drivers/usb/storage/sddr55.c

   1 /*
   2  * Driver for SanDisk SDDR-55 SmartMedia reader
   3  *
   4  * SDDR55 driver v0.1:
   5  *
   6  * First release
   7  *
   8  * Current development and maintenance by:
   9  *   (c) 2002 Simon Munton
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the
  13  * Free Software Foundation; either version 2, or (at your option) any
  14  * later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <linux/jiffies.h>
  27 #include <linux/errno.h>
  28 #include <linux/module.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 "scsiglue.h"
  39
  40 #define DRV_NAME "ums-sddr55"
  41
  42 MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader");
  43 MODULE_AUTHOR("Simon Munton");
  44 MODULE_LICENSE("GPL");
  45
  46 /*
  47  * The table of devices
  48  */
  49 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
  50                     vendorName, productName, useProtocol, useTransport, \
  51                     initFunction, flags) \
  52 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  53   .driver_info = (flags) }
  54
  55 static struct usb_device_id sddr55_usb_ids[] = {
  56 #       include "unusual_sddr55.h"
  57         { }             /* Terminating entry */
  58 };
  59 MODULE_DEVICE_TABLE(usb, sddr55_usb_ids);
  60
  61 #undef UNUSUAL_DEV
  62
  63 /*
  64  * The flags table
  65  */
  66 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
  67                     vendor_name, product_name, use_protocol, use_transport, \
  68                     init_function, Flags) \
  69 { \
  70         .vendorName = vendor_name,      \
  71         .productName = product_name,    \
  72         .useProtocol = use_protocol,    \
  73         .useTransport = use_transport,  \
  74         .initFunction = init_function,  \
  75 }
  76
  77 static struct us_unusual_dev sddr55_unusual_dev_list[] = {
  78 #       include "unusual_sddr55.h"
  79         { }             /* Terminating entry */
  80 };
  81
  82 #undef UNUSUAL_DEV
  83
  84
  85 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
  86 #define LSB_of(s) ((s)&0xFF)
  87 #define MSB_of(s) ((s)>>8)
  88 #define PAGESIZE  512
  89
  90 #define set_sense_info(sk, asc, ascq)   \
  91     do {                                \
  92         info->sense_data[2] = sk;       \
  93         info->sense_data[12] = asc;     \
  94         info->sense_data[13] = ascq;    \
  95         } while (0)
  96
  97
  98 struct sddr55_card_info {
  99         unsigned long   capacity;       /* Size of card in bytes */
 100         int             max_log_blks;   /* maximum number of logical blocks */
 101         int             pageshift;      /* log2 of pagesize */
 102         int             smallpageshift; /* 1 if pagesize == 256 */
 103         int             blocksize;      /* Size of block in pages */
 104         int             blockshift;     /* log2 of blocksize */
 105         int             blockmask;      /* 2^blockshift - 1 */
 106         int             read_only;      /* non zero if card is write protected */
 107         int             force_read_only;        /* non zero if we find a map error*/
 108         int             *lba_to_pba;    /* logical to physical map */
 109         int             *pba_to_lba;    /* physical to logical map */
 110         int             fatal_error;    /* set if we detect something nasty */
 111         unsigned long   last_access;    /* number of jiffies since we last talked to device */
 112         unsigned char   sense_data[18];
 113 };
 114
 115
 116 #define NOT_ALLOCATED           0xffffffff
 117 #define BAD_BLOCK               0xffff
 118 #define CIS_BLOCK               0x400
 119 #define UNUSED_BLOCK            0x3ff
 120
 121 static int
 122 sddr55_bulk_transport(struct us_data *us, int direction,
 123                       unsigned char *data, unsigned int len) {
 124         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 125         unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
 126                         us->recv_bulk_pipe : us->send_bulk_pipe;
 127
 128         if (!len)
 129                 return USB_STOR_XFER_GOOD;
 130         info->last_access = jiffies;
 131         return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
 132 }
 133
 134 /*
 135  * check if card inserted, if there is, update read_only status
 136  * return non zero if no card
 137  */
 138
 139 static int sddr55_status(struct us_data *us)
 140 {
 141         int result;
 142         unsigned char *command = us->iobuf;
 143         unsigned char *status = us->iobuf;
 144         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 145
 146         /* send command */
 147         memset(command, 0, 8);
 148         command[5] = 0xB0;
 149         command[7] = 0x80;
 150         result = sddr55_bulk_transport(us,
 151                 DMA_TO_DEVICE, command, 8);
 152
 153         usb_stor_dbg(us, "Result for send_command in status %d\n", result);
 154
 155         if (result != USB_STOR_XFER_GOOD) {
 156                 set_sense_info (4, 0, 0);       /* hardware error */
 157                 return USB_STOR_TRANSPORT_ERROR;
 158         }
 159
 160         result = sddr55_bulk_transport(us,
 161                 DMA_FROM_DEVICE, status,        4);
 162
 163         /* expect to get short transfer if no card fitted */
 164         if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
 165                 /* had a short transfer, no card inserted, free map memory */
 166                 kfree(info->lba_to_pba);
 167                 kfree(info->pba_to_lba);
 168                 info->lba_to_pba = NULL;
 169                 info->pba_to_lba = NULL;
 170
 171                 info->fatal_error = 0;
 172                 info->force_read_only = 0;
 173
 174                 set_sense_info (2, 0x3a, 0);    /* not ready, medium not present */
 175                 return USB_STOR_TRANSPORT_FAILED;
 176         }
 177
 178         if (result != USB_STOR_XFER_GOOD) {
 179                 set_sense_info (4, 0, 0);       /* hardware error */
 180                 return USB_STOR_TRANSPORT_FAILED;
 181         }
 182
 183         /* check write protect status */
 184         info->read_only = (status[0] & 0x20);
 185
 186         /* now read status */
 187         result = sddr55_bulk_transport(us,
 188                 DMA_FROM_DEVICE, status,        2);
 189
 190         if (result != USB_STOR_XFER_GOOD) {
 191                 set_sense_info (4, 0, 0);       /* hardware error */
 192         }
 193
 194         return (result == USB_STOR_XFER_GOOD ?
 195                         USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
 196 }
 197
 198
 199 static int sddr55_read_data(struct us_data *us,
 200                 unsigned int lba,
 201                 unsigned int page,
 202                 unsigned short sectors) {
 203
 204         int result = USB_STOR_TRANSPORT_GOOD;
 205         unsigned char *command = us->iobuf;
 206         unsigned char *status = us->iobuf;
 207         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 208         unsigned char *buffer;
 209
 210         unsigned int pba;
 211         unsigned long address;
 212
 213         unsigned short pages;
 214         unsigned int len, offset;
 215         struct scatterlist *sg;
 216
 217         // Since we only read in one block at a time, we have to create
 218         // a bounce buffer and move the data a piece at a time between the
 219         // bounce buffer and the actual transfer buffer.
 220
 221         len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
 222                         info->smallpageshift) * PAGESIZE;
 223         buffer = kmalloc(len, GFP_NOIO);
 224         if (buffer == NULL)
 225                 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
 226         offset = 0;
 227         sg = NULL;
 228
 229         while (sectors>0) {
 230
 231                 /* have we got to end? */
 232                 if (lba >= info->max_log_blks)
 233                         break;
 234
 235                 pba = info->lba_to_pba[lba];
 236
 237                 // Read as many sectors as possible in this block
 238
 239                 pages = min((unsigned int) sectors << info->smallpageshift,
 240                                 info->blocksize - page);
 241                 len = pages << info->pageshift;
 242
 243                 usb_stor_dbg(us, "Read %02X pages, from PBA %04X (LBA %04X) page %02X\n",
 244                              pages, pba, lba, page);
 245
 246                 if (pba == NOT_ALLOCATED) {
 247                         /* no pba for this lba, fill with zeroes */
 248                         memset (buffer, 0, len);
 249                 } else {
 250
 251                         address = (pba << info->blockshift) + page;
 252
 253                         command[0] = 0;
 254                         command[1] = LSB_of(address>>16);
 255                         command[2] = LSB_of(address>>8);
 256                         command[3] = LSB_of(address);
 257
 258                         command[4] = 0;
 259                         command[5] = 0xB0;
 260                         command[6] = LSB_of(pages << (1 - info->smallpageshift));
 261                         command[7] = 0x85;
 262
 263                         /* send command */
 264                         result = sddr55_bulk_transport(us,
 265                                 DMA_TO_DEVICE, command, 8);
 266
 267                         usb_stor_dbg(us, "Result for send_command in read_data %d\n",
 268                                      result);
 269
 270                         if (result != USB_STOR_XFER_GOOD) {
 271                                 result = USB_STOR_TRANSPORT_ERROR;
 272                                 goto leave;
 273                         }
 274
 275                         /* read data */
 276                         result = sddr55_bulk_transport(us,
 277                                 DMA_FROM_DEVICE, buffer, len);
 278
 279                         if (result != USB_STOR_XFER_GOOD) {
 280                                 result = USB_STOR_TRANSPORT_ERROR;
 281                                 goto leave;
 282                         }
 283
 284                         /* now read status */
 285                         result = sddr55_bulk_transport(us,
 286                                 DMA_FROM_DEVICE, status, 2);
 287
 288                         if (result != USB_STOR_XFER_GOOD) {
 289                                 result = USB_STOR_TRANSPORT_ERROR;
 290                                 goto leave;
 291                         }
 292
 293                         /* check status for error */
 294                         if (status[0] == 0xff && status[1] == 0x4) {
 295                                 set_sense_info (3, 0x11, 0);
 296                                 result = USB_STOR_TRANSPORT_FAILED;
 297                                 goto leave;
 298                         }
 299                 }
 300
 301                 // Store the data in the transfer buffer
 302                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 303                                 &sg, &offset, TO_XFER_BUF);
 304
 305                 page = 0;
 306                 lba++;
 307                 sectors -= pages >> info->smallpageshift;
 308         }
 309
 310         result = USB_STOR_TRANSPORT_GOOD;
 311
 312 leave:
 313         kfree(buffer);
 314
 315         return result;
 316 }
 317
 318 static int sddr55_write_data(struct us_data *us,
 319                 unsigned int lba,
 320                 unsigned int page,
 321                 unsigned short sectors) {
 322
 323         int result = USB_STOR_TRANSPORT_GOOD;
 324         unsigned char *command = us->iobuf;
 325         unsigned char *status = us->iobuf;
 326         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 327         unsigned char *buffer;
 328
 329         unsigned int pba;
 330         unsigned int new_pba;
 331         unsigned long address;
 332
 333         unsigned short pages;
 334         int i;
 335         unsigned int len, offset;
 336         struct scatterlist *sg;
 337
 338         /* check if we are allowed to write */
 339         if (info->read_only || info->force_read_only) {
 340                 set_sense_info (7, 0x27, 0);    /* read only */
 341                 return USB_STOR_TRANSPORT_FAILED;
 342         }
 343
 344         // Since we only write one block at a time, we have to create
 345         // a bounce buffer and move the data a piece at a time between the
 346         // bounce buffer and the actual transfer buffer.
 347
 348         len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
 349                         info->smallpageshift) * PAGESIZE;
 350         buffer = kmalloc(len, GFP_NOIO);
 351         if (buffer == NULL)
 352                 return USB_STOR_TRANSPORT_ERROR;
 353         offset = 0;
 354         sg = NULL;
 355
 356         while (sectors > 0) {
 357
 358                 /* have we got to end? */
 359                 if (lba >= info->max_log_blks)
 360                         break;
 361
 362                 pba = info->lba_to_pba[lba];
 363
 364                 // Write as many sectors as possible in this block
 365
 366                 pages = min((unsigned int) sectors << info->smallpageshift,
 367                                 info->blocksize - page);
 368                 len = pages << info->pageshift;
 369
 370                 // Get the data from the transfer buffer
 371                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 372                                 &sg, &offset, FROM_XFER_BUF);
 373
 374                 usb_stor_dbg(us, "Write %02X pages, to PBA %04X (LBA %04X) page %02X\n",
 375                              pages, pba, lba, page);
 376
 377                 command[4] = 0;
 378
 379                 if (pba == NOT_ALLOCATED) {
 380                         /* no pba allocated for this lba, find a free pba to use */
 381
 382                         int max_pba = (info->max_log_blks / 250 ) * 256;
 383                         int found_count = 0;
 384                         int found_pba = -1;
 385
 386                         /* set pba to first block in zone lba is in */
 387                         pba = (lba / 1000) * 1024;
 388
 389                         usb_stor_dbg(us, "No PBA for LBA %04X\n", lba);
 390
 391                         if (max_pba > 1024)
 392                                 max_pba = 1024;
 393
 394                         /*
 395                          * Scan through the map looking for an unused block
 396                          * leave 16 unused blocks at start (or as many as
 397                          * possible) since the sddr55 seems to reuse a used
 398                          * block when it shouldn't if we don't leave space.
 399                          */
 400                         for (i = 0; i < max_pba; i++, pba++) {
 401                                 if (info->pba_to_lba[pba] == UNUSED_BLOCK) {
 402                                         found_pba = pba;
 403                                         if (found_count++ > 16)
 404                                                 break;
 405                                 }
 406                         }
 407
 408                         pba = found_pba;
 409
 410                         if (pba == -1) {
 411                                 /* oh dear */
 412                                 usb_stor_dbg(us, "Couldn't find unallocated block\n");
 413
 414                                 set_sense_info (3, 0x31, 0);    /* medium error */
 415                                 result = USB_STOR_TRANSPORT_FAILED;
 416                                 goto leave;
 417                         }
 418
 419                         usb_stor_dbg(us, "Allocating PBA %04X for LBA %04X\n",
 420                                      pba, lba);
 421
 422                         /* set writing to unallocated block flag */
 423                         command[4] = 0x40;
 424                 }
 425
 426                 address = (pba << info->blockshift) + page;
 427
 428                 command[1] = LSB_of(address>>16);
 429                 command[2] = LSB_of(address>>8);
 430                 command[3] = LSB_of(address);
 431
 432                 /* set the lba into the command, modulo 1000 */
 433                 command[0] = LSB_of(lba % 1000);
 434                 command[6] = MSB_of(lba % 1000);
 435
 436                 command[4] |= LSB_of(pages >> info->smallpageshift);
 437                 command[5] = 0xB0;
 438                 command[7] = 0x86;
 439
 440                 /* send command */
 441                 result = sddr55_bulk_transport(us,
 442                         DMA_TO_DEVICE, command, 8);
 443
 444                 if (result != USB_STOR_XFER_GOOD) {
 445                         usb_stor_dbg(us, "Result for send_command in write_data %d\n",
 446                                      result);
 447
 448                         /* set_sense_info is superfluous here? */
 449                         set_sense_info (3, 0x3, 0);/* peripheral write error */
 450                         result = USB_STOR_TRANSPORT_FAILED;
 451                         goto leave;
 452                 }
 453
 454                 /* send the data */
 455                 result = sddr55_bulk_transport(us,
 456                         DMA_TO_DEVICE, buffer, len);
 457
 458                 if (result != USB_STOR_XFER_GOOD) {
 459                         usb_stor_dbg(us, "Result for send_data in write_data %d\n",
 460                                      result);
 461
 462                         /* set_sense_info is superfluous here? */
 463                         set_sense_info (3, 0x3, 0);/* peripheral write error */
 464                         result = USB_STOR_TRANSPORT_FAILED;
 465                         goto leave;
 466                 }
 467
 468                 /* now read status */
 469                 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
 470
 471                 if (result != USB_STOR_XFER_GOOD) {
 472                         usb_stor_dbg(us, "Result for get_status in write_data %d\n",
 473                                      result);
 474
 475                         /* set_sense_info is superfluous here? */
 476                         set_sense_info (3, 0x3, 0);/* peripheral write error */
 477                         result = USB_STOR_TRANSPORT_FAILED;
 478                         goto leave;
 479                 }
 480
 481                 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
 482                                                   >> info->blockshift;
 483
 484                 /* check status for error */
 485                 if (status[0] == 0xff && status[1] == 0x4) {
 486                         info->pba_to_lba[new_pba] = BAD_BLOCK;
 487
 488                         set_sense_info (3, 0x0c, 0);
 489                         result = USB_STOR_TRANSPORT_FAILED;
 490                         goto leave;
 491                 }
 492
 493                 usb_stor_dbg(us, "Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
 494                              lba, pba, new_pba);
 495
 496                 /* update the lba<->pba maps, note new_pba might be the same as pba */
 497                 info->lba_to_pba[lba] = new_pba;
 498                 info->pba_to_lba[pba] = UNUSED_BLOCK;
 499
 500                 /* check that new_pba wasn't already being used */
 501                 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
 502                         printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
 503                                 new_pba, info->pba_to_lba[new_pba]);
 504                         info->fatal_error = 1;
 505                         set_sense_info (3, 0x31, 0);
 506                         result = USB_STOR_TRANSPORT_FAILED;
 507                         goto leave;
 508                 }
 509
 510                 /* update the pba<->lba maps for new_pba */
 511                 info->pba_to_lba[new_pba] = lba % 1000;
 512
 513                 page = 0;
 514                 lba++;
 515                 sectors -= pages >> info->smallpageshift;
 516         }
 517         result = USB_STOR_TRANSPORT_GOOD;
 518
 519  leave:
 520         kfree(buffer);
 521         return result;
 522 }
 523
 524 static int sddr55_read_deviceID(struct us_data *us,
 525                 unsigned char *manufacturerID,
 526                 unsigned char *deviceID) {
 527
 528         int result;
 529         unsigned char *command = us->iobuf;
 530         unsigned char *content = us->iobuf;
 531
 532         memset(command, 0, 8);
 533         command[5] = 0xB0;
 534         command[7] = 0x84;
 535         result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
 536
 537         usb_stor_dbg(us, "Result of send_control for device ID is %d\n",
 538                      result);
 539
 540         if (result != USB_STOR_XFER_GOOD)
 541                 return USB_STOR_TRANSPORT_ERROR;
 542
 543         result = sddr55_bulk_transport(us,
 544                 DMA_FROM_DEVICE, content, 4);
 545
 546         if (result != USB_STOR_XFER_GOOD)
 547                 return USB_STOR_TRANSPORT_ERROR;
 548
 549         *manufacturerID = content[0];
 550         *deviceID = content[1];
 551
 552         if (content[0] != 0xff) {
 553                 result = sddr55_bulk_transport(us,
 554                         DMA_FROM_DEVICE, content, 2);
 555         }
 556
 557         return USB_STOR_TRANSPORT_GOOD;
 558 }
 559
 560
 561 static int sddr55_reset(struct us_data *us)
 562 {
 563         return 0;
 564 }
 565
 566
 567 static unsigned long sddr55_get_capacity(struct us_data *us) {
 568
 569         unsigned char uninitialized_var(manufacturerID);
 570         unsigned char uninitialized_var(deviceID);
 571         int result;
 572         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 573
 574         usb_stor_dbg(us, "Reading capacity...\n");
 575
 576         result = sddr55_read_deviceID(us,
 577                 &manufacturerID,
 578                 &deviceID);
 579
 580         usb_stor_dbg(us, "Result of read_deviceID is %d\n", result);
 581
 582         if (result != USB_STOR_XFER_GOOD)
 583                 return 0;
 584
 585         usb_stor_dbg(us, "Device ID = %02X\n", deviceID);
 586         usb_stor_dbg(us, "Manuf  ID = %02X\n", manufacturerID);
 587
 588         info->pageshift = 9;
 589         info->smallpageshift = 0;
 590         info->blocksize = 16;
 591         info->blockshift = 4;
 592         info->blockmask = 15;
 593
 594         switch (deviceID) {
 595
 596         case 0x6e: // 1MB
 597         case 0xe8:
 598         case 0xec:
 599                 info->pageshift = 8;
 600                 info->smallpageshift = 1;
 601                 return 0x00100000;
 602
 603         case 0xea: // 2MB
 604         case 0x64:
 605                 info->pageshift = 8;
 606                 info->smallpageshift = 1;
 607         case 0x5d: // 5d is a ROM card with pagesize 512.
 608                 return 0x00200000;
 609
 610         case 0xe3: // 4MB
 611         case 0xe5:
 612         case 0x6b:
 613         case 0xd5:
 614                 return 0x00400000;
 615
 616         case 0xe6: // 8MB
 617         case 0xd6:
 618                 return 0x00800000;
 619
 620         case 0x73: // 16MB
 621                 info->blocksize = 32;
 622                 info->blockshift = 5;
 623                 info->blockmask = 31;
 624                 return 0x01000000;
 625
 626         case 0x75: // 32MB
 627                 info->blocksize = 32;
 628                 info->blockshift = 5;
 629                 info->blockmask = 31;
 630                 return 0x02000000;
 631
 632         case 0x76: // 64MB
 633                 info->blocksize = 32;
 634                 info->blockshift = 5;
 635                 info->blockmask = 31;
 636                 return 0x04000000;
 637
 638         case 0x79: // 128MB
 639                 info->blocksize = 32;
 640                 info->blockshift = 5;
 641                 info->blockmask = 31;
 642                 return 0x08000000;
 643
 644         default: // unknown
 645                 return 0;
 646
 647         }
 648 }
 649
 650 static int sddr55_read_map(struct us_data *us) {
 651
 652         struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra);
 653         int numblocks;
 654         unsigned char *buffer;
 655         unsigned char *command = us->iobuf;
 656         int i;
 657         unsigned short lba;
 658         unsigned short max_lba;
 659         int result;
 660
 661         if (!info->capacity)
 662                 return -1;
 663
 664         numblocks = info->capacity >> (info->blockshift + info->pageshift);
 665
 666         buffer = kmalloc( numblocks * 2, GFP_NOIO );
 667
 668         if (!buffer)
 669                 return -1;
 670
 671         memset(command, 0, 8);
 672         command[5] = 0xB0;
 673         command[6] = numblocks * 2 / 256;
 674         command[7] = 0x8A;
 675
 676         result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
 677
 678         if ( result != USB_STOR_XFER_GOOD) {
 679                 kfree (buffer);
 680                 return -1;
 681         }
 682
 683         result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
 684
 685         if ( result != USB_STOR_XFER_GOOD) {
 686                 kfree (buffer);
 687                 return -1;
 688         }
 689
 690         result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
 691
 692         if ( result != USB_STOR_XFER_GOOD) {
 693                 kfree (buffer);
 694                 return -1;
 695         }
 696
 697         kfree(info->lba_to_pba);
 698         kfree(info->pba_to_lba);
 699         info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
 700         info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
 701
 702         if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
 703                 kfree(info->lba_to_pba);
 704                 kfree(info->pba_to_lba);
 705                 info->lba_to_pba = NULL;
 706                 info->pba_to_lba = NULL;
 707                 kfree(buffer);
 708                 return -1;
 709         }
 710
 711         memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
 712         memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
 713
 714         /* set maximum lba */
 715         max_lba = info->max_log_blks;
 716         if (max_lba > 1000)
 717                 max_lba = 1000;
 718
 719         /*
 720          * Each block is 64 bytes of control data, so block i is located in
 721          * scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
 722          */
 723
 724         for (i=0; i<numblocks; i++) {
 725                 int zone = i / 1024;
 726
 727                 lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
 728
 729                         /*
 730                          * Every 1024 physical blocks ("zone"), the LBA numbers
 731                          * go back to zero, but are within a higher
 732                          * block of LBA's. Also, there is a maximum of
 733                          * 1000 LBA's per zone. In other words, in PBA
 734                          * 1024-2047 you will find LBA 0-999 which are
 735                          * really LBA 1000-1999. Yes, this wastes 24
 736                          * physical blocks per zone. Go figure.
 737                          * These devices can have blocks go bad, so there
 738                          * are 24 spare blocks to use when blocks do go bad.
 739                          */
 740
 741                         /*
 742                          * SDDR55 returns 0xffff for a bad block, and 0x400 for the
 743                          * CIS block. (Is this true for cards 8MB or less??)
 744                          * Record these in the physical to logical map
 745                          */
 746
 747                 info->pba_to_lba[i] = lba;
 748
 749                 if (lba >= max_lba) {
 750                         continue;
 751                 }
 752
 753                 if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
 754                     !info->force_read_only) {
 755                         printk(KERN_WARNING
 756                                "sddr55: map inconsistency at LBA %04X\n",
 757                                lba + zone * 1000);
 758                         info->force_read_only = 1;
 759                 }
 760
 761                 if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
 762                         usb_stor_dbg(us, "LBA %04X <-> PBA %04X\n", lba, i);
 763
 764                 info->lba_to_pba[lba + zone * 1000] = i;
 765         }
 766
 767         kfree(buffer);
 768         return 0;
 769 }
 770
 771
 772 static void sddr55_card_info_destructor(void *extra) {
 773         struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
 774
 775         if (!extra)
 776                 return;
 777
 778         kfree(info->lba_to_pba);
 779         kfree(info->pba_to_lba);
 780 }
 781
 782
 783 /*
 784  * Transport for the Sandisk SDDR-55
 785  */
 786 static int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
 787 {
 788         int result;
 789         static unsigned char inquiry_response[8] = {
 790                 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
 791         };
 792         // write-protected for now, no block descriptor support
 793         static unsigned char mode_page_01[20] = {
 794                 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
 795                 0x01, 0x0A,
 796                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 797         };
 798         unsigned char *ptr = us->iobuf;
 799         unsigned long capacity;
 800         unsigned int lba;
 801         unsigned int pba;
 802         unsigned int page;
 803         unsigned short pages;
 804         struct sddr55_card_info *info;
 805
 806         if (!us->extra) {
 807                 us->extra = kzalloc(
 808                         sizeof(struct sddr55_card_info), GFP_NOIO);
 809                 if (!us->extra)
 810                         return USB_STOR_TRANSPORT_ERROR;
 811                 us->extra_destructor = sddr55_card_info_destructor;
 812         }
 813
 814         info = (struct sddr55_card_info *)(us->extra);
 815
 816         if (srb->cmnd[0] == REQUEST_SENSE) {
 817                 usb_stor_dbg(us, "request sense %02x/%02x/%02x\n",
 818                              info->sense_data[2],
 819                              info->sense_data[12],
 820                              info->sense_data[13]);
 821
 822                 memcpy (ptr, info->sense_data, sizeof info->sense_data);
 823                 ptr[0] = 0x70;
 824                 ptr[7] = 11;
 825                 usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
 826                 memset (info->sense_data, 0, sizeof info->sense_data);
 827
 828                 return USB_STOR_TRANSPORT_GOOD;
 829         }
 830
 831         memset (info->sense_data, 0, sizeof info->sense_data);
 832
 833         /*
 834          * Dummy up a response for INQUIRY since SDDR55 doesn't
 835          * respond to INQUIRY commands
 836          */
 837
 838         if (srb->cmnd[0] == INQUIRY) {
 839                 memcpy(ptr, inquiry_response, 8);
 840                 fill_inquiry_response(us, ptr, 36);
 841                 return USB_STOR_TRANSPORT_GOOD;
 842         }
 843
 844         /*
 845          * only check card status if the map isn't allocated, ie no card seen yet
 846          * or if it's been over half a second since we last accessed it
 847          */
 848         if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
 849
 850                 /* check to see if a card is fitted */
 851                 result = sddr55_status (us);
 852                 if (result) {
 853                         result = sddr55_status (us);
 854                         if (!result) {
 855                         set_sense_info (6, 0x28, 0);    /* new media, set unit attention, not ready to ready */
 856                         }
 857                         return USB_STOR_TRANSPORT_FAILED;
 858                 }
 859         }
 860
 861         /*
 862          * if we detected a problem with the map when writing,
 863          * don't allow any more access
 864          */
 865         if (info->fatal_error) {
 866
 867                 set_sense_info (3, 0x31, 0);
 868                 return USB_STOR_TRANSPORT_FAILED;
 869         }
 870
 871         if (srb->cmnd[0] == READ_CAPACITY) {
 872
 873                 capacity = sddr55_get_capacity(us);
 874
 875                 if (!capacity) {
 876                         set_sense_info (3, 0x30, 0); /* incompatible medium */
 877                         return USB_STOR_TRANSPORT_FAILED;
 878                 }
 879
 880                 info->capacity = capacity;
 881
 882                 /*
 883                  * figure out the maximum logical block number, allowing for
 884                  * the fact that only 250 out of every 256 are used
 885                  */
 886                 info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
 887
 888                 /*
 889                  * Last page in the card, adjust as we only use 250 out of
 890                  * every 256 pages
 891                  */
 892                 capacity = (capacity / 256) * 250;
 893
 894                 capacity /= PAGESIZE;
 895                 capacity--;
 896
 897                 ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
 898                 ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
 899                 usb_stor_set_xfer_buf(ptr, 8, srb);
 900
 901                 sddr55_read_map(us);
 902
 903                 return USB_STOR_TRANSPORT_GOOD;
 904         }
 905
 906         if (srb->cmnd[0] == MODE_SENSE_10) {
 907
 908                 memcpy(ptr, mode_page_01, sizeof mode_page_01);
 909                 ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
 910                 usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
 911
 912                 if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
 913                         usb_stor_dbg(us, "Dummy up request for mode page 1\n");
 914                         return USB_STOR_TRANSPORT_GOOD;
 915
 916                 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
 917                         usb_stor_dbg(us, "Dummy up request for all mode pages\n");
 918                         return USB_STOR_TRANSPORT_GOOD;
 919                 }
 920
 921                 set_sense_info (5, 0x24, 0);    /* invalid field in command */
 922                 return USB_STOR_TRANSPORT_FAILED;
 923         }
 924
 925         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 926
 927                 usb_stor_dbg(us, "%s medium removal. Not that I can do anything about it...\n",
 928                              (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
 929
 930                 return USB_STOR_TRANSPORT_GOOD;
 931
 932         }
 933
 934         if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
 935
 936                 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
 937                 page <<= 16;
 938                 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
 939                 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
 940
 941                 page <<= info->smallpageshift;
 942
 943                 // convert page to block and page-within-block
 944
 945                 lba = page >> info->blockshift;
 946                 page = page & info->blockmask;
 947
 948                 // locate physical block corresponding to logical block
 949
 950                 if (lba >= info->max_log_blks) {
 951
 952                         usb_stor_dbg(us, "Error: Requested LBA %04X exceeds maximum block %04X\n",
 953                                      lba, info->max_log_blks - 1);
 954
 955                         set_sense_info (5, 0x24, 0);    /* invalid field in command */
 956
 957                         return USB_STOR_TRANSPORT_FAILED;
 958                 }
 959
 960                 pba = info->lba_to_pba[lba];
 961
 962                 if (srb->cmnd[0] == WRITE_10) {
 963                         usb_stor_dbg(us, "WRITE_10: write block %04X (LBA %04X) page %01X pages %d\n",
 964                                      pba, lba, page, pages);
 965
 966                         return sddr55_write_data(us, lba, page, pages);
 967                 } else {
 968                         usb_stor_dbg(us, "READ_10: read block %04X (LBA %04X) page %01X pages %d\n",
 969                                      pba, lba, page, pages);
 970
 971                         return sddr55_read_data(us, lba, page, pages);
 972                 }
 973         }
 974
 975
 976         if (srb->cmnd[0] == TEST_UNIT_READY) {
 977                 return USB_STOR_TRANSPORT_GOOD;
 978         }
 979
 980         if (srb->cmnd[0] == START_STOP) {
 981                 return USB_STOR_TRANSPORT_GOOD;
 982         }
 983
 984         set_sense_info (5, 0x20, 0);    /* illegal command */
 985
 986         return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
 987 }
 988
 989 static struct scsi_host_template sddr55_host_template;
 990
 991 static int sddr55_probe(struct usb_interface *intf,
 992                          const struct usb_device_id *id)
 993 {
 994         struct us_data *us;
 995         int result;
 996
 997         result = usb_stor_probe1(&us, intf, id,
 998                         (id - sddr55_usb_ids) + sddr55_unusual_dev_list,
 999                         &sddr55_host_template);
1000         if (result)
1001                 return result;
1002
1003         us->transport_name = "SDDR55";
1004         us->transport = sddr55_transport;
1005         us->transport_reset = sddr55_reset;
1006         us->max_lun = 0;
1007
1008         result = usb_stor_probe2(us);
1009         return result;
1010 }
1011
1012 static struct usb_driver sddr55_driver = {
1013         .name =         DRV_NAME,
1014         .probe =        sddr55_probe,
1015         .disconnect =   usb_stor_disconnect,
1016         .suspend =      usb_stor_suspend,
1017         .resume =       usb_stor_resume,
1018         .reset_resume = usb_stor_reset_resume,
1019         .pre_reset =    usb_stor_pre_reset,
1020         .post_reset =   usb_stor_post_reset,
1021         .id_table =     sddr55_usb_ids,
1022         .soft_unbind =  1,
1023         .no_dynamic_id = 1,
1024 };
1025
1026 module_usb_stor_driver(sddr55_driver, sddr55_host_template, DRV_NAME);