2 * MTD driver for Alauda chips
4 * Copyright (C) 2007 Joern Engel <joern@logfs.org>
6 * Based on drivers/usb/usb-skeleton.c which is:
7 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
8 * and on drivers/usb/storage/alauda.c, which is:
9 * (c) 2005 Daniel Drake <dsd@gentoo.org>
11 * Idea and initial work by Arnd Bergmann <arnd@arndb.de>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/module.h>
18 #include <linux/kref.h>
19 #include <linux/usb.h>
20 #include <linux/mutex.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/nand_ecc.h>
24 /* Control commands */
25 #define ALAUDA_GET_XD_MEDIA_STATUS 0x08
26 #define ALAUDA_ACK_XD_MEDIA_CHANGE 0x0a
27 #define ALAUDA_GET_XD_MEDIA_SIG 0x86
30 #define ALAUDA_BULK_CMD 0x40
33 #define ALAUDA_PORT_XD 0x00
34 #define ALAUDA_PORT_SM 0x01
37 #define ALAUDA_BULK_READ_PAGE 0x84
38 #define ALAUDA_BULK_READ_OOB 0x85 /* don't use, there's a chip bug */
39 #define ALAUDA_BULK_READ_BLOCK 0x94
40 #define ALAUDA_BULK_ERASE_BLOCK 0xa3
41 #define ALAUDA_BULK_WRITE_PAGE 0xa4
42 #define ALAUDA_BULK_WRITE_BLOCK 0xb4
43 #define ALAUDA_BULK_RESET_MEDIA 0xe0
45 /* Address shifting */
46 #define PBA_LO(pba) ((pba & 0xF) << 5)
47 #define PBA_HI(pba) (pba >> 3)
48 #define PBA_ZONE(pba) (pba >> 11)
52 static struct usb_device_id alauda_table [] = {
53 { USB_DEVICE(0x0584, 0x0008) }, /* Fujifilm DPC-R1 */
54 { USB_DEVICE(0x07b4, 0x010a) }, /* Olympus MAUSB-10 */
57 MODULE_DEVICE_TABLE(usb, alauda_table);
61 u8 chipshift; /* 1<<chipshift total size */
62 u8 pageshift; /* 1<<pageshift page size */
63 u8 blockshift; /* 1<<blockshift block size */
67 struct usb_device *dev;
68 struct usb_interface *interface;
70 struct alauda_card *card;
71 struct mutex card_mutex;
75 unsigned int write_out;
77 unsigned int bulk_out;
82 static struct alauda_card alauda_card_ids[] = {
84 { 0x6e, 20, 8, 12}, /* 1 MB */
85 { 0xe8, 20, 8, 12}, /* 1 MB */
86 { 0xec, 20, 8, 12}, /* 1 MB */
87 { 0x64, 21, 8, 12}, /* 2 MB */
88 { 0xea, 21, 8, 12}, /* 2 MB */
89 { 0x6b, 22, 9, 13}, /* 4 MB */
90 { 0xe3, 22, 9, 13}, /* 4 MB */
91 { 0xe5, 22, 9, 13}, /* 4 MB */
92 { 0xe6, 23, 9, 13}, /* 8 MB */
93 { 0x73, 24, 9, 14}, /* 16 MB */
94 { 0x75, 25, 9, 14}, /* 32 MB */
95 { 0x76, 26, 9, 14}, /* 64 MB */
96 { 0x79, 27, 9, 14}, /* 128 MB */
97 { 0x71, 28, 9, 14}, /* 256 MB */
100 { 0x5d, 21, 9, 13}, /* 2 MB */
101 { 0xd5, 22, 9, 13}, /* 4 MB */
102 { 0xd6, 23, 9, 13}, /* 8 MB */
103 { 0x57, 24, 9, 13}, /* 16 MB */
104 { 0x58, 25, 9, 13}, /* 32 MB */
108 static struct alauda_card *get_card(u8 id)
110 struct alauda_card *card;
112 for (card = alauda_card_ids; card->id; card++)
118 static void alauda_delete(struct kref *kref)
120 struct alauda *al = container_of(kref, struct alauda, kref);
123 del_mtd_device(al->mtd);
126 usb_put_dev(al->dev);
130 static int alauda_get_media_status(struct alauda *al, void *buf)
134 mutex_lock(&al->card_mutex);
135 ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
136 ALAUDA_GET_XD_MEDIA_STATUS, 0xc0, 0, 1, buf, 2, HZ);
137 mutex_unlock(&al->card_mutex);
141 static int alauda_ack_media(struct alauda *al)
145 mutex_lock(&al->card_mutex);
146 ret = usb_control_msg(al->dev, usb_sndctrlpipe(al->dev, 0),
147 ALAUDA_ACK_XD_MEDIA_CHANGE, 0x40, 0, 1, NULL, 0, HZ);
148 mutex_unlock(&al->card_mutex);
152 static int alauda_get_media_signatures(struct alauda *al, void *buf)
156 mutex_lock(&al->card_mutex);
157 ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
158 ALAUDA_GET_XD_MEDIA_SIG, 0xc0, 0, 0, buf, 4, HZ);
159 mutex_unlock(&al->card_mutex);
163 static void alauda_reset(struct alauda *al)
166 ALAUDA_BULK_CMD, ALAUDA_BULK_RESET_MEDIA, 0, 0,
169 mutex_lock(&al->card_mutex);
170 usb_bulk_msg(al->dev, al->bulk_out, command, 9, NULL, HZ);
171 mutex_unlock(&al->card_mutex);
174 static void correct_data(void *buf, void *read_ecc,
175 int *corrected, int *uncorrected)
180 nand_calculate_ecc(NULL, buf, calc_ecc);
181 err = nand_correct_data(NULL, buf, read_ecc, calc_ecc);
190 struct alauda_sg_request {
192 struct completion comp;
195 static void alauda_complete(struct urb *urb)
197 struct completion *comp = urb->context;
203 static int __alauda_read_page(struct mtd_info *mtd, loff_t from, void *buf,
206 struct alauda_sg_request sg;
207 struct alauda *al = mtd->priv;
208 u32 pba = from >> al->card->blockshift;
209 u32 page = (from >> al->card->pageshift) & al->pagemask;
211 ALAUDA_BULK_CMD, ALAUDA_BULK_READ_PAGE, PBA_HI(pba),
212 PBA_ZONE(pba), 0, PBA_LO(pba) + page, 1, 0, al->port
220 for (i=0; i<3; i++) {
221 sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
225 init_completion(&sg.comp);
226 usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
227 alauda_complete, NULL);
228 usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, mtd->writesize,
229 alauda_complete, NULL);
230 usb_fill_bulk_urb(sg.urb[2], al->dev, al->bulk_in, oob, 16,
231 alauda_complete, &sg.comp);
233 mutex_lock(&al->card_mutex);
234 for (i=0; i<3; i++) {
235 err = usb_submit_urb(sg.urb[i], GFP_NOIO);
239 if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
242 for (i=0; i<3; i++) {
243 usb_kill_urb(sg.urb[i]);
246 mutex_unlock(&al->card_mutex);
249 usb_free_urb(sg.urb[0]);
250 usb_free_urb(sg.urb[1]);
251 usb_free_urb(sg.urb[2]);
255 static int alauda_read_page(struct mtd_info *mtd, loff_t from,
256 void *buf, u8 *oob, int *corrected, int *uncorrected)
260 err = __alauda_read_page(mtd, from, buf, oob);
263 correct_data(buf, oob+13, corrected, uncorrected);
264 correct_data(buf+256, oob+8, corrected, uncorrected);
268 static int alauda_write_page(struct mtd_info *mtd, loff_t to, void *buf,
271 struct alauda_sg_request sg;
272 struct alauda *al = mtd->priv;
273 u32 pba = to >> al->card->blockshift;
274 u32 page = (to >> al->card->pageshift) & al->pagemask;
276 ALAUDA_BULK_CMD, ALAUDA_BULK_WRITE_PAGE, PBA_HI(pba),
277 PBA_ZONE(pba), 0, PBA_LO(pba) + page, 32, 0, al->port
285 for (i=0; i<3; i++) {
286 sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
290 init_completion(&sg.comp);
291 usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
292 alauda_complete, NULL);
293 usb_fill_bulk_urb(sg.urb[1], al->dev, al->write_out, buf,mtd->writesize,
294 alauda_complete, NULL);
295 usb_fill_bulk_urb(sg.urb[2], al->dev, al->write_out, oob, 16,
296 alauda_complete, &sg.comp);
298 mutex_lock(&al->card_mutex);
299 for (i=0; i<3; i++) {
300 err = usb_submit_urb(sg.urb[i], GFP_NOIO);
304 if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
307 for (i=0; i<3; i++) {
308 usb_kill_urb(sg.urb[i]);
311 mutex_unlock(&al->card_mutex);
314 usb_free_urb(sg.urb[0]);
315 usb_free_urb(sg.urb[1]);
316 usb_free_urb(sg.urb[2]);
320 static int alauda_erase_block(struct mtd_info *mtd, loff_t ofs)
322 struct alauda_sg_request sg;
323 struct alauda *al = mtd->priv;
324 u32 pba = ofs >> al->card->blockshift;
326 ALAUDA_BULK_CMD, ALAUDA_BULK_ERASE_BLOCK, PBA_HI(pba),
327 PBA_ZONE(pba), 0, PBA_LO(pba), 0x02, 0, al->port
336 for (i=0; i<2; i++) {
337 sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
341 init_completion(&sg.comp);
342 usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
343 alauda_complete, NULL);
344 usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, 2,
345 alauda_complete, &sg.comp);
347 mutex_lock(&al->card_mutex);
348 for (i=0; i<2; i++) {
349 err = usb_submit_urb(sg.urb[i], GFP_NOIO);
353 if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
356 for (i=0; i<2; i++) {
357 usb_kill_urb(sg.urb[i]);
360 mutex_unlock(&al->card_mutex);
363 usb_free_urb(sg.urb[0]);
364 usb_free_urb(sg.urb[1]);
368 static int alauda_read_oob(struct mtd_info *mtd, loff_t from, void *oob)
370 static u8 ignore_buf[512]; /* write only */
372 return __alauda_read_page(mtd, from, ignore_buf, oob);
375 static int popcount8(u8 c)
384 static int alauda_isbad(struct mtd_info *mtd, loff_t ofs)
389 err = alauda_read_oob(mtd, ofs, oob);
393 /* A block is marked bad if two or more bits are zero */
394 return popcount8(oob[5]) >= 7 ? 0 : 1;
397 static int alauda_bounce_read(struct mtd_info *mtd, loff_t from, size_t len,
398 size_t *retlen, u_char *buf)
400 struct alauda *al = mtd->priv;
402 int err, corrected=0, uncorrected=0;
404 bounce_buf = kmalloc(mtd->writesize, GFP_KERNEL);
411 size_t byte = from & al->bytemask;
412 size_t cplen = min(len, mtd->writesize - byte);
414 err = alauda_read_page(mtd, from, bounce_buf, oob,
415 &corrected, &uncorrected);
419 memcpy(buf, bounce_buf + byte, cplen);
434 static int alauda_read(struct mtd_info *mtd, loff_t from, size_t len,
435 size_t *retlen, u_char *buf)
437 struct alauda *al = mtd->priv;
438 int err, corrected=0, uncorrected=0;
440 if ((from & al->bytemask) || (len & al->bytemask))
441 return alauda_bounce_read(mtd, from, len, retlen, buf);
447 err = alauda_read_page(mtd, from, buf, oob,
448 &corrected, &uncorrected);
452 buf += mtd->writesize;
453 from += mtd->writesize;
454 len -= mtd->writesize;
464 static int alauda_write(struct mtd_info *mtd, loff_t to, size_t len,
465 size_t *retlen, const u_char *buf)
467 struct alauda *al = mtd->priv;
470 if ((to & al->bytemask) || (len & al->bytemask))
475 u32 page = (to >> al->card->pageshift) & al->pagemask;
476 u8 oob[16] = { 'h', 'e', 'l', 'l', 'o', 0xff, 0xff, 0xff,
477 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
479 /* don't write to bad blocks */
481 err = alauda_isbad(mtd, to);
486 nand_calculate_ecc(mtd, buf, &oob[13]);
487 nand_calculate_ecc(mtd, buf+256, &oob[8]);
489 err = alauda_write_page(mtd, to, (void*)buf, oob);
493 buf += mtd->writesize;
494 to += mtd->writesize;
495 len -= mtd->writesize;
500 static int __alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
502 struct alauda *al = mtd->priv;
503 u32 ofs = instr->addr;
504 u32 len = instr->len;
507 if ((ofs & al->blockmask) || (len & al->blockmask))
511 /* don't erase bad blocks */
512 err = alauda_isbad(mtd, ofs);
518 err = alauda_erase_block(mtd, ofs);
522 ofs += mtd->erasesize;
523 len -= mtd->erasesize;
528 static int alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
532 err = __alauda_erase(mtd, instr);
533 instr->state = err ? MTD_ERASE_FAILED : MTD_ERASE_DONE;
534 mtd_erase_callback(instr);
538 static int alauda_init_media(struct alauda *al)
540 u8 buf[4], *b0=buf, *b1=buf+1;
541 struct alauda_card *card;
542 struct mtd_info *mtd;
545 mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
550 err = alauda_get_media_status(al, buf);
558 err = alauda_ack_media(al);
564 err = alauda_get_media_status(al, buf);
569 /* media not ready */
573 err = alauda_get_media_signatures(al, buf);
577 card = get_card(*b1);
579 printk(KERN_ERR"Alauda: unknown card id %02x\n", *b1);
583 printk(KERN_INFO"pagesize=%x\nerasesize=%x\nsize=%xMiB\n",
584 1<<card->pageshift, 1<<card->blockshift,
585 1<<(card->chipshift-20));
587 al->pagemask = (1 << (card->blockshift - card->pageshift)) - 1;
588 al->bytemask = (1 << card->pageshift) - 1;
589 al->blockmask = (1 << card->blockshift) - 1;
591 mtd->name = "alauda";
592 mtd->size = 1<<card->chipshift;
593 mtd->erasesize = 1<<card->blockshift;
594 mtd->writesize = 1<<card->pageshift;
595 mtd->type = MTD_NANDFLASH;
596 mtd->flags = MTD_CAP_NANDFLASH;
597 mtd->read = alauda_read;
598 mtd->write = alauda_write;
599 mtd->erase = alauda_erase;
600 mtd->block_isbad = alauda_isbad;
602 mtd->owner = THIS_MODULE;
604 err = add_mtd_device(mtd);
611 alauda_reset(al); /* no clue whether this is necessary */
618 static int alauda_check_media(struct alauda *al)
620 u8 buf[2], *b0 = buf, *b1 = buf+1;
623 err = alauda_get_media_status(al, buf);
627 if ((*b1 & 0x01) == 0) {
631 if ((*b0 & 0x80) || ((*b0 & 0x1F) == 0x10)) {
637 return alauda_init_media(al);
642 static int alauda_probe(struct usb_interface *interface,
643 const struct usb_device_id *id)
646 struct usb_host_interface *iface;
647 struct usb_endpoint_descriptor *ep,
648 *ep_in=NULL, *ep_out=NULL, *ep_wr=NULL;
649 int i, err = -ENOMEM;
651 al = kzalloc(2*sizeof(*al), GFP_KERNEL);
655 kref_init(&al->kref);
656 usb_set_intfdata(interface, al);
658 al->dev = usb_get_dev(interface_to_usbdev(interface));
659 al->interface = interface;
661 iface = interface->cur_altsetting;
662 for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
663 ep = &iface->endpoint[i].desc;
665 if (usb_endpoint_is_bulk_in(ep)) {
667 } else if (usb_endpoint_is_bulk_out(ep)) {
675 if (!ep_wr || !ep_in || !ep_out)
678 al->write_out = usb_sndbulkpipe(al->dev,
679 usb_endpoint_num(ep_wr));
680 al->bulk_in = usb_rcvbulkpipe(al->dev,
681 usb_endpoint_num(ep_in));
682 al->bulk_out = usb_sndbulkpipe(al->dev,
683 usb_endpoint_num(ep_out));
685 /* second device is identical up to now */
686 memcpy(al+1, al, sizeof(*al));
688 mutex_init(&al[0].card_mutex);
689 mutex_init(&al[1].card_mutex);
691 al[0].port = ALAUDA_PORT_XD;
692 al[1].port = ALAUDA_PORT_SM;
694 dev_info(&interface->dev, "alauda probed\n");
695 alauda_check_media(al);
696 alauda_check_media(al+1);
702 kref_put(&al->kref, alauda_delete);
706 static void alauda_disconnect(struct usb_interface *interface)
710 al = usb_get_intfdata(interface);
711 usb_set_intfdata(interface, NULL);
713 /* FIXME: prevent more I/O from starting */
715 /* decrement our usage count */
717 kref_put(&al->kref, alauda_delete);
719 dev_info(&interface->dev, "alauda gone");
722 static struct usb_driver alauda_driver = {
724 .probe = alauda_probe,
725 .disconnect = alauda_disconnect,
726 .id_table = alauda_table,
729 static int __init alauda_init(void)
731 return usb_register(&alauda_driver);
734 static void __exit alauda_exit(void)
736 usb_deregister(&alauda_driver);
739 module_init(alauda_init);
740 module_exit(alauda_exit);
742 MODULE_LICENSE("GPL");