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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[deliverable/linux.git] / drivers / usb / storage / shuttle_usbat.c
CommitLineData
b7b1e655 1/* Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable
1da177e4
LT		 2 *
3 * $Id: shuttle_usbat.c,v 1.17 2002/04/22 03:39:43 mdharm Exp $
4 *
5 * Current development and maintenance by:
6 * (c) 2000, 2001 Robert Baruch (autophile@starband.net)
7 * (c) 2004, 2005 Daniel Drake <dsd@gentoo.org>
8 *
9 * Developed with the assistance of:
10 * (c) 2002 Alan Stern <stern@rowland.org>
11 *
12 * Flash support based on earlier work by:
13 * (c) 2002 Thomas Kreiling <usbdev@sm04.de>
14 *
15 * Many originally ATAPI devices were slightly modified to meet the USB
16 * market by using some kind of translation from ATAPI to USB on the host,
17 * and the peripheral would translate from USB back to ATAPI.
18 *
19 * SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only,
20 * which does the USB-to-ATAPI conversion. By obtaining the data sheet on
21 * their device under nondisclosure agreement, I have been able to write
22 * this driver for Linux.
23 *
24 * The chip used in the device can also be used for EPP and ISA translation
25 * as well. This driver is only guaranteed to work with the ATAPI
26 * translation.
27 *
28 * See the Kconfig help text for a list of devices known to be supported by
29 * this driver.
30 *
31 * This program is free software; you can redistribute it and/or modify it
32 * under the terms of the GNU General Public License as published by the
33 * Free Software Foundation; either version 2, or (at your option) any
34 * later version.
35 *
36 * This program is distributed in the hope that it will be useful, but
37 * WITHOUT ANY WARRANTY; without even the implied warranty of
38 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
39 * General Public License for more details.
40 *
41 * You should have received a copy of the GNU General Public License along
42 * with this program; if not, write to the Free Software Foundation, Inc.,
43 * 675 Mass Ave, Cambridge, MA 02139, USA.
44 */
45
1da177e4
LT		 46#include <linux/errno.h>
47#include <linux/slab.h>
48#include <linux/cdrom.h>
49
50#include <scsi/scsi.h>
51#include <scsi/scsi_cmnd.h>
52
53#include "usb.h"
54#include "transport.h"
55#include "protocol.h"
56#include "debug.h"
57#include "shuttle_usbat.h"
58
59#define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
60#define LSB_of(s) ((s)&0xFF)
61#define MSB_of(s) ((s)>>8)
62
63static int transferred = 0;
64
65static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
66static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
67
68/*
b7b1e655 69 * Convenience function to produce an ATA read/write sectors command
1da177e4
LT		 70 * Use cmd=0x20 for read, cmd=0x30 for write
71 */
b7b1e655 72static void usbat_pack_ata_sector_cmd(unsigned char *buf,
1da177e4
LT		 73 unsigned char thistime,
74 u32 sector, unsigned char cmd)
75{
76 buf[0] = 0;
77 buf[1] = thistime;
78 buf[2] = sector & 0xFF;
79 buf[3] = (sector >> 8) & 0xFF;
80 buf[4] = (sector >> 16) & 0xFF;
81 buf[5] = 0xE0 | ((sector >> 24) & 0x0F);
82 buf[6] = cmd;
83}
84
85/*
86 * Convenience function to get the device type (flash or hp8200)
87 */
88static int usbat_get_device_type(struct us_data *us)
89{
90 return ((struct usbat_info*)us->extra)->devicetype;
91}
92
93/*
94 * Read a register from the device
95 */
96static int usbat_read(struct us_data *us,
97 unsigned char access,
98 unsigned char reg,
99 unsigned char *content)
100{
101 return usb_stor_ctrl_transfer(us,
102 us->recv_ctrl_pipe,
103 access | USBAT_CMD_READ_REG,
104 0xC0,
105 (u16)reg,
106 0,
107 content,
108 1);
109}
110
111/*
112 * Write to a register on the device
113 */
114static int usbat_write(struct us_data *us,
115 unsigned char access,
116 unsigned char reg,
117 unsigned char content)
118{
119 return usb_stor_ctrl_transfer(us,
120 us->send_ctrl_pipe,
121 access | USBAT_CMD_WRITE_REG,
122 0x40,
123 short_pack(reg, content),
124 0,
125 NULL,
126 0);
127}
128
129/*
130 * Convenience function to perform a bulk read
131 */
132static int usbat_bulk_read(struct us_data *us,
141804d4
PC		 133 unsigned char *data,
134 unsigned int len,
135 int use_sg)
1da177e4
LT		 136{
137 if (len == 0)
138 return USB_STOR_XFER_GOOD;
139
140 US_DEBUGP("usbat_bulk_read: len = %d\n", len);
141804d4 141 return usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe, data, len, use_sg, NULL);
1da177e4
LT		 142}
143
144/*
145 * Convenience function to perform a bulk write
146 */
147static int usbat_bulk_write(struct us_data *us,
141804d4
PC		 148 unsigned char *data,
149 unsigned int len,
150 int use_sg)
1da177e4
LT		 151{
152 if (len == 0)
153 return USB_STOR_XFER_GOOD;
154
155 US_DEBUGP("usbat_bulk_write: len = %d\n", len);
141804d4 156 return usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe, data, len, use_sg, NULL);
1da177e4
LT		 157}
158
159/*
160 * Some USBAT-specific commands can only be executed over a command transport
161 * This transport allows one (len=8) or two (len=16) vendor-specific commands
162 * to be executed.
163 */
164static int usbat_execute_command(struct us_data *us,
165 unsigned char *commands,
166 unsigned int len)
167{
168 return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
169 USBAT_CMD_EXEC_CMD, 0x40, 0, 0,
170 commands, len);
171}
172
173/*
174 * Read the status register
175 */
176static int usbat_get_status(struct us_data *us, unsigned char *status)
177{
178 int rc;
179 rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status);
180
181 US_DEBUGP("usbat_get_status: 0x%02X\n", (unsigned short) (*status));
182 return rc;
183}
184
185/*
186 * Check the device status
187 */
188static int usbat_check_status(struct us_data *us)
189{
190 unsigned char *reply = us->iobuf;
191 int rc;
192
1da177e4
LT		 193 rc = usbat_get_status(us, reply);
194 if (rc != USB_STOR_XFER_GOOD)
195 return USB_STOR_TRANSPORT_FAILED;
196
b7b1e655
DD		 197 /* error/check condition (0x51 is ok) */
198 if (*reply & 0x01 && *reply != 0x51)
1da177e4
LT		 199 return USB_STOR_TRANSPORT_FAILED;
200
b7b1e655
DD		 201 /* device fault */
202 if (*reply & 0x20)
1da177e4
LT		 203 return USB_STOR_TRANSPORT_FAILED;
204
205 return USB_STOR_TRANSPORT_GOOD;
206}
207
208/*
209 * Stores critical information in internal registers in prepartion for the execution
210 * of a conditional usbat_read_blocks or usbat_write_blocks call.
211 */
212static int usbat_set_shuttle_features(struct us_data *us,
213 unsigned char external_trigger,
214 unsigned char epp_control,
215 unsigned char mask_byte,
216 unsigned char test_pattern,
217 unsigned char subcountH,
218 unsigned char subcountL)
219{
220 unsigned char *command = us->iobuf;
221
222 command[0] = 0x40;
223 command[1] = USBAT_CMD_SET_FEAT;
224
b7b1e655
DD		 225 /*
226 * The only bit relevant to ATA access is bit 6
227 * which defines 8 bit data access (set) or 16 bit (unset)
228 */
1da177e4
LT		 229 command[2] = epp_control;
230
b7b1e655
DD		 231 /*
232 * If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
233 * ET1 and ET2 define an external event to be checked for on event of a
234 * _read_blocks or _write_blocks operation. The read/write will not take
235 * place unless the defined trigger signal is active.
236 */
1da177e4
LT		 237 command[3] = external_trigger;
238
b7b1e655
DD		 239 /*
240 * The resultant byte of the mask operation (see mask_byte) is compared for
241 * equivalence with this test pattern. If equal, the read/write will take
242 * place.
243 */
1da177e4
LT		 244 command[4] = test_pattern;
245
b7b1e655
DD		 246 /*
247 * This value is logically ANDed with the status register field specified
248 * in the read/write command.
249 */
1da177e4
LT		 250 command[5] = mask_byte;
251
b7b1e655
DD		 252 /*
253 * If ALQ is set in the qualifier, this field contains the address of the
254 * registers where the byte count should be read for transferring the data.
255 * If ALQ is not set, then this field contains the number of bytes to be
256 * transferred.
257 */
1da177e4
LT		 258 command[6] = subcountL;
259 command[7] = subcountH;
260
261 return usbat_execute_command(us, command, 8);
262}
263
264/*
265 * Block, waiting for an ATA device to become not busy or to report
266 * an error condition.
267 */
268static int usbat_wait_not_busy(struct us_data *us, int minutes)
269{
270 int i;
271 int result;
272 unsigned char *status = us->iobuf;
273
274 /* Synchronizing cache on a CDR could take a heck of a long time,
275 * but probably not more than 10 minutes or so. On the other hand,
276 * doing a full blank on a CDRW at speed 1 will take about 75
277 * minutes!
278 */
279
280 for (i=0; i<1200+minutes*60; i++) {
281
282 result = usbat_get_status(us, status);
283
284 if (result!=USB_STOR_XFER_GOOD)
285 return USB_STOR_TRANSPORT_ERROR;
b7b1e655 286 if (*status & 0x01) { /* check condition */
1da177e4
LT		 287 result = usbat_read(us, USBAT_ATA, 0x10, status);
288 return USB_STOR_TRANSPORT_FAILED;
289 }
b7b1e655 290 if (*status & 0x20) /* device fault */
1da177e4
LT		 291 return USB_STOR_TRANSPORT_FAILED;
292
b7b1e655 293 if ((*status & 0x80)==0x00) { /* not busy */
1da177e4
LT		 294 US_DEBUGP("Waited not busy for %d steps\n", i);
295 return USB_STOR_TRANSPORT_GOOD;
296 }
297
298 if (i<500)
b7b1e655 299 msleep(10); /* 5 seconds */
1da177e4 300 else if (i<700)
b7b1e655 301 msleep(50); /* 10 seconds */
1da177e4 302 else if (i<1200)
b7b1e655 303 msleep(100); /* 50 seconds */
1da177e4 304 else
b7b1e655 305 msleep(1000); /* X minutes */
1da177e4
LT		 306 }
307
308 US_DEBUGP("Waited not busy for %d minutes, timing out.\n",
309 minutes);
310 return USB_STOR_TRANSPORT_FAILED;
311}
312
313/*
314 * Read block data from the data register
315 */
316static int usbat_read_block(struct us_data *us,
317 unsigned char *content,
141804d4
PC		 318 unsigned short len,
319 int use_sg)
1da177e4
LT		 320{
321 int result;
322 unsigned char *command = us->iobuf;
323
324 if (!len)
325 return USB_STOR_TRANSPORT_GOOD;
326
327 command[0] = 0xC0;
328 command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK;
329 command[2] = USBAT_ATA_DATA;
330 command[3] = 0;
331 command[4] = 0;
332 command[5] = 0;
333 command[6] = LSB_of(len);
334 command[7] = MSB_of(len);
335
336 result = usbat_execute_command(us, command, 8);
337 if (result != USB_STOR_XFER_GOOD)
338 return USB_STOR_TRANSPORT_ERROR;
339
141804d4 340 result = usbat_bulk_read(us, content, len, use_sg);
1da177e4
LT		 341 return (result == USB_STOR_XFER_GOOD ?
342 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
343}
344
345/*
346 * Write block data via the data register
347 */
348static int usbat_write_block(struct us_data *us,
349 unsigned char access,
350 unsigned char *content,
351 unsigned short len,
141804d4
PC		 352 int minutes,
353 int use_sg)
1da177e4
LT		 354{
355 int result;
356 unsigned char *command = us->iobuf;
357
358 if (!len)
359 return USB_STOR_TRANSPORT_GOOD;
360
361 command[0] = 0x40;
362 command[1] = access | USBAT_CMD_WRITE_BLOCK;
363 command[2] = USBAT_ATA_DATA;
364 command[3] = 0;
365 command[4] = 0;
366 command[5] = 0;
367 command[6] = LSB_of(len);
368 command[7] = MSB_of(len);
369
370 result = usbat_execute_command(us, command, 8);
371
372 if (result != USB_STOR_XFER_GOOD)
373 return USB_STOR_TRANSPORT_ERROR;
374
141804d4 375 result = usbat_bulk_write(us, content, len, use_sg);
1da177e4
LT		 376 if (result != USB_STOR_XFER_GOOD)
377 return USB_STOR_TRANSPORT_ERROR;
378
379 return usbat_wait_not_busy(us, minutes);
380}
381
382/*
383 * Process read and write requests
384 */
385static int usbat_hp8200e_rw_block_test(struct us_data *us,
386 unsigned char access,
387 unsigned char *registers,
388 unsigned char *data_out,
389 unsigned short num_registers,
390 unsigned char data_reg,
391 unsigned char status_reg,
392 unsigned char timeout,
393 unsigned char qualifier,
394 int direction,
395 unsigned char *content,
396 unsigned short len,
397 int use_sg,
398 int minutes)
399{
400 int result;
401 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
402 us->recv_bulk_pipe : us->send_bulk_pipe;
403
404 unsigned char *command = us->iobuf;
405 int i, j;
406 int cmdlen;
407 unsigned char *data = us->iobuf;
408 unsigned char *status = us->iobuf;
409
410 BUG_ON(num_registers > US_IOBUF_SIZE/2);
411
412 for (i=0; i<20; i++) {
413
414 /*
415 * The first time we send the full command, which consists
416 * of downloading the SCSI command followed by downloading
417 * the data via a write-and-test. Any other time we only
418 * send the command to download the data -- the SCSI command
419 * is still 'active' in some sense in the device.
420 *
421 * We're only going to try sending the data 10 times. After
422 * that, we just return a failure.
423 */
424
425 if (i==0) {
426 cmdlen = 16;
b7b1e655
DD		 427 /*
428 * Write to multiple registers
429 * Not really sure the 0x07, 0x17, 0xfc, 0xe7 is
430 * necessary here, but that's what came out of the
431 * trace every single time.
432 */
1da177e4
LT		 433 command[0] = 0x40;
434 command[1] = access | USBAT_CMD_WRITE_REGS;
435 command[2] = 0x07;
436 command[3] = 0x17;
437 command[4] = 0xFC;
438 command[5] = 0xE7;
439 command[6] = LSB_of(num_registers*2);
440 command[7] = MSB_of(num_registers*2);
441 } else
442 cmdlen = 8;
443
b7b1e655 444 /* Conditionally read or write blocks */
1da177e4
LT		 445 command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
446 command[cmdlen-7] = access |
447 (direction==DMA_TO_DEVICE ?
448 USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK);
449 command[cmdlen-6] = data_reg;
450 command[cmdlen-5] = status_reg;
451 command[cmdlen-4] = timeout;
452 command[cmdlen-3] = qualifier;
453 command[cmdlen-2] = LSB_of(len);
454 command[cmdlen-1] = MSB_of(len);
455
456 result = usbat_execute_command(us, command, cmdlen);
457
458 if (result != USB_STOR_XFER_GOOD)
459 return USB_STOR_TRANSPORT_ERROR;
460
461 if (i==0) {
462
463 for (j=0; j<num_registers; j++) {
464 data[j<<1] = registers[j];
465 data[1+(j<<1)] = data_out[j];
466 }
467
141804d4 468 result = usbat_bulk_write(us, data, num_registers*2, 0);
1da177e4
LT		 469 if (result != USB_STOR_XFER_GOOD)
470 return USB_STOR_TRANSPORT_ERROR;
471
472 }
473
1da177e4
LT		 474 result = usb_stor_bulk_transfer_sg(us,
475 pipe, content, len, use_sg, NULL);
476
477 /*
478 * If we get a stall on the bulk download, we'll retry
479 * the bulk download -- but not the SCSI command because
480 * in some sense the SCSI command is still 'active' and
481 * waiting for the data. Don't ask me why this should be;
482 * I'm only following what the Windoze driver did.
483 *
484 * Note that a stall for the test-and-read/write command means
485 * that the test failed. In this case we're testing to make
486 * sure that the device is error-free
487 * (i.e. bit 0 -- CHK -- of status is 0). The most likely
488 * hypothesis is that the USBAT chip somehow knows what
489 * the device will accept, but doesn't give the device any
490 * data until all data is received. Thus, the device would
491 * still be waiting for the first byte of data if a stall
492 * occurs, even if the stall implies that some data was
493 * transferred.
494 */
495
496 if (result == USB_STOR_XFER_SHORT ||
497 result == USB_STOR_XFER_STALLED) {
498
499 /*
500 * If we're reading and we stalled, then clear
501 * the bulk output pipe only the first time.
502 */
503
504 if (direction==DMA_FROM_DEVICE && i==0) {
505 if (usb_stor_clear_halt(us,
506 us->send_bulk_pipe) < 0)
507 return USB_STOR_TRANSPORT_ERROR;
508 }
509
510 /*
511 * Read status: is the device angry, or just busy?
512 */
513
514 result = usbat_read(us, USBAT_ATA,
515 direction==DMA_TO_DEVICE ?
516 USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS,
517 status);
518
519 if (result!=USB_STOR_XFER_GOOD)
520 return USB_STOR_TRANSPORT_ERROR;
b7b1e655 521 if (*status & 0x01) /* check condition */
1da177e4 522 return USB_STOR_TRANSPORT_FAILED;
b7b1e655 523 if (*status & 0x20) /* device fault */
1da177e4
LT		 524 return USB_STOR_TRANSPORT_FAILED;
525
526 US_DEBUGP("Redoing %s\n",
527 direction==DMA_TO_DEVICE ? "write" : "read");
528
529 } else if (result != USB_STOR_XFER_GOOD)
530 return USB_STOR_TRANSPORT_ERROR;
531 else
532 return usbat_wait_not_busy(us, minutes);
533
534 }
535
536 US_DEBUGP("Bummer! %s bulk data 20 times failed.\n",
537 direction==DMA_TO_DEVICE ? "Writing" : "Reading");
538
539 return USB_STOR_TRANSPORT_FAILED;
540}
541
542/*
543 * Write to multiple registers:
544 * Allows us to write specific data to any registers. The data to be written
545 * gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN
546 * which gets sent through bulk out.
547 * Not designed for large transfers of data!
548 */
549static int usbat_multiple_write(struct us_data *us,
550 unsigned char *registers,
551 unsigned char *data_out,
552 unsigned short num_registers)
553{
554 int i, result;
555 unsigned char *data = us->iobuf;
556 unsigned char *command = us->iobuf;
557
558 BUG_ON(num_registers > US_IOBUF_SIZE/2);
559
b7b1e655 560 /* Write to multiple registers, ATA access */
1da177e4
LT		 561 command[0] = 0x40;
562 command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
563
b7b1e655 564 /* No relevance */
1da177e4
LT		 565 command[2] = 0;
566 command[3] = 0;
567 command[4] = 0;
568 command[5] = 0;
569
b7b1e655 570 /* Number of bytes to be transferred (incl. addresses and data) */
1da177e4
LT		 571 command[6] = LSB_of(num_registers*2);
572 command[7] = MSB_of(num_registers*2);
573
b7b1e655 574 /* The setup command */
1da177e4
LT		 575 result = usbat_execute_command(us, command, 8);
576 if (result != USB_STOR_XFER_GOOD)
577 return USB_STOR_TRANSPORT_ERROR;
578
b7b1e655 579 /* Create the reg/data, reg/data sequence */
1da177e4
LT		 580 for (i=0; i<num_registers; i++) {
581 data[i<<1] = registers[i];
582 data[1+(i<<1)] = data_out[i];
583 }
584
b7b1e655 585 /* Send the data */
141804d4 586 result = usbat_bulk_write(us, data, num_registers*2, 0);
1da177e4
LT		 587 if (result != USB_STOR_XFER_GOOD)
588 return USB_STOR_TRANSPORT_ERROR;
589
590 if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
591 return usbat_wait_not_busy(us, 0);
592 else
593 return USB_STOR_TRANSPORT_GOOD;
594}
595
596/*
597 * Conditionally read blocks from device:
598 * Allows us to read blocks from a specific data register, based upon the
599 * condition that a status register can be successfully masked with a status
600 * qualifier. If this condition is not initially met, the read will wait
601 * up until a maximum amount of time has elapsed, as specified by timeout.
602 * The read will start when the condition is met, otherwise the command aborts.
603 *
604 * The qualifier defined here is not the value that is masked, it defines
605 * conditions for the write to take place. The actual masked qualifier (and
606 * other related details) are defined beforehand with _set_shuttle_features().
607 */
608static int usbat_read_blocks(struct us_data *us,
141804d4
PC		 609 unsigned char *buffer,
610 int len,
611 int use_sg)
1da177e4
LT		 612{
613 int result;
614 unsigned char *command = us->iobuf;
615
616 command[0] = 0xC0;
617 command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
618 command[2] = USBAT_ATA_DATA;
619 command[3] = USBAT_ATA_STATUS;
b7b1e655 620 command[4] = 0xFD; /* Timeout (ms); */
1da177e4
LT		 621 command[5] = USBAT_QUAL_FCQ;
622 command[6] = LSB_of(len);
623 command[7] = MSB_of(len);
624
b7b1e655 625 /* Multiple block read setup command */
1da177e4
LT		 626 result = usbat_execute_command(us, command, 8);
627 if (result != USB_STOR_XFER_GOOD)
628 return USB_STOR_TRANSPORT_FAILED;
629
b7b1e655 630 /* Read the blocks we just asked for */
141804d4 631 result = usbat_bulk_read(us, buffer, len, use_sg);
1da177e4
LT		 632 if (result != USB_STOR_XFER_GOOD)
633 return USB_STOR_TRANSPORT_FAILED;
634
635 return USB_STOR_TRANSPORT_GOOD;
636}
637
638/*
639 * Conditionally write blocks to device:
640 * Allows us to write blocks to a specific data register, based upon the
641 * condition that a status register can be successfully masked with a status
642 * qualifier. If this condition is not initially met, the write will wait
643 * up until a maximum amount of time has elapsed, as specified by timeout.
644 * The read will start when the condition is met, otherwise the command aborts.
645 *
646 * The qualifier defined here is not the value that is masked, it defines
647 * conditions for the write to take place. The actual masked qualifier (and
648 * other related details) are defined beforehand with _set_shuttle_features().
649 */
650static int usbat_write_blocks(struct us_data *us,
651 unsigned char *buffer,
141804d4
PC		 652 int len,
653 int use_sg)
1da177e4
LT		 654{
655 int result;
656 unsigned char *command = us->iobuf;
657
658 command[0] = 0x40;
659 command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
660 command[2] = USBAT_ATA_DATA;
661 command[3] = USBAT_ATA_STATUS;
b7b1e655 662 command[4] = 0xFD; /* Timeout (ms) */
1da177e4
LT		 663 command[5] = USBAT_QUAL_FCQ;
664 command[6] = LSB_of(len);
665 command[7] = MSB_of(len);
666
b7b1e655 667 /* Multiple block write setup command */
1da177e4
LT		 668 result = usbat_execute_command(us, command, 8);
669 if (result != USB_STOR_XFER_GOOD)
670 return USB_STOR_TRANSPORT_FAILED;
671
b7b1e655 672 /* Write the data */
141804d4 673 result = usbat_bulk_write(us, buffer, len, use_sg);
1da177e4
LT		 674 if (result != USB_STOR_XFER_GOOD)
675 return USB_STOR_TRANSPORT_FAILED;
676
677 return USB_STOR_TRANSPORT_GOOD;
678}
679
680/*
681 * Read the User IO register
682 */
683static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
684{
685 int result;
686
687 result = usb_stor_ctrl_transfer(us,
688 us->recv_ctrl_pipe,
689 USBAT_CMD_UIO,
690 0xC0,
691 0,
692 0,
693 data_flags,
694 USBAT_UIO_READ);
695
696 US_DEBUGP("usbat_read_user_io: UIO register reads %02X\n", (unsigned short) (*data_flags));
697
698 return result;
699}
700
701/*
702 * Write to the User IO register
703 */
704static int usbat_write_user_io(struct us_data *us,
705 unsigned char enable_flags,
706 unsigned char data_flags)
707{
708 return usb_stor_ctrl_transfer(us,
709 us->send_ctrl_pipe,
710 USBAT_CMD_UIO,
711 0x40,
712 short_pack(enable_flags, data_flags),
713 0,
714 NULL,
715 USBAT_UIO_WRITE);
716}
717
718/*
719 * Reset the device
720 * Often needed on media change.
721 */
722static int usbat_device_reset(struct us_data *us)
723{
724 int rc;
725
b7b1e655
DD		 726 /*
727 * Reset peripheral, enable peripheral control signals
728 * (bring reset signal up)
729 */
1da177e4
LT		 730 rc = usbat_write_user_io(us,
731 USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
732 USBAT_UIO_EPAD | USBAT_UIO_1);
733 if (rc != USB_STOR_XFER_GOOD)
734 return USB_STOR_TRANSPORT_ERROR;
735
b7b1e655
DD		 736 /*
737 * Enable peripheral control signals
738 * (bring reset signal down)
739 */
1da177e4
LT		 740 rc = usbat_write_user_io(us,
741 USBAT_UIO_OE1 | USBAT_UIO_OE0,
742 USBAT_UIO_EPAD | USBAT_UIO_1);
743 if (rc != USB_STOR_XFER_GOOD)
744 return USB_STOR_TRANSPORT_ERROR;
745
746 return USB_STOR_TRANSPORT_GOOD;
747}
748
749/*
750 * Enable card detect
751 */
752static int usbat_device_enable_cdt(struct us_data *us)
753{
754 int rc;
755
b7b1e655 756 /* Enable peripheral control signals and card detect */
1da177e4
LT		 757 rc = usbat_write_user_io(us,
758 USBAT_UIO_ACKD | USBAT_UIO_OE1 | USBAT_UIO_OE0,
759 USBAT_UIO_EPAD | USBAT_UIO_1);
760 if (rc != USB_STOR_XFER_GOOD)
761 return USB_STOR_TRANSPORT_ERROR;
762
763 return USB_STOR_TRANSPORT_GOOD;
764}
765
766/*
767 * Determine if media is present.
768 */
769static int usbat_flash_check_media_present(unsigned char *uio)
770{
771 if (*uio & USBAT_UIO_UI0) {
772 US_DEBUGP("usbat_flash_check_media_present: no media detected\n");
773 return USBAT_FLASH_MEDIA_NONE;
774 }
775
776 return USBAT_FLASH_MEDIA_CF;
777}
778
779/*
780 * Determine if media has changed since last operation
781 */
782static int usbat_flash_check_media_changed(unsigned char *uio)
783{
784 if (*uio & USBAT_UIO_0) {
785 US_DEBUGP("usbat_flash_check_media_changed: media change detected\n");
786 return USBAT_FLASH_MEDIA_CHANGED;
787 }
788
789 return USBAT_FLASH_MEDIA_SAME;
790}
791
792/*
793 * Check for media change / no media and handle the situation appropriately
794 */
795static int usbat_flash_check_media(struct us_data *us,
796 struct usbat_info *info)
797{
798 int rc;
799 unsigned char *uio = us->iobuf;
800
801 rc = usbat_read_user_io(us, uio);
802 if (rc != USB_STOR_XFER_GOOD)
803 return USB_STOR_TRANSPORT_ERROR;
804
b7b1e655 805 /* Check for media existence */
1da177e4
LT		 806 rc = usbat_flash_check_media_present(uio);
807 if (rc == USBAT_FLASH_MEDIA_NONE) {
808 info->sense_key = 0x02;
809 info->sense_asc = 0x3A;
810 info->sense_ascq = 0x00;
811 return USB_STOR_TRANSPORT_FAILED;
812 }
813
b7b1e655 814 /* Check for media change */
1da177e4
LT		 815 rc = usbat_flash_check_media_changed(uio);
816 if (rc == USBAT_FLASH_MEDIA_CHANGED) {
817
b7b1e655 818 /* Reset and re-enable card detect */
1da177e4
LT		 819 rc = usbat_device_reset(us);
820 if (rc != USB_STOR_TRANSPORT_GOOD)
821 return rc;
822 rc = usbat_device_enable_cdt(us);
823 if (rc != USB_STOR_TRANSPORT_GOOD)
824 return rc;
825
826 msleep(50);
827
828 rc = usbat_read_user_io(us, uio);
829 if (rc != USB_STOR_XFER_GOOD)
830 return USB_STOR_TRANSPORT_ERROR;
831
832 info->sense_key = UNIT_ATTENTION;
833 info->sense_asc = 0x28;
834 info->sense_ascq = 0x00;
835 return USB_STOR_TRANSPORT_FAILED;
836 }
837
838 return USB_STOR_TRANSPORT_GOOD;
839}
840
841/*
842 * Determine whether we are controlling a flash-based reader/writer,
843 * or a HP8200-based CD drive.
844 * Sets transport functions as appropriate.
845 */
846static int usbat_identify_device(struct us_data *us,
847 struct usbat_info *info)
848{
849 int rc;
850 unsigned char status;
851
852 if (!us || !info)
853 return USB_STOR_TRANSPORT_ERROR;
854
855 rc = usbat_device_reset(us);
856 if (rc != USB_STOR_TRANSPORT_GOOD)
857 return rc;
8845add3 858 msleep(500);
1da177e4
LT		 859
860 /*
68a6457e
DD		 861 * In attempt to distinguish between HP CDRW's and Flash readers, we now
862 * execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash
863 * readers), this command should fail with error. On ATAPI devices (i.e.
864 * CDROM drives), it should succeed.
1da177e4 865 */
68a6457e
DD		 866 rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1);
867 if (rc != USB_STOR_XFER_GOOD)
868 return USB_STOR_TRANSPORT_ERROR;
1da177e4 869
68a6457e
DD		 870 rc = usbat_get_status(us, &status);
871 if (rc != USB_STOR_XFER_GOOD)
872 return USB_STOR_TRANSPORT_ERROR;
1da177e4 873
b7b1e655 874 /* Check for error bit, or if the command 'fell through' */
a8798533 875 if (status == 0xA1 || !(status & 0x01)) {
b7b1e655 876 /* Device is HP 8200 */
1da177e4
LT		 877 US_DEBUGP("usbat_identify_device: Detected HP8200 CDRW\n");
878 info->devicetype = USBAT_DEV_HP8200;
a8798533 879 } else {
b7b1e655 880 /* Device is a CompactFlash reader/writer */
a8798533
DD		 881 US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
882 info->devicetype = USBAT_DEV_FLASH;
1da177e4
LT		 883 }
884
885 return USB_STOR_TRANSPORT_GOOD;
886}
887
888/*
889 * Set the transport function based on the device type
890 */
891static int usbat_set_transport(struct us_data *us,
bdcfd9e3
PC		 892 struct usbat_info *info,
893 int devicetype)
1da177e4 894{
1da177e4 895
bdcfd9e3
PC		 896 if (!info->devicetype)
897 info->devicetype = devicetype;
1da177e4 898
bdcfd9e3
PC		 899 if (!info->devicetype)
900 usbat_identify_device(us, info);
901
902 switch (info->devicetype) {
903 default:
904 return USB_STOR_TRANSPORT_ERROR;
905
906 case USBAT_DEV_HP8200:
1da177e4 907 us->transport = usbat_hp8200e_transport;
bdcfd9e3
PC		 908 break;
909
910 case USBAT_DEV_FLASH:
1da177e4 911 us->transport = usbat_flash_transport;
bdcfd9e3
PC		 912 break;
913 }
1da177e4
LT		 914
915 return 0;
916}
917
918/*
919 * Read the media capacity
920 */
921static int usbat_flash_get_sector_count(struct us_data *us,
922 struct usbat_info *info)
923{
924 unsigned char registers[3] = {
925 USBAT_ATA_SECCNT,
926 USBAT_ATA_DEVICE,
927 USBAT_ATA_CMD,
928 };
929 unsigned char command[3] = { 0x01, 0xA0, 0xEC };
930 unsigned char *reply;
931 unsigned char status;
932 int rc;
933
934 if (!us || !info)
935 return USB_STOR_TRANSPORT_ERROR;
936
937 reply = kmalloc(512, GFP_NOIO);
938 if (!reply)
939 return USB_STOR_TRANSPORT_ERROR;
940
b7b1e655 941 /* ATA command : IDENTIFY DEVICE */
1da177e4
LT		 942 rc = usbat_multiple_write(us, registers, command, 3);
943 if (rc != USB_STOR_XFER_GOOD) {
944 US_DEBUGP("usbat_flash_get_sector_count: Gah! identify_device failed\n");
945 rc = USB_STOR_TRANSPORT_ERROR;
946 goto leave;
947 }
948
b7b1e655 949 /* Read device status */
1da177e4
LT		 950 if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
951 rc = USB_STOR_TRANSPORT_ERROR;
952 goto leave;
953 }
954
955 msleep(100);
956
b7b1e655 957 /* Read the device identification data */
141804d4 958 rc = usbat_read_block(us, reply, 512, 0);
1da177e4
LT		 959 if (rc != USB_STOR_TRANSPORT_GOOD)
960 goto leave;
961
962 info->sectors = ((u32)(reply[117]) << 24) |
963 ((u32)(reply[116]) << 16) |
964 ((u32)(reply[115]) << 8) |
965 ((u32)(reply[114]) );
966
967 rc = USB_STOR_TRANSPORT_GOOD;
968
969 leave:
970 kfree(reply);
971 return rc;
972}
973
974/*
975 * Read data from device
976 */
977static int usbat_flash_read_data(struct us_data *us,
978 struct usbat_info *info,
979 u32 sector,
980 u32 sectors)
981{
982 unsigned char registers[7] = {
983 USBAT_ATA_FEATURES,
984 USBAT_ATA_SECCNT,
985 USBAT_ATA_SECNUM,
986 USBAT_ATA_LBA_ME,
987 USBAT_ATA_LBA_HI,
988 USBAT_ATA_DEVICE,
989 USBAT_ATA_STATUS,
990 };
991 unsigned char command[7];
992 unsigned char *buffer;
993 unsigned char thistime;
994 unsigned int totallen, alloclen;
995 int len, result;
996 unsigned int sg_idx = 0, sg_offset = 0;
997
998 result = usbat_flash_check_media(us, info);
999 if (result != USB_STOR_TRANSPORT_GOOD)
1000 return result;
1001
b7b1e655
DD		 1002 /*
1003 * we're working in LBA mode. according to the ATA spec,
1004 * we can support up to 28-bit addressing. I don't know if Jumpshot
1005 * supports beyond 24-bit addressing. It's kind of hard to test
1006 * since it requires > 8GB CF card.
1007 */
1da177e4
LT		 1008
1009 if (sector > 0x0FFFFFFF)
1010 return USB_STOR_TRANSPORT_ERROR;
1011
1012 totallen = sectors * info->ssize;
1013
b7b1e655
DD		 1014 /*
1015 * Since we don't read more than 64 KB at a time, we have to create
1016 * a bounce buffer and move the data a piece at a time between the
1017 * bounce buffer and the actual transfer buffer.
1018 */
1da177e4
LT		 1019
1020 alloclen = min(totallen, 65536u);
1021 buffer = kmalloc(alloclen, GFP_NOIO);
1022 if (buffer == NULL)
1023 return USB_STOR_TRANSPORT_ERROR;
1024
1025 do {
b7b1e655
DD		 1026 /*
1027 * loop, never allocate or transfer more than 64k at once
1028 * (min(128k, 255*info->ssize) is the real limit)
1029 */
1da177e4
LT		 1030 len = min(totallen, alloclen);
1031 thistime = (len / info->ssize) & 0xff;
1032
b7b1e655
DD		 1033 /* ATA command 0x20 (READ SECTORS) */
1034 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20);
1da177e4 1035
b7b1e655 1036 /* Write/execute ATA read command */
1da177e4
LT		 1037 result = usbat_multiple_write(us, registers, command, 7);
1038 if (result != USB_STOR_TRANSPORT_GOOD)
1039 goto leave;
1040
b7b1e655 1041 /* Read the data we just requested */
141804d4 1042 result = usbat_read_blocks(us, buffer, len, 0);
1da177e4
LT		 1043 if (result != USB_STOR_TRANSPORT_GOOD)
1044 goto leave;
1045
1046 US_DEBUGP("usbat_flash_read_data: %d bytes\n", len);
1047
b7b1e655 1048 /* Store the data in the transfer buffer */
1da177e4
LT		 1049 usb_stor_access_xfer_buf(buffer, len, us->srb,
1050 &sg_idx, &sg_offset, TO_XFER_BUF);
1051
1052 sector += thistime;
1053 totallen -= len;
1054 } while (totallen > 0);
1055
1056 kfree(buffer);
1057 return USB_STOR_TRANSPORT_GOOD;
1058
1059leave:
1060 kfree(buffer);
1061 return USB_STOR_TRANSPORT_ERROR;
1062}
1063
1064/*
1065 * Write data to device
1066 */
1067static int usbat_flash_write_data(struct us_data *us,
1068 struct usbat_info *info,
1069 u32 sector,
1070 u32 sectors)
1071{
1072 unsigned char registers[7] = {
1073 USBAT_ATA_FEATURES,
1074 USBAT_ATA_SECCNT,
1075 USBAT_ATA_SECNUM,
1076 USBAT_ATA_LBA_ME,
1077 USBAT_ATA_LBA_HI,
1078 USBAT_ATA_DEVICE,
1079 USBAT_ATA_STATUS,
1080 };
1081 unsigned char command[7];
1082 unsigned char *buffer;
1083 unsigned char thistime;
1084 unsigned int totallen, alloclen;
1085 int len, result;
1086 unsigned int sg_idx = 0, sg_offset = 0;
1087
1088 result = usbat_flash_check_media(us, info);
1089 if (result != USB_STOR_TRANSPORT_GOOD)
1090 return result;
1091
b7b1e655
DD		 1092 /*
1093 * we're working in LBA mode. according to the ATA spec,
1094 * we can support up to 28-bit addressing. I don't know if the device
1095 * supports beyond 24-bit addressing. It's kind of hard to test
1096 * since it requires > 8GB media.
1097 */
1da177e4
LT		 1098
1099 if (sector > 0x0FFFFFFF)
1100 return USB_STOR_TRANSPORT_ERROR;
1101
1102 totallen = sectors * info->ssize;
1103
b7b1e655
DD		 1104 /*
1105 * Since we don't write more than 64 KB at a time, we have to create
1106 * a bounce buffer and move the data a piece at a time between the
1107 * bounce buffer and the actual transfer buffer.
1108 */
1da177e4
LT		 1109
1110 alloclen = min(totallen, 65536u);
1111 buffer = kmalloc(alloclen, GFP_NOIO);
1112 if (buffer == NULL)
1113 return USB_STOR_TRANSPORT_ERROR;
1114
1115 do {
b7b1e655
DD		 1116 /*
1117 * loop, never allocate or transfer more than 64k at once
1118 * (min(128k, 255*info->ssize) is the real limit)
1119 */
1da177e4
LT		 1120 len = min(totallen, alloclen);
1121 thistime = (len / info->ssize) & 0xff;
1122
b7b1e655 1123 /* Get the data from the transfer buffer */
1da177e4
LT		 1124 usb_stor_access_xfer_buf(buffer, len, us->srb,
1125 &sg_idx, &sg_offset, FROM_XFER_BUF);
1126
b7b1e655
DD		 1127 /* ATA command 0x30 (WRITE SECTORS) */
1128 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
1da177e4 1129
b7b1e655 1130 /* Write/execute ATA write command */
1da177e4
LT		 1131 result = usbat_multiple_write(us, registers, command, 7);
1132 if (result != USB_STOR_TRANSPORT_GOOD)
1133 goto leave;
1134
b7b1e655 1135 /* Write the data */
141804d4 1136 result = usbat_write_blocks(us, buffer, len, 0);
1da177e4
LT		 1137 if (result != USB_STOR_TRANSPORT_GOOD)
1138 goto leave;
1139
1140 sector += thistime;
1141 totallen -= len;
1142 } while (totallen > 0);
1143
1144 kfree(buffer);
1145 return result;
1146
1147leave:
1148 kfree(buffer);
1149 return USB_STOR_TRANSPORT_ERROR;
1150}
1151
1152/*
1153 * Squeeze a potentially huge (> 65535 byte) read10 command into
1154 * a little ( <= 65535 byte) ATAPI pipe
1155 */
1156static int usbat_hp8200e_handle_read10(struct us_data *us,
1157 unsigned char *registers,
1158 unsigned char *data,
1159 struct scsi_cmnd *srb)
1160{
1161 int result = USB_STOR_TRANSPORT_GOOD;
1162 unsigned char *buffer;
1163 unsigned int len;
1164 unsigned int sector;
1165 unsigned int sg_segment = 0;
1166 unsigned int sg_offset = 0;
1167
1168 US_DEBUGP("handle_read10: transfersize %d\n",
1169 srb->transfersize);
1170
1171 if (srb->request_bufflen < 0x10000) {
1172
1173 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1174 registers, data, 19,
1175 USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1176 (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1177 DMA_FROM_DEVICE,
1178 srb->request_buffer,
1179 srb->request_bufflen, srb->use_sg, 1);
1180
1181 return result;
1182 }
1183
1184 /*
1185 * Since we're requesting more data than we can handle in
1186 * a single read command (max is 64k-1), we will perform
1187 * multiple reads, but each read must be in multiples of
1188 * a sector. Luckily the sector size is in srb->transfersize
1189 * (see linux/drivers/scsi/sr.c).
1190 */
1191
1192 if (data[7+0] == GPCMD_READ_CD) {
1193 len = short_pack(data[7+9], data[7+8]);
1194 len <<= 16;
1195 len |= data[7+7];
1196 US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len);
1197 srb->transfersize = srb->request_bufflen/len;
1198 }
1199
1200 if (!srb->transfersize) {
1201 srb->transfersize = 2048; /* A guess */
1202 US_DEBUGP("handle_read10: transfersize 0, forcing %d\n",
1203 srb->transfersize);
1204 }
1205
b7b1e655
DD		 1206 /*
1207 * Since we only read in one block at a time, we have to create
1208 * a bounce buffer and move the data a piece at a time between the
1209 * bounce buffer and the actual transfer buffer.
1210 */
1da177e4
LT		 1211
1212 len = (65535/srb->transfersize) * srb->transfersize;
1213 US_DEBUGP("Max read is %d bytes\n", len);
1214 len = min(len, srb->request_bufflen);
1215 buffer = kmalloc(len, GFP_NOIO);
b7b1e655 1216 if (buffer == NULL) /* bloody hell! */
1da177e4
LT		 1217 return USB_STOR_TRANSPORT_FAILED;
1218 sector = short_pack(data[7+3], data[7+2]);
1219 sector <<= 16;
1220 sector |= short_pack(data[7+5], data[7+4]);
1221 transferred = 0;
1222
b7b1e655
DD		 1223 sg_segment = 0; /* for keeping track of where we are in */
1224 sg_offset = 0; /* the scatter/gather list */
1da177e4
LT		 1225
1226 while (transferred != srb->request_bufflen) {
1227
1228 if (len > srb->request_bufflen - transferred)
1229 len = srb->request_bufflen - transferred;
1230
b7b1e655
DD		 1231 data[3] = len&0xFF; /* (cylL) = expected length (L) */
1232 data[4] = (len>>8)&0xFF; /* (cylH) = expected length (H) */
1da177e4 1233
b7b1e655 1234 /* Fix up the SCSI command sector and num sectors */
1da177e4 1235
b7b1e655 1236 data[7+2] = MSB_of(sector>>16); /* SCSI command sector */
1da177e4
LT		 1237 data[7+3] = LSB_of(sector>>16);
1238 data[7+4] = MSB_of(sector&0xFFFF);
1239 data[7+5] = LSB_of(sector&0xFFFF);
1240 if (data[7+0] == GPCMD_READ_CD)
1241 data[7+6] = 0;
b7b1e655
DD		 1242 data[7+7] = MSB_of(len / srb->transfersize); /* SCSI command */
1243 data[7+8] = LSB_of(len / srb->transfersize); /* num sectors */
1da177e4
LT		 1244
1245 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1246 registers, data, 19,
1247 USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1248 (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1249 DMA_FROM_DEVICE,
1250 buffer,
1251 len, 0, 1);
1252
1253 if (result != USB_STOR_TRANSPORT_GOOD)
1254 break;
1255
b7b1e655 1256 /* Store the data in the transfer buffer */
1da177e4
LT		 1257 usb_stor_access_xfer_buf(buffer, len, srb,
1258 &sg_segment, &sg_offset, TO_XFER_BUF);
1259
b7b1e655 1260 /* Update the amount transferred and the sector number */
1da177e4
LT		 1261
1262 transferred += len;
1263 sector += len / srb->transfersize;
1264
b7b1e655 1265 } /* while transferred != srb->request_bufflen */
1da177e4
LT		 1266
1267 kfree(buffer);
1268 return result;
1269}
1270
1271static int usbat_select_and_test_registers(struct us_data *us)
1272{
1273 int selector;
1274 unsigned char *status = us->iobuf;
1da177e4 1275
b7b1e655 1276 /* try device = master, then device = slave. */
68a6457e
DD		 1277 for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
1278 if (usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
1da177e4
LT		 1279 USB_STOR_XFER_GOOD)
1280 return USB_STOR_TRANSPORT_ERROR;
1281
1282 if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) !=
1283 USB_STOR_XFER_GOOD)
1284 return USB_STOR_TRANSPORT_ERROR;
1285
1286 if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) !=
1287 USB_STOR_XFER_GOOD)
1288 return USB_STOR_TRANSPORT_ERROR;
1289
1290 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1291 USB_STOR_XFER_GOOD)
1292 return USB_STOR_TRANSPORT_ERROR;
1293
1294 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1295 USB_STOR_XFER_GOOD)
1296 return USB_STOR_TRANSPORT_ERROR;
1297
1298 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) !=
1299 USB_STOR_XFER_GOOD)
1300 return USB_STOR_TRANSPORT_ERROR;
1301
1302 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) !=
1303 USB_STOR_XFER_GOOD)
1304 return USB_STOR_TRANSPORT_ERROR;
1305
1306 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1307 USB_STOR_XFER_GOOD)
1308 return USB_STOR_TRANSPORT_ERROR;
1309
1310 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1311 USB_STOR_XFER_GOOD)
1312 return USB_STOR_TRANSPORT_ERROR;
1313 }
1314
1315 return USB_STOR_TRANSPORT_GOOD;
1316}
1317
1318/*
1319 * Initialize the USBAT processor and the storage device
1320 */
bdcfd9e3 1321static int init_usbat(struct us_data *us, int devicetype)
1da177e4
LT		 1322{
1323 int rc;
1324 struct usbat_info *info;
1325 unsigned char subcountH = USBAT_ATA_LBA_HI;
1326 unsigned char subcountL = USBAT_ATA_LBA_ME;
1327 unsigned char *status = us->iobuf;
1328
887c2560 1329 us->extra = kzalloc(sizeof(struct usbat_info), GFP_NOIO);
1da177e4
LT		 1330 if (!us->extra) {
1331 US_DEBUGP("init_usbat: Gah! Can't allocate storage for usbat info struct!\n");
1332 return 1;
1333 }
1da177e4
LT		 1334 info = (struct usbat_info *) (us->extra);
1335
b7b1e655 1336 /* Enable peripheral control signals */
1da177e4
LT		 1337 rc = usbat_write_user_io(us,
1338 USBAT_UIO_OE1 | USBAT_UIO_OE0,
1339 USBAT_UIO_EPAD | USBAT_UIO_1);
1340 if (rc != USB_STOR_XFER_GOOD)
1341 return USB_STOR_TRANSPORT_ERROR;
1342
1343 US_DEBUGP("INIT 1\n");
1344
1345 msleep(2000);
1346
1347 rc = usbat_read_user_io(us, status);
1348 if (rc != USB_STOR_TRANSPORT_GOOD)
1349 return rc;
1350
1351 US_DEBUGP("INIT 2\n");
1352
1353 rc = usbat_read_user_io(us, status);
1354 if (rc != USB_STOR_XFER_GOOD)
1355 return USB_STOR_TRANSPORT_ERROR;
1356
1357 rc = usbat_read_user_io(us, status);
1358 if (rc != USB_STOR_XFER_GOOD)
1359 return USB_STOR_TRANSPORT_ERROR;
1360
1361 US_DEBUGP("INIT 3\n");
1362
1da177e4
LT		 1363 rc = usbat_select_and_test_registers(us);
1364 if (rc != USB_STOR_TRANSPORT_GOOD)
1365 return rc;
1366
68a6457e 1367 US_DEBUGP("INIT 4\n");
1da177e4
LT		 1368
1369 rc = usbat_read_user_io(us, status);
1370 if (rc != USB_STOR_XFER_GOOD)
1371 return USB_STOR_TRANSPORT_ERROR;
1372
68a6457e 1373 US_DEBUGP("INIT 5\n");
1da177e4 1374
b7b1e655 1375 /* Enable peripheral control signals and card detect */
1da177e4
LT		 1376 rc = usbat_device_enable_cdt(us);
1377 if (rc != USB_STOR_TRANSPORT_GOOD)
1378 return rc;
1379
68a6457e 1380 US_DEBUGP("INIT 6\n");
1da177e4
LT		 1381
1382 rc = usbat_read_user_io(us, status);
1383 if (rc != USB_STOR_XFER_GOOD)
1384 return USB_STOR_TRANSPORT_ERROR;
1385
68a6457e 1386 US_DEBUGP("INIT 7\n");
1da177e4
LT		 1387
1388 msleep(1400);
1389
1390 rc = usbat_read_user_io(us, status);
1391 if (rc != USB_STOR_XFER_GOOD)
1392 return USB_STOR_TRANSPORT_ERROR;
1393
68a6457e 1394 US_DEBUGP("INIT 8\n");
1da177e4
LT		 1395
1396 rc = usbat_select_and_test_registers(us);
1397 if (rc != USB_STOR_TRANSPORT_GOOD)
1398 return rc;
1399
68a6457e
DD		 1400 US_DEBUGP("INIT 9\n");
1401
b7b1e655 1402 /* At this point, we need to detect which device we are using */
bdcfd9e3 1403 if (usbat_set_transport(us, info, devicetype))
68a6457e
DD		 1404 return USB_STOR_TRANSPORT_ERROR;
1405
1406 US_DEBUGP("INIT 10\n");
1da177e4
LT		 1407
1408 if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
1409 subcountH = 0x02;
1410 subcountL = 0x00;
1411 }
1412 rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
1413 0x00, 0x88, 0x08, subcountH, subcountL);
1414 if (rc != USB_STOR_XFER_GOOD)
1415 return USB_STOR_TRANSPORT_ERROR;
1416
68a6457e 1417 US_DEBUGP("INIT 11\n");
1da177e4
LT		 1418
1419 return USB_STOR_TRANSPORT_GOOD;
1420}
1421
1422/*
1423 * Transport for the HP 8200e
1424 */
1425static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
1426{
1427 int result;
1428 unsigned char *status = us->iobuf;
1429 unsigned char registers[32];
1430 unsigned char data[32];
1431 unsigned int len;
1432 int i;
1433 char string[64];
1434
1435 len = srb->request_bufflen;
1436
1437 /* Send A0 (ATA PACKET COMMAND).
1438 Note: I guess we're never going to get any of the ATA
1439 commands... just ATA Packet Commands.
1440 */
1441
1442 registers[0] = USBAT_ATA_FEATURES;
1443 registers[1] = USBAT_ATA_SECCNT;
1444 registers[2] = USBAT_ATA_SECNUM;
1445 registers[3] = USBAT_ATA_LBA_ME;
1446 registers[4] = USBAT_ATA_LBA_HI;
1447 registers[5] = USBAT_ATA_DEVICE;
1448 registers[6] = USBAT_ATA_CMD;
1449 data[0] = 0x00;
1450 data[1] = 0x00;
1451 data[2] = 0x00;
b7b1e655
DD		 1452 data[3] = len&0xFF; /* (cylL) = expected length (L) */
1453 data[4] = (len>>8)&0xFF; /* (cylH) = expected length (H) */
1454 data[5] = 0xB0; /* (device sel) = slave */
1455 data[6] = 0xA0; /* (command) = ATA PACKET COMMAND */
1da177e4
LT		 1456
1457 for (i=7; i<19; i++) {
1458 registers[i] = 0x10;
1459 data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
1460 }
1461
1462 result = usbat_get_status(us, status);
1463 US_DEBUGP("Status = %02X\n", *status);
1464 if (result != USB_STOR_XFER_GOOD)
1465 return USB_STOR_TRANSPORT_ERROR;
1466 if (srb->cmnd[0] == TEST_UNIT_READY)
1467 transferred = 0;
1468
1469 if (srb->sc_data_direction == DMA_TO_DEVICE) {
1470
1471 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1472 registers, data, 19,
1473 USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1474 (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1475 DMA_TO_DEVICE,
1476 srb->request_buffer,
1477 len, srb->use_sg, 10);
1478
1479 if (result == USB_STOR_TRANSPORT_GOOD) {
1480 transferred += len;
1481 US_DEBUGP("Wrote %08X bytes\n", transferred);
1482 }
1483
1484 return result;
1485
1486 } else if (srb->cmnd[0] == READ_10 ||
1487 srb->cmnd[0] == GPCMD_READ_CD) {
1488
1489 return usbat_hp8200e_handle_read10(us, registers, data, srb);
1490
1491 }
1492
1493 if (len > 0xFFFF) {
1494 US_DEBUGP("Error: len = %08X... what do I do now?\n",
1495 len);
1496 return USB_STOR_TRANSPORT_ERROR;
1497 }
1498
1499 if ( (result = usbat_multiple_write(us,
1500 registers, data, 7)) != USB_STOR_TRANSPORT_GOOD) {
1501 return result;
1502 }
1503
b7b1e655
DD		 1504 /*
1505 * Write the 12-byte command header.
1506 *
1507 * If the command is BLANK then set the timer for 75 minutes.
1508 * Otherwise set it for 10 minutes.
1509 *
1510 * NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
1511 * AT SPEED 4 IS UNRELIABLE!!!
1512 */
1da177e4 1513
141804d4 1514 if ((result = usbat_write_block(us,
1da177e4 1515 USBAT_ATA, srb->cmnd, 12,
141804d4
PC		 1516 (srb->cmnd[0]==GPCMD_BLANK ? 75 : 10), 0) !=
1517 USB_STOR_TRANSPORT_GOOD)) {
1da177e4
LT		 1518 return result;
1519 }
1520
b7b1e655 1521 /* If there is response data to be read in then do it here. */
1da177e4
LT		 1522
1523 if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
1524
b7b1e655 1525 /* How many bytes to read in? Check cylL register */
1da177e4
LT		 1526
1527 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1528 USB_STOR_XFER_GOOD) {
1529 return USB_STOR_TRANSPORT_ERROR;
1530 }
1531
b7b1e655 1532 if (len > 0xFF) { /* need to read cylH also */
1da177e4
LT		 1533 len = *status;
1534 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1535 USB_STOR_XFER_GOOD) {
1536 return USB_STOR_TRANSPORT_ERROR;
1537 }
1538 len += ((unsigned int) *status)<<8;
1539 }
1540 else
1541 len = *status;
1542
1543
141804d4 1544 result = usbat_read_block(us, srb->request_buffer, len, srb->use_sg);
1da177e4
LT		 1545
1546 /* Debug-print the first 32 bytes of the transfer */
1547
1548 if (!srb->use_sg) {
1549 string[0] = 0;
1550 for (i=0; i<len && i<32; i++) {
1551 sprintf(string+strlen(string), "%02X ",
1552 ((unsigned char *)srb->request_buffer)[i]);
1553 if ((i%16)==15) {
1554 US_DEBUGP("%s\n", string);
1555 string[0] = 0;
1556 }
1557 }
1558 if (string[0]!=0)
1559 US_DEBUGP("%s\n", string);
1560 }
1561 }
1562
1563 return result;
1564}
1565
1566/*
1567 * Transport for USBAT02-based CompactFlash and similar storage devices
1568 */
1569static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
1570{
1571 int rc;
1572 struct usbat_info *info = (struct usbat_info *) (us->extra);
1573 unsigned long block, blocks;
1574 unsigned char *ptr = us->iobuf;
1575 static unsigned char inquiry_response[36] = {
1576 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
1577 };
1578
1579 if (srb->cmnd[0] == INQUIRY) {
1580 US_DEBUGP("usbat_flash_transport: INQUIRY. Returning bogus response.\n");
1581 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
1582 fill_inquiry_response(us, ptr, 36);
1583 return USB_STOR_TRANSPORT_GOOD;
1584 }
1585
1586 if (srb->cmnd[0] == READ_CAPACITY) {
1587 rc = usbat_flash_check_media(us, info);
1588 if (rc != USB_STOR_TRANSPORT_GOOD)
1589 return rc;
1590
1591 rc = usbat_flash_get_sector_count(us, info);
1592 if (rc != USB_STOR_TRANSPORT_GOOD)
1593 return rc;
1594
b7b1e655
DD		 1595 /* hard coded 512 byte sectors as per ATA spec */
1596 info->ssize = 0x200;
1da177e4
LT		 1597 US_DEBUGP("usbat_flash_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
1598 info->sectors, info->ssize);
1599
b7b1e655
DD		 1600 /*
1601 * build the reply
1602 * note: must return the sector number of the last sector,
1603 * *not* the total number of sectors
1604 */
1da177e4
LT		 1605 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
1606 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
1607 usb_stor_set_xfer_buf(ptr, 8, srb);
1608
1609 return USB_STOR_TRANSPORT_GOOD;
1610 }
1611
1612 if (srb->cmnd[0] == MODE_SELECT_10) {
1613 US_DEBUGP("usbat_flash_transport: Gah! MODE_SELECT_10.\n");
1614 return USB_STOR_TRANSPORT_ERROR;
1615 }
1616
1617 if (srb->cmnd[0] == READ_10) {
1618 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1619 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1620
1621 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1622
1623 US_DEBUGP("usbat_flash_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
1624 return usbat_flash_read_data(us, info, block, blocks);
1625 }
1626
1627 if (srb->cmnd[0] == READ_12) {
b7b1e655
DD		 1628 /*
1629 * I don't think we'll ever see a READ_12 but support it anyway
1630 */
1da177e4
LT		 1631 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1632 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1633
1634 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1635 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
1636
1637 US_DEBUGP("usbat_flash_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
1638 return usbat_flash_read_data(us, info, block, blocks);
1639 }
1640
1641 if (srb->cmnd[0] == WRITE_10) {
1642 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1643 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1644
1645 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1646
1647 US_DEBUGP("usbat_flash_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
1648 return usbat_flash_write_data(us, info, block, blocks);
1649 }
1650
1651 if (srb->cmnd[0] == WRITE_12) {
b7b1e655
DD		 1652 /*
1653 * I don't think we'll ever see a WRITE_12 but support it anyway
1654 */
1da177e4
LT		 1655 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1656 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1657
1658 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1659 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
1660
1661 US_DEBUGP("usbat_flash_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
1662 return usbat_flash_write_data(us, info, block, blocks);
1663 }
1664
1665
1666 if (srb->cmnd[0] == TEST_UNIT_READY) {
1667 US_DEBUGP("usbat_flash_transport: TEST_UNIT_READY.\n");
1668
1669 rc = usbat_flash_check_media(us, info);
1670 if (rc != USB_STOR_TRANSPORT_GOOD)
1671 return rc;
1672
1673 return usbat_check_status(us);
1674 }
1675
1676 if (srb->cmnd[0] == REQUEST_SENSE) {
1677 US_DEBUGP("usbat_flash_transport: REQUEST_SENSE.\n");
1678
1679 memset(ptr, 0, 18);
1680 ptr[0] = 0xF0;
1681 ptr[2] = info->sense_key;
1682 ptr[7] = 11;
1683 ptr[12] = info->sense_asc;
1684 ptr[13] = info->sense_ascq;
1685 usb_stor_set_xfer_buf(ptr, 18, srb);
1686
1687 return USB_STOR_TRANSPORT_GOOD;
1688 }
1689
1690 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
b7b1e655
DD		 1691 /*
1692 * sure. whatever. not like we can stop the user from popping
1693 * the media out of the device (no locking doors, etc)
1694 */
1da177e4
LT		 1695 return USB_STOR_TRANSPORT_GOOD;
1696 }
1697
1698 US_DEBUGP("usbat_flash_transport: Gah! Unknown command: %d (0x%x)\n",
1699 srb->cmnd[0], srb->cmnd[0]);
1700 info->sense_key = 0x05;
1701 info->sense_asc = 0x20;
1702 info->sense_ascq = 0x00;
1703 return USB_STOR_TRANSPORT_FAILED;
1704}
1705
bdcfd9e3
PC		 1706int init_usbat_cd(struct us_data *us)
1707{
1708 return init_usbat(us, USBAT_DEV_HP8200);
1709}
1710
1711
1712int init_usbat_flash(struct us_data *us)
1713{
1714 return init_usbat(us, USBAT_DEV_FLASH);
1715}
1716
1717int init_usbat_probe(struct us_data *us)
1718{
1719 return init_usbat(us, 0);
1720}
1721
1da177e4
LT		 1722/*
1723 * Default transport function. Attempts to detect which transport function
1724 * should be called, makes it the new default, and calls it.
1725 *
1726 * This function should never be called. Our usbat_init() function detects the
1727 * device type and changes the us->transport ptr to the transport function
1728 * relevant to the device.
1729 * However, we'll support this impossible(?) case anyway.
1730 */
1731int usbat_transport(struct scsi_cmnd *srb, struct us_data *us)
1732{
1733 struct usbat_info *info = (struct usbat_info*) (us->extra);
1734
bdcfd9e3 1735 if (usbat_set_transport(us, info, 0))
1da177e4
LT		 1736 return USB_STOR_TRANSPORT_ERROR;
1737
1738 return us->transport(srb, us);
1739}
Linux kernel - Deliverables
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