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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
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)|(USB_US_TYPE_STOR<<24) }
90
91struct 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 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
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 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
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 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
323static 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
390static 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
446static 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
548static 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//
557static 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
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 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
743static 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
756static int __init datafab_init(void)
757{
758 return usb_register(&datafab_driver);
759}
760
761static void __exit datafab_exit(void)
762{
763 usb_deregister(&datafab_driver);
764}
765
766module_init(datafab_init);
767module_exit(datafab_exit);