Commit | Line | Data |
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1da177e4 | 1 | /* Driver for Datafab USB Compact Flash reader |
1da177e4 LT |
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 | ||
1da177e4 LT |
51 | #include <linux/errno.h> |
52 | #include <linux/slab.h> | |
53 | ||
54 | #include <scsi/scsi.h> | |
55 | #include <scsi/scsi_cmnd.h> | |
56 | ||
57 | #include "usb.h" | |
58 | #include "transport.h" | |
59 | #include "protocol.h" | |
60 | #include "debug.h" | |
61 | #include "datafab.h" | |
62 | ||
63 | static int datafab_determine_lun(struct us_data *us, | |
64 | struct datafab_info *info); | |
65 | ||
66 | ||
67 | static inline int | |
68 | datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) { | |
69 | if (len == 0) | |
70 | return USB_STOR_XFER_GOOD; | |
71 | ||
72 | US_DEBUGP("datafab_bulk_read: len = %d\n", len); | |
73 | return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, | |
74 | data, len, NULL); | |
75 | } | |
76 | ||
77 | ||
78 | static inline int | |
79 | datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) { | |
80 | if (len == 0) | |
81 | return USB_STOR_XFER_GOOD; | |
82 | ||
83 | US_DEBUGP("datafab_bulk_write: len = %d\n", len); | |
84 | return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, | |
85 | data, len, NULL); | |
86 | } | |
87 | ||
88 | ||
89 | static int datafab_read_data(struct us_data *us, | |
90 | struct datafab_info *info, | |
91 | u32 sector, | |
92 | u32 sectors) | |
93 | { | |
94 | unsigned char *command = us->iobuf; | |
95 | unsigned char *buffer; | |
96 | unsigned char thistime; | |
97 | unsigned int totallen, alloclen; | |
98 | int len, result; | |
1f6f31a0 JA |
99 | unsigned int sg_offset = 0; |
100 | struct scatterlist *sg = NULL; | |
1da177e4 LT |
101 | |
102 | // we're working in LBA mode. according to the ATA spec, | |
103 | // we can support up to 28-bit addressing. I don't know if Datafab | |
104 | // supports beyond 24-bit addressing. It's kind of hard to test | |
105 | // since it requires > 8GB CF card. | |
106 | // | |
107 | if (sectors > 0x0FFFFFFF) | |
108 | return USB_STOR_TRANSPORT_ERROR; | |
109 | ||
110 | if (info->lun == -1) { | |
111 | result = datafab_determine_lun(us, info); | |
112 | if (result != USB_STOR_TRANSPORT_GOOD) | |
113 | return result; | |
114 | } | |
115 | ||
116 | totallen = sectors * info->ssize; | |
117 | ||
118 | // Since we don't read more than 64 KB at a time, we have to create | |
119 | // a bounce buffer and move the data a piece at a time between the | |
120 | // bounce buffer and the actual transfer buffer. | |
121 | ||
122 | alloclen = min(totallen, 65536u); | |
123 | buffer = kmalloc(alloclen, GFP_NOIO); | |
124 | if (buffer == NULL) | |
125 | return USB_STOR_TRANSPORT_ERROR; | |
126 | ||
127 | do { | |
128 | // loop, never allocate or transfer more than 64k at once | |
129 | // (min(128k, 255*info->ssize) is the real limit) | |
130 | ||
131 | len = min(totallen, alloclen); | |
132 | thistime = (len / info->ssize) & 0xff; | |
133 | ||
134 | command[0] = 0; | |
135 | command[1] = thistime; | |
136 | command[2] = sector & 0xFF; | |
137 | command[3] = (sector >> 8) & 0xFF; | |
138 | command[4] = (sector >> 16) & 0xFF; | |
139 | ||
140 | command[5] = 0xE0 + (info->lun << 4); | |
141 | command[5] |= (sector >> 24) & 0x0F; | |
142 | command[6] = 0x20; | |
143 | command[7] = 0x01; | |
144 | ||
145 | // send the read command | |
146 | result = datafab_bulk_write(us, command, 8); | |
147 | if (result != USB_STOR_XFER_GOOD) | |
148 | goto leave; | |
149 | ||
150 | // read the result | |
151 | result = datafab_bulk_read(us, buffer, len); | |
152 | if (result != USB_STOR_XFER_GOOD) | |
153 | goto leave; | |
154 | ||
155 | // Store the data in the transfer buffer | |
156 | usb_stor_access_xfer_buf(buffer, len, us->srb, | |
1f6f31a0 | 157 | &sg, &sg_offset, TO_XFER_BUF); |
1da177e4 LT |
158 | |
159 | sector += thistime; | |
160 | totallen -= len; | |
161 | } while (totallen > 0); | |
162 | ||
163 | kfree(buffer); | |
164 | return USB_STOR_TRANSPORT_GOOD; | |
165 | ||
166 | leave: | |
167 | kfree(buffer); | |
168 | return USB_STOR_TRANSPORT_ERROR; | |
169 | } | |
170 | ||
171 | ||
172 | static int datafab_write_data(struct us_data *us, | |
173 | struct datafab_info *info, | |
174 | u32 sector, | |
175 | u32 sectors) | |
176 | { | |
177 | unsigned char *command = us->iobuf; | |
178 | unsigned char *reply = us->iobuf; | |
179 | unsigned char *buffer; | |
180 | unsigned char thistime; | |
181 | unsigned int totallen, alloclen; | |
182 | int len, result; | |
1f6f31a0 JA |
183 | unsigned int sg_offset = 0; |
184 | struct scatterlist *sg = NULL; | |
1da177e4 LT |
185 | |
186 | // we're working in LBA mode. according to the ATA spec, | |
187 | // we can support up to 28-bit addressing. I don't know if Datafab | |
188 | // supports beyond 24-bit addressing. It's kind of hard to test | |
189 | // since it requires > 8GB CF card. | |
190 | // | |
191 | if (sectors > 0x0FFFFFFF) | |
192 | return USB_STOR_TRANSPORT_ERROR; | |
193 | ||
194 | if (info->lun == -1) { | |
195 | result = datafab_determine_lun(us, info); | |
196 | if (result != USB_STOR_TRANSPORT_GOOD) | |
197 | return result; | |
198 | } | |
199 | ||
200 | totallen = sectors * info->ssize; | |
201 | ||
202 | // Since we don't write more than 64 KB at a time, we have to create | |
203 | // a bounce buffer and move the data a piece at a time between the | |
204 | // bounce buffer and the actual transfer buffer. | |
205 | ||
206 | alloclen = min(totallen, 65536u); | |
207 | buffer = kmalloc(alloclen, GFP_NOIO); | |
208 | if (buffer == NULL) | |
209 | return USB_STOR_TRANSPORT_ERROR; | |
210 | ||
211 | do { | |
212 | // loop, never allocate or transfer more than 64k at once | |
213 | // (min(128k, 255*info->ssize) is the real limit) | |
214 | ||
215 | len = min(totallen, alloclen); | |
216 | thistime = (len / info->ssize) & 0xff; | |
217 | ||
218 | // Get the data from the transfer buffer | |
219 | usb_stor_access_xfer_buf(buffer, len, us->srb, | |
1f6f31a0 | 220 | &sg, &sg_offset, FROM_XFER_BUF); |
1da177e4 LT |
221 | |
222 | command[0] = 0; | |
223 | command[1] = thistime; | |
224 | command[2] = sector & 0xFF; | |
225 | command[3] = (sector >> 8) & 0xFF; | |
226 | command[4] = (sector >> 16) & 0xFF; | |
227 | ||
228 | command[5] = 0xE0 + (info->lun << 4); | |
229 | command[5] |= (sector >> 24) & 0x0F; | |
230 | command[6] = 0x30; | |
231 | command[7] = 0x02; | |
232 | ||
233 | // send the command | |
234 | result = datafab_bulk_write(us, command, 8); | |
235 | if (result != USB_STOR_XFER_GOOD) | |
236 | goto leave; | |
237 | ||
238 | // send the data | |
239 | result = datafab_bulk_write(us, buffer, len); | |
240 | if (result != USB_STOR_XFER_GOOD) | |
241 | goto leave; | |
242 | ||
243 | // read the result | |
244 | result = datafab_bulk_read(us, reply, 2); | |
245 | if (result != USB_STOR_XFER_GOOD) | |
246 | goto leave; | |
247 | ||
248 | if (reply[0] != 0x50 && reply[1] != 0) { | |
249 | US_DEBUGP("datafab_write_data: Gah! " | |
250 | "write return code: %02x %02x\n", | |
251 | reply[0], reply[1]); | |
252 | result = USB_STOR_TRANSPORT_ERROR; | |
253 | goto leave; | |
254 | } | |
255 | ||
256 | sector += thistime; | |
257 | totallen -= len; | |
258 | } while (totallen > 0); | |
259 | ||
260 | kfree(buffer); | |
261 | return USB_STOR_TRANSPORT_GOOD; | |
262 | ||
263 | leave: | |
264 | kfree(buffer); | |
265 | return USB_STOR_TRANSPORT_ERROR; | |
266 | } | |
267 | ||
268 | ||
269 | static int datafab_determine_lun(struct us_data *us, | |
270 | struct datafab_info *info) | |
271 | { | |
272 | // Dual-slot readers can be thought of as dual-LUN devices. | |
273 | // We need to determine which card slot is being used. | |
274 | // We'll send an IDENTIFY DEVICE command and see which LUN responds... | |
275 | // | |
276 | // There might be a better way of doing this? | |
277 | ||
278 | static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; | |
279 | unsigned char *command = us->iobuf; | |
280 | unsigned char *buf; | |
281 | int count = 0, rc; | |
282 | ||
283 | if (!us || !info) | |
284 | return USB_STOR_TRANSPORT_ERROR; | |
285 | ||
286 | memcpy(command, scommand, 8); | |
287 | buf = kmalloc(512, GFP_NOIO); | |
288 | if (!buf) | |
289 | return USB_STOR_TRANSPORT_ERROR; | |
290 | ||
291 | US_DEBUGP("datafab_determine_lun: locating...\n"); | |
292 | ||
293 | // we'll try 3 times before giving up... | |
294 | // | |
295 | while (count++ < 3) { | |
296 | command[5] = 0xa0; | |
297 | ||
298 | rc = datafab_bulk_write(us, command, 8); | |
299 | if (rc != USB_STOR_XFER_GOOD) { | |
300 | rc = USB_STOR_TRANSPORT_ERROR; | |
301 | goto leave; | |
302 | } | |
303 | ||
304 | rc = datafab_bulk_read(us, buf, 512); | |
305 | if (rc == USB_STOR_XFER_GOOD) { | |
306 | info->lun = 0; | |
307 | rc = USB_STOR_TRANSPORT_GOOD; | |
308 | goto leave; | |
309 | } | |
310 | ||
311 | command[5] = 0xb0; | |
312 | ||
313 | rc = datafab_bulk_write(us, command, 8); | |
314 | if (rc != USB_STOR_XFER_GOOD) { | |
315 | rc = USB_STOR_TRANSPORT_ERROR; | |
316 | goto leave; | |
317 | } | |
318 | ||
319 | rc = datafab_bulk_read(us, buf, 512); | |
320 | if (rc == USB_STOR_XFER_GOOD) { | |
321 | info->lun = 1; | |
322 | rc = USB_STOR_TRANSPORT_GOOD; | |
323 | goto leave; | |
324 | } | |
325 | ||
326 | msleep(20); | |
327 | } | |
328 | ||
329 | rc = USB_STOR_TRANSPORT_ERROR; | |
330 | ||
331 | leave: | |
332 | kfree(buf); | |
333 | return rc; | |
334 | } | |
335 | ||
336 | static int datafab_id_device(struct us_data *us, | |
337 | struct datafab_info *info) | |
338 | { | |
339 | // this is a variation of the ATA "IDENTIFY DEVICE" command...according | |
340 | // to the ATA spec, 'Sector Count' isn't used but the Windows driver | |
341 | // sets this bit so we do too... | |
342 | // | |
343 | static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; | |
344 | unsigned char *command = us->iobuf; | |
345 | unsigned char *reply; | |
346 | int rc; | |
347 | ||
348 | if (!us || !info) | |
349 | return USB_STOR_TRANSPORT_ERROR; | |
350 | ||
351 | if (info->lun == -1) { | |
352 | rc = datafab_determine_lun(us, info); | |
353 | if (rc != USB_STOR_TRANSPORT_GOOD) | |
354 | return rc; | |
355 | } | |
356 | ||
357 | memcpy(command, scommand, 8); | |
358 | reply = kmalloc(512, GFP_NOIO); | |
359 | if (!reply) | |
360 | return USB_STOR_TRANSPORT_ERROR; | |
361 | ||
362 | command[5] += (info->lun << 4); | |
363 | ||
364 | rc = datafab_bulk_write(us, command, 8); | |
365 | if (rc != USB_STOR_XFER_GOOD) { | |
366 | rc = USB_STOR_TRANSPORT_ERROR; | |
367 | goto leave; | |
368 | } | |
369 | ||
370 | // we'll go ahead and extract the media capacity while we're here... | |
371 | // | |
372 | rc = datafab_bulk_read(us, reply, 512); | |
373 | if (rc == USB_STOR_XFER_GOOD) { | |
374 | // capacity is at word offset 57-58 | |
375 | // | |
376 | info->sectors = ((u32)(reply[117]) << 24) | | |
377 | ((u32)(reply[116]) << 16) | | |
378 | ((u32)(reply[115]) << 8) | | |
379 | ((u32)(reply[114]) ); | |
380 | rc = USB_STOR_TRANSPORT_GOOD; | |
381 | goto leave; | |
382 | } | |
383 | ||
384 | rc = USB_STOR_TRANSPORT_ERROR; | |
385 | ||
386 | leave: | |
387 | kfree(reply); | |
388 | return rc; | |
389 | } | |
390 | ||
391 | ||
392 | static int datafab_handle_mode_sense(struct us_data *us, | |
393 | struct scsi_cmnd * srb, | |
394 | int sense_6) | |
395 | { | |
396 | static unsigned char rw_err_page[12] = { | |
397 | 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0 | |
398 | }; | |
399 | static unsigned char cache_page[12] = { | |
400 | 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
401 | }; | |
402 | static unsigned char rbac_page[12] = { | |
403 | 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0 | |
404 | }; | |
405 | static unsigned char timer_page[8] = { | |
406 | 0x1C, 0x6, 0, 0, 0, 0 | |
407 | }; | |
408 | unsigned char pc, page_code; | |
409 | unsigned int i = 0; | |
410 | struct datafab_info *info = (struct datafab_info *) (us->extra); | |
411 | unsigned char *ptr = us->iobuf; | |
412 | ||
413 | // most of this stuff is just a hack to get things working. the | |
414 | // datafab reader doesn't present a SCSI interface so we | |
415 | // fudge the SCSI commands... | |
416 | // | |
417 | ||
418 | pc = srb->cmnd[2] >> 6; | |
419 | page_code = srb->cmnd[2] & 0x3F; | |
420 | ||
421 | switch (pc) { | |
422 | case 0x0: | |
423 | US_DEBUGP("datafab_handle_mode_sense: Current values\n"); | |
424 | break; | |
425 | case 0x1: | |
426 | US_DEBUGP("datafab_handle_mode_sense: Changeable values\n"); | |
427 | break; | |
428 | case 0x2: | |
429 | US_DEBUGP("datafab_handle_mode_sense: Default values\n"); | |
430 | break; | |
431 | case 0x3: | |
432 | US_DEBUGP("datafab_handle_mode_sense: Saves values\n"); | |
433 | break; | |
434 | } | |
435 | ||
436 | memset(ptr, 0, 8); | |
437 | if (sense_6) { | |
438 | ptr[2] = 0x00; // WP enable: 0x80 | |
439 | i = 4; | |
440 | } else { | |
441 | ptr[3] = 0x00; // WP enable: 0x80 | |
442 | i = 8; | |
443 | } | |
444 | ||
445 | switch (page_code) { | |
446 | default: | |
447 | // vendor-specific mode | |
448 | info->sense_key = 0x05; | |
449 | info->sense_asc = 0x24; | |
450 | info->sense_ascq = 0x00; | |
451 | return USB_STOR_TRANSPORT_FAILED; | |
452 | ||
453 | case 0x1: | |
454 | memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); | |
455 | i += sizeof(rw_err_page); | |
456 | break; | |
457 | ||
458 | case 0x8: | |
459 | memcpy(ptr + i, cache_page, sizeof(cache_page)); | |
460 | i += sizeof(cache_page); | |
461 | break; | |
462 | ||
463 | case 0x1B: | |
464 | memcpy(ptr + i, rbac_page, sizeof(rbac_page)); | |
465 | i += sizeof(rbac_page); | |
466 | break; | |
467 | ||
468 | case 0x1C: | |
469 | memcpy(ptr + i, timer_page, sizeof(timer_page)); | |
470 | i += sizeof(timer_page); | |
471 | break; | |
472 | ||
473 | case 0x3F: // retrieve all pages | |
474 | memcpy(ptr + i, timer_page, sizeof(timer_page)); | |
475 | i += sizeof(timer_page); | |
476 | memcpy(ptr + i, rbac_page, sizeof(rbac_page)); | |
477 | i += sizeof(rbac_page); | |
478 | memcpy(ptr + i, cache_page, sizeof(cache_page)); | |
479 | i += sizeof(cache_page); | |
480 | memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); | |
481 | i += sizeof(rw_err_page); | |
482 | break; | |
483 | } | |
484 | ||
485 | if (sense_6) | |
486 | ptr[0] = i - 1; | |
487 | else | |
488 | ((__be16 *) ptr)[0] = cpu_to_be16(i - 2); | |
489 | usb_stor_set_xfer_buf(ptr, i, srb); | |
490 | ||
491 | return USB_STOR_TRANSPORT_GOOD; | |
492 | } | |
493 | ||
494 | static void datafab_info_destructor(void *extra) | |
495 | { | |
496 | // this routine is a placeholder... | |
497 | // currently, we don't allocate any extra memory so we're okay | |
498 | } | |
499 | ||
500 | ||
501 | // Transport for the Datafab MDCFE-B | |
502 | // | |
503 | int datafab_transport(struct scsi_cmnd * srb, struct us_data *us) | |
504 | { | |
505 | struct datafab_info *info; | |
506 | int rc; | |
507 | unsigned long block, blocks; | |
508 | unsigned char *ptr = us->iobuf; | |
509 | static unsigned char inquiry_reply[8] = { | |
510 | 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00 | |
511 | }; | |
512 | ||
513 | if (!us->extra) { | |
887c2560 | 514 | us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO); |
1da177e4 LT |
515 | if (!us->extra) { |
516 | US_DEBUGP("datafab_transport: Gah! " | |
517 | "Can't allocate storage for Datafab info struct!\n"); | |
518 | return USB_STOR_TRANSPORT_ERROR; | |
519 | } | |
1da177e4 LT |
520 | us->extra_destructor = datafab_info_destructor; |
521 | ((struct datafab_info *)us->extra)->lun = -1; | |
522 | } | |
523 | ||
524 | info = (struct datafab_info *) (us->extra); | |
525 | ||
526 | if (srb->cmnd[0] == INQUIRY) { | |
527 | US_DEBUGP("datafab_transport: INQUIRY. Returning bogus response"); | |
528 | memcpy(ptr, inquiry_reply, sizeof(inquiry_reply)); | |
529 | fill_inquiry_response(us, ptr, 36); | |
530 | return USB_STOR_TRANSPORT_GOOD; | |
531 | } | |
532 | ||
533 | if (srb->cmnd[0] == READ_CAPACITY) { | |
534 | info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec | |
535 | rc = datafab_id_device(us, info); | |
536 | if (rc != USB_STOR_TRANSPORT_GOOD) | |
537 | return rc; | |
538 | ||
539 | US_DEBUGP("datafab_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n", | |
540 | info->sectors, info->ssize); | |
541 | ||
542 | // build the reply | |
543 | // we need the last sector, not the number of sectors | |
544 | ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1); | |
545 | ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize); | |
546 | usb_stor_set_xfer_buf(ptr, 8, srb); | |
547 | ||
548 | return USB_STOR_TRANSPORT_GOOD; | |
549 | } | |
550 | ||
551 | if (srb->cmnd[0] == MODE_SELECT_10) { | |
552 | US_DEBUGP("datafab_transport: Gah! MODE_SELECT_10.\n"); | |
553 | return USB_STOR_TRANSPORT_ERROR; | |
554 | } | |
555 | ||
556 | // don't bother implementing READ_6 or WRITE_6. | |
557 | // | |
558 | if (srb->cmnd[0] == READ_10) { | |
559 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | | |
560 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); | |
561 | ||
562 | blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); | |
563 | ||
564 | US_DEBUGP("datafab_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks); | |
565 | return datafab_read_data(us, info, block, blocks); | |
566 | } | |
567 | ||
568 | if (srb->cmnd[0] == READ_12) { | |
569 | // we'll probably never see a READ_12 but we'll do it anyway... | |
570 | // | |
571 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | | |
572 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); | |
573 | ||
574 | blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | | |
575 | ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); | |
576 | ||
577 | US_DEBUGP("datafab_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks); | |
578 | return datafab_read_data(us, info, block, blocks); | |
579 | } | |
580 | ||
581 | if (srb->cmnd[0] == WRITE_10) { | |
582 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | | |
583 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); | |
584 | ||
585 | blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); | |
586 | ||
587 | US_DEBUGP("datafab_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks); | |
588 | return datafab_write_data(us, info, block, blocks); | |
589 | } | |
590 | ||
591 | if (srb->cmnd[0] == WRITE_12) { | |
592 | // we'll probably never see a WRITE_12 but we'll do it anyway... | |
593 | // | |
594 | block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | | |
595 | ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); | |
596 | ||
597 | blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | | |
598 | ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); | |
599 | ||
600 | US_DEBUGP("datafab_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks); | |
601 | return datafab_write_data(us, info, block, blocks); | |
602 | } | |
603 | ||
604 | if (srb->cmnd[0] == TEST_UNIT_READY) { | |
605 | US_DEBUGP("datafab_transport: TEST_UNIT_READY.\n"); | |
606 | return datafab_id_device(us, info); | |
607 | } | |
608 | ||
609 | if (srb->cmnd[0] == REQUEST_SENSE) { | |
610 | US_DEBUGP("datafab_transport: REQUEST_SENSE. Returning faked response\n"); | |
611 | ||
612 | // this response is pretty bogus right now. eventually if necessary | |
613 | // we can set the correct sense data. so far though it hasn't been | |
614 | // necessary | |
615 | // | |
616 | memset(ptr, 0, 18); | |
617 | ptr[0] = 0xF0; | |
618 | ptr[2] = info->sense_key; | |
619 | ptr[7] = 11; | |
620 | ptr[12] = info->sense_asc; | |
621 | ptr[13] = info->sense_ascq; | |
622 | usb_stor_set_xfer_buf(ptr, 18, srb); | |
623 | ||
624 | return USB_STOR_TRANSPORT_GOOD; | |
625 | } | |
626 | ||
627 | if (srb->cmnd[0] == MODE_SENSE) { | |
628 | US_DEBUGP("datafab_transport: MODE_SENSE_6 detected\n"); | |
629 | return datafab_handle_mode_sense(us, srb, 1); | |
630 | } | |
631 | ||
632 | if (srb->cmnd[0] == MODE_SENSE_10) { | |
633 | US_DEBUGP("datafab_transport: MODE_SENSE_10 detected\n"); | |
634 | return datafab_handle_mode_sense(us, srb, 0); | |
635 | } | |
636 | ||
637 | if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { | |
638 | // sure. whatever. not like we can stop the user from | |
639 | // popping the media out of the device (no locking doors, etc) | |
640 | // | |
641 | return USB_STOR_TRANSPORT_GOOD; | |
642 | } | |
643 | ||
644 | if (srb->cmnd[0] == START_STOP) { | |
645 | /* this is used by sd.c'check_scsidisk_media_change to detect | |
646 | media change */ | |
647 | US_DEBUGP("datafab_transport: START_STOP.\n"); | |
648 | /* the first datafab_id_device after a media change returns | |
649 | an error (determined experimentally) */ | |
650 | rc = datafab_id_device(us, info); | |
651 | if (rc == USB_STOR_TRANSPORT_GOOD) { | |
652 | info->sense_key = NO_SENSE; | |
653 | srb->result = SUCCESS; | |
654 | } else { | |
655 | info->sense_key = UNIT_ATTENTION; | |
656 | srb->result = SAM_STAT_CHECK_CONDITION; | |
657 | } | |
658 | return rc; | |
659 | } | |
660 | ||
661 | US_DEBUGP("datafab_transport: Gah! Unknown command: %d (0x%x)\n", | |
662 | srb->cmnd[0], srb->cmnd[0]); | |
663 | info->sense_key = 0x05; | |
664 | info->sense_asc = 0x20; | |
665 | info->sense_ascq = 0x00; | |
666 | return USB_STOR_TRANSPORT_FAILED; | |
667 | } |