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)|(USB_US_TYPE_STOR<<24) } 90 91 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 US_DEBUGP("datafab_bulk_read: 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 US_DEBUGP("datafab_bulk_write: 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 US_DEBUGP("datafab_write_data: Gah! " 304 "write return code: %02x %02x\n", 305 reply[0], reply[1]); 306 result = USB_STOR_TRANSPORT_ERROR; 307 goto leave; 308 } 309 310 sector += thistime; 311 totallen -= len; 312 } while (totallen > 0); 313 314 kfree(buffer); 315 return USB_STOR_TRANSPORT_GOOD; 316 317 leave: 318 kfree(buffer); 319 return USB_STOR_TRANSPORT_ERROR; 320 } 321 322 323 static int datafab_determine_lun(struct us_data *us, 324 struct datafab_info *info) 325 { 326 // Dual-slot readers can be thought of as dual-LUN devices. 327 // We need to determine which card slot is being used. 328 // We'll send an IDENTIFY DEVICE command and see which LUN responds... 329 // 330 // There might be a better way of doing this? 331 332 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; 333 unsigned char *command = us->iobuf; 334 unsigned char *buf; 335 int count = 0, rc; 336 337 if (!info) 338 return USB_STOR_TRANSPORT_ERROR; 339 340 memcpy(command, scommand, 8); 341 buf = kmalloc(512, GFP_NOIO); 342 if (!buf) 343 return USB_STOR_TRANSPORT_ERROR; 344 345 US_DEBUGP("datafab_determine_lun: locating...\n"); 346 347 // we'll try 3 times before giving up... 348 // 349 while (count++ < 3) { 350 command[5] = 0xa0; 351 352 rc = datafab_bulk_write(us, command, 8); 353 if (rc != USB_STOR_XFER_GOOD) { 354 rc = USB_STOR_TRANSPORT_ERROR; 355 goto leave; 356 } 357 358 rc = datafab_bulk_read(us, buf, 512); 359 if (rc == USB_STOR_XFER_GOOD) { 360 info->lun = 0; 361 rc = USB_STOR_TRANSPORT_GOOD; 362 goto leave; 363 } 364 365 command[5] = 0xb0; 366 367 rc = datafab_bulk_write(us, command, 8); 368 if (rc != USB_STOR_XFER_GOOD) { 369 rc = USB_STOR_TRANSPORT_ERROR; 370 goto leave; 371 } 372 373 rc = datafab_bulk_read(us, buf, 512); 374 if (rc == USB_STOR_XFER_GOOD) { 375 info->lun = 1; 376 rc = USB_STOR_TRANSPORT_GOOD; 377 goto leave; 378 } 379 380 msleep(20); 381 } 382 383 rc = USB_STOR_TRANSPORT_ERROR; 384 385 leave: 386 kfree(buf); 387 return rc; 388 } 389 390 static int datafab_id_device(struct us_data *us, 391 struct datafab_info *info) 392 { 393 // this is a variation of the ATA "IDENTIFY DEVICE" command...according 394 // to the ATA spec, 'Sector Count' isn't used but the Windows driver 395 // sets this bit so we do too... 396 // 397 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; 398 unsigned char *command = us->iobuf; 399 unsigned char *reply; 400 int rc; 401 402 if (!info) 403 return USB_STOR_TRANSPORT_ERROR; 404 405 if (info->lun == -1) { 406 rc = datafab_determine_lun(us, info); 407 if (rc != USB_STOR_TRANSPORT_GOOD) 408 return rc; 409 } 410 411 memcpy(command, scommand, 8); 412 reply = kmalloc(512, GFP_NOIO); 413 if (!reply) 414 return USB_STOR_TRANSPORT_ERROR; 415 416 command[5] += (info->lun << 4); 417 418 rc = datafab_bulk_write(us, command, 8); 419 if (rc != USB_STOR_XFER_GOOD) { 420 rc = USB_STOR_TRANSPORT_ERROR; 421 goto leave; 422 } 423 424 // we'll go ahead and extract the media capacity while we're here... 425 // 426 rc = datafab_bulk_read(us, reply, 512); 427 if (rc == USB_STOR_XFER_GOOD) { 428 // capacity is at word offset 57-58 429 // 430 info->sectors = ((u32)(reply[117]) << 24) | 431 ((u32)(reply[116]) << 16) | 432 ((u32)(reply[115]) << 8) | 433 ((u32)(reply[114]) ); 434 rc = USB_STOR_TRANSPORT_GOOD; 435 goto leave; 436 } 437 438 rc = USB_STOR_TRANSPORT_ERROR; 439 440 leave: 441 kfree(reply); 442 return rc; 443 } 444 445 446 static int datafab_handle_mode_sense(struct us_data *us, 447 struct scsi_cmnd * srb, 448 int sense_6) 449 { 450 static unsigned char rw_err_page[12] = { 451 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0 452 }; 453 static unsigned char cache_page[12] = { 454 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0 455 }; 456 static unsigned char rbac_page[12] = { 457 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0 458 }; 459 static unsigned char timer_page[8] = { 460 0x1C, 0x6, 0, 0, 0, 0 461 }; 462 unsigned char pc, page_code; 463 unsigned int i = 0; 464 struct datafab_info *info = (struct datafab_info *) (us->extra); 465 unsigned char *ptr = us->iobuf; 466 467 // most of this stuff is just a hack to get things working. the 468 // datafab reader doesn't present a SCSI interface so we 469 // fudge the SCSI commands... 470 // 471 472 pc = srb->cmnd[2] >> 6; 473 page_code = srb->cmnd[2] & 0x3F; 474 475 switch (pc) { 476 case 0x0: 477 US_DEBUGP("datafab_handle_mode_sense: Current values\n"); 478 break; 479 case 0x1: 480 US_DEBUGP("datafab_handle_mode_sense: Changeable values\n"); 481 break; 482 case 0x2: 483 US_DEBUGP("datafab_handle_mode_sense: Default values\n"); 484 break; 485 case 0x3: 486 US_DEBUGP("datafab_handle_mode_sense: Saves values\n"); 487 break; 488 } 489 490 memset(ptr, 0, 8); 491 if (sense_6) { 492 ptr[2] = 0x00; // WP enable: 0x80 493 i = 4; 494 } else { 495 ptr[3] = 0x00; // WP enable: 0x80 496 i = 8; 497 } 498 499 switch (page_code) { 500 default: 501 // vendor-specific mode 502 info->sense_key = 0x05; 503 info->sense_asc = 0x24; 504 info->sense_ascq = 0x00; 505 return USB_STOR_TRANSPORT_FAILED; 506 507 case 0x1: 508 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); 509 i += sizeof(rw_err_page); 510 break; 511 512 case 0x8: 513 memcpy(ptr + i, cache_page, sizeof(cache_page)); 514 i += sizeof(cache_page); 515 break; 516 517 case 0x1B: 518 memcpy(ptr + i, rbac_page, sizeof(rbac_page)); 519 i += sizeof(rbac_page); 520 break; 521 522 case 0x1C: 523 memcpy(ptr + i, timer_page, sizeof(timer_page)); 524 i += sizeof(timer_page); 525 break; 526 527 case 0x3F: // retrieve all pages 528 memcpy(ptr + i, timer_page, sizeof(timer_page)); 529 i += sizeof(timer_page); 530 memcpy(ptr + i, rbac_page, sizeof(rbac_page)); 531 i += sizeof(rbac_page); 532 memcpy(ptr + i, cache_page, sizeof(cache_page)); 533 i += sizeof(cache_page); 534 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); 535 i += sizeof(rw_err_page); 536 break; 537 } 538 539 if (sense_6) 540 ptr[0] = i - 1; 541 else 542 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2); 543 usb_stor_set_xfer_buf(ptr, i, srb); 544 545 return USB_STOR_TRANSPORT_GOOD; 546 } 547 548 static void datafab_info_destructor(void *extra) 549 { 550 // this routine is a placeholder... 551 // currently, we don't allocate any extra memory so we're okay 552 } 553 554 555 // Transport for the Datafab MDCFE-B 556 // 557 static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us) 558 { 559 struct datafab_info *info; 560 int rc; 561 unsigned long block, blocks; 562 unsigned char *ptr = us->iobuf; 563 static unsigned char inquiry_reply[8] = { 564 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00 565 }; 566 567 if (!us->extra) { 568 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO); 569 if (!us->extra) { 570 US_DEBUGP("datafab_transport: Gah! " 571 "Can't allocate storage for Datafab info struct!\n"); 572 return USB_STOR_TRANSPORT_ERROR; 573 } 574 us->extra_destructor = datafab_info_destructor; 575 ((struct datafab_info *)us->extra)->lun = -1; 576 } 577 578 info = (struct datafab_info *) (us->extra); 579 580 if (srb->cmnd[0] == INQUIRY) { 581 US_DEBUGP("datafab_transport: INQUIRY. Returning bogus response"); 582 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply)); 583 fill_inquiry_response(us, ptr, 36); 584 return USB_STOR_TRANSPORT_GOOD; 585 } 586 587 if (srb->cmnd[0] == READ_CAPACITY) { 588 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec 589 rc = datafab_id_device(us, info); 590 if (rc != USB_STOR_TRANSPORT_GOOD) 591 return rc; 592 593 US_DEBUGP("datafab_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n", 594 info->sectors, info->ssize); 595 596 // build the reply 597 // we need the last sector, not the number of sectors 598 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1); 599 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize); 600 usb_stor_set_xfer_buf(ptr, 8, srb); 601 602 return USB_STOR_TRANSPORT_GOOD; 603 } 604 605 if (srb->cmnd[0] == MODE_SELECT_10) { 606 US_DEBUGP("datafab_transport: Gah! MODE_SELECT_10.\n"); 607 return USB_STOR_TRANSPORT_ERROR; 608 } 609 610 // don't bother implementing READ_6 or WRITE_6. 611 // 612 if (srb->cmnd[0] == READ_10) { 613 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 614 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 615 616 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); 617 618 US_DEBUGP("datafab_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks); 619 return datafab_read_data(us, info, block, blocks); 620 } 621 622 if (srb->cmnd[0] == READ_12) { 623 // we'll probably never see a READ_12 but we'll do it anyway... 624 // 625 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 626 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 627 628 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | 629 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); 630 631 US_DEBUGP("datafab_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks); 632 return datafab_read_data(us, info, block, blocks); 633 } 634 635 if (srb->cmnd[0] == WRITE_10) { 636 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 637 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 638 639 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); 640 641 US_DEBUGP("datafab_transport: WRITE_10: write block 0x%04lx count %ld\n", 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 US_DEBUGP("datafab_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks); 655 return datafab_write_data(us, info, block, blocks); 656 } 657 658 if (srb->cmnd[0] == TEST_UNIT_READY) { 659 US_DEBUGP("datafab_transport: TEST_UNIT_READY.\n"); 660 return datafab_id_device(us, info); 661 } 662 663 if (srb->cmnd[0] == REQUEST_SENSE) { 664 US_DEBUGP("datafab_transport: REQUEST_SENSE. Returning faked response\n"); 665 666 // this response is pretty bogus right now. eventually if necessary 667 // we can set the correct sense data. so far though it hasn't been 668 // necessary 669 // 670 memset(ptr, 0, 18); 671 ptr[0] = 0xF0; 672 ptr[2] = info->sense_key; 673 ptr[7] = 11; 674 ptr[12] = info->sense_asc; 675 ptr[13] = info->sense_ascq; 676 usb_stor_set_xfer_buf(ptr, 18, srb); 677 678 return USB_STOR_TRANSPORT_GOOD; 679 } 680 681 if (srb->cmnd[0] == MODE_SENSE) { 682 US_DEBUGP("datafab_transport: MODE_SENSE_6 detected\n"); 683 return datafab_handle_mode_sense(us, srb, 1); 684 } 685 686 if (srb->cmnd[0] == MODE_SENSE_10) { 687 US_DEBUGP("datafab_transport: MODE_SENSE_10 detected\n"); 688 return datafab_handle_mode_sense(us, srb, 0); 689 } 690 691 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { 692 // sure. whatever. not like we can stop the user from 693 // popping the media out of the device (no locking doors, etc) 694 // 695 return USB_STOR_TRANSPORT_GOOD; 696 } 697 698 if (srb->cmnd[0] == START_STOP) { 699 /* this is used by sd.c'check_scsidisk_media_change to detect 700 media change */ 701 US_DEBUGP("datafab_transport: START_STOP.\n"); 702 /* the first datafab_id_device after a media change returns 703 an error (determined experimentally) */ 704 rc = datafab_id_device(us, info); 705 if (rc == USB_STOR_TRANSPORT_GOOD) { 706 info->sense_key = NO_SENSE; 707 srb->result = SUCCESS; 708 } else { 709 info->sense_key = UNIT_ATTENTION; 710 srb->result = SAM_STAT_CHECK_CONDITION; 711 } 712 return rc; 713 } 714 715 US_DEBUGP("datafab_transport: Gah! Unknown command: %d (0x%x)\n", 716 srb->cmnd[0], srb->cmnd[0]); 717 info->sense_key = 0x05; 718 info->sense_asc = 0x20; 719 info->sense_ascq = 0x00; 720 return USB_STOR_TRANSPORT_FAILED; 721 } 722 723 static int datafab_probe(struct usb_interface *intf, 724 const struct usb_device_id *id) 725 { 726 struct us_data *us; 727 int result; 728 729 result = usb_stor_probe1(&us, intf, id, 730 (id - datafab_usb_ids) + datafab_unusual_dev_list); 731 if (result) 732 return result; 733 734 us->transport_name = "Datafab Bulk-Only"; 735 us->transport = datafab_transport; 736 us->transport_reset = usb_stor_Bulk_reset; 737 us->max_lun = 1; 738 739 result = usb_stor_probe2(us); 740 return result; 741 } 742 743 static struct usb_driver datafab_driver = { 744 .name = "ums-datafab", 745 .probe = datafab_probe, 746 .disconnect = usb_stor_disconnect, 747 .suspend = usb_stor_suspend, 748 .resume = usb_stor_resume, 749 .reset_resume = usb_stor_reset_resume, 750 .pre_reset = usb_stor_pre_reset, 751 .post_reset = usb_stor_post_reset, 752 .id_table = datafab_usb_ids, 753 .soft_unbind = 1, 754 }; 755 756 static int __init datafab_init(void) 757 { 758 return usb_register(&datafab_driver); 759 } 760 761 static void __exit datafab_exit(void) 762 { 763 usb_deregister(&datafab_driver); 764 } 765 766 module_init(datafab_init); 767 module_exit(datafab_exit); 768