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