?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
hpt366: fix section mismatch warnings
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / usb / storage / jumpshot.c
blob61097cbb1585047e6893a8f59aec52de4771afdc
1 /* Driver for Lexar "Jumpshot" Compact Flash reader
2 *
3 * $Id: jumpshot.c,v 1.7 2002/02/25 00:40:13 mdharm Exp $
4 *
5 * jumpshot driver v0.1:
6 *
7 * First release
8 *
9 * Current development and maintenance by:
10 * (c) 2000 Jimmie Mayfield (mayfield+usb@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 * Developed with the assistance of:
21 *
22 * (C) 2002 Alan Stern <stern@rowland.org>
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2, or (at your option) any
27 * later version.
28 *
29 * This program is distributed in the hope that it will be useful, but
30 * WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 * General Public License for more details.
33 *
34 * You should have received a copy of the GNU General Public License along
35 * with this program; if not, write to the Free Software Foundation, Inc.,
36 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 */
38
39 /*
40 * This driver attempts to support the Lexar Jumpshot USB CompactFlash
41 * reader. Like many other USB CompactFlash readers, the Jumpshot contains
42 * a USB-to-ATA chip.
43 *
44 * This driver supports reading and writing. If you're truly paranoid,
45 * however, you can force the driver into a write-protected state by setting
46 * the WP enable bits in jumpshot_handle_mode_sense. See the comments
47 * in that routine.
48 */
49
50 #include <linux/errno.h>
51 #include <linux/slab.h>
52
53 #include <scsi/scsi.h>
54 #include <scsi/scsi_cmnd.h>
55
56 #include "usb.h"
57 #include "transport.h"
58 #include "protocol.h"
59 #include "debug.h"
60 #include "jumpshot.h"
61
62
63 static inline int jumpshot_bulk_read(struct us_data *us,
64 unsigned char *data,
65 unsigned int len)
66 {
67 if (len == 0)
68 return USB_STOR_XFER_GOOD;
69
70 US_DEBUGP("jumpshot_bulk_read: len = %d\n", len);
71 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
72 data, len, NULL);
73 }
74
75
76 static inline int jumpshot_bulk_write(struct us_data *us,
77 unsigned char *data,
78 unsigned int len)
79 {
80 if (len == 0)
81 return USB_STOR_XFER_GOOD;
82
83 US_DEBUGP("jumpshot_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 jumpshot_get_status(struct us_data *us)
90 {
91 int rc;
92
93 if (!us)
94 return USB_STOR_TRANSPORT_ERROR;
95
96 // send the setup
97 rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
98 0, 0xA0, 0, 7, us->iobuf, 1);
99
100 if (rc != USB_STOR_XFER_GOOD)
101 return USB_STOR_TRANSPORT_ERROR;
102
103 if (us->iobuf[0] != 0x50) {
104 US_DEBUGP("jumpshot_get_status: 0x%2x\n",
105 us->iobuf[0]);
106 return USB_STOR_TRANSPORT_ERROR;
107 }
108
109 return USB_STOR_TRANSPORT_GOOD;
110 }
111
112 static int jumpshot_read_data(struct us_data *us,
113 struct jumpshot_info *info,
114 u32 sector,
115 u32 sectors)
116 {
117 unsigned char *command = us->iobuf;
118 unsigned char *buffer;
119 unsigned char thistime;
120 unsigned int totallen, alloclen;
121 int len, result;
122 unsigned int sg_offset = 0;
123 struct scatterlist *sg = NULL;
124
125 // we're working in LBA mode. according to the ATA spec,
126 // we can support up to 28-bit addressing. I don't know if Jumpshot
127 // supports beyond 24-bit addressing. It's kind of hard to test
128 // since it requires > 8GB CF card.
129
130 if (sector > 0x0FFFFFFF)
131 return USB_STOR_TRANSPORT_ERROR;
132
133 totallen = sectors * info->ssize;
134
135 // Since we don't read more than 64 KB at a time, we have to create
136 // a bounce buffer and move the data a piece at a time between the
137 // bounce buffer and the actual transfer buffer.
138
139 alloclen = min(totallen, 65536u);
140 buffer = kmalloc(alloclen, GFP_NOIO);
141 if (buffer == NULL)
142 return USB_STOR_TRANSPORT_ERROR;
143
144 do {
145 // loop, never allocate or transfer more than 64k at once
146 // (min(128k, 255*info->ssize) is the real limit)
147 len = min(totallen, alloclen);
148 thistime = (len / info->ssize) & 0xff;
149
150 command[0] = 0;
151 command[1] = thistime;
152 command[2] = sector & 0xFF;
153 command[3] = (sector >> 8) & 0xFF;
154 command[4] = (sector >> 16) & 0xFF;
155
156 command[5] = 0xE0 | ((sector >> 24) & 0x0F);
157 command[6] = 0x20;
158
159 // send the setup + command
160 result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
161 0, 0x20, 0, 1, command, 7);
162 if (result != USB_STOR_XFER_GOOD)
163 goto leave;
164
165 // read the result
166 result = jumpshot_bulk_read(us, buffer, len);
167 if (result != USB_STOR_XFER_GOOD)
168 goto leave;
169
170 US_DEBUGP("jumpshot_read_data: %d bytes\n", len);
171
172 // Store the data in the transfer buffer
173 usb_stor_access_xfer_buf(buffer, len, us->srb,
174 &sg, &sg_offset, TO_XFER_BUF);
175
176 sector += thistime;
177 totallen -= len;
178 } while (totallen > 0);
179
180 kfree(buffer);
181 return USB_STOR_TRANSPORT_GOOD;
182
183 leave:
184 kfree(buffer);
185 return USB_STOR_TRANSPORT_ERROR;
186 }
187
188
189 static int jumpshot_write_data(struct us_data *us,
190 struct jumpshot_info *info,
191 u32 sector,
192 u32 sectors)
193 {
194 unsigned char *command = us->iobuf;
195 unsigned char *buffer;
196 unsigned char thistime;
197 unsigned int totallen, alloclen;
198 int len, result, waitcount;
199 unsigned int sg_offset = 0;
200 struct scatterlist *sg = NULL;
201
202 // we're working in LBA mode. according to the ATA spec,
203 // we can support up to 28-bit addressing. I don't know if Jumpshot
204 // supports beyond 24-bit addressing. It's kind of hard to test
205 // since it requires > 8GB CF card.
206 //
207 if (sector > 0x0FFFFFFF)
208 return USB_STOR_TRANSPORT_ERROR;
209
210 totallen = sectors * info->ssize;
211
212 // Since we don't write more than 64 KB at a time, we have to create
213 // a bounce buffer and move the data a piece at a time between the
214 // bounce buffer and the actual transfer buffer.
215
216 alloclen = min(totallen, 65536u);
217 buffer = kmalloc(alloclen, GFP_NOIO);
218 if (buffer == NULL)
219 return USB_STOR_TRANSPORT_ERROR;
220
221 do {
222 // loop, never allocate or transfer more than 64k at once
223 // (min(128k, 255*info->ssize) is the real limit)
224
225 len = min(totallen, alloclen);
226 thistime = (len / info->ssize) & 0xff;
227
228 // Get the data from the transfer buffer
229 usb_stor_access_xfer_buf(buffer, len, us->srb,
230 &sg, &sg_offset, FROM_XFER_BUF);
231
232 command[0] = 0;
233 command[1] = thistime;
234 command[2] = sector & 0xFF;
235 command[3] = (sector >> 8) & 0xFF;
236 command[4] = (sector >> 16) & 0xFF;
237
238 command[5] = 0xE0 | ((sector >> 24) & 0x0F);
239 command[6] = 0x30;
240
241 // send the setup + command
242 result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
243 0, 0x20, 0, 1, command, 7);
244 if (result != USB_STOR_XFER_GOOD)
245 goto leave;
246
247 // send the data
248 result = jumpshot_bulk_write(us, buffer, len);
249 if (result != USB_STOR_XFER_GOOD)
250 goto leave;
251
252 // read the result. apparently the bulk write can complete
253 // before the jumpshot drive is finished writing. so we loop
254 // here until we get a good return code
255 waitcount = 0;
256 do {
257 result = jumpshot_get_status(us);
258 if (result != USB_STOR_TRANSPORT_GOOD) {
259 // I have not experimented to find the smallest value.
260 //
261 msleep(50);
262 }
263 } while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));
264
265 if (result != USB_STOR_TRANSPORT_GOOD)
266 US_DEBUGP("jumpshot_write_data: Gah! Waitcount = 10. Bad write!?\n");
267
268 sector += thistime;
269 totallen -= len;
270 } while (totallen > 0);
271
272 kfree(buffer);
273 return result;
274
275 leave:
276 kfree(buffer);
277 return USB_STOR_TRANSPORT_ERROR;
278 }
279
280 static int jumpshot_id_device(struct us_data *us,
281 struct jumpshot_info *info)
282 {
283 unsigned char *command = us->iobuf;
284 unsigned char *reply;
285 int rc;
286
287 if (!us || !info)
288 return USB_STOR_TRANSPORT_ERROR;
289
290 command[0] = 0xE0;
291 command[1] = 0xEC;
292 reply = kmalloc(512, GFP_NOIO);
293 if (!reply)
294 return USB_STOR_TRANSPORT_ERROR;
295
296 // send the setup
297 rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
298 0, 0x20, 0, 6, command, 2);
299
300 if (rc != USB_STOR_XFER_GOOD) {
301 US_DEBUGP("jumpshot_id_device: Gah! "
302 "send_control for read_capacity failed\n");
303 rc = USB_STOR_TRANSPORT_ERROR;
304 goto leave;
305 }
306
307 // read the reply
308 rc = jumpshot_bulk_read(us, reply, 512);
309 if (rc != USB_STOR_XFER_GOOD) {
310 rc = USB_STOR_TRANSPORT_ERROR;
311 goto leave;
312 }
313
314 info->sectors = ((u32)(reply[117]) << 24) |
315 ((u32)(reply[116]) << 16) |
316 ((u32)(reply[115]) << 8) |
317 ((u32)(reply[114]) );
318
319 rc = USB_STOR_TRANSPORT_GOOD;
320
321 leave:
322 kfree(reply);
323 return rc;
324 }
325
326 static int jumpshot_handle_mode_sense(struct us_data *us,
327 struct scsi_cmnd * srb,
328 int sense_6)
329 {
330 static unsigned char rw_err_page[12] = {
331 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
332 };
333 static unsigned char cache_page[12] = {
334 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
335 };
336 static unsigned char rbac_page[12] = {
337 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
338 };
339 static unsigned char timer_page[8] = {
340 0x1C, 0x6, 0, 0, 0, 0
341 };
342 unsigned char pc, page_code;
343 unsigned int i = 0;
344 struct jumpshot_info *info = (struct jumpshot_info *) (us->extra);
345 unsigned char *ptr = us->iobuf;
346
347 pc = srb->cmnd[2] >> 6;
348 page_code = srb->cmnd[2] & 0x3F;
349
350 switch (pc) {
351 case 0x0:
352 US_DEBUGP("jumpshot_handle_mode_sense: Current values\n");
353 break;
354 case 0x1:
355 US_DEBUGP("jumpshot_handle_mode_sense: Changeable values\n");
356 break;
357 case 0x2:
358 US_DEBUGP("jumpshot_handle_mode_sense: Default values\n");
359 break;
360 case 0x3:
361 US_DEBUGP("jumpshot_handle_mode_sense: Saves values\n");
362 break;
363 }
364
365 memset(ptr, 0, 8);
366 if (sense_6) {
367 ptr[2] = 0x00; // WP enable: 0x80
368 i = 4;
369 } else {
370 ptr[3] = 0x00; // WP enable: 0x80
371 i = 8;
372 }
373
374 switch (page_code) {
375 case 0x0:
376 // vendor-specific mode
377 info->sense_key = 0x05;
378 info->sense_asc = 0x24;
379 info->sense_ascq = 0x00;
380 return USB_STOR_TRANSPORT_FAILED;
381
382 case 0x1:
383 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
384 i += sizeof(rw_err_page);
385 break;
386
387 case 0x8:
388 memcpy(ptr + i, cache_page, sizeof(cache_page));
389 i += sizeof(cache_page);
390 break;
391
392 case 0x1B:
393 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
394 i += sizeof(rbac_page);
395 break;
396
397 case 0x1C:
398 memcpy(ptr + i, timer_page, sizeof(timer_page));
399 i += sizeof(timer_page);
400 break;
401
402 case 0x3F:
403 memcpy(ptr + i, timer_page, sizeof(timer_page));
404 i += sizeof(timer_page);
405 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
406 i += sizeof(rbac_page);
407 memcpy(ptr + i, cache_page, sizeof(cache_page));
408 i += sizeof(cache_page);
409 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
410 i += sizeof(rw_err_page);
411 break;
412 }
413
414 if (sense_6)
415 ptr[0] = i - 1;
416 else
417 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
418 usb_stor_set_xfer_buf(ptr, i, srb);
419
420 return USB_STOR_TRANSPORT_GOOD;
421 }
422
423
424 static void jumpshot_info_destructor(void *extra)
425 {
426 // this routine is a placeholder...
427 // currently, we don't allocate any extra blocks so we're okay
428 }
429
430
431
432 // Transport for the Lexar 'Jumpshot'
433 //
434 int jumpshot_transport(struct scsi_cmnd * srb, struct us_data *us)
435 {
436 struct jumpshot_info *info;
437 int rc;
438 unsigned long block, blocks;
439 unsigned char *ptr = us->iobuf;
440 static unsigned char inquiry_response[8] = {
441 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
442 };
443
444 if (!us->extra) {
445 us->extra = kzalloc(sizeof(struct jumpshot_info), GFP_NOIO);
446 if (!us->extra) {
447 US_DEBUGP("jumpshot_transport: Gah! Can't allocate storage for jumpshot info struct!\n");
448 return USB_STOR_TRANSPORT_ERROR;
449 }
450 us->extra_destructor = jumpshot_info_destructor;
451 }
452
453 info = (struct jumpshot_info *) (us->extra);
454
455 if (srb->cmnd[0] == INQUIRY) {
456 US_DEBUGP("jumpshot_transport: INQUIRY. Returning bogus response.\n");
457 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
458 fill_inquiry_response(us, ptr, 36);
459 return USB_STOR_TRANSPORT_GOOD;
460 }
461
462 if (srb->cmnd[0] == READ_CAPACITY) {
463 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
464
465 rc = jumpshot_get_status(us);
466 if (rc != USB_STOR_TRANSPORT_GOOD)
467 return rc;
468
469 rc = jumpshot_id_device(us, info);
470 if (rc != USB_STOR_TRANSPORT_GOOD)
471 return rc;
472
473 US_DEBUGP("jumpshot_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
474 info->sectors, info->ssize);
475
476 // build the reply
477 //
478 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
479 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
480 usb_stor_set_xfer_buf(ptr, 8, srb);
481
482 return USB_STOR_TRANSPORT_GOOD;
483 }
484
485 if (srb->cmnd[0] == MODE_SELECT_10) {
486 US_DEBUGP("jumpshot_transport: Gah! MODE_SELECT_10.\n");
487 return USB_STOR_TRANSPORT_ERROR;
488 }
489
490 if (srb->cmnd[0] == READ_10) {
491 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
492 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
493
494 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
495
496 US_DEBUGP("jumpshot_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
497 return jumpshot_read_data(us, info, block, blocks);
498 }
499
500 if (srb->cmnd[0] == READ_12) {
501 // I don't think we'll ever see a READ_12 but support it anyway...
502 //
503 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
504 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
505
506 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
507 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
508
509 US_DEBUGP("jumpshot_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
510 return jumpshot_read_data(us, info, block, blocks);
511 }
512
513 if (srb->cmnd[0] == WRITE_10) {
514 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
515 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
516
517 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
518
519 US_DEBUGP("jumpshot_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
520 return jumpshot_write_data(us, info, block, blocks);
521 }
522
523 if (srb->cmnd[0] == WRITE_12) {
524 // I don't think we'll ever see a WRITE_12 but support it anyway...
525 //
526 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
527 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
528
529 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
530 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
531
532 US_DEBUGP("jumpshot_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
533 return jumpshot_write_data(us, info, block, blocks);
534 }
535
536
537 if (srb->cmnd[0] == TEST_UNIT_READY) {
538 US_DEBUGP("jumpshot_transport: TEST_UNIT_READY.\n");
539 return jumpshot_get_status(us);
540 }
541
542 if (srb->cmnd[0] == REQUEST_SENSE) {
543 US_DEBUGP("jumpshot_transport: REQUEST_SENSE.\n");
544
545 memset(ptr, 0, 18);
546 ptr[0] = 0xF0;
547 ptr[2] = info->sense_key;
548 ptr[7] = 11;
549 ptr[12] = info->sense_asc;
550 ptr[13] = info->sense_ascq;
551 usb_stor_set_xfer_buf(ptr, 18, srb);
552
553 return USB_STOR_TRANSPORT_GOOD;
554 }
555
556 if (srb->cmnd[0] == MODE_SENSE) {
557 US_DEBUGP("jumpshot_transport: MODE_SENSE_6 detected\n");
558 return jumpshot_handle_mode_sense(us, srb, 1);
559 }
560
561 if (srb->cmnd[0] == MODE_SENSE_10) {
562 US_DEBUGP("jumpshot_transport: MODE_SENSE_10 detected\n");
563 return jumpshot_handle_mode_sense(us, srb, 0);
564 }
565
566 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
567 // sure. whatever. not like we can stop the user from popping
568 // the media out of the device (no locking doors, etc)
569 //
570 return USB_STOR_TRANSPORT_GOOD;
571 }
572
573 if (srb->cmnd[0] == START_STOP) {
574 /* this is used by sd.c'check_scsidisk_media_change to detect
575 media change */
576 US_DEBUGP("jumpshot_transport: START_STOP.\n");
577 /* the first jumpshot_id_device after a media change returns
578 an error (determined experimentally) */
579 rc = jumpshot_id_device(us, info);
580 if (rc == USB_STOR_TRANSPORT_GOOD) {
581 info->sense_key = NO_SENSE;
582 srb->result = SUCCESS;
583 } else {
584 info->sense_key = UNIT_ATTENTION;
585 srb->result = SAM_STAT_CHECK_CONDITION;
586 }
587 return rc;
588 }
589
590 US_DEBUGP("jumpshot_transport: Gah! Unknown command: %d (0x%x)\n",
591 srb->cmnd[0], srb->cmnd[0]);
592 info->sense_key = 0x05;
593 info->sense_asc = 0x20;
594 info->sense_ascq = 0x00;
595 return USB_STOR_TRANSPORT_FAILED;
596 }
Community contributions to the Openmoko Kernel