1 /* Driver for SanDisk SDDR-55 SmartMedia reader 2 * 3 * $Id:$ 4 * 5 * SDDR55 driver v0.1: 6 * 7 * First release 8 * 9 * Current development and maintenance by: 10 * (c) 2002 Simon Munton 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2, or (at your option) any 15 * later version. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License along 23 * with this program; if not, write to the Free Software Foundation, Inc., 24 * 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/jiffies.h> 28 #include <linux/errno.h> 29 #include <linux/slab.h> 30 31 #include <scsi/scsi.h> 32 #include <scsi/scsi_cmnd.h> 33 34 #include "usb.h" 35 #include "transport.h" 36 #include "protocol.h" 37 #include "debug.h" 38 #include "sddr55.h" 39 40 41 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) ) 42 #define LSB_of(s) ((s)&0xFF) 43 #define MSB_of(s) ((s)>>8) 44 #define PAGESIZE 512 45 46 #define set_sense_info(sk, asc, ascq) \ 47 do { \ 48 info->sense_data[2] = sk; \ 49 info->sense_data[12] = asc; \ 50 info->sense_data[13] = ascq; \ 51 } while (0) 52 53 54 struct sddr55_card_info { 55 unsigned long capacity; /* Size of card in bytes */ 56 int max_log_blks; /* maximum number of logical blocks */ 57 int pageshift; /* log2 of pagesize */ 58 int smallpageshift; /* 1 if pagesize == 256 */ 59 int blocksize; /* Size of block in pages */ 60 int blockshift; /* log2 of blocksize */ 61 int blockmask; /* 2^blockshift - 1 */ 62 int read_only; /* non zero if card is write protected */ 63 int force_read_only; /* non zero if we find a map error*/ 64 int *lba_to_pba; /* logical to physical map */ 65 int *pba_to_lba; /* physical to logical map */ 66 int fatal_error; /* set if we detect something nasty */ 67 unsigned long last_access; /* number of jiffies since we last talked to device */ 68 unsigned char sense_data[18]; 69 }; 70 71 72 #define NOT_ALLOCATED 0xffffffff 73 #define BAD_BLOCK 0xffff 74 #define CIS_BLOCK 0x400 75 #define UNUSED_BLOCK 0x3ff 76 77 static int 78 sddr55_bulk_transport(struct us_data *us, int direction, 79 unsigned char *data, unsigned int len) { 80 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 81 unsigned int pipe = (direction == DMA_FROM_DEVICE) ? 82 us->recv_bulk_pipe : us->send_bulk_pipe; 83 84 if (!len) 85 return USB_STOR_XFER_GOOD; 86 info->last_access = jiffies; 87 return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL); 88 } 89 90 /* check if card inserted, if there is, update read_only status 91 * return non zero if no card 92 */ 93 94 static int sddr55_status(struct us_data *us) 95 { 96 int result; 97 unsigned char *command = us->iobuf; 98 unsigned char *status = us->iobuf; 99 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 100 101 /* send command */ 102 memset(command, 0, 8); 103 command[5] = 0xB0; 104 command[7] = 0x80; 105 result = sddr55_bulk_transport(us, 106 DMA_TO_DEVICE, command, 8); 107 108 US_DEBUGP("Result for send_command in status %d\n", 109 result); 110 111 if (result != USB_STOR_XFER_GOOD) { 112 set_sense_info (4, 0, 0); /* hardware error */ 113 return USB_STOR_TRANSPORT_ERROR; 114 } 115 116 result = sddr55_bulk_transport(us, 117 DMA_FROM_DEVICE, status, 4); 118 119 /* expect to get short transfer if no card fitted */ 120 if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) { 121 /* had a short transfer, no card inserted, free map memory */ 122 kfree(info->lba_to_pba); 123 kfree(info->pba_to_lba); 124 info->lba_to_pba = NULL; 125 info->pba_to_lba = NULL; 126 127 info->fatal_error = 0; 128 info->force_read_only = 0; 129 130 set_sense_info (2, 0x3a, 0); /* not ready, medium not present */ 131 return USB_STOR_TRANSPORT_FAILED; 132 } 133 134 if (result != USB_STOR_XFER_GOOD) { 135 set_sense_info (4, 0, 0); /* hardware error */ 136 return USB_STOR_TRANSPORT_FAILED; 137 } 138 139 /* check write protect status */ 140 info->read_only = (status[0] & 0x20); 141 142 /* now read status */ 143 result = sddr55_bulk_transport(us, 144 DMA_FROM_DEVICE, status, 2); 145 146 if (result != USB_STOR_XFER_GOOD) { 147 set_sense_info (4, 0, 0); /* hardware error */ 148 } 149 150 return (result == USB_STOR_XFER_GOOD ? 151 USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED); 152 } 153 154 155 static int sddr55_read_data(struct us_data *us, 156 unsigned int lba, 157 unsigned int page, 158 unsigned short sectors) { 159 160 int result = USB_STOR_TRANSPORT_GOOD; 161 unsigned char *command = us->iobuf; 162 unsigned char *status = us->iobuf; 163 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 164 unsigned char *buffer; 165 166 unsigned int pba; 167 unsigned long address; 168 169 unsigned short pages; 170 unsigned int len, offset; 171 struct scatterlist *sg; 172 173 // Since we only read in one block at a time, we have to create 174 // a bounce buffer and move the data a piece at a time between the 175 // bounce buffer and the actual transfer buffer. 176 177 len = min((unsigned int) sectors, (unsigned int) info->blocksize >> 178 info->smallpageshift) * PAGESIZE; 179 buffer = kmalloc(len, GFP_NOIO); 180 if (buffer == NULL) 181 return USB_STOR_TRANSPORT_ERROR; /* out of memory */ 182 offset = 0; 183 sg = NULL; 184 185 while (sectors>0) { 186 187 /* have we got to end? */ 188 if (lba >= info->max_log_blks) 189 break; 190 191 pba = info->lba_to_pba[lba]; 192 193 // Read as many sectors as possible in this block 194 195 pages = min((unsigned int) sectors << info->smallpageshift, 196 info->blocksize - page); 197 len = pages << info->pageshift; 198 199 US_DEBUGP("Read %02X pages, from PBA %04X" 200 " (LBA %04X) page %02X\n", 201 pages, pba, lba, page); 202 203 if (pba == NOT_ALLOCATED) { 204 /* no pba for this lba, fill with zeroes */ 205 memset (buffer, 0, len); 206 } else { 207 208 address = (pba << info->blockshift) + page; 209 210 command[0] = 0; 211 command[1] = LSB_of(address>>16); 212 command[2] = LSB_of(address>>8); 213 command[3] = LSB_of(address); 214 215 command[4] = 0; 216 command[5] = 0xB0; 217 command[6] = LSB_of(pages << (1 - info->smallpageshift)); 218 command[7] = 0x85; 219 220 /* send command */ 221 result = sddr55_bulk_transport(us, 222 DMA_TO_DEVICE, command, 8); 223 224 US_DEBUGP("Result for send_command in read_data %d\n", 225 result); 226 227 if (result != USB_STOR_XFER_GOOD) { 228 result = USB_STOR_TRANSPORT_ERROR; 229 goto leave; 230 } 231 232 /* read data */ 233 result = sddr55_bulk_transport(us, 234 DMA_FROM_DEVICE, buffer, len); 235 236 if (result != USB_STOR_XFER_GOOD) { 237 result = USB_STOR_TRANSPORT_ERROR; 238 goto leave; 239 } 240 241 /* now read status */ 242 result = sddr55_bulk_transport(us, 243 DMA_FROM_DEVICE, status, 2); 244 245 if (result != USB_STOR_XFER_GOOD) { 246 result = USB_STOR_TRANSPORT_ERROR; 247 goto leave; 248 } 249 250 /* check status for error */ 251 if (status[0] == 0xff && status[1] == 0x4) { 252 set_sense_info (3, 0x11, 0); 253 result = USB_STOR_TRANSPORT_FAILED; 254 goto leave; 255 } 256 } 257 258 // Store the data in the transfer buffer 259 usb_stor_access_xfer_buf(buffer, len, us->srb, 260 &sg, &offset, TO_XFER_BUF); 261 262 page = 0; 263 lba++; 264 sectors -= pages >> info->smallpageshift; 265 } 266 267 result = USB_STOR_TRANSPORT_GOOD; 268 269 leave: 270 kfree(buffer); 271 272 return result; 273 } 274 275 static int sddr55_write_data(struct us_data *us, 276 unsigned int lba, 277 unsigned int page, 278 unsigned short sectors) { 279 280 int result = USB_STOR_TRANSPORT_GOOD; 281 unsigned char *command = us->iobuf; 282 unsigned char *status = us->iobuf; 283 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 284 unsigned char *buffer; 285 286 unsigned int pba; 287 unsigned int new_pba; 288 unsigned long address; 289 290 unsigned short pages; 291 int i; 292 unsigned int len, offset; 293 struct scatterlist *sg; 294 295 /* check if we are allowed to write */ 296 if (info->read_only || info->force_read_only) { 297 set_sense_info (7, 0x27, 0); /* read only */ 298 return USB_STOR_TRANSPORT_FAILED; 299 } 300 301 // Since we only write one block at a time, we have to create 302 // a bounce buffer and move the data a piece at a time between the 303 // bounce buffer and the actual transfer buffer. 304 305 len = min((unsigned int) sectors, (unsigned int) info->blocksize >> 306 info->smallpageshift) * PAGESIZE; 307 buffer = kmalloc(len, GFP_NOIO); 308 if (buffer == NULL) 309 return USB_STOR_TRANSPORT_ERROR; 310 offset = 0; 311 sg = NULL; 312 313 while (sectors > 0) { 314 315 /* have we got to end? */ 316 if (lba >= info->max_log_blks) 317 break; 318 319 pba = info->lba_to_pba[lba]; 320 321 // Write as many sectors as possible in this block 322 323 pages = min((unsigned int) sectors << info->smallpageshift, 324 info->blocksize - page); 325 len = pages << info->pageshift; 326 327 // Get the data from the transfer buffer 328 usb_stor_access_xfer_buf(buffer, len, us->srb, 329 &sg, &offset, FROM_XFER_BUF); 330 331 US_DEBUGP("Write %02X pages, to PBA %04X" 332 " (LBA %04X) page %02X\n", 333 pages, pba, lba, page); 334 335 command[4] = 0; 336 337 if (pba == NOT_ALLOCATED) { 338 /* no pba allocated for this lba, find a free pba to use */ 339 340 int max_pba = (info->max_log_blks / 250 ) * 256; 341 int found_count = 0; 342 int found_pba = -1; 343 344 /* set pba to first block in zone lba is in */ 345 pba = (lba / 1000) * 1024; 346 347 US_DEBUGP("No PBA for LBA %04X\n",lba); 348 349 if (max_pba > 1024) 350 max_pba = 1024; 351 352 /* 353 * Scan through the map looking for an unused block 354 * leave 16 unused blocks at start (or as many as 355 * possible) since the sddr55 seems to reuse a used 356 * block when it shouldn't if we don't leave space. 357 */ 358 for (i = 0; i < max_pba; i++, pba++) { 359 if (info->pba_to_lba[pba] == UNUSED_BLOCK) { 360 found_pba = pba; 361 if (found_count++ > 16) 362 break; 363 } 364 } 365 366 pba = found_pba; 367 368 if (pba == -1) { 369 /* oh dear */ 370 US_DEBUGP("Couldn't find unallocated block\n"); 371 372 set_sense_info (3, 0x31, 0); /* medium error */ 373 result = USB_STOR_TRANSPORT_FAILED; 374 goto leave; 375 } 376 377 US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba); 378 379 /* set writing to unallocated block flag */ 380 command[4] = 0x40; 381 } 382 383 address = (pba << info->blockshift) + page; 384 385 command[1] = LSB_of(address>>16); 386 command[2] = LSB_of(address>>8); 387 command[3] = LSB_of(address); 388 389 /* set the lba into the command, modulo 1000 */ 390 command[0] = LSB_of(lba % 1000); 391 command[6] = MSB_of(lba % 1000); 392 393 command[4] |= LSB_of(pages >> info->smallpageshift); 394 command[5] = 0xB0; 395 command[7] = 0x86; 396 397 /* send command */ 398 result = sddr55_bulk_transport(us, 399 DMA_TO_DEVICE, command, 8); 400 401 if (result != USB_STOR_XFER_GOOD) { 402 US_DEBUGP("Result for send_command in write_data %d\n", 403 result); 404 405 /* set_sense_info is superfluous here? */ 406 set_sense_info (3, 0x3, 0);/* peripheral write error */ 407 result = USB_STOR_TRANSPORT_FAILED; 408 goto leave; 409 } 410 411 /* send the data */ 412 result = sddr55_bulk_transport(us, 413 DMA_TO_DEVICE, buffer, len); 414 415 if (result != USB_STOR_XFER_GOOD) { 416 US_DEBUGP("Result for send_data in write_data %d\n", 417 result); 418 419 /* set_sense_info is superfluous here? */ 420 set_sense_info (3, 0x3, 0);/* peripheral write error */ 421 result = USB_STOR_TRANSPORT_FAILED; 422 goto leave; 423 } 424 425 /* now read status */ 426 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6); 427 428 if (result != USB_STOR_XFER_GOOD) { 429 US_DEBUGP("Result for get_status in write_data %d\n", 430 result); 431 432 /* set_sense_info is superfluous here? */ 433 set_sense_info (3, 0x3, 0);/* peripheral write error */ 434 result = USB_STOR_TRANSPORT_FAILED; 435 goto leave; 436 } 437 438 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) 439 >> info->blockshift; 440 441 /* check status for error */ 442 if (status[0] == 0xff && status[1] == 0x4) { 443 info->pba_to_lba[new_pba] = BAD_BLOCK; 444 445 set_sense_info (3, 0x0c, 0); 446 result = USB_STOR_TRANSPORT_FAILED; 447 goto leave; 448 } 449 450 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n", 451 lba, pba, new_pba); 452 453 /* update the lba<->pba maps, note new_pba might be the same as pba */ 454 info->lba_to_pba[lba] = new_pba; 455 info->pba_to_lba[pba] = UNUSED_BLOCK; 456 457 /* check that new_pba wasn't already being used */ 458 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) { 459 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n", 460 new_pba, info->pba_to_lba[new_pba]); 461 info->fatal_error = 1; 462 set_sense_info (3, 0x31, 0); 463 result = USB_STOR_TRANSPORT_FAILED; 464 goto leave; 465 } 466 467 /* update the pba<->lba maps for new_pba */ 468 info->pba_to_lba[new_pba] = lba % 1000; 469 470 page = 0; 471 lba++; 472 sectors -= pages >> info->smallpageshift; 473 } 474 result = USB_STOR_TRANSPORT_GOOD; 475 476 leave: 477 kfree(buffer); 478 return result; 479 } 480 481 static int sddr55_read_deviceID(struct us_data *us, 482 unsigned char *manufacturerID, 483 unsigned char *deviceID) { 484 485 int result; 486 unsigned char *command = us->iobuf; 487 unsigned char *content = us->iobuf; 488 489 memset(command, 0, 8); 490 command[5] = 0xB0; 491 command[7] = 0x84; 492 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 493 494 US_DEBUGP("Result of send_control for device ID is %d\n", 495 result); 496 497 if (result != USB_STOR_XFER_GOOD) 498 return USB_STOR_TRANSPORT_ERROR; 499 500 result = sddr55_bulk_transport(us, 501 DMA_FROM_DEVICE, content, 4); 502 503 if (result != USB_STOR_XFER_GOOD) 504 return USB_STOR_TRANSPORT_ERROR; 505 506 *manufacturerID = content[0]; 507 *deviceID = content[1]; 508 509 if (content[0] != 0xff) { 510 result = sddr55_bulk_transport(us, 511 DMA_FROM_DEVICE, content, 2); 512 } 513 514 return USB_STOR_TRANSPORT_GOOD; 515 } 516 517 518 int sddr55_reset(struct us_data *us) { 519 return 0; 520 } 521 522 523 static unsigned long sddr55_get_capacity(struct us_data *us) { 524 525 unsigned char uninitialized_var(manufacturerID); 526 unsigned char uninitialized_var(deviceID); 527 int result; 528 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 529 530 US_DEBUGP("Reading capacity...\n"); 531 532 result = sddr55_read_deviceID(us, 533 &manufacturerID, 534 &deviceID); 535 536 US_DEBUGP("Result of read_deviceID is %d\n", 537 result); 538 539 if (result != USB_STOR_XFER_GOOD) 540 return 0; 541 542 US_DEBUGP("Device ID = %02X\n", deviceID); 543 US_DEBUGP("Manuf ID = %02X\n", manufacturerID); 544 545 info->pageshift = 9; 546 info->smallpageshift = 0; 547 info->blocksize = 16; 548 info->blockshift = 4; 549 info->blockmask = 15; 550 551 switch (deviceID) { 552 553 case 0x6e: // 1MB 554 case 0xe8: 555 case 0xec: 556 info->pageshift = 8; 557 info->smallpageshift = 1; 558 return 0x00100000; 559 560 case 0xea: // 2MB 561 case 0x64: 562 info->pageshift = 8; 563 info->smallpageshift = 1; 564 case 0x5d: // 5d is a ROM card with pagesize 512. 565 return 0x00200000; 566 567 case 0xe3: // 4MB 568 case 0xe5: 569 case 0x6b: 570 case 0xd5: 571 return 0x00400000; 572 573 case 0xe6: // 8MB 574 case 0xd6: 575 return 0x00800000; 576 577 case 0x73: // 16MB 578 info->blocksize = 32; 579 info->blockshift = 5; 580 info->blockmask = 31; 581 return 0x01000000; 582 583 case 0x75: // 32MB 584 info->blocksize = 32; 585 info->blockshift = 5; 586 info->blockmask = 31; 587 return 0x02000000; 588 589 case 0x76: // 64MB 590 info->blocksize = 32; 591 info->blockshift = 5; 592 info->blockmask = 31; 593 return 0x04000000; 594 595 case 0x79: // 128MB 596 info->blocksize = 32; 597 info->blockshift = 5; 598 info->blockmask = 31; 599 return 0x08000000; 600 601 default: // unknown 602 return 0; 603 604 } 605 } 606 607 static int sddr55_read_map(struct us_data *us) { 608 609 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra); 610 int numblocks; 611 unsigned char *buffer; 612 unsigned char *command = us->iobuf; 613 int i; 614 unsigned short lba; 615 unsigned short max_lba; 616 int result; 617 618 if (!info->capacity) 619 return -1; 620 621 numblocks = info->capacity >> (info->blockshift + info->pageshift); 622 623 buffer = kmalloc( numblocks * 2, GFP_NOIO ); 624 625 if (!buffer) 626 return -1; 627 628 memset(command, 0, 8); 629 command[5] = 0xB0; 630 command[6] = numblocks * 2 / 256; 631 command[7] = 0x8A; 632 633 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 634 635 if ( result != USB_STOR_XFER_GOOD) { 636 kfree (buffer); 637 return -1; 638 } 639 640 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2); 641 642 if ( result != USB_STOR_XFER_GOOD) { 643 kfree (buffer); 644 return -1; 645 } 646 647 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2); 648 649 if ( result != USB_STOR_XFER_GOOD) { 650 kfree (buffer); 651 return -1; 652 } 653 654 kfree(info->lba_to_pba); 655 kfree(info->pba_to_lba); 656 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO); 657 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO); 658 659 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) { 660 kfree(info->lba_to_pba); 661 kfree(info->pba_to_lba); 662 info->lba_to_pba = NULL; 663 info->pba_to_lba = NULL; 664 kfree(buffer); 665 return -1; 666 } 667 668 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int)); 669 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int)); 670 671 /* set maximum lba */ 672 max_lba = info->max_log_blks; 673 if (max_lba > 1000) 674 max_lba = 1000; 675 676 // Each block is 64 bytes of control data, so block i is located in 677 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11) 678 679 for (i=0; i<numblocks; i++) { 680 int zone = i / 1024; 681 682 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]); 683 684 /* Every 1024 physical blocks ("zone"), the LBA numbers 685 * go back to zero, but are within a higher 686 * block of LBA's. Also, there is a maximum of 687 * 1000 LBA's per zone. In other words, in PBA 688 * 1024-2047 you will find LBA 0-999 which are 689 * really LBA 1000-1999. Yes, this wastes 24 690 * physical blocks per zone. Go figure. 691 * These devices can have blocks go bad, so there 692 * are 24 spare blocks to use when blocks do go bad. 693 */ 694 695 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the 696 * CIS block. (Is this true for cards 8MB or less??) 697 * Record these in the physical to logical map 698 */ 699 700 info->pba_to_lba[i] = lba; 701 702 if (lba >= max_lba) { 703 continue; 704 } 705 706 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED && 707 !info->force_read_only) { 708 printk("sddr55: map inconsistency at LBA %04X\n", lba + zone * 1000); 709 info->force_read_only = 1; 710 } 711 712 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF)) 713 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i); 714 715 info->lba_to_pba[lba + zone * 1000] = i; 716 } 717 718 kfree(buffer); 719 return 0; 720 } 721 722 723 static void sddr55_card_info_destructor(void *extra) { 724 struct sddr55_card_info *info = (struct sddr55_card_info *)extra; 725 726 if (!extra) 727 return; 728 729 kfree(info->lba_to_pba); 730 kfree(info->pba_to_lba); 731 } 732 733 734 /* 735 * Transport for the Sandisk SDDR-55 736 */ 737 int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us) 738 { 739 int result; 740 static unsigned char inquiry_response[8] = { 741 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00 742 }; 743 // write-protected for now, no block descriptor support 744 static unsigned char mode_page_01[20] = { 745 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0, 746 0x01, 0x0A, 747 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 748 }; 749 unsigned char *ptr = us->iobuf; 750 unsigned long capacity; 751 unsigned int lba; 752 unsigned int pba; 753 unsigned int page; 754 unsigned short pages; 755 struct sddr55_card_info *info; 756 757 if (!us->extra) { 758 us->extra = kzalloc( 759 sizeof(struct sddr55_card_info), GFP_NOIO); 760 if (!us->extra) 761 return USB_STOR_TRANSPORT_ERROR; 762 us->extra_destructor = sddr55_card_info_destructor; 763 } 764 765 info = (struct sddr55_card_info *)(us->extra); 766 767 if (srb->cmnd[0] == REQUEST_SENSE) { 768 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]); 769 770 memcpy (ptr, info->sense_data, sizeof info->sense_data); 771 ptr[0] = 0x70; 772 ptr[7] = 11; 773 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb); 774 memset (info->sense_data, 0, sizeof info->sense_data); 775 776 return USB_STOR_TRANSPORT_GOOD; 777 } 778 779 memset (info->sense_data, 0, sizeof info->sense_data); 780 781 /* Dummy up a response for INQUIRY since SDDR55 doesn't 782 respond to INQUIRY commands */ 783 784 if (srb->cmnd[0] == INQUIRY) { 785 memcpy(ptr, inquiry_response, 8); 786 fill_inquiry_response(us, ptr, 36); 787 return USB_STOR_TRANSPORT_GOOD; 788 } 789 790 /* only check card status if the map isn't allocated, ie no card seen yet 791 * or if it's been over half a second since we last accessed it 792 */ 793 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) { 794 795 /* check to see if a card is fitted */ 796 result = sddr55_status (us); 797 if (result) { 798 result = sddr55_status (us); 799 if (!result) { 800 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */ 801 } 802 return USB_STOR_TRANSPORT_FAILED; 803 } 804 } 805 806 /* if we detected a problem with the map when writing, 807 don't allow any more access */ 808 if (info->fatal_error) { 809 810 set_sense_info (3, 0x31, 0); 811 return USB_STOR_TRANSPORT_FAILED; 812 } 813 814 if (srb->cmnd[0] == READ_CAPACITY) { 815 816 capacity = sddr55_get_capacity(us); 817 818 if (!capacity) { 819 set_sense_info (3, 0x30, 0); /* incompatible medium */ 820 return USB_STOR_TRANSPORT_FAILED; 821 } 822 823 info->capacity = capacity; 824 825 /* figure out the maximum logical block number, allowing for 826 * the fact that only 250 out of every 256 are used */ 827 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250; 828 829 /* Last page in the card, adjust as we only use 250 out of 830 * every 256 pages */ 831 capacity = (capacity / 256) * 250; 832 833 capacity /= PAGESIZE; 834 capacity--; 835 836 ((__be32 *) ptr)[0] = cpu_to_be32(capacity); 837 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE); 838 usb_stor_set_xfer_buf(ptr, 8, srb); 839 840 sddr55_read_map(us); 841 842 return USB_STOR_TRANSPORT_GOOD; 843 } 844 845 if (srb->cmnd[0] == MODE_SENSE_10) { 846 847 memcpy(ptr, mode_page_01, sizeof mode_page_01); 848 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0; 849 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb); 850 851 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) { 852 US_DEBUGP( 853 "SDDR55: Dummy up request for mode page 1\n"); 854 return USB_STOR_TRANSPORT_GOOD; 855 856 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) { 857 US_DEBUGP( 858 "SDDR55: Dummy up request for all mode pages\n"); 859 return USB_STOR_TRANSPORT_GOOD; 860 } 861 862 set_sense_info (5, 0x24, 0); /* invalid field in command */ 863 return USB_STOR_TRANSPORT_FAILED; 864 } 865 866 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { 867 868 US_DEBUGP( 869 "SDDR55: %s medium removal. Not that I can do" 870 " anything about it...\n", 871 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow"); 872 873 return USB_STOR_TRANSPORT_GOOD; 874 875 } 876 877 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) { 878 879 page = short_pack(srb->cmnd[3], srb->cmnd[2]); 880 page <<= 16; 881 page |= short_pack(srb->cmnd[5], srb->cmnd[4]); 882 pages = short_pack(srb->cmnd[8], srb->cmnd[7]); 883 884 page <<= info->smallpageshift; 885 886 // convert page to block and page-within-block 887 888 lba = page >> info->blockshift; 889 page = page & info->blockmask; 890 891 // locate physical block corresponding to logical block 892 893 if (lba >= info->max_log_blks) { 894 895 US_DEBUGP("Error: Requested LBA %04X exceeds maximum " 896 "block %04X\n", lba, info->max_log_blks-1); 897 898 set_sense_info (5, 0x24, 0); /* invalid field in command */ 899 900 return USB_STOR_TRANSPORT_FAILED; 901 } 902 903 pba = info->lba_to_pba[lba]; 904 905 if (srb->cmnd[0] == WRITE_10) { 906 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X" 907 " pages %d\n", 908 pba, lba, page, pages); 909 910 return sddr55_write_data(us, lba, page, pages); 911 } else { 912 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X" 913 " pages %d\n", 914 pba, lba, page, pages); 915 916 return sddr55_read_data(us, lba, page, pages); 917 } 918 } 919 920 921 if (srb->cmnd[0] == TEST_UNIT_READY) { 922 return USB_STOR_TRANSPORT_GOOD; 923 } 924 925 if (srb->cmnd[0] == START_STOP) { 926 return USB_STOR_TRANSPORT_GOOD; 927 } 928 929 set_sense_info (5, 0x20, 0); /* illegal command */ 930 931 return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer? 932 } 933 934