summaryrefslogtreecommitdiffstats
path: root/drivers/usb/dwc3/core.h
blob: e33cc10121be0c8ca94c65d9f3ff2ab12fd53c87 (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
/*
 * core.h - DesignWare USB3 DRD Core Header
 *
 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
 *
 * Authors: Felipe Balbi <balbi@ti.com>,
 *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2  of
 * the License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __DRIVERS_USB_DWC3_CORE_H
#define __DRIVERS_USB_DWC3_CORE_H

#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/bitops.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/debugfs.h>
#include <linux/wait.h>
#include <linux/workqueue.h>

#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/ulpi/interface.h>

#include <linux/phy/phy.h>

#define DWC3_MSG_MAX	500

/* Global constants */
#define DWC3_PULL_UP_TIMEOUT	500	/* ms */
#define DWC3_BOUNCE_SIZE	1024	/* size of a superspeed bulk */
#define DWC3_EP0_SETUP_SIZE	512
#define DWC3_ENDPOINTS_NUM	32
#define DWC3_XHCI_RESOURCES_NUM	2

#define DWC3_SCRATCHBUF_SIZE	4096	/* each buffer is assumed to be 4KiB */
#define DWC3_EVENT_BUFFERS_SIZE	4096
#define DWC3_EVENT_TYPE_MASK	0xfe

#define DWC3_EVENT_TYPE_DEV	0
#define DWC3_EVENT_TYPE_CARKIT	3
#define DWC3_EVENT_TYPE_I2C	4

#define DWC3_DEVICE_EVENT_DISCONNECT		0
#define DWC3_DEVICE_EVENT_RESET			1
#define DWC3_DEVICE_EVENT_CONNECT_DONE		2
#define DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE	3
#define DWC3_DEVICE_EVENT_WAKEUP		4
#define DWC3_DEVICE_EVENT_HIBER_REQ		5
#define DWC3_DEVICE_EVENT_EOPF			6
#define DWC3_DEVICE_EVENT_SOF			7
#define DWC3_DEVICE_EVENT_ERRATIC_ERROR		9
#define DWC3_DEVICE_EVENT_CMD_CMPL		10
#define DWC3_DEVICE_EVENT_OVERFLOW		11

#define DWC3_GEVNTCOUNT_MASK	0xfffc
#define DWC3_GEVNTCOUNT_EHB	BIT(31)
#define DWC3_GSNPSID_MASK	0xffff0000
#define DWC3_GSNPSREV_MASK	0xffff

/* DWC3 registers memory space boundries */
#define DWC3_XHCI_REGS_START		0x0
#define DWC3_XHCI_REGS_END		0x7fff
#define DWC3_GLOBALS_REGS_START		0xc100
#define DWC3_GLOBALS_REGS_END		0xc6ff
#define DWC3_DEVICE_REGS_START		0xc700
#define DWC3_DEVICE_REGS_END		0xcbff
#define DWC3_OTG_REGS_START		0xcc00
#define DWC3_OTG_REGS_END		0xccff

/* Global Registers */
#define DWC3_GSBUSCFG0		0xc100
#define DWC3_GSBUSCFG1		0xc104
#define DWC3_GTXTHRCFG		0xc108
#define DWC3_GRXTHRCFG		0xc10c
#define DWC3_GCTL		0xc110
#define DWC3_GEVTEN		0xc114
#define DWC3_GSTS		0xc118
#define DWC3_GUCTL1		0xc11c
#define DWC3_GSNPSID		0xc120
#define DWC3_GGPIO		0xc124
#define DWC3_GUID		0xc128
#define DWC3_GUCTL		0xc12c
#define DWC3_GBUSERRADDR0	0xc130
#define DWC3_GBUSERRADDR1	0xc134
#define DWC3_GPRTBIMAP0		0xc138
#define DWC3_GPRTBIMAP1		0xc13c
#define DWC3_GHWPARAMS0		0xc140
#define DWC3_GHWPARAMS1		0xc144
#define DWC3_GHWPARAMS2		0xc148
#define DWC3_GHWPARAMS3		0xc14c
#define DWC3_GHWPARAMS4		0xc150
#define DWC3_GHWPARAMS5		0xc154
#define DWC3_GHWPARAMS6		0xc158
#define DWC3_GHWPARAMS7		0xc15c
#define DWC3_GDBGFIFOSPACE	0xc160
#define DWC3_GDBGLTSSM		0xc164
#define DWC3_GPRTBIMAP_HS0	0xc180
#define DWC3_GPRTBIMAP_HS1	0xc184
#define DWC3_GPRTBIMAP_FS0	0xc188
#define DWC3_GPRTBIMAP_FS1	0xc18c
#define DWC3_GUCTL2		0xc19c

#define DWC3_VER_NUMBER		0xc1a0
#define DWC3_VER_TYPE		0xc1a4

#define DWC3_GUSB2PHYCFG(n)	(0xc200 + ((n) * 0x04))
#define DWC3_GUSB2I2CCTL(n)	(0xc240 + ((n) * 0x04))

#define DWC3_GUSB2PHYACC(n)	(0xc280 + ((n) * 0x04))

#define DWC3_GUSB3PIPECTL(n)	(0xc2c0 + ((n) * 0x04))

#define DWC3_GTXFIFOSIZ(n)	(0xc300 + ((n) * 0x04))
#define DWC3_GRXFIFOSIZ(n)	(0xc380 + ((n) * 0x04))

#define DWC3_GEVNTADRLO(n)	(0xc400 + ((n) * 0x10))
#define DWC3_GEVNTADRHI(n)	(0xc404 + ((n) * 0x10))
#define DWC3_GEVNTSIZ(n)	(0xc408 + ((n) * 0x10))
#define DWC3_GEVNTCOUNT(n)	(0xc40c + ((n) * 0x10))

#define DWC3_GHWPARAMS8		0xc600
#define DWC3_GFLADJ		0xc630

/* Device Registers */
#define DWC3_DCFG		0xc700
#define DWC3_DCTL		0xc704
#define DWC3_DEVTEN		0xc708
#define DWC3_DSTS		0xc70c
#define DWC3_DGCMDPAR		0xc710
#define DWC3_DGCMD		0xc714
#define DWC3_DALEPENA		0xc720

#define DWC3_DEP_BASE(n)	(0xc800 + ((n) * 0x10))
#define DWC3_DEPCMDPAR2		0x00
#define DWC3_DEPCMDPAR1		0x04
#define DWC3_DEPCMDPAR0		0x08
#define DWC3_DEPCMD		0x0c

#define DWC3_DEV_IMOD(n)	(0xca00 + ((n) * 0x4))

/* OTG Registers */
#define DWC3_OCFG		0xcc00
#define DWC3_OCTL		0xcc04
#define DWC3_OEVT		0xcc08
#define DWC3_OEVTEN		0xcc0C
#define DWC3_OSTS		0xcc10

/* Bit fields */

/* Global Debug Queue/FIFO Space Available Register */
#define DWC3_GDBGFIFOSPACE_NUM(n)	((n) & 0x1f)
#define DWC3_GDBGFIFOSPACE_TYPE(n)	(((n) << 5) & 0x1e0)
#define DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(n) (((n) >> 16) & 0xffff)

#define DWC3_TXFIFOQ		1
#define DWC3_RXFIFOQ		3
#define DWC3_TXREQQ		5
#define DWC3_RXREQQ		7
#define DWC3_RXINFOQ		9
#define DWC3_DESCFETCHQ		13
#define DWC3_EVENTQ		15

/* Global RX Threshold Configuration Register */
#define DWC3_GRXTHRCFG_MAXRXBURSTSIZE(n) (((n) & 0x1f) << 19)
#define DWC3_GRXTHRCFG_RXPKTCNT(n) (((n) & 0xf) << 24)
#define DWC3_GRXTHRCFG_PKTCNTSEL BIT(29)

/* Global Configuration Register */
#define DWC3_GCTL_PWRDNSCALE(n)	((n) << 19)
#define DWC3_GCTL_U2RSTECN	BIT(16)
#define DWC3_GCTL_RAMCLKSEL(x)	(((x) & DWC3_GCTL_CLK_MASK) << 6)
#define DWC3_GCTL_CLK_BUS	(0)
#define DWC3_GCTL_CLK_PIPE	(1)
#define DWC3_GCTL_CLK_PIPEHALF	(2)
#define DWC3_GCTL_CLK_MASK	(3)

#define DWC3_GCTL_PRTCAP(n)	(((n) & (3 << 12)) >> 12)
#define DWC3_GCTL_PRTCAPDIR(n)	((n) << 12)
#define DWC3_GCTL_PRTCAP_HOST	1
#define DWC3_GCTL_PRTCAP_DEVICE	2
#define DWC3_GCTL_PRTCAP_OTG	3

#define DWC3_GCTL_CORESOFTRESET		BIT(11)
#define DWC3_GCTL_SOFITPSYNC		BIT(10)
#define DWC3_GCTL_SCALEDOWN(n)		((n) << 4)
#define DWC3_GCTL_SCALEDOWN_MASK	DWC3_GCTL_SCALEDOWN(3)
#define DWC3_GCTL_DISSCRAMBLE		BIT(3)
#define DWC3_GCTL_U2EXIT_LFPS		BIT(2)
#define DWC3_GCTL_GBLHIBERNATIONEN	BIT(1)
#define DWC3_GCTL_DSBLCLKGTNG		BIT(0)

/* Global User Control 1 Register */
#define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS	BIT(28)
#define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW	BIT(24)

/* Global USB2 PHY Configuration Register */
#define DWC3_GUSB2PHYCFG_PHYSOFTRST	BIT(31)
#define DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS	BIT(30)
#define DWC3_GUSB2PHYCFG_SUSPHY		BIT(6)
#define DWC3_GUSB2PHYCFG_ULPI_UTMI	BIT(4)
#define DWC3_GUSB2PHYCFG_ENBLSLPM	BIT(8)
#define DWC3_GUSB2PHYCFG_PHYIF(n)	(n << 3)
#define DWC3_GUSB2PHYCFG_PHYIF_MASK	DWC3_GUSB2PHYCFG_PHYIF(1)
#define DWC3_GUSB2PHYCFG_USBTRDTIM(n)	(n << 10)
#define DWC3_GUSB2PHYCFG_USBTRDTIM_MASK	DWC3_GUSB2PHYCFG_USBTRDTIM(0xf)
#define USBTRDTIM_UTMI_8_BIT		9
#define USBTRDTIM_UTMI_16_BIT		5
#define UTMI_PHYIF_16_BIT		1
#define UTMI_PHYIF_8_BIT		0

/* Global USB2 PHY Vendor Control Register */
#define DWC3_GUSB2PHYACC_NEWREGREQ	BIT(25)
#define DWC3_GUSB2PHYACC_BUSY		BIT(23)
#define DWC3_GUSB2PHYACC_WRITE		BIT(22)
#define DWC3_GUSB2PHYACC_ADDR(n)	(n << 16)
#define DWC3_GUSB2PHYACC_EXTEND_ADDR(n)	(n << 8)
#define DWC3_GUSB2PHYACC_DATA(n)	(n & 0xff)

/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST	BIT(31)
#define DWC3_GUSB3PIPECTL_U2SSINP3OK	BIT(29)
#define DWC3_GUSB3PIPECTL_DISRXDETINP3	BIT(28)
#define DWC3_GUSB3PIPECTL_UX_EXIT_PX	BIT(27)
#define DWC3_GUSB3PIPECTL_REQP1P2P3	BIT(24)
#define DWC3_GUSB3PIPECTL_DEP1P2P3(n)	((n) << 19)
#define DWC3_GUSB3PIPECTL_DEP1P2P3_MASK	DWC3_GUSB3PIPECTL_DEP1P2P3(7)
#define DWC3_GUSB3PIPECTL_DEP1P2P3_EN	DWC3_GUSB3PIPECTL_DEP1P2P3(1)
#define DWC3_GUSB3PIPECTL_DEPOCHANGE	BIT(18)
#define DWC3_GUSB3PIPECTL_SUSPHY	BIT(17)
#define DWC3_GUSB3PIPECTL_LFPSFILT	BIT(9)
#define DWC3_GUSB3PIPECTL_RX_DETOPOLL	BIT(8)
#define DWC3_GUSB3PIPECTL_TX_DEEPH_MASK	DWC3_GUSB3PIPECTL_TX_DEEPH(3)
#define DWC3_GUSB3PIPECTL_TX_DEEPH(n)	((n) << 1)

/* Global TX Fifo Size Register */
#define DWC3_GTXFIFOSIZ_TXFDEF(n)	((n) & 0xffff)
#define DWC3_GTXFIFOSIZ_TXFSTADDR(n)	((n) & 0xffff0000)

/* Global Event Size Registers */
#define DWC3_GEVNTSIZ_INTMASK		BIT(31)
#define DWC3_GEVNTSIZ_SIZE(n)		((n) & 0xffff)

/* Global HWPARAMS0 Register */
#define DWC3_GHWPARAMS0_MODE(n)		((n) & 0x3)
#define DWC3_GHWPARAMS0_MODE_GADGET	0
#define DWC3_GHWPARAMS0_MODE_HOST	1
#define DWC3_GHWPARAMS0_MODE_DRD	2
#define DWC3_GHWPARAMS0_MBUS_TYPE(n)	(((n) >> 3) & 0x7)
#define DWC3_GHWPARAMS0_SBUS_TYPE(n)	(((n) >> 6) & 0x3)
#define DWC3_GHWPARAMS0_MDWIDTH(n)	(((n) >> 8) & 0xff)
#define DWC3_GHWPARAMS0_SDWIDTH(n)	(((n) >> 16) & 0xff)
#define DWC3_GHWPARAMS0_AWIDTH(n)	(((n) >> 24) & 0xff)

/* Global HWPARAMS1 Register */
#define DWC3_GHWPARAMS1_EN_PWROPT(n)	(((n) & (3 << 24)) >> 24)
#define DWC3_GHWPARAMS1_EN_PWROPT_NO	0
#define DWC3_GHWPARAMS1_EN_PWROPT_CLK	1
#define DWC3_GHWPARAMS1_EN_PWROPT_HIB	2
#define DWC3_GHWPARAMS1_PWROPT(n)	((n) << 24)
#define DWC3_GHWPARAMS1_PWROPT_MASK	DWC3_GHWPARAMS1_PWROPT(3)

/* Global HWPARAMS3 Register */
#define DWC3_GHWPARAMS3_SSPHY_IFC(n)		((n) & 3)
#define DWC3_GHWPARAMS3_SSPHY_IFC_DIS		0
#define DWC3_GHWPARAMS3_SSPHY_IFC_GEN1		1
#define DWC3_GHWPARAMS3_SSPHY_IFC_GEN2		2 /* DWC_usb31 only */
#define DWC3_GHWPARAMS3_HSPHY_IFC(n)		(((n) & (3 << 2)) >> 2)
#define DWC3_GHWPARAMS3_HSPHY_IFC_DIS		0
#define DWC3_GHWPARAMS3_HSPHY_IFC_UTMI		1
#define DWC3_GHWPARAMS3_HSPHY_IFC_ULPI		2
#define DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI	3
#define DWC3_GHWPARAMS3_FSPHY_IFC(n)		(((n) & (3 << 4)) >> 4)
#define DWC3_GHWPARAMS3_FSPHY_IFC_DIS		0
#define DWC3_GHWPARAMS3_FSPHY_IFC_ENA		1

/* Global HWPARAMS4 Register */
#define DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(n)	(((n) & (0x0f << 13)) >> 13)
#define DWC3_MAX_HIBER_SCRATCHBUFS		15

/* Global HWPARAMS6 Register */
#define DWC3_GHWPARAMS6_EN_FPGA			BIT(7)

/* Global HWPARAMS7 Register */
#define DWC3_GHWPARAMS7_RAM1_DEPTH(n)	((n) & 0xffff)
#define DWC3_GHWPARAMS7_RAM2_DEPTH(n)	(((n) >> 16) & 0xffff)

/* Global Frame Length Adjustment Register */
#define DWC3_GFLADJ_30MHZ_SDBND_SEL		BIT(7)
#define DWC3_GFLADJ_30MHZ_MASK			0x3f

/* Global User Control Register 2 */
#define DWC3_GUCTL2_RST_ACTBITLATER		BIT(14)

/* Device Configuration Register */
#define DWC3_DCFG_DEVADDR(addr)	((addr) << 3)
#define DWC3_DCFG_DEVADDR_MASK	DWC3_DCFG_DEVADDR(0x7f)

#define DWC3_DCFG_SPEED_MASK	(7 << 0)
#define DWC3_DCFG_SUPERSPEED_PLUS (5 << 0)  /* DWC_usb31 only */
#define DWC3_DCFG_SUPERSPEED	(4 << 0)
#define DWC3_DCFG_HIGHSPEED	(0 << 0)
#define DWC3_DCFG_FULLSPEED	BIT(0)
#define DWC3_DCFG_LOWSPEED	(2 << 0)

#define DWC3_DCFG_NUMP_SHIFT	17
#define DWC3_DCFG_NUMP(n)	(((n) >> DWC3_DCFG_NUMP_SHIFT) & 0x1f)
#define DWC3_DCFG_NUMP_MASK	(0x1f << DWC3_DCFG_NUMP_SHIFT)
#define DWC3_DCFG_LPM_CAP	BIT(22)

/* Device Control Register */
#define DWC3_DCTL_RUN_STOP	BIT(31)
#define DWC3_DCTL_CSFTRST	BIT(30)
#define DWC3_DCTL_LSFTRST	BIT(29)

#define DWC3_DCTL_HIRD_THRES_MASK	(0x1f << 24)
#define DWC3_DCTL_HIRD_THRES(n)	((n) << 24)

#define DWC3_DCTL_APPL1RES	BIT(23)

/* These apply for core versions 1.87a and earlier */
#define DWC3_DCTL_TRGTULST_MASK		(0x0f << 17)
#define DWC3_DCTL_TRGTULST(n)		((n) << 17)
#define DWC3_DCTL_TRGTULST_U2		(DWC3_DCTL_TRGTULST(2))
#define DWC3_DCTL_TRGTULST_U3		(DWC3_DCTL_TRGTULST(3))
#define DWC3_DCTL_TRGTULST_SS_DIS	(DWC3_DCTL_TRGTULST(4))
#define DWC3_DCTL_TRGTULST_RX_DET	(DWC3_DCTL_TRGTULST(5))
#define DWC3_DCTL_TRGTULST_SS_INACT	(DWC3_DCTL_TRGTULST(6))

/* These apply for core versions 1.94a and later */
#define DWC3_DCTL_LPM_ERRATA_MASK	DWC3_DCTL_LPM_ERRATA(0xf)
#define DWC3_DCTL_LPM_ERRATA(n)		((n) << 20)

#define DWC3_DCTL_KEEP_CONNECT		BIT(19)
#define DWC3_DCTL_L1_HIBER_EN		BIT(18)
#define DWC3_DCTL_CRS			BIT(17)
#define DWC3_DCTL_CSS			BIT(16)

#define DWC3_DCTL_INITU2ENA		BIT(12)
#define DWC3_DCTL_ACCEPTU2ENA		BIT(11)
#define DWC3_DCTL_INITU1ENA		BIT(10)
#define DWC3_DCTL_ACCEPTU1ENA		BIT(9)
#define DWC3_DCTL_TSTCTRL_MASK		(0xf << 1)

#define DWC3_DCTL_ULSTCHNGREQ_MASK	(0x0f << 5)
#define DWC3_DCTL_ULSTCHNGREQ(n) (((n) << 5) & DWC3_DCTL_ULSTCHNGREQ_MASK)

#define DWC3_DCTL_ULSTCHNG_NO_ACTION	(DWC3_DCTL_ULSTCHNGREQ(0))
#define DWC3_DCTL_ULSTCHNG_SS_DISABLED	(DWC3_DCTL_ULSTCHNGREQ(4))
#define DWC3_DCTL_ULSTCHNG_RX_DETECT	(DWC3_DCTL_ULSTCHNGREQ(5))
#define DWC3_DCTL_ULSTCHNG_SS_INACTIVE	(DWC3_DCTL_ULSTCHNGREQ(6))
#define DWC3_DCTL_ULSTCHNG_RECOVERY	(DWC3_DCTL_ULSTCHNGREQ(8))
#define DWC3_DCTL_ULSTCHNG_COMPLIANCE	(DWC3_DCTL_ULSTCHNGREQ(10))
#define DWC3_DCTL_ULSTCHNG_LOOPBACK	(DWC3_DCTL_ULSTCHNGREQ(11))

/* Device Event Enable Register */
#define DWC3_DEVTEN_VNDRDEVTSTRCVEDEN	BIT(12)
#define DWC3_DEVTEN_EVNTOVERFLOWEN	BIT(11)
#define DWC3_DEVTEN_CMDCMPLTEN		BIT(10)
#define DWC3_DEVTEN_ERRTICERREN		BIT(9)
#define DWC3_DEVTEN_SOFEN		BIT(7)
#define DWC3_DEVTEN_EOPFEN		BIT(6)
#define DWC3_DEVTEN_HIBERNATIONREQEVTEN	BIT(5)
#define DWC3_DEVTEN_WKUPEVTEN		BIT(4)
#define DWC3_DEVTEN_ULSTCNGEN		BIT(3)
#define DWC3_DEVTEN_CONNECTDONEEN	BIT(2)
#define DWC3_DEVTEN_USBRSTEN		BIT(1)
#define DWC3_DEVTEN_DISCONNEVTEN	BIT(0)

/* Device Status Register */
#define DWC3_DSTS_DCNRD			BIT(29)

/* This applies for core versions 1.87a and earlier */
#define DWC3_DSTS_PWRUPREQ		BIT(24)

/* These apply for core versions 1.94a and later */
#define DWC3_DSTS_RSS			BIT(25)
#define DWC3_DSTS_SSS			BIT(24)

#define DWC3_DSTS_COREIDLE		BIT(23)
#define DWC3_DSTS_DEVCTRLHLT		BIT(22)

#define DWC3_DSTS_USBLNKST_MASK		(0x0f << 18)
#define DWC3_DSTS_USBLNKST(n)		(((n) & DWC3_DSTS_USBLNKST_MASK) >> 18)

#define DWC3_DSTS_RXFIFOEMPTY		BIT(17)

#define DWC3_DSTS_SOFFN_MASK		(0x3fff << 3)
#define DWC3_DSTS_SOFFN(n)		(((n) & DWC3_DSTS_SOFFN_MASK) >> 3)

#define DWC3_DSTS_CONNECTSPD		(7 << 0)

#define DWC3_DSTS_SUPERSPEED_PLUS	(5 << 0) /* DWC_usb31 only */
#define DWC3_DSTS_SUPERSPEED		(4 << 0)
#define DWC3_DSTS_HIGHSPEED		(0 << 0)
#define DWC3_DSTS_FULLSPEED		BIT(0)
#define DWC3_DSTS_LOWSPEED		(2 << 0)

/* Device Generic Command Register */
#define DWC3_DGCMD_SET_LMP		0x01
#define DWC3_DGCMD_SET_PERIODIC_PAR	0x02
#define DWC3_DGCMD_XMIT_FUNCTION	0x03

/* These apply for core versions 1.94a and later */
#define DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO	0x04
#define DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI	0x05

#define DWC3_DGCMD_SELECTED_FIFO_FLUSH	0x09
#define DWC3_DGCMD_ALL_FIFO_FLUSH	0x0a
#define DWC3_DGCMD_SET_ENDPOINT_NRDY	0x0c
#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK	0x10

#define DWC3_DGCMD_STATUS(n)		(((n) >> 12) & 0x0F)
#define DWC3_DGCMD_CMDACT		BIT(10)
#define DWC3_DGCMD_CMDIOC		BIT(8)

/* Device Generic Command Parameter Register */
#define DWC3_DGCMDPAR_FORCE_LINKPM_ACCEPT	BIT(0)
#define DWC3_DGCMDPAR_FIFO_NUM(n)		((n) << 0)
#define DWC3_DGCMDPAR_RX_FIFO			(0 << 5)
#define DWC3_DGCMDPAR_TX_FIFO			BIT(5)
#define DWC3_DGCMDPAR_LOOPBACK_DIS		(0 << 0)
#define DWC3_DGCMDPAR_LOOPBACK_ENA		BIT(0)

/* Device Endpoint Command Register */
#define DWC3_DEPCMD_PARAM_SHIFT		16
#define DWC3_DEPCMD_PARAM(x)		((x) << DWC3_DEPCMD_PARAM_SHIFT)
#define DWC3_DEPCMD_GET_RSC_IDX(x)	(((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
#define DWC3_DEPCMD_STATUS(x)		(((x) >> 12) & 0x0F)
#define DWC3_DEPCMD_HIPRI_FORCERM	BIT(11)
#define DWC3_DEPCMD_CLEARPENDIN		BIT(11)
#define DWC3_DEPCMD_CMDACT		BIT(10)
#define DWC3_DEPCMD_CMDIOC		BIT(8)

#define DWC3_DEPCMD_DEPSTARTCFG		(0x09 << 0)
#define DWC3_DEPCMD_ENDTRANSFER		(0x08 << 0)
#define DWC3_DEPCMD_UPDATETRANSFER	(0x07 << 0)
#define DWC3_DEPCMD_STARTTRANSFER	(0x06 << 0)
#define DWC3_DEPCMD_CLEARSTALL		(0x05 << 0)
#define DWC3_DEPCMD_SETSTALL		(0x04 << 0)
/* This applies for core versions 1.90a and earlier */
#define DWC3_DEPCMD_GETSEQNUMBER	(0x03 << 0)
/* This applies for core versions 1.94a and later */
#define DWC3_DEPCMD_GETEPSTATE		(0x03 << 0)
#define DWC3_DEPCMD_SETTRANSFRESOURCE	(0x02 << 0)
#define DWC3_DEPCMD_SETEPCONFIG		(0x01 << 0)

#define DWC3_DEPCMD_CMD(x)		((x) & 0xf)

/* The EP number goes 0..31 so ep0 is always out and ep1 is always in */
#define DWC3_DALEPENA_EP(n)		BIT(n)

#define DWC3_DEPCMD_TYPE_CONTROL	0
#define DWC3_DEPCMD_TYPE_ISOC		1
#define DWC3_DEPCMD_TYPE_BULK		2
#define DWC3_DEPCMD_TYPE_INTR		3

#define DWC3_DEV_IMOD_COUNT_SHIFT	16
#define DWC3_DEV_IMOD_COUNT_MASK	(0xffff << 16)
#define DWC3_DEV_IMOD_INTERVAL_SHIFT	0
#define DWC3_DEV_IMOD_INTERVAL_MASK	(0xffff << 0)

/* Structures */

struct dwc3_trb;

/**
 * struct dwc3_event_buffer - Software event buffer representation
 * @buf: _THE_ buffer
 * @cache: The buffer cache used in the threaded interrupt
 * @length: size of this buffer
 * @lpos: event offset
 * @count: cache of last read event count register
 * @flags: flags related to this event buffer
 * @dma: dma_addr_t
 * @dwc: pointer to DWC controller
 */
struct dwc3_event_buffer {
	void			*buf;
	void			*cache;
	unsigned		length;
	unsigned int		lpos;
	unsigned int		count;
	unsigned int		flags;

#define DWC3_EVENT_PENDING	BIT(0)

	dma_addr_t		dma;

	struct dwc3		*dwc;
};

#define DWC3_EP_FLAG_STALLED	BIT(0)
#define DWC3_EP_FLAG_WEDGED	BIT(1)

#define DWC3_EP_DIRECTION_TX	true
#define DWC3_EP_DIRECTION_RX	false

#define DWC3_TRB_NUM		256

/**
 * struct dwc3_ep - device side endpoint representation
 * @endpoint: usb endpoint
 * @pending_list: list of pending requests for this endpoint
 * @started_list: list of started requests on this endpoint
 * @wait_end_transfer: wait_queue_head_t for waiting on End Transfer complete
 * @lock: spinlock for endpoint request queue traversal
 * @regs: pointer to first endpoint register
 * @trb_pool: array of transaction buffers
 * @trb_pool_dma: dma address of @trb_pool
 * @trb_enqueue: enqueue 'pointer' into TRB array
 * @trb_dequeue: dequeue 'pointer' into TRB array
 * @dwc: pointer to DWC controller
 * @saved_state: ep state saved during hibernation
 * @flags: endpoint flags (wedged, stalled, ...)
 * @number: endpoint number (1 - 15)
 * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
 * @resource_index: Resource transfer index
 * @frame_number: set to the frame number we want this transfer to start (ISOC)
 * @interval: the interval on which the ISOC transfer is started
 * @allocated_requests: number of requests allocated
 * @queued_requests: number of requests queued for transfer
 * @name: a human readable name e.g. ep1out-bulk
 * @direction: true for TX, false for RX
 * @stream_capable: true when streams are enabled
 */
struct dwc3_ep {
	struct usb_ep		endpoint;
	struct list_head	pending_list;
	struct list_head	started_list;

	wait_queue_head_t	wait_end_transfer;

	spinlock_t		lock;
	void __iomem		*regs;

	struct dwc3_trb		*trb_pool;
	dma_addr_t		trb_pool_dma;
	struct dwc3		*dwc;

	u32			saved_state;
	unsigned		flags;
#define DWC3_EP_ENABLED		BIT(0)
#define DWC3_EP_STALL		BIT(1)
#define DWC3_EP_WEDGE		BIT(2)
#define DWC3_EP_BUSY		BIT(4)
#define DWC3_EP_PENDING_REQUEST	BIT(5)
#define DWC3_EP_MISSED_ISOC	BIT(6)
#define DWC3_EP_END_TRANSFER_PENDING	BIT(7)
#define DWC3_EP_TRANSFER_STARTED BIT(8)

	/* This last one is specific to EP0 */
#define DWC3_EP0_DIR_IN		BIT(31)

	/*
	 * IMPORTANT: we *know* we have 256 TRBs in our @trb_pool, so we will
	 * use a u8 type here. If anybody decides to increase number of TRBs to
	 * anything larger than 256 - I can't see why people would want to do
	 * this though - then this type needs to be changed.
	 *
	 * By using u8 types we ensure that our % operator when incrementing
	 * enqueue and dequeue get optimized away by the compiler.
	 */
	u8			trb_enqueue;
	u8			trb_dequeue;

	u8			number;
	u8			type;
	u8			resource_index;
	u32			allocated_requests;
	u32			queued_requests;
	u32			frame_number;
	u32			interval;

	char			name[20];

	unsigned		direction:1;
	unsigned		stream_capable:1;
};

enum dwc3_phy {
	DWC3_PHY_UNKNOWN = 0,
	DWC3_PHY_USB3,
	DWC3_PHY_USB2,
};

enum dwc3_ep0_next {
	DWC3_EP0_UNKNOWN = 0,
	DWC3_EP0_COMPLETE,
	DWC3_EP0_NRDY_DATA,
	DWC3_EP0_NRDY_STATUS,
};

enum dwc3_ep0_state {
	EP0_UNCONNECTED		= 0,
	EP0_SETUP_PHASE,
	EP0_DATA_PHASE,
	EP0_STATUS_PHASE,
};

enum dwc3_link_state {
	/* In SuperSpeed */
	DWC3_LINK_STATE_U0		= 0x00, /* in HS, means ON */
	DWC3_LINK_STATE_U1		= 0x01,
	DWC3_LINK_STATE_U2		= 0x02, /* in HS, means SLEEP */
	DWC3_LINK_STATE_U3		= 0x03, /* in HS, means SUSPEND */
	DWC3_LINK_STATE_SS_DIS		= 0x04,
	DWC3_LINK_STATE_RX_DET		= 0x05, /* in HS, means Early Suspend */
	DWC3_LINK_STATE_SS_INACT	= 0x06,
	DWC3_LINK_STATE_POLL		= 0x07,
	DWC3_LINK_STATE_RECOV		= 0x08,
	DWC3_LINK_STATE_HRESET		= 0x09,
	DWC3_LINK_STATE_CMPLY		= 0x0a,
	DWC3_LINK_STATE_LPBK		= 0x0b,
	DWC3_LINK_STATE_RESET		= 0x0e,
	DWC3_LINK_STATE_RESUME		= 0x0f,
	DWC3_LINK_STATE_MASK		= 0x0f,
};

/* TRB Length, PCM and Status */
#define DWC3_TRB_SIZE_MASK	(0x00ffffff)
#define DWC3_TRB_SIZE_LENGTH(n)	((n) & DWC3_TRB_SIZE_MASK)
#define DWC3_TRB_SIZE_PCM1(n)	(((n) & 0x03) << 24)
#define DWC3_TRB_SIZE_TRBSTS(n)	(((n) & (0x0f << 28)) >> 28)

#define DWC3_TRBSTS_OK			0
#define DWC3_TRBSTS_MISSED_ISOC		1
#define DWC3_TRBSTS_SETUP_PENDING	2
#define DWC3_TRB_STS_XFER_IN_PROG	4

/* TRB Control */
#define DWC3_TRB_CTRL_HWO		BIT(0)
#define DWC3_TRB_CTRL_LST		BIT(1)
#define DWC3_TRB_CTRL_CHN		BIT(2)
#define DWC3_TRB_CTRL_CSP		BIT(3)
#define DWC3_TRB_CTRL_TRBCTL(n)		(((n) & 0x3f) << 4)
#define DWC3_TRB_CTRL_ISP_IMI		BIT(10)
#define DWC3_TRB_CTRL_IOC		BIT(11)
#define DWC3_TRB_CTRL_SID_SOFN(n)	(((n) & 0xffff) << 14)

#define DWC3_TRBCTL_TYPE(n)		((n) & (0x3f << 4))
#define DWC3_TRBCTL_NORMAL		DWC3_TRB_CTRL_TRBCTL(1)
#define DWC3_TRBCTL_CONTROL_SETUP	DWC3_TRB_CTRL_TRBCTL(2)
#define DWC3_TRBCTL_CONTROL_STATUS2	DWC3_TRB_CTRL_TRBCTL(3)
#define DWC3_TRBCTL_CONTROL_STATUS3	DWC3_TRB_CTRL_TRBCTL(4)
#define DWC3_TRBCTL_CONTROL_DATA	DWC3_TRB_CTRL_TRBCTL(5)
#define DWC3_TRBCTL_ISOCHRONOUS_FIRST	DWC3_TRB_CTRL_TRBCTL(6)
#define DWC3_TRBCTL_ISOCHRONOUS		DWC3_TRB_CTRL_TRBCTL(7)
#define DWC3_TRBCTL_LINK_TRB		DWC3_TRB_CTRL_TRBCTL(8)

/**
 * struct dwc3_trb - transfer request block (hw format)
 * @bpl: DW0-3
 * @bph: DW4-7
 * @size: DW8-B
 * @ctrl: DWC-F
 */
struct dwc3_trb {
	u32		bpl;
	u32		bph;
	u32		size;
	u32		ctrl;
} __packed;

/**
 * struct dwc3_hwparams - copy of HWPARAMS registers
 * @hwparams0: GHWPARAMS0
 * @hwparams1: GHWPARAMS1
 * @hwparams2: GHWPARAMS2
 * @hwparams3: GHWPARAMS3
 * @hwparams4: GHWPARAMS4
 * @hwparams5: GHWPARAMS5
 * @hwparams6: GHWPARAMS6
 * @hwparams7: GHWPARAMS7
 * @hwparams8: GHWPARAMS8
 */
struct dwc3_hwparams {
	u32	hwparams0;
	u32	hwparams1;
	u32	hwparams2;
	u32	hwparams3;
	u32	hwparams4;
	u32	hwparams5;
	u32	hwparams6;
	u32	hwparams7;
	u32	hwparams8;
};

/* HWPARAMS0 */
#define DWC3_MODE(n)		((n) & 0x7)

#define DWC3_MDWIDTH(n)		(((n) & 0xff00) >> 8)

/* HWPARAMS1 */
#define DWC3_NUM_INT(n)		(((n) & (0x3f << 15)) >> 15)

/* HWPARAMS3 */
#define DWC3_NUM_IN_EPS_MASK	(0x1f << 18)
#define DWC3_NUM_EPS_MASK	(0x3f << 12)
#define DWC3_NUM_EPS(p)		(((p)->hwparams3 &		\
			(DWC3_NUM_EPS_MASK)) >> 12)
#define DWC3_NUM_IN_EPS(p)	(((p)->hwparams3 &		\
			(DWC3_NUM_IN_EPS_MASK)) >> 18)

/* HWPARAMS7 */
#define DWC3_RAM1_DEPTH(n)	((n) & 0xffff)

/**
 * struct dwc3_request - representation of a transfer request
 * @request: struct usb_request to be transferred
 * @list: a list_head used for request queueing
 * @dep: struct dwc3_ep owning this request
 * @sg: pointer to first incomplete sg
 * @num_pending_sgs: counter to pending sgs
 * @remaining: amount of data remaining
 * @epnum: endpoint number to which this request refers
 * @trb: pointer to struct dwc3_trb
 * @trb_dma: DMA address of @trb
 * @unaligned: true for OUT endpoints with length not divisible by maxp
 * @direction: IN or OUT direction flag
 * @mapped: true when request has been dma-mapped
 * @started: request is started
 * @zero: wants a ZLP
 */
struct dwc3_request {
	struct usb_request	request;
	struct list_head	list;
	struct dwc3_ep		*dep;
	struct scatterlist	*sg;

	unsigned		num_pending_sgs;
	unsigned		remaining;
	u8			epnum;
	struct dwc3_trb		*trb;
	dma_addr_t		trb_dma;

	unsigned		unaligned:1;
	unsigned		direction:1;
	unsigned		mapped:1;
	unsigned		started:1;
	unsigned		zero:1;
};

/*
 * struct dwc3_scratchpad_array - hibernation scratchpad array
 * (format defined by hw)
 */
struct dwc3_scratchpad_array {
	__le64	dma_adr[DWC3_MAX_HIBER_SCRATCHBUFS];
};

/**
 * struct dwc3 - representation of our controller
 * @drd_work: workqueue used for role swapping
 * @ep0_trb: trb which is used for the ctrl_req
 * @bounce: address of bounce buffer
 * @scratchbuf: address of scratch buffer
 * @setup_buf: used while precessing STD USB requests
 * @ep0_trb_addr: dma address of @ep0_trb
 * @bounce_addr: dma address of @bounce
 * @ep0_usb_req: dummy req used while handling STD USB requests
 * @scratch_addr: dma address of scratchbuf
 * @ep0_in_setup: one control transfer is completed and enter setup phase
 * @lock: for synchronizing
 * @dev: pointer to our struct device
 * @sysdev: pointer to the DMA-capable device
 * @xhci: pointer to our xHCI child
 * @xhci_resources: struct resources for our @xhci child
 * @ev_buf: struct dwc3_event_buffer pointer
 * @eps: endpoint array
 * @gadget: device side representation of the peripheral controller
 * @gadget_driver: pointer to the gadget driver
 * @regs: base address for our registers
 * @regs_size: address space size
 * @fladj: frame length adjustment
 * @irq_gadget: peripheral controller's IRQ number
 * @nr_scratch: number of scratch buffers
 * @u1u2: only used on revisions <1.83a for workaround
 * @maximum_speed: maximum speed requested (mainly for testing purposes)
 * @revision: revision register contents
 * @dr_mode: requested mode of operation
 * @current_dr_role: current role of operation when in dual-role mode
 * @desired_dr_role: desired role of operation when in dual-role mode
 * @edev: extcon handle
 * @edev_nb: extcon notifier
 * @hsphy_mode: UTMI phy mode, one of following:
 *		- USBPHY_INTERFACE_MODE_UTMI
 *		- USBPHY_INTERFACE_MODE_UTMIW
 * @usb2_phy: pointer to USB2 PHY
 * @usb3_phy: pointer to USB3 PHY
 * @usb2_generic_phy: pointer to USB2 PHY
 * @usb3_generic_phy: pointer to USB3 PHY
 * @ulpi: pointer to ulpi interface
 * @isoch_delay: wValue from Set Isochronous Delay request;
 * @u2sel: parameter from Set SEL request.
 * @u2pel: parameter from Set SEL request.
 * @u1sel: parameter from Set SEL request.
 * @u1pel: parameter from Set SEL request.
 * @num_eps: number of endpoints
 * @ep0_next_event: hold the next expected event
 * @ep0state: state of endpoint zero
 * @link_state: link state
 * @speed: device speed (super, high, full, low)
 * @hwparams: copy of hwparams registers
 * @root: debugfs root folder pointer
 * @regset: debugfs pointer to regdump file
 * @test_mode: true when we're entering a USB test mode
 * @test_mode_nr: test feature selector
 * @lpm_nyet_threshold: LPM NYET response threshold
 * @hird_threshold: HIRD threshold
 * @hsphy_interface: "utmi" or "ulpi"
 * @connected: true when we're connected to a host, false otherwise
 * @delayed_status: true when gadget driver asks for delayed status
 * @ep0_bounced: true when we used bounce buffer
 * @ep0_expect_in: true when we expect a DATA IN transfer
 * @has_hibernation: true when dwc3 was configured with Hibernation
 * @sysdev_is_parent: true when dwc3 device has a parent driver
 * @has_lpm_erratum: true when core was configured with LPM Erratum. Note that
 *			there's now way for software to detect this in runtime.
 * @is_utmi_l1_suspend: the core asserts output signal
 * 	0	- utmi_sleep_n
 * 	1	- utmi_l1_suspend_n
 * @is_fpga: true when we are using the FPGA board
 * @pending_events: true when we have pending IRQs to be handled
 * @pullups_connected: true when Run/Stop bit is set
 * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
 * @three_stage_setup: set if we perform a three phase setup
 * @usb3_lpm_capable: set if hadrware supports Link Power Management
 * @disable_scramble_quirk: set if we enable the disable scramble quirk
 * @u2exit_lfps_quirk: set if we enable u2exit lfps quirk
 * @u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk
 * @req_p1p2p3_quirk: set if we enable request p1p2p3 quirk
 * @del_p1p2p3_quirk: set if we enable delay p1p2p3 quirk
 * @del_phy_power_chg_quirk: set if we enable delay phy power change quirk
 * @lfps_filter_quirk: set if we enable LFPS filter quirk
 * @rx_detect_poll_quirk: set if we enable rx_detect to polling lfps quirk
 * @dis_u3_susphy_quirk: set if we disable usb3 suspend phy
 * @dis_u2_susphy_quirk: set if we disable usb2 suspend phy
 * @dis_enblslpm_quirk: set if we clear enblslpm in GUSB2PHYCFG,
 *                      disabling the suspend signal to the PHY.
 * @dis_rxdet_inp3_quirk: set if we disable Rx.Detect in P3
 * @dis_u2_freeclk_exists_quirk : set if we clear u2_freeclk_exists
 *			in GUSB2PHYCFG, specify that USB2 PHY doesn't
 *			provide a free-running PHY clock.
 * @dis_del_phy_power_chg_quirk: set if we disable delay phy power
 *			change quirk.
 * @dis_tx_ipgap_linecheck_quirk: set if we disable u2mac linestate
 *			check during HS transmit.
 * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
 * @tx_de_emphasis: Tx de-emphasis value
 * 	0	- -6dB de-emphasis
 * 	1	- -3.5dB de-emphasis
 * 	2	- No de-emphasis
 * 	3	- Reserved
 * @imod_interval: set the interrupt moderation interval in 250ns
 *                 increments or 0 to disable.
 */
struct dwc3 {
	struct work_struct	drd_work;
	struct dwc3_trb		*ep0_trb;
	void			*bounce;
	void			*scratchbuf;
	u8			*setup_buf;
	dma_addr_t		ep0_trb_addr;
	dma_addr_t		bounce_addr;
	dma_addr_t		scratch_addr;
	struct dwc3_request	ep0_usb_req;
	struct completion	ep0_in_setup;

	/* device lock */
	spinlock_t		lock;

	struct device		*dev;
	struct device		*sysdev;

	struct platform_device	*xhci;
	struct resource		xhci_resources[DWC3_XHCI_RESOURCES_NUM];

	struct dwc3_event_buffer *ev_buf;
	struct dwc3_ep		*eps[DWC3_ENDPOINTS_NUM];

	struct usb_gadget	gadget;
	struct usb_gadget_driver *gadget_driver;

	struct usb_phy		*usb2_phy;
	struct usb_phy		*usb3_phy;

	struct phy		*usb2_generic_phy;
	struct phy		*usb3_generic_phy;

	struct ulpi		*ulpi;

	void __iomem		*regs;
	size_t			regs_size;

	enum usb_dr_mode	dr_mode;
	u32			current_dr_role;
	u32			desired_dr_role;
	struct extcon_dev	*edev;
	struct notifier_block	edev_nb;
	enum usb_phy_interface	hsphy_mode;

	u32			fladj;
	u32			irq_gadget;
	u32			nr_scratch;
	u32			u1u2;
	u32			maximum_speed;

	/*
	 * All 3.1 IP version constants are greater than the 3.0 IP
	 * version constants. This works for most version checks in
	 * dwc3. However, in the future, this may not apply as
	 * features may be developed on newer versions of the 3.0 IP
	 * that are not in the 3.1 IP.
	 */
	u32			revision;

#define DWC3_REVISION_173A	0x5533173a
#define DWC3_REVISION_175A	0x5533175a
#define DWC3_REVISION_180A	0x5533180a
#define DWC3_REVISION_183A	0x5533183a
#define DWC3_REVISION_185A	0x5533185a
#define DWC3_REVISION_187A	0x5533187a
#define DWC3_REVISION_188A	0x5533188a
#define DWC3_REVISION_190A	0x5533190a
#define DWC3_REVISION_194A	0x5533194a
#define DWC3_REVISION_200A	0x5533200a
#define DWC3_REVISION_202A	0x5533202a
#define DWC3_REVISION_210A	0x5533210a
#define DWC3_REVISION_220A	0x5533220a
#define DWC3_REVISION_230A	0x5533230a
#define DWC3_REVISION_240A	0x5533240a
#define DWC3_REVISION_250A	0x5533250a
#define DWC3_REVISION_260A	0x5533260a
#define DWC3_REVISION_270A	0x5533270a
#define DWC3_REVISION_280A	0x5533280a
#define DWC3_REVISION_290A	0x5533290a
#define DWC3_REVISION_300A	0x5533300a
#define DWC3_REVISION_310A	0x5533310a

/*
 * NOTICE: we're using bit 31 as a "is usb 3.1" flag. This is really
 * just so dwc31 revisions are always larger than dwc3.
 */
#define DWC3_REVISION_IS_DWC31		0x80000000
#define DWC3_USB31_REVISION_110A	(0x3131302a | DWC3_REVISION_IS_DWC31)
#define DWC3_USB31_REVISION_120A	(0x3132302a | DWC3_REVISION_IS_DWC31)

	enum dwc3_ep0_next	ep0_next_event;
	enum dwc3_ep0_state	ep0state;
	enum dwc3_link_state	link_state;

	u16			isoch_delay;
	u16			u2sel;
	u16			u2pel;
	u8			u1sel;
	u8			u1pel;

	u8			speed;

	u8			num_eps;

	struct dwc3_hwparams	hwparams;
	struct dentry		*root;
	struct debugfs_regset32	*regset;

	u8			test_mode;
	u8			test_mode_nr;
	u8			lpm_nyet_threshold;
	u8			hird_threshold;

	const char		*hsphy_interface;

	unsigned		connected:1;
	unsigned		delayed_status:1;
	unsigned		ep0_bounced:1;
	unsigned		ep0_expect_in:1;
	unsigned		has_hibernation:1;
	unsigned		sysdev_is_parent:1;
	unsigned		has_lpm_erratum:1;
	unsigned		is_utmi_l1_suspend:1;
	unsigned		is_fpga:1;
	unsigned		pending_events:1;
	unsigned		pullups_connected:1;
	unsigned		setup_packet_pending:1;
	unsigned		three_stage_setup:1;
	unsigned		usb3_lpm_capable:1;

	unsigned		disable_scramble_quirk:1;
	unsigned		u2exit_lfps_quirk:1;
	unsigned		u2ss_inp3_quirk:1;
	unsigned		req_p1p2p3_quirk:1;
	unsigned                del_p1p2p3_quirk:1;
	unsigned		del_phy_power_chg_quirk:1;
	unsigned		lfps_filter_quirk:1;
	unsigned		rx_detect_poll_quirk:1;
	unsigned		dis_u3_susphy_quirk:1;
	unsigned		dis_u2_susphy_quirk:1;
	unsigned		dis_enblslpm_quirk:1;
	unsigned		dis_rxdet_inp3_quirk:1;
	unsigned		dis_u2_freeclk_exists_quirk:1;
	unsigned		dis_del_phy_power_chg_quirk:1;
	unsigned		dis_tx_ipgap_linecheck_quirk:1;

	unsigned		tx_de_emphasis_quirk:1;
	unsigned		tx_de_emphasis:2;

	u16			imod_interval;
};

#define work_to_dwc(w)		(container_of((w), struct dwc3, drd_work))

/* -------------------------------------------------------------------------- */

struct dwc3_event_type {
	u32	is_devspec:1;
	u32	type:7;
	u32	reserved8_31:24;
} __packed;

#define DWC3_DEPEVT_XFERCOMPLETE	0x01
#define DWC3_DEPEVT_XFERINPROGRESS	0x02
#define DWC3_DEPEVT_XFERNOTREADY	0x03
#define DWC3_DEPEVT_RXTXFIFOEVT		0x04
#define DWC3_DEPEVT_STREAMEVT		0x06
#define DWC3_DEPEVT_EPCMDCMPLT		0x07

/**
 * struct dwc3_event_depvt - Device Endpoint Events
 * @one_bit: indicates this is an endpoint event (not used)
 * @endpoint_number: number of the endpoint
 * @endpoint_event: The event we have:
 *	0x00	- Reserved
 *	0x01	- XferComplete
 *	0x02	- XferInProgress
 *	0x03	- XferNotReady
 *	0x04	- RxTxFifoEvt (IN->Underrun, OUT->Overrun)
 *	0x05	- Reserved
 *	0x06	- StreamEvt
 *	0x07	- EPCmdCmplt
 * @reserved11_10: Reserved, don't use.
 * @status: Indicates the status of the event. Refer to databook for
 *	more information.
 * @parameters: Parameters of the current event. Refer to databook for
 *	more information.
 */
struct dwc3_event_depevt {
	u32	one_bit:1;
	u32	endpoint_number:5;
	u32	endpoint_event:4;
	u32	reserved11_10:2;
	u32	status:4;

/* Within XferNotReady */
#define DEPEVT_STATUS_TRANSFER_ACTIVE	BIT(3)

/* Within XferComplete */
#define DEPEVT_STATUS_BUSERR	BIT(0)
#define DEPEVT_STATUS_SHORT	BIT(1)
#define DEPEVT_STATUS_IOC	BIT(2)
#define DEPEVT_STATUS_LST	BIT(3)

/* Stream event only */
#define DEPEVT_STREAMEVT_FOUND		1
#define DEPEVT_STREAMEVT_NOTFOUND	2

/* Control-only Status */
#define DEPEVT_STATUS_CONTROL_DATA	1
#define DEPEVT_STATUS_CONTROL_STATUS	2
#define DEPEVT_STATUS_CONTROL_PHASE(n)	((n) & 3)

/* In response to Start Transfer */
#define DEPEVT_TRANSFER_NO_RESOURCE	1
#define DEPEVT_TRANSFER_BUS_EXPIRY	2

	u32	parameters:16;

/* For Command Complete Events */
#define DEPEVT_PARAMETER_CMD(n)	(((n) & (0xf << 8)) >> 8)
} __packed;

/**
 * struct dwc3_event_devt - Device Events
 * @one_bit: indicates this is a non-endpoint event (not used)
 * @device_event: indicates it's a device event. Should read as 0x00
 * @type: indicates the type of device event.
 *	0	- DisconnEvt
 *	1	- USBRst
 *	2	- ConnectDone
 *	3	- ULStChng
 *	4	- WkUpEvt
 *	5	- Reserved
 *	6	- EOPF
 *	7	- SOF
 *	8	- Reserved
 *	9	- ErrticErr
 *	10	- CmdCmplt
 *	11	- EvntOverflow
 *	12	- VndrDevTstRcved
 * @reserved15_12: Reserved, not used
 * @event_info: Information about this event
 * @reserved31_25: Reserved, not used
 */
struct dwc3_event_devt {
	u32	one_bit:1;
	u32	device_event:7;
	u32	type:4;
	u32	reserved15_12:4;
	u32	event_info:9;
	u32	reserved31_25:7;
} __packed;

/**
 * struct dwc3_event_gevt - Other Core Events
 * @one_bit: indicates this is a non-endpoint event (not used)
 * @device_event: indicates it's (0x03) Carkit or (0x04) I2C event.
 * @phy_port_number: self-explanatory
 * @reserved31_12: Reserved, not used.
 */
struct dwc3_event_gevt {
	u32	one_bit:1;
	u32	device_event:7;
	u32	phy_port_number:4;
	u32	reserved31_12:20;
} __packed;

/**
 * union dwc3_event - representation of Event Buffer contents
 * @raw: raw 32-bit event
 * @type: the type of the event
 * @depevt: Device Endpoint Event
 * @devt: Device Event
 * @gevt: Global Event
 */
union dwc3_event {
	u32				raw;
	struct dwc3_event_type		type;
	struct dwc3_event_depevt	depevt;
	struct dwc3_event_devt		devt;
	struct dwc3_event_gevt		gevt;
};

/**
 * struct dwc3_gadget_ep_cmd_params - representation of endpoint command
 * parameters
 * @param2: third parameter
 * @param1: second parameter
 * @param0: first parameter
 */
struct dwc3_gadget_ep_cmd_params {
	u32	param2;
	u32	param1;
	u32	param0;
};

/*
 * DWC3 Features to be used as Driver Data
 */

#define DWC3_HAS_PERIPHERAL		BIT(0)
#define DWC3_HAS_XHCI			BIT(1)
#define DWC3_HAS_OTG			BIT(3)

/* prototypes */
void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type);

/* check whether we are on the DWC_usb3 core */
static inline bool dwc3_is_usb3(struct dwc3 *dwc)
{
	return !(dwc->revision & DWC3_REVISION_IS_DWC31);
}

/* check whether we are on the DWC_usb31 core */
static inline bool dwc3_is_usb31(struct dwc3 *dwc)
{
	return !!(dwc->revision & DWC3_REVISION_IS_DWC31);
}

bool dwc3_has_imod(struct dwc3 *dwc);

#if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_host_init(struct dwc3 *dwc);
void dwc3_host_exit(struct dwc3 *dwc);
#else
static inline int dwc3_host_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_host_exit(struct dwc3 *dwc)
{ }
#endif

#if IS_ENABLED(CONFIG_USB_DWC3_GADGET) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_gadget_init(struct dwc3 *dwc);
void dwc3_gadget_exit(struct dwc3 *dwc);
int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode);
int dwc3_gadget_get_link_state(struct dwc3 *dwc);
int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state);
int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
		struct dwc3_gadget_ep_cmd_params *params);
int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param);
#else
static inline int dwc3_gadget_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_gadget_exit(struct dwc3 *dwc)
{ }
static inline int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
{ return 0; }
static inline int dwc3_gadget_get_link_state(struct dwc3 *dwc)
{ return 0; }
static inline int dwc3_gadget_set_link_state(struct dwc3 *dwc,
		enum dwc3_link_state state)
{ return 0; }

static inline int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
		struct dwc3_gadget_ep_cmd_params *params)
{ return 0; }
static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc,
		int cmd, u32 param)
{ return 0; }
#endif

#if IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_drd_init(struct dwc3 *dwc);
void dwc3_drd_exit(struct dwc3 *dwc);
#else
static inline int dwc3_drd_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_drd_exit(struct dwc3 *dwc)
{ }
#endif

/* power management interface */
#if !IS_ENABLED(CONFIG_USB_DWC3_HOST)
int dwc3_gadget_suspend(struct dwc3 *dwc);
int dwc3_gadget_resume(struct dwc3 *dwc);
void dwc3_gadget_process_pending_events(struct dwc3 *dwc);
#else
static inline int dwc3_gadget_suspend(struct dwc3 *dwc)
{
	return 0;
}

static inline int dwc3_gadget_resume(struct dwc3 *dwc)
{
	return 0;
}

static inline void dwc3_gadget_process_pending_events(struct dwc3 *dwc)
{
}
#endif /* !IS_ENABLED(CONFIG_USB_DWC3_HOST) */

#if IS_ENABLED(CONFIG_USB_DWC3_ULPI)
int dwc3_ulpi_init(struct dwc3 *dwc);
void dwc3_ulpi_exit(struct dwc3 *dwc);
#else
static inline int dwc3_ulpi_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_ulpi_exit(struct dwc3 *dwc)
{ }
#endif

#endif /* __DRIVERS_USB_DWC3_CORE_H */
OpenPOWER on IntegriCloud