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usb: microtek possible memleak fix
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
124#include <linux/sched.h>
125#include <linux/signal.h>
126#include <linux/errno.h>
127#include <linux/random.h>
128#include <linux/poll.h>
129#include <linux/init.h>
130#include <linux/slab.h>
131#include <linux/spinlock.h>
132#include <linux/smp_lock.h>
133#include <linux/usb.h>
134#include <linux/proc_fs.h>
135
136#include <asm/atomic.h>
137#include <linux/blkdev.h>
138#include "../../scsi/scsi.h"
139#include <scsi/scsi_host.h>
140
141#include "microtek.h"
142
143/*
144 * Version Information
145 */
146#define DRIVER_VERSION "v0.4.3"
147#define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
148#define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
149
150/* Should we do debugging? */
151
152//#define MTS_DO_DEBUG
153
154/* USB layer driver interface */
155
156static int mts_usb_probe(struct usb_interface *intf,
157 const struct usb_device_id *id);
158static void mts_usb_disconnect(struct usb_interface *intf);
159
160static struct usb_device_id mts_usb_ids [];
161
162static struct usb_driver mts_usb_driver = {
1da177e4
LT		 163 .name = "microtekX6",
164 .probe = mts_usb_probe,
165 .disconnect = mts_usb_disconnect,
166 .id_table = mts_usb_ids,
167};
168
169
170/* Internal driver stuff */
171
172#define MTS_VERSION "0.4.3"
173#define MTS_NAME "microtek usb (rev " MTS_VERSION "): "
174
175#define MTS_WARNING(x...) \
176 printk( KERN_WARNING MTS_NAME x )
177#define MTS_ERROR(x...) \
178 printk( KERN_ERR MTS_NAME x )
179#define MTS_INT_ERROR(x...) \
180 MTS_ERROR(x)
181#define MTS_MESSAGE(x...) \
182 printk( KERN_INFO MTS_NAME x )
183
184#if defined MTS_DO_DEBUG
185
186#define MTS_DEBUG(x...) \
187 printk( KERN_DEBUG MTS_NAME x )
188
189#define MTS_DEBUG_GOT_HERE() \
190 MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __PRETTY_FUNCTION__ )
191#define MTS_DEBUG_INT() \
192 do { MTS_DEBUG_GOT_HERE(); \
193 MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
194 MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",(int)transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
195 mts_debug_dump(context->instance);\
196 } while(0)
197#else
198
199#define MTS_NUL_STATEMENT do { } while(0)
200
201#define MTS_DEBUG(x...) MTS_NUL_STATEMENT
202#define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
203#define MTS_DEBUG_INT() MTS_NUL_STATEMENT
204
205#endif
206
207
208
209#define MTS_INT_INIT()\
210 struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
211 MTS_DEBUG_INT();\
212
213#ifdef MTS_DO_DEBUG
214
215static inline void mts_debug_dump(struct mts_desc* desc) {
216 MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n",
217 (int)desc,
218 (int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0]
219 );
220 MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n",
221 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
222 usb_rcvbulkpipe(desc->usb_dev,desc->ep_response),
223 usb_rcvbulkpipe(desc->usb_dev,desc->ep_image)
224 );
225}
226
227
0eebe6ac 228static inline void mts_show_command(struct scsi_cmnd *srb)
1da177e4
LT		 229{
230 char *what = NULL;
231
232 switch (srb->cmnd[0]) {
233 case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
234 case REZERO_UNIT: what = "REZERO_UNIT"; break;
235 case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
236 case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
237 case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
238 case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
239 case READ_6: what = "READ_6"; break;
240 case WRITE_6: what = "WRITE_6"; break;
241 case SEEK_6: what = "SEEK_6"; break;
242 case READ_REVERSE: what = "READ_REVERSE"; break;
243 case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
244 case SPACE: what = "SPACE"; break;
245 case INQUIRY: what = "INQUIRY"; break;
246 case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
247 case MODE_SELECT: what = "MODE_SELECT"; break;
248 case RESERVE: what = "RESERVE"; break;
249 case RELEASE: what = "RELEASE"; break;
250 case COPY: what = "COPY"; break;
251 case ERASE: what = "ERASE"; break;
252 case MODE_SENSE: what = "MODE_SENSE"; break;
253 case START_STOP: what = "START_STOP"; break;
254 case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
255 case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
256 case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
257 case SET_WINDOW: what = "SET_WINDOW"; break;
258 case READ_CAPACITY: what = "READ_CAPACITY"; break;
259 case READ_10: what = "READ_10"; break;
260 case WRITE_10: what = "WRITE_10"; break;
261 case SEEK_10: what = "SEEK_10"; break;
262 case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
263 case VERIFY: what = "VERIFY"; break;
264 case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
265 case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
266 case SEARCH_LOW: what = "SEARCH_LOW"; break;
267 case SET_LIMITS: what = "SET_LIMITS"; break;
268 case READ_POSITION: what = "READ_POSITION"; break;
269 case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
270 case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
271 case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
272 case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
273 case COMPARE: what = "COMPARE"; break;
274 case COPY_VERIFY: what = "COPY_VERIFY"; break;
275 case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
276 case READ_BUFFER: what = "READ_BUFFER"; break;
277 case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
278 case READ_LONG: what = "READ_LONG"; break;
279 case WRITE_LONG: what = "WRITE_LONG"; break;
280 case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
281 case WRITE_SAME: what = "WRITE_SAME"; break;
282 case READ_TOC: what = "READ_TOC"; break;
283 case LOG_SELECT: what = "LOG_SELECT"; break;
284 case LOG_SENSE: what = "LOG_SENSE"; break;
285 case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
286 case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
287 case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
288 case READ_12: what = "READ_12"; break;
289 case WRITE_12: what = "WRITE_12"; break;
290 case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
291 case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
292 case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
293 case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
294 case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
295 case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
296 case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
297 default:
298 MTS_DEBUG("can't decode command\n");
299 goto out;
300 break;
301 }
302 MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
303
304 out:
305 MTS_DEBUG( " %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
306 srb->cmnd[0], srb->cmnd[1], srb->cmnd[2], srb->cmnd[3], srb->cmnd[4], srb->cmnd[5],
307 srb->cmnd[6], srb->cmnd[7], srb->cmnd[8], srb->cmnd[9]);
308}
309
310#else
311
0eebe6ac 312static inline void mts_show_command(struct scsi_cmnd * dummy)
1da177e4
LT		 313{
314}
315
316static inline void mts_debug_dump(struct mts_desc* dummy)
317{
318}
319
320#endif
321
322static inline void mts_urb_abort(struct mts_desc* desc) {
323 MTS_DEBUG_GOT_HERE();
324 mts_debug_dump(desc);
325
326 usb_kill_urb( desc->urb );
327}
328
9142d59a
ON		 329static int mts_slave_alloc (struct scsi_device *s)
330{
331 s->inquiry_len = 0x24;
332 return 0;
333}
334
335static int mts_slave_configure (struct scsi_device *s)
336{
337 blk_queue_dma_alignment(s->request_queue, (512 - 1));
338 return 0;
339}
340
0eebe6ac 341static int mts_scsi_abort(struct scsi_cmnd *srb)
1da177e4
LT		 342{
343 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
344
345 MTS_DEBUG_GOT_HERE();
346
347 mts_urb_abort(desc);
348
275cfdf4 349 return FAILED;
1da177e4
LT		 350}
351
0eebe6ac 352static int mts_scsi_host_reset(struct scsi_cmnd *srb)
1da177e4
LT		 353{
354 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
355 int result, rc;
356
357 MTS_DEBUG_GOT_HERE();
358 mts_debug_dump(desc);
359
360 rc = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
361 if (rc < 0)
362 return FAILED;
53b3531b 363 result = usb_reset_device(desc->usb_dev);
1da177e4
LT		 364 if (rc)
365 usb_unlock_device(desc->usb_dev);
366 return result ? FAILED : SUCCESS;
367}
368
0eebe6ac
HK		 369static int
370mts_scsi_queuecommand(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback);
1da177e4
LT		 371
372static void mts_transfer_cleanup( struct urb *transfer );
7d12e780 373static void mts_do_sg(struct urb * transfer);
1da177e4 374
77933d72 375static inline
1da177e4
LT		 376void mts_int_submit_urb (struct urb* transfer,
377 int pipe,
378 void* data,
379 unsigned length,
380 usb_complete_t callback )
381/* Interrupt context! */
382
383/* Holding transfer->context->lock! */
384{
385 int res;
386
387 MTS_INT_INIT();
388
389 usb_fill_bulk_urb(transfer,
390 context->instance->usb_dev,
391 pipe,
392 data,
393 length,
394 callback,
395 context
396 );
397
398 transfer->status = 0;
399
400 res = usb_submit_urb( transfer, GFP_ATOMIC );
401 if ( unlikely(res) ) {
402 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
403 context->srb->result = DID_ERROR << 16;
404 mts_transfer_cleanup(transfer);
405 }
406 return;
407}
408
409
410static void mts_transfer_cleanup( struct urb *transfer )
411/* Interrupt context! */
412{
413 MTS_INT_INIT();
414
415 if ( likely(context->final_callback != NULL) )
416 context->final_callback(context->srb);
417
418}
419
7d12e780 420static void mts_transfer_done( struct urb *transfer )
1da177e4
LT		 421{
422 MTS_INT_INIT();
423
424 context->srb->result &= MTS_SCSI_ERR_MASK;
9142d59a 425 context->srb->result |= (unsigned)(*context->scsi_status)<<1;
1da177e4
LT		 426
427 mts_transfer_cleanup(transfer);
428
429 return;
430}
431
432
433static void mts_get_status( struct urb *transfer )
434/* Interrupt context! */
435{
436 MTS_INT_INIT();
437
438 mts_int_submit_urb(transfer,
439 usb_rcvbulkpipe(context->instance->usb_dev,
440 context->instance->ep_response),
9142d59a 441 context->scsi_status,
1da177e4
LT		 442 1,
443 mts_transfer_done );
444}
445
7d12e780 446static void mts_data_done( struct urb* transfer )
1da177e4
LT		 447/* Interrupt context! */
448{
449 MTS_INT_INIT();
450
451 if ( context->data_length != transfer->actual_length ) {
452 context->srb->resid = context->data_length - transfer->actual_length;
453 } else if ( unlikely(transfer->status) ) {
454 context->srb->result = (transfer->status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
455 }
456
457 mts_get_status(transfer);
458
459 return;
460}
461
462
7d12e780 463static void mts_command_done( struct urb *transfer )
1da177e4
LT		 464/* Interrupt context! */
465{
466 MTS_INT_INIT();
467
468 if ( unlikely(transfer->status) ) {
469 if (transfer->status == -ENOENT) {
470 /* We are being killed */
471 MTS_DEBUG_GOT_HERE();
472 context->srb->result = DID_ABORT<<16;
473 } else {
474 /* A genuine error has occurred */
475 MTS_DEBUG_GOT_HERE();
476
477 context->srb->result = DID_ERROR<<16;
478 }
479 mts_transfer_cleanup(transfer);
480
481 return;
482 }
483
484 if (context->srb->cmnd[0] == REQUEST_SENSE) {
485 mts_int_submit_urb(transfer,
486 context->data_pipe,
487 context->srb->sense_buffer,
488 context->data_length,
489 mts_data_done);
490 } else { if ( context->data ) {
491 mts_int_submit_urb(transfer,
492 context->data_pipe,
493 context->data,
494 context->data_length,
9142d59a 495 context->srb->use_sg > 1 ? mts_do_sg : mts_data_done);
1da177e4
LT		 496 } else {
497 mts_get_status(transfer);
498 }
499 }
500
501 return;
502}
503
7d12e780 504static void mts_do_sg (struct urb* transfer)
1da177e4
LT		 505{
506 struct scatterlist * sg;
507 MTS_INT_INIT();
508
509 MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,context->srb->use_sg);
510
511 if (unlikely(transfer->status)) {
512 context->srb->result = (transfer->status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
513 mts_transfer_cleanup(transfer);
514 }
515
5d5ff44f 516 sg = context->srb->request_buffer;
1da177e4
LT		 517 context->fragment++;
518 mts_int_submit_urb(transfer,
519 context->data_pipe,
520 page_address(sg[context->fragment].page) +
521 sg[context->fragment].offset,
522 sg[context->fragment].length,
523 context->fragment + 1 == context->srb->use_sg ? mts_data_done : mts_do_sg);
524 return;
525}
526
527static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
528static const u8 mts_read_image_sig_len = 4;
529static const unsigned char mts_direction[256/8] = {
530 0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
531 0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
532 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
533 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
534};
535
536
537#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
538
539static void
0eebe6ac 540mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
1da177e4
LT		 541{
542 int pipe;
543 struct scatterlist * sg;
544
545 MTS_DEBUG_GOT_HERE();
546
547 desc->context.instance = desc;
548 desc->context.srb = srb;
549 desc->context.fragment = 0;
550
551 if (!srb->use_sg) {
5d5ff44f 552 if ( !srb->request_bufflen ){
1da177e4
LT		 553 desc->context.data = NULL;
554 desc->context.data_length = 0;
555 return;
556 } else {
5d5ff44f
CH		 557 desc->context.data = srb->request_buffer;
558 desc->context.data_length = srb->request_bufflen;
1da177e4
LT		 559 MTS_DEBUG("length = %d or %d\n",
560 srb->request_bufflen, srb->bufflen);
561 }
562 } else {
563 MTS_DEBUG("Using scatter/gather\n");
5d5ff44f 564 sg = srb->request_buffer;
1da177e4
LT		 565 desc->context.data = page_address(sg[0].page) + sg[0].offset;
566 desc->context.data_length = sg[0].length;
567 }
568
569
570 /* can't rely on srb->sc_data_direction */
571
572 /* Brutally ripped from usb-storage */
573
574 if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
575) { pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
576 MTS_DEBUG( "transfering from desc->ep_image == %d\n",
577 (int)desc->ep_image );
578 } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
579 pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
580 MTS_DEBUG( "transfering from desc->ep_response == %d\n",
581 (int)desc->ep_response);
582 } else {
583 MTS_DEBUG("transfering to desc->ep_out == %d\n",
584 (int)desc->ep_out);
585 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
586 }
587 desc->context.data_pipe = pipe;
588}
589
590
0eebe6ac
HK		 591static int
592mts_scsi_queuecommand(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
1da177e4
LT		 593{
594 struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
595 int err = 0;
596 int res;
597
598 MTS_DEBUG_GOT_HERE();
599 mts_show_command(srb);
600 mts_debug_dump(desc);
601
602 if ( srb->device->lun || srb->device->id || srb->device->channel ) {
603
604 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 );
605
606 MTS_DEBUG("this device doesn't exist\n");
607
608 srb->result = DID_BAD_TARGET << 16;
609
610 if(likely(callback != NULL))
611 callback(srb);
612
613 goto out;
614 }
615
616
617 usb_fill_bulk_urb(desc->urb,
618 desc->usb_dev,
619 usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
620 srb->cmnd,
621 srb->cmd_len,
622 mts_command_done,
623 &desc->context
624 );
625
626
627 mts_build_transfer_context( srb, desc );
628 desc->context.final_callback = callback;
629
630 /* here we need ATOMIC as we are called with the iolock */
631 res=usb_submit_urb(desc->urb, GFP_ATOMIC);
632
633 if(unlikely(res)){
634 MTS_ERROR("error %d submitting URB\n",(int)res);
635 srb->result = DID_ERROR << 16;
636
637 if(likely(callback != NULL))
638 callback(srb);
639
640 }
1da177e4
LT		 641out:
642 return err;
643}
644
d0be4a7d 645static struct scsi_host_template mts_scsi_host_template = {
1da177e4
LT		 646 .module = THIS_MODULE,
647 .name = "microtekX6",
648 .proc_name = "microtekX6",
649 .queuecommand = mts_scsi_queuecommand,
650 .eh_abort_handler = mts_scsi_abort,
651 .eh_host_reset_handler = mts_scsi_host_reset,
652 .sg_tablesize = SG_ALL,
653 .can_queue = 1,
654 .this_id = -1,
655 .cmd_per_lun = 1,
656 .use_clustering = 1,
657 .emulated = 1,
9142d59a
ON		 658 .slave_alloc = mts_slave_alloc,
659 .slave_configure = mts_slave_configure,
660 .max_sectors= 256, /* 128 K */
1da177e4
LT		 661};
662
663struct vendor_product
664{
665 char* name;
666 enum
667 {
668 mts_sup_unknown=0,
669 mts_sup_alpha,
670 mts_sup_full
671 }
672 support_status;
673} ;
674
675
676/* These are taken from the msmUSB.inf file on the Windows driver CD */
3c6bee1d 677static const struct vendor_product mts_supported_products[] =
1da177e4
LT		 678{
679 { "Phantom 336CX", mts_sup_unknown},
680 { "Phantom 336CX", mts_sup_unknown},
681 { "Scanmaker X6", mts_sup_alpha},
682 { "Phantom C6", mts_sup_unknown},
683 { "Phantom 336CX", mts_sup_unknown},
684 { "ScanMaker V6USL", mts_sup_unknown},
685 { "ScanMaker V6USL", mts_sup_unknown},
686 { "Scanmaker V6UL", mts_sup_unknown},
687 { "Scanmaker V6UPL", mts_sup_alpha},
688};
689
690/* The entries of microtek_table must correspond, line-by-line to
691 the entries of mts_supported_products[]. */
692
693static struct usb_device_id mts_usb_ids [] =
694{
695 { USB_DEVICE(0x4ce, 0x0300) },
696 { USB_DEVICE(0x5da, 0x0094) },
697 { USB_DEVICE(0x5da, 0x0099) },
698 { USB_DEVICE(0x5da, 0x009a) },
699 { USB_DEVICE(0x5da, 0x00a0) },
700 { USB_DEVICE(0x5da, 0x00a3) },
701 { USB_DEVICE(0x5da, 0x80a3) },
702 { USB_DEVICE(0x5da, 0x80ac) },
703 { USB_DEVICE(0x5da, 0x00b6) },
704 { } /* Terminating entry */
705};
706
707MODULE_DEVICE_TABLE (usb, mts_usb_ids);
708
709
710static int mts_usb_probe(struct usb_interface *intf,
711 const struct usb_device_id *id)
712{
713 int i;
714 int ep_out = -1;
715 int ep_in_set[3]; /* this will break if we have more than three endpoints
716 which is why we check */
717 int *ep_in_current = ep_in_set;
718 int err_retval = -ENOMEM;
719
720 struct mts_desc * new_desc;
721 struct vendor_product const* p;
722 struct usb_device *dev = interface_to_usbdev (intf);
723
724 /* the current altsetting on the interface we're probing */
725 struct usb_host_interface *altsetting;
726
727 MTS_DEBUG_GOT_HERE();
728 MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
729
730 MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
731 le16_to_cpu(dev->descriptor.idProduct),
732 le16_to_cpu(dev->descriptor.idVendor) );
733
734 MTS_DEBUG_GOT_HERE();
735
736 p = &mts_supported_products[id - mts_usb_ids];
737
738 MTS_DEBUG_GOT_HERE();
739
740 MTS_DEBUG( "found model %s\n", p->name );
741 if ( p->support_status != mts_sup_full )
742 MTS_MESSAGE( "model %s is not known to be fully supported, reports welcome!\n",
743 p->name );
744
745 /* the current altsetting on the interface we're probing */
746 altsetting = intf->cur_altsetting;
747
748
749 /* Check if the config is sane */
750
751 if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
752 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
753 (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
754 return -ENODEV;
755 }
756
757 for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
758 if ((altsetting->endpoint[i].desc.bmAttributes &
759 USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
760
761 MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
762 (int)altsetting->endpoint[i].desc.bEndpointAddress );
763 } else {
764 if (altsetting->endpoint[i].desc.bEndpointAddress &
765 USB_DIR_IN)
766 *ep_in_current++
767 = altsetting->endpoint[i].desc.bEndpointAddress &
768 USB_ENDPOINT_NUMBER_MASK;
769 else {
770 if ( ep_out != -1 ) {
771 MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
772 return -ENODEV;
773 }
774
775 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
776 USB_ENDPOINT_NUMBER_MASK;
777 }
778 }
779
780 }
781
782
783 if ( ep_out == -1 ) {
784 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
785 return -ENODEV;
786 }
9142d59a
ON		 787
788
61eded6e 789 new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
1da177e4
LT		 790 if (!new_desc)
791 goto out;
792
1da177e4
LT		 793 new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
794 if (!new_desc->urb)
795 goto out_kfree;
796
9142d59a
ON		 797 new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
798 if (!new_desc->context.scsi_status)
a3b1f50c 799 goto out_free_urb;
9142d59a 800
1da177e4
LT		 801 new_desc->usb_dev = dev;
802 new_desc->usb_intf = intf;
803 init_MUTEX(&new_desc->lock);
804
805 /* endpoints */
806 new_desc->ep_out = ep_out;
807 new_desc->ep_response = ep_in_set[0];
808 new_desc->ep_image = ep_in_set[1];
809
810 if ( new_desc->ep_out != MTS_EP_OUT )
811 MTS_WARNING( "will this work? Command EP is not usually %d\n",
812 (int)new_desc->ep_out );
813
814 if ( new_desc->ep_response != MTS_EP_RESPONSE )
815 MTS_WARNING( "will this work? Response EP is not usually %d\n",
816 (int)new_desc->ep_response );
817
818 if ( new_desc->ep_image != MTS_EP_IMAGE )
819 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
820 (int)new_desc->ep_image );
821
822 new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
823 sizeof(new_desc));
824 if (!new_desc->host)
a3b1f50c 825 goto out_kfree2;
1da177e4
LT		 826
827 new_desc->host->hostdata[0] = (unsigned long)new_desc;
828 if (scsi_add_host(new_desc->host, NULL)) {
829 err_retval = -EIO;
a3b1f50c 830 goto out_host_put;
1da177e4
LT		 831 }
832 scsi_scan_host(new_desc->host);
833
834 usb_set_intfdata(intf, new_desc);
835 return 0;
836
a3b1f50c
MK		 837 out_host_put:
838 scsi_host_put(new_desc->host);
9142d59a
ON		 839 out_kfree2:
840 kfree(new_desc->context.scsi_status);
1da177e4
LT		 841 out_free_urb:
842 usb_free_urb(new_desc->urb);
843 out_kfree:
844 kfree(new_desc);
845 out:
846 return err_retval;
847}
848
849static void mts_usb_disconnect (struct usb_interface *intf)
850{
851 struct mts_desc *desc = usb_get_intfdata(intf);
852
853 usb_set_intfdata(intf, NULL);
854
855 usb_kill_urb(desc->urb);
856 scsi_remove_host(desc->host);
857
858 scsi_host_put(desc->host);
859 usb_free_urb(desc->urb);
9142d59a 860 kfree(desc->context.scsi_status);
1da177e4
LT		 861 kfree(desc);
862}
863
864
865static int __init microtek_drv_init(void)
866{
867 return usb_register(&mts_usb_driver);
868}
869
870static void __exit microtek_drv_exit(void)
871{
872 usb_deregister(&mts_usb_driver);
873}
874
875module_init(microtek_drv_init);
876module_exit(microtek_drv_exit);
877
878MODULE_AUTHOR( DRIVER_AUTHOR );
879MODULE_DESCRIPTION( DRIVER_DESC );
880MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)