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
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
|
/*
* TI OMAP4 ISS V4L2 Driver
*
* Copyright (C) 2012, Texas Instruments
*
* Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
*
* 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 2 of the License, or
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include "iss.h"
#include "iss_regs.h"
#define ISS_PRINT_REGISTER(iss, name)\
dev_dbg(iss->dev, "###ISS " #name "=0x%08x\n", \
iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_##name))
static void iss_print_status(struct iss_device *iss)
{
dev_dbg(iss->dev, "-------------ISS HL Register dump-------------\n");
ISS_PRINT_REGISTER(iss, HL_REVISION);
ISS_PRINT_REGISTER(iss, HL_SYSCONFIG);
ISS_PRINT_REGISTER(iss, HL_IRQSTATUS(5));
ISS_PRINT_REGISTER(iss, HL_IRQENABLE_SET(5));
ISS_PRINT_REGISTER(iss, HL_IRQENABLE_CLR(5));
ISS_PRINT_REGISTER(iss, CTRL);
ISS_PRINT_REGISTER(iss, CLKCTRL);
ISS_PRINT_REGISTER(iss, CLKSTAT);
dev_dbg(iss->dev, "-----------------------------------------------\n");
}
/*
* omap4iss_flush - Post pending L3 bus writes by doing a register readback
* @iss: OMAP4 ISS device
*
* In order to force posting of pending writes, we need to write and
* readback the same register, in this case the revision register.
*
* See this link for reference:
* http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
*/
void omap4iss_flush(struct iss_device *iss)
{
iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION, 0);
iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
}
/*
* iss_isp_enable_interrupts - Enable ISS ISP interrupts.
* @iss: OMAP4 ISS device
*/
static void omap4iss_isp_enable_interrupts(struct iss_device *iss)
{
static const u32 isp_irq = ISP5_IRQ_OCP_ERR |
ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
ISP5_IRQ_RSZ_FIFO_OVF |
ISP5_IRQ_RSZ_INT_DMA |
ISP5_IRQ_ISIF_INT(0);
/* Enable ISP interrupts */
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0), isp_irq);
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_SET(0),
isp_irq);
}
/*
* iss_isp_disable_interrupts - Disable ISS interrupts.
* @iss: OMAP4 ISS device
*/
static void omap4iss_isp_disable_interrupts(struct iss_device *iss)
{
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_CLR(0), ~0);
}
/*
* iss_enable_interrupts - Enable ISS interrupts.
* @iss: OMAP4 ISS device
*/
static void iss_enable_interrupts(struct iss_device *iss)
{
static const u32 hl_irq = ISS_HL_IRQ_CSIA | ISS_HL_IRQ_CSIB
| ISS_HL_IRQ_ISP(0);
/* Enable HL interrupts */
iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), hl_irq);
iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_SET(5), hl_irq);
if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
omap4iss_isp_enable_interrupts(iss);
}
/*
* iss_disable_interrupts - Disable ISS interrupts.
* @iss: OMAP4 ISS device
*/
static void iss_disable_interrupts(struct iss_device *iss)
{
if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
omap4iss_isp_disable_interrupts(iss);
iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_CLR(5), ~0);
}
int omap4iss_get_external_info(struct iss_pipeline *pipe,
struct media_link *link)
{
struct iss_device *iss =
container_of(pipe, struct iss_video, pipe)->iss;
struct v4l2_subdev_format fmt;
struct v4l2_ctrl *ctrl;
int ret;
if (!pipe->external)
return 0;
if (pipe->external_rate)
return 0;
memset(&fmt, 0, sizeof(fmt));
fmt.pad = link->source->index;
fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(link->sink->entity),
pad, get_fmt, NULL, &fmt);
if (ret < 0)
return -EPIPE;
pipe->external_bpp = omap4iss_video_format_info(fmt.format.code)->bpp;
ctrl = v4l2_ctrl_find(pipe->external->ctrl_handler,
V4L2_CID_PIXEL_RATE);
if (ctrl == NULL) {
dev_warn(iss->dev, "no pixel rate control in subdev %s\n",
pipe->external->name);
return -EPIPE;
}
pipe->external_rate = v4l2_ctrl_g_ctrl_int64(ctrl);
return 0;
}
/*
* Configure the bridge. Valid inputs are
*
* IPIPEIF_INPUT_CSI2A: CSI2a receiver
* IPIPEIF_INPUT_CSI2B: CSI2b receiver
*
* The bridge and lane shifter are configured according to the selected input
* and the ISP platform data.
*/
void omap4iss_configure_bridge(struct iss_device *iss,
enum ipipeif_input_entity input)
{
u32 issctrl_val;
u32 isp5ctrl_val;
issctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL);
issctrl_val &= ~ISS_CTRL_INPUT_SEL_MASK;
issctrl_val &= ~ISS_CTRL_CLK_DIV_MASK;
isp5ctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL);
switch (input) {
case IPIPEIF_INPUT_CSI2A:
issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2A;
break;
case IPIPEIF_INPUT_CSI2B:
issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2B;
break;
default:
return;
}
issctrl_val |= ISS_CTRL_SYNC_DETECT_VS_RAISING;
isp5ctrl_val |= ISP5_CTRL_VD_PULSE_EXT | ISP5_CTRL_PSYNC_CLK_SEL |
ISP5_CTRL_SYNC_ENABLE;
iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL, issctrl_val);
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, isp5ctrl_val);
}
#ifdef ISS_ISR_DEBUG
static void iss_isr_dbg(struct iss_device *iss, u32 irqstatus)
{
static const char * const name[] = {
"ISP_0",
"ISP_1",
"ISP_2",
"ISP_3",
"CSIA",
"CSIB",
"CCP2_0",
"CCP2_1",
"CCP2_2",
"CCP2_3",
"CBUFF",
"BTE",
"SIMCOP_0",
"SIMCOP_1",
"SIMCOP_2",
"SIMCOP_3",
"CCP2_8",
"HS_VS",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
};
unsigned int i;
dev_dbg(iss->dev, "ISS IRQ: ");
for (i = 0; i < ARRAY_SIZE(name); i++) {
if ((1 << i) & irqstatus)
pr_cont("%s ", name[i]);
}
pr_cont("\n");
}
static void iss_isp_isr_dbg(struct iss_device *iss, u32 irqstatus)
{
static const char * const name[] = {
"ISIF_0",
"ISIF_1",
"ISIF_2",
"ISIF_3",
"IPIPEREQ",
"IPIPELAST_PIX",
"IPIPEDMA",
"IPIPEBSC",
"IPIPEHST",
"IPIPEIF",
"AEW",
"AF",
"H3A",
"RSZ_REG",
"RSZ_LAST_PIX",
"RSZ_DMA",
"RSZ_CYC_RZA",
"RSZ_CYC_RZB",
"RSZ_FIFO_OVF",
"RSZ_FIFO_IN_BLK_ERR",
"20",
"21",
"RSZ_EOF0",
"RSZ_EOF1",
"H3A_EOF",
"IPIPE_EOF",
"26",
"IPIPE_DPC_INI",
"IPIPE_DPC_RNEW0",
"IPIPE_DPC_RNEW1",
"30",
"OCP_ERR",
};
unsigned int i;
dev_dbg(iss->dev, "ISP IRQ: ");
for (i = 0; i < ARRAY_SIZE(name); i++) {
if ((1 << i) & irqstatus)
pr_cont("%s ", name[i]);
}
pr_cont("\n");
}
#endif
/*
* iss_isr - Interrupt Service Routine for ISS module.
* @irq: Not used currently.
* @_iss: Pointer to the OMAP4 ISS device
*
* Handles the corresponding callback if plugged in.
*
* Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
* IRQ wasn't handled.
*/
static irqreturn_t iss_isr(int irq, void *_iss)
{
static const u32 ipipeif_events = ISP5_IRQ_IPIPEIF_IRQ |
ISP5_IRQ_ISIF_INT(0);
static const u32 resizer_events = ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
ISP5_IRQ_RSZ_FIFO_OVF |
ISP5_IRQ_RSZ_INT_DMA;
struct iss_device *iss = _iss;
u32 irqstatus;
irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5));
iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), irqstatus);
if (irqstatus & ISS_HL_IRQ_CSIA)
omap4iss_csi2_isr(&iss->csi2a);
if (irqstatus & ISS_HL_IRQ_CSIB)
omap4iss_csi2_isr(&iss->csi2b);
if (irqstatus & ISS_HL_IRQ_ISP(0)) {
u32 isp_irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1,
ISP5_IRQSTATUS(0));
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0),
isp_irqstatus);
if (isp_irqstatus & ISP5_IRQ_OCP_ERR)
dev_dbg(iss->dev, "ISP5 OCP Error!\n");
if (isp_irqstatus & ipipeif_events) {
omap4iss_ipipeif_isr(&iss->ipipeif,
isp_irqstatus & ipipeif_events);
}
if (isp_irqstatus & resizer_events)
omap4iss_resizer_isr(&iss->resizer,
isp_irqstatus & resizer_events);
#ifdef ISS_ISR_DEBUG
iss_isp_isr_dbg(iss, isp_irqstatus);
#endif
}
omap4iss_flush(iss);
#ifdef ISS_ISR_DEBUG
iss_isr_dbg(iss, irqstatus);
#endif
return IRQ_HANDLED;
}
/* -----------------------------------------------------------------------------
* Pipeline power management
*
* Entities must be powered up when part of a pipeline that contains at least
* one open video device node.
*
* To achieve this use the entity use_count field to track the number of users.
* For entities corresponding to video device nodes the use_count field stores
* the users count of the node. For entities corresponding to subdevs the
* use_count field stores the total number of users of all video device nodes
* in the pipeline.
*
* The omap4iss_pipeline_pm_use() function must be called in the open() and
* close() handlers of video device nodes. It increments or decrements the use
* count of all subdev entities in the pipeline.
*
* To react to link management on powered pipelines, the link setup notification
* callback updates the use count of all entities in the source and sink sides
* of the link.
*/
/*
* iss_pipeline_pm_use_count - Count the number of users of a pipeline
* @entity: The entity
*
* Return the total number of users of all video device nodes in the pipeline.
*/
static int iss_pipeline_pm_use_count(struct media_entity *entity)
{
struct media_entity_graph graph;
int use = 0;
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
use += entity->use_count;
}
return use;
}
/*
* iss_pipeline_pm_power_one - Apply power change to an entity
* @entity: The entity
* @change: Use count change
*
* Change the entity use count by @change. If the entity is a subdev update its
* power state by calling the core::s_power operation when the use count goes
* from 0 to != 0 or from != 0 to 0.
*
* Return 0 on success or a negative error code on failure.
*/
static int iss_pipeline_pm_power_one(struct media_entity *entity, int change)
{
struct v4l2_subdev *subdev;
subdev = media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV
? media_entity_to_v4l2_subdev(entity) : NULL;
if (entity->use_count == 0 && change > 0 && subdev != NULL) {
int ret;
ret = v4l2_subdev_call(subdev, core, s_power, 1);
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
}
entity->use_count += change;
WARN_ON(entity->use_count < 0);
if (entity->use_count == 0 && change < 0 && subdev != NULL)
v4l2_subdev_call(subdev, core, s_power, 0);
return 0;
}
/*
* iss_pipeline_pm_power - Apply power change to all entities in a pipeline
* @entity: The entity
* @change: Use count change
*
* Walk the pipeline to update the use count and the power state of all non-node
* entities.
*
* Return 0 on success or a negative error code on failure.
*/
static int iss_pipeline_pm_power(struct media_entity *entity, int change)
{
struct media_entity_graph graph;
struct media_entity *first = entity;
int ret = 0;
if (!change)
return 0;
media_entity_graph_walk_start(&graph, entity);
while (!ret && (entity = media_entity_graph_walk_next(&graph)))
if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
ret = iss_pipeline_pm_power_one(entity, change);
if (!ret)
return 0;
media_entity_graph_walk_start(&graph, first);
while ((first = media_entity_graph_walk_next(&graph))
&& first != entity)
if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE)
iss_pipeline_pm_power_one(first, -change);
return ret;
}
/*
* omap4iss_pipeline_pm_use - Update the use count of an entity
* @entity: The entity
* @use: Use (1) or stop using (0) the entity
*
* Update the use count of all entities in the pipeline and power entities on or
* off accordingly.
*
* Return 0 on success or a negative error code on failure. Powering entities
* off is assumed to never fail. No failure can occur when the use parameter is
* set to 0.
*/
int omap4iss_pipeline_pm_use(struct media_entity *entity, int use)
{
int change = use ? 1 : -1;
int ret;
mutex_lock(&entity->parent->graph_mutex);
/* Apply use count to node. */
entity->use_count += change;
WARN_ON(entity->use_count < 0);
/* Apply power change to connected non-nodes. */
ret = iss_pipeline_pm_power(entity, change);
if (ret < 0)
entity->use_count -= change;
mutex_unlock(&entity->parent->graph_mutex);
return ret;
}
/*
* iss_pipeline_link_notify - Link management notification callback
* @link: The link
* @flags: New link flags that will be applied
*
* React to link management on powered pipelines by updating the use count of
* all entities in the source and sink sides of the link. Entities are powered
* on or off accordingly.
*
* Return 0 on success or a negative error code on failure. Powering entities
* off is assumed to never fail. This function will not fail for disconnection
* events.
*/
static int iss_pipeline_link_notify(struct media_link *link, u32 flags,
unsigned int notification)
{
struct media_entity *source = link->source->entity;
struct media_entity *sink = link->sink->entity;
int source_use = iss_pipeline_pm_use_count(source);
int sink_use = iss_pipeline_pm_use_count(sink);
int ret;
if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
!(link->flags & MEDIA_LNK_FL_ENABLED)) {
/* Powering off entities is assumed to never fail. */
iss_pipeline_pm_power(source, -sink_use);
iss_pipeline_pm_power(sink, -source_use);
return 0;
}
if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
(flags & MEDIA_LNK_FL_ENABLED)) {
ret = iss_pipeline_pm_power(source, sink_use);
if (ret < 0)
return ret;
ret = iss_pipeline_pm_power(sink, source_use);
if (ret < 0)
iss_pipeline_pm_power(source, -sink_use);
return ret;
}
return 0;
}
/* -----------------------------------------------------------------------------
* Pipeline stream management
*/
/*
* iss_pipeline_enable - Enable streaming on a pipeline
* @pipe: ISS pipeline
* @mode: Stream mode (single shot or continuous)
*
* Walk the entities chain starting at the pipeline output video node and start
* all modules in the chain in the given mode.
*
* Return 0 if successful, or the return value of the failed video::s_stream
* operation otherwise.
*/
static int iss_pipeline_enable(struct iss_pipeline *pipe,
enum iss_pipeline_stream_state mode)
{
struct iss_device *iss = pipe->output->iss;
struct media_entity *entity;
struct media_pad *pad;
struct v4l2_subdev *subdev;
unsigned long flags;
int ret;
/* If one of the entities in the pipeline has crashed it will not work
* properly. Refuse to start streaming in that case. This check must be
* performed before the loop below to avoid starting entities if the
* pipeline won't start anyway (those entities would then likely fail to
* stop, making the problem worse).
*/
if (pipe->entities & iss->crashed)
return -EIO;
spin_lock_irqsave(&pipe->lock, flags);
pipe->state &= ~(ISS_PIPELINE_IDLE_INPUT | ISS_PIPELINE_IDLE_OUTPUT);
spin_unlock_irqrestore(&pipe->lock, flags);
pipe->do_propagation = false;
entity = &pipe->output->video.entity;
while (1) {
pad = &entity->pads[0];
if (!(pad->flags & MEDIA_PAD_FL_SINK))
break;
pad = media_entity_remote_pad(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
break;
entity = pad->entity;
subdev = media_entity_to_v4l2_subdev(entity);
ret = v4l2_subdev_call(subdev, video, s_stream, mode);
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
}
iss_print_status(pipe->output->iss);
return 0;
}
/*
* iss_pipeline_disable - Disable streaming on a pipeline
* @pipe: ISS pipeline
*
* Walk the entities chain starting at the pipeline output video node and stop
* all modules in the chain. Wait synchronously for the modules to be stopped if
* necessary.
*/
static int iss_pipeline_disable(struct iss_pipeline *pipe)
{
struct iss_device *iss = pipe->output->iss;
struct media_entity *entity;
struct media_pad *pad;
struct v4l2_subdev *subdev;
int failure = 0;
int ret;
entity = &pipe->output->video.entity;
while (1) {
pad = &entity->pads[0];
if (!(pad->flags & MEDIA_PAD_FL_SINK))
break;
pad = media_entity_remote_pad(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
break;
entity = pad->entity;
subdev = media_entity_to_v4l2_subdev(entity);
ret = v4l2_subdev_call(subdev, video, s_stream, 0);
if (ret < 0) {
dev_dbg(iss->dev, "%s: module stop timeout.\n",
subdev->name);
/* If the entity failed to stopped, assume it has
* crashed. Mark it as such, the ISS will be reset when
* applications will release it.
*/
iss->crashed |= 1U << subdev->entity.id;
failure = -ETIMEDOUT;
}
}
return failure;
}
/*
* omap4iss_pipeline_set_stream - Enable/disable streaming on a pipeline
* @pipe: ISS pipeline
* @state: Stream state (stopped, single shot or continuous)
*
* Set the pipeline to the given stream state. Pipelines can be started in
* single-shot or continuous mode.
*
* Return 0 if successful, or the return value of the failed video::s_stream
* operation otherwise. The pipeline state is not updated when the operation
* fails, except when stopping the pipeline.
*/
int omap4iss_pipeline_set_stream(struct iss_pipeline *pipe,
enum iss_pipeline_stream_state state)
{
int ret;
if (state == ISS_PIPELINE_STREAM_STOPPED)
ret = iss_pipeline_disable(pipe);
else
ret = iss_pipeline_enable(pipe, state);
if (ret == 0 || state == ISS_PIPELINE_STREAM_STOPPED)
pipe->stream_state = state;
return ret;
}
/*
* omap4iss_pipeline_cancel_stream - Cancel stream on a pipeline
* @pipe: ISS pipeline
*
* Cancelling a stream mark all buffers on all video nodes in the pipeline as
* erroneous and makes sure no new buffer can be queued. This function is called
* when a fatal error that prevents any further operation on the pipeline
* occurs.
*/
void omap4iss_pipeline_cancel_stream(struct iss_pipeline *pipe)
{
if (pipe->input)
omap4iss_video_cancel_stream(pipe->input);
if (pipe->output)
omap4iss_video_cancel_stream(pipe->output);
}
/*
* iss_pipeline_is_last - Verify if entity has an enabled link to the output
* video node
* @me: ISS module's media entity
*
* Returns 1 if the entity has an enabled link to the output video node or 0
* otherwise. It's true only while pipeline can have no more than one output
* node.
*/
static int iss_pipeline_is_last(struct media_entity *me)
{
struct iss_pipeline *pipe;
struct media_pad *pad;
if (!me->pipe)
return 0;
pipe = to_iss_pipeline(me);
if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED)
return 0;
pad = media_entity_remote_pad(&pipe->output->pad);
return pad->entity == me;
}
static int iss_reset(struct iss_device *iss)
{
unsigned long timeout = 0;
iss_reg_set(iss, OMAP4_ISS_MEM_TOP, ISS_HL_SYSCONFIG,
ISS_HL_SYSCONFIG_SOFTRESET);
while (iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_SYSCONFIG) &
ISS_HL_SYSCONFIG_SOFTRESET) {
if (timeout++ > 100) {
dev_alert(iss->dev, "cannot reset ISS\n");
return -ETIMEDOUT;
}
usleep_range(10, 10);
}
iss->crashed = 0;
return 0;
}
static int iss_isp_reset(struct iss_device *iss)
{
unsigned long timeout = 0;
/* Fist, ensure that the ISP is IDLE (no transactions happening) */
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG,
ISP5_SYSCONFIG_STANDBYMODE_MASK,
ISP5_SYSCONFIG_STANDBYMODE_SMART);
iss_reg_set(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, ISP5_CTRL_MSTANDBY);
for (;;) {
if (iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL) &
ISP5_CTRL_MSTANDBY_WAIT)
break;
if (timeout++ > 1000) {
dev_alert(iss->dev, "cannot set ISP5 to standby\n");
return -ETIMEDOUT;
}
usleep_range(1000, 1500);
}
/* Now finally, do the reset */
iss_reg_set(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG,
ISP5_SYSCONFIG_SOFTRESET);
timeout = 0;
while (iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG) &
ISP5_SYSCONFIG_SOFTRESET) {
if (timeout++ > 1000) {
dev_alert(iss->dev, "cannot reset ISP5\n");
return -ETIMEDOUT;
}
usleep_range(1000, 1500);
}
return 0;
}
/*
* iss_module_sync_idle - Helper to sync module with its idle state
* @me: ISS submodule's media entity
* @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
* @stopping: flag which tells module wants to stop
*
* This function checks if ISS submodule needs to wait for next interrupt. If
* yes, makes the caller to sleep while waiting for such event.
*/
int omap4iss_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
atomic_t *stopping)
{
struct iss_pipeline *pipe = to_iss_pipeline(me);
struct iss_video *video = pipe->output;
unsigned long flags;
if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED ||
(pipe->stream_state == ISS_PIPELINE_STREAM_SINGLESHOT &&
!iss_pipeline_ready(pipe)))
return 0;
/*
* atomic_set() doesn't include memory barrier on ARM platform for SMP
* scenario. We'll call it here to avoid race conditions.
*/
atomic_set(stopping, 1);
smp_wmb();
/*
* If module is the last one, it's writing to memory. In this case,
* it's necessary to check if the module is already paused due to
* DMA queue underrun or if it has to wait for next interrupt to be
* idle.
* If it isn't the last one, the function won't sleep but *stopping
* will still be set to warn next submodule caller's interrupt the
* module wants to be idle.
*/
if (!iss_pipeline_is_last(me))
return 0;
spin_lock_irqsave(&video->qlock, flags);
if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
spin_unlock_irqrestore(&video->qlock, flags);
atomic_set(stopping, 0);
smp_wmb();
return 0;
}
spin_unlock_irqrestore(&video->qlock, flags);
if (!wait_event_timeout(*wait, !atomic_read(stopping),
msecs_to_jiffies(1000))) {
atomic_set(stopping, 0);
smp_wmb();
return -ETIMEDOUT;
}
return 0;
}
/*
* omap4iss_module_sync_is_stopped - Helper to verify if module was stopping
* @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
* @stopping: flag which tells module wants to stop
*
* This function checks if ISS submodule was stopping. In case of yes, it
* notices the caller by setting stopping to 0 and waking up the wait queue.
* Returns 1 if it was stopping or 0 otherwise.
*/
int omap4iss_module_sync_is_stopping(wait_queue_head_t *wait,
atomic_t *stopping)
{
if (atomic_cmpxchg(stopping, 1, 0)) {
wake_up(wait);
return 1;
}
return 0;
}
/* --------------------------------------------------------------------------
* Clock management
*/
#define ISS_CLKCTRL_MASK (ISS_CLKCTRL_CSI2_A |\
ISS_CLKCTRL_CSI2_B |\
ISS_CLKCTRL_ISP)
static int __iss_subclk_update(struct iss_device *iss)
{
u32 clk = 0;
int ret = 0, timeout = 1000;
if (iss->subclk_resources & OMAP4_ISS_SUBCLK_CSI2_A)
clk |= ISS_CLKCTRL_CSI2_A;
if (iss->subclk_resources & OMAP4_ISS_SUBCLK_CSI2_B)
clk |= ISS_CLKCTRL_CSI2_B;
if (iss->subclk_resources & OMAP4_ISS_SUBCLK_ISP)
clk |= ISS_CLKCTRL_ISP;
iss_reg_update(iss, OMAP4_ISS_MEM_TOP, ISS_CLKCTRL,
ISS_CLKCTRL_MASK, clk);
/* Wait for HW assertion */
while (--timeout > 0) {
udelay(1);
if ((iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CLKSTAT) &
ISS_CLKCTRL_MASK) == clk)
break;
}
if (!timeout)
ret = -EBUSY;
return ret;
}
int omap4iss_subclk_enable(struct iss_device *iss,
enum iss_subclk_resource res)
{
iss->subclk_resources |= res;
return __iss_subclk_update(iss);
}
int omap4iss_subclk_disable(struct iss_device *iss,
enum iss_subclk_resource res)
{
iss->subclk_resources &= ~res;
return __iss_subclk_update(iss);
}
#define ISS_ISP5_CLKCTRL_MASK (ISP5_CTRL_BL_CLK_ENABLE |\
ISP5_CTRL_ISIF_CLK_ENABLE |\
ISP5_CTRL_H3A_CLK_ENABLE |\
ISP5_CTRL_RSZ_CLK_ENABLE |\
ISP5_CTRL_IPIPE_CLK_ENABLE |\
ISP5_CTRL_IPIPEIF_CLK_ENABLE)
static void __iss_isp_subclk_update(struct iss_device *iss)
{
u32 clk = 0;
if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_ISIF)
clk |= ISP5_CTRL_ISIF_CLK_ENABLE;
if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_H3A)
clk |= ISP5_CTRL_H3A_CLK_ENABLE;
if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_RSZ)
clk |= ISP5_CTRL_RSZ_CLK_ENABLE;
if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_IPIPE)
clk |= ISP5_CTRL_IPIPE_CLK_ENABLE;
if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_IPIPEIF)
clk |= ISP5_CTRL_IPIPEIF_CLK_ENABLE;
if (clk)
clk |= ISP5_CTRL_BL_CLK_ENABLE;
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL,
ISS_ISP5_CLKCTRL_MASK, clk);
}
void omap4iss_isp_subclk_enable(struct iss_device *iss,
enum iss_isp_subclk_resource res)
{
iss->isp_subclk_resources |= res;
__iss_isp_subclk_update(iss);
}
void omap4iss_isp_subclk_disable(struct iss_device *iss,
enum iss_isp_subclk_resource res)
{
iss->isp_subclk_resources &= ~res;
__iss_isp_subclk_update(iss);
}
/*
* iss_enable_clocks - Enable ISS clocks
* @iss: OMAP4 ISS device
*
* Return 0 if successful, or clk_enable return value if any of tthem fails.
*/
static int iss_enable_clocks(struct iss_device *iss)
{
int ret;
ret = clk_enable(iss->iss_fck);
if (ret) {
dev_err(iss->dev, "clk_enable iss_fck failed\n");
return ret;
}
ret = clk_enable(iss->iss_ctrlclk);
if (ret) {
dev_err(iss->dev, "clk_enable iss_ctrlclk failed\n");
clk_disable(iss->iss_fck);
return ret;
}
return 0;
}
/*
* iss_disable_clocks - Disable ISS clocks
* @iss: OMAP4 ISS device
*/
static void iss_disable_clocks(struct iss_device *iss)
{
clk_disable(iss->iss_ctrlclk);
clk_disable(iss->iss_fck);
}
static void iss_put_clocks(struct iss_device *iss)
{
if (iss->iss_fck) {
clk_put(iss->iss_fck);
iss->iss_fck = NULL;
}
if (iss->iss_ctrlclk) {
clk_put(iss->iss_ctrlclk);
iss->iss_ctrlclk = NULL;
}
}
static int iss_get_clocks(struct iss_device *iss)
{
iss->iss_fck = clk_get(iss->dev, "iss_fck");
if (IS_ERR(iss->iss_fck)) {
dev_err(iss->dev, "Unable to get iss_fck clock info\n");
iss_put_clocks(iss);
return PTR_ERR(iss->iss_fck);
}
iss->iss_ctrlclk = clk_get(iss->dev, "iss_ctrlclk");
if (IS_ERR(iss->iss_ctrlclk)) {
dev_err(iss->dev, "Unable to get iss_ctrlclk clock info\n");
iss_put_clocks(iss);
return PTR_ERR(iss->iss_fck);
}
return 0;
}
/*
* omap4iss_get - Acquire the ISS resource.
*
* Initializes the clocks for the first acquire.
*
* Increment the reference count on the ISS. If the first reference is taken,
* enable clocks and power-up all submodules.
*
* Return a pointer to the ISS device structure, or NULL if an error occurred.
*/
struct iss_device *omap4iss_get(struct iss_device *iss)
{
struct iss_device *__iss = iss;
if (iss == NULL)
return NULL;
mutex_lock(&iss->iss_mutex);
if (iss->ref_count > 0)
goto out;
if (iss_enable_clocks(iss) < 0) {
__iss = NULL;
goto out;
}
iss_enable_interrupts(iss);
out:
if (__iss != NULL)
iss->ref_count++;
mutex_unlock(&iss->iss_mutex);
return __iss;
}
/*
* omap4iss_put - Release the ISS
*
* Decrement the reference count on the ISS. If the last reference is released,
* power-down all submodules, disable clocks and free temporary buffers.
*/
void omap4iss_put(struct iss_device *iss)
{
if (iss == NULL)
return;
mutex_lock(&iss->iss_mutex);
BUG_ON(iss->ref_count == 0);
if (--iss->ref_count == 0) {
iss_disable_interrupts(iss);
/* Reset the ISS if an entity has failed to stop. This is the
* only way to recover from such conditions, although it would
* be worth investigating whether resetting the ISP only can't
* fix the problem in some cases.
*/
if (iss->crashed)
iss_reset(iss);
iss_disable_clocks(iss);
}
mutex_unlock(&iss->iss_mutex);
}
static int iss_map_mem_resource(struct platform_device *pdev,
struct iss_device *iss,
enum iss_mem_resources res)
{
struct resource *mem;
/* request the mem region for the camera registers */
mem = platform_get_resource(pdev, IORESOURCE_MEM, res);
if (!mem) {
dev_err(iss->dev, "no mem resource?\n");
return -ENODEV;
}
if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
dev_err(iss->dev,
"cannot reserve camera register I/O region\n");
return -ENODEV;
}
iss->res[res] = mem;
/* map the region */
iss->regs[res] = ioremap_nocache(mem->start, resource_size(mem));
if (!iss->regs[res]) {
dev_err(iss->dev, "cannot map camera register I/O region\n");
return -ENODEV;
}
return 0;
}
static void iss_unregister_entities(struct iss_device *iss)
{
omap4iss_resizer_unregister_entities(&iss->resizer);
omap4iss_ipipe_unregister_entities(&iss->ipipe);
omap4iss_ipipeif_unregister_entities(&iss->ipipeif);
omap4iss_csi2_unregister_entities(&iss->csi2a);
omap4iss_csi2_unregister_entities(&iss->csi2b);
v4l2_device_unregister(&iss->v4l2_dev);
media_device_unregister(&iss->media_dev);
}
/*
* iss_register_subdev_group - Register a group of subdevices
* @iss: OMAP4 ISS device
* @board_info: I2C subdevs board information array
*
* Register all I2C subdevices in the board_info array. The array must be
* terminated by a NULL entry, and the first entry must be the sensor.
*
* Return a pointer to the sensor media entity if it has been successfully
* registered, or NULL otherwise.
*/
static struct v4l2_subdev *
iss_register_subdev_group(struct iss_device *iss,
struct iss_subdev_i2c_board_info *board_info)
{
struct v4l2_subdev *sensor = NULL;
unsigned int first;
if (board_info->board_info == NULL)
return NULL;
for (first = 1; board_info->board_info; ++board_info, first = 0) {
struct v4l2_subdev *subdev;
struct i2c_adapter *adapter;
adapter = i2c_get_adapter(board_info->i2c_adapter_id);
if (adapter == NULL) {
dev_err(iss->dev,
"%s: Unable to get I2C adapter %d for device %s\n",
__func__, board_info->i2c_adapter_id,
board_info->board_info->type);
continue;
}
subdev = v4l2_i2c_new_subdev_board(&iss->v4l2_dev, adapter,
board_info->board_info, NULL);
if (subdev == NULL) {
dev_err(iss->dev, "%s: Unable to register subdev %s\n",
__func__, board_info->board_info->type);
continue;
}
if (first)
sensor = subdev;
}
return sensor;
}
static int iss_register_entities(struct iss_device *iss)
{
struct iss_platform_data *pdata = iss->pdata;
struct iss_v4l2_subdevs_group *subdevs;
int ret;
iss->media_dev.dev = iss->dev;
strlcpy(iss->media_dev.model, "TI OMAP4 ISS",
sizeof(iss->media_dev.model));
iss->media_dev.hw_revision = iss->revision;
iss->media_dev.link_notify = iss_pipeline_link_notify;
ret = media_device_register(&iss->media_dev);
if (ret < 0) {
dev_err(iss->dev, "%s: Media device registration failed (%d)\n",
__func__, ret);
return ret;
}
iss->v4l2_dev.mdev = &iss->media_dev;
ret = v4l2_device_register(iss->dev, &iss->v4l2_dev);
if (ret < 0) {
dev_err(iss->dev, "%s: V4L2 device registration failed (%d)\n",
__func__, ret);
goto done;
}
/* Register internal entities */
ret = omap4iss_csi2_register_entities(&iss->csi2a, &iss->v4l2_dev);
if (ret < 0)
goto done;
ret = omap4iss_csi2_register_entities(&iss->csi2b, &iss->v4l2_dev);
if (ret < 0)
goto done;
ret = omap4iss_ipipeif_register_entities(&iss->ipipeif, &iss->v4l2_dev);
if (ret < 0)
goto done;
ret = omap4iss_ipipe_register_entities(&iss->ipipe, &iss->v4l2_dev);
if (ret < 0)
goto done;
ret = omap4iss_resizer_register_entities(&iss->resizer, &iss->v4l2_dev);
if (ret < 0)
goto done;
/* Register external entities */
for (subdevs = pdata->subdevs; subdevs && subdevs->subdevs; ++subdevs) {
struct v4l2_subdev *sensor;
struct media_entity *input;
unsigned int flags;
unsigned int pad;
sensor = iss_register_subdev_group(iss, subdevs->subdevs);
if (sensor == NULL)
continue;
sensor->host_priv = subdevs;
/* Connect the sensor to the correct interface module.
* CSI2a receiver through CSIPHY1, or
* CSI2b receiver through CSIPHY2
*/
switch (subdevs->interface) {
case ISS_INTERFACE_CSI2A_PHY1:
input = &iss->csi2a.subdev.entity;
pad = CSI2_PAD_SINK;
flags = MEDIA_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_ENABLED;
break;
case ISS_INTERFACE_CSI2B_PHY2:
input = &iss->csi2b.subdev.entity;
pad = CSI2_PAD_SINK;
flags = MEDIA_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_ENABLED;
break;
default:
dev_err(iss->dev, "%s: invalid interface type %u\n",
__func__, subdevs->interface);
ret = -EINVAL;
goto done;
}
ret = media_entity_create_link(&sensor->entity, 0, input, pad,
flags);
if (ret < 0)
goto done;
}
ret = v4l2_device_register_subdev_nodes(&iss->v4l2_dev);
done:
if (ret < 0)
iss_unregister_entities(iss);
return ret;
}
static void iss_cleanup_modules(struct iss_device *iss)
{
omap4iss_csi2_cleanup(iss);
omap4iss_ipipeif_cleanup(iss);
omap4iss_ipipe_cleanup(iss);
omap4iss_resizer_cleanup(iss);
}
static int iss_initialize_modules(struct iss_device *iss)
{
int ret;
ret = omap4iss_csiphy_init(iss);
if (ret < 0) {
dev_err(iss->dev, "CSI PHY initialization failed\n");
goto error_csiphy;
}
ret = omap4iss_csi2_init(iss);
if (ret < 0) {
dev_err(iss->dev, "CSI2 initialization failed\n");
goto error_csi2;
}
ret = omap4iss_ipipeif_init(iss);
if (ret < 0) {
dev_err(iss->dev, "ISP IPIPEIF initialization failed\n");
goto error_ipipeif;
}
ret = omap4iss_ipipe_init(iss);
if (ret < 0) {
dev_err(iss->dev, "ISP IPIPE initialization failed\n");
goto error_ipipe;
}
ret = omap4iss_resizer_init(iss);
if (ret < 0) {
dev_err(iss->dev, "ISP RESIZER initialization failed\n");
goto error_resizer;
}
/* Connect the submodules. */
ret = media_entity_create_link(
&iss->csi2a.subdev.entity, CSI2_PAD_SOURCE,
&iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&iss->csi2b.subdev.entity, CSI2_PAD_SOURCE,
&iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
&iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
&iss->ipipe.subdev.entity, IPIPE_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&iss->ipipe.subdev.entity, IPIPE_PAD_SOURCE_VP,
&iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
if (ret < 0)
goto error_link;
return 0;
error_link:
omap4iss_resizer_cleanup(iss);
error_resizer:
omap4iss_ipipe_cleanup(iss);
error_ipipe:
omap4iss_ipipeif_cleanup(iss);
error_ipipeif:
omap4iss_csi2_cleanup(iss);
error_csi2:
error_csiphy:
return ret;
}
static int iss_probe(struct platform_device *pdev)
{
struct iss_platform_data *pdata = pdev->dev.platform_data;
struct iss_device *iss;
unsigned int i;
int ret;
if (pdata == NULL)
return -EINVAL;
iss = kzalloc(sizeof(*iss), GFP_KERNEL);
if (!iss) {
dev_err(&pdev->dev, "Could not allocate memory\n");
return -ENOMEM;
}
mutex_init(&iss->iss_mutex);
iss->dev = &pdev->dev;
iss->pdata = pdata;
iss->raw_dmamask = DMA_BIT_MASK(32);
iss->dev->dma_mask = &iss->raw_dmamask;
iss->dev->coherent_dma_mask = DMA_BIT_MASK(32);
platform_set_drvdata(pdev, iss);
/* Clocks */
ret = iss_map_mem_resource(pdev, iss, OMAP4_ISS_MEM_TOP);
if (ret < 0)
goto error;
ret = iss_get_clocks(iss);
if (ret < 0)
goto error;
if (omap4iss_get(iss) == NULL)
goto error;
ret = iss_reset(iss);
if (ret < 0)
goto error_iss;
iss->revision = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
dev_info(iss->dev, "Revision %08x found\n", iss->revision);
for (i = 1; i < OMAP4_ISS_MEM_LAST; i++) {
ret = iss_map_mem_resource(pdev, iss, i);
if (ret)
goto error_iss;
}
/* Configure BTE BW_LIMITER field to max recommended value (1 GB) */
iss_reg_update(iss, OMAP4_ISS_MEM_BTE, BTE_CTRL,
BTE_CTRL_BW_LIMITER_MASK,
18 << BTE_CTRL_BW_LIMITER_SHIFT);
/* Perform ISP reset */
ret = omap4iss_subclk_enable(iss, OMAP4_ISS_SUBCLK_ISP);
if (ret < 0)
goto error_iss;
ret = iss_isp_reset(iss);
if (ret < 0)
goto error_iss;
dev_info(iss->dev, "ISP Revision %08x found\n",
iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_REVISION));
/* Interrupt */
iss->irq_num = platform_get_irq(pdev, 0);
if (iss->irq_num <= 0) {
dev_err(iss->dev, "No IRQ resource\n");
ret = -ENODEV;
goto error_iss;
}
if (request_irq(iss->irq_num, iss_isr, IRQF_SHARED, "OMAP4 ISS", iss)) {
dev_err(iss->dev, "Unable to request IRQ\n");
ret = -EINVAL;
goto error_iss;
}
/* Entities */
ret = iss_initialize_modules(iss);
if (ret < 0)
goto error_irq;
ret = iss_register_entities(iss);
if (ret < 0)
goto error_modules;
omap4iss_put(iss);
return 0;
error_modules:
iss_cleanup_modules(iss);
error_irq:
free_irq(iss->irq_num, iss);
error_iss:
omap4iss_put(iss);
error:
iss_put_clocks(iss);
for (i = 0; i < OMAP4_ISS_MEM_LAST; i++) {
if (iss->regs[i]) {
iounmap(iss->regs[i]);
iss->regs[i] = NULL;
}
if (iss->res[i]) {
release_mem_region(iss->res[i]->start,
resource_size(iss->res[i]));
iss->res[i] = NULL;
}
}
platform_set_drvdata(pdev, NULL);
mutex_destroy(&iss->iss_mutex);
kfree(iss);
return ret;
}
static int iss_remove(struct platform_device *pdev)
{
struct iss_device *iss = platform_get_drvdata(pdev);
unsigned int i;
iss_unregister_entities(iss);
iss_cleanup_modules(iss);
free_irq(iss->irq_num, iss);
iss_put_clocks(iss);
for (i = 0; i < OMAP4_ISS_MEM_LAST; i++) {
if (iss->regs[i]) {
iounmap(iss->regs[i]);
iss->regs[i] = NULL;
}
if (iss->res[i]) {
release_mem_region(iss->res[i]->start,
resource_size(iss->res[i]));
iss->res[i] = NULL;
}
}
kfree(iss);
return 0;
}
static struct platform_device_id omap4iss_id_table[] = {
{ "omap4iss", 0 },
{ },
};
MODULE_DEVICE_TABLE(platform, omap4iss_id_table);
static struct platform_driver iss_driver = {
.probe = iss_probe,
.remove = iss_remove,
.id_table = omap4iss_id_table,
.driver = {
.owner = THIS_MODULE,
.name = "omap4iss",
},
};
module_platform_driver(iss_driver);
MODULE_DESCRIPTION("TI OMAP4 ISS driver");
MODULE_AUTHOR("Sergio Aguirre <sergio.a.aguirre@gmail.com>");
MODULE_LICENSE("GPL");
MODULE_VERSION(ISS_VIDEO_DRIVER_VERSION);
|