summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/nand/alauda.c
blob: 9623803948550a066ea336049c844db8c5f1e7f8 (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
/*
 * MTD driver for Alauda chips
 *
 * Copyright (C) 2007 Joern Engel <joern@logfs.org>
 *
 * Based on drivers/usb/usb-skeleton.c which is:
 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
 * and on drivers/usb/storage/alauda.c, which is:
 *   (c) 2005 Daniel Drake <dsd@gentoo.org>
 *
 * Idea and initial work by Arnd Bergmann <arnd@arndb.de>
 */
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kref.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand_ecc.h>

/* Control commands */
#define ALAUDA_GET_XD_MEDIA_STATUS	0x08
#define ALAUDA_ACK_XD_MEDIA_CHANGE	0x0a
#define ALAUDA_GET_XD_MEDIA_SIG		0x86

/* Common prefix */
#define ALAUDA_BULK_CMD			0x40

/* The two ports */
#define ALAUDA_PORT_XD			0x00
#define ALAUDA_PORT_SM			0x01

/* Bulk commands */
#define ALAUDA_BULK_READ_PAGE		0x84
#define ALAUDA_BULK_READ_OOB		0x85 /* don't use, there's a chip bug */
#define ALAUDA_BULK_READ_BLOCK		0x94
#define ALAUDA_BULK_ERASE_BLOCK		0xa3
#define ALAUDA_BULK_WRITE_PAGE		0xa4
#define ALAUDA_BULK_WRITE_BLOCK		0xb4
#define ALAUDA_BULK_RESET_MEDIA		0xe0

/* Address shifting */
#define PBA_LO(pba) ((pba & 0xF) << 5)
#define PBA_HI(pba) (pba >> 3)
#define PBA_ZONE(pba) (pba >> 11)

#define TIMEOUT HZ

static struct usb_device_id alauda_table [] = {
	{ USB_DEVICE(0x0584, 0x0008) },	/* Fujifilm DPC-R1 */
	{ USB_DEVICE(0x07b4, 0x010a) },	/* Olympus MAUSB-10 */
	{ }
};
MODULE_DEVICE_TABLE(usb, alauda_table);

struct alauda_card {
	u8	id;		/* id byte */
	u8	chipshift;	/* 1<<chipshift total size */
	u8	pageshift;	/* 1<<pageshift page size */
	u8	blockshift;	/* 1<<blockshift block size */
};

struct alauda {
	struct usb_device	*dev;
	struct usb_interface	*interface;
	struct mtd_info		*mtd;
	struct alauda_card	*card;
	struct mutex		card_mutex;
	u32			pagemask;
	u32			bytemask;
	u32			blockmask;
	unsigned int		write_out;
	unsigned int		bulk_in;
	unsigned int		bulk_out;
	u8			port;
	struct kref		kref;
};

static struct alauda_card alauda_card_ids[] = {
	/* NAND flash */
	{ 0x6e, 20, 8, 12},	/* 1 MB */
	{ 0xe8, 20, 8, 12},	/* 1 MB */
	{ 0xec, 20, 8, 12},	/* 1 MB */
	{ 0x64, 21, 8, 12},	/* 2 MB */
	{ 0xea, 21, 8, 12},	/* 2 MB */
	{ 0x6b, 22, 9, 13},	/* 4 MB */
	{ 0xe3, 22, 9, 13},	/* 4 MB */
	{ 0xe5, 22, 9, 13},	/* 4 MB */
	{ 0xe6, 23, 9, 13},	/* 8 MB */
	{ 0x73, 24, 9, 14},	/* 16 MB */
	{ 0x75, 25, 9, 14},	/* 32 MB */
	{ 0x76, 26, 9, 14},	/* 64 MB */
	{ 0x79, 27, 9, 14},	/* 128 MB */
	{ 0x71, 28, 9, 14},	/* 256 MB */

	/* MASK ROM */
	{ 0x5d, 21, 9, 13},	/* 2 MB */
	{ 0xd5, 22, 9, 13},	/* 4 MB */
	{ 0xd6, 23, 9, 13},	/* 8 MB */
	{ 0x57, 24, 9, 13},	/* 16 MB */
	{ 0x58, 25, 9, 13},	/* 32 MB */
	{ }
};

static struct alauda_card *get_card(u8 id)
{
	struct alauda_card *card;

	for (card = alauda_card_ids; card->id; card++)
		if (card->id == id)
			return card;
	return NULL;
}

static void alauda_delete(struct kref *kref)
{
	struct alauda *al = container_of(kref, struct alauda, kref);

	if (al->mtd) {
		del_mtd_device(al->mtd);
		kfree(al->mtd);
	}
	usb_put_dev(al->dev);
	kfree(al);
}

static int alauda_get_media_status(struct alauda *al, void *buf)
{
	int ret;

	mutex_lock(&al->card_mutex);
	ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
			ALAUDA_GET_XD_MEDIA_STATUS, 0xc0, 0, 1, buf, 2, HZ);
	mutex_unlock(&al->card_mutex);
	return ret;
}

static int alauda_ack_media(struct alauda *al)
{
	int ret;

	mutex_lock(&al->card_mutex);
	ret = usb_control_msg(al->dev, usb_sndctrlpipe(al->dev, 0),
			ALAUDA_ACK_XD_MEDIA_CHANGE, 0x40, 0, 1, NULL, 0, HZ);
	mutex_unlock(&al->card_mutex);
	return ret;
}

static int alauda_get_media_signatures(struct alauda *al, void *buf)
{
	int ret;

	mutex_lock(&al->card_mutex);
	ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
			ALAUDA_GET_XD_MEDIA_SIG, 0xc0, 0, 0, buf, 4, HZ);
	mutex_unlock(&al->card_mutex);
	return ret;
}

static void alauda_reset(struct alauda *al)
{
	u8 command[] = {
		ALAUDA_BULK_CMD, ALAUDA_BULK_RESET_MEDIA, 0, 0,
		0, 0, 0, 0, al->port
	};
	mutex_lock(&al->card_mutex);
	usb_bulk_msg(al->dev, al->bulk_out, command, 9, NULL, HZ);
	mutex_unlock(&al->card_mutex);
}

static void correct_data(void *buf, void *read_ecc,
		int *corrected, int *uncorrected)
{
	u8 calc_ecc[3];
	int err;

	nand_calculate_ecc(NULL, buf, calc_ecc);
	err = nand_correct_data(NULL, buf, read_ecc, calc_ecc);
	if (err) {
		if (err > 0)
			(*corrected)++;
		else
			(*uncorrected)++;
	}
}

struct alauda_sg_request {
	struct urb *urb[3];
	struct completion comp;
};

static void alauda_complete(struct urb *urb)
{
	struct completion *comp = urb->context;

	if (comp)
		complete(comp);
}

static int __alauda_read_page(struct mtd_info *mtd, loff_t from, void *buf,
		void *oob)
{
	struct alauda_sg_request sg;
	struct alauda *al = mtd->priv;
	u32 pba = from >> al->card->blockshift;
	u32 page = (from >> al->card->pageshift) & al->pagemask;
	u8 command[] = {
		ALAUDA_BULK_CMD, ALAUDA_BULK_READ_PAGE, PBA_HI(pba),
		PBA_ZONE(pba), 0, PBA_LO(pba) + page, 1, 0, al->port
	};
	int i, err;

	for (i=0; i<3; i++)
		sg.urb[i] = NULL;

	err = -ENOMEM;
	for (i=0; i<3; i++) {
		sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
		if (!sg.urb[i])
			goto out;
	}
	init_completion(&sg.comp);
	usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
			alauda_complete, NULL);
	usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, mtd->writesize,
			alauda_complete, NULL);
	usb_fill_bulk_urb(sg.urb[2], al->dev, al->bulk_in, oob, 16,
			alauda_complete, &sg.comp);

	mutex_lock(&al->card_mutex);
	for (i=0; i<3; i++) {
		err = usb_submit_urb(sg.urb[i], GFP_NOIO);
		if (err)
			goto cancel;
	}
	if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
		err = -ETIMEDOUT;
cancel:
		for (i=0; i<3; i++) {
			usb_kill_urb(sg.urb[i]);
		}
	}
	mutex_unlock(&al->card_mutex);

out:
	usb_free_urb(sg.urb[0]);
	usb_free_urb(sg.urb[1]);
	usb_free_urb(sg.urb[2]);
	return err;
}

static int alauda_read_page(struct mtd_info *mtd, loff_t from,
		void *buf, u8 *oob, int *corrected, int *uncorrected)
{
	int err;

	err = __alauda_read_page(mtd, from, buf, oob);
	if (err)
		return err;
	correct_data(buf, oob+13, corrected, uncorrected);
	correct_data(buf+256, oob+8, corrected, uncorrected);
	return 0;
}

static int alauda_write_page(struct mtd_info *mtd, loff_t to, void *buf,
		void *oob)
{
	struct alauda_sg_request sg;
	struct alauda *al = mtd->priv;
	u32 pba = to >> al->card->blockshift;
	u32 page = (to >> al->card->pageshift) & al->pagemask;
	u8 command[] = {
		ALAUDA_BULK_CMD, ALAUDA_BULK_WRITE_PAGE, PBA_HI(pba),
		PBA_ZONE(pba), 0, PBA_LO(pba) + page, 32, 0, al->port
	};
	int i, err;

	for (i=0; i<3; i++)
		sg.urb[i] = NULL;

	err = -ENOMEM;
	for (i=0; i<3; i++) {
		sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
		if (!sg.urb[i])
			goto out;
	}
	init_completion(&sg.comp);
	usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
			alauda_complete, NULL);
	usb_fill_bulk_urb(sg.urb[1], al->dev, al->write_out, buf,mtd->writesize,
			alauda_complete, NULL);
	usb_fill_bulk_urb(sg.urb[2], al->dev, al->write_out, oob, 16,
			alauda_complete, &sg.comp);

	mutex_lock(&al->card_mutex);
	for (i=0; i<3; i++) {
		err = usb_submit_urb(sg.urb[i], GFP_NOIO);
		if (err)
			goto cancel;
	}
	if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
		err = -ETIMEDOUT;
cancel:
		for (i=0; i<3; i++) {
			usb_kill_urb(sg.urb[i]);
		}
	}
	mutex_unlock(&al->card_mutex);

out:
	usb_free_urb(sg.urb[0]);
	usb_free_urb(sg.urb[1]);
	usb_free_urb(sg.urb[2]);
	return err;
}

static int alauda_erase_block(struct mtd_info *mtd, loff_t ofs)
{
	struct alauda_sg_request sg;
	struct alauda *al = mtd->priv;
	u32 pba = ofs >> al->card->blockshift;
	u8 command[] = {
		ALAUDA_BULK_CMD, ALAUDA_BULK_ERASE_BLOCK, PBA_HI(pba),
		PBA_ZONE(pba), 0, PBA_LO(pba), 0x02, 0, al->port
	};
	u8 buf[2];
	int i, err;

	for (i=0; i<2; i++)
		sg.urb[i] = NULL;

	err = -ENOMEM;
	for (i=0; i<2; i++) {
		sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
		if (!sg.urb[i])
			goto out;
	}
	init_completion(&sg.comp);
	usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
			alauda_complete, NULL);
	usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, 2,
			alauda_complete, &sg.comp);

	mutex_lock(&al->card_mutex);
	for (i=0; i<2; i++) {
		err = usb_submit_urb(sg.urb[i], GFP_NOIO);
		if (err)
			goto cancel;
	}
	if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
		err = -ETIMEDOUT;
cancel:
		for (i=0; i<2; i++) {
			usb_kill_urb(sg.urb[i]);
		}
	}
	mutex_unlock(&al->card_mutex);

out:
	usb_free_urb(sg.urb[0]);
	usb_free_urb(sg.urb[1]);
	return err;
}

static int alauda_read_oob(struct mtd_info *mtd, loff_t from, void *oob)
{
	static u8 ignore_buf[512]; /* write only */

	return __alauda_read_page(mtd, from, ignore_buf, oob);
}

static int popcount8(u8 c)
{
	int ret = 0;

	for ( ; c; c>>=1)
		ret += c & 1;
	return ret;
}

static int alauda_isbad(struct mtd_info *mtd, loff_t ofs)
{
	u8 oob[16];
	int err;

	err = alauda_read_oob(mtd, ofs, oob);
	if (err)
		return err;

	/* A block is marked bad if two or more bits are zero */
	return popcount8(oob[5]) >= 7 ? 0 : 1;
}

static int alauda_bounce_read(struct mtd_info *mtd, loff_t from, size_t len,
		size_t *retlen, u_char *buf)
{
	struct alauda *al = mtd->priv;
	void *bounce_buf;
	int err, corrected=0, uncorrected=0;

	bounce_buf = kmalloc(mtd->writesize, GFP_KERNEL);
	if (!bounce_buf)
		return -ENOMEM;

	*retlen = len;
	while (len) {
		u8 oob[16];
		size_t byte = from & al->bytemask;
		size_t cplen = min(len, mtd->writesize - byte);

		err = alauda_read_page(mtd, from, bounce_buf, oob,
				&corrected, &uncorrected);
		if (err)
			goto out;

		memcpy(buf, bounce_buf + byte, cplen);
		buf += cplen;
		from += cplen;
		len -= cplen;
	}
	err = 0;
	if (corrected)
		err = -EUCLEAN;
	if (uncorrected)
		err = -EBADMSG;
out:
	kfree(bounce_buf);
	return err;
}

static int alauda_read(struct mtd_info *mtd, loff_t from, size_t len,
		size_t *retlen, u_char *buf)
{
	struct alauda *al = mtd->priv;
	int err, corrected=0, uncorrected=0;

	if ((from & al->bytemask) || (len & al->bytemask))
		return alauda_bounce_read(mtd, from, len, retlen, buf);

	*retlen = len;
	while (len) {
		u8 oob[16];

		err = alauda_read_page(mtd, from, buf, oob,
				&corrected, &uncorrected);
		if (err)
			return err;

		buf += mtd->writesize;
		from += mtd->writesize;
		len -= mtd->writesize;
	}
	err = 0;
	if (corrected)
		err = -EUCLEAN;
	if (uncorrected)
		err = -EBADMSG;
	return err;
}

static int alauda_write(struct mtd_info *mtd, loff_t to, size_t len,
		size_t *retlen, const u_char *buf)
{
	struct alauda *al = mtd->priv;
	int err;

	if ((to & al->bytemask) || (len & al->bytemask))
		return -EINVAL;

	*retlen = len;
	while (len) {
		u32 page = (to >> al->card->pageshift) & al->pagemask;
		u8 oob[16] = {	'h', 'e', 'l', 'l', 'o', 0xff, 0xff, 0xff,
				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

		/* don't write to bad blocks */
		if (page == 0) {
			err = alauda_isbad(mtd, to);
			if (err) {
				return -EIO;
			}
		}
		nand_calculate_ecc(mtd, buf, &oob[13]);
		nand_calculate_ecc(mtd, buf+256, &oob[8]);

		err = alauda_write_page(mtd, to, (void*)buf, oob);
		if (err)
			return err;

		buf += mtd->writesize;
		to += mtd->writesize;
		len -= mtd->writesize;
	}
	return 0;
}

static int __alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
{
	struct alauda *al = mtd->priv;
	u32 ofs = instr->addr;
	u32 len = instr->len;
	int err;

	if ((ofs & al->blockmask) || (len & al->blockmask))
		return -EINVAL;

	while (len) {
		/* don't erase bad blocks */
		err = alauda_isbad(mtd, ofs);
		if (err > 0)
			err = -EIO;
		if (err < 0)
			return err;

		err = alauda_erase_block(mtd, ofs);
		if (err < 0)
			return err;

		ofs += mtd->erasesize;
		len -= mtd->erasesize;
	}
	return 0;
}

static int alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
{
	int err;

	err = __alauda_erase(mtd, instr);
	instr->state = err ? MTD_ERASE_FAILED : MTD_ERASE_DONE;
	mtd_erase_callback(instr);
	return err;
}

static int alauda_init_media(struct alauda *al)
{
	u8 buf[4], *b0=buf, *b1=buf+1;
	struct alauda_card *card;
	struct mtd_info *mtd;
	int err;

	mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
	if (!mtd)
		return -ENOMEM;

	for (;;) {
		err = alauda_get_media_status(al, buf);
		if (err < 0)
			goto error;
		if (*b0 & 0x10)
			break;
		msleep(20);
	}

	err = alauda_ack_media(al);
	if (err)
		goto error;

	msleep(10);

	err = alauda_get_media_status(al, buf);
	if (err < 0)
		goto error;

	if (*b0 != 0x14) {
		/* media not ready */
		err = -EIO;
		goto error;
	}
	err = alauda_get_media_signatures(al, buf);
	if (err < 0)
		goto error;

	card = get_card(*b1);
	if (!card) {
		printk(KERN_ERR"Alauda: unknown card id %02x\n", *b1);
		err = -EIO;
		goto error;
	}
	printk(KERN_INFO"pagesize=%x\nerasesize=%x\nsize=%xMiB\n",
			1<<card->pageshift, 1<<card->blockshift,
			1<<(card->chipshift-20));
	al->card = card;
	al->pagemask = (1 << (card->blockshift - card->pageshift)) - 1;
	al->bytemask = (1 << card->pageshift) - 1;
	al->blockmask = (1 << card->blockshift) - 1;

	mtd->name = "alauda";
	mtd->size = 1<<card->chipshift;
	mtd->erasesize = 1<<card->blockshift;
	mtd->writesize = 1<<card->pageshift;
	mtd->type = MTD_NANDFLASH;
	mtd->flags = MTD_CAP_NANDFLASH;
	mtd->read = alauda_read;
	mtd->write = alauda_write;
	mtd->erase = alauda_erase;
	mtd->block_isbad = alauda_isbad;
	mtd->priv = al;
	mtd->owner = THIS_MODULE;

	err = add_mtd_device(mtd);
	if (err) {
		err = -ENFILE;
		goto error;
	}

	al->mtd = mtd;
	alauda_reset(al); /* no clue whether this is necessary */
	return 0;
error:
	kfree(mtd);
	return err;
}

static int alauda_check_media(struct alauda *al)
{
	u8 buf[2], *b0 = buf, *b1 = buf+1;
	int err;

	err = alauda_get_media_status(al, buf);
	if (err < 0)
		return err;

	if ((*b1 & 0x01) == 0) {
		/* door open */
		return -EIO;
	}
	if ((*b0 & 0x80) || ((*b0 & 0x1F) == 0x10)) {
		/* no media ? */
		return -EIO;
	}
	if (*b0 & 0x08) {
		/* media change ? */
		return alauda_init_media(al);
	}
	return 0;
}

static int alauda_probe(struct usb_interface *interface,
		const struct usb_device_id *id)
{
	struct alauda *al;
	struct usb_host_interface *iface;
	struct usb_endpoint_descriptor *ep,
			*ep_in=NULL, *ep_out=NULL, *ep_wr=NULL;
	int i, err = -ENOMEM;

	al = kzalloc(2*sizeof(*al), GFP_KERNEL);
	if (!al)
		goto error;

	kref_init(&al->kref);
	usb_set_intfdata(interface, al);

	al->dev = usb_get_dev(interface_to_usbdev(interface));
	al->interface = interface;

	iface = interface->cur_altsetting;
	for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
		ep = &iface->endpoint[i].desc;

		if (usb_endpoint_is_bulk_in(ep)) {
			ep_in = ep;
		} else if (usb_endpoint_is_bulk_out(ep)) {
			if (i==0)
				ep_wr = ep;
			else
				ep_out = ep;
		}
	}
	err = -EIO;
	if (!ep_wr || !ep_in || !ep_out)
		goto error;

	al->write_out = usb_sndbulkpipe(al->dev,
			ep_wr->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	al->bulk_in = usb_rcvbulkpipe(al->dev,
			ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	al->bulk_out = usb_sndbulkpipe(al->dev,
			ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);

	/* second device is identical up to now */
	memcpy(al+1, al, sizeof(*al));

	mutex_init(&al[0].card_mutex);
	mutex_init(&al[1].card_mutex);

	al[0].port = ALAUDA_PORT_XD;
	al[1].port = ALAUDA_PORT_SM;

	dev_info(&interface->dev, "alauda probed\n");
	alauda_check_media(al);
	alauda_check_media(al+1);

	return 0;

error:
	if (al)
		kref_put(&al->kref, alauda_delete);
	return err;
}

static void alauda_disconnect(struct usb_interface *interface)
{
	struct alauda *al;

	al = usb_get_intfdata(interface);
	usb_set_intfdata(interface, NULL);

	/* FIXME: prevent more I/O from starting */

	/* decrement our usage count */
	if (al)
		kref_put(&al->kref, alauda_delete);

	dev_info(&interface->dev, "alauda gone");
}

static struct usb_driver alauda_driver = {
	.name =		"alauda",
	.probe =	alauda_probe,
	.disconnect =	alauda_disconnect,
	.id_table =	alauda_table,
};

static int __init alauda_init(void)
{
	return usb_register(&alauda_driver);
}

static void __exit alauda_exit(void)
{
	usb_deregister(&alauda_driver);
}

module_init(alauda_init);
module_exit(alauda_exit);

MODULE_LICENSE("GPL");