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Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
[linux-2.6-block.git] / drivers / usb / image / microtek.c
CommitLineData
1da177e4
LT		 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-existant 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>
1da177e4
LT		 124#include <linux/signal.h>
125#include <linux/errno.h>
126#include <linux/random.h>
127#include <linux/poll.h>
128#include <linux/init.h>
129#include <linux/slab.h>
130#include <linux/spinlock.h>
1da177e4
LT		 131#include <linux/usb.h>
132#include <linux/proc_fs.h>
133
134#include <asm/atomic.h>
135#include <linux/blkdev.h>
136#include "../../scsi/scsi.h"
137#include <scsi/scsi_host.h>
138
139#include "microtek.h"
140
141/*
142 * Version Information
143 */
144#define DRIVER_VERSION "v0.4.3"
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 struct usb_device_id mts_usb_ids [];
159
160static struct usb_driver mts_usb_driver = {
1da177e4
LT		 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() \
96e12fce 188 MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ )
1da177e4
LT		 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 ); \
b44cd112 192 MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
1da177e4
LT		 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
0eebe6ac 226static inline void mts_show_command(struct scsi_cmnd *srb)
1da177e4
LT		 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( " %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
304 srb->cmnd[0], srb->cmnd[1], srb->cmnd[2], srb->cmnd[3], srb->cmnd[4], srb->cmnd[5],
305 srb->cmnd[6], srb->cmnd[7], srb->cmnd[8], srb->cmnd[9]);
306}
307
308#else
309
0eebe6ac 310static inline void mts_show_command(struct scsi_cmnd * dummy)
1da177e4
LT		 311{
312}
313
314static inline void mts_debug_dump(struct mts_desc* dummy)
315{
316}
317
318#endif
319
320static inline void mts_urb_abort(struct mts_desc* desc) {
321 MTS_DEBUG_GOT_HERE();
322 mts_debug_dump(desc);
323
324 usb_kill_urb( desc->urb );
325}
326
9142d59a
ON		 327static int mts_slave_alloc (struct scsi_device *s)
328{
329 s->inquiry_len = 0x24;
330 return 0;
331}
332
333static int mts_slave_configure (struct scsi_device *s)
334{
335 blk_queue_dma_alignment(s->request_queue, (512 - 1));
336 return 0;
337}
338
0eebe6ac 339static int mts_scsi_abort(struct scsi_cmnd *srb)
1da177e4
LT		 340{
341 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
342
343 MTS_DEBUG_GOT_HERE();
344
345 mts_urb_abort(desc);
346
275cfdf4 347 return FAILED;
1da177e4
LT		 348}
349
0eebe6ac 350static int mts_scsi_host_reset(struct scsi_cmnd *srb)
1da177e4
LT		 351{
352 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
011b15df 353 int result;
1da177e4
LT		 354
355 MTS_DEBUG_GOT_HERE();
356 mts_debug_dump(desc);
357
011b15df
AS		 358 result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
359 if (result == 0) {
360 result = usb_reset_device(desc->usb_dev);
1da177e4 361 usb_unlock_device(desc->usb_dev);
011b15df 362 }
1da177e4
LT		 363 return result ? FAILED : SUCCESS;
364}
365
0eebe6ac
HK		 366static int
367mts_scsi_queuecommand(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback);
1da177e4
LT		 368
369static void mts_transfer_cleanup( struct urb *transfer );
7d12e780 370static void mts_do_sg(struct urb * transfer);
1da177e4 371
77933d72 372static inline
1da177e4
LT		 373void mts_int_submit_urb (struct urb* transfer,
374 int pipe,
375 void* data,
376 unsigned length,
377 usb_complete_t callback )
378/* Interrupt context! */
379
380/* Holding transfer->context->lock! */
381{
382 int res;
383
384 MTS_INT_INIT();
385
386 usb_fill_bulk_urb(transfer,
387 context->instance->usb_dev,
388 pipe,
389 data,
390 length,
391 callback,
392 context
393 );
394
1da177e4
LT		 395 res = usb_submit_urb( transfer, GFP_ATOMIC );
396 if ( unlikely(res) ) {
397 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
398 context->srb->result = DID_ERROR << 16;
399 mts_transfer_cleanup(transfer);
400 }
401 return;
402}
403
404
405static void mts_transfer_cleanup( struct urb *transfer )
406/* Interrupt context! */
407{
408 MTS_INT_INIT();
409
410 if ( likely(context->final_callback != NULL) )
411 context->final_callback(context->srb);
412
413}
414
7d12e780 415static void mts_transfer_done( struct urb *transfer )
1da177e4
LT		 416{
417 MTS_INT_INIT();
418
419 context->srb->result &= MTS_SCSI_ERR_MASK;
9142d59a 420 context->srb->result |= (unsigned)(*context->scsi_status)<<1;
1da177e4
LT		 421
422 mts_transfer_cleanup(transfer);
423
424 return;
425}
426
427
428static void mts_get_status( struct urb *transfer )
429/* Interrupt context! */
430{
431 MTS_INT_INIT();
432
433 mts_int_submit_urb(transfer,
434 usb_rcvbulkpipe(context->instance->usb_dev,
435 context->instance->ep_response),
9142d59a 436 context->scsi_status,
1da177e4
LT		 437 1,
438 mts_transfer_done );
439}
440
7d12e780 441static void mts_data_done( struct urb* transfer )
1da177e4
LT		 442/* Interrupt context! */
443{
b44cd112 444 int status = transfer->status;
1da177e4
LT		 445 MTS_INT_INIT();
446
447 if ( context->data_length != transfer->actual_length ) {
afd9a033
BH		 448 scsi_set_resid(context->srb, context->data_length -
449 transfer->actual_length);
b44cd112
GKH		 450 } else if ( unlikely(status) ) {
451 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
1da177e4
LT		 452 }
453
454 mts_get_status(transfer);
455
456 return;
457}
458
459
7d12e780 460static void mts_command_done( struct urb *transfer )
1da177e4
LT		 461/* Interrupt context! */
462{
b44cd112 463 int status = transfer->status;
1da177e4
LT		 464 MTS_INT_INIT();
465
b44cd112
GKH		 466 if ( unlikely(status) ) {
467 if (status == -ENOENT) {
1da177e4
LT		 468 /* We are being killed */
469 MTS_DEBUG_GOT_HERE();
470 context->srb->result = DID_ABORT<<16;
471 } else {
472 /* A genuine error has occurred */
473 MTS_DEBUG_GOT_HERE();
474
475 context->srb->result = DID_ERROR<<16;
476 }
477 mts_transfer_cleanup(transfer);
478
479 return;
480 }
481
482 if (context->srb->cmnd[0] == REQUEST_SENSE) {
483 mts_int_submit_urb(transfer,
484 context->data_pipe,
485 context->srb->sense_buffer,
486 context->data_length,
487 mts_data_done);
488 } else { if ( context->data ) {
489 mts_int_submit_urb(transfer,
490 context->data_pipe,
491 context->data,
492 context->data_length,
afd9a033
BH		 493 scsi_sg_count(context->srb) > 1 ?
494 mts_do_sg : mts_data_done);
1da177e4
LT		 495 } else {
496 mts_get_status(transfer);
497 }
498 }
499
500 return;
501}
502
7d12e780 503static void mts_do_sg (struct urb* transfer)
1da177e4
LT		 504{
505 struct scatterlist * sg;
b44cd112 506 int status = transfer->status;
1da177e4
LT		 507 MTS_INT_INIT();
508
afd9a033
BH		 509 MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
510 scsi_sg_count(context->srb));
1da177e4 511
b44cd112
GKH		 512 if (unlikely(status)) {
513 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
1da177e4
LT		 514 mts_transfer_cleanup(transfer);
515 }
516
afd9a033 517 sg = scsi_sglist(context->srb);
1da177e4
LT		 518 context->fragment++;
519 mts_int_submit_urb(transfer,
520 context->data_pipe,
45711f1a 521 sg_virt(&sg[context->fragment]),
1da177e4 522 sg[context->fragment].length,
afd9a033
BH		 523 context->fragment + 1 == scsi_sg_count(context->srb) ?
524 mts_data_done : mts_do_sg);
1da177e4
LT		 525 return;
526}
527
528static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
529static const u8 mts_read_image_sig_len = 4;
530static const unsigned char mts_direction[256/8] = {
531 0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
532 0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
533 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
534 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
535};
536
537
538#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
539
540static void
0eebe6ac 541mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
1da177e4
LT		 542{
543 int pipe;
544 struct scatterlist * sg;
545
546 MTS_DEBUG_GOT_HERE();
547
548 desc->context.instance = desc;
549 desc->context.srb = srb;
550 desc->context.fragment = 0;
551
afd9a033
BH		 552 if (!scsi_bufflen(srb)) {
553 desc->context.data = NULL;
554 desc->context.data_length = 0;
555 return;
1da177e4 556 } else {
afd9a033 557 sg = scsi_sglist(srb);
45711f1a 558 desc->context.data = sg_virt(&sg[0]);
1da177e4
LT		 559 desc->context.data_length = sg[0].length;
560 }
561
562
563 /* can't rely on srb->sc_data_direction */
564
565 /* Brutally ripped from usb-storage */
566
567 if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
568) { pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
569 MTS_DEBUG( "transfering from desc->ep_image == %d\n",
570 (int)desc->ep_image );
571 } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
572 pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
573 MTS_DEBUG( "transfering from desc->ep_response == %d\n",
574 (int)desc->ep_response);
575 } else {
576 MTS_DEBUG("transfering to desc->ep_out == %d\n",
577 (int)desc->ep_out);
578 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
579 }
580 desc->context.data_pipe = pipe;
581}
582
583
0eebe6ac
HK		 584static int
585mts_scsi_queuecommand(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
1da177e4
LT		 586{
587 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
588 int err = 0;
589 int res;
590
591 MTS_DEBUG_GOT_HERE();
592 mts_show_command(srb);
593 mts_debug_dump(desc);
594
595 if ( srb->device->lun || srb->device->id || srb->device->channel ) {
596
597 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 );
598
599 MTS_DEBUG("this device doesn't exist\n");
600
601 srb->result = DID_BAD_TARGET << 16;
602
603 if(likely(callback != NULL))
604 callback(srb);
605
606 goto out;
607 }
608
609
610 usb_fill_bulk_urb(desc->urb,
611 desc->usb_dev,
612 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
613 srb->cmnd,
614 srb->cmd_len,
615 mts_command_done,
616 &desc->context
617 );
618
619
620 mts_build_transfer_context( srb, desc );
621 desc->context.final_callback = callback;
622
623 /* here we need ATOMIC as we are called with the iolock */
624 res=usb_submit_urb(desc->urb, GFP_ATOMIC);
625
626 if(unlikely(res)){
627 MTS_ERROR("error %d submitting URB\n",(int)res);
628 srb->result = DID_ERROR << 16;
629
630 if(likely(callback != NULL))
631 callback(srb);
632
633 }
1da177e4
LT		 634out:
635 return err;
636}
637
d0be4a7d 638static struct scsi_host_template mts_scsi_host_template = {
1da177e4
LT		 639 .module = THIS_MODULE,
640 .name = "microtekX6",
641 .proc_name = "microtekX6",
642 .queuecommand = mts_scsi_queuecommand,
643 .eh_abort_handler = mts_scsi_abort,
644 .eh_host_reset_handler = mts_scsi_host_reset,
645 .sg_tablesize = SG_ALL,
646 .can_queue = 1,
647 .this_id = -1,
648 .cmd_per_lun = 1,
649 .use_clustering = 1,
650 .emulated = 1,
9142d59a
ON		 651 .slave_alloc = mts_slave_alloc,
652 .slave_configure = mts_slave_configure,
653 .max_sectors= 256, /* 128 K */
1da177e4
LT		 654};
655
1da177e4
LT		 656/* The entries of microtek_table must correspond, line-by-line to
657 the entries of mts_supported_products[]. */
658
659static struct usb_device_id mts_usb_ids [] =
660{
661 { USB_DEVICE(0x4ce, 0x0300) },
662 { USB_DEVICE(0x5da, 0x0094) },
663 { USB_DEVICE(0x5da, 0x0099) },
664 { USB_DEVICE(0x5da, 0x009a) },
665 { USB_DEVICE(0x5da, 0x00a0) },
666 { USB_DEVICE(0x5da, 0x00a3) },
667 { USB_DEVICE(0x5da, 0x80a3) },
668 { USB_DEVICE(0x5da, 0x80ac) },
669 { USB_DEVICE(0x5da, 0x00b6) },
670 { } /* Terminating entry */
671};
672
673MODULE_DEVICE_TABLE (usb, mts_usb_ids);
674
675
676static int mts_usb_probe(struct usb_interface *intf,
677 const struct usb_device_id *id)
678{
679 int i;
680 int ep_out = -1;
681 int ep_in_set[3]; /* this will break if we have more than three endpoints
682 which is why we check */
683 int *ep_in_current = ep_in_set;
684 int err_retval = -ENOMEM;
685
686 struct mts_desc * new_desc;
1da177e4
LT		 687 struct usb_device *dev = interface_to_usbdev (intf);
688
689 /* the current altsetting on the interface we're probing */
690 struct usb_host_interface *altsetting;
691
692 MTS_DEBUG_GOT_HERE();
693 MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
694
695 MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
696 le16_to_cpu(dev->descriptor.idProduct),
697 le16_to_cpu(dev->descriptor.idVendor) );
698
699 MTS_DEBUG_GOT_HERE();
700
1da177e4
LT		 701 /* the current altsetting on the interface we're probing */
702 altsetting = intf->cur_altsetting;
703
704
705 /* Check if the config is sane */
706
707 if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
708 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
709 (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
710 return -ENODEV;
711 }
712
713 for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
714 if ((altsetting->endpoint[i].desc.bmAttributes &
715 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
716
717 MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
718 (int)altsetting->endpoint[i].desc.bEndpointAddress );
719 } else {
720 if (altsetting->endpoint[i].desc.bEndpointAddress &
721 USB_DIR_IN)
722 *ep_in_current++
723 = altsetting->endpoint[i].desc.bEndpointAddress &
724 USB_ENDPOINT_NUMBER_MASK;
725 else {
726 if ( ep_out != -1 ) {
727 MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
728 return -ENODEV;
729 }
730
731 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
732 USB_ENDPOINT_NUMBER_MASK;
733 }
734 }
735
736 }
737
738
739 if ( ep_out == -1 ) {
740 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
741 return -ENODEV;
742 }
9142d59a
ON		 743
744
61eded6e 745 new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
1da177e4
LT		 746 if (!new_desc)
747 goto out;
748
1da177e4
LT		 749 new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
750 if (!new_desc->urb)
751 goto out_kfree;
752
9142d59a
ON		 753 new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
754 if (!new_desc->context.scsi_status)
a3b1f50c 755 goto out_free_urb;
9142d59a 756
1da177e4
LT		 757 new_desc->usb_dev = dev;
758 new_desc->usb_intf = intf;
1da177e4
LT		 759
760 /* endpoints */
761 new_desc->ep_out = ep_out;
762 new_desc->ep_response = ep_in_set[0];
763 new_desc->ep_image = ep_in_set[1];
764
765 if ( new_desc->ep_out != MTS_EP_OUT )
766 MTS_WARNING( "will this work? Command EP is not usually %d\n",
767 (int)new_desc->ep_out );
768
769 if ( new_desc->ep_response != MTS_EP_RESPONSE )
770 MTS_WARNING( "will this work? Response EP is not usually %d\n",
771 (int)new_desc->ep_response );
772
773 if ( new_desc->ep_image != MTS_EP_IMAGE )
774 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
775 (int)new_desc->ep_image );
776
777 new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
778 sizeof(new_desc));
779 if (!new_desc->host)
a3b1f50c 780 goto out_kfree2;
1da177e4
LT		 781
782 new_desc->host->hostdata[0] = (unsigned long)new_desc;
5cf1973a 783 if (scsi_add_host(new_desc->host, &dev->dev)) {
1da177e4 784 err_retval = -EIO;
a3b1f50c 785 goto out_host_put;
1da177e4
LT		 786 }
787 scsi_scan_host(new_desc->host);
788
789 usb_set_intfdata(intf, new_desc);
790 return 0;
791
a3b1f50c
MK		 792 out_host_put:
793 scsi_host_put(new_desc->host);
9142d59a
ON		 794 out_kfree2:
795 kfree(new_desc->context.scsi_status);
1da177e4
LT		 796 out_free_urb:
797 usb_free_urb(new_desc->urb);
798 out_kfree:
799 kfree(new_desc);
800 out:
801 return err_retval;
802}
803
804static void mts_usb_disconnect (struct usb_interface *intf)
805{
806 struct mts_desc *desc = usb_get_intfdata(intf);
807
808 usb_set_intfdata(intf, NULL);
809
810 usb_kill_urb(desc->urb);
811 scsi_remove_host(desc->host);
812
813 scsi_host_put(desc->host);
814 usb_free_urb(desc->urb);
9142d59a 815 kfree(desc->context.scsi_status);
1da177e4
LT		 816 kfree(desc);
817}
818
819
820static int __init microtek_drv_init(void)
821{
822 return usb_register(&mts_usb_driver);
823}
824
825static void __exit microtek_drv_exit(void)
826{
827 usb_deregister(&mts_usb_driver);
828}
829
830module_init(microtek_drv_init);
831module_exit(microtek_drv_exit);
832
833MODULE_AUTHOR( DRIVER_AUTHOR );
834MODULE_DESCRIPTION( DRIVER_DESC );
835MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)