1/* Driver for SanDisk SDDR-55 SmartMedia reader 2 * 3 * $Id: sddr55.c,v 1.1.1.1 2007/08/03 18:53:02 Exp $ 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 54struct 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 77static int 78sddr55_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 94static 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 155static 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, index, offset; 171 172 // Since we only read in one block at a time, we have to create 173 // a bounce buffer and move the data a piece at a time between the 174 // bounce buffer and the actual transfer buffer. 175 176 len = min((unsigned int) sectors, (unsigned int) info->blocksize >> 177 info->smallpageshift) * PAGESIZE; 178 buffer = kmalloc(len, GFP_NOIO); 179 if (buffer == NULL) 180 return USB_STOR_TRANSPORT_ERROR; /* out of memory */ 181 index = offset = 0; 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 &index, &offset, TO_XFER_BUF); 259 260 page = 0; 261 lba++; 262 sectors -= pages >> info->smallpageshift; 263 } 264 265 result = USB_STOR_TRANSPORT_GOOD; 266 267leave: 268 kfree(buffer); 269 270 return result; 271} 272 273static 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, index, offset; 291 292 /* check if we are allowed to write */ 293 if (info->read_only || info->force_read_only) { 294 set_sense_info (7, 0x27, 0); /* read only */ 295 return USB_STOR_TRANSPORT_FAILED; 296 } 297 298 // Since we only write one block at a time, we have to create 299 // a bounce buffer and move the data a piece at a time between the 300 // bounce buffer and the actual transfer buffer. 301 302 len = min((unsigned int) sectors, (unsigned int) info->blocksize >> 303 info->smallpageshift) * PAGESIZE; 304 buffer = kmalloc(len, GFP_NOIO); 305 if (buffer == NULL) 306 return USB_STOR_TRANSPORT_ERROR; 307 index = offset = 0; 308 309 while (sectors > 0) { 310 311 /* have we got to end? */ 312 if (lba >= info->max_log_blks) 313 break; 314 315 pba = info->lba_to_pba[lba]; 316 317 // Write as many sectors as possible in this block 318 319 pages = min((unsigned int) sectors << info->smallpageshift, 320 info->blocksize - page); 321 len = pages << info->pageshift; 322 323 // Get the data from the transfer buffer 324 usb_stor_access_xfer_buf(buffer, len, us->srb, 325 &index, &offset, FROM_XFER_BUF); 326 327 US_DEBUGP("Write %02X pages, to PBA %04X" 328 " (LBA %04X) page %02X\n", 329 pages, pba, lba, page); 330 331 command[4] = 0; 332 333 if (pba == NOT_ALLOCATED) { 334 /* no pba allocated for this lba, find a free pba to use */ 335 336 int max_pba = (info->max_log_blks / 250 ) * 256; 337 int found_count = 0; 338 int found_pba = -1; 339 340 /* set pba to first block in zone lba is in */ 341 pba = (lba / 1000) * 1024; 342 343 US_DEBUGP("No PBA for LBA %04X\n",lba); 344 345 if (max_pba > 1024) 346 max_pba = 1024; 347 348 /* 349 * Scan through the map looking for an unused block 350 * leave 16 unused blocks at start (or as many as 351 * possible) since the sddr55 seems to reuse a used 352 * block when it shouldn't if we don't leave space. 353 */ 354 for (i = 0; i < max_pba; i++, pba++) { 355 if (info->pba_to_lba[pba] == UNUSED_BLOCK) { 356 found_pba = pba; 357 if (found_count++ > 16) 358 break; 359 } 360 } 361 362 pba = found_pba; 363 364 if (pba == -1) { 365 /* oh dear */ 366 US_DEBUGP("Couldn't find unallocated block\n"); 367 368 set_sense_info (3, 0x31, 0); /* medium error */ 369 result = USB_STOR_TRANSPORT_FAILED; 370 goto leave; 371 } 372 373 US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba); 374 375 /* set writing to unallocated block flag */ 376 command[4] = 0x40; 377 } 378 379 address = (pba << info->blockshift) + page; 380 381 command[1] = LSB_of(address>>16); 382 command[2] = LSB_of(address>>8); 383 command[3] = LSB_of(address); 384 385 /* set the lba into the command, modulo 1000 */ 386 command[0] = LSB_of(lba % 1000); 387 command[6] = MSB_of(lba % 1000); 388 389 command[4] |= LSB_of(pages >> info->smallpageshift); 390 command[5] = 0xB0; 391 command[7] = 0x86; 392 393 /* send command */ 394 result = sddr55_bulk_transport(us, 395 DMA_TO_DEVICE, command, 8); 396 397 if (result != USB_STOR_XFER_GOOD) { 398 US_DEBUGP("Result for send_command in write_data %d\n", 399 result); 400 401 /* set_sense_info is superfluous here? */ 402 set_sense_info (3, 0x3, 0);/* peripheral write error */ 403 result = USB_STOR_TRANSPORT_FAILED; 404 goto leave; 405 } 406 407 /* send the data */ 408 result = sddr55_bulk_transport(us, 409 DMA_TO_DEVICE, buffer, len); 410 411 if (result != USB_STOR_XFER_GOOD) { 412 US_DEBUGP("Result for send_data in write_data %d\n", 413 result); 414 415 /* set_sense_info is superfluous here? */ 416 set_sense_info (3, 0x3, 0);/* peripheral write error */ 417 result = USB_STOR_TRANSPORT_FAILED; 418 goto leave; 419 } 420 421 /* now read status */ 422 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6); 423 424 if (result != USB_STOR_XFER_GOOD) { 425 US_DEBUGP("Result for get_status in write_data %d\n", 426 result); 427 428 /* set_sense_info is superfluous here? */ 429 set_sense_info (3, 0x3, 0);/* peripheral write error */ 430 result = USB_STOR_TRANSPORT_FAILED; 431 goto leave; 432 } 433 434 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) 435 >> info->blockshift; 436 437 /* check status for error */ 438 if (status[0] == 0xff && status[1] == 0x4) { 439 info->pba_to_lba[new_pba] = BAD_BLOCK; 440 441 set_sense_info (3, 0x0c, 0); 442 result = USB_STOR_TRANSPORT_FAILED; 443 goto leave; 444 } 445 446 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n", 447 lba, pba, new_pba); 448 449 /* update the lba<->pba maps, note new_pba might be the same as pba */ 450 info->lba_to_pba[lba] = new_pba; 451 info->pba_to_lba[pba] = UNUSED_BLOCK; 452 453 /* check that new_pba wasn't already being used */ 454 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) { 455 printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n", 456 new_pba, info->pba_to_lba[new_pba]); 457 info->fatal_error = 1; 458 set_sense_info (3, 0x31, 0); 459 result = USB_STOR_TRANSPORT_FAILED; 460 goto leave; 461 } 462 463 /* update the pba<->lba maps for new_pba */ 464 info->pba_to_lba[new_pba] = lba % 1000; 465 466 page = 0; 467 lba++; 468 sectors -= pages >> info->smallpageshift; 469 } 470 result = USB_STOR_TRANSPORT_GOOD; 471 472 leave: 473 kfree(buffer); 474 return result; 475} 476 477static int sddr55_read_deviceID(struct us_data *us, 478 unsigned char *manufacturerID, 479 unsigned char *deviceID) { 480 481 int result; 482 unsigned char *command = us->iobuf; 483 unsigned char *content = us->iobuf; 484 485 memset(command, 0, 8); 486 command[5] = 0xB0; 487 command[7] = 0x84; 488 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 489 490 US_DEBUGP("Result of send_control for device ID is %d\n", 491 result); 492 493 if (result != USB_STOR_XFER_GOOD) 494 return USB_STOR_TRANSPORT_ERROR; 495 496 result = sddr55_bulk_transport(us, 497 DMA_FROM_DEVICE, content, 4); 498 499 if (result != USB_STOR_XFER_GOOD) 500 return USB_STOR_TRANSPORT_ERROR; 501 502 *manufacturerID = content[0]; 503 *deviceID = content[1]; 504 505 if (content[0] != 0xff) { 506 result = sddr55_bulk_transport(us, 507 DMA_FROM_DEVICE, content, 2); 508 } 509 510 return USB_STOR_TRANSPORT_GOOD; 511} 512 513 514int sddr55_reset(struct us_data *us) { 515 return 0; 516} 517 518 519static unsigned long sddr55_get_capacity(struct us_data *us) { 520 521 unsigned char manufacturerID; 522 unsigned char deviceID; 523 int result; 524 struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; 525 526 US_DEBUGP("Reading capacity...\n"); 527 528 result = sddr55_read_deviceID(us, 529 &manufacturerID, 530 &deviceID); 531 532 US_DEBUGP("Result of read_deviceID is %d\n", 533 result); 534 535 if (result != USB_STOR_XFER_GOOD) 536 return 0; 537 538 US_DEBUGP("Device ID = %02X\n", deviceID); 539 US_DEBUGP("Manuf ID = %02X\n", manufacturerID); 540 541 info->pageshift = 9; 542 info->smallpageshift = 0; 543 info->blocksize = 16; 544 info->blockshift = 4; 545 info->blockmask = 15; 546 547 switch (deviceID) { 548 549 case 0x6e: // 1MB 550 case 0xe8: 551 case 0xec: 552 info->pageshift = 8; 553 info->smallpageshift = 1; 554 return 0x00100000; 555 556 case 0xea: // 2MB 557 case 0x64: 558 info->pageshift = 8; 559 info->smallpageshift = 1; 560 case 0x5d: // 5d is a ROM card with pagesize 512. 561 return 0x00200000; 562 563 case 0xe3: // 4MB 564 case 0xe5: 565 case 0x6b: 566 case 0xd5: 567 return 0x00400000; 568 569 case 0xe6: // 8MB 570 case 0xd6: 571 return 0x00800000; 572 573 case 0x73: // 16MB 574 info->blocksize = 32; 575 info->blockshift = 5; 576 info->blockmask = 31; 577 return 0x01000000; 578 579 case 0x75: // 32MB 580 info->blocksize = 32; 581 info->blockshift = 5; 582 info->blockmask = 31; 583 return 0x02000000; 584 585 case 0x76: // 64MB 586 info->blocksize = 32; 587 info->blockshift = 5; 588 info->blockmask = 31; 589 return 0x04000000; 590 591 case 0x79: // 128MB 592 info->blocksize = 32; 593 info->blockshift = 5; 594 info->blockmask = 31; 595 return 0x08000000; 596 597 default: // unknown 598 return 0; 599 600 } 601} 602 603static int sddr55_read_map(struct us_data *us) { 604 605 struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra); 606 int numblocks; 607 unsigned char *buffer; 608 unsigned char *command = us->iobuf; 609 int i; 610 unsigned short lba; 611 unsigned short max_lba; 612 int result; 613 614 if (!info->capacity) 615 return -1; 616 617 numblocks = info->capacity >> (info->blockshift + info->pageshift); 618 619 buffer = kmalloc( numblocks * 2, GFP_NOIO ); 620 621 if (!buffer) 622 return -1; 623 624 memset(command, 0, 8); 625 command[5] = 0xB0; 626 command[6] = numblocks * 2 / 256; 627 command[7] = 0x8A; 628 629 result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); 630 631 if ( result != USB_STOR_XFER_GOOD) { 632 kfree (buffer); 633 return -1; 634 } 635 636 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2); 637 638 if ( result != USB_STOR_XFER_GOOD) { 639 kfree (buffer); 640 return -1; 641 } 642 643 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2); 644 645 if ( result != USB_STOR_XFER_GOOD) { 646 kfree (buffer); 647 return -1; 648 } 649 650 kfree(info->lba_to_pba); 651 kfree(info->pba_to_lba); 652 info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO); 653 info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO); 654 655 if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) { 656 kfree(info->lba_to_pba); 657 kfree(info->pba_to_lba); 658 info->lba_to_pba = NULL; 659 info->pba_to_lba = NULL; 660 kfree(buffer); 661 return -1; 662 } 663 664 memset(info->lba_to_pba, 0xff, numblocks*sizeof(int)); 665 memset(info->pba_to_lba, 0xff, numblocks*sizeof(int)); 666 667 /* set maximum lba */ 668 max_lba = info->max_log_blks; 669 if (max_lba > 1000) 670 max_lba = 1000; 671 672 // Each block is 64 bytes of control data, so block i is located in 673 // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11) 674 675 for (i=0; i<numblocks; i++) { 676 int zone = i / 1024; 677 678 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]); 679 680 /* Every 1024 physical blocks ("zone"), the LBA numbers 681 * go back to zero, but are within a higher 682 * block of LBA's. Also, there is a maximum of 683 * 1000 LBA's per zone. In other words, in PBA 684 * 1024-2047 you will find LBA 0-999 which are 685 * really LBA 1000-1999. Yes, this wastes 24 686 * physical blocks per zone. Go figure. 687 * These devices can have blocks go bad, so there 688 * are 24 spare blocks to use when blocks do go bad. 689 */ 690 691 /* SDDR55 returns 0xffff for a bad block, and 0x400 for the 692 * CIS block. (Is this true for cards 8MB or less??) 693 * Record these in the physical to logical map 694 */ 695 696 info->pba_to_lba[i] = lba; 697 698 if (lba >= max_lba) { 699 continue; 700 } 701 702 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED && 703 !info->force_read_only) { 704 printk("sddr55: map inconsistency at LBA %04X\n", lba + zone * 1000); 705 info->force_read_only = 1; 706 } 707 708 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF)) 709 US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i); 710 711 info->lba_to_pba[lba + zone * 1000] = i; 712 } 713 714 kfree(buffer); 715 return 0; 716} 717 718 719static void sddr55_card_info_destructor(void *extra) { 720 struct sddr55_card_info *info = (struct sddr55_card_info *)extra; 721 722 if (!extra) 723 return; 724 725 kfree(info->lba_to_pba); 726 kfree(info->pba_to_lba); 727} 728 729 730/* 731 * Transport for the Sandisk SDDR-55 732 */ 733int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us) 734{ 735 int result; 736 static unsigned char inquiry_response[8] = { 737 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00 738 }; 739 // write-protected for now, no block descriptor support 740 static unsigned char mode_page_01[20] = { 741 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0, 742 0x01, 0x0A, 743 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 744 }; 745 unsigned char *ptr = us->iobuf; 746 unsigned long capacity; 747 unsigned int lba; 748 unsigned int pba; 749 unsigned int page; 750 unsigned short pages; 751 struct sddr55_card_info *info; 752 753 if (!us->extra) { 754 us->extra = kzalloc( 755 sizeof(struct sddr55_card_info), GFP_NOIO); 756 if (!us->extra) 757 return USB_STOR_TRANSPORT_ERROR; 758 us->extra_destructor = sddr55_card_info_destructor; 759 } 760 761 info = (struct sddr55_card_info *)(us->extra); 762 763 if (srb->cmnd[0] == REQUEST_SENSE) { 764 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]); 765 766 memcpy (ptr, info->sense_data, sizeof info->sense_data); 767 ptr[0] = 0x70; 768 ptr[7] = 11; 769 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb); 770 memset (info->sense_data, 0, sizeof info->sense_data); 771 772 return USB_STOR_TRANSPORT_GOOD; 773 } 774 775 memset (info->sense_data, 0, sizeof info->sense_data); 776 777 /* Dummy up a response for INQUIRY since SDDR55 doesn't 778 respond to INQUIRY commands */ 779 780 if (srb->cmnd[0] == INQUIRY) { 781 memcpy(ptr, inquiry_response, 8); 782 fill_inquiry_response(us, ptr, 36); 783 return USB_STOR_TRANSPORT_GOOD; 784 } 785 786 /* only check card status if the map isn't allocated, ie no card seen yet 787 * or if it's been over half a second since we last accessed it 788 */ 789 if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) { 790 791 /* check to see if a card is fitted */ 792 result = sddr55_status (us); 793 if (result) { 794 result = sddr55_status (us); 795 if (!result) { 796 set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */ 797 } 798 return USB_STOR_TRANSPORT_FAILED; 799 } 800 } 801 802 /* if we detected a problem with the map when writing, 803 don't allow any more access */ 804 if (info->fatal_error) { 805 806 set_sense_info (3, 0x31, 0); 807 return USB_STOR_TRANSPORT_FAILED; 808 } 809 810 if (srb->cmnd[0] == READ_CAPACITY) { 811 812 capacity = sddr55_get_capacity(us); 813 814 if (!capacity) { 815 set_sense_info (3, 0x30, 0); /* incompatible medium */ 816 return USB_STOR_TRANSPORT_FAILED; 817 } 818 819 info->capacity = capacity; 820 821 /* figure out the maximum logical block number, allowing for 822 * the fact that only 250 out of every 256 are used */ 823 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250; 824 825 /* Last page in the card, adjust as we only use 250 out of 826 * every 256 pages */ 827 capacity = (capacity / 256) * 250; 828 829 capacity /= PAGESIZE; 830 capacity--; 831 832 ((__be32 *) ptr)[0] = cpu_to_be32(capacity); 833 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE); 834 usb_stor_set_xfer_buf(ptr, 8, srb); 835 836 sddr55_read_map(us); 837 838 return USB_STOR_TRANSPORT_GOOD; 839 } 840 841 if (srb->cmnd[0] == MODE_SENSE_10) { 842 843 memcpy(ptr, mode_page_01, sizeof mode_page_01); 844 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0; 845 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb); 846 847 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) { 848 US_DEBUGP( 849 "SDDR55: Dummy up request for mode page 1\n"); 850 return USB_STOR_TRANSPORT_GOOD; 851 852 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) { 853 US_DEBUGP( 854 "SDDR55: Dummy up request for all mode pages\n"); 855 return USB_STOR_TRANSPORT_GOOD; 856 } 857 858 set_sense_info (5, 0x24, 0); /* invalid field in command */ 859 return USB_STOR_TRANSPORT_FAILED; 860 } 861 862 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { 863 864 US_DEBUGP( 865 "SDDR55: %s medium removal. Not that I can do" 866 " anything about it...\n", 867 (srb->cmnd[4]&0x03) ? "Prevent" : "Allow"); 868 869 return USB_STOR_TRANSPORT_GOOD; 870 871 } 872 873 if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) { 874 875 page = short_pack(srb->cmnd[3], srb->cmnd[2]); 876 page <<= 16; 877 page |= short_pack(srb->cmnd[5], srb->cmnd[4]); 878 pages = short_pack(srb->cmnd[8], srb->cmnd[7]); 879 880 page <<= info->smallpageshift; 881 882 // convert page to block and page-within-block 883 884 lba = page >> info->blockshift; 885 page = page & info->blockmask; 886 887 // locate physical block corresponding to logical block 888 889 if (lba >= info->max_log_blks) { 890 891 US_DEBUGP("Error: Requested LBA %04X exceeds maximum " 892 "block %04X\n", lba, info->max_log_blks-1); 893 894 set_sense_info (5, 0x24, 0); /* invalid field in command */ 895 896 return USB_STOR_TRANSPORT_FAILED; 897 } 898 899 pba = info->lba_to_pba[lba]; 900 901 if (srb->cmnd[0] == WRITE_10) { 902 US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X" 903 " pages %d\n", 904 pba, lba, page, pages); 905 906 return sddr55_write_data(us, lba, page, pages); 907 } else { 908 US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X" 909 " pages %d\n", 910 pba, lba, page, pages); 911 912 return sddr55_read_data(us, lba, page, pages); 913 } 914 } 915 916 917 if (srb->cmnd[0] == TEST_UNIT_READY) { 918 return USB_STOR_TRANSPORT_GOOD; 919 } 920 921 if (srb->cmnd[0] == START_STOP) { 922 return USB_STOR_TRANSPORT_GOOD; 923 } 924 925 set_sense_info (5, 0x20, 0); /* illegal command */ 926 927 return USB_STOR_TRANSPORT_FAILED; 928} 929