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usb-storage: make onetouch a separate module
[deliverable/linux.git] / drivers / usb / storage / sddr55.c
CommitLineData
1da177e4 1/* Driver for SanDisk SDDR-55 SmartMedia reader
1da177e4
LT		 2 *
3 * SDDR55 driver v0.1:
4 *
5 * First release
6 *
7 * Current development and maintenance by:
8 * (c) 2002 Simon Munton
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2, or (at your option) any
13 * later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25#include <linux/jiffies.h>
26#include <linux/errno.h>
70fcc005 27#include <linux/module.h>
1da177e4
LT		 28#include <linux/slab.h>
29
30#include <scsi/scsi.h>
31#include <scsi/scsi_cmnd.h>
32
33#include "usb.h"
34#include "transport.h"
35#include "protocol.h"
36#include "debug.h"
70fcc005
AS		 37
38
39/*
40 * The table of devices
41 */
42#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
43 vendorName, productName, useProtocol, useTransport, \
44 initFunction, flags) \
45{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
46 .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
47
48struct usb_device_id sddr55_usb_ids[] = {
49# include "unusual_sddr55.h"
50 { } /* Terminating entry */
51};
52MODULE_DEVICE_TABLE(usb, sddr55_usb_ids);
53
54#undef UNUSUAL_DEV
55
56/*
57 * The flags table
58 */
59#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
60 vendor_name, product_name, use_protocol, use_transport, \
61 init_function, Flags) \
62{ \
63 .vendorName = vendor_name, \
64 .productName = product_name, \
65 .useProtocol = use_protocol, \
66 .useTransport = use_transport, \
67 .initFunction = init_function, \
68}
69
70static struct us_unusual_dev sddr55_unusual_dev_list[] = {
71# include "unusual_sddr55.h"
72 { } /* Terminating entry */
73};
74
75#undef UNUSUAL_DEV
1da177e4
LT		 76
77
78#define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
79#define LSB_of(s) ((s)&0xFF)
80#define MSB_of(s) ((s)>>8)
81#define PAGESIZE 512
82
83#define set_sense_info(sk, asc, ascq) \
84 do { \
85 info->sense_data[2] = sk; \
86 info->sense_data[12] = asc; \
87 info->sense_data[13] = ascq; \
88 } while (0)
89
90
91struct sddr55_card_info {
92 unsigned long capacity; /* Size of card in bytes */
93 int max_log_blks; /* maximum number of logical blocks */
94 int pageshift; /* log2 of pagesize */
95 int smallpageshift; /* 1 if pagesize == 256 */
96 int blocksize; /* Size of block in pages */
97 int blockshift; /* log2 of blocksize */
98 int blockmask; /* 2^blockshift - 1 */
99 int read_only; /* non zero if card is write protected */
100 int force_read_only; /* non zero if we find a map error*/
101 int *lba_to_pba; /* logical to physical map */
102 int *pba_to_lba; /* physical to logical map */
103 int fatal_error; /* set if we detect something nasty */
104 unsigned long last_access; /* number of jiffies since we last talked to device */
105 unsigned char sense_data[18];
106};
107
108
109#define NOT_ALLOCATED 0xffffffff
110#define BAD_BLOCK 0xffff
111#define CIS_BLOCK 0x400
112#define UNUSED_BLOCK 0x3ff
113
114static int
115sddr55_bulk_transport(struct us_data *us, int direction,
116 unsigned char *data, unsigned int len) {
117 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
118 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
119 us->recv_bulk_pipe : us->send_bulk_pipe;
120
121 if (!len)
122 return USB_STOR_XFER_GOOD;
123 info->last_access = jiffies;
124 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
125}
126
127/* check if card inserted, if there is, update read_only status
128 * return non zero if no card
129 */
130
131static int sddr55_status(struct us_data *us)
132{
133 int result;
134 unsigned char *command = us->iobuf;
135 unsigned char *status = us->iobuf;
136 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
137
138 /* send command */
139 memset(command, 0, 8);
140 command[5] = 0xB0;
141 command[7] = 0x80;
142 result = sddr55_bulk_transport(us,
143 DMA_TO_DEVICE, command, 8);
144
145 US_DEBUGP("Result for send_command in status %d\n",
146 result);
147
148 if (result != USB_STOR_XFER_GOOD) {
149 set_sense_info (4, 0, 0); /* hardware error */
150 return USB_STOR_TRANSPORT_ERROR;
151 }
152
153 result = sddr55_bulk_transport(us,
154 DMA_FROM_DEVICE, status, 4);
155
156 /* expect to get short transfer if no card fitted */
157 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
158 /* had a short transfer, no card inserted, free map memory */
1bc3c9e1
JJ		 159 kfree(info->lba_to_pba);
160 kfree(info->pba_to_lba);
1da177e4
LT		 161 info->lba_to_pba = NULL;
162 info->pba_to_lba = NULL;
163
164 info->fatal_error = 0;
165 info->force_read_only = 0;
166
167 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */
168 return USB_STOR_TRANSPORT_FAILED;
169 }
170
171 if (result != USB_STOR_XFER_GOOD) {
172 set_sense_info (4, 0, 0); /* hardware error */
173 return USB_STOR_TRANSPORT_FAILED;
174 }
175
176 /* check write protect status */
177 info->read_only = (status[0] & 0x20);
178
179 /* now read status */
180 result = sddr55_bulk_transport(us,
181 DMA_FROM_DEVICE, status, 2);
182
183 if (result != USB_STOR_XFER_GOOD) {
184 set_sense_info (4, 0, 0); /* hardware error */
185 }
186
187 return (result == USB_STOR_XFER_GOOD ?
188 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
189}
190
191
192static int sddr55_read_data(struct us_data *us,
193 unsigned int lba,
194 unsigned int page,
195 unsigned short sectors) {
196
197 int result = USB_STOR_TRANSPORT_GOOD;
198 unsigned char *command = us->iobuf;
199 unsigned char *status = us->iobuf;
200 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
201 unsigned char *buffer;
202
203 unsigned int pba;
204 unsigned long address;
205
206 unsigned short pages;
1f6f31a0
JA		 207 unsigned int len, offset;
208 struct scatterlist *sg;
1da177e4
LT		 209
210 // Since we only read in one block at a time, we have to create
211 // a bounce buffer and move the data a piece at a time between the
212 // bounce buffer and the actual transfer buffer.
213
214 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
215 info->smallpageshift) * PAGESIZE;
216 buffer = kmalloc(len, GFP_NOIO);
217 if (buffer == NULL)
218 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
1f6f31a0
JA		 219 offset = 0;
220 sg = NULL;
1da177e4
LT		 221
222 while (sectors>0) {
223
224 /* have we got to end? */
225 if (lba >= info->max_log_blks)
226 break;
227
228 pba = info->lba_to_pba[lba];
229
230 // Read as many sectors as possible in this block
231
232 pages = min((unsigned int) sectors << info->smallpageshift,
233 info->blocksize - page);
234 len = pages << info->pageshift;
235
236 US_DEBUGP("Read %02X pages, from PBA %04X"
237 " (LBA %04X) page %02X\n",
238 pages, pba, lba, page);
239
240 if (pba == NOT_ALLOCATED) {
241 /* no pba for this lba, fill with zeroes */
242 memset (buffer, 0, len);
243 } else {
244
245 address = (pba << info->blockshift) + page;
246
247 command[0] = 0;
248 command[1] = LSB_of(address>>16);
249 command[2] = LSB_of(address>>8);
250 command[3] = LSB_of(address);
251
252 command[4] = 0;
253 command[5] = 0xB0;
254 command[6] = LSB_of(pages << (1 - info->smallpageshift));
255 command[7] = 0x85;
256
257 /* send command */
258 result = sddr55_bulk_transport(us,
259 DMA_TO_DEVICE, command, 8);
260
261 US_DEBUGP("Result for send_command in read_data %d\n",
262 result);
263
264 if (result != USB_STOR_XFER_GOOD) {
265 result = USB_STOR_TRANSPORT_ERROR;
266 goto leave;
267 }
268
269 /* read data */
270 result = sddr55_bulk_transport(us,
271 DMA_FROM_DEVICE, buffer, len);
272
273 if (result != USB_STOR_XFER_GOOD) {
274 result = USB_STOR_TRANSPORT_ERROR;
275 goto leave;
276 }
277
278 /* now read status */
279 result = sddr55_bulk_transport(us,
280 DMA_FROM_DEVICE, status, 2);
281
282 if (result != USB_STOR_XFER_GOOD) {
283 result = USB_STOR_TRANSPORT_ERROR;
284 goto leave;
285 }
286
287 /* check status for error */
288 if (status[0] == 0xff && status[1] == 0x4) {
289 set_sense_info (3, 0x11, 0);
290 result = USB_STOR_TRANSPORT_FAILED;
291 goto leave;
292 }
293 }
294
295 // Store the data in the transfer buffer
296 usb_stor_access_xfer_buf(buffer, len, us->srb,
1f6f31a0 297 &sg, &offset, TO_XFER_BUF);
1da177e4
LT		 298
299 page = 0;
300 lba++;
301 sectors -= pages >> info->smallpageshift;
302 }
303
304 result = USB_STOR_TRANSPORT_GOOD;
305
306leave:
307 kfree(buffer);
308
309 return result;
310}
311
312static int sddr55_write_data(struct us_data *us,
313 unsigned int lba,
314 unsigned int page,
315 unsigned short sectors) {
316
317 int result = USB_STOR_TRANSPORT_GOOD;
318 unsigned char *command = us->iobuf;
319 unsigned char *status = us->iobuf;
320 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
321 unsigned char *buffer;
322
323 unsigned int pba;
324 unsigned int new_pba;
325 unsigned long address;
326
327 unsigned short pages;
328 int i;
1f6f31a0
JA		 329 unsigned int len, offset;
330 struct scatterlist *sg;
1da177e4
LT		 331
332 /* check if we are allowed to write */
333 if (info->read_only || info->force_read_only) {
334 set_sense_info (7, 0x27, 0); /* read only */
335 return USB_STOR_TRANSPORT_FAILED;
336 }
337
338 // Since we only write one block at a time, we have to create
339 // a bounce buffer and move the data a piece at a time between the
340 // bounce buffer and the actual transfer buffer.
341
342 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
343 info->smallpageshift) * PAGESIZE;
344 buffer = kmalloc(len, GFP_NOIO);
345 if (buffer == NULL)
346 return USB_STOR_TRANSPORT_ERROR;
1f6f31a0
JA		 347 offset = 0;
348 sg = NULL;
1da177e4
LT		 349
350 while (sectors > 0) {
351
352 /* have we got to end? */
353 if (lba >= info->max_log_blks)
354 break;
355
356 pba = info->lba_to_pba[lba];
357
358 // Write as many sectors as possible in this block
359
360 pages = min((unsigned int) sectors << info->smallpageshift,
361 info->blocksize - page);
362 len = pages << info->pageshift;
363
364 // Get the data from the transfer buffer
365 usb_stor_access_xfer_buf(buffer, len, us->srb,
1f6f31a0 366 &sg, &offset, FROM_XFER_BUF);
1da177e4
LT		 367
368 US_DEBUGP("Write %02X pages, to PBA %04X"
369 " (LBA %04X) page %02X\n",
370 pages, pba, lba, page);
371
372 command[4] = 0;
373
374 if (pba == NOT_ALLOCATED) {
375 /* no pba allocated for this lba, find a free pba to use */
376
377 int max_pba = (info->max_log_blks / 250 ) * 256;
378 int found_count = 0;
379 int found_pba = -1;
380
381 /* set pba to first block in zone lba is in */
382 pba = (lba / 1000) * 1024;
383
384 US_DEBUGP("No PBA for LBA %04X\n",lba);
385
386 if (max_pba > 1024)
387 max_pba = 1024;
388
389 /*
390 * Scan through the map looking for an unused block
391 * leave 16 unused blocks at start (or as many as
392 * possible) since the sddr55 seems to reuse a used
393 * block when it shouldn't if we don't leave space.
394 */
395 for (i = 0; i < max_pba; i++, pba++) {
396 if (info->pba_to_lba[pba] == UNUSED_BLOCK) {
397 found_pba = pba;
398 if (found_count++ > 16)
399 break;
400 }
401 }
402
403 pba = found_pba;
404
405 if (pba == -1) {
406 /* oh dear */
407 US_DEBUGP("Couldn't find unallocated block\n");
408
409 set_sense_info (3, 0x31, 0); /* medium error */
410 result = USB_STOR_TRANSPORT_FAILED;
411 goto leave;
412 }
413
414 US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba);
415
416 /* set writing to unallocated block flag */
417 command[4] = 0x40;
418 }
419
420 address = (pba << info->blockshift) + page;
421
422 command[1] = LSB_of(address>>16);
423 command[2] = LSB_of(address>>8);
424 command[3] = LSB_of(address);
425
426 /* set the lba into the command, modulo 1000 */
427 command[0] = LSB_of(lba % 1000);
428 command[6] = MSB_of(lba % 1000);
429
430 command[4] |= LSB_of(pages >> info->smallpageshift);
431 command[5] = 0xB0;
432 command[7] = 0x86;
433
434 /* send command */
435 result = sddr55_bulk_transport(us,
436 DMA_TO_DEVICE, command, 8);
437
438 if (result != USB_STOR_XFER_GOOD) {
439 US_DEBUGP("Result for send_command in write_data %d\n",
440 result);
441
442 /* set_sense_info is superfluous here? */
443 set_sense_info (3, 0x3, 0);/* peripheral write error */
444 result = USB_STOR_TRANSPORT_FAILED;
445 goto leave;
446 }
447
448 /* send the data */
449 result = sddr55_bulk_transport(us,
450 DMA_TO_DEVICE, buffer, len);
451
452 if (result != USB_STOR_XFER_GOOD) {
453 US_DEBUGP("Result for send_data in write_data %d\n",
454 result);
455
456 /* set_sense_info is superfluous here? */
457 set_sense_info (3, 0x3, 0);/* peripheral write error */
458 result = USB_STOR_TRANSPORT_FAILED;
459 goto leave;
460 }
461
462 /* now read status */
463 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
464
465 if (result != USB_STOR_XFER_GOOD) {
466 US_DEBUGP("Result for get_status in write_data %d\n",
467 result);
468
469 /* set_sense_info is superfluous here? */
470 set_sense_info (3, 0x3, 0);/* peripheral write error */
471 result = USB_STOR_TRANSPORT_FAILED;
472 goto leave;
473 }
474
475 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
476 >> info->blockshift;
477
478 /* check status for error */
479 if (status[0] == 0xff && status[1] == 0x4) {
480 info->pba_to_lba[new_pba] = BAD_BLOCK;
481
482 set_sense_info (3, 0x0c, 0);
483 result = USB_STOR_TRANSPORT_FAILED;
484 goto leave;
485 }
486
487 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
488 lba, pba, new_pba);
489
490 /* update the lba<->pba maps, note new_pba might be the same as pba */
491 info->lba_to_pba[lba] = new_pba;
492 info->pba_to_lba[pba] = UNUSED_BLOCK;
493
494 /* check that new_pba wasn't already being used */
495 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
496 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
497 new_pba, info->pba_to_lba[new_pba]);
498 info->fatal_error = 1;
499 set_sense_info (3, 0x31, 0);
500 result = USB_STOR_TRANSPORT_FAILED;
501 goto leave;
502 }
503
504 /* update the pba<->lba maps for new_pba */
505 info->pba_to_lba[new_pba] = lba % 1000;
506
507 page = 0;
508 lba++;
509 sectors -= pages >> info->smallpageshift;
510 }
511 result = USB_STOR_TRANSPORT_GOOD;
512
513 leave:
514 kfree(buffer);
515 return result;
516}
517
518static int sddr55_read_deviceID(struct us_data *us,
519 unsigned char *manufacturerID,
520 unsigned char *deviceID) {
521
522 int result;
523 unsigned char *command = us->iobuf;
524 unsigned char *content = us->iobuf;
525
526 memset(command, 0, 8);
527 command[5] = 0xB0;
528 command[7] = 0x84;
529 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
530
531 US_DEBUGP("Result of send_control for device ID is %d\n",
532 result);
533
534 if (result != USB_STOR_XFER_GOOD)
535 return USB_STOR_TRANSPORT_ERROR;
536
537 result = sddr55_bulk_transport(us,
538 DMA_FROM_DEVICE, content, 4);
539
540 if (result != USB_STOR_XFER_GOOD)
541 return USB_STOR_TRANSPORT_ERROR;
542
543 *manufacturerID = content[0];
544 *deviceID = content[1];
545
546 if (content[0] != 0xff) {
547 result = sddr55_bulk_transport(us,
548 DMA_FROM_DEVICE, content, 2);
549 }
550
551 return USB_STOR_TRANSPORT_GOOD;
552}
553
554
70fcc005
AS		 555static int sddr55_reset(struct us_data *us)
556{
1da177e4
LT		 557 return 0;
558}
559
560
561static unsigned long sddr55_get_capacity(struct us_data *us) {
562
8a20acc5
AM		 563 unsigned char uninitialized_var(manufacturerID);
564 unsigned char uninitialized_var(deviceID);
1da177e4
LT		 565 int result;
566 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
567
568 US_DEBUGP("Reading capacity...\n");
569
570 result = sddr55_read_deviceID(us,
571 &manufacturerID,
572 &deviceID);
573
574 US_DEBUGP("Result of read_deviceID is %d\n",
575 result);
576
577 if (result != USB_STOR_XFER_GOOD)
578 return 0;
579
580 US_DEBUGP("Device ID = %02X\n", deviceID);
581 US_DEBUGP("Manuf ID = %02X\n", manufacturerID);
582
583 info->pageshift = 9;
584 info->smallpageshift = 0;
585 info->blocksize = 16;
586 info->blockshift = 4;
587 info->blockmask = 15;
588
589 switch (deviceID) {
590
591 case 0x6e: // 1MB
592 case 0xe8:
593 case 0xec:
594 info->pageshift = 8;
595 info->smallpageshift = 1;
596 return 0x00100000;
597
598 case 0xea: // 2MB
599 case 0x64:
600 info->pageshift = 8;
601 info->smallpageshift = 1;
602 case 0x5d: // 5d is a ROM card with pagesize 512.
603 return 0x00200000;
604
605 case 0xe3: // 4MB
606 case 0xe5:
607 case 0x6b:
608 case 0xd5:
609 return 0x00400000;
610
611 case 0xe6: // 8MB
612 case 0xd6:
613 return 0x00800000;
614
615 case 0x73: // 16MB
616 info->blocksize = 32;
617 info->blockshift = 5;
618 info->blockmask = 31;
619 return 0x01000000;
620
621 case 0x75: // 32MB
622 info->blocksize = 32;
623 info->blockshift = 5;
624 info->blockmask = 31;
625 return 0x02000000;
626
627 case 0x76: // 64MB
628 info->blocksize = 32;
629 info->blockshift = 5;
630 info->blockmask = 31;
631 return 0x04000000;
632
633 case 0x79: // 128MB
634 info->blocksize = 32;
635 info->blockshift = 5;
636 info->blockmask = 31;
637 return 0x08000000;
638
639 default: // unknown
640 return 0;
641
642 }
643}
644
645static int sddr55_read_map(struct us_data *us) {
646
647 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra);
648 int numblocks;
649 unsigned char *buffer;
650 unsigned char *command = us->iobuf;
651 int i;
652 unsigned short lba;
653 unsigned short max_lba;
654 int result;
655
656 if (!info->capacity)
657 return -1;
658
659 numblocks = info->capacity >> (info->blockshift + info->pageshift);
660
661 buffer = kmalloc( numblocks * 2, GFP_NOIO );
662
663 if (!buffer)
664 return -1;
665
666 memset(command, 0, 8);
667 command[5] = 0xB0;
668 command[6] = numblocks * 2 / 256;
669 command[7] = 0x8A;
670
671 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
672
673 if ( result != USB_STOR_XFER_GOOD) {
674 kfree (buffer);
675 return -1;
676 }
677
678 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
679
680 if ( result != USB_STOR_XFER_GOOD) {
681 kfree (buffer);
682 return -1;
683 }
684
685 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
686
687 if ( result != USB_STOR_XFER_GOOD) {
688 kfree (buffer);
689 return -1;
690 }
691
1bc3c9e1
JJ		 692 kfree(info->lba_to_pba);
693 kfree(info->pba_to_lba);
1da177e4
LT		 694 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
695 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
696
697 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
1bc3c9e1
JJ		 698 kfree(info->lba_to_pba);
699 kfree(info->pba_to_lba);
1da177e4
LT		 700 info->lba_to_pba = NULL;
701 info->pba_to_lba = NULL;
702 kfree(buffer);
703 return -1;
704 }
705
706 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
707 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
708
709 /* set maximum lba */
710 max_lba = info->max_log_blks;
711 if (max_lba > 1000)
712 max_lba = 1000;
713
714 // Each block is 64 bytes of control data, so block i is located in
715 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
716
717 for (i=0; i<numblocks; i++) {
718 int zone = i / 1024;
719
720 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
721
722 /* Every 1024 physical blocks ("zone"), the LBA numbers
723 * go back to zero, but are within a higher
724 * block of LBA's. Also, there is a maximum of
725 * 1000 LBA's per zone. In other words, in PBA
726 * 1024-2047 you will find LBA 0-999 which are
727 * really LBA 1000-1999. Yes, this wastes 24
728 * physical blocks per zone. Go figure.
729 * These devices can have blocks go bad, so there
730 * are 24 spare blocks to use when blocks do go bad.
731 */
732
733 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the
734 * CIS block. (Is this true for cards 8MB or less??)
735 * Record these in the physical to logical map
736 */
737
738 info->pba_to_lba[i] = lba;
739
740 if (lba >= max_lba) {
741 continue;
742 }
743
744 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
745 !info->force_read_only) {
6f8aa65b
FS		 746 printk(KERN_WARNING
747 "sddr55: map inconsistency at LBA %04X\n",
748 lba + zone * 1000);
1da177e4
LT		 749 info->force_read_only = 1;
750 }
751
752 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
753 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i);
754
755 info->lba_to_pba[lba + zone * 1000] = i;
756 }
757
758 kfree(buffer);
759 return 0;
760}
761
762
763static void sddr55_card_info_destructor(void *extra) {
764 struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
765
766 if (!extra)
767 return;
768
1bc3c9e1
JJ		 769 kfree(info->lba_to_pba);
770 kfree(info->pba_to_lba);
1da177e4
LT		 771}
772
773
774/*
775 * Transport for the Sandisk SDDR-55
776 */
70fcc005 777static int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
1da177e4
LT		 778{
779 int result;
780 static unsigned char inquiry_response[8] = {
781 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
782 };
783 // write-protected for now, no block descriptor support
784 static unsigned char mode_page_01[20] = {
785 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
786 0x01, 0x0A,
787 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
788 };
789 unsigned char *ptr = us->iobuf;
790 unsigned long capacity;
791 unsigned int lba;
792 unsigned int pba;
793 unsigned int page;
794 unsigned short pages;
795 struct sddr55_card_info *info;
796
797 if (!us->extra) {
887c2560 798 us->extra = kzalloc(
1da177e4
LT		 799 sizeof(struct sddr55_card_info), GFP_NOIO);
800 if (!us->extra)
801 return USB_STOR_TRANSPORT_ERROR;
1da177e4
LT		 802 us->extra_destructor = sddr55_card_info_destructor;
803 }
804
805 info = (struct sddr55_card_info *)(us->extra);
806
807 if (srb->cmnd[0] == REQUEST_SENSE) {
808 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]);
809
810 memcpy (ptr, info->sense_data, sizeof info->sense_data);
811 ptr[0] = 0x70;
812 ptr[7] = 11;
813 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
814 memset (info->sense_data, 0, sizeof info->sense_data);
815
816 return USB_STOR_TRANSPORT_GOOD;
817 }
818
819 memset (info->sense_data, 0, sizeof info->sense_data);
820
821 /* Dummy up a response for INQUIRY since SDDR55 doesn't
822 respond to INQUIRY commands */
823
824 if (srb->cmnd[0] == INQUIRY) {
825 memcpy(ptr, inquiry_response, 8);
826 fill_inquiry_response(us, ptr, 36);
827 return USB_STOR_TRANSPORT_GOOD;
828 }
829
830 /* only check card status if the map isn't allocated, ie no card seen yet
831 * or if it's been over half a second since we last accessed it
832 */
833 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
834
835 /* check to see if a card is fitted */
836 result = sddr55_status (us);
837 if (result) {
838 result = sddr55_status (us);
839 if (!result) {
840 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */
841 }
842 return USB_STOR_TRANSPORT_FAILED;
843 }
844 }
845
846 /* if we detected a problem with the map when writing,
847 don't allow any more access */
848 if (info->fatal_error) {
849
850 set_sense_info (3, 0x31, 0);
851 return USB_STOR_TRANSPORT_FAILED;
852 }
853
854 if (srb->cmnd[0] == READ_CAPACITY) {
855
856 capacity = sddr55_get_capacity(us);
857
858 if (!capacity) {
859 set_sense_info (3, 0x30, 0); /* incompatible medium */
860 return USB_STOR_TRANSPORT_FAILED;
861 }
862
863 info->capacity = capacity;
864
865 /* figure out the maximum logical block number, allowing for
866 * the fact that only 250 out of every 256 are used */
867 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
868
869 /* Last page in the card, adjust as we only use 250 out of
870 * every 256 pages */
871 capacity = (capacity / 256) * 250;
872
873 capacity /= PAGESIZE;
874 capacity--;
875
876 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
877 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
878 usb_stor_set_xfer_buf(ptr, 8, srb);
879
880 sddr55_read_map(us);
881
882 return USB_STOR_TRANSPORT_GOOD;
883 }
884
885 if (srb->cmnd[0] == MODE_SENSE_10) {
886
887 memcpy(ptr, mode_page_01, sizeof mode_page_01);
888 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
889 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
890
891 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
892 US_DEBUGP(
893 "SDDR55: Dummy up request for mode page 1\n");
894 return USB_STOR_TRANSPORT_GOOD;
895
896 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
897 US_DEBUGP(
898 "SDDR55: Dummy up request for all mode pages\n");
899 return USB_STOR_TRANSPORT_GOOD;
900 }
901
902 set_sense_info (5, 0x24, 0); /* invalid field in command */
903 return USB_STOR_TRANSPORT_FAILED;
904 }
905
906 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
907
908 US_DEBUGP(
909 "SDDR55: %s medium removal. Not that I can do"
910 " anything about it...\n",
911 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
912
913 return USB_STOR_TRANSPORT_GOOD;
914
915 }
916
917 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
918
919 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
920 page <<= 16;
921 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
922 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
923
924 page <<= info->smallpageshift;
925
926 // convert page to block and page-within-block
927
928 lba = page >> info->blockshift;
929 page = page & info->blockmask;
930
931 // locate physical block corresponding to logical block
932
933 if (lba >= info->max_log_blks) {
934
935 US_DEBUGP("Error: Requested LBA %04X exceeds maximum "
936 "block %04X\n", lba, info->max_log_blks-1);
937
938 set_sense_info (5, 0x24, 0); /* invalid field in command */
939
940 return USB_STOR_TRANSPORT_FAILED;
941 }
942
943 pba = info->lba_to_pba[lba];
944
945 if (srb->cmnd[0] == WRITE_10) {
946 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X"
947 " pages %d\n",
948 pba, lba, page, pages);
949
950 return sddr55_write_data(us, lba, page, pages);
951 } else {
952 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
953 " pages %d\n",
954 pba, lba, page, pages);
955
956 return sddr55_read_data(us, lba, page, pages);
957 }
958 }
959
960
961 if (srb->cmnd[0] == TEST_UNIT_READY) {
962 return USB_STOR_TRANSPORT_GOOD;
963 }
964
965 if (srb->cmnd[0] == START_STOP) {
966 return USB_STOR_TRANSPORT_GOOD;
967 }
968
969 set_sense_info (5, 0x20, 0); /* illegal command */
970
971 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
972}
973
70fcc005
AS		 974
975static int sddr55_probe(struct usb_interface *intf,
976 const struct usb_device_id *id)
977{
978 struct us_data *us;
979 int result;
980
981 result = usb_stor_probe1(&us, intf, id,
982 (id - sddr55_usb_ids) + sddr55_unusual_dev_list);
983 if (result)
984 return result;
985
986 us->transport_name = "SDDR55";
987 us->transport = sddr55_transport;
988 us->transport_reset = sddr55_reset;
989 us->max_lun = 0;
990
991 result = usb_stor_probe2(us);
992 return result;
993}
994
995static struct usb_driver sddr55_driver = {
996 .name = "ums-sddr55",
997 .probe = sddr55_probe,
998 .disconnect = usb_stor_disconnect,
999 .suspend = usb_stor_suspend,
1000 .resume = usb_stor_resume,
1001 .reset_resume = usb_stor_reset_resume,
1002 .pre_reset = usb_stor_pre_reset,
1003 .post_reset = usb_stor_post_reset,
1004 .id_table = sddr55_usb_ids,
1005 .soft_unbind = 1,
1006};
1007
1008static int __init sddr55_init(void)
1009{
1010 return usb_register(&sddr55_driver);
1011}
1012
1013static void __exit sddr55_exit(void)
1014{
1015 usb_deregister(&sddr55_driver);
1016}
1017
1018module_init(sddr55_init);
1019module_exit(sddr55_exit);
Linux kernel - Deliverables
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