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1// SPDX-License-Identifier: GPL-2.0
2/* Driver for Microtek Scanmaker X6 USB scanner, and possibly others.
3 *
4 * (C) Copyright 2000 John Fremlin <vii@penguinpowered.com>
5 * (C) Copyright 2000 Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
6 *
7 * Parts shamelessly stolen from usb-storage and copyright by their
8 * authors. Thanks to Matt Dharm for giving us permission!
9 *
10 * This driver implements a SCSI host controller driver and a USB
11 * device driver. To avoid confusion, all the USB related stuff is
12 * prefixed by mts_usb_ and all the SCSI stuff by mts_scsi_.
13 *
14 * Microtek (www.microtek.com) did not release the specifications for
15 * their USB protocol to us, so we had to reverse engineer them. We
16 * don't know for which models they are valid.
17 *
18 * The X6 USB has three bulk endpoints, one output (0x1) down which
19 * commands and outgoing data are sent, and two input: 0x82 from which
20 * normal data is read from the scanner (in packets of maximum 32
21 * bytes) and from which the status byte is read, and 0x83 from which
22 * the results of a scan (or preview) are read in up to 64 * 1024 byte
23 * chunks by the Windows driver. We don't know how much it is possible
24 * to read at a time from 0x83.
25 *
26 * It seems possible to read (with URB transfers) everything from 0x82
27 * in one go, without bothering to read in 32 byte chunks.
28 *
29 * There seems to be an optimisation of a further READ implicit if
30 * you simply read from 0x83.
31 *
32 * Guessed protocol:
33 *
34 * Send raw SCSI command to EP 0x1
35 *
36 * If there is data to receive:
37 * If the command was READ datatype=image:
38 * Read a lot of data from EP 0x83
39 * Else:
40 * Read data from EP 0x82
41 * Else:
42 * If there is data to transmit:
43 * Write it to EP 0x1
44 *
45 * Read status byte from EP 0x82
46 *
47 * References:
48 *
49 * The SCSI command set for the scanner is available from
50 * ftp://ftp.microtek.com/microtek/devpack/
51 *
52 * Microtek NV sent us a more up to date version of the document. If
53 * you want it, just send mail.
54 *
55 * Status:
56 *
57 * Untested with multiple scanners.
58 * Untested on SMP.
59 * Untested on a bigendian machine.
60 *
61 * History:
62 *
63 * 20000417 starting history
64 * 20000417 fixed load oops
65 * 20000417 fixed unload oops
66 * 20000419 fixed READ IMAGE detection
67 * 20000424 started conversion to use URBs
68 * 20000502 handled short transfers as errors
69 * 20000513 rename and organisation of functions (john)
70 * 20000513 added IDs for all products supported by Windows driver (john)
71 * 20000514 Rewrote mts_scsi_queuecommand to use URBs (john)
72 * 20000514 Version 0.0.8j
73 * 20000514 Fix reporting of non-existent devices to SCSI layer (john)
74 * 20000514 Added MTS_DEBUG_INT (john)
75 * 20000514 Changed "usb-microtek" to "microtek" for consistency (john)
76 * 20000514 Stupid bug fixes (john)
77 * 20000514 Version 0.0.9j
78 * 20000515 Put transfer context and URB in mts_desc (john)
79 * 20000515 Added prelim turn off debugging support (john)
80 * 20000515 Version 0.0.10j
81 * 20000515 Fixed up URB allocation (clear URB on alloc) (john)
82 * 20000515 Version 0.0.11j
83 * 20000516 Removed unnecessary spinlock in mts_transfer_context (john)
84 * 20000516 Removed unnecessary up on instance lock in mts_remove_nolock (john)
85 * 20000516 Implemented (badly) scsi_abort (john)
86 * 20000516 Version 0.0.12j
87 * 20000517 Hopefully removed mts_remove_nolock quasideadlock (john)
88 * 20000517 Added mts_debug_dump to print ll USB info (john)
89 * 20000518 Tweaks and documentation updates (john)
90 * 20000518 Version 0.0.13j
91 * 20000518 Cleaned up abort handling (john)
92 * 20000523 Removed scsi_command and various scsi_..._resets (john)
93 * 20000523 Added unlink URB on scsi_abort, now OHCI supports it (john)
94 * 20000523 Fixed last tiresome compile warning (john)
95 * 20000523 Version 0.0.14j (though version 0.1 has come out?)
96 * 20000602 Added primitive reset
97 * 20000602 Version 0.2.0
98 * 20000603 various cosmetic changes
99 * 20000603 Version 0.2.1
100 * 20000620 minor cosmetic changes
101 * 20000620 Version 0.2.2
102 * 20000822 Hopefully fixed deadlock in mts_remove_nolock()
103 * 20000822 Fixed minor race in mts_transfer_cleanup()
104 * 20000822 Fixed deadlock on submission error in queuecommand
105 * 20000822 Version 0.2.3
106 * 20000913 Reduced module size if debugging is off
107 * 20000913 Version 0.2.4
108 * 20010210 New abort logic
109 * 20010210 Version 0.3.0
110 * 20010217 Merged scatter/gather
111 * 20010218 Version 0.4.0
112 * 20010218 Cosmetic fixes
113 * 20010218 Version 0.4.1
114 * 20010306 Abort while using scatter/gather
115 * 20010306 Version 0.4.2
116 * 20010311 Remove all timeouts and tidy up generally (john)
117 * 20010320 check return value of scsi_register()
118 * 20010320 Version 0.4.3
119 * 20010408 Identify version on module load.
120 * 20011003 Fix multiple requests
121 */
122
123#include <linux/module.h>
124#include <linux/kernel.h>
125#include <linux/signal.h>
126#include <linux/errno.h>
127#include <linux/random.h>
128#include <linux/poll.h>
129#include <linux/slab.h>
130#include <linux/spinlock.h>
131#include <linux/usb.h>
132#include <linux/proc_fs.h>
133#include <linux/atomic.h>
134#include <linux/blkdev.h>
135
136#include <scsi/scsi.h>
137#include <scsi/scsi_cmnd.h>
138#include <scsi/scsi_device.h>
139#include <scsi/scsi_eh.h>
140#include <scsi/scsi_host.h>
141#include <scsi/scsi_tcq.h>
142
143#include "microtek.h"
144
145#define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
146#define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
147
148/* Should we do debugging? */
149
150//#define MTS_DO_DEBUG
151
152/* USB layer driver interface */
153
154static int mts_usb_probe(struct usb_interface *intf,
155 const struct usb_device_id *id);
156static void mts_usb_disconnect(struct usb_interface *intf);
157
158static const struct usb_device_id mts_usb_ids[];
159
160static struct usb_driver mts_usb_driver = {
161 .name = "microtekX6",
162 .probe = mts_usb_probe,
163 .disconnect = mts_usb_disconnect,
164 .id_table = mts_usb_ids,
165};
166
167
168/* Internal driver stuff */
169
170#define MTS_VERSION "0.4.3"
171#define MTS_NAME "microtek usb (rev " MTS_VERSION "): "
172
173#define MTS_WARNING(x...) \
174 printk( KERN_WARNING MTS_NAME x )
175#define MTS_ERROR(x...) \
176 printk( KERN_ERR MTS_NAME x )
177#define MTS_INT_ERROR(x...) \
178 MTS_ERROR(x)
179#define MTS_MESSAGE(x...) \
180 printk( KERN_INFO MTS_NAME x )
181
182#if defined MTS_DO_DEBUG
183
184#define MTS_DEBUG(x...) \
185 printk( KERN_DEBUG MTS_NAME x )
186
187#define MTS_DEBUG_GOT_HERE() \
188 MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ )
189#define MTS_DEBUG_INT() \
190 do { MTS_DEBUG_GOT_HERE(); \
191 MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
192 MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
193 mts_debug_dump(context->instance);\
194 } while(0)
195#else
196
197#define MTS_NUL_STATEMENT do { } while(0)
198
199#define MTS_DEBUG(x...) MTS_NUL_STATEMENT
200#define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
201#define MTS_DEBUG_INT() MTS_NUL_STATEMENT
202
203#endif
204
205
206
207#define MTS_INT_INIT()\
208 struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
209 MTS_DEBUG_INT();\
210
211#ifdef MTS_DO_DEBUG
212
213static inline void mts_debug_dump(struct mts_desc* desc) {
214 MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n",
215 (int)desc,
216 (int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0]
217 );
218 MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n",
219 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
220 usb_rcvbulkpipe(desc->usb_dev,desc->ep_response),
221 usb_rcvbulkpipe(desc->usb_dev,desc->ep_image)
222 );
223}
224
225
226static inline void mts_show_command(struct scsi_cmnd *srb)
227{
228 char *what = NULL;
229
230 switch (srb->cmnd[0]) {
231 case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
232 case REZERO_UNIT: what = "REZERO_UNIT"; break;
233 case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
234 case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
235 case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
236 case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
237 case READ_6: what = "READ_6"; break;
238 case WRITE_6: what = "WRITE_6"; break;
239 case SEEK_6: what = "SEEK_6"; break;
240 case READ_REVERSE: what = "READ_REVERSE"; break;
241 case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
242 case SPACE: what = "SPACE"; break;
243 case INQUIRY: what = "INQUIRY"; break;
244 case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
245 case MODE_SELECT: what = "MODE_SELECT"; break;
246 case RESERVE: what = "RESERVE"; break;
247 case RELEASE: what = "RELEASE"; break;
248 case COPY: what = "COPY"; break;
249 case ERASE: what = "ERASE"; break;
250 case MODE_SENSE: what = "MODE_SENSE"; break;
251 case START_STOP: what = "START_STOP"; break;
252 case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
253 case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
254 case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
255 case SET_WINDOW: what = "SET_WINDOW"; break;
256 case READ_CAPACITY: what = "READ_CAPACITY"; break;
257 case READ_10: what = "READ_10"; break;
258 case WRITE_10: what = "WRITE_10"; break;
259 case SEEK_10: what = "SEEK_10"; break;
260 case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
261 case VERIFY: what = "VERIFY"; break;
262 case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
263 case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
264 case SEARCH_LOW: what = "SEARCH_LOW"; break;
265 case SET_LIMITS: what = "SET_LIMITS"; break;
266 case READ_POSITION: what = "READ_POSITION"; break;
267 case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
268 case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
269 case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
270 case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
271 case COMPARE: what = "COMPARE"; break;
272 case COPY_VERIFY: what = "COPY_VERIFY"; break;
273 case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
274 case READ_BUFFER: what = "READ_BUFFER"; break;
275 case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
276 case READ_LONG: what = "READ_LONG"; break;
277 case WRITE_LONG: what = "WRITE_LONG"; break;
278 case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
279 case WRITE_SAME: what = "WRITE_SAME"; break;
280 case READ_TOC: what = "READ_TOC"; break;
281 case LOG_SELECT: what = "LOG_SELECT"; break;
282 case LOG_SENSE: what = "LOG_SENSE"; break;
283 case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
284 case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
285 case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
286 case READ_12: what = "READ_12"; break;
287 case WRITE_12: what = "WRITE_12"; break;
288 case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
289 case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
290 case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
291 case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
292 case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
293 case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
294 case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
295 default:
296 MTS_DEBUG("can't decode command\n");
297 goto out;
298 break;
299 }
300 MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
301
302 out:
303 MTS_DEBUG( " %10ph\n", srb->cmnd);
304}
305
306#else
307
308static inline void mts_show_command(struct scsi_cmnd * dummy)
309{
310}
311
312static inline void mts_debug_dump(struct mts_desc* dummy)
313{
314}
315
316#endif
317
318static inline void mts_urb_abort(struct mts_desc* desc) {
319 MTS_DEBUG_GOT_HERE();
320 mts_debug_dump(desc);
321
322 usb_kill_urb( desc->urb );
323}
324
325static int mts_slave_alloc (struct scsi_device *s)
326{
327 s->inquiry_len = 0x24;
328 return 0;
329}
330
331static int mts_slave_configure (struct scsi_device *s)
332{
333 blk_queue_dma_alignment(s->request_queue, (512 - 1));
334 return 0;
335}
336
337static int mts_scsi_abort(struct scsi_cmnd *srb)
338{
339 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
340
341 MTS_DEBUG_GOT_HERE();
342
343 mts_urb_abort(desc);
344
345 return FAILED;
346}
347
348static int mts_scsi_host_reset(struct scsi_cmnd *srb)
349{
350 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
351 int result;
352
353 MTS_DEBUG_GOT_HERE();
354 mts_debug_dump(desc);
355
356 result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
357 if (result == 0) {
358 result = usb_reset_device(desc->usb_dev);
359 usb_unlock_device(desc->usb_dev);
360 }
361 return result ? FAILED : SUCCESS;
362}
363
364static int
365mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
366
367static void mts_transfer_cleanup( struct urb *transfer );
368static void mts_do_sg(struct urb * transfer);
369
370static inline
371void mts_int_submit_urb (struct urb* transfer,
372 int pipe,
373 void* data,
374 unsigned length,
375 usb_complete_t callback )
376/* Interrupt context! */
377
378/* Holding transfer->context->lock! */
379{
380 int res;
381
382 MTS_INT_INIT();
383
384 usb_fill_bulk_urb(transfer,
385 context->instance->usb_dev,
386 pipe,
387 data,
388 length,
389 callback,
390 context
391 );
392
393 res = usb_submit_urb( transfer, GFP_ATOMIC );
394 if ( unlikely(res) ) {
395 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
396 set_host_byte(context->srb, DID_ERROR);
397 mts_transfer_cleanup(transfer);
398 }
399}
400
401
402static void mts_transfer_cleanup( struct urb *transfer )
403/* Interrupt context! */
404{
405 MTS_INT_INIT();
406
407 if ( likely(context->final_callback != NULL) )
408 context->final_callback(context->srb);
409}
410
411static void mts_transfer_done( struct urb *transfer )
412{
413 MTS_INT_INIT();
414
415 context->srb->result &= MTS_SCSI_ERR_MASK;
416 context->srb->result |= (unsigned)(*context->scsi_status)<<1;
417
418 mts_transfer_cleanup(transfer);
419}
420
421
422static void mts_get_status( struct urb *transfer )
423/* Interrupt context! */
424{
425 MTS_INT_INIT();
426
427 mts_int_submit_urb(transfer,
428 usb_rcvbulkpipe(context->instance->usb_dev,
429 context->instance->ep_response),
430 context->scsi_status,
431 1,
432 mts_transfer_done );
433}
434
435static void mts_data_done( struct urb* transfer )
436/* Interrupt context! */
437{
438 int status = transfer->status;
439 MTS_INT_INIT();
440
441 if ( context->data_length != transfer->actual_length ) {
442 scsi_set_resid(context->srb, context->data_length -
443 transfer->actual_length);
444 } else if ( unlikely(status) ) {
445 set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR));
446 }
447
448 mts_get_status(transfer);
449}
450
451
452static void mts_command_done( struct urb *transfer )
453/* Interrupt context! */
454{
455 int status = transfer->status;
456 MTS_INT_INIT();
457
458 if ( unlikely(status) ) {
459 if (status == -ENOENT) {
460 /* We are being killed */
461 MTS_DEBUG_GOT_HERE();
462 set_host_byte(context->srb, DID_ABORT);
463 } else {
464 /* A genuine error has occurred */
465 MTS_DEBUG_GOT_HERE();
466
467 set_host_byte(context->srb, DID_ERROR);
468 }
469 mts_transfer_cleanup(transfer);
470
471 return;
472 }
473
474 if (context->srb->cmnd[0] == REQUEST_SENSE) {
475 mts_int_submit_urb(transfer,
476 context->data_pipe,
477 context->srb->sense_buffer,
478 context->data_length,
479 mts_data_done);
480 } else { if ( context->data ) {
481 mts_int_submit_urb(transfer,
482 context->data_pipe,
483 context->data,
484 context->data_length,
485 scsi_sg_count(context->srb) > 1 ?
486 mts_do_sg : mts_data_done);
487 } else {
488 mts_get_status(transfer);
489 }
490 }
491}
492
493static void mts_do_sg (struct urb* transfer)
494{
495 int status = transfer->status;
496 MTS_INT_INIT();
497
498 MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
499 scsi_sg_count(context->srb));
500
501 if (unlikely(status)) {
502 set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR));
503 mts_transfer_cleanup(transfer);
504 }
505
506 context->curr_sg = sg_next(context->curr_sg);
507 mts_int_submit_urb(transfer,
508 context->data_pipe,
509 sg_virt(context->curr_sg),
510 context->curr_sg->length,
511 sg_is_last(context->curr_sg) ?
512 mts_data_done : mts_do_sg);
513}
514
515static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
516static const u8 mts_read_image_sig_len = 4;
517static const unsigned char mts_direction[256/8] = {
518 0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
519 0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
520 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
521 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
522};
523
524
525#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
526
527static void
528mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
529{
530 int pipe;
531
532 MTS_DEBUG_GOT_HERE();
533
534 desc->context.instance = desc;
535 desc->context.srb = srb;
536
537 if (!scsi_bufflen(srb)) {
538 desc->context.data = NULL;
539 desc->context.data_length = 0;
540 return;
541 } else {
542 desc->context.curr_sg = scsi_sglist(srb);
543 desc->context.data = sg_virt(desc->context.curr_sg);
544 desc->context.data_length = desc->context.curr_sg->length;
545 }
546
547
548 /* can't rely on srb->sc_data_direction */
549
550 /* Brutally ripped from usb-storage */
551
552 if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
553) { pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
554 MTS_DEBUG( "transferring from desc->ep_image == %d\n",
555 (int)desc->ep_image );
556 } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
557 pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
558 MTS_DEBUG( "transferring from desc->ep_response == %d\n",
559 (int)desc->ep_response);
560 } else {
561 MTS_DEBUG("transferring to desc->ep_out == %d\n",
562 (int)desc->ep_out);
563 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
564 }
565 desc->context.data_pipe = pipe;
566}
567
568static int mts_scsi_queuecommand_lck(struct scsi_cmnd *srb)
569{
570 mts_scsi_cmnd_callback callback = scsi_done;
571 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
572 int res;
573
574 MTS_DEBUG_GOT_HERE();
575 mts_show_command(srb);
576 mts_debug_dump(desc);
577
578 if ( srb->device->lun || srb->device->id || srb->device->channel ) {
579
580 MTS_DEBUG("Command to LUN=%d ID=%d CHANNEL=%d from SCSI layer\n",(int)srb->device->lun,(int)srb->device->id, (int)srb->device->channel );
581
582 MTS_DEBUG("this device doesn't exist\n");
583
584 set_host_byte(srb, DID_BAD_TARGET);
585
586 if(likely(callback != NULL))
587 callback(srb);
588
589 goto out;
590 }
591
592
593 usb_fill_bulk_urb(desc->urb,
594 desc->usb_dev,
595 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
596 srb->cmnd,
597 srb->cmd_len,
598 mts_command_done,
599 &desc->context
600 );
601
602
603 mts_build_transfer_context( srb, desc );
604 desc->context.final_callback = callback;
605
606 /* here we need ATOMIC as we are called with the iolock */
607 res=usb_submit_urb(desc->urb, GFP_ATOMIC);
608
609 if(unlikely(res)){
610 MTS_ERROR("error %d submitting URB\n",(int)res);
611 set_host_byte(srb, DID_ERROR);
612
613 if(likely(callback != NULL))
614 callback(srb);
615
616 }
617out:
618 return 0;
619}
620
621static DEF_SCSI_QCMD(mts_scsi_queuecommand)
622
623static const struct scsi_host_template mts_scsi_host_template = {
624 .module = THIS_MODULE,
625 .name = "microtekX6",
626 .proc_name = "microtekX6",
627 .queuecommand = mts_scsi_queuecommand,
628 .eh_abort_handler = mts_scsi_abort,
629 .eh_host_reset_handler = mts_scsi_host_reset,
630 .sg_tablesize = SG_ALL,
631 .can_queue = 1,
632 .this_id = -1,
633 .emulated = 1,
634 .slave_alloc = mts_slave_alloc,
635 .slave_configure = mts_slave_configure,
636 .max_sectors= 256, /* 128 K */
637};
638
639/* The entries of microtek_table must correspond, line-by-line to
640 the entries of mts_supported_products[]. */
641
642static const struct usb_device_id mts_usb_ids[] =
643{
644 { USB_DEVICE(0x4ce, 0x0300) },
645 { USB_DEVICE(0x5da, 0x0094) },
646 { USB_DEVICE(0x5da, 0x0099) },
647 { USB_DEVICE(0x5da, 0x009a) },
648 { USB_DEVICE(0x5da, 0x00a0) },
649 { USB_DEVICE(0x5da, 0x00a3) },
650 { USB_DEVICE(0x5da, 0x80a3) },
651 { USB_DEVICE(0x5da, 0x80ac) },
652 { USB_DEVICE(0x5da, 0x00b6) },
653 { } /* Terminating entry */
654};
655
656MODULE_DEVICE_TABLE (usb, mts_usb_ids);
657
658
659static int mts_usb_probe(struct usb_interface *intf,
660 const struct usb_device_id *id)
661{
662 int i;
663 int ep_out = -1;
664 int ep_in_set[3]; /* this will break if we have more than three endpoints
665 which is why we check */
666 int *ep_in_current = ep_in_set;
667 int err_retval = -ENOMEM;
668
669 struct mts_desc * new_desc;
670 struct usb_device *dev = interface_to_usbdev (intf);
671
672 /* the current altsetting on the interface we're probing */
673 struct usb_host_interface *altsetting;
674
675 MTS_DEBUG_GOT_HERE();
676 MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
677
678 MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
679 le16_to_cpu(dev->descriptor.idProduct),
680 le16_to_cpu(dev->descriptor.idVendor) );
681
682 MTS_DEBUG_GOT_HERE();
683
684 /* the current altsetting on the interface we're probing */
685 altsetting = intf->cur_altsetting;
686
687
688 /* Check if the config is sane */
689
690 if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
691 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
692 (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
693 return -ENODEV;
694 }
695
696 for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
697 if ((altsetting->endpoint[i].desc.bmAttributes &
698 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
699
700 MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
701 (int)altsetting->endpoint[i].desc.bEndpointAddress );
702 } else {
703 if (altsetting->endpoint[i].desc.bEndpointAddress &
704 USB_DIR_IN)
705 *ep_in_current++
706 = altsetting->endpoint[i].desc.bEndpointAddress &
707 USB_ENDPOINT_NUMBER_MASK;
708 else {
709 if ( ep_out != -1 ) {
710 MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
711 return -ENODEV;
712 }
713
714 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
715 USB_ENDPOINT_NUMBER_MASK;
716 }
717 }
718
719 }
720
721 if (ep_in_current != &ep_in_set[2]) {
722 MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n");
723 return -ENODEV;
724 }
725
726 if ( ep_out == -1 ) {
727 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
728 return -ENODEV;
729 }
730
731
732 new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
733 if (!new_desc)
734 goto out;
735
736 new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
737 if (!new_desc->urb)
738 goto out_kfree;
739
740 new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
741 if (!new_desc->context.scsi_status)
742 goto out_free_urb;
743
744 new_desc->usb_dev = dev;
745 new_desc->usb_intf = intf;
746
747 /* endpoints */
748 new_desc->ep_out = ep_out;
749 new_desc->ep_response = ep_in_set[0];
750 new_desc->ep_image = ep_in_set[1];
751
752 if ( new_desc->ep_out != MTS_EP_OUT )
753 MTS_WARNING( "will this work? Command EP is not usually %d\n",
754 (int)new_desc->ep_out );
755
756 if ( new_desc->ep_response != MTS_EP_RESPONSE )
757 MTS_WARNING( "will this work? Response EP is not usually %d\n",
758 (int)new_desc->ep_response );
759
760 if ( new_desc->ep_image != MTS_EP_IMAGE )
761 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
762 (int)new_desc->ep_image );
763
764 new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
765 sizeof(new_desc));
766 if (!new_desc->host)
767 goto out_kfree2;
768
769 new_desc->host->hostdata[0] = (unsigned long)new_desc;
770 if (scsi_add_host(new_desc->host, &dev->dev)) {
771 err_retval = -EIO;
772 goto out_host_put;
773 }
774 scsi_scan_host(new_desc->host);
775
776 usb_set_intfdata(intf, new_desc);
777 return 0;
778
779 out_host_put:
780 scsi_host_put(new_desc->host);
781 out_kfree2:
782 kfree(new_desc->context.scsi_status);
783 out_free_urb:
784 usb_free_urb(new_desc->urb);
785 out_kfree:
786 kfree(new_desc);
787 out:
788 return err_retval;
789}
790
791static void mts_usb_disconnect (struct usb_interface *intf)
792{
793 struct mts_desc *desc = usb_get_intfdata(intf);
794
795 usb_set_intfdata(intf, NULL);
796
797 usb_kill_urb(desc->urb);
798 scsi_remove_host(desc->host);
799
800 scsi_host_put(desc->host);
801 usb_free_urb(desc->urb);
802 kfree(desc->context.scsi_status);
803 kfree(desc);
804}
805
806module_usb_driver(mts_usb_driver);
807
808MODULE_AUTHOR( DRIVER_AUTHOR );
809MODULE_DESCRIPTION( DRIVER_DESC );
810MODULE_LICENSE("GPL");
1/* Driver for Microtek Scanmaker X6 USB scanner, and possibly others.
2 *
3 * (C) Copyright 2000 John Fremlin <vii@penguinpowered.com>
4 * (C) Copyright 2000 Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
5 *
6 * Parts shamelessly stolen from usb-storage and copyright by their
7 * authors. Thanks to Matt Dharm for giving us permission!
8 *
9 * This driver implements a SCSI host controller driver and a USB
10 * device driver. To avoid confusion, all the USB related stuff is
11 * prefixed by mts_usb_ and all the SCSI stuff by mts_scsi_.
12 *
13 * Microtek (www.microtek.com) did not release the specifications for
14 * their USB protocol to us, so we had to reverse engineer them. We
15 * don't know for which models they are valid.
16 *
17 * The X6 USB has three bulk endpoints, one output (0x1) down which
18 * commands and outgoing data are sent, and two input: 0x82 from which
19 * normal data is read from the scanner (in packets of maximum 32
20 * bytes) and from which the status byte is read, and 0x83 from which
21 * the results of a scan (or preview) are read in up to 64 * 1024 byte
22 * chunks by the Windows driver. We don't know how much it is possible
23 * to read at a time from 0x83.
24 *
25 * It seems possible to read (with URB transfers) everything from 0x82
26 * in one go, without bothering to read in 32 byte chunks.
27 *
28 * There seems to be an optimisation of a further READ implicit if
29 * you simply read from 0x83.
30 *
31 * Guessed protocol:
32 *
33 * Send raw SCSI command to EP 0x1
34 *
35 * If there is data to receive:
36 * If the command was READ datatype=image:
37 * Read a lot of data from EP 0x83
38 * Else:
39 * Read data from EP 0x82
40 * Else:
41 * If there is data to transmit:
42 * Write it to EP 0x1
43 *
44 * Read status byte from EP 0x82
45 *
46 * References:
47 *
48 * The SCSI command set for the scanner is available from
49 * ftp://ftp.microtek.com/microtek/devpack/
50 *
51 * Microtek NV sent us a more up to date version of the document. If
52 * you want it, just send mail.
53 *
54 * Status:
55 *
56 * Untested with multiple scanners.
57 * Untested on SMP.
58 * Untested on a bigendian machine.
59 *
60 * History:
61 *
62 * 20000417 starting history
63 * 20000417 fixed load oops
64 * 20000417 fixed unload oops
65 * 20000419 fixed READ IMAGE detection
66 * 20000424 started conversion to use URBs
67 * 20000502 handled short transfers as errors
68 * 20000513 rename and organisation of functions (john)
69 * 20000513 added IDs for all products supported by Windows driver (john)
70 * 20000514 Rewrote mts_scsi_queuecommand to use URBs (john)
71 * 20000514 Version 0.0.8j
72 * 20000514 Fix reporting of non-existent devices to SCSI layer (john)
73 * 20000514 Added MTS_DEBUG_INT (john)
74 * 20000514 Changed "usb-microtek" to "microtek" for consistency (john)
75 * 20000514 Stupid bug fixes (john)
76 * 20000514 Version 0.0.9j
77 * 20000515 Put transfer context and URB in mts_desc (john)
78 * 20000515 Added prelim turn off debugging support (john)
79 * 20000515 Version 0.0.10j
80 * 20000515 Fixed up URB allocation (clear URB on alloc) (john)
81 * 20000515 Version 0.0.11j
82 * 20000516 Removed unnecessary spinlock in mts_transfer_context (john)
83 * 20000516 Removed unnecessary up on instance lock in mts_remove_nolock (john)
84 * 20000516 Implemented (badly) scsi_abort (john)
85 * 20000516 Version 0.0.12j
86 * 20000517 Hopefully removed mts_remove_nolock quasideadlock (john)
87 * 20000517 Added mts_debug_dump to print ll USB info (john)
88 * 20000518 Tweaks and documentation updates (john)
89 * 20000518 Version 0.0.13j
90 * 20000518 Cleaned up abort handling (john)
91 * 20000523 Removed scsi_command and various scsi_..._resets (john)
92 * 20000523 Added unlink URB on scsi_abort, now OHCI supports it (john)
93 * 20000523 Fixed last tiresome compile warning (john)
94 * 20000523 Version 0.0.14j (though version 0.1 has come out?)
95 * 20000602 Added primitive reset
96 * 20000602 Version 0.2.0
97 * 20000603 various cosmetic changes
98 * 20000603 Version 0.2.1
99 * 20000620 minor cosmetic changes
100 * 20000620 Version 0.2.2
101 * 20000822 Hopefully fixed deadlock in mts_remove_nolock()
102 * 20000822 Fixed minor race in mts_transfer_cleanup()
103 * 20000822 Fixed deadlock on submission error in queuecommand
104 * 20000822 Version 0.2.3
105 * 20000913 Reduced module size if debugging is off
106 * 20000913 Version 0.2.4
107 * 20010210 New abort logic
108 * 20010210 Version 0.3.0
109 * 20010217 Merged scatter/gather
110 * 20010218 Version 0.4.0
111 * 20010218 Cosmetic fixes
112 * 20010218 Version 0.4.1
113 * 20010306 Abort while using scatter/gather
114 * 20010306 Version 0.4.2
115 * 20010311 Remove all timeouts and tidy up generally (john)
116 * 20010320 check return value of scsi_register()
117 * 20010320 Version 0.4.3
118 * 20010408 Identify version on module load.
119 * 20011003 Fix multiple requests
120 */
121
122#include <linux/module.h>
123#include <linux/kernel.h>
124#include <linux/signal.h>
125#include <linux/errno.h>
126#include <linux/random.h>
127#include <linux/poll.h>
128#include <linux/slab.h>
129#include <linux/spinlock.h>
130#include <linux/usb.h>
131#include <linux/proc_fs.h>
132
133#include <linux/atomic.h>
134#include <linux/blkdev.h>
135#include "../../scsi/scsi.h"
136#include <scsi/scsi_host.h>
137
138#include "microtek.h"
139
140/*
141 * Version Information
142 */
143#define DRIVER_VERSION "v0.4.3"
144#define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
145#define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
146
147/* Should we do debugging? */
148
149//#define MTS_DO_DEBUG
150
151/* USB layer driver interface */
152
153static int mts_usb_probe(struct usb_interface *intf,
154 const struct usb_device_id *id);
155static void mts_usb_disconnect(struct usb_interface *intf);
156
157static const struct usb_device_id mts_usb_ids[];
158
159static struct usb_driver mts_usb_driver = {
160 .name = "microtekX6",
161 .probe = mts_usb_probe,
162 .disconnect = mts_usb_disconnect,
163 .id_table = mts_usb_ids,
164};
165
166
167/* Internal driver stuff */
168
169#define MTS_VERSION "0.4.3"
170#define MTS_NAME "microtek usb (rev " MTS_VERSION "): "
171
172#define MTS_WARNING(x...) \
173 printk( KERN_WARNING MTS_NAME x )
174#define MTS_ERROR(x...) \
175 printk( KERN_ERR MTS_NAME x )
176#define MTS_INT_ERROR(x...) \
177 MTS_ERROR(x)
178#define MTS_MESSAGE(x...) \
179 printk( KERN_INFO MTS_NAME x )
180
181#if defined MTS_DO_DEBUG
182
183#define MTS_DEBUG(x...) \
184 printk( KERN_DEBUG MTS_NAME x )
185
186#define MTS_DEBUG_GOT_HERE() \
187 MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ )
188#define MTS_DEBUG_INT() \
189 do { MTS_DEBUG_GOT_HERE(); \
190 MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
191 MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
192 mts_debug_dump(context->instance);\
193 } while(0)
194#else
195
196#define MTS_NUL_STATEMENT do { } while(0)
197
198#define MTS_DEBUG(x...) MTS_NUL_STATEMENT
199#define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
200#define MTS_DEBUG_INT() MTS_NUL_STATEMENT
201
202#endif
203
204
205
206#define MTS_INT_INIT()\
207 struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
208 MTS_DEBUG_INT();\
209
210#ifdef MTS_DO_DEBUG
211
212static inline void mts_debug_dump(struct mts_desc* desc) {
213 MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n",
214 (int)desc,
215 (int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0]
216 );
217 MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n",
218 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
219 usb_rcvbulkpipe(desc->usb_dev,desc->ep_response),
220 usb_rcvbulkpipe(desc->usb_dev,desc->ep_image)
221 );
222}
223
224
225static inline void mts_show_command(struct scsi_cmnd *srb)
226{
227 char *what = NULL;
228
229 switch (srb->cmnd[0]) {
230 case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
231 case REZERO_UNIT: what = "REZERO_UNIT"; break;
232 case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
233 case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
234 case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
235 case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
236 case READ_6: what = "READ_6"; break;
237 case WRITE_6: what = "WRITE_6"; break;
238 case SEEK_6: what = "SEEK_6"; break;
239 case READ_REVERSE: what = "READ_REVERSE"; break;
240 case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
241 case SPACE: what = "SPACE"; break;
242 case INQUIRY: what = "INQUIRY"; break;
243 case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
244 case MODE_SELECT: what = "MODE_SELECT"; break;
245 case RESERVE: what = "RESERVE"; break;
246 case RELEASE: what = "RELEASE"; break;
247 case COPY: what = "COPY"; break;
248 case ERASE: what = "ERASE"; break;
249 case MODE_SENSE: what = "MODE_SENSE"; break;
250 case START_STOP: what = "START_STOP"; break;
251 case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
252 case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
253 case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
254 case SET_WINDOW: what = "SET_WINDOW"; break;
255 case READ_CAPACITY: what = "READ_CAPACITY"; break;
256 case READ_10: what = "READ_10"; break;
257 case WRITE_10: what = "WRITE_10"; break;
258 case SEEK_10: what = "SEEK_10"; break;
259 case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
260 case VERIFY: what = "VERIFY"; break;
261 case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
262 case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
263 case SEARCH_LOW: what = "SEARCH_LOW"; break;
264 case SET_LIMITS: what = "SET_LIMITS"; break;
265 case READ_POSITION: what = "READ_POSITION"; break;
266 case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
267 case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
268 case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
269 case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
270 case COMPARE: what = "COMPARE"; break;
271 case COPY_VERIFY: what = "COPY_VERIFY"; break;
272 case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
273 case READ_BUFFER: what = "READ_BUFFER"; break;
274 case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
275 case READ_LONG: what = "READ_LONG"; break;
276 case WRITE_LONG: what = "WRITE_LONG"; break;
277 case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
278 case WRITE_SAME: what = "WRITE_SAME"; break;
279 case READ_TOC: what = "READ_TOC"; break;
280 case LOG_SELECT: what = "LOG_SELECT"; break;
281 case LOG_SENSE: what = "LOG_SENSE"; break;
282 case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
283 case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
284 case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
285 case READ_12: what = "READ_12"; break;
286 case WRITE_12: what = "WRITE_12"; break;
287 case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
288 case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
289 case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
290 case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
291 case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
292 case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
293 case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
294 default:
295 MTS_DEBUG("can't decode command\n");
296 goto out;
297 break;
298 }
299 MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
300
301 out:
302 MTS_DEBUG( " %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
303 srb->cmnd[0], srb->cmnd[1], srb->cmnd[2], srb->cmnd[3], srb->cmnd[4], srb->cmnd[5],
304 srb->cmnd[6], srb->cmnd[7], srb->cmnd[8], srb->cmnd[9]);
305}
306
307#else
308
309static inline void mts_show_command(struct scsi_cmnd * dummy)
310{
311}
312
313static inline void mts_debug_dump(struct mts_desc* dummy)
314{
315}
316
317#endif
318
319static inline void mts_urb_abort(struct mts_desc* desc) {
320 MTS_DEBUG_GOT_HERE();
321 mts_debug_dump(desc);
322
323 usb_kill_urb( desc->urb );
324}
325
326static int mts_slave_alloc (struct scsi_device *s)
327{
328 s->inquiry_len = 0x24;
329 return 0;
330}
331
332static int mts_slave_configure (struct scsi_device *s)
333{
334 blk_queue_dma_alignment(s->request_queue, (512 - 1));
335 return 0;
336}
337
338static int mts_scsi_abort(struct scsi_cmnd *srb)
339{
340 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
341
342 MTS_DEBUG_GOT_HERE();
343
344 mts_urb_abort(desc);
345
346 return FAILED;
347}
348
349static int mts_scsi_host_reset(struct scsi_cmnd *srb)
350{
351 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
352 int result;
353
354 MTS_DEBUG_GOT_HERE();
355 mts_debug_dump(desc);
356
357 result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
358 if (result == 0) {
359 result = usb_reset_device(desc->usb_dev);
360 usb_unlock_device(desc->usb_dev);
361 }
362 return result ? FAILED : SUCCESS;
363}
364
365static int
366mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
367
368static void mts_transfer_cleanup( struct urb *transfer );
369static void mts_do_sg(struct urb * transfer);
370
371static inline
372void mts_int_submit_urb (struct urb* transfer,
373 int pipe,
374 void* data,
375 unsigned length,
376 usb_complete_t callback )
377/* Interrupt context! */
378
379/* Holding transfer->context->lock! */
380{
381 int res;
382
383 MTS_INT_INIT();
384
385 usb_fill_bulk_urb(transfer,
386 context->instance->usb_dev,
387 pipe,
388 data,
389 length,
390 callback,
391 context
392 );
393
394 res = usb_submit_urb( transfer, GFP_ATOMIC );
395 if ( unlikely(res) ) {
396 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
397 context->srb->result = DID_ERROR << 16;
398 mts_transfer_cleanup(transfer);
399 }
400}
401
402
403static void mts_transfer_cleanup( struct urb *transfer )
404/* Interrupt context! */
405{
406 MTS_INT_INIT();
407
408 if ( likely(context->final_callback != NULL) )
409 context->final_callback(context->srb);
410}
411
412static void mts_transfer_done( struct urb *transfer )
413{
414 MTS_INT_INIT();
415
416 context->srb->result &= MTS_SCSI_ERR_MASK;
417 context->srb->result |= (unsigned)(*context->scsi_status)<<1;
418
419 mts_transfer_cleanup(transfer);
420}
421
422
423static void mts_get_status( struct urb *transfer )
424/* Interrupt context! */
425{
426 MTS_INT_INIT();
427
428 mts_int_submit_urb(transfer,
429 usb_rcvbulkpipe(context->instance->usb_dev,
430 context->instance->ep_response),
431 context->scsi_status,
432 1,
433 mts_transfer_done );
434}
435
436static void mts_data_done( struct urb* transfer )
437/* Interrupt context! */
438{
439 int status = transfer->status;
440 MTS_INT_INIT();
441
442 if ( context->data_length != transfer->actual_length ) {
443 scsi_set_resid(context->srb, context->data_length -
444 transfer->actual_length);
445 } else if ( unlikely(status) ) {
446 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
447 }
448
449 mts_get_status(transfer);
450}
451
452
453static void mts_command_done( struct urb *transfer )
454/* Interrupt context! */
455{
456 int status = transfer->status;
457 MTS_INT_INIT();
458
459 if ( unlikely(status) ) {
460 if (status == -ENOENT) {
461 /* We are being killed */
462 MTS_DEBUG_GOT_HERE();
463 context->srb->result = DID_ABORT<<16;
464 } else {
465 /* A genuine error has occurred */
466 MTS_DEBUG_GOT_HERE();
467
468 context->srb->result = DID_ERROR<<16;
469 }
470 mts_transfer_cleanup(transfer);
471
472 return;
473 }
474
475 if (context->srb->cmnd[0] == REQUEST_SENSE) {
476 mts_int_submit_urb(transfer,
477 context->data_pipe,
478 context->srb->sense_buffer,
479 context->data_length,
480 mts_data_done);
481 } else { if ( context->data ) {
482 mts_int_submit_urb(transfer,
483 context->data_pipe,
484 context->data,
485 context->data_length,
486 scsi_sg_count(context->srb) > 1 ?
487 mts_do_sg : mts_data_done);
488 } else {
489 mts_get_status(transfer);
490 }
491 }
492}
493
494static void mts_do_sg (struct urb* transfer)
495{
496 struct scatterlist * sg;
497 int status = transfer->status;
498 MTS_INT_INIT();
499
500 MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
501 scsi_sg_count(context->srb));
502
503 if (unlikely(status)) {
504 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
505 mts_transfer_cleanup(transfer);
506 }
507
508 sg = scsi_sglist(context->srb);
509 context->fragment++;
510 mts_int_submit_urb(transfer,
511 context->data_pipe,
512 sg_virt(&sg[context->fragment]),
513 sg[context->fragment].length,
514 context->fragment + 1 == scsi_sg_count(context->srb) ?
515 mts_data_done : mts_do_sg);
516}
517
518static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
519static const u8 mts_read_image_sig_len = 4;
520static const unsigned char mts_direction[256/8] = {
521 0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
522 0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
523 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
524 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
525};
526
527
528#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
529
530static void
531mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
532{
533 int pipe;
534 struct scatterlist * sg;
535
536 MTS_DEBUG_GOT_HERE();
537
538 desc->context.instance = desc;
539 desc->context.srb = srb;
540 desc->context.fragment = 0;
541
542 if (!scsi_bufflen(srb)) {
543 desc->context.data = NULL;
544 desc->context.data_length = 0;
545 return;
546 } else {
547 sg = scsi_sglist(srb);
548 desc->context.data = sg_virt(&sg[0]);
549 desc->context.data_length = sg[0].length;
550 }
551
552
553 /* can't rely on srb->sc_data_direction */
554
555 /* Brutally ripped from usb-storage */
556
557 if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
558) { pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
559 MTS_DEBUG( "transferring from desc->ep_image == %d\n",
560 (int)desc->ep_image );
561 } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
562 pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
563 MTS_DEBUG( "transferring from desc->ep_response == %d\n",
564 (int)desc->ep_response);
565 } else {
566 MTS_DEBUG("transferring to desc->ep_out == %d\n",
567 (int)desc->ep_out);
568 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
569 }
570 desc->context.data_pipe = pipe;
571}
572
573
574static int
575mts_scsi_queuecommand_lck(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
576{
577 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
578 int err = 0;
579 int res;
580
581 MTS_DEBUG_GOT_HERE();
582 mts_show_command(srb);
583 mts_debug_dump(desc);
584
585 if ( srb->device->lun || srb->device->id || srb->device->channel ) {
586
587 MTS_DEBUG("Command to LUN=%d ID=%d CHANNEL=%d from SCSI layer\n",(int)srb->device->lun,(int)srb->device->id, (int)srb->device->channel );
588
589 MTS_DEBUG("this device doesn't exist\n");
590
591 srb->result = DID_BAD_TARGET << 16;
592
593 if(likely(callback != NULL))
594 callback(srb);
595
596 goto out;
597 }
598
599
600 usb_fill_bulk_urb(desc->urb,
601 desc->usb_dev,
602 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
603 srb->cmnd,
604 srb->cmd_len,
605 mts_command_done,
606 &desc->context
607 );
608
609
610 mts_build_transfer_context( srb, desc );
611 desc->context.final_callback = callback;
612
613 /* here we need ATOMIC as we are called with the iolock */
614 res=usb_submit_urb(desc->urb, GFP_ATOMIC);
615
616 if(unlikely(res)){
617 MTS_ERROR("error %d submitting URB\n",(int)res);
618 srb->result = DID_ERROR << 16;
619
620 if(likely(callback != NULL))
621 callback(srb);
622
623 }
624out:
625 return err;
626}
627
628static DEF_SCSI_QCMD(mts_scsi_queuecommand)
629
630static struct scsi_host_template mts_scsi_host_template = {
631 .module = THIS_MODULE,
632 .name = "microtekX6",
633 .proc_name = "microtekX6",
634 .queuecommand = mts_scsi_queuecommand,
635 .eh_abort_handler = mts_scsi_abort,
636 .eh_host_reset_handler = mts_scsi_host_reset,
637 .sg_tablesize = SG_ALL,
638 .can_queue = 1,
639 .this_id = -1,
640 .cmd_per_lun = 1,
641 .use_clustering = 1,
642 .emulated = 1,
643 .slave_alloc = mts_slave_alloc,
644 .slave_configure = mts_slave_configure,
645 .max_sectors= 256, /* 128 K */
646};
647
648/* The entries of microtek_table must correspond, line-by-line to
649 the entries of mts_supported_products[]. */
650
651static const struct usb_device_id mts_usb_ids[] =
652{
653 { USB_DEVICE(0x4ce, 0x0300) },
654 { USB_DEVICE(0x5da, 0x0094) },
655 { USB_DEVICE(0x5da, 0x0099) },
656 { USB_DEVICE(0x5da, 0x009a) },
657 { USB_DEVICE(0x5da, 0x00a0) },
658 { USB_DEVICE(0x5da, 0x00a3) },
659 { USB_DEVICE(0x5da, 0x80a3) },
660 { USB_DEVICE(0x5da, 0x80ac) },
661 { USB_DEVICE(0x5da, 0x00b6) },
662 { } /* Terminating entry */
663};
664
665MODULE_DEVICE_TABLE (usb, mts_usb_ids);
666
667
668static int mts_usb_probe(struct usb_interface *intf,
669 const struct usb_device_id *id)
670{
671 int i;
672 int ep_out = -1;
673 int ep_in_set[3]; /* this will break if we have more than three endpoints
674 which is why we check */
675 int *ep_in_current = ep_in_set;
676 int err_retval = -ENOMEM;
677
678 struct mts_desc * new_desc;
679 struct usb_device *dev = interface_to_usbdev (intf);
680
681 /* the current altsetting on the interface we're probing */
682 struct usb_host_interface *altsetting;
683
684 MTS_DEBUG_GOT_HERE();
685 MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
686
687 MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
688 le16_to_cpu(dev->descriptor.idProduct),
689 le16_to_cpu(dev->descriptor.idVendor) );
690
691 MTS_DEBUG_GOT_HERE();
692
693 /* the current altsetting on the interface we're probing */
694 altsetting = intf->cur_altsetting;
695
696
697 /* Check if the config is sane */
698
699 if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
700 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
701 (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
702 return -ENODEV;
703 }
704
705 for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
706 if ((altsetting->endpoint[i].desc.bmAttributes &
707 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
708
709 MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
710 (int)altsetting->endpoint[i].desc.bEndpointAddress );
711 } else {
712 if (altsetting->endpoint[i].desc.bEndpointAddress &
713 USB_DIR_IN)
714 *ep_in_current++
715 = altsetting->endpoint[i].desc.bEndpointAddress &
716 USB_ENDPOINT_NUMBER_MASK;
717 else {
718 if ( ep_out != -1 ) {
719 MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
720 return -ENODEV;
721 }
722
723 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
724 USB_ENDPOINT_NUMBER_MASK;
725 }
726 }
727
728 }
729
730
731 if ( ep_out == -1 ) {
732 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
733 return -ENODEV;
734 }
735
736
737 new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
738 if (!new_desc)
739 goto out;
740
741 new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
742 if (!new_desc->urb)
743 goto out_kfree;
744
745 new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
746 if (!new_desc->context.scsi_status)
747 goto out_free_urb;
748
749 new_desc->usb_dev = dev;
750 new_desc->usb_intf = intf;
751
752 /* endpoints */
753 new_desc->ep_out = ep_out;
754 new_desc->ep_response = ep_in_set[0];
755 new_desc->ep_image = ep_in_set[1];
756
757 if ( new_desc->ep_out != MTS_EP_OUT )
758 MTS_WARNING( "will this work? Command EP is not usually %d\n",
759 (int)new_desc->ep_out );
760
761 if ( new_desc->ep_response != MTS_EP_RESPONSE )
762 MTS_WARNING( "will this work? Response EP is not usually %d\n",
763 (int)new_desc->ep_response );
764
765 if ( new_desc->ep_image != MTS_EP_IMAGE )
766 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
767 (int)new_desc->ep_image );
768
769 new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
770 sizeof(new_desc));
771 if (!new_desc->host)
772 goto out_kfree2;
773
774 new_desc->host->hostdata[0] = (unsigned long)new_desc;
775 if (scsi_add_host(new_desc->host, &dev->dev)) {
776 err_retval = -EIO;
777 goto out_host_put;
778 }
779 scsi_scan_host(new_desc->host);
780
781 usb_set_intfdata(intf, new_desc);
782 return 0;
783
784 out_host_put:
785 scsi_host_put(new_desc->host);
786 out_kfree2:
787 kfree(new_desc->context.scsi_status);
788 out_free_urb:
789 usb_free_urb(new_desc->urb);
790 out_kfree:
791 kfree(new_desc);
792 out:
793 return err_retval;
794}
795
796static void mts_usb_disconnect (struct usb_interface *intf)
797{
798 struct mts_desc *desc = usb_get_intfdata(intf);
799
800 usb_set_intfdata(intf, NULL);
801
802 usb_kill_urb(desc->urb);
803 scsi_remove_host(desc->host);
804
805 scsi_host_put(desc->host);
806 usb_free_urb(desc->urb);
807 kfree(desc->context.scsi_status);
808 kfree(desc);
809}
810
811module_usb_driver(mts_usb_driver);
812
813MODULE_AUTHOR( DRIVER_AUTHOR );
814MODULE_DESCRIPTION( DRIVER_DESC );
815MODULE_LICENSE("GPL");