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 /*
 216  * Generate a new packet command request in front of the request queue, before
 217  * the current request so that it will be processed immediately, on the next
 218  * pass through the driver.
 219  */
 220 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 221                 struct request *rq)
 222 {
 223         struct ide_floppy_obj *floppy = drive->driver_data;
 224
 225         blk_rq_init(NULL, rq);
 226         rq->buffer = (char *) pc;
 227         rq->cmd_type = REQ_TYPE_SPECIAL;
 228         rq->cmd_flags |= REQ_PREEMPT;
 229         rq->rq_disk = floppy->disk;
 230         memcpy(rq->cmd, pc->c, 12);
 231         ide_do_drive_cmd(drive, rq);
 232 }
 233
 234 static void ide_floppy_callback(ide_drive_t *drive)
 235 {
 236         idefloppy_floppy_t *floppy = drive->driver_data;
 237         struct ide_atapi_pc *pc = floppy->pc;
 238         int uptodate = pc->error ? 0 : 1;
 239
 240         debug_log("Reached %s\n", __func__);
 241
 242         if (floppy->failed_pc == pc)
 243                 floppy->failed_pc = NULL;
 244
 245         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 246             (pc->rq && blk_pc_request(pc->rq)))
 247                 uptodate = 1; /* FIXME */
 248         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 249                 u8 *buf = floppy->pc->buf;
 250
 251                 if (!pc->error) {
 252                         floppy->sense_key = buf[2] & 0x0F;
 253                         floppy->asc = buf[12];
 254                         floppy->ascq = buf[13];
 255                         floppy->progress_indication = buf[15] & 0x80 ?
 256                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 257
 258                         if (floppy->failed_pc)
 259                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 260
 261                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 262                                   floppy->sense_key, floppy->asc, floppy->ascq);
 263                 } else
 264                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 265                                         "Aborting request!\n");
 266         }
 267
 268         idefloppy_end_request(drive, uptodate, 0);
 269 }
 270
 271 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 272 {
 273         ide_init_pc(pc);
 274         pc->c[0] = GPCMD_REQUEST_SENSE;
 275         pc->c[4] = 255;
 276         pc->req_xfer = 18;
 277 }
 278
 279 /*
 280  * Called when an error was detected during the last packet command. We queue a
 281  * request sense packet command in the head of the request list.
 282  */
 283 static void idefloppy_retry_pc(ide_drive_t *drive)
 284 {
 285         struct ide_floppy_obj *floppy = drive->driver_data;
 286         struct request *rq = &floppy->request_sense_rq;
 287         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
 288
 289         (void)ide_read_error(drive);
 290         idefloppy_create_request_sense_cmd(pc);
 291         idefloppy_queue_pc_head(drive, pc, rq);
 292 }
 293
 294 /* The usual interrupt handler called during a packet command. */
 295 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 296 {
 297         idefloppy_floppy_t *floppy = drive->driver_data;
 298
 299         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 300                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 301                            idefloppy_retry_pc, NULL, ide_io_buffers);
 302 }
 303
 304 /*
 305  * What we have here is a classic case of a top half / bottom half interrupt
 306  * service routine. In interrupt mode, the device sends an interrupt to signal
 307  * that it is ready to receive a packet. However, we need to delay about 2-3
 308  * ticks before issuing the packet or we gets in trouble.
 309  */
 310 static int idefloppy_transfer_pc(ide_drive_t *drive)
 311 {
 312         idefloppy_floppy_t *floppy = drive->driver_data;
 313
 314         /* Send the actual packet */
 315         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 316
 317         /* Timeout for the packet command */
 318         return IDEFLOPPY_WAIT_CMD;
 319 }
 320
 321
 322 /*
 323  * Called as an interrupt (or directly). When the device says it's ready for a
 324  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 325  * transfer_pc.
 326  */
 327 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 328 {
 329         idefloppy_floppy_t *floppy = drive->driver_data;
 330         struct ide_atapi_pc *pc = floppy->pc;
 331         ide_expiry_t *expiry;
 332         unsigned int timeout;
 333
 334         /*
 335          * The following delay solves a problem with ATAPI Zip 100 drives
 336          * where the Busy flag was apparently being deasserted before the
 337          * unit was ready to receive data. This was happening on a
 338          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 339          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 340          * used until after the packet is moved in about 50 msec.
 341          */
 342         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 343                 timeout = floppy->ticks;
 344                 expiry = &idefloppy_transfer_pc;
 345         } else {
 346                 timeout = IDEFLOPPY_WAIT_CMD;
 347                 expiry = NULL;
 348         }
 349
 350         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 351 }
 352
 353 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 354                                     struct ide_atapi_pc *pc)
 355 {
 356         /* supress error messages resulting from Medium not present */
 357         if (floppy->sense_key == 0x02 &&
 358             floppy->asc       == 0x3a &&
 359             floppy->ascq      == 0x00)
 360                 return;
 361
 362         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 363                         "asc = %2x, ascq = %2x\n",
 364                         floppy->drive->name, pc->c[0], floppy->sense_key,
 365                         floppy->asc, floppy->ascq);
 366
 367 }
 368
 369 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 370                 struct ide_atapi_pc *pc)
 371 {
 372         idefloppy_floppy_t *floppy = drive->driver_data;
 373
 374         if (floppy->failed_pc == NULL &&
 375             pc->c[0] != GPCMD_REQUEST_SENSE)
 376                 floppy->failed_pc = pc;
 377         /* Set the current packet command */
 378         floppy->pc = pc;
 379
 380         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 381                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 382                         ide_floppy_report_error(floppy, pc);
 383                 /* Giving up */
 384                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 385
 386                 floppy->failed_pc = NULL;
 387                 drive->pc_callback(drive);
 388                 return ide_stopped;
 389         }
 390
 391         debug_log("Retry number - %d\n", pc->retries);
 392
 393         pc->retries++;
 394
 395         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 396                             IDEFLOPPY_WAIT_CMD, NULL);
 397 }
 398
 399 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 400 {
 401         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 402
 403         ide_init_pc(pc);
 404         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 405         pc->c[4] = prevent;
 406 }
 407
 408 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 409 {
 410         ide_init_pc(pc);
 411         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 412         pc->c[7] = 255;
 413         pc->c[8] = 255;
 414         pc->req_xfer = 255;
 415 }
 416
 417 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 418                 int l, int flags)
 419 {
 420         ide_init_pc(pc);
 421         pc->c[0] = GPCMD_FORMAT_UNIT;
 422         pc->c[1] = 0x17;
 423
 424         memset(pc->buf, 0, 12);
 425         pc->buf[1] = 0xA2;
 426         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 427
 428         if (flags & 1)                          /* Verify bit on... */
 429                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 430         pc->buf[3] = 8;
 431
 432         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 433         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 434         pc->buf_size = 12;
 435         pc->flags |= PC_FLAG_WRITING;
 436 }
 437
 438 /* A mode sense command is used to "sense" floppy parameters. */
 439 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 440                                             u8 page_code)
 441 {
 442         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 443
 444         ide_init_pc(pc);
 445         pc->c[0] = GPCMD_MODE_SENSE_10;
 446         pc->c[1] = 0;
 447         pc->c[2] = page_code;
 448
 449         switch (page_code) {
 450         case IDEFLOPPY_CAPABILITIES_PAGE:
 451                 length += 12;
 452                 break;
 453         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 454                 length += 32;
 455                 break;
 456         default:
 457                 printk(KERN_ERR "ide-floppy: unsupported page code "
 458                                 "in create_mode_sense_cmd\n");
 459         }
 460         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 461         pc->req_xfer = length;
 462 }
 463
 464 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 465 {
 466         ide_init_pc(pc);
 467         pc->c[0] = GPCMD_START_STOP_UNIT;
 468         pc->c[4] = start;
 469 }
 470
 471 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 472                                     struct ide_atapi_pc *pc, struct request *rq,
 473                                     unsigned long sector)
 474 {
 475         int block = sector / floppy->bs_factor;
 476         int blocks = rq->nr_sectors / floppy->bs_factor;
 477         int cmd = rq_data_dir(rq);
 478
 479         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 480                 block, blocks);
 481
 482         ide_init_pc(pc);
 483         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 484         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 485         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 486
 487         memcpy(rq->cmd, pc->c, 12);
 488
 489         pc->rq = rq;
 490         pc->b_count = 0;
 491         if (rq->cmd_flags & REQ_RW)
 492                 pc->flags |= PC_FLAG_WRITING;
 493         pc->buf = NULL;
 494         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 495         pc->flags |= PC_FLAG_DMA_OK;
 496 }
 497
 498 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 499                 struct ide_atapi_pc *pc, struct request *rq)
 500 {
 501         ide_init_pc(pc);
 502         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 503         pc->rq = rq;
 504         pc->b_count = 0;
 505         if (rq->data_len && rq_data_dir(rq) == WRITE)
 506                 pc->flags |= PC_FLAG_WRITING;
 507         pc->buf = rq->data;
 508         if (rq->bio)
 509                 pc->flags |= PC_FLAG_DMA_OK;
 510         /*
 511          * possibly problematic, doesn't look like ide-floppy correctly
 512          * handled scattered requests if dma fails...
 513          */
 514         pc->req_xfer = pc->buf_size = rq->data_len;
 515 }
 516
 517 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 518                 struct request *rq, sector_t block_s)
 519 {
 520         idefloppy_floppy_t *floppy = drive->driver_data;
 521         ide_hwif_t *hwif = drive->hwif;
 522         struct ide_atapi_pc *pc;
 523         unsigned long block = (unsigned long)block_s;
 524
 525         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 526                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 527                   rq->cmd[0], rq->cmd_type, rq->errors);
 528
 529         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 530                   __func__, (long)rq->sector, rq->nr_sectors,
 531                   rq->current_nr_sectors);
 532
 533         if (rq->errors >= ERROR_MAX) {
 534                 if (floppy->failed_pc)
 535                         ide_floppy_report_error(floppy, floppy->failed_pc);
 536                 else
 537                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 538                                 drive->name);
 539                 idefloppy_end_request(drive, 0, 0);
 540                 return ide_stopped;
 541         }
 542         if (blk_fs_request(rq)) {
 543                 if (((long)rq->sector % floppy->bs_factor) ||
 544                     (rq->nr_sectors % floppy->bs_factor)) {
 545                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 546                                         drive->name);
 547                         idefloppy_end_request(drive, 0, 0);
 548                         return ide_stopped;
 549                 }
 550                 pc = &floppy->queued_pc;
 551                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 552         } else if (blk_special_request(rq)) {
 553                 pc = (struct ide_atapi_pc *) rq->buffer;
 554         } else if (blk_pc_request(rq)) {
 555                 pc = &floppy->queued_pc;
 556                 idefloppy_blockpc_cmd(floppy, pc, rq);
 557         } else {
 558                 blk_dump_rq_flags(rq,
 559                         "ide-floppy: unsupported command in queue");
 560                 idefloppy_end_request(drive, 0, 0);
 561                 return ide_stopped;
 562         }
 563
 564         ide_init_sg_cmd(drive, rq);
 565         ide_map_sg(drive, rq);
 566
 567         pc->sg = hwif->sg_table;
 568         pc->sg_cnt = hwif->sg_nents;
 569
 570         pc->rq = rq;
 571
 572         return idefloppy_issue_pc(drive, pc);
 573 }
 574
 575 /*
 576  * Add a special packet command request to the tail of the request queue,
 577  * and wait for it to be serviced.
 578  */
 579 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 580 {
 581         struct ide_floppy_obj *floppy = drive->driver_data;
 582         struct request *rq;
 583         int error;
 584
 585         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 586         rq->buffer = (char *) pc;
 587         rq->cmd_type = REQ_TYPE_SPECIAL;
 588         memcpy(rq->cmd, pc->c, 12);
 589         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 590         blk_put_request(rq);
 591
 592         return error;
 593 }
 594
 595 /*
 596  * Look at the flexible disk page parameters. We ignore the CHS capacity
 597  * parameters and use the LBA parameters instead.
 598  */
 599 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 600 {
 601         idefloppy_floppy_t *floppy = drive->driver_data;
 602         struct ide_atapi_pc pc;
 603         u8 *page;
 604         int capacity, lba_capacity;
 605         u16 transfer_rate, sector_size, cyls, rpm;
 606         u8 heads, sectors;
 607
 608         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 609
 610         if (idefloppy_queue_pc_tail(drive, &pc)) {
 611                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 612                                 " parameters\n");
 613                 return 1;
 614         }
 615         floppy->wp = !!(pc.buf[3] & 0x80);
 616         set_disk_ro(floppy->disk, floppy->wp);
 617         page = &pc.buf[8];
 618
 619         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 620         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 621         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 622         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 623         heads         = pc.buf[8 + 4];
 624         sectors       = pc.buf[8 + 5];
 625
 626         capacity = cyls * heads * sectors * sector_size;
 627
 628         if (memcmp(page, &floppy->flexible_disk_page, 32))
 629                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 630                                 "%d sector size, %d rpm\n",
 631                                 drive->name, capacity / 1024, cyls, heads,
 632                                 sectors, transfer_rate / 8, sector_size, rpm);
 633
 634         memcpy(&floppy->flexible_disk_page, page, 32);
 635         drive->bios_cyl = cyls;
 636         drive->bios_head = heads;
 637         drive->bios_sect = sectors;
 638         lba_capacity = floppy->blocks * floppy->block_size;
 639
 640         if (capacity < lba_capacity) {
 641                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 642                         "bytes, but the drive only handles %d\n",
 643                         drive->name, lba_capacity, capacity);
 644                 floppy->blocks = floppy->block_size ?
 645                         capacity / floppy->block_size : 0;
 646         }
 647         return 0;
 648 }
 649
 650 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 651 {
 652         idefloppy_floppy_t *floppy = drive->driver_data;
 653         struct ide_atapi_pc pc;
 654
 655         floppy->srfp = 0;
 656
 657         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE);
 658         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 659
 660         if (idefloppy_queue_pc_tail(drive, &pc))
 661                 return 1;
 662
 663         floppy->srfp = pc.buf[8 + 2] & 0x40;
 664         return 0;
 665 }
 666
 667 /*
 668  * Determine if a media is present in the floppy drive, and if so, its LBA
 669  * capacity.
 670  */
 671 static int ide_floppy_get_capacity(ide_drive_t *drive)
 672 {
 673         idefloppy_floppy_t *floppy = drive->driver_data;
 674         struct ide_atapi_pc pc;
 675         u8 *cap_desc;
 676         u8 header_len, desc_cnt;
 677         int i, rc = 1, blocks, length;
 678
 679         drive->bios_cyl = 0;
 680         drive->bios_head = drive->bios_sect = 0;
 681         floppy->blocks = 0;
 682         floppy->bs_factor = 1;
 683         set_capacity(floppy->disk, 0);
 684
 685         idefloppy_create_read_capacity_cmd(&pc);
 686         if (idefloppy_queue_pc_tail(drive, &pc)) {
 687                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 688                 return 1;
 689         }
 690         header_len = pc.buf[3];
 691         cap_desc = &pc.buf[4];
 692         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 693
 694         for (i = 0; i < desc_cnt; i++) {
 695                 unsigned int desc_start = 4 + i*8;
 696
 697                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 698                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 699
 700                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 701                                 i, blocks * length / 1024, blocks, length);
 702
 703                 if (i)
 704                         continue;
 705                 /*
 706                  * the code below is valid only for the 1st descriptor, ie i=0
 707                  */
 708
 709                 switch (pc.buf[desc_start + 4] & 0x03) {
 710                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 711                 case CAPACITY_UNFORMATTED:
 712                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 713                                 /*
 714                                  * If it is not a clik drive, break out
 715                                  * (maintains previous driver behaviour)
 716                                  */
 717                                 break;
 718                 case CAPACITY_CURRENT:
 719                         /* Normal Zip/LS-120 disks */
 720                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 721                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 722                                         "sector size\n", drive->name,
 723                                         blocks * length / 1024, blocks, length);
 724                         memcpy(&floppy->cap_desc, cap_desc, 8);
 725
 726                         if (!length || length % 512) {
 727                                 printk(KERN_NOTICE "%s: %d bytes block size "
 728                                         "not supported\n", drive->name, length);
 729                         } else {
 730                                 floppy->blocks = blocks;
 731                                 floppy->block_size = length;
 732                                 floppy->bs_factor = length / 512;
 733                                 if (floppy->bs_factor != 1)
 734                                         printk(KERN_NOTICE "%s: warning: non "
 735                                                 "512 bytes block size not "
 736                                                 "fully supported\n",
 737                                                 drive->name);
 738                                 rc = 0;
 739                         }
 740                         break;
 741                 case CAPACITY_NO_CARTRIDGE:
 742                         /*
 743                          * This is a KERN_ERR so it appears on screen
 744                          * for the user to see
 745                          */
 746                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 747                         break;
 748                 case CAPACITY_INVALID:
 749                         printk(KERN_ERR "%s: Invalid capacity for disk "
 750                                 "in drive\n", drive->name);
 751                         break;
 752                 }
 753                 debug_log("Descriptor 0 Code: %d\n",
 754                           pc.buf[desc_start + 4] & 0x03);
 755         }
 756
 757         /* Clik! disk does not support get_flexible_disk_page */
 758         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 759                 (void) ide_floppy_get_flexible_disk_page(drive);
 760
 761         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 762         return rc;
 763 }
 764
 765 /*
 766  * Obtain the list of formattable capacities.
 767  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 768  * descriptors to userland, instead of our own structures.
 769  *
 770  * Userland gives us the following structure:
 771  *
 772  * struct idefloppy_format_capacities {
 773  *      int nformats;
 774  *      struct {
 775  *              int nblocks;
 776  *              int blocksize;
 777  *      } formats[];
 778  * };
 779  *
 780  * userland initializes nformats to the number of allocated formats[] records.
 781  * On exit we set nformats to the number of records we've actually initialized.
 782  */
 783
 784 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 785 {
 786         struct ide_atapi_pc pc;
 787         u8 header_len, desc_cnt;
 788         int i, blocks, length, u_array_size, u_index;
 789         int __user *argp;
 790
 791         if (get_user(u_array_size, arg))
 792                 return -EFAULT;
 793
 794         if (u_array_size <= 0)
 795                 return -EINVAL;
 796
 797         idefloppy_create_read_capacity_cmd(&pc);
 798         if (idefloppy_queue_pc_tail(drive, &pc)) {
 799                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 800                 return -EIO;
 801         }
 802
 803         header_len = pc.buf[3];
 804         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 805
 806         u_index = 0;
 807         argp = arg + 1;
 808
 809         /*
 810          * We always skip the first capacity descriptor.  That's the current
 811          * capacity.  We are interested in the remaining descriptors, the
 812          * formattable capacities.
 813          */
 814         for (i = 1; i < desc_cnt; i++) {
 815                 unsigned int desc_start = 4 + i*8;
 816
 817                 if (u_index >= u_array_size)
 818                         break;  /* User-supplied buffer too small */
 819
 820                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 821                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 822
 823                 if (put_user(blocks, argp))
 824                         return -EFAULT;
 825
 826                 ++argp;
 827
 828                 if (put_user(length, argp))
 829                         return -EFAULT;
 830
 831                 ++argp;
 832
 833                 ++u_index;
 834         }
 835
 836         if (put_user(u_index, arg))
 837                 return -EFAULT;
 838
 839         return 0;
 840 }
 841
 842 /*
 843  * Get ATAPI_FORMAT_UNIT progress indication.
 844  *
 845  * Userland gives a pointer to an int.  The int is set to a progress
 846  * indicator 0-65536, with 65536=100%.
 847  *
 848  * If the drive does not support format progress indication, we just check
 849  * the dsc bit, and return either 0 or 65536.
 850  */
 851
 852 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 853 {
 854         idefloppy_floppy_t *floppy = drive->driver_data;
 855         struct ide_atapi_pc pc;
 856         int progress_indication = 0x10000;
 857
 858         if (floppy->srfp) {
 859                 idefloppy_create_request_sense_cmd(&pc);
 860                 if (idefloppy_queue_pc_tail(drive, &pc))
 861                         return -EIO;
 862
 863                 if (floppy->sense_key == 2 &&
 864                     floppy->asc == 4 &&
 865                     floppy->ascq == 4)
 866                         progress_indication = floppy->progress_indication;
 867
 868                 /* Else assume format_unit has finished, and we're at 0x10000 */
 869         } else {
 870                 ide_hwif_t *hwif = drive->hwif;
 871                 unsigned long flags;
 872                 u8 stat;
 873
 874                 local_irq_save(flags);
 875                 stat = hwif->tp_ops->read_status(hwif);
 876                 local_irq_restore(flags);
 877
 878                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 879         }
 880
 881         if (put_user(progress_indication, arg))
 882                 return -EFAULT;
 883
 884         return 0;
 885 }
 886
 887 static sector_t idefloppy_capacity(ide_drive_t *drive)
 888 {
 889         idefloppy_floppy_t *floppy = drive->driver_data;
 890         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 891
 892         return capacity;
 893 }
 894
 895 #ifdef CONFIG_IDE_PROC_FS
 896 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 897 ide_devset_rw(bios_head, 0,  255, bios_head);
 898 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 899
 900 static int get_ticks(ide_drive_t *drive)
 901 {
 902         idefloppy_floppy_t *floppy = drive->driver_data;
 903         return floppy->ticks;
 904 }
 905
 906 static int set_ticks(ide_drive_t *drive, int arg)
 907 {
 908         idefloppy_floppy_t *floppy = drive->driver_data;
 909         floppy->ticks = arg;
 910         return 0;
 911 }
 912
 913 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
 914
 915 static const struct ide_devset *idefloppy_settings[] = {
 916         &ide_devset_bios_cyl,
 917         &ide_devset_bios_head,
 918         &ide_devset_bios_sect,
 919         &ide_devset_ticks,
 920         NULL
 921 };
 922 #endif
 923
 924 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 925 {
 926         u16 *id = drive->id;
 927         u8 gcw[2];
 928
 929         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 930
 931         drive->pc_callback = ide_floppy_callback;
 932
 933         if (((gcw[0] & 0x60) >> 5) == 1)
 934                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
 935         /*
 936          * We used to check revisions here. At this point however I'm giving up.
 937          * Just assume they are all broken, its easier.
 938          *
 939          * The actual reason for the workarounds was likely a driver bug after
 940          * all rather than a firmware bug, and the workaround below used to hide
 941          * it. It should be fixed as of version 1.9, but to be on the safe side
 942          * we'll leave the limitation below for the 2.2.x tree.
 943          */
 944         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
 945                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
 946                 /* This value will be visible in the /proc/ide/hdx/settings */
 947                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
 948                 blk_queue_max_sectors(drive->queue, 64);
 949         }
 950
 951         /*
 952          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
 953          * nasty clicking noises without it, so please don't remove this.
 954          */
 955         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
 956                 blk_queue_max_sectors(drive->queue, 64);
 957                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
 958         }
 959
 960         (void) ide_floppy_get_capacity(drive);
 961
 962         ide_proc_register_driver(drive, floppy->driver);
 963 }
 964
 965 static void ide_floppy_remove(ide_drive_t *drive)
 966 {
 967         idefloppy_floppy_t *floppy = drive->driver_data;
 968         struct gendisk *g = floppy->disk;
 969
 970         ide_proc_unregister_driver(drive, floppy->driver);
 971
 972         del_gendisk(g);
 973
 974         ide_floppy_put(floppy);
 975 }
 976
 977 static void idefloppy_cleanup_obj(struct kref *kref)
 978 {
 979         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
 980         ide_drive_t *drive = floppy->drive;
 981         struct gendisk *g = floppy->disk;
 982
 983         drive->driver_data = NULL;
 984         g->private_data = NULL;
 985         put_disk(g);
 986         kfree(floppy);
 987 }
 988
 989 #ifdef CONFIG_IDE_PROC_FS
 990 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
 991                 int count, int *eof, void *data)
 992 {
 993         ide_drive_t*drive = (ide_drive_t *)data;
 994         int len;
 995
 996         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
 997         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 998 }
 999
1000 static ide_proc_entry_t idefloppy_proc[] = {
1001         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1002         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1003         { NULL, 0, NULL, NULL }
1004 };
1005 #endif  /* CONFIG_IDE_PROC_FS */
1006
1007 static int ide_floppy_probe(ide_drive_t *);
1008
1009 static ide_driver_t idefloppy_driver = {
1010         .gen_driver = {
1011                 .owner          = THIS_MODULE,
1012                 .name           = "ide-floppy",
1013                 .bus            = &ide_bus_type,
1014         },
1015         .probe                  = ide_floppy_probe,
1016         .remove                 = ide_floppy_remove,
1017         .version                = IDEFLOPPY_VERSION,
1018         .media                  = ide_floppy,
1019         .do_request             = idefloppy_do_request,
1020         .end_request            = idefloppy_end_request,
1021         .error                  = __ide_error,
1022 #ifdef CONFIG_IDE_PROC_FS
1023         .proc                   = idefloppy_proc,
1024         .settings               = idefloppy_settings,
1025 #endif
1026 };
1027
1028 static void ide_floppy_set_media_lock(ide_drive_t *drive, int on)
1029 {
1030         struct ide_atapi_pc pc;
1031
1032         /* IOMEGA Clik! drives do not support lock/unlock commands */
1033         if ((drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE) == 0) {
1034                 idefloppy_create_prevent_cmd(&pc, on);
1035                 (void)idefloppy_queue_pc_tail(drive, &pc);
1036         }
1037 }
1038
1039 static int idefloppy_open(struct inode *inode, struct file *filp)
1040 {
1041         struct gendisk *disk = inode->i_bdev->bd_disk;
1042         struct ide_floppy_obj *floppy;
1043         ide_drive_t *drive;
1044         struct ide_atapi_pc pc;
1045         int ret = 0;
1046
1047         debug_log("Reached %s\n", __func__);
1048
1049         floppy = ide_floppy_get(disk);
1050         if (!floppy)
1051                 return -ENXIO;
1052
1053         drive = floppy->drive;
1054
1055         floppy->openers++;
1056
1057         if (floppy->openers == 1) {
1058                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1059                 /* Just in case */
1060
1061                 ide_init_pc(&pc);
1062                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1063
1064                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1065                         idefloppy_create_start_stop_cmd(&pc, 1);
1066                         (void) idefloppy_queue_pc_tail(drive, &pc);
1067                 }
1068
1069                 if (ide_floppy_get_capacity(drive)
1070                    && (filp->f_flags & O_NDELAY) == 0
1071                     /*
1072                      * Allow O_NDELAY to open a drive without a disk, or with an
1073                      * unreadable disk, so that we can get the format capacity
1074                      * of the drive or begin the format - Sam
1075                      */
1076                     ) {
1077                         ret = -EIO;
1078                         goto out_put_floppy;
1079                 }
1080
1081                 if (floppy->wp && (filp->f_mode & 2)) {
1082                         ret = -EROFS;
1083                         goto out_put_floppy;
1084                 }
1085
1086                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1087                 ide_floppy_set_media_lock(drive, 1);
1088                 check_disk_change(inode->i_bdev);
1089         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1090                 ret = -EBUSY;
1091                 goto out_put_floppy;
1092         }
1093         return 0;
1094
1095 out_put_floppy:
1096         floppy->openers--;
1097         ide_floppy_put(floppy);
1098         return ret;
1099 }
1100
1101 static int idefloppy_release(struct inode *inode, struct file *filp)
1102 {
1103         struct gendisk *disk = inode->i_bdev->bd_disk;
1104         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1105         ide_drive_t *drive = floppy->drive;
1106
1107         debug_log("Reached %s\n", __func__);
1108
1109         if (floppy->openers == 1) {
1110                 ide_floppy_set_media_lock(drive, 0);
1111                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1112         }
1113
1114         floppy->openers--;
1115
1116         ide_floppy_put(floppy);
1117
1118         return 0;
1119 }
1120
1121 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1122 {
1123         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1124         ide_drive_t *drive = floppy->drive;
1125
1126         geo->heads = drive->bios_head;
1127         geo->sectors = drive->bios_sect;
1128         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1129         return 0;
1130 }
1131
1132 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1133                                unsigned long arg, unsigned int cmd)
1134 {
1135         idefloppy_floppy_t *floppy = drive->driver_data;
1136         int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
1137
1138         if (floppy->openers > 1)
1139                 return -EBUSY;
1140
1141         ide_floppy_set_media_lock(drive, prevent);
1142
1143         if (cmd == CDROMEJECT) {
1144                 idefloppy_create_start_stop_cmd(pc, 2);
1145                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1146         }
1147
1148         return 0;
1149 }
1150
1151 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1152 {
1153         idefloppy_floppy_t *floppy = drive->driver_data;
1154         struct ide_atapi_pc pc;
1155         int blocks, length, flags, err = 0;
1156
1157         if (floppy->openers > 1) {
1158                 /* Don't format if someone is using the disk */
1159                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1160                 return -EBUSY;
1161         }
1162
1163         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1164
1165         /*
1166          * Send ATAPI_FORMAT_UNIT to the drive.
1167          *
1168          * Userland gives us the following structure:
1169          *
1170          * struct idefloppy_format_command {
1171          *        int nblocks;
1172          *        int blocksize;
1173          *        int flags;
1174          *        } ;
1175          *
1176          * flags is a bitmask, currently, the only defined flag is:
1177          *
1178          *        0x01 - verify media after format.
1179          */
1180         if (get_user(blocks, arg) ||
1181                         get_user(length, arg+1) ||
1182                         get_user(flags, arg+2)) {
1183                 err = -EFAULT;
1184                 goto out;
1185         }
1186
1187         (void) idefloppy_get_sfrp_bit(drive);
1188         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1189
1190         if (idefloppy_queue_pc_tail(drive, &pc))
1191                 err = -EIO;
1192
1193 out:
1194         if (err)
1195                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1196         return err;
1197 }
1198
1199 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1200                                    unsigned int cmd, void __user *argp)
1201 {
1202         switch (cmd) {
1203         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1204                 return 0;
1205         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1206                 return ide_floppy_get_format_capacities(drive, argp);
1207         case IDEFLOPPY_IOCTL_FORMAT_START:
1208                 if (!(file->f_mode & 2))
1209                         return -EPERM;
1210                 return ide_floppy_format_unit(drive, (int __user *)argp);
1211         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1212                 return ide_floppy_get_format_progress(drive, argp);
1213         default:
1214                 return -ENOTTY;
1215         }
1216 }
1217
1218 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1219                         unsigned int cmd, unsigned long arg)
1220 {
1221         struct block_device *bdev = inode->i_bdev;
1222         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1223         ide_drive_t *drive = floppy->drive;
1224         struct ide_atapi_pc pc;
1225         void __user *argp = (void __user *)arg;
1226         int err;
1227
1228         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1229                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1230
1231         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1232         if (err != -ENOTTY)
1233                 return err;
1234
1235         /*
1236          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1237          * and CDROM_SEND_PACKET (legacy) ioctls
1238          */
1239         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1240                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1241                                         bdev->bd_disk, cmd, argp);
1242
1243         if (err == -ENOTTY)
1244                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1245
1246         return err;
1247 }
1248
1249 static int idefloppy_media_changed(struct gendisk *disk)
1250 {
1251         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1252         ide_drive_t *drive = floppy->drive;
1253         int ret;
1254
1255         /* do not scan partitions twice if this is a removable device */
1256         if (drive->attach) {
1257                 drive->attach = 0;
1258                 return 0;
1259         }
1260         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1261         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1262         return ret;
1263 }
1264
1265 static int idefloppy_revalidate_disk(struct gendisk *disk)
1266 {
1267         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1268         set_capacity(disk, idefloppy_capacity(floppy->drive));
1269         return 0;
1270 }
1271
1272 static struct block_device_operations idefloppy_ops = {
1273         .owner                  = THIS_MODULE,
1274         .open                   = idefloppy_open,
1275         .release                = idefloppy_release,
1276         .ioctl                  = idefloppy_ioctl,
1277         .getgeo                 = idefloppy_getgeo,
1278         .media_changed          = idefloppy_media_changed,
1279         .revalidate_disk        = idefloppy_revalidate_disk
1280 };
1281
1282 static int ide_floppy_probe(ide_drive_t *drive)
1283 {
1284         idefloppy_floppy_t *floppy;
1285         struct gendisk *g;
1286
1287         if (!strstr("ide-floppy", drive->driver_req))
1288                 goto failed;
1289
1290         if (drive->media != ide_floppy)
1291                 goto failed;
1292
1293         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1294                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1295                                 " of ide-floppy\n", drive->name);
1296                 goto failed;
1297         }
1298         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1299         if (!floppy) {
1300                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1301                                 " structure\n", drive->name);
1302                 goto failed;
1303         }
1304
1305         g = alloc_disk(1 << PARTN_BITS);
1306         if (!g)
1307                 goto out_free_floppy;
1308
1309         ide_init_disk(g, drive);
1310
1311         kref_init(&floppy->kref);
1312
1313         floppy->drive = drive;
1314         floppy->driver = &idefloppy_driver;
1315         floppy->disk = g;
1316
1317         g->private_data = &floppy->driver;
1318
1319         drive->driver_data = floppy;
1320
1321         idefloppy_setup(drive, floppy);
1322
1323         g->minors = 1 << PARTN_BITS;
1324         g->driverfs_dev = &drive->gendev;
1325         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1326         g->fops = &idefloppy_ops;
1327         drive->attach = 1;
1328         add_disk(g);
1329         return 0;
1330
1331 out_free_floppy:
1332         kfree(floppy);
1333 failed:
1334         return -ENODEV;
1335 }
1336
1337 static void __exit idefloppy_exit(void)
1338 {
1339         driver_unregister(&idefloppy_driver.gen_driver);
1340 }
1341
1342 static int __init idefloppy_init(void)
1343 {
1344         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1345         return driver_register(&idefloppy_driver.gen_driver);
1346 }
1347
1348 MODULE_ALIAS("ide:*m-floppy*");
1349 module_init(idefloppy_init);
1350 module_exit(idefloppy_exit);
1351 MODULE_LICENSE("GPL");
1352 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1353