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
63 MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
64 MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
65 MODULE_LICENSE("GPL");
66
67 struct 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
78 static 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)|(USB_US_TYPE_STOR<<24) }
90
91 struct usb_device_id datafab_usb_ids[] = {
92 # include "unusual_datafab.h"
93 { } /* Terminating entry */
94 };
95 MODULE_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
113 static struct us_unusual_dev datafab_unusual_dev_list[] = {
114 # include "unusual_datafab.h"
115 { } /* Terminating entry */
116 };
117
118 #undef UNUSUAL_DEV
119
120
121 static inline int
datafab_bulk_read(struct us_data * us,unsigned char * data,unsigned int len)122 datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
123 if (len == 0)
124 return USB_STOR_XFER_GOOD;
125
126 US_DEBUGP("datafab_bulk_read: len = %d\n", len);
127 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
128 data, len, NULL);
129 }
130
131
132 static inline int
datafab_bulk_write(struct us_data * us,unsigned char * data,unsigned int len)133 datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
134 if (len == 0)
135 return USB_STOR_XFER_GOOD;
136
137 US_DEBUGP("datafab_bulk_write: len = %d\n", len);
138 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
139 data, len, NULL);
140 }
141
142
datafab_read_data(struct us_data * us,struct datafab_info * info,u32 sector,u32 sectors)143 static 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
datafab_write_data(struct us_data * us,struct datafab_info * info,u32 sector,u32 sectors)226 static 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 US_DEBUGP("datafab_write_data: Gah! "
304 "write return code: %02x %02x\n",
305 reply[0], reply[1]);
306 result = USB_STOR_TRANSPORT_ERROR;
307 goto leave;
308 }
309
310 sector += thistime;
311 totallen -= len;
312 } while (totallen > 0);
313
314 kfree(buffer);
315 return USB_STOR_TRANSPORT_GOOD;
316
317 leave:
318 kfree(buffer);
319 return USB_STOR_TRANSPORT_ERROR;
320 }
321
322
datafab_determine_lun(struct us_data * us,struct datafab_info * info)323 static int datafab_determine_lun(struct us_data *us,
324 struct datafab_info *info)
325 {
326 // Dual-slot readers can be thought of as dual-LUN devices.
327 // We need to determine which card slot is being used.
328 // We'll send an IDENTIFY DEVICE command and see which LUN responds...
329 //
330 // There might be a better way of doing this?
331
332 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
333 unsigned char *command = us->iobuf;
334 unsigned char *buf;
335 int count = 0, rc;
336
337 if (!info)
338 return USB_STOR_TRANSPORT_ERROR;
339
340 memcpy(command, scommand, 8);
341 buf = kmalloc(512, GFP_NOIO);
342 if (!buf)
343 return USB_STOR_TRANSPORT_ERROR;
344
345 US_DEBUGP("datafab_determine_lun: locating...\n");
346
347 // we'll try 3 times before giving up...
348 //
349 while (count++ < 3) {
350 command[5] = 0xa0;
351
352 rc = datafab_bulk_write(us, command, 8);
353 if (rc != USB_STOR_XFER_GOOD) {
354 rc = USB_STOR_TRANSPORT_ERROR;
355 goto leave;
356 }
357
358 rc = datafab_bulk_read(us, buf, 512);
359 if (rc == USB_STOR_XFER_GOOD) {
360 info->lun = 0;
361 rc = USB_STOR_TRANSPORT_GOOD;
362 goto leave;
363 }
364
365 command[5] = 0xb0;
366
367 rc = datafab_bulk_write(us, command, 8);
368 if (rc != USB_STOR_XFER_GOOD) {
369 rc = USB_STOR_TRANSPORT_ERROR;
370 goto leave;
371 }
372
373 rc = datafab_bulk_read(us, buf, 512);
374 if (rc == USB_STOR_XFER_GOOD) {
375 info->lun = 1;
376 rc = USB_STOR_TRANSPORT_GOOD;
377 goto leave;
378 }
379
380 msleep(20);
381 }
382
383 rc = USB_STOR_TRANSPORT_ERROR;
384
385 leave:
386 kfree(buf);
387 return rc;
388 }
389
datafab_id_device(struct us_data * us,struct datafab_info * info)390 static int datafab_id_device(struct us_data *us,
391 struct datafab_info *info)
392 {
393 // this is a variation of the ATA "IDENTIFY DEVICE" command...according
394 // to the ATA spec, 'Sector Count' isn't used but the Windows driver
395 // sets this bit so we do too...
396 //
397 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
398 unsigned char *command = us->iobuf;
399 unsigned char *reply;
400 int rc;
401
402 if (!info)
403 return USB_STOR_TRANSPORT_ERROR;
404
405 if (info->lun == -1) {
406 rc = datafab_determine_lun(us, info);
407 if (rc != USB_STOR_TRANSPORT_GOOD)
408 return rc;
409 }
410
411 memcpy(command, scommand, 8);
412 reply = kmalloc(512, GFP_NOIO);
413 if (!reply)
414 return USB_STOR_TRANSPORT_ERROR;
415
416 command[5] += (info->lun << 4);
417
418 rc = datafab_bulk_write(us, command, 8);
419 if (rc != USB_STOR_XFER_GOOD) {
420 rc = USB_STOR_TRANSPORT_ERROR;
421 goto leave;
422 }
423
424 // we'll go ahead and extract the media capacity while we're here...
425 //
426 rc = datafab_bulk_read(us, reply, 512);
427 if (rc == USB_STOR_XFER_GOOD) {
428 // capacity is at word offset 57-58
429 //
430 info->sectors = ((u32)(reply[117]) << 24) |
431 ((u32)(reply[116]) << 16) |
432 ((u32)(reply[115]) << 8) |
433 ((u32)(reply[114]) );
434 rc = USB_STOR_TRANSPORT_GOOD;
435 goto leave;
436 }
437
438 rc = USB_STOR_TRANSPORT_ERROR;
439
440 leave:
441 kfree(reply);
442 return rc;
443 }
444
445
datafab_handle_mode_sense(struct us_data * us,struct scsi_cmnd * srb,int sense_6)446 static int datafab_handle_mode_sense(struct us_data *us,
447 struct scsi_cmnd * srb,
448 int sense_6)
449 {
450 static unsigned char rw_err_page[12] = {
451 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
452 };
453 static unsigned char cache_page[12] = {
454 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
455 };
456 static unsigned char rbac_page[12] = {
457 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
458 };
459 static unsigned char timer_page[8] = {
460 0x1C, 0x6, 0, 0, 0, 0
461 };
462 unsigned char pc, page_code;
463 unsigned int i = 0;
464 struct datafab_info *info = (struct datafab_info *) (us->extra);
465 unsigned char *ptr = us->iobuf;
466
467 // most of this stuff is just a hack to get things working. the
468 // datafab reader doesn't present a SCSI interface so we
469 // fudge the SCSI commands...
470 //
471
472 pc = srb->cmnd[2] >> 6;
473 page_code = srb->cmnd[2] & 0x3F;
474
475 switch (pc) {
476 case 0x0:
477 US_DEBUGP("datafab_handle_mode_sense: Current values\n");
478 break;
479 case 0x1:
480 US_DEBUGP("datafab_handle_mode_sense: Changeable values\n");
481 break;
482 case 0x2:
483 US_DEBUGP("datafab_handle_mode_sense: Default values\n");
484 break;
485 case 0x3:
486 US_DEBUGP("datafab_handle_mode_sense: Saves values\n");
487 break;
488 }
489
490 memset(ptr, 0, 8);
491 if (sense_6) {
492 ptr[2] = 0x00; // WP enable: 0x80
493 i = 4;
494 } else {
495 ptr[3] = 0x00; // WP enable: 0x80
496 i = 8;
497 }
498
499 switch (page_code) {
500 default:
501 // vendor-specific mode
502 info->sense_key = 0x05;
503 info->sense_asc = 0x24;
504 info->sense_ascq = 0x00;
505 return USB_STOR_TRANSPORT_FAILED;
506
507 case 0x1:
508 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
509 i += sizeof(rw_err_page);
510 break;
511
512 case 0x8:
513 memcpy(ptr + i, cache_page, sizeof(cache_page));
514 i += sizeof(cache_page);
515 break;
516
517 case 0x1B:
518 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
519 i += sizeof(rbac_page);
520 break;
521
522 case 0x1C:
523 memcpy(ptr + i, timer_page, sizeof(timer_page));
524 i += sizeof(timer_page);
525 break;
526
527 case 0x3F: // retrieve all pages
528 memcpy(ptr + i, timer_page, sizeof(timer_page));
529 i += sizeof(timer_page);
530 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
531 i += sizeof(rbac_page);
532 memcpy(ptr + i, cache_page, sizeof(cache_page));
533 i += sizeof(cache_page);
534 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
535 i += sizeof(rw_err_page);
536 break;
537 }
538
539 if (sense_6)
540 ptr[0] = i - 1;
541 else
542 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
543 usb_stor_set_xfer_buf(ptr, i, srb);
544
545 return USB_STOR_TRANSPORT_GOOD;
546 }
547
datafab_info_destructor(void * extra)548 static void datafab_info_destructor(void *extra)
549 {
550 // this routine is a placeholder...
551 // currently, we don't allocate any extra memory so we're okay
552 }
553
554
555 // Transport for the Datafab MDCFE-B
556 //
datafab_transport(struct scsi_cmnd * srb,struct us_data * us)557 static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
558 {
559 struct datafab_info *info;
560 int rc;
561 unsigned long block, blocks;
562 unsigned char *ptr = us->iobuf;
563 static unsigned char inquiry_reply[8] = {
564 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
565 };
566
567 if (!us->extra) {
568 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
569 if (!us->extra) {
570 US_DEBUGP("datafab_transport: Gah! "
571 "Can't allocate storage for Datafab info struct!\n");
572 return USB_STOR_TRANSPORT_ERROR;
573 }
574 us->extra_destructor = datafab_info_destructor;
575 ((struct datafab_info *)us->extra)->lun = -1;
576 }
577
578 info = (struct datafab_info *) (us->extra);
579
580 if (srb->cmnd[0] == INQUIRY) {
581 US_DEBUGP("datafab_transport: INQUIRY. Returning bogus response");
582 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
583 fill_inquiry_response(us, ptr, 36);
584 return USB_STOR_TRANSPORT_GOOD;
585 }
586
587 if (srb->cmnd[0] == READ_CAPACITY) {
588 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
589 rc = datafab_id_device(us, info);
590 if (rc != USB_STOR_TRANSPORT_GOOD)
591 return rc;
592
593 US_DEBUGP("datafab_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
594 info->sectors, info->ssize);
595
596 // build the reply
597 // we need the last sector, not the number of sectors
598 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
599 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
600 usb_stor_set_xfer_buf(ptr, 8, srb);
601
602 return USB_STOR_TRANSPORT_GOOD;
603 }
604
605 if (srb->cmnd[0] == MODE_SELECT_10) {
606 US_DEBUGP("datafab_transport: Gah! MODE_SELECT_10.\n");
607 return USB_STOR_TRANSPORT_ERROR;
608 }
609
610 // don't bother implementing READ_6 or WRITE_6.
611 //
612 if (srb->cmnd[0] == READ_10) {
613 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
614 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
615
616 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
617
618 US_DEBUGP("datafab_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
619 return datafab_read_data(us, info, block, blocks);
620 }
621
622 if (srb->cmnd[0] == READ_12) {
623 // we'll probably never see a READ_12 but we'll do it anyway...
624 //
625 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
626 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
627
628 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
629 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
630
631 US_DEBUGP("datafab_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
632 return datafab_read_data(us, info, block, blocks);
633 }
634
635 if (srb->cmnd[0] == WRITE_10) {
636 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
637 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
638
639 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
640
641 US_DEBUGP("datafab_transport: WRITE_10: write block 0x%04lx count %ld\n", 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 US_DEBUGP("datafab_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
655 return datafab_write_data(us, info, block, blocks);
656 }
657
658 if (srb->cmnd[0] == TEST_UNIT_READY) {
659 US_DEBUGP("datafab_transport: TEST_UNIT_READY.\n");
660 return datafab_id_device(us, info);
661 }
662
663 if (srb->cmnd[0] == REQUEST_SENSE) {
664 US_DEBUGP("datafab_transport: REQUEST_SENSE. Returning faked response\n");
665
666 // this response is pretty bogus right now. eventually if necessary
667 // we can set the correct sense data. so far though it hasn't been
668 // necessary
669 //
670 memset(ptr, 0, 18);
671 ptr[0] = 0xF0;
672 ptr[2] = info->sense_key;
673 ptr[7] = 11;
674 ptr[12] = info->sense_asc;
675 ptr[13] = info->sense_ascq;
676 usb_stor_set_xfer_buf(ptr, 18, srb);
677
678 return USB_STOR_TRANSPORT_GOOD;
679 }
680
681 if (srb->cmnd[0] == MODE_SENSE) {
682 US_DEBUGP("datafab_transport: MODE_SENSE_6 detected\n");
683 return datafab_handle_mode_sense(us, srb, 1);
684 }
685
686 if (srb->cmnd[0] == MODE_SENSE_10) {
687 US_DEBUGP("datafab_transport: MODE_SENSE_10 detected\n");
688 return datafab_handle_mode_sense(us, srb, 0);
689 }
690
691 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
692 // sure. whatever. not like we can stop the user from
693 // popping the media out of the device (no locking doors, etc)
694 //
695 return USB_STOR_TRANSPORT_GOOD;
696 }
697
698 if (srb->cmnd[0] == START_STOP) {
699 /* this is used by sd.c'check_scsidisk_media_change to detect
700 media change */
701 US_DEBUGP("datafab_transport: START_STOP.\n");
702 /* the first datafab_id_device after a media change returns
703 an error (determined experimentally) */
704 rc = datafab_id_device(us, info);
705 if (rc == USB_STOR_TRANSPORT_GOOD) {
706 info->sense_key = NO_SENSE;
707 srb->result = SUCCESS;
708 } else {
709 info->sense_key = UNIT_ATTENTION;
710 srb->result = SAM_STAT_CHECK_CONDITION;
711 }
712 return rc;
713 }
714
715 US_DEBUGP("datafab_transport: Gah! Unknown command: %d (0x%x)\n",
716 srb->cmnd[0], srb->cmnd[0]);
717 info->sense_key = 0x05;
718 info->sense_asc = 0x20;
719 info->sense_ascq = 0x00;
720 return USB_STOR_TRANSPORT_FAILED;
721 }
722
datafab_probe(struct usb_interface * intf,const struct usb_device_id * id)723 static int datafab_probe(struct usb_interface *intf,
724 const struct usb_device_id *id)
725 {
726 struct us_data *us;
727 int result;
728
729 result = usb_stor_probe1(&us, intf, id,
730 (id - datafab_usb_ids) + datafab_unusual_dev_list);
731 if (result)
732 return result;
733
734 us->transport_name = "Datafab Bulk-Only";
735 us->transport = datafab_transport;
736 us->transport_reset = usb_stor_Bulk_reset;
737 us->max_lun = 1;
738
739 result = usb_stor_probe2(us);
740 return result;
741 }
742
743 static struct usb_driver datafab_driver = {
744 .name = "ums-datafab",
745 .probe = datafab_probe,
746 .disconnect = usb_stor_disconnect,
747 .suspend = usb_stor_suspend,
748 .resume = usb_stor_resume,
749 .reset_resume = usb_stor_reset_resume,
750 .pre_reset = usb_stor_pre_reset,
751 .post_reset = usb_stor_post_reset,
752 .id_table = datafab_usb_ids,
753 .soft_unbind = 1,
754 };
755
datafab_init(void)756 static int __init datafab_init(void)
757 {
758 return usb_register(&datafab_driver);
759 }
760
datafab_exit(void)761 static void __exit datafab_exit(void)
762 {
763 usb_deregister(&datafab_driver);
764 }
765
766 module_init(datafab_init);
767 module_exit(datafab_exit);
768