Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

Linux/drivers/usb/image/microtek.c

  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 
153 static int mts_usb_probe(struct usb_interface *intf,
154                          const struct usb_device_id *id);
155 static void mts_usb_disconnect(struct usb_interface *intf);
156 
157 static const struct usb_device_id mts_usb_ids[];
158 
159 static 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 
212 static 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 
225 static 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( "  %10ph\n", srb->cmnd);
303 }
304 
305 #else
306 
307 static inline void mts_show_command(struct scsi_cmnd * dummy)
308 {
309 }
310 
311 static inline void mts_debug_dump(struct mts_desc* dummy)
312 {
313 }
314 
315 #endif
316 
317 static inline void mts_urb_abort(struct mts_desc* desc) {
318         MTS_DEBUG_GOT_HERE();
319         mts_debug_dump(desc);
320 
321         usb_kill_urb( desc->urb );
322 }
323 
324 static int mts_slave_alloc (struct scsi_device *s)
325 {
326         s->inquiry_len = 0x24;
327         return 0;
328 }
329 
330 static int mts_slave_configure (struct scsi_device *s)
331 {
332         blk_queue_dma_alignment(s->request_queue, (512 - 1));
333         return 0;
334 }
335 
336 static int mts_scsi_abort(struct scsi_cmnd *srb)
337 {
338         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
339 
340         MTS_DEBUG_GOT_HERE();
341 
342         mts_urb_abort(desc);
343 
344         return FAILED;
345 }
346 
347 static int mts_scsi_host_reset(struct scsi_cmnd *srb)
348 {
349         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
350         int result;
351 
352         MTS_DEBUG_GOT_HERE();
353         mts_debug_dump(desc);
354 
355         result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
356         if (result == 0) {
357                 result = usb_reset_device(desc->usb_dev);
358                 usb_unlock_device(desc->usb_dev);
359         }
360         return result ? FAILED : SUCCESS;
361 }
362 
363 static int
364 mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
365 
366 static void mts_transfer_cleanup( struct urb *transfer );
367 static void mts_do_sg(struct urb * transfer);
368 
369 static inline
370 void mts_int_submit_urb (struct urb* transfer,
371                         int pipe,
372                         void* data,
373                         unsigned length,
374                         usb_complete_t callback )
375 /* Interrupt context! */
376 
377 /* Holding transfer->context->lock! */
378 {
379         int res;
380 
381         MTS_INT_INIT();
382 
383         usb_fill_bulk_urb(transfer,
384                       context->instance->usb_dev,
385                       pipe,
386                       data,
387                       length,
388                       callback,
389                       context
390                 );
391 
392         res = usb_submit_urb( transfer, GFP_ATOMIC );
393         if ( unlikely(res) ) {
394                 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
395                 context->srb->result = DID_ERROR << 16;
396                 mts_transfer_cleanup(transfer);
397         }
398 }
399 
400 
401 static void mts_transfer_cleanup( struct urb *transfer )
402 /* Interrupt context! */
403 {
404         MTS_INT_INIT();
405 
406         if ( likely(context->final_callback != NULL) )
407                 context->final_callback(context->srb);
408 }
409 
410 static void mts_transfer_done( struct urb *transfer )
411 {
412         MTS_INT_INIT();
413 
414         context->srb->result &= MTS_SCSI_ERR_MASK;
415         context->srb->result |= (unsigned)(*context->scsi_status)<<1;
416 
417         mts_transfer_cleanup(transfer);
418 }
419 
420 
421 static void mts_get_status( struct urb *transfer )
422 /* Interrupt context! */
423 {
424         MTS_INT_INIT();
425 
426         mts_int_submit_urb(transfer,
427                            usb_rcvbulkpipe(context->instance->usb_dev,
428                                            context->instance->ep_response),
429                            context->scsi_status,
430                            1,
431                            mts_transfer_done );
432 }
433 
434 static void mts_data_done( struct urb* transfer )
435 /* Interrupt context! */
436 {
437         int status = transfer->status;
438         MTS_INT_INIT();
439 
440         if ( context->data_length != transfer->actual_length ) {
441                 scsi_set_resid(context->srb, context->data_length -
442                                transfer->actual_length);
443         } else if ( unlikely(status) ) {
444                 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
445         }
446 
447         mts_get_status(transfer);
448 }
449 
450 
451 static void mts_command_done( struct urb *transfer )
452 /* Interrupt context! */
453 {
454         int status = transfer->status;
455         MTS_INT_INIT();
456 
457         if ( unlikely(status) ) {
458                 if (status == -ENOENT) {
459                         /* We are being killed */
460                         MTS_DEBUG_GOT_HERE();
461                         context->srb->result = DID_ABORT<<16;
462                 } else {
463                         /* A genuine error has occurred */
464                         MTS_DEBUG_GOT_HERE();
465 
466                         context->srb->result = DID_ERROR<<16;
467                 }
468                 mts_transfer_cleanup(transfer);
469 
470                 return;
471         }
472 
473         if (context->srb->cmnd[0] == REQUEST_SENSE) {
474                 mts_int_submit_urb(transfer,
475                                    context->data_pipe,
476                                    context->srb->sense_buffer,
477                                    context->data_length,
478                                    mts_data_done);
479         } else { if ( context->data ) {
480                         mts_int_submit_urb(transfer,
481                                            context->data_pipe,
482                                            context->data,
483                                            context->data_length,
484                                            scsi_sg_count(context->srb) > 1 ?
485                                                    mts_do_sg : mts_data_done);
486                 } else {
487                         mts_get_status(transfer);
488                 }
489         }
490 }
491 
492 static void mts_do_sg (struct urb* transfer)
493 {
494         struct scatterlist * sg;
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                 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
503                 mts_transfer_cleanup(transfer);
504         }
505 
506         sg = scsi_sglist(context->srb);
507         context->fragment++;
508         mts_int_submit_urb(transfer,
509                            context->data_pipe,
510                            sg_virt(&sg[context->fragment]),
511                            sg[context->fragment].length,
512                            context->fragment + 1 == scsi_sg_count(context->srb) ?
513                            mts_data_done : mts_do_sg);
514 }
515 
516 static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
517 static const u8 mts_read_image_sig_len = 4;
518 static const unsigned char mts_direction[256/8] = {
519         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
520         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
521         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
522         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
523 };
524 
525 
526 #define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
527 
528 static void
529 mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
530 {
531         int pipe;
532         struct scatterlist * sg;
533         
534         MTS_DEBUG_GOT_HERE();
535 
536         desc->context.instance = desc;
537         desc->context.srb = srb;
538         desc->context.fragment = 0;
539 
540         if (!scsi_bufflen(srb)) {
541                 desc->context.data = NULL;
542                 desc->context.data_length = 0;
543                 return;
544         } else {
545                 sg = scsi_sglist(srb);
546                 desc->context.data = sg_virt(&sg[0]);
547                 desc->context.data_length = sg[0].length;
548         }
549 
550 
551         /* can't rely on srb->sc_data_direction */
552 
553         /* Brutally ripped from usb-storage */
554 
555         if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
556 ) {             pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
557                 MTS_DEBUG( "transferring from desc->ep_image == %d\n",
558                            (int)desc->ep_image );
559         } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
560                         pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
561                         MTS_DEBUG( "transferring from desc->ep_response == %d\n",
562                                    (int)desc->ep_response);
563         } else {
564                 MTS_DEBUG("transferring to desc->ep_out == %d\n",
565                           (int)desc->ep_out);
566                 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
567         }
568         desc->context.data_pipe = pipe;
569 }
570 
571 
572 static int
573 mts_scsi_queuecommand_lck(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
574 {
575         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
576         int err = 0;
577         int res;
578 
579         MTS_DEBUG_GOT_HERE();
580         mts_show_command(srb);
581         mts_debug_dump(desc);
582 
583         if ( srb->device->lun || srb->device->id || srb->device->channel ) {
584 
585                 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 );
586 
587                 MTS_DEBUG("this device doesn't exist\n");
588 
589                 srb->result = DID_BAD_TARGET << 16;
590 
591                 if(likely(callback != NULL))
592                         callback(srb);
593 
594                 goto out;
595         }
596 
597         
598         usb_fill_bulk_urb(desc->urb,
599                       desc->usb_dev,
600                       usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
601                       srb->cmnd,
602                       srb->cmd_len,
603                       mts_command_done,
604                       &desc->context
605                       );
606 
607 
608         mts_build_transfer_context( srb, desc );
609         desc->context.final_callback = callback;
610         
611         /* here we need ATOMIC as we are called with the iolock */
612         res=usb_submit_urb(desc->urb, GFP_ATOMIC);
613 
614         if(unlikely(res)){
615                 MTS_ERROR("error %d submitting URB\n",(int)res);
616                 srb->result = DID_ERROR << 16;
617 
618                 if(likely(callback != NULL))
619                         callback(srb);
620 
621         }
622 out:
623         return err;
624 }
625 
626 static DEF_SCSI_QCMD(mts_scsi_queuecommand)
627 
628 static struct scsi_host_template mts_scsi_host_template = {
629         .module                 = THIS_MODULE,
630         .name                   = "microtekX6",
631         .proc_name              = "microtekX6",
632         .queuecommand           = mts_scsi_queuecommand,
633         .eh_abort_handler       = mts_scsi_abort,
634         .eh_host_reset_handler  = mts_scsi_host_reset,
635         .sg_tablesize =         SG_ALL,
636         .can_queue =            1,
637         .this_id =              -1,
638         .use_clustering =       1,
639         .emulated =             1,
640         .slave_alloc =          mts_slave_alloc,
641         .slave_configure =      mts_slave_configure,
642         .max_sectors=           256, /* 128 K */
643 };
644 
645 /* The entries of microtek_table must correspond, line-by-line to
646    the entries of mts_supported_products[]. */
647 
648 static const struct usb_device_id mts_usb_ids[] =
649 {
650         { USB_DEVICE(0x4ce, 0x0300) },
651         { USB_DEVICE(0x5da, 0x0094) },
652         { USB_DEVICE(0x5da, 0x0099) },
653         { USB_DEVICE(0x5da, 0x009a) },
654         { USB_DEVICE(0x5da, 0x00a0) },
655         { USB_DEVICE(0x5da, 0x00a3) },
656         { USB_DEVICE(0x5da, 0x80a3) },
657         { USB_DEVICE(0x5da, 0x80ac) },
658         { USB_DEVICE(0x5da, 0x00b6) },
659         { }                                             /* Terminating entry */
660 };
661 
662 MODULE_DEVICE_TABLE (usb, mts_usb_ids);
663 
664 
665 static int mts_usb_probe(struct usb_interface *intf,
666                          const struct usb_device_id *id)
667 {
668         int i;
669         int ep_out = -1;
670         int ep_in_set[3]; /* this will break if we have more than three endpoints
671                            which is why we check */
672         int *ep_in_current = ep_in_set;
673         int err_retval = -ENOMEM;
674 
675         struct mts_desc * new_desc;
676         struct usb_device *dev = interface_to_usbdev (intf);
677 
678         /* the current altsetting on the interface we're probing */
679         struct usb_host_interface *altsetting;
680 
681         MTS_DEBUG_GOT_HERE();
682         MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
683 
684         MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
685                    le16_to_cpu(dev->descriptor.idProduct),
686                    le16_to_cpu(dev->descriptor.idVendor) );
687 
688         MTS_DEBUG_GOT_HERE();
689 
690         /* the current altsetting on the interface we're probing */
691         altsetting = intf->cur_altsetting;
692 
693 
694         /* Check if the config is sane */
695 
696         if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
697                 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
698                              (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
699                 return -ENODEV;
700         }
701 
702         for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
703                 if ((altsetting->endpoint[i].desc.bmAttributes &
704                      USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
705 
706                         MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
707                              (int)altsetting->endpoint[i].desc.bEndpointAddress );
708                 } else {
709                         if (altsetting->endpoint[i].desc.bEndpointAddress &
710                             USB_DIR_IN)
711                                 *ep_in_current++
712                                         = altsetting->endpoint[i].desc.bEndpointAddress &
713                                         USB_ENDPOINT_NUMBER_MASK;
714                         else {
715                                 if ( ep_out != -1 ) {
716                                         MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
717                                         return -ENODEV;
718                                 }
719 
720                                 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
721                                         USB_ENDPOINT_NUMBER_MASK;
722                         }
723                 }
724 
725         }
726 
727 
728         if ( ep_out == -1 ) {
729                 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
730                 return -ENODEV;
731         }
732 
733 
734         new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
735         if (!new_desc)
736                 goto out;
737 
738         new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
739         if (!new_desc->urb)
740                 goto out_kfree;
741 
742         new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
743         if (!new_desc->context.scsi_status)
744                 goto out_free_urb;
745 
746         new_desc->usb_dev = dev;
747         new_desc->usb_intf = intf;
748 
749         /* endpoints */
750         new_desc->ep_out = ep_out;
751         new_desc->ep_response = ep_in_set[0];
752         new_desc->ep_image = ep_in_set[1];
753 
754         if ( new_desc->ep_out != MTS_EP_OUT )
755                 MTS_WARNING( "will this work? Command EP is not usually %d\n",
756                              (int)new_desc->ep_out );
757 
758         if ( new_desc->ep_response != MTS_EP_RESPONSE )
759                 MTS_WARNING( "will this work? Response EP is not usually %d\n",
760                              (int)new_desc->ep_response );
761 
762         if ( new_desc->ep_image != MTS_EP_IMAGE )
763                 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
764                              (int)new_desc->ep_image );
765 
766         new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
767                         sizeof(new_desc));
768         if (!new_desc->host)
769                 goto out_kfree2;
770 
771         new_desc->host->hostdata[0] = (unsigned long)new_desc;
772         if (scsi_add_host(new_desc->host, &dev->dev)) {
773                 err_retval = -EIO;
774                 goto out_host_put;
775         }
776         scsi_scan_host(new_desc->host);
777 
778         usb_set_intfdata(intf, new_desc);
779         return 0;
780 
781  out_host_put:
782         scsi_host_put(new_desc->host);
783  out_kfree2:
784         kfree(new_desc->context.scsi_status);
785  out_free_urb:
786         usb_free_urb(new_desc->urb);
787  out_kfree:
788         kfree(new_desc);
789  out:
790         return err_retval;
791 }
792 
793 static void mts_usb_disconnect (struct usb_interface *intf)
794 {
795         struct mts_desc *desc = usb_get_intfdata(intf);
796 
797         usb_set_intfdata(intf, NULL);
798 
799         usb_kill_urb(desc->urb);
800         scsi_remove_host(desc->host);
801 
802         scsi_host_put(desc->host);
803         usb_free_urb(desc->urb);
804         kfree(desc->context.scsi_status);
805         kfree(desc);
806 }
807 
808 module_usb_driver(mts_usb_driver);
809 
810 MODULE_AUTHOR( DRIVER_AUTHOR );
811 MODULE_DESCRIPTION( DRIVER_DESC );
812 MODULE_LICENSE("GPL");
813 

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