kernel/drivers/usb/storage/jumpshot.c

   1 /* Driver for Lexar "Jumpshot" Compact Flash reader
   2  *
   3  * jumpshot driver v0.1:
   4  *
   5  * First release
   6  *
   7  * Current development and maintenance by:
   8  *   (c) 2000 Jimmie Mayfield (mayfield+usb@sackheads.org)
   9  *
  10  *   Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
  11  *   which I used as a template for this driver.
  12  *
  13  *   Some bugfixes and scatter-gather code by Gregory P. Smith
  14  *   (greg-usb@electricrain.com)
  15  *
  16  *   Fix for media change by Joerg Schneider (js@joergschneider.com)
  17  *
  18  * Developed with the assistance of:
  19  *
  20  *   (C) 2002 Alan Stern <stern@rowland.org>
  21  *
  22  * This program is free software; you can redistribute it and/or modify it
  23  * under the terms of the GNU General Public License as published by the
  24  * Free Software Foundation; either version 2, or (at your option) any
  25  * later version.
  26  *
  27  * This program is distributed in the hope that it will be useful, but
  28  * WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  30  * General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License along
  33  * with this program; if not, write to the Free Software Foundation, Inc.,
  34  * 675 Mass Ave, Cambridge, MA 02139, USA.
  35  */
  36
  37  /*
  38   * This driver attempts to support the Lexar Jumpshot USB CompactFlash
  39   * reader.  Like many other USB CompactFlash readers, the Jumpshot contains
  40   * a USB-to-ATA chip.
  41   *
  42   * This driver supports reading and writing.  If you're truly paranoid,
  43   * however, you can force the driver into a write-protected state by setting
  44   * the WP enable bits in jumpshot_handle_mode_sense.  See the comments
  45   * in that routine.
  46   */
  47
  48 #include <linux/errno.h>
  49 #include <linux/module.h>
  50 #include <linux/slab.h>
  51
  52 #include <scsi/scsi.h>
  53 #include <scsi/scsi_cmnd.h>
  54
  55 #include "usb.h"
  56 #include "transport.h"
  57 #include "protocol.h"
  58 #include "debug.h"
  59
  60
  61 MODULE_DESCRIPTION("Driver for Lexar \"Jumpshot\" Compact Flash reader");
  62 MODULE_AUTHOR("Jimmie Mayfield <mayfield+usb@sackheads.org>");
  63 MODULE_LICENSE("GPL");
  64
  65 /*
  66  * The table of devices
  67  */
  68 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
  69                     vendorName, productName, useProtocol, useTransport, \
  70                     initFunction, flags) \
  71 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  72   .driver_info = (flags) }
  73
  74 static struct usb_device_id jumpshot_usb_ids[] = {
  75 #       include "unusual_jumpshot.h"
  76         { }             /* Terminating entry */
  77 };
  78 MODULE_DEVICE_TABLE(usb, jumpshot_usb_ids);
  79
  80 #undef UNUSUAL_DEV
  81
  82 /*
  83  * The flags table
  84  */
  85 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
  86                     vendor_name, product_name, use_protocol, use_transport, \
  87                     init_function, Flags) \
  88 { \
  89         .vendorName = vendor_name,      \
  90         .productName = product_name,    \
  91         .useProtocol = use_protocol,    \
  92         .useTransport = use_transport,  \
  93         .initFunction = init_function,  \
  94 }
  95
  96 static struct us_unusual_dev jumpshot_unusual_dev_list[] = {
  97 #       include "unusual_jumpshot.h"
  98         { }             /* Terminating entry */
  99 };
 100
 101 #undef UNUSUAL_DEV
 102
 103
 104 struct jumpshot_info {
 105    unsigned long   sectors;     /* total sector count */
 106    unsigned long   ssize;       /* sector size in bytes */
 107
 108    /* the following aren't used yet */
 109    unsigned char   sense_key;
 110    unsigned long   sense_asc;   /* additional sense code */
 111    unsigned long   sense_ascq;  /* additional sense code qualifier */
 112 };
 113
 114 static inline int jumpshot_bulk_read(struct us_data *us,
 115                                      unsigned char *data,
 116                                      unsigned int len)
 117 {
 118         if (len == 0)
 119                 return USB_STOR_XFER_GOOD;
 120
 121         usb_stor_dbg(us, "len = %d\n", len);
 122         return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
 123                         data, len, NULL);
 124 }
 125
 126
 127 static inline int jumpshot_bulk_write(struct us_data *us,
 128                                       unsigned char *data,
 129                                       unsigned int len)
 130 {
 131         if (len == 0)
 132                 return USB_STOR_XFER_GOOD;
 133
 134         usb_stor_dbg(us, "len = %d\n", len);
 135         return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
 136                         data, len, NULL);
 137 }
 138
 139
 140 static int jumpshot_get_status(struct us_data  *us)
 141 {
 142         int rc;
 143
 144         if (!us)
 145                 return USB_STOR_TRANSPORT_ERROR;
 146
 147         // send the setup
 148         rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
 149                                    0, 0xA0, 0, 7, us->iobuf, 1);
 150
 151         if (rc != USB_STOR_XFER_GOOD)
 152                 return USB_STOR_TRANSPORT_ERROR;
 153
 154         if (us->iobuf[0] != 0x50) {
 155                 usb_stor_dbg(us, "0x%2x\n", us->iobuf[0]);
 156                 return USB_STOR_TRANSPORT_ERROR;
 157         }
 158
 159         return USB_STOR_TRANSPORT_GOOD;
 160 }
 161
 162 static int jumpshot_read_data(struct us_data *us,
 163                               struct jumpshot_info *info,
 164                               u32 sector,
 165                               u32 sectors)
 166 {
 167         unsigned char *command = us->iobuf;
 168         unsigned char *buffer;
 169         unsigned char  thistime;
 170         unsigned int totallen, alloclen;
 171         int len, result;
 172         unsigned int sg_offset = 0;
 173         struct scatterlist *sg = NULL;
 174
 175         // we're working in LBA mode.  according to the ATA spec,
 176         // we can support up to 28-bit addressing.  I don't know if Jumpshot
 177         // supports beyond 24-bit addressing.  It's kind of hard to test
 178         // since it requires > 8GB CF card.
 179
 180         if (sector > 0x0FFFFFFF)
 181                 return USB_STOR_TRANSPORT_ERROR;
 182
 183         totallen = sectors * info->ssize;
 184
 185         // Since we don't read more than 64 KB at a time, we have to create
 186         // a bounce buffer and move the data a piece at a time between the
 187         // bounce buffer and the actual transfer buffer.
 188
 189         alloclen = min(totallen, 65536u);
 190         buffer = kmalloc(alloclen, GFP_NOIO);
 191         if (buffer == NULL)
 192                 return USB_STOR_TRANSPORT_ERROR;
 193
 194         do {
 195                 // loop, never allocate or transfer more than 64k at once
 196                 // (min(128k, 255*info->ssize) is the real limit)
 197                 len = min(totallen, alloclen);
 198                 thistime = (len / info->ssize) & 0xff;
 199
 200                 command[0] = 0;
 201                 command[1] = thistime;
 202                 command[2] = sector & 0xFF;
 203                 command[3] = (sector >>  8) & 0xFF;
 204                 command[4] = (sector >> 16) & 0xFF;
 205
 206                 command[5] = 0xE0 | ((sector >> 24) & 0x0F);
 207                 command[6] = 0x20;
 208
 209                 // send the setup + command
 210                 result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
 211                                                0, 0x20, 0, 1, command, 7);
 212                 if (result != USB_STOR_XFER_GOOD)
 213                         goto leave;
 214
 215                 // read the result
 216                 result = jumpshot_bulk_read(us, buffer, len);
 217                 if (result != USB_STOR_XFER_GOOD)
 218                         goto leave;
 219
 220                 usb_stor_dbg(us, "%d bytes\n", len);
 221
 222                 // Store the data in the transfer buffer
 223                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 224                                  &sg, &sg_offset, TO_XFER_BUF);
 225
 226                 sector += thistime;
 227                 totallen -= len;
 228         } while (totallen > 0);
 229
 230         kfree(buffer);
 231         return USB_STOR_TRANSPORT_GOOD;
 232
 233  leave:
 234         kfree(buffer);
 235         return USB_STOR_TRANSPORT_ERROR;
 236 }
 237
 238
 239 static int jumpshot_write_data(struct us_data *us,
 240                                struct jumpshot_info *info,
 241                                u32 sector,
 242                                u32 sectors)
 243 {
 244         unsigned char *command = us->iobuf;
 245         unsigned char *buffer;
 246         unsigned char  thistime;
 247         unsigned int totallen, alloclen;
 248         int len, result, waitcount;
 249         unsigned int sg_offset = 0;
 250         struct scatterlist *sg = NULL;
 251
 252         // we're working in LBA mode.  according to the ATA spec,
 253         // we can support up to 28-bit addressing.  I don't know if Jumpshot
 254         // supports beyond 24-bit addressing.  It's kind of hard to test
 255         // since it requires > 8GB CF card.
 256         //
 257         if (sector > 0x0FFFFFFF)
 258                 return USB_STOR_TRANSPORT_ERROR;
 259
 260         totallen = sectors * info->ssize;
 261
 262         // Since we don't write more than 64 KB at a time, we have to create
 263         // a bounce buffer and move the data a piece at a time between the
 264         // bounce buffer and the actual transfer buffer.
 265
 266         alloclen = min(totallen, 65536u);
 267         buffer = kmalloc(alloclen, GFP_NOIO);
 268         if (buffer == NULL)
 269                 return USB_STOR_TRANSPORT_ERROR;
 270
 271         do {
 272                 // loop, never allocate or transfer more than 64k at once
 273                 // (min(128k, 255*info->ssize) is the real limit)
 274
 275                 len = min(totallen, alloclen);
 276                 thistime = (len / info->ssize) & 0xff;
 277
 278                 // Get the data from the transfer buffer
 279                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 280                                 &sg, &sg_offset, FROM_XFER_BUF);
 281
 282                 command[0] = 0;
 283                 command[1] = thistime;
 284                 command[2] = sector & 0xFF;
 285                 command[3] = (sector >>  8) & 0xFF;
 286                 command[4] = (sector >> 16) & 0xFF;
 287
 288                 command[5] = 0xE0 | ((sector >> 24) & 0x0F);
 289                 command[6] = 0x30;
 290
 291                 // send the setup + command
 292                 result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
 293                         0, 0x20, 0, 1, command, 7);
 294                 if (result != USB_STOR_XFER_GOOD)
 295                         goto leave;
 296
 297                 // send the data
 298                 result = jumpshot_bulk_write(us, buffer, len);
 299                 if (result != USB_STOR_XFER_GOOD)
 300                         goto leave;
 301
 302                 // read the result.  apparently the bulk write can complete
 303                 // before the jumpshot drive is finished writing.  so we loop
 304                 // here until we get a good return code
 305                 waitcount = 0;
 306                 do {
 307                         result = jumpshot_get_status(us);
 308                         if (result != USB_STOR_TRANSPORT_GOOD) {
 309                                 // I have not experimented to find the smallest value.
 310                                 //
 311                                 msleep(50);
 312                         }
 313                 } while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));
 314
 315                 if (result != USB_STOR_TRANSPORT_GOOD)
 316                         usb_stor_dbg(us, "Gah!  Waitcount = 10.  Bad write!?\n");
 317
 318                 sector += thistime;
 319                 totallen -= len;
 320         } while (totallen > 0);
 321
 322         kfree(buffer);
 323         return result;
 324
 325  leave:
 326         kfree(buffer);
 327         return USB_STOR_TRANSPORT_ERROR;
 328 }
 329
 330 static int jumpshot_id_device(struct us_data *us,
 331                               struct jumpshot_info *info)
 332 {
 333         unsigned char *command = us->iobuf;
 334         unsigned char *reply;
 335         int      rc;
 336
 337         if (!info)
 338                 return USB_STOR_TRANSPORT_ERROR;
 339
 340         command[0] = 0xE0;
 341         command[1] = 0xEC;
 342         reply = kmalloc(512, GFP_NOIO);
 343         if (!reply)
 344                 return USB_STOR_TRANSPORT_ERROR;
 345
 346         // send the setup
 347         rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
 348                                    0, 0x20, 0, 6, command, 2);
 349
 350         if (rc != USB_STOR_XFER_GOOD) {
 351                 usb_stor_dbg(us, "Gah! send_control for read_capacity failed\n");
 352                 rc = USB_STOR_TRANSPORT_ERROR;
 353                 goto leave;
 354         }
 355
 356         // read the reply
 357         rc = jumpshot_bulk_read(us, reply, 512);
 358         if (rc != USB_STOR_XFER_GOOD) {
 359                 rc = USB_STOR_TRANSPORT_ERROR;
 360                 goto leave;
 361         }
 362
 363         info->sectors = ((u32)(reply[117]) << 24) |
 364                         ((u32)(reply[116]) << 16) |
 365                         ((u32)(reply[115]) <<  8) |
 366                         ((u32)(reply[114])      );
 367
 368         rc = USB_STOR_TRANSPORT_GOOD;
 369
 370  leave:
 371         kfree(reply);
 372         return rc;
 373 }
 374
 375 static int jumpshot_handle_mode_sense(struct us_data *us,
 376                                       struct scsi_cmnd * srb,
 377                                       int sense_6)
 378 {
 379         static unsigned char rw_err_page[12] = {
 380                 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
 381         };
 382         static unsigned char cache_page[12] = {
 383                 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
 384         };
 385         static unsigned char rbac_page[12] = {
 386                 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
 387         };
 388         static unsigned char timer_page[8] = {
 389                 0x1C, 0x6, 0, 0, 0, 0
 390         };
 391         unsigned char pc, page_code;
 392         unsigned int i = 0;
 393         struct jumpshot_info *info = (struct jumpshot_info *) (us->extra);
 394         unsigned char *ptr = us->iobuf;
 395
 396         pc = srb->cmnd[2] >> 6;
 397         page_code = srb->cmnd[2] & 0x3F;
 398
 399         switch (pc) {
 400            case 0x0:
 401                    usb_stor_dbg(us, "Current values\n");
 402                    break;
 403            case 0x1:
 404                    usb_stor_dbg(us, "Changeable values\n");
 405                    break;
 406            case 0x2:
 407                    usb_stor_dbg(us, "Default values\n");
 408                    break;
 409            case 0x3:
 410                    usb_stor_dbg(us, "Saves values\n");
 411                    break;
 412         }
 413
 414         memset(ptr, 0, 8);
 415         if (sense_6) {
 416                 ptr[2] = 0x00;          // WP enable: 0x80
 417                 i = 4;
 418         } else {
 419                 ptr[3] = 0x00;          // WP enable: 0x80
 420                 i = 8;
 421         }
 422
 423         switch (page_code) {
 424            case 0x0:
 425                 // vendor-specific mode
 426                 info->sense_key = 0x05;
 427                 info->sense_asc = 0x24;
 428                 info->sense_ascq = 0x00;
 429                 return USB_STOR_TRANSPORT_FAILED;
 430
 431            case 0x1:
 432                 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
 433                 i += sizeof(rw_err_page);
 434                 break;
 435
 436            case 0x8:
 437                 memcpy(ptr + i, cache_page, sizeof(cache_page));
 438                 i += sizeof(cache_page);
 439                 break;
 440
 441            case 0x1B:
 442                 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
 443                 i += sizeof(rbac_page);
 444                 break;
 445
 446            case 0x1C:
 447                 memcpy(ptr + i, timer_page, sizeof(timer_page));
 448                 i += sizeof(timer_page);
 449                 break;
 450
 451            case 0x3F:
 452                 memcpy(ptr + i, timer_page, sizeof(timer_page));
 453                 i += sizeof(timer_page);
 454                 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
 455                 i += sizeof(rbac_page);
 456                 memcpy(ptr + i, cache_page, sizeof(cache_page));
 457                 i += sizeof(cache_page);
 458                 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
 459                 i += sizeof(rw_err_page);
 460                 break;
 461         }
 462
 463         if (sense_6)
 464                 ptr[0] = i - 1;
 465         else
 466                 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
 467         usb_stor_set_xfer_buf(ptr, i, srb);
 468
 469         return USB_STOR_TRANSPORT_GOOD;
 470 }
 471
 472
 473 static void jumpshot_info_destructor(void *extra)
 474 {
 475         // this routine is a placeholder...
 476         // currently, we don't allocate any extra blocks so we're okay
 477 }
 478
 479
 480
 481 // Transport for the Lexar 'Jumpshot'
 482 //
 483 static int jumpshot_transport(struct scsi_cmnd *srb, struct us_data *us)
 484 {
 485         struct jumpshot_info *info;
 486         int rc;
 487         unsigned long block, blocks;
 488         unsigned char *ptr = us->iobuf;
 489         static unsigned char inquiry_response[8] = {
 490                 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
 491         };
 492
 493         if (!us->extra) {
 494                 us->extra = kzalloc(sizeof(struct jumpshot_info), GFP_NOIO);
 495                 if (!us->extra)
 496                         return USB_STOR_TRANSPORT_ERROR;
 497
 498                 us->extra_destructor = jumpshot_info_destructor;
 499         }
 500
 501         info = (struct jumpshot_info *) (us->extra);
 502
 503         if (srb->cmnd[0] == INQUIRY) {
 504                 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
 505                 memcpy(ptr, inquiry_response, sizeof(inquiry_response));
 506                 fill_inquiry_response(us, ptr, 36);
 507                 return USB_STOR_TRANSPORT_GOOD;
 508         }
 509
 510         if (srb->cmnd[0] == READ_CAPACITY) {
 511                 info->ssize = 0x200;  // hard coded 512 byte sectors as per ATA spec
 512
 513                 rc = jumpshot_get_status(us);
 514                 if (rc != USB_STOR_TRANSPORT_GOOD)
 515                         return rc;
 516
 517                 rc = jumpshot_id_device(us, info);
 518                 if (rc != USB_STOR_TRANSPORT_GOOD)
 519                         return rc;
 520
 521                 usb_stor_dbg(us, "READ_CAPACITY:  %ld sectors, %ld bytes per sector\n",
 522                              info->sectors, info->ssize);
 523
 524                 // build the reply
 525                 //
 526                 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
 527                 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
 528                 usb_stor_set_xfer_buf(ptr, 8, srb);
 529
 530                 return USB_STOR_TRANSPORT_GOOD;
 531         }
 532
 533         if (srb->cmnd[0] == MODE_SELECT_10) {
 534                 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
 535                 return USB_STOR_TRANSPORT_ERROR;
 536         }
 537
 538         if (srb->cmnd[0] == READ_10) {
 539                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 540                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 541
 542                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
 543
 544                 usb_stor_dbg(us, "READ_10: read block 0x%04lx  count %ld\n",
 545                              block, blocks);
 546                 return jumpshot_read_data(us, info, block, blocks);
 547         }
 548
 549         if (srb->cmnd[0] == READ_12) {
 550                 // I don't think we'll ever see a READ_12 but support it anyway...
 551                 //
 552                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 553                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 554
 555                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
 556                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
 557
 558                 usb_stor_dbg(us, "READ_12: read block 0x%04lx  count %ld\n",
 559                              block, blocks);
 560                 return jumpshot_read_data(us, info, block, blocks);
 561         }
 562
 563         if (srb->cmnd[0] == WRITE_10) {
 564                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 565                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 566
 567                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
 568
 569                 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx  count %ld\n",
 570                              block, blocks);
 571                 return jumpshot_write_data(us, info, block, blocks);
 572         }
 573
 574         if (srb->cmnd[0] == WRITE_12) {
 575                 // I don't think we'll ever see a WRITE_12 but support it anyway...
 576                 //
 577                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 578                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 579
 580                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
 581                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
 582
 583                 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx  count %ld\n",
 584                              block, blocks);
 585                 return jumpshot_write_data(us, info, block, blocks);
 586         }
 587
 588
 589         if (srb->cmnd[0] == TEST_UNIT_READY) {
 590                 usb_stor_dbg(us, "TEST_UNIT_READY\n");
 591                 return jumpshot_get_status(us);
 592         }
 593
 594         if (srb->cmnd[0] == REQUEST_SENSE) {
 595                 usb_stor_dbg(us, "REQUEST_SENSE\n");
 596
 597                 memset(ptr, 0, 18);
 598                 ptr[0] = 0xF0;
 599                 ptr[2] = info->sense_key;
 600                 ptr[7] = 11;
 601                 ptr[12] = info->sense_asc;
 602                 ptr[13] = info->sense_ascq;
 603                 usb_stor_set_xfer_buf(ptr, 18, srb);
 604
 605                 return USB_STOR_TRANSPORT_GOOD;
 606         }
 607
 608         if (srb->cmnd[0] == MODE_SENSE) {
 609                 usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
 610                 return jumpshot_handle_mode_sense(us, srb, 1);
 611         }
 612
 613         if (srb->cmnd[0] == MODE_SENSE_10) {
 614                 usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
 615                 return jumpshot_handle_mode_sense(us, srb, 0);
 616         }
 617
 618         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 619                 // sure.  whatever.  not like we can stop the user from popping
 620                 // the media out of the device (no locking doors, etc)
 621                 //
 622                 return USB_STOR_TRANSPORT_GOOD;
 623         }
 624
 625         if (srb->cmnd[0] == START_STOP) {
 626                 /* this is used by sd.c'check_scsidisk_media_change to detect
 627                    media change */
 628                 usb_stor_dbg(us, "START_STOP\n");
 629                 /* the first jumpshot_id_device after a media change returns
 630                    an error (determined experimentally) */
 631                 rc = jumpshot_id_device(us, info);
 632                 if (rc == USB_STOR_TRANSPORT_GOOD) {
 633                         info->sense_key = NO_SENSE;
 634                         srb->result = SUCCESS;
 635                 } else {
 636                         info->sense_key = UNIT_ATTENTION;
 637                         srb->result = SAM_STAT_CHECK_CONDITION;
 638                 }
 639                 return rc;
 640         }
 641
 642         usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
 643                      srb->cmnd[0], srb->cmnd[0]);
 644         info->sense_key = 0x05;
 645         info->sense_asc = 0x20;
 646         info->sense_ascq = 0x00;
 647         return USB_STOR_TRANSPORT_FAILED;
 648 }
 649
 650 static int jumpshot_probe(struct usb_interface *intf,
 651                          const struct usb_device_id *id)
 652 {
 653         struct us_data *us;
 654         int result;
 655
 656         result = usb_stor_probe1(&us, intf, id,
 657                         (id - jumpshot_usb_ids) + jumpshot_unusual_dev_list);
 658         if (result)
 659                 return result;
 660
 661         us->transport_name  = "Lexar Jumpshot Control/Bulk";
 662         us->transport = jumpshot_transport;
 663         us->transport_reset = usb_stor_Bulk_reset;
 664         us->max_lun = 1;
 665
 666         result = usb_stor_probe2(us);
 667         return result;
 668 }
 669
 670 static struct usb_driver jumpshot_driver = {
 671         .name =         "ums-jumpshot",
 672         .probe =        jumpshot_probe,
 673         .disconnect =   usb_stor_disconnect,
 674         .suspend =      usb_stor_suspend,
 675         .resume =       usb_stor_resume,
 676         .reset_resume = usb_stor_reset_resume,
 677         .pre_reset =    usb_stor_pre_reset,
 678         .post_reset =   usb_stor_post_reset,
 679         .id_table =     jumpshot_usb_ids,
 680         .soft_unbind =  1,
 681         .no_dynamic_id = 1,
 682 };
 683
 684 module_usb_driver(jumpshot_driver);