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/init.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 /*
 142  * Version Information
 143  */
 144 #define DRIVER_VERSION "v0.4.3"
 145 #define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
 146 #define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
 147
 148 /* Should we do debugging? */
 149
 150 //#define MTS_DO_DEBUG
 151
 152 /* USB layer driver interface */
 153
 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( "  %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
 304                srb->cmnd[0], srb->cmnd[1], srb->cmnd[2], srb->cmnd[3], srb->cmnd[4], srb->cmnd[5],
 305                srb->cmnd[6], srb->cmnd[7], srb->cmnd[8], srb->cmnd[9]);
 306 }
 307
 308 #else
 309
 310 static inline void mts_show_command(struct scsi_cmnd * dummy)
 311 {
 312 }
 313
 314 static inline void mts_debug_dump(struct mts_desc* dummy)
 315 {
 316 }
 317
 318 #endif
 319
 320 static inline void mts_urb_abort(struct mts_desc* desc) {
 321         MTS_DEBUG_GOT_HERE();
 322         mts_debug_dump(desc);
 323
 324         usb_kill_urb( desc->urb );
 325 }
 326
 327 static int mts_slave_alloc (struct scsi_device *s)
 328 {
 329         s->inquiry_len = 0x24;
 330         return 0;
 331 }
 332
 333 static int mts_slave_configure (struct scsi_device *s)
 334 {
 335         blk_queue_dma_alignment(s->request_queue, (512 - 1));
 336         return 0;
 337 }
 338
 339 static int mts_scsi_abort(struct scsi_cmnd *srb)
 340 {
 341         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 342
 343         MTS_DEBUG_GOT_HERE();
 344
 345         mts_urb_abort(desc);
 346
 347         return FAILED;
 348 }
 349
 350 static int mts_scsi_host_reset(struct scsi_cmnd *srb)
 351 {
 352         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 353         int result;
 354
 355         MTS_DEBUG_GOT_HERE();
 356         mts_debug_dump(desc);
 357
 358         result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
 359         if (result == 0) {
 360                 result = usb_reset_device(desc->usb_dev);
 361                 usb_unlock_device(desc->usb_dev);
 362         }
 363         return result ? FAILED : SUCCESS;
 364 }
 365
 366 static int
 367 mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb);
 368
 369 static void mts_transfer_cleanup( struct urb *transfer );
 370 static void mts_do_sg(struct urb * transfer);
 371
 372 static inline
 373 void mts_int_submit_urb (struct urb* transfer,
 374                         int pipe,
 375                         void* data,
 376                         unsigned length,
 377                         usb_complete_t callback )
 378 /* Interrupt context! */
 379
 380 /* Holding transfer->context->lock! */
 381 {
 382         int res;
 383
 384         MTS_INT_INIT();
 385
 386         usb_fill_bulk_urb(transfer,
 387                       context->instance->usb_dev,
 388                       pipe,
 389                       data,
 390                       length,
 391                       callback,
 392                       context
 393                 );
 394
 395         res = usb_submit_urb( transfer, GFP_ATOMIC );
 396         if ( unlikely(res) ) {
 397                 MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
 398                 context->srb->result = DID_ERROR << 16;
 399                 mts_transfer_cleanup(transfer);
 400         }
 401 }
 402
 403
 404 static void mts_transfer_cleanup( struct urb *transfer )
 405 /* Interrupt context! */
 406 {
 407         MTS_INT_INIT();
 408
 409         if ( likely(context->final_callback != NULL) )
 410                 context->final_callback(context->srb);
 411 }
 412
 413 static void mts_transfer_done( struct urb *transfer )
 414 {
 415         MTS_INT_INIT();
 416
 417         context->srb->result &= MTS_SCSI_ERR_MASK;
 418         context->srb->result |= (unsigned)(*context->scsi_status)<<1;
 419
 420         mts_transfer_cleanup(transfer);
 421 }
 422
 423
 424 static void mts_get_status( struct urb *transfer )
 425 /* Interrupt context! */
 426 {
 427         MTS_INT_INIT();
 428
 429         mts_int_submit_urb(transfer,
 430                            usb_rcvbulkpipe(context->instance->usb_dev,
 431                                            context->instance->ep_response),
 432                            context->scsi_status,
 433                            1,
 434                            mts_transfer_done );
 435 }
 436
 437 static void mts_data_done( struct urb* transfer )
 438 /* Interrupt context! */
 439 {
 440         int status = transfer->status;
 441         MTS_INT_INIT();
 442
 443         if ( context->data_length != transfer->actual_length ) {
 444                 scsi_set_resid(context->srb, context->data_length -
 445                                transfer->actual_length);
 446         } else if ( unlikely(status) ) {
 447                 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
 448         }
 449
 450         mts_get_status(transfer);
 451 }
 452
 453
 454 static void mts_command_done( struct urb *transfer )
 455 /* Interrupt context! */
 456 {
 457         int status = transfer->status;
 458         MTS_INT_INIT();
 459
 460         if ( unlikely(status) ) {
 461                 if (status == -ENOENT) {
 462                         /* We are being killed */
 463                         MTS_DEBUG_GOT_HERE();
 464                         context->srb->result = DID_ABORT<<16;
 465                 } else {
 466                         /* A genuine error has occurred */
 467                         MTS_DEBUG_GOT_HERE();
 468
 469                         context->srb->result = DID_ERROR<<16;
 470                 }
 471                 mts_transfer_cleanup(transfer);
 472
 473                 return;
 474         }
 475
 476         if (context->srb->cmnd[0] == REQUEST_SENSE) {
 477                 mts_int_submit_urb(transfer,
 478                                    context->data_pipe,
 479                                    context->srb->sense_buffer,
 480                                    context->data_length,
 481                                    mts_data_done);
 482         } else { if ( context->data ) {
 483                         mts_int_submit_urb(transfer,
 484                                            context->data_pipe,
 485                                            context->data,
 486                                            context->data_length,
 487                                            scsi_sg_count(context->srb) > 1 ?
 488                                                    mts_do_sg : mts_data_done);
 489                 } else {
 490                         mts_get_status(transfer);
 491                 }
 492         }
 493 }
 494
 495 static void mts_do_sg (struct urb* transfer)
 496 {
 497         struct scatterlist * sg;
 498         int status = transfer->status;
 499         MTS_INT_INIT();
 500
 501         MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,
 502                                                   scsi_sg_count(context->srb));
 503
 504         if (unlikely(status)) {
 505                 context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
 506                 mts_transfer_cleanup(transfer);
 507         }
 508
 509         sg = scsi_sglist(context->srb);
 510         context->fragment++;
 511         mts_int_submit_urb(transfer,
 512                            context->data_pipe,
 513                            sg_virt(&sg[context->fragment]),
 514                            sg[context->fragment].length,
 515                            context->fragment + 1 == scsi_sg_count(context->srb) ?
 516                            mts_data_done : mts_do_sg);
 517 }
 518
 519 static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
 520 static const u8 mts_read_image_sig_len = 4;
 521 static const unsigned char mts_direction[256/8] = {
 522         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
 523         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
 524         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
 525         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 526 };
 527
 528
 529 #define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
 530
 531 static void
 532 mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
 533 {
 534         int pipe;
 535         struct scatterlist * sg;
 536
 537         MTS_DEBUG_GOT_HERE();
 538
 539         desc->context.instance = desc;
 540         desc->context.srb = srb;
 541         desc->context.fragment = 0;
 542
 543         if (!scsi_bufflen(srb)) {
 544                 desc->context.data = NULL;
 545                 desc->context.data_length = 0;
 546                 return;
 547         } else {
 548                 sg = scsi_sglist(srb);
 549                 desc->context.data = sg_virt(&sg[0]);
 550                 desc->context.data_length = sg[0].length;
 551         }
 552
 553
 554         /* can't rely on srb->sc_data_direction */
 555
 556         /* Brutally ripped from usb-storage */
 557
 558         if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
 559 ) {             pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
 560                 MTS_DEBUG( "transferring from desc->ep_image == %d\n",
 561                            (int)desc->ep_image );
 562         } else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
 563                         pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
 564                         MTS_DEBUG( "transferring from desc->ep_response == %d\n",
 565                                    (int)desc->ep_response);
 566         } else {
 567                 MTS_DEBUG("transferring to desc->ep_out == %d\n",
 568                           (int)desc->ep_out);
 569                 pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
 570         }
 571         desc->context.data_pipe = pipe;
 572 }
 573
 574
 575 static int
 576 mts_scsi_queuecommand_lck(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
 577 {
 578         struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
 579         int err = 0;
 580         int res;
 581
 582         MTS_DEBUG_GOT_HERE();
 583         mts_show_command(srb);
 584         mts_debug_dump(desc);
 585
 586         if ( srb->device->lun || srb->device->id || srb->device->channel ) {
 587
 588                 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 );
 589
 590                 MTS_DEBUG("this device doesn't exist\n");
 591
 592                 srb->result = DID_BAD_TARGET << 16;
 593
 594                 if(likely(callback != NULL))
 595                         callback(srb);
 596
 597                 goto out;
 598         }
 599
 600
 601         usb_fill_bulk_urb(desc->urb,
 602                       desc->usb_dev,
 603                       usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
 604                       srb->cmnd,
 605                       srb->cmd_len,
 606                       mts_command_done,
 607                       &desc->context
 608                       );
 609
 610
 611         mts_build_transfer_context( srb, desc );
 612         desc->context.final_callback = callback;
 613
 614         /* here we need ATOMIC as we are called with the iolock */
 615         res=usb_submit_urb(desc->urb, GFP_ATOMIC);
 616
 617         if(unlikely(res)){
 618                 MTS_ERROR("error %d submitting URB\n",(int)res);
 619                 srb->result = DID_ERROR << 16;
 620
 621                 if(likely(callback != NULL))
 622                         callback(srb);
 623
 624         }
 625 out:
 626         return err;
 627 }
 628
 629 static DEF_SCSI_QCMD(mts_scsi_queuecommand)
 630
 631 static struct scsi_host_template mts_scsi_host_template = {
 632         .module                 = THIS_MODULE,
 633         .name                   = "microtekX6",
 634         .proc_name              = "microtekX6",
 635         .queuecommand           = mts_scsi_queuecommand,
 636         .eh_abort_handler       = mts_scsi_abort,
 637         .eh_host_reset_handler  = mts_scsi_host_reset,
 638         .sg_tablesize =         SG_ALL,
 639         .can_queue =            1,
 640         .this_id =              -1,
 641         .cmd_per_lun =          1,
 642         .use_clustering =       1,
 643         .emulated =             1,
 644         .slave_alloc =          mts_slave_alloc,
 645         .slave_configure =      mts_slave_configure,
 646         .max_sectors=           256, /* 128 K */
 647 };
 648
 649 /* The entries of microtek_table must correspond, line-by-line to
 650    the entries of mts_supported_products[]. */
 651
 652 static const struct usb_device_id mts_usb_ids[] =
 653 {
 654         { USB_DEVICE(0x4ce, 0x0300) },
 655         { USB_DEVICE(0x5da, 0x0094) },
 656         { USB_DEVICE(0x5da, 0x0099) },
 657         { USB_DEVICE(0x5da, 0x009a) },
 658         { USB_DEVICE(0x5da, 0x00a0) },
 659         { USB_DEVICE(0x5da, 0x00a3) },
 660         { USB_DEVICE(0x5da, 0x80a3) },
 661         { USB_DEVICE(0x5da, 0x80ac) },
 662         { USB_DEVICE(0x5da, 0x00b6) },
 663         { }                                             /* Terminating entry */
 664 };
 665
 666 MODULE_DEVICE_TABLE (usb, mts_usb_ids);
 667
 668
 669 static int mts_usb_probe(struct usb_interface *intf,
 670                          const struct usb_device_id *id)
 671 {
 672         int i;
 673         int ep_out = -1;
 674         int ep_in_set[3]; /* this will break if we have more than three endpoints
 675                            which is why we check */
 676         int *ep_in_current = ep_in_set;
 677         int err_retval = -ENOMEM;
 678
 679         struct mts_desc * new_desc;
 680         struct usb_device *dev = interface_to_usbdev (intf);
 681
 682         /* the current altsetting on the interface we're probing */
 683         struct usb_host_interface *altsetting;
 684
 685         MTS_DEBUG_GOT_HERE();
 686         MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
 687
 688         MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
 689                    le16_to_cpu(dev->descriptor.idProduct),
 690                    le16_to_cpu(dev->descriptor.idVendor) );
 691
 692         MTS_DEBUG_GOT_HERE();
 693
 694         /* the current altsetting on the interface we're probing */
 695         altsetting = intf->cur_altsetting;
 696
 697
 698         /* Check if the config is sane */
 699
 700         if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
 701                 MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
 702                              (int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
 703                 return -ENODEV;
 704         }
 705
 706         for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
 707                 if ((altsetting->endpoint[i].desc.bmAttributes &
 708                      USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
 709
 710                         MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
 711                              (int)altsetting->endpoint[i].desc.bEndpointAddress );
 712                 } else {
 713                         if (altsetting->endpoint[i].desc.bEndpointAddress &
 714                             USB_DIR_IN)
 715                                 *ep_in_current++
 716                                         = altsetting->endpoint[i].desc.bEndpointAddress &
 717                                         USB_ENDPOINT_NUMBER_MASK;
 718                         else {
 719                                 if ( ep_out != -1 ) {
 720                                         MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
 721                                         return -ENODEV;
 722                                 }
 723
 724                                 ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
 725                                         USB_ENDPOINT_NUMBER_MASK;
 726                         }
 727                 }
 728
 729         }
 730
 731
 732         if ( ep_out == -1 ) {
 733                 MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
 734                 return -ENODEV;
 735         }
 736
 737
 738         new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
 739         if (!new_desc)
 740                 goto out;
 741
 742         new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
 743         if (!new_desc->urb)
 744                 goto out_kfree;
 745
 746         new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
 747         if (!new_desc->context.scsi_status)
 748                 goto out_free_urb;
 749
 750         new_desc->usb_dev = dev;
 751         new_desc->usb_intf = intf;
 752
 753         /* endpoints */
 754         new_desc->ep_out = ep_out;
 755         new_desc->ep_response = ep_in_set[0];
 756         new_desc->ep_image = ep_in_set[1];
 757
 758         if ( new_desc->ep_out != MTS_EP_OUT )
 759                 MTS_WARNING( "will this work? Command EP is not usually %d\n",
 760                              (int)new_desc->ep_out );
 761
 762         if ( new_desc->ep_response != MTS_EP_RESPONSE )
 763                 MTS_WARNING( "will this work? Response EP is not usually %d\n",
 764                              (int)new_desc->ep_response );
 765
 766         if ( new_desc->ep_image != MTS_EP_IMAGE )
 767                 MTS_WARNING( "will this work? Image data EP is not usually %d\n",
 768                              (int)new_desc->ep_image );
 769
 770         new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
 771                         sizeof(new_desc));
 772         if (!new_desc->host)
 773                 goto out_kfree2;
 774
 775         new_desc->host->hostdata[0] = (unsigned long)new_desc;
 776         if (scsi_add_host(new_desc->host, &dev->dev)) {
 777                 err_retval = -EIO;
 778                 goto out_host_put;
 779         }
 780         scsi_scan_host(new_desc->host);
 781
 782         usb_set_intfdata(intf, new_desc);
 783         return 0;
 784
 785  out_host_put:
 786         scsi_host_put(new_desc->host);
 787  out_kfree2:
 788         kfree(new_desc->context.scsi_status);
 789  out_free_urb:
 790         usb_free_urb(new_desc->urb);
 791  out_kfree:
 792         kfree(new_desc);
 793  out:
 794         return err_retval;
 795 }
 796
 797 static void mts_usb_disconnect (struct usb_interface *intf)
 798 {
 799         struct mts_desc *desc = usb_get_intfdata(intf);
 800
 801         usb_set_intfdata(intf, NULL);
 802
 803         usb_kill_urb(desc->urb);
 804         scsi_remove_host(desc->host);
 805
 806         scsi_host_put(desc->host);
 807         usb_free_urb(desc->urb);
 808         kfree(desc->context.scsi_status);
 809         kfree(desc);
 810 }
 811
 812
 813 static int __init microtek_drv_init(void)
 814 {
 815         return usb_register(&mts_usb_driver);
 816 }
 817
 818 static void __exit microtek_drv_exit(void)
 819 {
 820         usb_deregister(&mts_usb_driver);
 821 }
 822
 823 module_init(microtek_drv_init);
 824 module_exit(microtek_drv_exit);
 825
 826 MODULE_AUTHOR( DRIVER_AUTHOR );
 827 MODULE_DESCRIPTION( DRIVER_DESC );
 828 MODULE_LICENSE("GPL");