1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for Datafab USB Compact Flash reader 4 * 5 * datafab driver v0.1: 6 * 7 * First release 8 * 9 * Current development and maintenance by: 10 * (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org) 11 * 12 * Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver 13 * which I used as a template for this driver. 14 * 15 * Some bugfixes and scatter-gather code by Gregory P. Smith 16 * (greg-usb@electricrain.com) 17 * 18 * Fix for media change by Joerg Schneider (js@joergschneider.com) 19 * 20 * Other contributors: 21 * (c) 2002 Alan Stern <stern@rowland.org> 22 */ 23 24 /* 25 * This driver attempts to support USB CompactFlash reader/writer devices 26 * based on Datafab USB-to-ATA chips. It was specifically developed for the 27 * Datafab MDCFE-B USB CompactFlash reader but has since been found to work 28 * with a variety of Datafab-based devices from a number of manufacturers. 29 * I've received a report of this driver working with a Datafab-based 30 * SmartMedia device though please be aware that I'm personally unable to 31 * test SmartMedia support. 32 * 33 * This driver supports reading and writing. If you're truly paranoid, 34 * however, you can force the driver into a write-protected state by setting 35 * the WP enable bits in datafab_handle_mode_sense(). See the comments 36 * in that routine. 37 */ 38 39 #include <linux/errno.h> 40 #include <linux/module.h> 41 #include <linux/slab.h> 42 43 #include <scsi/scsi.h> 44 #include <scsi/scsi_cmnd.h> 45 46 #include "usb.h" 47 #include "transport.h" 48 #include "protocol.h" 49 #include "debug.h" 50 #include "scsiglue.h" 51 52 #define DRV_NAME "ums-datafab" 53 54 MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader"); 55 MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>"); 56 MODULE_LICENSE("GPL"); 57 58 struct datafab_info { 59 unsigned long sectors; /* total sector count */ 60 unsigned long ssize; /* sector size in bytes */ 61 signed char lun; /* used for dual-slot readers */ 62 63 /* the following aren't used yet */ 64 unsigned char sense_key; 65 unsigned long sense_asc; /* additional sense code */ 66 unsigned long sense_ascq; /* additional sense code qualifier */ 67 }; 68 69 static int datafab_determine_lun(struct us_data *us, 70 struct datafab_info *info); 71 72 73 /* 74 * The table of devices 75 */ 76 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ 77 vendorName, productName, useProtocol, useTransport, \ 78 initFunction, flags) \ 79 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ 80 .driver_info = (flags) } 81 82 static struct usb_device_id datafab_usb_ids[] = { 83 # include "unusual_datafab.h" 84 { } /* Terminating entry */ 85 }; 86 MODULE_DEVICE_TABLE(usb, datafab_usb_ids); 87 88 #undef UNUSUAL_DEV 89 90 /* 91 * The flags table 92 */ 93 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ 94 vendor_name, product_name, use_protocol, use_transport, \ 95 init_function, Flags) \ 96 { \ 97 .vendorName = vendor_name, \ 98 .productName = product_name, \ 99 .useProtocol = use_protocol, \ 100 .useTransport = use_transport, \ 101 .initFunction = init_function, \ 102 } 103 104 static struct us_unusual_dev datafab_unusual_dev_list[] = { 105 # include "unusual_datafab.h" 106 { } /* Terminating entry */ 107 }; 108 109 #undef UNUSUAL_DEV 110 111 112 static inline int 113 datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) { 114 if (len == 0) 115 return USB_STOR_XFER_GOOD; 116 117 usb_stor_dbg(us, "len = %d\n", len); 118 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, 119 data, len, NULL); 120 } 121 122 123 static inline int 124 datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) { 125 if (len == 0) 126 return USB_STOR_XFER_GOOD; 127 128 usb_stor_dbg(us, "len = %d\n", len); 129 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, 130 data, len, NULL); 131 } 132 133 134 static int datafab_read_data(struct us_data *us, 135 struct datafab_info *info, 136 u32 sector, 137 u32 sectors) 138 { 139 unsigned char *command = us->iobuf; 140 unsigned char *buffer; 141 unsigned char thistime; 142 unsigned int totallen, alloclen; 143 int len, result; 144 unsigned int sg_offset = 0; 145 struct scatterlist *sg = NULL; 146 147 // we're working in LBA mode. according to the ATA spec, 148 // we can support up to 28-bit addressing. I don't know if Datafab 149 // supports beyond 24-bit addressing. It's kind of hard to test 150 // since it requires > 8GB CF card. 151 // 152 if (sectors > 0x0FFFFFFF) 153 return USB_STOR_TRANSPORT_ERROR; 154 155 if (info->lun == -1) { 156 result = datafab_determine_lun(us, info); 157 if (result != USB_STOR_TRANSPORT_GOOD) 158 return result; 159 } 160 161 totallen = sectors * info->ssize; 162 163 // Since we don't read more than 64 KB at a time, we have to create 164 // a bounce buffer and move the data a piece at a time between the 165 // bounce buffer and the actual transfer buffer. 166 167 alloclen = min(totallen, 65536u); 168 buffer = kmalloc(alloclen, GFP_NOIO); 169 if (buffer == NULL) 170 return USB_STOR_TRANSPORT_ERROR; 171 172 do { 173 // loop, never allocate or transfer more than 64k at once 174 // (min(128k, 255*info->ssize) is the real limit) 175 176 len = min(totallen, alloclen); 177 thistime = (len / info->ssize) & 0xff; 178 179 command[0] = 0; 180 command[1] = thistime; 181 command[2] = sector & 0xFF; 182 command[3] = (sector >> 8) & 0xFF; 183 command[4] = (sector >> 16) & 0xFF; 184 185 command[5] = 0xE0 + (info->lun << 4); 186 command[5] |= (sector >> 24) & 0x0F; 187 command[6] = 0x20; 188 command[7] = 0x01; 189 190 // send the read command 191 result = datafab_bulk_write(us, command, 8); 192 if (result != USB_STOR_XFER_GOOD) 193 goto leave; 194 195 // read the result 196 result = datafab_bulk_read(us, buffer, len); 197 if (result != USB_STOR_XFER_GOOD) 198 goto leave; 199 200 // Store the data in the transfer buffer 201 usb_stor_access_xfer_buf(buffer, len, us->srb, 202 &sg, &sg_offset, TO_XFER_BUF); 203 204 sector += thistime; 205 totallen -= len; 206 } while (totallen > 0); 207 208 kfree(buffer); 209 return USB_STOR_TRANSPORT_GOOD; 210 211 leave: 212 kfree(buffer); 213 return USB_STOR_TRANSPORT_ERROR; 214 } 215 216 217 static int datafab_write_data(struct us_data *us, 218 struct datafab_info *info, 219 u32 sector, 220 u32 sectors) 221 { 222 unsigned char *command = us->iobuf; 223 unsigned char *reply = us->iobuf; 224 unsigned char *buffer; 225 unsigned char thistime; 226 unsigned int totallen, alloclen; 227 int len, result; 228 unsigned int sg_offset = 0; 229 struct scatterlist *sg = NULL; 230 231 // we're working in LBA mode. according to the ATA spec, 232 // we can support up to 28-bit addressing. I don't know if Datafab 233 // supports beyond 24-bit addressing. It's kind of hard to test 234 // since it requires > 8GB CF card. 235 // 236 if (sectors > 0x0FFFFFFF) 237 return USB_STOR_TRANSPORT_ERROR; 238 239 if (info->lun == -1) { 240 result = datafab_determine_lun(us, info); 241 if (result != USB_STOR_TRANSPORT_GOOD) 242 return result; 243 } 244 245 totallen = sectors * info->ssize; 246 247 // Since we don't write more than 64 KB at a time, we have to create 248 // a bounce buffer and move the data a piece at a time between the 249 // bounce buffer and the actual transfer buffer. 250 251 alloclen = min(totallen, 65536u); 252 buffer = kmalloc(alloclen, GFP_NOIO); 253 if (buffer == NULL) 254 return USB_STOR_TRANSPORT_ERROR; 255 256 do { 257 // loop, never allocate or transfer more than 64k at once 258 // (min(128k, 255*info->ssize) is the real limit) 259 260 len = min(totallen, alloclen); 261 thistime = (len / info->ssize) & 0xff; 262 263 // Get the data from the transfer buffer 264 usb_stor_access_xfer_buf(buffer, len, us->srb, 265 &sg, &sg_offset, FROM_XFER_BUF); 266 267 command[0] = 0; 268 command[1] = thistime; 269 command[2] = sector & 0xFF; 270 command[3] = (sector >> 8) & 0xFF; 271 command[4] = (sector >> 16) & 0xFF; 272 273 command[5] = 0xE0 + (info->lun << 4); 274 command[5] |= (sector >> 24) & 0x0F; 275 command[6] = 0x30; 276 command[7] = 0x02; 277 278 // send the command 279 result = datafab_bulk_write(us, command, 8); 280 if (result != USB_STOR_XFER_GOOD) 281 goto leave; 282 283 // send the data 284 result = datafab_bulk_write(us, buffer, len); 285 if (result != USB_STOR_XFER_GOOD) 286 goto leave; 287 288 // read the result 289 result = datafab_bulk_read(us, reply, 2); 290 if (result != USB_STOR_XFER_GOOD) 291 goto leave; 292 293 if (reply[0] != 0x50 && reply[1] != 0) { 294 usb_stor_dbg(us, "Gah! write return code: %02x %02x\n", 295 reply[0], reply[1]); 296 result = USB_STOR_TRANSPORT_ERROR; 297 goto leave; 298 } 299 300 sector += thistime; 301 totallen -= len; 302 } while (totallen > 0); 303 304 kfree(buffer); 305 return USB_STOR_TRANSPORT_GOOD; 306 307 leave: 308 kfree(buffer); 309 return USB_STOR_TRANSPORT_ERROR; 310 } 311 312 313 static int datafab_determine_lun(struct us_data *us, 314 struct datafab_info *info) 315 { 316 // Dual-slot readers can be thought of as dual-LUN devices. 317 // We need to determine which card slot is being used. 318 // We'll send an IDENTIFY DEVICE command and see which LUN responds... 319 // 320 // There might be a better way of doing this? 321 322 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; 323 unsigned char *command = us->iobuf; 324 unsigned char *buf; 325 int count = 0, rc; 326 327 if (!info) 328 return USB_STOR_TRANSPORT_ERROR; 329 330 memcpy(command, scommand, 8); 331 buf = kmalloc(512, GFP_NOIO); 332 if (!buf) 333 return USB_STOR_TRANSPORT_ERROR; 334 335 usb_stor_dbg(us, "locating...\n"); 336 337 // we'll try 3 times before giving up... 338 // 339 while (count++ < 3) { 340 command[5] = 0xa0; 341 342 rc = datafab_bulk_write(us, command, 8); 343 if (rc != USB_STOR_XFER_GOOD) { 344 rc = USB_STOR_TRANSPORT_ERROR; 345 goto leave; 346 } 347 348 rc = datafab_bulk_read(us, buf, 512); 349 if (rc == USB_STOR_XFER_GOOD) { 350 info->lun = 0; 351 rc = USB_STOR_TRANSPORT_GOOD; 352 goto leave; 353 } 354 355 command[5] = 0xb0; 356 357 rc = datafab_bulk_write(us, command, 8); 358 if (rc != USB_STOR_XFER_GOOD) { 359 rc = USB_STOR_TRANSPORT_ERROR; 360 goto leave; 361 } 362 363 rc = datafab_bulk_read(us, buf, 512); 364 if (rc == USB_STOR_XFER_GOOD) { 365 info->lun = 1; 366 rc = USB_STOR_TRANSPORT_GOOD; 367 goto leave; 368 } 369 370 msleep(20); 371 } 372 373 rc = USB_STOR_TRANSPORT_ERROR; 374 375 leave: 376 kfree(buf); 377 return rc; 378 } 379 380 static int datafab_id_device(struct us_data *us, 381 struct datafab_info *info) 382 { 383 // this is a variation of the ATA "IDENTIFY DEVICE" command...according 384 // to the ATA spec, 'Sector Count' isn't used but the Windows driver 385 // sets this bit so we do too... 386 // 387 static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 }; 388 unsigned char *command = us->iobuf; 389 unsigned char *reply; 390 int rc; 391 392 if (!info) 393 return USB_STOR_TRANSPORT_ERROR; 394 395 if (info->lun == -1) { 396 rc = datafab_determine_lun(us, info); 397 if (rc != USB_STOR_TRANSPORT_GOOD) 398 return rc; 399 } 400 401 memcpy(command, scommand, 8); 402 reply = kmalloc(512, GFP_NOIO); 403 if (!reply) 404 return USB_STOR_TRANSPORT_ERROR; 405 406 command[5] += (info->lun << 4); 407 408 rc = datafab_bulk_write(us, command, 8); 409 if (rc != USB_STOR_XFER_GOOD) { 410 rc = USB_STOR_TRANSPORT_ERROR; 411 goto leave; 412 } 413 414 // we'll go ahead and extract the media capacity while we're here... 415 // 416 rc = datafab_bulk_read(us, reply, 512); 417 if (rc == USB_STOR_XFER_GOOD) { 418 // capacity is at word offset 57-58 419 // 420 info->sectors = ((u32)(reply[117]) << 24) | 421 ((u32)(reply[116]) << 16) | 422 ((u32)(reply[115]) << 8) | 423 ((u32)(reply[114]) ); 424 rc = USB_STOR_TRANSPORT_GOOD; 425 goto leave; 426 } 427 428 rc = USB_STOR_TRANSPORT_ERROR; 429 430 leave: 431 kfree(reply); 432 return rc; 433 } 434 435 436 static int datafab_handle_mode_sense(struct us_data *us, 437 struct scsi_cmnd * srb, 438 int sense_6) 439 { 440 static unsigned char rw_err_page[12] = { 441 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0 442 }; 443 static unsigned char cache_page[12] = { 444 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0 445 }; 446 static unsigned char rbac_page[12] = { 447 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0 448 }; 449 static unsigned char timer_page[8] = { 450 0x1C, 0x6, 0, 0, 0, 0 451 }; 452 unsigned char pc, page_code; 453 unsigned int i = 0; 454 struct datafab_info *info = (struct datafab_info *) (us->extra); 455 unsigned char *ptr = us->iobuf; 456 457 // most of this stuff is just a hack to get things working. the 458 // datafab reader doesn't present a SCSI interface so we 459 // fudge the SCSI commands... 460 // 461 462 pc = srb->cmnd[2] >> 6; 463 page_code = srb->cmnd[2] & 0x3F; 464 465 switch (pc) { 466 case 0x0: 467 usb_stor_dbg(us, "Current values\n"); 468 break; 469 case 0x1: 470 usb_stor_dbg(us, "Changeable values\n"); 471 break; 472 case 0x2: 473 usb_stor_dbg(us, "Default values\n"); 474 break; 475 case 0x3: 476 usb_stor_dbg(us, "Saves values\n"); 477 break; 478 } 479 480 memset(ptr, 0, 8); 481 if (sense_6) { 482 ptr[2] = 0x00; // WP enable: 0x80 483 i = 4; 484 } else { 485 ptr[3] = 0x00; // WP enable: 0x80 486 i = 8; 487 } 488 489 switch (page_code) { 490 default: 491 // vendor-specific mode 492 info->sense_key = 0x05; 493 info->sense_asc = 0x24; 494 info->sense_ascq = 0x00; 495 return USB_STOR_TRANSPORT_FAILED; 496 497 case 0x1: 498 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); 499 i += sizeof(rw_err_page); 500 break; 501 502 case 0x8: 503 memcpy(ptr + i, cache_page, sizeof(cache_page)); 504 i += sizeof(cache_page); 505 break; 506 507 case 0x1B: 508 memcpy(ptr + i, rbac_page, sizeof(rbac_page)); 509 i += sizeof(rbac_page); 510 break; 511 512 case 0x1C: 513 memcpy(ptr + i, timer_page, sizeof(timer_page)); 514 i += sizeof(timer_page); 515 break; 516 517 case 0x3F: // retrieve all pages 518 memcpy(ptr + i, timer_page, sizeof(timer_page)); 519 i += sizeof(timer_page); 520 memcpy(ptr + i, rbac_page, sizeof(rbac_page)); 521 i += sizeof(rbac_page); 522 memcpy(ptr + i, cache_page, sizeof(cache_page)); 523 i += sizeof(cache_page); 524 memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); 525 i += sizeof(rw_err_page); 526 break; 527 } 528 529 if (sense_6) 530 ptr[0] = i - 1; 531 else 532 ((__be16 *) ptr)[0] = cpu_to_be16(i - 2); 533 usb_stor_set_xfer_buf(ptr, i, srb); 534 535 return USB_STOR_TRANSPORT_GOOD; 536 } 537 538 static void datafab_info_destructor(void *extra) 539 { 540 // this routine is a placeholder... 541 // currently, we don't allocate any extra memory so we're okay 542 } 543 544 545 // Transport for the Datafab MDCFE-B 546 // 547 static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us) 548 { 549 struct datafab_info *info; 550 int rc; 551 unsigned long block, blocks; 552 unsigned char *ptr = us->iobuf; 553 static unsigned char inquiry_reply[8] = { 554 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00 555 }; 556 557 if (!us->extra) { 558 us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO); 559 if (!us->extra) 560 return USB_STOR_TRANSPORT_ERROR; 561 562 us->extra_destructor = datafab_info_destructor; 563 ((struct datafab_info *)us->extra)->lun = -1; 564 } 565 566 info = (struct datafab_info *) (us->extra); 567 568 if (srb->cmnd[0] == INQUIRY) { 569 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n"); 570 memcpy(ptr, inquiry_reply, sizeof(inquiry_reply)); 571 fill_inquiry_response(us, ptr, 36); 572 return USB_STOR_TRANSPORT_GOOD; 573 } 574 575 if (srb->cmnd[0] == READ_CAPACITY) { 576 info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec 577 rc = datafab_id_device(us, info); 578 if (rc != USB_STOR_TRANSPORT_GOOD) 579 return rc; 580 581 usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n", 582 info->sectors, info->ssize); 583 584 // build the reply 585 // we need the last sector, not the number of sectors 586 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1); 587 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize); 588 usb_stor_set_xfer_buf(ptr, 8, srb); 589 590 return USB_STOR_TRANSPORT_GOOD; 591 } 592 593 if (srb->cmnd[0] == MODE_SELECT_10) { 594 usb_stor_dbg(us, "Gah! MODE_SELECT_10\n"); 595 return USB_STOR_TRANSPORT_ERROR; 596 } 597 598 // don't bother implementing READ_6 or WRITE_6. 599 // 600 if (srb->cmnd[0] == READ_10) { 601 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 602 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 603 604 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); 605 606 usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n", 607 block, blocks); 608 return datafab_read_data(us, info, block, blocks); 609 } 610 611 if (srb->cmnd[0] == READ_12) { 612 // we'll probably never see a READ_12 but we'll do it anyway... 613 // 614 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 615 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 616 617 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | 618 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); 619 620 usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n", 621 block, blocks); 622 return datafab_read_data(us, info, block, blocks); 623 } 624 625 if (srb->cmnd[0] == WRITE_10) { 626 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 627 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 628 629 blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); 630 631 usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n", 632 block, blocks); 633 return datafab_write_data(us, info, block, blocks); 634 } 635 636 if (srb->cmnd[0] == WRITE_12) { 637 // we'll probably never see a WRITE_12 but we'll do it anyway... 638 // 639 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | 640 ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); 641 642 blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | 643 ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); 644 645 usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n", 646 block, blocks); 647 return datafab_write_data(us, info, block, blocks); 648 } 649 650 if (srb->cmnd[0] == TEST_UNIT_READY) { 651 usb_stor_dbg(us, "TEST_UNIT_READY\n"); 652 return datafab_id_device(us, info); 653 } 654 655 if (srb->cmnd[0] == REQUEST_SENSE) { 656 usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n"); 657 658 // this response is pretty bogus right now. eventually if necessary 659 // we can set the correct sense data. so far though it hasn't been 660 // necessary 661 // 662 memset(ptr, 0, 18); 663 ptr[0] = 0xF0; 664 ptr[2] = info->sense_key; 665 ptr[7] = 11; 666 ptr[12] = info->sense_asc; 667 ptr[13] = info->sense_ascq; 668 usb_stor_set_xfer_buf(ptr, 18, srb); 669 670 return USB_STOR_TRANSPORT_GOOD; 671 } 672 673 if (srb->cmnd[0] == MODE_SENSE) { 674 usb_stor_dbg(us, "MODE_SENSE_6 detected\n"); 675 return datafab_handle_mode_sense(us, srb, 1); 676 } 677 678 if (srb->cmnd[0] == MODE_SENSE_10) { 679 usb_stor_dbg(us, "MODE_SENSE_10 detected\n"); 680 return datafab_handle_mode_sense(us, srb, 0); 681 } 682 683 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { 684 /* 685 * sure. whatever. not like we can stop the user from 686 * popping the media out of the device (no locking doors, etc) 687 */ 688 return USB_STOR_TRANSPORT_GOOD; 689 } 690 691 if (srb->cmnd[0] == START_STOP) { 692 /* 693 * this is used by sd.c'check_scsidisk_media_change to detect 694 * media change 695 */ 696 usb_stor_dbg(us, "START_STOP\n"); 697 /* 698 * the first datafab_id_device after a media change returns 699 * an error (determined experimentally) 700 */ 701 rc = datafab_id_device(us, info); 702 if (rc == USB_STOR_TRANSPORT_GOOD) { 703 info->sense_key = NO_SENSE; 704 srb->result = SUCCESS; 705 } else { 706 info->sense_key = UNIT_ATTENTION; 707 srb->result = SAM_STAT_CHECK_CONDITION; 708 } 709 return rc; 710 } 711 712 usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n", 713 srb->cmnd[0], srb->cmnd[0]); 714 info->sense_key = 0x05; 715 info->sense_asc = 0x20; 716 info->sense_ascq = 0x00; 717 return USB_STOR_TRANSPORT_FAILED; 718 } 719 720 static struct scsi_host_template datafab_host_template; 721 722 static int datafab_probe(struct usb_interface *intf, 723 const struct usb_device_id *id) 724 { 725 struct us_data *us; 726 int result; 727 728 result = usb_stor_probe1(&us, intf, id, 729 (id - datafab_usb_ids) + datafab_unusual_dev_list, 730 &datafab_host_template); 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 = DRV_NAME, 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 .no_dynamic_id = 1, 755 }; 756 757 module_usb_stor_driver(datafab_driver, datafab_host_template, DRV_NAME); 758