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 typedef void (io_buf_t)(ide_drive_t *, idefloppy_pc_t *, unsigned int);
 520
 521 /* The usual interrupt handler called during a packet command. */
 522 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 523 {
 524         idefloppy_floppy_t *floppy = drive->driver_data;
 525         ide_hwif_t *hwif = drive->hwif;
 526         idefloppy_pc_t *pc = floppy->pc;
 527         struct request *rq = pc->rq;
 528         xfer_func_t *xferfunc;
 529         io_buf_t *iobuf_func;
 530         unsigned int temp;
 531         int dma_error = 0;
 532         u16 bcount;
 533         u8 stat, ireason;
 534
 535         debug_log("Reached %s interrupt handler\n", __func__);
 536
 537         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 538                 dma_error = hwif->ide_dma_end(drive);
 539                 if (dma_error) {
 540                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 541                                         rq_data_dir(rq) ? "write" : "read");
 542                         set_bit(PC_DMA_ERROR, &pc->flags);
 543                 } else {
 544                         pc->actually_transferred = pc->request_transfer;
 545                         idefloppy_update_buffers(drive, pc);
 546                 }
 547                 debug_log("DMA finished\n");
 548         }
 549
 550         /* Clear the interrupt */
 551         stat = drive->hwif->INB(IDE_STATUS_REG);
 552
 553         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 554                 debug_log("Packet command completed, %d bytes transferred\n",
 555                                 pc->actually_transferred);
 556                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 557
 558                 local_irq_enable_in_hardirq();
 559
 560                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 561                         /* Error detected */
 562                         debug_log("%s: I/O error\n", drive->name);
 563                         rq->errors++;
 564                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 565                                 printk(KERN_ERR "ide-floppy: I/O error in "
 566                                         "request sense command\n");
 567                                 return ide_do_reset(drive);
 568                         }
 569                         /* Retry operation */
 570                         idefloppy_retry_pc(drive);
 571                         /* queued, but not started */
 572                         return ide_stopped;
 573                 }
 574                 pc->error = 0;
 575                 if (floppy->failed_pc == pc)
 576                         floppy->failed_pc = NULL;
 577                 /* Command finished - Call the callback function */
 578                 pc->callback(drive);
 579                 return ide_stopped;
 580         }
 581
 582         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 583                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 584                         "more interrupts in DMA mode\n");
 585                 ide_dma_off(drive);
 586                 return ide_do_reset(drive);
 587         }
 588
 589         /* Get the number of bytes to transfer */
 590         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 591                   hwif->INB(IDE_BCOUNTL_REG);
 592         /* on this interrupt */
 593         ireason = hwif->INB(IDE_IREASON_REG);
 594
 595         if (ireason & CD) {
 596                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 597                 return ide_do_reset(drive);
 598         }
 599         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 600                 /* Hopefully, we will never get here */
 601                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 602                                 (ireason & IO) ? "Write" : "Read");
 603                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 604                                 (ireason & IO) ? "Read" : "Write");
 605                 return ide_do_reset(drive);
 606         }
 607         if (!test_bit(PC_WRITING, &pc->flags)) {
 608                 /* Reading - Check that we have enough space */
 609                 temp = pc->actually_transferred + bcount;
 610                 if (temp > pc->request_transfer) {
 611                         if (temp > pc->buffer_size) {
 612                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 613                                         "to send us more data than expected "
 614                                         "- discarding data\n");
 615                                 idefloppy_discard_data(drive, bcount);
 616
 617                                 ide_set_handler(drive,
 618                                                 &idefloppy_pc_intr,
 619                                                 IDEFLOPPY_WAIT_CMD,
 620                                                 NULL);
 621                                 return ide_started;
 622                         }
 623                         debug_log("The floppy wants to send us more data than"
 624                                         " expected - allowing transfer\n");
 625                 }
 626         }
 627         if (test_bit(PC_WRITING, &pc->flags)) {
 628                 xferfunc = hwif->atapi_output_bytes;
 629                 iobuf_func = &idefloppy_output_buffers;
 630         } else {
 631                 xferfunc = hwif->atapi_input_bytes;
 632                 iobuf_func = &idefloppy_input_buffers;
 633         }
 634
 635         if (pc->buffer)
 636                 xferfunc(drive, pc->current_position, bcount);
 637         else
 638                 iobuf_func(drive, pc, bcount);
 639
 640         /* Update the current position */
 641         pc->actually_transferred += bcount;
 642         pc->current_position += bcount;
 643
 644         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 645         return ide_started;
 646 }
 647
 648 /*
 649  * This is the original routine that did the packet transfer.
 650  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 651  * for that drive below. The algorithm is chosen based on drive type
 652  */
 653 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 654 {
 655         ide_startstop_t startstop;
 656         idefloppy_floppy_t *floppy = drive->driver_data;
 657         u8 ireason;
 658
 659         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 660                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 661                                 "initiated yet DRQ isn't asserted\n");
 662                 return startstop;
 663         }
 664         ireason = drive->hwif->INB(IDE_IREASON_REG);
 665         if ((ireason & CD) == 0 || (ireason & IO)) {
 666                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 667                                 "issuing a packet command\n");
 668                 return ide_do_reset(drive);
 669         }
 670
 671         /* Set the interrupt routine */
 672         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 673         /* Send the actual packet */
 674         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 675         return ide_started;
 676 }
 677
 678
 679 /*
 680  * What we have here is a classic case of a top half / bottom half
 681  * interrupt service routine. In interrupt mode, the device sends
 682  * an interrupt to signal it's ready to receive a packet. However,
 683  * we need to delay about 2-3 ticks before issuing the packet or we
 684  * gets in trouble.
 685  *
 686  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 687  * directly). In either case, when the device says it's ready for a
 688  * packet, we schedule the packet transfer to occur about 2-3 ticks
 689  * later in transfer_pc2.
 690  */
 691 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 692 {
 693         idefloppy_floppy_t *floppy = drive->driver_data;
 694
 695         /* Send the actual packet */
 696         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 697         /* Timeout for the packet command */
 698         return IDEFLOPPY_WAIT_CMD;
 699 }
 700
 701 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 702 {
 703         idefloppy_floppy_t *floppy = drive->driver_data;
 704         ide_startstop_t startstop;
 705         u8 ireason;
 706
 707         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 708                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 709                                 "initiated yet DRQ isn't asserted\n");
 710                 return startstop;
 711         }
 712         ireason = drive->hwif->INB(IDE_IREASON_REG);
 713         if ((ireason & CD) == 0 || (ireason & IO)) {
 714                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 715                                 "while issuing a packet command\n");
 716                 return ide_do_reset(drive);
 717         }
 718         /*
 719          * The following delay solves a problem with ATAPI Zip 100 drives
 720          * where the Busy flag was apparently being deasserted before the
 721          * unit was ready to receive data. This was happening on a
 722          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 723          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 724          * used until after the packet is moved in about 50 msec.
 725          */
 726
 727         ide_set_handler(drive,
 728           &idefloppy_pc_intr,           /* service routine for packet command */
 729           floppy->ticks,                /* wait this long before "failing" */
 730           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 731         return ide_started;
 732 }
 733
 734 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 735                                     idefloppy_pc_t *pc)
 736 {
 737         /* supress error messages resulting from Medium not present */
 738         if (floppy->sense_key == 0x02 &&
 739             floppy->asc       == 0x3a &&
 740             floppy->ascq      == 0x00)
 741                 return;
 742
 743         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 744                         "asc = %2x, ascq = %2x\n",
 745                         floppy->drive->name, pc->c[0], floppy->sense_key,
 746                         floppy->asc, floppy->ascq);
 747
 748 }
 749
 750 /*
 751  *      Issue a packet command
 752  */
 753 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 754 {
 755         idefloppy_floppy_t *floppy = drive->driver_data;
 756         ide_hwif_t *hwif = drive->hwif;
 757         ide_handler_t *pkt_xfer_routine;
 758         u16 bcount;
 759         u8 dma;
 760
 761         if (floppy->failed_pc == NULL &&
 762             pc->c[0] != GPCMD_REQUEST_SENSE)
 763                 floppy->failed_pc = pc;
 764         /* Set the current packet command */
 765         floppy->pc = pc;
 766
 767         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
 768             test_bit(PC_ABORT, &pc->flags)) {
 769                 /*
 770                  *      We will "abort" retrying a packet command in case
 771                  *      a legitimate error code was received.
 772                  */
 773                 if (!test_bit(PC_ABORT, &pc->flags)) {
 774                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
 775                                 ide_floppy_report_error(floppy, pc);
 776                         /* Giving up */
 777                         pc->error = IDEFLOPPY_ERROR_GENERAL;
 778                 }
 779                 floppy->failed_pc = NULL;
 780                 pc->callback(drive);
 781                 return ide_stopped;
 782         }
 783
 784         debug_log("Retry number - %d\n", pc->retries);
 785
 786         pc->retries++;
 787         /* We haven't transferred any data yet */
 788         pc->actually_transferred = 0;
 789         pc->current_position = pc->buffer;
 790         bcount = min(pc->request_transfer, 63 * 1024);
 791
 792         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 793                 ide_dma_off(drive);
 794
 795         dma = 0;
 796
 797         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 798                 dma = !hwif->dma_setup(drive);
 799
 800         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 801                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 802
 803         if (dma) {      /* Begin DMA, if necessary */
 804                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 805                 hwif->dma_start(drive);
 806         }
 807
 808         /* Can we transfer the packet when we get the interrupt or wait? */
 809         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
 810                 /* wait */
 811                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 812         } else {
 813                 /* immediate */
 814                 pkt_xfer_routine = &idefloppy_transfer_pc;
 815         }
 816
 817         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
 818                 /* Issue the packet command */
 819                 ide_execute_command(drive, WIN_PACKETCMD,
 820                                 pkt_xfer_routine,
 821                                 IDEFLOPPY_WAIT_CMD,
 822                                 NULL);
 823                 return ide_started;
 824         } else {
 825                 /* Issue the packet command */
 826                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 827                 return (*pkt_xfer_routine) (drive);
 828         }
 829 }
 830
 831 static void idefloppy_rw_callback (ide_drive_t *drive)
 832 {
 833         debug_log("Reached %s\n", __func__);
 834
 835         idefloppy_do_end_request(drive, 1, 0);
 836         return;
 837 }
 838
 839 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 840 {
 841         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 842
 843         idefloppy_init_pc(pc);
 844         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 845         pc->c[4] = prevent;
 846 }
 847
 848 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 849 {
 850         idefloppy_init_pc(pc);
 851         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 852         pc->c[7] = 255;
 853         pc->c[8] = 255;
 854         pc->request_transfer = 255;
 855 }
 856
 857 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 858                                               int flags)
 859 {
 860         idefloppy_init_pc(pc);
 861         pc->c[0] = GPCMD_FORMAT_UNIT;
 862         pc->c[1] = 0x17;
 863
 864         memset(pc->buffer, 0, 12);
 865         pc->buffer[1] = 0xA2;
 866         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 867
 868         if (flags & 1)                          /* Verify bit on... */
 869                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 870         pc->buffer[3] = 8;
 871
 872         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 873         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 874         pc->buffer_size=12;
 875         set_bit(PC_WRITING, &pc->flags);
 876 }
 877
 878 /*
 879  *      A mode sense command is used to "sense" floppy parameters.
 880  */
 881 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 882 {
 883         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 884
 885         idefloppy_init_pc(pc);
 886         pc->c[0] = GPCMD_MODE_SENSE_10;
 887         pc->c[1] = 0;
 888         pc->c[2] = page_code + (type << 6);
 889
 890         switch (page_code) {
 891                 case IDEFLOPPY_CAPABILITIES_PAGE:
 892                         length += 12;
 893                         break;
 894                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 895                         length += 32;
 896                         break;
 897                 default:
 898                         printk(KERN_ERR "ide-floppy: unsupported page code "
 899                                 "in create_mode_sense_cmd\n");
 900         }
 901         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 902         pc->request_transfer = length;
 903 }
 904
 905 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 906 {
 907         idefloppy_init_pc(pc);
 908         pc->c[0] = GPCMD_START_STOP_UNIT;
 909         pc->c[4] = start;
 910 }
 911
 912 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 913 {
 914         idefloppy_init_pc(pc);
 915         pc->c[0] = GPCMD_TEST_UNIT_READY;
 916 }
 917
 918 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
 919 {
 920         int block = sector / floppy->bs_factor;
 921         int blocks = rq->nr_sectors / floppy->bs_factor;
 922         int cmd = rq_data_dir(rq);
 923
 924         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
 925                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
 926                 block, blocks);
 927
 928         idefloppy_init_pc(pc);
 929         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
 930                 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12;
 931                 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]);
 932         } else {
 933                 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 934                 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 935         }
 936         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 937         pc->callback = &idefloppy_rw_callback;
 938         pc->rq = rq;
 939         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 940         if (rq->cmd_flags & REQ_RW)
 941                 set_bit(PC_WRITING, &pc->flags);
 942         pc->buffer = NULL;
 943         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 944         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 945 }
 946
 947 static void
 948 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 949 {
 950         idefloppy_init_pc(pc);
 951         pc->callback = &idefloppy_rw_callback;
 952         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 953         pc->rq = rq;
 954         pc->b_count = rq->data_len;
 955         if (rq->data_len && rq_data_dir(rq) == WRITE)
 956                 set_bit(PC_WRITING, &pc->flags);
 957         pc->buffer = rq->data;
 958         if (rq->bio)
 959                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 960
 961         /*
 962          * possibly problematic, doesn't look like ide-floppy correctly
 963          * handled scattered requests if dma fails...
 964          */
 965         pc->request_transfer = pc->buffer_size = rq->data_len;
 966 }
 967
 968 /*
 969  *      idefloppy_do_request is our request handling function.
 970  */
 971 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
 972 {
 973         idefloppy_floppy_t *floppy = drive->driver_data;
 974         idefloppy_pc_t *pc;
 975         unsigned long block = (unsigned long)block_s;
 976
 977         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 978                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 979                         rq->cmd_type, rq->errors);
 980         debug_log("sector: %ld, nr_sectors: %ld, "
 981                         "current_nr_sectors: %d\n", (long)rq->sector,
 982                         rq->nr_sectors, rq->current_nr_sectors);
 983
 984         if (rq->errors >= ERROR_MAX) {
 985                 if (floppy->failed_pc)
 986                         ide_floppy_report_error(floppy, floppy->failed_pc);
 987                 else
 988                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 989                                 drive->name);
 990                 idefloppy_do_end_request(drive, 0, 0);
 991                 return ide_stopped;
 992         }
 993         if (blk_fs_request(rq)) {
 994                 if (((long)rq->sector % floppy->bs_factor) ||
 995                     (rq->nr_sectors % floppy->bs_factor)) {
 996                         printk("%s: unsupported r/w request size\n",
 997                                 drive->name);
 998                         idefloppy_do_end_request(drive, 0, 0);
 999                         return ide_stopped;
1000                 }
1001                 pc = idefloppy_next_pc_storage(drive);
1002                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1003         } else if (blk_special_request(rq)) {
1004                 pc = (idefloppy_pc_t *) rq->buffer;
1005         } else if (blk_pc_request(rq)) {
1006                 pc = idefloppy_next_pc_storage(drive);
1007                 idefloppy_blockpc_cmd(floppy, pc, rq);
1008         } else {
1009                 blk_dump_rq_flags(rq,
1010                         "ide-floppy: unsupported command in queue");
1011                 idefloppy_do_end_request(drive, 0, 0);
1012                 return ide_stopped;
1013         }
1014
1015         pc->rq = rq;
1016         return idefloppy_issue_pc(drive, pc);
1017 }
1018
1019 /*
1020  *      idefloppy_queue_pc_tail adds a special packet command request to the
1021  *      tail of the request queue, and waits for it to be serviced.
1022  */
1023 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1024 {
1025         struct ide_floppy_obj *floppy = drive->driver_data;
1026         struct request rq;
1027
1028         ide_init_drive_cmd (&rq);
1029         rq.buffer = (char *) pc;
1030         rq.cmd_type = REQ_TYPE_SPECIAL;
1031         rq.rq_disk = floppy->disk;
1032
1033         return ide_do_drive_cmd(drive, &rq, ide_wait);
1034 }
1035
1036 /*
1037  * Look at the flexible disk page parameters. We ignore the CHS capacity
1038  * parameters and use the LBA parameters instead.
1039  */
1040 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1041 {
1042         idefloppy_floppy_t *floppy = drive->driver_data;
1043         idefloppy_pc_t pc;
1044         u8 *page;
1045         int capacity, lba_capacity;
1046         u16 transfer_rate, sector_size, cyls, rpm;
1047         u8 heads, sectors;
1048
1049         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1050                                         MODE_SENSE_CURRENT);
1051
1052         if (idefloppy_queue_pc_tail(drive, &pc)) {
1053                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1054                                 " parameters\n");
1055                 return 1;
1056         }
1057         floppy->wp = !!(pc.buffer[3] & 0x80);
1058         set_disk_ro(floppy->disk, floppy->wp);
1059         page = &pc.buffer[8];
1060
1061         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1062         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1063         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1064         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1065         heads         = pc.buffer[8 + 4];
1066         sectors       = pc.buffer[8 + 5];
1067
1068         capacity = cyls * heads * sectors * sector_size;
1069
1070         if (memcmp(page, &floppy->flexible_disk_page, 32))
1071                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1072                                 "%d sector size, %d rpm\n",
1073                                 drive->name, capacity / 1024, cyls, heads,
1074                                 sectors, transfer_rate / 8, sector_size, rpm);
1075
1076         memcpy(&floppy->flexible_disk_page, page, 32);
1077         drive->bios_cyl = cyls;
1078         drive->bios_head = heads;
1079         drive->bios_sect = sectors;
1080         lba_capacity = floppy->blocks * floppy->block_size;
1081
1082         if (capacity < lba_capacity) {
1083                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1084                         "bytes, but the drive only handles %d\n",
1085                         drive->name, lba_capacity, capacity);
1086                 floppy->blocks = floppy->block_size ?
1087                         capacity / floppy->block_size : 0;
1088         }
1089         return 0;
1090 }
1091
1092 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1093 {
1094         idefloppy_floppy_t *floppy = drive->driver_data;
1095         idefloppy_pc_t pc;
1096
1097         floppy->srfp = 0;
1098         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1099                                                  MODE_SENSE_CURRENT);
1100
1101         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1102         if (idefloppy_queue_pc_tail(drive, &pc))
1103                 return 1;
1104
1105         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1106         return (0);
1107 }
1108
1109 /*
1110  * Determine if a media is present in the floppy drive, and if so, its LBA
1111  * capacity.
1112  */
1113 static int ide_floppy_get_capacity(ide_drive_t *drive)
1114 {
1115         idefloppy_floppy_t *floppy = drive->driver_data;
1116         idefloppy_pc_t pc;
1117         u8 *cap_desc;
1118         u8 header_len, desc_cnt;
1119         int i, rc = 1, blocks, length;
1120
1121         drive->bios_cyl = 0;
1122         drive->bios_head = drive->bios_sect = 0;
1123         floppy->blocks = 0;
1124         floppy->bs_factor = 1;
1125         set_capacity(floppy->disk, 0);
1126
1127         idefloppy_create_read_capacity_cmd(&pc);
1128         if (idefloppy_queue_pc_tail(drive, &pc)) {
1129                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1130                 return 1;
1131         }
1132         header_len = pc.buffer[3];
1133         cap_desc = &pc.buffer[4];
1134         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1135
1136         for (i = 0; i < desc_cnt; i++) {
1137                 unsigned int desc_start = 4 + i*8;
1138
1139                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1140                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1141
1142                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1143                                 i, blocks * length / 1024, blocks, length);
1144
1145                 if (i)
1146                         continue;
1147                 /*
1148                  * the code below is valid only for the 1st descriptor, ie i=0
1149                  */
1150
1151                 switch (pc.buffer[desc_start + 4] & 0x03) {
1152                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1153                 case CAPACITY_UNFORMATTED:
1154                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1155                                 /*
1156                                  * If it is not a clik drive, break out
1157                                  * (maintains previous driver behaviour)
1158                                  */
1159                                 break;
1160                 case CAPACITY_CURRENT:
1161                         /* Normal Zip/LS-120 disks */
1162                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1163                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1164                                         "sector size\n", drive->name,
1165                                         blocks * length / 1024, blocks, length);
1166                         memcpy(&floppy->cap_desc, cap_desc, 8);
1167
1168                         if (!length || length % 512) {
1169                                 printk(KERN_NOTICE "%s: %d bytes block size "
1170                                         "not supported\n", drive->name, length);
1171                         } else {
1172                                 floppy->blocks = blocks;
1173                                 floppy->block_size = length;
1174                                 floppy->bs_factor = length / 512;
1175                                 if (floppy->bs_factor != 1)
1176                                         printk(KERN_NOTICE "%s: warning: non "
1177                                                 "512 bytes block size not "
1178                                                 "fully supported\n",
1179                                                 drive->name);
1180                                 rc = 0;
1181                         }
1182                         break;
1183                 case CAPACITY_NO_CARTRIDGE:
1184                         /*
1185                          * This is a KERN_ERR so it appears on screen
1186                          * for the user to see
1187                          */
1188                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1189                         break;
1190                 case CAPACITY_INVALID:
1191                         printk(KERN_ERR "%s: Invalid capacity for disk "
1192                                 "in drive\n", drive->name);
1193                         break;
1194                 }
1195                 debug_log("Descriptor 0 Code: %d\n",
1196                           pc.buffer[desc_start + 4] & 0x03);
1197         }
1198
1199         /* Clik! disk does not support get_flexible_disk_page */
1200         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1201                 (void) ide_floppy_get_flexible_disk_page(drive);
1202
1203         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1204         return rc;
1205 }
1206
1207 /*
1208  * Obtain the list of formattable capacities.
1209  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1210  * descriptors to userland, instead of our own structures.
1211  *
1212  * Userland gives us the following structure:
1213  *
1214  * struct idefloppy_format_capacities {
1215  *      int nformats;
1216  *      struct {
1217  *              int nblocks;
1218  *              int blocksize;
1219  *      } formats[];
1220  * };
1221  *
1222  * userland initializes nformats to the number of allocated formats[] records.
1223  * On exit we set nformats to the number of records we've actually initialized.
1224  */
1225
1226 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1227 {
1228         idefloppy_pc_t pc;
1229         u8 header_len, desc_cnt;
1230         int i, blocks, length, u_array_size, u_index;
1231         int __user *argp;
1232
1233         if (get_user(u_array_size, arg))
1234                 return (-EFAULT);
1235
1236         if (u_array_size <= 0)
1237                 return (-EINVAL);
1238
1239         idefloppy_create_read_capacity_cmd(&pc);
1240         if (idefloppy_queue_pc_tail(drive, &pc)) {
1241                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1242                 return (-EIO);
1243         }
1244         header_len = pc.buffer[3];
1245         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1246
1247         u_index = 0;
1248         argp = arg + 1;
1249
1250         /*
1251          * We always skip the first capacity descriptor.  That's the current
1252          * capacity.  We are interested in the remaining descriptors, the
1253          * formattable capacities.
1254          */
1255         for (i = 1; i < desc_cnt; i++) {
1256                 unsigned int desc_start = 4 + i*8;
1257
1258                 if (u_index >= u_array_size)
1259                         break;  /* User-supplied buffer too small */
1260
1261                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1262                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1263
1264                 if (put_user(blocks, argp))
1265                         return(-EFAULT);
1266                 ++argp;
1267
1268                 if (put_user(length, argp))
1269                         return (-EFAULT);
1270                 ++argp;
1271
1272                 ++u_index;
1273         }
1274
1275         if (put_user(u_index, arg))
1276                 return (-EFAULT);
1277         return (0);
1278 }
1279
1280 /*
1281 ** Get ATAPI_FORMAT_UNIT progress indication.
1282 **
1283 ** Userland gives a pointer to an int.  The int is set to a progress
1284 ** indicator 0-65536, with 65536=100%.
1285 **
1286 ** If the drive does not support format progress indication, we just check
1287 ** the dsc bit, and return either 0 or 65536.
1288 */
1289
1290 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1291 {
1292         idefloppy_floppy_t *floppy = drive->driver_data;
1293         idefloppy_pc_t pc;
1294         int progress_indication = 0x10000;
1295
1296         if (floppy->srfp) {
1297                 idefloppy_create_request_sense_cmd(&pc);
1298                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1299                         return (-EIO);
1300                 }
1301
1302                 if (floppy->sense_key == 2 &&
1303                     floppy->asc == 4 &&
1304                     floppy->ascq == 4) {
1305                         progress_indication = floppy->progress_indication;
1306                 }
1307                 /* Else assume format_unit has finished, and we're
1308                 ** at 0x10000 */
1309         } else {
1310                 unsigned long flags;
1311                 u8 stat;
1312
1313                 local_irq_save(flags);
1314                 stat = drive->hwif->INB(IDE_STATUS_REG);
1315                 local_irq_restore(flags);
1316
1317                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1318         }
1319         if (put_user(progress_indication, arg))
1320                 return (-EFAULT);
1321
1322         return (0);
1323 }
1324
1325 /*
1326  *      Return the current floppy capacity.
1327  */
1328 static sector_t idefloppy_capacity (ide_drive_t *drive)
1329 {
1330         idefloppy_floppy_t *floppy = drive->driver_data;
1331         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1332
1333         return capacity;
1334 }
1335
1336 /*
1337  *      idefloppy_identify_device checks if we can support a drive,
1338  *      based on the ATAPI IDENTIFY command results.
1339  */
1340 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1341 {
1342         struct idefloppy_id_gcw gcw;
1343 #if IDEFLOPPY_DEBUG_INFO
1344         char buffer[80];
1345 #endif /* IDEFLOPPY_DEBUG_INFO */
1346
1347         *((u16 *) &gcw) = id->config;
1348
1349 #ifdef CONFIG_PPC
1350         /* kludge for Apple PowerBook internal zip */
1351         if ((gcw.device_type == 5) &&
1352             !strstr(id->model, "CD-ROM") &&
1353             strstr(id->model, "ZIP"))
1354                 gcw.device_type = 0;
1355 #endif
1356
1357 #if IDEFLOPPY_DEBUG_INFO
1358         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1359         switch (gcw.protocol) {
1360                 case 0: case 1: sprintf(buffer, "ATA");break;
1361                 case 2: sprintf(buffer, "ATAPI");break;
1362                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1363         }
1364         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1365         switch (gcw.device_type) {
1366                 case 0: sprintf(buffer, "Direct-access Device");break;
1367                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1368                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1369                 case 5: sprintf(buffer, "CD-ROM Device");break;
1370                 case 6: sprintf(buffer, "Reserved");
1371                 case 7: sprintf(buffer, "Optical memory Device");break;
1372                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1373                 default: sprintf(buffer, "Reserved");
1374         }
1375         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1376         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1377         switch (gcw.drq_type) {
1378                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1379                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1380                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1381                 case 3: sprintf(buffer, "Reserved");break;
1382         }
1383         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1384         switch (gcw.packet_size) {
1385                 case 0: sprintf(buffer, "12 bytes");break;
1386                 case 1: sprintf(buffer, "16 bytes");break;
1387                 default: sprintf(buffer, "Reserved");break;
1388         }
1389         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1390 #endif /* IDEFLOPPY_DEBUG_INFO */
1391
1392         if (gcw.protocol != 2)
1393                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1394         else if (gcw.device_type != 0)
1395                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1396         else if (!gcw.removable)
1397                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1398         else if (gcw.drq_type == 3) {
1399                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1400         } else if (gcw.packet_size != 0) {
1401                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1402         } else
1403                 return 1;
1404         return 0;
1405 }
1406
1407 #ifdef CONFIG_IDE_PROC_FS
1408 static void idefloppy_add_settings(ide_drive_t *drive)
1409 {
1410         idefloppy_floppy_t *floppy = drive->driver_data;
1411
1412 /*
1413  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1414  */
1415         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1416         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1417         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1418         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1419 }
1420 #else
1421 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1422 #endif
1423
1424 /*
1425  *      Driver initialization.
1426  */
1427 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1428 {
1429         struct idefloppy_id_gcw gcw;
1430
1431         *((u16 *) &gcw) = drive->id->config;
1432         floppy->pc = floppy->pc_stack;
1433         if (gcw.drq_type == 1)
1434                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1435         /*
1436          *      We used to check revisions here. At this point however
1437          *      I'm giving up. Just assume they are all broken, its easier.
1438          *
1439          *      The actual reason for the workarounds was likely
1440          *      a driver bug after all rather than a firmware bug,
1441          *      and the workaround below used to hide it. It should
1442          *      be fixed as of version 1.9, but to be on the safe side
1443          *      we'll leave the limitation below for the 2.2.x tree.
1444          */
1445
1446         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1447                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1448                 /* This value will be visible in the /proc/ide/hdx/settings */
1449                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1450                 blk_queue_max_sectors(drive->queue, 64);
1451         }
1452
1453         /*
1454         *      Guess what?  The IOMEGA Clik! drive also needs the
1455         *      above fix.  It makes nasty clicking noises without
1456         *      it, so please don't remove this.
1457         */
1458         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1459                 blk_queue_max_sectors(drive->queue, 64);
1460                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1461         }
1462
1463
1464         (void) ide_floppy_get_capacity(drive);
1465         idefloppy_add_settings(drive);
1466 }
1467
1468 static void ide_floppy_remove(ide_drive_t *drive)
1469 {
1470         idefloppy_floppy_t *floppy = drive->driver_data;
1471         struct gendisk *g = floppy->disk;
1472
1473         ide_proc_unregister_driver(drive, floppy->driver);
1474
1475         del_gendisk(g);
1476
1477         ide_floppy_put(floppy);
1478 }
1479
1480 static void idefloppy_cleanup_obj(struct kref *kref)
1481 {
1482         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1483         ide_drive_t *drive = floppy->drive;
1484         struct gendisk *g = floppy->disk;
1485
1486         drive->driver_data = NULL;
1487         g->private_data = NULL;
1488         put_disk(g);
1489         kfree(floppy);
1490 }
1491
1492 #ifdef CONFIG_IDE_PROC_FS
1493 static int proc_idefloppy_read_capacity
1494         (char *page, char **start, off_t off, int count, int *eof, void *data)
1495 {
1496         ide_drive_t*drive = (ide_drive_t *)data;
1497         int len;
1498
1499         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1500         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1501 }
1502
1503 static ide_proc_entry_t idefloppy_proc[] = {
1504         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1505         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1506         { NULL, 0, NULL, NULL }
1507 };
1508 #endif  /* CONFIG_IDE_PROC_FS */
1509
1510 static int ide_floppy_probe(ide_drive_t *);
1511
1512 static ide_driver_t idefloppy_driver = {
1513         .gen_driver = {
1514                 .owner          = THIS_MODULE,
1515                 .name           = "ide-floppy",
1516                 .bus            = &ide_bus_type,
1517         },
1518         .probe                  = ide_floppy_probe,
1519         .remove                 = ide_floppy_remove,
1520         .version                = IDEFLOPPY_VERSION,
1521         .media                  = ide_floppy,
1522         .supports_dsc_overlap   = 0,
1523         .do_request             = idefloppy_do_request,
1524         .end_request            = idefloppy_do_end_request,
1525         .error                  = __ide_error,
1526         .abort                  = __ide_abort,
1527 #ifdef CONFIG_IDE_PROC_FS
1528         .proc                   = idefloppy_proc,
1529 #endif
1530 };
1531
1532 static int idefloppy_open(struct inode *inode, struct file *filp)
1533 {
1534         struct gendisk *disk = inode->i_bdev->bd_disk;
1535         struct ide_floppy_obj *floppy;
1536         ide_drive_t *drive;
1537         idefloppy_pc_t pc;
1538         int ret = 0;
1539
1540         debug_log("Reached %s\n", __func__);
1541
1542         if (!(floppy = ide_floppy_get(disk)))
1543                 return -ENXIO;
1544
1545         drive = floppy->drive;
1546
1547         floppy->openers++;
1548
1549         if (floppy->openers == 1) {
1550                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1551                 /* Just in case */
1552
1553                 idefloppy_create_test_unit_ready_cmd(&pc);
1554                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1555                         idefloppy_create_start_stop_cmd(&pc, 1);
1556                         (void) idefloppy_queue_pc_tail(drive, &pc);
1557                 }
1558
1559                 if (ide_floppy_get_capacity(drive)
1560                    && (filp->f_flags & O_NDELAY) == 0
1561                     /*
1562                     ** Allow O_NDELAY to open a drive without a disk, or with
1563                     ** an unreadable disk, so that we can get the format
1564                     ** capacity of the drive or begin the format - Sam
1565                     */
1566                     ) {
1567                         ret = -EIO;
1568                         goto out_put_floppy;
1569                 }
1570
1571                 if (floppy->wp && (filp->f_mode & 2)) {
1572                         ret = -EROFS;
1573                         goto out_put_floppy;
1574                 }
1575                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1576                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1577                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1578                         idefloppy_create_prevent_cmd(&pc, 1);
1579                         (void) idefloppy_queue_pc_tail(drive, &pc);
1580                 }
1581                 check_disk_change(inode->i_bdev);
1582         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1583                 ret = -EBUSY;
1584                 goto out_put_floppy;
1585         }
1586         return 0;
1587
1588 out_put_floppy:
1589         floppy->openers--;
1590         ide_floppy_put(floppy);
1591         return ret;
1592 }
1593
1594 static int idefloppy_release(struct inode *inode, struct file *filp)
1595 {
1596         struct gendisk *disk = inode->i_bdev->bd_disk;
1597         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1598         ide_drive_t *drive = floppy->drive;
1599         idefloppy_pc_t pc;
1600
1601         debug_log("Reached %s\n", __func__);
1602
1603         if (floppy->openers == 1) {
1604                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1605                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1606                         idefloppy_create_prevent_cmd(&pc, 0);
1607                         (void) idefloppy_queue_pc_tail(drive, &pc);
1608                 }
1609
1610                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1611         }
1612
1613         floppy->openers--;
1614
1615         ide_floppy_put(floppy);
1616
1617         return 0;
1618 }
1619
1620 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1621 {
1622         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1623         ide_drive_t *drive = floppy->drive;
1624
1625         geo->heads = drive->bios_head;
1626         geo->sectors = drive->bios_sect;
1627         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1628         return 0;
1629 }
1630
1631 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1632                                unsigned long arg, unsigned int cmd)
1633 {
1634         if (floppy->openers > 1)
1635                 return -EBUSY;
1636
1637         /* The IOMEGA Clik! Drive doesn't support this command -
1638          * no room for an eject mechanism */
1639         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1640                 int prevent = arg ? 1 : 0;
1641
1642                 if (cmd == CDROMEJECT)
1643                         prevent = 0;
1644
1645                 idefloppy_create_prevent_cmd(pc, prevent);
1646                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1647         }
1648
1649         if (cmd == CDROMEJECT) {
1650                 idefloppy_create_start_stop_cmd(pc, 2);
1651                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1652         }
1653
1654         return 0;
1655 }
1656
1657 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1658                                   int __user *arg)
1659 {
1660         int blocks, length, flags, err = 0;
1661         idefloppy_pc_t pc;
1662
1663         if (floppy->openers > 1) {
1664                 /* Don't format if someone is using the disk */
1665                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1666                 return -EBUSY;
1667         }
1668
1669         set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1670
1671         /*
1672          * Send ATAPI_FORMAT_UNIT to the drive.
1673          *
1674          * Userland gives us the following structure:
1675          *
1676          * struct idefloppy_format_command {
1677          *        int nblocks;
1678          *        int blocksize;
1679          *        int flags;
1680          *        } ;
1681          *
1682          * flags is a bitmask, currently, the only defined flag is:
1683          *
1684          *        0x01 - verify media after format.
1685          */
1686         if (get_user(blocks, arg) ||
1687                         get_user(length, arg+1) ||
1688                         get_user(flags, arg+2)) {
1689                 err = -EFAULT;
1690                 goto out;
1691         }
1692
1693         (void) idefloppy_get_sfrp_bit(floppy->drive);
1694         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1695
1696         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1697                 err = -EIO;
1698
1699 out:
1700         if (err)
1701                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1702         return err;
1703 }
1704
1705
1706 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1707                         unsigned int cmd, unsigned long arg)
1708 {
1709         struct block_device *bdev = inode->i_bdev;
1710         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1711         ide_drive_t *drive = floppy->drive;
1712         idefloppy_pc_t pc;
1713         void __user *argp = (void __user *)arg;
1714         int err;
1715
1716         switch (cmd) {
1717         case CDROMEJECT:
1718                 /* fall through */
1719         case CDROM_LOCKDOOR:
1720                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1721         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1722                 return 0;
1723         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1724                 return ide_floppy_get_format_capacities(drive, argp);
1725         case IDEFLOPPY_IOCTL_FORMAT_START:
1726                 if (!(file->f_mode & 2))
1727                         return -EPERM;
1728
1729                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1730         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1731                 return idefloppy_get_format_progress(drive, argp);
1732         }
1733
1734         /*
1735          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1736          * and CDROM_SEND_PACKET (legacy) ioctls
1737          */
1738         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1739                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1740                                         bdev->bd_disk, cmd, argp);
1741         else
1742                 err = -ENOTTY;
1743
1744         if (err == -ENOTTY)
1745                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1746
1747         return err;
1748 }
1749
1750 static int idefloppy_media_changed(struct gendisk *disk)
1751 {
1752         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1753         ide_drive_t *drive = floppy->drive;
1754
1755         /* do not scan partitions twice if this is a removable device */
1756         if (drive->attach) {
1757                 drive->attach = 0;
1758                 return 0;
1759         }
1760         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1761 }
1762
1763 static int idefloppy_revalidate_disk(struct gendisk *disk)
1764 {
1765         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1766         set_capacity(disk, idefloppy_capacity(floppy->drive));
1767         return 0;
1768 }
1769
1770 static struct block_device_operations idefloppy_ops = {
1771         .owner          = THIS_MODULE,
1772         .open           = idefloppy_open,
1773         .release        = idefloppy_release,
1774         .ioctl          = idefloppy_ioctl,
1775         .getgeo         = idefloppy_getgeo,
1776         .media_changed  = idefloppy_media_changed,
1777         .revalidate_disk= idefloppy_revalidate_disk
1778 };
1779
1780 static int ide_floppy_probe(ide_drive_t *drive)
1781 {
1782         idefloppy_floppy_t *floppy;
1783         struct gendisk *g;
1784
1785         if (!strstr("ide-floppy", drive->driver_req))
1786                 goto failed;
1787         if (!drive->present)
1788                 goto failed;
1789         if (drive->media != ide_floppy)
1790                 goto failed;
1791         if (!idefloppy_identify_device (drive, drive->id)) {
1792                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1793                 goto failed;
1794         }
1795         if (drive->scsi) {
1796                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1797                 goto failed;
1798         }
1799         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1800                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1801                 goto failed;
1802         }
1803
1804         g = alloc_disk(1 << PARTN_BITS);
1805         if (!g)
1806                 goto out_free_floppy;
1807
1808         ide_init_disk(g, drive);
1809
1810         ide_proc_register_driver(drive, &idefloppy_driver);
1811
1812         kref_init(&floppy->kref);
1813
1814         floppy->drive = drive;
1815         floppy->driver = &idefloppy_driver;
1816         floppy->disk = g;
1817
1818         g->private_data = &floppy->driver;
1819
1820         drive->driver_data = floppy;
1821
1822         idefloppy_setup (drive, floppy);
1823
1824         g->minors = 1 << PARTN_BITS;
1825         g->driverfs_dev = &drive->gendev;
1826         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1827         g->fops = &idefloppy_ops;
1828         drive->attach = 1;
1829         add_disk(g);
1830         return 0;
1831
1832 out_free_floppy:
1833         kfree(floppy);
1834 failed:
1835         return -ENODEV;
1836 }
1837
1838 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1839
1840 static void __exit idefloppy_exit (void)
1841 {
1842         driver_unregister(&idefloppy_driver.gen_driver);
1843 }
1844
1845 static int __init idefloppy_init(void)
1846 {
1847         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1848         return driver_register(&idefloppy_driver.gen_driver);
1849 }
1850
1851 MODULE_ALIAS("ide:*m-floppy*");
1852 module_init(idefloppy_init);
1853 module_exit(idefloppy_exit);
1854 MODULE_LICENSE("GPL");