drivers/usb/image/microtek.c

   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
 134 #include <linux/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 #define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
 142 #define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
 143
 144 /* Should we do debugging? */
 145
 146 //#define MTS_DO_DEBUG
 147
 148 /* USB layer driver interface */
 149
 150 static int mts_usb_probe(struct usb_interface *intf,
 151                          const struct usb_device_id *id);
 152 static void mts_usb_disconnect(struct usb_interface *intf);
 153
 154 static const struct usb_device_id mts_usb_ids[];
 155
 156 static struct usb_driver mts_usb_driver = {
 157         .name =         "microtekX6",
 158         .probe =        mts_usb_probe,
 159         .disconnect =   mts_usb_disconnect,
 160         .id_table =     mts_usb_ids,
 161 };
 162
 163
 164 /* Internal driver stuff */
 165
 166 #define MTS_VERSION     "0.4.3"
 167 #define MTS_NAME        "microtek usb (rev " MTS_VERSION "): "
 168
 169 #define MTS_WARNING(x...) \
 170         printk( KERN_WARNING MTS_NAME x )
 171 #define MTS_ERROR(x...) \
 172         printk( KERN_ERR MTS_NAME x )
 173 #define MTS_INT_ERROR(x...) \
 174         MTS_ERROR(x)
 175 #define MTS_MESSAGE(x...) \
 176         printk( KERN_INFO MTS_NAME x )
 177
 178 #if defined MTS_DO_DEBUG
 179
 180 #define MTS_DEBUG(x...) \
 181         printk( KERN_DEBUG MTS_NAME x )
 182
 183 #define MTS_DEBUG_GOT_HERE() \
 184         MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ )
 185 #define MTS_DEBUG_INT() \
 186         do { MTS_DEBUG_GOT_HERE(); \
 187              MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
 188              MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
 189              mts_debug_dump(context->instance);\
 190            } while(0)
 191 #else
 192
 193 #define MTS_NUL_STATEMENT do { } while(0)
 194
 195 #define MTS_DEBUG(x...) MTS_NUL_STATEMENT
 196 #define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
 197 #define MTS_DEBUG_INT() MTS_NUL_STATEMENT
 198
 199 #endif
 200
 201
 202
 203 #define MTS_INT_INIT()\
 204         struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
 205         MTS_DEBUG_INT();\
 206
 207 #ifdef MTS_DO_DEBUG
 208
 209 static inline void mts_debug_dump(struct mts_desc* desc) {
 210         MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n",
 211                   (int)desc,
 212                   (int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0]
 213                 );
 214         MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n",
 215                   usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
 216                   usb_rcvbulkpipe(desc->usb_dev,desc->ep_response),
 217                   usb_rcvbulkpipe(desc->usb_dev,desc->ep_image)
 218                 );
 219 }
 220
 221
 222 static inline void mts_show_command(struct scsi_cmnd *srb)
 223 {
 224         char *what = NULL;
 225
 226         switch (srb->cmnd[0]) {
 227         case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
 228         case REZERO_UNIT: what = "REZERO_UNIT"; break;
 229         case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
 230         case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
 231         case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
 232         case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
 233         case READ_6: what = "READ_6"; break;
 234         case WRITE_6: what = "WRITE_6"; break;
 235         case SEEK_6: what = "SEEK_6"; break;
 236         case READ_REVERSE: what = "READ_REVERSE"; break;
 237         case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
 238         case SPACE: what = "SPACE"; break;
 239         case INQUIRY: what = "INQUIRY"; break;
 240         case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
 241         case MODE_SELECT: what = "MODE_SELECT"; break;
 242         case RESERVE: what = "RESERVE"; break;
 243         case RELEASE: what = "RELEASE"; break;
 244         case COPY: what = "COPY"; break;
 245         case ERASE: what = "ERASE"; break;
 246         case MODE_SENSE: what = "MODE_SENSE"; break;
 247         case START_STOP: what = "START_STOP"; break;
 248         case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
 249         case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
 250         case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
 251         case SET_WINDOW: what = "SET_WINDOW"; break;
 252         case READ_CAPACITY: what = "READ_CAPACITY"; break;
 253         case READ_10: what = "READ_10"; break;
 254         case WRITE_10: what = "WRITE_10"; break;
 255         case SEEK_10: what = "SEEK_10"; break;
 256         case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
 257         case VERIFY: what = "VERIFY"; break;
 258         case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
 259         case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
 260         case SEARCH_LOW: what = "SEARCH_LOW"; break;
 261         case SET_LIMITS: what = "SET_LIMITS"; break;
 262         case READ_POSITION: what = "READ_POSITION"; break;
 263         case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
 264         case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
 265         case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
 266         case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
 267         case COMPARE: what = "COMPARE"; break;
 268         case COPY_VERIFY: what = "COPY_VERIFY"; break;
 269         case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
 270         case READ_BUFFER: what = "READ_BUFFER"; break;
 271         case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
 272         case READ_LONG: what = "READ_LONG"; break;
 273         case WRITE_LONG: what = "WRITE_LONG"; break;
 274         case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
 275         case WRITE_SAME: what = "WRITE_SAME"; break;
 276         case READ_TOC: what = "READ_TOC"; break;
 277         case LOG_SELECT: what = "LOG_SELECT"; break;
 278         case LOG_SENSE: what = "LOG_SENSE"; break;
 279         case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
 280         case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
 281         case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
 282         case READ_12: what = "READ_12"; break;
 283         case WRITE_12: what = "WRITE_12"; break;
 284         case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
 285         case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
 286         case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
 287         case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
 288         case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
 289         case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
 290         case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
 291         default:
 292                 MTS_DEBUG("can't decode command\n");
 293                 goto out;
 294                 break;
 295         }
 296         MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
 297
 298  out:
 299         MTS_DEBUG( "  %10ph\n", srb->cmnd);
 300 }
 301
 302 #else
 303
 304 static inline void mts_show_command(struct scsi_cmnd * dummy)
 305 {
 306 }
 307
 308 static inline void mts_debug_dump(struct mts_desc* dummy)
 309 {
 310 }
 311
 312 #endif
 313
 314 static inline void mts_urb_abort(struct mts_desc* desc) {
 315         MTS_DEBUG_GOT_HERE();
 316         mts_debug_dump(desc);
 317
 318         usb_kill_urb( desc->urb );
 319 }
 320
 321 static int mts_slave_alloc (struct scsi_device *s)
 322 {
 323         s->inquiry_len = 0x24;
 324         return 0;
 325 }
 326
 327 static int mts_slave_configure (struct scsi_device *s)
 328 {
 329         blk_queue_dma_alignment(s->request_queue, (512 - 1));
 330         return 0;
 331 }
 332
 333 static int mts_scsi_abort(struct scsi_cmnd *srb)
 334 {
 335         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 336
 337         MTS_DEBUG_GOT_HERE();
 338
 339         mts_urb_abort(desc);
 340
 341         return FAILED;
 342 }
 343
 344 static int mts_scsi_host_reset(struct scsi_cmnd *srb)
 345 {
 346         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 347         int result;
 348
 349         MTS_DEBUG_GOT_HERE();
 350         mts_debug_dump(desc);
 351
 352         result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
 353         if (result == 0) {
 354                 result = usb_reset_device(desc->usb_dev);
 355                 usb_unlock_device(desc->usb_dev);
 356         }
 357         return result ? FAILED : SUCCESS;
 358 }
 359
 360 static int
 361 mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
 362
 363 static void mts_transfer_cleanup( struct urb *transfer );
 364 static void mts_do_sg(struct urb * transfer);
 365
 366 static inline
 367 void mts_int_submit_urb (struct urb* transfer,
 368                         int pipe,
 369                         void* data,
 370                         unsigned length,
 371                         usb_complete_t callback )
 372 /* Interrupt context! */
 373
 374 /* Holding transfer->context->lock! */
 375 {
 376         int res;
 377
 378         MTS_INT_INIT();
 379
 380         usb_fill_bulk_urb(transfer,
 381                       context->instance->usb_dev,
 382                       pipe,
 383                       data,
 384                       length,
 385                       callback,
 386                       context
 387                 );
 388
 389         res = usb_submit_urb( transfer, GFP_ATOMIC );
 390         if ( unlikely(res) ) {
 391                 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
 392                 context->srb->result = DID_ERROR << 16;
 393                 mts_transfer_cleanup(transfer);
 394         }
 395 }
 396
 397
 398 static void mts_transfer_cleanup( struct urb *transfer )
 399 /* Interrupt context! */
 400 {
 401         MTS_INT_INIT();
 402
 403         if ( likely(context->final_callback != NULL) )
 404                 context->final_callback(context->srb);
 405 }
 406
 407 static void mts_transfer_done( struct urb *transfer )
 408 {
 409         MTS_INT_INIT();
 410
 411         context->srb->result &= MTS_SCSI_ERR_MASK;
 412         context->srb->result |= (unsigned)(*context->scsi_status)<<1;
 413
 414         mts_transfer_cleanup(transfer);
 415 }
 416
 417
 418 static void mts_get_status( struct urb *transfer )
 419 /* Interrupt context! */
 420 {
 421         MTS_INT_INIT();
 422
 423         mts_int_submit_urb(transfer,
 424                            usb_rcvbulkpipe(context->instance->usb_dev,
 425                                            context->instance->ep_response),
 426                            context->scsi_status,
 427                            1,
 428                            mts_transfer_done );
 429 }
 430
 431 static void mts_data_done( struct urb* transfer )
 432 /* Interrupt context! */
 433 {
 434         int status = transfer->status;
 435         MTS_INT_INIT();
 436
 437         if ( context->data_length != transfer->actual_length ) {
 438                 scsi_set_resid(context->srb, context->data_length -
 439                                transfer->actual_length);
 440         } else if ( unlikely(status) ) {
 441                 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
 442         }
 443
 444         mts_get_status(transfer);
 445 }
 446
 447
 448 static void mts_command_done( struct urb *transfer )
 449 /* Interrupt context! */
 450 {
 451         int status = transfer->status;
 452         MTS_INT_INIT();
 453
 454         if ( unlikely(status) ) {
 455                 if (status == -ENOENT) {
 456                         /* We are being killed */
 457                         MTS_DEBUG_GOT_HERE();
 458                         context->srb->result = DID_ABORT<<16;
 459                 } else {
 460                         /* A genuine error has occurred */
 461                         MTS_DEBUG_GOT_HERE();
 462
 463                         context->srb->result = DID_ERROR<<16;
 464                 }
 465                 mts_transfer_cleanup(transfer);
 466
 467                 return;
 468         }
 469
 470         if (context->srb->cmnd[0] == REQUEST_SENSE) {
 471                 mts_int_submit_urb(transfer,
 472                                    context->data_pipe,
 473                                    context->srb->sense_buffer,
 474                                    context->data_length,
 475                                    mts_data_done);
 476         } else { if ( context->data ) {
 477                         mts_int_submit_urb(transfer,
 478                                            context->data_pipe,
 479                                            context->data,
 480                                            context->data_length,
 481                                            scsi_sg_count(context->srb) > 1 ?
 482                                                    mts_do_sg : mts_data_done);
 483                 } else {
 484                         mts_get_status(transfer);
 485                 }
 486         }
 487 }
 488
 489 static void mts_do_sg (struct urb* transfer)
 490 {
 491         int status = transfer->status;
 492         MTS_INT_INIT();
 493
 494         MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
 495                                                   scsi_sg_count(context->srb));
 496
 497         if (unlikely(status)) {
 498                 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
 499                 mts_transfer_cleanup(transfer);
 500         }
 501
 502         context->curr_sg = sg_next(context->curr_sg);
 503         mts_int_submit_urb(transfer,
 504                            context->data_pipe,
 505                            sg_virt(context->curr_sg),
 506                            context->curr_sg->length,
 507                            sg_is_last(context->curr_sg) ?
 508                            mts_data_done : mts_do_sg);
 509 }
 510
 511 static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
 512 static const u8 mts_read_image_sig_len = 4;
 513 static const unsigned char mts_direction[256/8] = {
 514         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
 515         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
 516         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
 517         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 518 };
 519
 520
 521 #define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
 522
 523 static void
 524 mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
 525 {
 526         int pipe;
 527
 528         MTS_DEBUG_GOT_HERE();
 529
 530         desc->context.instance = desc;
 531         desc->context.srb = srb;
 532
 533         if (!scsi_bufflen(srb)) {
 534                 desc->context.data = NULL;
 535                 desc->context.data_length = 0;
 536                 return;
 537         } else {
 538                 desc->context.curr_sg = scsi_sglist(srb);
 539                 desc->context.data = sg_virt(desc->context.curr_sg);
 540                 desc->context.data_length = desc->context.curr_sg->length;
 541         }
 542
 543
 544         /* can't rely on srb->sc_data_direction */
 545
 546         /* Brutally ripped from usb-storage */
 547
 548         if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
 549 ) {             pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
 550                 MTS_DEBUG( "transferring from desc->ep_image == %d\n",
 551                            (int)desc->ep_image );
 552         } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
 553                         pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
 554                         MTS_DEBUG( "transferring from desc->ep_response == %d\n",
 555                                    (int)desc->ep_response);
 556         } else {
 557                 MTS_DEBUG("transferring to desc->ep_out == %d\n",
 558                           (int)desc->ep_out);
 559                 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
 560         }
 561         desc->context.data_pipe = pipe;
 562 }
 563
 564
 565 static int
 566 mts_scsi_queuecommand_lck(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
 567 {
 568         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 569         int err = 0;
 570         int res;
 571
 572         MTS_DEBUG_GOT_HERE();
 573         mts_show_command(srb);
 574         mts_debug_dump(desc);
 575
 576         if ( srb->device->lun || srb->device->id || srb->device->channel ) {
 577
 578                 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 );
 579
 580                 MTS_DEBUG("this device doesn't exist\n");
 581
 582                 srb->result = DID_BAD_TARGET << 16;
 583
 584                 if(likely(callback != NULL))
 585                         callback(srb);
 586
 587                 goto out;
 588         }
 589
 590
 591         usb_fill_bulk_urb(desc->urb,
 592                       desc->usb_dev,
 593                       usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
 594                       srb->cmnd,
 595                       srb->cmd_len,
 596                       mts_command_done,
 597                       &desc->context
 598                       );
 599
 600
 601         mts_build_transfer_context( srb, desc );
 602         desc->context.final_callback = callback;
 603
 604         /* here we need ATOMIC as we are called with the iolock */
 605         res=usb_submit_urb(desc->urb, GFP_ATOMIC);
 606
 607         if(unlikely(res)){
 608                 MTS_ERROR("error %d submitting URB\n",(int)res);
 609                 srb->result = DID_ERROR << 16;
 610
 611                 if(likely(callback != NULL))
 612                         callback(srb);
 613
 614         }
 615 out:
 616         return err;
 617 }
 618
 619 static DEF_SCSI_QCMD(mts_scsi_queuecommand)
 620
 621 static struct scsi_host_template mts_scsi_host_template = {
 622         .module                 = THIS_MODULE,
 623         .name                   = "microtekX6",
 624         .proc_name              = "microtekX6",
 625         .queuecommand           = mts_scsi_queuecommand,
 626         .eh_abort_handler       = mts_scsi_abort,
 627         .eh_host_reset_handler  = mts_scsi_host_reset,
 628         .sg_tablesize =         SG_ALL,
 629         .can_queue =            1,
 630         .this_id =              -1,
 631         .emulated =             1,
 632         .slave_alloc =          mts_slave_alloc,
 633         .slave_configure =      mts_slave_configure,
 634         .max_sectors=           256, /* 128 K */
 635 };
 636
 637 /* The entries of microtek_table must correspond, line-by-line to
 638    the entries of mts_supported_products[]. */
 639
 640 static const struct usb_device_id mts_usb_ids[] =
 641 {
 642         { USB_DEVICE(0x4ce, 0x0300) },
 643         { USB_DEVICE(0x5da, 0x0094) },
 644         { USB_DEVICE(0x5da, 0x0099) },
 645         { USB_DEVICE(0x5da, 0x009a) },
 646         { USB_DEVICE(0x5da, 0x00a0) },
 647         { USB_DEVICE(0x5da, 0x00a3) },
 648         { USB_DEVICE(0x5da, 0x80a3) },
 649         { USB_DEVICE(0x5da, 0x80ac) },
 650         { USB_DEVICE(0x5da, 0x00b6) },
 651         { }                                             /* Terminating entry */
 652 };
 653
 654 MODULE_DEVICE_TABLE (usb, mts_usb_ids);
 655
 656
 657 static int mts_usb_probe(struct usb_interface *intf,
 658                          const struct usb_device_id *id)
 659 {
 660         int i;
 661         int ep_out = -1;
 662         int ep_in_set[3]; /* this will break if we have more than three endpoints
 663                            which is why we check */
 664         int *ep_in_current = ep_in_set;
 665         int err_retval = -ENOMEM;
 666
 667         struct mts_desc * new_desc;
 668         struct usb_device *dev = interface_to_usbdev (intf);
 669
 670         /* the current altsetting on the interface we're probing */
 671         struct usb_host_interface *altsetting;
 672
 673         MTS_DEBUG_GOT_HERE();
 674         MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
 675
 676         MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
 677                    le16_to_cpu(dev->descriptor.idProduct),
 678                    le16_to_cpu(dev->descriptor.idVendor) );
 679
 680         MTS_DEBUG_GOT_HERE();
 681
 682         /* the current altsetting on the interface we're probing */
 683         altsetting = intf->cur_altsetting;
 684
 685
 686         /* Check if the config is sane */
 687
 688         if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
 689                 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
 690                              (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
 691                 return -ENODEV;
 692         }
 693
 694         for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
 695                 if ((altsetting->endpoint[i].desc.bmAttributes &
 696                      USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
 697
 698                         MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
 699                              (int)altsetting->endpoint[i].desc.bEndpointAddress );
 700                 } else {
 701                         if (altsetting->endpoint[i].desc.bEndpointAddress &
 702                             USB_DIR_IN)
 703                                 *ep_in_current++
 704                                         = altsetting->endpoint[i].desc.bEndpointAddress &
 705                                         USB_ENDPOINT_NUMBER_MASK;
 706                         else {
 707                                 if ( ep_out != -1 ) {
 708                                         MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
 709                                         return -ENODEV;
 710                                 }
 711
 712                                 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
 713                                         USB_ENDPOINT_NUMBER_MASK;
 714                         }
 715                 }
 716
 717         }
 718
 719         if (ep_in_current != &ep_in_set[2]) {
 720                 MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n");
 721                 return -ENODEV;
 722         }
 723
 724         if ( ep_out == -1 ) {
 725                 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
 726                 return -ENODEV;
 727         }
 728
 729
 730         new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
 731         if (!new_desc)
 732                 goto out;
 733
 734         new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
 735         if (!new_desc->urb)
 736                 goto out_kfree;
 737
 738         new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
 739         if (!new_desc->context.scsi_status)
 740                 goto out_free_urb;
 741
 742         new_desc->usb_dev = dev;
 743         new_desc->usb_intf = intf;
 744
 745         /* endpoints */
 746         new_desc->ep_out = ep_out;
 747         new_desc->ep_response = ep_in_set[0];
 748         new_desc->ep_image = ep_in_set[1];
 749
 750         if ( new_desc->ep_out != MTS_EP_OUT )
 751                 MTS_WARNING( "will this work? Command EP is not usually %d\n",
 752                              (int)new_desc->ep_out );
 753
 754         if ( new_desc->ep_response != MTS_EP_RESPONSE )
 755                 MTS_WARNING( "will this work? Response EP is not usually %d\n",
 756                              (int)new_desc->ep_response );
 757
 758         if ( new_desc->ep_image != MTS_EP_IMAGE )
 759                 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
 760                              (int)new_desc->ep_image );
 761
 762         new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
 763                         sizeof(new_desc));
 764         if (!new_desc->host)
 765                 goto out_kfree2;
 766
 767         new_desc->host->hostdata[0] = (unsigned long)new_desc;
 768         if (scsi_add_host(new_desc->host, &dev->dev)) {
 769                 err_retval = -EIO;
 770                 goto out_host_put;
 771         }
 772         scsi_scan_host(new_desc->host);
 773
 774         usb_set_intfdata(intf, new_desc);
 775         return 0;
 776
 777  out_host_put:
 778         scsi_host_put(new_desc->host);
 779  out_kfree2:
 780         kfree(new_desc->context.scsi_status);
 781  out_free_urb:
 782         usb_free_urb(new_desc->urb);
 783  out_kfree:
 784         kfree(new_desc);
 785  out:
 786         return err_retval;
 787 }
 788
 789 static void mts_usb_disconnect (struct usb_interface *intf)
 790 {
 791         struct mts_desc *desc = usb_get_intfdata(intf);
 792
 793         usb_set_intfdata(intf, NULL);
 794
 795         usb_kill_urb(desc->urb);
 796         scsi_remove_host(desc->host);
 797
 798         scsi_host_put(desc->host);
 799         usb_free_urb(desc->urb);
 800         kfree(desc->context.scsi_status);
 801         kfree(desc);
 802 }
 803
 804 module_usb_driver(mts_usb_driver);
 805
 806 MODULE_AUTHOR( DRIVER_AUTHOR );
 807 MODULE_DESCRIPTION( DRIVER_DESC );
 808 MODULE_LICENSE("GPL");