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 #include <linux/atomic.h>
 134 #include <linux/blkdev.h>
 135
 136 #include <scsi/scsi.h>
 137 #include <scsi/scsi_cmnd.h>
 138 #include <scsi/scsi_device.h>
 139 #include <scsi/scsi_eh.h>
 140 #include <scsi/scsi_host.h>
 141 #include <scsi/scsi_tcq.h>
 142
 143 #include "microtek.h"
 144
 145 #define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
 146 #define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
 147
 148 /* Should we do debugging? */
 149
 150 //#define MTS_DO_DEBUG
 151
 152 /* USB layer driver interface */
 153
 154 static int mts_usb_probe(struct usb_interface *intf,
 155                          const struct usb_device_id *id);
 156 static void mts_usb_disconnect(struct usb_interface *intf);
 157
 158 static const struct usb_device_id mts_usb_ids[];
 159
 160 static struct usb_driver mts_usb_driver = {
 161         .name =         "microtekX6",
 162         .probe =        mts_usb_probe,
 163         .disconnect =   mts_usb_disconnect,
 164         .id_table =     mts_usb_ids,
 165 };
 166
 167
 168 /* Internal driver stuff */
 169
 170 #define MTS_VERSION     "0.4.3"
 171 #define MTS_NAME        "microtek usb (rev " MTS_VERSION "): "
 172
 173 #define MTS_WARNING(x...) \
 174         printk( KERN_WARNING MTS_NAME x )
 175 #define MTS_ERROR(x...) \
 176         printk( KERN_ERR MTS_NAME x )
 177 #define MTS_INT_ERROR(x...) \
 178         MTS_ERROR(x)
 179 #define MTS_MESSAGE(x...) \
 180         printk( KERN_INFO MTS_NAME x )
 181
 182 #if defined MTS_DO_DEBUG
 183
 184 #define MTS_DEBUG(x...) \
 185         printk( KERN_DEBUG MTS_NAME x )
 186
 187 #define MTS_DEBUG_GOT_HERE() \
 188         MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ )
 189 #define MTS_DEBUG_INT() \
 190         do { MTS_DEBUG_GOT_HERE(); \
 191              MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
 192              MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
 193              mts_debug_dump(context->instance);\
 194            } while(0)
 195 #else
 196
 197 #define MTS_NUL_STATEMENT do { } while(0)
 198
 199 #define MTS_DEBUG(x...) MTS_NUL_STATEMENT
 200 #define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
 201 #define MTS_DEBUG_INT() MTS_NUL_STATEMENT
 202
 203 #endif
 204
 205
 206
 207 #define MTS_INT_INIT()\
 208         struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
 209         MTS_DEBUG_INT();\
 210
 211 #ifdef MTS_DO_DEBUG
 212
 213 static 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
 226 static inline void mts_show_command(struct scsi_cmnd *srb)
 227 {
 228         char *what = NULL;
 229
 230         switch (srb->cmnd[0]) {
 231         case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
 232         case REZERO_UNIT: what = "REZERO_UNIT"; break;
 233         case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
 234         case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
 235         case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
 236         case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
 237         case READ_6: what = "READ_6"; break;
 238         case WRITE_6: what = "WRITE_6"; break;
 239         case SEEK_6: what = "SEEK_6"; break;
 240         case READ_REVERSE: what = "READ_REVERSE"; break;
 241         case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
 242         case SPACE: what = "SPACE"; break;
 243         case INQUIRY: what = "INQUIRY"; break;
 244         case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
 245         case MODE_SELECT: what = "MODE_SELECT"; break;
 246         case RESERVE: what = "RESERVE"; break;
 247         case RELEASE: what = "RELEASE"; break;
 248         case COPY: what = "COPY"; break;
 249         case ERASE: what = "ERASE"; break;
 250         case MODE_SENSE: what = "MODE_SENSE"; break;
 251         case START_STOP: what = "START_STOP"; break;
 252         case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
 253         case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
 254         case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
 255         case SET_WINDOW: what = "SET_WINDOW"; break;
 256         case READ_CAPACITY: what = "READ_CAPACITY"; break;
 257         case READ_10: what = "READ_10"; break;
 258         case WRITE_10: what = "WRITE_10"; break;
 259         case SEEK_10: what = "SEEK_10"; break;
 260         case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
 261         case VERIFY: what = "VERIFY"; break;
 262         case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
 263         case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
 264         case SEARCH_LOW: what = "SEARCH_LOW"; break;
 265         case SET_LIMITS: what = "SET_LIMITS"; break;
 266         case READ_POSITION: what = "READ_POSITION"; break;
 267         case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
 268         case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
 269         case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
 270         case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
 271         case COMPARE: what = "COMPARE"; break;
 272         case COPY_VERIFY: what = "COPY_VERIFY"; break;
 273         case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
 274         case READ_BUFFER: what = "READ_BUFFER"; break;
 275         case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
 276         case READ_LONG: what = "READ_LONG"; break;
 277         case WRITE_LONG: what = "WRITE_LONG"; break;
 278         case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
 279         case WRITE_SAME: what = "WRITE_SAME"; break;
 280         case READ_TOC: what = "READ_TOC"; break;
 281         case LOG_SELECT: what = "LOG_SELECT"; break;
 282         case LOG_SENSE: what = "LOG_SENSE"; break;
 283         case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
 284         case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
 285         case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
 286         case READ_12: what = "READ_12"; break;
 287         case WRITE_12: what = "WRITE_12"; break;
 288         case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
 289         case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
 290         case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
 291         case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
 292         case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
 293         case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
 294         case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
 295         default:
 296                 MTS_DEBUG("can't decode command\n");
 297                 goto out;
 298                 break;
 299         }
 300         MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
 301
 302  out:
 303         MTS_DEBUG( "  %10ph\n", srb->cmnd);
 304 }
 305
 306 #else
 307
 308 static inline void mts_show_command(struct scsi_cmnd * dummy)
 309 {
 310 }
 311
 312 static inline void mts_debug_dump(struct mts_desc* dummy)
 313 {
 314 }
 315
 316 #endif
 317
 318 static inline void mts_urb_abort(struct mts_desc* desc) {
 319         MTS_DEBUG_GOT_HERE();
 320         mts_debug_dump(desc);
 321
 322         usb_kill_urb( desc->urb );
 323 }
 324
 325 static int mts_slave_alloc (struct scsi_device *s)
 326 {
 327         s->inquiry_len = 0x24;
 328         return 0;
 329 }
 330
 331 static int mts_scsi_abort(struct scsi_cmnd *srb)
 332 {
 333         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 334
 335         MTS_DEBUG_GOT_HERE();
 336
 337         mts_urb_abort(desc);
 338
 339         return FAILED;
 340 }
 341
 342 static int mts_scsi_host_reset(struct scsi_cmnd *srb)
 343 {
 344         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 345         int result;
 346
 347         MTS_DEBUG_GOT_HERE();
 348         mts_debug_dump(desc);
 349
 350         result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
 351         if (result == 0) {
 352                 result = usb_reset_device(desc->usb_dev);
 353                 usb_unlock_device(desc->usb_dev);
 354         }
 355         return result ? FAILED : SUCCESS;
 356 }
 357
 358 static int
 359 mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
 360
 361 static void mts_transfer_cleanup( struct urb *transfer );
 362 static void mts_do_sg(struct urb * transfer);
 363
 364 static inline
 365 void mts_int_submit_urb (struct urb* transfer,
 366                         int pipe,
 367                         void* data,
 368                         unsigned length,
 369                         usb_complete_t callback )
 370 /* Interrupt context! */
 371
 372 /* Holding transfer->context->lock! */
 373 {
 374         int res;
 375
 376         MTS_INT_INIT();
 377
 378         usb_fill_bulk_urb(transfer,
 379                       context->instance->usb_dev,
 380                       pipe,
 381                       data,
 382                       length,
 383                       callback,
 384                       context
 385                 );
 386
 387         res = usb_submit_urb( transfer, GFP_ATOMIC );
 388         if ( unlikely(res) ) {
 389                 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
 390                 set_host_byte(context->srb, DID_ERROR);
 391                 mts_transfer_cleanup(transfer);
 392         }
 393 }
 394
 395
 396 static void mts_transfer_cleanup( struct urb *transfer )
 397 /* Interrupt context! */
 398 {
 399         MTS_INT_INIT();
 400
 401         if ( likely(context->final_callback != NULL) )
 402                 context->final_callback(context->srb);
 403 }
 404
 405 static void mts_transfer_done( struct urb *transfer )
 406 {
 407         MTS_INT_INIT();
 408
 409         context->srb->result &= MTS_SCSI_ERR_MASK;
 410         context->srb->result |= (unsigned)(*context->scsi_status)<<1;
 411
 412         mts_transfer_cleanup(transfer);
 413 }
 414
 415
 416 static void mts_get_status( struct urb *transfer )
 417 /* Interrupt context! */
 418 {
 419         MTS_INT_INIT();
 420
 421         mts_int_submit_urb(transfer,
 422                            usb_rcvbulkpipe(context->instance->usb_dev,
 423                                            context->instance->ep_response),
 424                            context->scsi_status,
 425                            1,
 426                            mts_transfer_done );
 427 }
 428
 429 static void mts_data_done( struct urb* transfer )
 430 /* Interrupt context! */
 431 {
 432         int status = transfer->status;
 433         MTS_INT_INIT();
 434
 435         if ( context->data_length != transfer->actual_length ) {
 436                 scsi_set_resid(context->srb, context->data_length -
 437                                transfer->actual_length);
 438         } else if ( unlikely(status) ) {
 439                 set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR));
 440         }
 441
 442         mts_get_status(transfer);
 443 }
 444
 445
 446 static void mts_command_done( struct urb *transfer )
 447 /* Interrupt context! */
 448 {
 449         int status = transfer->status;
 450         MTS_INT_INIT();
 451
 452         if ( unlikely(status) ) {
 453                 if (status == -ENOENT) {
 454                         /* We are being killed */
 455                         MTS_DEBUG_GOT_HERE();
 456                         set_host_byte(context->srb, DID_ABORT);
 457                 } else {
 458                         /* A genuine error has occurred */
 459                         MTS_DEBUG_GOT_HERE();
 460
 461                         set_host_byte(context->srb, DID_ERROR);
 462                 }
 463                 mts_transfer_cleanup(transfer);
 464
 465                 return;
 466         }
 467
 468         if (context->srb->cmnd[0] == REQUEST_SENSE) {
 469                 mts_int_submit_urb(transfer,
 470                                    context->data_pipe,
 471                                    context->srb->sense_buffer,
 472                                    context->data_length,
 473                                    mts_data_done);
 474         } else { if ( context->data ) {
 475                         mts_int_submit_urb(transfer,
 476                                            context->data_pipe,
 477                                            context->data,
 478                                            context->data_length,
 479                                            scsi_sg_count(context->srb) > 1 ?
 480                                                    mts_do_sg : mts_data_done);
 481                 } else {
 482                         mts_get_status(transfer);
 483                 }
 484         }
 485 }
 486
 487 static void mts_do_sg (struct urb* transfer)
 488 {
 489         int status = transfer->status;
 490         MTS_INT_INIT();
 491
 492         MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
 493                                                   scsi_sg_count(context->srb));
 494
 495         if (unlikely(status)) {
 496                 set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR));
 497                 mts_transfer_cleanup(transfer);
 498         }
 499
 500         context->curr_sg = sg_next(context->curr_sg);
 501         mts_int_submit_urb(transfer,
 502                            context->data_pipe,
 503                            sg_virt(context->curr_sg),
 504                            context->curr_sg->length,
 505                            sg_is_last(context->curr_sg) ?
 506                            mts_data_done : mts_do_sg);
 507 }
 508
 509 static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
 510 static const u8 mts_read_image_sig_len = 4;
 511 static const unsigned char mts_direction[256/8] = {
 512         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
 513         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
 514         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
 515         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 516 };
 517
 518
 519 #define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
 520
 521 static void
 522 mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
 523 {
 524         int pipe;
 525
 526         MTS_DEBUG_GOT_HERE();
 527
 528         desc->context.instance = desc;
 529         desc->context.srb = srb;
 530
 531         if (!scsi_bufflen(srb)) {
 532                 desc->context.data = NULL;
 533                 desc->context.data_length = 0;
 534                 return;
 535         } else {
 536                 desc->context.curr_sg = scsi_sglist(srb);
 537                 desc->context.data = sg_virt(desc->context.curr_sg);
 538                 desc->context.data_length = desc->context.curr_sg->length;
 539         }
 540
 541
 542         /* can't rely on srb->sc_data_direction */
 543
 544         /* Brutally ripped from usb-storage */
 545
 546         if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
 547 ) {             pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
 548                 MTS_DEBUG( "transferring from desc->ep_image == %d\n",
 549                            (int)desc->ep_image );
 550         } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
 551                         pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
 552                         MTS_DEBUG( "transferring from desc->ep_response == %d\n",
 553                                    (int)desc->ep_response);
 554         } else {
 555                 MTS_DEBUG("transferring to desc->ep_out == %d\n",
 556                           (int)desc->ep_out);
 557                 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
 558         }
 559         desc->context.data_pipe = pipe;
 560 }
 561
 562 static int mts_scsi_queuecommand_lck(struct scsi_cmnd *srb)
 563 {
 564         mts_scsi_cmnd_callback callback = scsi_done;
 565         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 566         int res;
 567
 568         MTS_DEBUG_GOT_HERE();
 569         mts_show_command(srb);
 570         mts_debug_dump(desc);
 571
 572         if ( srb->device->lun || srb->device->id || srb->device->channel ) {
 573
 574                 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 );
 575
 576                 MTS_DEBUG("this device doesn't exist\n");
 577
 578                 set_host_byte(srb, DID_BAD_TARGET);
 579
 580                 if(likely(callback != NULL))
 581                         callback(srb);
 582
 583                 goto out;
 584         }
 585
 586
 587         usb_fill_bulk_urb(desc->urb,
 588                       desc->usb_dev,
 589                       usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
 590                       srb->cmnd,
 591                       srb->cmd_len,
 592                       mts_command_done,
 593                       &desc->context
 594                       );
 595
 596
 597         mts_build_transfer_context( srb, desc );
 598         desc->context.final_callback = callback;
 599
 600         /* here we need ATOMIC as we are called with the iolock */
 601         res=usb_submit_urb(desc->urb, GFP_ATOMIC);
 602
 603         if(unlikely(res)){
 604                 MTS_ERROR("error %d submitting URB\n",(int)res);
 605                 set_host_byte(srb, DID_ERROR);
 606
 607                 if(likely(callback != NULL))
 608                         callback(srb);
 609
 610         }
 611 out:
 612         return 0;
 613 }
 614
 615 static DEF_SCSI_QCMD(mts_scsi_queuecommand)
 616
 617 static const struct scsi_host_template mts_scsi_host_template = {
 618         .module                 = THIS_MODULE,
 619         .name                   = "microtekX6",
 620         .proc_name              = "microtekX6",
 621         .queuecommand           = mts_scsi_queuecommand,
 622         .eh_abort_handler       = mts_scsi_abort,
 623         .eh_host_reset_handler  = mts_scsi_host_reset,
 624         .sg_tablesize =         SG_ALL,
 625         .can_queue =            1,
 626         .this_id =              -1,
 627         .emulated =             1,
 628         .dma_alignment =        511,
 629         .slave_alloc =          mts_slave_alloc,
 630         .max_sectors=           256, /* 128 K */
 631 };
 632
 633 /* The entries of microtek_table must correspond, line-by-line to
 634    the entries of mts_supported_products[]. */
 635
 636 static const struct usb_device_id mts_usb_ids[] =
 637 {
 638         { USB_DEVICE(0x4ce, 0x0300) },
 639         { USB_DEVICE(0x5da, 0x0094) },
 640         { USB_DEVICE(0x5da, 0x0099) },
 641         { USB_DEVICE(0x5da, 0x009a) },
 642         { USB_DEVICE(0x5da, 0x00a0) },
 643         { USB_DEVICE(0x5da, 0x00a3) },
 644         { USB_DEVICE(0x5da, 0x80a3) },
 645         { USB_DEVICE(0x5da, 0x80ac) },
 646         { USB_DEVICE(0x5da, 0x00b6) },
 647         { }                                             /* Terminating entry */
 648 };
 649
 650 MODULE_DEVICE_TABLE (usb, mts_usb_ids);
 651
 652
 653 static int mts_usb_probe(struct usb_interface *intf,
 654                          const struct usb_device_id *id)
 655 {
 656         int i;
 657         int ep_out = -1;
 658         int ep_in_set[3]; /* this will break if we have more than three endpoints
 659                            which is why we check */
 660         int *ep_in_current = ep_in_set;
 661         int err_retval = -ENOMEM;
 662
 663         struct mts_desc * new_desc;
 664         struct usb_device *dev = interface_to_usbdev (intf);
 665
 666         /* the current altsetting on the interface we're probing */
 667         struct usb_host_interface *altsetting;
 668
 669         MTS_DEBUG_GOT_HERE();
 670         MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
 671
 672         MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
 673                    le16_to_cpu(dev->descriptor.idProduct),
 674                    le16_to_cpu(dev->descriptor.idVendor) );
 675
 676         MTS_DEBUG_GOT_HERE();
 677
 678         /* the current altsetting on the interface we're probing */
 679         altsetting = intf->cur_altsetting;
 680
 681
 682         /* Check if the config is sane */
 683
 684         if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
 685                 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
 686                              (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
 687                 return -ENODEV;
 688         }
 689
 690         for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
 691                 if ((altsetting->endpoint[i].desc.bmAttributes &
 692                      USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
 693
 694                         MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
 695                              (int)altsetting->endpoint[i].desc.bEndpointAddress );
 696                 } else {
 697                         if (altsetting->endpoint[i].desc.bEndpointAddress &
 698                             USB_DIR_IN)
 699                                 *ep_in_current++
 700                                         = altsetting->endpoint[i].desc.bEndpointAddress &
 701                                         USB_ENDPOINT_NUMBER_MASK;
 702                         else {
 703                                 if ( ep_out != -1 ) {
 704                                         MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
 705                                         return -ENODEV;
 706                                 }
 707
 708                                 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
 709                                         USB_ENDPOINT_NUMBER_MASK;
 710                         }
 711                 }
 712
 713         }
 714
 715         if (ep_in_current != &ep_in_set[2]) {
 716                 MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n");
 717                 return -ENODEV;
 718         }
 719
 720         if ( ep_out == -1 ) {
 721                 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
 722                 return -ENODEV;
 723         }
 724
 725
 726         new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
 727         if (!new_desc)
 728                 goto out;
 729
 730         new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
 731         if (!new_desc->urb)
 732                 goto out_kfree;
 733
 734         new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
 735         if (!new_desc->context.scsi_status)
 736                 goto out_free_urb;
 737
 738         new_desc->usb_dev = dev;
 739         new_desc->usb_intf = intf;
 740
 741         /* endpoints */
 742         new_desc->ep_out = ep_out;
 743         new_desc->ep_response = ep_in_set[0];
 744         new_desc->ep_image = ep_in_set[1];
 745
 746         if ( new_desc->ep_out != MTS_EP_OUT )
 747                 MTS_WARNING( "will this work? Command EP is not usually %d\n",
 748                              (int)new_desc->ep_out );
 749
 750         if ( new_desc->ep_response != MTS_EP_RESPONSE )
 751                 MTS_WARNING( "will this work? Response EP is not usually %d\n",
 752                              (int)new_desc->ep_response );
 753
 754         if ( new_desc->ep_image != MTS_EP_IMAGE )
 755                 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
 756                              (int)new_desc->ep_image );
 757
 758         new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
 759                         sizeof(new_desc));
 760         if (!new_desc->host)
 761                 goto out_kfree2;
 762
 763         new_desc->host->hostdata[0] = (unsigned long)new_desc;
 764         if (scsi_add_host(new_desc->host, &dev->dev)) {
 765                 err_retval = -EIO;
 766                 goto out_host_put;
 767         }
 768         scsi_scan_host(new_desc->host);
 769
 770         usb_set_intfdata(intf, new_desc);
 771         return 0;
 772
 773  out_host_put:
 774         scsi_host_put(new_desc->host);
 775  out_kfree2:
 776         kfree(new_desc->context.scsi_status);
 777  out_free_urb:
 778         usb_free_urb(new_desc->urb);
 779  out_kfree:
 780         kfree(new_desc);
 781  out:
 782         return err_retval;
 783 }
 784
 785 static void mts_usb_disconnect (struct usb_interface *intf)
 786 {
 787         struct mts_desc *desc = usb_get_intfdata(intf);
 788
 789         usb_set_intfdata(intf, NULL);
 790
 791         usb_kill_urb(desc->urb);
 792         scsi_remove_host(desc->host);
 793
 794         scsi_host_put(desc->host);
 795         usb_free_urb(desc->urb);
 796         kfree(desc->context.scsi_status);
 797         kfree(desc);
 798 }
 799
 800 module_usb_driver(mts_usb_driver);
 801
 802 MODULE_AUTHOR( DRIVER_AUTHOR );
 803 MODULE_DESCRIPTION( DRIVER_DESC );
 804 MODULE_LICENSE("GPL");