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ondemand: Solve a big performance issue by counting IOWAIT time as busy
[linux/fpc-iii.git] / drivers / usb / storage / sddr55.c
blob44dfed7754edb0444763b045229d4f32465812ab
1 /* Driver for SanDisk SDDR-55 SmartMedia reader
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/module.h>
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"
37
38 MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader");
39 MODULE_AUTHOR("Simon Munton");
40 MODULE_LICENSE("GPL");
41
42 /*
43 * The table of devices
44 */
45 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
46 vendorName, productName, useProtocol, useTransport, \
47 initFunction, flags) \
48 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
49 .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
50
51 struct usb_device_id sddr55_usb_ids[] = {
52 # include "unusual_sddr55.h"
53 { } /* Terminating entry */
54 };
55 MODULE_DEVICE_TABLE(usb, sddr55_usb_ids);
56
57 #undef UNUSUAL_DEV
58
59 /*
60 * The flags table
61 */
62 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
63 vendor_name, product_name, use_protocol, use_transport, \
64 init_function, Flags) \
65 { \
66 .vendorName = vendor_name, \
67 .productName = product_name, \
68 .useProtocol = use_protocol, \
69 .useTransport = use_transport, \
70 .initFunction = init_function, \
71 }
72
73 static struct us_unusual_dev sddr55_unusual_dev_list[] = {
74 # include "unusual_sddr55.h"
75 { } /* Terminating entry */
76 };
77
78 #undef UNUSUAL_DEV
79
80
81 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
82 #define LSB_of(s) ((s)&0xFF)
83 #define MSB_of(s) ((s)>>8)
84 #define PAGESIZE 512
85
86 #define set_sense_info(sk, asc, ascq) \
87 do { \
88 info->sense_data[2] = sk; \
89 info->sense_data[12] = asc; \
90 info->sense_data[13] = ascq; \
91 } while (0)
92
93
94 struct sddr55_card_info {
95 unsigned long capacity; /* Size of card in bytes */
96 int max_log_blks; /* maximum number of logical blocks */
97 int pageshift; /* log2 of pagesize */
98 int smallpageshift; /* 1 if pagesize == 256 */
99 int blocksize; /* Size of block in pages */
100 int blockshift; /* log2 of blocksize */
101 int blockmask; /* 2^blockshift - 1 */
102 int read_only; /* non zero if card is write protected */
103 int force_read_only; /* non zero if we find a map error*/
104 int *lba_to_pba; /* logical to physical map */
105 int *pba_to_lba; /* physical to logical map */
106 int fatal_error; /* set if we detect something nasty */
107 unsigned long last_access; /* number of jiffies since we last talked to device */
108 unsigned char sense_data[18];
109 };
110
111
112 #define NOT_ALLOCATED 0xffffffff
113 #define BAD_BLOCK 0xffff
114 #define CIS_BLOCK 0x400
115 #define UNUSED_BLOCK 0x3ff
116
117 static int
118 sddr55_bulk_transport(struct us_data *us, int direction,
119 unsigned char *data, unsigned int len) {
120 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
121 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
122 us->recv_bulk_pipe : us->send_bulk_pipe;
123
124 if (!len)
125 return USB_STOR_XFER_GOOD;
126 info->last_access = jiffies;
127 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
128 }
129
130 /* check if card inserted, if there is, update read_only status
131 * return non zero if no card
132 */
133
134 static int sddr55_status(struct us_data *us)
135 {
136 int result;
137 unsigned char *command = us->iobuf;
138 unsigned char *status = us->iobuf;
139 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
140
141 /* send command */
142 memset(command, 0, 8);
143 command[5] = 0xB0;
144 command[7] = 0x80;
145 result = sddr55_bulk_transport(us,
146 DMA_TO_DEVICE, command, 8);
147
148 US_DEBUGP("Result for send_command in status %d\n",
149 result);
150
151 if (result != USB_STOR_XFER_GOOD) {
152 set_sense_info (4, 0, 0); /* hardware error */
153 return USB_STOR_TRANSPORT_ERROR;
154 }
155
156 result = sddr55_bulk_transport(us,
157 DMA_FROM_DEVICE, status, 4);
158
159 /* expect to get short transfer if no card fitted */
160 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
161 /* had a short transfer, no card inserted, free map memory */
162 kfree(info->lba_to_pba);
163 kfree(info->pba_to_lba);
164 info->lba_to_pba = NULL;
165 info->pba_to_lba = NULL;
166
167 info->fatal_error = 0;
168 info->force_read_only = 0;
169
170 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */
171 return USB_STOR_TRANSPORT_FAILED;
172 }
173
174 if (result != USB_STOR_XFER_GOOD) {
175 set_sense_info (4, 0, 0); /* hardware error */
176 return USB_STOR_TRANSPORT_FAILED;
177 }
178
179 /* check write protect status */
180 info->read_only = (status[0] & 0x20);
181
182 /* now read status */
183 result = sddr55_bulk_transport(us,
184 DMA_FROM_DEVICE, status, 2);
185
186 if (result != USB_STOR_XFER_GOOD) {
187 set_sense_info (4, 0, 0); /* hardware error */
188 }
189
190 return (result == USB_STOR_XFER_GOOD ?
191 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
192 }
193
194
195 static int sddr55_read_data(struct us_data *us,
196 unsigned int lba,
197 unsigned int page,
198 unsigned short sectors) {
199
200 int result = USB_STOR_TRANSPORT_GOOD;
201 unsigned char *command = us->iobuf;
202 unsigned char *status = us->iobuf;
203 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
204 unsigned char *buffer;
205
206 unsigned int pba;
207 unsigned long address;
208
209 unsigned short pages;
210 unsigned int len, offset;
211 struct scatterlist *sg;
212
213 // Since we only read in one block at a time, we have to create
214 // a bounce buffer and move the data a piece at a time between the
215 // bounce buffer and the actual transfer buffer.
216
217 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
218 info->smallpageshift) * PAGESIZE;
219 buffer = kmalloc(len, GFP_NOIO);
220 if (buffer == NULL)
221 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
222 offset = 0;
223 sg = NULL;
224
225 while (sectors>0) {
226
227 /* have we got to end? */
228 if (lba >= info->max_log_blks)
229 break;
230
231 pba = info->lba_to_pba[lba];
232
233 // Read as many sectors as possible in this block
234
235 pages = min((unsigned int) sectors << info->smallpageshift,
236 info->blocksize - page);
237 len = pages << info->pageshift;
238
239 US_DEBUGP("Read %02X pages, from PBA %04X"
240 " (LBA %04X) page %02X\n",
241 pages, pba, lba, page);
242
243 if (pba == NOT_ALLOCATED) {
244 /* no pba for this lba, fill with zeroes */
245 memset (buffer, 0, len);
246 } else {
247
248 address = (pba << info->blockshift) + page;
249
250 command[0] = 0;
251 command[1] = LSB_of(address>>16);
252 command[2] = LSB_of(address>>8);
253 command[3] = LSB_of(address);
254
255 command[4] = 0;
256 command[5] = 0xB0;
257 command[6] = LSB_of(pages << (1 - info->smallpageshift));
258 command[7] = 0x85;
259
260 /* send command */
261 result = sddr55_bulk_transport(us,
262 DMA_TO_DEVICE, command, 8);
263
264 US_DEBUGP("Result for send_command in read_data %d\n",
265 result);
266
267 if (result != USB_STOR_XFER_GOOD) {
268 result = USB_STOR_TRANSPORT_ERROR;
269 goto leave;
270 }
271
272 /* read data */
273 result = sddr55_bulk_transport(us,
274 DMA_FROM_DEVICE, buffer, len);
275
276 if (result != USB_STOR_XFER_GOOD) {
277 result = USB_STOR_TRANSPORT_ERROR;
278 goto leave;
279 }
280
281 /* now read status */
282 result = sddr55_bulk_transport(us,
283 DMA_FROM_DEVICE, status, 2);
284
285 if (result != USB_STOR_XFER_GOOD) {
286 result = USB_STOR_TRANSPORT_ERROR;
287 goto leave;
288 }
289
290 /* check status for error */
291 if (status[0] == 0xff && status[1] == 0x4) {
292 set_sense_info (3, 0x11, 0);
293 result = USB_STOR_TRANSPORT_FAILED;
294 goto leave;
295 }
296 }
297
298 // Store the data in the transfer buffer
299 usb_stor_access_xfer_buf(buffer, len, us->srb,
300 &sg, &offset, TO_XFER_BUF);
301
302 page = 0;
303 lba++;
304 sectors -= pages >> info->smallpageshift;
305 }
306
307 result = USB_STOR_TRANSPORT_GOOD;
308
309 leave:
310 kfree(buffer);
311
312 return result;
313 }
314
315 static int sddr55_write_data(struct us_data *us,
316 unsigned int lba,
317 unsigned int page,
318 unsigned short sectors) {
319
320 int result = USB_STOR_TRANSPORT_GOOD;
321 unsigned char *command = us->iobuf;
322 unsigned char *status = us->iobuf;
323 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
324 unsigned char *buffer;
325
326 unsigned int pba;
327 unsigned int new_pba;
328 unsigned long address;
329
330 unsigned short pages;
331 int i;
332 unsigned int len, offset;
333 struct scatterlist *sg;
334
335 /* check if we are allowed to write */
336 if (info->read_only || info->force_read_only) {
337 set_sense_info (7, 0x27, 0); /* read only */
338 return USB_STOR_TRANSPORT_FAILED;
339 }
340
341 // Since we only write one block at a time, we have to create
342 // a bounce buffer and move the data a piece at a time between the
343 // bounce buffer and the actual transfer buffer.
344
345 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
346 info->smallpageshift) * PAGESIZE;
347 buffer = kmalloc(len, GFP_NOIO);
348 if (buffer == NULL)
349 return USB_STOR_TRANSPORT_ERROR;
350 offset = 0;
351 sg = NULL;
352
353 while (sectors > 0) {
354
355 /* have we got to end? */
356 if (lba >= info->max_log_blks)
357 break;
358
359 pba = info->lba_to_pba[lba];
360
361 // Write as many sectors as possible in this block
362
363 pages = min((unsigned int) sectors << info->smallpageshift,
364 info->blocksize - page);
365 len = pages << info->pageshift;
366
367 // Get the data from the transfer buffer
368 usb_stor_access_xfer_buf(buffer, len, us->srb,
369 &sg, &offset, FROM_XFER_BUF);
370
371 US_DEBUGP("Write %02X pages, to PBA %04X"
372 " (LBA %04X) page %02X\n",
373 pages, pba, lba, page);
374
375 command[4] = 0;
376
377 if (pba == NOT_ALLOCATED) {
378 /* no pba allocated for this lba, find a free pba to use */
379
380 int max_pba = (info->max_log_blks / 250 ) * 256;
381 int found_count = 0;
382 int found_pba = -1;
383
384 /* set pba to first block in zone lba is in */
385 pba = (lba / 1000) * 1024;
386
387 US_DEBUGP("No PBA for LBA %04X\n",lba);
388
389 if (max_pba > 1024)
390 max_pba = 1024;
391
392 /*
393 * Scan through the map looking for an unused block
394 * leave 16 unused blocks at start (or as many as
395 * possible) since the sddr55 seems to reuse a used
396 * block when it shouldn't if we don't leave space.
397 */
398 for (i = 0; i < max_pba; i++, pba++) {
399 if (info->pba_to_lba[pba] == UNUSED_BLOCK) {
400 found_pba = pba;
401 if (found_count++ > 16)
402 break;
403 }
404 }
405
406 pba = found_pba;
407
408 if (pba == -1) {
409 /* oh dear */
410 US_DEBUGP("Couldn't find unallocated block\n");
411
412 set_sense_info (3, 0x31, 0); /* medium error */
413 result = USB_STOR_TRANSPORT_FAILED;
414 goto leave;
415 }
416
417 US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba);
418
419 /* set writing to unallocated block flag */
420 command[4] = 0x40;
421 }
422
423 address = (pba << info->blockshift) + page;
424
425 command[1] = LSB_of(address>>16);
426 command[2] = LSB_of(address>>8);
427 command[3] = LSB_of(address);
428
429 /* set the lba into the command, modulo 1000 */
430 command[0] = LSB_of(lba % 1000);
431 command[6] = MSB_of(lba % 1000);
432
433 command[4] |= LSB_of(pages >> info->smallpageshift);
434 command[5] = 0xB0;
435 command[7] = 0x86;
436
437 /* send command */
438 result = sddr55_bulk_transport(us,
439 DMA_TO_DEVICE, command, 8);
440
441 if (result != USB_STOR_XFER_GOOD) {
442 US_DEBUGP("Result for send_command in write_data %d\n",
443 result);
444
445 /* set_sense_info is superfluous here? */
446 set_sense_info (3, 0x3, 0);/* peripheral write error */
447 result = USB_STOR_TRANSPORT_FAILED;
448 goto leave;
449 }
450
451 /* send the data */
452 result = sddr55_bulk_transport(us,
453 DMA_TO_DEVICE, buffer, len);
454
455 if (result != USB_STOR_XFER_GOOD) {
456 US_DEBUGP("Result for send_data in write_data %d\n",
457 result);
458
459 /* set_sense_info is superfluous here? */
460 set_sense_info (3, 0x3, 0);/* peripheral write error */
461 result = USB_STOR_TRANSPORT_FAILED;
462 goto leave;
463 }
464
465 /* now read status */
466 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
467
468 if (result != USB_STOR_XFER_GOOD) {
469 US_DEBUGP("Result for get_status in write_data %d\n",
470 result);
471
472 /* set_sense_info is superfluous here? */
473 set_sense_info (3, 0x3, 0);/* peripheral write error */
474 result = USB_STOR_TRANSPORT_FAILED;
475 goto leave;
476 }
477
478 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
479 >> info->blockshift;
480
481 /* check status for error */
482 if (status[0] == 0xff && status[1] == 0x4) {
483 info->pba_to_lba[new_pba] = BAD_BLOCK;
484
485 set_sense_info (3, 0x0c, 0);
486 result = USB_STOR_TRANSPORT_FAILED;
487 goto leave;
488 }
489
490 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
491 lba, pba, new_pba);
492
493 /* update the lba<->pba maps, note new_pba might be the same as pba */
494 info->lba_to_pba[lba] = new_pba;
495 info->pba_to_lba[pba] = UNUSED_BLOCK;
496
497 /* check that new_pba wasn't already being used */
498 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
499 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
500 new_pba, info->pba_to_lba[new_pba]);
501 info->fatal_error = 1;
502 set_sense_info (3, 0x31, 0);
503 result = USB_STOR_TRANSPORT_FAILED;
504 goto leave;
505 }
506
507 /* update the pba<->lba maps for new_pba */
508 info->pba_to_lba[new_pba] = lba % 1000;
509
510 page = 0;
511 lba++;
512 sectors -= pages >> info->smallpageshift;
513 }
514 result = USB_STOR_TRANSPORT_GOOD;
515
516 leave:
517 kfree(buffer);
518 return result;
519 }
520
521 static int sddr55_read_deviceID(struct us_data *us,
522 unsigned char *manufacturerID,
523 unsigned char *deviceID) {
524
525 int result;
526 unsigned char *command = us->iobuf;
527 unsigned char *content = us->iobuf;
528
529 memset(command, 0, 8);
530 command[5] = 0xB0;
531 command[7] = 0x84;
532 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
533
534 US_DEBUGP("Result of send_control for device ID is %d\n",
535 result);
536
537 if (result != USB_STOR_XFER_GOOD)
538 return USB_STOR_TRANSPORT_ERROR;
539
540 result = sddr55_bulk_transport(us,
541 DMA_FROM_DEVICE, content, 4);
542
543 if (result != USB_STOR_XFER_GOOD)
544 return USB_STOR_TRANSPORT_ERROR;
545
546 *manufacturerID = content[0];
547 *deviceID = content[1];
548
549 if (content[0] != 0xff) {
550 result = sddr55_bulk_transport(us,
551 DMA_FROM_DEVICE, content, 2);
552 }
553
554 return USB_STOR_TRANSPORT_GOOD;
555 }
556
557
558 static int sddr55_reset(struct us_data *us)
559 {
560 return 0;
561 }
562
563
564 static unsigned long sddr55_get_capacity(struct us_data *us) {
565
566 unsigned char uninitialized_var(manufacturerID);
567 unsigned char uninitialized_var(deviceID);
568 int result;
569 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
570
571 US_DEBUGP("Reading capacity...\n");
572
573 result = sddr55_read_deviceID(us,
574 &manufacturerID,
575 &deviceID);
576
577 US_DEBUGP("Result of read_deviceID is %d\n",
578 result);
579
580 if (result != USB_STOR_XFER_GOOD)
581 return 0;
582
583 US_DEBUGP("Device ID = %02X\n", deviceID);
584 US_DEBUGP("Manuf ID = %02X\n", manufacturerID);
585
586 info->pageshift = 9;
587 info->smallpageshift = 0;
588 info->blocksize = 16;
589 info->blockshift = 4;
590 info->blockmask = 15;
591
592 switch (deviceID) {
593
594 case 0x6e: // 1MB
595 case 0xe8:
596 case 0xec:
597 info->pageshift = 8;
598 info->smallpageshift = 1;
599 return 0x00100000;
600
601 case 0xea: // 2MB
602 case 0x64:
603 info->pageshift = 8;
604 info->smallpageshift = 1;
605 case 0x5d: // 5d is a ROM card with pagesize 512.
606 return 0x00200000;
607
608 case 0xe3: // 4MB
609 case 0xe5:
610 case 0x6b:
611 case 0xd5:
612 return 0x00400000;
613
614 case 0xe6: // 8MB
615 case 0xd6:
616 return 0x00800000;
617
618 case 0x73: // 16MB
619 info->blocksize = 32;
620 info->blockshift = 5;
621 info->blockmask = 31;
622 return 0x01000000;
623
624 case 0x75: // 32MB
625 info->blocksize = 32;
626 info->blockshift = 5;
627 info->blockmask = 31;
628 return 0x02000000;
629
630 case 0x76: // 64MB
631 info->blocksize = 32;
632 info->blockshift = 5;
633 info->blockmask = 31;
634 return 0x04000000;
635
636 case 0x79: // 128MB
637 info->blocksize = 32;
638 info->blockshift = 5;
639 info->blockmask = 31;
640 return 0x08000000;
641
642 default: // unknown
643 return 0;
644
645 }
646 }
647
648 static int sddr55_read_map(struct us_data *us) {
649
650 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra);
651 int numblocks;
652 unsigned char *buffer;
653 unsigned char *command = us->iobuf;
654 int i;
655 unsigned short lba;
656 unsigned short max_lba;
657 int result;
658
659 if (!info->capacity)
660 return -1;
661
662 numblocks = info->capacity >> (info->blockshift + info->pageshift);
663
664 buffer = kmalloc( numblocks * 2, GFP_NOIO );
665
666 if (!buffer)
667 return -1;
668
669 memset(command, 0, 8);
670 command[5] = 0xB0;
671 command[6] = numblocks * 2 / 256;
672 command[7] = 0x8A;
673
674 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
675
676 if ( result != USB_STOR_XFER_GOOD) {
677 kfree (buffer);
678 return -1;
679 }
680
681 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
682
683 if ( result != USB_STOR_XFER_GOOD) {
684 kfree (buffer);
685 return -1;
686 }
687
688 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
689
690 if ( result != USB_STOR_XFER_GOOD) {
691 kfree (buffer);
692 return -1;
693 }
694
695 kfree(info->lba_to_pba);
696 kfree(info->pba_to_lba);
697 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
698 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
699
700 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
701 kfree(info->lba_to_pba);
702 kfree(info->pba_to_lba);
703 info->lba_to_pba = NULL;
704 info->pba_to_lba = NULL;
705 kfree(buffer);
706 return -1;
707 }
708
709 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
710 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
711
712 /* set maximum lba */
713 max_lba = info->max_log_blks;
714 if (max_lba > 1000)
715 max_lba = 1000;
716
717 // Each block is 64 bytes of control data, so block i is located in
718 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
719
720 for (i=0; i<numblocks; i++) {
721 int zone = i / 1024;
722
723 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
724
725 /* Every 1024 physical blocks ("zone"), the LBA numbers
726 * go back to zero, but are within a higher
727 * block of LBA's. Also, there is a maximum of
728 * 1000 LBA's per zone. In other words, in PBA
729 * 1024-2047 you will find LBA 0-999 which are
730 * really LBA 1000-1999. Yes, this wastes 24
731 * physical blocks per zone. Go figure.
732 * These devices can have blocks go bad, so there
733 * are 24 spare blocks to use when blocks do go bad.
734 */
735
736 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the
737 * CIS block. (Is this true for cards 8MB or less??)
738 * Record these in the physical to logical map
739 */
740
741 info->pba_to_lba[i] = lba;
742
743 if (lba >= max_lba) {
744 continue;
745 }
746
747 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
748 !info->force_read_only) {
749 printk(KERN_WARNING
750 "sddr55: map inconsistency at LBA %04X\n",
751 lba + zone * 1000);
752 info->force_read_only = 1;
753 }
754
755 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
756 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i);
757
758 info->lba_to_pba[lba + zone * 1000] = i;
759 }
760
761 kfree(buffer);
762 return 0;
763 }
764
765
766 static void sddr55_card_info_destructor(void *extra) {
767 struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
768
769 if (!extra)
770 return;
771
772 kfree(info->lba_to_pba);
773 kfree(info->pba_to_lba);
774 }
775
776
777 /*
778 * Transport for the Sandisk SDDR-55
779 */
780 static int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
781 {
782 int result;
783 static unsigned char inquiry_response[8] = {
784 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
785 };
786 // write-protected for now, no block descriptor support
787 static unsigned char mode_page_01[20] = {
788 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
789 0x01, 0x0A,
790 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
791 };
792 unsigned char *ptr = us->iobuf;
793 unsigned long capacity;
794 unsigned int lba;
795 unsigned int pba;
796 unsigned int page;
797 unsigned short pages;
798 struct sddr55_card_info *info;
799
800 if (!us->extra) {
801 us->extra = kzalloc(
802 sizeof(struct sddr55_card_info), GFP_NOIO);
803 if (!us->extra)
804 return USB_STOR_TRANSPORT_ERROR;
805 us->extra_destructor = sddr55_card_info_destructor;
806 }
807
808 info = (struct sddr55_card_info *)(us->extra);
809
810 if (srb->cmnd[0] == REQUEST_SENSE) {
811 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]);
812
813 memcpy (ptr, info->sense_data, sizeof info->sense_data);
814 ptr[0] = 0x70;
815 ptr[7] = 11;
816 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
817 memset (info->sense_data, 0, sizeof info->sense_data);
818
819 return USB_STOR_TRANSPORT_GOOD;
820 }
821
822 memset (info->sense_data, 0, sizeof info->sense_data);
823
824 /* Dummy up a response for INQUIRY since SDDR55 doesn't
825 respond to INQUIRY commands */
826
827 if (srb->cmnd[0] == INQUIRY) {
828 memcpy(ptr, inquiry_response, 8);
829 fill_inquiry_response(us, ptr, 36);
830 return USB_STOR_TRANSPORT_GOOD;
831 }
832
833 /* only check card status if the map isn't allocated, ie no card seen yet
834 * or if it's been over half a second since we last accessed it
835 */
836 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
837
838 /* check to see if a card is fitted */
839 result = sddr55_status (us);
840 if (result) {
841 result = sddr55_status (us);
842 if (!result) {
843 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */
844 }
845 return USB_STOR_TRANSPORT_FAILED;
846 }
847 }
848
849 /* if we detected a problem with the map when writing,
850 don't allow any more access */
851 if (info->fatal_error) {
852
853 set_sense_info (3, 0x31, 0);
854 return USB_STOR_TRANSPORT_FAILED;
855 }
856
857 if (srb->cmnd[0] == READ_CAPACITY) {
858
859 capacity = sddr55_get_capacity(us);
860
861 if (!capacity) {
862 set_sense_info (3, 0x30, 0); /* incompatible medium */
863 return USB_STOR_TRANSPORT_FAILED;
864 }
865
866 info->capacity = capacity;
867
868 /* figure out the maximum logical block number, allowing for
869 * the fact that only 250 out of every 256 are used */
870 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
871
872 /* Last page in the card, adjust as we only use 250 out of
873 * every 256 pages */
874 capacity = (capacity / 256) * 250;
875
876 capacity /= PAGESIZE;
877 capacity--;
878
879 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
880 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
881 usb_stor_set_xfer_buf(ptr, 8, srb);
882
883 sddr55_read_map(us);
884
885 return USB_STOR_TRANSPORT_GOOD;
886 }
887
888 if (srb->cmnd[0] == MODE_SENSE_10) {
889
890 memcpy(ptr, mode_page_01, sizeof mode_page_01);
891 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
892 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
893
894 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
895 US_DEBUGP(
896 "SDDR55: Dummy up request for mode page 1\n");
897 return USB_STOR_TRANSPORT_GOOD;
898
899 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
900 US_DEBUGP(
901 "SDDR55: Dummy up request for all mode pages\n");
902 return USB_STOR_TRANSPORT_GOOD;
903 }
904
905 set_sense_info (5, 0x24, 0); /* invalid field in command */
906 return USB_STOR_TRANSPORT_FAILED;
907 }
908
909 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
910
911 US_DEBUGP(
912 "SDDR55: %s medium removal. Not that I can do"
913 " anything about it...\n",
914 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
915
916 return USB_STOR_TRANSPORT_GOOD;
917
918 }
919
920 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
921
922 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
923 page <<= 16;
924 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
925 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
926
927 page <<= info->smallpageshift;
928
929 // convert page to block and page-within-block
930
931 lba = page >> info->blockshift;
932 page = page & info->blockmask;
933
934 // locate physical block corresponding to logical block
935
936 if (lba >= info->max_log_blks) {
937
938 US_DEBUGP("Error: Requested LBA %04X exceeds maximum "
939 "block %04X\n", lba, info->max_log_blks-1);
940
941 set_sense_info (5, 0x24, 0); /* invalid field in command */
942
943 return USB_STOR_TRANSPORT_FAILED;
944 }
945
946 pba = info->lba_to_pba[lba];
947
948 if (srb->cmnd[0] == WRITE_10) {
949 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X"
950 " pages %d\n",
951 pba, lba, page, pages);
952
953 return sddr55_write_data(us, lba, page, pages);
954 } else {
955 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
956 " pages %d\n",
957 pba, lba, page, pages);
958
959 return sddr55_read_data(us, lba, page, pages);
960 }
961 }
962
963
964 if (srb->cmnd[0] == TEST_UNIT_READY) {
965 return USB_STOR_TRANSPORT_GOOD;
966 }
967
968 if (srb->cmnd[0] == START_STOP) {
969 return USB_STOR_TRANSPORT_GOOD;
970 }
971
972 set_sense_info (5, 0x20, 0); /* illegal command */
973
974 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
975 }
976
977
978 static int sddr55_probe(struct usb_interface *intf,
979 const struct usb_device_id *id)
980 {
981 struct us_data *us;
982 int result;
983
984 result = usb_stor_probe1(&us, intf, id,
985 (id - sddr55_usb_ids) + sddr55_unusual_dev_list);
986 if (result)
987 return result;
988
989 us->transport_name = "SDDR55";
990 us->transport = sddr55_transport;
991 us->transport_reset = sddr55_reset;
992 us->max_lun = 0;
993
994 result = usb_stor_probe2(us);
995 return result;
996 }
997
998 static struct usb_driver sddr55_driver = {
999 .name = "ums-sddr55",
1000 .probe = sddr55_probe,
1001 .disconnect = usb_stor_disconnect,
1002 .suspend = usb_stor_suspend,
1003 .resume = usb_stor_resume,
1004 .reset_resume = usb_stor_reset_resume,
1005 .pre_reset = usb_stor_pre_reset,
1006 .post_reset = usb_stor_post_reset,
1007 .id_table = sddr55_usb_ids,
1008 .soft_unbind = 1,
1009 };
1010
1011 static int __init sddr55_init(void)
1012 {
1013 return usb_register(&sddr55_driver);
1014 }
1015
1016 static void __exit sddr55_exit(void)
1017 {
1018 usb_deregister(&sddr55_driver);
1019 }
1020
1021 module_init(sddr55_init);
1022 module_exit(sddr55_exit);
Linux with added FPC-III support