linux/drivers/memstick/core/mspro_block.c
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   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/slab.h>
  21#include <linux/mutex.h>
  22#include <linux/memstick.h>
  23#include <linux/module.h>
  24
  25#define DRIVER_NAME "mspro_block"
  26
  27static int major;
  28module_param(major, int, 0644);
  29
  30#define MSPRO_BLOCK_MAX_SEGS  32
  31#define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
  32
  33#define MSPRO_BLOCK_SIGNATURE        0xa5c3
  34#define MSPRO_BLOCK_MAX_ATTRIBUTES   41
  35
  36#define MSPRO_BLOCK_PART_SHIFT 3
  37
  38enum {
  39        MSPRO_BLOCK_ID_SYSINFO         = 0x10,
  40        MSPRO_BLOCK_ID_MODELNAME       = 0x15,
  41        MSPRO_BLOCK_ID_MBR             = 0x20,
  42        MSPRO_BLOCK_ID_PBR16           = 0x21,
  43        MSPRO_BLOCK_ID_PBR32           = 0x22,
  44        MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
  45        MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
  46        MSPRO_BLOCK_ID_DEVINFO         = 0x30
  47};
  48
  49struct mspro_sys_attr {
  50        size_t                  size;
  51        void                    *data;
  52        unsigned char           id;
  53        char                    name[32];
  54        struct device_attribute dev_attr;
  55};
  56
  57struct mspro_attr_entry {
  58        __be32 address;
  59        __be32 size;
  60        unsigned char id;
  61        unsigned char reserved[3];
  62} __attribute__((packed));
  63
  64struct mspro_attribute {
  65        __be16 signature;
  66        unsigned short          version;
  67        unsigned char           count;
  68        unsigned char           reserved[11];
  69        struct mspro_attr_entry entries[];
  70} __attribute__((packed));
  71
  72struct mspro_sys_info {
  73        unsigned char  class;
  74        unsigned char  reserved0;
  75        __be16 block_size;
  76        __be16 block_count;
  77        __be16 user_block_count;
  78        __be16 page_size;
  79        unsigned char  reserved1[2];
  80        unsigned char  assembly_date[8];
  81        __be32 serial_number;
  82        unsigned char  assembly_maker_code;
  83        unsigned char  assembly_model_code[3];
  84        __be16 memory_maker_code;
  85        __be16 memory_model_code;
  86        unsigned char  reserved2[4];
  87        unsigned char  vcc;
  88        unsigned char  vpp;
  89        __be16 controller_number;
  90        __be16 controller_function;
  91        __be16 start_sector;
  92        __be16 unit_size;
  93        unsigned char  ms_sub_class;
  94        unsigned char  reserved3[4];
  95        unsigned char  interface_type;
  96        __be16 controller_code;
  97        unsigned char  format_type;
  98        unsigned char  reserved4;
  99        unsigned char  device_type;
 100        unsigned char  reserved5[7];
 101        unsigned char  mspro_id[16];
 102        unsigned char  reserved6[16];
 103} __attribute__((packed));
 104
 105struct mspro_mbr {
 106        unsigned char boot_partition;
 107        unsigned char start_head;
 108        unsigned char start_sector;
 109        unsigned char start_cylinder;
 110        unsigned char partition_type;
 111        unsigned char end_head;
 112        unsigned char end_sector;
 113        unsigned char end_cylinder;
 114        unsigned int  start_sectors;
 115        unsigned int  sectors_per_partition;
 116} __attribute__((packed));
 117
 118struct mspro_specfile {
 119        char           name[8];
 120        char           ext[3];
 121        unsigned char  attr;
 122        unsigned char  reserved[10];
 123        unsigned short time;
 124        unsigned short date;
 125        unsigned short cluster;
 126        unsigned int   size;
 127} __attribute__((packed));
 128
 129struct mspro_devinfo {
 130        __be16 cylinders;
 131        __be16 heads;
 132        __be16 bytes_per_track;
 133        __be16 bytes_per_sector;
 134        __be16 sectors_per_track;
 135        unsigned char  reserved[6];
 136} __attribute__((packed));
 137
 138struct mspro_block_data {
 139        struct memstick_dev   *card;
 140        unsigned int          usage_count;
 141        unsigned int          caps;
 142        struct gendisk        *disk;
 143        struct request_queue  *queue;
 144        struct request        *block_req;
 145        spinlock_t            q_lock;
 146
 147        unsigned short        page_size;
 148        unsigned short        cylinders;
 149        unsigned short        heads;
 150        unsigned short        sectors_per_track;
 151
 152        unsigned char         system;
 153        unsigned char         read_only:1,
 154                              eject:1,
 155                              has_request:1,
 156                              data_dir:1,
 157                              active:1;
 158        unsigned char         transfer_cmd;
 159
 160        int                   (*mrq_handler)(struct memstick_dev *card,
 161                                             struct memstick_request **mrq);
 162
 163
 164        /* Default request setup function for data access method preferred by
 165         * this host instance.
 166         */
 167        void                  (*setup_transfer)(struct memstick_dev *card,
 168                                                u64 offset, size_t length);
 169
 170        struct attribute_group attr_group;
 171
 172        struct scatterlist    req_sg[MSPRO_BLOCK_MAX_SEGS];
 173        unsigned int          seg_count;
 174        unsigned int          current_seg;
 175        unsigned int          current_page;
 176};
 177
 178static DEFINE_IDR(mspro_block_disk_idr);
 179static DEFINE_MUTEX(mspro_block_disk_lock);
 180
 181static int mspro_block_complete_req(struct memstick_dev *card, int error);
 182
 183/*** Block device ***/
 184
 185static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
 186{
 187        struct gendisk *disk = bdev->bd_disk;
 188        struct mspro_block_data *msb = disk->private_data;
 189        int rc = -ENXIO;
 190
 191        mutex_lock(&mspro_block_disk_lock);
 192
 193        if (msb && msb->card) {
 194                msb->usage_count++;
 195                if ((mode & FMODE_WRITE) && msb->read_only)
 196                        rc = -EROFS;
 197                else
 198                        rc = 0;
 199        }
 200
 201        mutex_unlock(&mspro_block_disk_lock);
 202
 203        return rc;
 204}
 205
 206
 207static void mspro_block_disk_release(struct gendisk *disk)
 208{
 209        struct mspro_block_data *msb = disk->private_data;
 210        int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
 211
 212        mutex_lock(&mspro_block_disk_lock);
 213
 214        if (msb) {
 215                if (msb->usage_count)
 216                        msb->usage_count--;
 217
 218                if (!msb->usage_count) {
 219                        kfree(msb);
 220                        disk->private_data = NULL;
 221                        idr_remove(&mspro_block_disk_idr, disk_id);
 222                        put_disk(disk);
 223                }
 224        }
 225
 226        mutex_unlock(&mspro_block_disk_lock);
 227}
 228
 229static void mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
 230{
 231        mspro_block_disk_release(disk);
 232}
 233
 234static int mspro_block_bd_getgeo(struct block_device *bdev,
 235                                 struct hd_geometry *geo)
 236{
 237        struct mspro_block_data *msb = bdev->bd_disk->private_data;
 238
 239        geo->heads = msb->heads;
 240        geo->sectors = msb->sectors_per_track;
 241        geo->cylinders = msb->cylinders;
 242
 243        return 0;
 244}
 245
 246static const struct block_device_operations ms_block_bdops = {
 247        .open    = mspro_block_bd_open,
 248        .release = mspro_block_bd_release,
 249        .getgeo  = mspro_block_bd_getgeo,
 250        .owner   = THIS_MODULE
 251};
 252
 253/*** Information ***/
 254
 255static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
 256{
 257        struct device_attribute *dev_attr
 258                = container_of(attr, struct device_attribute, attr);
 259        return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
 260}
 261
 262static const char *mspro_block_attr_name(unsigned char tag)
 263{
 264        switch (tag) {
 265        case MSPRO_BLOCK_ID_SYSINFO:
 266                return "attr_sysinfo";
 267        case MSPRO_BLOCK_ID_MODELNAME:
 268                return "attr_modelname";
 269        case MSPRO_BLOCK_ID_MBR:
 270                return "attr_mbr";
 271        case MSPRO_BLOCK_ID_PBR16:
 272                return "attr_pbr16";
 273        case MSPRO_BLOCK_ID_PBR32:
 274                return "attr_pbr32";
 275        case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 276                return "attr_specfilevalues1";
 277        case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 278                return "attr_specfilevalues2";
 279        case MSPRO_BLOCK_ID_DEVINFO:
 280                return "attr_devinfo";
 281        default:
 282                return NULL;
 283        };
 284}
 285
 286typedef ssize_t (*sysfs_show_t)(struct device *dev,
 287                                struct device_attribute *attr,
 288                                char *buffer);
 289
 290static ssize_t mspro_block_attr_show_default(struct device *dev,
 291                                             struct device_attribute *attr,
 292                                             char *buffer)
 293{
 294        struct mspro_sys_attr *s_attr = container_of(attr,
 295                                                     struct mspro_sys_attr,
 296                                                     dev_attr);
 297
 298        ssize_t cnt, rc = 0;
 299
 300        for (cnt = 0; cnt < s_attr->size; cnt++) {
 301                if (cnt && !(cnt % 16)) {
 302                        if (PAGE_SIZE - rc)
 303                                buffer[rc++] = '\n';
 304                }
 305
 306                rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
 307                                ((unsigned char *)s_attr->data)[cnt]);
 308        }
 309        return rc;
 310}
 311
 312static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
 313                                             struct device_attribute *attr,
 314                                             char *buffer)
 315{
 316        struct mspro_sys_attr *x_attr = container_of(attr,
 317                                                     struct mspro_sys_attr,
 318                                                     dev_attr);
 319        struct mspro_sys_info *x_sys = x_attr->data;
 320        ssize_t rc = 0;
 321        int date_tz = 0, date_tz_f = 0;
 322
 323        if (x_sys->assembly_date[0] > 0x80U) {
 324                date_tz = (~x_sys->assembly_date[0]) + 1;
 325                date_tz_f = date_tz & 3;
 326                date_tz >>= 2;
 327                date_tz = -date_tz;
 328                date_tz_f *= 15;
 329        } else if (x_sys->assembly_date[0] < 0x80U) {
 330                date_tz = x_sys->assembly_date[0];
 331                date_tz_f = date_tz & 3;
 332                date_tz >>= 2;
 333                date_tz_f *= 15;
 334        }
 335
 336        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
 337                        x_sys->class);
 338        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
 339                        be16_to_cpu(x_sys->block_size));
 340        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
 341                        be16_to_cpu(x_sys->block_count));
 342        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
 343                        be16_to_cpu(x_sys->user_block_count));
 344        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
 345                        be16_to_cpu(x_sys->page_size));
 346        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
 347                        "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
 348                        date_tz, date_tz_f,
 349                        be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
 350                        x_sys->assembly_date[3], x_sys->assembly_date[4],
 351                        x_sys->assembly_date[5], x_sys->assembly_date[6],
 352                        x_sys->assembly_date[7]);
 353        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
 354                        be32_to_cpu(x_sys->serial_number));
 355        rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 356                        "assembly maker code: %x\n",
 357                        x_sys->assembly_maker_code);
 358        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
 359                        "%02x%02x%02x\n", x_sys->assembly_model_code[0],
 360                        x_sys->assembly_model_code[1],
 361                        x_sys->assembly_model_code[2]);
 362        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
 363                        be16_to_cpu(x_sys->memory_maker_code));
 364        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
 365                        be16_to_cpu(x_sys->memory_model_code));
 366        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
 367                        x_sys->vcc);
 368        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
 369                        x_sys->vpp);
 370        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
 371                        be16_to_cpu(x_sys->controller_number));
 372        rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 373                        "controller function: %x\n",
 374                        be16_to_cpu(x_sys->controller_function));
 375        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 376                        be16_to_cpu(x_sys->start_sector));
 377        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
 378                        be16_to_cpu(x_sys->unit_size));
 379        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
 380                        x_sys->ms_sub_class);
 381        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
 382                        x_sys->interface_type);
 383        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
 384                        be16_to_cpu(x_sys->controller_code));
 385        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
 386                        x_sys->format_type);
 387        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
 388                        x_sys->device_type);
 389        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
 390                        x_sys->mspro_id);
 391        return rc;
 392}
 393
 394static ssize_t mspro_block_attr_show_modelname(struct device *dev,
 395                                               struct device_attribute *attr,
 396                                               char *buffer)
 397{
 398        struct mspro_sys_attr *s_attr = container_of(attr,
 399                                                     struct mspro_sys_attr,
 400                                                     dev_attr);
 401
 402        return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
 403}
 404
 405static ssize_t mspro_block_attr_show_mbr(struct device *dev,
 406                                         struct device_attribute *attr,
 407                                         char *buffer)
 408{
 409        struct mspro_sys_attr *x_attr = container_of(attr,
 410                                                     struct mspro_sys_attr,
 411                                                     dev_attr);
 412        struct mspro_mbr *x_mbr = x_attr->data;
 413        ssize_t rc = 0;
 414
 415        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
 416                        x_mbr->boot_partition);
 417        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
 418                        x_mbr->start_head);
 419        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
 420                        x_mbr->start_sector);
 421        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
 422                        x_mbr->start_cylinder);
 423        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
 424                        x_mbr->partition_type);
 425        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
 426                        x_mbr->end_head);
 427        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
 428                        x_mbr->end_sector);
 429        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
 430                        x_mbr->end_cylinder);
 431        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
 432                        x_mbr->start_sectors);
 433        rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
 434                        "sectors per partition: %x\n",
 435                        x_mbr->sectors_per_partition);
 436        return rc;
 437}
 438
 439static ssize_t mspro_block_attr_show_specfile(struct device *dev,
 440                                              struct device_attribute *attr,
 441                                              char *buffer)
 442{
 443        struct mspro_sys_attr *x_attr = container_of(attr,
 444                                                     struct mspro_sys_attr,
 445                                                     dev_attr);
 446        struct mspro_specfile *x_spfile = x_attr->data;
 447        char name[9], ext[4];
 448        ssize_t rc = 0;
 449
 450        memcpy(name, x_spfile->name, 8);
 451        name[8] = 0;
 452        memcpy(ext, x_spfile->ext, 3);
 453        ext[3] = 0;
 454
 455        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
 456        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
 457        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
 458                        x_spfile->attr);
 459        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
 460                        x_spfile->time >> 11,
 461                        (x_spfile->time >> 5) & 0x3f,
 462                        (x_spfile->time & 0x1f) * 2);
 463        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
 464                        (x_spfile->date >> 9) + 1980,
 465                        (x_spfile->date >> 5) & 0xf,
 466                        x_spfile->date & 0x1f);
 467        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
 468                        x_spfile->cluster);
 469        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
 470                        x_spfile->size);
 471        return rc;
 472}
 473
 474static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
 475                                             struct device_attribute *attr,
 476                                             char *buffer)
 477{
 478        struct mspro_sys_attr *x_attr = container_of(attr,
 479                                                     struct mspro_sys_attr,
 480                                                     dev_attr);
 481        struct mspro_devinfo *x_devinfo = x_attr->data;
 482        ssize_t rc = 0;
 483
 484        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
 485                        be16_to_cpu(x_devinfo->cylinders));
 486        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
 487                        be16_to_cpu(x_devinfo->heads));
 488        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
 489                        be16_to_cpu(x_devinfo->bytes_per_track));
 490        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
 491                        be16_to_cpu(x_devinfo->bytes_per_sector));
 492        rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
 493                        be16_to_cpu(x_devinfo->sectors_per_track));
 494        return rc;
 495}
 496
 497static sysfs_show_t mspro_block_attr_show(unsigned char tag)
 498{
 499        switch (tag) {
 500        case MSPRO_BLOCK_ID_SYSINFO:
 501                return mspro_block_attr_show_sysinfo;
 502        case MSPRO_BLOCK_ID_MODELNAME:
 503                return mspro_block_attr_show_modelname;
 504        case MSPRO_BLOCK_ID_MBR:
 505                return mspro_block_attr_show_mbr;
 506        case MSPRO_BLOCK_ID_SPECFILEVALUES1:
 507        case MSPRO_BLOCK_ID_SPECFILEVALUES2:
 508                return mspro_block_attr_show_specfile;
 509        case MSPRO_BLOCK_ID_DEVINFO:
 510                return mspro_block_attr_show_devinfo;
 511        default:
 512                return mspro_block_attr_show_default;
 513        }
 514}
 515
 516/*** Protocol handlers ***/
 517
 518/*
 519 * Functions prefixed with "h_" are protocol callbacks. They can be called from
 520 * interrupt context. Return value of 0 means that request processing is still
 521 * ongoing, while special error value of -EAGAIN means that current request is
 522 * finished (and request processor should come back some time later).
 523 */
 524
 525static int h_mspro_block_req_init(struct memstick_dev *card,
 526                                  struct memstick_request **mrq)
 527{
 528        struct mspro_block_data *msb = memstick_get_drvdata(card);
 529
 530        *mrq = &card->current_mrq;
 531        card->next_request = msb->mrq_handler;
 532        return 0;
 533}
 534
 535static int h_mspro_block_default(struct memstick_dev *card,
 536                                 struct memstick_request **mrq)
 537{
 538        return mspro_block_complete_req(card, (*mrq)->error);
 539}
 540
 541static int h_mspro_block_default_bad(struct memstick_dev *card,
 542                                     struct memstick_request **mrq)
 543{
 544        return -ENXIO;
 545}
 546
 547static int h_mspro_block_get_ro(struct memstick_dev *card,
 548                                struct memstick_request **mrq)
 549{
 550        struct mspro_block_data *msb = memstick_get_drvdata(card);
 551
 552        if (!(*mrq)->error) {
 553                if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
 554                    & MEMSTICK_STATUS0_WP)
 555                        msb->read_only = 1;
 556                else
 557                        msb->read_only = 0;
 558        }
 559
 560        return mspro_block_complete_req(card, (*mrq)->error);
 561}
 562
 563static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
 564                                      struct memstick_request **mrq)
 565{
 566        dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
 567
 568        if (!(*mrq)->error) {
 569                if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
 570                        (*mrq)->error = -EFAULT;
 571                else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
 572                        return 0;
 573        }
 574
 575        return mspro_block_complete_req(card, (*mrq)->error);
 576}
 577
 578static int h_mspro_block_transfer_data(struct memstick_dev *card,
 579                                       struct memstick_request **mrq)
 580{
 581        struct mspro_block_data *msb = memstick_get_drvdata(card);
 582        unsigned char t_val = 0;
 583        struct scatterlist t_sg = { 0 };
 584        size_t t_offset;
 585
 586        if ((*mrq)->error)
 587                return mspro_block_complete_req(card, (*mrq)->error);
 588
 589        switch ((*mrq)->tpc) {
 590        case MS_TPC_WRITE_REG:
 591                memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
 592                (*mrq)->need_card_int = 1;
 593                return 0;
 594        case MS_TPC_SET_CMD:
 595                t_val = (*mrq)->int_reg;
 596                memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 597                if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
 598                        goto has_int_reg;
 599                return 0;
 600        case MS_TPC_GET_INT:
 601                t_val = (*mrq)->data[0];
 602has_int_reg:
 603                if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
 604                        t_val = MSPRO_CMD_STOP;
 605                        memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
 606                        card->next_request = h_mspro_block_default;
 607                        return 0;
 608                }
 609
 610                if (msb->current_page
 611                    == (msb->req_sg[msb->current_seg].length
 612                        / msb->page_size)) {
 613                        msb->current_page = 0;
 614                        msb->current_seg++;
 615
 616                        if (msb->current_seg == msb->seg_count) {
 617                                if (t_val & MEMSTICK_INT_CED) {
 618                                        return mspro_block_complete_req(card,
 619                                                                        0);
 620                                } else {
 621                                        card->next_request
 622                                                = h_mspro_block_wait_for_ced;
 623                                        memstick_init_req(*mrq, MS_TPC_GET_INT,
 624                                                          NULL, 1);
 625                                        return 0;
 626                                }
 627                        }
 628                }
 629
 630                if (!(t_val & MEMSTICK_INT_BREQ)) {
 631                        memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 632                        return 0;
 633                }
 634
 635                t_offset = msb->req_sg[msb->current_seg].offset;
 636                t_offset += msb->current_page * msb->page_size;
 637
 638                sg_set_page(&t_sg,
 639                            nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
 640                                     t_offset >> PAGE_SHIFT),
 641                            msb->page_size, offset_in_page(t_offset));
 642
 643                memstick_init_req_sg(*mrq, msb->data_dir == READ
 644                                           ? MS_TPC_READ_LONG_DATA
 645                                           : MS_TPC_WRITE_LONG_DATA,
 646                                     &t_sg);
 647                (*mrq)->need_card_int = 1;
 648                return 0;
 649        case MS_TPC_READ_LONG_DATA:
 650        case MS_TPC_WRITE_LONG_DATA:
 651                msb->current_page++;
 652                if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
 653                        t_val = (*mrq)->int_reg;
 654                        goto has_int_reg;
 655                } else {
 656                        memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
 657                        return 0;
 658                }
 659
 660        default:
 661                BUG();
 662        }
 663}
 664
 665/*** Transfer setup functions for different access methods. ***/
 666
 667/** Setup data transfer request for SET_CMD TPC with arguments in card
 668 *  registers.
 669 *
 670 *  @card    Current media instance
 671 *  @offset  Target data offset in bytes
 672 *  @length  Required transfer length in bytes.
 673 */
 674static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
 675                                    size_t length)
 676{
 677        struct mspro_block_data *msb = memstick_get_drvdata(card);
 678        struct mspro_param_register param = {
 679                .system = msb->system,
 680                .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
 681                /* ISO C90 warning precludes direct initialization for now. */
 682                .data_address = 0,
 683                .tpc_param = 0
 684        };
 685
 686        do_div(offset, msb->page_size);
 687        param.data_address = cpu_to_be32((uint32_t)offset);
 688
 689        card->next_request = h_mspro_block_req_init;
 690        msb->mrq_handler = h_mspro_block_transfer_data;
 691        memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
 692                          &param, sizeof(param));
 693}
 694
 695/*** Data transfer ***/
 696
 697static int mspro_block_issue_req(struct memstick_dev *card, int chunk)
 698{
 699        struct mspro_block_data *msb = memstick_get_drvdata(card);
 700        u64 t_off;
 701        unsigned int count;
 702
 703try_again:
 704        while (chunk) {
 705                msb->current_page = 0;
 706                msb->current_seg = 0;
 707                msb->seg_count = blk_rq_map_sg(msb->block_req->q,
 708                                               msb->block_req,
 709                                               msb->req_sg);
 710
 711                if (!msb->seg_count) {
 712                        chunk = __blk_end_request_cur(msb->block_req,
 713                                        BLK_STS_RESOURCE);
 714                        continue;
 715                }
 716
 717                t_off = blk_rq_pos(msb->block_req);
 718                t_off <<= 9;
 719                count = blk_rq_bytes(msb->block_req);
 720
 721                msb->setup_transfer(card, t_off, count);
 722
 723                msb->data_dir = rq_data_dir(msb->block_req);
 724                msb->transfer_cmd = msb->data_dir == READ
 725                                    ? MSPRO_CMD_READ_DATA
 726                                    : MSPRO_CMD_WRITE_DATA;
 727
 728                memstick_new_req(card->host);
 729                return 0;
 730        }
 731
 732        dev_dbg(&card->dev, "blk_fetch\n");
 733        msb->block_req = blk_fetch_request(msb->queue);
 734        if (!msb->block_req) {
 735                dev_dbg(&card->dev, "issue end\n");
 736                return -EAGAIN;
 737        }
 738
 739        dev_dbg(&card->dev, "trying again\n");
 740        chunk = 1;
 741        goto try_again;
 742}
 743
 744static int mspro_block_complete_req(struct memstick_dev *card, int error)
 745{
 746        struct mspro_block_data *msb = memstick_get_drvdata(card);
 747        int chunk, cnt;
 748        unsigned int t_len = 0;
 749        unsigned long flags;
 750
 751        spin_lock_irqsave(&msb->q_lock, flags);
 752        dev_dbg(&card->dev, "complete %d, %d\n", msb->has_request ? 1 : 0,
 753                error);
 754
 755        if (msb->has_request) {
 756                /* Nothing to do - not really an error */
 757                if (error == -EAGAIN)
 758                        error = 0;
 759
 760                if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
 761                        if (msb->data_dir == READ) {
 762                                for (cnt = 0; cnt < msb->current_seg; cnt++) {
 763                                        t_len += msb->req_sg[cnt].length
 764                                                 / msb->page_size;
 765
 766                                        if (msb->current_page)
 767                                                t_len += msb->current_page - 1;
 768
 769                                        t_len *= msb->page_size;
 770                                }
 771                        }
 772                } else
 773                        t_len = blk_rq_bytes(msb->block_req);
 774
 775                dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
 776
 777                if (error && !t_len)
 778                        t_len = blk_rq_cur_bytes(msb->block_req);
 779
 780                chunk = __blk_end_request(msb->block_req,
 781                                errno_to_blk_status(error), t_len);
 782
 783                error = mspro_block_issue_req(card, chunk);
 784
 785                if (!error)
 786                        goto out;
 787                else
 788                        msb->has_request = 0;
 789        } else {
 790                if (!error)
 791                        error = -EAGAIN;
 792        }
 793
 794        card->next_request = h_mspro_block_default_bad;
 795        complete_all(&card->mrq_complete);
 796out:
 797        spin_unlock_irqrestore(&msb->q_lock, flags);
 798        return error;
 799}
 800
 801static void mspro_block_stop(struct memstick_dev *card)
 802{
 803        struct mspro_block_data *msb = memstick_get_drvdata(card);
 804        int rc = 0;
 805        unsigned long flags;
 806
 807        while (1) {
 808                spin_lock_irqsave(&msb->q_lock, flags);
 809                if (!msb->has_request) {
 810                        blk_stop_queue(msb->queue);
 811                        rc = 1;
 812                }
 813                spin_unlock_irqrestore(&msb->q_lock, flags);
 814
 815                if (rc)
 816                        break;
 817
 818                wait_for_completion(&card->mrq_complete);
 819        }
 820}
 821
 822static void mspro_block_start(struct memstick_dev *card)
 823{
 824        struct mspro_block_data *msb = memstick_get_drvdata(card);
 825        unsigned long flags;
 826
 827        spin_lock_irqsave(&msb->q_lock, flags);
 828        blk_start_queue(msb->queue);
 829        spin_unlock_irqrestore(&msb->q_lock, flags);
 830}
 831
 832static void mspro_block_submit_req(struct request_queue *q)
 833{
 834        struct memstick_dev *card = q->queuedata;
 835        struct mspro_block_data *msb = memstick_get_drvdata(card);
 836        struct request *req = NULL;
 837
 838        if (msb->has_request)
 839                return;
 840
 841        if (msb->eject) {
 842                while ((req = blk_fetch_request(q)) != NULL)
 843                        __blk_end_request_all(req, BLK_STS_IOERR);
 844
 845                return;
 846        }
 847
 848        msb->has_request = 1;
 849        if (mspro_block_issue_req(card, 0))
 850                msb->has_request = 0;
 851}
 852
 853/*** Initialization ***/
 854
 855static int mspro_block_wait_for_ced(struct memstick_dev *card)
 856{
 857        struct mspro_block_data *msb = memstick_get_drvdata(card);
 858
 859        card->next_request = h_mspro_block_req_init;
 860        msb->mrq_handler = h_mspro_block_wait_for_ced;
 861        memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 862        memstick_new_req(card->host);
 863        wait_for_completion(&card->mrq_complete);
 864        return card->current_mrq.error;
 865}
 866
 867static int mspro_block_set_interface(struct memstick_dev *card,
 868                                     unsigned char sys_reg)
 869{
 870        struct memstick_host *host = card->host;
 871        struct mspro_block_data *msb = memstick_get_drvdata(card);
 872        struct mspro_param_register param = {
 873                .system = sys_reg,
 874                .data_count = 0,
 875                .data_address = 0,
 876                .tpc_param = 0
 877        };
 878
 879        card->next_request = h_mspro_block_req_init;
 880        msb->mrq_handler = h_mspro_block_default;
 881        memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
 882                          sizeof(param));
 883        memstick_new_req(host);
 884        wait_for_completion(&card->mrq_complete);
 885        return card->current_mrq.error;
 886}
 887
 888static int mspro_block_switch_interface(struct memstick_dev *card)
 889{
 890        struct memstick_host *host = card->host;
 891        struct mspro_block_data *msb = memstick_get_drvdata(card);
 892        int rc = 0;
 893
 894try_again:
 895        if (msb->caps & MEMSTICK_CAP_PAR4)
 896                rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
 897        else
 898                return 0;
 899
 900        if (rc) {
 901                printk(KERN_WARNING
 902                       "%s: could not switch to 4-bit mode, error %d\n",
 903                       dev_name(&card->dev), rc);
 904                return 0;
 905        }
 906
 907        msb->system = MEMSTICK_SYS_PAR4;
 908        host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
 909        printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
 910               dev_name(&card->dev));
 911
 912        if (msb->caps & MEMSTICK_CAP_PAR8) {
 913                rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
 914
 915                if (!rc) {
 916                        msb->system = MEMSTICK_SYS_PAR8;
 917                        host->set_param(host, MEMSTICK_INTERFACE,
 918                                        MEMSTICK_PAR8);
 919                        printk(KERN_INFO
 920                               "%s: switching to 8-bit parallel mode\n",
 921                               dev_name(&card->dev));
 922                } else
 923                        printk(KERN_WARNING
 924                               "%s: could not switch to 8-bit mode, error %d\n",
 925                               dev_name(&card->dev), rc);
 926        }
 927
 928        card->next_request = h_mspro_block_req_init;
 929        msb->mrq_handler = h_mspro_block_default;
 930        memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
 931        memstick_new_req(card->host);
 932        wait_for_completion(&card->mrq_complete);
 933        rc = card->current_mrq.error;
 934
 935        if (rc) {
 936                printk(KERN_WARNING
 937                       "%s: interface error, trying to fall back to serial\n",
 938                       dev_name(&card->dev));
 939                msb->system = MEMSTICK_SYS_SERIAL;
 940                host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
 941                msleep(10);
 942                host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
 943                host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
 944
 945                rc = memstick_set_rw_addr(card);
 946                if (!rc)
 947                        rc = mspro_block_set_interface(card, msb->system);
 948
 949                if (!rc) {
 950                        msleep(150);
 951                        rc = mspro_block_wait_for_ced(card);
 952                        if (rc)
 953                                return rc;
 954
 955                        if (msb->caps & MEMSTICK_CAP_PAR8) {
 956                                msb->caps &= ~MEMSTICK_CAP_PAR8;
 957                                goto try_again;
 958                        }
 959                }
 960        }
 961        return rc;
 962}
 963
 964/* Memory allocated for attributes by this function should be freed by
 965 * mspro_block_data_clear, no matter if the initialization process succeeded
 966 * or failed.
 967 */
 968static int mspro_block_read_attributes(struct memstick_dev *card)
 969{
 970        struct mspro_block_data *msb = memstick_get_drvdata(card);
 971        struct mspro_attribute *attr = NULL;
 972        struct mspro_sys_attr *s_attr = NULL;
 973        unsigned char *buffer = NULL;
 974        int cnt, rc, attr_count;
 975        /* While normally physical device offsets, represented here by
 976         * attr_offset and attr_len will be of large numeric types, we can be
 977         * sure, that attributes are close enough to the beginning of the
 978         * device, to save ourselves some trouble.
 979         */
 980        unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
 981
 982        attr = kmalloc(msb->page_size, GFP_KERNEL);
 983        if (!attr)
 984                return -ENOMEM;
 985
 986        sg_init_one(&msb->req_sg[0], attr, msb->page_size);
 987        msb->seg_count = 1;
 988        msb->current_seg = 0;
 989        msb->current_page = 0;
 990        msb->data_dir = READ;
 991        msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
 992
 993        msb->setup_transfer(card, attr_offset, attr_len);
 994
 995        memstick_new_req(card->host);
 996        wait_for_completion(&card->mrq_complete);
 997        if (card->current_mrq.error) {
 998                rc = card->current_mrq.error;
 999                goto out_free_attr;
1000        }
1001
1002        if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
1003                printk(KERN_ERR "%s: unrecognized device signature %x\n",
1004                       dev_name(&card->dev), be16_to_cpu(attr->signature));
1005                rc = -ENODEV;
1006                goto out_free_attr;
1007        }
1008
1009        if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
1010                printk(KERN_WARNING "%s: way too many attribute entries\n",
1011                       dev_name(&card->dev));
1012                attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
1013        } else
1014                attr_count = attr->count;
1015
1016        msb->attr_group.attrs = kcalloc(attr_count + 1,
1017                                        sizeof(*msb->attr_group.attrs),
1018                                        GFP_KERNEL);
1019        if (!msb->attr_group.attrs) {
1020                rc = -ENOMEM;
1021                goto out_free_attr;
1022        }
1023        msb->attr_group.name = "media_attributes";
1024
1025        buffer = kmemdup(attr, attr_len, GFP_KERNEL);
1026        if (!buffer) {
1027                rc = -ENOMEM;
1028                goto out_free_attr;
1029        }
1030
1031        for (cnt = 0; cnt < attr_count; ++cnt) {
1032                s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
1033                if (!s_attr) {
1034                        rc = -ENOMEM;
1035                        goto out_free_buffer;
1036                }
1037
1038                msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1039                addr = be32_to_cpu(attr->entries[cnt].address);
1040                s_attr->size = be32_to_cpu(attr->entries[cnt].size);
1041                dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
1042                        "size %zx\n", cnt, attr->entries[cnt].id, addr,
1043                        s_attr->size);
1044                s_attr->id = attr->entries[cnt].id;
1045                if (mspro_block_attr_name(s_attr->id))
1046                        snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1047                                 mspro_block_attr_name(attr->entries[cnt].id));
1048                else
1049                        snprintf(s_attr->name, sizeof(s_attr->name),
1050                                 "attr_x%02x", attr->entries[cnt].id);
1051
1052                sysfs_attr_init(&s_attr->dev_attr.attr);
1053                s_attr->dev_attr.attr.name = s_attr->name;
1054                s_attr->dev_attr.attr.mode = S_IRUGO;
1055                s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1056
1057                if (!s_attr->size)
1058                        continue;
1059
1060                s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
1061                if (!s_attr->data) {
1062                        rc = -ENOMEM;
1063                        goto out_free_buffer;
1064                }
1065
1066                if (((addr / msb->page_size) == (attr_offset / msb->page_size))
1067                    && (((addr + s_attr->size - 1) / msb->page_size)
1068                        == (attr_offset / msb->page_size))) {
1069                        memcpy(s_attr->data, buffer + addr % msb->page_size,
1070                               s_attr->size);
1071                        continue;
1072                }
1073
1074                attr_offset = (addr / msb->page_size) * msb->page_size;
1075
1076                if ((attr_offset + attr_len) < (addr + s_attr->size)) {
1077                        kfree(buffer);
1078                        attr_len = (((addr + s_attr->size) / msb->page_size)
1079                                    + 1 ) * msb->page_size - attr_offset;
1080                        buffer = kmalloc(attr_len, GFP_KERNEL);
1081                        if (!buffer) {
1082                                rc = -ENOMEM;
1083                                goto out_free_attr;
1084                        }
1085                }
1086
1087                sg_init_one(&msb->req_sg[0], buffer, attr_len);
1088                msb->seg_count = 1;
1089                msb->current_seg = 0;
1090                msb->current_page = 0;
1091                msb->data_dir = READ;
1092                msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1093
1094                dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1095                        attr_offset, attr_len);
1096
1097                msb->setup_transfer(card, attr_offset, attr_len);
1098                memstick_new_req(card->host);
1099                wait_for_completion(&card->mrq_complete);
1100                if (card->current_mrq.error) {
1101                        rc = card->current_mrq.error;
1102                        goto out_free_buffer;
1103                }
1104
1105                memcpy(s_attr->data, buffer + addr % msb->page_size,
1106                       s_attr->size);
1107        }
1108
1109        rc = 0;
1110out_free_buffer:
1111        kfree(buffer);
1112out_free_attr:
1113        kfree(attr);
1114        return rc;
1115}
1116
1117static int mspro_block_init_card(struct memstick_dev *card)
1118{
1119        struct mspro_block_data *msb = memstick_get_drvdata(card);
1120        struct memstick_host *host = card->host;
1121        int rc = 0;
1122
1123        msb->system = MEMSTICK_SYS_SERIAL;
1124        msb->setup_transfer = h_mspro_block_setup_cmd;
1125
1126        card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1127        card->reg_addr.r_length = sizeof(struct ms_status_register);
1128        card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1129        card->reg_addr.w_length = sizeof(struct mspro_param_register);
1130
1131        if (memstick_set_rw_addr(card))
1132                return -EIO;
1133
1134        msb->caps = host->caps;
1135
1136        msleep(150);
1137        rc = mspro_block_wait_for_ced(card);
1138        if (rc)
1139                return rc;
1140
1141        rc = mspro_block_switch_interface(card);
1142        if (rc)
1143                return rc;
1144
1145        dev_dbg(&card->dev, "card activated\n");
1146        if (msb->system != MEMSTICK_SYS_SERIAL)
1147                msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
1148
1149        card->next_request = h_mspro_block_req_init;
1150        msb->mrq_handler = h_mspro_block_get_ro;
1151        memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1152                          sizeof(struct ms_status_register));
1153        memstick_new_req(card->host);
1154        wait_for_completion(&card->mrq_complete);
1155        if (card->current_mrq.error)
1156                return card->current_mrq.error;
1157
1158        dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1159
1160        msb->page_size = 512;
1161        rc = mspro_block_read_attributes(card);
1162        if (rc)
1163                return rc;
1164
1165        dev_dbg(&card->dev, "attributes loaded\n");
1166        return 0;
1167
1168}
1169
1170static int mspro_block_init_disk(struct memstick_dev *card)
1171{
1172        struct mspro_block_data *msb = memstick_get_drvdata(card);
1173        struct memstick_host *host = card->host;
1174        struct mspro_devinfo *dev_info = NULL;
1175        struct mspro_sys_info *sys_info = NULL;
1176        struct mspro_sys_attr *s_attr = NULL;
1177        int rc, disk_id;
1178        u64 limit = BLK_BOUNCE_HIGH;
1179        unsigned long capacity;
1180
1181        if (host->dev.dma_mask && *(host->dev.dma_mask))
1182                limit = *(host->dev.dma_mask);
1183
1184        for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1185                s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1186
1187                if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1188                        dev_info = s_attr->data;
1189                else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1190                        sys_info = s_attr->data;
1191        }
1192
1193        if (!dev_info || !sys_info)
1194                return -ENODEV;
1195
1196        msb->cylinders = be16_to_cpu(dev_info->cylinders);
1197        msb->heads = be16_to_cpu(dev_info->heads);
1198        msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1199
1200        msb->page_size = be16_to_cpu(sys_info->unit_size);
1201
1202        mutex_lock(&mspro_block_disk_lock);
1203        disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
1204        mutex_unlock(&mspro_block_disk_lock);
1205        if (disk_id < 0)
1206                return disk_id;
1207
1208        msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
1209        if (!msb->disk) {
1210                rc = -ENOMEM;
1211                goto out_release_id;
1212        }
1213
1214        msb->queue = blk_init_queue(mspro_block_submit_req, &msb->q_lock);
1215        if (!msb->queue) {
1216                rc = -ENOMEM;
1217                goto out_put_disk;
1218        }
1219
1220        msb->queue->queuedata = card;
1221
1222        blk_queue_bounce_limit(msb->queue, limit);
1223        blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
1224        blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
1225        blk_queue_max_segment_size(msb->queue,
1226                                   MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1227
1228        msb->disk->major = major;
1229        msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
1230        msb->disk->fops = &ms_block_bdops;
1231        msb->usage_count = 1;
1232        msb->disk->private_data = msb;
1233        msb->disk->queue = msb->queue;
1234
1235        sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1236
1237        blk_queue_logical_block_size(msb->queue, msb->page_size);
1238
1239        capacity = be16_to_cpu(sys_info->user_block_count);
1240        capacity *= be16_to_cpu(sys_info->block_size);
1241        capacity *= msb->page_size >> 9;
1242        set_capacity(msb->disk, capacity);
1243        dev_dbg(&card->dev, "capacity set %ld\n", capacity);
1244
1245        device_add_disk(&card->dev, msb->disk);
1246        msb->active = 1;
1247        return 0;
1248
1249out_put_disk:
1250        put_disk(msb->disk);
1251out_release_id:
1252        mutex_lock(&mspro_block_disk_lock);
1253        idr_remove(&mspro_block_disk_idr, disk_id);
1254        mutex_unlock(&mspro_block_disk_lock);
1255        return rc;
1256}
1257
1258static void mspro_block_data_clear(struct mspro_block_data *msb)
1259{
1260        int cnt;
1261        struct mspro_sys_attr *s_attr;
1262
1263        if (msb->attr_group.attrs) {
1264                for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1265                        s_attr = mspro_from_sysfs_attr(msb->attr_group
1266                                                           .attrs[cnt]);
1267                        kfree(s_attr->data);
1268                        kfree(s_attr);
1269                }
1270                kfree(msb->attr_group.attrs);
1271        }
1272
1273        msb->card = NULL;
1274}
1275
1276static int mspro_block_check_card(struct memstick_dev *card)
1277{
1278        struct mspro_block_data *msb = memstick_get_drvdata(card);
1279
1280        return (msb->active == 1);
1281}
1282
1283static int mspro_block_probe(struct memstick_dev *card)
1284{
1285        struct mspro_block_data *msb;
1286        int rc = 0;
1287
1288        msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1289        if (!msb)
1290                return -ENOMEM;
1291        memstick_set_drvdata(card, msb);
1292        msb->card = card;
1293        spin_lock_init(&msb->q_lock);
1294
1295        rc = mspro_block_init_card(card);
1296
1297        if (rc)
1298                goto out_free;
1299
1300        rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1301        if (rc)
1302                goto out_free;
1303
1304        rc = mspro_block_init_disk(card);
1305        if (!rc) {
1306                card->check = mspro_block_check_card;
1307                card->stop = mspro_block_stop;
1308                card->start = mspro_block_start;
1309                return 0;
1310        }
1311
1312        sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1313out_free:
1314        memstick_set_drvdata(card, NULL);
1315        mspro_block_data_clear(msb);
1316        kfree(msb);
1317        return rc;
1318}
1319
1320static void mspro_block_remove(struct memstick_dev *card)
1321{
1322        struct mspro_block_data *msb = memstick_get_drvdata(card);
1323        unsigned long flags;
1324
1325        spin_lock_irqsave(&msb->q_lock, flags);
1326        msb->eject = 1;
1327        blk_start_queue(msb->queue);
1328        spin_unlock_irqrestore(&msb->q_lock, flags);
1329
1330        del_gendisk(msb->disk);
1331        dev_dbg(&card->dev, "mspro block remove\n");
1332
1333        blk_cleanup_queue(msb->queue);
1334        msb->queue = NULL;
1335
1336        sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1337
1338        mutex_lock(&mspro_block_disk_lock);
1339        mspro_block_data_clear(msb);
1340        mutex_unlock(&mspro_block_disk_lock);
1341
1342        mspro_block_disk_release(msb->disk);
1343        memstick_set_drvdata(card, NULL);
1344}
1345
1346#ifdef CONFIG_PM
1347
1348static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1349{
1350        struct mspro_block_data *msb = memstick_get_drvdata(card);
1351        unsigned long flags;
1352
1353        spin_lock_irqsave(&msb->q_lock, flags);
1354        blk_stop_queue(msb->queue);
1355        msb->active = 0;
1356        spin_unlock_irqrestore(&msb->q_lock, flags);
1357
1358        return 0;
1359}
1360
1361static int mspro_block_resume(struct memstick_dev *card)
1362{
1363        struct mspro_block_data *msb = memstick_get_drvdata(card);
1364        unsigned long flags;
1365        int rc = 0;
1366
1367#ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1368
1369        struct mspro_block_data *new_msb;
1370        struct memstick_host *host = card->host;
1371        struct mspro_sys_attr *s_attr, *r_attr;
1372        unsigned char cnt;
1373
1374        mutex_lock(&host->lock);
1375        new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1376        if (!new_msb) {
1377                rc = -ENOMEM;
1378                goto out_unlock;
1379        }
1380
1381        new_msb->card = card;
1382        memstick_set_drvdata(card, new_msb);
1383        if (mspro_block_init_card(card))
1384                goto out_free;
1385
1386        for (cnt = 0; new_msb->attr_group.attrs[cnt]
1387                      && msb->attr_group.attrs[cnt]; ++cnt) {
1388                s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1389                r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1390
1391                if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1392                    && r_attr->id == s_attr->id) {
1393                        if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1394                                break;
1395
1396                        msb->active = 1;
1397                        break;
1398                }
1399        }
1400
1401out_free:
1402        memstick_set_drvdata(card, msb);
1403        mspro_block_data_clear(new_msb);
1404        kfree(new_msb);
1405out_unlock:
1406        mutex_unlock(&host->lock);
1407
1408#endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1409
1410        spin_lock_irqsave(&msb->q_lock, flags);
1411        blk_start_queue(msb->queue);
1412        spin_unlock_irqrestore(&msb->q_lock, flags);
1413        return rc;
1414}
1415
1416#else
1417
1418#define mspro_block_suspend NULL
1419#define mspro_block_resume NULL
1420
1421#endif /* CONFIG_PM */
1422
1423static struct memstick_device_id mspro_block_id_tbl[] = {
1424        {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
1425         MEMSTICK_CLASS_DUO},
1426        {}
1427};
1428
1429
1430static struct memstick_driver mspro_block_driver = {
1431        .driver = {
1432                .name  = DRIVER_NAME,
1433                .owner = THIS_MODULE
1434        },
1435        .id_table = mspro_block_id_tbl,
1436        .probe    = mspro_block_probe,
1437        .remove   = mspro_block_remove,
1438        .suspend  = mspro_block_suspend,
1439        .resume   = mspro_block_resume
1440};
1441
1442static int __init mspro_block_init(void)
1443{
1444        int rc = -ENOMEM;
1445
1446        rc = register_blkdev(major, DRIVER_NAME);
1447        if (rc < 0) {
1448                printk(KERN_ERR DRIVER_NAME ": failed to register "
1449                       "major %d, error %d\n", major, rc);
1450                return rc;
1451        }
1452        if (!major)
1453                major = rc;
1454
1455        rc = memstick_register_driver(&mspro_block_driver);
1456        if (rc)
1457                unregister_blkdev(major, DRIVER_NAME);
1458        return rc;
1459}
1460
1461static void __exit mspro_block_exit(void)
1462{
1463        memstick_unregister_driver(&mspro_block_driver);
1464        unregister_blkdev(major, DRIVER_NAME);
1465        idr_destroy(&mspro_block_disk_idr);
1466}
1467
1468module_init(mspro_block_init);
1469module_exit(mspro_block_exit);
1470
1471MODULE_LICENSE("GPL");
1472MODULE_AUTHOR("Alex Dubov");
1473MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1474MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);
1475