forked from lemonjesus/qemu-ipod-nano
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathsd.c
1765 lines (1505 loc) · 48.2 KB
/
sd.c
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
/*
* SD Memory Card emulation as defined in the "SD Memory Card Physical
* layer specification, Version 1.10."
*
* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
* Copyright (c) 2007 CodeSourcery
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "hw/hw.h"
#include "sysemu/block-backend.h"
#include "hw/sd.h"
#include "qemu/bitmap.h"
//#define DEBUG_SD 1
#ifdef DEBUG_SD
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, "SD: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#define ACMD41_ENQUIRY_MASK 0x00ffffff
typedef enum {
sd_r0 = 0, /* no response */
sd_r1, /* normal response command */
sd_r2_i, /* CID register */
sd_r2_s, /* CSD register */
sd_r3, /* OCR register */
sd_r6 = 6, /* Published RCA response */
sd_r7, /* Operating voltage */
sd_r1b = -1,
sd_illegal = -2,
} sd_rsp_type_t;
enum SDCardModes {
sd_inactive,
sd_card_identification_mode,
sd_data_transfer_mode,
};
enum SDCardStates {
sd_inactive_state = -1,
sd_idle_state = 0,
sd_ready_state,
sd_identification_state,
sd_standby_state,
sd_transfer_state,
sd_sendingdata_state,
sd_receivingdata_state,
sd_programming_state,
sd_disconnect_state,
};
struct SDState {
uint32_t mode; /* current card mode, one of SDCardModes */
int32_t state; /* current card state, one of SDCardStates */
uint32_t ocr;
uint8_t scr[8];
uint8_t cid[16];
uint8_t csd[16];
uint16_t rca;
uint32_t card_status;
uint8_t sd_status[64];
uint32_t vhs;
bool wp_switch;
unsigned long *wp_groups;
int32_t wpgrps_size;
uint64_t size;
uint32_t blk_len;
uint32_t erase_start;
uint32_t erase_end;
uint8_t pwd[16];
uint32_t pwd_len;
uint8_t function_group[6];
bool spi;
uint8_t current_cmd;
/* True if we will handle the next command as an ACMD. Note that this does
* *not* track the APP_CMD status bit!
*/
bool expecting_acmd;
uint32_t blk_written;
uint64_t data_start;
uint32_t data_offset;
uint8_t data[512];
qemu_irq readonly_cb;
qemu_irq inserted_cb;
BlockBackend *blk;
uint8_t *buf;
bool enable;
};
static void sd_set_mode(SDState *sd)
{
switch (sd->state) {
case sd_inactive_state:
sd->mode = sd_inactive;
break;
case sd_idle_state:
case sd_ready_state:
case sd_identification_state:
sd->mode = sd_card_identification_mode;
break;
case sd_standby_state:
case sd_transfer_state:
case sd_sendingdata_state:
case sd_receivingdata_state:
case sd_programming_state:
case sd_disconnect_state:
sd->mode = sd_data_transfer_mode;
break;
}
}
static const sd_cmd_type_t sd_cmd_type[64] = {
sd_bc, sd_none, sd_bcr, sd_bcr, sd_none, sd_none, sd_none, sd_ac,
sd_bcr, sd_ac, sd_ac, sd_adtc, sd_ac, sd_ac, sd_none, sd_ac,
sd_ac, sd_adtc, sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none,
sd_adtc, sd_adtc, sd_adtc, sd_adtc, sd_ac, sd_ac, sd_adtc, sd_none,
sd_ac, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none,
sd_none, sd_none, sd_bc, sd_none, sd_none, sd_none, sd_none, sd_none,
sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac,
sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
};
static const int sd_cmd_class[64] = {
0, 0, 0, 0, 0, 9, 10, 0, 0, 0, 0, 1, 0, 0, 0, 0,
2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 6, 6, 6, 6,
5, 5, 10, 10, 10, 10, 5, 9, 9, 9, 7, 7, 7, 7, 7, 7,
7, 7, 10, 7, 9, 9, 9, 8, 8, 10, 8, 8, 8, 8, 8, 8,
};
static uint8_t sd_crc7(void *message, size_t width)
{
int i, bit;
uint8_t shift_reg = 0x00;
uint8_t *msg = (uint8_t *) message;
for (i = 0; i < width; i ++, msg ++)
for (bit = 7; bit >= 0; bit --) {
shift_reg <<= 1;
if ((shift_reg >> 7) ^ ((*msg >> bit) & 1))
shift_reg ^= 0x89;
}
return shift_reg;
}
static uint16_t sd_crc16(void *message, size_t width)
{
int i, bit;
uint16_t shift_reg = 0x0000;
uint16_t *msg = (uint16_t *) message;
width <<= 1;
for (i = 0; i < width; i ++, msg ++)
for (bit = 15; bit >= 0; bit --) {
shift_reg <<= 1;
if ((shift_reg >> 15) ^ ((*msg >> bit) & 1))
shift_reg ^= 0x1011;
}
return shift_reg;
}
static void sd_set_ocr(SDState *sd)
{
/* All voltages OK, card power-up OK, Standard Capacity SD Memory Card */
sd->ocr = 0x80ffff00;
}
static void sd_set_scr(SDState *sd)
{
sd->scr[0] = 0x00; /* SCR Structure */
sd->scr[1] = 0x2f; /* SD Security Support */
sd->scr[2] = 0x00;
sd->scr[3] = 0x00;
sd->scr[4] = 0x00;
sd->scr[5] = 0x00;
sd->scr[6] = 0x00;
sd->scr[7] = 0x00;
}
#define MID 0xaa
#define OID "XY"
#define PNM "QEMU!"
#define PRV 0x01
#define MDT_YR 2006
#define MDT_MON 2
static void sd_set_cid(SDState *sd)
{
sd->cid[0] = MID; /* Fake card manufacturer ID (MID) */
sd->cid[1] = OID[0]; /* OEM/Application ID (OID) */
sd->cid[2] = OID[1];
sd->cid[3] = PNM[0]; /* Fake product name (PNM) */
sd->cid[4] = PNM[1];
sd->cid[5] = PNM[2];
sd->cid[6] = PNM[3];
sd->cid[7] = PNM[4];
sd->cid[8] = PRV; /* Fake product revision (PRV) */
sd->cid[9] = 0xde; /* Fake serial number (PSN) */
sd->cid[10] = 0xad;
sd->cid[11] = 0xbe;
sd->cid[12] = 0xef;
sd->cid[13] = 0x00 | /* Manufacture date (MDT) */
((MDT_YR - 2000) / 10);
sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON;
sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
}
#define HWBLOCK_SHIFT 9 /* 512 bytes */
#define SECTOR_SHIFT 5 /* 16 kilobytes */
#define WPGROUP_SHIFT 7 /* 2 megs */
#define CMULT_SHIFT 9 /* 512 times HWBLOCK_SIZE */
#define WPGROUP_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT))
static const uint8_t sd_csd_rw_mask[16] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe,
};
static void sd_set_csd(SDState *sd, uint64_t size)
{
uint32_t csize = (size >> (CMULT_SHIFT + HWBLOCK_SHIFT)) - 1;
uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
if (size <= 0x40000000) { /* Standard Capacity SD */
sd->csd[0] = 0x00; /* CSD structure */
sd->csd[1] = 0x26; /* Data read access-time-1 */
sd->csd[2] = 0x00; /* Data read access-time-2 */
sd->csd[3] = 0x5a; /* Max. data transfer rate */
sd->csd[4] = 0x5f; /* Card Command Classes */
sd->csd[5] = 0x50 | /* Max. read data block length */
HWBLOCK_SHIFT;
sd->csd[6] = 0xe0 | /* Partial block for read allowed */
((csize >> 10) & 0x03);
sd->csd[7] = 0x00 | /* Device size */
((csize >> 2) & 0xff);
sd->csd[8] = 0x3f | /* Max. read current */
((csize << 6) & 0xc0);
sd->csd[9] = 0xfc | /* Max. write current */
((CMULT_SHIFT - 2) >> 1);
sd->csd[10] = 0x40 | /* Erase sector size */
(((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1);
sd->csd[11] = 0x00 | /* Write protect group size */
((sectsize << 7) & 0x80) | wpsize;
sd->csd[12] = 0x90 | /* Write speed factor */
(HWBLOCK_SHIFT >> 2);
sd->csd[13] = 0x20 | /* Max. write data block length */
((HWBLOCK_SHIFT << 6) & 0xc0);
sd->csd[14] = 0x00; /* File format group */
sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
} else { /* SDHC */
size /= 512 * 1024;
size -= 1;
sd->csd[0] = 0x40;
sd->csd[1] = 0x0e;
sd->csd[2] = 0x00;
sd->csd[3] = 0x32;
sd->csd[4] = 0x5b;
sd->csd[5] = 0x59;
sd->csd[6] = 0x00;
sd->csd[7] = (size >> 16) & 0xff;
sd->csd[8] = (size >> 8) & 0xff;
sd->csd[9] = (size & 0xff);
sd->csd[10] = 0x7f;
sd->csd[11] = 0x80;
sd->csd[12] = 0x0a;
sd->csd[13] = 0x40;
sd->csd[14] = 0x00;
sd->csd[15] = 0x00;
sd->ocr |= 1 << 30; /* High Capacity SD Memory Card */
}
}
static void sd_set_rca(SDState *sd)
{
sd->rca += 0x4567;
}
/* Card status bits, split by clear condition:
* A : According to the card current state
* B : Always related to the previous command
* C : Cleared by read
*/
#define CARD_STATUS_A 0x02004100
#define CARD_STATUS_B 0x00c01e00
#define CARD_STATUS_C 0xfd39a028
static void sd_set_cardstatus(SDState *sd)
{
sd->card_status = 0x00000100;
}
static void sd_set_sdstatus(SDState *sd)
{
memset(sd->sd_status, 0, 64);
}
static int sd_req_crc_validate(SDRequest *req)
{
uint8_t buffer[5];
buffer[0] = 0x40 | req->cmd;
buffer[1] = (req->arg >> 24) & 0xff;
buffer[2] = (req->arg >> 16) & 0xff;
buffer[3] = (req->arg >> 8) & 0xff;
buffer[4] = (req->arg >> 0) & 0xff;
return 0;
return sd_crc7(buffer, 5) != req->crc; /* TODO */
}
static void sd_response_r1_make(SDState *sd, uint8_t *response)
{
uint32_t status = sd->card_status;
/* Clear the "clear on read" status bits */
sd->card_status &= ~CARD_STATUS_C;
response[0] = (status >> 24) & 0xff;
response[1] = (status >> 16) & 0xff;
response[2] = (status >> 8) & 0xff;
response[3] = (status >> 0) & 0xff;
}
static void sd_response_r3_make(SDState *sd, uint8_t *response)
{
response[0] = (sd->ocr >> 24) & 0xff;
response[1] = (sd->ocr >> 16) & 0xff;
response[2] = (sd->ocr >> 8) & 0xff;
response[3] = (sd->ocr >> 0) & 0xff;
}
static void sd_response_r6_make(SDState *sd, uint8_t *response)
{
uint16_t arg;
uint16_t status;
arg = sd->rca;
status = ((sd->card_status >> 8) & 0xc000) |
((sd->card_status >> 6) & 0x2000) |
(sd->card_status & 0x1fff);
sd->card_status &= ~(CARD_STATUS_C & 0xc81fff);
response[0] = (arg >> 8) & 0xff;
response[1] = arg & 0xff;
response[2] = (status >> 8) & 0xff;
response[3] = status & 0xff;
}
static void sd_response_r7_make(SDState *sd, uint8_t *response)
{
response[0] = (sd->vhs >> 24) & 0xff;
response[1] = (sd->vhs >> 16) & 0xff;
response[2] = (sd->vhs >> 8) & 0xff;
response[3] = (sd->vhs >> 0) & 0xff;
}
static inline uint64_t sd_addr_to_wpnum(uint64_t addr)
{
return addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
}
static void sd_reset(SDState *sd, BlockBackend *blk)
{
uint64_t size;
uint64_t sect;
if (blk) {
blk_get_geometry(blk, §);
} else {
sect = 0;
}
size = sect << 9;
sect = sd_addr_to_wpnum(size) + 1;
sd->state = sd_idle_state;
sd->rca = 0x0000;
sd_set_ocr(sd);
sd_set_scr(sd);
sd_set_cid(sd);
sd_set_csd(sd, size);
sd_set_cardstatus(sd);
sd_set_sdstatus(sd);
sd->blk = blk;
if (sd->wp_groups)
g_free(sd->wp_groups);
sd->wp_switch = blk ? blk_is_read_only(blk) : false;
sd->wpgrps_size = sect;
sd->wp_groups = bitmap_new(sd->wpgrps_size);
memset(sd->function_group, 0, sizeof(sd->function_group));
sd->erase_start = 0;
sd->erase_end = 0;
sd->size = size;
sd->blk_len = 0x200;
sd->pwd_len = 0;
sd->expecting_acmd = false;
}
static void sd_cardchange(void *opaque, bool load)
{
SDState *sd = opaque;
qemu_set_irq(sd->inserted_cb, blk_is_inserted(sd->blk));
if (blk_is_inserted(sd->blk)) {
sd_reset(sd, sd->blk);
qemu_set_irq(sd->readonly_cb, sd->wp_switch);
}
}
static const BlockDevOps sd_block_ops = {
.change_media_cb = sd_cardchange,
};
static const VMStateDescription sd_vmstate = {
.name = "sd-card",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(mode, SDState),
VMSTATE_INT32(state, SDState),
VMSTATE_UINT8_ARRAY(cid, SDState, 16),
VMSTATE_UINT8_ARRAY(csd, SDState, 16),
VMSTATE_UINT16(rca, SDState),
VMSTATE_UINT32(card_status, SDState),
VMSTATE_PARTIAL_BUFFER(sd_status, SDState, 1),
VMSTATE_UINT32(vhs, SDState),
VMSTATE_BITMAP(wp_groups, SDState, 0, wpgrps_size),
VMSTATE_UINT32(blk_len, SDState),
VMSTATE_UINT32(erase_start, SDState),
VMSTATE_UINT32(erase_end, SDState),
VMSTATE_UINT8_ARRAY(pwd, SDState, 16),
VMSTATE_UINT32(pwd_len, SDState),
VMSTATE_UINT8_ARRAY(function_group, SDState, 6),
VMSTATE_UINT8(current_cmd, SDState),
VMSTATE_BOOL(expecting_acmd, SDState),
VMSTATE_UINT32(blk_written, SDState),
VMSTATE_UINT64(data_start, SDState),
VMSTATE_UINT32(data_offset, SDState),
VMSTATE_UINT8_ARRAY(data, SDState, 512),
VMSTATE_BUFFER_POINTER_UNSAFE(buf, SDState, 1, 512),
VMSTATE_BOOL(enable, SDState),
VMSTATE_END_OF_LIST()
}
};
/* We do not model the chip select pin, so allow the board to select
whether card should be in SSI or MMC/SD mode. It is also up to the
board to ensure that ssi transfers only occur when the chip select
is asserted. */
SDState *sd_init(BlockBackend *blk, bool is_spi)
{
SDState *sd;
if (blk && blk_is_read_only(blk)) {
fprintf(stderr, "sd_init: Cannot use read-only drive\n");
return NULL;
}
sd = (SDState *) g_malloc0(sizeof(SDState));
sd->buf = blk_blockalign(blk, 512);
sd->spi = is_spi;
sd->enable = true;
sd_reset(sd, blk);
if (sd->blk) {
blk_attach_dev_nofail(sd->blk, sd);
blk_set_dev_ops(sd->blk, &sd_block_ops, sd);
}
vmstate_register(NULL, -1, &sd_vmstate, sd);
return sd;
}
void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
{
sd->readonly_cb = readonly;
sd->inserted_cb = insert;
qemu_set_irq(readonly, sd->blk ? blk_is_read_only(sd->blk) : 0);
qemu_set_irq(insert, sd->blk ? blk_is_inserted(sd->blk) : 0);
}
static void sd_erase(SDState *sd)
{
int i;
uint64_t erase_start = sd->erase_start;
uint64_t erase_end = sd->erase_end;
if (!sd->erase_start || !sd->erase_end) {
sd->card_status |= ERASE_SEQ_ERROR;
return;
}
if (extract32(sd->ocr, OCR_CCS_BITN, 1)) {
/* High capacity memory card: erase units are 512 byte blocks */
erase_start *= 512;
erase_end *= 512;
}
erase_start = sd_addr_to_wpnum(erase_start);
erase_end = sd_addr_to_wpnum(erase_end);
sd->erase_start = 0;
sd->erase_end = 0;
sd->csd[14] |= 0x40;
for (i = erase_start; i <= erase_end; i++) {
if (test_bit(i, sd->wp_groups)) {
sd->card_status |= WP_ERASE_SKIP;
}
}
}
static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
{
uint32_t i, wpnum;
uint32_t ret = 0;
wpnum = sd_addr_to_wpnum(addr);
for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) {
if (addr < sd->size && test_bit(wpnum, sd->wp_groups)) {
ret |= (1 << i);
}
}
return ret;
}
static void sd_function_switch(SDState *sd, uint32_t arg)
{
int i, mode, new_func, crc;
mode = !!(arg & 0x80000000);
sd->data[0] = 0x00; /* Maximum current consumption */
sd->data[1] = 0x01;
sd->data[2] = 0x80; /* Supported group 6 functions */
sd->data[3] = 0x01;
sd->data[4] = 0x80; /* Supported group 5 functions */
sd->data[5] = 0x01;
sd->data[6] = 0x80; /* Supported group 4 functions */
sd->data[7] = 0x01;
sd->data[8] = 0x80; /* Supported group 3 functions */
sd->data[9] = 0x01;
sd->data[10] = 0x80; /* Supported group 2 functions */
sd->data[11] = 0x43;
sd->data[12] = 0x80; /* Supported group 1 functions */
sd->data[13] = 0x03;
for (i = 0; i < 6; i ++) {
new_func = (arg >> (i * 4)) & 0x0f;
if (mode && new_func != 0x0f)
sd->function_group[i] = new_func;
sd->data[14 + (i >> 1)] = new_func << ((i * 4) & 4);
}
memset(&sd->data[17], 0, 47);
crc = sd_crc16(sd->data, 64);
sd->data[65] = crc >> 8;
sd->data[66] = crc & 0xff;
}
static inline bool sd_wp_addr(SDState *sd, uint64_t addr)
{
return test_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
}
static void sd_lock_command(SDState *sd)
{
int erase, lock, clr_pwd, set_pwd, pwd_len;
erase = !!(sd->data[0] & 0x08);
lock = sd->data[0] & 0x04;
clr_pwd = sd->data[0] & 0x02;
set_pwd = sd->data[0] & 0x01;
if (sd->blk_len > 1)
pwd_len = sd->data[1];
else
pwd_len = 0;
if (erase) {
if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 ||
set_pwd || clr_pwd || lock || sd->wp_switch ||
(sd->csd[14] & 0x20)) {
sd->card_status |= LOCK_UNLOCK_FAILED;
return;
}
bitmap_zero(sd->wp_groups, sd->wpgrps_size);
sd->csd[14] &= ~0x10;
sd->card_status &= ~CARD_IS_LOCKED;
sd->pwd_len = 0;
/* Erasing the entire card here! */
fprintf(stderr, "SD: Card force-erased by CMD42\n");
return;
}
if (sd->blk_len < 2 + pwd_len ||
pwd_len <= sd->pwd_len ||
pwd_len > sd->pwd_len + 16) {
sd->card_status |= LOCK_UNLOCK_FAILED;
return;
}
if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) {
sd->card_status |= LOCK_UNLOCK_FAILED;
return;
}
pwd_len -= sd->pwd_len;
if ((pwd_len && !set_pwd) ||
(clr_pwd && (set_pwd || lock)) ||
(lock && !sd->pwd_len && !set_pwd) ||
(!set_pwd && !clr_pwd &&
(((sd->card_status & CARD_IS_LOCKED) && lock) ||
(!(sd->card_status & CARD_IS_LOCKED) && !lock)))) {
sd->card_status |= LOCK_UNLOCK_FAILED;
return;
}
if (set_pwd) {
memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len);
sd->pwd_len = pwd_len;
}
if (clr_pwd) {
sd->pwd_len = 0;
}
if (lock)
sd->card_status |= CARD_IS_LOCKED;
else
sd->card_status &= ~CARD_IS_LOCKED;
}
static sd_rsp_type_t sd_normal_command(SDState *sd,
SDRequest req)
{
uint32_t rca = 0x0000;
uint64_t addr = (sd->ocr & (1 << 30)) ? (uint64_t) req.arg << 9 : req.arg;
/* Not interpreting this as an app command */
sd->card_status &= ~APP_CMD;
if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
rca = req.arg >> 16;
DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state);
switch (req.cmd) {
/* Basic commands (Class 0 and Class 1) */
case 0: /* CMD0: GO_IDLE_STATE */
switch (sd->state) {
case sd_inactive_state:
return sd->spi ? sd_r1 : sd_r0;
default:
sd->state = sd_idle_state;
sd_reset(sd, sd->blk);
return sd->spi ? sd_r1 : sd_r0;
}
break;
case 1: /* CMD1: SEND_OP_CMD */
if (!sd->spi)
goto bad_cmd;
sd->state = sd_transfer_state;
return sd_r1;
case 2: /* CMD2: ALL_SEND_CID */
if (sd->spi)
goto bad_cmd;
switch (sd->state) {
case sd_ready_state:
sd->state = sd_identification_state;
return sd_r2_i;
default:
break;
}
break;
case 3: /* CMD3: SEND_RELATIVE_ADDR */
if (sd->spi)
goto bad_cmd;
switch (sd->state) {
case sd_identification_state:
case sd_standby_state:
sd->state = sd_standby_state;
sd_set_rca(sd);
return sd_r6;
default:
break;
}
break;
case 4: /* CMD4: SEND_DSR */
if (sd->spi)
goto bad_cmd;
switch (sd->state) {
case sd_standby_state:
break;
default:
break;
}
break;
case 5: /* CMD5: reserved for SDIO cards */
return sd_illegal;
case 6: /* CMD6: SWITCH_FUNCTION */
if (sd->spi)
goto bad_cmd;
switch (sd->mode) {
case sd_data_transfer_mode:
sd_function_switch(sd, req.arg);
sd->state = sd_sendingdata_state;
sd->data_start = 0;
sd->data_offset = 0;
return sd_r1;
default:
break;
}
break;
case 7: /* CMD7: SELECT/DESELECT_CARD */
if (sd->spi)
goto bad_cmd;
switch (sd->state) {
case sd_standby_state:
if (sd->rca != rca)
return sd_r0;
sd->state = sd_transfer_state;
return sd_r1b;
case sd_transfer_state:
case sd_sendingdata_state:
if (sd->rca == rca)
break;
sd->state = sd_standby_state;
return sd_r1b;
case sd_disconnect_state:
if (sd->rca != rca)
return sd_r0;
sd->state = sd_programming_state;
return sd_r1b;
case sd_programming_state:
if (sd->rca == rca)
break;
sd->state = sd_disconnect_state;
return sd_r1b;
default:
break;
}
break;
case 8: /* CMD8: SEND_IF_COND */
/* Physical Layer Specification Version 2.00 command */
switch (sd->state) {
case sd_idle_state:
sd->vhs = 0;
/* No response if not exactly one VHS bit is set. */
if (!(req.arg >> 8) || (req.arg >> ffs(req.arg & ~0xff)))
return sd->spi ? sd_r7 : sd_r0;
/* Accept. */
sd->vhs = req.arg;
return sd_r7;
default:
break;
}
break;
case 9: /* CMD9: SEND_CSD */
switch (sd->state) {
case sd_standby_state:
if (sd->rca != rca)
return sd_r0;
return sd_r2_s;
case sd_transfer_state:
if (!sd->spi)
break;
sd->state = sd_sendingdata_state;
memcpy(sd->data, sd->csd, 16);
sd->data_start = addr;
sd->data_offset = 0;
return sd_r1;
default:
break;
}
break;
case 10: /* CMD10: SEND_CID */
switch (sd->state) {
case sd_standby_state:
if (sd->rca != rca)
return sd_r0;
return sd_r2_i;
case sd_transfer_state:
if (!sd->spi)
break;
sd->state = sd_sendingdata_state;
memcpy(sd->data, sd->cid, 16);
sd->data_start = addr;
sd->data_offset = 0;
return sd_r1;
default:
break;
}
break;
case 11: /* CMD11: READ_DAT_UNTIL_STOP */
if (sd->spi)
goto bad_cmd;
switch (sd->state) {
case sd_transfer_state:
sd->state = sd_sendingdata_state;
sd->data_start = req.arg;
sd->data_offset = 0;
if (sd->data_start + sd->blk_len > sd->size)
sd->card_status |= ADDRESS_ERROR;
return sd_r0;
default:
break;
}
break;
case 12: /* CMD12: STOP_TRANSMISSION */
switch (sd->state) {
case sd_sendingdata_state:
sd->state = sd_transfer_state;
return sd_r1b;
case sd_receivingdata_state:
sd->state = sd_programming_state;
/* Bzzzzzzztt .... Operation complete. */
sd->state = sd_transfer_state;
return sd_r1b;
default:
break;
}
break;
case 13: /* CMD13: SEND_STATUS */
switch (sd->mode) {
case sd_data_transfer_mode:
if (sd->rca != rca)
return sd_r0;
return sd_r1;
default:
break;
}
break;
case 15: /* CMD15: GO_INACTIVE_STATE */
if (sd->spi)
goto bad_cmd;
switch (sd->mode) {
case sd_data_transfer_mode:
if (sd->rca != rca)
return sd_r0;
sd->state = sd_inactive_state;
return sd_r0;
default:
break;
}
break;
/* Block read commands (Classs 2) */
case 16: /* CMD16: SET_BLOCKLEN */
switch (sd->state) {
case sd_transfer_state:
if (req.arg > (1 << HWBLOCK_SHIFT))
sd->card_status |= BLOCK_LEN_ERROR;
else
sd->blk_len = req.arg;
return sd_r1;
default:
break;
}
break;
case 17: /* CMD17: READ_SINGLE_BLOCK */
switch (sd->state) {
case sd_transfer_state:
sd->state = sd_sendingdata_state;
sd->data_start = addr;
sd->data_offset = 0;
if (sd->data_start + sd->blk_len > sd->size)
sd->card_status |= ADDRESS_ERROR;
return sd_r1;
default:
break;
}
break;
case 18: /* CMD18: READ_MULTIPLE_BLOCK */
switch (sd->state) {
case sd_transfer_state:
sd->state = sd_sendingdata_state;
sd->data_start = addr;
sd->data_offset = 0;
if (sd->data_start + sd->blk_len > sd->size)
sd->card_status |= ADDRESS_ERROR;
return sd_r1;
default:
break;
}
break;
/* Block write commands (Class 4) */
case 24: /* CMD24: WRITE_SINGLE_BLOCK */
if (sd->spi)
goto unimplemented_cmd;
switch (sd->state) {
case sd_transfer_state:
/* Writing in SPI mode not implemented. */
if (sd->spi)
break;
sd->state = sd_receivingdata_state;
sd->data_start = addr;
sd->data_offset = 0;
sd->blk_written = 0;
if (sd->data_start + sd->blk_len > sd->size)
sd->card_status |= ADDRESS_ERROR;
if (sd_wp_addr(sd, sd->data_start))
sd->card_status |= WP_VIOLATION;
if (sd->csd[14] & 0x30)
sd->card_status |= WP_VIOLATION;
return sd_r1;
default:
break;
}
break;
case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
if (sd->spi)
goto unimplemented_cmd;
switch (sd->state) {
case sd_transfer_state:
/* Writing in SPI mode not implemented. */
if (sd->spi)