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 /*
  73  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  74  * bytes.
  75  */
  76 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  77
  78 /* format capacities descriptor codes */
  79 #define CAPACITY_INVALID        0x00
  80 #define CAPACITY_UNFORMATTED    0x01
  81 #define CAPACITY_CURRENT        0x02
  82 #define CAPACITY_NO_CARTRIDGE   0x03
  83
  84 /*
  85  * Most of our global data which we need to save even as we leave the driver
  86  * due to an interrupt or a timer event is stored in a variable of type
  87  * idefloppy_floppy_t, defined below.
  88  */
  89 typedef struct ide_floppy_obj {
  90         ide_drive_t     *drive;
  91         ide_driver_t    *driver;
  92         struct gendisk  *disk;
  93         struct kref     kref;
  94         unsigned int    openers;        /* protected by BKL for now */
  95
  96         /* Current packet command */
  97         struct ide_atapi_pc *pc;
  98         /* Last failed packet command */
  99         struct ide_atapi_pc *failed_pc;
 100         /* used for blk_{fs,pc}_request() requests */
 101         struct ide_atapi_pc queued_pc;
 102
 103         struct ide_atapi_pc request_sense_pc;
 104         struct request request_sense_rq;
 105
 106         /* Last error information */
 107         u8 sense_key, asc, ascq;
 108         /* delay this long before sending packet command */
 109         u8 ticks;
 110         int progress_indication;
 111
 112         /* Device information */
 113         /* Current format */
 114         int blocks, block_size, bs_factor;
 115         /* Last format capacity descriptor */
 116         u8 cap_desc[8];
 117         /* Copy of the flexible disk page */
 118         u8 flexible_disk_page[32];
 119         /* Write protect */
 120         int wp;
 121         /* Supports format progress report */
 122         int srfp;
 123 } idefloppy_floppy_t;
 124
 125 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 126
 127 /* Defines for the MODE SENSE command */
 128 #define MODE_SENSE_CURRENT              0x00
 129 #define MODE_SENSE_CHANGEABLE           0x01
 130 #define MODE_SENSE_DEFAULT              0x02
 131 #define MODE_SENSE_SAVED                0x03
 132
 133 /* IOCTLs used in low-level formatting. */
 134 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 135 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 136 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 137 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 138
 139 /* Error code returned in rq->errors to the higher part of the driver. */
 140 #define IDEFLOPPY_ERROR_GENERAL         101
 141
 142 /*
 143  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 144  * See SFF-8070i spec.
 145  */
 146 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 147 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 148
 149 static DEFINE_MUTEX(idefloppy_ref_mutex);
 150
 151 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 152
 153 #define ide_floppy_g(disk) \
 154         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 155
 156 static void idefloppy_cleanup_obj(struct kref *);
 157
 158 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 159 {
 160         struct ide_floppy_obj *floppy = NULL;
 161
 162         mutex_lock(&idefloppy_ref_mutex);
 163         floppy = ide_floppy_g(disk);
 164         if (floppy) {
 165                 if (ide_device_get(floppy->drive))
 166                         floppy = NULL;
 167                 else
 168                         kref_get(&floppy->kref);
 169         }
 170         mutex_unlock(&idefloppy_ref_mutex);
 171         return floppy;
 172 }
 173
 174 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 175 {
 176         ide_drive_t *drive = floppy->drive;
 177
 178         mutex_lock(&idefloppy_ref_mutex);
 179         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 180         ide_device_put(drive);
 181         mutex_unlock(&idefloppy_ref_mutex);
 182 }
 183
 184 /*
 185  * Used to finish servicing a request. For read/write requests, we will call
 186  * ide_end_request to pass to the next buffer.
 187  */
 188 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 189 {
 190         idefloppy_floppy_t *floppy = drive->driver_data;
 191         struct request *rq = HWGROUP(drive)->rq;
 192         int error;
 193
 194         debug_log("Reached %s\n", __func__);
 195
 196         switch (uptodate) {
 197         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 198         case 1: error = 0; break;
 199         default: error = uptodate;
 200         }
 201         if (error)
 202                 floppy->failed_pc = NULL;
 203         /* Why does this happen? */
 204         if (!rq)
 205                 return 0;
 206         if (!blk_special_request(rq)) {
 207                 /* our real local end request function */
 208                 ide_end_request(drive, uptodate, nsecs);
 209                 return 0;
 210         }
 211         rq->errors = error;
 212         /* fixme: need to move this local also */
 213         ide_end_drive_cmd(drive, 0, 0);
 214         return 0;
 215 }
 216
 217 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 218                                   unsigned int bcount, int direction)
 219 {
 220         ide_hwif_t *hwif = drive->hwif;
 221         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
 222         xfer_func_t *xf = direction ? tp_ops->output_data : tp_ops->input_data;
 223         struct scatterlist *sg = pc->sg;
 224         char *buf;
 225         int count, done = 0;
 226
 227         while (bcount) {
 228                 count = min(sg->length - pc->b_count, bcount);
 229                 if (PageHighMem(sg_page(sg))) {
 230                         unsigned long flags;
 231
 232                         local_irq_save(flags);
 233                         buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
 234                         xf(drive, NULL, buf + pc->b_count, count);
 235                         kunmap_atomic(buf - sg->offset, KM_IRQ0);
 236                         local_irq_restore(flags);
 237                 } else {
 238                         buf = sg_virt(sg);
 239                         xf(drive, NULL, buf + pc->b_count, count);
 240                 }
 241                 bcount -= count;
 242                 pc->b_count += count;
 243                 done += count;
 244
 245                 if (pc->b_count == sg->length) {
 246                         if (!--pc->sg_cnt)
 247                                 break;
 248                         pc->sg = sg = sg_next(sg);
 249                         pc->b_count = 0;
 250                 }
 251         }
 252
 253         idefloppy_end_request(drive, 1, done >> 9);
 254
 255         if (bcount) {
 256                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 257                                 drive->name, __func__, bcount);
 258                 ide_pad_transfer(drive, direction, bcount);
 259         }
 260 }
 261
 262 static void idefloppy_update_buffers(ide_drive_t *drive,
 263                                 struct ide_atapi_pc *pc)
 264 {
 265         struct request *rq = pc->rq;
 266         struct bio *bio = rq->bio;
 267
 268         while ((bio = rq->bio) != NULL)
 269                 idefloppy_end_request(drive, 1, 0);
 270 }
 271
 272 /*
 273  * Generate a new packet command request in front of the request queue, before
 274  * the current request so that it will be processed immediately, on the next
 275  * pass through the driver.
 276  */
 277 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 278                 struct request *rq)
 279 {
 280         struct ide_floppy_obj *floppy = drive->driver_data;
 281
 282         blk_rq_init(NULL, rq);
 283         rq->buffer = (char *) pc;
 284         rq->cmd_type = REQ_TYPE_SPECIAL;
 285         rq->cmd_flags |= REQ_PREEMPT;
 286         rq->rq_disk = floppy->disk;
 287         memcpy(rq->cmd, pc->c, 12);
 288         ide_do_drive_cmd(drive, rq);
 289 }
 290
 291 static void ide_floppy_callback(ide_drive_t *drive)
 292 {
 293         idefloppy_floppy_t *floppy = drive->driver_data;
 294         struct ide_atapi_pc *pc = floppy->pc;
 295         int uptodate = pc->error ? 0 : 1;
 296
 297         debug_log("Reached %s\n", __func__);
 298
 299         if (floppy->failed_pc == pc)
 300                 floppy->failed_pc = NULL;
 301
 302         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 303             (pc->rq && blk_pc_request(pc->rq)))
 304                 uptodate = 1; /* FIXME */
 305         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 306                 u8 *buf = floppy->pc->buf;
 307
 308                 if (!pc->error) {
 309                         floppy->sense_key = buf[2] & 0x0F;
 310                         floppy->asc = buf[12];
 311                         floppy->ascq = buf[13];
 312                         floppy->progress_indication = buf[15] & 0x80 ?
 313                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 314
 315                         if (floppy->failed_pc)
 316                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 317
 318                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 319                                   floppy->sense_key, floppy->asc, floppy->ascq);
 320                 } else
 321                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 322                                         "Aborting request!\n");
 323         }
 324
 325         idefloppy_end_request(drive, uptodate, 0);
 326 }
 327
 328 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 329 {
 330         memset(pc, 0, sizeof(*pc));
 331         pc->buf = pc->pc_buf;
 332         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 333 }
 334
 335 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 336 {
 337         idefloppy_init_pc(pc);
 338         pc->c[0] = GPCMD_REQUEST_SENSE;
 339         pc->c[4] = 255;
 340         pc->req_xfer = 18;
 341 }
 342
 343 /*
 344  * Called when an error was detected during the last packet command. We queue a
 345  * request sense packet command in the head of the request list.
 346  */
 347 static void idefloppy_retry_pc(ide_drive_t *drive)
 348 {
 349         struct ide_floppy_obj *floppy = drive->driver_data;
 350         struct request *rq = &floppy->request_sense_rq;
 351         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
 352
 353         (void)ide_read_error(drive);
 354         idefloppy_create_request_sense_cmd(pc);
 355         idefloppy_queue_pc_head(drive, pc, rq);
 356 }
 357
 358 /* The usual interrupt handler called during a packet command. */
 359 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 360 {
 361         idefloppy_floppy_t *floppy = drive->driver_data;
 362
 363         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 364                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 365                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 366 }
 367
 368 /*
 369  * What we have here is a classic case of a top half / bottom half interrupt
 370  * service routine. In interrupt mode, the device sends an interrupt to signal
 371  * that it is ready to receive a packet. However, we need to delay about 2-3
 372  * ticks before issuing the packet or we gets in trouble.
 373  */
 374 static int idefloppy_transfer_pc(ide_drive_t *drive)
 375 {
 376         idefloppy_floppy_t *floppy = drive->driver_data;
 377
 378         /* Send the actual packet */
 379         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 380
 381         /* Timeout for the packet command */
 382         return IDEFLOPPY_WAIT_CMD;
 383 }
 384
 385
 386 /*
 387  * Called as an interrupt (or directly). When the device says it's ready for a
 388  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 389  * transfer_pc.
 390  */
 391 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 392 {
 393         idefloppy_floppy_t *floppy = drive->driver_data;
 394         struct ide_atapi_pc *pc = floppy->pc;
 395         ide_expiry_t *expiry;
 396         unsigned int timeout;
 397
 398         /*
 399          * The following delay solves a problem with ATAPI Zip 100 drives
 400          * where the Busy flag was apparently being deasserted before the
 401          * unit was ready to receive data. This was happening on a
 402          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 403          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 404          * used until after the packet is moved in about 50 msec.
 405          */
 406         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 407                 timeout = floppy->ticks;
 408                 expiry = &idefloppy_transfer_pc;
 409         } else {
 410                 timeout = IDEFLOPPY_WAIT_CMD;
 411                 expiry = NULL;
 412         }
 413
 414         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 415 }
 416
 417 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 418                                     struct ide_atapi_pc *pc)
 419 {
 420         /* supress error messages resulting from Medium not present */
 421         if (floppy->sense_key == 0x02 &&
 422             floppy->asc       == 0x3a &&
 423             floppy->ascq      == 0x00)
 424                 return;
 425
 426         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 427                         "asc = %2x, ascq = %2x\n",
 428                         floppy->drive->name, pc->c[0], floppy->sense_key,
 429                         floppy->asc, floppy->ascq);
 430
 431 }
 432
 433 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 434                 struct ide_atapi_pc *pc)
 435 {
 436         idefloppy_floppy_t *floppy = drive->driver_data;
 437
 438         if (floppy->failed_pc == NULL &&
 439             pc->c[0] != GPCMD_REQUEST_SENSE)
 440                 floppy->failed_pc = pc;
 441         /* Set the current packet command */
 442         floppy->pc = pc;
 443
 444         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 445                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 446                         ide_floppy_report_error(floppy, pc);
 447                 /* Giving up */
 448                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 449
 450                 floppy->failed_pc = NULL;
 451                 drive->pc_callback(drive);
 452                 return ide_stopped;
 453         }
 454
 455         debug_log("Retry number - %d\n", pc->retries);
 456
 457         pc->retries++;
 458
 459         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 460                             IDEFLOPPY_WAIT_CMD, NULL);
 461 }
 462
 463 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 464 {
 465         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 466
 467         idefloppy_init_pc(pc);
 468         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 469         pc->c[4] = prevent;
 470 }
 471
 472 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 473 {
 474         idefloppy_init_pc(pc);
 475         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 476         pc->c[7] = 255;
 477         pc->c[8] = 255;
 478         pc->req_xfer = 255;
 479 }
 480
 481 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 482                 int l, int flags)
 483 {
 484         idefloppy_init_pc(pc);
 485         pc->c[0] = GPCMD_FORMAT_UNIT;
 486         pc->c[1] = 0x17;
 487
 488         memset(pc->buf, 0, 12);
 489         pc->buf[1] = 0xA2;
 490         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 491
 492         if (flags & 1)                          /* Verify bit on... */
 493                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 494         pc->buf[3] = 8;
 495
 496         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 497         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 498         pc->buf_size = 12;
 499         pc->flags |= PC_FLAG_WRITING;
 500 }
 501
 502 /* A mode sense command is used to "sense" floppy parameters. */
 503 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 504                 u8 page_code, u8 type)
 505 {
 506         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 507
 508         idefloppy_init_pc(pc);
 509         pc->c[0] = GPCMD_MODE_SENSE_10;
 510         pc->c[1] = 0;
 511         pc->c[2] = page_code + (type << 6);
 512
 513         switch (page_code) {
 514         case IDEFLOPPY_CAPABILITIES_PAGE:
 515                 length += 12;
 516                 break;
 517         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 518                 length += 32;
 519                 break;
 520         default:
 521                 printk(KERN_ERR "ide-floppy: unsupported page code "
 522                                 "in create_mode_sense_cmd\n");
 523         }
 524         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 525         pc->req_xfer = length;
 526 }
 527
 528 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 529 {
 530         idefloppy_init_pc(pc);
 531         pc->c[0] = GPCMD_START_STOP_UNIT;
 532         pc->c[4] = start;
 533 }
 534
 535 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 536                                     struct ide_atapi_pc *pc, struct request *rq,
 537                                     unsigned long sector)
 538 {
 539         int block = sector / floppy->bs_factor;
 540         int blocks = rq->nr_sectors / floppy->bs_factor;
 541         int cmd = rq_data_dir(rq);
 542
 543         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 544                 block, blocks);
 545
 546         idefloppy_init_pc(pc);
 547         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 548         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 549         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 550
 551         memcpy(rq->cmd, pc->c, 12);
 552
 553         pc->rq = rq;
 554         pc->b_count = 0;
 555         if (rq->cmd_flags & REQ_RW)
 556                 pc->flags |= PC_FLAG_WRITING;
 557         pc->buf = NULL;
 558         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 559         pc->flags |= PC_FLAG_DMA_OK;
 560 }
 561
 562 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 563                 struct ide_atapi_pc *pc, struct request *rq)
 564 {
 565         idefloppy_init_pc(pc);
 566         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 567         pc->rq = rq;
 568         pc->b_count = 0;
 569         if (rq->data_len && rq_data_dir(rq) == WRITE)
 570                 pc->flags |= PC_FLAG_WRITING;
 571         pc->buf = rq->data;
 572         if (rq->bio)
 573                 pc->flags |= PC_FLAG_DMA_OK;
 574         /*
 575          * possibly problematic, doesn't look like ide-floppy correctly
 576          * handled scattered requests if dma fails...
 577          */
 578         pc->req_xfer = pc->buf_size = rq->data_len;
 579 }
 580
 581 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 582                 struct request *rq, sector_t block_s)
 583 {
 584         idefloppy_floppy_t *floppy = drive->driver_data;
 585         ide_hwif_t *hwif = drive->hwif;
 586         struct ide_atapi_pc *pc;
 587         unsigned long block = (unsigned long)block_s;
 588
 589         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 590                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 591                   rq->cmd[0], rq->cmd_type, rq->errors);
 592
 593         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 594                   __func__, (long)rq->sector, rq->nr_sectors,
 595                   rq->current_nr_sectors);
 596
 597         if (rq->errors >= ERROR_MAX) {
 598                 if (floppy->failed_pc)
 599                         ide_floppy_report_error(floppy, floppy->failed_pc);
 600                 else
 601                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 602                                 drive->name);
 603                 idefloppy_end_request(drive, 0, 0);
 604                 return ide_stopped;
 605         }
 606         if (blk_fs_request(rq)) {
 607                 if (((long)rq->sector % floppy->bs_factor) ||
 608                     (rq->nr_sectors % floppy->bs_factor)) {
 609                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 610                                         drive->name);
 611                         idefloppy_end_request(drive, 0, 0);
 612                         return ide_stopped;
 613                 }
 614                 pc = &floppy->queued_pc;
 615                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 616         } else if (blk_special_request(rq)) {
 617                 pc = (struct ide_atapi_pc *) rq->buffer;
 618         } else if (blk_pc_request(rq)) {
 619                 pc = &floppy->queued_pc;
 620                 idefloppy_blockpc_cmd(floppy, pc, rq);
 621         } else {
 622                 blk_dump_rq_flags(rq,
 623                         "ide-floppy: unsupported command in queue");
 624                 idefloppy_end_request(drive, 0, 0);
 625                 return ide_stopped;
 626         }
 627
 628         ide_init_sg_cmd(drive, rq);
 629         ide_map_sg(drive, rq);
 630
 631         pc->sg = hwif->sg_table;
 632         pc->sg_cnt = hwif->sg_nents;
 633
 634         pc->rq = rq;
 635
 636         return idefloppy_issue_pc(drive, pc);
 637 }
 638
 639 /*
 640  * Add a special packet command request to the tail of the request queue,
 641  * and wait for it to be serviced.
 642  */
 643 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 644 {
 645         struct ide_floppy_obj *floppy = drive->driver_data;
 646         struct request *rq;
 647         int error;
 648
 649         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 650         rq->buffer = (char *) pc;
 651         rq->cmd_type = REQ_TYPE_SPECIAL;
 652         memcpy(rq->cmd, pc->c, 12);
 653         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 654         blk_put_request(rq);
 655
 656         return error;
 657 }
 658
 659 /*
 660  * Look at the flexible disk page parameters. We ignore the CHS capacity
 661  * parameters and use the LBA parameters instead.
 662  */
 663 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 664 {
 665         idefloppy_floppy_t *floppy = drive->driver_data;
 666         struct ide_atapi_pc pc;
 667         u8 *page;
 668         int capacity, lba_capacity;
 669         u16 transfer_rate, sector_size, cyls, rpm;
 670         u8 heads, sectors;
 671
 672         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 673                                         MODE_SENSE_CURRENT);
 674
 675         if (idefloppy_queue_pc_tail(drive, &pc)) {
 676                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 677                                 " parameters\n");
 678                 return 1;
 679         }
 680         floppy->wp = !!(pc.buf[3] & 0x80);
 681         set_disk_ro(floppy->disk, floppy->wp);
 682         page = &pc.buf[8];
 683
 684         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 685         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 686         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 687         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 688         heads         = pc.buf[8 + 4];
 689         sectors       = pc.buf[8 + 5];
 690
 691         capacity = cyls * heads * sectors * sector_size;
 692
 693         if (memcmp(page, &floppy->flexible_disk_page, 32))
 694                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 695                                 "%d sector size, %d rpm\n",
 696                                 drive->name, capacity / 1024, cyls, heads,
 697                                 sectors, transfer_rate / 8, sector_size, rpm);
 698
 699         memcpy(&floppy->flexible_disk_page, page, 32);
 700         drive->bios_cyl = cyls;
 701         drive->bios_head = heads;
 702         drive->bios_sect = sectors;
 703         lba_capacity = floppy->blocks * floppy->block_size;
 704
 705         if (capacity < lba_capacity) {
 706                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 707                         "bytes, but the drive only handles %d\n",
 708                         drive->name, lba_capacity, capacity);
 709                 floppy->blocks = floppy->block_size ?
 710                         capacity / floppy->block_size : 0;
 711         }
 712         return 0;
 713 }
 714
 715 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 716 {
 717         idefloppy_floppy_t *floppy = drive->driver_data;
 718         struct ide_atapi_pc pc;
 719
 720         floppy->srfp = 0;
 721         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 722                                                  MODE_SENSE_CURRENT);
 723
 724         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 725         if (idefloppy_queue_pc_tail(drive, &pc))
 726                 return 1;
 727
 728         floppy->srfp = pc.buf[8 + 2] & 0x40;
 729         return 0;
 730 }
 731
 732 /*
 733  * Determine if a media is present in the floppy drive, and if so, its LBA
 734  * capacity.
 735  */
 736 static int ide_floppy_get_capacity(ide_drive_t *drive)
 737 {
 738         idefloppy_floppy_t *floppy = drive->driver_data;
 739         struct ide_atapi_pc pc;
 740         u8 *cap_desc;
 741         u8 header_len, desc_cnt;
 742         int i, rc = 1, blocks, length;
 743
 744         drive->bios_cyl = 0;
 745         drive->bios_head = drive->bios_sect = 0;
 746         floppy->blocks = 0;
 747         floppy->bs_factor = 1;
 748         set_capacity(floppy->disk, 0);
 749
 750         idefloppy_create_read_capacity_cmd(&pc);
 751         if (idefloppy_queue_pc_tail(drive, &pc)) {
 752                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 753                 return 1;
 754         }
 755         header_len = pc.buf[3];
 756         cap_desc = &pc.buf[4];
 757         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 758
 759         for (i = 0; i < desc_cnt; i++) {
 760                 unsigned int desc_start = 4 + i*8;
 761
 762                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 763                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 764
 765                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 766                                 i, blocks * length / 1024, blocks, length);
 767
 768                 if (i)
 769                         continue;
 770                 /*
 771                  * the code below is valid only for the 1st descriptor, ie i=0
 772                  */
 773
 774                 switch (pc.buf[desc_start + 4] & 0x03) {
 775                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 776                 case CAPACITY_UNFORMATTED:
 777                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 778                                 /*
 779                                  * If it is not a clik drive, break out
 780                                  * (maintains previous driver behaviour)
 781                                  */
 782                                 break;
 783                 case CAPACITY_CURRENT:
 784                         /* Normal Zip/LS-120 disks */
 785                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 786                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 787                                         "sector size\n", drive->name,
 788                                         blocks * length / 1024, blocks, length);
 789                         memcpy(&floppy->cap_desc, cap_desc, 8);
 790
 791                         if (!length || length % 512) {
 792                                 printk(KERN_NOTICE "%s: %d bytes block size "
 793                                         "not supported\n", drive->name, length);
 794                         } else {
 795                                 floppy->blocks = blocks;
 796                                 floppy->block_size = length;
 797                                 floppy->bs_factor = length / 512;
 798                                 if (floppy->bs_factor != 1)
 799                                         printk(KERN_NOTICE "%s: warning: non "
 800                                                 "512 bytes block size not "
 801                                                 "fully supported\n",
 802                                                 drive->name);
 803                                 rc = 0;
 804                         }
 805                         break;
 806                 case CAPACITY_NO_CARTRIDGE:
 807                         /*
 808                          * This is a KERN_ERR so it appears on screen
 809                          * for the user to see
 810                          */
 811                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 812                         break;
 813                 case CAPACITY_INVALID:
 814                         printk(KERN_ERR "%s: Invalid capacity for disk "
 815                                 "in drive\n", drive->name);
 816                         break;
 817                 }
 818                 debug_log("Descriptor 0 Code: %d\n",
 819                           pc.buf[desc_start + 4] & 0x03);
 820         }
 821
 822         /* Clik! disk does not support get_flexible_disk_page */
 823         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 824                 (void) ide_floppy_get_flexible_disk_page(drive);
 825
 826         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 827         return rc;
 828 }
 829
 830 /*
 831  * Obtain the list of formattable capacities.
 832  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 833  * descriptors to userland, instead of our own structures.
 834  *
 835  * Userland gives us the following structure:
 836  *
 837  * struct idefloppy_format_capacities {
 838  *      int nformats;
 839  *      struct {
 840  *              int nblocks;
 841  *              int blocksize;
 842  *      } formats[];
 843  * };
 844  *
 845  * userland initializes nformats to the number of allocated formats[] records.
 846  * On exit we set nformats to the number of records we've actually initialized.
 847  */
 848
 849 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 850 {
 851         struct ide_atapi_pc pc;
 852         u8 header_len, desc_cnt;
 853         int i, blocks, length, u_array_size, u_index;
 854         int __user *argp;
 855
 856         if (get_user(u_array_size, arg))
 857                 return -EFAULT;
 858
 859         if (u_array_size <= 0)
 860                 return -EINVAL;
 861
 862         idefloppy_create_read_capacity_cmd(&pc);
 863         if (idefloppy_queue_pc_tail(drive, &pc)) {
 864                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 865                 return -EIO;
 866         }
 867
 868         header_len = pc.buf[3];
 869         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 870
 871         u_index = 0;
 872         argp = arg + 1;
 873
 874         /*
 875          * We always skip the first capacity descriptor.  That's the current
 876          * capacity.  We are interested in the remaining descriptors, the
 877          * formattable capacities.
 878          */
 879         for (i = 1; i < desc_cnt; i++) {
 880                 unsigned int desc_start = 4 + i*8;
 881
 882                 if (u_index >= u_array_size)
 883                         break;  /* User-supplied buffer too small */
 884
 885                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 886                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 887
 888                 if (put_user(blocks, argp))
 889                         return -EFAULT;
 890
 891                 ++argp;
 892
 893                 if (put_user(length, argp))
 894                         return -EFAULT;
 895
 896                 ++argp;
 897
 898                 ++u_index;
 899         }
 900
 901         if (put_user(u_index, arg))
 902                 return -EFAULT;
 903
 904         return 0;
 905 }
 906
 907 /*
 908  * Get ATAPI_FORMAT_UNIT progress indication.
 909  *
 910  * Userland gives a pointer to an int.  The int is set to a progress
 911  * indicator 0-65536, with 65536=100%.
 912  *
 913  * If the drive does not support format progress indication, we just check
 914  * the dsc bit, and return either 0 or 65536.
 915  */
 916
 917 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 918 {
 919         idefloppy_floppy_t *floppy = drive->driver_data;
 920         struct ide_atapi_pc pc;
 921         int progress_indication = 0x10000;
 922
 923         if (floppy->srfp) {
 924                 idefloppy_create_request_sense_cmd(&pc);
 925                 if (idefloppy_queue_pc_tail(drive, &pc))
 926                         return -EIO;
 927
 928                 if (floppy->sense_key == 2 &&
 929                     floppy->asc == 4 &&
 930                     floppy->ascq == 4)
 931                         progress_indication = floppy->progress_indication;
 932
 933                 /* Else assume format_unit has finished, and we're at 0x10000 */
 934         } else {
 935                 ide_hwif_t *hwif = drive->hwif;
 936                 unsigned long flags;
 937                 u8 stat;
 938
 939                 local_irq_save(flags);
 940                 stat = hwif->tp_ops->read_status(hwif);
 941                 local_irq_restore(flags);
 942
 943                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 944         }
 945
 946         if (put_user(progress_indication, arg))
 947                 return -EFAULT;
 948
 949         return 0;
 950 }
 951
 952 static sector_t idefloppy_capacity(ide_drive_t *drive)
 953 {
 954         idefloppy_floppy_t *floppy = drive->driver_data;
 955         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 956
 957         return capacity;
 958 }
 959
 960 #ifdef CONFIG_IDE_PROC_FS
 961 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 962 ide_devset_rw(bios_head, 0,  255, bios_head);
 963 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 964
 965 static int get_ticks(ide_drive_t *drive)
 966 {
 967         idefloppy_floppy_t *floppy = drive->driver_data;
 968         return floppy->ticks;
 969 }
 970
 971 static int set_ticks(ide_drive_t *drive, int arg)
 972 {
 973         idefloppy_floppy_t *floppy = drive->driver_data;
 974         floppy->ticks = arg;
 975         return 0;
 976 }
 977
 978 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
 979
 980 static const struct ide_devset *idefloppy_settings[] = {
 981         &ide_devset_bios_cyl,
 982         &ide_devset_bios_head,
 983         &ide_devset_bios_sect,
 984         &ide_devset_ticks,
 985         NULL
 986 };
 987 #endif
 988
 989 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 990 {
 991         u16 *id = drive->id;
 992         u8 gcw[2];
 993
 994         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 995
 996         drive->pc_callback = ide_floppy_callback;
 997
 998         if (((gcw[0] & 0x60) >> 5) == 1)
 999                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1000         /*
1001          * We used to check revisions here. At this point however I'm giving up.
1002          * Just assume they are all broken, its easier.
1003          *
1004          * The actual reason for the workarounds was likely a driver bug after
1005          * all rather than a firmware bug, and the workaround below used to hide
1006          * it. It should be fixed as of version 1.9, but to be on the safe side
1007          * we'll leave the limitation below for the 2.2.x tree.
1008          */
1009         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
1010                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1011                 /* This value will be visible in the /proc/ide/hdx/settings */
1012                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1013                 blk_queue_max_sectors(drive->queue, 64);
1014         }
1015
1016         /*
1017          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1018          * nasty clicking noises without it, so please don't remove this.
1019          */
1020         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
1021                 blk_queue_max_sectors(drive->queue, 64);
1022                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1023         }
1024
1025         (void) ide_floppy_get_capacity(drive);
1026
1027         ide_proc_register_driver(drive, floppy->driver);
1028 }
1029
1030 static void ide_floppy_remove(ide_drive_t *drive)
1031 {
1032         idefloppy_floppy_t *floppy = drive->driver_data;
1033         struct gendisk *g = floppy->disk;
1034
1035         ide_proc_unregister_driver(drive, floppy->driver);
1036
1037         del_gendisk(g);
1038
1039         ide_floppy_put(floppy);
1040 }
1041
1042 static void idefloppy_cleanup_obj(struct kref *kref)
1043 {
1044         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1045         ide_drive_t *drive = floppy->drive;
1046         struct gendisk *g = floppy->disk;
1047
1048         drive->driver_data = NULL;
1049         g->private_data = NULL;
1050         put_disk(g);
1051         kfree(floppy);
1052 }
1053
1054 #ifdef CONFIG_IDE_PROC_FS
1055 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1056                 int count, int *eof, void *data)
1057 {
1058         ide_drive_t*drive = (ide_drive_t *)data;
1059         int len;
1060
1061         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1062         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1063 }
1064
1065 static ide_proc_entry_t idefloppy_proc[] = {
1066         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1067         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1068         { NULL, 0, NULL, NULL }
1069 };
1070 #endif  /* CONFIG_IDE_PROC_FS */
1071
1072 static int ide_floppy_probe(ide_drive_t *);
1073
1074 static ide_driver_t idefloppy_driver = {
1075         .gen_driver = {
1076                 .owner          = THIS_MODULE,
1077                 .name           = "ide-floppy",
1078                 .bus            = &ide_bus_type,
1079         },
1080         .probe                  = ide_floppy_probe,
1081         .remove                 = ide_floppy_remove,
1082         .version                = IDEFLOPPY_VERSION,
1083         .media                  = ide_floppy,
1084         .do_request             = idefloppy_do_request,
1085         .end_request            = idefloppy_end_request,
1086         .error                  = __ide_error,
1087 #ifdef CONFIG_IDE_PROC_FS
1088         .proc                   = idefloppy_proc,
1089         .settings               = idefloppy_settings,
1090 #endif
1091 };
1092
1093 static int idefloppy_open(struct inode *inode, struct file *filp)
1094 {
1095         struct gendisk *disk = inode->i_bdev->bd_disk;
1096         struct ide_floppy_obj *floppy;
1097         ide_drive_t *drive;
1098         struct ide_atapi_pc pc;
1099         int ret = 0;
1100
1101         debug_log("Reached %s\n", __func__);
1102
1103         floppy = ide_floppy_get(disk);
1104         if (!floppy)
1105                 return -ENXIO;
1106
1107         drive = floppy->drive;
1108
1109         floppy->openers++;
1110
1111         if (floppy->openers == 1) {
1112                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1113                 /* Just in case */
1114
1115                 idefloppy_init_pc(&pc);
1116                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1117
1118                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1119                         idefloppy_create_start_stop_cmd(&pc, 1);
1120                         (void) idefloppy_queue_pc_tail(drive, &pc);
1121                 }
1122
1123                 if (ide_floppy_get_capacity(drive)
1124                    && (filp->f_flags & O_NDELAY) == 0
1125                     /*
1126                      * Allow O_NDELAY to open a drive without a disk, or with an
1127                      * unreadable disk, so that we can get the format capacity
1128                      * of the drive or begin the format - Sam
1129                      */
1130                     ) {
1131                         ret = -EIO;
1132                         goto out_put_floppy;
1133                 }
1134
1135                 if (floppy->wp && (filp->f_mode & 2)) {
1136                         ret = -EROFS;
1137                         goto out_put_floppy;
1138                 }
1139                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1140                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1141                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1142                         idefloppy_create_prevent_cmd(&pc, 1);
1143                         (void) idefloppy_queue_pc_tail(drive, &pc);
1144                 }
1145                 check_disk_change(inode->i_bdev);
1146         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1147                 ret = -EBUSY;
1148                 goto out_put_floppy;
1149         }
1150         return 0;
1151
1152 out_put_floppy:
1153         floppy->openers--;
1154         ide_floppy_put(floppy);
1155         return ret;
1156 }
1157
1158 static int idefloppy_release(struct inode *inode, struct file *filp)
1159 {
1160         struct gendisk *disk = inode->i_bdev->bd_disk;
1161         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1162         ide_drive_t *drive = floppy->drive;
1163         struct ide_atapi_pc pc;
1164
1165         debug_log("Reached %s\n", __func__);
1166
1167         if (floppy->openers == 1) {
1168                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1169                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1170                         idefloppy_create_prevent_cmd(&pc, 0);
1171                         (void) idefloppy_queue_pc_tail(drive, &pc);
1172                 }
1173
1174                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1175         }
1176
1177         floppy->openers--;
1178
1179         ide_floppy_put(floppy);
1180
1181         return 0;
1182 }
1183
1184 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1185 {
1186         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1187         ide_drive_t *drive = floppy->drive;
1188
1189         geo->heads = drive->bios_head;
1190         geo->sectors = drive->bios_sect;
1191         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1192         return 0;
1193 }
1194
1195 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1196                                unsigned long arg, unsigned int cmd)
1197 {
1198         idefloppy_floppy_t *floppy = drive->driver_data;
1199
1200         if (floppy->openers > 1)
1201                 return -EBUSY;
1202
1203         /* The IOMEGA Clik! Drive doesn't support this command -
1204          * no room for an eject mechanism */
1205         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1206                 int prevent = arg ? 1 : 0;
1207
1208                 if (cmd == CDROMEJECT)
1209                         prevent = 0;
1210
1211                 idefloppy_create_prevent_cmd(pc, prevent);
1212                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1213         }
1214
1215         if (cmd == CDROMEJECT) {
1216                 idefloppy_create_start_stop_cmd(pc, 2);
1217                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1218         }
1219
1220         return 0;
1221 }
1222
1223 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1224 {
1225         idefloppy_floppy_t *floppy = drive->driver_data;
1226         struct ide_atapi_pc pc;
1227         int blocks, length, flags, err = 0;
1228
1229         if (floppy->openers > 1) {
1230                 /* Don't format if someone is using the disk */
1231                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1232                 return -EBUSY;
1233         }
1234
1235         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1236
1237         /*
1238          * Send ATAPI_FORMAT_UNIT to the drive.
1239          *
1240          * Userland gives us the following structure:
1241          *
1242          * struct idefloppy_format_command {
1243          *        int nblocks;
1244          *        int blocksize;
1245          *        int flags;
1246          *        } ;
1247          *
1248          * flags is a bitmask, currently, the only defined flag is:
1249          *
1250          *        0x01 - verify media after format.
1251          */
1252         if (get_user(blocks, arg) ||
1253                         get_user(length, arg+1) ||
1254                         get_user(flags, arg+2)) {
1255                 err = -EFAULT;
1256                 goto out;
1257         }
1258
1259         (void) idefloppy_get_sfrp_bit(drive);
1260         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1261
1262         if (idefloppy_queue_pc_tail(drive, &pc))
1263                 err = -EIO;
1264
1265 out:
1266         if (err)
1267                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1268         return err;
1269 }
1270
1271 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1272                                    unsigned int cmd, void __user *argp)
1273 {
1274         switch (cmd) {
1275         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1276                 return 0;
1277         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1278                 return ide_floppy_get_format_capacities(drive, argp);
1279         case IDEFLOPPY_IOCTL_FORMAT_START:
1280                 if (!(file->f_mode & 2))
1281                         return -EPERM;
1282                 return ide_floppy_format_unit(drive, (int __user *)argp);
1283         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1284                 return ide_floppy_get_format_progress(drive, argp);
1285         default:
1286                 return -ENOTTY;
1287         }
1288 }
1289
1290 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1291                         unsigned int cmd, unsigned long arg)
1292 {
1293         struct block_device *bdev = inode->i_bdev;
1294         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1295         ide_drive_t *drive = floppy->drive;
1296         struct ide_atapi_pc pc;
1297         void __user *argp = (void __user *)arg;
1298         int err;
1299
1300         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1301                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1302
1303         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1304         if (err != -ENOTTY)
1305                 return err;
1306
1307         /*
1308          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1309          * and CDROM_SEND_PACKET (legacy) ioctls
1310          */
1311         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1312                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1313                                         bdev->bd_disk, cmd, argp);
1314
1315         if (err == -ENOTTY)
1316                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1317
1318         return err;
1319 }
1320
1321 static int idefloppy_media_changed(struct gendisk *disk)
1322 {
1323         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1324         ide_drive_t *drive = floppy->drive;
1325         int ret;
1326
1327         /* do not scan partitions twice if this is a removable device */
1328         if (drive->attach) {
1329                 drive->attach = 0;
1330                 return 0;
1331         }
1332         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1333         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1334         return ret;
1335 }
1336
1337 static int idefloppy_revalidate_disk(struct gendisk *disk)
1338 {
1339         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1340         set_capacity(disk, idefloppy_capacity(floppy->drive));
1341         return 0;
1342 }
1343
1344 static struct block_device_operations idefloppy_ops = {
1345         .owner                  = THIS_MODULE,
1346         .open                   = idefloppy_open,
1347         .release                = idefloppy_release,
1348         .ioctl                  = idefloppy_ioctl,
1349         .getgeo                 = idefloppy_getgeo,
1350         .media_changed          = idefloppy_media_changed,
1351         .revalidate_disk        = idefloppy_revalidate_disk
1352 };
1353
1354 static int ide_floppy_probe(ide_drive_t *drive)
1355 {
1356         idefloppy_floppy_t *floppy;
1357         struct gendisk *g;
1358
1359         if (!strstr("ide-floppy", drive->driver_req))
1360                 goto failed;
1361
1362         if (drive->media != ide_floppy)
1363                 goto failed;
1364
1365         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1366                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1367                                 " of ide-floppy\n", drive->name);
1368                 goto failed;
1369         }
1370         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1371         if (!floppy) {
1372                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1373                                 " structure\n", drive->name);
1374                 goto failed;
1375         }
1376
1377         g = alloc_disk(1 << PARTN_BITS);
1378         if (!g)
1379                 goto out_free_floppy;
1380
1381         ide_init_disk(g, drive);
1382
1383         kref_init(&floppy->kref);
1384
1385         floppy->drive = drive;
1386         floppy->driver = &idefloppy_driver;
1387         floppy->disk = g;
1388
1389         g->private_data = &floppy->driver;
1390
1391         drive->driver_data = floppy;
1392
1393         idefloppy_setup(drive, floppy);
1394
1395         g->minors = 1 << PARTN_BITS;
1396         g->driverfs_dev = &drive->gendev;
1397         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1398         g->fops = &idefloppy_ops;
1399         drive->attach = 1;
1400         add_disk(g);
1401         return 0;
1402
1403 out_free_floppy:
1404         kfree(floppy);
1405 failed:
1406         return -ENODEV;
1407 }
1408
1409 static void __exit idefloppy_exit(void)
1410 {
1411         driver_unregister(&idefloppy_driver.gen_driver);
1412 }
1413
1414 static int __init idefloppy_init(void)
1415 {
1416         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1417         return driver_register(&idefloppy_driver.gen_driver);
1418 }
1419
1420 MODULE_ALIAS("ide:*m-floppy*");
1421 module_init(idefloppy_init);
1422 module_exit(idefloppy_exit);
1423 MODULE_LICENSE("GPL");
1424 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1425