drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define DRV_NAME "ide-floppy"
  19
  20 #define IDEFLOPPY_VERSION "1.00"
  21
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/string.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/timer.h>
  28 #include <linux/mm.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/major.h>
  31 #include <linux/errno.h>
  32 #include <linux/genhd.h>
  33 #include <linux/slab.h>
  34 #include <linux/cdrom.h>
  35 #include <linux/ide.h>
  36 #include <linux/hdreg.h>
  37 #include <linux/bitops.h>
  38 #include <linux/mutex.h>
  39 #include <linux/scatterlist.h>
  40
  41 #include <scsi/scsi_ioctl.h>
  42
  43 #include <asm/byteorder.h>
  44 #include <linux/irq.h>
  45 #include <linux/uaccess.h>
  46 #include <linux/io.h>
  47 #include <asm/unaligned.h>
  48
  49 /* define to see debug info */
  50 #define IDEFLOPPY_DEBUG_LOG             0
  51
  52 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  53 #define IDEFLOPPY_DEBUG(fmt, args...)
  54
  55 #if IDEFLOPPY_DEBUG_LOG
  56 #define debug_log(fmt, args...) \
  57         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  58 #else
  59 #define debug_log(fmt, args...) do {} while (0)
  60 #endif
  61
  62
  63 /* Some drives require a longer irq timeout. */
  64 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  65
  66 /*
  67  * After each failed packet command we issue a request sense command and retry
  68  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  69  */
  70 #define IDEFLOPPY_MAX_PC_RETRIES        3
  71
  72 /* format capacities descriptor codes */
  73 #define CAPACITY_INVALID        0x00
  74 #define CAPACITY_UNFORMATTED    0x01
  75 #define CAPACITY_CURRENT        0x02
  76 #define CAPACITY_NO_CARTRIDGE   0x03
  77
  78 /*
  79  * Most of our global data which we need to save even as we leave the driver
  80  * due to an interrupt or a timer event is stored in a variable of type
  81  * idefloppy_floppy_t, defined below.
  82  */
  83 typedef struct ide_floppy_obj {
  84         ide_drive_t     *drive;
  85         ide_driver_t    *driver;
  86         struct gendisk  *disk;
  87         struct kref     kref;
  88         unsigned int    openers;        /* protected by BKL for now */
  89
  90         /* Current packet command */
  91         struct ide_atapi_pc *pc;
  92         /* Last failed packet command */
  93         struct ide_atapi_pc *failed_pc;
  94         /* used for blk_{fs,pc}_request() requests */
  95         struct ide_atapi_pc queued_pc;
  96
  97         struct ide_atapi_pc request_sense_pc;
  98         struct request request_sense_rq;
  99
 100         /* Last error information */
 101         u8 sense_key, asc, ascq;
 102         /* delay this long before sending packet command */
 103         u8 ticks;
 104         int progress_indication;
 105
 106         /* Device information */
 107         /* Current format */
 108         int blocks, block_size, bs_factor;
 109         /* Last format capacity descriptor */
 110         u8 cap_desc[8];
 111         /* Copy of the flexible disk page */
 112         u8 flexible_disk_page[32];
 113 } idefloppy_floppy_t;
 114
 115 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 116
 117 /* IOCTLs used in low-level formatting. */
 118 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 119 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 120 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 121 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 122
 123 /* Error code returned in rq->errors to the higher part of the driver. */
 124 #define IDEFLOPPY_ERROR_GENERAL         101
 125
 126 /*
 127  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 128  * See SFF-8070i spec.
 129  */
 130 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 131 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 132
 133 static DEFINE_MUTEX(idefloppy_ref_mutex);
 134
 135 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 136
 137 #define ide_floppy_g(disk) \
 138         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 139
 140 static void idefloppy_cleanup_obj(struct kref *);
 141
 142 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 143 {
 144         struct ide_floppy_obj *floppy = NULL;
 145
 146         mutex_lock(&idefloppy_ref_mutex);
 147         floppy = ide_floppy_g(disk);
 148         if (floppy) {
 149                 if (ide_device_get(floppy->drive))
 150                         floppy = NULL;
 151                 else
 152                         kref_get(&floppy->kref);
 153         }
 154         mutex_unlock(&idefloppy_ref_mutex);
 155         return floppy;
 156 }
 157
 158 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 159 {
 160         ide_drive_t *drive = floppy->drive;
 161
 162         mutex_lock(&idefloppy_ref_mutex);
 163         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 164         ide_device_put(drive);
 165         mutex_unlock(&idefloppy_ref_mutex);
 166 }
 167
 168 /*
 169  * Used to finish servicing a request. For read/write requests, we will call
 170  * ide_end_request to pass to the next buffer.
 171  */
 172 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 173 {
 174         idefloppy_floppy_t *floppy = drive->driver_data;
 175         struct request *rq = HWGROUP(drive)->rq;
 176         int error;
 177
 178         debug_log("Reached %s\n", __func__);
 179
 180         switch (uptodate) {
 181         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 182         case 1: error = 0; break;
 183         default: error = uptodate;
 184         }
 185         if (error)
 186                 floppy->failed_pc = NULL;
 187         /* Why does this happen? */
 188         if (!rq)
 189                 return 0;
 190         if (!blk_special_request(rq)) {
 191                 /* our real local end request function */
 192                 ide_end_request(drive, uptodate, nsecs);
 193                 return 0;
 194         }
 195         rq->errors = error;
 196         /* fixme: need to move this local also */
 197         ide_end_drive_cmd(drive, 0, 0);
 198         return 0;
 199 }
 200
 201 static void idefloppy_update_buffers(ide_drive_t *drive,
 202                                 struct ide_atapi_pc *pc)
 203 {
 204         struct request *rq = pc->rq;
 205         struct bio *bio = rq->bio;
 206
 207         while ((bio = rq->bio) != NULL)
 208                 idefloppy_end_request(drive, 1, 0);
 209 }
 210
 211 static void ide_floppy_callback(ide_drive_t *drive)
 212 {
 213         idefloppy_floppy_t *floppy = drive->driver_data;
 214         struct ide_atapi_pc *pc = floppy->pc;
 215         int uptodate = pc->error ? 0 : 1;
 216
 217         debug_log("Reached %s\n", __func__);
 218
 219         if (floppy->failed_pc == pc)
 220                 floppy->failed_pc = NULL;
 221
 222         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 223             (pc->rq && blk_pc_request(pc->rq)))
 224                 uptodate = 1; /* FIXME */
 225         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 226                 u8 *buf = floppy->pc->buf;
 227
 228                 if (!pc->error) {
 229                         floppy->sense_key = buf[2] & 0x0F;
 230                         floppy->asc = buf[12];
 231                         floppy->ascq = buf[13];
 232                         floppy->progress_indication = buf[15] & 0x80 ?
 233                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 234
 235                         if (floppy->failed_pc)
 236                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 237
 238                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 239                                   floppy->sense_key, floppy->asc, floppy->ascq);
 240                 } else
 241                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 242                                         "Aborting request!\n");
 243         }
 244
 245         idefloppy_end_request(drive, uptodate, 0);
 246 }
 247
 248 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 249 {
 250         ide_init_pc(pc);
 251         pc->c[0] = GPCMD_REQUEST_SENSE;
 252         pc->c[4] = 255;
 253         pc->req_xfer = 18;
 254 }
 255
 256 /*
 257  * Called when an error was detected during the last packet command. We queue a
 258  * request sense packet command in the head of the request list.
 259  */
 260 static void idefloppy_retry_pc(ide_drive_t *drive)
 261 {
 262         struct ide_floppy_obj *floppy = drive->driver_data;
 263         struct request *rq = &floppy->request_sense_rq;
 264         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
 265
 266         (void)ide_read_error(drive);
 267         idefloppy_create_request_sense_cmd(pc);
 268         ide_queue_pc_head(drive, floppy->disk, pc, rq);
 269 }
 270
 271 /* The usual interrupt handler called during a packet command. */
 272 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 273 {
 274         idefloppy_floppy_t *floppy = drive->driver_data;
 275
 276         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 277                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 278                            idefloppy_retry_pc, NULL, ide_io_buffers);
 279 }
 280
 281 /*
 282  * What we have here is a classic case of a top half / bottom half interrupt
 283  * service routine. In interrupt mode, the device sends an interrupt to signal
 284  * that it is ready to receive a packet. However, we need to delay about 2-3
 285  * ticks before issuing the packet or we gets in trouble.
 286  */
 287 static int idefloppy_transfer_pc(ide_drive_t *drive)
 288 {
 289         idefloppy_floppy_t *floppy = drive->driver_data;
 290
 291         /* Send the actual packet */
 292         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 293
 294         /* Timeout for the packet command */
 295         return IDEFLOPPY_WAIT_CMD;
 296 }
 297
 298
 299 /*
 300  * Called as an interrupt (or directly). When the device says it's ready for a
 301  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 302  * transfer_pc.
 303  */
 304 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 305 {
 306         idefloppy_floppy_t *floppy = drive->driver_data;
 307         struct ide_atapi_pc *pc = floppy->pc;
 308         ide_expiry_t *expiry;
 309         unsigned int timeout;
 310
 311         /*
 312          * The following delay solves a problem with ATAPI Zip 100 drives
 313          * where the Busy flag was apparently being deasserted before the
 314          * unit was ready to receive data. This was happening on a
 315          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 316          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 317          * used until after the packet is moved in about 50 msec.
 318          */
 319         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 320                 timeout = floppy->ticks;
 321                 expiry = &idefloppy_transfer_pc;
 322         } else {
 323                 timeout = IDEFLOPPY_WAIT_CMD;
 324                 expiry = NULL;
 325         }
 326
 327         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 328 }
 329
 330 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 331                                     struct ide_atapi_pc *pc)
 332 {
 333         /* supress error messages resulting from Medium not present */
 334         if (floppy->sense_key == 0x02 &&
 335             floppy->asc       == 0x3a &&
 336             floppy->ascq      == 0x00)
 337                 return;
 338
 339         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 340                         "asc = %2x, ascq = %2x\n",
 341                         floppy->drive->name, pc->c[0], floppy->sense_key,
 342                         floppy->asc, floppy->ascq);
 343
 344 }
 345
 346 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 347                 struct ide_atapi_pc *pc)
 348 {
 349         idefloppy_floppy_t *floppy = drive->driver_data;
 350
 351         if (floppy->failed_pc == NULL &&
 352             pc->c[0] != GPCMD_REQUEST_SENSE)
 353                 floppy->failed_pc = pc;
 354         /* Set the current packet command */
 355         floppy->pc = pc;
 356
 357         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 358                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 359                         ide_floppy_report_error(floppy, pc);
 360                 /* Giving up */
 361                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 362
 363                 floppy->failed_pc = NULL;
 364                 drive->pc_callback(drive);
 365                 return ide_stopped;
 366         }
 367
 368         debug_log("Retry number - %d\n", pc->retries);
 369
 370         pc->retries++;
 371
 372         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 373                             IDEFLOPPY_WAIT_CMD, NULL);
 374 }
 375
 376 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 377 {
 378         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 379
 380         ide_init_pc(pc);
 381         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 382         pc->c[4] = prevent;
 383 }
 384
 385 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 386 {
 387         ide_init_pc(pc);
 388         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 389         pc->c[7] = 255;
 390         pc->c[8] = 255;
 391         pc->req_xfer = 255;
 392 }
 393
 394 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 395                 int l, int flags)
 396 {
 397         ide_init_pc(pc);
 398         pc->c[0] = GPCMD_FORMAT_UNIT;
 399         pc->c[1] = 0x17;
 400
 401         memset(pc->buf, 0, 12);
 402         pc->buf[1] = 0xA2;
 403         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 404
 405         if (flags & 1)                          /* Verify bit on... */
 406                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 407         pc->buf[3] = 8;
 408
 409         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 410         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 411         pc->buf_size = 12;
 412         pc->flags |= PC_FLAG_WRITING;
 413 }
 414
 415 /* A mode sense command is used to "sense" floppy parameters. */
 416 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 417                                             u8 page_code)
 418 {
 419         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 420
 421         ide_init_pc(pc);
 422         pc->c[0] = GPCMD_MODE_SENSE_10;
 423         pc->c[1] = 0;
 424         pc->c[2] = page_code;
 425
 426         switch (page_code) {
 427         case IDEFLOPPY_CAPABILITIES_PAGE:
 428                 length += 12;
 429                 break;
 430         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 431                 length += 32;
 432                 break;
 433         default:
 434                 printk(KERN_ERR "ide-floppy: unsupported page code "
 435                                 "in create_mode_sense_cmd\n");
 436         }
 437         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 438         pc->req_xfer = length;
 439 }
 440
 441 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 442 {
 443         ide_init_pc(pc);
 444         pc->c[0] = GPCMD_START_STOP_UNIT;
 445         pc->c[4] = start;
 446 }
 447
 448 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 449                                     struct ide_atapi_pc *pc, struct request *rq,
 450                                     unsigned long sector)
 451 {
 452         int block = sector / floppy->bs_factor;
 453         int blocks = rq->nr_sectors / floppy->bs_factor;
 454         int cmd = rq_data_dir(rq);
 455
 456         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 457                 block, blocks);
 458
 459         ide_init_pc(pc);
 460         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 461         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 462         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 463
 464         memcpy(rq->cmd, pc->c, 12);
 465
 466         pc->rq = rq;
 467         pc->b_count = 0;
 468         if (rq->cmd_flags & REQ_RW)
 469                 pc->flags |= PC_FLAG_WRITING;
 470         pc->buf = NULL;
 471         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 472         pc->flags |= PC_FLAG_DMA_OK;
 473 }
 474
 475 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 476                 struct ide_atapi_pc *pc, struct request *rq)
 477 {
 478         ide_init_pc(pc);
 479         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 480         pc->rq = rq;
 481         pc->b_count = 0;
 482         if (rq->data_len && rq_data_dir(rq) == WRITE)
 483                 pc->flags |= PC_FLAG_WRITING;
 484         pc->buf = rq->data;
 485         if (rq->bio)
 486                 pc->flags |= PC_FLAG_DMA_OK;
 487         /*
 488          * possibly problematic, doesn't look like ide-floppy correctly
 489          * handled scattered requests if dma fails...
 490          */
 491         pc->req_xfer = pc->buf_size = rq->data_len;
 492 }
 493
 494 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 495                 struct request *rq, sector_t block_s)
 496 {
 497         idefloppy_floppy_t *floppy = drive->driver_data;
 498         ide_hwif_t *hwif = drive->hwif;
 499         struct ide_atapi_pc *pc;
 500         unsigned long block = (unsigned long)block_s;
 501
 502         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 503                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 504                   rq->cmd[0], rq->cmd_type, rq->errors);
 505
 506         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 507                   __func__, (long)rq->sector, rq->nr_sectors,
 508                   rq->current_nr_sectors);
 509
 510         if (rq->errors >= ERROR_MAX) {
 511                 if (floppy->failed_pc)
 512                         ide_floppy_report_error(floppy, floppy->failed_pc);
 513                 else
 514                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 515                                 drive->name);
 516                 idefloppy_end_request(drive, 0, 0);
 517                 return ide_stopped;
 518         }
 519         if (blk_fs_request(rq)) {
 520                 if (((long)rq->sector % floppy->bs_factor) ||
 521                     (rq->nr_sectors % floppy->bs_factor)) {
 522                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 523                                         drive->name);
 524                         idefloppy_end_request(drive, 0, 0);
 525                         return ide_stopped;
 526                 }
 527                 pc = &floppy->queued_pc;
 528                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 529         } else if (blk_special_request(rq)) {
 530                 pc = (struct ide_atapi_pc *) rq->buffer;
 531         } else if (blk_pc_request(rq)) {
 532                 pc = &floppy->queued_pc;
 533                 idefloppy_blockpc_cmd(floppy, pc, rq);
 534         } else {
 535                 blk_dump_rq_flags(rq,
 536                         "ide-floppy: unsupported command in queue");
 537                 idefloppy_end_request(drive, 0, 0);
 538                 return ide_stopped;
 539         }
 540
 541         ide_init_sg_cmd(drive, rq);
 542         ide_map_sg(drive, rq);
 543
 544         pc->sg = hwif->sg_table;
 545         pc->sg_cnt = hwif->sg_nents;
 546
 547         pc->rq = rq;
 548
 549         return idefloppy_issue_pc(drive, pc);
 550 }
 551
 552 /*
 553  * Look at the flexible disk page parameters. We ignore the CHS capacity
 554  * parameters and use the LBA parameters instead.
 555  */
 556 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 557 {
 558         idefloppy_floppy_t *floppy = drive->driver_data;
 559         struct gendisk *disk = floppy->disk;
 560         struct ide_atapi_pc pc;
 561         u8 *page;
 562         int capacity, lba_capacity;
 563         u16 transfer_rate, sector_size, cyls, rpm;
 564         u8 heads, sectors;
 565
 566         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 567
 568         if (ide_queue_pc_tail(drive, disk, &pc)) {
 569                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 570                                 " parameters\n");
 571                 return 1;
 572         }
 573
 574         if (pc.buf[3] & 0x80)
 575                 drive->atapi_flags |= IDE_AFLAG_WP;
 576         else
 577                 drive->atapi_flags &= ~IDE_AFLAG_WP;
 578
 579         set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
 580
 581         page = &pc.buf[8];
 582
 583         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 584         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 585         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 586         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 587         heads         = pc.buf[8 + 4];
 588         sectors       = pc.buf[8 + 5];
 589
 590         capacity = cyls * heads * sectors * sector_size;
 591
 592         if (memcmp(page, &floppy->flexible_disk_page, 32))
 593                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 594                                 "%d sector size, %d rpm\n",
 595                                 drive->name, capacity / 1024, cyls, heads,
 596                                 sectors, transfer_rate / 8, sector_size, rpm);
 597
 598         memcpy(&floppy->flexible_disk_page, page, 32);
 599         drive->bios_cyl = cyls;
 600         drive->bios_head = heads;
 601         drive->bios_sect = sectors;
 602         lba_capacity = floppy->blocks * floppy->block_size;
 603
 604         if (capacity < lba_capacity) {
 605                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 606                         "bytes, but the drive only handles %d\n",
 607                         drive->name, lba_capacity, capacity);
 608                 floppy->blocks = floppy->block_size ?
 609                         capacity / floppy->block_size : 0;
 610         }
 611         return 0;
 612 }
 613
 614 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 615 {
 616         idefloppy_floppy_t *floppy = drive->driver_data;
 617         struct ide_atapi_pc pc;
 618
 619         drive->atapi_flags &= ~IDE_AFLAG_SRFP;
 620
 621         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE);
 622         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 623
 624         if (ide_queue_pc_tail(drive, floppy->disk, &pc))
 625                 return 1;
 626
 627         if (pc.buf[8 + 2] & 0x40)
 628                 drive->atapi_flags |= IDE_AFLAG_SRFP;
 629
 630         return 0;
 631 }
 632
 633 /*
 634  * Determine if a media is present in the floppy drive, and if so, its LBA
 635  * capacity.
 636  */
 637 static int ide_floppy_get_capacity(ide_drive_t *drive)
 638 {
 639         idefloppy_floppy_t *floppy = drive->driver_data;
 640         struct gendisk *disk = floppy->disk;
 641         struct ide_atapi_pc pc;
 642         u8 *cap_desc;
 643         u8 header_len, desc_cnt;
 644         int i, rc = 1, blocks, length;
 645
 646         drive->bios_cyl = 0;
 647         drive->bios_head = drive->bios_sect = 0;
 648         floppy->blocks = 0;
 649         floppy->bs_factor = 1;
 650         set_capacity(floppy->disk, 0);
 651
 652         idefloppy_create_read_capacity_cmd(&pc);
 653         if (ide_queue_pc_tail(drive, disk, &pc)) {
 654                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 655                 return 1;
 656         }
 657         header_len = pc.buf[3];
 658         cap_desc = &pc.buf[4];
 659         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 660
 661         for (i = 0; i < desc_cnt; i++) {
 662                 unsigned int desc_start = 4 + i*8;
 663
 664                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 665                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 666
 667                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 668                                 i, blocks * length / 1024, blocks, length);
 669
 670                 if (i)
 671                         continue;
 672                 /*
 673                  * the code below is valid only for the 1st descriptor, ie i=0
 674                  */
 675
 676                 switch (pc.buf[desc_start + 4] & 0x03) {
 677                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 678                 case CAPACITY_UNFORMATTED:
 679                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 680                                 /*
 681                                  * If it is not a clik drive, break out
 682                                  * (maintains previous driver behaviour)
 683                                  */
 684                                 break;
 685                 case CAPACITY_CURRENT:
 686                         /* Normal Zip/LS-120 disks */
 687                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 688                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 689                                         "sector size\n", drive->name,
 690                                         blocks * length / 1024, blocks, length);
 691                         memcpy(&floppy->cap_desc, cap_desc, 8);
 692
 693                         if (!length || length % 512) {
 694                                 printk(KERN_NOTICE "%s: %d bytes block size "
 695                                         "not supported\n", drive->name, length);
 696                         } else {
 697                                 floppy->blocks = blocks;
 698                                 floppy->block_size = length;
 699                                 floppy->bs_factor = length / 512;
 700                                 if (floppy->bs_factor != 1)
 701                                         printk(KERN_NOTICE "%s: warning: non "
 702                                                 "512 bytes block size not "
 703                                                 "fully supported\n",
 704                                                 drive->name);
 705                                 rc = 0;
 706                         }
 707                         break;
 708                 case CAPACITY_NO_CARTRIDGE:
 709                         /*
 710                          * This is a KERN_ERR so it appears on screen
 711                          * for the user to see
 712                          */
 713                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 714                         break;
 715                 case CAPACITY_INVALID:
 716                         printk(KERN_ERR "%s: Invalid capacity for disk "
 717                                 "in drive\n", drive->name);
 718                         break;
 719                 }
 720                 debug_log("Descriptor 0 Code: %d\n",
 721                           pc.buf[desc_start + 4] & 0x03);
 722         }
 723
 724         /* Clik! disk does not support get_flexible_disk_page */
 725         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 726                 (void) ide_floppy_get_flexible_disk_page(drive);
 727
 728         set_capacity(disk, floppy->blocks * floppy->bs_factor);
 729
 730         return rc;
 731 }
 732
 733 /*
 734  * Obtain the list of formattable capacities.
 735  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 736  * descriptors to userland, instead of our own structures.
 737  *
 738  * Userland gives us the following structure:
 739  *
 740  * struct idefloppy_format_capacities {
 741  *      int nformats;
 742  *      struct {
 743  *              int nblocks;
 744  *              int blocksize;
 745  *      } formats[];
 746  * };
 747  *
 748  * userland initializes nformats to the number of allocated formats[] records.
 749  * On exit we set nformats to the number of records we've actually initialized.
 750  */
 751
 752 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 753 {
 754         struct ide_floppy_obj *floppy = drive->driver_data;
 755         struct ide_atapi_pc pc;
 756         u8 header_len, desc_cnt;
 757         int i, blocks, length, u_array_size, u_index;
 758         int __user *argp;
 759
 760         if (get_user(u_array_size, arg))
 761                 return -EFAULT;
 762
 763         if (u_array_size <= 0)
 764                 return -EINVAL;
 765
 766         idefloppy_create_read_capacity_cmd(&pc);
 767         if (ide_queue_pc_tail(drive, floppy->disk, &pc)) {
 768                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 769                 return -EIO;
 770         }
 771
 772         header_len = pc.buf[3];
 773         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 774
 775         u_index = 0;
 776         argp = arg + 1;
 777
 778         /*
 779          * We always skip the first capacity descriptor.  That's the current
 780          * capacity.  We are interested in the remaining descriptors, the
 781          * formattable capacities.
 782          */
 783         for (i = 1; i < desc_cnt; i++) {
 784                 unsigned int desc_start = 4 + i*8;
 785
 786                 if (u_index >= u_array_size)
 787                         break;  /* User-supplied buffer too small */
 788
 789                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 790                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 791
 792                 if (put_user(blocks, argp))
 793                         return -EFAULT;
 794
 795                 ++argp;
 796
 797                 if (put_user(length, argp))
 798                         return -EFAULT;
 799
 800                 ++argp;
 801
 802                 ++u_index;
 803         }
 804
 805         if (put_user(u_index, arg))
 806                 return -EFAULT;
 807
 808         return 0;
 809 }
 810
 811 /*
 812  * Get ATAPI_FORMAT_UNIT progress indication.
 813  *
 814  * Userland gives a pointer to an int.  The int is set to a progress
 815  * indicator 0-65536, with 65536=100%.
 816  *
 817  * If the drive does not support format progress indication, we just check
 818  * the dsc bit, and return either 0 or 65536.
 819  */
 820
 821 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 822 {
 823         idefloppy_floppy_t *floppy = drive->driver_data;
 824         struct ide_atapi_pc pc;
 825         int progress_indication = 0x10000;
 826
 827         if (drive->atapi_flags & IDE_AFLAG_SRFP) {
 828                 idefloppy_create_request_sense_cmd(&pc);
 829                 if (ide_queue_pc_tail(drive, floppy->disk, &pc))
 830                         return -EIO;
 831
 832                 if (floppy->sense_key == 2 &&
 833                     floppy->asc == 4 &&
 834                     floppy->ascq == 4)
 835                         progress_indication = floppy->progress_indication;
 836
 837                 /* Else assume format_unit has finished, and we're at 0x10000 */
 838         } else {
 839                 ide_hwif_t *hwif = drive->hwif;
 840                 unsigned long flags;
 841                 u8 stat;
 842
 843                 local_irq_save(flags);
 844                 stat = hwif->tp_ops->read_status(hwif);
 845                 local_irq_restore(flags);
 846
 847                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 848         }
 849
 850         if (put_user(progress_indication, arg))
 851                 return -EFAULT;
 852
 853         return 0;
 854 }
 855
 856 static sector_t idefloppy_capacity(ide_drive_t *drive)
 857 {
 858         idefloppy_floppy_t *floppy = drive->driver_data;
 859         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 860
 861         return capacity;
 862 }
 863
 864 #ifdef CONFIG_IDE_PROC_FS
 865 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 866 ide_devset_rw(bios_head, 0,  255, bios_head);
 867 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 868
 869 static int get_ticks(ide_drive_t *drive)
 870 {
 871         idefloppy_floppy_t *floppy = drive->driver_data;
 872         return floppy->ticks;
 873 }
 874
 875 static int set_ticks(ide_drive_t *drive, int arg)
 876 {
 877         idefloppy_floppy_t *floppy = drive->driver_data;
 878         floppy->ticks = arg;
 879         return 0;
 880 }
 881
 882 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
 883
 884 static const struct ide_devset *idefloppy_settings[] = {
 885         &ide_devset_bios_cyl,
 886         &ide_devset_bios_head,
 887         &ide_devset_bios_sect,
 888         &ide_devset_ticks,
 889         NULL
 890 };
 891 #endif
 892
 893 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 894 {
 895         u16 *id = drive->id;
 896         u8 gcw[2];
 897
 898         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 899
 900         drive->pc_callback = ide_floppy_callback;
 901
 902         if (((gcw[0] & 0x60) >> 5) == 1)
 903                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
 904         /*
 905          * We used to check revisions here. At this point however I'm giving up.
 906          * Just assume they are all broken, its easier.
 907          *
 908          * The actual reason for the workarounds was likely a driver bug after
 909          * all rather than a firmware bug, and the workaround below used to hide
 910          * it. It should be fixed as of version 1.9, but to be on the safe side
 911          * we'll leave the limitation below for the 2.2.x tree.
 912          */
 913         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
 914                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
 915                 /* This value will be visible in the /proc/ide/hdx/settings */
 916                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
 917                 blk_queue_max_sectors(drive->queue, 64);
 918         }
 919
 920         /*
 921          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
 922          * nasty clicking noises without it, so please don't remove this.
 923          */
 924         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
 925                 blk_queue_max_sectors(drive->queue, 64);
 926                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
 927         }
 928
 929         (void) ide_floppy_get_capacity(drive);
 930
 931         ide_proc_register_driver(drive, floppy->driver);
 932 }
 933
 934 static void ide_floppy_remove(ide_drive_t *drive)
 935 {
 936         idefloppy_floppy_t *floppy = drive->driver_data;
 937         struct gendisk *g = floppy->disk;
 938
 939         ide_proc_unregister_driver(drive, floppy->driver);
 940
 941         del_gendisk(g);
 942
 943         ide_floppy_put(floppy);
 944 }
 945
 946 static void idefloppy_cleanup_obj(struct kref *kref)
 947 {
 948         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
 949         ide_drive_t *drive = floppy->drive;
 950         struct gendisk *g = floppy->disk;
 951
 952         drive->driver_data = NULL;
 953         g->private_data = NULL;
 954         put_disk(g);
 955         kfree(floppy);
 956 }
 957
 958 #ifdef CONFIG_IDE_PROC_FS
 959 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
 960                 int count, int *eof, void *data)
 961 {
 962         ide_drive_t*drive = (ide_drive_t *)data;
 963         int len;
 964
 965         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
 966         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 967 }
 968
 969 static ide_proc_entry_t idefloppy_proc[] = {
 970         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
 971         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
 972         { NULL, 0, NULL, NULL }
 973 };
 974 #endif  /* CONFIG_IDE_PROC_FS */
 975
 976 static int ide_floppy_probe(ide_drive_t *);
 977
 978 static ide_driver_t idefloppy_driver = {
 979         .gen_driver = {
 980                 .owner          = THIS_MODULE,
 981                 .name           = "ide-floppy",
 982                 .bus            = &ide_bus_type,
 983         },
 984         .probe                  = ide_floppy_probe,
 985         .remove                 = ide_floppy_remove,
 986         .version                = IDEFLOPPY_VERSION,
 987         .media                  = ide_floppy,
 988         .do_request             = idefloppy_do_request,
 989         .end_request            = idefloppy_end_request,
 990         .error                  = __ide_error,
 991 #ifdef CONFIG_IDE_PROC_FS
 992         .proc                   = idefloppy_proc,
 993         .settings               = idefloppy_settings,
 994 #endif
 995 };
 996
 997 static void ide_floppy_set_media_lock(ide_drive_t *drive, int on)
 998 {
 999         struct ide_floppy_obj *floppy = drive->driver_data;
1000         struct ide_atapi_pc pc;
1001
1002         /* IOMEGA Clik! drives do not support lock/unlock commands */
1003         if ((drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE) == 0) {
1004                 idefloppy_create_prevent_cmd(&pc, on);
1005                 (void)ide_queue_pc_tail(drive, floppy->disk, &pc);
1006         }
1007 }
1008
1009 static int idefloppy_open(struct inode *inode, struct file *filp)
1010 {
1011         struct gendisk *disk = inode->i_bdev->bd_disk;
1012         struct ide_floppy_obj *floppy;
1013         ide_drive_t *drive;
1014         struct ide_atapi_pc pc;
1015         int ret = 0;
1016
1017         debug_log("Reached %s\n", __func__);
1018
1019         floppy = ide_floppy_get(disk);
1020         if (!floppy)
1021                 return -ENXIO;
1022
1023         drive = floppy->drive;
1024
1025         floppy->openers++;
1026
1027         if (floppy->openers == 1) {
1028                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1029                 /* Just in case */
1030
1031                 ide_init_pc(&pc);
1032                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1033
1034                 if (ide_queue_pc_tail(drive, disk, &pc)) {
1035                         idefloppy_create_start_stop_cmd(&pc, 1);
1036                         (void)ide_queue_pc_tail(drive, disk, &pc);
1037                 }
1038
1039                 if (ide_floppy_get_capacity(drive)
1040                    && (filp->f_flags & O_NDELAY) == 0
1041                     /*
1042                      * Allow O_NDELAY to open a drive without a disk, or with an
1043                      * unreadable disk, so that we can get the format capacity
1044                      * of the drive or begin the format - Sam
1045                      */
1046                     ) {
1047                         ret = -EIO;
1048                         goto out_put_floppy;
1049                 }
1050
1051                 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
1052                         ret = -EROFS;
1053                         goto out_put_floppy;
1054                 }
1055
1056                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1057                 ide_floppy_set_media_lock(drive, 1);
1058                 check_disk_change(inode->i_bdev);
1059         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1060                 ret = -EBUSY;
1061                 goto out_put_floppy;
1062         }
1063         return 0;
1064
1065 out_put_floppy:
1066         floppy->openers--;
1067         ide_floppy_put(floppy);
1068         return ret;
1069 }
1070
1071 static int idefloppy_release(struct inode *inode, struct file *filp)
1072 {
1073         struct gendisk *disk = inode->i_bdev->bd_disk;
1074         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1075         ide_drive_t *drive = floppy->drive;
1076
1077         debug_log("Reached %s\n", __func__);
1078
1079         if (floppy->openers == 1) {
1080                 ide_floppy_set_media_lock(drive, 0);
1081                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1082         }
1083
1084         floppy->openers--;
1085
1086         ide_floppy_put(floppy);
1087
1088         return 0;
1089 }
1090
1091 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1092 {
1093         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1094         ide_drive_t *drive = floppy->drive;
1095
1096         geo->heads = drive->bios_head;
1097         geo->sectors = drive->bios_sect;
1098         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1099         return 0;
1100 }
1101
1102 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1103                                unsigned long arg, unsigned int cmd)
1104 {
1105         idefloppy_floppy_t *floppy = drive->driver_data;
1106         int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
1107
1108         if (floppy->openers > 1)
1109                 return -EBUSY;
1110
1111         ide_floppy_set_media_lock(drive, prevent);
1112
1113         if (cmd == CDROMEJECT) {
1114                 idefloppy_create_start_stop_cmd(pc, 2);
1115                 (void)ide_queue_pc_tail(drive, floppy->disk, pc);
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1122 {
1123         idefloppy_floppy_t *floppy = drive->driver_data;
1124         struct ide_atapi_pc pc;
1125         int blocks, length, flags, err = 0;
1126
1127         if (floppy->openers > 1) {
1128                 /* Don't format if someone is using the disk */
1129                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1130                 return -EBUSY;
1131         }
1132
1133         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1134
1135         /*
1136          * Send ATAPI_FORMAT_UNIT to the drive.
1137          *
1138          * Userland gives us the following structure:
1139          *
1140          * struct idefloppy_format_command {
1141          *        int nblocks;
1142          *        int blocksize;
1143          *        int flags;
1144          *        } ;
1145          *
1146          * flags is a bitmask, currently, the only defined flag is:
1147          *
1148          *        0x01 - verify media after format.
1149          */
1150         if (get_user(blocks, arg) ||
1151                         get_user(length, arg+1) ||
1152                         get_user(flags, arg+2)) {
1153                 err = -EFAULT;
1154                 goto out;
1155         }
1156
1157         (void) idefloppy_get_sfrp_bit(drive);
1158         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1159
1160         if (ide_queue_pc_tail(drive, floppy->disk, &pc))
1161                 err = -EIO;
1162
1163 out:
1164         if (err)
1165                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1166         return err;
1167 }
1168
1169 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1170                                    unsigned int cmd, void __user *argp)
1171 {
1172         switch (cmd) {
1173         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1174                 return 0;
1175         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1176                 return ide_floppy_get_format_capacities(drive, argp);
1177         case IDEFLOPPY_IOCTL_FORMAT_START:
1178                 if (!(file->f_mode & 2))
1179                         return -EPERM;
1180                 return ide_floppy_format_unit(drive, (int __user *)argp);
1181         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1182                 return ide_floppy_get_format_progress(drive, argp);
1183         default:
1184                 return -ENOTTY;
1185         }
1186 }
1187
1188 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1189                         unsigned int cmd, unsigned long arg)
1190 {
1191         struct block_device *bdev = inode->i_bdev;
1192         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1193         ide_drive_t *drive = floppy->drive;
1194         struct ide_atapi_pc pc;
1195         void __user *argp = (void __user *)arg;
1196         int err;
1197
1198         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1199                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1200
1201         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1202         if (err != -ENOTTY)
1203                 return err;
1204
1205         /*
1206          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1207          * and CDROM_SEND_PACKET (legacy) ioctls
1208          */
1209         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1210                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1211                                         bdev->bd_disk, cmd, argp);
1212
1213         if (err == -ENOTTY)
1214                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1215
1216         return err;
1217 }
1218
1219 static int idefloppy_media_changed(struct gendisk *disk)
1220 {
1221         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1222         ide_drive_t *drive = floppy->drive;
1223         int ret;
1224
1225         /* do not scan partitions twice if this is a removable device */
1226         if (drive->attach) {
1227                 drive->attach = 0;
1228                 return 0;
1229         }
1230         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1231         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1232         return ret;
1233 }
1234
1235 static int idefloppy_revalidate_disk(struct gendisk *disk)
1236 {
1237         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1238         set_capacity(disk, idefloppy_capacity(floppy->drive));
1239         return 0;
1240 }
1241
1242 static struct block_device_operations idefloppy_ops = {
1243         .owner                  = THIS_MODULE,
1244         .open                   = idefloppy_open,
1245         .release                = idefloppy_release,
1246         .ioctl                  = idefloppy_ioctl,
1247         .getgeo                 = idefloppy_getgeo,
1248         .media_changed          = idefloppy_media_changed,
1249         .revalidate_disk        = idefloppy_revalidate_disk
1250 };
1251
1252 static int ide_floppy_probe(ide_drive_t *drive)
1253 {
1254         idefloppy_floppy_t *floppy;
1255         struct gendisk *g;
1256
1257         if (!strstr("ide-floppy", drive->driver_req))
1258                 goto failed;
1259
1260         if (drive->media != ide_floppy)
1261                 goto failed;
1262
1263         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1264                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1265                                 " of ide-floppy\n", drive->name);
1266                 goto failed;
1267         }
1268         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1269         if (!floppy) {
1270                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1271                                 " structure\n", drive->name);
1272                 goto failed;
1273         }
1274
1275         g = alloc_disk(1 << PARTN_BITS);
1276         if (!g)
1277                 goto out_free_floppy;
1278
1279         ide_init_disk(g, drive);
1280
1281         kref_init(&floppy->kref);
1282
1283         floppy->drive = drive;
1284         floppy->driver = &idefloppy_driver;
1285         floppy->disk = g;
1286
1287         g->private_data = &floppy->driver;
1288
1289         drive->driver_data = floppy;
1290
1291         idefloppy_setup(drive, floppy);
1292
1293         g->minors = 1 << PARTN_BITS;
1294         g->driverfs_dev = &drive->gendev;
1295         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1296         g->fops = &idefloppy_ops;
1297         drive->attach = 1;
1298         add_disk(g);
1299         return 0;
1300
1301 out_free_floppy:
1302         kfree(floppy);
1303 failed:
1304         return -ENODEV;
1305 }
1306
1307 static void __exit idefloppy_exit(void)
1308 {
1309         driver_unregister(&idefloppy_driver.gen_driver);
1310 }
1311
1312 static int __init idefloppy_init(void)
1313 {
1314         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1315         return driver_register(&idefloppy_driver.gen_driver);
1316 }
1317
1318 MODULE_ALIAS("ide:*m-floppy*");
1319 module_init(idefloppy_init);
1320 module_exit(idefloppy_exit);
1321 MODULE_LICENSE("GPL");
1322 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1323