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
   9 /*
  10  * The driver currently doesn't have any fancy features, just the bare
  11  * minimum read/write support.
  12  *
  13  * This driver supports the following IDE floppy drives:
  14  *
  15  * LS-120/240 SuperDisk
  16  * Iomega Zip 100/250
  17  * Iomega PC Card Clik!/PocketZip
  18  *
  19  * For a historical changelog see
  20  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  21  */
  22
  23 #define IDEFLOPPY_VERSION "0.99.newide"
  24
  25 #include <linux/module.h>
  26 #include <linux/types.h>
  27 #include <linux/string.h>
  28 #include <linux/kernel.h>
  29 #include <linux/delay.h>
  30 #include <linux/timer.h>
  31 #include <linux/mm.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/major.h>
  34 #include <linux/errno.h>
  35 #include <linux/genhd.h>
  36 #include <linux/slab.h>
  37 #include <linux/cdrom.h>
  38 #include <linux/ide.h>
  39 #include <linux/bitops.h>
  40 #include <linux/mutex.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 /*
  51  *      The following are used to debug the driver.
  52  */
  53 #define IDEFLOPPY_DEBUG_LOG             0
  54 #define IDEFLOPPY_DEBUG_INFO            0
  55
  56 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  57 #define IDEFLOPPY_DEBUG( fmt, args... )
  58
  59 #if IDEFLOPPY_DEBUG_LOG
  60 #define debug_log(fmt, args...) \
  61         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  62 #else
  63 #define debug_log(fmt, args... ) do {} while(0)
  64 #endif
  65
  66
  67 /*
  68  *      Some drives require a longer irq timeout.
  69  */
  70 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  71
  72 /*
  73  *      After each failed packet command we issue a request sense command
  74  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  75  */
  76 #define IDEFLOPPY_MAX_PC_RETRIES        3
  77
  78 /*
  79  *      With each packet command, we allocate a buffer of
  80  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
  81  */
  82 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  83
  84 /*
  85  *      In various places in the driver, we need to allocate storage
  86  *      for packet commands and requests, which will remain valid while
  87  *      we leave the driver to wait for an interrupt or a timeout event.
  88  */
  89 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  90
  91 /*
  92  *      Our view of a packet command.
  93  */
  94 typedef struct idefloppy_packet_command_s {
  95         u8 c[12];                               /* Actual packet bytes */
  96         int retries;                            /* On each retry, we increment retries */
  97         int error;                              /* Error code */
  98         int request_transfer;                   /* Bytes to transfer */
  99         int actually_transferred;               /* Bytes actually transferred */
 100         int buffer_size;                        /* Size of our data buffer */
 101         int b_count;                            /* Missing/Available data on the current buffer */
 102         struct request *rq;                     /* The corresponding request */
 103         u8 *buffer;                             /* Data buffer */
 104         u8 *current_position;                   /* Pointer into the above buffer */
 105         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 106         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 107         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 108 } idefloppy_pc_t;
 109
 110 /*
 111  *      Packet command flag bits.
 112  */
 113 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 114 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 115 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 116 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 117 #define PC_WRITING                      5       /* Data direction */
 118
 119 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 120
 121 /* format capacities descriptor codes */
 122 #define CAPACITY_INVALID        0x00
 123 #define CAPACITY_UNFORMATTED    0x01
 124 #define CAPACITY_CURRENT        0x02
 125 #define CAPACITY_NO_CARTRIDGE   0x03
 126
 127 /*
 128  *      Most of our global data which we need to save even as we leave the
 129  *      driver due to an interrupt or a timer event is stored in a variable
 130  *      of type idefloppy_floppy_t, defined below.
 131  */
 132 typedef struct ide_floppy_obj {
 133         ide_drive_t     *drive;
 134         ide_driver_t    *driver;
 135         struct gendisk  *disk;
 136         struct kref     kref;
 137         unsigned int    openers;        /* protected by BKL for now */
 138
 139         /* Current packet command */
 140         idefloppy_pc_t *pc;
 141         /* Last failed packet command */
 142         idefloppy_pc_t *failed_pc;
 143         /* Packet command stack */
 144         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 145         /* Next free packet command storage space */
 146         int pc_stack_index;
 147         struct request rq_stack[IDEFLOPPY_PC_STACK];
 148         /* We implement a circular array */
 149         int rq_stack_index;
 150
 151         /*
 152          *      Last error information
 153          */
 154         u8 sense_key, asc, ascq;
 155         /* delay this long before sending packet command */
 156         u8 ticks;
 157         int progress_indication;
 158
 159         /*
 160          *      Device information
 161          */
 162         /* Current format */
 163         int blocks, block_size, bs_factor;
 164         /* Last format capacity descriptor */
 165         u8 cap_desc[8];
 166         /* Copy of the flexible disk page */
 167         u8 flexible_disk_page[32];
 168         /* Write protect */
 169         int wp;
 170         /* Supports format progress report */
 171         int srfp;
 172         /* Status/Action flags */
 173         unsigned long flags;
 174 } idefloppy_floppy_t;
 175
 176 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 177
 178 /*
 179  *      Floppy flag bits values.
 180  */
 181 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 182 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 183 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 184 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 185 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 186 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 187
 188 /*
 189  *      Defines for the mode sense command
 190  */
 191 #define MODE_SENSE_CURRENT              0x00
 192 #define MODE_SENSE_CHANGEABLE           0x01
 193 #define MODE_SENSE_DEFAULT              0x02
 194 #define MODE_SENSE_SAVED                0x03
 195
 196 /*
 197  *      IOCTLs used in low-level formatting.
 198  */
 199
 200 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 201 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 202 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 203 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 204
 205 /*
 206  *      Error codes which are returned in rq->errors to the higher part
 207  *      of the driver.
 208  */
 209 #define IDEFLOPPY_ERROR_GENERAL         101
 210
 211 /*
 212  *      The following is used to format the general configuration word of
 213  *      the ATAPI IDENTIFY DEVICE command.
 214  */
 215 struct idefloppy_id_gcw {
 216 #if defined(__LITTLE_ENDIAN_BITFIELD)
 217         unsigned packet_size            :2;     /* Packet Size */
 218         unsigned reserved234            :3;     /* Reserved */
 219         unsigned drq_type               :2;     /* Command packet DRQ type */
 220         unsigned removable              :1;     /* Removable media */
 221         unsigned device_type            :5;     /* Device type */
 222         unsigned reserved13             :1;     /* Reserved */
 223         unsigned protocol               :2;     /* Protocol type */
 224 #elif defined(__BIG_ENDIAN_BITFIELD)
 225         unsigned protocol               :2;     /* Protocol type */
 226         unsigned reserved13             :1;     /* Reserved */
 227         unsigned device_type            :5;     /* Device type */
 228         unsigned removable              :1;     /* Removable media */
 229         unsigned drq_type               :2;     /* Command packet DRQ type */
 230         unsigned reserved234            :3;     /* Reserved */
 231         unsigned packet_size            :2;     /* Packet Size */
 232 #else
 233 #error "Bitfield endianness not defined! Check your byteorder.h"
 234 #endif
 235 };
 236
 237 /*
 238  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 239  * See SFF-8070i spec.
 240  */
 241 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 242 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 243
 244 static DEFINE_MUTEX(idefloppy_ref_mutex);
 245
 246 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 247
 248 #define ide_floppy_g(disk) \
 249         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 250
 251 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 252 {
 253         struct ide_floppy_obj *floppy = NULL;
 254
 255         mutex_lock(&idefloppy_ref_mutex);
 256         floppy = ide_floppy_g(disk);
 257         if (floppy)
 258                 kref_get(&floppy->kref);
 259         mutex_unlock(&idefloppy_ref_mutex);
 260         return floppy;
 261 }
 262
 263 static void idefloppy_cleanup_obj(struct kref *);
 264
 265 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 266 {
 267         mutex_lock(&idefloppy_ref_mutex);
 268         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 269         mutex_unlock(&idefloppy_ref_mutex);
 270 }
 271
 272 /*
 273  *      Too bad. The drive wants to send us data which we are not ready to accept.
 274  *      Just throw it away.
 275  */
 276 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 277 {
 278         while (bcount--)
 279                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 280 }
 281
 282 static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
 283 {
 284         while (bcount--)
 285                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 286 }
 287
 288
 289 /*
 290  *      idefloppy_do_end_request is used to finish servicing a request.
 291  *
 292  *      For read/write requests, we will call ide_end_request to pass to the
 293  *      next buffer.
 294  */
 295 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 296 {
 297         idefloppy_floppy_t *floppy = drive->driver_data;
 298         struct request *rq = HWGROUP(drive)->rq;
 299         int error;
 300
 301         debug_log("Reached %s\n", __func__);
 302
 303         switch (uptodate) {
 304                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 305                 case 1: error = 0; break;
 306                 default: error = uptodate;
 307         }
 308         if (error)
 309                 floppy->failed_pc = NULL;
 310         /* Why does this happen? */
 311         if (!rq)
 312                 return 0;
 313         if (!blk_special_request(rq)) {
 314                 /* our real local end request function */
 315                 ide_end_request(drive, uptodate, nsecs);
 316                 return 0;
 317         }
 318         rq->errors = error;
 319         /* fixme: need to move this local also */
 320         ide_end_drive_cmd(drive, 0, 0);
 321         return 0;
 322 }
 323
 324 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 325 {
 326         struct request *rq = pc->rq;
 327         struct bio_vec *bvec;
 328         struct req_iterator iter;
 329         unsigned long flags;
 330         char *data;
 331         int count, done = 0;
 332
 333         rq_for_each_segment(bvec, rq, iter) {
 334                 if (!bcount)
 335                         break;
 336
 337                 count = min(bvec->bv_len, bcount);
 338
 339                 data = bvec_kmap_irq(bvec, &flags);
 340                 drive->hwif->atapi_input_bytes(drive, data, count);
 341                 bvec_kunmap_irq(data, &flags);
 342
 343                 bcount -= count;
 344                 pc->b_count += count;
 345                 done += count;
 346         }
 347
 348         idefloppy_do_end_request(drive, 1, done >> 9);
 349
 350         if (bcount) {
 351                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 352                 idefloppy_discard_data(drive, bcount);
 353         }
 354 }
 355
 356 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 357 {
 358         struct request *rq = pc->rq;
 359         struct req_iterator iter;
 360         struct bio_vec *bvec;
 361         unsigned long flags;
 362         int count, done = 0;
 363         char *data;
 364
 365         rq_for_each_segment(bvec, rq, iter) {
 366                 if (!bcount)
 367                         break;
 368
 369                 count = min(bvec->bv_len, bcount);
 370
 371                 data = bvec_kmap_irq(bvec, &flags);
 372                 drive->hwif->atapi_output_bytes(drive, data, count);
 373                 bvec_kunmap_irq(data, &flags);
 374
 375                 bcount -= count;
 376                 pc->b_count += count;
 377                 done += count;
 378         }
 379
 380         idefloppy_do_end_request(drive, 1, done >> 9);
 381
 382         if (bcount) {
 383                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 384                 idefloppy_write_zeros(drive, bcount);
 385         }
 386 }
 387
 388 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 389 {
 390         struct request *rq = pc->rq;
 391         struct bio *bio = rq->bio;
 392
 393         while ((bio = rq->bio) != NULL)
 394                 idefloppy_do_end_request(drive, 1, 0);
 395 }
 396
 397 /*
 398  *      idefloppy_queue_pc_head generates a new packet command request in front
 399  *      of the request queue, before the current request, so that it will be
 400  *      processed immediately, on the next pass through the driver.
 401  */
 402 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 403 {
 404         struct ide_floppy_obj *floppy = drive->driver_data;
 405
 406         ide_init_drive_cmd(rq);
 407         rq->buffer = (char *) pc;
 408         rq->cmd_type = REQ_TYPE_SPECIAL;
 409         rq->rq_disk = floppy->disk;
 410         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 411 }
 412
 413 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 414 {
 415         idefloppy_floppy_t *floppy = drive->driver_data;
 416
 417         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 418                 floppy->pc_stack_index=0;
 419         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 420 }
 421
 422 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 423 {
 424         idefloppy_floppy_t *floppy = drive->driver_data;
 425
 426         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 427                 floppy->rq_stack_index = 0;
 428         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 429 }
 430
 431 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 432 {
 433         idefloppy_floppy_t *floppy = drive->driver_data;
 434         u8 *buf = floppy->pc->buffer;
 435
 436         debug_log("Reached %s\n", __func__);
 437
 438         if (!floppy->pc->error) {
 439                 floppy->sense_key = buf[2] & 0x0F;
 440                 floppy->asc = buf[12];
 441                 floppy->ascq = buf[13];
 442                 floppy->progress_indication = buf[15] & 0x80 ?
 443                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 444
 445                 if (floppy->failed_pc)
 446                         debug_log("pc = %x, sense key = %x, asc = %x,"
 447                                         " ascq = %x\n",
 448                                         floppy->failed_pc->c[0],
 449                                         floppy->sense_key,
 450                                         floppy->asc,
 451                                         floppy->ascq);
 452                 else
 453                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 454                                         floppy->sense_key,
 455                                         floppy->asc,
 456                                         floppy->ascq);
 457
 458
 459                 idefloppy_do_end_request(drive, 1, 0);
 460         } else {
 461                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 462                                 " request!\n");
 463                 idefloppy_do_end_request(drive, 0, 0);
 464         }
 465 }
 466
 467 /*
 468  *      General packet command callback function.
 469  */
 470 static void idefloppy_pc_callback (ide_drive_t *drive)
 471 {
 472         idefloppy_floppy_t *floppy = drive->driver_data;
 473
 474         debug_log("Reached %s\n", __func__);
 475
 476         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 477 }
 478
 479 /*
 480  *      idefloppy_init_pc initializes a packet command.
 481  */
 482 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 483 {
 484         memset(pc->c, 0, 12);
 485         pc->retries = 0;
 486         pc->flags = 0;
 487         pc->request_transfer = 0;
 488         pc->buffer = pc->pc_buffer;
 489         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 490         pc->callback = &idefloppy_pc_callback;
 491 }
 492
 493 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 494 {
 495         idefloppy_init_pc(pc);
 496         pc->c[0] = GPCMD_REQUEST_SENSE;
 497         pc->c[4] = 255;
 498         pc->request_transfer = 18;
 499         pc->callback = &idefloppy_request_sense_callback;
 500 }
 501
 502 /*
 503  *      idefloppy_retry_pc is called when an error was detected during the
 504  *      last packet command. We queue a request sense packet command in
 505  *      the head of the request list.
 506  */
 507 static void idefloppy_retry_pc (ide_drive_t *drive)
 508 {
 509         idefloppy_pc_t *pc;
 510         struct request *rq;
 511
 512         (void)drive->hwif->INB(IDE_ERROR_REG);
 513         pc = idefloppy_next_pc_storage(drive);
 514         rq = idefloppy_next_rq_storage(drive);
 515         idefloppy_create_request_sense_cmd(pc);
 516         idefloppy_queue_pc_head(drive, pc, rq);
 517 }
 518
 519 /*
 520  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 521  *      during a packet command.
 522  */
 523 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 524 {
 525         idefloppy_floppy_t *floppy = drive->driver_data;
 526         ide_hwif_t *hwif = drive->hwif;
 527         idefloppy_pc_t *pc = floppy->pc;
 528         struct request *rq = pc->rq;
 529         unsigned int temp;
 530         int dma_error = 0;
 531         u16 bcount;
 532         u8 stat, ireason;
 533
 534         debug_log("Reached %s interrupt handler\n", __func__);
 535
 536         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 537                 dma_error = hwif->ide_dma_end(drive);
 538                 if (dma_error) {
 539                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 540                                         rq_data_dir(rq) ? "write" : "read");
 541                         set_bit(PC_DMA_ERROR, &pc->flags);
 542                 } else {
 543                         pc->actually_transferred = pc->request_transfer;
 544                         idefloppy_update_buffers(drive, pc);
 545                 }
 546                 debug_log("DMA finished\n");
 547         }
 548
 549         /* Clear the interrupt */
 550         stat = drive->hwif->INB(IDE_STATUS_REG);
 551
 552         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 553                 debug_log("Packet command completed, %d bytes transferred\n",
 554                                 pc->actually_transferred);
 555                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 556
 557                 local_irq_enable_in_hardirq();
 558
 559                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 560                         /* Error detected */
 561                         debug_log("%s: I/O error\n", drive->name);
 562                         rq->errors++;
 563                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 564                                 printk(KERN_ERR "ide-floppy: I/O error in "
 565                                         "request sense command\n");
 566                                 return ide_do_reset(drive);
 567                         }
 568                         /* Retry operation */
 569                         idefloppy_retry_pc(drive);
 570                         /* queued, but not started */
 571                         return ide_stopped;
 572                 }
 573                 pc->error = 0;
 574                 if (floppy->failed_pc == pc)
 575                         floppy->failed_pc = NULL;
 576                 /* Command finished - Call the callback function */
 577                 pc->callback(drive);
 578                 return ide_stopped;
 579         }
 580
 581         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 582                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 583                         "more interrupts in DMA mode\n");
 584                 ide_dma_off(drive);
 585                 return ide_do_reset(drive);
 586         }
 587
 588         /* Get the number of bytes to transfer */
 589         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 590                   hwif->INB(IDE_BCOUNTL_REG);
 591         /* on this interrupt */
 592         ireason = hwif->INB(IDE_IREASON_REG);
 593
 594         if (ireason & CD) {
 595                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 596                 return ide_do_reset(drive);
 597         }
 598         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 599                 /* Hopefully, we will never get here */
 600                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 601                                 (ireason & IO) ? "Write" : "Read");
 602                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 603                                 (ireason & IO) ? "Read" : "Write");
 604                 return ide_do_reset(drive);
 605         }
 606         if (!test_bit(PC_WRITING, &pc->flags)) {
 607                 /* Reading - Check that we have enough space */
 608                 temp = pc->actually_transferred + bcount;
 609                 if (temp > pc->request_transfer) {
 610                         if (temp > pc->buffer_size) {
 611                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 612                                         "to send us more data than expected "
 613                                         "- discarding data\n");
 614                                 idefloppy_discard_data(drive, bcount);
 615
 616                                 ide_set_handler(drive,
 617                                                 &idefloppy_pc_intr,
 618                                                 IDEFLOPPY_WAIT_CMD,
 619                                                 NULL);
 620                                 return ide_started;
 621                         }
 622                         debug_log("The floppy wants to send us more data than"
 623                                         " expected - allowing transfer\n");
 624                 }
 625         }
 626         if (test_bit(PC_WRITING, &pc->flags)) {
 627                 if (pc->buffer != NULL)
 628                         /* Write the current buffer */
 629                         hwif->atapi_output_bytes(drive, pc->current_position,
 630                                                  bcount);
 631                 else
 632                         idefloppy_output_buffers(drive, pc, bcount);
 633         } else {
 634                 if (pc->buffer != NULL)
 635                         /* Read the current buffer */
 636                         hwif->atapi_input_bytes(drive, pc->current_position,
 637                                                 bcount);
 638                 else
 639                         idefloppy_input_buffers(drive, pc, bcount);
 640         }
 641         /* Update the current position */
 642         pc->actually_transferred += bcount;
 643         pc->current_position += bcount;
 644
 645         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 646         return ide_started;
 647 }
 648
 649 /*
 650  * This is the original routine that did the packet transfer.
 651  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 652  * for that drive below. The algorithm is chosen based on drive type
 653  */
 654 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 655 {
 656         ide_startstop_t startstop;
 657         idefloppy_floppy_t *floppy = drive->driver_data;
 658         u8 ireason;
 659
 660         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 661                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 662                                 "initiated yet DRQ isn't asserted\n");
 663                 return startstop;
 664         }
 665         ireason = drive->hwif->INB(IDE_IREASON_REG);
 666         if ((ireason & CD) == 0 || (ireason & IO)) {
 667                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 668                                 "issuing a packet command\n");
 669                 return ide_do_reset(drive);
 670         }
 671
 672         /* Set the interrupt routine */
 673         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 674         /* Send the actual packet */
 675         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 676         return ide_started;
 677 }
 678
 679
 680 /*
 681  * What we have here is a classic case of a top half / bottom half
 682  * interrupt service routine. In interrupt mode, the device sends
 683  * an interrupt to signal it's ready to receive a packet. However,
 684  * we need to delay about 2-3 ticks before issuing the packet or we
 685  * gets in trouble.
 686  *
 687  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 688  * directly). In either case, when the device says it's ready for a
 689  * packet, we schedule the packet transfer to occur about 2-3 ticks
 690  * later in transfer_pc2.
 691  */
 692 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 693 {
 694         idefloppy_floppy_t *floppy = drive->driver_data;
 695
 696         /* Send the actual packet */
 697         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 698         /* Timeout for the packet command */
 699         return IDEFLOPPY_WAIT_CMD;
 700 }
 701
 702 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 703 {
 704         idefloppy_floppy_t *floppy = drive->driver_data;
 705         ide_startstop_t startstop;
 706         u8 ireason;
 707
 708         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 709                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 710                                 "initiated yet DRQ isn't asserted\n");
 711                 return startstop;
 712         }
 713         ireason = drive->hwif->INB(IDE_IREASON_REG);
 714         if ((ireason & CD) == 0 || (ireason & IO)) {
 715                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 716                                 "while issuing a packet command\n");
 717                 return ide_do_reset(drive);
 718         }
 719         /*
 720          * The following delay solves a problem with ATAPI Zip 100 drives
 721          * where the Busy flag was apparently being deasserted before the
 722          * unit was ready to receive data. This was happening on a
 723          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 724          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 725          * used until after the packet is moved in about 50 msec.
 726          */
 727
 728         ide_set_handler(drive,
 729           &idefloppy_pc_intr,           /* service routine for packet command */
 730           floppy->ticks,                /* wait this long before "failing" */
 731           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 732         return ide_started;
 733 }
 734
 735 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 736                                     idefloppy_pc_t *pc)
 737 {
 738         /* supress error messages resulting from Medium not present */
 739         if (floppy->sense_key == 0x02 &&
 740             floppy->asc       == 0x3a &&
 741             floppy->ascq      == 0x00)
 742                 return;
 743
 744         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 745                         "asc = %2x, ascq = %2x\n",
 746                         floppy->drive->name, pc->c[0], floppy->sense_key,
 747                         floppy->asc, floppy->ascq);
 748
 749 }
 750
 751 /*
 752  *      Issue a packet command
 753  */
 754 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 755 {
 756         idefloppy_floppy_t *floppy = drive->driver_data;
 757         ide_hwif_t *hwif = drive->hwif;
 758         ide_handler_t *pkt_xfer_routine;
 759         u16 bcount;
 760         u8 dma;
 761
 762         if (floppy->failed_pc == NULL &&
 763             pc->c[0] != GPCMD_REQUEST_SENSE)
 764                 floppy->failed_pc = pc;
 765         /* Set the current packet command */
 766         floppy->pc = pc;
 767
 768         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
 769             test_bit(PC_ABORT, &pc->flags)) {
 770                 /*
 771                  *      We will "abort" retrying a packet command in case
 772                  *      a legitimate error code was received.
 773                  */
 774                 if (!test_bit(PC_ABORT, &pc->flags)) {
 775                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
 776                                 ide_floppy_report_error(floppy, pc);
 777                         /* Giving up */
 778                         pc->error = IDEFLOPPY_ERROR_GENERAL;
 779                 }
 780                 floppy->failed_pc = NULL;
 781                 pc->callback(drive);
 782                 return ide_stopped;
 783         }
 784
 785         debug_log("Retry number - %d\n", pc->retries);
 786
 787         pc->retries++;
 788         /* We haven't transferred any data yet */
 789         pc->actually_transferred = 0;
 790         pc->current_position = pc->buffer;
 791         bcount = min(pc->request_transfer, 63 * 1024);
 792
 793         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 794                 ide_dma_off(drive);
 795
 796         dma = 0;
 797
 798         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 799                 dma = !hwif->dma_setup(drive);
 800
 801         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 802                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 803
 804         if (dma) {      /* Begin DMA, if necessary */
 805                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 806                 hwif->dma_start(drive);
 807         }
 808
 809         /* Can we transfer the packet when we get the interrupt or wait? */
 810         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
 811                 /* wait */
 812                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 813         } else {
 814                 /* immediate */
 815                 pkt_xfer_routine = &idefloppy_transfer_pc;
 816         }
 817
 818         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
 819                 /* Issue the packet command */
 820                 ide_execute_command(drive, WIN_PACKETCMD,
 821                                 pkt_xfer_routine,
 822                                 IDEFLOPPY_WAIT_CMD,
 823                                 NULL);
 824                 return ide_started;
 825         } else {
 826                 /* Issue the packet command */
 827                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 828                 return (*pkt_xfer_routine) (drive);
 829         }
 830 }
 831
 832 static void idefloppy_rw_callback (ide_drive_t *drive)
 833 {
 834         debug_log("Reached %s\n", __func__);
 835
 836         idefloppy_do_end_request(drive, 1, 0);
 837         return;
 838 }
 839
 840 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 841 {
 842         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 843
 844         idefloppy_init_pc(pc);
 845         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 846         pc->c[4] = prevent;
 847 }
 848
 849 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 850 {
 851         idefloppy_init_pc(pc);
 852         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 853         pc->c[7] = 255;
 854         pc->c[8] = 255;
 855         pc->request_transfer = 255;
 856 }
 857
 858 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 859                                               int flags)
 860 {
 861         idefloppy_init_pc(pc);
 862         pc->c[0] = GPCMD_FORMAT_UNIT;
 863         pc->c[1] = 0x17;
 864
 865         memset(pc->buffer, 0, 12);
 866         pc->buffer[1] = 0xA2;
 867         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 868
 869         if (flags & 1)                          /* Verify bit on... */
 870                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 871         pc->buffer[3] = 8;
 872
 873         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 874         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 875         pc->buffer_size=12;
 876         set_bit(PC_WRITING, &pc->flags);
 877 }
 878
 879 /*
 880  *      A mode sense command is used to "sense" floppy parameters.
 881  */
 882 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 883 {
 884         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 885
 886         idefloppy_init_pc(pc);
 887         pc->c[0] = GPCMD_MODE_SENSE_10;
 888         pc->c[1] = 0;
 889         pc->c[2] = page_code + (type << 6);
 890
 891         switch (page_code) {
 892                 case IDEFLOPPY_CAPABILITIES_PAGE:
 893                         length += 12;
 894                         break;
 895                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 896                         length += 32;
 897                         break;
 898                 default:
 899                         printk(KERN_ERR "ide-floppy: unsupported page code "
 900                                 "in create_mode_sense_cmd\n");
 901         }
 902         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 903         pc->request_transfer = length;
 904 }
 905
 906 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 907 {
 908         idefloppy_init_pc(pc);
 909         pc->c[0] = GPCMD_START_STOP_UNIT;
 910         pc->c[4] = start;
 911 }
 912
 913 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 914 {
 915         idefloppy_init_pc(pc);
 916         pc->c[0] = GPCMD_TEST_UNIT_READY;
 917 }
 918
 919 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
 920 {
 921         int block = sector / floppy->bs_factor;
 922         int blocks = rq->nr_sectors / floppy->bs_factor;
 923         int cmd = rq_data_dir(rq);
 924
 925         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
 926                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
 927                 block, blocks);
 928
 929         idefloppy_init_pc(pc);
 930         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
 931                 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12;
 932                 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]);
 933         } else {
 934                 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 935                 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 936         }
 937         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 938         pc->callback = &idefloppy_rw_callback;
 939         pc->rq = rq;
 940         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 941         if (rq->cmd_flags & REQ_RW)
 942                 set_bit(PC_WRITING, &pc->flags);
 943         pc->buffer = NULL;
 944         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 945         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 946 }
 947
 948 static void
 949 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 950 {
 951         idefloppy_init_pc(pc);
 952         pc->callback = &idefloppy_rw_callback;
 953         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 954         pc->rq = rq;
 955         pc->b_count = rq->data_len;
 956         if (rq->data_len && rq_data_dir(rq) == WRITE)
 957                 set_bit(PC_WRITING, &pc->flags);
 958         pc->buffer = rq->data;
 959         if (rq->bio)
 960                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 961
 962         /*
 963          * possibly problematic, doesn't look like ide-floppy correctly
 964          * handled scattered requests if dma fails...
 965          */
 966         pc->request_transfer = pc->buffer_size = rq->data_len;
 967 }
 968
 969 /*
 970  *      idefloppy_do_request is our request handling function.
 971  */
 972 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
 973 {
 974         idefloppy_floppy_t *floppy = drive->driver_data;
 975         idefloppy_pc_t *pc;
 976         unsigned long block = (unsigned long)block_s;
 977
 978         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 979                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 980                         rq->cmd_type, rq->errors);
 981         debug_log("sector: %ld, nr_sectors: %ld, "
 982                         "current_nr_sectors: %d\n", (long)rq->sector,
 983                         rq->nr_sectors, rq->current_nr_sectors);
 984
 985         if (rq->errors >= ERROR_MAX) {
 986                 if (floppy->failed_pc)
 987                         ide_floppy_report_error(floppy, floppy->failed_pc);
 988                 else
 989                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 990                                 drive->name);
 991                 idefloppy_do_end_request(drive, 0, 0);
 992                 return ide_stopped;
 993         }
 994         if (blk_fs_request(rq)) {
 995                 if (((long)rq->sector % floppy->bs_factor) ||
 996                     (rq->nr_sectors % floppy->bs_factor)) {
 997                         printk("%s: unsupported r/w request size\n",
 998                                 drive->name);
 999                         idefloppy_do_end_request(drive, 0, 0);
1000                         return ide_stopped;
1001                 }
1002                 pc = idefloppy_next_pc_storage(drive);
1003                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1004         } else if (blk_special_request(rq)) {
1005                 pc = (idefloppy_pc_t *) rq->buffer;
1006         } else if (blk_pc_request(rq)) {
1007                 pc = idefloppy_next_pc_storage(drive);
1008                 idefloppy_blockpc_cmd(floppy, pc, rq);
1009         } else {
1010                 blk_dump_rq_flags(rq,
1011                         "ide-floppy: unsupported command in queue");
1012                 idefloppy_do_end_request(drive, 0, 0);
1013                 return ide_stopped;
1014         }
1015
1016         pc->rq = rq;
1017         return idefloppy_issue_pc(drive, pc);
1018 }
1019
1020 /*
1021  *      idefloppy_queue_pc_tail adds a special packet command request to the
1022  *      tail of the request queue, and waits for it to be serviced.
1023  */
1024 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1025 {
1026         struct ide_floppy_obj *floppy = drive->driver_data;
1027         struct request rq;
1028
1029         ide_init_drive_cmd (&rq);
1030         rq.buffer = (char *) pc;
1031         rq.cmd_type = REQ_TYPE_SPECIAL;
1032         rq.rq_disk = floppy->disk;
1033
1034         return ide_do_drive_cmd(drive, &rq, ide_wait);
1035 }
1036
1037 /*
1038  * Look at the flexible disk page parameters. We ignore the CHS capacity
1039  * parameters and use the LBA parameters instead.
1040  */
1041 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1042 {
1043         idefloppy_floppy_t *floppy = drive->driver_data;
1044         idefloppy_pc_t pc;
1045         u8 *page;
1046         int capacity, lba_capacity;
1047         u16 transfer_rate, sector_size, cyls, rpm;
1048         u8 heads, sectors;
1049
1050         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1051                                         MODE_SENSE_CURRENT);
1052
1053         if (idefloppy_queue_pc_tail(drive, &pc)) {
1054                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1055                                 " parameters\n");
1056                 return 1;
1057         }
1058         floppy->wp = !!(pc.buffer[3] & 0x80);
1059         set_disk_ro(floppy->disk, floppy->wp);
1060         page = &pc.buffer[8];
1061
1062         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1063         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1064         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1065         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1066         heads         = pc.buffer[8 + 4];
1067         sectors       = pc.buffer[8 + 5];
1068
1069         capacity = cyls * heads * sectors * sector_size;
1070
1071         if (memcmp(page, &floppy->flexible_disk_page, 32))
1072                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1073                                 "%d sector size, %d rpm\n",
1074                                 drive->name, capacity / 1024, cyls, heads,
1075                                 sectors, transfer_rate / 8, sector_size, rpm);
1076
1077         memcpy(&floppy->flexible_disk_page, page, 32);
1078         drive->bios_cyl = cyls;
1079         drive->bios_head = heads;
1080         drive->bios_sect = sectors;
1081         lba_capacity = floppy->blocks * floppy->block_size;
1082
1083         if (capacity < lba_capacity) {
1084                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1085                         "bytes, but the drive only handles %d\n",
1086                         drive->name, lba_capacity, capacity);
1087                 floppy->blocks = floppy->block_size ?
1088                         capacity / floppy->block_size : 0;
1089         }
1090         return 0;
1091 }
1092
1093 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1094 {
1095         idefloppy_floppy_t *floppy = drive->driver_data;
1096         idefloppy_pc_t pc;
1097
1098         floppy->srfp = 0;
1099         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1100                                                  MODE_SENSE_CURRENT);
1101
1102         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1103         if (idefloppy_queue_pc_tail(drive, &pc))
1104                 return 1;
1105
1106         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1107         return (0);
1108 }
1109
1110 /*
1111  * Determine if a media is present in the floppy drive, and if so, its LBA
1112  * capacity.
1113  */
1114 static int ide_floppy_get_capacity(ide_drive_t *drive)
1115 {
1116         idefloppy_floppy_t *floppy = drive->driver_data;
1117         idefloppy_pc_t pc;
1118         u8 *cap_desc;
1119         u8 header_len, desc_cnt;
1120         int i, rc = 1, blocks, length;
1121
1122         drive->bios_cyl = 0;
1123         drive->bios_head = drive->bios_sect = 0;
1124         floppy->blocks = 0;
1125         floppy->bs_factor = 1;
1126         set_capacity(floppy->disk, 0);
1127
1128         idefloppy_create_read_capacity_cmd(&pc);
1129         if (idefloppy_queue_pc_tail(drive, &pc)) {
1130                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1131                 return 1;
1132         }
1133         header_len = pc.buffer[3];
1134         cap_desc = &pc.buffer[4];
1135         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1136
1137         for (i = 0; i < desc_cnt; i++) {
1138                 unsigned int desc_start = 4 + i*8;
1139
1140                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1141                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1142
1143                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1144                                 i, blocks * length / 1024, blocks, length);
1145
1146                 if (i)
1147                         continue;
1148                 /*
1149                  * the code below is valid only for the 1st descriptor, ie i=0
1150                  */
1151
1152                 switch (pc.buffer[desc_start + 4] & 0x03) {
1153                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1154                 case CAPACITY_UNFORMATTED:
1155                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1156                                 /*
1157                                  * If it is not a clik drive, break out
1158                                  * (maintains previous driver behaviour)
1159                                  */
1160                                 break;
1161                 case CAPACITY_CURRENT:
1162                         /* Normal Zip/LS-120 disks */
1163                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1164                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1165                                         "sector size\n", drive->name,
1166                                         blocks * length / 1024, blocks, length);
1167                         memcpy(&floppy->cap_desc, cap_desc, 8);
1168
1169                         if (!length || length % 512) {
1170                                 printk(KERN_NOTICE "%s: %d bytes block size "
1171                                         "not supported\n", drive->name, length);
1172                         } else {
1173                                 floppy->blocks = blocks;
1174                                 floppy->block_size = length;
1175                                 floppy->bs_factor = length / 512;
1176                                 if (floppy->bs_factor != 1)
1177                                         printk(KERN_NOTICE "%s: warning: non "
1178                                                 "512 bytes block size not "
1179                                                 "fully supported\n",
1180                                                 drive->name);
1181                                 rc = 0;
1182                         }
1183                         break;
1184                 case CAPACITY_NO_CARTRIDGE:
1185                         /*
1186                          * This is a KERN_ERR so it appears on screen
1187                          * for the user to see
1188                          */
1189                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1190                         break;
1191                 case CAPACITY_INVALID:
1192                         printk(KERN_ERR "%s: Invalid capacity for disk "
1193                                 "in drive\n", drive->name);
1194                         break;
1195                 }
1196                 debug_log("Descriptor 0 Code: %d\n",
1197                           pc.buffer[desc_start + 4] & 0x03);
1198         }
1199
1200         /* Clik! disk does not support get_flexible_disk_page */
1201         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1202                 (void) ide_floppy_get_flexible_disk_page(drive);
1203
1204         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1205         return rc;
1206 }
1207
1208 /*
1209  * Obtain the list of formattable capacities.
1210  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1211  * descriptors to userland, instead of our own structures.
1212  *
1213  * Userland gives us the following structure:
1214  *
1215  * struct idefloppy_format_capacities {
1216  *      int nformats;
1217  *      struct {
1218  *              int nblocks;
1219  *              int blocksize;
1220  *      } formats[];
1221  * };
1222  *
1223  * userland initializes nformats to the number of allocated formats[] records.
1224  * On exit we set nformats to the number of records we've actually initialized.
1225  */
1226
1227 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1228 {
1229         idefloppy_pc_t pc;
1230         u8 header_len, desc_cnt;
1231         int i, blocks, length, u_array_size, u_index;
1232         int __user *argp;
1233
1234         if (get_user(u_array_size, arg))
1235                 return (-EFAULT);
1236
1237         if (u_array_size <= 0)
1238                 return (-EINVAL);
1239
1240         idefloppy_create_read_capacity_cmd(&pc);
1241         if (idefloppy_queue_pc_tail(drive, &pc)) {
1242                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1243                 return (-EIO);
1244         }
1245         header_len = pc.buffer[3];
1246         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1247
1248         u_index = 0;
1249         argp = arg + 1;
1250
1251         /*
1252          * We always skip the first capacity descriptor.  That's the current
1253          * capacity.  We are interested in the remaining descriptors, the
1254          * formattable capacities.
1255          */
1256         for (i = 1; i < desc_cnt; i++) {
1257                 unsigned int desc_start = 4 + i*8;
1258
1259                 if (u_index >= u_array_size)
1260                         break;  /* User-supplied buffer too small */
1261
1262                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1263                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1264
1265                 if (put_user(blocks, argp))
1266                         return(-EFAULT);
1267                 ++argp;
1268
1269                 if (put_user(length, argp))
1270                         return (-EFAULT);
1271                 ++argp;
1272
1273                 ++u_index;
1274         }
1275
1276         if (put_user(u_index, arg))
1277                 return (-EFAULT);
1278         return (0);
1279 }
1280
1281 /*
1282 ** Get ATAPI_FORMAT_UNIT progress indication.
1283 **
1284 ** Userland gives a pointer to an int.  The int is set to a progress
1285 ** indicator 0-65536, with 65536=100%.
1286 **
1287 ** If the drive does not support format progress indication, we just check
1288 ** the dsc bit, and return either 0 or 65536.
1289 */
1290
1291 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1292 {
1293         idefloppy_floppy_t *floppy = drive->driver_data;
1294         idefloppy_pc_t pc;
1295         int progress_indication = 0x10000;
1296
1297         if (floppy->srfp) {
1298                 idefloppy_create_request_sense_cmd(&pc);
1299                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1300                         return (-EIO);
1301                 }
1302
1303                 if (floppy->sense_key == 2 &&
1304                     floppy->asc == 4 &&
1305                     floppy->ascq == 4) {
1306                         progress_indication = floppy->progress_indication;
1307                 }
1308                 /* Else assume format_unit has finished, and we're
1309                 ** at 0x10000 */
1310         } else {
1311                 unsigned long flags;
1312                 u8 stat;
1313
1314                 local_irq_save(flags);
1315                 stat = drive->hwif->INB(IDE_STATUS_REG);
1316                 local_irq_restore(flags);
1317
1318                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1319         }
1320         if (put_user(progress_indication, arg))
1321                 return (-EFAULT);
1322
1323         return (0);
1324 }
1325
1326 /*
1327  *      Return the current floppy capacity.
1328  */
1329 static sector_t idefloppy_capacity (ide_drive_t *drive)
1330 {
1331         idefloppy_floppy_t *floppy = drive->driver_data;
1332         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1333
1334         return capacity;
1335 }
1336
1337 /*
1338  *      idefloppy_identify_device checks if we can support a drive,
1339  *      based on the ATAPI IDENTIFY command results.
1340  */
1341 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1342 {
1343         struct idefloppy_id_gcw gcw;
1344 #if IDEFLOPPY_DEBUG_INFO
1345         char buffer[80];
1346 #endif /* IDEFLOPPY_DEBUG_INFO */
1347
1348         *((u16 *) &gcw) = id->config;
1349
1350 #ifdef CONFIG_PPC
1351         /* kludge for Apple PowerBook internal zip */
1352         if ((gcw.device_type == 5) &&
1353             !strstr(id->model, "CD-ROM") &&
1354             strstr(id->model, "ZIP"))
1355                 gcw.device_type = 0;
1356 #endif
1357
1358 #if IDEFLOPPY_DEBUG_INFO
1359         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1360         switch (gcw.protocol) {
1361                 case 0: case 1: sprintf(buffer, "ATA");break;
1362                 case 2: sprintf(buffer, "ATAPI");break;
1363                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1364         }
1365         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1366         switch (gcw.device_type) {
1367                 case 0: sprintf(buffer, "Direct-access Device");break;
1368                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1369                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1370                 case 5: sprintf(buffer, "CD-ROM Device");break;
1371                 case 6: sprintf(buffer, "Reserved");
1372                 case 7: sprintf(buffer, "Optical memory Device");break;
1373                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1374                 default: sprintf(buffer, "Reserved");
1375         }
1376         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1377         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1378         switch (gcw.drq_type) {
1379                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1380                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1381                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1382                 case 3: sprintf(buffer, "Reserved");break;
1383         }
1384         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1385         switch (gcw.packet_size) {
1386                 case 0: sprintf(buffer, "12 bytes");break;
1387                 case 1: sprintf(buffer, "16 bytes");break;
1388                 default: sprintf(buffer, "Reserved");break;
1389         }
1390         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1391 #endif /* IDEFLOPPY_DEBUG_INFO */
1392
1393         if (gcw.protocol != 2)
1394                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1395         else if (gcw.device_type != 0)
1396                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1397         else if (!gcw.removable)
1398                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1399         else if (gcw.drq_type == 3) {
1400                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1401         } else if (gcw.packet_size != 0) {
1402                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1403         } else
1404                 return 1;
1405         return 0;
1406 }
1407
1408 #ifdef CONFIG_IDE_PROC_FS
1409 static void idefloppy_add_settings(ide_drive_t *drive)
1410 {
1411         idefloppy_floppy_t *floppy = drive->driver_data;
1412
1413 /*
1414  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1415  */
1416         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1417         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1418         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1419         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1420 }
1421 #else
1422 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1423 #endif
1424
1425 /*
1426  *      Driver initialization.
1427  */
1428 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1429 {
1430         struct idefloppy_id_gcw gcw;
1431
1432         *((u16 *) &gcw) = drive->id->config;
1433         floppy->pc = floppy->pc_stack;
1434         if (gcw.drq_type == 1)
1435                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1436         /*
1437          *      We used to check revisions here. At this point however
1438          *      I'm giving up. Just assume they are all broken, its easier.
1439          *
1440          *      The actual reason for the workarounds was likely
1441          *      a driver bug after all rather than a firmware bug,
1442          *      and the workaround below used to hide it. It should
1443          *      be fixed as of version 1.9, but to be on the safe side
1444          *      we'll leave the limitation below for the 2.2.x tree.
1445          */
1446
1447         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1448                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1449                 /* This value will be visible in the /proc/ide/hdx/settings */
1450                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1451                 blk_queue_max_sectors(drive->queue, 64);
1452         }
1453
1454         /*
1455         *      Guess what?  The IOMEGA Clik! drive also needs the
1456         *      above fix.  It makes nasty clicking noises without
1457         *      it, so please don't remove this.
1458         */
1459         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1460                 blk_queue_max_sectors(drive->queue, 64);
1461                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1462         }
1463
1464
1465         (void) ide_floppy_get_capacity(drive);
1466         idefloppy_add_settings(drive);
1467 }
1468
1469 static void ide_floppy_remove(ide_drive_t *drive)
1470 {
1471         idefloppy_floppy_t *floppy = drive->driver_data;
1472         struct gendisk *g = floppy->disk;
1473
1474         ide_proc_unregister_driver(drive, floppy->driver);
1475
1476         del_gendisk(g);
1477
1478         ide_floppy_put(floppy);
1479 }
1480
1481 static void idefloppy_cleanup_obj(struct kref *kref)
1482 {
1483         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1484         ide_drive_t *drive = floppy->drive;
1485         struct gendisk *g = floppy->disk;
1486
1487         drive->driver_data = NULL;
1488         g->private_data = NULL;
1489         put_disk(g);
1490         kfree(floppy);
1491 }
1492
1493 #ifdef CONFIG_IDE_PROC_FS
1494 static int proc_idefloppy_read_capacity
1495         (char *page, char **start, off_t off, int count, int *eof, void *data)
1496 {
1497         ide_drive_t*drive = (ide_drive_t *)data;
1498         int len;
1499
1500         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1501         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1502 }
1503
1504 static ide_proc_entry_t idefloppy_proc[] = {
1505         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1506         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1507         { NULL, 0, NULL, NULL }
1508 };
1509 #endif  /* CONFIG_IDE_PROC_FS */
1510
1511 static int ide_floppy_probe(ide_drive_t *);
1512
1513 static ide_driver_t idefloppy_driver = {
1514         .gen_driver = {
1515                 .owner          = THIS_MODULE,
1516                 .name           = "ide-floppy",
1517                 .bus            = &ide_bus_type,
1518         },
1519         .probe                  = ide_floppy_probe,
1520         .remove                 = ide_floppy_remove,
1521         .version                = IDEFLOPPY_VERSION,
1522         .media                  = ide_floppy,
1523         .supports_dsc_overlap   = 0,
1524         .do_request             = idefloppy_do_request,
1525         .end_request            = idefloppy_do_end_request,
1526         .error                  = __ide_error,
1527         .abort                  = __ide_abort,
1528 #ifdef CONFIG_IDE_PROC_FS
1529         .proc                   = idefloppy_proc,
1530 #endif
1531 };
1532
1533 static int idefloppy_open(struct inode *inode, struct file *filp)
1534 {
1535         struct gendisk *disk = inode->i_bdev->bd_disk;
1536         struct ide_floppy_obj *floppy;
1537         ide_drive_t *drive;
1538         idefloppy_pc_t pc;
1539         int ret = 0;
1540
1541         debug_log("Reached %s\n", __func__);
1542
1543         if (!(floppy = ide_floppy_get(disk)))
1544                 return -ENXIO;
1545
1546         drive = floppy->drive;
1547
1548         floppy->openers++;
1549
1550         if (floppy->openers == 1) {
1551                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1552                 /* Just in case */
1553
1554                 idefloppy_create_test_unit_ready_cmd(&pc);
1555                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1556                         idefloppy_create_start_stop_cmd(&pc, 1);
1557                         (void) idefloppy_queue_pc_tail(drive, &pc);
1558                 }
1559
1560                 if (ide_floppy_get_capacity(drive)
1561                    && (filp->f_flags & O_NDELAY) == 0
1562                     /*
1563                     ** Allow O_NDELAY to open a drive without a disk, or with
1564                     ** an unreadable disk, so that we can get the format
1565                     ** capacity of the drive or begin the format - Sam
1566                     */
1567                     ) {
1568                         ret = -EIO;
1569                         goto out_put_floppy;
1570                 }
1571
1572                 if (floppy->wp && (filp->f_mode & 2)) {
1573                         ret = -EROFS;
1574                         goto out_put_floppy;
1575                 }
1576                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1577                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1578                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1579                         idefloppy_create_prevent_cmd(&pc, 1);
1580                         (void) idefloppy_queue_pc_tail(drive, &pc);
1581                 }
1582                 check_disk_change(inode->i_bdev);
1583         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1584                 ret = -EBUSY;
1585                 goto out_put_floppy;
1586         }
1587         return 0;
1588
1589 out_put_floppy:
1590         floppy->openers--;
1591         ide_floppy_put(floppy);
1592         return ret;
1593 }
1594
1595 static int idefloppy_release(struct inode *inode, struct file *filp)
1596 {
1597         struct gendisk *disk = inode->i_bdev->bd_disk;
1598         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1599         ide_drive_t *drive = floppy->drive;
1600         idefloppy_pc_t pc;
1601
1602         debug_log("Reached %s\n", __func__);
1603
1604         if (floppy->openers == 1) {
1605                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1606                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1607                         idefloppy_create_prevent_cmd(&pc, 0);
1608                         (void) idefloppy_queue_pc_tail(drive, &pc);
1609                 }
1610
1611                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1612         }
1613
1614         floppy->openers--;
1615
1616         ide_floppy_put(floppy);
1617
1618         return 0;
1619 }
1620
1621 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1622 {
1623         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1624         ide_drive_t *drive = floppy->drive;
1625
1626         geo->heads = drive->bios_head;
1627         geo->sectors = drive->bios_sect;
1628         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1629         return 0;
1630 }
1631
1632 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1633                                unsigned long arg, unsigned int cmd)
1634 {
1635         if (floppy->openers > 1)
1636                 return -EBUSY;
1637
1638         /* The IOMEGA Clik! Drive doesn't support this command -
1639          * no room for an eject mechanism */
1640         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1641                 int prevent = arg ? 1 : 0;
1642
1643                 if (cmd == CDROMEJECT)
1644                         prevent = 0;
1645
1646                 idefloppy_create_prevent_cmd(pc, prevent);
1647                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1648         }
1649
1650         if (cmd == CDROMEJECT) {
1651                 idefloppy_create_start_stop_cmd(pc, 2);
1652                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1653         }
1654
1655         return 0;
1656 }
1657
1658 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1659                                   int __user *arg)
1660 {
1661         int blocks, length, flags, err = 0;
1662         idefloppy_pc_t pc;
1663
1664         if (floppy->openers > 1) {
1665                 /* Don't format if someone is using the disk */
1666                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1667                 return -EBUSY;
1668         }
1669
1670         set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1671
1672         /*
1673          * Send ATAPI_FORMAT_UNIT to the drive.
1674          *
1675          * Userland gives us the following structure:
1676          *
1677          * struct idefloppy_format_command {
1678          *        int nblocks;
1679          *        int blocksize;
1680          *        int flags;
1681          *        } ;
1682          *
1683          * flags is a bitmask, currently, the only defined flag is:
1684          *
1685          *        0x01 - verify media after format.
1686          */
1687         if (get_user(blocks, arg) ||
1688                         get_user(length, arg+1) ||
1689                         get_user(flags, arg+2)) {
1690                 err = -EFAULT;
1691                 goto out;
1692         }
1693
1694         (void) idefloppy_get_sfrp_bit(floppy->drive);
1695         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1696
1697         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1698                 err = -EIO;
1699
1700 out:
1701         if (err)
1702                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1703         return err;
1704 }
1705
1706
1707 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1708                         unsigned int cmd, unsigned long arg)
1709 {
1710         struct block_device *bdev = inode->i_bdev;
1711         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1712         ide_drive_t *drive = floppy->drive;
1713         idefloppy_pc_t pc;
1714         void __user *argp = (void __user *)arg;
1715         int err;
1716
1717         switch (cmd) {
1718         case CDROMEJECT:
1719                 /* fall through */
1720         case CDROM_LOCKDOOR:
1721                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1722         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1723                 return 0;
1724         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1725                 return ide_floppy_get_format_capacities(drive, argp);
1726         case IDEFLOPPY_IOCTL_FORMAT_START:
1727                 if (!(file->f_mode & 2))
1728                         return -EPERM;
1729
1730                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1731         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1732                 return idefloppy_get_format_progress(drive, argp);
1733         }
1734
1735         /*
1736          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1737          * and CDROM_SEND_PACKET (legacy) ioctls
1738          */
1739         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1740                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1741                                         bdev->bd_disk, cmd, argp);
1742         else
1743                 err = -ENOTTY;
1744
1745         if (err == -ENOTTY)
1746                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1747
1748         return err;
1749 }
1750
1751 static int idefloppy_media_changed(struct gendisk *disk)
1752 {
1753         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1754         ide_drive_t *drive = floppy->drive;
1755
1756         /* do not scan partitions twice if this is a removable device */
1757         if (drive->attach) {
1758                 drive->attach = 0;
1759                 return 0;
1760         }
1761         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1762 }
1763
1764 static int idefloppy_revalidate_disk(struct gendisk *disk)
1765 {
1766         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1767         set_capacity(disk, idefloppy_capacity(floppy->drive));
1768         return 0;
1769 }
1770
1771 static struct block_device_operations idefloppy_ops = {
1772         .owner          = THIS_MODULE,
1773         .open           = idefloppy_open,
1774         .release        = idefloppy_release,
1775         .ioctl          = idefloppy_ioctl,
1776         .getgeo         = idefloppy_getgeo,
1777         .media_changed  = idefloppy_media_changed,
1778         .revalidate_disk= idefloppy_revalidate_disk
1779 };
1780
1781 static int ide_floppy_probe(ide_drive_t *drive)
1782 {
1783         idefloppy_floppy_t *floppy;
1784         struct gendisk *g;
1785
1786         if (!strstr("ide-floppy", drive->driver_req))
1787                 goto failed;
1788         if (!drive->present)
1789                 goto failed;
1790         if (drive->media != ide_floppy)
1791                 goto failed;
1792         if (!idefloppy_identify_device (drive, drive->id)) {
1793                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1794                 goto failed;
1795         }
1796         if (drive->scsi) {
1797                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1798                 goto failed;
1799         }
1800         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1801                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1802                 goto failed;
1803         }
1804
1805         g = alloc_disk(1 << PARTN_BITS);
1806         if (!g)
1807                 goto out_free_floppy;
1808
1809         ide_init_disk(g, drive);
1810
1811         ide_proc_register_driver(drive, &idefloppy_driver);
1812
1813         kref_init(&floppy->kref);
1814
1815         floppy->drive = drive;
1816         floppy->driver = &idefloppy_driver;
1817         floppy->disk = g;
1818
1819         g->private_data = &floppy->driver;
1820
1821         drive->driver_data = floppy;
1822
1823         idefloppy_setup (drive, floppy);
1824
1825         g->minors = 1 << PARTN_BITS;
1826         g->driverfs_dev = &drive->gendev;
1827         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1828         g->fops = &idefloppy_ops;
1829         drive->attach = 1;
1830         add_disk(g);
1831         return 0;
1832
1833 out_free_floppy:
1834         kfree(floppy);
1835 failed:
1836         return -ENODEV;
1837 }
1838
1839 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1840
1841 static void __exit idefloppy_exit (void)
1842 {
1843         driver_unregister(&idefloppy_driver.gen_driver);
1844 }
1845
1846 static int __init idefloppy_init(void)
1847 {
1848         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1849         return driver_register(&idefloppy_driver.gen_driver);
1850 }
1851
1852 MODULE_ALIAS("ide:*m-floppy*");
1853 module_init(idefloppy_init);
1854 module_exit(idefloppy_exit);
1855 MODULE_LICENSE("GPL");