summaryrefslogtreecommitdiff
path: root/drivers/usb/storage/ene_ub6250.c
blob: 31645afff5fca25d4b89b9a3d0097ae78d29c2f5 (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
/*
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/slab.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>

#include <linux/firmware.h>

#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "debug.h"

MODULE_DESCRIPTION("Driver for ENE UB6250 reader");
MODULE_LICENSE("GPL");


/*
 * The table of devices
 */
#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
		    vendorName, productName, useProtocol, useTransport, \
		    initFunction, flags) \
{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
	.driver_info = (flags)|(USB_US_TYPE_STOR<<24) }

struct usb_device_id ene_ub6250_usb_ids[] = {
#	include "unusual_ene_ub6250.h"
	{ }		/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, ene_ub6250_usb_ids);

#undef UNUSUAL_DEV

/*
 * The flags table
 */
#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
		    vendor_name, product_name, use_protocol, use_transport, \
		    init_function, Flags) \
{ \
	.vendorName = vendor_name,	\
	.productName = product_name,	\
	.useProtocol = use_protocol,	\
	.useTransport = use_transport,	\
	.initFunction = init_function,	\
}

static struct us_unusual_dev ene_ub6250_unusual_dev_list[] = {
#	include "unusual_ene_ub6250.h"
	{ }		/* Terminating entry */
};

#undef UNUSUAL_DEV



/* ENE bin code len */
#define ENE_BIN_CODE_LEN    0x800
/* EnE HW Register */
#define REG_CARD_STATUS     0xFF83
#define REG_HW_TRAP1        0xFF89

/* SRB Status */
#define SS_SUCCESS                  0x00      /* No Sense */
#define SS_NOT_READY                0x02
#define SS_MEDIUM_ERR               0x03
#define SS_HW_ERR                   0x04
#define SS_ILLEGAL_REQUEST          0x05
#define SS_UNIT_ATTENTION           0x06

/* ENE Load FW Pattern */
#define SD_INIT1_PATTERN   1
#define SD_INIT2_PATTERN   2
#define SD_RW_PATTERN      3
#define MS_INIT_PATTERN    4
#define MSP_RW_PATTERN     5
#define MS_RW_PATTERN      6
#define SM_INIT_PATTERN    7
#define SM_RW_PATTERN      8

#define FDIR_WRITE         0
#define FDIR_READ          1


struct SD_STATUS {
	u8    Insert:1;
	u8    Ready:1;
	u8    MediaChange:1;
	u8    IsMMC:1;
	u8    HiCapacity:1;
	u8    HiSpeed:1;
	u8    WtP:1;
	u8    Reserved:1;
};

struct MS_STATUS {
	u8    Insert:1;
	u8    Ready:1;
	u8    MediaChange:1;
	u8    IsMSPro:1;
	u8    IsMSPHG:1;
	u8    Reserved1:1;
	u8    WtP:1;
	u8    Reserved2:1;
};

struct SM_STATUS {
	u8    Insert:1;
	u8    Ready:1;
	u8    MediaChange:1;
	u8    Reserved:3;
	u8    WtP:1;
	u8    IsMS:1;
};


/* SD Block Length */
/* 2^9 = 512 Bytes, The HW maximum read/write data length */
#define SD_BLOCK_LEN  9

struct ene_ub6250_info {
	/* for 6250 code */
	struct SD_STATUS	SD_Status;
	struct MS_STATUS	MS_Status;
	struct SM_STATUS	SM_Status;

	/* ----- SD Control Data ---------------- */
	/*SD_REGISTER SD_Regs; */
	u16		SD_Block_Mult;
	u8		SD_READ_BL_LEN;
	u16		SD_C_SIZE;
	u8		SD_C_SIZE_MULT;

	/* SD/MMC New spec. */
	u8		SD_SPEC_VER;
	u8		SD_CSD_VER;
	u8		SD20_HIGH_CAPACITY;
	u32		HC_C_SIZE;
	u8		MMC_SPEC_VER;
	u8		MMC_BusWidth;
	u8		MMC_HIGH_CAPACITY;

	/*----- MS Control Data ---------------- */
	bool		MS_SWWP;
	u32		MSP_TotalBlock;
	/*MS_LibControl       MS_Lib;*/
	bool		MS_IsRWPage;
	u16		MS_Model;

	/*----- SM Control Data ---------------- */
	u8		SM_DeviceID;
	u8		SM_CardID;

	unsigned char	*testbuf;
	u8		BIN_FLAG;
	u32		bl_num;
	int		SrbStatus;

	/*------Power Managerment ---------------*/
	bool		Power_IsResum;
};

static int ene_sd_init(struct us_data *us);
static int ene_load_bincode(struct us_data *us, unsigned char flag);

static void ene_ub6250_info_destructor(void *extra)
{
	if (!extra)
		return;
}

static int ene_send_scsi_cmd(struct us_data *us, u8 fDir, void *buf, int use_sg)
{
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;

	int result;
	unsigned int residue;
	unsigned int cswlen = 0, partial = 0;
	unsigned int transfer_length = bcb->DataTransferLength;

	/* US_DEBUGP("transport --- ene_send_scsi_cmd\n"); */
	/* send cmd to out endpoint */
	result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
					    bcb, US_BULK_CB_WRAP_LEN, NULL);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("send cmd to out endpoint fail ---\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (buf) {
		unsigned int pipe = fDir;

		if (fDir  == FDIR_READ)
			pipe = us->recv_bulk_pipe;
		else
			pipe = us->send_bulk_pipe;

		/* Bulk */
		if (use_sg) {
			result = usb_stor_bulk_srb(us, pipe, us->srb);
		} else {
			result = usb_stor_bulk_transfer_sg(us, pipe, buf,
						transfer_length, 0, &partial);
		}
		if (result != USB_STOR_XFER_GOOD) {
			US_DEBUGP("data transfer fail ---\n");
			return USB_STOR_TRANSPORT_ERROR;
		}
	}

	/* Get CSW for device status */
	result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
					    US_BULK_CS_WRAP_LEN, &cswlen);

	if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
		US_DEBUGP("Received 0-length CSW; retrying...\n");
		result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
					    bcs, US_BULK_CS_WRAP_LEN, &cswlen);
	}

	if (result == USB_STOR_XFER_STALLED) {
		/* get the status again */
		US_DEBUGP("Attempting to get CSW (2nd try)...\n");
		result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
						bcs, US_BULK_CS_WRAP_LEN, NULL);
	}

	if (result != USB_STOR_XFER_GOOD)
		return USB_STOR_TRANSPORT_ERROR;

	/* check bulk status */
	residue = le32_to_cpu(bcs->Residue);

	/* try to compute the actual residue, based on how much data
	 * was really transferred and what the device tells us */
	if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
		residue = min(residue, transfer_length);
		if (us->srb != NULL)
			scsi_set_resid(us->srb, max(scsi_get_resid(us->srb),
								(int)residue));
	}

	if (bcs->Status != US_BULK_STAT_OK)
		return USB_STOR_TRANSPORT_ERROR;

	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_test_unit_ready(struct us_data *us, struct scsi_cmnd *srb)
{
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	if (info->SD_Status.Insert && info->SD_Status.Ready)
		return USB_STOR_TRANSPORT_GOOD;
	else {
		ene_sd_init(us);
		return USB_STOR_TRANSPORT_GOOD;
	}

	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_inquiry(struct us_data *us, struct scsi_cmnd *srb)
{
	unsigned char data_ptr[36] = {
		0x00, 0x80, 0x02, 0x00, 0x1F, 0x00, 0x00, 0x00, 0x55,
		0x53, 0x42, 0x32, 0x2E, 0x30, 0x20, 0x20, 0x43, 0x61,
		0x72, 0x64, 0x52, 0x65, 0x61, 0x64, 0x65, 0x72, 0x20,
		0x20, 0x20, 0x20, 0x20, 0x20, 0x30, 0x31, 0x30, 0x30 };

	usb_stor_set_xfer_buf(data_ptr, 36, srb);
	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_mode_sense(struct us_data *us, struct scsi_cmnd *srb)
{
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
	unsigned char mediaNoWP[12] = {
		0x0b, 0x00, 0x00, 0x08, 0x00, 0x00,
		0x71, 0xc0, 0x00, 0x00, 0x02, 0x00 };
	unsigned char mediaWP[12]   = {
		0x0b, 0x00, 0x80, 0x08, 0x00, 0x00,
		0x71, 0xc0, 0x00, 0x00, 0x02, 0x00 };

	if (info->SD_Status.WtP)
		usb_stor_set_xfer_buf(mediaWP, 12, srb);
	else
		usb_stor_set_xfer_buf(mediaNoWP, 12, srb);


	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_read_capacity(struct us_data *us, struct scsi_cmnd *srb)
{
	u32   bl_num;
	u16    bl_len;
	unsigned int offset = 0;
	unsigned char    buf[8];
	struct scatterlist *sg = NULL;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	US_DEBUGP("sd_scsi_read_capacity\n");
	if (info->SD_Status.HiCapacity) {
		bl_len = 0x200;
		if (info->SD_Status.IsMMC)
			bl_num = info->HC_C_SIZE-1;
		else
			bl_num = (info->HC_C_SIZE + 1) * 1024 - 1;
	} else {
		bl_len = 1<<(info->SD_READ_BL_LEN);
		bl_num = info->SD_Block_Mult * (info->SD_C_SIZE + 1)
				* (1 << (info->SD_C_SIZE_MULT + 2)) - 1;
	}
	info->bl_num = bl_num;
	US_DEBUGP("bl_len = %x\n", bl_len);
	US_DEBUGP("bl_num = %x\n", bl_num);

	/*srb->request_bufflen = 8; */
	buf[0] = (bl_num >> 24) & 0xff;
	buf[1] = (bl_num >> 16) & 0xff;
	buf[2] = (bl_num >> 8) & 0xff;
	buf[3] = (bl_num >> 0) & 0xff;
	buf[4] = (bl_len >> 24) & 0xff;
	buf[5] = (bl_len >> 16) & 0xff;
	buf[6] = (bl_len >> 8) & 0xff;
	buf[7] = (bl_len >> 0) & 0xff;

	usb_stor_access_xfer_buf(buf, 8, srb, &sg, &offset, TO_XFER_BUF);

	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_read(struct us_data *us, struct scsi_cmnd *srb)
{
	int result;
	unsigned char *cdb = srb->cmnd;
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	u32 bn = ((cdb[2] << 24) & 0xff000000) | ((cdb[3] << 16) & 0x00ff0000) |
		 ((cdb[4] << 8) & 0x0000ff00) | ((cdb[5] << 0) & 0x000000ff);
	u16 blen = ((cdb[7] << 8) & 0xff00) | ((cdb[8] << 0) & 0x00ff);
	u32 bnByte = bn * 0x200;
	u32 blenByte = blen * 0x200;

	if (bn > info->bl_num)
		return USB_STOR_TRANSPORT_ERROR;

	result = ene_load_bincode(us, SD_RW_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD RW pattern Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (info->SD_Status.HiCapacity)
		bnByte = bn;

	/* set up the command wrapper */
	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = blenByte;
	bcb->Flags  = 0x80;
	bcb->CDB[0] = 0xF1;
	bcb->CDB[5] = (unsigned char)(bnByte);
	bcb->CDB[4] = (unsigned char)(bnByte>>8);
	bcb->CDB[3] = (unsigned char)(bnByte>>16);
	bcb->CDB[2] = (unsigned char)(bnByte>>24);

	result = ene_send_scsi_cmd(us, FDIR_READ, scsi_sglist(srb), 1);
	return result;
}

static int sd_scsi_write(struct us_data *us, struct scsi_cmnd *srb)
{
	int result;
	unsigned char *cdb = srb->cmnd;
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	u32 bn = ((cdb[2] << 24) & 0xff000000) | ((cdb[3] << 16) & 0x00ff0000) |
		 ((cdb[4] << 8) & 0x0000ff00) | ((cdb[5] << 0) & 0x000000ff);
	u16 blen = ((cdb[7] << 8) & 0xff00) | ((cdb[8] << 0) & 0x00ff);
	u32 bnByte = bn * 0x200;
	u32 blenByte = blen * 0x200;

	if (bn > info->bl_num)
		return USB_STOR_TRANSPORT_ERROR;

	result = ene_load_bincode(us, SD_RW_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD RW pattern Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (info->SD_Status.HiCapacity)
		bnByte = bn;

	/* set up the command wrapper */
	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = blenByte;
	bcb->Flags  = 0x00;
	bcb->CDB[0] = 0xF0;
	bcb->CDB[5] = (unsigned char)(bnByte);
	bcb->CDB[4] = (unsigned char)(bnByte>>8);
	bcb->CDB[3] = (unsigned char)(bnByte>>16);
	bcb->CDB[2] = (unsigned char)(bnByte>>24);

	result = ene_send_scsi_cmd(us, FDIR_WRITE, scsi_sglist(srb), 1);
	return result;
}

static int ene_get_card_type(struct us_data *us, u16 index, void *buf)
{
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	int result;

	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength	= 0x01;
	bcb->Flags			= 0x80;
	bcb->CDB[0]			= 0xED;
	bcb->CDB[2]			= (unsigned char)(index>>8);
	bcb->CDB[3]			= (unsigned char)index;

	result = ene_send_scsi_cmd(us, FDIR_READ, buf, 0);
	return result;
}

static int ene_get_card_status(struct us_data *us, u8 *buf)
{
	u16 tmpreg;
	u32 reg4b;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	/*US_DEBUGP("transport --- ENE_ReadSDReg\n");*/
	reg4b = *(u32 *)&buf[0x18];
	info->SD_READ_BL_LEN = (u8)((reg4b >> 8) & 0x0f);

	tmpreg = (u16) reg4b;
	reg4b = *(u32 *)(&buf[0x14]);
	if (info->SD_Status.HiCapacity && !info->SD_Status.IsMMC)
		info->HC_C_SIZE = (reg4b >> 8) & 0x3fffff;

	info->SD_C_SIZE = ((tmpreg & 0x03) << 10) | (u16)(reg4b >> 22);
	info->SD_C_SIZE_MULT = (u8)(reg4b >> 7)  & 0x07;
	if (info->SD_Status.HiCapacity && info->SD_Status.IsMMC)
		info->HC_C_SIZE = *(u32 *)(&buf[0x100]);

	if (info->SD_READ_BL_LEN > SD_BLOCK_LEN) {
		info->SD_Block_Mult = 1 << (info->SD_READ_BL_LEN-SD_BLOCK_LEN);
		info->SD_READ_BL_LEN = SD_BLOCK_LEN;
	} else {
		info->SD_Block_Mult = 1;
	}

	return USB_STOR_TRANSPORT_GOOD;
}

static int ene_load_bincode(struct us_data *us, unsigned char flag)
{
	int err;
	char *fw_name = NULL;
	unsigned char *buf = NULL;
	const struct firmware *sd_fw = NULL;
	int result = USB_STOR_TRANSPORT_ERROR;
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	if (info->BIN_FLAG == flag)
		return USB_STOR_TRANSPORT_GOOD;

	switch (flag) {
	/* For SD */
	case SD_INIT1_PATTERN:
		US_DEBUGP("SD_INIT1_PATTERN\n");
		fw_name = "ene-ub6250/sd_init1.bin";
		break;
	case SD_INIT2_PATTERN:
		US_DEBUGP("SD_INIT2_PATTERN\n");
		fw_name = "ene-ub6250/sd_init2.bin";
		break;
	case SD_RW_PATTERN:
		US_DEBUGP("SD_RDWR_PATTERN\n");
		fw_name = "ene-ub6250/sd_rdwr.bin";
		break;
	default:
		US_DEBUGP("----------- Unknown PATTERN ----------\n");
		goto nofw;
	}

	err = request_firmware(&sd_fw, fw_name, &us->pusb_dev->dev);
	if (err) {
		US_DEBUGP("load firmware %s failed\n", fw_name);
		goto nofw;
	}
	buf = kmalloc(sd_fw->size, GFP_KERNEL);
	if (buf == NULL) {
		US_DEBUGP("Malloc memory for fireware failed!\n");
		goto nofw;
	}
	memcpy(buf, sd_fw->data, sd_fw->size);
	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = sd_fw->size;
	bcb->Flags = 0x00;
	bcb->CDB[0] = 0xEF;

	result = ene_send_scsi_cmd(us, FDIR_WRITE, buf, 0);
	info->BIN_FLAG = flag;
	kfree(buf);

nofw:
	if (sd_fw != NULL) {
		release_firmware(sd_fw);
		sd_fw = NULL;
	}

	return result;
}

static int ene_sd_init(struct us_data *us)
{
	int result;
	u8  buf[0x200];
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	US_DEBUGP("transport --- ENE_SDInit\n");
	/* SD Init Part-1 */
	result = ene_load_bincode(us, SD_INIT1_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD Init Code Part-1 Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->Flags = 0x80;
	bcb->CDB[0] = 0xF2;

	result = ene_send_scsi_cmd(us, FDIR_READ, NULL, 0);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Execution SD Init Code Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	/* SD Init Part-2 */
	result = ene_load_bincode(us, SD_INIT2_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD Init Code Part-2 Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = 0x200;
	bcb->Flags              = 0x80;
	bcb->CDB[0]             = 0xF1;

	result = ene_send_scsi_cmd(us, FDIR_READ, &buf, 0);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Execution SD Init Code Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	info->SD_Status =  *(struct SD_STATUS *)&buf[0];
	if (info->SD_Status.Insert && info->SD_Status.Ready) {
		ene_get_card_status(us, (unsigned char *)&buf);
		US_DEBUGP("Insert     = %x\n", info->SD_Status.Insert);
		US_DEBUGP("Ready      = %x\n", info->SD_Status.Ready);
		US_DEBUGP("IsMMC      = %x\n", info->SD_Status.IsMMC);
		US_DEBUGP("HiCapacity = %x\n", info->SD_Status.HiCapacity);
		US_DEBUGP("HiSpeed    = %x\n", info->SD_Status.HiSpeed);
		US_DEBUGP("WtP        = %x\n", info->SD_Status.WtP);
	} else {
		US_DEBUGP("SD Card Not Ready --- %x\n", buf[0]);
		return USB_STOR_TRANSPORT_ERROR;
	}
	return USB_STOR_TRANSPORT_GOOD;
}


static int ene_init(struct us_data *us)
{
	int result;
	u8  misc_reg03 = 0;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);

	result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
	if (result != USB_STOR_XFER_GOOD)
		return USB_STOR_TRANSPORT_ERROR;

	if (misc_reg03 & 0x01) {
		if (!info->SD_Status.Ready) {
			result = ene_sd_init(us);
			if (result != USB_STOR_XFER_GOOD)
				return USB_STOR_TRANSPORT_ERROR;
		}
	}

	return result;
}

/*----- sd_scsi_irp() ---------*/
static int sd_scsi_irp(struct us_data *us, struct scsi_cmnd *srb)
{
	int    result;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)us->extra;

	info->SrbStatus = SS_SUCCESS;
	switch (srb->cmnd[0]) {
	case TEST_UNIT_READY:
		result = sd_scsi_test_unit_ready(us, srb);
		break; /* 0x00 */
	case INQUIRY:
		result = sd_scsi_inquiry(us, srb);
		break; /* 0x12 */
	case MODE_SENSE:
		result = sd_scsi_mode_sense(us, srb);
		break; /* 0x1A */
	/*
	case START_STOP:
		result = SD_SCSI_Start_Stop(us, srb);
		break; //0x1B
	*/
	case READ_CAPACITY:
		result = sd_scsi_read_capacity(us, srb);
		break; /* 0x25 */
	case READ_10:
		result = sd_scsi_read(us, srb);
		break; /* 0x28 */
	case WRITE_10:
		result = sd_scsi_write(us, srb);
		break; /* 0x2A */
	default:
		info->SrbStatus = SS_ILLEGAL_REQUEST;
		result = USB_STOR_TRANSPORT_FAILED;
		break;
	}
	return result;
}

static int ene_transport(struct scsi_cmnd *srb, struct us_data *us)
{
	int result = 0;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);

	/*US_DEBUG(usb_stor_show_command(srb)); */
	scsi_set_resid(srb, 0);
	if (unlikely(!info->SD_Status.Ready))
		result = ene_init(us);
	else
		result = sd_scsi_irp(us, srb);

	return 0;
}


static int ene_ub6250_probe(struct usb_interface *intf,
			 const struct usb_device_id *id)
{
	int result;
	u8  misc_reg03 = 0;
	struct us_data *us;

	result = usb_stor_probe1(&us, intf, id,
		   (id - ene_ub6250_usb_ids) + ene_ub6250_unusual_dev_list);
	if (result)
		return result;

	/* FIXME: where should the code alloc extra buf ? */
	if (!us->extra) {
		us->extra = kzalloc(sizeof(struct ene_ub6250_info), GFP_KERNEL);
		if (!us->extra)
			return -ENOMEM;
		us->extra_destructor = ene_ub6250_info_destructor;
	}

	us->transport_name = "ene_ub6250";
	us->transport = ene_transport;
	us->max_lun = 0;

	result = usb_stor_probe2(us);
	if (result)
		return result;

	/* probe card type */
	result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
	if (result != USB_STOR_XFER_GOOD) {
		usb_stor_disconnect(intf);
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (!(misc_reg03 & 0x01)) {
		result = -ENODEV;
		printk(KERN_NOTICE "ums_eneub6250: The driver only supports SD card. "
		       "To use SM/MS card, please build driver/staging/keucr\n");
		usb_stor_disconnect(intf);
	}

	return result;
}


#ifdef CONFIG_PM

static int ene_ub6250_resume(struct usb_interface *iface)
{
	u8 tmp = 0;
	struct us_data *us = usb_get_intfdata(iface);
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);

	mutex_lock(&us->dev_mutex);

	US_DEBUGP("%s\n", __func__);
	if (us->suspend_resume_hook)
		(us->suspend_resume_hook)(us, US_RESUME);

	mutex_unlock(&us->dev_mutex);

	info->Power_IsResum = true;
	/*info->SD_Status.Ready = 0; */
	info->SD_Status = *(struct SD_STATUS *)&tmp;
	info->MS_Status = *(struct MS_STATUS *)&tmp;
	info->SM_Status = *(struct SM_STATUS *)&tmp;

	return 0;
}

static int ene_ub6250_reset_resume(struct usb_interface *iface)
{
	u8 tmp = 0;
	struct us_data *us = usb_get_intfdata(iface);
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);
	US_DEBUGP("%s\n", __func__);
	/* Report the reset to the SCSI core */
	usb_stor_reset_resume(iface);

	/* FIXME: Notify the subdrivers that they need to reinitialize
	 * the device */
	info->Power_IsResum = true;
	/*info->SD_Status.Ready = 0; */
	info->SD_Status = *(struct SD_STATUS *)&tmp;
	info->MS_Status = *(struct MS_STATUS *)&tmp;
	info->SM_Status = *(struct SM_STATUS *)&tmp;

	return 0;
}

#else

#define ene_ub6250_resume		NULL
#define ene_ub6250_reset_resume		NULL

#endif

static struct usb_driver ene_ub6250_driver = {
	.name =		"ums_eneub6250",
	.probe =	ene_ub6250_probe,
	.disconnect =	usb_stor_disconnect,
	.suspend =	usb_stor_suspend,
	.resume =	ene_ub6250_resume,
	.reset_resume =	ene_ub6250_reset_resume,
	.pre_reset =	usb_stor_pre_reset,
	.post_reset =	usb_stor_post_reset,
	.id_table =	ene_ub6250_usb_ids,
	.soft_unbind =	1,
};

static int __init ene_ub6250_init(void)
{
	return usb_register(&ene_ub6250_driver);
}

static void __exit ene_ub6250_exit(void)
{
	usb_deregister(&ene_ub6250_driver);
}

module_init(ene_ub6250_init);
module_exit(ene_ub6250_exit);