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         /* Write protect */
 114         int wp;
 115         /* Supports format progress report */
 116         int srfp;
 117 } idefloppy_floppy_t;
 118
 119 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 120
 121 /* IOCTLs used in low-level formatting. */
 122 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 123 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 124 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 125 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 126
 127 /* Error code returned in rq->errors to the higher part of the driver. */
 128 #define IDEFLOPPY_ERROR_GENERAL         101
 129
 130 /*
 131  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 132  * See SFF-8070i spec.
 133  */
 134 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 135 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 136
 137 static DEFINE_MUTEX(idefloppy_ref_mutex);
 138
 139 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 140
 141 #define ide_floppy_g(disk) \
 142         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 143
 144 static void idefloppy_cleanup_obj(struct kref *);
 145
 146 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 147 {
 148         struct ide_floppy_obj *floppy = NULL;
 149
 150         mutex_lock(&idefloppy_ref_mutex);
 151         floppy = ide_floppy_g(disk);
 152         if (floppy) {
 153                 if (ide_device_get(floppy->drive))
 154                         floppy = NULL;
 155                 else
 156                         kref_get(&floppy->kref);
 157         }
 158         mutex_unlock(&idefloppy_ref_mutex);
 159         return floppy;
 160 }
 161
 162 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 163 {
 164         ide_drive_t *drive = floppy->drive;
 165
 166         mutex_lock(&idefloppy_ref_mutex);
 167         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 168         ide_device_put(drive);
 169         mutex_unlock(&idefloppy_ref_mutex);
 170 }
 171
 172 /*
 173  * Used to finish servicing a request. For read/write requests, we will call
 174  * ide_end_request to pass to the next buffer.
 175  */
 176 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 177 {
 178         idefloppy_floppy_t *floppy = drive->driver_data;
 179         struct request *rq = HWGROUP(drive)->rq;
 180         int error;
 181
 182         debug_log("Reached %s\n", __func__);
 183
 184         switch (uptodate) {
 185         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 186         case 1: error = 0; break;
 187         default: error = uptodate;
 188         }
 189         if (error)
 190                 floppy->failed_pc = NULL;
 191         /* Why does this happen? */
 192         if (!rq)
 193                 return 0;
 194         if (!blk_special_request(rq)) {
 195                 /* our real local end request function */
 196                 ide_end_request(drive, uptodate, nsecs);
 197                 return 0;
 198         }
 199         rq->errors = error;
 200         /* fixme: need to move this local also */
 201         ide_end_drive_cmd(drive, 0, 0);
 202         return 0;
 203 }
 204
 205 static void idefloppy_update_buffers(ide_drive_t *drive,
 206                                 struct ide_atapi_pc *pc)
 207 {
 208         struct request *rq = pc->rq;
 209         struct bio *bio = rq->bio;
 210
 211         while ((bio = rq->bio) != NULL)
 212                 idefloppy_end_request(drive, 1, 0);
 213 }
 214
 215 static void ide_floppy_callback(ide_drive_t *drive)
 216 {
 217         idefloppy_floppy_t *floppy = drive->driver_data;
 218         struct ide_atapi_pc *pc = floppy->pc;
 219         int uptodate = pc->error ? 0 : 1;
 220
 221         debug_log("Reached %s\n", __func__);
 222
 223         if (floppy->failed_pc == pc)
 224                 floppy->failed_pc = NULL;
 225
 226         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 227             (pc->rq && blk_pc_request(pc->rq)))
 228                 uptodate = 1; /* FIXME */
 229         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 230                 u8 *buf = floppy->pc->buf;
 231
 232                 if (!pc->error) {
 233                         floppy->sense_key = buf[2] & 0x0F;
 234                         floppy->asc = buf[12];
 235                         floppy->ascq = buf[13];
 236                         floppy->progress_indication = buf[15] & 0x80 ?
 237                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 238
 239                         if (floppy->failed_pc)
 240                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 241
 242                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 243                                   floppy->sense_key, floppy->asc, floppy->ascq);
 244                 } else
 245                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 246                                         "Aborting request!\n");
 247         }
 248
 249         idefloppy_end_request(drive, uptodate, 0);
 250 }
 251
 252 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 253 {
 254         ide_init_pc(pc);
 255         pc->c[0] = GPCMD_REQUEST_SENSE;
 256         pc->c[4] = 255;
 257         pc->req_xfer = 18;
 258 }
 259
 260 /*
 261  * Called when an error was detected during the last packet command. We queue a
 262  * request sense packet command in the head of the request list.
 263  */
 264 static void idefloppy_retry_pc(ide_drive_t *drive)
 265 {
 266         struct ide_floppy_obj *floppy = drive->driver_data;
 267         struct request *rq = &floppy->request_sense_rq;
 268         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
 269
 270         (void)ide_read_error(drive);
 271         idefloppy_create_request_sense_cmd(pc);
 272         ide_queue_pc_head(drive, floppy->disk, pc, rq);
 273 }
 274
 275 /* The usual interrupt handler called during a packet command. */
 276 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 277 {
 278         idefloppy_floppy_t *floppy = drive->driver_data;
 279
 280         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 281                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 282                            idefloppy_retry_pc, NULL, ide_io_buffers);
 283 }
 284
 285 /*
 286  * What we have here is a classic case of a top half / bottom half interrupt
 287  * service routine. In interrupt mode, the device sends an interrupt to signal
 288  * that it is ready to receive a packet. However, we need to delay about 2-3
 289  * ticks before issuing the packet or we gets in trouble.
 290  */
 291 static int idefloppy_transfer_pc(ide_drive_t *drive)
 292 {
 293         idefloppy_floppy_t *floppy = drive->driver_data;
 294
 295         /* Send the actual packet */
 296         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 297
 298         /* Timeout for the packet command */
 299         return IDEFLOPPY_WAIT_CMD;
 300 }
 301
 302
 303 /*
 304  * Called as an interrupt (or directly). When the device says it's ready for a
 305  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 306  * transfer_pc.
 307  */
 308 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 309 {
 310         idefloppy_floppy_t *floppy = drive->driver_data;
 311         struct ide_atapi_pc *pc = floppy->pc;
 312         ide_expiry_t *expiry;
 313         unsigned int timeout;
 314
 315         /*
 316          * The following delay solves a problem with ATAPI Zip 100 drives
 317          * where the Busy flag was apparently being deasserted before the
 318          * unit was ready to receive data. This was happening on a
 319          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 320          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 321          * used until after the packet is moved in about 50 msec.
 322          */
 323         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 324                 timeout = floppy->ticks;
 325                 expiry = &idefloppy_transfer_pc;
 326         } else {
 327                 timeout = IDEFLOPPY_WAIT_CMD;
 328                 expiry = NULL;
 329         }
 330
 331         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 332 }
 333
 334 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 335                                     struct ide_atapi_pc *pc)
 336 {
 337         /* supress error messages resulting from Medium not present */
 338         if (floppy->sense_key == 0x02 &&
 339             floppy->asc       == 0x3a &&
 340             floppy->ascq      == 0x00)
 341                 return;
 342
 343         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 344                         "asc = %2x, ascq = %2x\n",
 345                         floppy->drive->name, pc->c[0], floppy->sense_key,
 346                         floppy->asc, floppy->ascq);
 347
 348 }
 349
 350 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 351                 struct ide_atapi_pc *pc)
 352 {
 353         idefloppy_floppy_t *floppy = drive->driver_data;
 354
 355         if (floppy->failed_pc == NULL &&
 356             pc->c[0] != GPCMD_REQUEST_SENSE)
 357                 floppy->failed_pc = pc;
 358         /* Set the current packet command */
 359         floppy->pc = pc;
 360
 361         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 362                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 363                         ide_floppy_report_error(floppy, pc);
 364                 /* Giving up */
 365                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 366
 367                 floppy->failed_pc = NULL;
 368                 drive->pc_callback(drive);
 369                 return ide_stopped;
 370         }
 371
 372         debug_log("Retry number - %d\n", pc->retries);
 373
 374         pc->retries++;
 375
 376         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 377                             IDEFLOPPY_WAIT_CMD, NULL);
 378 }
 379
 380 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 381 {
 382         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 383
 384         ide_init_pc(pc);
 385         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 386         pc->c[4] = prevent;
 387 }
 388
 389 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 390 {
 391         ide_init_pc(pc);
 392         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 393         pc->c[7] = 255;
 394         pc->c[8] = 255;
 395         pc->req_xfer = 255;
 396 }
 397
 398 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 399                 int l, int flags)
 400 {
 401         ide_init_pc(pc);
 402         pc->c[0] = GPCMD_FORMAT_UNIT;
 403         pc->c[1] = 0x17;
 404
 405         memset(pc->buf, 0, 12);
 406         pc->buf[1] = 0xA2;
 407         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 408
 409         if (flags & 1)                          /* Verify bit on... */
 410                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 411         pc->buf[3] = 8;
 412
 413         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 414         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 415         pc->buf_size = 12;
 416         pc->flags |= PC_FLAG_WRITING;
 417 }
 418
 419 /* A mode sense command is used to "sense" floppy parameters. */
 420 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 421                                             u8 page_code)
 422 {
 423         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 424
 425         ide_init_pc(pc);
 426         pc->c[0] = GPCMD_MODE_SENSE_10;
 427         pc->c[1] = 0;
 428         pc->c[2] = page_code;
 429
 430         switch (page_code) {
 431         case IDEFLOPPY_CAPABILITIES_PAGE:
 432                 length += 12;
 433                 break;
 434         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 435                 length += 32;
 436                 break;
 437         default:
 438                 printk(KERN_ERR "ide-floppy: unsupported page code "
 439                                 "in create_mode_sense_cmd\n");
 440         }
 441         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 442         pc->req_xfer = length;
 443 }
 444
 445 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 446 {
 447         ide_init_pc(pc);
 448         pc->c[0] = GPCMD_START_STOP_UNIT;
 449         pc->c[4] = start;
 450 }
 451
 452 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 453                                     struct ide_atapi_pc *pc, struct request *rq,
 454                                     unsigned long sector)
 455 {
 456         int block = sector / floppy->bs_factor;
 457         int blocks = rq->nr_sectors / floppy->bs_factor;
 458         int cmd = rq_data_dir(rq);
 459
 460         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 461                 block, blocks);
 462
 463         ide_init_pc(pc);
 464         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 465         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 466         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 467
 468         memcpy(rq->cmd, pc->c, 12);
 469
 470         pc->rq = rq;
 471         pc->b_count = 0;
 472         if (rq->cmd_flags & REQ_RW)
 473                 pc->flags |= PC_FLAG_WRITING;
 474         pc->buf = NULL;
 475         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 476         pc->flags |= PC_FLAG_DMA_OK;
 477 }
 478
 479 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 480                 struct ide_atapi_pc *pc, struct request *rq)
 481 {
 482         ide_init_pc(pc);
 483         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 484         pc->rq = rq;
 485         pc->b_count = 0;
 486         if (rq->data_len && rq_data_dir(rq) == WRITE)
 487                 pc->flags |= PC_FLAG_WRITING;
 488         pc->buf = rq->data;
 489         if (rq->bio)
 490                 pc->flags |= PC_FLAG_DMA_OK;
 491         /*
 492          * possibly problematic, doesn't look like ide-floppy correctly
 493          * handled scattered requests if dma fails...
 494          */
 495         pc->req_xfer = pc->buf_size = rq->data_len;
 496 }
 497
 498 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 499                 struct request *rq, sector_t block_s)
 500 {
 501         idefloppy_floppy_t *floppy = drive->driver_data;
 502         ide_hwif_t *hwif = drive->hwif;
 503         struct ide_atapi_pc *pc;
 504         unsigned long block = (unsigned long)block_s;
 505
 506         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 507                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 508                   rq->cmd[0], rq->cmd_type, rq->errors);
 509
 510         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 511                   __func__, (long)rq->sector, rq->nr_sectors,
 512                   rq->current_nr_sectors);
 513
 514         if (rq->errors >= ERROR_MAX) {
 515                 if (floppy->failed_pc)
 516                         ide_floppy_report_error(floppy, floppy->failed_pc);
 517                 else
 518                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 519                                 drive->name);
 520                 idefloppy_end_request(drive, 0, 0);
 521                 return ide_stopped;
 522         }
 523         if (blk_fs_request(rq)) {
 524                 if (((long)rq->sector % floppy->bs_factor) ||
 525                     (rq->nr_sectors % floppy->bs_factor)) {
 526                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 527                                         drive->name);
 528                         idefloppy_end_request(drive, 0, 0);
 529                         return ide_stopped;
 530                 }
 531                 pc = &floppy->queued_pc;
 532                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 533         } else if (blk_special_request(rq)) {
 534                 pc = (struct ide_atapi_pc *) rq->buffer;
 535         } else if (blk_pc_request(rq)) {
 536                 pc = &floppy->queued_pc;
 537                 idefloppy_blockpc_cmd(floppy, pc, rq);
 538         } else {
 539                 blk_dump_rq_flags(rq,
 540                         "ide-floppy: unsupported command in queue");
 541                 idefloppy_end_request(drive, 0, 0);
 542                 return ide_stopped;
 543         }
 544
 545         ide_init_sg_cmd(drive, rq);
 546         ide_map_sg(drive, rq);
 547
 548         pc->sg = hwif->sg_table;
 549         pc->sg_cnt = hwif->sg_nents;
 550
 551         pc->rq = rq;
 552
 553         return idefloppy_issue_pc(drive, pc);
 554 }
 555
 556 /*
 557  * Add a special packet command request to the tail of the request queue,
 558  * and wait for it to be serviced.
 559  */
 560 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 561 {
 562         struct ide_floppy_obj *floppy = drive->driver_data;
 563         struct request *rq;
 564         int error;
 565
 566         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 567         rq->buffer = (char *) pc;
 568         rq->cmd_type = REQ_TYPE_SPECIAL;
 569         memcpy(rq->cmd, pc->c, 12);
 570         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 571         blk_put_request(rq);
 572
 573         return error;
 574 }
 575
 576 /*
 577  * Look at the flexible disk page parameters. We ignore the CHS capacity
 578  * parameters and use the LBA parameters instead.
 579  */
 580 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 581 {
 582         idefloppy_floppy_t *floppy = drive->driver_data;
 583         struct ide_atapi_pc pc;
 584         u8 *page;
 585         int capacity, lba_capacity;
 586         u16 transfer_rate, sector_size, cyls, rpm;
 587         u8 heads, sectors;
 588
 589         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 590
 591         if (idefloppy_queue_pc_tail(drive, &pc)) {
 592                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 593                                 " parameters\n");
 594                 return 1;
 595         }
 596         floppy->wp = !!(pc.buf[3] & 0x80);
 597         set_disk_ro(floppy->disk, floppy->wp);
 598         page = &pc.buf[8];
 599
 600         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 601         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 602         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 603         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 604         heads         = pc.buf[8 + 4];
 605         sectors       = pc.buf[8 + 5];
 606
 607         capacity = cyls * heads * sectors * sector_size;
 608
 609         if (memcmp(page, &floppy->flexible_disk_page, 32))
 610                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 611                                 "%d sector size, %d rpm\n",
 612                                 drive->name, capacity / 1024, cyls, heads,
 613                                 sectors, transfer_rate / 8, sector_size, rpm);
 614
 615         memcpy(&floppy->flexible_disk_page, page, 32);
 616         drive->bios_cyl = cyls;
 617         drive->bios_head = heads;
 618         drive->bios_sect = sectors;
 619         lba_capacity = floppy->blocks * floppy->block_size;
 620
 621         if (capacity < lba_capacity) {
 622                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 623                         "bytes, but the drive only handles %d\n",
 624                         drive->name, lba_capacity, capacity);
 625                 floppy->blocks = floppy->block_size ?
 626                         capacity / floppy->block_size : 0;
 627         }
 628         return 0;
 629 }
 630
 631 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 632 {
 633         idefloppy_floppy_t *floppy = drive->driver_data;
 634         struct ide_atapi_pc pc;
 635
 636         floppy->srfp = 0;
 637
 638         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE);
 639         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 640
 641         if (idefloppy_queue_pc_tail(drive, &pc))
 642                 return 1;
 643
 644         floppy->srfp = pc.buf[8 + 2] & 0x40;
 645         return 0;
 646 }
 647
 648 /*
 649  * Determine if a media is present in the floppy drive, and if so, its LBA
 650  * capacity.
 651  */
 652 static int ide_floppy_get_capacity(ide_drive_t *drive)
 653 {
 654         idefloppy_floppy_t *floppy = drive->driver_data;
 655         struct ide_atapi_pc pc;
 656         u8 *cap_desc;
 657         u8 header_len, desc_cnt;
 658         int i, rc = 1, blocks, length;
 659
 660         drive->bios_cyl = 0;
 661         drive->bios_head = drive->bios_sect = 0;
 662         floppy->blocks = 0;
 663         floppy->bs_factor = 1;
 664         set_capacity(floppy->disk, 0);
 665
 666         idefloppy_create_read_capacity_cmd(&pc);
 667         if (idefloppy_queue_pc_tail(drive, &pc)) {
 668                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 669                 return 1;
 670         }
 671         header_len = pc.buf[3];
 672         cap_desc = &pc.buf[4];
 673         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 674
 675         for (i = 0; i < desc_cnt; i++) {
 676                 unsigned int desc_start = 4 + i*8;
 677
 678                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 679                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 680
 681                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 682                                 i, blocks * length / 1024, blocks, length);
 683
 684                 if (i)
 685                         continue;
 686                 /*
 687                  * the code below is valid only for the 1st descriptor, ie i=0
 688                  */
 689
 690                 switch (pc.buf[desc_start + 4] & 0x03) {
 691                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 692                 case CAPACITY_UNFORMATTED:
 693                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 694                                 /*
 695                                  * If it is not a clik drive, break out
 696                                  * (maintains previous driver behaviour)
 697                                  */
 698                                 break;
 699                 case CAPACITY_CURRENT:
 700                         /* Normal Zip/LS-120 disks */
 701                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 702                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 703                                         "sector size\n", drive->name,
 704                                         blocks * length / 1024, blocks, length);
 705                         memcpy(&floppy->cap_desc, cap_desc, 8);
 706
 707                         if (!length || length % 512) {
 708                                 printk(KERN_NOTICE "%s: %d bytes block size "
 709                                         "not supported\n", drive->name, length);
 710                         } else {
 711                                 floppy->blocks = blocks;
 712                                 floppy->block_size = length;
 713                                 floppy->bs_factor = length / 512;
 714                                 if (floppy->bs_factor != 1)
 715                                         printk(KERN_NOTICE "%s: warning: non "
 716                                                 "512 bytes block size not "
 717                                                 "fully supported\n",
 718                                                 drive->name);
 719                                 rc = 0;
 720                         }
 721                         break;
 722                 case CAPACITY_NO_CARTRIDGE:
 723                         /*
 724                          * This is a KERN_ERR so it appears on screen
 725                          * for the user to see
 726                          */
 727                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 728                         break;
 729                 case CAPACITY_INVALID:
 730                         printk(KERN_ERR "%s: Invalid capacity for disk "
 731                                 "in drive\n", drive->name);
 732                         break;
 733                 }
 734                 debug_log("Descriptor 0 Code: %d\n",
 735                           pc.buf[desc_start + 4] & 0x03);
 736         }
 737
 738         /* Clik! disk does not support get_flexible_disk_page */
 739         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 740                 (void) ide_floppy_get_flexible_disk_page(drive);
 741
 742         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 743         return rc;
 744 }
 745
 746 /*
 747  * Obtain the list of formattable capacities.
 748  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 749  * descriptors to userland, instead of our own structures.
 750  *
 751  * Userland gives us the following structure:
 752  *
 753  * struct idefloppy_format_capacities {
 754  *      int nformats;
 755  *      struct {
 756  *              int nblocks;
 757  *              int blocksize;
 758  *      } formats[];
 759  * };
 760  *
 761  * userland initializes nformats to the number of allocated formats[] records.
 762  * On exit we set nformats to the number of records we've actually initialized.
 763  */
 764
 765 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 766 {
 767         struct ide_atapi_pc pc;
 768         u8 header_len, desc_cnt;
 769         int i, blocks, length, u_array_size, u_index;
 770         int __user *argp;
 771
 772         if (get_user(u_array_size, arg))
 773                 return -EFAULT;
 774
 775         if (u_array_size <= 0)
 776                 return -EINVAL;
 777
 778         idefloppy_create_read_capacity_cmd(&pc);
 779         if (idefloppy_queue_pc_tail(drive, &pc)) {
 780                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 781                 return -EIO;
 782         }
 783
 784         header_len = pc.buf[3];
 785         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 786
 787         u_index = 0;
 788         argp = arg + 1;
 789
 790         /*
 791          * We always skip the first capacity descriptor.  That's the current
 792          * capacity.  We are interested in the remaining descriptors, the
 793          * formattable capacities.
 794          */
 795         for (i = 1; i < desc_cnt; i++) {
 796                 unsigned int desc_start = 4 + i*8;
 797
 798                 if (u_index >= u_array_size)
 799                         break;  /* User-supplied buffer too small */
 800
 801                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 802                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 803
 804                 if (put_user(blocks, argp))
 805                         return -EFAULT;
 806
 807                 ++argp;
 808
 809                 if (put_user(length, argp))
 810                         return -EFAULT;
 811
 812                 ++argp;
 813
 814                 ++u_index;
 815         }
 816
 817         if (put_user(u_index, arg))
 818                 return -EFAULT;
 819
 820         return 0;
 821 }
 822
 823 /*
 824  * Get ATAPI_FORMAT_UNIT progress indication.
 825  *
 826  * Userland gives a pointer to an int.  The int is set to a progress
 827  * indicator 0-65536, with 65536=100%.
 828  *
 829  * If the drive does not support format progress indication, we just check
 830  * the dsc bit, and return either 0 or 65536.
 831  */
 832
 833 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 834 {
 835         idefloppy_floppy_t *floppy = drive->driver_data;
 836         struct ide_atapi_pc pc;
 837         int progress_indication = 0x10000;
 838
 839         if (floppy->srfp) {
 840                 idefloppy_create_request_sense_cmd(&pc);
 841                 if (idefloppy_queue_pc_tail(drive, &pc))
 842                         return -EIO;
 843
 844                 if (floppy->sense_key == 2 &&
 845                     floppy->asc == 4 &&
 846                     floppy->ascq == 4)
 847                         progress_indication = floppy->progress_indication;
 848
 849                 /* Else assume format_unit has finished, and we're at 0x10000 */
 850         } else {
 851                 ide_hwif_t *hwif = drive->hwif;
 852                 unsigned long flags;
 853                 u8 stat;
 854
 855                 local_irq_save(flags);
 856                 stat = hwif->tp_ops->read_status(hwif);
 857                 local_irq_restore(flags);
 858
 859                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 860         }
 861
 862         if (put_user(progress_indication, arg))
 863                 return -EFAULT;
 864
 865         return 0;
 866 }
 867
 868 static sector_t idefloppy_capacity(ide_drive_t *drive)
 869 {
 870         idefloppy_floppy_t *floppy = drive->driver_data;
 871         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 872
 873         return capacity;
 874 }
 875
 876 #ifdef CONFIG_IDE_PROC_FS
 877 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 878 ide_devset_rw(bios_head, 0,  255, bios_head);
 879 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 880
 881 static int get_ticks(ide_drive_t *drive)
 882 {
 883         idefloppy_floppy_t *floppy = drive->driver_data;
 884         return floppy->ticks;
 885 }
 886
 887 static int set_ticks(ide_drive_t *drive, int arg)
 888 {
 889         idefloppy_floppy_t *floppy = drive->driver_data;
 890         floppy->ticks = arg;
 891         return 0;
 892 }
 893
 894 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
 895
 896 static const struct ide_devset *idefloppy_settings[] = {
 897         &ide_devset_bios_cyl,
 898         &ide_devset_bios_head,
 899         &ide_devset_bios_sect,
 900         &ide_devset_ticks,
 901         NULL
 902 };
 903 #endif
 904
 905 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 906 {
 907         u16 *id = drive->id;
 908         u8 gcw[2];
 909
 910         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 911
 912         drive->pc_callback = ide_floppy_callback;
 913
 914         if (((gcw[0] & 0x60) >> 5) == 1)
 915                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
 916         /*
 917          * We used to check revisions here. At this point however I'm giving up.
 918          * Just assume they are all broken, its easier.
 919          *
 920          * The actual reason for the workarounds was likely a driver bug after
 921          * all rather than a firmware bug, and the workaround below used to hide
 922          * it. It should be fixed as of version 1.9, but to be on the safe side
 923          * we'll leave the limitation below for the 2.2.x tree.
 924          */
 925         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
 926                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
 927                 /* This value will be visible in the /proc/ide/hdx/settings */
 928                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
 929                 blk_queue_max_sectors(drive->queue, 64);
 930         }
 931
 932         /*
 933          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
 934          * nasty clicking noises without it, so please don't remove this.
 935          */
 936         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
 937                 blk_queue_max_sectors(drive->queue, 64);
 938                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
 939         }
 940
 941         (void) ide_floppy_get_capacity(drive);
 942
 943         ide_proc_register_driver(drive, floppy->driver);
 944 }
 945
 946 static void ide_floppy_remove(ide_drive_t *drive)
 947 {
 948         idefloppy_floppy_t *floppy = drive->driver_data;
 949         struct gendisk *g = floppy->disk;
 950
 951         ide_proc_unregister_driver(drive, floppy->driver);
 952
 953         del_gendisk(g);
 954
 955         ide_floppy_put(floppy);
 956 }
 957
 958 static void idefloppy_cleanup_obj(struct kref *kref)
 959 {
 960         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
 961         ide_drive_t *drive = floppy->drive;
 962         struct gendisk *g = floppy->disk;
 963
 964         drive->driver_data = NULL;
 965         g->private_data = NULL;
 966         put_disk(g);
 967         kfree(floppy);
 968 }
 969
 970 #ifdef CONFIG_IDE_PROC_FS
 971 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
 972                 int count, int *eof, void *data)
 973 {
 974         ide_drive_t*drive = (ide_drive_t *)data;
 975         int len;
 976
 977         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
 978         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 979 }
 980
 981 static ide_proc_entry_t idefloppy_proc[] = {
 982         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
 983         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
 984         { NULL, 0, NULL, NULL }
 985 };
 986 #endif  /* CONFIG_IDE_PROC_FS */
 987
 988 static int ide_floppy_probe(ide_drive_t *);
 989
 990 static ide_driver_t idefloppy_driver = {
 991         .gen_driver = {
 992                 .owner          = THIS_MODULE,
 993                 .name           = "ide-floppy",
 994                 .bus            = &ide_bus_type,
 995         },
 996         .probe                  = ide_floppy_probe,
 997         .remove                 = ide_floppy_remove,
 998         .version                = IDEFLOPPY_VERSION,
 999         .media                  = ide_floppy,
1000         .do_request             = idefloppy_do_request,
1001         .end_request            = idefloppy_end_request,
1002         .error                  = __ide_error,
1003 #ifdef CONFIG_IDE_PROC_FS
1004         .proc                   = idefloppy_proc,
1005         .settings               = idefloppy_settings,
1006 #endif
1007 };
1008
1009 static void ide_floppy_set_media_lock(ide_drive_t *drive, int on)
1010 {
1011         struct ide_atapi_pc pc;
1012
1013         /* IOMEGA Clik! drives do not support lock/unlock commands */
1014         if ((drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE) == 0) {
1015                 idefloppy_create_prevent_cmd(&pc, on);
1016                 (void)idefloppy_queue_pc_tail(drive, &pc);
1017         }
1018 }
1019
1020 static int idefloppy_open(struct inode *inode, struct file *filp)
1021 {
1022         struct gendisk *disk = inode->i_bdev->bd_disk;
1023         struct ide_floppy_obj *floppy;
1024         ide_drive_t *drive;
1025         struct ide_atapi_pc pc;
1026         int ret = 0;
1027
1028         debug_log("Reached %s\n", __func__);
1029
1030         floppy = ide_floppy_get(disk);
1031         if (!floppy)
1032                 return -ENXIO;
1033
1034         drive = floppy->drive;
1035
1036         floppy->openers++;
1037
1038         if (floppy->openers == 1) {
1039                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1040                 /* Just in case */
1041
1042                 ide_init_pc(&pc);
1043                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1044
1045                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1046                         idefloppy_create_start_stop_cmd(&pc, 1);
1047                         (void) idefloppy_queue_pc_tail(drive, &pc);
1048                 }
1049
1050                 if (ide_floppy_get_capacity(drive)
1051                    && (filp->f_flags & O_NDELAY) == 0
1052                     /*
1053                      * Allow O_NDELAY to open a drive without a disk, or with an
1054                      * unreadable disk, so that we can get the format capacity
1055                      * of the drive or begin the format - Sam
1056                      */
1057                     ) {
1058                         ret = -EIO;
1059                         goto out_put_floppy;
1060                 }
1061
1062                 if (floppy->wp && (filp->f_mode & 2)) {
1063                         ret = -EROFS;
1064                         goto out_put_floppy;
1065                 }
1066
1067                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1068                 ide_floppy_set_media_lock(drive, 1);
1069                 check_disk_change(inode->i_bdev);
1070         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1071                 ret = -EBUSY;
1072                 goto out_put_floppy;
1073         }
1074         return 0;
1075
1076 out_put_floppy:
1077         floppy->openers--;
1078         ide_floppy_put(floppy);
1079         return ret;
1080 }
1081
1082 static int idefloppy_release(struct inode *inode, struct file *filp)
1083 {
1084         struct gendisk *disk = inode->i_bdev->bd_disk;
1085         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1086         ide_drive_t *drive = floppy->drive;
1087
1088         debug_log("Reached %s\n", __func__);
1089
1090         if (floppy->openers == 1) {
1091                 ide_floppy_set_media_lock(drive, 0);
1092                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1093         }
1094
1095         floppy->openers--;
1096
1097         ide_floppy_put(floppy);
1098
1099         return 0;
1100 }
1101
1102 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1103 {
1104         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1105         ide_drive_t *drive = floppy->drive;
1106
1107         geo->heads = drive->bios_head;
1108         geo->sectors = drive->bios_sect;
1109         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1110         return 0;
1111 }
1112
1113 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1114                                unsigned long arg, unsigned int cmd)
1115 {
1116         idefloppy_floppy_t *floppy = drive->driver_data;
1117         int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
1118
1119         if (floppy->openers > 1)
1120                 return -EBUSY;
1121
1122         ide_floppy_set_media_lock(drive, prevent);
1123
1124         if (cmd == CDROMEJECT) {
1125                 idefloppy_create_start_stop_cmd(pc, 2);
1126                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1133 {
1134         idefloppy_floppy_t *floppy = drive->driver_data;
1135         struct ide_atapi_pc pc;
1136         int blocks, length, flags, err = 0;
1137
1138         if (floppy->openers > 1) {
1139                 /* Don't format if someone is using the disk */
1140                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1141                 return -EBUSY;
1142         }
1143
1144         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1145
1146         /*
1147          * Send ATAPI_FORMAT_UNIT to the drive.
1148          *
1149          * Userland gives us the following structure:
1150          *
1151          * struct idefloppy_format_command {
1152          *        int nblocks;
1153          *        int blocksize;
1154          *        int flags;
1155          *        } ;
1156          *
1157          * flags is a bitmask, currently, the only defined flag is:
1158          *
1159          *        0x01 - verify media after format.
1160          */
1161         if (get_user(blocks, arg) ||
1162                         get_user(length, arg+1) ||
1163                         get_user(flags, arg+2)) {
1164                 err = -EFAULT;
1165                 goto out;
1166         }
1167
1168         (void) idefloppy_get_sfrp_bit(drive);
1169         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1170
1171         if (idefloppy_queue_pc_tail(drive, &pc))
1172                 err = -EIO;
1173
1174 out:
1175         if (err)
1176                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1177         return err;
1178 }
1179
1180 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1181                                    unsigned int cmd, void __user *argp)
1182 {
1183         switch (cmd) {
1184         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1185                 return 0;
1186         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1187                 return ide_floppy_get_format_capacities(drive, argp);
1188         case IDEFLOPPY_IOCTL_FORMAT_START:
1189                 if (!(file->f_mode & 2))
1190                         return -EPERM;
1191                 return ide_floppy_format_unit(drive, (int __user *)argp);
1192         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1193                 return ide_floppy_get_format_progress(drive, argp);
1194         default:
1195                 return -ENOTTY;
1196         }
1197 }
1198
1199 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1200                         unsigned int cmd, unsigned long arg)
1201 {
1202         struct block_device *bdev = inode->i_bdev;
1203         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1204         ide_drive_t *drive = floppy->drive;
1205         struct ide_atapi_pc pc;
1206         void __user *argp = (void __user *)arg;
1207         int err;
1208
1209         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1210                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1211
1212         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1213         if (err != -ENOTTY)
1214                 return err;
1215
1216         /*
1217          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1218          * and CDROM_SEND_PACKET (legacy) ioctls
1219          */
1220         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1221                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1222                                         bdev->bd_disk, cmd, argp);
1223
1224         if (err == -ENOTTY)
1225                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1226
1227         return err;
1228 }
1229
1230 static int idefloppy_media_changed(struct gendisk *disk)
1231 {
1232         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1233         ide_drive_t *drive = floppy->drive;
1234         int ret;
1235
1236         /* do not scan partitions twice if this is a removable device */
1237         if (drive->attach) {
1238                 drive->attach = 0;
1239                 return 0;
1240         }
1241         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1242         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1243         return ret;
1244 }
1245
1246 static int idefloppy_revalidate_disk(struct gendisk *disk)
1247 {
1248         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1249         set_capacity(disk, idefloppy_capacity(floppy->drive));
1250         return 0;
1251 }
1252
1253 static struct block_device_operations idefloppy_ops = {
1254         .owner                  = THIS_MODULE,
1255         .open                   = idefloppy_open,
1256         .release                = idefloppy_release,
1257         .ioctl                  = idefloppy_ioctl,
1258         .getgeo                 = idefloppy_getgeo,
1259         .media_changed          = idefloppy_media_changed,
1260         .revalidate_disk        = idefloppy_revalidate_disk
1261 };
1262
1263 static int ide_floppy_probe(ide_drive_t *drive)
1264 {
1265         idefloppy_floppy_t *floppy;
1266         struct gendisk *g;
1267
1268         if (!strstr("ide-floppy", drive->driver_req))
1269                 goto failed;
1270
1271         if (drive->media != ide_floppy)
1272                 goto failed;
1273
1274         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1275                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1276                                 " of ide-floppy\n", drive->name);
1277                 goto failed;
1278         }
1279         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1280         if (!floppy) {
1281                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1282                                 " structure\n", drive->name);
1283                 goto failed;
1284         }
1285
1286         g = alloc_disk(1 << PARTN_BITS);
1287         if (!g)
1288                 goto out_free_floppy;
1289
1290         ide_init_disk(g, drive);
1291
1292         kref_init(&floppy->kref);
1293
1294         floppy->drive = drive;
1295         floppy->driver = &idefloppy_driver;
1296         floppy->disk = g;
1297
1298         g->private_data = &floppy->driver;
1299
1300         drive->driver_data = floppy;
1301
1302         idefloppy_setup(drive, floppy);
1303
1304         g->minors = 1 << PARTN_BITS;
1305         g->driverfs_dev = &drive->gendev;
1306         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1307         g->fops = &idefloppy_ops;
1308         drive->attach = 1;
1309         add_disk(g);
1310         return 0;
1311
1312 out_free_floppy:
1313         kfree(floppy);
1314 failed:
1315         return -ENODEV;
1316 }
1317
1318 static void __exit idefloppy_exit(void)
1319 {
1320         driver_unregister(&idefloppy_driver.gen_driver);
1321 }
1322
1323 static int __init idefloppy_init(void)
1324 {
1325         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1326         return driver_register(&idefloppy_driver.gen_driver);
1327 }
1328
1329 MODULE_ALIAS("ide:*m-floppy*");
1330 module_init(idefloppy_init);
1331 module_exit(idefloppy_exit);
1332 MODULE_LICENSE("GPL");
1333 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1334