1 /* Driver for SanDisk SDDR-55 SmartMedia reader 2 * 3 * SDDR55 driver v0.1: 4 * 5 * First release 6 * 7 * Current development and maintenance by: 8 * (c) 2002 Simon Munton 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2, or (at your option) any 13 * later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with this program; if not, write to the Free Software Foundation, Inc., 22 * 675 Mass Ave, Cambridge, MA 02139, USA. 23 */ 24 25 #include <linux/jiffies.h> 26 #include <linux/errno.h> 27 #include <linux/slab.h> 28 29 #include <scsi/scsi.h> 30 #include <scsi/scsi_cmnd.h> 31 32 #include "usb.h" 33 #include "transport.h" 34 #include "protocol.h" 35 #include "debug.h" 36 #include "sddr55.h" 37 38 39 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) ) 40 #define LSB_of(s) ((s)&0xFF) 41 #define MSB_of(s) ((s)>>8) 42 #define PAGESIZE 512 43 44 #define set_sense_info(sk, asc, ascq) \ 45 do { \ 46 info->sense_data[2] = sk; \ 47 info->sense_data[12] = asc; \ 48 info->sense_data[13] = ascq; \ 49 } while (0) 50 51 52 struct sddr55_card_info { 53 unsigned long capacity; /* Size of card in bytes */ 54 int max_log_blks; /* maximum number of logical blocks */ 55 int pageshift; /* log2 of pagesize */ 56 int smallpageshift; /* 1 if pagesize == 256 */ 57 int blocksize; /* Size of block in pages */ 58 int blockshift; /* log2 of blocksize */ 59 int blockmask; /* 2^blockshift - 1 */ 60 int read_only; /* non zero if card is write protected */ 61 int force_read_only; /* non zero if we find a map error*/ 62 int *lba_to_pba; /* logical to physical map */ 63 int *pba_to_lba; /* physical to logical map */ 64 int fatal_error; /* set if we detect something nasty */ 65 unsigned long last_access; /* number of jiffies since we last talked to device */ 66 unsigned char sense_data[18]; 67 }; 68 69 70 #define NOT_ALLOCATED 0xffffffff 71 #define BAD_BLOCK 0xffff 72 #define CIS_BLOCK 0x400 73 #define UNUSED_BLOCK 0x3ff 74 75 static int 76 sddr55_bulk_transport(struct us_data *us, int direction, 77 unsigned char *data, unsigned int len) { 78 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 79 unsigned int pipe = (direction == DMA_FROM_DEVICE) ? 80 us->recv_bulk_pipe : us->send_bulk_pipe; 81 82 if (!len) 83 return USB_STOR_XFER_GOOD; 84 info->last_access = jiffies; 85 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL); 86 } 87 88 /* check if card inserted, if there is, update read_only status 89 * return non zero if no card 90 */ 91 92 static int sddr55_status(struct us_data *us) 93 { 94 int result; 95 unsigned char *command = us->iobuf; 96 unsigned char *status = us->iobuf; 97 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 98 99 /* send command */ 100 memset(command, 0, 8); 101 command[5] = 0xB0; 102 command[7] = 0x80; 103 result = sddr55_bulk_transport(us, 104 DMA_TO_DEVICE, command, 8); 105 106 US_DEBUGP("Result for send_command in status %d\n", 107 result); 108 109 if (result != USB_STOR_XFER_GOOD) { 110 set_sense_info (4, 0, 0); /* hardware error */ 111 return USB_STOR_TRANSPORT_ERROR; 112 } 113 114 result = sddr55_bulk_transport(us, 115 DMA_FROM_DEVICE, status, 4); 116 117 /* expect to get short transfer if no card fitted */ 118 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) { 119 /* had a short transfer, no card inserted, free map memory */ 120 kfree(info->lba_to_pba); 121 kfree(info->pba_to_lba); 122 info->lba_to_pba = NULL; 123 info->pba_to_lba = NULL; 124 125 info->fatal_error = 0; 126 info->force_read_only = 0; 127 128 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */ 129 return USB_STOR_TRANSPORT_FAILED; 130 } 131 132 if (result != USB_STOR_XFER_GOOD) { 133 set_sense_info (4, 0, 0); /* hardware error */ 134 return USB_STOR_TRANSPORT_FAILED; 135 } 136 137 /* check write protect status */ 138 info->read_only = (status[0] & 0x20); 139 140 /* now read status */ 141 result = sddr55_bulk_transport(us, 142 DMA_FROM_DEVICE, status, 2); 143 144 if (result != USB_STOR_XFER_GOOD) { 145 set_sense_info (4, 0, 0); /* hardware error */ 146 } 147 148 return (result == USB_STOR_XFER_GOOD ? 149 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED); 150 } 151 152 153 static int sddr55_read_data(struct us_data *us, 154 unsigned int lba, 155 unsigned int page, 156 unsigned short sectors) { 157 158 int result = USB_STOR_TRANSPORT_GOOD; 159 unsigned char *command = us->iobuf; 160 unsigned char *status = us->iobuf; 161 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 162 unsigned char *buffer; 163 164 unsigned int pba; 165 unsigned long address; 166 167 unsigned short pages; 168 unsigned int len, offset; 169 struct scatterlist *sg; 170 171 // Since we only read in one block at a time, we have to create 172 // a bounce buffer and move the data a piece at a time between the 173 // bounce buffer and the actual transfer buffer. 174 175 len = min((unsigned int) sectors, (unsigned int) info->blocksize >> 176 info->smallpageshift) * PAGESIZE; 177 buffer = kmalloc(len, GFP_NOIO); 178 if (buffer == NULL) 179 return USB_STOR_TRANSPORT_ERROR; /* out of memory */ 180 offset = 0; 181 sg = NULL; 182 183 while (sectors>0) { 184 185 /* have we got to end? */ 186 if (lba >= info->max_log_blks) 187 break; 188 189 pba = info->lba_to_pba[lba]; 190 191 // Read as many sectors as possible in this block 192 193 pages = min((unsigned int) sectors << info->smallpageshift, 194 info->blocksize - page); 195 len = pages << info->pageshift; 196 197 US_DEBUGP("Read %02X pages, from PBA %04X" 198 " (LBA %04X) page %02X\n", 199 pages, pba, lba, page); 200 201 if (pba == NOT_ALLOCATED) { 202 /* no pba for this lba, fill with zeroes */ 203 memset (buffer, 0, len); 204 } else { 205 206 address = (pba << info->blockshift) + page; 207 208 command[0] = 0; 209 command[1] = LSB_of(address>>16); 210 command[2] = LSB_of(address>>8); 211 command[3] = LSB_of(address); 212 213 command[4] = 0; 214 command[5] = 0xB0; 215 command[6] = LSB_of(pages << (1 - info->smallpageshift)); 216 command[7] = 0x85; 217 218 /* send command */ 219 result = sddr55_bulk_transport(us, 220 DMA_TO_DEVICE, command, 8); 221 222 US_DEBUGP("Result for send_command in read_data %d\n", 223 result); 224 225 if (result != USB_STOR_XFER_GOOD) { 226 result = USB_STOR_TRANSPORT_ERROR; 227 goto leave; 228 } 229 230 /* read data */ 231 result = sddr55_bulk_transport(us, 232 DMA_FROM_DEVICE, buffer, len); 233 234 if (result != USB_STOR_XFER_GOOD) { 235 result = USB_STOR_TRANSPORT_ERROR; 236 goto leave; 237 } 238 239 /* now read status */ 240 result = sddr55_bulk_transport(us, 241 DMA_FROM_DEVICE, status, 2); 242 243 if (result != USB_STOR_XFER_GOOD) { 244 result = USB_STOR_TRANSPORT_ERROR; 245 goto leave; 246 } 247 248 /* check status for error */ 249 if (status[0] == 0xff && status[1] == 0x4) { 250 set_sense_info (3, 0x11, 0); 251 result = USB_STOR_TRANSPORT_FAILED; 252 goto leave; 253 } 254 } 255 256 // Store the data in the transfer buffer 257 usb_stor_access_xfer_buf(buffer, len, us->srb, 258 &sg, &offset, TO_XFER_BUF); 259 260 page = 0; 261 lba++; 262 sectors -= pages >> info->smallpageshift; 263 } 264 265 result = USB_STOR_TRANSPORT_GOOD; 266 267 leave: 268 kfree(buffer); 269 270 return result; 271 } 272 273 static int sddr55_write_data(struct us_data *us, 274 unsigned int lba, 275 unsigned int page, 276 unsigned short sectors) { 277 278 int result = USB_STOR_TRANSPORT_GOOD; 279 unsigned char *command = us->iobuf; 280 unsigned char *status = us->iobuf; 281 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 282 unsigned char *buffer; 283 284 unsigned int pba; 285 unsigned int new_pba; 286 unsigned long address; 287 288 unsigned short pages; 289 int i; 290 unsigned int len, offset; 291 struct scatterlist *sg; 292 293 /* check if we are allowed to write */ 294 if (info->read_only || info->force_read_only) { 295 set_sense_info (7, 0x27, 0); /* read only */ 296 return USB_STOR_TRANSPORT_FAILED; 297 } 298 299 // Since we only write one block at a time, we have to create 300 // a bounce buffer and move the data a piece at a time between the 301 // bounce buffer and the actual transfer buffer. 302 303 len = min((unsigned int) sectors, (unsigned int) info->blocksize >> 304 info->smallpageshift) * PAGESIZE; 305 buffer = kmalloc(len, GFP_NOIO); 306 if (buffer == NULL) 307 return USB_STOR_TRANSPORT_ERROR; 308 offset = 0; 309 sg = NULL; 310 311 while (sectors > 0) { 312 313 /* have we got to end? */ 314 if (lba >= info->max_log_blks) 315 break; 316 317 pba = info->lba_to_pba[lba]; 318 319 // Write as many sectors as possible in this block 320 321 pages = min((unsigned int) sectors << info->smallpageshift, 322 info->blocksize - page); 323 len = pages << info->pageshift; 324 325 // Get the data from the transfer buffer 326 usb_stor_access_xfer_buf(buffer, len, us->srb, 327 &sg, &offset, FROM_XFER_BUF); 328 329 US_DEBUGP("Write %02X pages, to PBA %04X" 330 " (LBA %04X) page %02X\n", 331 pages, pba, lba, page); 332 333 command[4] = 0; 334 335 if (pba == NOT_ALLOCATED) { 336 /* no pba allocated for this lba, find a free pba to use */ 337 338 int max_pba = (info->max_log_blks / 250 ) * 256; 339 int found_count = 0; 340 int found_pba = -1; 341 342 /* set pba to first block in zone lba is in */ 343 pba = (lba / 1000) * 1024; 344 345 US_DEBUGP("No PBA for LBA %04X\n",lba); 346 347 if (max_pba > 1024) 348 max_pba = 1024; 349 350 /* 351 * Scan through the map looking for an unused block 352 * leave 16 unused blocks at start (or as many as 353 * possible) since the sddr55 seems to reuse a used 354 * block when it shouldn't if we don't leave space. 355 */ 356 for (i = 0; i < max_pba; i++, pba++) { 357 if (info->pba_to_lba[pba] == UNUSED_BLOCK) { 358 found_pba = pba; 359 if (found_count++ > 16) 360 break; 361 } 362 } 363 364 pba = found_pba; 365 366 if (pba == -1) { 367 /* oh dear */ 368 US_DEBUGP("Couldn't find unallocated block\n"); 369 370 set_sense_info (3, 0x31, 0); /* medium error */ 371 result = USB_STOR_TRANSPORT_FAILED; 372 goto leave; 373 } 374 375 US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba); 376 377 /* set writing to unallocated block flag */ 378 command[4] = 0x40; 379 } 380 381 address = (pba << info->blockshift) + page; 382 383 command[1] = LSB_of(address>>16); 384 command[2] = LSB_of(address>>8); 385 command[3] = LSB_of(address); 386 387 /* set the lba into the command, modulo 1000 */ 388 command[0] = LSB_of(lba % 1000); 389 command[6] = MSB_of(lba % 1000); 390 391 command[4] |= LSB_of(pages >> info->smallpageshift); 392 command[5] = 0xB0; 393 command[7] = 0x86; 394 395 /* send command */ 396 result = sddr55_bulk_transport(us, 397 DMA_TO_DEVICE, command, 8); 398 399 if (result != USB_STOR_XFER_GOOD) { 400 US_DEBUGP("Result for send_command in write_data %d\n", 401 result); 402 403 /* set_sense_info is superfluous here? */ 404 set_sense_info (3, 0x3, 0);/* peripheral write error */ 405 result = USB_STOR_TRANSPORT_FAILED; 406 goto leave; 407 } 408 409 /* send the data */ 410 result = sddr55_bulk_transport(us, 411 DMA_TO_DEVICE, buffer, len); 412 413 if (result != USB_STOR_XFER_GOOD) { 414 US_DEBUGP("Result for send_data in write_data %d\n", 415 result); 416 417 /* set_sense_info is superfluous here? */ 418 set_sense_info (3, 0x3, 0);/* peripheral write error */ 419 result = USB_STOR_TRANSPORT_FAILED; 420 goto leave; 421 } 422 423 /* now read status */ 424 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6); 425 426 if (result != USB_STOR_XFER_GOOD) { 427 US_DEBUGP("Result for get_status in write_data %d\n", 428 result); 429 430 /* set_sense_info is superfluous here? */ 431 set_sense_info (3, 0x3, 0);/* peripheral write error */ 432 result = USB_STOR_TRANSPORT_FAILED; 433 goto leave; 434 } 435 436 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) 437 >> info->blockshift; 438 439 /* check status for error */ 440 if (status[0] == 0xff && status[1] == 0x4) { 441 info->pba_to_lba[new_pba] = BAD_BLOCK; 442 443 set_sense_info (3, 0x0c, 0); 444 result = USB_STOR_TRANSPORT_FAILED; 445 goto leave; 446 } 447 448 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n", 449 lba, pba, new_pba); 450 451 /* update the lba<->pba maps, note new_pba might be the same as pba */ 452 info->lba_to_pba[lba] = new_pba; 453 info->pba_to_lba[pba] = UNUSED_BLOCK; 454 455 /* check that new_pba wasn't already being used */ 456 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) { 457 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n", 458 new_pba, info->pba_to_lba[new_pba]); 459 info->fatal_error = 1; 460 set_sense_info (3, 0x31, 0); 461 result = USB_STOR_TRANSPORT_FAILED; 462 goto leave; 463 } 464 465 /* update the pba<->lba maps for new_pba */ 466 info->pba_to_lba[new_pba] = lba % 1000; 467 468 page = 0; 469 lba++; 470 sectors -= pages >> info->smallpageshift; 471 } 472 result = USB_STOR_TRANSPORT_GOOD; 473 474 leave: 475 kfree(buffer); 476 return result; 477 } 478 479 static int sddr55_read_deviceID(struct us_data *us, 480 unsigned char *manufacturerID, 481 unsigned char *deviceID) { 482 483 int result; 484 unsigned char *command = us->iobuf; 485 unsigned char *content = us->iobuf; 486 487 memset(command, 0, 8); 488 command[5] = 0xB0; 489 command[7] = 0x84; 490 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 491 492 US_DEBUGP("Result of send_control for device ID is %d\n", 493 result); 494 495 if (result != USB_STOR_XFER_GOOD) 496 return USB_STOR_TRANSPORT_ERROR; 497 498 result = sddr55_bulk_transport(us, 499 DMA_FROM_DEVICE, content, 4); 500 501 if (result != USB_STOR_XFER_GOOD) 502 return USB_STOR_TRANSPORT_ERROR; 503 504 *manufacturerID = content[0]; 505 *deviceID = content[1]; 506 507 if (content[0] != 0xff) { 508 result = sddr55_bulk_transport(us, 509 DMA_FROM_DEVICE, content, 2); 510 } 511 512 return USB_STOR_TRANSPORT_GOOD; 513 } 514 515 516 int sddr55_reset(struct us_data *us) { 517 return 0; 518 } 519 520 521 static unsigned long sddr55_get_capacity(struct us_data *us) { 522 523 unsigned char uninitialized_var(manufacturerID); 524 unsigned char uninitialized_var(deviceID); 525 int result; 526 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 527 528 US_DEBUGP("Reading capacity...\n"); 529 530 result = sddr55_read_deviceID(us, 531 &manufacturerID, 532 &deviceID); 533 534 US_DEBUGP("Result of read_deviceID is %d\n", 535 result); 536 537 if (result != USB_STOR_XFER_GOOD) 538 return 0; 539 540 US_DEBUGP("Device ID = %02X\n", deviceID); 541 US_DEBUGP("Manuf ID = %02X\n", manufacturerID); 542 543 info->pageshift = 9; 544 info->smallpageshift = 0; 545 info->blocksize = 16; 546 info->blockshift = 4; 547 info->blockmask = 15; 548 549 switch (deviceID) { 550 551 case 0x6e: // 1MB 552 case 0xe8: 553 case 0xec: 554 info->pageshift = 8; 555 info->smallpageshift = 1; 556 return 0x00100000; 557 558 case 0xea: // 2MB 559 case 0x64: 560 info->pageshift = 8; 561 info->smallpageshift = 1; 562 case 0x5d: // 5d is a ROM card with pagesize 512. 563 return 0x00200000; 564 565 case 0xe3: // 4MB 566 case 0xe5: 567 case 0x6b: 568 case 0xd5: 569 return 0x00400000; 570 571 case 0xe6: // 8MB 572 case 0xd6: 573 return 0x00800000; 574 575 case 0x73: // 16MB 576 info->blocksize = 32; 577 info->blockshift = 5; 578 info->blockmask = 31; 579 return 0x01000000; 580 581 case 0x75: // 32MB 582 info->blocksize = 32; 583 info->blockshift = 5; 584 info->blockmask = 31; 585 return 0x02000000; 586 587 case 0x76: // 64MB 588 info->blocksize = 32; 589 info->blockshift = 5; 590 info->blockmask = 31; 591 return 0x04000000; 592 593 case 0x79: // 128MB 594 info->blocksize = 32; 595 info->blockshift = 5; 596 info->blockmask = 31; 597 return 0x08000000; 598 599 default: // unknown 600 return 0; 601 602 } 603 } 604 605 static int sddr55_read_map(struct us_data *us) { 606 607 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra); 608 int numblocks; 609 unsigned char *buffer; 610 unsigned char *command = us->iobuf; 611 int i; 612 unsigned short lba; 613 unsigned short max_lba; 614 int result; 615 616 if (!info->capacity) 617 return -1; 618 619 numblocks = info->capacity >> (info->blockshift + info->pageshift); 620 621 buffer = kmalloc( numblocks * 2, GFP_NOIO ); 622 623 if (!buffer) 624 return -1; 625 626 memset(command, 0, 8); 627 command[5] = 0xB0; 628 command[6] = numblocks * 2 / 256; 629 command[7] = 0x8A; 630 631 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 632 633 if ( result != USB_STOR_XFER_GOOD) { 634 kfree (buffer); 635 return -1; 636 } 637 638 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2); 639 640 if ( result != USB_STOR_XFER_GOOD) { 641 kfree (buffer); 642 return -1; 643 } 644 645 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2); 646 647 if ( result != USB_STOR_XFER_GOOD) { 648 kfree (buffer); 649 return -1; 650 } 651 652 kfree(info->lba_to_pba); 653 kfree(info->pba_to_lba); 654 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO); 655 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO); 656 657 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) { 658 kfree(info->lba_to_pba); 659 kfree(info->pba_to_lba); 660 info->lba_to_pba = NULL; 661 info->pba_to_lba = NULL; 662 kfree(buffer); 663 return -1; 664 } 665 666 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int)); 667 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int)); 668 669 /* set maximum lba */ 670 max_lba = info->max_log_blks; 671 if (max_lba > 1000) 672 max_lba = 1000; 673 674 // Each block is 64 bytes of control data, so block i is located in 675 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11) 676 677 for (i=0; i<numblocks; i++) { 678 int zone = i / 1024; 679 680 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]); 681 682 /* Every 1024 physical blocks ("zone"), the LBA numbers 683 * go back to zero, but are within a higher 684 * block of LBA's. Also, there is a maximum of 685 * 1000 LBA's per zone. In other words, in PBA 686 * 1024-2047 you will find LBA 0-999 which are 687 * really LBA 1000-1999. Yes, this wastes 24 688 * physical blocks per zone. Go figure. 689 * These devices can have blocks go bad, so there 690 * are 24 spare blocks to use when blocks do go bad. 691 */ 692 693 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the 694 * CIS block. (Is this true for cards 8MB or less??) 695 * Record these in the physical to logical map 696 */ 697 698 info->pba_to_lba[i] = lba; 699 700 if (lba >= max_lba) { 701 continue; 702 } 703 704 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED && 705 !info->force_read_only) { 706 printk("sddr55: map inconsistency at LBA %04X\n", lba + zone * 1000); 707 info->force_read_only = 1; 708 } 709 710 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF)) 711 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i); 712 713 info->lba_to_pba[lba + zone * 1000] = i; 714 } 715 716 kfree(buffer); 717 return 0; 718 } 719 720 721 static void sddr55_card_info_destructor(void *extra) { 722 struct sddr55_card_info *info = (struct sddr55_card_info *)extra; 723 724 if (!extra) 725 return; 726 727 kfree(info->lba_to_pba); 728 kfree(info->pba_to_lba); 729 } 730 731 732 /* 733 * Transport for the Sandisk SDDR-55 734 */ 735 int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us) 736 { 737 int result; 738 static unsigned char inquiry_response[8] = { 739 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00 740 }; 741 // write-protected for now, no block descriptor support 742 static unsigned char mode_page_01[20] = { 743 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0, 744 0x01, 0x0A, 745 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 746 }; 747 unsigned char *ptr = us->iobuf; 748 unsigned long capacity; 749 unsigned int lba; 750 unsigned int pba; 751 unsigned int page; 752 unsigned short pages; 753 struct sddr55_card_info *info; 754 755 if (!us->extra) { 756 us->extra = kzalloc( 757 sizeof(struct sddr55_card_info), GFP_NOIO); 758 if (!us->extra) 759 return USB_STOR_TRANSPORT_ERROR; 760 us->extra_destructor = sddr55_card_info_destructor; 761 } 762 763 info = (struct sddr55_card_info *)(us->extra); 764 765 if (srb->cmnd[0] == REQUEST_SENSE) { 766 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]); 767 768 memcpy (ptr, info->sense_data, sizeof info->sense_data); 769 ptr[0] = 0x70; 770 ptr[7] = 11; 771 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb); 772 memset (info->sense_data, 0, sizeof info->sense_data); 773 774 return USB_STOR_TRANSPORT_GOOD; 775 } 776 777 memset (info->sense_data, 0, sizeof info->sense_data); 778 779 /* Dummy up a response for INQUIRY since SDDR55 doesn't 780 respond to INQUIRY commands */ 781 782 if (srb->cmnd[0] == INQUIRY) { 783 memcpy(ptr, inquiry_response, 8); 784 fill_inquiry_response(us, ptr, 36); 785 return USB_STOR_TRANSPORT_GOOD; 786 } 787 788 /* only check card status if the map isn't allocated, ie no card seen yet 789 * or if it's been over half a second since we last accessed it 790 */ 791 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) { 792 793 /* check to see if a card is fitted */ 794 result = sddr55_status (us); 795 if (result) { 796 result = sddr55_status (us); 797 if (!result) { 798 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */ 799 } 800 return USB_STOR_TRANSPORT_FAILED; 801 } 802 } 803 804 /* if we detected a problem with the map when writing, 805 don't allow any more access */ 806 if (info->fatal_error) { 807 808 set_sense_info (3, 0x31, 0); 809 return USB_STOR_TRANSPORT_FAILED; 810 } 811 812 if (srb->cmnd[0] == READ_CAPACITY) { 813 814 capacity = sddr55_get_capacity(us); 815 816 if (!capacity) { 817 set_sense_info (3, 0x30, 0); /* incompatible medium */ 818 return USB_STOR_TRANSPORT_FAILED; 819 } 820 821 info->capacity = capacity; 822 823 /* figure out the maximum logical block number, allowing for 824 * the fact that only 250 out of every 256 are used */ 825 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250; 826 827 /* Last page in the card, adjust as we only use 250 out of 828 * every 256 pages */ 829 capacity = (capacity / 256) * 250; 830 831 capacity /= PAGESIZE; 832 capacity--; 833 834 ((__be32 *) ptr)[0] = cpu_to_be32(capacity); 835 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE); 836 usb_stor_set_xfer_buf(ptr, 8, srb); 837 838 sddr55_read_map(us); 839 840 return USB_STOR_TRANSPORT_GOOD; 841 } 842 843 if (srb->cmnd[0] == MODE_SENSE_10) { 844 845 memcpy(ptr, mode_page_01, sizeof mode_page_01); 846 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0; 847 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb); 848 849 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) { 850 US_DEBUGP( 851 "SDDR55: Dummy up request for mode page 1\n"); 852 return USB_STOR_TRANSPORT_GOOD; 853 854 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) { 855 US_DEBUGP( 856 "SDDR55: Dummy up request for all mode pages\n"); 857 return USB_STOR_TRANSPORT_GOOD; 858 } 859 860 set_sense_info (5, 0x24, 0); /* invalid field in command */ 861 return USB_STOR_TRANSPORT_FAILED; 862 } 863 864 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { 865 866 US_DEBUGP( 867 "SDDR55: %s medium removal. Not that I can do" 868 " anything about it...\n", 869 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow"); 870 871 return USB_STOR_TRANSPORT_GOOD; 872 873 } 874 875 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) { 876 877 page = short_pack(srb->cmnd[3], srb->cmnd[2]); 878 page <<= 16; 879 page |= short_pack(srb->cmnd[5], srb->cmnd[4]); 880 pages = short_pack(srb->cmnd[8], srb->cmnd[7]); 881 882 page <<= info->smallpageshift; 883 884 // convert page to block and page-within-block 885 886 lba = page >> info->blockshift; 887 page = page & info->blockmask; 888 889 // locate physical block corresponding to logical block 890 891 if (lba >= info->max_log_blks) { 892 893 US_DEBUGP("Error: Requested LBA %04X exceeds maximum " 894 "block %04X\n", lba, info->max_log_blks-1); 895 896 set_sense_info (5, 0x24, 0); /* invalid field in command */ 897 898 return USB_STOR_TRANSPORT_FAILED; 899 } 900 901 pba = info->lba_to_pba[lba]; 902 903 if (srb->cmnd[0] == WRITE_10) { 904 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X" 905 " pages %d\n", 906 pba, lba, page, pages); 907 908 return sddr55_write_data(us, lba, page, pages); 909 } else { 910 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X" 911 " pages %d\n", 912 pba, lba, page, pages); 913 914 return sddr55_read_data(us, lba, page, pages); 915 } 916 } 917 918 919 if (srb->cmnd[0] == TEST_UNIT_READY) { 920 return USB_STOR_TRANSPORT_GOOD; 921 } 922 923 if (srb->cmnd[0] == START_STOP) { 924 return USB_STOR_TRANSPORT_GOOD; 925 } 926 927 set_sense_info (5, 0x20, 0); /* illegal command */ 928 929 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer? 930 } 931 932