1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for SanDisk SDDR-55 SmartMedia reader 4 * 5 * SDDR55 driver v0.1: 6 * 7 * First release 8 * 9 * Current development and maintenance by: 10 * (c) 2002 Simon Munton 11 */ 12 13 #include <linux/jiffies.h> 14 #include <linux/errno.h> 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 18 #include <scsi/scsi.h> 19 #include <scsi/scsi_cmnd.h> 20 21 #include "usb.h" 22 #include "transport.h" 23 #include "protocol.h" 24 #include "debug.h" 25 #include "scsiglue.h" 26 27 #define DRV_NAME "ums-sddr55" 28 29 MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader"); 30 MODULE_AUTHOR("Simon Munton"); 31 MODULE_LICENSE("GPL"); 32 MODULE_IMPORT_NS("USB_STORAGE"); 33 34 /* 35 * The table of devices 36 */ 37 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ 38 vendorName, productName, useProtocol, useTransport, \ 39 initFunction, flags) \ 40 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ 41 .driver_info = (flags) } 42 43 static const struct usb_device_id sddr55_usb_ids[] = { 44 # include "unusual_sddr55.h" 45 { } /* Terminating entry */ 46 }; 47 MODULE_DEVICE_TABLE(usb, sddr55_usb_ids); 48 49 #undef UNUSUAL_DEV 50 51 /* 52 * The flags table 53 */ 54 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ 55 vendor_name, product_name, use_protocol, use_transport, \ 56 init_function, Flags) \ 57 { \ 58 .vendorName = vendor_name, \ 59 .productName = product_name, \ 60 .useProtocol = use_protocol, \ 61 .useTransport = use_transport, \ 62 .initFunction = init_function, \ 63 } 64 65 static const struct us_unusual_dev sddr55_unusual_dev_list[] = { 66 # include "unusual_sddr55.h" 67 { } /* Terminating entry */ 68 }; 69 70 #undef UNUSUAL_DEV 71 72 73 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) ) 74 #define LSB_of(s) ((s)&0xFF) 75 #define MSB_of(s) ((s)>>8) 76 #define PAGESIZE 512 77 78 #define set_sense_info(sk, asc, ascq) \ 79 do { \ 80 info->sense_data[2] = sk; \ 81 info->sense_data[12] = asc; \ 82 info->sense_data[13] = ascq; \ 83 } while (0) 84 85 86 struct sddr55_card_info { 87 unsigned long capacity; /* Size of card in bytes */ 88 int max_log_blks; /* maximum number of logical blocks */ 89 int pageshift; /* log2 of pagesize */ 90 int smallpageshift; /* 1 if pagesize == 256 */ 91 int blocksize; /* Size of block in pages */ 92 int blockshift; /* log2 of blocksize */ 93 int blockmask; /* 2^blockshift - 1 */ 94 int read_only; /* non zero if card is write protected */ 95 int force_read_only; /* non zero if we find a map error*/ 96 int *lba_to_pba; /* logical to physical map */ 97 int *pba_to_lba; /* physical to logical map */ 98 int fatal_error; /* set if we detect something nasty */ 99 unsigned long last_access; /* number of jiffies since we last talked to device */ 100 unsigned char sense_data[18]; 101 }; 102 103 104 #define NOT_ALLOCATED 0xffffffff 105 #define BAD_BLOCK 0xffff 106 #define CIS_BLOCK 0x400 107 #define UNUSED_BLOCK 0x3ff 108 109 static int 110 sddr55_bulk_transport(struct us_data *us, int direction, 111 unsigned char *data, unsigned int len) { 112 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 113 unsigned int pipe = (direction == DMA_FROM_DEVICE) ? 114 us->recv_bulk_pipe : us->send_bulk_pipe; 115 116 if (!len) 117 return USB_STOR_XFER_GOOD; 118 info->last_access = jiffies; 119 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL); 120 } 121 122 /* 123 * check if card inserted, if there is, update read_only status 124 * return non zero if no card 125 */ 126 127 static int sddr55_status(struct us_data *us) 128 { 129 int result; 130 unsigned char *command = us->iobuf; 131 unsigned char *status = us->iobuf; 132 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 133 134 /* send command */ 135 memset(command, 0, 8); 136 command[5] = 0xB0; 137 command[7] = 0x80; 138 result = sddr55_bulk_transport(us, 139 DMA_TO_DEVICE, command, 8); 140 141 usb_stor_dbg(us, "Result for send_command in status %d\n", result); 142 143 if (result != USB_STOR_XFER_GOOD) { 144 set_sense_info (4, 0, 0); /* hardware error */ 145 return USB_STOR_TRANSPORT_ERROR; 146 } 147 148 result = sddr55_bulk_transport(us, 149 DMA_FROM_DEVICE, status, 4); 150 151 /* expect to get short transfer if no card fitted */ 152 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) { 153 /* had a short transfer, no card inserted, free map memory */ 154 kfree(info->lba_to_pba); 155 kfree(info->pba_to_lba); 156 info->lba_to_pba = NULL; 157 info->pba_to_lba = NULL; 158 159 info->fatal_error = 0; 160 info->force_read_only = 0; 161 162 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */ 163 return USB_STOR_TRANSPORT_FAILED; 164 } 165 166 if (result != USB_STOR_XFER_GOOD) { 167 set_sense_info (4, 0, 0); /* hardware error */ 168 return USB_STOR_TRANSPORT_FAILED; 169 } 170 171 /* check write protect status */ 172 info->read_only = (status[0] & 0x20); 173 174 /* now read status */ 175 result = sddr55_bulk_transport(us, 176 DMA_FROM_DEVICE, status, 2); 177 178 if (result != USB_STOR_XFER_GOOD) { 179 set_sense_info (4, 0, 0); /* hardware error */ 180 } 181 182 return (result == USB_STOR_XFER_GOOD ? 183 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED); 184 } 185 186 187 static int sddr55_read_data(struct us_data *us, 188 unsigned int lba, 189 unsigned int page, 190 unsigned short sectors) { 191 192 int result = USB_STOR_TRANSPORT_GOOD; 193 unsigned char *command = us->iobuf; 194 unsigned char *status = us->iobuf; 195 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 196 unsigned char *buffer; 197 198 unsigned int pba; 199 unsigned int address; 200 201 unsigned short pages; 202 unsigned int len, offset; 203 struct scatterlist *sg; 204 205 // Since we only read in one block at a time, we have to create 206 // a bounce buffer and move the data a piece at a time between the 207 // bounce buffer and the actual transfer buffer. 208 209 len = min_t(unsigned int, sectors, info->blocksize >> 210 info->smallpageshift) * PAGESIZE; 211 buffer = kmalloc(len, GFP_NOIO); 212 if (buffer == NULL) 213 return USB_STOR_TRANSPORT_ERROR; /* out of memory */ 214 offset = 0; 215 sg = NULL; 216 217 while (sectors>0) { 218 219 /* have we got to end? */ 220 if (lba >= info->max_log_blks) 221 break; 222 223 pba = info->lba_to_pba[lba]; 224 225 // Read as many sectors as possible in this block 226 227 pages = min_t(unsigned int, sectors << info->smallpageshift, 228 info->blocksize - page); 229 len = pages << info->pageshift; 230 231 usb_stor_dbg(us, "Read %02X pages, from PBA %04X (LBA %04X) page %02X\n", 232 pages, pba, lba, page); 233 234 if (pba == NOT_ALLOCATED) { 235 /* no pba for this lba, fill with zeroes */ 236 memset (buffer, 0, len); 237 } else { 238 239 address = (pba << info->blockshift) + page; 240 241 command[0] = 0; 242 command[1] = LSB_of(address>>16); 243 command[2] = LSB_of(address>>8); 244 command[3] = LSB_of(address); 245 246 command[4] = 0; 247 command[5] = 0xB0; 248 command[6] = LSB_of(pages << (1 - info->smallpageshift)); 249 command[7] = 0x85; 250 251 /* send command */ 252 result = sddr55_bulk_transport(us, 253 DMA_TO_DEVICE, command, 8); 254 255 usb_stor_dbg(us, "Result for send_command in read_data %d\n", 256 result); 257 258 if (result != USB_STOR_XFER_GOOD) { 259 result = USB_STOR_TRANSPORT_ERROR; 260 goto leave; 261 } 262 263 /* read data */ 264 result = sddr55_bulk_transport(us, 265 DMA_FROM_DEVICE, buffer, len); 266 267 if (result != USB_STOR_XFER_GOOD) { 268 result = USB_STOR_TRANSPORT_ERROR; 269 goto leave; 270 } 271 272 /* now read status */ 273 result = sddr55_bulk_transport(us, 274 DMA_FROM_DEVICE, status, 2); 275 276 if (result != USB_STOR_XFER_GOOD) { 277 result = USB_STOR_TRANSPORT_ERROR; 278 goto leave; 279 } 280 281 /* check status for error */ 282 if (status[0] == 0xff && status[1] == 0x4) { 283 set_sense_info (3, 0x11, 0); 284 result = USB_STOR_TRANSPORT_FAILED; 285 goto leave; 286 } 287 } 288 289 // Store the data in the transfer buffer 290 usb_stor_access_xfer_buf(buffer, len, us->srb, 291 &sg, &offset, TO_XFER_BUF); 292 293 page = 0; 294 lba++; 295 sectors -= pages >> info->smallpageshift; 296 } 297 298 result = USB_STOR_TRANSPORT_GOOD; 299 300 leave: 301 kfree(buffer); 302 303 return result; 304 } 305 306 static int sddr55_write_data(struct us_data *us, 307 unsigned int lba, 308 unsigned int page, 309 unsigned short sectors) { 310 311 int result = USB_STOR_TRANSPORT_GOOD; 312 unsigned char *command = us->iobuf; 313 unsigned char *status = us->iobuf; 314 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 315 unsigned char *buffer; 316 317 unsigned int pba; 318 unsigned int new_pba; 319 unsigned int address; 320 321 unsigned short pages; 322 int i; 323 unsigned int len, offset; 324 struct scatterlist *sg; 325 326 /* check if we are allowed to write */ 327 if (info->read_only || info->force_read_only) { 328 set_sense_info (7, 0x27, 0); /* read only */ 329 return USB_STOR_TRANSPORT_FAILED; 330 } 331 332 // Since we only write one block at a time, we have to create 333 // a bounce buffer and move the data a piece at a time between the 334 // bounce buffer and the actual transfer buffer. 335 336 len = min_t(unsigned int, sectors, info->blocksize >> 337 info->smallpageshift) * PAGESIZE; 338 buffer = kmalloc(len, GFP_NOIO); 339 if (buffer == NULL) 340 return USB_STOR_TRANSPORT_ERROR; 341 offset = 0; 342 sg = NULL; 343 344 while (sectors > 0) { 345 346 /* have we got to end? */ 347 if (lba >= info->max_log_blks) 348 break; 349 350 pba = info->lba_to_pba[lba]; 351 352 // Write as many sectors as possible in this block 353 354 pages = min_t(unsigned int, sectors << info->smallpageshift, 355 info->blocksize - page); 356 len = pages << info->pageshift; 357 358 // Get the data from the transfer buffer 359 usb_stor_access_xfer_buf(buffer, len, us->srb, 360 &sg, &offset, FROM_XFER_BUF); 361 362 usb_stor_dbg(us, "Write %02X pages, to PBA %04X (LBA %04X) page %02X\n", 363 pages, pba, lba, page); 364 365 command[4] = 0; 366 367 if (pba == NOT_ALLOCATED) { 368 /* no pba allocated for this lba, find a free pba to use */ 369 370 int max_pba = (info->max_log_blks / 250 ) * 256; 371 int found_count = 0; 372 int found_pba = -1; 373 374 /* set pba to first block in zone lba is in */ 375 pba = (lba / 1000) * 1024; 376 377 usb_stor_dbg(us, "No PBA for LBA %04X\n", lba); 378 379 if (max_pba > 1024) 380 max_pba = 1024; 381 382 /* 383 * Scan through the map looking for an unused block 384 * leave 16 unused blocks at start (or as many as 385 * possible) since the sddr55 seems to reuse a used 386 * block when it shouldn't if we don't leave space. 387 */ 388 for (i = 0; i < max_pba; i++, pba++) { 389 if (info->pba_to_lba[pba] == UNUSED_BLOCK) { 390 found_pba = pba; 391 if (found_count++ > 16) 392 break; 393 } 394 } 395 396 pba = found_pba; 397 398 if (pba == -1) { 399 /* oh dear */ 400 usb_stor_dbg(us, "Couldn't find unallocated block\n"); 401 402 set_sense_info (3, 0x31, 0); /* medium error */ 403 result = USB_STOR_TRANSPORT_FAILED; 404 goto leave; 405 } 406 407 usb_stor_dbg(us, "Allocating PBA %04X for LBA %04X\n", 408 pba, lba); 409 410 /* set writing to unallocated block flag */ 411 command[4] = 0x40; 412 } 413 414 address = (pba << info->blockshift) + page; 415 416 command[1] = LSB_of(address>>16); 417 command[2] = LSB_of(address>>8); 418 command[3] = LSB_of(address); 419 420 /* set the lba into the command, modulo 1000 */ 421 command[0] = LSB_of(lba % 1000); 422 command[6] = MSB_of(lba % 1000); 423 424 command[4] |= LSB_of(pages >> info->smallpageshift); 425 command[5] = 0xB0; 426 command[7] = 0x86; 427 428 /* send command */ 429 result = sddr55_bulk_transport(us, 430 DMA_TO_DEVICE, command, 8); 431 432 if (result != USB_STOR_XFER_GOOD) { 433 usb_stor_dbg(us, "Result for send_command in write_data %d\n", 434 result); 435 436 /* set_sense_info is superfluous here? */ 437 set_sense_info (3, 0x3, 0);/* peripheral write error */ 438 result = USB_STOR_TRANSPORT_FAILED; 439 goto leave; 440 } 441 442 /* send the data */ 443 result = sddr55_bulk_transport(us, 444 DMA_TO_DEVICE, buffer, len); 445 446 if (result != USB_STOR_XFER_GOOD) { 447 usb_stor_dbg(us, "Result for send_data in write_data %d\n", 448 result); 449 450 /* set_sense_info is superfluous here? */ 451 set_sense_info (3, 0x3, 0);/* peripheral write error */ 452 result = USB_STOR_TRANSPORT_FAILED; 453 goto leave; 454 } 455 456 /* now read status */ 457 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6); 458 459 if (result != USB_STOR_XFER_GOOD) { 460 usb_stor_dbg(us, "Result for get_status in write_data %d\n", 461 result); 462 463 /* set_sense_info is superfluous here? */ 464 set_sense_info (3, 0x3, 0);/* peripheral write error */ 465 result = USB_STOR_TRANSPORT_FAILED; 466 goto leave; 467 } 468 469 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) 470 >> info->blockshift; 471 472 /* check if device-reported new_pba is out of range */ 473 if (new_pba >= (info->capacity >> (info->blockshift + info->pageshift))) { 474 result = USB_STOR_TRANSPORT_FAILED; 475 goto leave; 476 } 477 478 /* check status for error */ 479 if (status[0] == 0xff && status[1] == 0x4) { 480 info->pba_to_lba[new_pba] = BAD_BLOCK; 481 482 set_sense_info (3, 0x0c, 0); 483 result = USB_STOR_TRANSPORT_FAILED; 484 goto leave; 485 } 486 487 usb_stor_dbg(us, "Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n", 488 lba, pba, new_pba); 489 490 /* update the lba<->pba maps, note new_pba might be the same as pba */ 491 info->lba_to_pba[lba] = new_pba; 492 info->pba_to_lba[pba] = UNUSED_BLOCK; 493 494 /* check that new_pba wasn't already being used */ 495 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) { 496 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n", 497 new_pba, info->pba_to_lba[new_pba]); 498 info->fatal_error = 1; 499 set_sense_info (3, 0x31, 0); 500 result = USB_STOR_TRANSPORT_FAILED; 501 goto leave; 502 } 503 504 /* update the pba<->lba maps for new_pba */ 505 info->pba_to_lba[new_pba] = lba % 1000; 506 507 page = 0; 508 lba++; 509 sectors -= pages >> info->smallpageshift; 510 } 511 result = USB_STOR_TRANSPORT_GOOD; 512 513 leave: 514 kfree(buffer); 515 return result; 516 } 517 518 static int sddr55_read_deviceID(struct us_data *us, 519 unsigned char *manufacturerID, 520 unsigned char *deviceID) { 521 522 int result; 523 unsigned char *command = us->iobuf; 524 unsigned char *content = us->iobuf; 525 526 memset(command, 0, 8); 527 command[5] = 0xB0; 528 command[7] = 0x84; 529 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 530 531 usb_stor_dbg(us, "Result of send_control for device ID is %d\n", 532 result); 533 534 if (result != USB_STOR_XFER_GOOD) 535 return USB_STOR_TRANSPORT_ERROR; 536 537 result = sddr55_bulk_transport(us, 538 DMA_FROM_DEVICE, content, 4); 539 540 if (result != USB_STOR_XFER_GOOD) 541 return USB_STOR_TRANSPORT_ERROR; 542 543 *manufacturerID = content[0]; 544 *deviceID = content[1]; 545 546 if (content[0] != 0xff) { 547 result = sddr55_bulk_transport(us, 548 DMA_FROM_DEVICE, content, 2); 549 } 550 551 return USB_STOR_TRANSPORT_GOOD; 552 } 553 554 555 static int sddr55_reset(struct us_data *us) 556 { 557 return 0; 558 } 559 560 561 static unsigned long sddr55_get_capacity(struct us_data *us) { 562 563 unsigned char manufacturerID; 564 unsigned char deviceID; 565 int result; 566 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 567 568 usb_stor_dbg(us, "Reading capacity...\n"); 569 570 result = sddr55_read_deviceID(us, 571 &manufacturerID, 572 &deviceID); 573 574 usb_stor_dbg(us, "Result of read_deviceID is %d\n", result); 575 576 if (result != USB_STOR_XFER_GOOD) 577 return 0; 578 579 usb_stor_dbg(us, "Device ID = %02X\n", deviceID); 580 usb_stor_dbg(us, "Manuf ID = %02X\n", manufacturerID); 581 582 info->pageshift = 9; 583 info->smallpageshift = 0; 584 info->blocksize = 16; 585 info->blockshift = 4; 586 info->blockmask = 15; 587 588 switch (deviceID) { 589 590 case 0x6e: // 1MB 591 case 0xe8: 592 case 0xec: 593 info->pageshift = 8; 594 info->smallpageshift = 1; 595 return 0x00100000; 596 597 case 0xea: // 2MB 598 case 0x64: 599 info->pageshift = 8; 600 info->smallpageshift = 1; 601 fallthrough; 602 case 0x5d: // 5d is a ROM card with pagesize 512. 603 return 0x00200000; 604 605 case 0xe3: // 4MB 606 case 0xe5: 607 case 0x6b: 608 case 0xd5: 609 return 0x00400000; 610 611 case 0xe6: // 8MB 612 case 0xd6: 613 return 0x00800000; 614 615 case 0x73: // 16MB 616 info->blocksize = 32; 617 info->blockshift = 5; 618 info->blockmask = 31; 619 return 0x01000000; 620 621 case 0x75: // 32MB 622 info->blocksize = 32; 623 info->blockshift = 5; 624 info->blockmask = 31; 625 return 0x02000000; 626 627 case 0x76: // 64MB 628 info->blocksize = 32; 629 info->blockshift = 5; 630 info->blockmask = 31; 631 return 0x04000000; 632 633 case 0x79: // 128MB 634 info->blocksize = 32; 635 info->blockshift = 5; 636 info->blockmask = 31; 637 return 0x08000000; 638 639 default: // unknown 640 return 0; 641 642 } 643 } 644 645 static int sddr55_read_map(struct us_data *us) { 646 647 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra); 648 int numblocks; 649 unsigned char *buffer; 650 unsigned char *command = us->iobuf; 651 int i; 652 unsigned short lba; 653 unsigned short max_lba; 654 int result; 655 656 if (!info->capacity) 657 return -1; 658 659 numblocks = info->capacity >> (info->blockshift + info->pageshift); 660 661 buffer = kmalloc_array(numblocks, 2, GFP_NOIO ); 662 663 if (!buffer) 664 return -1; 665 666 memset(command, 0, 8); 667 command[5] = 0xB0; 668 command[6] = numblocks * 2 / 256; 669 command[7] = 0x8A; 670 671 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 672 673 if ( result != USB_STOR_XFER_GOOD) { 674 kfree (buffer); 675 return -1; 676 } 677 678 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2); 679 680 if ( result != USB_STOR_XFER_GOOD) { 681 kfree (buffer); 682 return -1; 683 } 684 685 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2); 686 687 if ( result != USB_STOR_XFER_GOOD) { 688 kfree (buffer); 689 return -1; 690 } 691 692 kfree(info->lba_to_pba); 693 kfree(info->pba_to_lba); 694 info->lba_to_pba = kmalloc_array(numblocks, sizeof(int), GFP_NOIO); 695 info->pba_to_lba = kmalloc_array(numblocks, sizeof(int), GFP_NOIO); 696 697 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) { 698 kfree(info->lba_to_pba); 699 kfree(info->pba_to_lba); 700 info->lba_to_pba = NULL; 701 info->pba_to_lba = NULL; 702 kfree(buffer); 703 return -1; 704 } 705 706 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int)); 707 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int)); 708 709 /* set maximum lba */ 710 max_lba = info->max_log_blks; 711 if (max_lba > 1000) 712 max_lba = 1000; 713 714 /* 715 * Each block is 64 bytes of control data, so block i is located in 716 * scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11) 717 */ 718 719 for (i=0; i<numblocks; i++) { 720 int zone = i / 1024; 721 722 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]); 723 724 /* 725 * Every 1024 physical blocks ("zone"), the LBA numbers 726 * go back to zero, but are within a higher 727 * block of LBA's. Also, there is a maximum of 728 * 1000 LBA's per zone. In other words, in PBA 729 * 1024-2047 you will find LBA 0-999 which are 730 * really LBA 1000-1999. Yes, this wastes 24 731 * physical blocks per zone. Go figure. 732 * These devices can have blocks go bad, so there 733 * are 24 spare blocks to use when blocks do go bad. 734 */ 735 736 /* 737 * SDDR55 returns 0xffff for a bad block, and 0x400 for the 738 * CIS block. (Is this true for cards 8MB or less??) 739 * Record these in the physical to logical map 740 */ 741 742 info->pba_to_lba[i] = lba; 743 744 if (lba >= max_lba) { 745 continue; 746 } 747 748 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED && 749 !info->force_read_only) { 750 printk(KERN_WARNING 751 "sddr55: map inconsistency at LBA %04X\n", 752 lba + zone * 1000); 753 info->force_read_only = 1; 754 } 755 756 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF)) 757 usb_stor_dbg(us, "LBA %04X <-> PBA %04X\n", lba, i); 758 759 info->lba_to_pba[lba + zone * 1000] = i; 760 } 761 762 kfree(buffer); 763 return 0; 764 } 765 766 767 static void sddr55_card_info_destructor(void *extra) { 768 struct sddr55_card_info *info = (struct sddr55_card_info *)extra; 769 770 if (!extra) 771 return; 772 773 kfree(info->lba_to_pba); 774 kfree(info->pba_to_lba); 775 } 776 777 778 /* 779 * Transport for the Sandisk SDDR-55 780 */ 781 static int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us) 782 { 783 int result; 784 static const unsigned char inquiry_response[8] = { 785 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00 786 }; 787 // write-protected for now, no block descriptor support 788 static const unsigned char mode_page_01[20] = { 789 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0, 790 0x01, 0x0A, 791 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 792 }; 793 unsigned char *ptr = us->iobuf; 794 unsigned long capacity; 795 unsigned int lba; 796 unsigned int pba; 797 unsigned int page; 798 unsigned short pages; 799 struct sddr55_card_info *info; 800 801 if (!us->extra) { 802 us->extra = kzalloc( 803 sizeof(struct sddr55_card_info), GFP_NOIO); 804 if (!us->extra) 805 return USB_STOR_TRANSPORT_ERROR; 806 us->extra_destructor = sddr55_card_info_destructor; 807 } 808 809 info = (struct sddr55_card_info *)(us->extra); 810 811 if (srb->cmnd[0] == REQUEST_SENSE) { 812 usb_stor_dbg(us, "request sense %02x/%02x/%02x\n", 813 info->sense_data[2], 814 info->sense_data[12], 815 info->sense_data[13]); 816 817 memcpy (ptr, info->sense_data, sizeof info->sense_data); 818 ptr[0] = 0x70; 819 ptr[7] = 11; 820 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb); 821 memset (info->sense_data, 0, sizeof info->sense_data); 822 823 return USB_STOR_TRANSPORT_GOOD; 824 } 825 826 memset (info->sense_data, 0, sizeof info->sense_data); 827 828 /* 829 * Dummy up a response for INQUIRY since SDDR55 doesn't 830 * respond to INQUIRY commands 831 */ 832 833 if (srb->cmnd[0] == INQUIRY) { 834 memcpy(ptr, inquiry_response, 8); 835 fill_inquiry_response(us, ptr, 36); 836 return USB_STOR_TRANSPORT_GOOD; 837 } 838 839 /* 840 * only check card status if the map isn't allocated, ie no card seen yet 841 * or if it's been over half a second since we last accessed it 842 */ 843 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) { 844 845 /* check to see if a card is fitted */ 846 result = sddr55_status (us); 847 if (result) { 848 result = sddr55_status (us); 849 if (!result) { 850 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */ 851 } 852 return USB_STOR_TRANSPORT_FAILED; 853 } 854 } 855 856 /* 857 * if we detected a problem with the map when writing, 858 * don't allow any more access 859 */ 860 if (info->fatal_error) { 861 862 set_sense_info (3, 0x31, 0); 863 return USB_STOR_TRANSPORT_FAILED; 864 } 865 866 if (srb->cmnd[0] == READ_CAPACITY) { 867 868 capacity = sddr55_get_capacity(us); 869 870 if (!capacity) { 871 set_sense_info (3, 0x30, 0); /* incompatible medium */ 872 return USB_STOR_TRANSPORT_FAILED; 873 } 874 875 info->capacity = capacity; 876 877 /* 878 * figure out the maximum logical block number, allowing for 879 * the fact that only 250 out of every 256 are used 880 */ 881 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250; 882 883 /* 884 * Last page in the card, adjust as we only use 250 out of 885 * every 256 pages 886 */ 887 capacity = (capacity / 256) * 250; 888 889 capacity /= PAGESIZE; 890 capacity--; 891 892 ((__be32 *) ptr)[0] = cpu_to_be32(capacity); 893 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE); 894 usb_stor_set_xfer_buf(ptr, 8, srb); 895 896 sddr55_read_map(us); 897 898 return USB_STOR_TRANSPORT_GOOD; 899 } 900 901 if (srb->cmnd[0] == MODE_SENSE_10) { 902 903 memcpy(ptr, mode_page_01, sizeof mode_page_01); 904 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0; 905 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb); 906 907 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) { 908 usb_stor_dbg(us, "Dummy up request for mode page 1\n"); 909 return USB_STOR_TRANSPORT_GOOD; 910 911 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) { 912 usb_stor_dbg(us, "Dummy up request for all mode pages\n"); 913 return USB_STOR_TRANSPORT_GOOD; 914 } 915 916 set_sense_info (5, 0x24, 0); /* invalid field in command */ 917 return USB_STOR_TRANSPORT_FAILED; 918 } 919 920 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { 921 922 usb_stor_dbg(us, "%s medium removal. Not that I can do anything about it...\n", 923 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow"); 924 925 return USB_STOR_TRANSPORT_GOOD; 926 927 } 928 929 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) { 930 931 page = short_pack(srb->cmnd[3], srb->cmnd[2]); 932 page <<= 16; 933 page |= short_pack(srb->cmnd[5], srb->cmnd[4]); 934 pages = short_pack(srb->cmnd[8], srb->cmnd[7]); 935 936 page <<= info->smallpageshift; 937 938 // convert page to block and page-within-block 939 940 lba = page >> info->blockshift; 941 page = page & info->blockmask; 942 943 // locate physical block corresponding to logical block 944 945 if (lba >= info->max_log_blks) { 946 947 usb_stor_dbg(us, "Error: Requested LBA %04X exceeds maximum block %04X\n", 948 lba, info->max_log_blks - 1); 949 950 set_sense_info (5, 0x24, 0); /* invalid field in command */ 951 952 return USB_STOR_TRANSPORT_FAILED; 953 } 954 955 pba = info->lba_to_pba[lba]; 956 957 if (srb->cmnd[0] == WRITE_10) { 958 usb_stor_dbg(us, "WRITE_10: write block %04X (LBA %04X) page %01X pages %d\n", 959 pba, lba, page, pages); 960 961 return sddr55_write_data(us, lba, page, pages); 962 } else { 963 usb_stor_dbg(us, "READ_10: read block %04X (LBA %04X) page %01X pages %d\n", 964 pba, lba, page, pages); 965 966 return sddr55_read_data(us, lba, page, pages); 967 } 968 } 969 970 971 if (srb->cmnd[0] == TEST_UNIT_READY) { 972 return USB_STOR_TRANSPORT_GOOD; 973 } 974 975 if (srb->cmnd[0] == START_STOP) { 976 return USB_STOR_TRANSPORT_GOOD; 977 } 978 979 set_sense_info (5, 0x20, 0); /* illegal command */ 980 981 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer? 982 } 983 984 static struct scsi_host_template sddr55_host_template; 985 986 static int sddr55_probe(struct usb_interface *intf, 987 const struct usb_device_id *id) 988 { 989 struct us_data *us; 990 int result; 991 992 result = usb_stor_probe1(&us, intf, id, 993 (id - sddr55_usb_ids) + sddr55_unusual_dev_list, 994 &sddr55_host_template); 995 if (result) 996 return result; 997 998 us->transport_name = "SDDR55"; 999 us->transport = sddr55_transport; 1000 us->transport_reset = sddr55_reset; 1001 us->max_lun = 0; 1002 1003 result = usb_stor_probe2(us); 1004 return result; 1005 } 1006 1007 static struct usb_driver sddr55_driver = { 1008 .name = DRV_NAME, 1009 .probe = sddr55_probe, 1010 .disconnect = usb_stor_disconnect, 1011 .suspend = usb_stor_suspend, 1012 .resume = usb_stor_resume, 1013 .reset_resume = usb_stor_reset_resume, 1014 .pre_reset = usb_stor_pre_reset, 1015 .post_reset = usb_stor_post_reset, 1016 .id_table = sddr55_usb_ids, 1017 .soft_unbind = 1, 1018 .no_dynamic_id = 1, 1019 }; 1020 1021 module_usb_stor_driver(sddr55_driver, sddr55_host_template, DRV_NAME); 1022