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virtio_blk: don't bounce highmem requests
[linux-2.6/mini2440.git] / drivers / usb / storage / shuttle_usbat.c
blobb62a28814ebeaec12d0a1989c433f0c067572ce9
1 /* Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable
2 *
3 * Current development and maintenance by:
4 * (c) 2000, 2001 Robert Baruch (autophile@starband.net)
5 * (c) 2004, 2005 Daniel Drake <dsd@gentoo.org>
6 *
7 * Developed with the assistance of:
8 * (c) 2002 Alan Stern <stern@rowland.org>
9 *
10 * Flash support based on earlier work by:
11 * (c) 2002 Thomas Kreiling <usbdev@sm04.de>
12 *
13 * Many originally ATAPI devices were slightly modified to meet the USB
14 * market by using some kind of translation from ATAPI to USB on the host,
15 * and the peripheral would translate from USB back to ATAPI.
16 *
17 * SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only,
18 * which does the USB-to-ATAPI conversion. By obtaining the data sheet on
19 * their device under nondisclosure agreement, I have been able to write
20 * this driver for Linux.
21 *
22 * The chip used in the device can also be used for EPP and ISA translation
23 * as well. This driver is only guaranteed to work with the ATAPI
24 * translation.
25 *
26 * See the Kconfig help text for a list of devices known to be supported by
27 * this driver.
28 *
29 * This program is free software; you can redistribute it and/or modify it
30 * under the terms of the GNU General Public License as published by the
31 * Free Software Foundation; either version 2, or (at your option) any
32 * later version.
33 *
34 * This program is distributed in the hope that it will be useful, but
35 * WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
37 * General Public License for more details.
38 *
39 * You should have received a copy of the GNU General Public License along
40 * with this program; if not, write to the Free Software Foundation, Inc.,
41 * 675 Mass Ave, Cambridge, MA 02139, USA.
42 */
43
44 #include <linux/errno.h>
45 #include <linux/module.h>
46 #include <linux/slab.h>
47 #include <linux/cdrom.h>
48
49 #include <scsi/scsi.h>
50 #include <scsi/scsi_cmnd.h>
51
52 #include "usb.h"
53 #include "transport.h"
54 #include "protocol.h"
55 #include "debug.h"
56
57 MODULE_DESCRIPTION("Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable");
58 MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>, Robert Baruch <autophile@starband.net>");
59 MODULE_LICENSE("GPL");
60
61 /* Supported device types */
62 #define USBAT_DEV_HP8200 0x01
63 #define USBAT_DEV_FLASH 0x02
64
65 #define USBAT_EPP_PORT 0x10
66 #define USBAT_EPP_REGISTER 0x30
67 #define USBAT_ATA 0x40
68 #define USBAT_ISA 0x50
69
70 /* Commands (need to be logically OR'd with an access type */
71 #define USBAT_CMD_READ_REG 0x00
72 #define USBAT_CMD_WRITE_REG 0x01
73 #define USBAT_CMD_READ_BLOCK 0x02
74 #define USBAT_CMD_WRITE_BLOCK 0x03
75 #define USBAT_CMD_COND_READ_BLOCK 0x04
76 #define USBAT_CMD_COND_WRITE_BLOCK 0x05
77 #define USBAT_CMD_WRITE_REGS 0x07
78
79 /* Commands (these don't need an access type) */
80 #define USBAT_CMD_EXEC_CMD 0x80
81 #define USBAT_CMD_SET_FEAT 0x81
82 #define USBAT_CMD_UIO 0x82
83
84 /* Methods of accessing UIO register */
85 #define USBAT_UIO_READ 1
86 #define USBAT_UIO_WRITE 0
87
88 /* Qualifier bits */
89 #define USBAT_QUAL_FCQ 0x20 /* full compare */
90 #define USBAT_QUAL_ALQ 0x10 /* auto load subcount */
91
92 /* USBAT Flash Media status types */
93 #define USBAT_FLASH_MEDIA_NONE 0
94 #define USBAT_FLASH_MEDIA_CF 1
95
96 /* USBAT Flash Media change types */
97 #define USBAT_FLASH_MEDIA_SAME 0
98 #define USBAT_FLASH_MEDIA_CHANGED 1
99
100 /* USBAT ATA registers */
101 #define USBAT_ATA_DATA 0x10 /* read/write data (R/W) */
102 #define USBAT_ATA_FEATURES 0x11 /* set features (W) */
103 #define USBAT_ATA_ERROR 0x11 /* error (R) */
104 #define USBAT_ATA_SECCNT 0x12 /* sector count (R/W) */
105 #define USBAT_ATA_SECNUM 0x13 /* sector number (R/W) */
106 #define USBAT_ATA_LBA_ME 0x14 /* cylinder low (R/W) */
107 #define USBAT_ATA_LBA_HI 0x15 /* cylinder high (R/W) */
108 #define USBAT_ATA_DEVICE 0x16 /* head/device selection (R/W) */
109 #define USBAT_ATA_STATUS 0x17 /* device status (R) */
110 #define USBAT_ATA_CMD 0x17 /* device command (W) */
111 #define USBAT_ATA_ALTSTATUS 0x0E /* status (no clear IRQ) (R) */
112
113 /* USBAT User I/O Data registers */
114 #define USBAT_UIO_EPAD 0x80 /* Enable Peripheral Control Signals */
115 #define USBAT_UIO_CDT 0x40 /* Card Detect (Read Only) */
116 /* CDT = ACKD & !UI1 & !UI0 */
117 #define USBAT_UIO_1 0x20 /* I/O 1 */
118 #define USBAT_UIO_0 0x10 /* I/O 0 */
119 #define USBAT_UIO_EPP_ATA 0x08 /* 1=EPP mode, 0=ATA mode */
120 #define USBAT_UIO_UI1 0x04 /* Input 1 */
121 #define USBAT_UIO_UI0 0x02 /* Input 0 */
122 #define USBAT_UIO_INTR_ACK 0x01 /* Interrupt (ATA/ISA)/Acknowledge (EPP) */
123
124 /* USBAT User I/O Enable registers */
125 #define USBAT_UIO_DRVRST 0x80 /* Reset Peripheral */
126 #define USBAT_UIO_ACKD 0x40 /* Enable Card Detect */
127 #define USBAT_UIO_OE1 0x20 /* I/O 1 set=output/clr=input */
128 /* If ACKD=1, set OE1 to 1 also. */
129 #define USBAT_UIO_OE0 0x10 /* I/O 0 set=output/clr=input */
130 #define USBAT_UIO_ADPRST 0x01 /* Reset SCM chip */
131
132 /* USBAT Features */
133 #define USBAT_FEAT_ETEN 0x80 /* External trigger enable */
134 #define USBAT_FEAT_U1 0x08
135 #define USBAT_FEAT_U0 0x04
136 #define USBAT_FEAT_ET1 0x02
137 #define USBAT_FEAT_ET2 0x01
138
139 struct usbat_info {
140 int devicetype;
141
142 /* Used for Flash readers only */
143 unsigned long sectors; /* total sector count */
144 unsigned long ssize; /* sector size in bytes */
145
146 unsigned char sense_key;
147 unsigned long sense_asc; /* additional sense code */
148 unsigned long sense_ascq; /* additional sense code qualifier */
149 };
150
151 #define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
152 #define LSB_of(s) ((s)&0xFF)
153 #define MSB_of(s) ((s)>>8)
154
155 static int transferred = 0;
156
157 static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
158 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
159
160 static int init_usbat_cd(struct us_data *us);
161 static int init_usbat_flash(struct us_data *us);
162
163
164 /*
165 * The table of devices
166 */
167 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
168 vendorName, productName, useProtocol, useTransport, \
169 initFunction, flags) \
170 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
171 .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
172
173 struct usb_device_id usbat_usb_ids[] = {
174 # include "unusual_usbat.h"
175 { } /* Terminating entry */
176 };
177 MODULE_DEVICE_TABLE(usb, usbat_usb_ids);
178
179 #undef UNUSUAL_DEV
180
181 /*
182 * The flags table
183 */
184 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
185 vendor_name, product_name, use_protocol, use_transport, \
186 init_function, Flags) \
187 { \
188 .vendorName = vendor_name, \
189 .productName = product_name, \
190 .useProtocol = use_protocol, \
191 .useTransport = use_transport, \
192 .initFunction = init_function, \
193 }
194
195 static struct us_unusual_dev usbat_unusual_dev_list[] = {
196 # include "unusual_usbat.h"
197 { } /* Terminating entry */
198 };
199
200 #undef UNUSUAL_DEV
201
202 /*
203 * Convenience function to produce an ATA read/write sectors command
204 * Use cmd=0x20 for read, cmd=0x30 for write
205 */
206 static void usbat_pack_ata_sector_cmd(unsigned char *buf,
207 unsigned char thistime,
208 u32 sector, unsigned char cmd)
209 {
210 buf[0] = 0;
211 buf[1] = thistime;
212 buf[2] = sector & 0xFF;
213 buf[3] = (sector >> 8) & 0xFF;
214 buf[4] = (sector >> 16) & 0xFF;
215 buf[5] = 0xE0 | ((sector >> 24) & 0x0F);
216 buf[6] = cmd;
217 }
218
219 /*
220 * Convenience function to get the device type (flash or hp8200)
221 */
222 static int usbat_get_device_type(struct us_data *us)
223 {
224 return ((struct usbat_info*)us->extra)->devicetype;
225 }
226
227 /*
228 * Read a register from the device
229 */
230 static int usbat_read(struct us_data *us,
231 unsigned char access,
232 unsigned char reg,
233 unsigned char *content)
234 {
235 return usb_stor_ctrl_transfer(us,
236 us->recv_ctrl_pipe,
237 access | USBAT_CMD_READ_REG,
238 0xC0,
239 (u16)reg,
240 0,
241 content,
242 1);
243 }
244
245 /*
246 * Write to a register on the device
247 */
248 static int usbat_write(struct us_data *us,
249 unsigned char access,
250 unsigned char reg,
251 unsigned char content)
252 {
253 return usb_stor_ctrl_transfer(us,
254 us->send_ctrl_pipe,
255 access | USBAT_CMD_WRITE_REG,
256 0x40,
257 short_pack(reg, content),
258 0,
259 NULL,
260 0);
261 }
262
263 /*
264 * Convenience function to perform a bulk read
265 */
266 static int usbat_bulk_read(struct us_data *us,
267 void* buf,
268 unsigned int len,
269 int use_sg)
270 {
271 if (len == 0)
272 return USB_STOR_XFER_GOOD;
273
274 US_DEBUGP("usbat_bulk_read: len = %d\n", len);
275 return usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe, buf, len, use_sg, NULL);
276 }
277
278 /*
279 * Convenience function to perform a bulk write
280 */
281 static int usbat_bulk_write(struct us_data *us,
282 void* buf,
283 unsigned int len,
284 int use_sg)
285 {
286 if (len == 0)
287 return USB_STOR_XFER_GOOD;
288
289 US_DEBUGP("usbat_bulk_write: len = %d\n", len);
290 return usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe, buf, len, use_sg, NULL);
291 }
292
293 /*
294 * Some USBAT-specific commands can only be executed over a command transport
295 * This transport allows one (len=8) or two (len=16) vendor-specific commands
296 * to be executed.
297 */
298 static int usbat_execute_command(struct us_data *us,
299 unsigned char *commands,
300 unsigned int len)
301 {
302 return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
303 USBAT_CMD_EXEC_CMD, 0x40, 0, 0,
304 commands, len);
305 }
306
307 /*
308 * Read the status register
309 */
310 static int usbat_get_status(struct us_data *us, unsigned char *status)
311 {
312 int rc;
313 rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status);
314
315 US_DEBUGP("usbat_get_status: 0x%02X\n", (unsigned short) (*status));
316 return rc;
317 }
318
319 /*
320 * Check the device status
321 */
322 static int usbat_check_status(struct us_data *us)
323 {
324 unsigned char *reply = us->iobuf;
325 int rc;
326
327 rc = usbat_get_status(us, reply);
328 if (rc != USB_STOR_XFER_GOOD)
329 return USB_STOR_TRANSPORT_FAILED;
330
331 /* error/check condition (0x51 is ok) */
332 if (*reply & 0x01 && *reply != 0x51)
333 return USB_STOR_TRANSPORT_FAILED;
334
335 /* device fault */
336 if (*reply & 0x20)
337 return USB_STOR_TRANSPORT_FAILED;
338
339 return USB_STOR_TRANSPORT_GOOD;
340 }
341
342 /*
343 * Stores critical information in internal registers in prepartion for the execution
344 * of a conditional usbat_read_blocks or usbat_write_blocks call.
345 */
346 static int usbat_set_shuttle_features(struct us_data *us,
347 unsigned char external_trigger,
348 unsigned char epp_control,
349 unsigned char mask_byte,
350 unsigned char test_pattern,
351 unsigned char subcountH,
352 unsigned char subcountL)
353 {
354 unsigned char *command = us->iobuf;
355
356 command[0] = 0x40;
357 command[1] = USBAT_CMD_SET_FEAT;
358
359 /*
360 * The only bit relevant to ATA access is bit 6
361 * which defines 8 bit data access (set) or 16 bit (unset)
362 */
363 command[2] = epp_control;
364
365 /*
366 * If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
367 * ET1 and ET2 define an external event to be checked for on event of a
368 * _read_blocks or _write_blocks operation. The read/write will not take
369 * place unless the defined trigger signal is active.
370 */
371 command[3] = external_trigger;
372
373 /*
374 * The resultant byte of the mask operation (see mask_byte) is compared for
375 * equivalence with this test pattern. If equal, the read/write will take
376 * place.
377 */
378 command[4] = test_pattern;
379
380 /*
381 * This value is logically ANDed with the status register field specified
382 * in the read/write command.
383 */
384 command[5] = mask_byte;
385
386 /*
387 * If ALQ is set in the qualifier, this field contains the address of the
388 * registers where the byte count should be read for transferring the data.
389 * If ALQ is not set, then this field contains the number of bytes to be
390 * transferred.
391 */
392 command[6] = subcountL;
393 command[7] = subcountH;
394
395 return usbat_execute_command(us, command, 8);
396 }
397
398 /*
399 * Block, waiting for an ATA device to become not busy or to report
400 * an error condition.
401 */
402 static int usbat_wait_not_busy(struct us_data *us, int minutes)
403 {
404 int i;
405 int result;
406 unsigned char *status = us->iobuf;
407
408 /* Synchronizing cache on a CDR could take a heck of a long time,
409 * but probably not more than 10 minutes or so. On the other hand,
410 * doing a full blank on a CDRW at speed 1 will take about 75
411 * minutes!
412 */
413
414 for (i=0; i<1200+minutes*60; i++) {
415
416 result = usbat_get_status(us, status);
417
418 if (result!=USB_STOR_XFER_GOOD)
419 return USB_STOR_TRANSPORT_ERROR;
420 if (*status & 0x01) { /* check condition */
421 result = usbat_read(us, USBAT_ATA, 0x10, status);
422 return USB_STOR_TRANSPORT_FAILED;
423 }
424 if (*status & 0x20) /* device fault */
425 return USB_STOR_TRANSPORT_FAILED;
426
427 if ((*status & 0x80)==0x00) { /* not busy */
428 US_DEBUGP("Waited not busy for %d steps\n", i);
429 return USB_STOR_TRANSPORT_GOOD;
430 }
431
432 if (i<500)
433 msleep(10); /* 5 seconds */
434 else if (i<700)
435 msleep(50); /* 10 seconds */
436 else if (i<1200)
437 msleep(100); /* 50 seconds */
438 else
439 msleep(1000); /* X minutes */
440 }
441
442 US_DEBUGP("Waited not busy for %d minutes, timing out.\n",
443 minutes);
444 return USB_STOR_TRANSPORT_FAILED;
445 }
446
447 /*
448 * Read block data from the data register
449 */
450 static int usbat_read_block(struct us_data *us,
451 void* buf,
452 unsigned short len,
453 int use_sg)
454 {
455 int result;
456 unsigned char *command = us->iobuf;
457
458 if (!len)
459 return USB_STOR_TRANSPORT_GOOD;
460
461 command[0] = 0xC0;
462 command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK;
463 command[2] = USBAT_ATA_DATA;
464 command[3] = 0;
465 command[4] = 0;
466 command[5] = 0;
467 command[6] = LSB_of(len);
468 command[7] = MSB_of(len);
469
470 result = usbat_execute_command(us, command, 8);
471 if (result != USB_STOR_XFER_GOOD)
472 return USB_STOR_TRANSPORT_ERROR;
473
474 result = usbat_bulk_read(us, buf, len, use_sg);
475 return (result == USB_STOR_XFER_GOOD ?
476 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
477 }
478
479 /*
480 * Write block data via the data register
481 */
482 static int usbat_write_block(struct us_data *us,
483 unsigned char access,
484 void* buf,
485 unsigned short len,
486 int minutes,
487 int use_sg)
488 {
489 int result;
490 unsigned char *command = us->iobuf;
491
492 if (!len)
493 return USB_STOR_TRANSPORT_GOOD;
494
495 command[0] = 0x40;
496 command[1] = access | USBAT_CMD_WRITE_BLOCK;
497 command[2] = USBAT_ATA_DATA;
498 command[3] = 0;
499 command[4] = 0;
500 command[5] = 0;
501 command[6] = LSB_of(len);
502 command[7] = MSB_of(len);
503
504 result = usbat_execute_command(us, command, 8);
505
506 if (result != USB_STOR_XFER_GOOD)
507 return USB_STOR_TRANSPORT_ERROR;
508
509 result = usbat_bulk_write(us, buf, len, use_sg);
510 if (result != USB_STOR_XFER_GOOD)
511 return USB_STOR_TRANSPORT_ERROR;
512
513 return usbat_wait_not_busy(us, minutes);
514 }
515
516 /*
517 * Process read and write requests
518 */
519 static int usbat_hp8200e_rw_block_test(struct us_data *us,
520 unsigned char access,
521 unsigned char *registers,
522 unsigned char *data_out,
523 unsigned short num_registers,
524 unsigned char data_reg,
525 unsigned char status_reg,
526 unsigned char timeout,
527 unsigned char qualifier,
528 int direction,
529 void *buf,
530 unsigned short len,
531 int use_sg,
532 int minutes)
533 {
534 int result;
535 unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
536 us->recv_bulk_pipe : us->send_bulk_pipe;
537
538 unsigned char *command = us->iobuf;
539 int i, j;
540 int cmdlen;
541 unsigned char *data = us->iobuf;
542 unsigned char *status = us->iobuf;
543
544 BUG_ON(num_registers > US_IOBUF_SIZE/2);
545
546 for (i=0; i<20; i++) {
547
548 /*
549 * The first time we send the full command, which consists
550 * of downloading the SCSI command followed by downloading
551 * the data via a write-and-test. Any other time we only
552 * send the command to download the data -- the SCSI command
553 * is still 'active' in some sense in the device.
554 *
555 * We're only going to try sending the data 10 times. After
556 * that, we just return a failure.
557 */
558
559 if (i==0) {
560 cmdlen = 16;
561 /*
562 * Write to multiple registers
563 * Not really sure the 0x07, 0x17, 0xfc, 0xe7 is
564 * necessary here, but that's what came out of the
565 * trace every single time.
566 */
567 command[0] = 0x40;
568 command[1] = access | USBAT_CMD_WRITE_REGS;
569 command[2] = 0x07;
570 command[3] = 0x17;
571 command[4] = 0xFC;
572 command[5] = 0xE7;
573 command[6] = LSB_of(num_registers*2);
574 command[7] = MSB_of(num_registers*2);
575 } else
576 cmdlen = 8;
577
578 /* Conditionally read or write blocks */
579 command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
580 command[cmdlen-7] = access |
581 (direction==DMA_TO_DEVICE ?
582 USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK);
583 command[cmdlen-6] = data_reg;
584 command[cmdlen-5] = status_reg;
585 command[cmdlen-4] = timeout;
586 command[cmdlen-3] = qualifier;
587 command[cmdlen-2] = LSB_of(len);
588 command[cmdlen-1] = MSB_of(len);
589
590 result = usbat_execute_command(us, command, cmdlen);
591
592 if (result != USB_STOR_XFER_GOOD)
593 return USB_STOR_TRANSPORT_ERROR;
594
595 if (i==0) {
596
597 for (j=0; j<num_registers; j++) {
598 data[j<<1] = registers[j];
599 data[1+(j<<1)] = data_out[j];
600 }
601
602 result = usbat_bulk_write(us, data, num_registers*2, 0);
603 if (result != USB_STOR_XFER_GOOD)
604 return USB_STOR_TRANSPORT_ERROR;
605
606 }
607
608 result = usb_stor_bulk_transfer_sg(us,
609 pipe, buf, len, use_sg, NULL);
610
611 /*
612 * If we get a stall on the bulk download, we'll retry
613 * the bulk download -- but not the SCSI command because
614 * in some sense the SCSI command is still 'active' and
615 * waiting for the data. Don't ask me why this should be;
616 * I'm only following what the Windoze driver did.
617 *
618 * Note that a stall for the test-and-read/write command means
619 * that the test failed. In this case we're testing to make
620 * sure that the device is error-free
621 * (i.e. bit 0 -- CHK -- of status is 0). The most likely
622 * hypothesis is that the USBAT chip somehow knows what
623 * the device will accept, but doesn't give the device any
624 * data until all data is received. Thus, the device would
625 * still be waiting for the first byte of data if a stall
626 * occurs, even if the stall implies that some data was
627 * transferred.
628 */
629
630 if (result == USB_STOR_XFER_SHORT ||
631 result == USB_STOR_XFER_STALLED) {
632
633 /*
634 * If we're reading and we stalled, then clear
635 * the bulk output pipe only the first time.
636 */
637
638 if (direction==DMA_FROM_DEVICE && i==0) {
639 if (usb_stor_clear_halt(us,
640 us->send_bulk_pipe) < 0)
641 return USB_STOR_TRANSPORT_ERROR;
642 }
643
644 /*
645 * Read status: is the device angry, or just busy?
646 */
647
648 result = usbat_read(us, USBAT_ATA,
649 direction==DMA_TO_DEVICE ?
650 USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS,
651 status);
652
653 if (result!=USB_STOR_XFER_GOOD)
654 return USB_STOR_TRANSPORT_ERROR;
655 if (*status & 0x01) /* check condition */
656 return USB_STOR_TRANSPORT_FAILED;
657 if (*status & 0x20) /* device fault */
658 return USB_STOR_TRANSPORT_FAILED;
659
660 US_DEBUGP("Redoing %s\n",
661 direction==DMA_TO_DEVICE ? "write" : "read");
662
663 } else if (result != USB_STOR_XFER_GOOD)
664 return USB_STOR_TRANSPORT_ERROR;
665 else
666 return usbat_wait_not_busy(us, minutes);
667
668 }
669
670 US_DEBUGP("Bummer! %s bulk data 20 times failed.\n",
671 direction==DMA_TO_DEVICE ? "Writing" : "Reading");
672
673 return USB_STOR_TRANSPORT_FAILED;
674 }
675
676 /*
677 * Write to multiple registers:
678 * Allows us to write specific data to any registers. The data to be written
679 * gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN
680 * which gets sent through bulk out.
681 * Not designed for large transfers of data!
682 */
683 static int usbat_multiple_write(struct us_data *us,
684 unsigned char *registers,
685 unsigned char *data_out,
686 unsigned short num_registers)
687 {
688 int i, result;
689 unsigned char *data = us->iobuf;
690 unsigned char *command = us->iobuf;
691
692 BUG_ON(num_registers > US_IOBUF_SIZE/2);
693
694 /* Write to multiple registers, ATA access */
695 command[0] = 0x40;
696 command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
697
698 /* No relevance */
699 command[2] = 0;
700 command[3] = 0;
701 command[4] = 0;
702 command[5] = 0;
703
704 /* Number of bytes to be transferred (incl. addresses and data) */
705 command[6] = LSB_of(num_registers*2);
706 command[7] = MSB_of(num_registers*2);
707
708 /* The setup command */
709 result = usbat_execute_command(us, command, 8);
710 if (result != USB_STOR_XFER_GOOD)
711 return USB_STOR_TRANSPORT_ERROR;
712
713 /* Create the reg/data, reg/data sequence */
714 for (i=0; i<num_registers; i++) {
715 data[i<<1] = registers[i];
716 data[1+(i<<1)] = data_out[i];
717 }
718
719 /* Send the data */
720 result = usbat_bulk_write(us, data, num_registers*2, 0);
721 if (result != USB_STOR_XFER_GOOD)
722 return USB_STOR_TRANSPORT_ERROR;
723
724 if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
725 return usbat_wait_not_busy(us, 0);
726 else
727 return USB_STOR_TRANSPORT_GOOD;
728 }
729
730 /*
731 * Conditionally read blocks from device:
732 * Allows us to read blocks from a specific data register, based upon the
733 * condition that a status register can be successfully masked with a status
734 * qualifier. If this condition is not initially met, the read will wait
735 * up until a maximum amount of time has elapsed, as specified by timeout.
736 * The read will start when the condition is met, otherwise the command aborts.
737 *
738 * The qualifier defined here is not the value that is masked, it defines
739 * conditions for the write to take place. The actual masked qualifier (and
740 * other related details) are defined beforehand with _set_shuttle_features().
741 */
742 static int usbat_read_blocks(struct us_data *us,
743 void* buffer,
744 int len,
745 int use_sg)
746 {
747 int result;
748 unsigned char *command = us->iobuf;
749
750 command[0] = 0xC0;
751 command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
752 command[2] = USBAT_ATA_DATA;
753 command[3] = USBAT_ATA_STATUS;
754 command[4] = 0xFD; /* Timeout (ms); */
755 command[5] = USBAT_QUAL_FCQ;
756 command[6] = LSB_of(len);
757 command[7] = MSB_of(len);
758
759 /* Multiple block read setup command */
760 result = usbat_execute_command(us, command, 8);
761 if (result != USB_STOR_XFER_GOOD)
762 return USB_STOR_TRANSPORT_FAILED;
763
764 /* Read the blocks we just asked for */
765 result = usbat_bulk_read(us, buffer, len, use_sg);
766 if (result != USB_STOR_XFER_GOOD)
767 return USB_STOR_TRANSPORT_FAILED;
768
769 return USB_STOR_TRANSPORT_GOOD;
770 }
771
772 /*
773 * Conditionally write blocks to device:
774 * Allows us to write blocks to a specific data register, based upon the
775 * condition that a status register can be successfully masked with a status
776 * qualifier. If this condition is not initially met, the write will wait
777 * up until a maximum amount of time has elapsed, as specified by timeout.
778 * The read will start when the condition is met, otherwise the command aborts.
779 *
780 * The qualifier defined here is not the value that is masked, it defines
781 * conditions for the write to take place. The actual masked qualifier (and
782 * other related details) are defined beforehand with _set_shuttle_features().
783 */
784 static int usbat_write_blocks(struct us_data *us,
785 void* buffer,
786 int len,
787 int use_sg)
788 {
789 int result;
790 unsigned char *command = us->iobuf;
791
792 command[0] = 0x40;
793 command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
794 command[2] = USBAT_ATA_DATA;
795 command[3] = USBAT_ATA_STATUS;
796 command[4] = 0xFD; /* Timeout (ms) */
797 command[5] = USBAT_QUAL_FCQ;
798 command[6] = LSB_of(len);
799 command[7] = MSB_of(len);
800
801 /* Multiple block write setup command */
802 result = usbat_execute_command(us, command, 8);
803 if (result != USB_STOR_XFER_GOOD)
804 return USB_STOR_TRANSPORT_FAILED;
805
806 /* Write the data */
807 result = usbat_bulk_write(us, buffer, len, use_sg);
808 if (result != USB_STOR_XFER_GOOD)
809 return USB_STOR_TRANSPORT_FAILED;
810
811 return USB_STOR_TRANSPORT_GOOD;
812 }
813
814 /*
815 * Read the User IO register
816 */
817 static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
818 {
819 int result;
820
821 result = usb_stor_ctrl_transfer(us,
822 us->recv_ctrl_pipe,
823 USBAT_CMD_UIO,
824 0xC0,
825 0,
826 0,
827 data_flags,
828 USBAT_UIO_READ);
829
830 US_DEBUGP("usbat_read_user_io: UIO register reads %02X\n", (unsigned short) (*data_flags));
831
832 return result;
833 }
834
835 /*
836 * Write to the User IO register
837 */
838 static int usbat_write_user_io(struct us_data *us,
839 unsigned char enable_flags,
840 unsigned char data_flags)
841 {
842 return usb_stor_ctrl_transfer(us,
843 us->send_ctrl_pipe,
844 USBAT_CMD_UIO,
845 0x40,
846 short_pack(enable_flags, data_flags),
847 0,
848 NULL,
849 USBAT_UIO_WRITE);
850 }
851
852 /*
853 * Reset the device
854 * Often needed on media change.
855 */
856 static int usbat_device_reset(struct us_data *us)
857 {
858 int rc;
859
860 /*
861 * Reset peripheral, enable peripheral control signals
862 * (bring reset signal up)
863 */
864 rc = usbat_write_user_io(us,
865 USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
866 USBAT_UIO_EPAD | USBAT_UIO_1);
867 if (rc != USB_STOR_XFER_GOOD)
868 return USB_STOR_TRANSPORT_ERROR;
869
870 /*
871 * Enable peripheral control signals
872 * (bring reset signal down)
873 */
874 rc = usbat_write_user_io(us,
875 USBAT_UIO_OE1 | USBAT_UIO_OE0,
876 USBAT_UIO_EPAD | USBAT_UIO_1);
877 if (rc != USB_STOR_XFER_GOOD)
878 return USB_STOR_TRANSPORT_ERROR;
879
880 return USB_STOR_TRANSPORT_GOOD;
881 }
882
883 /*
884 * Enable card detect
885 */
886 static int usbat_device_enable_cdt(struct us_data *us)
887 {
888 int rc;
889
890 /* Enable peripheral control signals and card detect */
891 rc = usbat_write_user_io(us,
892 USBAT_UIO_ACKD | USBAT_UIO_OE1 | USBAT_UIO_OE0,
893 USBAT_UIO_EPAD | USBAT_UIO_1);
894 if (rc != USB_STOR_XFER_GOOD)
895 return USB_STOR_TRANSPORT_ERROR;
896
897 return USB_STOR_TRANSPORT_GOOD;
898 }
899
900 /*
901 * Determine if media is present.
902 */
903 static int usbat_flash_check_media_present(unsigned char *uio)
904 {
905 if (*uio & USBAT_UIO_UI0) {
906 US_DEBUGP("usbat_flash_check_media_present: no media detected\n");
907 return USBAT_FLASH_MEDIA_NONE;
908 }
909
910 return USBAT_FLASH_MEDIA_CF;
911 }
912
913 /*
914 * Determine if media has changed since last operation
915 */
916 static int usbat_flash_check_media_changed(unsigned char *uio)
917 {
918 if (*uio & USBAT_UIO_0) {
919 US_DEBUGP("usbat_flash_check_media_changed: media change detected\n");
920 return USBAT_FLASH_MEDIA_CHANGED;
921 }
922
923 return USBAT_FLASH_MEDIA_SAME;
924 }
925
926 /*
927 * Check for media change / no media and handle the situation appropriately
928 */
929 static int usbat_flash_check_media(struct us_data *us,
930 struct usbat_info *info)
931 {
932 int rc;
933 unsigned char *uio = us->iobuf;
934
935 rc = usbat_read_user_io(us, uio);
936 if (rc != USB_STOR_XFER_GOOD)
937 return USB_STOR_TRANSPORT_ERROR;
938
939 /* Check for media existence */
940 rc = usbat_flash_check_media_present(uio);
941 if (rc == USBAT_FLASH_MEDIA_NONE) {
942 info->sense_key = 0x02;
943 info->sense_asc = 0x3A;
944 info->sense_ascq = 0x00;
945 return USB_STOR_TRANSPORT_FAILED;
946 }
947
948 /* Check for media change */
949 rc = usbat_flash_check_media_changed(uio);
950 if (rc == USBAT_FLASH_MEDIA_CHANGED) {
951
952 /* Reset and re-enable card detect */
953 rc = usbat_device_reset(us);
954 if (rc != USB_STOR_TRANSPORT_GOOD)
955 return rc;
956 rc = usbat_device_enable_cdt(us);
957 if (rc != USB_STOR_TRANSPORT_GOOD)
958 return rc;
959
960 msleep(50);
961
962 rc = usbat_read_user_io(us, uio);
963 if (rc != USB_STOR_XFER_GOOD)
964 return USB_STOR_TRANSPORT_ERROR;
965
966 info->sense_key = UNIT_ATTENTION;
967 info->sense_asc = 0x28;
968 info->sense_ascq = 0x00;
969 return USB_STOR_TRANSPORT_FAILED;
970 }
971
972 return USB_STOR_TRANSPORT_GOOD;
973 }
974
975 /*
976 * Determine whether we are controlling a flash-based reader/writer,
977 * or a HP8200-based CD drive.
978 * Sets transport functions as appropriate.
979 */
980 static int usbat_identify_device(struct us_data *us,
981 struct usbat_info *info)
982 {
983 int rc;
984 unsigned char status;
985
986 if (!us || !info)
987 return USB_STOR_TRANSPORT_ERROR;
988
989 rc = usbat_device_reset(us);
990 if (rc != USB_STOR_TRANSPORT_GOOD)
991 return rc;
992 msleep(500);
993
994 /*
995 * In attempt to distinguish between HP CDRW's and Flash readers, we now
996 * execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash
997 * readers), this command should fail with error. On ATAPI devices (i.e.
998 * CDROM drives), it should succeed.
999 */
1000 rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1);
1001 if (rc != USB_STOR_XFER_GOOD)
1002 return USB_STOR_TRANSPORT_ERROR;
1003
1004 rc = usbat_get_status(us, &status);
1005 if (rc != USB_STOR_XFER_GOOD)
1006 return USB_STOR_TRANSPORT_ERROR;
1007
1008 /* Check for error bit, or if the command 'fell through' */
1009 if (status == 0xA1 || !(status & 0x01)) {
1010 /* Device is HP 8200 */
1011 US_DEBUGP("usbat_identify_device: Detected HP8200 CDRW\n");
1012 info->devicetype = USBAT_DEV_HP8200;
1013 } else {
1014 /* Device is a CompactFlash reader/writer */
1015 US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
1016 info->devicetype = USBAT_DEV_FLASH;
1017 }
1018
1019 return USB_STOR_TRANSPORT_GOOD;
1020 }
1021
1022 /*
1023 * Set the transport function based on the device type
1024 */
1025 static int usbat_set_transport(struct us_data *us,
1026 struct usbat_info *info,
1027 int devicetype)
1028 {
1029
1030 if (!info->devicetype)
1031 info->devicetype = devicetype;
1032
1033 if (!info->devicetype)
1034 usbat_identify_device(us, info);
1035
1036 switch (info->devicetype) {
1037 default:
1038 return USB_STOR_TRANSPORT_ERROR;
1039
1040 case USBAT_DEV_HP8200:
1041 us->transport = usbat_hp8200e_transport;
1042 break;
1043
1044 case USBAT_DEV_FLASH:
1045 us->transport = usbat_flash_transport;
1046 break;
1047 }
1048
1049 return 0;
1050 }
1051
1052 /*
1053 * Read the media capacity
1054 */
1055 static int usbat_flash_get_sector_count(struct us_data *us,
1056 struct usbat_info *info)
1057 {
1058 unsigned char registers[3] = {
1059 USBAT_ATA_SECCNT,
1060 USBAT_ATA_DEVICE,
1061 USBAT_ATA_CMD,
1062 };
1063 unsigned char command[3] = { 0x01, 0xA0, 0xEC };
1064 unsigned char *reply;
1065 unsigned char status;
1066 int rc;
1067
1068 if (!us || !info)
1069 return USB_STOR_TRANSPORT_ERROR;
1070
1071 reply = kmalloc(512, GFP_NOIO);
1072 if (!reply)
1073 return USB_STOR_TRANSPORT_ERROR;
1074
1075 /* ATA command : IDENTIFY DEVICE */
1076 rc = usbat_multiple_write(us, registers, command, 3);
1077 if (rc != USB_STOR_XFER_GOOD) {
1078 US_DEBUGP("usbat_flash_get_sector_count: Gah! identify_device failed\n");
1079 rc = USB_STOR_TRANSPORT_ERROR;
1080 goto leave;
1081 }
1082
1083 /* Read device status */
1084 if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
1085 rc = USB_STOR_TRANSPORT_ERROR;
1086 goto leave;
1087 }
1088
1089 msleep(100);
1090
1091 /* Read the device identification data */
1092 rc = usbat_read_block(us, reply, 512, 0);
1093 if (rc != USB_STOR_TRANSPORT_GOOD)
1094 goto leave;
1095
1096 info->sectors = ((u32)(reply[117]) << 24) |
1097 ((u32)(reply[116]) << 16) |
1098 ((u32)(reply[115]) << 8) |
1099 ((u32)(reply[114]) );
1100
1101 rc = USB_STOR_TRANSPORT_GOOD;
1102
1103 leave:
1104 kfree(reply);
1105 return rc;
1106 }
1107
1108 /*
1109 * Read data from device
1110 */
1111 static int usbat_flash_read_data(struct us_data *us,
1112 struct usbat_info *info,
1113 u32 sector,
1114 u32 sectors)
1115 {
1116 unsigned char registers[7] = {
1117 USBAT_ATA_FEATURES,
1118 USBAT_ATA_SECCNT,
1119 USBAT_ATA_SECNUM,
1120 USBAT_ATA_LBA_ME,
1121 USBAT_ATA_LBA_HI,
1122 USBAT_ATA_DEVICE,
1123 USBAT_ATA_STATUS,
1124 };
1125 unsigned char command[7];
1126 unsigned char *buffer;
1127 unsigned char thistime;
1128 unsigned int totallen, alloclen;
1129 int len, result;
1130 unsigned int sg_offset = 0;
1131 struct scatterlist *sg = NULL;
1132
1133 result = usbat_flash_check_media(us, info);
1134 if (result != USB_STOR_TRANSPORT_GOOD)
1135 return result;
1136
1137 /*
1138 * we're working in LBA mode. according to the ATA spec,
1139 * we can support up to 28-bit addressing. I don't know if Jumpshot
1140 * supports beyond 24-bit addressing. It's kind of hard to test
1141 * since it requires > 8GB CF card.
1142 */
1143
1144 if (sector > 0x0FFFFFFF)
1145 return USB_STOR_TRANSPORT_ERROR;
1146
1147 totallen = sectors * info->ssize;
1148
1149 /*
1150 * Since we don't read more than 64 KB at a time, we have to create
1151 * a bounce buffer and move the data a piece at a time between the
1152 * bounce buffer and the actual transfer buffer.
1153 */
1154
1155 alloclen = min(totallen, 65536u);
1156 buffer = kmalloc(alloclen, GFP_NOIO);
1157 if (buffer == NULL)
1158 return USB_STOR_TRANSPORT_ERROR;
1159
1160 do {
1161 /*
1162 * loop, never allocate or transfer more than 64k at once
1163 * (min(128k, 255*info->ssize) is the real limit)
1164 */
1165 len = min(totallen, alloclen);
1166 thistime = (len / info->ssize) & 0xff;
1167
1168 /* ATA command 0x20 (READ SECTORS) */
1169 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20);
1170
1171 /* Write/execute ATA read command */
1172 result = usbat_multiple_write(us, registers, command, 7);
1173 if (result != USB_STOR_TRANSPORT_GOOD)
1174 goto leave;
1175
1176 /* Read the data we just requested */
1177 result = usbat_read_blocks(us, buffer, len, 0);
1178 if (result != USB_STOR_TRANSPORT_GOOD)
1179 goto leave;
1180
1181 US_DEBUGP("usbat_flash_read_data: %d bytes\n", len);
1182
1183 /* Store the data in the transfer buffer */
1184 usb_stor_access_xfer_buf(buffer, len, us->srb,
1185 &sg, &sg_offset, TO_XFER_BUF);
1186
1187 sector += thistime;
1188 totallen -= len;
1189 } while (totallen > 0);
1190
1191 kfree(buffer);
1192 return USB_STOR_TRANSPORT_GOOD;
1193
1194 leave:
1195 kfree(buffer);
1196 return USB_STOR_TRANSPORT_ERROR;
1197 }
1198
1199 /*
1200 * Write data to device
1201 */
1202 static int usbat_flash_write_data(struct us_data *us,
1203 struct usbat_info *info,
1204 u32 sector,
1205 u32 sectors)
1206 {
1207 unsigned char registers[7] = {
1208 USBAT_ATA_FEATURES,
1209 USBAT_ATA_SECCNT,
1210 USBAT_ATA_SECNUM,
1211 USBAT_ATA_LBA_ME,
1212 USBAT_ATA_LBA_HI,
1213 USBAT_ATA_DEVICE,
1214 USBAT_ATA_STATUS,
1215 };
1216 unsigned char command[7];
1217 unsigned char *buffer;
1218 unsigned char thistime;
1219 unsigned int totallen, alloclen;
1220 int len, result;
1221 unsigned int sg_offset = 0;
1222 struct scatterlist *sg = NULL;
1223
1224 result = usbat_flash_check_media(us, info);
1225 if (result != USB_STOR_TRANSPORT_GOOD)
1226 return result;
1227
1228 /*
1229 * we're working in LBA mode. according to the ATA spec,
1230 * we can support up to 28-bit addressing. I don't know if the device
1231 * supports beyond 24-bit addressing. It's kind of hard to test
1232 * since it requires > 8GB media.
1233 */
1234
1235 if (sector > 0x0FFFFFFF)
1236 return USB_STOR_TRANSPORT_ERROR;
1237
1238 totallen = sectors * info->ssize;
1239
1240 /*
1241 * Since we don't write more than 64 KB at a time, we have to create
1242 * a bounce buffer and move the data a piece at a time between the
1243 * bounce buffer and the actual transfer buffer.
1244 */
1245
1246 alloclen = min(totallen, 65536u);
1247 buffer = kmalloc(alloclen, GFP_NOIO);
1248 if (buffer == NULL)
1249 return USB_STOR_TRANSPORT_ERROR;
1250
1251 do {
1252 /*
1253 * loop, never allocate or transfer more than 64k at once
1254 * (min(128k, 255*info->ssize) is the real limit)
1255 */
1256 len = min(totallen, alloclen);
1257 thistime = (len / info->ssize) & 0xff;
1258
1259 /* Get the data from the transfer buffer */
1260 usb_stor_access_xfer_buf(buffer, len, us->srb,
1261 &sg, &sg_offset, FROM_XFER_BUF);
1262
1263 /* ATA command 0x30 (WRITE SECTORS) */
1264 usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
1265
1266 /* Write/execute ATA write command */
1267 result = usbat_multiple_write(us, registers, command, 7);
1268 if (result != USB_STOR_TRANSPORT_GOOD)
1269 goto leave;
1270
1271 /* Write the data */
1272 result = usbat_write_blocks(us, buffer, len, 0);
1273 if (result != USB_STOR_TRANSPORT_GOOD)
1274 goto leave;
1275
1276 sector += thistime;
1277 totallen -= len;
1278 } while (totallen > 0);
1279
1280 kfree(buffer);
1281 return result;
1282
1283 leave:
1284 kfree(buffer);
1285 return USB_STOR_TRANSPORT_ERROR;
1286 }
1287
1288 /*
1289 * Squeeze a potentially huge (> 65535 byte) read10 command into
1290 * a little ( <= 65535 byte) ATAPI pipe
1291 */
1292 static int usbat_hp8200e_handle_read10(struct us_data *us,
1293 unsigned char *registers,
1294 unsigned char *data,
1295 struct scsi_cmnd *srb)
1296 {
1297 int result = USB_STOR_TRANSPORT_GOOD;
1298 unsigned char *buffer;
1299 unsigned int len;
1300 unsigned int sector;
1301 unsigned int sg_offset = 0;
1302 struct scatterlist *sg = NULL;
1303
1304 US_DEBUGP("handle_read10: transfersize %d\n",
1305 srb->transfersize);
1306
1307 if (scsi_bufflen(srb) < 0x10000) {
1308
1309 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1310 registers, data, 19,
1311 USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1312 (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1313 DMA_FROM_DEVICE,
1314 scsi_sglist(srb),
1315 scsi_bufflen(srb), scsi_sg_count(srb), 1);
1316
1317 return result;
1318 }
1319
1320 /*
1321 * Since we're requesting more data than we can handle in
1322 * a single read command (max is 64k-1), we will perform
1323 * multiple reads, but each read must be in multiples of
1324 * a sector. Luckily the sector size is in srb->transfersize
1325 * (see linux/drivers/scsi/sr.c).
1326 */
1327
1328 if (data[7+0] == GPCMD_READ_CD) {
1329 len = short_pack(data[7+9], data[7+8]);
1330 len <<= 16;
1331 len |= data[7+7];
1332 US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len);
1333 srb->transfersize = scsi_bufflen(srb)/len;
1334 }
1335
1336 if (!srb->transfersize) {
1337 srb->transfersize = 2048; /* A guess */
1338 US_DEBUGP("handle_read10: transfersize 0, forcing %d\n",
1339 srb->transfersize);
1340 }
1341
1342 /*
1343 * Since we only read in one block at a time, we have to create
1344 * a bounce buffer and move the data a piece at a time between the
1345 * bounce buffer and the actual transfer buffer.
1346 */
1347
1348 len = (65535/srb->transfersize) * srb->transfersize;
1349 US_DEBUGP("Max read is %d bytes\n", len);
1350 len = min(len, scsi_bufflen(srb));
1351 buffer = kmalloc(len, GFP_NOIO);
1352 if (buffer == NULL) /* bloody hell! */
1353 return USB_STOR_TRANSPORT_FAILED;
1354 sector = short_pack(data[7+3], data[7+2]);
1355 sector <<= 16;
1356 sector |= short_pack(data[7+5], data[7+4]);
1357 transferred = 0;
1358
1359 while (transferred != scsi_bufflen(srb)) {
1360
1361 if (len > scsi_bufflen(srb) - transferred)
1362 len = scsi_bufflen(srb) - transferred;
1363
1364 data[3] = len&0xFF; /* (cylL) = expected length (L) */
1365 data[4] = (len>>8)&0xFF; /* (cylH) = expected length (H) */
1366
1367 /* Fix up the SCSI command sector and num sectors */
1368
1369 data[7+2] = MSB_of(sector>>16); /* SCSI command sector */
1370 data[7+3] = LSB_of(sector>>16);
1371 data[7+4] = MSB_of(sector&0xFFFF);
1372 data[7+5] = LSB_of(sector&0xFFFF);
1373 if (data[7+0] == GPCMD_READ_CD)
1374 data[7+6] = 0;
1375 data[7+7] = MSB_of(len / srb->transfersize); /* SCSI command */
1376 data[7+8] = LSB_of(len / srb->transfersize); /* num sectors */
1377
1378 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1379 registers, data, 19,
1380 USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1381 (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1382 DMA_FROM_DEVICE,
1383 buffer,
1384 len, 0, 1);
1385
1386 if (result != USB_STOR_TRANSPORT_GOOD)
1387 break;
1388
1389 /* Store the data in the transfer buffer */
1390 usb_stor_access_xfer_buf(buffer, len, srb,
1391 &sg, &sg_offset, TO_XFER_BUF);
1392
1393 /* Update the amount transferred and the sector number */
1394
1395 transferred += len;
1396 sector += len / srb->transfersize;
1397
1398 } /* while transferred != scsi_bufflen(srb) */
1399
1400 kfree(buffer);
1401 return result;
1402 }
1403
1404 static int usbat_select_and_test_registers(struct us_data *us)
1405 {
1406 int selector;
1407 unsigned char *status = us->iobuf;
1408
1409 /* try device = master, then device = slave. */
1410 for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
1411 if (usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
1412 USB_STOR_XFER_GOOD)
1413 return USB_STOR_TRANSPORT_ERROR;
1414
1415 if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) !=
1416 USB_STOR_XFER_GOOD)
1417 return USB_STOR_TRANSPORT_ERROR;
1418
1419 if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) !=
1420 USB_STOR_XFER_GOOD)
1421 return USB_STOR_TRANSPORT_ERROR;
1422
1423 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1424 USB_STOR_XFER_GOOD)
1425 return USB_STOR_TRANSPORT_ERROR;
1426
1427 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1428 USB_STOR_XFER_GOOD)
1429 return USB_STOR_TRANSPORT_ERROR;
1430
1431 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) !=
1432 USB_STOR_XFER_GOOD)
1433 return USB_STOR_TRANSPORT_ERROR;
1434
1435 if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) !=
1436 USB_STOR_XFER_GOOD)
1437 return USB_STOR_TRANSPORT_ERROR;
1438
1439 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1440 USB_STOR_XFER_GOOD)
1441 return USB_STOR_TRANSPORT_ERROR;
1442
1443 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1444 USB_STOR_XFER_GOOD)
1445 return USB_STOR_TRANSPORT_ERROR;
1446 }
1447
1448 return USB_STOR_TRANSPORT_GOOD;
1449 }
1450
1451 /*
1452 * Initialize the USBAT processor and the storage device
1453 */
1454 static int init_usbat(struct us_data *us, int devicetype)
1455 {
1456 int rc;
1457 struct usbat_info *info;
1458 unsigned char subcountH = USBAT_ATA_LBA_HI;
1459 unsigned char subcountL = USBAT_ATA_LBA_ME;
1460 unsigned char *status = us->iobuf;
1461
1462 us->extra = kzalloc(sizeof(struct usbat_info), GFP_NOIO);
1463 if (!us->extra) {
1464 US_DEBUGP("init_usbat: Gah! Can't allocate storage for usbat info struct!\n");
1465 return 1;
1466 }
1467 info = (struct usbat_info *) (us->extra);
1468
1469 /* Enable peripheral control signals */
1470 rc = usbat_write_user_io(us,
1471 USBAT_UIO_OE1 | USBAT_UIO_OE0,
1472 USBAT_UIO_EPAD | USBAT_UIO_1);
1473 if (rc != USB_STOR_XFER_GOOD)
1474 return USB_STOR_TRANSPORT_ERROR;
1475
1476 US_DEBUGP("INIT 1\n");
1477
1478 msleep(2000);
1479
1480 rc = usbat_read_user_io(us, status);
1481 if (rc != USB_STOR_TRANSPORT_GOOD)
1482 return rc;
1483
1484 US_DEBUGP("INIT 2\n");
1485
1486 rc = usbat_read_user_io(us, status);
1487 if (rc != USB_STOR_XFER_GOOD)
1488 return USB_STOR_TRANSPORT_ERROR;
1489
1490 rc = usbat_read_user_io(us, status);
1491 if (rc != USB_STOR_XFER_GOOD)
1492 return USB_STOR_TRANSPORT_ERROR;
1493
1494 US_DEBUGP("INIT 3\n");
1495
1496 rc = usbat_select_and_test_registers(us);
1497 if (rc != USB_STOR_TRANSPORT_GOOD)
1498 return rc;
1499
1500 US_DEBUGP("INIT 4\n");
1501
1502 rc = usbat_read_user_io(us, status);
1503 if (rc != USB_STOR_XFER_GOOD)
1504 return USB_STOR_TRANSPORT_ERROR;
1505
1506 US_DEBUGP("INIT 5\n");
1507
1508 /* Enable peripheral control signals and card detect */
1509 rc = usbat_device_enable_cdt(us);
1510 if (rc != USB_STOR_TRANSPORT_GOOD)
1511 return rc;
1512
1513 US_DEBUGP("INIT 6\n");
1514
1515 rc = usbat_read_user_io(us, status);
1516 if (rc != USB_STOR_XFER_GOOD)
1517 return USB_STOR_TRANSPORT_ERROR;
1518
1519 US_DEBUGP("INIT 7\n");
1520
1521 msleep(1400);
1522
1523 rc = usbat_read_user_io(us, status);
1524 if (rc != USB_STOR_XFER_GOOD)
1525 return USB_STOR_TRANSPORT_ERROR;
1526
1527 US_DEBUGP("INIT 8\n");
1528
1529 rc = usbat_select_and_test_registers(us);
1530 if (rc != USB_STOR_TRANSPORT_GOOD)
1531 return rc;
1532
1533 US_DEBUGP("INIT 9\n");
1534
1535 /* At this point, we need to detect which device we are using */
1536 if (usbat_set_transport(us, info, devicetype))
1537 return USB_STOR_TRANSPORT_ERROR;
1538
1539 US_DEBUGP("INIT 10\n");
1540
1541 if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
1542 subcountH = 0x02;
1543 subcountL = 0x00;
1544 }
1545 rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
1546 0x00, 0x88, 0x08, subcountH, subcountL);
1547 if (rc != USB_STOR_XFER_GOOD)
1548 return USB_STOR_TRANSPORT_ERROR;
1549
1550 US_DEBUGP("INIT 11\n");
1551
1552 return USB_STOR_TRANSPORT_GOOD;
1553 }
1554
1555 /*
1556 * Transport for the HP 8200e
1557 */
1558 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
1559 {
1560 int result;
1561 unsigned char *status = us->iobuf;
1562 unsigned char registers[32];
1563 unsigned char data[32];
1564 unsigned int len;
1565 int i;
1566
1567 len = scsi_bufflen(srb);
1568
1569 /* Send A0 (ATA PACKET COMMAND).
1570 Note: I guess we're never going to get any of the ATA
1571 commands... just ATA Packet Commands.
1572 */
1573
1574 registers[0] = USBAT_ATA_FEATURES;
1575 registers[1] = USBAT_ATA_SECCNT;
1576 registers[2] = USBAT_ATA_SECNUM;
1577 registers[3] = USBAT_ATA_LBA_ME;
1578 registers[4] = USBAT_ATA_LBA_HI;
1579 registers[5] = USBAT_ATA_DEVICE;
1580 registers[6] = USBAT_ATA_CMD;
1581 data[0] = 0x00;
1582 data[1] = 0x00;
1583 data[2] = 0x00;
1584 data[3] = len&0xFF; /* (cylL) = expected length (L) */
1585 data[4] = (len>>8)&0xFF; /* (cylH) = expected length (H) */
1586 data[5] = 0xB0; /* (device sel) = slave */
1587 data[6] = 0xA0; /* (command) = ATA PACKET COMMAND */
1588
1589 for (i=7; i<19; i++) {
1590 registers[i] = 0x10;
1591 data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
1592 }
1593
1594 result = usbat_get_status(us, status);
1595 US_DEBUGP("Status = %02X\n", *status);
1596 if (result != USB_STOR_XFER_GOOD)
1597 return USB_STOR_TRANSPORT_ERROR;
1598 if (srb->cmnd[0] == TEST_UNIT_READY)
1599 transferred = 0;
1600
1601 if (srb->sc_data_direction == DMA_TO_DEVICE) {
1602
1603 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
1604 registers, data, 19,
1605 USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
1606 (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
1607 DMA_TO_DEVICE,
1608 scsi_sglist(srb),
1609 len, scsi_sg_count(srb), 10);
1610
1611 if (result == USB_STOR_TRANSPORT_GOOD) {
1612 transferred += len;
1613 US_DEBUGP("Wrote %08X bytes\n", transferred);
1614 }
1615
1616 return result;
1617
1618 } else if (srb->cmnd[0] == READ_10 ||
1619 srb->cmnd[0] == GPCMD_READ_CD) {
1620
1621 return usbat_hp8200e_handle_read10(us, registers, data, srb);
1622
1623 }
1624
1625 if (len > 0xFFFF) {
1626 US_DEBUGP("Error: len = %08X... what do I do now?\n",
1627 len);
1628 return USB_STOR_TRANSPORT_ERROR;
1629 }
1630
1631 if ( (result = usbat_multiple_write(us,
1632 registers, data, 7)) != USB_STOR_TRANSPORT_GOOD) {
1633 return result;
1634 }
1635
1636 /*
1637 * Write the 12-byte command header.
1638 *
1639 * If the command is BLANK then set the timer for 75 minutes.
1640 * Otherwise set it for 10 minutes.
1641 *
1642 * NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
1643 * AT SPEED 4 IS UNRELIABLE!!!
1644 */
1645
1646 if ((result = usbat_write_block(us,
1647 USBAT_ATA, srb->cmnd, 12,
1648 (srb->cmnd[0]==GPCMD_BLANK ? 75 : 10), 0) !=
1649 USB_STOR_TRANSPORT_GOOD)) {
1650 return result;
1651 }
1652
1653 /* If there is response data to be read in then do it here. */
1654
1655 if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
1656
1657 /* How many bytes to read in? Check cylL register */
1658
1659 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
1660 USB_STOR_XFER_GOOD) {
1661 return USB_STOR_TRANSPORT_ERROR;
1662 }
1663
1664 if (len > 0xFF) { /* need to read cylH also */
1665 len = *status;
1666 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
1667 USB_STOR_XFER_GOOD) {
1668 return USB_STOR_TRANSPORT_ERROR;
1669 }
1670 len += ((unsigned int) *status)<<8;
1671 }
1672 else
1673 len = *status;
1674
1675
1676 result = usbat_read_block(us, scsi_sglist(srb), len,
1677 scsi_sg_count(srb));
1678 }
1679
1680 return result;
1681 }
1682
1683 /*
1684 * Transport for USBAT02-based CompactFlash and similar storage devices
1685 */
1686 static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
1687 {
1688 int rc;
1689 struct usbat_info *info = (struct usbat_info *) (us->extra);
1690 unsigned long block, blocks;
1691 unsigned char *ptr = us->iobuf;
1692 static unsigned char inquiry_response[36] = {
1693 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
1694 };
1695
1696 if (srb->cmnd[0] == INQUIRY) {
1697 US_DEBUGP("usbat_flash_transport: INQUIRY. Returning bogus response.\n");
1698 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
1699 fill_inquiry_response(us, ptr, 36);
1700 return USB_STOR_TRANSPORT_GOOD;
1701 }
1702
1703 if (srb->cmnd[0] == READ_CAPACITY) {
1704 rc = usbat_flash_check_media(us, info);
1705 if (rc != USB_STOR_TRANSPORT_GOOD)
1706 return rc;
1707
1708 rc = usbat_flash_get_sector_count(us, info);
1709 if (rc != USB_STOR_TRANSPORT_GOOD)
1710 return rc;
1711
1712 /* hard coded 512 byte sectors as per ATA spec */
1713 info->ssize = 0x200;
1714 US_DEBUGP("usbat_flash_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
1715 info->sectors, info->ssize);
1716
1717 /*
1718 * build the reply
1719 * note: must return the sector number of the last sector,
1720 * *not* the total number of sectors
1721 */
1722 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
1723 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
1724 usb_stor_set_xfer_buf(ptr, 8, srb);
1725
1726 return USB_STOR_TRANSPORT_GOOD;
1727 }
1728
1729 if (srb->cmnd[0] == MODE_SELECT_10) {
1730 US_DEBUGP("usbat_flash_transport: Gah! MODE_SELECT_10.\n");
1731 return USB_STOR_TRANSPORT_ERROR;
1732 }
1733
1734 if (srb->cmnd[0] == READ_10) {
1735 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1736 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1737
1738 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1739
1740 US_DEBUGP("usbat_flash_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
1741 return usbat_flash_read_data(us, info, block, blocks);
1742 }
1743
1744 if (srb->cmnd[0] == READ_12) {
1745 /*
1746 * I don't think we'll ever see a READ_12 but support it anyway
1747 */
1748 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1749 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1750
1751 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1752 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
1753
1754 US_DEBUGP("usbat_flash_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
1755 return usbat_flash_read_data(us, info, block, blocks);
1756 }
1757
1758 if (srb->cmnd[0] == WRITE_10) {
1759 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1760 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1761
1762 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
1763
1764 US_DEBUGP("usbat_flash_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
1765 return usbat_flash_write_data(us, info, block, blocks);
1766 }
1767
1768 if (srb->cmnd[0] == WRITE_12) {
1769 /*
1770 * I don't think we'll ever see a WRITE_12 but support it anyway
1771 */
1772 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
1773 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
1774
1775 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
1776 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
1777
1778 US_DEBUGP("usbat_flash_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
1779 return usbat_flash_write_data(us, info, block, blocks);
1780 }
1781
1782
1783 if (srb->cmnd[0] == TEST_UNIT_READY) {
1784 US_DEBUGP("usbat_flash_transport: TEST_UNIT_READY.\n");
1785
1786 rc = usbat_flash_check_media(us, info);
1787 if (rc != USB_STOR_TRANSPORT_GOOD)
1788 return rc;
1789
1790 return usbat_check_status(us);
1791 }
1792
1793 if (srb->cmnd[0] == REQUEST_SENSE) {
1794 US_DEBUGP("usbat_flash_transport: REQUEST_SENSE.\n");
1795
1796 memset(ptr, 0, 18);
1797 ptr[0] = 0xF0;
1798 ptr[2] = info->sense_key;
1799 ptr[7] = 11;
1800 ptr[12] = info->sense_asc;
1801 ptr[13] = info->sense_ascq;
1802 usb_stor_set_xfer_buf(ptr, 18, srb);
1803
1804 return USB_STOR_TRANSPORT_GOOD;
1805 }
1806
1807 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
1808 /*
1809 * sure. whatever. not like we can stop the user from popping
1810 * the media out of the device (no locking doors, etc)
1811 */
1812 return USB_STOR_TRANSPORT_GOOD;
1813 }
1814
1815 US_DEBUGP("usbat_flash_transport: Gah! Unknown command: %d (0x%x)\n",
1816 srb->cmnd[0], srb->cmnd[0]);
1817 info->sense_key = 0x05;
1818 info->sense_asc = 0x20;
1819 info->sense_ascq = 0x00;
1820 return USB_STOR_TRANSPORT_FAILED;
1821 }
1822
1823 static int init_usbat_cd(struct us_data *us)
1824 {
1825 return init_usbat(us, USBAT_DEV_HP8200);
1826 }
1827
1828 static int init_usbat_flash(struct us_data *us)
1829 {
1830 return init_usbat(us, USBAT_DEV_FLASH);
1831 }
1832
1833 static int usbat_probe(struct usb_interface *intf,
1834 const struct usb_device_id *id)
1835 {
1836 struct us_data *us;
1837 int result;
1838
1839 result = usb_stor_probe1(&us, intf, id,
1840 (id - usbat_usb_ids) + usbat_unusual_dev_list);
1841 if (result)
1842 return result;
1843
1844 /* The actual transport will be determined later by the
1845 * initialization routine; this is just a placeholder.
1846 */
1847 us->transport_name = "Shuttle USBAT";
1848 us->transport = usbat_flash_transport;
1849 us->transport_reset = usb_stor_CB_reset;
1850 us->max_lun = 1;
1851
1852 result = usb_stor_probe2(us);
1853 return result;
1854 }
1855
1856 static struct usb_driver usbat_driver = {
1857 .name = "ums-usbat",
1858 .probe = usbat_probe,
1859 .disconnect = usb_stor_disconnect,
1860 .suspend = usb_stor_suspend,
1861 .resume = usb_stor_resume,
1862 .reset_resume = usb_stor_reset_resume,
1863 .pre_reset = usb_stor_pre_reset,
1864 .post_reset = usb_stor_post_reset,
1865 .id_table = usbat_usb_ids,
1866 .soft_unbind = 1,
1867 };
1868
1869 static int __init usbat_init(void)
1870 {
1871 return usb_register(&usbat_driver);
1872 }
1873
1874 static void __exit usbat_exit(void)
1875 {
1876 usb_deregister(&usbat_driver);
1877 }
1878
1879 module_init(usbat_init);
1880 module_exit(usbat_exit);
Support for the Chinese Samsung S3C2440 based development boards