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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / usb / storage / sddr55.c
blobba955d65eb0ebb1c76d8fbc96a734643e822aa27
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Driver for SanDisk SDDR-55 SmartMedia reader
4 *
5 * SDDR55 driver v0.1:
6 *
7 * First release
8 *
9 * Current development and maintenance by:
10 * (c) 2002 Simon Munton
11 */
12
13 #include <linux/jiffies.h>
14 #include <linux/errno.h>
15 #include <linux/module.h>
16 #include <linux/slab.h>
17
18 #include <scsi/scsi.h>
19 #include <scsi/scsi_cmnd.h>
20
21 #include "usb.h"
22 #include "transport.h"
23 #include "protocol.h"
24 #include "debug.h"
25 #include "scsiglue.h"
26
27 #define DRV_NAME "ums-sddr55"
28
29 MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader");
30 MODULE_AUTHOR("Simon Munton");
31 MODULE_LICENSE("GPL");
32 MODULE_IMPORT_NS(USB_STORAGE);
33
34 /*
35 * The table of devices
36 */
37 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
38 vendorName, productName, useProtocol, useTransport, \
39 initFunction, flags) \
40 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
41 .driver_info = (flags) }
42
43 static struct usb_device_id sddr55_usb_ids[] = {
44 # include "unusual_sddr55.h"
45 { } /* Terminating entry */
46 };
47 MODULE_DEVICE_TABLE(usb, sddr55_usb_ids);
48
49 #undef UNUSUAL_DEV
50
51 /*
52 * The flags table
53 */
54 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
55 vendor_name, product_name, use_protocol, use_transport, \
56 init_function, Flags) \
57 { \
58 .vendorName = vendor_name, \
59 .productName = product_name, \
60 .useProtocol = use_protocol, \
61 .useTransport = use_transport, \
62 .initFunction = init_function, \
63 }
64
65 static struct us_unusual_dev sddr55_unusual_dev_list[] = {
66 # include "unusual_sddr55.h"
67 { } /* Terminating entry */
68 };
69
70 #undef UNUSUAL_DEV
71
72
73 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
74 #define LSB_of(s) ((s)&0xFF)
75 #define MSB_of(s) ((s)>>8)
76 #define PAGESIZE 512
77
78 #define set_sense_info(sk, asc, ascq) \
79 do { \
80 info->sense_data[2] = sk; \
81 info->sense_data[12] = asc; \
82 info->sense_data[13] = ascq; \
83 } while (0)
84
85
86 struct sddr55_card_info {
87 unsigned long capacity; /* Size of card in bytes */
88 int max_log_blks; /* maximum number of logical blocks */
89 int pageshift; /* log2 of pagesize */
90 int smallpageshift; /* 1 if pagesize == 256 */
91 int blocksize; /* Size of block in pages */
92 int blockshift; /* log2 of blocksize */
93 int blockmask; /* 2^blockshift - 1 */
94 int read_only; /* non zero if card is write protected */
95 int force_read_only; /* non zero if we find a map error*/
96 int *lba_to_pba; /* logical to physical map */
97 int *pba_to_lba; /* physical to logical map */
98 int fatal_error; /* set if we detect something nasty */
99 unsigned long last_access; /* number of jiffies since we last talked to device */
100 unsigned char sense_data[18];
101 };
102
103
104 #define NOT_ALLOCATED 0xffffffff
105 #define BAD_BLOCK 0xffff
106 #define CIS_BLOCK 0x400
107 #define UNUSED_BLOCK 0x3ff
108
109 static int
110 sddr55_bulk_transport(struct us_data *us, int direction,
111 unsigned char *data, unsigned int len) {
112 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
113 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
114 us->recv_bulk_pipe : us->send_bulk_pipe;
115
116 if (!len)
117 return USB_STOR_XFER_GOOD;
118 info->last_access = jiffies;
119 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
120 }
121
122 /*
123 * check if card inserted, if there is, update read_only status
124 * return non zero if no card
125 */
126
127 static int sddr55_status(struct us_data *us)
128 {
129 int result;
130 unsigned char *command = us->iobuf;
131 unsigned char *status = us->iobuf;
132 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
133
134 /* send command */
135 memset(command, 0, 8);
136 command[5] = 0xB0;
137 command[7] = 0x80;
138 result = sddr55_bulk_transport(us,
139 DMA_TO_DEVICE, command, 8);
140
141 usb_stor_dbg(us, "Result for send_command in status %d\n", result);
142
143 if (result != USB_STOR_XFER_GOOD) {
144 set_sense_info (4, 0, 0); /* hardware error */
145 return USB_STOR_TRANSPORT_ERROR;
146 }
147
148 result = sddr55_bulk_transport(us,
149 DMA_FROM_DEVICE, status, 4);
150
151 /* expect to get short transfer if no card fitted */
152 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
153 /* had a short transfer, no card inserted, free map memory */
154 kfree(info->lba_to_pba);
155 kfree(info->pba_to_lba);
156 info->lba_to_pba = NULL;
157 info->pba_to_lba = NULL;
158
159 info->fatal_error = 0;
160 info->force_read_only = 0;
161
162 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */
163 return USB_STOR_TRANSPORT_FAILED;
164 }
165
166 if (result != USB_STOR_XFER_GOOD) {
167 set_sense_info (4, 0, 0); /* hardware error */
168 return USB_STOR_TRANSPORT_FAILED;
169 }
170
171 /* check write protect status */
172 info->read_only = (status[0] & 0x20);
173
174 /* now read status */
175 result = sddr55_bulk_transport(us,
176 DMA_FROM_DEVICE, status, 2);
177
178 if (result != USB_STOR_XFER_GOOD) {
179 set_sense_info (4, 0, 0); /* hardware error */
180 }
181
182 return (result == USB_STOR_XFER_GOOD ?
183 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
184 }
185
186
187 static int sddr55_read_data(struct us_data *us,
188 unsigned int lba,
189 unsigned int page,
190 unsigned short sectors) {
191
192 int result = USB_STOR_TRANSPORT_GOOD;
193 unsigned char *command = us->iobuf;
194 unsigned char *status = us->iobuf;
195 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
196 unsigned char *buffer;
197
198 unsigned int pba;
199 unsigned long address;
200
201 unsigned short pages;
202 unsigned int len, offset;
203 struct scatterlist *sg;
204
205 // Since we only read in one block at a time, we have to create
206 // a bounce buffer and move the data a piece at a time between the
207 // bounce buffer and the actual transfer buffer.
208
209 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
210 info->smallpageshift) * PAGESIZE;
211 buffer = kmalloc(len, GFP_NOIO);
212 if (buffer == NULL)
213 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
214 offset = 0;
215 sg = NULL;
216
217 while (sectors>0) {
218
219 /* have we got to end? */
220 if (lba >= info->max_log_blks)
221 break;
222
223 pba = info->lba_to_pba[lba];
224
225 // Read as many sectors as possible in this block
226
227 pages = min((unsigned int) sectors << info->smallpageshift,
228 info->blocksize - page);
229 len = pages << info->pageshift;
230
231 usb_stor_dbg(us, "Read %02X pages, from PBA %04X (LBA %04X) page %02X\n",
232 pages, pba, lba, page);
233
234 if (pba == NOT_ALLOCATED) {
235 /* no pba for this lba, fill with zeroes */
236 memset (buffer, 0, len);
237 } else {
238
239 address = (pba << info->blockshift) + page;
240
241 command[0] = 0;
242 command[1] = LSB_of(address>>16);
243 command[2] = LSB_of(address>>8);
244 command[3] = LSB_of(address);
245
246 command[4] = 0;
247 command[5] = 0xB0;
248 command[6] = LSB_of(pages << (1 - info->smallpageshift));
249 command[7] = 0x85;
250
251 /* send command */
252 result = sddr55_bulk_transport(us,
253 DMA_TO_DEVICE, command, 8);
254
255 usb_stor_dbg(us, "Result for send_command in read_data %d\n",
256 result);
257
258 if (result != USB_STOR_XFER_GOOD) {
259 result = USB_STOR_TRANSPORT_ERROR;
260 goto leave;
261 }
262
263 /* read data */
264 result = sddr55_bulk_transport(us,
265 DMA_FROM_DEVICE, buffer, len);
266
267 if (result != USB_STOR_XFER_GOOD) {
268 result = USB_STOR_TRANSPORT_ERROR;
269 goto leave;
270 }
271
272 /* now read status */
273 result = sddr55_bulk_transport(us,
274 DMA_FROM_DEVICE, status, 2);
275
276 if (result != USB_STOR_XFER_GOOD) {
277 result = USB_STOR_TRANSPORT_ERROR;
278 goto leave;
279 }
280
281 /* check status for error */
282 if (status[0] == 0xff && status[1] == 0x4) {
283 set_sense_info (3, 0x11, 0);
284 result = USB_STOR_TRANSPORT_FAILED;
285 goto leave;
286 }
287 }
288
289 // Store the data in the transfer buffer
290 usb_stor_access_xfer_buf(buffer, len, us->srb,
291 &sg, &offset, TO_XFER_BUF);
292
293 page = 0;
294 lba++;
295 sectors -= pages >> info->smallpageshift;
296 }
297
298 result = USB_STOR_TRANSPORT_GOOD;
299
300 leave:
301 kfree(buffer);
302
303 return result;
304 }
305
306 static int sddr55_write_data(struct us_data *us,
307 unsigned int lba,
308 unsigned int page,
309 unsigned short sectors) {
310
311 int result = USB_STOR_TRANSPORT_GOOD;
312 unsigned char *command = us->iobuf;
313 unsigned char *status = us->iobuf;
314 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
315 unsigned char *buffer;
316
317 unsigned int pba;
318 unsigned int new_pba;
319 unsigned long address;
320
321 unsigned short pages;
322 int i;
323 unsigned int len, offset;
324 struct scatterlist *sg;
325
326 /* check if we are allowed to write */
327 if (info->read_only || info->force_read_only) {
328 set_sense_info (7, 0x27, 0); /* read only */
329 return USB_STOR_TRANSPORT_FAILED;
330 }
331
332 // Since we only write one block at a time, we have to create
333 // a bounce buffer and move the data a piece at a time between the
334 // bounce buffer and the actual transfer buffer.
335
336 len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
337 info->smallpageshift) * PAGESIZE;
338 buffer = kmalloc(len, GFP_NOIO);
339 if (buffer == NULL)
340 return USB_STOR_TRANSPORT_ERROR;
341 offset = 0;
342 sg = NULL;
343
344 while (sectors > 0) {
345
346 /* have we got to end? */
347 if (lba >= info->max_log_blks)
348 break;
349
350 pba = info->lba_to_pba[lba];
351
352 // Write as many sectors as possible in this block
353
354 pages = min((unsigned int) sectors << info->smallpageshift,
355 info->blocksize - page);
356 len = pages << info->pageshift;
357
358 // Get the data from the transfer buffer
359 usb_stor_access_xfer_buf(buffer, len, us->srb,
360 &sg, &offset, FROM_XFER_BUF);
361
362 usb_stor_dbg(us, "Write %02X pages, to PBA %04X (LBA %04X) page %02X\n",
363 pages, pba, lba, page);
364
365 command[4] = 0;
366
367 if (pba == NOT_ALLOCATED) {
368 /* no pba allocated for this lba, find a free pba to use */
369
370 int max_pba = (info->max_log_blks / 250 ) * 256;
371 int found_count = 0;
372 int found_pba = -1;
373
374 /* set pba to first block in zone lba is in */
375 pba = (lba / 1000) * 1024;
376
377 usb_stor_dbg(us, "No PBA for LBA %04X\n", lba);
378
379 if (max_pba > 1024)
380 max_pba = 1024;
381
382 /*
383 * Scan through the map looking for an unused block
384 * leave 16 unused blocks at start (or as many as
385 * possible) since the sddr55 seems to reuse a used
386 * block when it shouldn't if we don't leave space.
387 */
388 for (i = 0; i < max_pba; i++, pba++) {
389 if (info->pba_to_lba[pba] == UNUSED_BLOCK) {
390 found_pba = pba;
391 if (found_count++ > 16)
392 break;
393 }
394 }
395
396 pba = found_pba;
397
398 if (pba == -1) {
399 /* oh dear */
400 usb_stor_dbg(us, "Couldn't find unallocated block\n");
401
402 set_sense_info (3, 0x31, 0); /* medium error */
403 result = USB_STOR_TRANSPORT_FAILED;
404 goto leave;
405 }
406
407 usb_stor_dbg(us, "Allocating PBA %04X for LBA %04X\n",
408 pba, lba);
409
410 /* set writing to unallocated block flag */
411 command[4] = 0x40;
412 }
413
414 address = (pba << info->blockshift) + page;
415
416 command[1] = LSB_of(address>>16);
417 command[2] = LSB_of(address>>8);
418 command[3] = LSB_of(address);
419
420 /* set the lba into the command, modulo 1000 */
421 command[0] = LSB_of(lba % 1000);
422 command[6] = MSB_of(lba % 1000);
423
424 command[4] |= LSB_of(pages >> info->smallpageshift);
425 command[5] = 0xB0;
426 command[7] = 0x86;
427
428 /* send command */
429 result = sddr55_bulk_transport(us,
430 DMA_TO_DEVICE, command, 8);
431
432 if (result != USB_STOR_XFER_GOOD) {
433 usb_stor_dbg(us, "Result for send_command in write_data %d\n",
434 result);
435
436 /* set_sense_info is superfluous here? */
437 set_sense_info (3, 0x3, 0);/* peripheral write error */
438 result = USB_STOR_TRANSPORT_FAILED;
439 goto leave;
440 }
441
442 /* send the data */
443 result = sddr55_bulk_transport(us,
444 DMA_TO_DEVICE, buffer, len);
445
446 if (result != USB_STOR_XFER_GOOD) {
447 usb_stor_dbg(us, "Result for send_data in write_data %d\n",
448 result);
449
450 /* set_sense_info is superfluous here? */
451 set_sense_info (3, 0x3, 0);/* peripheral write error */
452 result = USB_STOR_TRANSPORT_FAILED;
453 goto leave;
454 }
455
456 /* now read status */
457 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
458
459 if (result != USB_STOR_XFER_GOOD) {
460 usb_stor_dbg(us, "Result for get_status in write_data %d\n",
461 result);
462
463 /* set_sense_info is superfluous here? */
464 set_sense_info (3, 0x3, 0);/* peripheral write error */
465 result = USB_STOR_TRANSPORT_FAILED;
466 goto leave;
467 }
468
469 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
470 >> info->blockshift;
471
472 /* check status for error */
473 if (status[0] == 0xff && status[1] == 0x4) {
474 info->pba_to_lba[new_pba] = BAD_BLOCK;
475
476 set_sense_info (3, 0x0c, 0);
477 result = USB_STOR_TRANSPORT_FAILED;
478 goto leave;
479 }
480
481 usb_stor_dbg(us, "Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
482 lba, pba, new_pba);
483
484 /* update the lba<->pba maps, note new_pba might be the same as pba */
485 info->lba_to_pba[lba] = new_pba;
486 info->pba_to_lba[pba] = UNUSED_BLOCK;
487
488 /* check that new_pba wasn't already being used */
489 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
490 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
491 new_pba, info->pba_to_lba[new_pba]);
492 info->fatal_error = 1;
493 set_sense_info (3, 0x31, 0);
494 result = USB_STOR_TRANSPORT_FAILED;
495 goto leave;
496 }
497
498 /* update the pba<->lba maps for new_pba */
499 info->pba_to_lba[new_pba] = lba % 1000;
500
501 page = 0;
502 lba++;
503 sectors -= pages >> info->smallpageshift;
504 }
505 result = USB_STOR_TRANSPORT_GOOD;
506
507 leave:
508 kfree(buffer);
509 return result;
510 }
511
512 static int sddr55_read_deviceID(struct us_data *us,
513 unsigned char *manufacturerID,
514 unsigned char *deviceID) {
515
516 int result;
517 unsigned char *command = us->iobuf;
518 unsigned char *content = us->iobuf;
519
520 memset(command, 0, 8);
521 command[5] = 0xB0;
522 command[7] = 0x84;
523 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
524
525 usb_stor_dbg(us, "Result of send_control for device ID is %d\n",
526 result);
527
528 if (result != USB_STOR_XFER_GOOD)
529 return USB_STOR_TRANSPORT_ERROR;
530
531 result = sddr55_bulk_transport(us,
532 DMA_FROM_DEVICE, content, 4);
533
534 if (result != USB_STOR_XFER_GOOD)
535 return USB_STOR_TRANSPORT_ERROR;
536
537 *manufacturerID = content[0];
538 *deviceID = content[1];
539
540 if (content[0] != 0xff) {
541 result = sddr55_bulk_transport(us,
542 DMA_FROM_DEVICE, content, 2);
543 }
544
545 return USB_STOR_TRANSPORT_GOOD;
546 }
547
548
549 static int sddr55_reset(struct us_data *us)
550 {
551 return 0;
552 }
553
554
555 static unsigned long sddr55_get_capacity(struct us_data *us) {
556
557 unsigned char uninitialized_var(manufacturerID);
558 unsigned char uninitialized_var(deviceID);
559 int result;
560 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
561
562 usb_stor_dbg(us, "Reading capacity...\n");
563
564 result = sddr55_read_deviceID(us,
565 &manufacturerID,
566 &deviceID);
567
568 usb_stor_dbg(us, "Result of read_deviceID is %d\n", result);
569
570 if (result != USB_STOR_XFER_GOOD)
571 return 0;
572
573 usb_stor_dbg(us, "Device ID = %02X\n", deviceID);
574 usb_stor_dbg(us, "Manuf ID = %02X\n", manufacturerID);
575
576 info->pageshift = 9;
577 info->smallpageshift = 0;
578 info->blocksize = 16;
579 info->blockshift = 4;
580 info->blockmask = 15;
581
582 switch (deviceID) {
583
584 case 0x6e: // 1MB
585 case 0xe8:
586 case 0xec:
587 info->pageshift = 8;
588 info->smallpageshift = 1;
589 return 0x00100000;
590
591 case 0xea: // 2MB
592 case 0x64:
593 info->pageshift = 8;
594 info->smallpageshift = 1;
595 /* fall through */
596 case 0x5d: // 5d is a ROM card with pagesize 512.
597 return 0x00200000;
598
599 case 0xe3: // 4MB
600 case 0xe5:
601 case 0x6b:
602 case 0xd5:
603 return 0x00400000;
604
605 case 0xe6: // 8MB
606 case 0xd6:
607 return 0x00800000;
608
609 case 0x73: // 16MB
610 info->blocksize = 32;
611 info->blockshift = 5;
612 info->blockmask = 31;
613 return 0x01000000;
614
615 case 0x75: // 32MB
616 info->blocksize = 32;
617 info->blockshift = 5;
618 info->blockmask = 31;
619 return 0x02000000;
620
621 case 0x76: // 64MB
622 info->blocksize = 32;
623 info->blockshift = 5;
624 info->blockmask = 31;
625 return 0x04000000;
626
627 case 0x79: // 128MB
628 info->blocksize = 32;
629 info->blockshift = 5;
630 info->blockmask = 31;
631 return 0x08000000;
632
633 default: // unknown
634 return 0;
635
636 }
637 }
638
639 static int sddr55_read_map(struct us_data *us) {
640
641 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra);
642 int numblocks;
643 unsigned char *buffer;
644 unsigned char *command = us->iobuf;
645 int i;
646 unsigned short lba;
647 unsigned short max_lba;
648 int result;
649
650 if (!info->capacity)
651 return -1;
652
653 numblocks = info->capacity >> (info->blockshift + info->pageshift);
654
655 buffer = kmalloc_array(numblocks, 2, GFP_NOIO );
656
657 if (!buffer)
658 return -1;
659
660 memset(command, 0, 8);
661 command[5] = 0xB0;
662 command[6] = numblocks * 2 / 256;
663 command[7] = 0x8A;
664
665 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
666
667 if ( result != USB_STOR_XFER_GOOD) {
668 kfree (buffer);
669 return -1;
670 }
671
672 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
673
674 if ( result != USB_STOR_XFER_GOOD) {
675 kfree (buffer);
676 return -1;
677 }
678
679 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
680
681 if ( result != USB_STOR_XFER_GOOD) {
682 kfree (buffer);
683 return -1;
684 }
685
686 kfree(info->lba_to_pba);
687 kfree(info->pba_to_lba);
688 info->lba_to_pba = kmalloc_array(numblocks, sizeof(int), GFP_NOIO);
689 info->pba_to_lba = kmalloc_array(numblocks, sizeof(int), GFP_NOIO);
690
691 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
692 kfree(info->lba_to_pba);
693 kfree(info->pba_to_lba);
694 info->lba_to_pba = NULL;
695 info->pba_to_lba = NULL;
696 kfree(buffer);
697 return -1;
698 }
699
700 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
701 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
702
703 /* set maximum lba */
704 max_lba = info->max_log_blks;
705 if (max_lba > 1000)
706 max_lba = 1000;
707
708 /*
709 * Each block is 64 bytes of control data, so block i is located in
710 * scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
711 */
712
713 for (i=0; i<numblocks; i++) {
714 int zone = i / 1024;
715
716 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
717
718 /*
719 * Every 1024 physical blocks ("zone"), the LBA numbers
720 * go back to zero, but are within a higher
721 * block of LBA's. Also, there is a maximum of
722 * 1000 LBA's per zone. In other words, in PBA
723 * 1024-2047 you will find LBA 0-999 which are
724 * really LBA 1000-1999. Yes, this wastes 24
725 * physical blocks per zone. Go figure.
726 * These devices can have blocks go bad, so there
727 * are 24 spare blocks to use when blocks do go bad.
728 */
729
730 /*
731 * SDDR55 returns 0xffff for a bad block, and 0x400 for the
732 * CIS block. (Is this true for cards 8MB or less??)
733 * Record these in the physical to logical map
734 */
735
736 info->pba_to_lba[i] = lba;
737
738 if (lba >= max_lba) {
739 continue;
740 }
741
742 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
743 !info->force_read_only) {
744 printk(KERN_WARNING
745 "sddr55: map inconsistency at LBA %04X\n",
746 lba + zone * 1000);
747 info->force_read_only = 1;
748 }
749
750 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
751 usb_stor_dbg(us, "LBA %04X <-> PBA %04X\n", lba, i);
752
753 info->lba_to_pba[lba + zone * 1000] = i;
754 }
755
756 kfree(buffer);
757 return 0;
758 }
759
760
761 static void sddr55_card_info_destructor(void *extra) {
762 struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
763
764 if (!extra)
765 return;
766
767 kfree(info->lba_to_pba);
768 kfree(info->pba_to_lba);
769 }
770
771
772 /*
773 * Transport for the Sandisk SDDR-55
774 */
775 static int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
776 {
777 int result;
778 static unsigned char inquiry_response[8] = {
779 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
780 };
781 // write-protected for now, no block descriptor support
782 static unsigned char mode_page_01[20] = {
783 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
784 0x01, 0x0A,
785 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
786 };
787 unsigned char *ptr = us->iobuf;
788 unsigned long capacity;
789 unsigned int lba;
790 unsigned int pba;
791 unsigned int page;
792 unsigned short pages;
793 struct sddr55_card_info *info;
794
795 if (!us->extra) {
796 us->extra = kzalloc(
797 sizeof(struct sddr55_card_info), GFP_NOIO);
798 if (!us->extra)
799 return USB_STOR_TRANSPORT_ERROR;
800 us->extra_destructor = sddr55_card_info_destructor;
801 }
802
803 info = (struct sddr55_card_info *)(us->extra);
804
805 if (srb->cmnd[0] == REQUEST_SENSE) {
806 usb_stor_dbg(us, "request sense %02x/%02x/%02x\n",
807 info->sense_data[2],
808 info->sense_data[12],
809 info->sense_data[13]);
810
811 memcpy (ptr, info->sense_data, sizeof info->sense_data);
812 ptr[0] = 0x70;
813 ptr[7] = 11;
814 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
815 memset (info->sense_data, 0, sizeof info->sense_data);
816
817 return USB_STOR_TRANSPORT_GOOD;
818 }
819
820 memset (info->sense_data, 0, sizeof info->sense_data);
821
822 /*
823 * Dummy up a response for INQUIRY since SDDR55 doesn't
824 * respond to INQUIRY commands
825 */
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 /*
834 * only check card status if the map isn't allocated, ie no card seen yet
835 * or if it's been over half a second since we last accessed it
836 */
837 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
838
839 /* check to see if a card is fitted */
840 result = sddr55_status (us);
841 if (result) {
842 result = sddr55_status (us);
843 if (!result) {
844 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */
845 }
846 return USB_STOR_TRANSPORT_FAILED;
847 }
848 }
849
850 /*
851 * if we detected a problem with the map when writing,
852 * don't allow any more access
853 */
854 if (info->fatal_error) {
855
856 set_sense_info (3, 0x31, 0);
857 return USB_STOR_TRANSPORT_FAILED;
858 }
859
860 if (srb->cmnd[0] == READ_CAPACITY) {
861
862 capacity = sddr55_get_capacity(us);
863
864 if (!capacity) {
865 set_sense_info (3, 0x30, 0); /* incompatible medium */
866 return USB_STOR_TRANSPORT_FAILED;
867 }
868
869 info->capacity = capacity;
870
871 /*
872 * figure out the maximum logical block number, allowing for
873 * the fact that only 250 out of every 256 are used
874 */
875 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
876
877 /*
878 * Last page in the card, adjust as we only use 250 out of
879 * every 256 pages
880 */
881 capacity = (capacity / 256) * 250;
882
883 capacity /= PAGESIZE;
884 capacity--;
885
886 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
887 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
888 usb_stor_set_xfer_buf(ptr, 8, srb);
889
890 sddr55_read_map(us);
891
892 return USB_STOR_TRANSPORT_GOOD;
893 }
894
895 if (srb->cmnd[0] == MODE_SENSE_10) {
896
897 memcpy(ptr, mode_page_01, sizeof mode_page_01);
898 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
899 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
900
901 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
902 usb_stor_dbg(us, "Dummy up request for mode page 1\n");
903 return USB_STOR_TRANSPORT_GOOD;
904
905 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
906 usb_stor_dbg(us, "Dummy up request for all mode pages\n");
907 return USB_STOR_TRANSPORT_GOOD;
908 }
909
910 set_sense_info (5, 0x24, 0); /* invalid field in command */
911 return USB_STOR_TRANSPORT_FAILED;
912 }
913
914 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
915
916 usb_stor_dbg(us, "%s medium removal. Not that I can do anything about it...\n",
917 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
918
919 return USB_STOR_TRANSPORT_GOOD;
920
921 }
922
923 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
924
925 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
926 page <<= 16;
927 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
928 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
929
930 page <<= info->smallpageshift;
931
932 // convert page to block and page-within-block
933
934 lba = page >> info->blockshift;
935 page = page & info->blockmask;
936
937 // locate physical block corresponding to logical block
938
939 if (lba >= info->max_log_blks) {
940
941 usb_stor_dbg(us, "Error: Requested LBA %04X exceeds maximum block %04X\n",
942 lba, info->max_log_blks - 1);
943
944 set_sense_info (5, 0x24, 0); /* invalid field in command */
945
946 return USB_STOR_TRANSPORT_FAILED;
947 }
948
949 pba = info->lba_to_pba[lba];
950
951 if (srb->cmnd[0] == WRITE_10) {
952 usb_stor_dbg(us, "WRITE_10: write block %04X (LBA %04X) page %01X pages %d\n",
953 pba, lba, page, pages);
954
955 return sddr55_write_data(us, lba, page, pages);
956 } else {
957 usb_stor_dbg(us, "READ_10: read block %04X (LBA %04X) page %01X pages %d\n",
958 pba, lba, page, pages);
959
960 return sddr55_read_data(us, lba, page, pages);
961 }
962 }
963
964
965 if (srb->cmnd[0] == TEST_UNIT_READY) {
966 return USB_STOR_TRANSPORT_GOOD;
967 }
968
969 if (srb->cmnd[0] == START_STOP) {
970 return USB_STOR_TRANSPORT_GOOD;
971 }
972
973 set_sense_info (5, 0x20, 0); /* illegal command */
974
975 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
976 }
977
978 static struct scsi_host_template sddr55_host_template;
979
980 static int sddr55_probe(struct usb_interface *intf,
981 const struct usb_device_id *id)
982 {
983 struct us_data *us;
984 int result;
985
986 result = usb_stor_probe1(&us, intf, id,
987 (id - sddr55_usb_ids) + sddr55_unusual_dev_list,
988 &sddr55_host_template);
989 if (result)
990 return result;
991
992 us->transport_name = "SDDR55";
993 us->transport = sddr55_transport;
994 us->transport_reset = sddr55_reset;
995 us->max_lun = 0;
996
997 result = usb_stor_probe2(us);
998 return result;
999 }
1000
1001 static struct usb_driver sddr55_driver = {
1002 .name = DRV_NAME,
1003 .probe = sddr55_probe,
1004 .disconnect = usb_stor_disconnect,
1005 .suspend = usb_stor_suspend,
1006 .resume = usb_stor_resume,
1007 .reset_resume = usb_stor_reset_resume,
1008 .pre_reset = usb_stor_pre_reset,
1009 .post_reset = usb_stor_post_reset,
1010 .id_table = sddr55_usb_ids,
1011 .soft_unbind = 1,
1012 .no_dynamic_id = 1,
1013 };
1014
1015 module_usb_stor_driver(sddr55_driver, sddr55_host_template, DRV_NAME);
Linux with added FPC-III support