMP006_GET_CALIBRATION 0x53

struct ec_params_tmp006_get_calibration {
	uint8_t index;
} __packed;

struct ec_response_tmp006_get_calibration {
	float s0;
	float b0;
	float b1;
	float b2;
} __packed;

/* Set TMP006 calibration data */
#define EC_CMD_TMP006_SET_CALIBRATION 0x54

struct ec_params_tmp006_set_calibration {
	uint8_t index;
	uint8_t reserved[3];  /* Reserved; set 0 */
	float s0;
	float b0;
	float b1;
	float b2;
} __packed;

/*****************************************************************************/
/* CROS_EC - Matrix KeyBoard Protocol */

/*
 * Read key state
 *
 * Returns raw data for keyboard cols; see ec_response_cros_ec_info.cols for
 * expected response size.
 */
#define EC_CMD_CROS_EC_STATE 0x60

/* Provide information about the matrix : number of rows and columns */
#define EC_CMD_CROS_EC_INFO 0x61

struct ec_response_cros_ec_info {
	uint32_t rows;
	uint32_t cols;
	uint8_t switches;
} __packed;

/* Simulate key press */
#define EC_CMD_CROS_EC_SIMULATE_KEY 0x62

struct ec_params_cros_ec_simulate_key {
	uint8_t col;
	uint8_t row;
	uint8_t pressed;
} __packed;

/* Configure keyboard scanning */
#define EC_CMD_CROS_EC_SET_CONFIG 0x64
#define EC_CMD_CROS_EC_GET_CONFIG 0x65

/* flags */
enum cros_ec_config_flags {
	EC_CROS_EC_FLAGS_ENABLE = 1,	/* Enable keyboard scanning */
};

enum cros_ec_config_valid {
	EC_CROS_EC_VALID_SCAN_PERIOD		= 1 << 0,
	EC_CROS_EC_VALID_POLL_TIMEOUT		= 1 << 1,
	EC_CROS_EC_VALID_MIN_POST_SCAN_DELAY	= 1 << 3,
	EC_CROS_EC_VALID_OUTPUT_SETTLE		= 1 << 4,
	EC_CROS_EC_VALID_DEBOUNCE_DOWN		= 1 << 5,
	EC_CROS_EC_VALID_DEBOUNCE_UP		= 1 << 6,
	EC_CROS_EC_VALID_FIFO_MAX_DEPTH		= 1 << 7,
};

/* Configuration for our key scanning algorithm */
struct ec_cros_ec_config {
	uint32_t valid_mask;		/* valid fields */
	uint8_t flags;		/* some flags (enum cros_ec_config_flags) */
	uint8_t valid_flags;		/* which flags are valid */
	uint16_t scan_period_us;	/* period between start of scans */
	/* revert to interrupt mode after no activity for this long */
	uint32_t poll_timeout_us;
	/*
	 * minimum post-scan relax time. Once we finish a scan we check
	 * the time until we are due to start the next one. If this time is
	 * shorter this field, we use this instead.
	 */
	uint16_t min_post_scan_delay_us;
	/* delay between setting up output and waiting for it to settle */
	uint16_t output_settle_us;
	uint16_t debounce_down_us;	/* time for debounce on key down */
	uint16_t debounce_up_us;	/* time for debounce on key up */
	/* maximum depth to allow for fifo (0 = no keyscan output) */
	uint8_t fifo_max_depth;
} __packed;

struct ec_params_cros_ec_set_config {
	struct ec_cros_ec_config config;
} __packed;

struct ec_response_cros_ec_get_config {
	struct ec_cros_ec_config config;
} __packed;

/* Run the key scan emulation */
#define EC_CMD_KEYSCAN_SEQ_CTRL 0x66

enum ec_keyscan_seq_cmd {
	EC_KEYSCAN_SEQ_STATUS = 0,	/* Get status information */
	EC_KEYSCAN_SEQ_CLEAR = 1,	/* Clear sequence */
	EC_KEYSCAN_SEQ_ADD = 2,		/* Add item to sequence */
	EC_KEYSCAN_SEQ_START = 3,	/* Start running sequence */
	EC_KEYSCAN_SEQ_COLLECT = 4,	/* Collect sequence summary data */
};

enum ec_collect_flags {
	/*
	 * Indicates this scan was processed by the EC. Due to timing, some
	 * scans may be skipped.
	 */
	EC_KEYSCAN_SEQ_FLAG_DONE	= 1 << 0,
};

struct ec_collect_item {
	uint8_t flags;		/* some flags (enum ec_collect_flags) */
};

struct ec_params_keyscan_seq_ctrl {
	uint8_t cmd;	/* Command to send (enum ec_keyscan_seq_cmd) */
	union {
		struct {
			uint8_t active;		/* still active */
			uint8_t num_items;	/* number of items */
			/* Current item being presented */
			uint8_t cur_item;
		} status;
		struct {
			/*
			 * Absolute time for this scan, measured from the
			 * start of the sequence.
			 */
			uint32_t time_us;
			uint8_t scan[0];	/* keyscan data */
		} add;
		struct {
			uint8_t start_item;	/* First item to return */
			uint8_t num_items;	/* Number of items to return */
		} collect;
	};
} __packed;

struct ec_result_keyscan_seq_ctrl {
	union {
		struct {
			uint8_t num_items;	/* Number of items */
			/* Data for each item */
			struct ec_collect_item item[0];
		} collect;
	};
} __packed;

/*****************************************************************************/
/* Temperature sensor commands */

/* Read temperature sensor info */
#define EC_CMD_TEMP_SENSOR_GET_INFO 0x70

struct ec_params_temp_sensor_get_info {
	uint8_t id;
} __packed;

struct ec_response_temp_sensor_get_info {
	char sensor_name[32];
	uint8_t sensor_type;
} __packed;

/*****************************************************************************/

/*
 * Note: host commands 0x80 - 0x87 are reserved to avoid conflict with ACPI
 * commands accidentally sent to the wrong interface.  See the ACPI section
 * below.
 */

/*****************************************************************************/
/* Host event commands */

/*
 * Host event mask params and response structures, shared by all of the host
 * event commands below.
 */
struct ec_params_host_event_mask {
	uint32_t mask;
} __packed;

struct ec_response_host_event_mask {
	uint32_t mask;
} __packed;

/* These all use ec_response_host_event_mask */
#define EC_CMD_HOST_EVENT_GET_B         0x87
#define EC_CMD_HOST_EVENT_GET_SMI_MASK  0x88
#define EC_CMD_HOST_EVENT_GET_SCI_MASK  0x89
#define EC_CMD_HOST_EVENT_GET_WAKE_MASK 0x8d

/* These all use ec_params_host_event_mask */
#define EC_CMD_HOST_EVENT_SET_SMI_MASK  0x8a
#define EC_CMD_HOST_EVENT_SET_SCI_MASK  0x8b
#define EC_CMD_HOST_EVENT_CLEAR         0x8c
#define EC_CMD_HOST_EVENT_SET_WAKE_MASK 0x8e
#define EC_CMD_HOST_EVENT_CLEAR_B       0x8f

/*****************************************************************************/
/* Switch commands */

/* Enable/disable LCD backlight */
#define EC_CMD_SWITCH_ENABLE_BKLIGHT 0x90

struct ec_params_switch_enable_backlight {
	uint8_t enabled;
} __packed;

/* Enable/disable WLAN/Bluetooth */
#define EC_CMD_SWITCH_ENABLE_WIRELESS 0x91

struct ec_params_switch_enable_wireless {
	uint8_t enabled;
} __packed;

/*****************************************************************************/
/* GPIO commands. Only available on EC if write protect has been disabled. */

/* Set GPIO output value */
#define EC_CMD_GPIO_SET 0x92

struct ec_params_gpio_set {
	char name[32];
	uint8_t val;
} __packed;

/* Get GPIO value */
#define EC_CMD_GPIO_GET 0x93

struct ec_params_gpio_get {
	char name[32];
} __packed;
struct ec_response_gpio_get {
	uint8_t val;
} __packed;

/*****************************************************************************/
/* I2C commands. Only available when flash write protect is unlocked. */

/* Read I2C bus */
#define EC_CMD_I2C_READ 0x94

struct ec_params_i2c_read {
	uint16_t addr;
	uint8_t read_size; /* Either 8 or 16. */
	uint8_t port;
	uint8_t offset;
} __packed;
struct ec_response_i2c_read {
	uint16_t data;
} __packed;

/* Write I2C bus */
#define EC_CMD_I2C_WRITE 0x95

struct ec_params_i2c_write {
	uint16_t data;
	uint16_t addr;
	uint8_t write_size; /* Either 8 or 16. */
	uint8_t port;
	uint8_t offset;
} __packed;

/*****************************************************************************/
/* Charge state commands. Only available when flash write protect unlocked. */

/* Force charge state machine to stop in idle mode */
#define EC_CMD_CHARGE_FORCE_IDLE 0x96

struct ec_params_force_idle {
	uint8_t enabled;
} __packed;

/*****************************************************************************/
/* Console commands. Only available when flash write protect is unlocked. */

/* Snapshot console output buffer for use by EC_CMD_CONSOLE_READ. */
#define EC_CMD_CONSOLE_SNAPSHOT 0x97

/*
 * Read next chunk of data from saved snapshot.
 *
 * Response is null-terminated string.  Empty string, if there is no more
 * remaining output.
 */
#define EC_CMD_CONSOLE_READ 0x98

/*****************************************************************************/

/*
 * Cut off battery power output if the battery supports.
 *
 * For unsupported battery, just don't implement this command and lets EC
 * return EC_RES_INVALID_COMMAND.
 */
#define EC_CMD_BATTERY_CUT_OFF 0x99

/*****************************************************************************/
/* USB port mux control. */

/*
 * Switch USB mux or return to automatic switching.
 */
#define EC_CMD_USB_MUX 0x9a

struct ec_params_usb_mux {
	uint8_t mux;
} __packed;

/*****************************************************************************/
/* LDOs / FETs control. */

enum ec_ldo_state {
	EC_LDO_STATE_OFF = 0,	/* the LDO / FET is shut down */
	EC_LDO_STATE_ON = 1,	/* the LDO / FET is ON / providing power */
};

/*
 * Switch on/off a LDO.
 */
#define EC_CMD_LDO_SET 0x9b

struct ec_params_ldo_set {
	uint8_t index;
	uint8_t state;
} __packed;

/*
 * Get LDO state.
 */
#define EC_CMD_LDO_GET 0x9c

struct ec_params_ldo_get {
	uint8_t index;
} __packed;

struct ec_response_ldo_get {
	uint8_t state;
} __packed;

/*****************************************************************************/
/* Temporary debug commands. TODO: remove this crosbug.com/p/13849 */

/*
 * Dump charge state machine context.
 *
 * Response is a binary dump of charge state machine context.
 */
#define EC_CMD_CHARGE_DUMP 0xa0

/*
 * Set maximum battery charging current.
 */
#define EC_CMD_CHARGE_CURRENT_LIMIT 0xa1

struct ec_params_current_limit {
	uint32_t limit;
} __packed;

/*****************************************************************************/
/* Smart battery pass-through */

/* Get / Set 16-bit smart battery registers */
#define EC_CMD_SB_READ_WORD   0xb0
#define EC_CMD_SB_WRITE_WORD  0xb1

/* Get / Set string smart battery parameters
 * formatted as SMBUS "block".
 */
#define EC_CMD_SB_READ_BLOCK  0xb2
#define EC_CMD_SB_WRITE_BLOCK 0xb3

struct ec_params_sb_rd {
	uint8_t reg;
} __packed;

struct ec_response_sb_rd_word {
	uint16_t value;
} __packed;

struct ec_params_sb_wr_word {
	uint8_t reg;
	uint16_t value;
} __packed;

struct ec_response_sb_rd_block {
	uint8_t data[32];
} __packed;

struct ec_params_sb_wr_block {
	uint8_t reg;
	uint16_t data[32];
} __packed;

/*****************************************************************************/
/* System commands */

/*
 * TODO: this is a confusing name, since it doesn't necessarily reboot the EC.
 * Rename to "set image" or something similar.
 */
#define EC_CMD_REBOOT_EC 0xd2

/* Command */
enum ec_reboot_cmd {
	EC_REBOOT_CANCEL = 0,        /* Cancel a pending reboot */
	EC_REBOOT_JUMP_RO = 1,       /* Jump to RO without rebooting */
	EC_REBOOT_JUMP_RW = 2,       /* Jump to RW without rebooting */
	/* (command 3 was jump to RW-B) */
	EC_REBOOT_COLD = 4,          /* Cold-reboot */
	EC_REBOOT_DISABLE_JUMP = 5,  /* Disable jump until next reboot */
	EC_REBOOT_HIBERNATE = 6      /* Hibernate EC */
};

/* Flags for ec_params_reboot_ec.reboot_flags */
#define EC_REBOOT_FLAG_RESERVED0      (1 << 0)  /* Was recovery request */
#define EC_REBOOT_FLAG_ON_AP_SHUTDOWN (1 << 1)  /* Reboot after AP shutdown */

struct ec_params_reboot_ec {
	uint8_t cmd;           /* enum ec_reboot_cmd */
	uint8_t flags;         /* See EC_REBOOT_FLAG_* */
} __packed;

/*
 * Get information on last EC panic.
 *
 * Returns variable-length platform-dependent panic information.  See panic.h
 * for details.
 */
#define EC_CMD_GET_PANIC_INFO 0xd3

/*****************************************************************************/
/*
 * ACPI commands
 *
 * These are valid ONLY on the ACPI command/data port.
 */

/*
 * ACPI Read Embedded Controller
 *
 * This reads from ACPI memory space on the EC (EC_ACPI_MEM_*).
 *
 * Use the following sequence:
 *
 *    - Write EC_CMD_ACPI_READ to EC_LPC_ADDR_ACPI_CMD
 *    - Wait for EC_LPC_CMDR_PENDING bit to clear
 *    - Write address to EC_LPC_ADDR_ACPI_DATA
 *    - Wait for EC_LPC_CMDR_DATA bit to set
 *    - Read value from EC_LPC_ADDR_ACPI_DATA
 */
#define EC_CMD_ACPI_READ 0x80

/*
 * ACPI Write Embedded Controller
 *
 * This reads from ACPI memory space on the EC (EC_ACPI_MEM_*).
 *
 * Use the following sequence:
 *
 *    - Write EC_CMD_ACPI_WRITE to EC_LPC_ADDR_ACPI_CMD
 *    - Wait for EC_LPC_CMDR_PENDING bit to clear
 *    - Write address to EC_LPC_ADDR_ACPI_DATA
 *    - Wait for EC_LPC_CMDR_PENDING bit to clear
 *    - Write value to EC_LPC_ADDR_ACPI_DATA
 */
#define EC_CMD_ACPI_WRITE 0x81

/*
 * ACPI Query Embedded Controller
 *
 * This clears the lowest-order bit in the currently pending host events, and
 * sets the result code to the 1-based index of the bit (event 0x00000001 = 1,
 * event 0x80000000 = 32), or 0 if no event was pending.
 */
#define EC_CMD_ACPI_QUERY_EVENT 0x84

/* Valid addresses in ACPI memory space, for read/write commands */
/* Memory space version; set to EC_ACPI_MEM_VERSION_CURRENT */
#define EC_ACPI_MEM_VERSION            0x00
/*
 * Test location; writing value here updates test compliment byte to (0xff -
 * value).
 */
#define EC_ACPI_MEM_TEST               0x01
/* Test compliment; writes here are ignored. */
#define EC_ACPI_MEM_TEST_COMPLIMENT    0x02
/* Keyboard backlight brightness percent (0 - 100) */
#define EC_ACPI_MEM_KEYBOARD_BACKLIGHT 0x03

/* Current version of ACPI memory address space */
#define EC_ACPI_MEM_VERSION_CURRENT 1


/*****************************************************************************/
/*
 * Special commands
 *
 * These do not follow the normal rules for commands.  See each command for
 * details.
 */

/*
 * Reboot NOW
 *
 * This command will work even when the EC LPC interface is busy, because the
 * reboot command is processed at interrupt level.  Note that when the EC
 * reboots, the host will reboot too, so there is no response to this command.
 *
 * Use EC_CMD_REBOOT_EC to reboot the EC more politely.
 */
#define EC_CMD_REBOOT 0xd1  /* Think "die" */

/*
 * Resend last response (not supported on LPC).
 *
 * Returns EC_RES_UNAVAILABLE if there is no response available - for example,
 * there was no previous command, or the previous command's response was too
 * big to save.
 */
#define EC_CMD_RESEND_RESPONSE 0xdb

/*
 * This header byte on a command indicate version 0. Any header byte less
 * than this means that we are talking to an old EC which doesn't support
 * versioning. In that case, we assume version 0.
 *
 * Header bytes greater than this indicate a later version. For example,
 * EC_CMD_VERSION0 + 1 means we are using version 1.
 *
 * The old EC interface must not use commands 0dc or higher.
 */
#define EC_CMD_VERSION0 0xdc

#endif  /* !__ACPI__ */

#endif  /* __CROS_EC_COMMANDS_H */