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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Driver for Datafab USB Compact Flash reader
4 *
5 * datafab driver v0.1:
6 *
7 * First release
8 *
9 * Current development and maintenance by:
10 * (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org)
11 *
12 * Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
13 * which I used as a template for this driver.
14 *
15 * Some bugfixes and scatter-gather code by Gregory P. Smith
16 * (greg-usb@electricrain.com)
17 *
18 * Fix for media change by Joerg Schneider (js@joergschneider.com)
19 *
20 * Other contributors:
21 * (c) 2002 Alan Stern <stern@rowland.org>
22 */
23
24/*
25 * This driver attempts to support USB CompactFlash reader/writer devices
26 * based on Datafab USB-to-ATA chips. It was specifically developed for the
27 * Datafab MDCFE-B USB CompactFlash reader but has since been found to work
28 * with a variety of Datafab-based devices from a number of manufacturers.
29 * I've received a report of this driver working with a Datafab-based
30 * SmartMedia device though please be aware that I'm personally unable to
31 * test SmartMedia support.
32 *
33 * This driver supports reading and writing. If you're truly paranoid,
34 * however, you can force the driver into a write-protected state by setting
35 * the WP enable bits in datafab_handle_mode_sense(). See the comments
36 * in that routine.
37 */
38
39#include <linux/errno.h>
40#include <linux/module.h>
41#include <linux/slab.h>
42
43#include <scsi/scsi.h>
44#include <scsi/scsi_cmnd.h>
45
46#include "usb.h"
47#include "transport.h"
48#include "protocol.h"
49#include "debug.h"
50#include "scsiglue.h"
51
52#define DRV_NAME "ums-datafab"
53
54MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
55MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
56MODULE_LICENSE("GPL");
57MODULE_IMPORT_NS(USB_STORAGE);
58
59struct datafab_info {
60 unsigned long sectors; /* total sector count */
61 unsigned long ssize; /* sector size in bytes */
62 signed char lun; /* used for dual-slot readers */
63
64 /* the following aren't used yet */
65 unsigned char sense_key;
66 unsigned long sense_asc; /* additional sense code */
67 unsigned long sense_ascq; /* additional sense code qualifier */
68};
69
70static int datafab_determine_lun(struct us_data *us,
71 struct datafab_info *info);
72
73
74/*
75 * The table of devices
76 */
77#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
78 vendorName, productName, useProtocol, useTransport, \
79 initFunction, flags) \
80{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
81 .driver_info = (flags) }
82
83static struct usb_device_id datafab_usb_ids[] = {
84# include "unusual_datafab.h"
85 { } /* Terminating entry */
86};
87MODULE_DEVICE_TABLE(usb, datafab_usb_ids);
88
89#undef UNUSUAL_DEV
90
91/*
92 * The flags table
93 */
94#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
95 vendor_name, product_name, use_protocol, use_transport, \
96 init_function, Flags) \
97{ \
98 .vendorName = vendor_name, \
99 .productName = product_name, \
100 .useProtocol = use_protocol, \
101 .useTransport = use_transport, \
102 .initFunction = init_function, \
103}
104
105static struct us_unusual_dev datafab_unusual_dev_list[] = {
106# include "unusual_datafab.h"
107 { } /* Terminating entry */
108};
109
110#undef UNUSUAL_DEV
111
112
113static inline int
114datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
115 if (len == 0)
116 return USB_STOR_XFER_GOOD;
117
118 usb_stor_dbg(us, "len = %d\n", len);
119 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
120 data, len, NULL);
121}
122
123
124static inline int
125datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
126 if (len == 0)
127 return USB_STOR_XFER_GOOD;
128
129 usb_stor_dbg(us, "len = %d\n", len);
130 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
131 data, len, NULL);
132}
133
134
135static int datafab_read_data(struct us_data *us,
136 struct datafab_info *info,
137 u32 sector,
138 u32 sectors)
139{
140 unsigned char *command = us->iobuf;
141 unsigned char *buffer;
142 unsigned char thistime;
143 unsigned int totallen, alloclen;
144 int len, result;
145 unsigned int sg_offset = 0;
146 struct scatterlist *sg = NULL;
147
148 // we're working in LBA mode. according to the ATA spec,
149 // we can support up to 28-bit addressing. I don't know if Datafab
150 // supports beyond 24-bit addressing. It's kind of hard to test
151 // since it requires > 8GB CF card.
152 //
153 if (sectors > 0x0FFFFFFF)
154 return USB_STOR_TRANSPORT_ERROR;
155
156 if (info->lun == -1) {
157 result = datafab_determine_lun(us, info);
158 if (result != USB_STOR_TRANSPORT_GOOD)
159 return result;
160 }
161
162 totallen = sectors * info->ssize;
163
164 // Since we don't read more than 64 KB at a time, we have to create
165 // a bounce buffer and move the data a piece at a time between the
166 // bounce buffer and the actual transfer buffer.
167
168 alloclen = min(totallen, 65536u);
169 buffer = kmalloc(alloclen, GFP_NOIO);
170 if (buffer == NULL)
171 return USB_STOR_TRANSPORT_ERROR;
172
173 do {
174 // loop, never allocate or transfer more than 64k at once
175 // (min(128k, 255*info->ssize) is the real limit)
176
177 len = min(totallen, alloclen);
178 thistime = (len / info->ssize) & 0xff;
179
180 command[0] = 0;
181 command[1] = thistime;
182 command[2] = sector & 0xFF;
183 command[3] = (sector >> 8) & 0xFF;
184 command[4] = (sector >> 16) & 0xFF;
185
186 command[5] = 0xE0 + (info->lun << 4);
187 command[5] |= (sector >> 24) & 0x0F;
188 command[6] = 0x20;
189 command[7] = 0x01;
190
191 // send the read command
192 result = datafab_bulk_write(us, command, 8);
193 if (result != USB_STOR_XFER_GOOD)
194 goto leave;
195
196 // read the result
197 result = datafab_bulk_read(us, buffer, len);
198 if (result != USB_STOR_XFER_GOOD)
199 goto leave;
200
201 // Store the data in the transfer buffer
202 usb_stor_access_xfer_buf(buffer, len, us->srb,
203 &sg, &sg_offset, TO_XFER_BUF);
204
205 sector += thistime;
206 totallen -= len;
207 } while (totallen > 0);
208
209 kfree(buffer);
210 return USB_STOR_TRANSPORT_GOOD;
211
212 leave:
213 kfree(buffer);
214 return USB_STOR_TRANSPORT_ERROR;
215}
216
217
218static int datafab_write_data(struct us_data *us,
219 struct datafab_info *info,
220 u32 sector,
221 u32 sectors)
222{
223 unsigned char *command = us->iobuf;
224 unsigned char *reply = us->iobuf;
225 unsigned char *buffer;
226 unsigned char thistime;
227 unsigned int totallen, alloclen;
228 int len, result;
229 unsigned int sg_offset = 0;
230 struct scatterlist *sg = NULL;
231
232 // we're working in LBA mode. according to the ATA spec,
233 // we can support up to 28-bit addressing. I don't know if Datafab
234 // supports beyond 24-bit addressing. It's kind of hard to test
235 // since it requires > 8GB CF card.
236 //
237 if (sectors > 0x0FFFFFFF)
238 return USB_STOR_TRANSPORT_ERROR;
239
240 if (info->lun == -1) {
241 result = datafab_determine_lun(us, info);
242 if (result != USB_STOR_TRANSPORT_GOOD)
243 return result;
244 }
245
246 totallen = sectors * info->ssize;
247
248 // Since we don't write more than 64 KB at a time, we have to create
249 // a bounce buffer and move the data a piece at a time between the
250 // bounce buffer and the actual transfer buffer.
251
252 alloclen = min(totallen, 65536u);
253 buffer = kmalloc(alloclen, GFP_NOIO);
254 if (buffer == NULL)
255 return USB_STOR_TRANSPORT_ERROR;
256
257 do {
258 // loop, never allocate or transfer more than 64k at once
259 // (min(128k, 255*info->ssize) is the real limit)
260
261 len = min(totallen, alloclen);
262 thistime = (len / info->ssize) & 0xff;
263
264 // Get the data from the transfer buffer
265 usb_stor_access_xfer_buf(buffer, len, us->srb,
266 &sg, &sg_offset, FROM_XFER_BUF);
267
268 command[0] = 0;
269 command[1] = thistime;
270 command[2] = sector & 0xFF;
271 command[3] = (sector >> 8) & 0xFF;
272 command[4] = (sector >> 16) & 0xFF;
273
274 command[5] = 0xE0 + (info->lun << 4);
275 command[5] |= (sector >> 24) & 0x0F;
276 command[6] = 0x30;
277 command[7] = 0x02;
278
279 // send the command
280 result = datafab_bulk_write(us, command, 8);
281 if (result != USB_STOR_XFER_GOOD)
282 goto leave;
283
284 // send the data
285 result = datafab_bulk_write(us, buffer, len);
286 if (result != USB_STOR_XFER_GOOD)
287 goto leave;
288
289 // read the result
290 result = datafab_bulk_read(us, reply, 2);
291 if (result != USB_STOR_XFER_GOOD)
292 goto leave;
293
294 if (reply[0] != 0x50 && reply[1] != 0) {
295 usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
296 reply[0], reply[1]);
297 result = USB_STOR_TRANSPORT_ERROR;
298 goto leave;
299 }
300
301 sector += thistime;
302 totallen -= len;
303 } while (totallen > 0);
304
305 kfree(buffer);
306 return USB_STOR_TRANSPORT_GOOD;
307
308 leave:
309 kfree(buffer);
310 return USB_STOR_TRANSPORT_ERROR;
311}
312
313
314static int datafab_determine_lun(struct us_data *us,
315 struct datafab_info *info)
316{
317 // Dual-slot readers can be thought of as dual-LUN devices.
318 // We need to determine which card slot is being used.
319 // We'll send an IDENTIFY DEVICE command and see which LUN responds...
320 //
321 // There might be a better way of doing this?
322
323 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
324 unsigned char *command = us->iobuf;
325 unsigned char *buf;
326 int count = 0, rc;
327
328 if (!info)
329 return USB_STOR_TRANSPORT_ERROR;
330
331 memcpy(command, scommand, 8);
332 buf = kmalloc(512, GFP_NOIO);
333 if (!buf)
334 return USB_STOR_TRANSPORT_ERROR;
335
336 usb_stor_dbg(us, "locating...\n");
337
338 // we'll try 3 times before giving up...
339 //
340 while (count++ < 3) {
341 command[5] = 0xa0;
342
343 rc = datafab_bulk_write(us, command, 8);
344 if (rc != USB_STOR_XFER_GOOD) {
345 rc = USB_STOR_TRANSPORT_ERROR;
346 goto leave;
347 }
348
349 rc = datafab_bulk_read(us, buf, 512);
350 if (rc == USB_STOR_XFER_GOOD) {
351 info->lun = 0;
352 rc = USB_STOR_TRANSPORT_GOOD;
353 goto leave;
354 }
355
356 command[5] = 0xb0;
357
358 rc = datafab_bulk_write(us, command, 8);
359 if (rc != USB_STOR_XFER_GOOD) {
360 rc = USB_STOR_TRANSPORT_ERROR;
361 goto leave;
362 }
363
364 rc = datafab_bulk_read(us, buf, 512);
365 if (rc == USB_STOR_XFER_GOOD) {
366 info->lun = 1;
367 rc = USB_STOR_TRANSPORT_GOOD;
368 goto leave;
369 }
370
371 msleep(20);
372 }
373
374 rc = USB_STOR_TRANSPORT_ERROR;
375
376 leave:
377 kfree(buf);
378 return rc;
379}
380
381static int datafab_id_device(struct us_data *us,
382 struct datafab_info *info)
383{
384 // this is a variation of the ATA "IDENTIFY DEVICE" command...according
385 // to the ATA spec, 'Sector Count' isn't used but the Windows driver
386 // sets this bit so we do too...
387 //
388 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
389 unsigned char *command = us->iobuf;
390 unsigned char *reply;
391 int rc;
392
393 if (!info)
394 return USB_STOR_TRANSPORT_ERROR;
395
396 if (info->lun == -1) {
397 rc = datafab_determine_lun(us, info);
398 if (rc != USB_STOR_TRANSPORT_GOOD)
399 return rc;
400 }
401
402 memcpy(command, scommand, 8);
403 reply = kmalloc(512, GFP_NOIO);
404 if (!reply)
405 return USB_STOR_TRANSPORT_ERROR;
406
407 command[5] += (info->lun << 4);
408
409 rc = datafab_bulk_write(us, command, 8);
410 if (rc != USB_STOR_XFER_GOOD) {
411 rc = USB_STOR_TRANSPORT_ERROR;
412 goto leave;
413 }
414
415 // we'll go ahead and extract the media capacity while we're here...
416 //
417 rc = datafab_bulk_read(us, reply, 512);
418 if (rc == USB_STOR_XFER_GOOD) {
419 // capacity is at word offset 57-58
420 //
421 info->sectors = ((u32)(reply[117]) << 24) |
422 ((u32)(reply[116]) << 16) |
423 ((u32)(reply[115]) << 8) |
424 ((u32)(reply[114]) );
425 rc = USB_STOR_TRANSPORT_GOOD;
426 goto leave;
427 }
428
429 rc = USB_STOR_TRANSPORT_ERROR;
430
431 leave:
432 kfree(reply);
433 return rc;
434}
435
436
437static int datafab_handle_mode_sense(struct us_data *us,
438 struct scsi_cmnd * srb,
439 int sense_6)
440{
441 static unsigned char rw_err_page[12] = {
442 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
443 };
444 static unsigned char cache_page[12] = {
445 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
446 };
447 static unsigned char rbac_page[12] = {
448 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
449 };
450 static unsigned char timer_page[8] = {
451 0x1C, 0x6, 0, 0, 0, 0
452 };
453 unsigned char pc, page_code;
454 unsigned int i = 0;
455 struct datafab_info *info = (struct datafab_info *) (us->extra);
456 unsigned char *ptr = us->iobuf;
457
458 // most of this stuff is just a hack to get things working. the
459 // datafab reader doesn't present a SCSI interface so we
460 // fudge the SCSI commands...
461 //
462
463 pc = srb->cmnd[2] >> 6;
464 page_code = srb->cmnd[2] & 0x3F;
465
466 switch (pc) {
467 case 0x0:
468 usb_stor_dbg(us, "Current values\n");
469 break;
470 case 0x1:
471 usb_stor_dbg(us, "Changeable values\n");
472 break;
473 case 0x2:
474 usb_stor_dbg(us, "Default values\n");
475 break;
476 case 0x3:
477 usb_stor_dbg(us, "Saves values\n");
478 break;
479 }
480
481 memset(ptr, 0, 8);
482 if (sense_6) {
483 ptr[2] = 0x00; // WP enable: 0x80
484 i = 4;
485 } else {
486 ptr[3] = 0x00; // WP enable: 0x80
487 i = 8;
488 }
489
490 switch (page_code) {
491 default:
492 // vendor-specific mode
493 info->sense_key = 0x05;
494 info->sense_asc = 0x24;
495 info->sense_ascq = 0x00;
496 return USB_STOR_TRANSPORT_FAILED;
497
498 case 0x1:
499 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
500 i += sizeof(rw_err_page);
501 break;
502
503 case 0x8:
504 memcpy(ptr + i, cache_page, sizeof(cache_page));
505 i += sizeof(cache_page);
506 break;
507
508 case 0x1B:
509 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
510 i += sizeof(rbac_page);
511 break;
512
513 case 0x1C:
514 memcpy(ptr + i, timer_page, sizeof(timer_page));
515 i += sizeof(timer_page);
516 break;
517
518 case 0x3F: // retrieve all pages
519 memcpy(ptr + i, timer_page, sizeof(timer_page));
520 i += sizeof(timer_page);
521 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
522 i += sizeof(rbac_page);
523 memcpy(ptr + i, cache_page, sizeof(cache_page));
524 i += sizeof(cache_page);
525 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
526 i += sizeof(rw_err_page);
527 break;
528 }
529
530 if (sense_6)
531 ptr[0] = i - 1;
532 else
533 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
534 usb_stor_set_xfer_buf(ptr, i, srb);
535
536 return USB_STOR_TRANSPORT_GOOD;
537}
538
539static void datafab_info_destructor(void *extra)
540{
541 // this routine is a placeholder...
542 // currently, we don't allocate any extra memory so we're okay
543}
544
545
546// Transport for the Datafab MDCFE-B
547//
548static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
549{
550 struct datafab_info *info;
551 int rc;
552 unsigned long block, blocks;
553 unsigned char *ptr = us->iobuf;
554 static unsigned char inquiry_reply[8] = {
555 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
556 };
557
558 if (!us->extra) {
559 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
560 if (!us->extra)
561 return USB_STOR_TRANSPORT_ERROR;
562
563 us->extra_destructor = datafab_info_destructor;
564 ((struct datafab_info *)us->extra)->lun = -1;
565 }
566
567 info = (struct datafab_info *) (us->extra);
568
569 if (srb->cmnd[0] == INQUIRY) {
570 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
571 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
572 fill_inquiry_response(us, ptr, 36);
573 return USB_STOR_TRANSPORT_GOOD;
574 }
575
576 if (srb->cmnd[0] == READ_CAPACITY) {
577 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
578 rc = datafab_id_device(us, info);
579 if (rc != USB_STOR_TRANSPORT_GOOD)
580 return rc;
581
582 usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
583 info->sectors, info->ssize);
584
585 // build the reply
586 // we need the last sector, not the number of sectors
587 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
588 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
589 usb_stor_set_xfer_buf(ptr, 8, srb);
590
591 return USB_STOR_TRANSPORT_GOOD;
592 }
593
594 if (srb->cmnd[0] == MODE_SELECT_10) {
595 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
596 return USB_STOR_TRANSPORT_ERROR;
597 }
598
599 // don't bother implementing READ_6 or WRITE_6.
600 //
601 if (srb->cmnd[0] == READ_10) {
602 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
603 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
604
605 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
606
607 usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n",
608 block, blocks);
609 return datafab_read_data(us, info, block, blocks);
610 }
611
612 if (srb->cmnd[0] == READ_12) {
613 // we'll probably never see a READ_12 but we'll do it anyway...
614 //
615 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
616 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
617
618 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
619 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
620
621 usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n",
622 block, blocks);
623 return datafab_read_data(us, info, block, blocks);
624 }
625
626 if (srb->cmnd[0] == WRITE_10) {
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[7]) << 8) | ((u32)(srb->cmnd[8]));
631
632 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
633 block, blocks);
634 return datafab_write_data(us, info, block, blocks);
635 }
636
637 if (srb->cmnd[0] == WRITE_12) {
638 // we'll probably never see a WRITE_12 but we'll do it anyway...
639 //
640 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
641 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
642
643 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
644 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
645
646 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
647 block, blocks);
648 return datafab_write_data(us, info, block, blocks);
649 }
650
651 if (srb->cmnd[0] == TEST_UNIT_READY) {
652 usb_stor_dbg(us, "TEST_UNIT_READY\n");
653 return datafab_id_device(us, info);
654 }
655
656 if (srb->cmnd[0] == REQUEST_SENSE) {
657 usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
658
659 // this response is pretty bogus right now. eventually if necessary
660 // we can set the correct sense data. so far though it hasn't been
661 // necessary
662 //
663 memset(ptr, 0, 18);
664 ptr[0] = 0xF0;
665 ptr[2] = info->sense_key;
666 ptr[7] = 11;
667 ptr[12] = info->sense_asc;
668 ptr[13] = info->sense_ascq;
669 usb_stor_set_xfer_buf(ptr, 18, srb);
670
671 return USB_STOR_TRANSPORT_GOOD;
672 }
673
674 if (srb->cmnd[0] == MODE_SENSE) {
675 usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
676 return datafab_handle_mode_sense(us, srb, 1);
677 }
678
679 if (srb->cmnd[0] == MODE_SENSE_10) {
680 usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
681 return datafab_handle_mode_sense(us, srb, 0);
682 }
683
684 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
685 /*
686 * sure. whatever. not like we can stop the user from
687 * popping the media out of the device (no locking doors, etc)
688 */
689 return USB_STOR_TRANSPORT_GOOD;
690 }
691
692 if (srb->cmnd[0] == START_STOP) {
693 /*
694 * this is used by sd.c'check_scsidisk_media_change to detect
695 * media change
696 */
697 usb_stor_dbg(us, "START_STOP\n");
698 /*
699 * the first datafab_id_device after a media change returns
700 * an error (determined experimentally)
701 */
702 rc = datafab_id_device(us, info);
703 if (rc == USB_STOR_TRANSPORT_GOOD) {
704 info->sense_key = NO_SENSE;
705 srb->result = SUCCESS;
706 } else {
707 info->sense_key = UNIT_ATTENTION;
708 srb->result = SAM_STAT_CHECK_CONDITION;
709 }
710 return rc;
711 }
712
713 usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
714 srb->cmnd[0], srb->cmnd[0]);
715 info->sense_key = 0x05;
716 info->sense_asc = 0x20;
717 info->sense_ascq = 0x00;
718 return USB_STOR_TRANSPORT_FAILED;
719}
720
721static struct scsi_host_template datafab_host_template;
722
723static 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 &datafab_host_template);
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 = DRV_NAME,
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_stor_driver(datafab_driver, datafab_host_template, DRV_NAME);
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#include "scsiglue.h"
63
64#define DRV_NAME "ums-datafab"
65
66MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
67MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
68MODULE_LICENSE("GPL");
69
70struct datafab_info {
71 unsigned long sectors; /* total sector count */
72 unsigned long ssize; /* sector size in bytes */
73 signed char lun; /* used for dual-slot readers */
74
75 /* the following aren't used yet */
76 unsigned char sense_key;
77 unsigned long sense_asc; /* additional sense code */
78 unsigned long sense_ascq; /* additional sense code qualifier */
79};
80
81static int datafab_determine_lun(struct us_data *us,
82 struct datafab_info *info);
83
84
85/*
86 * The table of devices
87 */
88#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
89 vendorName, productName, useProtocol, useTransport, \
90 initFunction, flags) \
91{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
92 .driver_info = (flags) }
93
94static struct usb_device_id datafab_usb_ids[] = {
95# include "unusual_datafab.h"
96 { } /* Terminating entry */
97};
98MODULE_DEVICE_TABLE(usb, datafab_usb_ids);
99
100#undef UNUSUAL_DEV
101
102/*
103 * The flags table
104 */
105#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
106 vendor_name, product_name, use_protocol, use_transport, \
107 init_function, Flags) \
108{ \
109 .vendorName = vendor_name, \
110 .productName = product_name, \
111 .useProtocol = use_protocol, \
112 .useTransport = use_transport, \
113 .initFunction = init_function, \
114}
115
116static struct us_unusual_dev datafab_unusual_dev_list[] = {
117# include "unusual_datafab.h"
118 { } /* Terminating entry */
119};
120
121#undef UNUSUAL_DEV
122
123
124static inline int
125datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
126 if (len == 0)
127 return USB_STOR_XFER_GOOD;
128
129 usb_stor_dbg(us, "len = %d\n", len);
130 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
131 data, len, NULL);
132}
133
134
135static inline int
136datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
137 if (len == 0)
138 return USB_STOR_XFER_GOOD;
139
140 usb_stor_dbg(us, "len = %d\n", len);
141 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
142 data, len, NULL);
143}
144
145
146static int datafab_read_data(struct us_data *us,
147 struct datafab_info *info,
148 u32 sector,
149 u32 sectors)
150{
151 unsigned char *command = us->iobuf;
152 unsigned char *buffer;
153 unsigned char thistime;
154 unsigned int totallen, alloclen;
155 int len, result;
156 unsigned int sg_offset = 0;
157 struct scatterlist *sg = NULL;
158
159 // we're working in LBA mode. according to the ATA spec,
160 // we can support up to 28-bit addressing. I don't know if Datafab
161 // supports beyond 24-bit addressing. It's kind of hard to test
162 // since it requires > 8GB CF card.
163 //
164 if (sectors > 0x0FFFFFFF)
165 return USB_STOR_TRANSPORT_ERROR;
166
167 if (info->lun == -1) {
168 result = datafab_determine_lun(us, info);
169 if (result != USB_STOR_TRANSPORT_GOOD)
170 return result;
171 }
172
173 totallen = sectors * info->ssize;
174
175 // Since we don't read more than 64 KB at a time, we have to create
176 // a bounce buffer and move the data a piece at a time between the
177 // bounce buffer and the actual transfer buffer.
178
179 alloclen = min(totallen, 65536u);
180 buffer = kmalloc(alloclen, GFP_NOIO);
181 if (buffer == NULL)
182 return USB_STOR_TRANSPORT_ERROR;
183
184 do {
185 // loop, never allocate or transfer more than 64k at once
186 // (min(128k, 255*info->ssize) is the real limit)
187
188 len = min(totallen, alloclen);
189 thistime = (len / info->ssize) & 0xff;
190
191 command[0] = 0;
192 command[1] = thistime;
193 command[2] = sector & 0xFF;
194 command[3] = (sector >> 8) & 0xFF;
195 command[4] = (sector >> 16) & 0xFF;
196
197 command[5] = 0xE0 + (info->lun << 4);
198 command[5] |= (sector >> 24) & 0x0F;
199 command[6] = 0x20;
200 command[7] = 0x01;
201
202 // send the read command
203 result = datafab_bulk_write(us, command, 8);
204 if (result != USB_STOR_XFER_GOOD)
205 goto leave;
206
207 // read the result
208 result = datafab_bulk_read(us, buffer, len);
209 if (result != USB_STOR_XFER_GOOD)
210 goto leave;
211
212 // Store the data in the transfer buffer
213 usb_stor_access_xfer_buf(buffer, len, us->srb,
214 &sg, &sg_offset, TO_XFER_BUF);
215
216 sector += thistime;
217 totallen -= len;
218 } while (totallen > 0);
219
220 kfree(buffer);
221 return USB_STOR_TRANSPORT_GOOD;
222
223 leave:
224 kfree(buffer);
225 return USB_STOR_TRANSPORT_ERROR;
226}
227
228
229static int datafab_write_data(struct us_data *us,
230 struct datafab_info *info,
231 u32 sector,
232 u32 sectors)
233{
234 unsigned char *command = us->iobuf;
235 unsigned char *reply = us->iobuf;
236 unsigned char *buffer;
237 unsigned char thistime;
238 unsigned int totallen, alloclen;
239 int len, result;
240 unsigned int sg_offset = 0;
241 struct scatterlist *sg = NULL;
242
243 // we're working in LBA mode. according to the ATA spec,
244 // we can support up to 28-bit addressing. I don't know if Datafab
245 // supports beyond 24-bit addressing. It's kind of hard to test
246 // since it requires > 8GB CF card.
247 //
248 if (sectors > 0x0FFFFFFF)
249 return USB_STOR_TRANSPORT_ERROR;
250
251 if (info->lun == -1) {
252 result = datafab_determine_lun(us, info);
253 if (result != USB_STOR_TRANSPORT_GOOD)
254 return result;
255 }
256
257 totallen = sectors * info->ssize;
258
259 // Since we don't write more than 64 KB at a time, we have to create
260 // a bounce buffer and move the data a piece at a time between the
261 // bounce buffer and the actual transfer buffer.
262
263 alloclen = min(totallen, 65536u);
264 buffer = kmalloc(alloclen, GFP_NOIO);
265 if (buffer == NULL)
266 return USB_STOR_TRANSPORT_ERROR;
267
268 do {
269 // loop, never allocate or transfer more than 64k at once
270 // (min(128k, 255*info->ssize) is the real limit)
271
272 len = min(totallen, alloclen);
273 thistime = (len / info->ssize) & 0xff;
274
275 // Get the data from the transfer buffer
276 usb_stor_access_xfer_buf(buffer, len, us->srb,
277 &sg, &sg_offset, FROM_XFER_BUF);
278
279 command[0] = 0;
280 command[1] = thistime;
281 command[2] = sector & 0xFF;
282 command[3] = (sector >> 8) & 0xFF;
283 command[4] = (sector >> 16) & 0xFF;
284
285 command[5] = 0xE0 + (info->lun << 4);
286 command[5] |= (sector >> 24) & 0x0F;
287 command[6] = 0x30;
288 command[7] = 0x02;
289
290 // send the command
291 result = datafab_bulk_write(us, command, 8);
292 if (result != USB_STOR_XFER_GOOD)
293 goto leave;
294
295 // send the data
296 result = datafab_bulk_write(us, buffer, len);
297 if (result != USB_STOR_XFER_GOOD)
298 goto leave;
299
300 // read the result
301 result = datafab_bulk_read(us, reply, 2);
302 if (result != USB_STOR_XFER_GOOD)
303 goto leave;
304
305 if (reply[0] != 0x50 && reply[1] != 0) {
306 usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
307 reply[0], reply[1]);
308 result = USB_STOR_TRANSPORT_ERROR;
309 goto leave;
310 }
311
312 sector += thistime;
313 totallen -= len;
314 } while (totallen > 0);
315
316 kfree(buffer);
317 return USB_STOR_TRANSPORT_GOOD;
318
319 leave:
320 kfree(buffer);
321 return USB_STOR_TRANSPORT_ERROR;
322}
323
324
325static int datafab_determine_lun(struct us_data *us,
326 struct datafab_info *info)
327{
328 // Dual-slot readers can be thought of as dual-LUN devices.
329 // We need to determine which card slot is being used.
330 // We'll send an IDENTIFY DEVICE command and see which LUN responds...
331 //
332 // There might be a better way of doing this?
333
334 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
335 unsigned char *command = us->iobuf;
336 unsigned char *buf;
337 int count = 0, rc;
338
339 if (!info)
340 return USB_STOR_TRANSPORT_ERROR;
341
342 memcpy(command, scommand, 8);
343 buf = kmalloc(512, GFP_NOIO);
344 if (!buf)
345 return USB_STOR_TRANSPORT_ERROR;
346
347 usb_stor_dbg(us, "locating...\n");
348
349 // we'll try 3 times before giving up...
350 //
351 while (count++ < 3) {
352 command[5] = 0xa0;
353
354 rc = datafab_bulk_write(us, command, 8);
355 if (rc != USB_STOR_XFER_GOOD) {
356 rc = USB_STOR_TRANSPORT_ERROR;
357 goto leave;
358 }
359
360 rc = datafab_bulk_read(us, buf, 512);
361 if (rc == USB_STOR_XFER_GOOD) {
362 info->lun = 0;
363 rc = USB_STOR_TRANSPORT_GOOD;
364 goto leave;
365 }
366
367 command[5] = 0xb0;
368
369 rc = datafab_bulk_write(us, command, 8);
370 if (rc != USB_STOR_XFER_GOOD) {
371 rc = USB_STOR_TRANSPORT_ERROR;
372 goto leave;
373 }
374
375 rc = datafab_bulk_read(us, buf, 512);
376 if (rc == USB_STOR_XFER_GOOD) {
377 info->lun = 1;
378 rc = USB_STOR_TRANSPORT_GOOD;
379 goto leave;
380 }
381
382 msleep(20);
383 }
384
385 rc = USB_STOR_TRANSPORT_ERROR;
386
387 leave:
388 kfree(buf);
389 return rc;
390}
391
392static int datafab_id_device(struct us_data *us,
393 struct datafab_info *info)
394{
395 // this is a variation of the ATA "IDENTIFY DEVICE" command...according
396 // to the ATA spec, 'Sector Count' isn't used but the Windows driver
397 // sets this bit so we do too...
398 //
399 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
400 unsigned char *command = us->iobuf;
401 unsigned char *reply;
402 int rc;
403
404 if (!info)
405 return USB_STOR_TRANSPORT_ERROR;
406
407 if (info->lun == -1) {
408 rc = datafab_determine_lun(us, info);
409 if (rc != USB_STOR_TRANSPORT_GOOD)
410 return rc;
411 }
412
413 memcpy(command, scommand, 8);
414 reply = kmalloc(512, GFP_NOIO);
415 if (!reply)
416 return USB_STOR_TRANSPORT_ERROR;
417
418 command[5] += (info->lun << 4);
419
420 rc = datafab_bulk_write(us, command, 8);
421 if (rc != USB_STOR_XFER_GOOD) {
422 rc = USB_STOR_TRANSPORT_ERROR;
423 goto leave;
424 }
425
426 // we'll go ahead and extract the media capacity while we're here...
427 //
428 rc = datafab_bulk_read(us, reply, 512);
429 if (rc == USB_STOR_XFER_GOOD) {
430 // capacity is at word offset 57-58
431 //
432 info->sectors = ((u32)(reply[117]) << 24) |
433 ((u32)(reply[116]) << 16) |
434 ((u32)(reply[115]) << 8) |
435 ((u32)(reply[114]) );
436 rc = USB_STOR_TRANSPORT_GOOD;
437 goto leave;
438 }
439
440 rc = USB_STOR_TRANSPORT_ERROR;
441
442 leave:
443 kfree(reply);
444 return rc;
445}
446
447
448static int datafab_handle_mode_sense(struct us_data *us,
449 struct scsi_cmnd * srb,
450 int sense_6)
451{
452 static unsigned char rw_err_page[12] = {
453 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
454 };
455 static unsigned char cache_page[12] = {
456 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
457 };
458 static unsigned char rbac_page[12] = {
459 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
460 };
461 static unsigned char timer_page[8] = {
462 0x1C, 0x6, 0, 0, 0, 0
463 };
464 unsigned char pc, page_code;
465 unsigned int i = 0;
466 struct datafab_info *info = (struct datafab_info *) (us->extra);
467 unsigned char *ptr = us->iobuf;
468
469 // most of this stuff is just a hack to get things working. the
470 // datafab reader doesn't present a SCSI interface so we
471 // fudge the SCSI commands...
472 //
473
474 pc = srb->cmnd[2] >> 6;
475 page_code = srb->cmnd[2] & 0x3F;
476
477 switch (pc) {
478 case 0x0:
479 usb_stor_dbg(us, "Current values\n");
480 break;
481 case 0x1:
482 usb_stor_dbg(us, "Changeable values\n");
483 break;
484 case 0x2:
485 usb_stor_dbg(us, "Default values\n");
486 break;
487 case 0x3:
488 usb_stor_dbg(us, "Saves values\n");
489 break;
490 }
491
492 memset(ptr, 0, 8);
493 if (sense_6) {
494 ptr[2] = 0x00; // WP enable: 0x80
495 i = 4;
496 } else {
497 ptr[3] = 0x00; // WP enable: 0x80
498 i = 8;
499 }
500
501 switch (page_code) {
502 default:
503 // vendor-specific mode
504 info->sense_key = 0x05;
505 info->sense_asc = 0x24;
506 info->sense_ascq = 0x00;
507 return USB_STOR_TRANSPORT_FAILED;
508
509 case 0x1:
510 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
511 i += sizeof(rw_err_page);
512 break;
513
514 case 0x8:
515 memcpy(ptr + i, cache_page, sizeof(cache_page));
516 i += sizeof(cache_page);
517 break;
518
519 case 0x1B:
520 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
521 i += sizeof(rbac_page);
522 break;
523
524 case 0x1C:
525 memcpy(ptr + i, timer_page, sizeof(timer_page));
526 i += sizeof(timer_page);
527 break;
528
529 case 0x3F: // retrieve all pages
530 memcpy(ptr + i, timer_page, sizeof(timer_page));
531 i += sizeof(timer_page);
532 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
533 i += sizeof(rbac_page);
534 memcpy(ptr + i, cache_page, sizeof(cache_page));
535 i += sizeof(cache_page);
536 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
537 i += sizeof(rw_err_page);
538 break;
539 }
540
541 if (sense_6)
542 ptr[0] = i - 1;
543 else
544 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
545 usb_stor_set_xfer_buf(ptr, i, srb);
546
547 return USB_STOR_TRANSPORT_GOOD;
548}
549
550static void datafab_info_destructor(void *extra)
551{
552 // this routine is a placeholder...
553 // currently, we don't allocate any extra memory so we're okay
554}
555
556
557// Transport for the Datafab MDCFE-B
558//
559static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
560{
561 struct datafab_info *info;
562 int rc;
563 unsigned long block, blocks;
564 unsigned char *ptr = us->iobuf;
565 static unsigned char inquiry_reply[8] = {
566 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
567 };
568
569 if (!us->extra) {
570 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
571 if (!us->extra)
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 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
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 usb_stor_dbg(us, "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 usb_stor_dbg(us, "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 usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n",
619 block, blocks);
620 return datafab_read_data(us, info, block, blocks);
621 }
622
623 if (srb->cmnd[0] == READ_12) {
624 // we'll probably never see a READ_12 but we'll do it anyway...
625 //
626 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
627 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
628
629 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
630 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
631
632 usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n",
633 block, blocks);
634 return datafab_read_data(us, info, block, blocks);
635 }
636
637 if (srb->cmnd[0] == WRITE_10) {
638 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
639 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
640
641 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
642
643 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
644 block, blocks);
645 return datafab_write_data(us, info, block, blocks);
646 }
647
648 if (srb->cmnd[0] == WRITE_12) {
649 // we'll probably never see a WRITE_12 but we'll do it anyway...
650 //
651 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
652 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
653
654 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
655 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
656
657 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
658 block, blocks);
659 return datafab_write_data(us, info, block, blocks);
660 }
661
662 if (srb->cmnd[0] == TEST_UNIT_READY) {
663 usb_stor_dbg(us, "TEST_UNIT_READY\n");
664 return datafab_id_device(us, info);
665 }
666
667 if (srb->cmnd[0] == REQUEST_SENSE) {
668 usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
669
670 // this response is pretty bogus right now. eventually if necessary
671 // we can set the correct sense data. so far though it hasn't been
672 // necessary
673 //
674 memset(ptr, 0, 18);
675 ptr[0] = 0xF0;
676 ptr[2] = info->sense_key;
677 ptr[7] = 11;
678 ptr[12] = info->sense_asc;
679 ptr[13] = info->sense_ascq;
680 usb_stor_set_xfer_buf(ptr, 18, srb);
681
682 return USB_STOR_TRANSPORT_GOOD;
683 }
684
685 if (srb->cmnd[0] == MODE_SENSE) {
686 usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
687 return datafab_handle_mode_sense(us, srb, 1);
688 }
689
690 if (srb->cmnd[0] == MODE_SENSE_10) {
691 usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
692 return datafab_handle_mode_sense(us, srb, 0);
693 }
694
695 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
696 // sure. whatever. not like we can stop the user from
697 // popping the media out of the device (no locking doors, etc)
698 //
699 return USB_STOR_TRANSPORT_GOOD;
700 }
701
702 if (srb->cmnd[0] == START_STOP) {
703 /* this is used by sd.c'check_scsidisk_media_change to detect
704 media change */
705 usb_stor_dbg(us, "START_STOP\n");
706 /* the first datafab_id_device after a media change returns
707 an error (determined experimentally) */
708 rc = datafab_id_device(us, info);
709 if (rc == USB_STOR_TRANSPORT_GOOD) {
710 info->sense_key = NO_SENSE;
711 srb->result = SUCCESS;
712 } else {
713 info->sense_key = UNIT_ATTENTION;
714 srb->result = SAM_STAT_CHECK_CONDITION;
715 }
716 return rc;
717 }
718
719 usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
720 srb->cmnd[0], srb->cmnd[0]);
721 info->sense_key = 0x05;
722 info->sense_asc = 0x20;
723 info->sense_ascq = 0x00;
724 return USB_STOR_TRANSPORT_FAILED;
725}
726
727static struct scsi_host_template datafab_host_template;
728
729static int datafab_probe(struct usb_interface *intf,
730 const struct usb_device_id *id)
731{
732 struct us_data *us;
733 int result;
734
735 result = usb_stor_probe1(&us, intf, id,
736 (id - datafab_usb_ids) + datafab_unusual_dev_list,
737 &datafab_host_template);
738 if (result)
739 return result;
740
741 us->transport_name = "Datafab Bulk-Only";
742 us->transport = datafab_transport;
743 us->transport_reset = usb_stor_Bulk_reset;
744 us->max_lun = 1;
745
746 result = usb_stor_probe2(us);
747 return result;
748}
749
750static struct usb_driver datafab_driver = {
751 .name = DRV_NAME,
752 .probe = datafab_probe,
753 .disconnect = usb_stor_disconnect,
754 .suspend = usb_stor_suspend,
755 .resume = usb_stor_resume,
756 .reset_resume = usb_stor_reset_resume,
757 .pre_reset = usb_stor_pre_reset,
758 .post_reset = usb_stor_post_reset,
759 .id_table = datafab_usb_ids,
760 .soft_unbind = 1,
761 .no_dynamic_id = 1,
762};
763
764module_usb_stor_driver(datafab_driver, datafab_host_template, DRV_NAME);