drivers/usb/storage/sddr55.c

   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
  38 MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader");
  39 MODULE_AUTHOR("Simon Munton");
  40 MODULE_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)|(USB_US_TYPE_STOR<<24) }
  50
  51 struct usb_device_id sddr55_usb_ids[] = {
  52 #       include "unusual_sddr55.h"
  53         { }             /* Terminating entry */
  54 };
  55 MODULE_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
  73 static 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
  94 struct 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
 117 static int
 118 sddr55_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
 134 static 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         US_DEBUGP("Result for send_command in status %d\n",
 149                 result);
 150
 151         if (result != USB_STOR_XFER_GOOD) {
 152                 set_sense_info (4, 0, 0);       /* hardware error */
 153                 return USB_STOR_TRANSPORT_ERROR;
 154         }
 155
 156         result = sddr55_bulk_transport(us,
 157                 DMA_FROM_DEVICE, status,        4);
 158
 159         /* expect to get short transfer if no card fitted */
 160         if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
 161                 /* had a short transfer, no card inserted, free map memory */
 162                 kfree(info->lba_to_pba);
 163                 kfree(info->pba_to_lba);
 164                 info->lba_to_pba = NULL;
 165                 info->pba_to_lba = NULL;
 166
 167                 info->fatal_error = 0;
 168                 info->force_read_only = 0;
 169
 170                 set_sense_info (2, 0x3a, 0);    /* not ready, medium not present */
 171                 return USB_STOR_TRANSPORT_FAILED;
 172         }
 173
 174         if (result != USB_STOR_XFER_GOOD) {
 175                 set_sense_info (4, 0, 0);       /* hardware error */
 176                 return USB_STOR_TRANSPORT_FAILED;
 177         }
 178
 179         /* check write protect status */
 180         info->read_only = (status[0] & 0x20);
 181
 182         /* now read status */
 183         result = sddr55_bulk_transport(us,
 184                 DMA_FROM_DEVICE, status,        2);
 185
 186         if (result != USB_STOR_XFER_GOOD) {
 187                 set_sense_info (4, 0, 0);       /* hardware error */
 188         }
 189
 190         return (result == USB_STOR_XFER_GOOD ?
 191                         USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
 192 }
 193
 194
 195 static int sddr55_read_data(struct us_data *us,
 196                 unsigned int lba,
 197                 unsigned int page,
 198                 unsigned short sectors) {
 199
 200         int result = USB_STOR_TRANSPORT_GOOD;
 201         unsigned char *command = us->iobuf;
 202         unsigned char *status = us->iobuf;
 203         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 204         unsigned char *buffer;
 205
 206         unsigned int pba;
 207         unsigned long address;
 208
 209         unsigned short pages;
 210         unsigned int len, offset;
 211         struct scatterlist *sg;
 212
 213         // Since we only read in one block at a time, we have to create
 214         // a bounce buffer and move the data a piece at a time between the
 215         // bounce buffer and the actual transfer buffer.
 216
 217         len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
 218                         info->smallpageshift) * PAGESIZE;
 219         buffer = kmalloc(len, GFP_NOIO);
 220         if (buffer == NULL)
 221                 return USB_STOR_TRANSPORT_ERROR; /* out of memory */
 222         offset = 0;
 223         sg = NULL;
 224
 225         while (sectors>0) {
 226
 227                 /* have we got to end? */
 228                 if (lba >= info->max_log_blks)
 229                         break;
 230
 231                 pba = info->lba_to_pba[lba];
 232
 233                 // Read as many sectors as possible in this block
 234
 235                 pages = min((unsigned int) sectors << info->smallpageshift,
 236                                 info->blocksize - page);
 237                 len = pages << info->pageshift;
 238
 239                 US_DEBUGP("Read %02X pages, from PBA %04X"
 240                         " (LBA %04X) page %02X\n",
 241                         pages, pba, lba, page);
 242
 243                 if (pba == NOT_ALLOCATED) {
 244                         /* no pba for this lba, fill with zeroes */
 245                         memset (buffer, 0, len);
 246                 } else {
 247
 248                         address = (pba << info->blockshift) + page;
 249
 250                         command[0] = 0;
 251                         command[1] = LSB_of(address>>16);
 252                         command[2] = LSB_of(address>>8);
 253                         command[3] = LSB_of(address);
 254
 255                         command[4] = 0;
 256                         command[5] = 0xB0;
 257                         command[6] = LSB_of(pages << (1 - info->smallpageshift));
 258                         command[7] = 0x85;
 259
 260                         /* send command */
 261                         result = sddr55_bulk_transport(us,
 262                                 DMA_TO_DEVICE, command, 8);
 263
 264                         US_DEBUGP("Result for send_command in read_data %d\n",
 265                                 result);
 266
 267                         if (result != USB_STOR_XFER_GOOD) {
 268                                 result = USB_STOR_TRANSPORT_ERROR;
 269                                 goto leave;
 270                         }
 271
 272                         /* read data */
 273                         result = sddr55_bulk_transport(us,
 274                                 DMA_FROM_DEVICE, buffer, len);
 275
 276                         if (result != USB_STOR_XFER_GOOD) {
 277                                 result = USB_STOR_TRANSPORT_ERROR;
 278                                 goto leave;
 279                         }
 280
 281                         /* now read status */
 282                         result = sddr55_bulk_transport(us,
 283                                 DMA_FROM_DEVICE, status, 2);
 284
 285                         if (result != USB_STOR_XFER_GOOD) {
 286                                 result = USB_STOR_TRANSPORT_ERROR;
 287                                 goto leave;
 288                         }
 289
 290                         /* check status for error */
 291                         if (status[0] == 0xff && status[1] == 0x4) {
 292                                 set_sense_info (3, 0x11, 0);
 293                                 result = USB_STOR_TRANSPORT_FAILED;
 294                                 goto leave;
 295                         }
 296                 }
 297
 298                 // Store the data in the transfer buffer
 299                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 300                                 &sg, &offset, TO_XFER_BUF);
 301
 302                 page = 0;
 303                 lba++;
 304                 sectors -= pages >> info->smallpageshift;
 305         }
 306
 307         result = USB_STOR_TRANSPORT_GOOD;
 308
 309 leave:
 310         kfree(buffer);
 311
 312         return result;
 313 }
 314
 315 static int sddr55_write_data(struct us_data *us,
 316                 unsigned int lba,
 317                 unsigned int page,
 318                 unsigned short sectors) {
 319
 320         int result = USB_STOR_TRANSPORT_GOOD;
 321         unsigned char *command = us->iobuf;
 322         unsigned char *status = us->iobuf;
 323         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 324         unsigned char *buffer;
 325
 326         unsigned int pba;
 327         unsigned int new_pba;
 328         unsigned long address;
 329
 330         unsigned short pages;
 331         int i;
 332         unsigned int len, offset;
 333         struct scatterlist *sg;
 334
 335         /* check if we are allowed to write */
 336         if (info->read_only || info->force_read_only) {
 337                 set_sense_info (7, 0x27, 0);    /* read only */
 338                 return USB_STOR_TRANSPORT_FAILED;
 339         }
 340
 341         // Since we only write one block at a time, we have to create
 342         // a bounce buffer and move the data a piece at a time between the
 343         // bounce buffer and the actual transfer buffer.
 344
 345         len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
 346                         info->smallpageshift) * PAGESIZE;
 347         buffer = kmalloc(len, GFP_NOIO);
 348         if (buffer == NULL)
 349                 return USB_STOR_TRANSPORT_ERROR;
 350         offset = 0;
 351         sg = NULL;
 352
 353         while (sectors > 0) {
 354
 355                 /* have we got to end? */
 356                 if (lba >= info->max_log_blks)
 357                         break;
 358
 359                 pba = info->lba_to_pba[lba];
 360
 361                 // Write as many sectors as possible in this block
 362
 363                 pages = min((unsigned int) sectors << info->smallpageshift,
 364                                 info->blocksize - page);
 365                 len = pages << info->pageshift;
 366
 367                 // Get the data from the transfer buffer
 368                 usb_stor_access_xfer_buf(buffer, len, us->srb,
 369                                 &sg, &offset, FROM_XFER_BUF);
 370
 371                 US_DEBUGP("Write %02X pages, to PBA %04X"
 372                         " (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                         US_DEBUGP("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                                 US_DEBUGP("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                         US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba);
 418
 419                         /* set writing to unallocated block flag */
 420                         command[4] = 0x40;
 421                 }
 422
 423                 address = (pba << info->blockshift) + page;
 424
 425                 command[1] = LSB_of(address>>16);
 426                 command[2] = LSB_of(address>>8);
 427                 command[3] = LSB_of(address);
 428
 429                 /* set the lba into the command, modulo 1000 */
 430                 command[0] = LSB_of(lba % 1000);
 431                 command[6] = MSB_of(lba % 1000);
 432
 433                 command[4] |= LSB_of(pages >> info->smallpageshift);
 434                 command[5] = 0xB0;
 435                 command[7] = 0x86;
 436
 437                 /* send command */
 438                 result = sddr55_bulk_transport(us,
 439                         DMA_TO_DEVICE, command, 8);
 440
 441                 if (result != USB_STOR_XFER_GOOD) {
 442                         US_DEBUGP("Result for send_command in write_data %d\n",
 443                         result);
 444
 445                         /* set_sense_info is superfluous here? */
 446                         set_sense_info (3, 0x3, 0);/* peripheral write error */
 447                         result = USB_STOR_TRANSPORT_FAILED;
 448                         goto leave;
 449                 }
 450
 451                 /* send the data */
 452                 result = sddr55_bulk_transport(us,
 453                         DMA_TO_DEVICE, buffer, len);
 454
 455                 if (result != USB_STOR_XFER_GOOD) {
 456                         US_DEBUGP("Result for send_data in write_data %d\n",
 457                                   result);
 458
 459                         /* set_sense_info is superfluous here? */
 460                         set_sense_info (3, 0x3, 0);/* peripheral write error */
 461                         result = USB_STOR_TRANSPORT_FAILED;
 462                         goto leave;
 463                 }
 464
 465                 /* now read status */
 466                 result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
 467
 468                 if (result != USB_STOR_XFER_GOOD) {
 469                         US_DEBUGP("Result for get_status in write_data %d\n",
 470                                   result);
 471
 472                         /* set_sense_info is superfluous here? */
 473                         set_sense_info (3, 0x3, 0);/* peripheral write error */
 474                         result = USB_STOR_TRANSPORT_FAILED;
 475                         goto leave;
 476                 }
 477
 478                 new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
 479                                                   >> info->blockshift;
 480
 481                 /* check status for error */
 482                 if (status[0] == 0xff && status[1] == 0x4) {
 483                         info->pba_to_lba[new_pba] = BAD_BLOCK;
 484
 485                         set_sense_info (3, 0x0c, 0);
 486                         result = USB_STOR_TRANSPORT_FAILED;
 487                         goto leave;
 488                 }
 489
 490                 US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
 491                         lba, pba, new_pba);
 492
 493                 /* update the lba<->pba maps, note new_pba might be the same as pba */
 494                 info->lba_to_pba[lba] = new_pba;
 495                 info->pba_to_lba[pba] = UNUSED_BLOCK;
 496
 497                 /* check that new_pba wasn't already being used */
 498                 if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
 499                         printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
 500                                 new_pba, info->pba_to_lba[new_pba]);
 501                         info->fatal_error = 1;
 502                         set_sense_info (3, 0x31, 0);
 503                         result = USB_STOR_TRANSPORT_FAILED;
 504                         goto leave;
 505                 }
 506
 507                 /* update the pba<->lba maps for new_pba */
 508                 info->pba_to_lba[new_pba] = lba % 1000;
 509
 510                 page = 0;
 511                 lba++;
 512                 sectors -= pages >> info->smallpageshift;
 513         }
 514         result = USB_STOR_TRANSPORT_GOOD;
 515
 516  leave:
 517         kfree(buffer);
 518         return result;
 519 }
 520
 521 static int sddr55_read_deviceID(struct us_data *us,
 522                 unsigned char *manufacturerID,
 523                 unsigned char *deviceID) {
 524
 525         int result;
 526         unsigned char *command = us->iobuf;
 527         unsigned char *content = us->iobuf;
 528
 529         memset(command, 0, 8);
 530         command[5] = 0xB0;
 531         command[7] = 0x84;
 532         result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
 533
 534         US_DEBUGP("Result of send_control for device ID is %d\n",
 535                 result);
 536
 537         if (result != USB_STOR_XFER_GOOD)
 538                 return USB_STOR_TRANSPORT_ERROR;
 539
 540         result = sddr55_bulk_transport(us,
 541                 DMA_FROM_DEVICE, content, 4);
 542
 543         if (result != USB_STOR_XFER_GOOD)
 544                 return USB_STOR_TRANSPORT_ERROR;
 545
 546         *manufacturerID = content[0];
 547         *deviceID = content[1];
 548
 549         if (content[0] != 0xff) {
 550                 result = sddr55_bulk_transport(us,
 551                         DMA_FROM_DEVICE, content, 2);
 552         }
 553
 554         return USB_STOR_TRANSPORT_GOOD;
 555 }
 556
 557
 558 static int sddr55_reset(struct us_data *us)
 559 {
 560         return 0;
 561 }
 562
 563
 564 static unsigned long sddr55_get_capacity(struct us_data *us) {
 565
 566         unsigned char uninitialized_var(manufacturerID);
 567         unsigned char uninitialized_var(deviceID);
 568         int result;
 569         struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
 570
 571         US_DEBUGP("Reading capacity...\n");
 572
 573         result = sddr55_read_deviceID(us,
 574                 &manufacturerID,
 575                 &deviceID);
 576
 577         US_DEBUGP("Result of read_deviceID is %d\n",
 578                 result);
 579
 580         if (result != USB_STOR_XFER_GOOD)
 581                 return 0;
 582
 583         US_DEBUGP("Device ID = %02X\n", deviceID);
 584         US_DEBUGP("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                         US_DEBUGP("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                 US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], 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                         US_DEBUGP(
 896                           "SDDR55: Dummy up request for mode page 1\n");
 897                         return USB_STOR_TRANSPORT_GOOD;
 898
 899                 } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
 900                         US_DEBUGP(
 901                           "SDDR55: Dummy up request for all mode pages\n");
 902                         return USB_STOR_TRANSPORT_GOOD;
 903                 }
 904
 905                 set_sense_info (5, 0x24, 0);    /* invalid field in command */
 906                 return USB_STOR_TRANSPORT_FAILED;
 907         }
 908
 909         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
 910
 911                 US_DEBUGP(
 912                   "SDDR55: %s medium removal. Not that I can do"
 913                   " anything about it...\n",
 914                   (srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
 915
 916                 return USB_STOR_TRANSPORT_GOOD;
 917
 918         }
 919
 920         if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
 921
 922                 page = short_pack(srb->cmnd[3], srb->cmnd[2]);
 923                 page <<= 16;
 924                 page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
 925                 pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
 926
 927                 page <<= info->smallpageshift;
 928
 929                 // convert page to block and page-within-block
 930
 931                 lba = page >> info->blockshift;
 932                 page = page & info->blockmask;
 933
 934                 // locate physical block corresponding to logical block
 935
 936                 if (lba >= info->max_log_blks) {
 937
 938                         US_DEBUGP("Error: Requested LBA %04X exceeds maximum "
 939                           "block %04X\n", lba, info->max_log_blks-1);
 940
 941                         set_sense_info (5, 0x24, 0);    /* invalid field in command */
 942
 943                         return USB_STOR_TRANSPORT_FAILED;
 944                 }
 945
 946                 pba = info->lba_to_pba[lba];
 947
 948                 if (srb->cmnd[0] == WRITE_10) {
 949                         US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X"
 950                                 " pages %d\n",
 951                                 pba, lba, page, pages);
 952
 953                         return sddr55_write_data(us, lba, page, pages);
 954                 } else {
 955                         US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
 956                                 " pages %d\n",
 957                                 pba, lba, page, pages);
 958
 959                         return sddr55_read_data(us, lba, page, pages);
 960                 }
 961         }
 962
 963
 964         if (srb->cmnd[0] == TEST_UNIT_READY) {
 965                 return USB_STOR_TRANSPORT_GOOD;
 966         }
 967
 968         if (srb->cmnd[0] == START_STOP) {
 969                 return USB_STOR_TRANSPORT_GOOD;
 970         }
 971
 972         set_sense_info (5, 0x20, 0);    /* illegal command */
 973
 974         return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
 975 }
 976
 977
 978 static int sddr55_probe(struct usb_interface *intf,
 979                          const struct usb_device_id *id)
 980 {
 981         struct us_data *us;
 982         int result;
 983
 984         result = usb_stor_probe1(&us, intf, id,
 985                         (id - sddr55_usb_ids) + sddr55_unusual_dev_list);
 986         if (result)
 987                 return result;
 988
 989         us->transport_name = "SDDR55";
 990         us->transport = sddr55_transport;
 991         us->transport_reset = sddr55_reset;
 992         us->max_lun = 0;
 993
 994         result = usb_stor_probe2(us);
 995         return result;
 996 }
 997
 998 static struct usb_driver sddr55_driver = {
 999         .name =         "ums-sddr55",
1000         .probe =        sddr55_probe,
1001         .disconnect =   usb_stor_disconnect,
1002         .suspend =      usb_stor_suspend,
1003         .resume =       usb_stor_resume,
1004         .reset_resume = usb_stor_reset_resume,
1005         .pre_reset =    usb_stor_pre_reset,
1006         .post_reset =   usb_stor_post_reset,
1007         .id_table =     sddr55_usb_ids,
1008         .soft_unbind =  1,
1009 };
1010
1011 static int __init sddr55_init(void)
1012 {
1013         return usb_register(&sddr55_driver);
1014 }
1015
1016 static void __exit sddr55_exit(void)
1017 {
1018         usb_deregister(&sddr55_driver);
1019 }
1020
1021 module_init(sddr55_init);
1022 module_exit(sddr55_exit);