drivers/usb/storage/datafab.c

   1 /* Driver for Datafab USB Compact Flash reader
   2  *
   3  * datafab driver v0.1:
   4  *
   5  * First release
   6  *
   7  * Current development and maintenance by:
   8  *   (c) 2000 Jimmie Mayfield (mayfield+datafab@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  * Other contributors:
  19  *   (c) 2002 Alan Stern <stern@rowland.org>
  20  *
  21  * This program is free software; you can redistribute it and/or modify it
  22  * under the terms of the GNU General Public License as published by the
  23  * Free Software Foundation; either version 2, or (at your option) any
  24  * later version.
  25  *
  26  * This program is distributed in the hope that it will be useful, but
  27  * WITHOUT ANY WARRANTY; without even the implied warranty of
  28  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  29  * General Public License for more details.
  30  *
  31  * You should have received a copy of the GNU General Public License along
  32  * with this program; if not, write to the Free Software Foundation, Inc.,
  33  * 675 Mass Ave, Cambridge, MA 02139, USA.
  34  */
  35
  36 /*
  37  * This driver attempts to support USB CompactFlash reader/writer devices
  38  * based on Datafab USB-to-ATA chips.  It was specifically developed for the
  39  * Datafab MDCFE-B USB CompactFlash reader but has since been found to work
  40  * with a variety of Datafab-based devices from a number of manufacturers.
  41  * I've received a report of this driver working with a Datafab-based
  42  * SmartMedia device though please be aware that I'm personally unable to
  43  * test SmartMedia support.
  44  *
  45  * This driver supports reading and writing.  If you're truly paranoid,
  46  * however, you can force the driver into a write-protected state by setting
  47  * the WP enable bits in datafab_handle_mode_sense().  See the comments
  48  * in that routine.
  49  */
  50
  51 #include <linux/errno.h>
  52 #include <linux/module.h>
  53 #include <linux/slab.h>
  54
  55 #include <scsi/scsi.h>
  56 #include <scsi/scsi_cmnd.h>
  57
  58 #include "usb.h"
  59 #include "transport.h"
  60 #include "protocol.h"
  61 #include "debug.h"
  62
  63 MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
  64 MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
  65 MODULE_LICENSE("GPL");
  66
  67 struct datafab_info {
  68         unsigned long   sectors;        /* total sector count */
  69         unsigned long   ssize;          /* sector size in bytes */
  70         signed char     lun;            /* used for dual-slot readers */
  71
  72         /* the following aren't used yet */
  73         unsigned char   sense_key;
  74         unsigned long   sense_asc;      /* additional sense code */
  75         unsigned long   sense_ascq;     /* additional sense code qualifier */
  76 };
  77
  78 static int datafab_determine_lun(struct us_data *us,
  79                                  struct datafab_info *info);
  80
  81
  82 /*
  83  * The table of devices
  84  */
  85 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
  86                     vendorName, productName, useProtocol, useTransport, \
  87                     initFunction, flags) \
  88 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  89   .driver_info = (flags) }
  90
  91 static struct usb_device_id datafab_usb_ids[] = {
  92 #       include "unusual_datafab.h"
  93         { }             /* Terminating entry */
  94 };
  95 MODULE_DEVICE_TABLE(usb, datafab_usb_ids);
  96
  97 #undef UNUSUAL_DEV
  98
  99 /*
 100  * The flags table
 101  */
 102 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
 103                     vendor_name, product_name, use_protocol, use_transport, \
 104                     init_function, Flags) \
 105 { \
 106         .vendorName = vendor_name,      \
 107         .productName = product_name,    \
 108         .useProtocol = use_protocol,    \
 109         .useTransport = use_transport,  \
 110         .initFunction = init_function,  \
 111 }
 112
 113 static struct us_unusual_dev datafab_unusual_dev_list[] = {
 114 #       include "unusual_datafab.h"
 115         { }             /* Terminating entry */
 116 };
 117
 118 #undef UNUSUAL_DEV
 119
 120
 121 static inline int
 122 datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
 123         if (len == 0)
 124                 return USB_STOR_XFER_GOOD;
 125
 126         usb_stor_dbg(us, "len = %d\n", len);
 127         return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
 128                         data, len, NULL);
 129 }
 130
 131
 132 static inline int
 133 datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
 134         if (len == 0)
 135                 return USB_STOR_XFER_GOOD;
 136
 137         usb_stor_dbg(us, "len = %d\n", len);
 138         return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
 139                         data, len, NULL);
 140 }
 141
 142
 143 static int datafab_read_data(struct us_data *us,
 144                              struct datafab_info *info,
 145                              u32 sector,
 146                              u32 sectors)
 147 {
 148         unsigned char *command = us->iobuf;
 149         unsigned char *buffer;
 150         unsigned char  thistime;
 151         unsigned int totallen, alloclen;
 152         int len, result;
 153         unsigned int sg_offset = 0;
 154         struct scatterlist *sg = NULL;
 155
 156         // we're working in LBA mode.  according to the ATA spec,
 157         // we can support up to 28-bit addressing.  I don't know if Datafab
 158         // supports beyond 24-bit addressing.  It's kind of hard to test
 159         // since it requires > 8GB CF card.
 160         //
 161         if (sectors > 0x0FFFFFFF)
 162                 return USB_STOR_TRANSPORT_ERROR;
 163
 164         if (info->lun == -1) {
 165                 result = datafab_determine_lun(us, info);
 166                 if (result != USB_STOR_TRANSPORT_GOOD)
 167                         return result;
 168         }
 169
 170         totallen = sectors * info->ssize;
 171
 172         // Since we don't read more than 64 KB at a time, we have to create
 173         // a bounce buffer and move the data a piece at a time between the
 174         // bounce buffer and the actual transfer buffer.
 175
 176         alloclen = min(totallen, 65536u);
 177         buffer = kmalloc(alloclen, GFP_NOIO);
 178         if (buffer == NULL)
 179                 return USB_STOR_TRANSPORT_ERROR;
 180
 181         do {
 182                 // loop, never allocate or transfer more than 64k at once
 183                 // (min(128k, 255*info->ssize) is the real limit)
 184
 185                 len = min(totallen, alloclen);
 186                 thistime = (len / info->ssize) & 0xff;
 187
 188                 command[0] = 0;
 189                 command[1] = thistime;
 190                 command[2] = sector & 0xFF;
 191                 command[3] = (sector >> 8) & 0xFF;
 192                 command[4] = (sector >> 16) & 0xFF;
 193
 194                 command[5] = 0xE0 + (info->lun << 4);
 195                 command[5] |= (sector >> 24) & 0x0F;
 196                 command[6] = 0x20;
 197                 command[7] = 0x01;
 198
 199                 // send the read command
 200                 result = datafab_bulk_write(us, command, 8);
 201                 if (result != USB_STOR_XFER_GOOD)
 202                         goto leave;
 203
 204                 // read the result
 205                 result = datafab_bulk_read(us, buffer, len);
 206                 if (result != USB_STOR_XFER_GOOD)
 207                         goto leave;
 208
 209                 // Store the data in the transfer buffer
 210                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 211                                  &sg, &sg_offset, TO_XFER_BUF);
 212
 213                 sector += thistime;
 214                 totallen -= len;
 215         } while (totallen > 0);
 216
 217         kfree(buffer);
 218         return USB_STOR_TRANSPORT_GOOD;
 219
 220  leave:
 221         kfree(buffer);
 222         return USB_STOR_TRANSPORT_ERROR;
 223 }
 224
 225
 226 static int datafab_write_data(struct us_data *us,
 227                               struct datafab_info *info,
 228                               u32 sector,
 229                               u32 sectors)
 230 {
 231         unsigned char *command = us->iobuf;
 232         unsigned char *reply = us->iobuf;
 233         unsigned char *buffer;
 234         unsigned char thistime;
 235         unsigned int totallen, alloclen;
 236         int len, result;
 237         unsigned int sg_offset = 0;
 238         struct scatterlist *sg = NULL;
 239
 240         // we're working in LBA mode.  according to the ATA spec,
 241         // we can support up to 28-bit addressing.  I don't know if Datafab
 242         // supports beyond 24-bit addressing.  It's kind of hard to test
 243         // since it requires > 8GB CF card.
 244         //
 245         if (sectors > 0x0FFFFFFF)
 246                 return USB_STOR_TRANSPORT_ERROR;
 247
 248         if (info->lun == -1) {
 249                 result = datafab_determine_lun(us, info);
 250                 if (result != USB_STOR_TRANSPORT_GOOD)
 251                         return result;
 252         }
 253
 254         totallen = sectors * info->ssize;
 255
 256         // Since we don't write more than 64 KB at a time, we have to create
 257         // a bounce buffer and move the data a piece at a time between the
 258         // bounce buffer and the actual transfer buffer.
 259
 260         alloclen = min(totallen, 65536u);
 261         buffer = kmalloc(alloclen, GFP_NOIO);
 262         if (buffer == NULL)
 263                 return USB_STOR_TRANSPORT_ERROR;
 264
 265         do {
 266                 // loop, never allocate or transfer more than 64k at once
 267                 // (min(128k, 255*info->ssize) is the real limit)
 268
 269                 len = min(totallen, alloclen);
 270                 thistime = (len / info->ssize) & 0xff;
 271
 272                 // Get the data from the transfer buffer
 273                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 274                                 &sg, &sg_offset, FROM_XFER_BUF);
 275
 276                 command[0] = 0;
 277                 command[1] = thistime;
 278                 command[2] = sector & 0xFF;
 279                 command[3] = (sector >> 8) & 0xFF;
 280                 command[4] = (sector >> 16) & 0xFF;
 281
 282                 command[5] = 0xE0 + (info->lun << 4);
 283                 command[5] |= (sector >> 24) & 0x0F;
 284                 command[6] = 0x30;
 285                 command[7] = 0x02;
 286
 287                 // send the command
 288                 result = datafab_bulk_write(us, command, 8);
 289                 if (result != USB_STOR_XFER_GOOD)
 290                         goto leave;
 291
 292                 // send the data
 293                 result = datafab_bulk_write(us, buffer, len);
 294                 if (result != USB_STOR_XFER_GOOD)
 295                         goto leave;
 296
 297                 // read the result
 298                 result = datafab_bulk_read(us, reply, 2);
 299                 if (result != USB_STOR_XFER_GOOD)
 300                         goto leave;
 301
 302                 if (reply[0] != 0x50 && reply[1] != 0) {
 303                         usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
 304                                      reply[0], reply[1]);
 305                         result = USB_STOR_TRANSPORT_ERROR;
 306                         goto leave;
 307                 }
 308
 309                 sector += thistime;
 310                 totallen -= len;
 311         } while (totallen > 0);
 312
 313         kfree(buffer);
 314         return USB_STOR_TRANSPORT_GOOD;
 315
 316  leave:
 317         kfree(buffer);
 318         return USB_STOR_TRANSPORT_ERROR;
 319 }
 320
 321
 322 static int datafab_determine_lun(struct us_data *us,
 323                                  struct datafab_info *info)
 324 {
 325         // Dual-slot readers can be thought of as dual-LUN devices.
 326         // We need to determine which card slot is being used.
 327         // We'll send an IDENTIFY DEVICE command and see which LUN responds...
 328         //
 329         // There might be a better way of doing this?
 330
 331         static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
 332         unsigned char *command = us->iobuf;
 333         unsigned char *buf;
 334         int count = 0, rc;
 335
 336         if (!info)
 337                 return USB_STOR_TRANSPORT_ERROR;
 338
 339         memcpy(command, scommand, 8);
 340         buf = kmalloc(512, GFP_NOIO);
 341         if (!buf)
 342                 return USB_STOR_TRANSPORT_ERROR;
 343
 344         usb_stor_dbg(us, "locating...\n");
 345
 346         // we'll try 3 times before giving up...
 347         //
 348         while (count++ < 3) {
 349                 command[5] = 0xa0;
 350
 351                 rc = datafab_bulk_write(us, command, 8);
 352                 if (rc != USB_STOR_XFER_GOOD) {
 353                         rc = USB_STOR_TRANSPORT_ERROR;
 354                         goto leave;
 355                 }
 356
 357                 rc = datafab_bulk_read(us, buf, 512);
 358                 if (rc == USB_STOR_XFER_GOOD) {
 359                         info->lun = 0;
 360                         rc = USB_STOR_TRANSPORT_GOOD;
 361                         goto leave;
 362                 }
 363
 364                 command[5] = 0xb0;
 365
 366                 rc = datafab_bulk_write(us, command, 8);
 367                 if (rc != USB_STOR_XFER_GOOD) {
 368                         rc = USB_STOR_TRANSPORT_ERROR;
 369                         goto leave;
 370                 }
 371
 372                 rc = datafab_bulk_read(us, buf, 512);
 373                 if (rc == USB_STOR_XFER_GOOD) {
 374                         info->lun = 1;
 375                         rc = USB_STOR_TRANSPORT_GOOD;
 376                         goto leave;
 377                 }
 378
 379                 msleep(20);
 380         }
 381
 382         rc = USB_STOR_TRANSPORT_ERROR;
 383
 384  leave:
 385         kfree(buf);
 386         return rc;
 387 }
 388
 389 static int datafab_id_device(struct us_data *us,
 390                              struct datafab_info *info)
 391 {
 392         // this is a variation of the ATA "IDENTIFY DEVICE" command...according
 393         // to the ATA spec, 'Sector Count' isn't used but the Windows driver
 394         // sets this bit so we do too...
 395         //
 396         static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
 397         unsigned char *command = us->iobuf;
 398         unsigned char *reply;
 399         int rc;
 400
 401         if (!info)
 402                 return USB_STOR_TRANSPORT_ERROR;
 403
 404         if (info->lun == -1) {
 405                 rc = datafab_determine_lun(us, info);
 406                 if (rc != USB_STOR_TRANSPORT_GOOD)
 407                         return rc;
 408         }
 409
 410         memcpy(command, scommand, 8);
 411         reply = kmalloc(512, GFP_NOIO);
 412         if (!reply)
 413                 return USB_STOR_TRANSPORT_ERROR;
 414
 415         command[5] += (info->lun << 4);
 416
 417         rc = datafab_bulk_write(us, command, 8);
 418         if (rc != USB_STOR_XFER_GOOD) {
 419                 rc = USB_STOR_TRANSPORT_ERROR;
 420                 goto leave;
 421         }
 422
 423         // we'll go ahead and extract the media capacity while we're here...
 424         //
 425         rc = datafab_bulk_read(us, reply, 512);
 426         if (rc == USB_STOR_XFER_GOOD) {
 427                 // capacity is at word offset 57-58
 428                 //
 429                 info->sectors = ((u32)(reply[117]) << 24) |
 430                                 ((u32)(reply[116]) << 16) |
 431                                 ((u32)(reply[115]) <<  8) |
 432                                 ((u32)(reply[114])      );
 433                 rc = USB_STOR_TRANSPORT_GOOD;
 434                 goto leave;
 435         }
 436
 437         rc = USB_STOR_TRANSPORT_ERROR;
 438
 439  leave:
 440         kfree(reply);
 441         return rc;
 442 }
 443
 444
 445 static int datafab_handle_mode_sense(struct us_data *us,
 446                                      struct scsi_cmnd * srb,
 447                                      int sense_6)
 448 {
 449         static unsigned char rw_err_page[12] = {
 450                 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
 451         };
 452         static unsigned char cache_page[12] = {
 453                 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
 454         };
 455         static unsigned char rbac_page[12] = {
 456                 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
 457         };
 458         static unsigned char timer_page[8] = {
 459                 0x1C, 0x6, 0, 0, 0, 0
 460         };
 461         unsigned char pc, page_code;
 462         unsigned int i = 0;
 463         struct datafab_info *info = (struct datafab_info *) (us->extra);
 464         unsigned char *ptr = us->iobuf;
 465
 466         // most of this stuff is just a hack to get things working.  the
 467         // datafab reader doesn't present a SCSI interface so we
 468         // fudge the SCSI commands...
 469         //
 470
 471         pc = srb->cmnd[2] >> 6;
 472         page_code = srb->cmnd[2] & 0x3F;
 473
 474         switch (pc) {
 475            case 0x0:
 476                    usb_stor_dbg(us, "Current values\n");
 477                 break;
 478            case 0x1:
 479                    usb_stor_dbg(us, "Changeable values\n");
 480                 break;
 481            case 0x2:
 482                    usb_stor_dbg(us, "Default values\n");
 483                 break;
 484            case 0x3:
 485                    usb_stor_dbg(us, "Saves values\n");
 486                 break;
 487         }
 488
 489         memset(ptr, 0, 8);
 490         if (sense_6) {
 491                 ptr[2] = 0x00;          // WP enable: 0x80
 492                 i = 4;
 493         } else {
 494                 ptr[3] = 0x00;          // WP enable: 0x80
 495                 i = 8;
 496         }
 497
 498         switch (page_code) {
 499            default:
 500                 // vendor-specific mode
 501                 info->sense_key = 0x05;
 502                 info->sense_asc = 0x24;
 503                 info->sense_ascq = 0x00;
 504                 return USB_STOR_TRANSPORT_FAILED;
 505
 506            case 0x1:
 507                 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
 508                 i += sizeof(rw_err_page);
 509                 break;
 510
 511            case 0x8:
 512                 memcpy(ptr + i, cache_page, sizeof(cache_page));
 513                 i += sizeof(cache_page);
 514                 break;
 515
 516            case 0x1B:
 517                 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
 518                 i += sizeof(rbac_page);
 519                 break;
 520
 521            case 0x1C:
 522                 memcpy(ptr + i, timer_page, sizeof(timer_page));
 523                 i += sizeof(timer_page);
 524                 break;
 525
 526            case 0x3F:           // retrieve all pages
 527                 memcpy(ptr + i, timer_page, sizeof(timer_page));
 528                 i += sizeof(timer_page);
 529                 memcpy(ptr + i, rbac_page, sizeof(rbac_page));
 530                 i += sizeof(rbac_page);
 531                 memcpy(ptr + i, cache_page, sizeof(cache_page));
 532                 i += sizeof(cache_page);
 533                 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
 534                 i += sizeof(rw_err_page);
 535                 break;
 536         }
 537
 538         if (sense_6)
 539                 ptr[0] = i - 1;
 540         else
 541                 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
 542         usb_stor_set_xfer_buf(ptr, i, srb);
 543
 544         return USB_STOR_TRANSPORT_GOOD;
 545 }
 546
 547 static void datafab_info_destructor(void *extra)
 548 {
 549         // this routine is a placeholder...
 550         // currently, we don't allocate any extra memory so we're okay
 551 }
 552
 553
 554 // Transport for the Datafab MDCFE-B
 555 //
 556 static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
 557 {
 558         struct datafab_info *info;
 559         int rc;
 560         unsigned long block, blocks;
 561         unsigned char *ptr = us->iobuf;
 562         static unsigned char inquiry_reply[8] = {
 563                 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
 564         };
 565
 566         if (!us->extra) {
 567                 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
 568                 if (!us->extra)
 569                         return USB_STOR_TRANSPORT_ERROR;
 570
 571                 us->extra_destructor = datafab_info_destructor;
 572                 ((struct datafab_info *)us->extra)->lun = -1;
 573         }
 574
 575         info = (struct datafab_info *) (us->extra);
 576
 577         if (srb->cmnd[0] == INQUIRY) {
 578                 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
 579                 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
 580                 fill_inquiry_response(us, ptr, 36);
 581                 return USB_STOR_TRANSPORT_GOOD;
 582         }
 583
 584         if (srb->cmnd[0] == READ_CAPACITY) {
 585                 info->ssize = 0x200;  // hard coded 512 byte sectors as per ATA spec
 586                 rc = datafab_id_device(us, info);
 587                 if (rc != USB_STOR_TRANSPORT_GOOD)
 588                         return rc;
 589
 590                 usb_stor_dbg(us, "READ_CAPACITY:  %ld sectors, %ld bytes per sector\n",
 591                              info->sectors, info->ssize);
 592
 593                 // build the reply
 594                 // we need the last sector, not the number of sectors
 595                 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
 596                 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
 597                 usb_stor_set_xfer_buf(ptr, 8, srb);
 598
 599                 return USB_STOR_TRANSPORT_GOOD;
 600         }
 601
 602         if (srb->cmnd[0] == MODE_SELECT_10) {
 603                 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
 604                 return USB_STOR_TRANSPORT_ERROR;
 605         }
 606
 607         // don't bother implementing READ_6 or WRITE_6.
 608         //
 609         if (srb->cmnd[0] == READ_10) {
 610                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 611                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 612
 613                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
 614
 615                 usb_stor_dbg(us, "READ_10: read block 0x%04lx  count %ld\n",
 616                              block, blocks);
 617                 return datafab_read_data(us, info, block, blocks);
 618         }
 619
 620         if (srb->cmnd[0] == READ_12) {
 621                 // we'll probably never see a READ_12 but we'll do it anyway...
 622                 //
 623                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 624                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 625
 626                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
 627                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
 628
 629                 usb_stor_dbg(us, "READ_12: read block 0x%04lx  count %ld\n",
 630                              block, blocks);
 631                 return datafab_read_data(us, info, block, blocks);
 632         }
 633
 634         if (srb->cmnd[0] == WRITE_10) {
 635                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 636                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 637
 638                 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
 639
 640                 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
 641                              block, blocks);
 642                 return datafab_write_data(us, info, block, blocks);
 643         }
 644
 645         if (srb->cmnd[0] == WRITE_12) {
 646                 // we'll probably never see a WRITE_12 but we'll do it anyway...
 647                 //
 648                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
 649                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 650
 651                 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
 652                          ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));
 653
 654                 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
 655                              block, blocks);
 656                 return datafab_write_data(us, info, block, blocks);
 657         }
 658
 659         if (srb->cmnd[0] == TEST_UNIT_READY) {
 660                 usb_stor_dbg(us, "TEST_UNIT_READY\n");
 661                 return datafab_id_device(us, info);
 662         }
 663
 664         if (srb->cmnd[0] == REQUEST_SENSE) {
 665                 usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
 666
 667                 // this response is pretty bogus right now.  eventually if necessary
 668                 // we can set the correct sense data.  so far though it hasn't been
 669                 // necessary
 670                 //
 671                 memset(ptr, 0, 18);
 672                 ptr[0] = 0xF0;
 673                 ptr[2] = info->sense_key;
 674                 ptr[7] = 11;
 675                 ptr[12] = info->sense_asc;
 676                 ptr[13] = info->sense_ascq;
 677                 usb_stor_set_xfer_buf(ptr, 18, srb);
 678
 679                 return USB_STOR_TRANSPORT_GOOD;
 680         }
 681
 682         if (srb->cmnd[0] == MODE_SENSE) {
 683                 usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
 684                 return datafab_handle_mode_sense(us, srb, 1);
 685         }
 686
 687         if (srb->cmnd[0] == MODE_SENSE_10) {
 688                 usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
 689                 return datafab_handle_mode_sense(us, srb, 0);
 690         }
 691
 692         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 693                 // sure.  whatever.  not like we can stop the user from
 694                 // popping the media out of the device (no locking doors, etc)
 695                 //
 696                 return USB_STOR_TRANSPORT_GOOD;
 697         }
 698
 699         if (srb->cmnd[0] == START_STOP) {
 700                 /* this is used by sd.c'check_scsidisk_media_change to detect
 701                    media change */
 702                 usb_stor_dbg(us, "START_STOP\n");
 703                 /* the first datafab_id_device after a media change returns
 704                    an error (determined experimentally) */
 705                 rc = datafab_id_device(us, info);
 706                 if (rc == USB_STOR_TRANSPORT_GOOD) {
 707                         info->sense_key = NO_SENSE;
 708                         srb->result = SUCCESS;
 709                 } else {
 710                         info->sense_key = UNIT_ATTENTION;
 711                         srb->result = SAM_STAT_CHECK_CONDITION;
 712                 }
 713                 return rc;
 714         }
 715
 716         usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
 717                      srb->cmnd[0], srb->cmnd[0]);
 718         info->sense_key = 0x05;
 719         info->sense_asc = 0x20;
 720         info->sense_ascq = 0x00;
 721         return USB_STOR_TRANSPORT_FAILED;
 722 }
 723
 724 static int datafab_probe(struct usb_interface *intf,
 725                          const struct usb_device_id *id)
 726 {
 727         struct us_data *us;
 728         int result;
 729
 730         result = usb_stor_probe1(&us, intf, id,
 731                         (id - datafab_usb_ids) + datafab_unusual_dev_list);
 732         if (result)
 733                 return result;
 734
 735         us->transport_name  = "Datafab Bulk-Only";
 736         us->transport = datafab_transport;
 737         us->transport_reset = usb_stor_Bulk_reset;
 738         us->max_lun = 1;
 739
 740         result = usb_stor_probe2(us);
 741         return result;
 742 }
 743
 744 static struct usb_driver datafab_driver = {
 745         .name =         "ums-datafab",
 746         .probe =        datafab_probe,
 747         .disconnect =   usb_stor_disconnect,
 748         .suspend =      usb_stor_suspend,
 749         .resume =       usb_stor_resume,
 750         .reset_resume = usb_stor_reset_resume,
 751         .pre_reset =    usb_stor_pre_reset,
 752         .post_reset =   usb_stor_post_reset,
 753         .id_table =     datafab_usb_ids,
 754         .soft_unbind =  1,
 755         .no_dynamic_id = 1,
 756 };
 757
 758 module_usb_driver(datafab_driver);