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 #define PFX DRV_NAME ": "
  20
  21 #define IDEFLOPPY_VERSION "1.00"
  22
  23 #include <linux/module.h>
  24 #include <linux/types.h>
  25 #include <linux/string.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/timer.h>
  29 #include <linux/mm.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/major.h>
  32 #include <linux/errno.h>
  33 #include <linux/genhd.h>
  34 #include <linux/slab.h>
  35 #include <linux/cdrom.h>
  36 #include <linux/ide.h>
  37 #include <linux/hdreg.h>
  38 #include <linux/bitops.h>
  39 #include <linux/mutex.h>
  40 #include <linux/scatterlist.h>
  41
  42 #include <scsi/scsi_ioctl.h>
  43
  44 #include <asm/byteorder.h>
  45 #include <linux/irq.h>
  46 #include <linux/uaccess.h>
  47 #include <linux/io.h>
  48 #include <asm/unaligned.h>
  49
  50 #include "ide-floppy.h"
  51
  52 /* module parameters */
  53 static unsigned long debug_mask;
  54 module_param(debug_mask, ulong, 0644);
  55
  56 /* define to see debug info */
  57 #define IDEFLOPPY_DEBUG_LOG     0
  58
  59 #if IDEFLOPPY_DEBUG_LOG
  60 #define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args)
  61 #else
  62 #define ide_debug_log(lvl, fmt, args...) do {} while (0)
  63 #endif
  64
  65 /*
  66  * After each failed packet command we issue a request sense command and retry
  67  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  68  */
  69 #define IDEFLOPPY_MAX_PC_RETRIES        3
  70
  71 /* format capacities descriptor codes */
  72 #define CAPACITY_INVALID        0x00
  73 #define CAPACITY_UNFORMATTED    0x01
  74 #define CAPACITY_CURRENT        0x02
  75 #define CAPACITY_NO_CARTRIDGE   0x03
  76
  77 /*
  78  * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
  79  * was apparently being deasserted before the unit was ready to receive data.
  80  */
  81 #define IDEFLOPPY_PC_DELAY      (HZ/20) /* default delay for ZIP 100 (50ms) */
  82
  83 /* Error code returned in rq->errors to the higher part of the driver. */
  84 #define IDEFLOPPY_ERROR_GENERAL         101
  85
  86 static DEFINE_MUTEX(idefloppy_ref_mutex);
  87
  88 static void idefloppy_cleanup_obj(struct kref *);
  89
  90 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
  91 {
  92         struct ide_floppy_obj *floppy = NULL;
  93
  94         mutex_lock(&idefloppy_ref_mutex);
  95         floppy = ide_drv_g(disk, ide_floppy_obj);
  96         if (floppy) {
  97                 if (ide_device_get(floppy->drive))
  98                         floppy = NULL;
  99                 else
 100                         kref_get(&floppy->kref);
 101         }
 102         mutex_unlock(&idefloppy_ref_mutex);
 103         return floppy;
 104 }
 105
 106 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 107 {
 108         ide_drive_t *drive = floppy->drive;
 109
 110         mutex_lock(&idefloppy_ref_mutex);
 111         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 112         ide_device_put(drive);
 113         mutex_unlock(&idefloppy_ref_mutex);
 114 }
 115
 116 /*
 117  * Used to finish servicing a request. For read/write requests, we will call
 118  * ide_end_request to pass to the next buffer.
 119  */
 120 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 121 {
 122         idefloppy_floppy_t *floppy = drive->driver_data;
 123         struct request *rq = HWGROUP(drive)->rq;
 124         int error;
 125
 126         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 127
 128         switch (uptodate) {
 129         case 0:
 130                 error = IDEFLOPPY_ERROR_GENERAL;
 131                 break;
 132
 133         case 1:
 134                 error = 0;
 135                 break;
 136
 137         default:
 138                 error = uptodate;
 139         }
 140
 141         if (error)
 142                 floppy->failed_pc = NULL;
 143         /* Why does this happen? */
 144         if (!rq)
 145                 return 0;
 146         if (!blk_special_request(rq)) {
 147                 /* our real local end request function */
 148                 ide_end_request(drive, uptodate, nsecs);
 149                 return 0;
 150         }
 151         rq->errors = error;
 152         /* fixme: need to move this local also */
 153         ide_end_drive_cmd(drive, 0, 0);
 154         return 0;
 155 }
 156
 157 static void idefloppy_update_buffers(ide_drive_t *drive,
 158                                 struct ide_atapi_pc *pc)
 159 {
 160         struct request *rq = pc->rq;
 161         struct bio *bio = rq->bio;
 162
 163         while ((bio = rq->bio) != NULL)
 164                 idefloppy_end_request(drive, 1, 0);
 165 }
 166
 167 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
 168 {
 169         idefloppy_floppy_t *floppy = drive->driver_data;
 170         struct ide_atapi_pc *pc = drive->pc;
 171         int uptodate = pc->error ? 0 : 1;
 172
 173         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 174
 175         if (floppy->failed_pc == pc)
 176                 floppy->failed_pc = NULL;
 177
 178         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 179             (pc->rq && blk_pc_request(pc->rq)))
 180                 uptodate = 1; /* FIXME */
 181         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 182                 u8 *buf = pc->buf;
 183
 184                 if (!pc->error) {
 185                         floppy->sense_key = buf[2] & 0x0F;
 186                         floppy->asc = buf[12];
 187                         floppy->ascq = buf[13];
 188                         floppy->progress_indication = buf[15] & 0x80 ?
 189                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 190
 191                         if (floppy->failed_pc)
 192                                 ide_debug_log(IDE_DBG_PC, "pc = %x, ",
 193                                               floppy->failed_pc->c[0]);
 194
 195                         ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
 196                                       "ascq = %x\n", floppy->sense_key,
 197                                       floppy->asc, floppy->ascq);
 198                 } else
 199                         printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
 200                                "Aborting request!\n");
 201         }
 202
 203         idefloppy_end_request(drive, uptodate, 0);
 204 }
 205
 206 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 207                                     struct ide_atapi_pc *pc)
 208 {
 209         /* supress error messages resulting from Medium not present */
 210         if (floppy->sense_key == 0x02 &&
 211             floppy->asc       == 0x3a &&
 212             floppy->ascq      == 0x00)
 213                 return;
 214
 215         printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
 216                         "asc = %2x, ascq = %2x\n",
 217                         floppy->drive->name, pc->c[0], floppy->sense_key,
 218                         floppy->asc, floppy->ascq);
 219
 220 }
 221
 222 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 223                 struct ide_atapi_pc *pc)
 224 {
 225         idefloppy_floppy_t *floppy = drive->driver_data;
 226
 227         if (floppy->failed_pc == NULL &&
 228             pc->c[0] != GPCMD_REQUEST_SENSE)
 229                 floppy->failed_pc = pc;
 230
 231         /* Set the current packet command */
 232         drive->pc = pc;
 233
 234         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 235                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 236                         ide_floppy_report_error(floppy, pc);
 237                 /* Giving up */
 238                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 239
 240                 floppy->failed_pc = NULL;
 241                 drive->pc_callback(drive, 0);
 242                 return ide_stopped;
 243         }
 244
 245         ide_debug_log(IDE_DBG_FUNC, "%s: Retry #%d\n", __func__, pc->retries);
 246
 247         pc->retries++;
 248
 249         return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL);
 250 }
 251
 252 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 253 {
 254         ide_init_pc(pc);
 255         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 256         pc->c[7] = 255;
 257         pc->c[8] = 255;
 258         pc->req_xfer = 255;
 259 }
 260
 261 /* A mode sense command is used to "sense" floppy parameters. */
 262 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
 263 {
 264         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 265
 266         ide_init_pc(pc);
 267         pc->c[0] = GPCMD_MODE_SENSE_10;
 268         pc->c[1] = 0;
 269         pc->c[2] = page_code;
 270
 271         switch (page_code) {
 272         case IDEFLOPPY_CAPABILITIES_PAGE:
 273                 length += 12;
 274                 break;
 275         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 276                 length += 32;
 277                 break;
 278         default:
 279                 printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
 280         }
 281         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 282         pc->req_xfer = length;
 283 }
 284
 285 static void idefloppy_create_rw_cmd(ide_drive_t *drive,
 286                                     struct ide_atapi_pc *pc, struct request *rq,
 287                                     unsigned long sector)
 288 {
 289         idefloppy_floppy_t *floppy = drive->driver_data;
 290         int block = sector / floppy->bs_factor;
 291         int blocks = rq->nr_sectors / floppy->bs_factor;
 292         int cmd = rq_data_dir(rq);
 293
 294         ide_debug_log(IDE_DBG_FUNC, "%s: block: %d, blocks: %d\n", __func__,
 295                       block, blocks);
 296
 297         ide_init_pc(pc);
 298         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 299         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 300         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 301
 302         memcpy(rq->cmd, pc->c, 12);
 303
 304         pc->rq = rq;
 305         pc->b_count = 0;
 306         if (rq->cmd_flags & REQ_RW)
 307                 pc->flags |= PC_FLAG_WRITING;
 308         pc->buf = NULL;
 309         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 310         pc->flags |= PC_FLAG_DMA_OK;
 311 }
 312
 313 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 314                 struct ide_atapi_pc *pc, struct request *rq)
 315 {
 316         ide_init_pc(pc);
 317         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 318         pc->rq = rq;
 319         pc->b_count = 0;
 320         if (rq->data_len && rq_data_dir(rq) == WRITE)
 321                 pc->flags |= PC_FLAG_WRITING;
 322         pc->buf = rq->data;
 323         if (rq->bio)
 324                 pc->flags |= PC_FLAG_DMA_OK;
 325         /*
 326          * possibly problematic, doesn't look like ide-floppy correctly
 327          * handled scattered requests if dma fails...
 328          */
 329         pc->req_xfer = pc->buf_size = rq->data_len;
 330 }
 331
 332 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 333                 struct request *rq, sector_t block_s)
 334 {
 335         idefloppy_floppy_t *floppy = drive->driver_data;
 336         ide_hwif_t *hwif = drive->hwif;
 337         struct ide_atapi_pc *pc;
 338         unsigned long block = (unsigned long)block_s;
 339
 340         ide_debug_log(IDE_DBG_FUNC, "%s: dev: %s, cmd: 0x%x, cmd_type: %x, "
 341                       "errors: %d\n",
 342                       __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 343                       rq->cmd[0], rq->cmd_type, rq->errors);
 344
 345         ide_debug_log(IDE_DBG_FUNC, "%s: sector: %ld, nr_sectors: %ld, "
 346                       "current_nr_sectors: %d\n",
 347                       __func__, (long)rq->sector, rq->nr_sectors,
 348                       rq->current_nr_sectors);
 349
 350         if (rq->errors >= ERROR_MAX) {
 351                 if (floppy->failed_pc)
 352                         ide_floppy_report_error(floppy, floppy->failed_pc);
 353                 else
 354                         printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
 355
 356                 idefloppy_end_request(drive, 0, 0);
 357                 return ide_stopped;
 358         }
 359         if (blk_fs_request(rq)) {
 360                 if (((long)rq->sector % floppy->bs_factor) ||
 361                     (rq->nr_sectors % floppy->bs_factor)) {
 362                         printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
 363                                 drive->name);
 364                         idefloppy_end_request(drive, 0, 0);
 365                         return ide_stopped;
 366                 }
 367                 pc = &floppy->queued_pc;
 368                 idefloppy_create_rw_cmd(drive, pc, rq, block);
 369         } else if (blk_special_request(rq)) {
 370                 pc = (struct ide_atapi_pc *) rq->buffer;
 371         } else if (blk_pc_request(rq)) {
 372                 pc = &floppy->queued_pc;
 373                 idefloppy_blockpc_cmd(floppy, pc, rq);
 374         } else {
 375                 blk_dump_rq_flags(rq, PFX "unsupported command in queue");
 376                 idefloppy_end_request(drive, 0, 0);
 377                 return ide_stopped;
 378         }
 379
 380         ide_init_sg_cmd(drive, rq);
 381         ide_map_sg(drive, rq);
 382
 383         pc->sg = hwif->sg_table;
 384         pc->sg_cnt = hwif->sg_nents;
 385
 386         pc->rq = rq;
 387
 388         return idefloppy_issue_pc(drive, pc);
 389 }
 390
 391 /*
 392  * Look at the flexible disk page parameters. We ignore the CHS capacity
 393  * parameters and use the LBA parameters instead.
 394  */
 395 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 396 {
 397         idefloppy_floppy_t *floppy = drive->driver_data;
 398         struct gendisk *disk = floppy->disk;
 399         struct ide_atapi_pc pc;
 400         u8 *page;
 401         int capacity, lba_capacity;
 402         u16 transfer_rate, sector_size, cyls, rpm;
 403         u8 heads, sectors;
 404
 405         ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 406
 407         if (ide_queue_pc_tail(drive, disk, &pc)) {
 408                 printk(KERN_ERR PFX "Can't get flexible disk page params\n");
 409                 return 1;
 410         }
 411
 412         if (pc.buf[3] & 0x80)
 413                 drive->atapi_flags |= IDE_AFLAG_WP;
 414         else
 415                 drive->atapi_flags &= ~IDE_AFLAG_WP;
 416
 417         set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
 418
 419         page = &pc.buf[8];
 420
 421         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 422         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 423         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 424         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 425         heads         = pc.buf[8 + 4];
 426         sectors       = pc.buf[8 + 5];
 427
 428         capacity = cyls * heads * sectors * sector_size;
 429
 430         if (memcmp(page, &floppy->flexible_disk_page, 32))
 431                 printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 432                                 "%d sector size, %d rpm\n",
 433                                 drive->name, capacity / 1024, cyls, heads,
 434                                 sectors, transfer_rate / 8, sector_size, rpm);
 435
 436         memcpy(&floppy->flexible_disk_page, page, 32);
 437         drive->bios_cyl = cyls;
 438         drive->bios_head = heads;
 439         drive->bios_sect = sectors;
 440         lba_capacity = floppy->blocks * floppy->block_size;
 441
 442         if (capacity < lba_capacity) {
 443                 printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
 444                         "bytes, but the drive only handles %d\n",
 445                         drive->name, lba_capacity, capacity);
 446                 floppy->blocks = floppy->block_size ?
 447                         capacity / floppy->block_size : 0;
 448                 drive->capacity64 = floppy->blocks * floppy->bs_factor;
 449         }
 450
 451         return 0;
 452 }
 453
 454 /*
 455  * Determine if a media is present in the floppy drive, and if so, its LBA
 456  * capacity.
 457  */
 458 static int ide_floppy_get_capacity(ide_drive_t *drive)
 459 {
 460         idefloppy_floppy_t *floppy = drive->driver_data;
 461         struct gendisk *disk = floppy->disk;
 462         struct ide_atapi_pc pc;
 463         u8 *cap_desc;
 464         u8 header_len, desc_cnt;
 465         int i, rc = 1, blocks, length;
 466
 467         drive->bios_cyl = 0;
 468         drive->bios_head = drive->bios_sect = 0;
 469         floppy->blocks = 0;
 470         floppy->bs_factor = 1;
 471         drive->capacity64 = 0;
 472
 473         ide_floppy_create_read_capacity_cmd(&pc);
 474         if (ide_queue_pc_tail(drive, disk, &pc)) {
 475                 printk(KERN_ERR PFX "Can't get floppy parameters\n");
 476                 return 1;
 477         }
 478         header_len = pc.buf[3];
 479         cap_desc = &pc.buf[4];
 480         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 481
 482         for (i = 0; i < desc_cnt; i++) {
 483                 unsigned int desc_start = 4 + i*8;
 484
 485                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 486                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 487
 488                 ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
 489                               "%d sector size\n",
 490                               i, blocks * length / 1024, blocks, length);
 491
 492                 if (i)
 493                         continue;
 494                 /*
 495                  * the code below is valid only for the 1st descriptor, ie i=0
 496                  */
 497
 498                 switch (pc.buf[desc_start + 4] & 0x03) {
 499                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 500                 case CAPACITY_UNFORMATTED:
 501                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 502                                 /*
 503                                  * If it is not a clik drive, break out
 504                                  * (maintains previous driver behaviour)
 505                                  */
 506                                 break;
 507                 case CAPACITY_CURRENT:
 508                         /* Normal Zip/LS-120 disks */
 509                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 510                                 printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
 511                                        "sector size\n",
 512                                        drive->name, blocks * length / 1024,
 513                                        blocks, length);
 514                         memcpy(&floppy->cap_desc, cap_desc, 8);
 515
 516                         if (!length || length % 512) {
 517                                 printk(KERN_NOTICE PFX "%s: %d bytes block size"
 518                                        " not supported\n", drive->name, length);
 519                         } else {
 520                                 floppy->blocks = blocks;
 521                                 floppy->block_size = length;
 522                                 floppy->bs_factor = length / 512;
 523                                 if (floppy->bs_factor != 1)
 524                                         printk(KERN_NOTICE PFX "%s: Warning: "
 525                                                "non 512 bytes block size not "
 526                                                "fully supported\n",
 527                                                drive->name);
 528                                 drive->capacity64 =
 529                                         floppy->blocks * floppy->bs_factor;
 530                                 rc = 0;
 531                         }
 532                         break;
 533                 case CAPACITY_NO_CARTRIDGE:
 534                         /*
 535                          * This is a KERN_ERR so it appears on screen
 536                          * for the user to see
 537                          */
 538                         printk(KERN_ERR PFX "%s: No disk in drive\n",
 539                                drive->name);
 540                         break;
 541                 case CAPACITY_INVALID:
 542                         printk(KERN_ERR PFX "%s: Invalid capacity for disk "
 543                                 "in drive\n", drive->name);
 544                         break;
 545                 }
 546                 ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d\n",
 547                               pc.buf[desc_start + 4] & 0x03);
 548         }
 549
 550         /* Clik! disk does not support get_flexible_disk_page */
 551         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 552                 (void) ide_floppy_get_flexible_disk_page(drive);
 553
 554         return rc;
 555 }
 556
 557 sector_t ide_floppy_capacity(ide_drive_t *drive)
 558 {
 559         return drive->capacity64;
 560 }
 561
 562 static void idefloppy_setup(ide_drive_t *drive)
 563 {
 564         struct ide_floppy_obj *floppy = drive->driver_data;
 565         u16 *id = drive->id;
 566
 567         drive->pc_callback       = ide_floppy_callback;
 568         drive->pc_update_buffers = idefloppy_update_buffers;
 569         drive->pc_io_buffers     = ide_io_buffers;
 570
 571         /*
 572          * We used to check revisions here. At this point however I'm giving up.
 573          * Just assume they are all broken, its easier.
 574          *
 575          * The actual reason for the workarounds was likely a driver bug after
 576          * all rather than a firmware bug, and the workaround below used to hide
 577          * it. It should be fixed as of version 1.9, but to be on the safe side
 578          * we'll leave the limitation below for the 2.2.x tree.
 579          */
 580         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
 581                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
 582                 /* This value will be visible in the /proc/ide/hdx/settings */
 583                 drive->pc_delay = IDEFLOPPY_PC_DELAY;
 584                 blk_queue_max_sectors(drive->queue, 64);
 585         }
 586
 587         /*
 588          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
 589          * nasty clicking noises without it, so please don't remove this.
 590          */
 591         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
 592                 blk_queue_max_sectors(drive->queue, 64);
 593                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
 594                 /* IOMEGA Clik! drives do not support lock/unlock commands */
 595                 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
 596         }
 597
 598         (void) ide_floppy_get_capacity(drive);
 599
 600         ide_proc_register_driver(drive, floppy->driver);
 601
 602         drive->dev_flags |= IDE_DFLAG_ATTACH;
 603 }
 604
 605 static void ide_floppy_remove(ide_drive_t *drive)
 606 {
 607         idefloppy_floppy_t *floppy = drive->driver_data;
 608         struct gendisk *g = floppy->disk;
 609
 610         ide_proc_unregister_driver(drive, floppy->driver);
 611
 612         del_gendisk(g);
 613
 614         ide_floppy_put(floppy);
 615 }
 616
 617 static void idefloppy_cleanup_obj(struct kref *kref)
 618 {
 619         struct ide_floppy_obj *floppy = to_ide_drv(kref, ide_floppy_obj);
 620         ide_drive_t *drive = floppy->drive;
 621         struct gendisk *g = floppy->disk;
 622
 623         drive->driver_data = NULL;
 624         g->private_data = NULL;
 625         put_disk(g);
 626         kfree(floppy);
 627 }
 628
 629 static int ide_floppy_probe(ide_drive_t *);
 630
 631 static ide_driver_t idefloppy_driver = {
 632         .gen_driver = {
 633                 .owner          = THIS_MODULE,
 634                 .name           = "ide-floppy",
 635                 .bus            = &ide_bus_type,
 636         },
 637         .probe                  = ide_floppy_probe,
 638         .remove                 = ide_floppy_remove,
 639         .version                = IDEFLOPPY_VERSION,
 640         .do_request             = idefloppy_do_request,
 641         .end_request            = idefloppy_end_request,
 642         .error                  = __ide_error,
 643 #ifdef CONFIG_IDE_PROC_FS
 644         .proc                   = ide_floppy_proc,
 645         .settings               = ide_floppy_settings,
 646 #endif
 647 };
 648
 649 static int idefloppy_open(struct inode *inode, struct file *filp)
 650 {
 651         struct gendisk *disk = inode->i_bdev->bd_disk;
 652         struct ide_floppy_obj *floppy;
 653         ide_drive_t *drive;
 654         int ret = 0;
 655
 656         floppy = ide_floppy_get(disk);
 657         if (!floppy)
 658                 return -ENXIO;
 659
 660         drive = floppy->drive;
 661
 662         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 663
 664         floppy->openers++;
 665
 666         if (floppy->openers == 1) {
 667                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
 668                 /* Just in case */
 669
 670                 if (ide_do_test_unit_ready(drive, disk))
 671                         ide_do_start_stop(drive, disk, 1);
 672
 673                 ret = ide_floppy_get_capacity(drive);
 674
 675                 set_capacity(disk, ide_floppy_capacity(drive));
 676
 677                 if (ret && (filp->f_flags & O_NDELAY) == 0) {
 678                     /*
 679                      * Allow O_NDELAY to open a drive without a disk, or with an
 680                      * unreadable disk, so that we can get the format capacity
 681                      * of the drive or begin the format - Sam
 682                      */
 683                         ret = -EIO;
 684                         goto out_put_floppy;
 685                 }
 686
 687                 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
 688                         ret = -EROFS;
 689                         goto out_put_floppy;
 690                 }
 691
 692                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
 693                 ide_set_media_lock(drive, disk, 1);
 694                 check_disk_change(inode->i_bdev);
 695         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
 696                 ret = -EBUSY;
 697                 goto out_put_floppy;
 698         }
 699         return 0;
 700
 701 out_put_floppy:
 702         floppy->openers--;
 703         ide_floppy_put(floppy);
 704         return ret;
 705 }
 706
 707 static int idefloppy_release(struct inode *inode, struct file *filp)
 708 {
 709         struct gendisk *disk = inode->i_bdev->bd_disk;
 710         struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
 711         ide_drive_t *drive = floppy->drive;
 712
 713         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 714
 715         if (floppy->openers == 1) {
 716                 ide_set_media_lock(drive, disk, 0);
 717                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
 718         }
 719
 720         floppy->openers--;
 721
 722         ide_floppy_put(floppy);
 723
 724         return 0;
 725 }
 726
 727 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 728 {
 729         struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
 730                                                      ide_floppy_obj);
 731         ide_drive_t *drive = floppy->drive;
 732
 733         geo->heads = drive->bios_head;
 734         geo->sectors = drive->bios_sect;
 735         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
 736         return 0;
 737 }
 738
 739 static int idefloppy_media_changed(struct gendisk *disk)
 740 {
 741         struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
 742         ide_drive_t *drive = floppy->drive;
 743         int ret;
 744
 745         /* do not scan partitions twice if this is a removable device */
 746         if (drive->dev_flags & IDE_DFLAG_ATTACH) {
 747                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
 748                 return 0;
 749         }
 750         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
 751         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
 752         return ret;
 753 }
 754
 755 static int idefloppy_revalidate_disk(struct gendisk *disk)
 756 {
 757         struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
 758         set_capacity(disk, ide_floppy_capacity(floppy->drive));
 759         return 0;
 760 }
 761
 762 static struct block_device_operations idefloppy_ops = {
 763         .owner                  = THIS_MODULE,
 764         .open                   = idefloppy_open,
 765         .release                = idefloppy_release,
 766         .ioctl                  = ide_floppy_ioctl,
 767         .getgeo                 = idefloppy_getgeo,
 768         .media_changed          = idefloppy_media_changed,
 769         .revalidate_disk        = idefloppy_revalidate_disk
 770 };
 771
 772 static int ide_floppy_probe(ide_drive_t *drive)
 773 {
 774         idefloppy_floppy_t *floppy;
 775         struct gendisk *g;
 776
 777         if (!strstr("ide-floppy", drive->driver_req))
 778                 goto failed;
 779
 780         if (drive->media != ide_floppy)
 781                 goto failed;
 782
 783         if (!ide_check_atapi_device(drive, DRV_NAME)) {
 784                 printk(KERN_ERR PFX "%s: not supported by this version of "
 785                        DRV_NAME "\n", drive->name);
 786                 goto failed;
 787         }
 788         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
 789         if (!floppy) {
 790                 printk(KERN_ERR PFX "%s: Can't allocate a floppy structure\n",
 791                        drive->name);
 792                 goto failed;
 793         }
 794
 795         g = alloc_disk_node(1 << PARTN_BITS, hwif_to_node(drive->hwif));
 796         if (!g)
 797                 goto out_free_floppy;
 798
 799         ide_init_disk(g, drive);
 800
 801         kref_init(&floppy->kref);
 802
 803         floppy->drive = drive;
 804         floppy->driver = &idefloppy_driver;
 805         floppy->disk = g;
 806
 807         g->private_data = &floppy->driver;
 808
 809         drive->driver_data = floppy;
 810
 811         drive->debug_mask = debug_mask;
 812
 813         idefloppy_setup(drive);
 814
 815         set_capacity(g, ide_floppy_capacity(drive));
 816
 817         g->minors = 1 << PARTN_BITS;
 818         g->driverfs_dev = &drive->gendev;
 819         if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
 820                 g->flags = GENHD_FL_REMOVABLE;
 821         g->fops = &idefloppy_ops;
 822         add_disk(g);
 823         return 0;
 824
 825 out_free_floppy:
 826         kfree(floppy);
 827 failed:
 828         return -ENODEV;
 829 }
 830
 831 static void __exit idefloppy_exit(void)
 832 {
 833         driver_unregister(&idefloppy_driver.gen_driver);
 834 }
 835
 836 static int __init idefloppy_init(void)
 837 {
 838         printk(KERN_INFO DRV_NAME " driver " IDEFLOPPY_VERSION "\n");
 839         return driver_register(&idefloppy_driver.gen_driver);
 840 }
 841
 842 MODULE_ALIAS("ide:*m-floppy*");
 843 MODULE_ALIAS("ide-floppy");
 844 module_init(idefloppy_init);
 845 module_exit(idefloppy_exit);
 846 MODULE_LICENSE("GPL");
 847 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
 848