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