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usb-storage: make isd200 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>
27#include <linux/slab.h>
28
29#include <scsi/scsi.h>
30#include <scsi/scsi_cmnd.h>
31
32#include "usb.h"
33#include "transport.h"
34#include "protocol.h"
35#include "debug.h"
36#include "sddr55.h"
37
38
39#define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
40#define LSB_of(s) ((s)&0xFF)
41#define MSB_of(s) ((s)>>8)
42#define PAGESIZE 512
43
44#define set_sense_info(sk, asc, ascq) \
45 do { \
46 info->sense_data[2] = sk; \
47 info->sense_data[12] = asc; \
48 info->sense_data[13] = ascq; \
49 } while (0)
50
51
52struct sddr55_card_info {
53 unsigned long capacity; /* Size of card in bytes */
54 int max_log_blks; /* maximum number of logical blocks */
55 int pageshift; /* log2 of pagesize */
56 int smallpageshift; /* 1 if pagesize == 256 */
57 int blocksize; /* Size of block in pages */
58 int blockshift; /* log2 of blocksize */
59 int blockmask; /* 2^blockshift - 1 */
60 int read_only; /* non zero if card is write protected */
61 int force_read_only; /* non zero if we find a map error*/
62 int *lba_to_pba; /* logical to physical map */
63 int *pba_to_lba; /* physical to logical map */
64 int fatal_error; /* set if we detect something nasty */
65 unsigned long last_access; /* number of jiffies since we last talked to device */
66 unsigned char sense_data[18];
67};
68
69
70#define NOT_ALLOCATED 0xffffffff
71#define BAD_BLOCK 0xffff
72#define CIS_BLOCK 0x400
73#define UNUSED_BLOCK 0x3ff
74
75static int
76sddr55_bulk_transport(struct us_data *us, int direction,
77 unsigned char *data, unsigned int len) {
78 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
79 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
80 us->recv_bulk_pipe : us->send_bulk_pipe;
81
82 if (!len)
83 return USB_STOR_XFER_GOOD;
84 info->last_access = jiffies;
85 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
86}
87
88/* check if card inserted, if there is, update read_only status
89 * return non zero if no card
90 */
91
92static int sddr55_status(struct us_data *us)
93{
94 int result;
95 unsigned char *command = us->iobuf;
96 unsigned char *status = us->iobuf;
97 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
98
99 /* send command */
100 memset(command, 0, 8);
101 command[5] = 0xB0;
102 command[7] = 0x80;
103 result = sddr55_bulk_transport(us,
104 DMA_TO_DEVICE, command, 8);
105
106 US_DEBUGP("Result for send_command in status %d\n",
107 result);
108
109 if (result != USB_STOR_XFER_GOOD) {
110 set_sense_info (4, 0, 0); /* hardware error */
111 return USB_STOR_TRANSPORT_ERROR;
112 }
113
114 result = sddr55_bulk_transport(us,
115 DMA_FROM_DEVICE, status, 4);
116
117 /* expect to get short transfer if no card fitted */
118 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
119 /* had a short transfer, no card inserted, free map memory */
1bc3c9e1
JJ		 120 kfree(info->lba_to_pba);
121 kfree(info->pba_to_lba);
1da177e4
LT		 122 info->lba_to_pba = NULL;
123 info->pba_to_lba = NULL;
124
125 info->fatal_error = 0;
126 info->force_read_only = 0;
127
128 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */
129 return USB_STOR_TRANSPORT_FAILED;
130 }
131
132 if (result != USB_STOR_XFER_GOOD) {
133 set_sense_info (4, 0, 0); /* hardware error */
134 return USB_STOR_TRANSPORT_FAILED;
135 }
136
137 /* check write protect status */
138 info->read_only = (status[0] & 0x20);
139
140 /* now read status */
141 result = sddr55_bulk_transport(us,
142 DMA_FROM_DEVICE, status, 2);
143
144 if (result != USB_STOR_XFER_GOOD) {
145 set_sense_info (4, 0, 0); /* hardware error */
146 }
147
148 return (result == USB_STOR_XFER_GOOD ?
149 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
150}
151
152
153static int sddr55_read_data(struct us_data *us,
154 unsigned int lba,
155 unsigned int page,
156 unsigned short sectors) {
157
158 int result = USB_STOR_TRANSPORT_GOOD;
159 unsigned char *command = us->iobuf;
160 unsigned char *status = us->iobuf;
161 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
162 unsigned char *buffer;
163
164 unsigned int pba;
165 unsigned long address;
166
167 unsigned short pages;
1f6f31a0
JA		 168 unsigned int len, offset;
169 struct scatterlist *sg;
1da177e4
LT		 170
171 // Since we only read in one block at a time, we have to create
172 // a bounce buffer and move the data a piece at a time between the
173 // bounce buffer and the actual transfer buffer.
174
175 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
176 info->smallpageshift) * PAGESIZE;
177 buffer = kmalloc(len, GFP_NOIO);
178 if (buffer == NULL)
179 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
1f6f31a0
JA		 180 offset = 0;
181 sg = NULL;
1da177e4
LT		 182
183 while (sectors>0) {
184
185 /* have we got to end? */
186 if (lba >= info->max_log_blks)
187 break;
188
189 pba = info->lba_to_pba[lba];
190
191 // Read as many sectors as possible in this block
192
193 pages = min((unsigned int) sectors << info->smallpageshift,
194 info->blocksize - page);
195 len = pages << info->pageshift;
196
197 US_DEBUGP("Read %02X pages, from PBA %04X"
198 " (LBA %04X) page %02X\n",
199 pages, pba, lba, page);
200
201 if (pba == NOT_ALLOCATED) {
202 /* no pba for this lba, fill with zeroes */
203 memset (buffer, 0, len);
204 } else {
205
206 address = (pba << info->blockshift) + page;
207
208 command[0] = 0;
209 command[1] = LSB_of(address>>16);
210 command[2] = LSB_of(address>>8);
211 command[3] = LSB_of(address);
212
213 command[4] = 0;
214 command[5] = 0xB0;
215 command[6] = LSB_of(pages << (1 - info->smallpageshift));
216 command[7] = 0x85;
217
218 /* send command */
219 result = sddr55_bulk_transport(us,
220 DMA_TO_DEVICE, command, 8);
221
222 US_DEBUGP("Result for send_command in read_data %d\n",
223 result);
224
225 if (result != USB_STOR_XFER_GOOD) {
226 result = USB_STOR_TRANSPORT_ERROR;
227 goto leave;
228 }
229
230 /* read data */
231 result = sddr55_bulk_transport(us,
232 DMA_FROM_DEVICE, buffer, len);
233
234 if (result != USB_STOR_XFER_GOOD) {
235 result = USB_STOR_TRANSPORT_ERROR;
236 goto leave;
237 }
238
239 /* now read status */
240 result = sddr55_bulk_transport(us,
241 DMA_FROM_DEVICE, status, 2);
242
243 if (result != USB_STOR_XFER_GOOD) {
244 result = USB_STOR_TRANSPORT_ERROR;
245 goto leave;
246 }
247
248 /* check status for error */
249 if (status[0] == 0xff && status[1] == 0x4) {
250 set_sense_info (3, 0x11, 0);
251 result = USB_STOR_TRANSPORT_FAILED;
252 goto leave;
253 }
254 }
255
256 // Store the data in the transfer buffer
257 usb_stor_access_xfer_buf(buffer, len, us->srb,
1f6f31a0 258 &sg, &offset, TO_XFER_BUF);
1da177e4
LT		 259
260 page = 0;
261 lba++;
262 sectors -= pages >> info->smallpageshift;
263 }
264
265 result = USB_STOR_TRANSPORT_GOOD;
266
267leave:
268 kfree(buffer);
269
270 return result;
271}
272
273static int sddr55_write_data(struct us_data *us,
274 unsigned int lba,
275 unsigned int page,
276 unsigned short sectors) {
277
278 int result = USB_STOR_TRANSPORT_GOOD;
279 unsigned char *command = us->iobuf;
280 unsigned char *status = us->iobuf;
281 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
282 unsigned char *buffer;
283
284 unsigned int pba;
285 unsigned int new_pba;
286 unsigned long address;
287
288 unsigned short pages;
289 int i;
1f6f31a0
JA		 290 unsigned int len, offset;
291 struct scatterlist *sg;
1da177e4
LT		 292
293 /* check if we are allowed to write */
294 if (info->read_only || info->force_read_only) {
295 set_sense_info (7, 0x27, 0); /* read only */
296 return USB_STOR_TRANSPORT_FAILED;
297 }
298
299 // Since we only write one block at a time, we have to create
300 // a bounce buffer and move the data a piece at a time between the
301 // bounce buffer and the actual transfer buffer.
302
303 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
304 info->smallpageshift) * PAGESIZE;
305 buffer = kmalloc(len, GFP_NOIO);
306 if (buffer == NULL)
307 return USB_STOR_TRANSPORT_ERROR;
1f6f31a0
JA		 308 offset = 0;
309 sg = NULL;
1da177e4
LT		 310
311 while (sectors > 0) {
312
313 /* have we got to end? */
314 if (lba >= info->max_log_blks)
315 break;
316
317 pba = info->lba_to_pba[lba];
318
319 // Write as many sectors as possible in this block
320
321 pages = min((unsigned int) sectors << info->smallpageshift,
322 info->blocksize - page);
323 len = pages << info->pageshift;
324
325 // Get the data from the transfer buffer
326 usb_stor_access_xfer_buf(buffer, len, us->srb,
1f6f31a0 327 &sg, &offset, FROM_XFER_BUF);
1da177e4
LT		 328
329 US_DEBUGP("Write %02X pages, to PBA %04X"
330 " (LBA %04X) page %02X\n",
331 pages, pba, lba, page);
332
333 command[4] = 0;
334
335 if (pba == NOT_ALLOCATED) {
336 /* no pba allocated for this lba, find a free pba to use */
337
338 int max_pba = (info->max_log_blks / 250 ) * 256;
339 int found_count = 0;
340 int found_pba = -1;
341
342 /* set pba to first block in zone lba is in */
343 pba = (lba / 1000) * 1024;
344
345 US_DEBUGP("No PBA for LBA %04X\n",lba);
346
347 if (max_pba > 1024)
348 max_pba = 1024;
349
350 /*
351 * Scan through the map looking for an unused block
352 * leave 16 unused blocks at start (or as many as
353 * possible) since the sddr55 seems to reuse a used
354 * block when it shouldn't if we don't leave space.
355 */
356 for (i = 0; i < max_pba; i++, pba++) {
357 if (info->pba_to_lba[pba] == UNUSED_BLOCK) {
358 found_pba = pba;
359 if (found_count++ > 16)
360 break;
361 }
362 }
363
364 pba = found_pba;
365
366 if (pba == -1) {
367 /* oh dear */
368 US_DEBUGP("Couldn't find unallocated block\n");
369
370 set_sense_info (3, 0x31, 0); /* medium error */
371 result = USB_STOR_TRANSPORT_FAILED;
372 goto leave;
373 }
374
375 US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba);
376
377 /* set writing to unallocated block flag */
378 command[4] = 0x40;
379 }
380
381 address = (pba << info->blockshift) + page;
382
383 command[1] = LSB_of(address>>16);
384 command[2] = LSB_of(address>>8);
385 command[3] = LSB_of(address);
386
387 /* set the lba into the command, modulo 1000 */
388 command[0] = LSB_of(lba % 1000);
389 command[6] = MSB_of(lba % 1000);
390
391 command[4] |= LSB_of(pages >> info->smallpageshift);
392 command[5] = 0xB0;
393 command[7] = 0x86;
394
395 /* send command */
396 result = sddr55_bulk_transport(us,
397 DMA_TO_DEVICE, command, 8);
398
399 if (result != USB_STOR_XFER_GOOD) {
400 US_DEBUGP("Result for send_command in write_data %d\n",
401 result);
402
403 /* set_sense_info is superfluous here? */
404 set_sense_info (3, 0x3, 0);/* peripheral write error */
405 result = USB_STOR_TRANSPORT_FAILED;
406 goto leave;
407 }
408
409 /* send the data */
410 result = sddr55_bulk_transport(us,
411 DMA_TO_DEVICE, buffer, len);
412
413 if (result != USB_STOR_XFER_GOOD) {
414 US_DEBUGP("Result for send_data in write_data %d\n",
415 result);
416
417 /* set_sense_info is superfluous here? */
418 set_sense_info (3, 0x3, 0);/* peripheral write error */
419 result = USB_STOR_TRANSPORT_FAILED;
420 goto leave;
421 }
422
423 /* now read status */
424 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
425
426 if (result != USB_STOR_XFER_GOOD) {
427 US_DEBUGP("Result for get_status in write_data %d\n",
428 result);
429
430 /* set_sense_info is superfluous here? */
431 set_sense_info (3, 0x3, 0);/* peripheral write error */
432 result = USB_STOR_TRANSPORT_FAILED;
433 goto leave;
434 }
435
436 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
437 >> info->blockshift;
438
439 /* check status for error */
440 if (status[0] == 0xff && status[1] == 0x4) {
441 info->pba_to_lba[new_pba] = BAD_BLOCK;
442
443 set_sense_info (3, 0x0c, 0);
444 result = USB_STOR_TRANSPORT_FAILED;
445 goto leave;
446 }
447
448 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
449 lba, pba, new_pba);
450
451 /* update the lba<->pba maps, note new_pba might be the same as pba */
452 info->lba_to_pba[lba] = new_pba;
453 info->pba_to_lba[pba] = UNUSED_BLOCK;
454
455 /* check that new_pba wasn't already being used */
456 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
457 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
458 new_pba, info->pba_to_lba[new_pba]);
459 info->fatal_error = 1;
460 set_sense_info (3, 0x31, 0);
461 result = USB_STOR_TRANSPORT_FAILED;
462 goto leave;
463 }
464
465 /* update the pba<->lba maps for new_pba */
466 info->pba_to_lba[new_pba] = lba % 1000;
467
468 page = 0;
469 lba++;
470 sectors -= pages >> info->smallpageshift;
471 }
472 result = USB_STOR_TRANSPORT_GOOD;
473
474 leave:
475 kfree(buffer);
476 return result;
477}
478
479static int sddr55_read_deviceID(struct us_data *us,
480 unsigned char *manufacturerID,
481 unsigned char *deviceID) {
482
483 int result;
484 unsigned char *command = us->iobuf;
485 unsigned char *content = us->iobuf;
486
487 memset(command, 0, 8);
488 command[5] = 0xB0;
489 command[7] = 0x84;
490 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
491
492 US_DEBUGP("Result of send_control for device ID is %d\n",
493 result);
494
495 if (result != USB_STOR_XFER_GOOD)
496 return USB_STOR_TRANSPORT_ERROR;
497
498 result = sddr55_bulk_transport(us,
499 DMA_FROM_DEVICE, content, 4);
500
501 if (result != USB_STOR_XFER_GOOD)
502 return USB_STOR_TRANSPORT_ERROR;
503
504 *manufacturerID = content[0];
505 *deviceID = content[1];
506
507 if (content[0] != 0xff) {
508 result = sddr55_bulk_transport(us,
509 DMA_FROM_DEVICE, content, 2);
510 }
511
512 return USB_STOR_TRANSPORT_GOOD;
513}
514
515
516int sddr55_reset(struct us_data *us) {
517 return 0;
518}
519
520
521static unsigned long sddr55_get_capacity(struct us_data *us) {
522
8a20acc5
AM		 523 unsigned char uninitialized_var(manufacturerID);
524 unsigned char uninitialized_var(deviceID);
1da177e4
LT		 525 int result;
526 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
527
528 US_DEBUGP("Reading capacity...\n");
529
530 result = sddr55_read_deviceID(us,
531 &manufacturerID,
532 &deviceID);
533
534 US_DEBUGP("Result of read_deviceID is %d\n",
535 result);
536
537 if (result != USB_STOR_XFER_GOOD)
538 return 0;
539
540 US_DEBUGP("Device ID = %02X\n", deviceID);
541 US_DEBUGP("Manuf ID = %02X\n", manufacturerID);
542
543 info->pageshift = 9;
544 info->smallpageshift = 0;
545 info->blocksize = 16;
546 info->blockshift = 4;
547 info->blockmask = 15;
548
549 switch (deviceID) {
550
551 case 0x6e: // 1MB
552 case 0xe8:
553 case 0xec:
554 info->pageshift = 8;
555 info->smallpageshift = 1;
556 return 0x00100000;
557
558 case 0xea: // 2MB
559 case 0x64:
560 info->pageshift = 8;
561 info->smallpageshift = 1;
562 case 0x5d: // 5d is a ROM card with pagesize 512.
563 return 0x00200000;
564
565 case 0xe3: // 4MB
566 case 0xe5:
567 case 0x6b:
568 case 0xd5:
569 return 0x00400000;
570
571 case 0xe6: // 8MB
572 case 0xd6:
573 return 0x00800000;
574
575 case 0x73: // 16MB
576 info->blocksize = 32;
577 info->blockshift = 5;
578 info->blockmask = 31;
579 return 0x01000000;
580
581 case 0x75: // 32MB
582 info->blocksize = 32;
583 info->blockshift = 5;
584 info->blockmask = 31;
585 return 0x02000000;
586
587 case 0x76: // 64MB
588 info->blocksize = 32;
589 info->blockshift = 5;
590 info->blockmask = 31;
591 return 0x04000000;
592
593 case 0x79: // 128MB
594 info->blocksize = 32;
595 info->blockshift = 5;
596 info->blockmask = 31;
597 return 0x08000000;
598
599 default: // unknown
600 return 0;
601
602 }
603}
604
605static int sddr55_read_map(struct us_data *us) {
606
607 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra);
608 int numblocks;
609 unsigned char *buffer;
610 unsigned char *command = us->iobuf;
611 int i;
612 unsigned short lba;
613 unsigned short max_lba;
614 int result;
615
616 if (!info->capacity)
617 return -1;
618
619 numblocks = info->capacity >> (info->blockshift + info->pageshift);
620
621 buffer = kmalloc( numblocks * 2, GFP_NOIO );
622
623 if (!buffer)
624 return -1;
625
626 memset(command, 0, 8);
627 command[5] = 0xB0;
628 command[6] = numblocks * 2 / 256;
629 command[7] = 0x8A;
630
631 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
632
633 if ( result != USB_STOR_XFER_GOOD) {
634 kfree (buffer);
635 return -1;
636 }
637
638 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
639
640 if ( result != USB_STOR_XFER_GOOD) {
641 kfree (buffer);
642 return -1;
643 }
644
645 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
646
647 if ( result != USB_STOR_XFER_GOOD) {
648 kfree (buffer);
649 return -1;
650 }
651
1bc3c9e1
JJ		 652 kfree(info->lba_to_pba);
653 kfree(info->pba_to_lba);
1da177e4
LT		 654 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
655 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
656
657 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
1bc3c9e1
JJ		 658 kfree(info->lba_to_pba);
659 kfree(info->pba_to_lba);
1da177e4
LT		 660 info->lba_to_pba = NULL;
661 info->pba_to_lba = NULL;
662 kfree(buffer);
663 return -1;
664 }
665
666 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
667 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
668
669 /* set maximum lba */
670 max_lba = info->max_log_blks;
671 if (max_lba > 1000)
672 max_lba = 1000;
673
674 // Each block is 64 bytes of control data, so block i is located in
675 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
676
677 for (i=0; i<numblocks; i++) {
678 int zone = i / 1024;
679
680 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
681
682 /* Every 1024 physical blocks ("zone"), the LBA numbers
683 * go back to zero, but are within a higher
684 * block of LBA's. Also, there is a maximum of
685 * 1000 LBA's per zone. In other words, in PBA
686 * 1024-2047 you will find LBA 0-999 which are
687 * really LBA 1000-1999. Yes, this wastes 24
688 * physical blocks per zone. Go figure.
689 * These devices can have blocks go bad, so there
690 * are 24 spare blocks to use when blocks do go bad.
691 */
692
693 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the
694 * CIS block. (Is this true for cards 8MB or less??)
695 * Record these in the physical to logical map
696 */
697
698 info->pba_to_lba[i] = lba;
699
700 if (lba >= max_lba) {
701 continue;
702 }
703
704 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
705 !info->force_read_only) {
6f8aa65b
FS		 706 printk(KERN_WARNING
707 "sddr55: map inconsistency at LBA %04X\n",
708 lba + zone * 1000);
1da177e4
LT		 709 info->force_read_only = 1;
710 }
711
712 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
713 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i);
714
715 info->lba_to_pba[lba + zone * 1000] = i;
716 }
717
718 kfree(buffer);
719 return 0;
720}
721
722
723static void sddr55_card_info_destructor(void *extra) {
724 struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
725
726 if (!extra)
727 return;
728
1bc3c9e1
JJ		 729 kfree(info->lba_to_pba);
730 kfree(info->pba_to_lba);
1da177e4
LT		 731}
732
733
734/*
735 * Transport for the Sandisk SDDR-55
736 */
737int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
738{
739 int result;
740 static unsigned char inquiry_response[8] = {
741 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
742 };
743 // write-protected for now, no block descriptor support
744 static unsigned char mode_page_01[20] = {
745 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
746 0x01, 0x0A,
747 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
748 };
749 unsigned char *ptr = us->iobuf;
750 unsigned long capacity;
751 unsigned int lba;
752 unsigned int pba;
753 unsigned int page;
754 unsigned short pages;
755 struct sddr55_card_info *info;
756
757 if (!us->extra) {
887c2560 758 us->extra = kzalloc(
1da177e4
LT		 759 sizeof(struct sddr55_card_info), GFP_NOIO);
760 if (!us->extra)
761 return USB_STOR_TRANSPORT_ERROR;
1da177e4
LT		 762 us->extra_destructor = sddr55_card_info_destructor;
763 }
764
765 info = (struct sddr55_card_info *)(us->extra);
766
767 if (srb->cmnd[0] == REQUEST_SENSE) {
768 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]);
769
770 memcpy (ptr, info->sense_data, sizeof info->sense_data);
771 ptr[0] = 0x70;
772 ptr[7] = 11;
773 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
774 memset (info->sense_data, 0, sizeof info->sense_data);
775
776 return USB_STOR_TRANSPORT_GOOD;
777 }
778
779 memset (info->sense_data, 0, sizeof info->sense_data);
780
781 /* Dummy up a response for INQUIRY since SDDR55 doesn't
782 respond to INQUIRY commands */
783
784 if (srb->cmnd[0] == INQUIRY) {
785 memcpy(ptr, inquiry_response, 8);
786 fill_inquiry_response(us, ptr, 36);
787 return USB_STOR_TRANSPORT_GOOD;
788 }
789
790 /* only check card status if the map isn't allocated, ie no card seen yet
791 * or if it's been over half a second since we last accessed it
792 */
793 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
794
795 /* check to see if a card is fitted */
796 result = sddr55_status (us);
797 if (result) {
798 result = sddr55_status (us);
799 if (!result) {
800 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */
801 }
802 return USB_STOR_TRANSPORT_FAILED;
803 }
804 }
805
806 /* if we detected a problem with the map when writing,
807 don't allow any more access */
808 if (info->fatal_error) {
809
810 set_sense_info (3, 0x31, 0);
811 return USB_STOR_TRANSPORT_FAILED;
812 }
813
814 if (srb->cmnd[0] == READ_CAPACITY) {
815
816 capacity = sddr55_get_capacity(us);
817
818 if (!capacity) {
819 set_sense_info (3, 0x30, 0); /* incompatible medium */
820 return USB_STOR_TRANSPORT_FAILED;
821 }
822
823 info->capacity = capacity;
824
825 /* figure out the maximum logical block number, allowing for
826 * the fact that only 250 out of every 256 are used */
827 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
828
829 /* Last page in the card, adjust as we only use 250 out of
830 * every 256 pages */
831 capacity = (capacity / 256) * 250;
832
833 capacity /= PAGESIZE;
834 capacity--;
835
836 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
837 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
838 usb_stor_set_xfer_buf(ptr, 8, srb);
839
840 sddr55_read_map(us);
841
842 return USB_STOR_TRANSPORT_GOOD;
843 }
844
845 if (srb->cmnd[0] == MODE_SENSE_10) {
846
847 memcpy(ptr, mode_page_01, sizeof mode_page_01);
848 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
849 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
850
851 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
852 US_DEBUGP(
853 "SDDR55: Dummy up request for mode page 1\n");
854 return USB_STOR_TRANSPORT_GOOD;
855
856 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
857 US_DEBUGP(
858 "SDDR55: Dummy up request for all mode pages\n");
859 return USB_STOR_TRANSPORT_GOOD;
860 }
861
862 set_sense_info (5, 0x24, 0); /* invalid field in command */
863 return USB_STOR_TRANSPORT_FAILED;
864 }
865
866 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
867
868 US_DEBUGP(
869 "SDDR55: %s medium removal. Not that I can do"
870 " anything about it...\n",
871 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
872
873 return USB_STOR_TRANSPORT_GOOD;
874
875 }
876
877 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
878
879 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
880 page <<= 16;
881 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
882 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
883
884 page <<= info->smallpageshift;
885
886 // convert page to block and page-within-block
887
888 lba = page >> info->blockshift;
889 page = page & info->blockmask;
890
891 // locate physical block corresponding to logical block
892
893 if (lba >= info->max_log_blks) {
894
895 US_DEBUGP("Error: Requested LBA %04X exceeds maximum "
896 "block %04X\n", lba, info->max_log_blks-1);
897
898 set_sense_info (5, 0x24, 0); /* invalid field in command */
899
900 return USB_STOR_TRANSPORT_FAILED;
901 }
902
903 pba = info->lba_to_pba[lba];
904
905 if (srb->cmnd[0] == WRITE_10) {
906 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X"
907 " pages %d\n",
908 pba, lba, page, pages);
909
910 return sddr55_write_data(us, lba, page, pages);
911 } else {
912 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
913 " pages %d\n",
914 pba, lba, page, pages);
915
916 return sddr55_read_data(us, lba, page, pages);
917 }
918 }
919
920
921 if (srb->cmnd[0] == TEST_UNIT_READY) {
922 return USB_STOR_TRANSPORT_GOOD;
923 }
924
925 if (srb->cmnd[0] == START_STOP) {
926 return USB_STOR_TRANSPORT_GOOD;
927 }
928
929 set_sense_info (5, 0x20, 0); /* illegal command */
930
931 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
932}
933
Linux kernel - Deliverables
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