drivers/memstick/core/mspro_block.c

   1 /*
   2  *  Sony MemoryStick Pro storage support
   3  *
   4  *  Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Special thanks to Carlos Corbacho for providing various MemoryStick cards
  11  * that made this driver possible.
  12  *
  13  */
  14
  15 #include <linux/blkdev.h>
  16 #include <linux/idr.h>
  17 #include <linux/hdreg.h>
  18 #include <linux/kthread.h>
  19 #include <linux/delay.h>
  20 #include <linux/memstick.h>
  21
  22 #define DRIVER_NAME "mspro_block"
  23
  24 static int major;
  25 module_param(major, int, 0644);
  26
  27 #define MSPRO_BLOCK_MAX_SEGS  32
  28 #define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
  29
  30 #define MSPRO_BLOCK_SIGNATURE        0xa5c3
  31 #define MSPRO_BLOCK_MAX_ATTRIBUTES   41
  32
  33 #define MSPRO_BLOCK_PART_SHIFT 3
  34
  35 enum {
  36         MSPRO_BLOCK_ID_SYSINFO         = 0x10,
  37         MSPRO_BLOCK_ID_MODELNAME       = 0x15,
  38         MSPRO_BLOCK_ID_MBR             = 0x20,
  39         MSPRO_BLOCK_ID_PBR16           = 0x21,
  40         MSPRO_BLOCK_ID_PBR32           = 0x22,
  41         MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
  42         MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
  43         MSPRO_BLOCK_ID_DEVINFO         = 0x30
  44 };
  45
  46 struct mspro_sys_attr {
  47         size_t                  size;
  48         void                    *data;
  49         unsigned char           id;
  50         char                    name[32];
  51         struct device_attribute dev_attr;
  52 };
  53
  54 struct mspro_attr_entry {
  55         __be32 address;
  56         __be32 size;
  57         unsigned char id;
  58         unsigned char reserved[3];
  59 } __attribute__((packed));
  60
  61 struct mspro_attribute {
  62         __be16 signature;
  63         unsigned short          version;
  64         unsigned char           count;
  65         unsigned char           reserved[11];
  66         struct mspro_attr_entry entries[];
  67 } __attribute__((packed));
  68
  69 struct mspro_sys_info {
  70         unsigned char  class;
  71         unsigned char  reserved0;
  72         __be16 block_size;
  73         __be16 block_count;
  74         __be16 user_block_count;
  75         __be16 page_size;
  76         unsigned char  reserved1[2];
  77         unsigned char  assembly_date[8];
  78         __be32 serial_number;
  79         unsigned char  assembly_maker_code;
  80         unsigned char  assembly_model_code[3];
  81         __be16 memory_maker_code;
  82         __be16 memory_model_code;
  83         unsigned char  reserved2[4];
  84         unsigned char  vcc;
  85         unsigned char  vpp;
  86         __be16 controller_number;
  87         __be16 controller_function;
  88         __be16 start_sector;
  89         __be16 unit_size;
  90         unsigned char  ms_sub_class;
  91         unsigned char  reserved3[4];
  92         unsigned char  interface_type;
  93         __be16 controller_code;
  94         unsigned char  format_type;
  95         unsigned char  reserved4;
  96         unsigned char  device_type;
  97         unsigned char  reserved5[7];
  98         unsigned char  mspro_id[16];
  99         unsigned char  reserved6[16];
 100 } __attribute__((packed));
 101
 102 struct mspro_mbr {
 103         unsigned char boot_partition;
 104         unsigned char start_head;
 105         unsigned char start_sector;
 106         unsigned char start_cylinder;
 107         unsigned char partition_type;
 108         unsigned char end_head;
 109         unsigned char end_sector;
 110         unsigned char end_cylinder;
 111         unsigned int  start_sectors;
 112         unsigned int  sectors_per_partition;
 113 } __attribute__((packed));
 114
 115 struct mspro_specfile {
 116         char           name[8];
 117         char           ext[3];
 118         unsigned char  attr;
 119         unsigned char  reserved[10];
 120         unsigned short time;
 121         unsigned short date;
 122         unsigned short cluster;
 123         unsigned int   size;
 124 } __attribute__((packed));
 125
 126 struct mspro_devinfo {
 127         __be16 cylinders;
 128         __be16 heads;
 129         __be16 bytes_per_track;
 130         __be16 bytes_per_sector;
 131         __be16 sectors_per_track;
 132         unsigned char  reserved[6];
 133 } __attribute__((packed));
 134
 135 struct mspro_block_data {
 136         struct memstick_dev   *card;
 137         unsigned int          usage_count;
 138         unsigned int          caps;
 139         struct gendisk        *disk;
 140         struct request_queue  *queue;
 141         struct request        *block_req;
 142         spinlock_t            q_lock;
 143
 144         unsigned short        page_size;
 145         unsigned short        cylinders;
 146         unsigned short        heads;
 147         unsigned short        sectors_per_track;
 148
 149         unsigned char         system;
 150         unsigned char         read_only:1,
 151                               eject:1,
 152                               has_request:1,
 153                               data_dir:1,
 154                               active:1;
 155         unsigned char         transfer_cmd;
 156
 157         int                   (*mrq_handler)(struct memstick_dev *card,
 158                                              struct memstick_request **mrq);
 159
 160         struct attribute_group attr_group;
 161
 162         struct scatterlist    req_sg[MSPRO_BLOCK_MAX_SEGS];
 163         unsigned int          seg_count;
 164         unsigned int          current_seg;
 165         unsigned int          current_page;
 166 };
 167
 168 static DEFINE_IDR(mspro_block_disk_idr);
 169 static DEFINE_MUTEX(mspro_block_disk_lock);
 170
 171 static int mspro_block_complete_req(struct memstick_dev *card, int error);
 172
 173 /*** Block device ***/
 174
 175 static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
 176 {
 177         struct gendisk *disk = bdev->bd_disk;
 178         struct mspro_block_data *msb = disk->private_data;
 179         int rc = -ENXIO;
 180
 181         mutex_lock(&mspro_block_disk_lock);
 182
 183         if (msb && msb->card) {
 184                 msb->usage_count++;
 185                 if ((mode & FMODE_WRITE) && msb->read_only)
 186                         rc = -EROFS;
 187                 else
 188                         rc = 0;
 189         }
 190
 191         mutex_unlock(&mspro_block_disk_lock);
 192
 193         return rc;
 194 }
 195
 196
 197 static int mspro_block_disk_release(struct gendisk *disk)
 198 {
 199         struct mspro_block_data *msb = disk->private_data;
 200         int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
 201
 202         mutex_lock(&mspro_block_disk_lock);
 203
 204         if (msb) {
 205                 if (msb->usage_count)
 206                         msb->usage_count--;
 207
 208                 if (!msb->usage_count) {
 209                         kfree(msb);
 210                         disk->private_data = NULL;
 211                         idr_remove(&mspro_block_disk_idr, disk_id);
 212                         put_disk(disk);
 213                 }
 214         }
 215
 216         mutex_unlock(&mspro_block_disk_lock);
 217
 218         return 0;
 219 }
 220
 221 static int mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
 222 {
 223         return mspro_block_disk_release(disk);
 224 }
 225
 226 static int mspro_block_bd_getgeo(struct block_device *bdev,
 227                                  struct hd_geometry *geo)
 228 {
 229         struct mspro_block_data *msb = bdev->bd_disk->private_data;
 230
 231         geo->heads = msb->heads;
 232         geo->sectors = msb->sectors_per_track;
 233         geo->cylinders = msb->cylinders;
 234
 235         return 0;
 236 }
 237
 238 static const struct block_device_operations ms_block_bdops = {
 239         .open    = mspro_block_bd_open,
 240         .release = mspro_block_bd_release,
 241         .getgeo  = mspro_block_bd_getgeo,
 242         .owner   = THIS_MODULE
 243 };
 244
 245 /*** Information ***/
 246
 247 static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
 248 {
 249         struct device_attribute *dev_attr
 250                 = container_of(attr, struct device_attribute, attr);
 251         return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
 252 }
 253
 254 static const char *mspro_block_attr_name(unsigned char tag)
 255 {
 256         switch (tag) {
 257         case MSPRO_BLOCK_ID_SYSINFO:
 258                 return "attr_sysinfo";
 259         case MSPRO_BLOCK_ID_MODELNAME:
 260                 return "attr_modelname";
 261         case MSPRO_BLOCK_ID_MBR:
 262                 return "attr_mbr";
 263         case MSPRO_BLOCK_ID_PBR16:
 264                 return "attr_pbr16";
 265         case MSPRO_BLOCK_ID_PBR32:
 266                 return "attr_pbr32";
 267         case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 268                 return "attr_specfilevalues1";
 269         case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 270                 return "attr_specfilevalues2";
 271         case MSPRO_BLOCK_ID_DEVINFO:
 272                 return "attr_devinfo";
 273         default:
 274                 return NULL;
 275         };
 276 }
 277
 278 typedef ssize_t (*sysfs_show_t)(struct device *dev,
 279                                 struct device_attribute *attr,
 280                                 char *buffer);
 281
 282 static ssize_t mspro_block_attr_show_default(struct device *dev,
 283                                              struct device_attribute *attr,
 284                                              char *buffer)
 285 {
 286         struct mspro_sys_attr *s_attr = container_of(attr,
 287                                                      struct mspro_sys_attr,
 288                                                      dev_attr);
 289
 290         ssize_t cnt, rc = 0;
 291
 292         for (cnt = 0; cnt < s_attr->size; cnt++) {
 293                 if (cnt && !(cnt % 16)) {
 294                         if (PAGE_SIZE - rc)
 295                                 buffer[rc++] = '\n';
 296                 }
 297
 298                 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
 299                                 ((unsigned char *)s_attr->data)[cnt]);
 300         }
 301         return rc;
 302 }
 303
 304 static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
 305                                              struct device_attribute *attr,
 306                                              char *buffer)
 307 {
 308         struct mspro_sys_attr *x_attr = container_of(attr,
 309                                                      struct mspro_sys_attr,
 310                                                      dev_attr);
 311         struct mspro_sys_info *x_sys = x_attr->data;
 312         ssize_t rc = 0;
 313         int date_tz = 0, date_tz_f = 0;
 314
 315         if (x_sys->assembly_date[0] > 0x80U) {
 316                 date_tz = (~x_sys->assembly_date[0]) + 1;
 317                 date_tz_f = date_tz & 3;
 318                 date_tz >>= 2;
 319                 date_tz = -date_tz;
 320                 date_tz_f *= 15;
 321         } else if (x_sys->assembly_date[0] < 0x80U) {
 322                 date_tz = x_sys->assembly_date[0];
 323                 date_tz_f = date_tz & 3;
 324                 date_tz >>= 2;
 325                 date_tz_f *= 15;
 326         }
 327
 328         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
 329                         x_sys->class);
 330         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
 331                         be16_to_cpu(x_sys->block_size));
 332         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
 333                         be16_to_cpu(x_sys->block_count));
 334         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
 335                         be16_to_cpu(x_sys->user_block_count));
 336         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
 337                         be16_to_cpu(x_sys->page_size));
 338         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
 339                         "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
 340                         date_tz, date_tz_f,
 341                         be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
 342                         x_sys->assembly_date[3], x_sys->assembly_date[4],
 343                         x_sys->assembly_date[5], x_sys->assembly_date[6],
 344                         x_sys->assembly_date[7]);
 345         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
 346                         be32_to_cpu(x_sys->serial_number));
 347         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 348                         "assembly maker code: %x\n",
 349                         x_sys->assembly_maker_code);
 350         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
 351                         "%02x%02x%02x\n", x_sys->assembly_model_code[0],
 352                         x_sys->assembly_model_code[1],
 353                         x_sys->assembly_model_code[2]);
 354         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
 355                         be16_to_cpu(x_sys->memory_maker_code));
 356         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
 357                         be16_to_cpu(x_sys->memory_model_code));
 358         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
 359                         x_sys->vcc);
 360         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
 361                         x_sys->vpp);
 362         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
 363                         be16_to_cpu(x_sys->controller_number));
 364         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 365                         "controller function: %x\n",
 366                         be16_to_cpu(x_sys->controller_function));
 367         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 368                         be16_to_cpu(x_sys->start_sector));
 369         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
 370                         be16_to_cpu(x_sys->unit_size));
 371         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
 372                         x_sys->ms_sub_class);
 373         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
 374                         x_sys->interface_type);
 375         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
 376                         be16_to_cpu(x_sys->controller_code));
 377         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
 378                         x_sys->format_type);
 379         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
 380                         x_sys->device_type);
 381         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
 382                         x_sys->mspro_id);
 383         return rc;
 384 }
 385
 386 static ssize_t mspro_block_attr_show_modelname(struct device *dev,
 387                                                struct device_attribute *attr,
 388                                                char *buffer)
 389 {
 390         struct mspro_sys_attr *s_attr = container_of(attr,
 391                                                      struct mspro_sys_attr,
 392                                                      dev_attr);
 393
 394         return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
 395 }
 396
 397 static ssize_t mspro_block_attr_show_mbr(struct device *dev,
 398                                          struct device_attribute *attr,
 399                                          char *buffer)
 400 {
 401         struct mspro_sys_attr *x_attr = container_of(attr,
 402                                                      struct mspro_sys_attr,
 403                                                      dev_attr);
 404         struct mspro_mbr *x_mbr = x_attr->data;
 405         ssize_t rc = 0;
 406
 407         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
 408                         x_mbr->boot_partition);
 409         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
 410                         x_mbr->start_head);
 411         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 412                         x_mbr->start_sector);
 413         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
 414                         x_mbr->start_cylinder);
 415         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
 416                         x_mbr->partition_type);
 417         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
 418                         x_mbr->end_head);
 419         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
 420                         x_mbr->end_sector);
 421         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
 422                         x_mbr->end_cylinder);
 423         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
 424                         x_mbr->start_sectors);
 425         rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 426                         "sectors per partition: %x\n",
 427                         x_mbr->sectors_per_partition);
 428         return rc;
 429 }
 430
 431 static ssize_t mspro_block_attr_show_specfile(struct device *dev,
 432                                               struct device_attribute *attr,
 433                                               char *buffer)
 434 {
 435         struct mspro_sys_attr *x_attr = container_of(attr,
 436                                                      struct mspro_sys_attr,
 437                                                      dev_attr);
 438         struct mspro_specfile *x_spfile = x_attr->data;
 439         char name[9], ext[4];
 440         ssize_t rc = 0;
 441
 442         memcpy(name, x_spfile->name, 8);
 443         name[8] = 0;
 444         memcpy(ext, x_spfile->ext, 3);
 445         ext[3] = 0;
 446
 447         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
 448         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
 449         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
 450                         x_spfile->attr);
 451         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
 452                         x_spfile->time >> 11,
 453                         (x_spfile->time >> 5) & 0x3f,
 454                         (x_spfile->time & 0x1f) * 2);
 455         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
 456                         (x_spfile->date >> 9) + 1980,
 457                         (x_spfile->date >> 5) & 0xf,
 458                         x_spfile->date & 0x1f);
 459         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
 460                         x_spfile->cluster);
 461         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
 462                         x_spfile->size);
 463         return rc;
 464 }
 465
 466 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
 467                                              struct device_attribute *attr,
 468                                              char *buffer)
 469 {
 470         struct mspro_sys_attr *x_attr = container_of(attr,
 471                                                      struct mspro_sys_attr,
 472                                                      dev_attr);
 473         struct mspro_devinfo *x_devinfo = x_attr->data;
 474         ssize_t rc = 0;
 475
 476         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
 477                         be16_to_cpu(x_devinfo->cylinders));
 478         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
 479                         be16_to_cpu(x_devinfo->heads));
 480         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
 481                         be16_to_cpu(x_devinfo->bytes_per_track));
 482         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
 483                         be16_to_cpu(x_devinfo->bytes_per_sector));
 484         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
 485                         be16_to_cpu(x_devinfo->sectors_per_track));
 486         return rc;
 487 }
 488
 489 static sysfs_show_t mspro_block_attr_show(unsigned char tag)
 490 {
 491         switch (tag) {
 492         case MSPRO_BLOCK_ID_SYSINFO:
 493                 return mspro_block_attr_show_sysinfo;
 494         case MSPRO_BLOCK_ID_MODELNAME:
 495                 return mspro_block_attr_show_modelname;
 496         case MSPRO_BLOCK_ID_MBR:
 497                 return mspro_block_attr_show_mbr;
 498         case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 499         case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 500                 return mspro_block_attr_show_specfile;
 501         case MSPRO_BLOCK_ID_DEVINFO:
 502                 return mspro_block_attr_show_devinfo;
 503         default:
 504                 return mspro_block_attr_show_default;
 505         }
 506 }
 507
 508 /*** Protocol handlers ***/
 509
 510 /*
 511  * Functions prefixed with "h_" are protocol callbacks. They can be called from
 512  * interrupt context. Return value of 0 means that request processing is still
 513  * ongoing, while special error value of -EAGAIN means that current request is
 514  * finished (and request processor should come back some time later).
 515  */
 516
 517 static int h_mspro_block_req_init(struct memstick_dev *card,
 518                                   struct memstick_request **mrq)
 519 {
 520         struct mspro_block_data *msb = memstick_get_drvdata(card);
 521
 522         *mrq = &card->current_mrq;
 523         card->next_request = msb->mrq_handler;
 524         return 0;
 525 }
 526
 527 static int h_mspro_block_default(struct memstick_dev *card,
 528                                  struct memstick_request **mrq)
 529 {
 530         return mspro_block_complete_req(card, (*mrq)->error);
 531 }
 532
 533 static int h_mspro_block_default_bad(struct memstick_dev *card,
 534                                      struct memstick_request **mrq)
 535 {
 536         return -ENXIO;
 537 }
 538
 539 static int h_mspro_block_get_ro(struct memstick_dev *card,
 540                                 struct memstick_request **mrq)
 541 {
 542         struct mspro_block_data *msb = memstick_get_drvdata(card);
 543
 544         if (!(*mrq)->error) {
 545                 if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
 546                     & MEMSTICK_STATUS0_WP)
 547                         msb->read_only = 1;
 548                 else
 549                         msb->read_only = 0;
 550         }
 551
 552         return mspro_block_complete_req(card, (*mrq)->error);
 553 }
 554
 555 static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
 556                                       struct memstick_request **mrq)
 557 {
 558         dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
 559
 560         if (!(*mrq)->error) {
 561                 if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
 562                         (*mrq)->error = -EFAULT;
 563                 else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
 564                         return 0;
 565         }
 566
 567         return mspro_block_complete_req(card, (*mrq)->error);
 568 }
 569
 570 static int h_mspro_block_transfer_data(struct memstick_dev *card,
 571                                        struct memstick_request **mrq)
 572 {
 573         struct mspro_block_data *msb = memstick_get_drvdata(card);
 574         unsigned char t_val = 0;
 575         struct scatterlist t_sg = { 0 };
 576         size_t t_offset;
 577
 578         if ((*mrq)->error)
 579                 return mspro_block_complete_req(card, (*mrq)->error);
 580
 581         switch ((*mrq)->tpc) {
 582         case MS_TPC_WRITE_REG:
 583                 memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
 584                 (*mrq)->need_card_int = 1;
 585                 return 0;
 586         case MS_TPC_SET_CMD:
 587                 t_val = (*mrq)->int_reg;
 588                 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 589                 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
 590                         goto has_int_reg;
 591                 return 0;
 592         case MS_TPC_GET_INT:
 593                 t_val = (*mrq)->data[0];
 594 has_int_reg:
 595                 if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
 596                         t_val = MSPRO_CMD_STOP;
 597                         memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
 598                         card->next_request = h_mspro_block_default;
 599                         return 0;
 600                 }
 601
 602                 if (msb->current_page
 603                     == (msb->req_sg[msb->current_seg].length
 604                         / msb->page_size)) {
 605                         msb->current_page = 0;
 606                         msb->current_seg++;
 607
 608                         if (msb->current_seg == msb->seg_count) {
 609                                 if (t_val & MEMSTICK_INT_CED) {
 610                                         return mspro_block_complete_req(card,
 611                                                                         0);
 612                                 } else {
 613                                         card->next_request
 614                                                 = h_mspro_block_wait_for_ced;
 615                                         memstick_init_req(*mrq, MS_TPC_GET_INT,
 616                                                           NULL, 1);
 617                                         return 0;
 618                                 }
 619                         }
 620                 }
 621
 622                 if (!(t_val & MEMSTICK_INT_BREQ)) {
 623                         memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 624                         return 0;
 625                 }
 626
 627                 t_offset = msb->req_sg[msb->current_seg].offset;
 628                 t_offset += msb->current_page * msb->page_size;
 629
 630                 sg_set_page(&t_sg,
 631                             nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
 632                                      t_offset >> PAGE_SHIFT),
 633                             msb->page_size, offset_in_page(t_offset));
 634
 635                 memstick_init_req_sg(*mrq, msb->data_dir == READ
 636                                            ? MS_TPC_READ_LONG_DATA
 637                                            : MS_TPC_WRITE_LONG_DATA,
 638                                      &t_sg);
 639                 (*mrq)->need_card_int = 1;
 640                 return 0;
 641         case MS_TPC_READ_LONG_DATA:
 642         case MS_TPC_WRITE_LONG_DATA:
 643                 msb->current_page++;
 644                 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
 645                         t_val = (*mrq)->int_reg;
 646                         goto has_int_reg;
 647                 } else {
 648                         memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 649                         return 0;
 650                 }
 651
 652         default:
 653                 BUG();
 654         }
 655 }
 656
 657 /*** Data transfer ***/
 658
 659 static int mspro_block_issue_req(struct memstick_dev *card, int chunk)
 660 {
 661         struct mspro_block_data *msb = memstick_get_drvdata(card);
 662         sector_t t_sec;
 663         unsigned int count;
 664         struct mspro_param_register param;
 665
 666 try_again:
 667         while (chunk) {
 668                 msb->current_page = 0;
 669                 msb->current_seg = 0;
 670                 msb->seg_count = blk_rq_map_sg(msb->block_req->q,
 671                                                msb->block_req,
 672                                                msb->req_sg);
 673
 674                 if (!msb->seg_count) {
 675                         chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
 676                         continue;
 677                 }
 678
 679                 t_sec = blk_rq_pos(msb->block_req) << 9;
 680                 sector_div(t_sec, msb->page_size);
 681
 682                 count = blk_rq_bytes(msb->block_req);
 683                 count /= msb->page_size;
 684
 685                 param.system = msb->system;
 686                 param.data_count = cpu_to_be16(count);
 687                 param.data_address = cpu_to_be32((uint32_t)t_sec);
 688                 param.tpc_param = 0;
 689
 690                 msb->data_dir = rq_data_dir(msb->block_req);
 691                 msb->transfer_cmd = msb->data_dir == READ
 692                                     ? MSPRO_CMD_READ_DATA
 693                                     : MSPRO_CMD_WRITE_DATA;
 694
 695                 dev_dbg(&card->dev, "data transfer: cmd %x, "
 696                         "lba %x, count %x\n", msb->transfer_cmd,
 697                         be32_to_cpu(param.data_address), count);
 698
 699                 card->next_request = h_mspro_block_req_init;
 700                 msb->mrq_handler = h_mspro_block_transfer_data;
 701                 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
 702                                   &param, sizeof(param));
 703                 memstick_new_req(card->host);
 704                 return 0;
 705         }
 706
 707         dev_dbg(&card->dev, "blk_fetch\n");
 708         msb->block_req = blk_fetch_request(msb->queue);
 709         if (!msb->block_req) {
 710                 dev_dbg(&card->dev, "issue end\n");
 711                 return -EAGAIN;
 712         }
 713
 714         dev_dbg(&card->dev, "trying again\n");
 715         chunk = 1;
 716         goto try_again;
 717 }
 718
 719 static int mspro_block_complete_req(struct memstick_dev *card, int error)
 720 {
 721         struct mspro_block_data *msb = memstick_get_drvdata(card);
 722         int chunk, cnt;
 723         unsigned int t_len = 0;
 724         unsigned long flags;
 725
 726         spin_lock_irqsave(&msb->q_lock, flags);
 727         dev_dbg(&card->dev, "complete %d, %d\n", msb->has_request ? 1 : 0,
 728                 error);
 729
 730         if (msb->has_request) {
 731                 /* Nothing to do - not really an error */
 732                 if (error == -EAGAIN)
 733                         error = 0;
 734
 735                 if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
 736                         if (msb->data_dir == READ) {
 737                                 for (cnt = 0; cnt < msb->current_seg; cnt++)
 738                                         t_len += msb->req_sg[cnt].length
 739                                                  / msb->page_size;
 740
 741                                         if (msb->current_page)
 742                                                 t_len += msb->current_page - 1;
 743
 744                                         t_len *= msb->page_size;
 745                         }
 746                 } else
 747                         t_len = blk_rq_bytes(msb->block_req);
 748
 749                 dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
 750
 751                 if (error && !t_len)
 752                         t_len = blk_rq_cur_bytes(msb->block_req);
 753
 754                 chunk = __blk_end_request(msb->block_req, error, t_len);
 755
 756                 error = mspro_block_issue_req(card, chunk);
 757
 758                 if (!error)
 759                         goto out;
 760                 else
 761                         msb->has_request = 0;
 762         } else {
 763                 if (!error)
 764                         error = -EAGAIN;
 765         }
 766
 767         card->next_request = h_mspro_block_default_bad;
 768         complete_all(&card->mrq_complete);
 769 out:
 770         spin_unlock_irqrestore(&msb->q_lock, flags);
 771         return error;
 772 }
 773
 774 static void mspro_block_stop(struct memstick_dev *card)
 775 {
 776         struct mspro_block_data *msb = memstick_get_drvdata(card);
 777         int rc = 0;
 778         unsigned long flags;
 779
 780         while (1) {
 781                 spin_lock_irqsave(&msb->q_lock, flags);
 782                 if (!msb->has_request) {
 783                         blk_stop_queue(msb->queue);
 784                         rc = 1;
 785                 }
 786                 spin_unlock_irqrestore(&msb->q_lock, flags);
 787
 788                 if (rc)
 789                         break;
 790
 791                 wait_for_completion(&card->mrq_complete);
 792         }
 793 }
 794
 795 static void mspro_block_start(struct memstick_dev *card)
 796 {
 797         struct mspro_block_data *msb = memstick_get_drvdata(card);
 798         unsigned long flags;
 799
 800         spin_lock_irqsave(&msb->q_lock, flags);
 801         blk_start_queue(msb->queue);
 802         spin_unlock_irqrestore(&msb->q_lock, flags);
 803 }
 804
 805 static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
 806 {
 807         if (!blk_fs_request(req) && !blk_pc_request(req)) {
 808                 blk_dump_rq_flags(req, "MSPro unsupported request");
 809                 return BLKPREP_KILL;
 810         }
 811
 812         req->cmd_flags |= REQ_DONTPREP;
 813
 814         return BLKPREP_OK;
 815 }
 816
 817 static void mspro_block_submit_req(struct request_queue *q)
 818 {
 819         struct memstick_dev *card = q->queuedata;
 820         struct mspro_block_data *msb = memstick_get_drvdata(card);
 821         struct request *req = NULL;
 822
 823         if (msb->has_request)
 824                 return;
 825
 826         if (msb->eject) {
 827                 while ((req = blk_fetch_request(q)) != NULL)
 828                         __blk_end_request_all(req, -ENODEV);
 829
 830                 return;
 831         }
 832
 833         msb->has_request = 1;
 834         if (mspro_block_issue_req(card, 0))
 835                 msb->has_request = 0;
 836 }
 837
 838 /*** Initialization ***/
 839
 840 static int mspro_block_wait_for_ced(struct memstick_dev *card)
 841 {
 842         struct mspro_block_data *msb = memstick_get_drvdata(card);
 843
 844         card->next_request = h_mspro_block_req_init;
 845         msb->mrq_handler = h_mspro_block_wait_for_ced;
 846         memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 847         memstick_new_req(card->host);
 848         wait_for_completion(&card->mrq_complete);
 849         return card->current_mrq.error;
 850 }
 851
 852 static int mspro_block_set_interface(struct memstick_dev *card,
 853                                      unsigned char sys_reg)
 854 {
 855         struct memstick_host *host = card->host;
 856         struct mspro_block_data *msb = memstick_get_drvdata(card);
 857         struct mspro_param_register param = {
 858                 .system = sys_reg,
 859                 .data_count = 0,
 860                 .data_address = 0,
 861                 .tpc_param = 0
 862         };
 863
 864         card->next_request = h_mspro_block_req_init;
 865         msb->mrq_handler = h_mspro_block_default;
 866         memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
 867                           sizeof(param));
 868         memstick_new_req(host);
 869         wait_for_completion(&card->mrq_complete);
 870         return card->current_mrq.error;
 871 }
 872
 873 static int mspro_block_switch_interface(struct memstick_dev *card)
 874 {
 875         struct memstick_host *host = card->host;
 876         struct mspro_block_data *msb = memstick_get_drvdata(card);
 877         int rc = 0;
 878
 879 try_again:
 880         if (msb->caps & MEMSTICK_CAP_PAR4)
 881                 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
 882         else
 883                 return 0;
 884
 885         if (rc) {
 886                 printk(KERN_WARNING
 887                        "%s: could not switch to 4-bit mode, error %d\n",
 888                        dev_name(&card->dev), rc);
 889                 return 0;
 890         }
 891
 892         msb->system = MEMSTICK_SYS_PAR4;
 893         host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
 894         printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
 895                dev_name(&card->dev));
 896
 897         if (msb->caps & MEMSTICK_CAP_PAR8) {
 898                 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
 899
 900                 if (!rc) {
 901                         msb->system = MEMSTICK_SYS_PAR8;
 902                         host->set_param(host, MEMSTICK_INTERFACE,
 903                                         MEMSTICK_PAR8);
 904                         printk(KERN_INFO
 905                                "%s: switching to 8-bit parallel mode\n",
 906                                dev_name(&card->dev));
 907                 } else
 908                         printk(KERN_WARNING
 909                                "%s: could not switch to 8-bit mode, error %d\n",
 910                                dev_name(&card->dev), rc);
 911         }
 912
 913         card->next_request = h_mspro_block_req_init;
 914         msb->mrq_handler = h_mspro_block_default;
 915         memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 916         memstick_new_req(card->host);
 917         wait_for_completion(&card->mrq_complete);
 918         rc = card->current_mrq.error;
 919
 920         if (rc) {
 921                 printk(KERN_WARNING
 922                        "%s: interface error, trying to fall back to serial\n",
 923                        dev_name(&card->dev));
 924                 msb->system = MEMSTICK_SYS_SERIAL;
 925                 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
 926                 msleep(10);
 927                 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
 928                 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
 929
 930                 rc = memstick_set_rw_addr(card);
 931                 if (!rc)
 932                         rc = mspro_block_set_interface(card, msb->system);
 933
 934                 if (!rc) {
 935                         msleep(150);
 936                         rc = mspro_block_wait_for_ced(card);
 937                         if (rc)
 938                                 return rc;
 939
 940                         if (msb->caps & MEMSTICK_CAP_PAR8) {
 941                                 msb->caps &= ~MEMSTICK_CAP_PAR8;
 942                                 goto try_again;
 943                         }
 944                 }
 945         }
 946         return rc;
 947 }
 948
 949 /* Memory allocated for attributes by this function should be freed by
 950  * mspro_block_data_clear, no matter if the initialization process succeded
 951  * or failed.
 952  */
 953 static int mspro_block_read_attributes(struct memstick_dev *card)
 954 {
 955         struct mspro_block_data *msb = memstick_get_drvdata(card);
 956         struct mspro_param_register param = {
 957                 .system = msb->system,
 958                 .data_count = cpu_to_be16(1),
 959                 .data_address = 0,
 960                 .tpc_param = 0
 961         };
 962         struct mspro_attribute *attr = NULL;
 963         struct mspro_sys_attr *s_attr = NULL;
 964         unsigned char *buffer = NULL;
 965         int cnt, rc, attr_count;
 966         unsigned int addr;
 967         unsigned short page_count;
 968
 969         attr = kmalloc(msb->page_size, GFP_KERNEL);
 970         if (!attr)
 971                 return -ENOMEM;
 972
 973         sg_init_one(&msb->req_sg[0], attr, msb->page_size);
 974         msb->seg_count = 1;
 975         msb->current_seg = 0;
 976         msb->current_page = 0;
 977         msb->data_dir = READ;
 978         msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
 979
 980         card->next_request = h_mspro_block_req_init;
 981         msb->mrq_handler = h_mspro_block_transfer_data;
 982         memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
 983                           sizeof(param));
 984         memstick_new_req(card->host);
 985         wait_for_completion(&card->mrq_complete);
 986         if (card->current_mrq.error) {
 987                 rc = card->current_mrq.error;
 988                 goto out_free_attr;
 989         }
 990
 991         if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
 992                 printk(KERN_ERR "%s: unrecognized device signature %x\n",
 993                        dev_name(&card->dev), be16_to_cpu(attr->signature));
 994                 rc = -ENODEV;
 995                 goto out_free_attr;
 996         }
 997
 998         if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
 999                 printk(KERN_WARNING "%s: way too many attribute entries\n",
1000                        dev_name(&card->dev));
1001                 attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
1002         } else
1003                 attr_count = attr->count;
1004
1005         msb->attr_group.attrs = kzalloc((attr_count + 1)
1006                                         * sizeof(struct attribute),
1007                                         GFP_KERNEL);
1008         if (!msb->attr_group.attrs) {
1009                 rc = -ENOMEM;
1010                 goto out_free_attr;
1011         }
1012         msb->attr_group.name = "media_attributes";
1013
1014         buffer = kmalloc(msb->page_size, GFP_KERNEL);
1015         if (!buffer) {
1016                 rc = -ENOMEM;
1017                 goto out_free_attr;
1018         }
1019         memcpy(buffer, (char *)attr, msb->page_size);
1020         page_count = 1;
1021
1022         for (cnt = 0; cnt < attr_count; ++cnt) {
1023                 s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
1024                 if (!s_attr) {
1025                         rc = -ENOMEM;
1026                         goto out_free_buffer;
1027                 }
1028
1029                 msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1030                 addr = be32_to_cpu(attr->entries[cnt].address);
1031                 rc = be32_to_cpu(attr->entries[cnt].size);
1032                 dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
1033                         "size %x\n", cnt, attr->entries[cnt].id, addr, rc);
1034                 s_attr->id = attr->entries[cnt].id;
1035                 if (mspro_block_attr_name(s_attr->id))
1036                         snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1037                                  mspro_block_attr_name(attr->entries[cnt].id));
1038                 else
1039                         snprintf(s_attr->name, sizeof(s_attr->name),
1040                                  "attr_x%02x", attr->entries[cnt].id);
1041
1042                 s_attr->dev_attr.attr.name = s_attr->name;
1043                 s_attr->dev_attr.attr.mode = S_IRUGO;
1044                 s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1045
1046                 if (!rc)
1047                         continue;
1048
1049                 s_attr->size = rc;
1050                 s_attr->data = kmalloc(rc, GFP_KERNEL);
1051                 if (!s_attr->data) {
1052                         rc = -ENOMEM;
1053                         goto out_free_buffer;
1054                 }
1055
1056                 if (((addr / msb->page_size)
1057                      == be32_to_cpu(param.data_address))
1058                     && (((addr + rc - 1) / msb->page_size)
1059                         == be32_to_cpu(param.data_address))) {
1060                         memcpy(s_attr->data, buffer + addr % msb->page_size,
1061                                rc);
1062                         continue;
1063                 }
1064
1065                 if (page_count <= (rc / msb->page_size)) {
1066                         kfree(buffer);
1067                         page_count = (rc / msb->page_size) + 1;
1068                         buffer = kmalloc(page_count * msb->page_size,
1069                                          GFP_KERNEL);
1070                         if (!buffer) {
1071                                 rc = -ENOMEM;
1072                                 goto out_free_attr;
1073                         }
1074                 }
1075
1076                 param.system = msb->system;
1077                 param.data_count = cpu_to_be16((rc / msb->page_size) + 1);
1078                 param.data_address = cpu_to_be32(addr / msb->page_size);
1079                 param.tpc_param = 0;
1080
1081                 sg_init_one(&msb->req_sg[0], buffer,
1082                             be16_to_cpu(param.data_count) * msb->page_size);
1083                 msb->seg_count = 1;
1084                 msb->current_seg = 0;
1085                 msb->current_page = 0;
1086                 msb->data_dir = READ;
1087                 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1088
1089                 dev_dbg(&card->dev, "reading attribute pages %x, %x\n",
1090                         be32_to_cpu(param.data_address),
1091                         be16_to_cpu(param.data_count));
1092
1093                 card->next_request = h_mspro_block_req_init;
1094                 msb->mrq_handler = h_mspro_block_transfer_data;
1095                 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
1096                                   (char *)&param, sizeof(param));
1097                 memstick_new_req(card->host);
1098                 wait_for_completion(&card->mrq_complete);
1099                 if (card->current_mrq.error) {
1100                         rc = card->current_mrq.error;
1101                         goto out_free_buffer;
1102                 }
1103
1104                 memcpy(s_attr->data, buffer + addr % msb->page_size, rc);
1105         }
1106
1107         rc = 0;
1108 out_free_buffer:
1109         kfree(buffer);
1110 out_free_attr:
1111         kfree(attr);
1112         return rc;
1113 }
1114
1115 static int mspro_block_init_card(struct memstick_dev *card)
1116 {
1117         struct mspro_block_data *msb = memstick_get_drvdata(card);
1118         struct memstick_host *host = card->host;
1119         int rc = 0;
1120
1121         msb->system = MEMSTICK_SYS_SERIAL;
1122         card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1123         card->reg_addr.r_length = sizeof(struct ms_status_register);
1124         card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1125         card->reg_addr.w_length = sizeof(struct mspro_param_register);
1126
1127         if (memstick_set_rw_addr(card))
1128                 return -EIO;
1129
1130         msb->caps = host->caps;
1131
1132         msleep(150);
1133         rc = mspro_block_wait_for_ced(card);
1134         if (rc)
1135                 return rc;
1136
1137         rc = mspro_block_switch_interface(card);
1138         if (rc)
1139                 return rc;
1140
1141         dev_dbg(&card->dev, "card activated\n");
1142         if (msb->system != MEMSTICK_SYS_SERIAL)
1143                 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1144
1145         card->next_request = h_mspro_block_req_init;
1146         msb->mrq_handler = h_mspro_block_get_ro;
1147         memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1148                           sizeof(struct ms_status_register));
1149         memstick_new_req(card->host);
1150         wait_for_completion(&card->mrq_complete);
1151         if (card->current_mrq.error)
1152                 return card->current_mrq.error;
1153
1154         dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1155
1156         msb->page_size = 512;
1157         rc = mspro_block_read_attributes(card);
1158         if (rc)
1159                 return rc;
1160
1161         dev_dbg(&card->dev, "attributes loaded\n");
1162         return 0;
1163
1164 }
1165
1166 static int mspro_block_init_disk(struct memstick_dev *card)
1167 {
1168         struct mspro_block_data *msb = memstick_get_drvdata(card);
1169         struct memstick_host *host = card->host;
1170         struct mspro_devinfo *dev_info = NULL;
1171         struct mspro_sys_info *sys_info = NULL;
1172         struct mspro_sys_attr *s_attr = NULL;
1173         int rc, disk_id;
1174         u64 limit = BLK_BOUNCE_HIGH;
1175         unsigned long capacity;
1176
1177         if (host->dev.dma_mask && *(host->dev.dma_mask))
1178                 limit = *(host->dev.dma_mask);
1179
1180         for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1181                 s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1182
1183                 if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1184                         dev_info = s_attr->data;
1185                 else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1186                         sys_info = s_attr->data;
1187         }
1188
1189         if (!dev_info || !sys_info)
1190                 return -ENODEV;
1191
1192         msb->cylinders = be16_to_cpu(dev_info->cylinders);
1193         msb->heads = be16_to_cpu(dev_info->heads);
1194         msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1195
1196         msb->page_size = be16_to_cpu(sys_info->unit_size);
1197
1198         if (!idr_pre_get(&mspro_block_disk_idr, GFP_KERNEL))
1199                 return -ENOMEM;
1200
1201         mutex_lock(&mspro_block_disk_lock);
1202         rc = idr_get_new(&mspro_block_disk_idr, card, &disk_id);
1203         mutex_unlock(&mspro_block_disk_lock);
1204
1205         if (rc)
1206                 return rc;
1207
1208         if ((disk_id << MSPRO_BLOCK_PART_SHIFT) > 255) {
1209                 rc = -ENOSPC;
1210                 goto out_release_id;
1211         }
1212
1213         msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
1214         if (!msb->disk) {
1215                 rc = -ENOMEM;
1216                 goto out_release_id;
1217         }
1218
1219         msb->queue = blk_init_queue(mspro_block_submit_req, &msb->q_lock);
1220         if (!msb->queue) {
1221                 rc = -ENOMEM;
1222                 goto out_put_disk;
1223         }
1224
1225         msb->queue->queuedata = card;
1226         blk_queue_prep_rq(msb->queue, mspro_block_prepare_req);
1227
1228         blk_queue_bounce_limit(msb->queue, limit);
1229         blk_queue_max_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
1230         blk_queue_max_phys_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1231         blk_queue_max_hw_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1232         blk_queue_max_segment_size(msb->queue,
1233                                    MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1234
1235         msb->disk->major = major;
1236         msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1237         msb->disk->fops = &ms_block_bdops;
1238         msb->usage_count = 1;
1239         msb->disk->private_data = msb;
1240         msb->disk->queue = msb->queue;
1241         msb->disk->driverfs_dev = &card->dev;
1242
1243         sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1244
1245         blk_queue_logical_block_size(msb->queue, msb->page_size);
1246
1247         capacity = be16_to_cpu(sys_info->user_block_count);
1248         capacity *= be16_to_cpu(sys_info->block_size);
1249         capacity *= msb->page_size >> 9;
1250         set_capacity(msb->disk, capacity);
1251         dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1252
1253         add_disk(msb->disk);
1254         msb->active = 1;
1255         return 0;
1256
1257 out_put_disk:
1258         put_disk(msb->disk);
1259 out_release_id:
1260         mutex_lock(&mspro_block_disk_lock);
1261         idr_remove(&mspro_block_disk_idr, disk_id);
1262         mutex_unlock(&mspro_block_disk_lock);
1263         return rc;
1264 }
1265
1266 static void mspro_block_data_clear(struct mspro_block_data *msb)
1267 {
1268         int cnt;
1269         struct mspro_sys_attr *s_attr;
1270
1271         if (msb->attr_group.attrs) {
1272                 for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1273                         s_attr = mspro_from_sysfs_attr(msb->attr_group
1274                                                            .attrs[cnt]);
1275                         kfree(s_attr->data);
1276                         kfree(s_attr);
1277                 }
1278                 kfree(msb->attr_group.attrs);
1279         }
1280
1281         msb->card = NULL;
1282 }
1283
1284 static int mspro_block_check_card(struct memstick_dev *card)
1285 {
1286         struct mspro_block_data *msb = memstick_get_drvdata(card);
1287
1288         return (msb->active == 1);
1289 }
1290
1291 static int mspro_block_probe(struct memstick_dev *card)
1292 {
1293         struct mspro_block_data *msb;
1294         int rc = 0;
1295
1296         msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1297         if (!msb)
1298                 return -ENOMEM;
1299         memstick_set_drvdata(card, msb);
1300         msb->card = card;
1301         spin_lock_init(&msb->q_lock);
1302
1303         rc = mspro_block_init_card(card);
1304
1305         if (rc)
1306                 goto out_free;
1307
1308         rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1309         if (rc)
1310                 goto out_free;
1311
1312         rc = mspro_block_init_disk(card);
1313         if (!rc) {
1314                 card->check = mspro_block_check_card;
1315                 card->stop = mspro_block_stop;
1316                 card->start = mspro_block_start;
1317                 return 0;
1318         }
1319
1320         sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1321 out_free:
1322         memstick_set_drvdata(card, NULL);
1323         mspro_block_data_clear(msb);
1324         kfree(msb);
1325         return rc;
1326 }
1327
1328 static void mspro_block_remove(struct memstick_dev *card)
1329 {
1330         struct mspro_block_data *msb = memstick_get_drvdata(card);
1331         unsigned long flags;
1332
1333         del_gendisk(msb->disk);
1334         dev_dbg(&card->dev, "mspro block remove\n");
1335         spin_lock_irqsave(&msb->q_lock, flags);
1336         msb->eject = 1;
1337         blk_start_queue(msb->queue);
1338         spin_unlock_irqrestore(&msb->q_lock, flags);
1339
1340         blk_cleanup_queue(msb->queue);
1341         msb->queue = NULL;
1342
1343         sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1344
1345         mutex_lock(&mspro_block_disk_lock);
1346         mspro_block_data_clear(msb);
1347         mutex_unlock(&mspro_block_disk_lock);
1348
1349         mspro_block_disk_release(msb->disk);
1350         memstick_set_drvdata(card, NULL);
1351 }
1352
1353 #ifdef CONFIG_PM
1354
1355 static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1356 {
1357         struct mspro_block_data *msb = memstick_get_drvdata(card);
1358         unsigned long flags;
1359
1360         spin_lock_irqsave(&msb->q_lock, flags);
1361         blk_stop_queue(msb->queue);
1362         msb->active = 0;
1363         spin_unlock_irqrestore(&msb->q_lock, flags);
1364
1365         return 0;
1366 }
1367
1368 static int mspro_block_resume(struct memstick_dev *card)
1369 {
1370         struct mspro_block_data *msb = memstick_get_drvdata(card);
1371         unsigned long flags;
1372         int rc = 0;
1373
1374 #ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1375
1376         struct mspro_block_data *new_msb;
1377         struct memstick_host *host = card->host;
1378         struct mspro_sys_attr *s_attr, *r_attr;
1379         unsigned char cnt;
1380
1381         mutex_lock(&host->lock);
1382         new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1383         if (!new_msb) {
1384                 rc = -ENOMEM;
1385                 goto out_unlock;
1386         }
1387
1388         new_msb->card = card;
1389         memstick_set_drvdata(card, new_msb);
1390         if (mspro_block_init_card(card))
1391                 goto out_free;
1392
1393         for (cnt = 0; new_msb->attr_group.attrs[cnt]
1394                       && msb->attr_group.attrs[cnt]; ++cnt) {
1395                 s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1396                 r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1397
1398                 if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1399                     && r_attr->id == s_attr->id) {
1400                         if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1401                                 break;
1402
1403                         msb->active = 1;
1404                         break;
1405                 }
1406         }
1407
1408 out_free:
1409         memstick_set_drvdata(card, msb);
1410         mspro_block_data_clear(new_msb);
1411         kfree(new_msb);
1412 out_unlock:
1413         mutex_unlock(&host->lock);
1414
1415 #endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1416
1417         spin_lock_irqsave(&msb->q_lock, flags);
1418         blk_start_queue(msb->queue);
1419         spin_unlock_irqrestore(&msb->q_lock, flags);
1420         return rc;
1421 }
1422
1423 #else
1424
1425 #define mspro_block_suspend NULL
1426 #define mspro_block_resume NULL
1427
1428 #endif /* CONFIG_PM */
1429
1430 static struct memstick_device_id mspro_block_id_tbl[] = {
1431         {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1432          MEMSTICK_CLASS_DUO},
1433         {}
1434 };
1435
1436
1437 static struct memstick_driver mspro_block_driver = {
1438         .driver = {
1439                 .name  = DRIVER_NAME,
1440                 .owner = THIS_MODULE
1441         },
1442         .id_table = mspro_block_id_tbl,
1443         .probe    = mspro_block_probe,
1444         .remove   = mspro_block_remove,
1445         .suspend  = mspro_block_suspend,
1446         .resume   = mspro_block_resume
1447 };
1448
1449 static int __init mspro_block_init(void)
1450 {
1451         int rc = -ENOMEM;
1452
1453         rc = register_blkdev(major, DRIVER_NAME);
1454         if (rc < 0) {
1455                 printk(KERN_ERR DRIVER_NAME ": failed to register "
1456                        "major %d, error %d\n", major, rc);
1457                 return rc;
1458         }
1459         if (!major)
1460                 major = rc;
1461
1462         rc = memstick_register_driver(&mspro_block_driver);
1463         if (rc)
1464                 unregister_blkdev(major, DRIVER_NAME);
1465         return rc;
1466 }
1467
1468 static void __exit mspro_block_exit(void)
1469 {
1470         memstick_unregister_driver(&mspro_block_driver);
1471         unregister_blkdev(major, DRIVER_NAME);
1472         idr_destroy(&mspro_block_disk_idr);
1473 }
1474
1475 module_init(mspro_block_init);
1476 module_exit(mspro_block_exit);
1477
1478 MODULE_LICENSE("GPL");
1479 MODULE_AUTHOR("Alex Dubov");
1480 MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1481 MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);