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1/* Driver for Datafab USB Compact Flash reader
2 *
3 * datafab driver v0.1:
4 *
5 * First release
6 *
7 * Current development and maintenance by:
8 * (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org)
9 *
10 * Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
11 * which I used as a template for this driver.
12 *
13 * Some bugfixes and scatter-gather code by Gregory P. Smith
14 * (greg-usb@electricrain.com)
15 *
16 * Fix for media change by Joerg Schneider (js@joergschneider.com)
17 *
18 * Other contributors:
19 * (c) 2002 Alan Stern <stern@rowland.org>
20 *
21 * This program is free software; you can redistribute it and/or modify it
22 * under the terms of the GNU General Public License as published by the
23 * Free Software Foundation; either version 2, or (at your option) any
24 * later version.
25 *
26 * This program is distributed in the hope that it will be useful, but
27 * WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * General Public License for more details.
30 *
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 */
35
36/*
37 * This driver attempts to support USB CompactFlash reader/writer devices
38 * based on Datafab USB-to-ATA chips. It was specifically developed for the
39 * Datafab MDCFE-B USB CompactFlash reader but has since been found to work
40 * with a variety of Datafab-based devices from a number of manufacturers.
41 * I've received a report of this driver working with a Datafab-based
42 * SmartMedia device though please be aware that I'm personally unable to
43 * test SmartMedia support.
44 *
45 * This driver supports reading and writing. If you're truly paranoid,
46 * however, you can force the driver into a write-protected state by setting
47 * the WP enable bits in datafab_handle_mode_sense(). See the comments
48 * in that routine.
49 */
50
51#include <linux/errno.h>
52#include <linux/module.h>
53#include <linux/slab.h>
54
55#include <scsi/scsi.h>
56#include <scsi/scsi_cmnd.h>
57
58#include "usb.h"
59#include "transport.h"
60#include "protocol.h"
61#include "debug.h"
62
63MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
64MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
65MODULE_LICENSE("GPL");
66
67struct datafab_info {
68 unsigned long sectors; /* total sector count */
69 unsigned long ssize; /* sector size in bytes */
70 signed char lun; /* used for dual-slot readers */
71
72 /* the following aren't used yet */
73 unsigned char sense_key;
74 unsigned long sense_asc; /* additional sense code */
75 unsigned long sense_ascq; /* additional sense code qualifier */
76};
77
78static int datafab_determine_lun(struct us_data *us,
79 struct datafab_info *info);
80
81
82/*
83 * The table of devices
84 */
85#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
86 vendorName, productName, useProtocol, useTransport, \
87 initFunction, flags) \
88{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
89 .driver_info = (flags) }
90
91static struct usb_device_id datafab_usb_ids[] = {
92# include "unusual_datafab.h"
93 { } /* Terminating entry */
94};
95MODULE_DEVICE_TABLE(usb, datafab_usb_ids);
96
97#undef UNUSUAL_DEV
98
99/*
100 * The flags table
101 */
102#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
103 vendor_name, product_name, use_protocol, use_transport, \
104 init_function, Flags) \
105{ \
106 .vendorName = vendor_name, \
107 .productName = product_name, \
108 .useProtocol = use_protocol, \
109 .useTransport = use_transport, \
110 .initFunction = init_function, \
111}
112
113static struct us_unusual_dev datafab_unusual_dev_list[] = {
114# include "unusual_datafab.h"
115 { } /* Terminating entry */
116};
117
118#undef UNUSUAL_DEV
119
120
121static inline int
122datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
123 if (len == 0)
124 return USB_STOR_XFER_GOOD;
125
126 usb_stor_dbg(us, "len = %d\n", len);
127 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
128 data, len, NULL);
129}
130
131
132static inline int
133datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
134 if (len == 0)
135 return USB_STOR_XFER_GOOD;
136
137 usb_stor_dbg(us, "len = %d\n", len);
138 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
139 data, len, NULL);
140}
141
142
143static int datafab_read_data(struct us_data *us,
144 struct datafab_info *info,
145 u32 sector,
146 u32 sectors)
147{
148 unsigned char *command = us->iobuf;
149 unsigned char *buffer;
150 unsigned char thistime;
151 unsigned int totallen, alloclen;
152 int len, result;
153 unsigned int sg_offset = 0;
154 struct scatterlist *sg = NULL;
155
156 // we're working in LBA mode. according to the ATA spec,
157 // we can support up to 28-bit addressing. I don't know if Datafab
158 // supports beyond 24-bit addressing. It's kind of hard to test
159 // since it requires > 8GB CF card.
160 //
161 if (sectors > 0x0FFFFFFF)
162 return USB_STOR_TRANSPORT_ERROR;
163
164 if (info->lun == -1) {
165 result = datafab_determine_lun(us, info);
166 if (result != USB_STOR_TRANSPORT_GOOD)
167 return result;
168 }
169
170 totallen = sectors * info->ssize;
171
172 // Since we don't read more than 64 KB at a time, we have to create
173 // a bounce buffer and move the data a piece at a time between the
174 // bounce buffer and the actual transfer buffer.
175
176 alloclen = min(totallen, 65536u);
177 buffer = kmalloc(alloclen, GFP_NOIO);
178 if (buffer == NULL)
179 return USB_STOR_TRANSPORT_ERROR;
180
181 do {
182 // loop, never allocate or transfer more than 64k at once
183 // (min(128k, 255*info->ssize) is the real limit)
184
185 len = min(totallen, alloclen);
186 thistime = (len / info->ssize) & 0xff;
187
188 command[0] = 0;
189 command[1] = thistime;
190 command[2] = sector & 0xFF;
191 command[3] = (sector >> 8) & 0xFF;
192 command[4] = (sector >> 16) & 0xFF;
193
194 command[5] = 0xE0 + (info->lun << 4);
195 command[5] |= (sector >> 24) & 0x0F;
196 command[6] = 0x20;
197 command[7] = 0x01;
198
199 // send the read command
200 result = datafab_bulk_write(us, command, 8);
201 if (result != USB_STOR_XFER_GOOD)
202 goto leave;
203
204 // read the result
205 result = datafab_bulk_read(us, buffer, len);
206 if (result != USB_STOR_XFER_GOOD)
207 goto leave;
208
209 // Store the data in the transfer buffer
210 usb_stor_access_xfer_buf(buffer, len, us->srb,
211 &sg, &sg_offset, TO_XFER_BUF);
212
213 sector += thistime;
214 totallen -= len;
215 } while (totallen > 0);
216
217 kfree(buffer);
218 return USB_STOR_TRANSPORT_GOOD;
219
220 leave:
221 kfree(buffer);
222 return USB_STOR_TRANSPORT_ERROR;
223}
224
225
226static int datafab_write_data(struct us_data *us,
227 struct datafab_info *info,
228 u32 sector,
229 u32 sectors)
230{
231 unsigned char *command = us->iobuf;
232 unsigned char *reply = us->iobuf;
233 unsigned char *buffer;
234 unsigned char thistime;
235 unsigned int totallen, alloclen;
236 int len, result;
237 unsigned int sg_offset = 0;
238 struct scatterlist *sg = NULL;
239
240 // we're working in LBA mode. according to the ATA spec,
241 // we can support up to 28-bit addressing. I don't know if Datafab
242 // supports beyond 24-bit addressing. It's kind of hard to test
243 // since it requires > 8GB CF card.
244 //
245 if (sectors > 0x0FFFFFFF)
246 return USB_STOR_TRANSPORT_ERROR;
247
248 if (info->lun == -1) {
249 result = datafab_determine_lun(us, info);
250 if (result != USB_STOR_TRANSPORT_GOOD)
251 return result;
252 }
253
254 totallen = sectors * info->ssize;
255
256 // Since we don't write more than 64 KB at a time, we have to create
257 // a bounce buffer and move the data a piece at a time between the
258 // bounce buffer and the actual transfer buffer.
259
260 alloclen = min(totallen, 65536u);
261 buffer = kmalloc(alloclen, GFP_NOIO);
262 if (buffer == NULL)
263 return USB_STOR_TRANSPORT_ERROR;
264
265 do {
266 // loop, never allocate or transfer more than 64k at once
267 // (min(128k, 255*info->ssize) is the real limit)
268
269 len = min(totallen, alloclen);
270 thistime = (len / info->ssize) & 0xff;
271
272 // Get the data from the transfer buffer
273 usb_stor_access_xfer_buf(buffer, len, us->srb,
274 &sg, &sg_offset, FROM_XFER_BUF);
275
276 command[0] = 0;
277 command[1] = thistime;
278 command[2] = sector & 0xFF;
279 command[3] = (sector >> 8) & 0xFF;
280 command[4] = (sector >> 16) & 0xFF;
281
282 command[5] = 0xE0 + (info->lun << 4);
283 command[5] |= (sector >> 24) & 0x0F;
284 command[6] = 0x30;
285 command[7] = 0x02;
286
287 // send the command
288 result = datafab_bulk_write(us, command, 8);
289 if (result != USB_STOR_XFER_GOOD)
290 goto leave;
291
292 // send the data
293 result = datafab_bulk_write(us, buffer, len);
294 if (result != USB_STOR_XFER_GOOD)
295 goto leave;
296
297 // read the result
298 result = datafab_bulk_read(us, reply, 2);
299 if (result != USB_STOR_XFER_GOOD)
300 goto leave;
301
302 if (reply[0] != 0x50 && reply[1] != 0) {
303 usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
304 reply[0], reply[1]);
305 result = USB_STOR_TRANSPORT_ERROR;
306 goto leave;
307 }
308
309 sector += thistime;
310 totallen -= len;
311 } while (totallen > 0);
312
313 kfree(buffer);
314 return USB_STOR_TRANSPORT_GOOD;
315
316 leave:
317 kfree(buffer);
318 return USB_STOR_TRANSPORT_ERROR;
319}
320
321
322static int datafab_determine_lun(struct us_data *us,
323 struct datafab_info *info)
324{
325 // Dual-slot readers can be thought of as dual-LUN devices.
326 // We need to determine which card slot is being used.
327 // We'll send an IDENTIFY DEVICE command and see which LUN responds...
328 //
329 // There might be a better way of doing this?
330
331 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
332 unsigned char *command = us->iobuf;
333 unsigned char *buf;
334 int count = 0, rc;
335
336 if (!info)
337 return USB_STOR_TRANSPORT_ERROR;
338
339 memcpy(command, scommand, 8);
340 buf = kmalloc(512, GFP_NOIO);
341 if (!buf)
342 return USB_STOR_TRANSPORT_ERROR;
343
344 usb_stor_dbg(us, "locating...\n");
345
346 // we'll try 3 times before giving up...
347 //
348 while (count++ < 3) {
349 command[5] = 0xa0;
350
351 rc = datafab_bulk_write(us, command, 8);
352 if (rc != USB_STOR_XFER_GOOD) {
353 rc = USB_STOR_TRANSPORT_ERROR;
354 goto leave;
355 }
356
357 rc = datafab_bulk_read(us, buf, 512);
358 if (rc == USB_STOR_XFER_GOOD) {
359 info->lun = 0;
360 rc = USB_STOR_TRANSPORT_GOOD;
361 goto leave;
362 }
363
364 command[5] = 0xb0;
365
366 rc = datafab_bulk_write(us, command, 8);
367 if (rc != USB_STOR_XFER_GOOD) {
368 rc = USB_STOR_TRANSPORT_ERROR;
369 goto leave;
370 }
371
372 rc = datafab_bulk_read(us, buf, 512);
373 if (rc == USB_STOR_XFER_GOOD) {
374 info->lun = 1;
375 rc = USB_STOR_TRANSPORT_GOOD;
376 goto leave;
377 }
378
379 msleep(20);
380 }
381
382 rc = USB_STOR_TRANSPORT_ERROR;
383
384 leave:
385 kfree(buf);
386 return rc;
387}
388
389static int datafab_id_device(struct us_data *us,
390 struct datafab_info *info)
391{
392 // this is a variation of the ATA "IDENTIFY DEVICE" command...according
393 // to the ATA spec, 'Sector Count' isn't used but the Windows driver
394 // sets this bit so we do too...
395 //
396 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
397 unsigned char *command = us->iobuf;
398 unsigned char *reply;
399 int rc;
400
401 if (!info)
402 return USB_STOR_TRANSPORT_ERROR;
403
404 if (info->lun == -1) {
405 rc = datafab_determine_lun(us, info);
406 if (rc != USB_STOR_TRANSPORT_GOOD)
407 return rc;
408 }
409
410 memcpy(command, scommand, 8);
411 reply = kmalloc(512, GFP_NOIO);
412 if (!reply)
413 return USB_STOR_TRANSPORT_ERROR;
414
415 command[5] += (info->lun << 4);
416
417 rc = datafab_bulk_write(us, command, 8);
418 if (rc != USB_STOR_XFER_GOOD) {
419 rc = USB_STOR_TRANSPORT_ERROR;
420 goto leave;
421 }
422
423 // we'll go ahead and extract the media capacity while we're here...
424 //
425 rc = datafab_bulk_read(us, reply, 512);
426 if (rc == USB_STOR_XFER_GOOD) {
427 // capacity is at word offset 57-58
428 //
429 info->sectors = ((u32)(reply[117]) << 24) |
430 ((u32)(reply[116]) << 16) |
431 ((u32)(reply[115]) << 8) |
432 ((u32)(reply[114]) );
433 rc = USB_STOR_TRANSPORT_GOOD;
434 goto leave;
435 }
436
437 rc = USB_STOR_TRANSPORT_ERROR;
438
439 leave:
440 kfree(reply);
441 return rc;
442}
443
444
445static int datafab_handle_mode_sense(struct us_data *us,
446 struct scsi_cmnd * srb,
447 int sense_6)
448{
449 static unsigned char rw_err_page[12] = {
450 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
451 };
452 static unsigned char cache_page[12] = {
453 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
454 };
455 static unsigned char rbac_page[12] = {
456 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
457 };
458 static unsigned char timer_page[8] = {
459 0x1C, 0x6, 0, 0, 0, 0
460 };
461 unsigned char pc, page_code;
462 unsigned int i = 0;
463 struct datafab_info *info = (struct datafab_info *) (us->extra);
464 unsigned char *ptr = us->iobuf;
465
466 // most of this stuff is just a hack to get things working. the
467 // datafab reader doesn't present a SCSI interface so we
468 // fudge the SCSI commands...
469 //
470
471 pc = srb->cmnd[2] >> 6;
472 page_code = srb->cmnd[2] & 0x3F;
473
474 switch (pc) {
475 case 0x0:
476 usb_stor_dbg(us, "Current values\n");
477 break;
478 case 0x1:
479 usb_stor_dbg(us, "Changeable values\n");
480 break;
481 case 0x2:
482 usb_stor_dbg(us, "Default values\n");
483 break;
484 case 0x3:
485 usb_stor_dbg(us, "Saves values\n");
486 break;
487 }
488
489 memset(ptr, 0, 8);
490 if (sense_6) {
491 ptr[2] = 0x00; // WP enable: 0x80
492 i = 4;
493 } else {
494 ptr[3] = 0x00; // WP enable: 0x80
495 i = 8;
496 }
497
498 switch (page_code) {
499 default:
500 // vendor-specific mode
501 info->sense_key = 0x05;
502 info->sense_asc = 0x24;
503 info->sense_ascq = 0x00;
504 return USB_STOR_TRANSPORT_FAILED;
505
506 case 0x1:
507 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
508 i += sizeof(rw_err_page);
509 break;
510
511 case 0x8:
512 memcpy(ptr + i, cache_page, sizeof(cache_page));
513 i += sizeof(cache_page);
514 break;
515
516 case 0x1B:
517 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
518 i += sizeof(rbac_page);
519 break;
520
521 case 0x1C:
522 memcpy(ptr + i, timer_page, sizeof(timer_page));
523 i += sizeof(timer_page);
524 break;
525
526 case 0x3F: // retrieve all pages
527 memcpy(ptr + i, timer_page, sizeof(timer_page));
528 i += sizeof(timer_page);
529 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
530 i += sizeof(rbac_page);
531 memcpy(ptr + i, cache_page, sizeof(cache_page));
532 i += sizeof(cache_page);
533 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
534 i += sizeof(rw_err_page);
535 break;
536 }
537
538 if (sense_6)
539 ptr[0] = i - 1;
540 else
541 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
542 usb_stor_set_xfer_buf(ptr, i, srb);
543
544 return USB_STOR_TRANSPORT_GOOD;
545}
546
547static void datafab_info_destructor(void *extra)
548{
549 // this routine is a placeholder...
550 // currently, we don't allocate any extra memory so we're okay
551}
552
553
554// Transport for the Datafab MDCFE-B
555//
556static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
557{
558 struct datafab_info *info;
559 int rc;
560 unsigned long block, blocks;
561 unsigned char *ptr = us->iobuf;
562 static unsigned char inquiry_reply[8] = {
563 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
564 };
565
566 if (!us->extra) {
567 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
568 if (!us->extra)
569 return USB_STOR_TRANSPORT_ERROR;
570
571 us->extra_destructor = datafab_info_destructor;
572 ((struct datafab_info *)us->extra)->lun = -1;
573 }
574
575 info = (struct datafab_info *) (us->extra);
576
577 if (srb->cmnd[0] == INQUIRY) {
578 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
579 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
580 fill_inquiry_response(us, ptr, 36);
581 return USB_STOR_TRANSPORT_GOOD;
582 }
583
584 if (srb->cmnd[0] == READ_CAPACITY) {
585 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
586 rc = datafab_id_device(us, info);
587 if (rc != USB_STOR_TRANSPORT_GOOD)
588 return rc;
589
590 usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
591 info->sectors, info->ssize);
592
593 // build the reply
594 // we need the last sector, not the number of sectors
595 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
596 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
597 usb_stor_set_xfer_buf(ptr, 8, srb);
598
599 return USB_STOR_TRANSPORT_GOOD;
600 }
601
602 if (srb->cmnd[0] == MODE_SELECT_10) {
603 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
604 return USB_STOR_TRANSPORT_ERROR;
605 }
606
607 // don't bother implementing READ_6 or WRITE_6.
608 //
609 if (srb->cmnd[0] == READ_10) {
610 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
611 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
612
613 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
614
615 usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n",
616 block, blocks);
617 return datafab_read_data(us, info, block, blocks);
618 }
619
620 if (srb->cmnd[0] == READ_12) {
621 // we'll probably never see a READ_12 but we'll do it anyway...
622 //
623 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
624 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
625
626 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
627 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
628
629 usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n",
630 block, blocks);
631 return datafab_read_data(us, info, block, blocks);
632 }
633
634 if (srb->cmnd[0] == WRITE_10) {
635 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
636 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
637
638 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
639
640 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
641 block, blocks);
642 return datafab_write_data(us, info, block, blocks);
643 }
644
645 if (srb->cmnd[0] == WRITE_12) {
646 // we'll probably never see a WRITE_12 but we'll do it anyway...
647 //
648 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
649 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
650
651 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
652 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
653
654 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
655 block, blocks);
656 return datafab_write_data(us, info, block, blocks);
657 }
658
659 if (srb->cmnd[0] == TEST_UNIT_READY) {
660 usb_stor_dbg(us, "TEST_UNIT_READY\n");
661 return datafab_id_device(us, info);
662 }
663
664 if (srb->cmnd[0] == REQUEST_SENSE) {
665 usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
666
667 // this response is pretty bogus right now. eventually if necessary
668 // we can set the correct sense data. so far though it hasn't been
669 // necessary
670 //
671 memset(ptr, 0, 18);
672 ptr[0] = 0xF0;
673 ptr[2] = info->sense_key;
674 ptr[7] = 11;
675 ptr[12] = info->sense_asc;
676 ptr[13] = info->sense_ascq;
677 usb_stor_set_xfer_buf(ptr, 18, srb);
678
679 return USB_STOR_TRANSPORT_GOOD;
680 }
681
682 if (srb->cmnd[0] == MODE_SENSE) {
683 usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
684 return datafab_handle_mode_sense(us, srb, 1);
685 }
686
687 if (srb->cmnd[0] == MODE_SENSE_10) {
688 usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
689 return datafab_handle_mode_sense(us, srb, 0);
690 }
691
692 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
693 // sure. whatever. not like we can stop the user from
694 // popping the media out of the device (no locking doors, etc)
695 //
696 return USB_STOR_TRANSPORT_GOOD;
697 }
698
699 if (srb->cmnd[0] == START_STOP) {
700 /* this is used by sd.c'check_scsidisk_media_change to detect
701 media change */
702 usb_stor_dbg(us, "START_STOP\n");
703 /* the first datafab_id_device after a media change returns
704 an error (determined experimentally) */
705 rc = datafab_id_device(us, info);
706 if (rc == USB_STOR_TRANSPORT_GOOD) {
707 info->sense_key = NO_SENSE;
708 srb->result = SUCCESS;
709 } else {
710 info->sense_key = UNIT_ATTENTION;
711 srb->result = SAM_STAT_CHECK_CONDITION;
712 }
713 return rc;
714 }
715
716 usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
717 srb->cmnd[0], srb->cmnd[0]);
718 info->sense_key = 0x05;
719 info->sense_asc = 0x20;
720 info->sense_ascq = 0x00;
721 return USB_STOR_TRANSPORT_FAILED;
722}
723
724static int datafab_probe(struct usb_interface *intf,
725 const struct usb_device_id *id)
726{
727 struct us_data *us;
728 int result;
729
730 result = usb_stor_probe1(&us, intf, id,
731 (id - datafab_usb_ids) + datafab_unusual_dev_list);
732 if (result)
733 return result;
734
735 us->transport_name = "Datafab Bulk-Only";
736 us->transport = datafab_transport;
737 us->transport_reset = usb_stor_Bulk_reset;
738 us->max_lun = 1;
739
740 result = usb_stor_probe2(us);
741 return result;
742}
743
744static struct usb_driver datafab_driver = {
745 .name = "ums-datafab",
746 .probe = datafab_probe,
747 .disconnect = usb_stor_disconnect,
748 .suspend = usb_stor_suspend,
749 .resume = usb_stor_resume,
750 .reset_resume = usb_stor_reset_resume,
751 .pre_reset = usb_stor_pre_reset,
752 .post_reset = usb_stor_post_reset,
753 .id_table = datafab_usb_ids,
754 .soft_unbind = 1,
755 .no_dynamic_id = 1,
756};
757
758module_usb_driver(datafab_driver);
1/*
2 * Driver for Datafab USB Compact Flash reader
3 *
4 * datafab driver v0.1:
5 *
6 * First release
7 *
8 * Current development and maintenance by:
9 * (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org)
10 *
11 * Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
12 * which I used as a template for this driver.
13 *
14 * Some bugfixes and scatter-gather code by Gregory P. Smith
15 * (greg-usb@electricrain.com)
16 *
17 * Fix for media change by Joerg Schneider (js@joergschneider.com)
18 *
19 * Other contributors:
20 * (c) 2002 Alan Stern <stern@rowland.org>
21 *
22 * This program is free software; you can redistribute it and/or modify it
23 * under the terms of the GNU General Public License as published by the
24 * Free Software Foundation; either version 2, or (at your option) any
25 * later version.
26 *
27 * This program is distributed in the hope that it will be useful, but
28 * WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
30 * General Public License for more details.
31 *
32 * You should have received a copy of the GNU General Public License along
33 * with this program; if not, write to the Free Software Foundation, Inc.,
34 * 675 Mass Ave, Cambridge, MA 02139, USA.
35 */
36
37/*
38 * This driver attempts to support USB CompactFlash reader/writer devices
39 * based on Datafab USB-to-ATA chips. It was specifically developed for the
40 * Datafab MDCFE-B USB CompactFlash reader but has since been found to work
41 * with a variety of Datafab-based devices from a number of manufacturers.
42 * I've received a report of this driver working with a Datafab-based
43 * SmartMedia device though please be aware that I'm personally unable to
44 * test SmartMedia support.
45 *
46 * This driver supports reading and writing. If you're truly paranoid,
47 * however, you can force the driver into a write-protected state by setting
48 * the WP enable bits in datafab_handle_mode_sense(). See the comments
49 * in that routine.
50 */
51
52#include <linux/errno.h>
53#include <linux/module.h>
54#include <linux/slab.h>
55
56#include <scsi/scsi.h>
57#include <scsi/scsi_cmnd.h>
58
59#include "usb.h"
60#include "transport.h"
61#include "protocol.h"
62#include "debug.h"
63#include "scsiglue.h"
64
65#define DRV_NAME "ums-datafab"
66
67MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
68MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
69MODULE_LICENSE("GPL");
70
71struct datafab_info {
72 unsigned long sectors; /* total sector count */
73 unsigned long ssize; /* sector size in bytes */
74 signed char lun; /* used for dual-slot readers */
75
76 /* the following aren't used yet */
77 unsigned char sense_key;
78 unsigned long sense_asc; /* additional sense code */
79 unsigned long sense_ascq; /* additional sense code qualifier */
80};
81
82static int datafab_determine_lun(struct us_data *us,
83 struct datafab_info *info);
84
85
86/*
87 * The table of devices
88 */
89#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
90 vendorName, productName, useProtocol, useTransport, \
91 initFunction, flags) \
92{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
93 .driver_info = (flags) }
94
95static struct usb_device_id datafab_usb_ids[] = {
96# include "unusual_datafab.h"
97 { } /* Terminating entry */
98};
99MODULE_DEVICE_TABLE(usb, datafab_usb_ids);
100
101#undef UNUSUAL_DEV
102
103/*
104 * The flags table
105 */
106#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
107 vendor_name, product_name, use_protocol, use_transport, \
108 init_function, Flags) \
109{ \
110 .vendorName = vendor_name, \
111 .productName = product_name, \
112 .useProtocol = use_protocol, \
113 .useTransport = use_transport, \
114 .initFunction = init_function, \
115}
116
117static struct us_unusual_dev datafab_unusual_dev_list[] = {
118# include "unusual_datafab.h"
119 { } /* Terminating entry */
120};
121
122#undef UNUSUAL_DEV
123
124
125static inline int
126datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
127 if (len == 0)
128 return USB_STOR_XFER_GOOD;
129
130 usb_stor_dbg(us, "len = %d\n", len);
131 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
132 data, len, NULL);
133}
134
135
136static inline int
137datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
138 if (len == 0)
139 return USB_STOR_XFER_GOOD;
140
141 usb_stor_dbg(us, "len = %d\n", len);
142 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
143 data, len, NULL);
144}
145
146
147static int datafab_read_data(struct us_data *us,
148 struct datafab_info *info,
149 u32 sector,
150 u32 sectors)
151{
152 unsigned char *command = us->iobuf;
153 unsigned char *buffer;
154 unsigned char thistime;
155 unsigned int totallen, alloclen;
156 int len, result;
157 unsigned int sg_offset = 0;
158 struct scatterlist *sg = NULL;
159
160 // we're working in LBA mode. according to the ATA spec,
161 // we can support up to 28-bit addressing. I don't know if Datafab
162 // supports beyond 24-bit addressing. It's kind of hard to test
163 // since it requires > 8GB CF card.
164 //
165 if (sectors > 0x0FFFFFFF)
166 return USB_STOR_TRANSPORT_ERROR;
167
168 if (info->lun == -1) {
169 result = datafab_determine_lun(us, info);
170 if (result != USB_STOR_TRANSPORT_GOOD)
171 return result;
172 }
173
174 totallen = sectors * info->ssize;
175
176 // Since we don't read more than 64 KB at a time, we have to create
177 // a bounce buffer and move the data a piece at a time between the
178 // bounce buffer and the actual transfer buffer.
179
180 alloclen = min(totallen, 65536u);
181 buffer = kmalloc(alloclen, GFP_NOIO);
182 if (buffer == NULL)
183 return USB_STOR_TRANSPORT_ERROR;
184
185 do {
186 // loop, never allocate or transfer more than 64k at once
187 // (min(128k, 255*info->ssize) is the real limit)
188
189 len = min(totallen, alloclen);
190 thistime = (len / info->ssize) & 0xff;
191
192 command[0] = 0;
193 command[1] = thistime;
194 command[2] = sector & 0xFF;
195 command[3] = (sector >> 8) & 0xFF;
196 command[4] = (sector >> 16) & 0xFF;
197
198 command[5] = 0xE0 + (info->lun << 4);
199 command[5] |= (sector >> 24) & 0x0F;
200 command[6] = 0x20;
201 command[7] = 0x01;
202
203 // send the read command
204 result = datafab_bulk_write(us, command, 8);
205 if (result != USB_STOR_XFER_GOOD)
206 goto leave;
207
208 // read the result
209 result = datafab_bulk_read(us, buffer, len);
210 if (result != USB_STOR_XFER_GOOD)
211 goto leave;
212
213 // Store the data in the transfer buffer
214 usb_stor_access_xfer_buf(buffer, len, us->srb,
215 &sg, &sg_offset, TO_XFER_BUF);
216
217 sector += thistime;
218 totallen -= len;
219 } while (totallen > 0);
220
221 kfree(buffer);
222 return USB_STOR_TRANSPORT_GOOD;
223
224 leave:
225 kfree(buffer);
226 return USB_STOR_TRANSPORT_ERROR;
227}
228
229
230static int datafab_write_data(struct us_data *us,
231 struct datafab_info *info,
232 u32 sector,
233 u32 sectors)
234{
235 unsigned char *command = us->iobuf;
236 unsigned char *reply = us->iobuf;
237 unsigned char *buffer;
238 unsigned char thistime;
239 unsigned int totallen, alloclen;
240 int len, result;
241 unsigned int sg_offset = 0;
242 struct scatterlist *sg = NULL;
243
244 // we're working in LBA mode. according to the ATA spec,
245 // we can support up to 28-bit addressing. I don't know if Datafab
246 // supports beyond 24-bit addressing. It's kind of hard to test
247 // since it requires > 8GB CF card.
248 //
249 if (sectors > 0x0FFFFFFF)
250 return USB_STOR_TRANSPORT_ERROR;
251
252 if (info->lun == -1) {
253 result = datafab_determine_lun(us, info);
254 if (result != USB_STOR_TRANSPORT_GOOD)
255 return result;
256 }
257
258 totallen = sectors * info->ssize;
259
260 // Since we don't write more than 64 KB at a time, we have to create
261 // a bounce buffer and move the data a piece at a time between the
262 // bounce buffer and the actual transfer buffer.
263
264 alloclen = min(totallen, 65536u);
265 buffer = kmalloc(alloclen, GFP_NOIO);
266 if (buffer == NULL)
267 return USB_STOR_TRANSPORT_ERROR;
268
269 do {
270 // loop, never allocate or transfer more than 64k at once
271 // (min(128k, 255*info->ssize) is the real limit)
272
273 len = min(totallen, alloclen);
274 thistime = (len / info->ssize) & 0xff;
275
276 // Get the data from the transfer buffer
277 usb_stor_access_xfer_buf(buffer, len, us->srb,
278 &sg, &sg_offset, FROM_XFER_BUF);
279
280 command[0] = 0;
281 command[1] = thistime;
282 command[2] = sector & 0xFF;
283 command[3] = (sector >> 8) & 0xFF;
284 command[4] = (sector >> 16) & 0xFF;
285
286 command[5] = 0xE0 + (info->lun << 4);
287 command[5] |= (sector >> 24) & 0x0F;
288 command[6] = 0x30;
289 command[7] = 0x02;
290
291 // send the command
292 result = datafab_bulk_write(us, command, 8);
293 if (result != USB_STOR_XFER_GOOD)
294 goto leave;
295
296 // send the data
297 result = datafab_bulk_write(us, buffer, len);
298 if (result != USB_STOR_XFER_GOOD)
299 goto leave;
300
301 // read the result
302 result = datafab_bulk_read(us, reply, 2);
303 if (result != USB_STOR_XFER_GOOD)
304 goto leave;
305
306 if (reply[0] != 0x50 && reply[1] != 0) {
307 usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
308 reply[0], reply[1]);
309 result = USB_STOR_TRANSPORT_ERROR;
310 goto leave;
311 }
312
313 sector += thistime;
314 totallen -= len;
315 } while (totallen > 0);
316
317 kfree(buffer);
318 return USB_STOR_TRANSPORT_GOOD;
319
320 leave:
321 kfree(buffer);
322 return USB_STOR_TRANSPORT_ERROR;
323}
324
325
326static int datafab_determine_lun(struct us_data *us,
327 struct datafab_info *info)
328{
329 // Dual-slot readers can be thought of as dual-LUN devices.
330 // We need to determine which card slot is being used.
331 // We'll send an IDENTIFY DEVICE command and see which LUN responds...
332 //
333 // There might be a better way of doing this?
334
335 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
336 unsigned char *command = us->iobuf;
337 unsigned char *buf;
338 int count = 0, rc;
339
340 if (!info)
341 return USB_STOR_TRANSPORT_ERROR;
342
343 memcpy(command, scommand, 8);
344 buf = kmalloc(512, GFP_NOIO);
345 if (!buf)
346 return USB_STOR_TRANSPORT_ERROR;
347
348 usb_stor_dbg(us, "locating...\n");
349
350 // we'll try 3 times before giving up...
351 //
352 while (count++ < 3) {
353 command[5] = 0xa0;
354
355 rc = datafab_bulk_write(us, command, 8);
356 if (rc != USB_STOR_XFER_GOOD) {
357 rc = USB_STOR_TRANSPORT_ERROR;
358 goto leave;
359 }
360
361 rc = datafab_bulk_read(us, buf, 512);
362 if (rc == USB_STOR_XFER_GOOD) {
363 info->lun = 0;
364 rc = USB_STOR_TRANSPORT_GOOD;
365 goto leave;
366 }
367
368 command[5] = 0xb0;
369
370 rc = datafab_bulk_write(us, command, 8);
371 if (rc != USB_STOR_XFER_GOOD) {
372 rc = USB_STOR_TRANSPORT_ERROR;
373 goto leave;
374 }
375
376 rc = datafab_bulk_read(us, buf, 512);
377 if (rc == USB_STOR_XFER_GOOD) {
378 info->lun = 1;
379 rc = USB_STOR_TRANSPORT_GOOD;
380 goto leave;
381 }
382
383 msleep(20);
384 }
385
386 rc = USB_STOR_TRANSPORT_ERROR;
387
388 leave:
389 kfree(buf);
390 return rc;
391}
392
393static int datafab_id_device(struct us_data *us,
394 struct datafab_info *info)
395{
396 // this is a variation of the ATA "IDENTIFY DEVICE" command...according
397 // to the ATA spec, 'Sector Count' isn't used but the Windows driver
398 // sets this bit so we do too...
399 //
400 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
401 unsigned char *command = us->iobuf;
402 unsigned char *reply;
403 int rc;
404
405 if (!info)
406 return USB_STOR_TRANSPORT_ERROR;
407
408 if (info->lun == -1) {
409 rc = datafab_determine_lun(us, info);
410 if (rc != USB_STOR_TRANSPORT_GOOD)
411 return rc;
412 }
413
414 memcpy(command, scommand, 8);
415 reply = kmalloc(512, GFP_NOIO);
416 if (!reply)
417 return USB_STOR_TRANSPORT_ERROR;
418
419 command[5] += (info->lun << 4);
420
421 rc = datafab_bulk_write(us, command, 8);
422 if (rc != USB_STOR_XFER_GOOD) {
423 rc = USB_STOR_TRANSPORT_ERROR;
424 goto leave;
425 }
426
427 // we'll go ahead and extract the media capacity while we're here...
428 //
429 rc = datafab_bulk_read(us, reply, 512);
430 if (rc == USB_STOR_XFER_GOOD) {
431 // capacity is at word offset 57-58
432 //
433 info->sectors = ((u32)(reply[117]) << 24) |
434 ((u32)(reply[116]) << 16) |
435 ((u32)(reply[115]) << 8) |
436 ((u32)(reply[114]) );
437 rc = USB_STOR_TRANSPORT_GOOD;
438 goto leave;
439 }
440
441 rc = USB_STOR_TRANSPORT_ERROR;
442
443 leave:
444 kfree(reply);
445 return rc;
446}
447
448
449static int datafab_handle_mode_sense(struct us_data *us,
450 struct scsi_cmnd * srb,
451 int sense_6)
452{
453 static unsigned char rw_err_page[12] = {
454 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
455 };
456 static unsigned char cache_page[12] = {
457 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
458 };
459 static unsigned char rbac_page[12] = {
460 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
461 };
462 static unsigned char timer_page[8] = {
463 0x1C, 0x6, 0, 0, 0, 0
464 };
465 unsigned char pc, page_code;
466 unsigned int i = 0;
467 struct datafab_info *info = (struct datafab_info *) (us->extra);
468 unsigned char *ptr = us->iobuf;
469
470 // most of this stuff is just a hack to get things working. the
471 // datafab reader doesn't present a SCSI interface so we
472 // fudge the SCSI commands...
473 //
474
475 pc = srb->cmnd[2] >> 6;
476 page_code = srb->cmnd[2] & 0x3F;
477
478 switch (pc) {
479 case 0x0:
480 usb_stor_dbg(us, "Current values\n");
481 break;
482 case 0x1:
483 usb_stor_dbg(us, "Changeable values\n");
484 break;
485 case 0x2:
486 usb_stor_dbg(us, "Default values\n");
487 break;
488 case 0x3:
489 usb_stor_dbg(us, "Saves values\n");
490 break;
491 }
492
493 memset(ptr, 0, 8);
494 if (sense_6) {
495 ptr[2] = 0x00; // WP enable: 0x80
496 i = 4;
497 } else {
498 ptr[3] = 0x00; // WP enable: 0x80
499 i = 8;
500 }
501
502 switch (page_code) {
503 default:
504 // vendor-specific mode
505 info->sense_key = 0x05;
506 info->sense_asc = 0x24;
507 info->sense_ascq = 0x00;
508 return USB_STOR_TRANSPORT_FAILED;
509
510 case 0x1:
511 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
512 i += sizeof(rw_err_page);
513 break;
514
515 case 0x8:
516 memcpy(ptr + i, cache_page, sizeof(cache_page));
517 i += sizeof(cache_page);
518 break;
519
520 case 0x1B:
521 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
522 i += sizeof(rbac_page);
523 break;
524
525 case 0x1C:
526 memcpy(ptr + i, timer_page, sizeof(timer_page));
527 i += sizeof(timer_page);
528 break;
529
530 case 0x3F: // retrieve all pages
531 memcpy(ptr + i, timer_page, sizeof(timer_page));
532 i += sizeof(timer_page);
533 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
534 i += sizeof(rbac_page);
535 memcpy(ptr + i, cache_page, sizeof(cache_page));
536 i += sizeof(cache_page);
537 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
538 i += sizeof(rw_err_page);
539 break;
540 }
541
542 if (sense_6)
543 ptr[0] = i - 1;
544 else
545 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
546 usb_stor_set_xfer_buf(ptr, i, srb);
547
548 return USB_STOR_TRANSPORT_GOOD;
549}
550
551static void datafab_info_destructor(void *extra)
552{
553 // this routine is a placeholder...
554 // currently, we don't allocate any extra memory so we're okay
555}
556
557
558// Transport for the Datafab MDCFE-B
559//
560static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
561{
562 struct datafab_info *info;
563 int rc;
564 unsigned long block, blocks;
565 unsigned char *ptr = us->iobuf;
566 static unsigned char inquiry_reply[8] = {
567 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
568 };
569
570 if (!us->extra) {
571 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
572 if (!us->extra)
573 return USB_STOR_TRANSPORT_ERROR;
574
575 us->extra_destructor = datafab_info_destructor;
576 ((struct datafab_info *)us->extra)->lun = -1;
577 }
578
579 info = (struct datafab_info *) (us->extra);
580
581 if (srb->cmnd[0] == INQUIRY) {
582 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
583 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
584 fill_inquiry_response(us, ptr, 36);
585 return USB_STOR_TRANSPORT_GOOD;
586 }
587
588 if (srb->cmnd[0] == READ_CAPACITY) {
589 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
590 rc = datafab_id_device(us, info);
591 if (rc != USB_STOR_TRANSPORT_GOOD)
592 return rc;
593
594 usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
595 info->sectors, info->ssize);
596
597 // build the reply
598 // we need the last sector, not the number of sectors
599 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
600 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
601 usb_stor_set_xfer_buf(ptr, 8, srb);
602
603 return USB_STOR_TRANSPORT_GOOD;
604 }
605
606 if (srb->cmnd[0] == MODE_SELECT_10) {
607 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
608 return USB_STOR_TRANSPORT_ERROR;
609 }
610
611 // don't bother implementing READ_6 or WRITE_6.
612 //
613 if (srb->cmnd[0] == READ_10) {
614 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
615 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
616
617 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
618
619 usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n",
620 block, blocks);
621 return datafab_read_data(us, info, block, blocks);
622 }
623
624 if (srb->cmnd[0] == READ_12) {
625 // we'll probably never see a READ_12 but we'll do it anyway...
626 //
627 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
628 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
629
630 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
631 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
632
633 usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n",
634 block, blocks);
635 return datafab_read_data(us, info, block, blocks);
636 }
637
638 if (srb->cmnd[0] == WRITE_10) {
639 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
640 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
641
642 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
643
644 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
645 block, blocks);
646 return datafab_write_data(us, info, block, blocks);
647 }
648
649 if (srb->cmnd[0] == WRITE_12) {
650 // we'll probably never see a WRITE_12 but we'll do it anyway...
651 //
652 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
653 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
654
655 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
656 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
657
658 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
659 block, blocks);
660 return datafab_write_data(us, info, block, blocks);
661 }
662
663 if (srb->cmnd[0] == TEST_UNIT_READY) {
664 usb_stor_dbg(us, "TEST_UNIT_READY\n");
665 return datafab_id_device(us, info);
666 }
667
668 if (srb->cmnd[0] == REQUEST_SENSE) {
669 usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
670
671 // this response is pretty bogus right now. eventually if necessary
672 // we can set the correct sense data. so far though it hasn't been
673 // necessary
674 //
675 memset(ptr, 0, 18);
676 ptr[0] = 0xF0;
677 ptr[2] = info->sense_key;
678 ptr[7] = 11;
679 ptr[12] = info->sense_asc;
680 ptr[13] = info->sense_ascq;
681 usb_stor_set_xfer_buf(ptr, 18, srb);
682
683 return USB_STOR_TRANSPORT_GOOD;
684 }
685
686 if (srb->cmnd[0] == MODE_SENSE) {
687 usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
688 return datafab_handle_mode_sense(us, srb, 1);
689 }
690
691 if (srb->cmnd[0] == MODE_SENSE_10) {
692 usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
693 return datafab_handle_mode_sense(us, srb, 0);
694 }
695
696 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
697 /*
698 * sure. whatever. not like we can stop the user from
699 * popping the media out of the device (no locking doors, etc)
700 */
701 return USB_STOR_TRANSPORT_GOOD;
702 }
703
704 if (srb->cmnd[0] == START_STOP) {
705 /*
706 * this is used by sd.c'check_scsidisk_media_change to detect
707 * media change
708 */
709 usb_stor_dbg(us, "START_STOP\n");
710 /*
711 * the first datafab_id_device after a media change returns
712 * an error (determined experimentally)
713 */
714 rc = datafab_id_device(us, info);
715 if (rc == USB_STOR_TRANSPORT_GOOD) {
716 info->sense_key = NO_SENSE;
717 srb->result = SUCCESS;
718 } else {
719 info->sense_key = UNIT_ATTENTION;
720 srb->result = SAM_STAT_CHECK_CONDITION;
721 }
722 return rc;
723 }
724
725 usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
726 srb->cmnd[0], srb->cmnd[0]);
727 info->sense_key = 0x05;
728 info->sense_asc = 0x20;
729 info->sense_ascq = 0x00;
730 return USB_STOR_TRANSPORT_FAILED;
731}
732
733static struct scsi_host_template datafab_host_template;
734
735static int datafab_probe(struct usb_interface *intf,
736 const struct usb_device_id *id)
737{
738 struct us_data *us;
739 int result;
740
741 result = usb_stor_probe1(&us, intf, id,
742 (id - datafab_usb_ids) + datafab_unusual_dev_list,
743 &datafab_host_template);
744 if (result)
745 return result;
746
747 us->transport_name = "Datafab Bulk-Only";
748 us->transport = datafab_transport;
749 us->transport_reset = usb_stor_Bulk_reset;
750 us->max_lun = 1;
751
752 result = usb_stor_probe2(us);
753 return result;
754}
755
756static struct usb_driver datafab_driver = {
757 .name = DRV_NAME,
758 .probe = datafab_probe,
759 .disconnect = usb_stor_disconnect,
760 .suspend = usb_stor_suspend,
761 .resume = usb_stor_resume,
762 .reset_resume = usb_stor_reset_resume,
763 .pre_reset = usb_stor_pre_reset,
764 .post_reset = usb_stor_post_reset,
765 .id_table = datafab_usb_ids,
766 .soft_unbind = 1,
767 .no_dynamic_id = 1,
768};
769
770module_usb_stor_driver(datafab_driver, datafab_host_template, DRV_NAME);