summaryrefslogtreecommitdiff
path: root/drivers/memstick/core/mspro_block.c
blob: 0fb27d3388110909e172a25750fce141d5cdd176 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
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
/*
 *  Sony MemoryStick Pro storage support
 *
 *  Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Special thanks to Carlos Corbacho for providing various MemoryStick cards
 * that made this driver possible.
 *
 */

#include <linux/blkdev.h>
#include <linux/idr.h>
#include <linux/hdreg.h>
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/memstick.h>
#include <linux/module.h>

#define DRIVER_NAME "mspro_block"

static int major;
module_param(major, int, 0644);

#define MSPRO_BLOCK_MAX_SEGS  32
#define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)

#define MSPRO_BLOCK_SIGNATURE        0xa5c3
#define MSPRO_BLOCK_MAX_ATTRIBUTES   41

#define MSPRO_BLOCK_PART_SHIFT 3

enum {
	MSPRO_BLOCK_ID_SYSINFO         = 0x10,
	MSPRO_BLOCK_ID_MODELNAME       = 0x15,
	MSPRO_BLOCK_ID_MBR             = 0x20,
	MSPRO_BLOCK_ID_PBR16           = 0x21,
	MSPRO_BLOCK_ID_PBR32           = 0x22,
	MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
	MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
	MSPRO_BLOCK_ID_DEVINFO         = 0x30
};

struct mspro_sys_attr {
	size_t                  size;
	void                    *data;
	unsigned char           id;
	char                    name[32];
	struct device_attribute dev_attr;
};

struct mspro_attr_entry {
	__be32 address;
	__be32 size;
	unsigned char id;
	unsigned char reserved[3];
} __attribute__((packed));

struct mspro_attribute {
	__be16 signature;
	unsigned short          version;
	unsigned char           count;
	unsigned char           reserved[11];
	struct mspro_attr_entry entries[];
} __attribute__((packed));

struct mspro_sys_info {
	unsigned char  class;
	unsigned char  reserved0;
	__be16 block_size;
	__be16 block_count;
	__be16 user_block_count;
	__be16 page_size;
	unsigned char  reserved1[2];
	unsigned char  assembly_date[8];
	__be32 serial_number;
	unsigned char  assembly_maker_code;
	unsigned char  assembly_model_code[3];
	__be16 memory_maker_code;
	__be16 memory_model_code;
	unsigned char  reserved2[4];
	unsigned char  vcc;
	unsigned char  vpp;
	__be16 controller_number;
	__be16 controller_function;
	__be16 start_sector;
	__be16 unit_size;
	unsigned char  ms_sub_class;
	unsigned char  reserved3[4];
	unsigned char  interface_type;
	__be16 controller_code;
	unsigned char  format_type;
	unsigned char  reserved4;
	unsigned char  device_type;
	unsigned char  reserved5[7];
	unsigned char  mspro_id[16];
	unsigned char  reserved6[16];
} __attribute__((packed));

struct mspro_mbr {
	unsigned char boot_partition;
	unsigned char start_head;
	unsigned char start_sector;
	unsigned char start_cylinder;
	unsigned char partition_type;
	unsigned char end_head;
	unsigned char end_sector;
	unsigned char end_cylinder;
	unsigned int  start_sectors;
	unsigned int  sectors_per_partition;
} __attribute__((packed));

struct mspro_specfile {
	char           name[8];
	char           ext[3];
	unsigned char  attr;
	unsigned char  reserved[10];
	unsigned short time;
	unsigned short date;
	unsigned short cluster;
	unsigned int   size;
} __attribute__((packed));

struct mspro_devinfo {
	__be16 cylinders;
	__be16 heads;
	__be16 bytes_per_track;
	__be16 bytes_per_sector;
	__be16 sectors_per_track;
	unsigned char  reserved[6];
} __attribute__((packed));

struct mspro_block_data {
	struct memstick_dev   *card;
	unsigned int          usage_count;
	unsigned int          caps;
	struct gendisk        *disk;
	struct request_queue  *queue;
	struct request        *block_req;
	spinlock_t            q_lock;

	unsigned short        page_size;
	unsigned short        cylinders;
	unsigned short        heads;
	unsigned short        sectors_per_track;

	unsigned char         system;
	unsigned char         read_only:1,
			      eject:1,
			      has_request:1,
			      data_dir:1,
			      active:1;
	unsigned char         transfer_cmd;

	int                   (*mrq_handler)(struct memstick_dev *card,
					     struct memstick_request **mrq);


	/* Default request setup function for data access method preferred by
	 * this host instance.
	 */
	void                  (*setup_transfer)(struct memstick_dev *card,
						u64 offset, size_t length);

	struct attribute_group attr_group;

	struct scatterlist    req_sg[MSPRO_BLOCK_MAX_SEGS];
	unsigned int          seg_count;
	unsigned int          current_seg;
	unsigned int          current_page;
};

static DEFINE_IDR(mspro_block_disk_idr);
static DEFINE_MUTEX(mspro_block_disk_lock);

static int mspro_block_complete_req(struct memstick_dev *card, int error);

/*** Block device ***/

static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
{
	struct gendisk *disk = bdev->bd_disk;
	struct mspro_block_data *msb = disk->private_data;
	int rc = -ENXIO;

	mutex_lock(&mspro_block_disk_lock);

	if (msb && msb->card) {
		msb->usage_count++;
		if ((mode & FMODE_WRITE) && msb->read_only)
			rc = -EROFS;
		else
			rc = 0;
	}

	mutex_unlock(&mspro_block_disk_lock);

	return rc;
}


static void mspro_block_disk_release(struct gendisk *disk)
{
	struct mspro_block_data *msb = disk->private_data;
	int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;

	mutex_lock(&mspro_block_disk_lock);

	if (msb) {
		if (msb->usage_count)
			msb->usage_count--;

		if (!msb->usage_count) {
			kfree(msb);
			disk->private_data = NULL;
			idr_remove(&mspro_block_disk_idr, disk_id);
			put_disk(disk);
		}
	}

	mutex_unlock(&mspro_block_disk_lock);
}

static void mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
{
	mspro_block_disk_release(disk);
}

static int mspro_block_bd_getgeo(struct block_device *bdev,
				 struct hd_geometry *geo)
{
	struct mspro_block_data *msb = bdev->bd_disk->private_data;

	geo->heads = msb->heads;
	geo->sectors = msb->sectors_per_track;
	geo->cylinders = msb->cylinders;

	return 0;
}

static const struct block_device_operations ms_block_bdops = {
	.open    = mspro_block_bd_open,
	.release = mspro_block_bd_release,
	.getgeo  = mspro_block_bd_getgeo,
	.owner   = THIS_MODULE
};

/*** Information ***/

static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
{
	struct device_attribute *dev_attr
		= container_of(attr, struct device_attribute, attr);
	return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
}

static const char *mspro_block_attr_name(unsigned char tag)
{
	switch (tag) {
	case MSPRO_BLOCK_ID_SYSINFO:
		return "attr_sysinfo";
	case MSPRO_BLOCK_ID_MODELNAME:
		return "attr_modelname";
	case MSPRO_BLOCK_ID_MBR:
		return "attr_mbr";
	case MSPRO_BLOCK_ID_PBR16:
		return "attr_pbr16";
	case MSPRO_BLOCK_ID_PBR32:
		return "attr_pbr32";
	case MSPRO_BLOCK_ID_SPECFILEVALUES1:
		return "attr_specfilevalues1";
	case MSPRO_BLOCK_ID_SPECFILEVALUES2:
		return "attr_specfilevalues2";
	case MSPRO_BLOCK_ID_DEVINFO:
		return "attr_devinfo";
	default:
		return NULL;
	};
}

typedef ssize_t (*sysfs_show_t)(struct device *dev,
				struct device_attribute *attr,
				char *buffer);

static ssize_t mspro_block_attr_show_default(struct device *dev,
					     struct device_attribute *attr,
					     char *buffer)
{
	struct mspro_sys_attr *s_attr = container_of(attr,
						     struct mspro_sys_attr,
						     dev_attr);

	ssize_t cnt, rc = 0;

	for (cnt = 0; cnt < s_attr->size; cnt++) {
		if (cnt && !(cnt % 16)) {
			if (PAGE_SIZE - rc)
				buffer[rc++] = '\n';
		}

		rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
				((unsigned char *)s_attr->data)[cnt]);
	}
	return rc;
}

static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
					     struct device_attribute *attr,
					     char *buffer)
{
	struct mspro_sys_attr *x_attr = container_of(attr,
						     struct mspro_sys_attr,
						     dev_attr);
	struct mspro_sys_info *x_sys = x_attr->data;
	ssize_t rc = 0;
	int date_tz = 0, date_tz_f = 0;

	if (x_sys->assembly_date[0] > 0x80U) {
		date_tz = (~x_sys->assembly_date[0]) + 1;
		date_tz_f = date_tz & 3;
		date_tz >>= 2;
		date_tz = -date_tz;
		date_tz_f *= 15;
	} else if (x_sys->assembly_date[0] < 0x80U) {
		date_tz = x_sys->assembly_date[0];
		date_tz_f = date_tz & 3;
		date_tz >>= 2;
		date_tz_f *= 15;
	}

	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
			x_sys->class);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
			be16_to_cpu(x_sys->block_size));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
			be16_to_cpu(x_sys->block_count));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
			be16_to_cpu(x_sys->user_block_count));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
			be16_to_cpu(x_sys->page_size));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
			"GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
			date_tz, date_tz_f,
			be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
			x_sys->assembly_date[3], x_sys->assembly_date[4],
			x_sys->assembly_date[5], x_sys->assembly_date[6],
			x_sys->assembly_date[7]);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
			be32_to_cpu(x_sys->serial_number));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
			"assembly maker code: %x\n",
			x_sys->assembly_maker_code);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
			"%02x%02x%02x\n", x_sys->assembly_model_code[0],
			x_sys->assembly_model_code[1],
			x_sys->assembly_model_code[2]);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
			be16_to_cpu(x_sys->memory_maker_code));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
			be16_to_cpu(x_sys->memory_model_code));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
			x_sys->vcc);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
			x_sys->vpp);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
			be16_to_cpu(x_sys->controller_number));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
			"controller function: %x\n",
			be16_to_cpu(x_sys->controller_function));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
			be16_to_cpu(x_sys->start_sector));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
			be16_to_cpu(x_sys->unit_size));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
			x_sys->ms_sub_class);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
			x_sys->interface_type);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
			be16_to_cpu(x_sys->controller_code));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
			x_sys->format_type);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
			x_sys->device_type);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
			x_sys->mspro_id);
	return rc;
}

static ssize_t mspro_block_attr_show_modelname(struct device *dev,
					       struct device_attribute *attr,
					       char *buffer)
{
	struct mspro_sys_attr *s_attr = container_of(attr,
						     struct mspro_sys_attr,
						     dev_attr);

	return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
}

static ssize_t mspro_block_attr_show_mbr(struct device *dev,
					 struct device_attribute *attr,
					 char *buffer)
{
	struct mspro_sys_attr *x_attr = container_of(attr,
						     struct mspro_sys_attr,
						     dev_attr);
	struct mspro_mbr *x_mbr = x_attr->data;
	ssize_t rc = 0;

	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
			x_mbr->boot_partition);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
			x_mbr->start_head);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
			x_mbr->start_sector);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
			x_mbr->start_cylinder);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
			x_mbr->partition_type);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
			x_mbr->end_head);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
			x_mbr->end_sector);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
			x_mbr->end_cylinder);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
			x_mbr->start_sectors);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
			"sectors per partition: %x\n",
			x_mbr->sectors_per_partition);
	return rc;
}

static ssize_t mspro_block_attr_show_specfile(struct device *dev,
					      struct device_attribute *attr,
					      char *buffer)
{
	struct mspro_sys_attr *x_attr = container_of(attr,
						     struct mspro_sys_attr,
						     dev_attr);
	struct mspro_specfile *x_spfile = x_attr->data;
	char name[9], ext[4];
	ssize_t rc = 0;

	memcpy(name, x_spfile->name, 8);
	name[8] = 0;
	memcpy(ext, x_spfile->ext, 3);
	ext[3] = 0;

	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
			x_spfile->attr);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
			x_spfile->time >> 11,
			(x_spfile->time >> 5) & 0x3f,
			(x_spfile->time & 0x1f) * 2);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
			(x_spfile->date >> 9) + 1980,
			(x_spfile->date >> 5) & 0xf,
			x_spfile->date & 0x1f);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
			x_spfile->cluster);
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
			x_spfile->size);
	return rc;
}

static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
					     struct device_attribute *attr,
					     char *buffer)
{
	struct mspro_sys_attr *x_attr = container_of(attr,
						     struct mspro_sys_attr,
						     dev_attr);
	struct mspro_devinfo *x_devinfo = x_attr->data;
	ssize_t rc = 0;

	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
			be16_to_cpu(x_devinfo->cylinders));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
			be16_to_cpu(x_devinfo->heads));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
			be16_to_cpu(x_devinfo->bytes_per_track));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
			be16_to_cpu(x_devinfo->bytes_per_sector));
	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
			be16_to_cpu(x_devinfo->sectors_per_track));
	return rc;
}

static sysfs_show_t mspro_block_attr_show(unsigned char tag)
{
	switch (tag) {
	case MSPRO_BLOCK_ID_SYSINFO:
		return mspro_block_attr_show_sysinfo;
	case MSPRO_BLOCK_ID_MODELNAME:
		return mspro_block_attr_show_modelname;
	case MSPRO_BLOCK_ID_MBR:
		return mspro_block_attr_show_mbr;
	case MSPRO_BLOCK_ID_SPECFILEVALUES1:
	case MSPRO_BLOCK_ID_SPECFILEVALUES2:
		return mspro_block_attr_show_specfile;
	case MSPRO_BLOCK_ID_DEVINFO:
		return mspro_block_attr_show_devinfo;
	default:
		return mspro_block_attr_show_default;
	}
}

/*** Protocol handlers ***/

/*
 * Functions prefixed with "h_" are protocol callbacks. They can be called from
 * interrupt context. Return value of 0 means that request processing is still
 * ongoing, while special error value of -EAGAIN means that current request is
 * finished (and request processor should come back some time later).
 */

static int h_mspro_block_req_init(struct memstick_dev *card,
				  struct memstick_request **mrq)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);

	*mrq = &card->current_mrq;
	card->next_request = msb->mrq_handler;
	return 0;
}

static int h_mspro_block_default(struct memstick_dev *card,
				 struct memstick_request **mrq)
{
	return mspro_block_complete_req(card, (*mrq)->error);
}

static int h_mspro_block_default_bad(struct memstick_dev *card,
				     struct memstick_request **mrq)
{
	return -ENXIO;
}

static int h_mspro_block_get_ro(struct memstick_dev *card,
				struct memstick_request **mrq)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);

	if (!(*mrq)->error) {
		if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
		    & MEMSTICK_STATUS0_WP)
			msb->read_only = 1;
		else
			msb->read_only = 0;
	}

	return mspro_block_complete_req(card, (*mrq)->error);
}

static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
				      struct memstick_request **mrq)
{
	dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);

	if (!(*mrq)->error) {
		if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
			(*mrq)->error = -EFAULT;
		else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
			return 0;
	}

	return mspro_block_complete_req(card, (*mrq)->error);
}

static int h_mspro_block_transfer_data(struct memstick_dev *card,
				       struct memstick_request **mrq)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	unsigned char t_val = 0;
	struct scatterlist t_sg = { 0 };
	size_t t_offset;

	if ((*mrq)->error)
		return mspro_block_complete_req(card, (*mrq)->error);

	switch ((*mrq)->tpc) {
	case MS_TPC_WRITE_REG:
		memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
		(*mrq)->need_card_int = 1;
		return 0;
	case MS_TPC_SET_CMD:
		t_val = (*mrq)->int_reg;
		memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
		if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
			goto has_int_reg;
		return 0;
	case MS_TPC_GET_INT:
		t_val = (*mrq)->data[0];
has_int_reg:
		if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
			t_val = MSPRO_CMD_STOP;
			memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
			card->next_request = h_mspro_block_default;
			return 0;
		}

		if (msb->current_page
		    == (msb->req_sg[msb->current_seg].length
			/ msb->page_size)) {
			msb->current_page = 0;
			msb->current_seg++;

			if (msb->current_seg == msb->seg_count) {
				if (t_val & MEMSTICK_INT_CED) {
					return mspro_block_complete_req(card,
									0);
				} else {
					card->next_request
						= h_mspro_block_wait_for_ced;
					memstick_init_req(*mrq, MS_TPC_GET_INT,
							  NULL, 1);
					return 0;
				}
			}
		}

		if (!(t_val & MEMSTICK_INT_BREQ)) {
			memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
			return 0;
		}

		t_offset = msb->req_sg[msb->current_seg].offset;
		t_offset += msb->current_page * msb->page_size;

		sg_set_page(&t_sg,
			    nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
				     t_offset >> PAGE_SHIFT),
			    msb->page_size, offset_in_page(t_offset));

		memstick_init_req_sg(*mrq, msb->data_dir == READ
					   ? MS_TPC_READ_LONG_DATA
					   : MS_TPC_WRITE_LONG_DATA,
				     &t_sg);
		(*mrq)->need_card_int = 1;
		return 0;
	case MS_TPC_READ_LONG_DATA:
	case MS_TPC_WRITE_LONG_DATA:
		msb->current_page++;
		if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
			t_val = (*mrq)->int_reg;
			goto has_int_reg;
		} else {
			memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
			return 0;
		}

	default:
		BUG();
	}
}

/*** Transfer setup functions for different access methods. ***/

/** Setup data transfer request for SET_CMD TPC with arguments in card
 *  registers.
 *
 *  @card    Current media instance
 *  @offset  Target data offset in bytes
 *  @length  Required transfer length in bytes.
 */
static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
				    size_t length)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	struct mspro_param_register param = {
		.system = msb->system,
		.data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
		/* ISO C90 warning precludes direct initialization for now. */
		.data_address = 0,
		.tpc_param = 0
	};

	do_div(offset, msb->page_size);
	param.data_address = cpu_to_be32((uint32_t)offset);

	card->next_request = h_mspro_block_req_init;
	msb->mrq_handler = h_mspro_block_transfer_data;
	memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
			  &param, sizeof(param));
}

/*** Data transfer ***/

static int mspro_block_issue_req(struct memstick_dev *card, int chunk)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	u64 t_off;
	unsigned int count;

try_again:
	while (chunk) {
		msb->current_page = 0;
		msb->current_seg = 0;
		msb->seg_count = blk_rq_map_sg(msb->block_req->q,
					       msb->block_req,
					       msb->req_sg);

		if (!msb->seg_count) {
			chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
			continue;
		}

		t_off = blk_rq_pos(msb->block_req);
		t_off <<= 9;
		count = blk_rq_bytes(msb->block_req);

		msb->setup_transfer(card, t_off, count);

		msb->data_dir = rq_data_dir(msb->block_req);
		msb->transfer_cmd = msb->data_dir == READ
				    ? MSPRO_CMD_READ_DATA
				    : MSPRO_CMD_WRITE_DATA;

		memstick_new_req(card->host);
		return 0;
	}

	dev_dbg(&card->dev, "blk_fetch\n");
	msb->block_req = blk_fetch_request(msb->queue);
	if (!msb->block_req) {
		dev_dbg(&card->dev, "issue end\n");
		return -EAGAIN;
	}

	dev_dbg(&card->dev, "trying again\n");
	chunk = 1;
	goto try_again;
}

static int mspro_block_complete_req(struct memstick_dev *card, int error)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	int chunk, cnt;
	unsigned int t_len = 0;
	unsigned long flags;

	spin_lock_irqsave(&msb->q_lock, flags);
	dev_dbg(&card->dev, "complete %d, %d\n", msb->has_request ? 1 : 0,
		error);

	if (msb->has_request) {
		/* Nothing to do - not really an error */
		if (error == -EAGAIN)
			error = 0;

		if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
			if (msb->data_dir == READ) {
				for (cnt = 0; cnt < msb->current_seg; cnt++) {
					t_len += msb->req_sg[cnt].length
						 / msb->page_size;

					if (msb->current_page)
						t_len += msb->current_page - 1;

					t_len *= msb->page_size;
				}
			}
		} else
			t_len = blk_rq_bytes(msb->block_req);

		dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);

		if (error && !t_len)
			t_len = blk_rq_cur_bytes(msb->block_req);

		chunk = __blk_end_request(msb->block_req, error, t_len);

		error = mspro_block_issue_req(card, chunk);

		if (!error)
			goto out;
		else
			msb->has_request = 0;
	} else {
		if (!error)
			error = -EAGAIN;
	}

	card->next_request = h_mspro_block_default_bad;
	complete_all(&card->mrq_complete);
out:
	spin_unlock_irqrestore(&msb->q_lock, flags);
	return error;
}

static void mspro_block_stop(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	int rc = 0;
	unsigned long flags;

	while (1) {
		spin_lock_irqsave(&msb->q_lock, flags);
		if (!msb->has_request) {
			blk_stop_queue(msb->queue);
			rc = 1;
		}
		spin_unlock_irqrestore(&msb->q_lock, flags);

		if (rc)
			break;

		wait_for_completion(&card->mrq_complete);
	}
}

static void mspro_block_start(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	unsigned long flags;

	spin_lock_irqsave(&msb->q_lock, flags);
	blk_start_queue(msb->queue);
	spin_unlock_irqrestore(&msb->q_lock, flags);
}

static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
{
	if (req->cmd_type != REQ_TYPE_FS &&
	    req->cmd_type != REQ_TYPE_BLOCK_PC) {
		blk_dump_rq_flags(req, "MSPro unsupported request");
		return BLKPREP_KILL;
	}

	req->cmd_flags |= REQ_DONTPREP;

	return BLKPREP_OK;
}

static void mspro_block_submit_req(struct request_queue *q)
{
	struct memstick_dev *card = q->queuedata;
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	struct request *req = NULL;

	if (msb->has_request)
		return;

	if (msb->eject) {
		while ((req = blk_fetch_request(q)) != NULL)
			__blk_end_request_all(req, -ENODEV);

		return;
	}

	msb->has_request = 1;
	if (mspro_block_issue_req(card, 0))
		msb->has_request = 0;
}

/*** Initialization ***/

static int mspro_block_wait_for_ced(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);

	card->next_request = h_mspro_block_req_init;
	msb->mrq_handler = h_mspro_block_wait_for_ced;
	memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
	memstick_new_req(card->host);
	wait_for_completion(&card->mrq_complete);
	return card->current_mrq.error;
}

static int mspro_block_set_interface(struct memstick_dev *card,
				     unsigned char sys_reg)
{
	struct memstick_host *host = card->host;
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	struct mspro_param_register param = {
		.system = sys_reg,
		.data_count = 0,
		.data_address = 0,
		.tpc_param = 0
	};

	card->next_request = h_mspro_block_req_init;
	msb->mrq_handler = h_mspro_block_default;
	memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
			  sizeof(param));
	memstick_new_req(host);
	wait_for_completion(&card->mrq_complete);
	return card->current_mrq.error;
}

static int mspro_block_switch_interface(struct memstick_dev *card)
{
	struct memstick_host *host = card->host;
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	int rc = 0;

try_again:
	if (msb->caps & MEMSTICK_CAP_PAR4)
		rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
	else
		return 0;

	if (rc) {
		printk(KERN_WARNING
		       "%s: could not switch to 4-bit mode, error %d\n",
		       dev_name(&card->dev), rc);
		return 0;
	}

	msb->system = MEMSTICK_SYS_PAR4;
	host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
	printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
	       dev_name(&card->dev));

	if (msb->caps & MEMSTICK_CAP_PAR8) {
		rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);

		if (!rc) {
			msb->system = MEMSTICK_SYS_PAR8;
			host->set_param(host, MEMSTICK_INTERFACE,
					MEMSTICK_PAR8);
			printk(KERN_INFO
			       "%s: switching to 8-bit parallel mode\n",
			       dev_name(&card->dev));
		} else
			printk(KERN_WARNING
			       "%s: could not switch to 8-bit mode, error %d\n",
			       dev_name(&card->dev), rc);
	}

	card->next_request = h_mspro_block_req_init;
	msb->mrq_handler = h_mspro_block_default;
	memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
	memstick_new_req(card->host);
	wait_for_completion(&card->mrq_complete);
	rc = card->current_mrq.error;

	if (rc) {
		printk(KERN_WARNING
		       "%s: interface error, trying to fall back to serial\n",
		       dev_name(&card->dev));
		msb->system = MEMSTICK_SYS_SERIAL;
		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
		msleep(10);
		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
		host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);

		rc = memstick_set_rw_addr(card);
		if (!rc)
			rc = mspro_block_set_interface(card, msb->system);

		if (!rc) {
			msleep(150);
			rc = mspro_block_wait_for_ced(card);
			if (rc)
				return rc;

			if (msb->caps & MEMSTICK_CAP_PAR8) {
				msb->caps &= ~MEMSTICK_CAP_PAR8;
				goto try_again;
			}
		}
	}
	return rc;
}

/* Memory allocated for attributes by this function should be freed by
 * mspro_block_data_clear, no matter if the initialization process succeeded
 * or failed.
 */
static int mspro_block_read_attributes(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	struct mspro_attribute *attr = NULL;
	struct mspro_sys_attr *s_attr = NULL;
	unsigned char *buffer = NULL;
	int cnt, rc, attr_count;
	/* While normally physical device offsets, represented here by
	 * attr_offset and attr_len will be of large numeric types, we can be
	 * sure, that attributes are close enough to the beginning of the
	 * device, to save ourselves some trouble.
	 */
	unsigned int addr, attr_offset = 0, attr_len = msb->page_size;

	attr = kmalloc(msb->page_size, GFP_KERNEL);
	if (!attr)
		return -ENOMEM;

	sg_init_one(&msb->req_sg[0], attr, msb->page_size);
	msb->seg_count = 1;
	msb->current_seg = 0;
	msb->current_page = 0;
	msb->data_dir = READ;
	msb->transfer_cmd = MSPRO_CMD_READ_ATRB;

	msb->setup_transfer(card, attr_offset, attr_len);

	memstick_new_req(card->host);
	wait_for_completion(&card->mrq_complete);
	if (card->current_mrq.error) {
		rc = card->current_mrq.error;
		goto out_free_attr;
	}

	if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
		printk(KERN_ERR "%s: unrecognized device signature %x\n",
		       dev_name(&card->dev), be16_to_cpu(attr->signature));
		rc = -ENODEV;
		goto out_free_attr;
	}

	if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
		printk(KERN_WARNING "%s: way too many attribute entries\n",
		       dev_name(&card->dev));
		attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
	} else
		attr_count = attr->count;

	msb->attr_group.attrs = kcalloc(attr_count + 1,
					sizeof(*msb->attr_group.attrs),
					GFP_KERNEL);
	if (!msb->attr_group.attrs) {
		rc = -ENOMEM;
		goto out_free_attr;
	}
	msb->attr_group.name = "media_attributes";

	buffer = kmemdup(attr, attr_len, GFP_KERNEL);
	if (!buffer) {
		rc = -ENOMEM;
		goto out_free_attr;
	}

	for (cnt = 0; cnt < attr_count; ++cnt) {
		s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
		if (!s_attr) {
			rc = -ENOMEM;
			goto out_free_buffer;
		}

		msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
		addr = be32_to_cpu(attr->entries[cnt].address);
		s_attr->size = be32_to_cpu(attr->entries[cnt].size);
		dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
			"size %zx\n", cnt, attr->entries[cnt].id, addr,
			s_attr->size);
		s_attr->id = attr->entries[cnt].id;
		if (mspro_block_attr_name(s_attr->id))
			snprintf(s_attr->name, sizeof(s_attr->name), "%s",
				 mspro_block_attr_name(attr->entries[cnt].id));
		else
			snprintf(s_attr->name, sizeof(s_attr->name),
				 "attr_x%02x", attr->entries[cnt].id);

		sysfs_attr_init(&s_attr->dev_attr.attr);
		s_attr->dev_attr.attr.name = s_attr->name;
		s_attr->dev_attr.attr.mode = S_IRUGO;
		s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);

		if (!s_attr->size)
			continue;

		s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
		if (!s_attr->data) {
			rc = -ENOMEM;
			goto out_free_buffer;
		}

		if (((addr / msb->page_size) == (attr_offset / msb->page_size))
		    && (((addr + s_attr->size - 1) / msb->page_size)
			== (attr_offset / msb->page_size))) {
			memcpy(s_attr->data, buffer + addr % msb->page_size,
			       s_attr->size);
			continue;
		}

		attr_offset = (addr / msb->page_size) * msb->page_size;

		if ((attr_offset + attr_len) < (addr + s_attr->size)) {
			kfree(buffer);
			attr_len = (((addr + s_attr->size) / msb->page_size)
				    + 1 ) * msb->page_size - attr_offset;
			buffer = kmalloc(attr_len, GFP_KERNEL);
			if (!buffer) {
				rc = -ENOMEM;
				goto out_free_attr;
			}
		}

		sg_init_one(&msb->req_sg[0], buffer, attr_len);
		msb->seg_count = 1;
		msb->current_seg = 0;
		msb->current_page = 0;
		msb->data_dir = READ;
		msb->transfer_cmd = MSPRO_CMD_READ_ATRB;

		dev_dbg(&card->dev, "reading attribute range %x, %x\n",
			attr_offset, attr_len);

		msb->setup_transfer(card, attr_offset, attr_len);
		memstick_new_req(card->host);
		wait_for_completion(&card->mrq_complete);
		if (card->current_mrq.error) {
			rc = card->current_mrq.error;
			goto out_free_buffer;
		}

		memcpy(s_attr->data, buffer + addr % msb->page_size,
		       s_attr->size);
	}

	rc = 0;
out_free_buffer:
	kfree(buffer);
out_free_attr:
	kfree(attr);
	return rc;
}

static int mspro_block_init_card(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	struct memstick_host *host = card->host;
	int rc = 0;

	msb->system = MEMSTICK_SYS_SERIAL;
	msb->setup_transfer = h_mspro_block_setup_cmd;

	card->reg_addr.r_offset = offsetof(struct mspro_register, status);
	card->reg_addr.r_length = sizeof(struct ms_status_register);
	card->reg_addr.w_offset = offsetof(struct mspro_register, param);
	card->reg_addr.w_length = sizeof(struct mspro_param_register);

	if (memstick_set_rw_addr(card))
		return -EIO;

	msb->caps = host->caps;

	msleep(150);
	rc = mspro_block_wait_for_ced(card);
	if (rc)
		return rc;

	rc = mspro_block_switch_interface(card);
	if (rc)
		return rc;

	dev_dbg(&card->dev, "card activated\n");
	if (msb->system != MEMSTICK_SYS_SERIAL)
		msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;

	card->next_request = h_mspro_block_req_init;
	msb->mrq_handler = h_mspro_block_get_ro;
	memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
			  sizeof(struct ms_status_register));
	memstick_new_req(card->host);
	wait_for_completion(&card->mrq_complete);
	if (card->current_mrq.error)
		return card->current_mrq.error;

	dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);

	msb->page_size = 512;
	rc = mspro_block_read_attributes(card);
	if (rc)
		return rc;

	dev_dbg(&card->dev, "attributes loaded\n");
	return 0;

}

static int mspro_block_init_disk(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	struct memstick_host *host = card->host;
	struct mspro_devinfo *dev_info = NULL;
	struct mspro_sys_info *sys_info = NULL;
	struct mspro_sys_attr *s_attr = NULL;
	int rc, disk_id;
	u64 limit = BLK_BOUNCE_HIGH;
	unsigned long capacity;

	if (host->dev.dma_mask && *(host->dev.dma_mask))
		limit = *(host->dev.dma_mask);

	for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
		s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);

		if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
			dev_info = s_attr->data;
		else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
			sys_info = s_attr->data;
	}

	if (!dev_info || !sys_info)
		return -ENODEV;

	msb->cylinders = be16_to_cpu(dev_info->cylinders);
	msb->heads = be16_to_cpu(dev_info->heads);
	msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);

	msb->page_size = be16_to_cpu(sys_info->unit_size);

	mutex_lock(&mspro_block_disk_lock);
	disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
	mutex_unlock(&mspro_block_disk_lock);
	if (disk_id < 0)
		return disk_id;

	msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
	if (!msb->disk) {
		rc = -ENOMEM;
		goto out_release_id;
	}

	msb->queue = blk_init_queue(mspro_block_submit_req, &msb->q_lock);
	if (!msb->queue) {
		rc = -ENOMEM;
		goto out_put_disk;
	}

	msb->queue->queuedata = card;
	blk_queue_prep_rq(msb->queue, mspro_block_prepare_req);

	blk_queue_bounce_limit(msb->queue, limit);
	blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
	blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
	blk_queue_max_segment_size(msb->queue,
				   MSPRO_BLOCK_MAX_PAGES * msb->page_size);

	msb->disk->major = major;
	msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
	msb->disk->fops = &ms_block_bdops;
	msb->usage_count = 1;
	msb->disk->private_data = msb;
	msb->disk->queue = msb->queue;
	msb->disk->driverfs_dev = &card->dev;

	sprintf(msb->disk->disk_name, "mspblk%d", disk_id);

	blk_queue_logical_block_size(msb->queue, msb->page_size);

	capacity = be16_to_cpu(sys_info->user_block_count);
	capacity *= be16_to_cpu(sys_info->block_size);
	capacity *= msb->page_size >> 9;
	set_capacity(msb->disk, capacity);
	dev_dbg(&card->dev, "capacity set %ld\n", capacity);

	add_disk(msb->disk);
	msb->active = 1;
	return 0;

out_put_disk:
	put_disk(msb->disk);
out_release_id:
	mutex_lock(&mspro_block_disk_lock);
	idr_remove(&mspro_block_disk_idr, disk_id);
	mutex_unlock(&mspro_block_disk_lock);
	return rc;
}

static void mspro_block_data_clear(struct mspro_block_data *msb)
{
	int cnt;
	struct mspro_sys_attr *s_attr;

	if (msb->attr_group.attrs) {
		for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
			s_attr = mspro_from_sysfs_attr(msb->attr_group
							   .attrs[cnt]);
			kfree(s_attr->data);
			kfree(s_attr);
		}
		kfree(msb->attr_group.attrs);
	}

	msb->card = NULL;
}

static int mspro_block_check_card(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);

	return (msb->active == 1);
}

static int mspro_block_probe(struct memstick_dev *card)
{
	struct mspro_block_data *msb;
	int rc = 0;

	msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
	if (!msb)
		return -ENOMEM;
	memstick_set_drvdata(card, msb);
	msb->card = card;
	spin_lock_init(&msb->q_lock);

	rc = mspro_block_init_card(card);

	if (rc)
		goto out_free;

	rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
	if (rc)
		goto out_free;

	rc = mspro_block_init_disk(card);
	if (!rc) {
		card->check = mspro_block_check_card;
		card->stop = mspro_block_stop;
		card->start = mspro_block_start;
		return 0;
	}

	sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
out_free:
	memstick_set_drvdata(card, NULL);
	mspro_block_data_clear(msb);
	kfree(msb);
	return rc;
}

static void mspro_block_remove(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	unsigned long flags;

	spin_lock_irqsave(&msb->q_lock, flags);
	msb->eject = 1;
	blk_start_queue(msb->queue);
	spin_unlock_irqrestore(&msb->q_lock, flags);

	del_gendisk(msb->disk);
	dev_dbg(&card->dev, "mspro block remove\n");

	blk_cleanup_queue(msb->queue);
	msb->queue = NULL;

	sysfs_remove_group(&card->dev.kobj, &msb->attr_group);

	mutex_lock(&mspro_block_disk_lock);
	mspro_block_data_clear(msb);
	mutex_unlock(&mspro_block_disk_lock);

	mspro_block_disk_release(msb->disk);
	memstick_set_drvdata(card, NULL);
}

#ifdef CONFIG_PM

static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	unsigned long flags;

	spin_lock_irqsave(&msb->q_lock, flags);
	blk_stop_queue(msb->queue);
	msb->active = 0;
	spin_unlock_irqrestore(&msb->q_lock, flags);

	return 0;
}

static int mspro_block_resume(struct memstick_dev *card)
{
	struct mspro_block_data *msb = memstick_get_drvdata(card);
	unsigned long flags;
	int rc = 0;

#ifdef CONFIG_MEMSTICK_UNSAFE_RESUME

	struct mspro_block_data *new_msb;
	struct memstick_host *host = card->host;
	struct mspro_sys_attr *s_attr, *r_attr;
	unsigned char cnt;

	mutex_lock(&host->lock);
	new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
	if (!new_msb) {
		rc = -ENOMEM;
		goto out_unlock;
	}

	new_msb->card = card;
	memstick_set_drvdata(card, new_msb);
	if (mspro_block_init_card(card))
		goto out_free;

	for (cnt = 0; new_msb->attr_group.attrs[cnt]
		      && msb->attr_group.attrs[cnt]; ++cnt) {
		s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
		r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);

		if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
		    && r_attr->id == s_attr->id) {
			if (memcmp(s_attr->data, r_attr->data, s_attr->size))
				break;

			msb->active = 1;
			break;
		}
	}

out_free:
	memstick_set_drvdata(card, msb);
	mspro_block_data_clear(new_msb);
	kfree(new_msb);
out_unlock:
	mutex_unlock(&host->lock);

#endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */

	spin_lock_irqsave(&msb->q_lock, flags);
	blk_start_queue(msb->queue);
	spin_unlock_irqrestore(&msb->q_lock, flags);
	return rc;
}

#else

#define mspro_block_suspend NULL
#define mspro_block_resume NULL

#endif /* CONFIG_PM */

static struct memstick_device_id mspro_block_id_tbl[] = {
	{MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
	 MEMSTICK_CLASS_DUO},
	{}
};


static struct memstick_driver mspro_block_driver = {
	.driver = {
		.name  = DRIVER_NAME,
		.owner = THIS_MODULE
	},
	.id_table = mspro_block_id_tbl,
	.probe    = mspro_block_probe,
	.remove   = mspro_block_remove,
	.suspend  = mspro_block_suspend,
	.resume   = mspro_block_resume
};

static int __init mspro_block_init(void)
{
	int rc = -ENOMEM;

	rc = register_blkdev(major, DRIVER_NAME);
	if (rc < 0) {
		printk(KERN_ERR DRIVER_NAME ": failed to register "
		       "major %d, error %d\n", major, rc);
		return rc;
	}
	if (!major)
		major = rc;

	rc = memstick_register_driver(&mspro_block_driver);
	if (rc)
		unregister_blkdev(major, DRIVER_NAME);
	return rc;
}

static void __exit mspro_block_exit(void)
{
	memstick_unregister_driver(&mspro_block_driver);
	unregister_blkdev(major, DRIVER_NAME);
	idr_destroy(&mspro_block_disk_idr);
}

module_init(mspro_block_init);
module_exit(mspro_block_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alex Dubov");
MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);