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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/storage/sddr55.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/usb/storage/sddr55.c')
-rw-r--r--drivers/usb/storage/sddr55.c938
1 files changed, 938 insertions, 0 deletions
diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
new file mode 100644
index 000000000000..229ca181716b
--- /dev/null
+++ b/drivers/usb/storage/sddr55.c
@@ -0,0 +1,938 @@
1/* Driver for SanDisk SDDR-55 SmartMedia reader
2 *
3 * $Id:$
4 *
5 * SDDR55 driver v0.1:
6 *
7 * First release
8 *
9 * Current development and maintenance by:
10 * (c) 2002 Simon Munton
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2, or (at your option) any
15 * later version.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27#include <linux/jiffies.h>
28#include <linux/errno.h>
29#include <linux/slab.h>
30
31#include <scsi/scsi.h>
32#include <scsi/scsi_cmnd.h>
33
34#include "usb.h"
35#include "transport.h"
36#include "protocol.h"
37#include "debug.h"
38#include "sddr55.h"
39
40
41#define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
42#define LSB_of(s) ((s)&0xFF)
43#define MSB_of(s) ((s)>>8)
44#define PAGESIZE 512
45
46#define set_sense_info(sk, asc, ascq) \
47 do { \
48 info->sense_data[2] = sk; \
49 info->sense_data[12] = asc; \
50 info->sense_data[13] = ascq; \
51 } while (0)
52
53
54struct sddr55_card_info {
55 unsigned long capacity; /* Size of card in bytes */
56 int max_log_blks; /* maximum number of logical blocks */
57 int pageshift; /* log2 of pagesize */
58 int smallpageshift; /* 1 if pagesize == 256 */
59 int blocksize; /* Size of block in pages */
60 int blockshift; /* log2 of blocksize */
61 int blockmask; /* 2^blockshift - 1 */
62 int read_only; /* non zero if card is write protected */
63 int force_read_only; /* non zero if we find a map error*/
64 int *lba_to_pba; /* logical to physical map */
65 int *pba_to_lba; /* physical to logical map */
66 int fatal_error; /* set if we detect something nasty */
67 unsigned long last_access; /* number of jiffies since we last talked to device */
68 unsigned char sense_data[18];
69};
70
71
72#define NOT_ALLOCATED 0xffffffff
73#define BAD_BLOCK 0xffff
74#define CIS_BLOCK 0x400
75#define UNUSED_BLOCK 0x3ff
76
77static int
78sddr55_bulk_transport(struct us_data *us, int direction,
79 unsigned char *data, unsigned int len) {
80 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
81 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
82 us->recv_bulk_pipe : us->send_bulk_pipe;
83
84 if (!len)
85 return USB_STOR_XFER_GOOD;
86 info->last_access = jiffies;
87 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
88}
89
90/* check if card inserted, if there is, update read_only status
91 * return non zero if no card
92 */
93
94static int sddr55_status(struct us_data *us)
95{
96 int result;
97 unsigned char *command = us->iobuf;
98 unsigned char *status = us->iobuf;
99 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
100
101 /* send command */
102 memset(command, 0, 8);
103 command[5] = 0xB0;
104 command[7] = 0x80;
105 result = sddr55_bulk_transport(us,
106 DMA_TO_DEVICE, command, 8);
107
108 US_DEBUGP("Result for send_command in status %d\n",
109 result);
110
111 if (result != USB_STOR_XFER_GOOD) {
112 set_sense_info (4, 0, 0); /* hardware error */
113 return USB_STOR_TRANSPORT_ERROR;
114 }
115
116 result = sddr55_bulk_transport(us,
117 DMA_FROM_DEVICE, status, 4);
118
119 /* expect to get short transfer if no card fitted */
120 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
121 /* had a short transfer, no card inserted, free map memory */
122 if (info->lba_to_pba)
123 kfree(info->lba_to_pba);
124 if (info->pba_to_lba)
125 kfree(info->pba_to_lba);
126 info->lba_to_pba = NULL;
127 info->pba_to_lba = NULL;
128
129 info->fatal_error = 0;
130 info->force_read_only = 0;
131
132 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */
133 return USB_STOR_TRANSPORT_FAILED;
134 }
135
136 if (result != USB_STOR_XFER_GOOD) {
137 set_sense_info (4, 0, 0); /* hardware error */
138 return USB_STOR_TRANSPORT_FAILED;
139 }
140
141 /* check write protect status */
142 info->read_only = (status[0] & 0x20);
143
144 /* now read status */
145 result = sddr55_bulk_transport(us,
146 DMA_FROM_DEVICE, status, 2);
147
148 if (result != USB_STOR_XFER_GOOD) {
149 set_sense_info (4, 0, 0); /* hardware error */
150 }
151
152 return (result == USB_STOR_XFER_GOOD ?
153 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
154}
155
156
157static int sddr55_read_data(struct us_data *us,
158 unsigned int lba,
159 unsigned int page,
160 unsigned short sectors) {
161
162 int result = USB_STOR_TRANSPORT_GOOD;
163 unsigned char *command = us->iobuf;
164 unsigned char *status = us->iobuf;
165 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
166 unsigned char *buffer;
167
168 unsigned int pba;
169 unsigned long address;
170
171 unsigned short pages;
172 unsigned int len, index, offset;
173
174 // Since we only read in one block at a time, we have to create
175 // a bounce buffer and move the data a piece at a time between the
176 // bounce buffer and the actual transfer buffer.
177
178 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
179 info->smallpageshift) * PAGESIZE;
180 buffer = kmalloc(len, GFP_NOIO);
181 if (buffer == NULL)
182 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
183 index = offset = 0;
184
185 while (sectors>0) {
186
187 /* have we got to end? */
188 if (lba >= info->max_log_blks)
189 break;
190
191 pba = info->lba_to_pba[lba];
192
193 // Read as many sectors as possible in this block
194
195 pages = min((unsigned int) sectors << info->smallpageshift,
196 info->blocksize - page);
197 len = pages << info->pageshift;
198
199 US_DEBUGP("Read %02X pages, from PBA %04X"
200 " (LBA %04X) page %02X\n",
201 pages, pba, lba, page);
202
203 if (pba == NOT_ALLOCATED) {
204 /* no pba for this lba, fill with zeroes */
205 memset (buffer, 0, len);
206 } else {
207
208 address = (pba << info->blockshift) + page;
209
210 command[0] = 0;
211 command[1] = LSB_of(address>>16);
212 command[2] = LSB_of(address>>8);
213 command[3] = LSB_of(address);
214
215 command[4] = 0;
216 command[5] = 0xB0;
217 command[6] = LSB_of(pages << (1 - info->smallpageshift));
218 command[7] = 0x85;
219
220 /* send command */
221 result = sddr55_bulk_transport(us,
222 DMA_TO_DEVICE, command, 8);
223
224 US_DEBUGP("Result for send_command in read_data %d\n",
225 result);
226
227 if (result != USB_STOR_XFER_GOOD) {
228 result = USB_STOR_TRANSPORT_ERROR;
229 goto leave;
230 }
231
232 /* read data */
233 result = sddr55_bulk_transport(us,
234 DMA_FROM_DEVICE, buffer, len);
235
236 if (result != USB_STOR_XFER_GOOD) {
237 result = USB_STOR_TRANSPORT_ERROR;
238 goto leave;
239 }
240
241 /* now read status */
242 result = sddr55_bulk_transport(us,
243 DMA_FROM_DEVICE, status, 2);
244
245 if (result != USB_STOR_XFER_GOOD) {
246 result = USB_STOR_TRANSPORT_ERROR;
247 goto leave;
248 }
249
250 /* check status for error */
251 if (status[0] == 0xff && status[1] == 0x4) {
252 set_sense_info (3, 0x11, 0);
253 result = USB_STOR_TRANSPORT_FAILED;
254 goto leave;
255 }
256 }
257
258 // Store the data in the transfer buffer
259 usb_stor_access_xfer_buf(buffer, len, us->srb,
260 &index, &offset, TO_XFER_BUF);
261
262 page = 0;
263 lba++;
264 sectors -= pages >> info->smallpageshift;
265 }
266
267 result = USB_STOR_TRANSPORT_GOOD;
268
269leave:
270 kfree(buffer);
271
272 return result;
273}
274
275static int sddr55_write_data(struct us_data *us,
276 unsigned int lba,
277 unsigned int page,
278 unsigned short sectors) {
279
280 int result = USB_STOR_TRANSPORT_GOOD;
281 unsigned char *command = us->iobuf;
282 unsigned char *status = us->iobuf;
283 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
284 unsigned char *buffer;
285
286 unsigned int pba;
287 unsigned int new_pba;
288 unsigned long address;
289
290 unsigned short pages;
291 int i;
292 unsigned int len, index, offset;
293
294 /* check if we are allowed to write */
295 if (info->read_only || info->force_read_only) {
296 set_sense_info (7, 0x27, 0); /* read only */
297 return USB_STOR_TRANSPORT_FAILED;
298 }
299
300 // Since we only write one block at a time, we have to create
301 // a bounce buffer and move the data a piece at a time between the
302 // bounce buffer and the actual transfer buffer.
303
304 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
305 info->smallpageshift) * PAGESIZE;
306 buffer = kmalloc(len, GFP_NOIO);
307 if (buffer == NULL)
308 return USB_STOR_TRANSPORT_ERROR;
309 index = offset = 0;
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,
327 &index, &offset, FROM_XFER_BUF);
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
523 unsigned char manufacturerID;
524 unsigned char deviceID;
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
652 if (info->lba_to_pba)
653 kfree(info->lba_to_pba);
654 if (info->pba_to_lba)
655 kfree(info->pba_to_lba);
656 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
657 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
658
659 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
660 if (info->lba_to_pba != NULL)
661 kfree(info->lba_to_pba);
662 if (info->pba_to_lba != NULL)
663 kfree(info->pba_to_lba);
664 info->lba_to_pba = NULL;
665 info->pba_to_lba = NULL;
666 kfree(buffer);
667 return -1;
668 }
669
670 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
671 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
672
673 /* set maximum lba */
674 max_lba = info->max_log_blks;
675 if (max_lba > 1000)
676 max_lba = 1000;
677
678 // Each block is 64 bytes of control data, so block i is located in
679 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
680
681 for (i=0; i<numblocks; i++) {
682 int zone = i / 1024;
683
684 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
685
686 /* Every 1024 physical blocks ("zone"), the LBA numbers
687 * go back to zero, but are within a higher
688 * block of LBA's. Also, there is a maximum of
689 * 1000 LBA's per zone. In other words, in PBA
690 * 1024-2047 you will find LBA 0-999 which are
691 * really LBA 1000-1999. Yes, this wastes 24
692 * physical blocks per zone. Go figure.
693 * These devices can have blocks go bad, so there
694 * are 24 spare blocks to use when blocks do go bad.
695 */
696
697 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the
698 * CIS block. (Is this true for cards 8MB or less??)
699 * Record these in the physical to logical map
700 */
701
702 info->pba_to_lba[i] = lba;
703
704 if (lba >= max_lba) {
705 continue;
706 }
707
708 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
709 !info->force_read_only) {
710 printk("sddr55: map inconsistency at LBA %04X\n", lba + zone * 1000);
711 info->force_read_only = 1;
712 }
713
714 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
715 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i);
716
717 info->lba_to_pba[lba + zone * 1000] = i;
718 }
719
720 kfree(buffer);
721 return 0;
722}
723
724
725static void sddr55_card_info_destructor(void *extra) {
726 struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
727
728 if (!extra)
729 return;
730
731 if (info->lba_to_pba)
732 kfree(info->lba_to_pba);
733 if (info->pba_to_lba)
734 kfree(info->pba_to_lba);
735}
736
737
738/*
739 * Transport for the Sandisk SDDR-55
740 */
741int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
742{
743 int result;
744 static unsigned char inquiry_response[8] = {
745 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
746 };
747 // write-protected for now, no block descriptor support
748 static unsigned char mode_page_01[20] = {
749 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
750 0x01, 0x0A,
751 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
752 };
753 unsigned char *ptr = us->iobuf;
754 unsigned long capacity;
755 unsigned int lba;
756 unsigned int pba;
757 unsigned int page;
758 unsigned short pages;
759 struct sddr55_card_info *info;
760
761 if (!us->extra) {
762 us->extra = kmalloc(
763 sizeof(struct sddr55_card_info), GFP_NOIO);
764 if (!us->extra)
765 return USB_STOR_TRANSPORT_ERROR;
766 memset(us->extra, 0, sizeof(struct sddr55_card_info));
767 us->extra_destructor = sddr55_card_info_destructor;
768 }
769
770 info = (struct sddr55_card_info *)(us->extra);
771
772 if (srb->cmnd[0] == REQUEST_SENSE) {
773 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]);
774
775 memcpy (ptr, info->sense_data, sizeof info->sense_data);
776 ptr[0] = 0x70;
777 ptr[7] = 11;
778 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
779 memset (info->sense_data, 0, sizeof info->sense_data);
780
781 return USB_STOR_TRANSPORT_GOOD;
782 }
783
784 memset (info->sense_data, 0, sizeof info->sense_data);
785
786 /* Dummy up a response for INQUIRY since SDDR55 doesn't
787 respond to INQUIRY commands */
788
789 if (srb->cmnd[0] == INQUIRY) {
790 memcpy(ptr, inquiry_response, 8);
791 fill_inquiry_response(us, ptr, 36);
792 return USB_STOR_TRANSPORT_GOOD;
793 }
794
795 /* only check card status if the map isn't allocated, ie no card seen yet
796 * or if it's been over half a second since we last accessed it
797 */
798 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
799
800 /* check to see if a card is fitted */
801 result = sddr55_status (us);
802 if (result) {
803 result = sddr55_status (us);
804 if (!result) {
805 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */
806 }
807 return USB_STOR_TRANSPORT_FAILED;
808 }
809 }
810
811 /* if we detected a problem with the map when writing,
812 don't allow any more access */
813 if (info->fatal_error) {
814
815 set_sense_info (3, 0x31, 0);
816 return USB_STOR_TRANSPORT_FAILED;
817 }
818
819 if (srb->cmnd[0] == READ_CAPACITY) {
820
821 capacity = sddr55_get_capacity(us);
822
823 if (!capacity) {
824 set_sense_info (3, 0x30, 0); /* incompatible medium */
825 return USB_STOR_TRANSPORT_FAILED;
826 }
827
828 info->capacity = capacity;
829
830 /* figure out the maximum logical block number, allowing for
831 * the fact that only 250 out of every 256 are used */
832 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
833
834 /* Last page in the card, adjust as we only use 250 out of
835 * every 256 pages */
836 capacity = (capacity / 256) * 250;
837
838 capacity /= PAGESIZE;
839 capacity--;
840
841 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
842 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
843 usb_stor_set_xfer_buf(ptr, 8, srb);
844
845 sddr55_read_map(us);
846
847 return USB_STOR_TRANSPORT_GOOD;
848 }
849
850 if (srb->cmnd[0] == MODE_SENSE_10) {
851
852 memcpy(ptr, mode_page_01, sizeof mode_page_01);
853 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
854 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
855
856 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
857 US_DEBUGP(
858 "SDDR55: Dummy up request for mode page 1\n");
859 return USB_STOR_TRANSPORT_GOOD;
860
861 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
862 US_DEBUGP(
863 "SDDR55: Dummy up request for all mode pages\n");
864 return USB_STOR_TRANSPORT_GOOD;
865 }
866
867 set_sense_info (5, 0x24, 0); /* invalid field in command */
868 return USB_STOR_TRANSPORT_FAILED;
869 }
870
871 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
872
873 US_DEBUGP(
874 "SDDR55: %s medium removal. Not that I can do"
875 " anything about it...\n",
876 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
877
878 return USB_STOR_TRANSPORT_GOOD;
879
880 }
881
882 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
883
884 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
885 page <<= 16;
886 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
887 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
888
889 page <<= info->smallpageshift;
890
891 // convert page to block and page-within-block
892
893 lba = page >> info->blockshift;
894 page = page & info->blockmask;
895
896 // locate physical block corresponding to logical block
897
898 if (lba >= info->max_log_blks) {
899
900 US_DEBUGP("Error: Requested LBA %04X exceeds maximum "
901 "block %04X\n", lba, info->max_log_blks-1);
902
903 set_sense_info (5, 0x24, 0); /* invalid field in command */
904
905 return USB_STOR_TRANSPORT_FAILED;
906 }
907
908 pba = info->lba_to_pba[lba];
909
910 if (srb->cmnd[0] == WRITE_10) {
911 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X"
912 " pages %d\n",
913 pba, lba, page, pages);
914
915 return sddr55_write_data(us, lba, page, pages);
916 } else {
917 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
918 " pages %d\n",
919 pba, lba, page, pages);
920
921 return sddr55_read_data(us, lba, page, pages);
922 }
923 }
924
925
926 if (srb->cmnd[0] == TEST_UNIT_READY) {
927 return USB_STOR_TRANSPORT_GOOD;
928 }
929
930 if (srb->cmnd[0] == START_STOP) {
931 return USB_STOR_TRANSPORT_GOOD;
932 }
933
934 set_sense_info (5, 0x20, 0); /* illegal command */
935
936 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
937}
938
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 00:49:29 -0500