drivers/ide/ide-floppy.c

   1 /*
   2  * linux/drivers/ide/ide-floppy.c       Version 0.99    Feb 24 2002
   3  *
   4  * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
   6  */
   7
   8 /*
   9  * IDE ATAPI floppy driver.
  10  *
  11  * The driver currently doesn't have any fancy features, just the bare
  12  * minimum read/write support.
  13  *
  14  * This driver supports the following IDE floppy drives:
  15  *
  16  * LS-120/240 SuperDisk
  17  * Iomega Zip 100/250
  18  * Iomega PC Card Clik!/PocketZip
  19  *
  20  * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
  21  * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
  22  *
  23  * Ver 0.1   Oct 17 96   Initial test version, mostly based on ide-tape.c.
  24  * Ver 0.2   Oct 31 96   Minor changes.
  25  * Ver 0.3   Dec  2 96   Fixed error recovery bug.
  26  * Ver 0.4   Jan 26 97   Add support for the HDIO_GETGEO ioctl.
  27  * Ver 0.5   Feb 21 97   Add partitions support.
  28  *                       Use the minimum of the LBA and CHS capacities.
  29  *                       Avoid hwgroup->rq == NULL on the last irq.
  30  *                       Fix potential null dereferencing with DEBUG_LOG.
  31  * Ver 0.8   Dec  7 97   Increase irq timeout from 10 to 50 seconds.
  32  *                       Add media write-protect detection.
  33  *                       Issue START command only if TEST UNIT READY fails.
  34  *                       Add work-around for IOMEGA ZIP revision 21.D.
  35  *                       Remove idefloppy_get_capabilities().
  36  * Ver 0.9   Jul  4 99   Fix a bug which might have caused the number of
  37  *                        bytes requested on each interrupt to be zero.
  38  *                        Thanks to <shanos@es.co.nz> for pointing this out.
  39  * Ver 0.9.sv Jan 6 01   Sam Varshavchik <mrsam@courier-mta.com>
  40  *                       Implement low level formatting.  Reimplemented
  41  *                       IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
  42  *                       bit.  My LS-120 drive barfs on
  43  *                       IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
  44  *                       Compromise by not reporting a failure to get this
  45  *                       mode page.  Implemented four IOCTLs in order to
  46  *                       implement formatting.  IOCTls begin with 0x4600,
  47  *                       0x46 is 'F' as in Format.
  48  *            Jan 9 01   Userland option to select format verify.
  49  *                       Added PC_SUPPRESS_ERROR flag - some idefloppy drives
  50  *                       do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
  51  *                       return a sense error.  Suppress error reporting in
  52  *                       this particular case in order to avoid spurious
  53  *                       errors in syslog.  The culprit is
  54  *                       idefloppy_get_capability_page(), so move it to
  55  *                       idefloppy_begin_format() so that it's not used
  56  *                       unless absolutely necessary.
  57  *                       If drive does not support format progress indication
  58  *                       monitor the dsc bit in the status register.
  59  *                       Also, O_NDELAY on open will allow the device to be
  60  *                       opened without a disk available.  This can be used to
  61  *                       open an unformatted disk, or get the device capacity.
  62  * Ver 0.91  Dec 11 99   Added IOMEGA Clik! drive support by
  63  *                 <paul@paulbristow.net>
  64  * Ver 0.92  Oct 22 00   Paul Bristow became official maintainer for this
  65  *                         driver.  Included Powerbook internal zip kludge.
  66  * Ver 0.93  Oct 24 00   Fixed bugs for Clik! drive
  67  *                        no disk on insert and disk change now works
  68  * Ver 0.94  Oct 27 00   Tidied up to remove strstr(Clik) everywhere
  69  * Ver 0.95  Nov  7 00   Brought across to kernel 2.4
  70  * Ver 0.96  Jan  7 01   Actually in line with release version of 2.4.0
  71  *                       including set_bit patch from Rusty Russell
  72  * Ver 0.97  Jul 22 01   Merge 0.91-0.96 onto 0.9.sv for ac series
  73  * Ver 0.97.sv Aug 3 01  Backported from 2.4.7-ac3
  74  * Ver 0.98  Oct 26 01   Split idefloppy_transfer_pc into two pieces to
  75  *                        fix a lost interrupt problem. It appears the busy
  76  *                        bit was being deasserted by my IOMEGA ATAPI ZIP 100
  77  *                        drive before the drive was actually ready.
  78  * Ver 0.98a Oct 29 01   Expose delay value so we can play.
  79  * Ver 0.99  Feb 24 02   Remove duplicate code, modify clik! detection code
  80  *                        to support new PocketZip drives
  81  */
  82
  83 #define IDEFLOPPY_VERSION "0.99.newide"
  84
  85 #include <linux/config.h>
  86 #include <linux/module.h>
  87 #include <linux/types.h>
  88 #include <linux/string.h>
  89 #include <linux/kernel.h>
  90 #include <linux/delay.h>
  91 #include <linux/timer.h>
  92 #include <linux/mm.h>
  93 #include <linux/interrupt.h>
  94 #include <linux/major.h>
  95 #include <linux/errno.h>
  96 #include <linux/genhd.h>
  97 #include <linux/slab.h>
  98 #include <linux/cdrom.h>
  99 #include <linux/ide.h>
 100
 101 #include <asm/byteorder.h>
 102 #include <asm/irq.h>
 103 #include <asm/uaccess.h>
 104 #include <asm/io.h>
 105 #include <asm/unaligned.h>
 106 #include <asm/bitops.h>
 107
 108 /*
 109  *      The following are used to debug the driver.
 110  */
 111 #define IDEFLOPPY_DEBUG_LOG             0
 112 #define IDEFLOPPY_DEBUG_INFO            0
 113 #define IDEFLOPPY_DEBUG_BUGS            1
 114
 115 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
 116 #define IDEFLOPPY_DEBUG( fmt, args... )
 117
 118
 119 /*
 120  *      Some drives require a longer irq timeout.
 121  */
 122 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
 123
 124 /*
 125  *      After each failed packet command we issue a request sense command
 126  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
 127  */
 128 #define IDEFLOPPY_MAX_PC_RETRIES        3
 129
 130 /*
 131  *      With each packet command, we allocate a buffer of
 132  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
 133  */
 134 #define IDEFLOPPY_PC_BUFFER_SIZE        256
 135
 136 /*
 137  *      In various places in the driver, we need to allocate storage
 138  *      for packet commands and requests, which will remain valid while
 139  *      we leave the driver to wait for an interrupt or a timeout event.
 140  */
 141 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
 142
 143 /*
 144  *      Our view of a packet command.
 145  */
 146 typedef struct idefloppy_packet_command_s {
 147         u8 c[12];                               /* Actual packet bytes */
 148         int retries;                            /* On each retry, we increment retries */
 149         int error;                              /* Error code */
 150         int request_transfer;                   /* Bytes to transfer */
 151         int actually_transferred;               /* Bytes actually transferred */
 152         int buffer_size;                        /* Size of our data buffer */
 153         char *b_data;                           /* Pointer which runs on the buffers */
 154         int b_count;                            /* Missing/Available data on the current buffer */
 155         struct request *rq;                     /* The corresponding request */
 156         u8 *buffer;                             /* Data buffer */
 157         u8 *current_position;                   /* Pointer into the above buffer */
 158         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 159         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 160         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 161 } idefloppy_pc_t;
 162
 163 /*
 164  *      Packet command flag bits.
 165  */
 166 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 167 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 168 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 169 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 170 #define PC_WRITING                      5       /* Data direction */
 171
 172 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 173
 174 /*
 175  *      Removable Block Access Capabilities Page
 176  */
 177 typedef struct {
 178 #if defined(__LITTLE_ENDIAN_BITFIELD)
 179         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 180         unsigned        reserved1_6     :1;     /* Reserved */
 181         unsigned        ps              :1;     /* Should be 0 */
 182 #elif defined(__BIG_ENDIAN_BITFIELD)
 183         unsigned        ps              :1;     /* Should be 0 */
 184         unsigned        reserved1_6     :1;     /* Reserved */
 185         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 186 #else
 187 #error "Bitfield endianness not defined! Check your byteorder.h"
 188 #endif
 189         u8              page_length;            /* Page Length - Should be 0xa */
 190 #if defined(__LITTLE_ENDIAN_BITFIELD)
 191         unsigned        reserved2       :6;
 192         unsigned        srfp            :1;     /* Supports reporting progress of format */
 193         unsigned        sflp            :1;     /* System floppy type device */
 194         unsigned        tlun            :3;     /* Total logical units supported by the device */
 195         unsigned        reserved3       :3;
 196         unsigned        sml             :1;     /* Single / Multiple lun supported */
 197         unsigned        ncd             :1;     /* Non cd optical device */
 198 #elif defined(__BIG_ENDIAN_BITFIELD)
 199         unsigned        sflp            :1;     /* System floppy type device */
 200         unsigned        srfp            :1;     /* Supports reporting progress of format */
 201         unsigned        reserved2       :6;
 202         unsigned        ncd             :1;     /* Non cd optical device */
 203         unsigned        sml             :1;     /* Single / Multiple lun supported */
 204         unsigned        reserved3       :3;
 205         unsigned        tlun            :3;     /* Total logical units supported by the device */
 206 #else
 207 #error "Bitfield endianness not defined! Check your byteorder.h"
 208 #endif
 209         u8              reserved[8];
 210 } idefloppy_capabilities_page_t;
 211
 212 /*
 213  *      Flexible disk page.
 214  */
 215 typedef struct {
 216 #if defined(__LITTLE_ENDIAN_BITFIELD)
 217         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 218         unsigned        reserved1_6     :1;     /* Reserved */
 219         unsigned        ps              :1;     /* The device is capable of saving the page */
 220 #elif defined(__BIG_ENDIAN_BITFIELD)
 221         unsigned        ps              :1;     /* The device is capable of saving the page */
 222         unsigned        reserved1_6     :1;     /* Reserved */
 223         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 224 #else
 225 #error "Bitfield endianness not defined! Check your byteorder.h"
 226 #endif
 227         u8              page_length;            /* Page Length - Should be 0x1e */
 228         u16             transfer_rate;          /* In kilobits per second */
 229         u8              heads, sectors;         /* Number of heads, Number of sectors per track */
 230         u16             sector_size;            /* Byes per sector */
 231         u16             cyls;                   /* Number of cylinders */
 232         u8              reserved10[10];
 233         u8              motor_delay;            /* Motor off delay */
 234         u8              reserved21[7];
 235         u16             rpm;                    /* Rotations per minute */
 236         u8              reserved30[2];
 237 } idefloppy_flexible_disk_page_t;
 238
 239 /*
 240  *      Format capacity
 241  */
 242 typedef struct {
 243         u8              reserved[3];
 244         u8              length;                 /* Length of the following descriptors in bytes */
 245 } idefloppy_capacity_header_t;
 246
 247 typedef struct {
 248         u32             blocks;                 /* Number of blocks */
 249 #if defined(__LITTLE_ENDIAN_BITFIELD)
 250         unsigned        dc              :2;     /* Descriptor Code */
 251         unsigned        reserved        :6;
 252 #elif defined(__BIG_ENDIAN_BITFIELD)
 253         unsigned        reserved        :6;
 254         unsigned        dc              :2;     /* Descriptor Code */
 255 #else
 256 #error "Bitfield endianness not defined! Check your byteorder.h"
 257 #endif
 258         u8              length_msb;             /* Block Length (MSB)*/
 259         u16             length;                 /* Block Length */
 260 } idefloppy_capacity_descriptor_t;
 261
 262 #define CAPACITY_INVALID        0x00
 263 #define CAPACITY_UNFORMATTED    0x01
 264 #define CAPACITY_CURRENT        0x02
 265 #define CAPACITY_NO_CARTRIDGE   0x03
 266
 267 /*
 268  *      Most of our global data which we need to save even as we leave the
 269  *      driver due to an interrupt or a timer event is stored in a variable
 270  *      of type idefloppy_floppy_t, defined below.
 271  */
 272 typedef struct {
 273         ide_drive_t *drive;
 274
 275         /* Current packet command */
 276         idefloppy_pc_t *pc;
 277         /* Last failed packet command */
 278         idefloppy_pc_t *failed_pc;
 279         /* Packet command stack */
 280         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 281         /* Next free packet command storage space */
 282         int pc_stack_index;
 283         struct request rq_stack[IDEFLOPPY_PC_STACK];
 284         /* We implement a circular array */
 285         int rq_stack_index;
 286
 287         /*
 288          *      Last error information
 289          */
 290         u8 sense_key, asc, ascq;
 291         /* delay this long before sending packet command */
 292         u8 ticks;
 293         int progress_indication;
 294
 295         /*
 296          *      Device information
 297          */
 298         /* Current format */
 299         int blocks, block_size, bs_factor;
 300         /* Last format capacity */
 301         idefloppy_capacity_descriptor_t capacity;
 302         /* Copy of the flexible disk page */
 303         idefloppy_flexible_disk_page_t flexible_disk_page;
 304         /* Write protect */
 305         int wp;
 306         /* Supports format progress report */
 307         int srfp;
 308         /* Status/Action flags */
 309         unsigned long flags;
 310 } idefloppy_floppy_t;
 311
 312 #define IDEFLOPPY_TICKS_DELAY   3       /* default delay for ZIP 100 */
 313
 314 /*
 315  *      Floppy flag bits values.
 316  */
 317 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 318 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 319 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 320 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 321 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 322 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 323
 324 /*
 325  *      ATAPI floppy drive packet commands
 326  */
 327 #define IDEFLOPPY_FORMAT_UNIT_CMD       0x04
 328 #define IDEFLOPPY_INQUIRY_CMD           0x12
 329 #define IDEFLOPPY_MODE_SELECT_CMD       0x55
 330 #define IDEFLOPPY_MODE_SENSE_CMD        0x5a
 331 #define IDEFLOPPY_READ10_CMD            0x28
 332 #define IDEFLOPPY_READ12_CMD            0xa8
 333 #define IDEFLOPPY_READ_CAPACITY_CMD     0x23
 334 #define IDEFLOPPY_REQUEST_SENSE_CMD     0x03
 335 #define IDEFLOPPY_PREVENT_REMOVAL_CMD   0x1e
 336 #define IDEFLOPPY_SEEK_CMD              0x2b
 337 #define IDEFLOPPY_START_STOP_CMD        0x1b
 338 #define IDEFLOPPY_TEST_UNIT_READY_CMD   0x00
 339 #define IDEFLOPPY_VERIFY_CMD            0x2f
 340 #define IDEFLOPPY_WRITE10_CMD           0x2a
 341 #define IDEFLOPPY_WRITE12_CMD           0xaa
 342 #define IDEFLOPPY_WRITE_VERIFY_CMD      0x2e
 343
 344 /*
 345  *      Defines for the mode sense command
 346  */
 347 #define MODE_SENSE_CURRENT              0x00
 348 #define MODE_SENSE_CHANGEABLE           0x01
 349 #define MODE_SENSE_DEFAULT              0x02
 350 #define MODE_SENSE_SAVED                0x03
 351
 352 /*
 353  *      IOCTLs used in low-level formatting.
 354  */
 355
 356 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 357 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 358 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 359 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 360
 361 /*
 362  *      Special requests for our block device strategy routine.
 363  */
 364 #define IDEFLOPPY_FIRST_RQ      90
 365
 366 /*
 367  *      IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
 368  */
 369 #define IDEFLOPPY_PC_RQ         90
 370
 371 #define IDEFLOPPY_LAST_RQ       90
 372
 373 /*
 374  *      A macro which can be used to check if a given request command
 375  *      originated in the driver or in the buffer cache layer.
 376  */
 377 #define IDEFLOPPY_RQ_CMD(cmd)   ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
 378
 379 /*
 380  *      Error codes which are returned in rq->errors to the higher part
 381  *      of the driver.
 382  */
 383 #define IDEFLOPPY_ERROR_GENERAL         101
 384
 385 /*
 386  *      The following is used to format the general configuration word of
 387  *      the ATAPI IDENTIFY DEVICE command.
 388  */
 389 struct idefloppy_id_gcw {
 390 #if defined(__LITTLE_ENDIAN_BITFIELD)
 391         unsigned packet_size            :2;     /* Packet Size */
 392         unsigned reserved234            :3;     /* Reserved */
 393         unsigned drq_type               :2;     /* Command packet DRQ type */
 394         unsigned removable              :1;     /* Removable media */
 395         unsigned device_type            :5;     /* Device type */
 396         unsigned reserved13             :1;     /* Reserved */
 397         unsigned protocol               :2;     /* Protocol type */
 398 #elif defined(__BIG_ENDIAN_BITFIELD)
 399         unsigned protocol               :2;     /* Protocol type */
 400         unsigned reserved13             :1;     /* Reserved */
 401         unsigned device_type            :5;     /* Device type */
 402         unsigned removable              :1;     /* Removable media */
 403         unsigned drq_type               :2;     /* Command packet DRQ type */
 404         unsigned reserved234            :3;     /* Reserved */
 405         unsigned packet_size            :2;     /* Packet Size */
 406 #else
 407 #error "Bitfield endianness not defined! Check your byteorder.h"
 408 #endif
 409 };
 410
 411 /*
 412  *      INQUIRY packet command - Data Format
 413  */
 414 typedef struct {
 415 #if defined(__LITTLE_ENDIAN_BITFIELD)
 416         unsigned        device_type     :5;     /* Peripheral Device Type */
 417         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 418         unsigned        reserved1_6t0   :7;     /* Reserved */
 419         unsigned        rmb             :1;     /* Removable Medium Bit */
 420         unsigned        ansi_version    :3;     /* ANSI Version */
 421         unsigned        ecma_version    :3;     /* ECMA Version */
 422         unsigned        iso_version     :2;     /* ISO Version */
 423         unsigned        response_format :4;     /* Response Data Format */
 424         unsigned        reserved3_45    :2;     /* Reserved */
 425         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 426         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 427 #elif defined(__BIG_ENDIAN_BITFIELD)
 428         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 429         unsigned        device_type     :5;     /* Peripheral Device Type */
 430         unsigned        rmb             :1;     /* Removable Medium Bit */
 431         unsigned        reserved1_6t0   :7;     /* Reserved */
 432         unsigned        iso_version     :2;     /* ISO Version */
 433         unsigned        ecma_version    :3;     /* ECMA Version */
 434         unsigned        ansi_version    :3;     /* ANSI Version */
 435         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 436         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 437         unsigned        reserved3_45    :2;     /* Reserved */
 438         unsigned        response_format :4;     /* Response Data Format */
 439 #else
 440 #error "Bitfield endianness not defined! Check your byteorder.h"
 441 #endif
 442         u8              additional_length;      /* Additional Length (total_length-4) */
 443         u8              rsv5, rsv6, rsv7;       /* Reserved */
 444         u8              vendor_id[8];           /* Vendor Identification */
 445         u8              product_id[16];         /* Product Identification */
 446         u8              revision_level[4];      /* Revision Level */
 447         u8              vendor_specific[20];    /* Vendor Specific - Optional */
 448         u8              reserved56t95[40];      /* Reserved - Optional */
 449                                                 /* Additional information may be returned */
 450 } idefloppy_inquiry_result_t;
 451
 452 /*
 453  *      REQUEST SENSE packet command result - Data Format.
 454  */
 455 typedef struct {
 456 #if defined(__LITTLE_ENDIAN_BITFIELD)
 457         unsigned        error_code      :7;     /* Current error (0x70) */
 458         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 459         u8              reserved1       :8;     /* Reserved */
 460         unsigned        sense_key       :4;     /* Sense Key */
 461         unsigned        reserved2_4     :1;     /* Reserved */
 462         unsigned        ili             :1;     /* Incorrect Length Indicator */
 463         unsigned        reserved2_67    :2;
 464 #elif defined(__BIG_ENDIAN_BITFIELD)
 465         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 466         unsigned        error_code      :7;     /* Current error (0x70) */
 467         u8              reserved1       :8;     /* Reserved */
 468         unsigned        reserved2_67    :2;
 469         unsigned        ili             :1;     /* Incorrect Length Indicator */
 470         unsigned        reserved2_4     :1;     /* Reserved */
 471         unsigned        sense_key       :4;     /* Sense Key */
 472 #else
 473 #error "Bitfield endianness not defined! Check your byteorder.h"
 474 #endif
 475         u32             information __attribute__ ((packed));
 476         u8              asl;                    /* Additional sense length (n-7) */
 477         u32             command_specific;       /* Additional command specific information */
 478         u8              asc;                    /* Additional Sense Code */
 479         u8              ascq;                   /* Additional Sense Code Qualifier */
 480         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
 481         u8              sksv[3];
 482         u8              pad[2];                 /* Padding to 20 bytes */
 483 } idefloppy_request_sense_result_t;
 484
 485 /*
 486  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
 487  */
 488 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 489 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 490
 491 /*
 492  *      Mode Parameter Header for the MODE SENSE packet command
 493  */
 494 typedef struct {
 495         u16             mode_data_length;       /* Length of the following data transfer */
 496         u8              medium_type;            /* Medium Type */
 497 #if defined(__LITTLE_ENDIAN_BITFIELD)
 498         unsigned        reserved3       :7;
 499         unsigned        wp              :1;     /* Write protect */
 500 #elif defined(__BIG_ENDIAN_BITFIELD)
 501         unsigned        wp              :1;     /* Write protect */
 502         unsigned        reserved3       :7;
 503 #else
 504 #error "Bitfield endianness not defined! Check your byteorder.h"
 505 #endif
 506         u8              reserved[4];
 507 } idefloppy_mode_parameter_header_t;
 508
 509 #define IDEFLOPPY_MIN(a,b)      ((a)<(b) ? (a):(b))
 510 #define IDEFLOPPY_MAX(a,b)      ((a)>(b) ? (a):(b))
 511
 512 /*
 513  *      Too bad. The drive wants to send us data which we are not ready to accept.
 514  *      Just throw it away.
 515  */
 516 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 517 {
 518         while (bcount--)
 519                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 520 }
 521
 522 #if IDEFLOPPY_DEBUG_BUGS
 523 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 524 {
 525         while (bcount--)
 526                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 527 }
 528 #endif /* IDEFLOPPY_DEBUG_BUGS */
 529
 530
 531 static int idefloppy_end_request (ide_drive_t *drive, int uptodate)
 532 {
 533         struct request *rq;
 534         unsigned long flags;
 535         int ret = 1;
 536
 537         spin_lock_irqsave(&io_request_lock, flags);
 538         rq = HWGROUP(drive)->rq;
 539
 540         /*
 541          * decide whether to reenable DMA -- 3 is a random magic for now,
 542          * if we DMA timeout more than 3 times, just stay in PIO
 543          */
 544         if (drive->state == DMA_PIO_RETRY && drive->retry_pio <= 3) {
 545                 drive->state = 0;
 546                 HWGROUP(drive)->hwif->ide_dma_on(drive);
 547         }
 548
 549         if (!end_that_request_first(rq, uptodate, drive->name)) {
 550                 add_blkdev_randomness(MAJOR(rq->rq_dev));
 551                 blkdev_dequeue_request(rq);
 552                 HWGROUP(drive)->rq = NULL;
 553                 end_that_request_last(rq);
 554                 ret = 0;
 555         }
 556         spin_unlock_irqrestore(&io_request_lock, flags);
 557         return ret;
 558 }
 559
 560 /*
 561  *      idefloppy_do_end_request is used to finish servicing a request.
 562  *
 563  *      For read/write requests, we will call ide_end_request to pass to the
 564  *      next buffer.
 565  */
 566 static int idefloppy_do_end_request (ide_drive_t *drive, int uptodate)
 567 {
 568         idefloppy_floppy_t *floppy = drive->driver_data;
 569         struct request *rq = HWGROUP(drive)->rq;
 570         int error;
 571
 572 #if IDEFLOPPY_DEBUG_LOG
 573         printk(KERN_INFO "Reached idefloppy_end_request\n");
 574 #endif /* IDEFLOPPY_DEBUG_LOG */
 575
 576         switch (uptodate) {
 577                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 578                 case 1: error = 0; break;
 579                 default: error = uptodate;
 580         }
 581         if (error)
 582                 floppy->failed_pc = NULL;
 583         /* Why does this happen? */
 584         if (!rq)
 585                 return 0;
 586         if (!IDEFLOPPY_RQ_CMD(rq->cmd)) {
 587                 /* our real local end request function */
 588                 idefloppy_end_request(drive, uptodate);
 589                 return 0;
 590         }
 591         rq->errors = error;
 592         /* fixme: need to move this local also */
 593         ide_end_drive_cmd(drive, 0, 0);
 594         return 0;
 595 }
 596
 597 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 598 {
 599         struct request *rq = pc->rq;
 600         struct buffer_head *bh = rq->bh;
 601         int count;
 602
 603         while (bcount) {
 604                 if (pc->b_count == bh->b_size) {
 605                         rq->sector += rq->current_nr_sectors;
 606                         rq->nr_sectors -= rq->current_nr_sectors;
 607                         idefloppy_do_end_request(drive, 1);
 608                         if ((bh = rq->bh) != NULL)
 609                                 pc->b_count = 0;
 610                 }
 611                 if (bh == NULL) {
 612                         printk(KERN_ERR "%s: bh == NULL in "
 613                                 "idefloppy_input_buffers, bcount == %d\n",
 614                                 drive->name, bcount);
 615                         idefloppy_discard_data(drive, bcount);
 616                         return;
 617                 }
 618                 count = IDEFLOPPY_MIN(bh->b_size - pc->b_count, bcount);
 619                 HWIF(drive)->atapi_input_bytes(drive, bh->b_data + pc->b_count, count);
 620                 bcount -= count;
 621                 pc->b_count += count;
 622         }
 623 }
 624
 625 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 626 {
 627         struct request *rq = pc->rq;
 628         struct buffer_head *bh = rq->bh;
 629         int count;
 630
 631         while (bcount) {
 632                 if (!pc->b_count) {
 633                         rq->sector += rq->current_nr_sectors;
 634                         rq->nr_sectors -= rq->current_nr_sectors;
 635                         idefloppy_do_end_request(drive, 1);
 636                         if ((bh = rq->bh) != NULL) {
 637                                 pc->b_data = bh->b_data;
 638                                 pc->b_count = bh->b_size;
 639                         }
 640                 }
 641                 if (bh == NULL) {
 642                         printk(KERN_ERR "%s: bh == NULL in "
 643                                 "idefloppy_output_buffers, bcount == %d\n",
 644                                 drive->name, bcount);
 645                         idefloppy_write_zeros (drive, bcount);
 646                         return;
 647                 }
 648                 count = IDEFLOPPY_MIN(pc->b_count, bcount);
 649                 HWIF(drive)->atapi_output_bytes(drive, pc->b_data, count);
 650                 bcount -= count;
 651                 pc->b_data += count;
 652                 pc->b_count -= count;
 653         }
 654 }
 655
 656 #ifdef CONFIG_BLK_DEV_IDEDMA
 657 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 658 {
 659         struct request *rq = pc->rq;
 660         struct buffer_head *bh = rq->bh;
 661
 662         while ((bh = rq->bh) != NULL)
 663                 idefloppy_do_end_request(drive, 1);
 664 }
 665 #endif /* CONFIG_BLK_DEV_IDEDMA */
 666
 667 /*
 668  *      idefloppy_queue_pc_head generates a new packet command request in front
 669  *      of the request queue, before the current request, so that it will be
 670  *      processed immediately, on the next pass through the driver.
 671  */
 672 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 673 {
 674         ide_init_drive_cmd(rq);
 675         rq->buffer = (char *)pc;
 676         rq->cmd = IDEFLOPPY_PC_RQ;
 677         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 678 }
 679
 680 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 681 {
 682         idefloppy_floppy_t *floppy = drive->driver_data;
 683
 684         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 685                 floppy->pc_stack_index=0;
 686         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 687 }
 688
 689 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 690 {
 691         idefloppy_floppy_t *floppy = drive->driver_data;
 692
 693         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 694                 floppy->rq_stack_index = 0;
 695         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 696 }
 697
 698 /*
 699  *      idefloppy_analyze_error is called on each failed packet command retry
 700  *      to analyze the request sense.
 701  */
 702 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
 703 {
 704         idefloppy_floppy_t *floppy = drive->driver_data;
 705
 706         floppy->sense_key = result->sense_key;
 707         floppy->asc = result->asc;
 708         floppy->ascq = result->ascq;
 709         floppy->progress_indication = result->sksv[0] & 0x80 ?
 710                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
 711 #if IDEFLOPPY_DEBUG_LOG
 712         if (floppy->failed_pc)
 713                 printk(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
 714                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
 715                         result->sense_key, result->asc, result->ascq);
 716         else
 717                 printk(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
 718                         "ascq = %x\n", result->sense_key,
 719                         result->asc, result->ascq);
 720 #endif /* IDEFLOPPY_DEBUG_LOG */
 721 }
 722
 723 static void idefloppy_request_sense_callback (ide_drive_t *drive)
 724 {
 725         idefloppy_floppy_t *floppy = drive->driver_data;
 726
 727 #if IDEFLOPPY_DEBUG_LOG
 728         printk(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 729 #endif /* IDEFLOPPY_DEBUG_LOG */
 730         if (!floppy->pc->error) {
 731                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
 732                 idefloppy_do_end_request(drive, 1);
 733         } else {
 734                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
 735                 idefloppy_do_end_request(drive, 0);
 736         }
 737 }
 738
 739 /*
 740  *      General packet command callback function.
 741  */
 742 static void idefloppy_pc_callback (ide_drive_t *drive)
 743 {
 744         idefloppy_floppy_t *floppy = drive->driver_data;
 745
 746 #if IDEFLOPPY_DEBUG_LOG
 747         printk (KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 748 #endif /* IDEFLOPPY_DEBUG_LOG */
 749
 750         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1);
 751 }
 752
 753 /*
 754  *      idefloppy_init_pc initializes a packet command.
 755  */
 756 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 757 {
 758         memset(pc->c, 0, 12);
 759         pc->retries = 0;
 760         pc->flags = 0;
 761         pc->request_transfer = 0;
 762         pc->buffer = pc->pc_buffer;
 763         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 764         pc->b_data = NULL;
 765         pc->callback = &idefloppy_pc_callback;
 766 }
 767
 768 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 769 {
 770         idefloppy_init_pc(pc);
 771         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
 772         pc->c[4] = 255;
 773         pc->request_transfer = 18;
 774         pc->callback = &idefloppy_request_sense_callback;
 775 }
 776
 777 /*
 778  *      idefloppy_retry_pc is called when an error was detected during the
 779  *      last packet command. We queue a request sense packet command in
 780  *      the head of the request list.
 781  */
 782 static void idefloppy_retry_pc (ide_drive_t *drive)
 783 {
 784         idefloppy_pc_t *pc;
 785         struct request *rq;
 786         atapi_error_t error;
 787
 788         error.all = HWIF(drive)->INB(IDE_ERROR_REG);
 789         pc = idefloppy_next_pc_storage(drive);
 790         rq = idefloppy_next_rq_storage(drive);
 791         idefloppy_create_request_sense_cmd(pc);
 792         idefloppy_queue_pc_head(drive, pc, rq);
 793 }
 794
 795 /*
 796  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 797  *      during a packet command.
 798  */
 799 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 800 {
 801         idefloppy_floppy_t *floppy = drive->driver_data;
 802         atapi_status_t status;
 803         atapi_bcount_t bcount;
 804         atapi_ireason_t ireason;
 805         idefloppy_pc_t *pc = floppy->pc;
 806         struct request *rq = pc->rq;
 807         unsigned int temp;
 808
 809 #if IDEFLOPPY_DEBUG_LOG
 810         printk(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
 811                 __FUNCTION__);
 812 #endif /* IDEFLOPPY_DEBUG_LOG */
 813
 814 #ifdef CONFIG_BLK_DEV_IDEDMA
 815         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 816                 if (HWIF(drive)->ide_dma_end(drive)) {
 817                         set_bit(PC_DMA_ERROR, &pc->flags);
 818                 } else {
 819                         pc->actually_transferred = pc->request_transfer;
 820                         idefloppy_update_buffers(drive, pc);
 821                 }
 822 #if IDEFLOPPY_DEBUG_LOG
 823                 printk (KERN_INFO "ide-floppy: DMA finished\n");
 824 #endif /* IDEFLOPPY_DEBUG_LOG */
 825         }
 826 #endif /* CONFIG_BLK_DEV_IDEDMA */
 827
 828         /* Clear the interrupt */
 829         status.all = HWIF(drive)->INB(IDE_STATUS_REG);
 830
 831         if (!status.b.drq) {                    /* No more interrupts */
 832 #if IDEFLOPPY_DEBUG_LOG
 833                 printk(KERN_INFO "Packet command completed, %d bytes "
 834                         "transferred\n", pc->actually_transferred);
 835 #endif /* IDEFLOPPY_DEBUG_LOG */
 836                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 837
 838                 local_irq_enable();
 839
 840                 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
 841                         /* Error detected */
 842 #if IDEFLOPPY_DEBUG_LOG
 843                         printk(KERN_INFO "ide-floppy: %s: I/O error\n",
 844                                 drive->name);
 845 #endif /* IDEFLOPPY_DEBUG_LOG */
 846                         rq->errors++;
 847                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
 848                                 printk(KERN_ERR "ide-floppy: I/O error in "
 849                                         "request sense command\n");
 850                                 return ide_do_reset(drive);
 851                         }
 852                         /* Retry operation */
 853                         idefloppy_retry_pc(drive);
 854                         /* queued, but not started */
 855                         return ide_stopped;
 856                 }
 857                 pc->error = 0;
 858                 if (floppy->failed_pc == pc)
 859                         floppy->failed_pc = NULL;
 860                 /* Command finished - Call the callback function */
 861                 pc->callback(drive);
 862                 return ide_stopped;
 863         }
 864 #ifdef CONFIG_BLK_DEV_IDEDMA
 865         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 866                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 867                         "more interrupts in DMA mode\n");
 868                 (void) HWIF(drive)->ide_dma_off(drive);
 869                 return ide_do_reset(drive);
 870         }
 871 #endif /* CONFIG_BLK_DEV_IDEDMA */
 872         /* Get the number of bytes to transfer */
 873         bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
 874         bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
 875         /* on this interrupt */
 876         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 877
 878         if (ireason.b.cod) {
 879                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 880                 return ide_do_reset(drive);
 881         }
 882         if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
 883                 /* Hopefully, we will never get here */
 884                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 885                         ireason.b.io ? "Write":"Read");
 886                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 887                         ireason.b.io ? "Read":"Write");
 888                 return ide_do_reset(drive);
 889         }
 890         if (!test_bit(PC_WRITING, &pc->flags)) {
 891                 /* Reading - Check that we have enough space */
 892                 temp = pc->actually_transferred + bcount.all;
 893                 if (temp > pc->request_transfer) {
 894                         if (temp > pc->buffer_size) {
 895                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 896                                         "to send us more data than expected "
 897                                         "- discarding data\n");
 898                                 idefloppy_discard_data(drive,bcount.all);
 899                                 if (HWGROUP(drive)->handler != NULL)
 900                                         BUG();
 901                                 ide_set_handler(drive,
 902                                                 &idefloppy_pc_intr,
 903                                                 IDEFLOPPY_WAIT_CMD,
 904                                                 NULL);
 905                                 return ide_started;
 906                         }
 907 #if IDEFLOPPY_DEBUG_LOG
 908                         printk(KERN_NOTICE "ide-floppy: The floppy wants to "
 909                                 "send us more data than expected - "
 910                                 "allowing transfer\n");
 911 #endif /* IDEFLOPPY_DEBUG_LOG */
 912                 }
 913         }
 914         if (test_bit(PC_WRITING, &pc->flags)) {
 915                 if (pc->buffer != NULL)
 916                         /* Write the current buffer */
 917                         HWIF(drive)->atapi_output_bytes(drive,
 918                                                 pc->current_position,
 919                                                 bcount.all);
 920                 else
 921                         idefloppy_output_buffers(drive, pc, bcount.all);
 922         } else {
 923                 if (pc->buffer != NULL)
 924                         /* Read the current buffer */
 925                         HWIF(drive)->atapi_input_bytes(drive,
 926                                                 pc->current_position,
 927                                                 bcount.all);
 928                 else
 929                         idefloppy_input_buffers(drive, pc, bcount.all);
 930         }
 931         /* Update the current position */
 932         pc->actually_transferred += bcount.all;
 933         pc->current_position += bcount.all;
 934
 935         if (HWGROUP(drive)->handler != NULL)
 936                 BUG();
 937         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 938         return ide_started;
 939 }
 940
 941 /*
 942  * This is the original routine that did the packet transfer.
 943  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 944  * for that drive below. The algorithm is chosen based on drive type
 945  */
 946 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 947 {
 948         ide_startstop_t startstop;
 949         idefloppy_floppy_t *floppy = drive->driver_data;
 950         atapi_ireason_t ireason;
 951
 952         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 953                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 954                                 "initiated yet DRQ isn't asserted\n");
 955                 return startstop;
 956         }
 957         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 958         if (!ireason.b.cod || ireason.b.io) {
 959                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 960                                 "issuing a packet command\n");
 961                 return ide_do_reset(drive);
 962         }
 963         if (HWGROUP(drive)->handler != NULL)
 964                 BUG();
 965         /* Set the interrupt routine */
 966         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 967         /* Send the actual packet */
 968         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 969         return ide_started;
 970 }
 971
 972
 973 /*
 974  * What we have here is a classic case of a top half / bottom half
 975  * interrupt service routine. In interrupt mode, the device sends
 976  * an interrupt to signal it's ready to receive a packet. However,
 977  * we need to delay about 2-3 ticks before issuing the packet or we
 978  * gets in trouble.
 979  *
 980  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 981  * directly). In either case, when the device says it's ready for a
 982  * packet, we schedule the packet transfer to occur about 2-3 ticks
 983  * later in transfer_pc2.
 984  */
 985 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 986 {
 987         idefloppy_floppy_t *floppy = drive->driver_data;
 988
 989         /* Send the actual packet */
 990         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 991         /* Timeout for the packet command */
 992         return IDEFLOPPY_WAIT_CMD;
 993 }
 994
 995 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 996 {
 997         idefloppy_floppy_t *floppy = drive->driver_data;
 998         ide_startstop_t startstop;
 999         atapi_ireason_t ireason;
1000
1001         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
1002                 printk(KERN_ERR "ide-floppy: Strange, packet command "
1003                                 "initiated yet DRQ isn't asserted\n");
1004                 return startstop;
1005         }
1006         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1007         if (!ireason.b.cod || ireason.b.io) {
1008                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1009                                 "while issuing a packet command\n");
1010                 return ide_do_reset(drive);
1011         }
1012         /*
1013          * The following delay solves a problem with ATAPI Zip 100 drives
1014          * where the Busy flag was apparently being deasserted before the
1015          * unit was ready to receive data. This was happening on a
1016          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1017          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1018          * used until after the packet is moved in about 50 msec.
1019          */
1020         if (HWGROUP(drive)->handler != NULL)
1021                 BUG();
1022         ide_set_handler(drive,
1023           &idefloppy_pc_intr,           /* service routine for packet command */
1024           floppy->ticks,                /* wait this long before "failing" */
1025           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
1026         return ide_started;
1027 }
1028
1029 /*
1030  *      Issue a packet command
1031  */
1032 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1033 {
1034         idefloppy_floppy_t *floppy = drive->driver_data;
1035         atapi_feature_t feature;
1036         atapi_bcount_t bcount;
1037         ide_handler_t *pkt_xfer_routine;
1038
1039 #if IDEFLOPPY_DEBUG_BUGS
1040         if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1041             pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1042                 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1043                         "Two request sense in serial were issued\n");
1044         }
1045 #endif /* IDEFLOPPY_DEBUG_BUGS */
1046
1047         if (floppy->failed_pc == NULL &&
1048             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1049                 floppy->failed_pc = pc;
1050         /* Set the current packet command */
1051         floppy->pc = pc;
1052
1053         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1054             test_bit(PC_ABORT, &pc->flags)) {
1055                 /*
1056                  *      We will "abort" retrying a packet command in case
1057                  *      a legitimate error code was received.
1058                  */
1059                 if (!test_bit(PC_ABORT, &pc->flags)) {
1060                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1061                                 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1062                                                 "pc = %2x, key = %2x, "
1063                                                 "asc = %2x, ascq = %2x\n",
1064                                                 drive->name, pc->c[0],
1065                                                 floppy->sense_key,
1066                                                 floppy->asc, floppy->ascq);
1067                         }
1068                         /* Giving up */
1069                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1070                 }
1071                 floppy->failed_pc = NULL;
1072                 pc->callback(drive);
1073                 return ide_stopped;
1074         }
1075 #if IDEFLOPPY_DEBUG_LOG
1076         printk (KERN_INFO "Retry number - %d\n", pc->retries);
1077 #endif /* IDEFLOPPY_DEBUG_LOG */
1078
1079         pc->retries++;
1080         /* We haven't transferred any data yet */
1081         pc->actually_transferred = 0;
1082         pc->current_position = pc->buffer;
1083         bcount.all = IDE_MIN(pc->request_transfer, 63 * 1024);
1084
1085 #ifdef CONFIG_BLK_DEV_IDEDMA
1086         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
1087                 (void) HWIF(drive)->ide_dma_off(drive);
1088         }
1089 #endif /* CONFIG_BLK_DEV_IDEDMA */
1090         feature.all = 0;
1091 #ifdef CONFIG_BLK_DEV_IDEDMA
1092         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) {
1093                 if (test_bit(PC_WRITING, &pc->flags)) {
1094                         feature.b.dma = !HWIF(drive)->ide_dma_write(drive);
1095                 } else {
1096                         feature.b.dma = !HWIF(drive)->ide_dma_read(drive);
1097                 }
1098         }
1099 #endif /* CONFIG_BLK_DEV_IDEDMA */
1100
1101         if (IDE_CONTROL_REG)
1102                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1103         /* Use PIO/DMA */
1104         HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1105         HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1106         HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1107         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1108
1109 #ifdef CONFIG_BLK_DEV_IDEDMA
1110         if (feature.b.dma) {    /* Begin DMA, if necessary */
1111                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1112                 (void) (HWIF(drive)->ide_dma_begin(drive));
1113         }
1114 #endif /* CONFIG_BLK_DEV_IDEDMA */
1115
1116         /* Can we transfer the packet when we get the interrupt or wait? */
1117         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1118                 /* wait */
1119                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1120         } else {
1121                 /* immediate */
1122                 pkt_xfer_routine = &idefloppy_transfer_pc;
1123         }
1124
1125         if (test_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1126                 /* Issue the packet command */
1127                 ide_execute_command(drive, WIN_PACKETCMD,
1128                                 pkt_xfer_routine,
1129                                 IDEFLOPPY_WAIT_CMD,
1130                                 NULL);
1131                 return ide_started;
1132         } else {
1133                 /* Issue the packet command */
1134                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1135                 return (*pkt_xfer_routine) (drive);
1136         }
1137 }
1138
1139 static void idefloppy_rw_callback (ide_drive_t *drive)
1140 {
1141 #if IDEFLOPPY_DEBUG_LOG
1142         printk (KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1143 #endif /* IDEFLOPPY_DEBUG_LOG */
1144
1145         idefloppy_do_end_request(drive, 1);
1146         return;
1147 }
1148
1149 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1150 {
1151 #if IDEFLOPPY_DEBUG_LOG
1152         printk(KERN_INFO "ide-floppy: creating prevent removal command, "
1153                 "prevent = %d\n", prevent);
1154 #endif /* IDEFLOPPY_DEBUG_LOG */
1155
1156         idefloppy_init_pc(pc);
1157         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1158         pc->c[4] = prevent;
1159 }
1160
1161 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1162 {
1163         idefloppy_init_pc(pc);
1164         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1165         pc->c[7] = 255;
1166         pc->c[8] = 255;
1167         pc->request_transfer = 255;
1168 }
1169
1170 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1171                                               int flags)
1172 {
1173         idefloppy_init_pc(pc);
1174         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1175         pc->c[1] = 0x17;
1176
1177         memset(pc->buffer, 0, 12);
1178         pc->buffer[1] = 0xA2;
1179         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1180
1181         if (flags & 1)                          /* Verify bit on... */
1182                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1183         pc->buffer[3] = 8;
1184
1185         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1186         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1187         pc->buffer_size=12;
1188         set_bit(PC_WRITING, &pc->flags);
1189 }
1190
1191 /*
1192  *      A mode sense command is used to "sense" floppy parameters.
1193  */
1194 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1195 {
1196         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1197
1198         idefloppy_init_pc(pc);
1199         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1200         pc->c[1] = 0;
1201         pc->c[2] = page_code + (type << 6);
1202
1203         switch (page_code) {
1204                 case IDEFLOPPY_CAPABILITIES_PAGE:
1205                         length += 12;
1206                         break;
1207                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1208                         length += 32;
1209                         break;
1210                 default:
1211                         printk(KERN_ERR "ide-floppy: unsupported page code "
1212                                 "in create_mode_sense_cmd\n");
1213         }
1214         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1215         pc->request_transfer = length;
1216 }
1217
1218 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1219 {
1220         idefloppy_init_pc(pc);
1221         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1222         pc->c[4] = start;
1223 }
1224
1225 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1226 {
1227         idefloppy_init_pc(pc);
1228         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1229 }
1230
1231 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1232 {
1233         int block = sector / floppy->bs_factor;
1234         int blocks = rq->nr_sectors / floppy->bs_factor;
1235
1236 #if IDEFLOPPY_DEBUG_LOG
1237         printk("create_rw1%d_cmd: block == %d, blocks == %d\n",
1238                 2 * test_bit(IDEFLOPPY_USE_READ12, &floppy->flags),
1239                 block, blocks);
1240 #endif /* IDEFLOPPY_DEBUG_LOG */
1241
1242         idefloppy_init_pc(pc);
1243         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1244                 pc->c[0] = rq->cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1245                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1246         } else {
1247                 pc->c[0] = rq->cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1248                 put_unaligned(htons(blocks), (u16 *) &pc->c[7]);
1249         }
1250         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1251         pc->callback = &idefloppy_rw_callback;
1252         pc->rq = rq;
1253         pc->b_data = rq->buffer;
1254         pc->b_count = rq->cmd == READ ? 0 : rq->bh->b_size;
1255         if (rq->cmd == WRITE)
1256                 set_bit(PC_WRITING, &pc->flags);
1257         pc->buffer = NULL;
1258         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1259         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1260 }
1261
1262 /*
1263  *      idefloppy_do_request is our request handling function.
1264  */
1265 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block)
1266 {
1267         idefloppy_floppy_t *floppy = drive->driver_data;
1268         idefloppy_pc_t *pc;
1269
1270 #if IDEFLOPPY_DEBUG_LOG
1271         printk(KERN_INFO "rq_status: %d, rq_dev: %u, cmd: %d, errors: %d\n",
1272                 rq->rq_status, (unsigned int) rq->rq_dev, rq->cmd, rq->errors);
1273         printk(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1274                         "current_nr_sectors: %ld\n", rq->sector,
1275                         rq->nr_sectors, rq->current_nr_sectors);
1276 #endif /* IDEFLOPPY_DEBUG_LOG */
1277
1278         if (rq->errors >= ERROR_MAX) {
1279                 if (floppy->failed_pc != NULL)
1280                         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1281                                         " key = %2x, asc = %2x, ascq = %2x\n",
1282                                 drive->name, floppy->failed_pc->c[0],
1283                                 floppy->sense_key, floppy->asc, floppy->ascq);
1284                 else
1285                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1286                                 drive->name);
1287                 idefloppy_do_end_request(drive, 0);
1288                 return ide_stopped;
1289         }
1290         switch (rq->cmd) {
1291                 case READ:
1292                 case WRITE:
1293                         if (rq->sector % floppy->bs_factor ||
1294                             rq->nr_sectors % floppy->bs_factor) {
1295                                 printk("%s: unsupported r/w request size\n",
1296                                         drive->name);
1297                                 idefloppy_do_end_request(drive, 0);
1298                                 return ide_stopped;
1299                         }
1300                         pc = idefloppy_next_pc_storage(drive);
1301                         idefloppy_create_rw_cmd(floppy, pc, rq, block);
1302                         break;
1303                 case IDEFLOPPY_PC_RQ:
1304                         pc = (idefloppy_pc_t *) rq->buffer;
1305                         break;
1306                 default:
1307                         printk(KERN_ERR "ide-floppy: unsupported command %x"
1308                                 " in request queue\n", rq->cmd);
1309                         idefloppy_do_end_request(drive, 0);
1310                         return ide_stopped;
1311         }
1312         pc->rq = rq;
1313         return idefloppy_issue_pc(drive, pc);
1314 }
1315
1316 /*
1317  *      idefloppy_queue_pc_tail adds a special packet command request to the
1318  *      tail of the request queue, and waits for it to be serviced.
1319  */
1320 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1321 {
1322         struct request rq;
1323
1324         ide_init_drive_cmd(&rq);
1325         rq.buffer = (char *) pc;
1326         rq.cmd = IDEFLOPPY_PC_RQ;
1327         return ide_do_drive_cmd(drive, &rq, ide_wait);
1328 }
1329
1330 /*
1331  *      Look at the flexible disk page parameters. We will ignore the CHS
1332  *      capacity parameters and use the LBA parameters instead.
1333  */
1334 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1335 {
1336         idefloppy_floppy_t *floppy = drive->driver_data;
1337         idefloppy_pc_t pc;
1338         idefloppy_mode_parameter_header_t *header;
1339         idefloppy_flexible_disk_page_t *page;
1340         int capacity, lba_capacity;
1341
1342         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1343         if (idefloppy_queue_pc_tail(drive,&pc)) {
1344                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1345                         "page parameters\n");
1346                 return 1;
1347         }
1348         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1349         floppy->wp = header->wp;
1350         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1351
1352         page->transfer_rate = ntohs(page->transfer_rate);
1353         page->sector_size = ntohs(page->sector_size);
1354         page->cyls = ntohs(page->cyls);
1355         page->rpm = ntohs(page->rpm);
1356         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1357         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1358                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1359                                 "%d sector size, %d rpm\n",
1360                         drive->name, capacity / 1024, page->cyls,
1361                         page->heads, page->sectors,
1362                         page->transfer_rate / 8, page->sector_size, page->rpm);
1363
1364         floppy->flexible_disk_page = *page;
1365         drive->bios_cyl = page->cyls;
1366         drive->bios_head = page->heads;
1367         drive->bios_sect = page->sectors;
1368         lba_capacity = floppy->blocks * floppy->block_size;
1369         if (capacity < lba_capacity) {
1370                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1371                         "bytes, but the drive only handles %d\n",
1372                         drive->name, lba_capacity, capacity);
1373                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1374         }
1375         return 0;
1376 }
1377
1378 static int idefloppy_get_capability_page(ide_drive_t *drive)
1379 {
1380         idefloppy_floppy_t *floppy = drive->driver_data;
1381         idefloppy_pc_t pc;
1382         idefloppy_mode_parameter_header_t *header;
1383         idefloppy_capabilities_page_t *page;
1384
1385         floppy->srfp = 0;
1386         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1387                                                  MODE_SENSE_CURRENT);
1388
1389         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1390         if (idefloppy_queue_pc_tail(drive,&pc)) {
1391                 return 1;
1392         }
1393
1394         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1395         page= (idefloppy_capabilities_page_t *)(header+1);
1396         floppy->srfp = page->srfp;
1397         return (0);
1398 }
1399
1400 /*
1401  *      Determine if a media is present in the floppy drive, and if so,
1402  *      its LBA capacity.
1403  */
1404 static int idefloppy_get_capacity (ide_drive_t *drive)
1405 {
1406         idefloppy_floppy_t *floppy = drive->driver_data;
1407         idefloppy_pc_t pc;
1408         idefloppy_capacity_header_t *header;
1409         idefloppy_capacity_descriptor_t *descriptor;
1410         int i, descriptors, rc = 1, blocks, length;
1411
1412         drive->bios_cyl = 0;
1413         drive->bios_head = drive->bios_sect = 0;
1414         floppy->blocks = floppy->bs_factor = 0;
1415         drive->part[0].nr_sects = 0;
1416
1417         idefloppy_create_read_capacity_cmd(&pc);
1418         if (idefloppy_queue_pc_tail(drive, &pc)) {
1419                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1420                 return 1;
1421         }
1422         header = (idefloppy_capacity_header_t *) pc.buffer;
1423         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1424         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1425
1426         for (i = 0; i < descriptors; i++, descriptor++) {
1427                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1428                 length = descriptor->length = ntohs(descriptor->length);
1429
1430                 if (!i)
1431                 {
1432                 switch (descriptor->dc) {
1433                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1434                 case CAPACITY_UNFORMATTED:
1435                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1436                                 /*
1437                                  * If it is not a clik drive, break out
1438                                  * (maintains previous driver behaviour)
1439                                  */
1440                                 break;
1441                 case CAPACITY_CURRENT:
1442                         /* Normal Zip/LS-120 disks */
1443                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1444                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1445                                         "sector size\n", drive->name,
1446                                         blocks * length / 1024, blocks, length);
1447                         floppy->capacity = *descriptor;
1448                         if (!length || length % 512) {
1449                                 printk(KERN_NOTICE "%s: %d bytes block size "
1450                                         "not supported\n", drive->name, length);
1451                         } else {
1452                                 floppy->blocks = blocks;
1453                                 floppy->block_size = length;
1454                                 if ((floppy->bs_factor = length / 512) != 1)
1455                                         printk(KERN_NOTICE "%s: warning: non "
1456                                                 "512 bytes block size not "
1457                                                 "fully supported\n",
1458                                                 drive->name);
1459                                 rc = 0;
1460                         }
1461                         break;
1462                 case CAPACITY_NO_CARTRIDGE:
1463                         /*
1464                          * This is a KERN_ERR so it appears on screen
1465                          * for the user to see
1466                          */
1467                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1468                         break;
1469                 case CAPACITY_INVALID:
1470                         printk(KERN_ERR "%s: Invalid capacity for disk "
1471                                 "in drive\n", drive->name);
1472                         break;
1473                 }
1474                 }
1475                 if (!i) {
1476                         IDEFLOPPY_DEBUG( "Descriptor 0 Code: %d\n",
1477                                 descriptor->dc);
1478                 }
1479                 IDEFLOPPY_DEBUG( "Descriptor %d: %dkB, %d blocks, %d "
1480                         "sector size\n", i, blocks * length / 1024, blocks,
1481                         length);
1482         }
1483
1484         /* Clik! disk does not support get_flexible_disk_page */
1485         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1486                 (void) idefloppy_get_flexible_disk_page(drive);
1487         }
1488
1489         drive->part[0].nr_sects = floppy->blocks * floppy->bs_factor;
1490         return rc;
1491 }
1492
1493 /*
1494 ** Obtain the list of formattable capacities.
1495 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1496 ** descriptors to userland, instead of our own structures.
1497 **
1498 ** Userland gives us the following structure:
1499 **
1500 ** struct idefloppy_format_capacities {
1501 **        int nformats;
1502 **        struct {
1503 **                int nblocks;
1504 **                int blocksize;
1505 **                } formats[];
1506 **        } ;
1507 **
1508 ** userland initializes nformats to the number of allocated formats[]
1509 ** records.  On exit we set nformats to the number of records we've
1510 ** actually initialized.
1511 **
1512 */
1513
1514 static int idefloppy_get_format_capacities (ide_drive_t *drive,
1515                                             struct inode *inode,
1516                                             struct file *file,
1517                                             int *arg)   /* Cheater */
1518 {
1519         idefloppy_pc_t pc;
1520         idefloppy_capacity_header_t *header;
1521         idefloppy_capacity_descriptor_t *descriptor;
1522         int i, descriptors, blocks, length;
1523         int u_array_size;
1524         int u_index;
1525         int *argp;
1526
1527         if (get_user(u_array_size, arg))
1528                 return (-EFAULT);
1529
1530         if (u_array_size <= 0)
1531                 return (-EINVAL);
1532
1533         idefloppy_create_read_capacity_cmd(&pc);
1534         if (idefloppy_queue_pc_tail(drive, &pc)) {
1535                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1536                 return (-EIO);
1537         }
1538         header = (idefloppy_capacity_header_t *) pc.buffer;
1539         descriptors = header->length /
1540                 sizeof(idefloppy_capacity_descriptor_t);
1541         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1542
1543         u_index = 0;
1544         argp = arg + 1;
1545
1546         /*
1547         ** We always skip the first capacity descriptor.  That's the
1548         ** current capacity.  We are interested in the remaining descriptors,
1549         ** the formattable capacities.
1550         */
1551
1552         for (i=0; i<descriptors; i++, descriptor++) {
1553                 if (u_index >= u_array_size)
1554                         break;  /* User-supplied buffer too small */
1555                 if (i == 0)
1556                         continue;       /* Skip the first descriptor */
1557
1558                 blocks = ntohl(descriptor->blocks);
1559                 length = ntohs(descriptor->length);
1560
1561                 if (put_user(blocks, argp))
1562                         return(-EFAULT);
1563                 ++argp;
1564
1565                 if (put_user(length, argp))
1566                         return (-EFAULT);
1567                 ++argp;
1568
1569                 ++u_index;
1570         }
1571
1572         if (put_user(u_index, arg))
1573                 return (-EFAULT);
1574         return (0);
1575 }
1576
1577 /*
1578 ** Send ATAPI_FORMAT_UNIT to the drive.
1579 **
1580 ** Userland gives us the following structure:
1581 **
1582 ** struct idefloppy_format_command {
1583 **        int nblocks;
1584 **        int blocksize;
1585 **        int flags;
1586 **        } ;
1587 **
1588 ** flags is a bitmask, currently, the only defined flag is:
1589 **
1590 **        0x01 - verify media after format.
1591 */
1592
1593 static int idefloppy_begin_format(ide_drive_t *drive,
1594                                   struct inode *inode,
1595                                   struct file *file,
1596                                   int *arg)
1597 {
1598         int blocks;
1599         int length;
1600         int flags;
1601         idefloppy_pc_t pc;
1602
1603         if (get_user(blocks, arg) ||
1604             get_user(length, arg+1) ||
1605             get_user(flags, arg+2)) {
1606                 return (-EFAULT);
1607         }
1608
1609         /* Get the SFRP bit */
1610         (void) idefloppy_get_capability_page(drive);
1611         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1612         if (idefloppy_queue_pc_tail(drive, &pc)) {
1613                 return (-EIO);
1614         }
1615
1616         return (0);
1617 }
1618
1619 /*
1620 ** Get ATAPI_FORMAT_UNIT progress indication.
1621 **
1622 ** Userland gives a pointer to an int.  The int is set to a progresss
1623 ** indicator 0-65536, with 65536=100%.
1624 **
1625 ** If the drive does not support format progress indication, we just check
1626 ** the dsc bit, and return either 0 or 65536.
1627 */
1628
1629 static int idefloppy_get_format_progress(ide_drive_t *drive,
1630                                          struct inode *inode,
1631                                          struct file *file,
1632                                          int *arg)
1633 {
1634         idefloppy_floppy_t *floppy = drive->driver_data;
1635         idefloppy_pc_t pc;
1636         int progress_indication = 0x10000;
1637
1638         if (floppy->srfp) {
1639                 idefloppy_create_request_sense_cmd(&pc);
1640                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1641                         return (-EIO);
1642                 }
1643
1644                 if (floppy->sense_key == 2 &&
1645                     floppy->asc == 4 &&
1646                     floppy->ascq == 4) {
1647                         progress_indication = floppy->progress_indication;
1648                 }
1649                 /* Else assume format_unit has finished, and we're
1650                 ** at 0x10000 */
1651         } else {
1652                 atapi_status_t status;
1653                 unsigned long flags;
1654
1655                 local_irq_save(flags);
1656                 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1657                 local_irq_restore(flags);
1658
1659                 progress_indication = !status.b.dsc ? 0 : 0x10000;
1660         }
1661         if (put_user(progress_indication, arg))
1662                 return (-EFAULT);
1663
1664         return (0);
1665 }
1666
1667 /*
1668  *      Our special ide-floppy ioctl's.
1669  *
1670  *      Currently there aren't any ioctl's.
1671  */
1672 static int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
1673                                  unsigned int cmd, unsigned long arg)
1674 {
1675         idefloppy_pc_t pc;
1676         idefloppy_floppy_t *floppy = drive->driver_data;
1677         int prevent = (arg) ? 1 : 0;
1678
1679         switch (cmd) {
1680         case CDROMEJECT:
1681                 prevent = 0;
1682                 /* fall through */
1683         case CDROM_LOCKDOOR:
1684                 if (drive->usage > 1)
1685                         return -EBUSY;
1686
1687                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
1688                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1689                         idefloppy_create_prevent_cmd(&pc, prevent);
1690                         (void) idefloppy_queue_pc_tail(drive, &pc);
1691                 }
1692                 if (cmd == CDROMEJECT) {
1693                         idefloppy_create_start_stop_cmd(&pc, 2);
1694                         (void) idefloppy_queue_pc_tail(drive, &pc);
1695                 }
1696                 return 0;
1697         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1698                 return (0);
1699         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1700                 return (idefloppy_get_format_capacities(drive, inode, file,
1701                                                         (int *)arg));
1702         case IDEFLOPPY_IOCTL_FORMAT_START:
1703
1704                 if (!(file->f_mode & 2))
1705                         return (-EPERM);
1706
1707                 {
1708                         idefloppy_floppy_t *floppy = drive->driver_data;
1709
1710                         if (drive->usage > 1) {
1711                                 /* Don't format if someone is using the disk */
1712
1713                                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1714                                           &floppy->flags);
1715                                 return -EBUSY;
1716                         } else {
1717                                 int rc;
1718
1719                                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1720                                         &floppy->flags);
1721
1722                                 rc=idefloppy_begin_format(drive, inode,
1723                                                               file,
1724                                                               (int *)arg);
1725
1726                                 if (rc)
1727                                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1728                                                   &floppy->flags);
1729                                 return (rc);
1730
1731                         /*
1732                         ** Note, the bit will be cleared when the device is
1733                         ** closed.  This is the cleanest way to handle the
1734                         ** situation where the drive does not support
1735                         ** format progress reporting.
1736                         */
1737                         }
1738                 }
1739         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1740                 return (idefloppy_get_format_progress(drive, inode, file,
1741                                                       (int *)arg));
1742         }
1743         return -EIO;
1744 }
1745
1746 /*
1747  *      Our open/release functions
1748  */
1749 static int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
1750 {
1751         idefloppy_floppy_t *floppy = drive->driver_data;
1752         idefloppy_pc_t pc;
1753
1754 #if IDEFLOPPY_DEBUG_LOG
1755         printk(KERN_INFO "Reached idefloppy_open\n");
1756 #endif /* IDEFLOPPY_DEBUG_LOG */
1757
1758         MOD_INC_USE_COUNT;
1759         if (drive->usage == 1) {
1760                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1761                 /* Just in case */
1762
1763                 idefloppy_create_test_unit_ready_cmd(&pc);
1764                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1765                         idefloppy_create_start_stop_cmd(&pc, 1);
1766                         (void) idefloppy_queue_pc_tail(drive, &pc);
1767                 }
1768
1769                 if (idefloppy_get_capacity (drive)
1770                    && (filp->f_flags & O_NDELAY) == 0
1771                     /*
1772                     ** Allow O_NDELAY to open a drive without a disk, or with
1773                     ** an unreadable disk, so that we can get the format
1774                     ** capacity of the drive or begin the format - Sam
1775                     */
1776                     ) {
1777                         drive->usage--;
1778                         MOD_DEC_USE_COUNT;
1779                         return -EIO;
1780                 }
1781
1782                 if (floppy->wp && (filp->f_mode & 2)) {
1783                         drive->usage--;
1784                         MOD_DEC_USE_COUNT;
1785                         return -EROFS;
1786                 }
1787                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1788                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1789                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1790                         idefloppy_create_prevent_cmd(&pc, 1);
1791                         (void) idefloppy_queue_pc_tail(drive, &pc);
1792                 }
1793                 check_disk_change(inode->i_rdev);
1794         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1795                 drive->usage--;
1796                 MOD_DEC_USE_COUNT;
1797                 return -EBUSY;
1798         }
1799         return 0;
1800 }
1801
1802 static void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive)
1803 {
1804         idefloppy_pc_t pc;
1805
1806 #if IDEFLOPPY_DEBUG_LOG
1807         printk (KERN_INFO "Reached idefloppy_release\n");
1808 #endif /* IDEFLOPPY_DEBUG_LOG */
1809
1810         if (!drive->usage) {
1811                 idefloppy_floppy_t *floppy = drive->driver_data;
1812
1813                 invalidate_bdev(inode->i_bdev, 0);
1814
1815                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1816                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1817                         idefloppy_create_prevent_cmd(&pc, 0);
1818                         (void) idefloppy_queue_pc_tail(drive, &pc);
1819                 }
1820
1821                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1822         }
1823         MOD_DEC_USE_COUNT;
1824 }
1825
1826 /*
1827  *      Check media change. Use a simple algorithm for now.
1828  */
1829 static int idefloppy_media_change (ide_drive_t *drive)
1830 {
1831         idefloppy_floppy_t *floppy = drive->driver_data;
1832
1833         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1834 }
1835
1836 /*
1837  *      Revalidate the new media. Should set blk_size[]
1838  */
1839 static void idefloppy_revalidate (ide_drive_t *drive)
1840 {
1841         grok_partitions(HWIF(drive)->gd, drive->select.b.unit,
1842                         1<<PARTN_BITS,
1843                         current_capacity(drive));
1844 }
1845
1846 /*
1847  *      Return the current floppy capacity to ide.c.
1848  */
1849 static unsigned long idefloppy_capacity (ide_drive_t *drive)
1850 {
1851         idefloppy_floppy_t *floppy = drive->driver_data;
1852         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1853
1854         return capacity;
1855 }
1856
1857 /*
1858  *      idefloppy_identify_device checks if we can support a drive,
1859  *      based on the ATAPI IDENTIFY command results.
1860  */
1861 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1862 {
1863         struct idefloppy_id_gcw gcw;
1864 #if IDEFLOPPY_DEBUG_INFO
1865         u16 mask,i;
1866         char buffer[80];
1867 #endif /* IDEFLOPPY_DEBUG_INFO */
1868
1869         *((u16 *) &gcw) = id->config;
1870
1871 #ifdef CONFIG_PPC
1872         /* kludge for Apple PowerBook internal zip */
1873         if ((gcw.device_type == 5) &&
1874             !strstr(id->model, "CD-ROM") &&
1875             strstr(id->model, "ZIP"))
1876                 gcw.device_type = 0;
1877 #endif
1878
1879 #if IDEFLOPPY_DEBUG_INFO
1880         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1881         switch (gcw.protocol) {
1882                 case 0: case 1: sprintf(buffer, "ATA");break;
1883                 case 2: sprintf(buffer, "ATAPI");break;
1884                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1885         }
1886         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1887         switch (gcw.device_type) {
1888                 case 0: sprintf(buffer, "Direct-access Device");break;
1889                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1890                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1891                 case 5: sprintf(buffer, "CD-ROM Device");break;
1892                 case 6: sprintf(buffer, "Reserved");
1893                 case 7: sprintf(buffer, "Optical memory Device");break;
1894                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1895                 default: sprintf(buffer, "Reserved");
1896         }
1897         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1898         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1899         switch (gcw.drq_type) {
1900                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1901                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1902                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1903                 case 3: sprintf(buffer, "Reserved");break;
1904         }
1905         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1906         switch (gcw.packet_size) {
1907                 case 0: sprintf(buffer, "12 bytes");break;
1908                 case 1: sprintf(buffer, "16 bytes");break;
1909                 default: sprintf(buffer, "Reserved");break;
1910         }
1911         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1912         printk(KERN_INFO "Model: %.40s\n",id->model);
1913         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1914         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1915         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1916         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1917         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1918         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1919         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1920         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1921         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1922         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1923         printk(KERN_INFO "Single Word DMA supported modes:\n");
1924         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1925                 if (id->dma_1word & mask)
1926                         printk(KERN_INFO "   Mode %d%s\n", i,
1927                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1928         }
1929         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1930         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1931                 if (id->dma_mword & mask)
1932                         printk(KERN_INFO "   Mode %d%s\n", i,
1933                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1934         }
1935         if (id->field_valid & 0x0002) {
1936                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1937                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1938                 if (id->eide_dma_min == 0)
1939                         sprintf(buffer, "Not supported");
1940                 else
1941                         sprintf(buffer, "%d ns",id->eide_dma_min);
1942                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1943                 if (id->eide_dma_time == 0)
1944                         sprintf(buffer, "Not supported");
1945                 else
1946                         sprintf(buffer, "%d ns",id->eide_dma_time);
1947                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1948                 if (id->eide_pio == 0)
1949                         sprintf(buffer, "Not supported");
1950                 else
1951                         sprintf(buffer, "%d ns",id->eide_pio);
1952                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1953                         buffer);
1954                 if (id->eide_pio_iordy == 0)
1955                         sprintf(buffer, "Not supported");
1956                 else
1957                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1958                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1959         } else
1960                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1961 #endif /* IDEFLOPPY_DEBUG_INFO */
1962
1963         if (gcw.protocol != 2)
1964                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1965         else if (gcw.device_type != 0)
1966                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1967         else if (!gcw.removable)
1968                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1969         else if (gcw.drq_type == 3) {
1970                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1971         } else if (gcw.packet_size != 0) {
1972                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1973         } else
1974                 return 1;
1975         return 0;
1976 }
1977
1978 static void idefloppy_add_settings(ide_drive_t *drive)
1979 {
1980         int major = HWIF(drive)->major;
1981         int minor = drive->select.b.unit << PARTN_BITS;
1982         idefloppy_floppy_t *floppy = drive->driver_data;
1983
1984 /*
1985  *                      drive   setting name    read/write      ioctl   ioctl           data type       min     max     mul_factor      div_factor      data pointer            set function
1986  */
1987         ide_add_setting(drive,  "bios_cyl",             SETTING_RW,                                     -1,                     -1,                     TYPE_INT,       0,      1023,                           1,      1,      &drive->bios_cyl,               NULL);
1988         ide_add_setting(drive,  "bios_head",            SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      255,                            1,      1,      &drive->bios_head,              NULL);
1989         ide_add_setting(drive,  "bios_sect",            SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      63,                             1,      1,      &drive->bios_sect,              NULL);
1990         ide_add_setting(drive,  "breada_readahead",     SETTING_RW,                                     BLKRAGET,               BLKRASET,               TYPE_INT,       0,      255,                            1,      2,      &read_ahead[major],             NULL);
1991         ide_add_setting(drive,  "file_readahead",       SETTING_RW,                                     BLKFRAGET,              BLKFRASET,              TYPE_INTA,      0,      INT_MAX,                        1,      1024,   &max_readahead[major][minor],   NULL);
1992         ide_add_setting(drive,  "max_kb_per_request",   SETTING_RW,                                     BLKSECTGET,             BLKSECTSET,             TYPE_INTA,      1,      255,                            1,      2,      &max_sectors[major][minor],     NULL);
1993         ide_add_setting(drive,  "ticks",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      255,                            1,      1,      &floppy->ticks,         NULL);
1994 }
1995
1996 /*
1997  *      Driver initialization.
1998  */
1999 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
2000 {
2001         struct idefloppy_id_gcw gcw;
2002         int major = HWIF(drive)->major, i;
2003         int minor = drive->select.b.unit << PARTN_BITS;
2004
2005         *((u16 *) &gcw) = drive->id->config;
2006         drive->driver_data = floppy;
2007         drive->ready_stat = 0;
2008         memset(floppy, 0, sizeof(idefloppy_floppy_t));
2009         floppy->drive = drive;
2010         floppy->pc = floppy->pc_stack;
2011         if (gcw.drq_type == 1)
2012                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
2013         /*
2014          *      We used to check revisions here. At this point however
2015          *      I'm giving up. Just assume they are all broken, its easier.
2016          *
2017          *      The actual reason for the workarounds was likely
2018          *      a driver bug after all rather than a firmware bug,
2019          *      and the workaround below used to hide it. It should
2020          *      be fixed as of version 1.9, but to be on the safe side
2021          *      we'll leave the limitation below for the 2.2.x tree.
2022          */
2023
2024         if (strcmp(drive->id->model, "IOMEGA ZIP 100 ATAPI") == 0) {
2025                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
2026                 /* This value will be visible in the /proc/ide/hdx/settings */
2027                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
2028                 for (i = 0; i < 1 << PARTN_BITS; i++)
2029                         max_sectors[major][minor + i] = 64;
2030         }
2031
2032         /*
2033         *      Guess what?  The IOMEGA Clik! drive also needs the
2034         *      above fix.  It makes nasty clicking noises without
2035         *      it, so please don't remove this.
2036         */
2037         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
2038                 for (i = 0; i < 1 << PARTN_BITS; i++)
2039                         max_sectors[major][minor + i] = 64;
2040                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
2041         }
2042
2043
2044         (void) idefloppy_get_capacity(drive);
2045         idefloppy_add_settings(drive);
2046         for (i = 0; i < MAX_DRIVES; ++i) {
2047                 ide_hwif_t *hwif = HWIF(drive);
2048
2049                 if (drive != &hwif->drives[i]) continue;
2050                 hwif->gd->de_arr[i] = drive->de;
2051                 if (drive->removable)
2052                         hwif->gd->flags[i] |= GENHD_FL_REMOVABLE;
2053                 break;
2054         }
2055 }
2056
2057 static int idefloppy_cleanup (ide_drive_t *drive)
2058 {
2059         idefloppy_floppy_t *floppy = drive->driver_data;
2060
2061         if (ide_unregister_subdriver(drive))
2062                 return 1;
2063
2064         drive->driver_data = NULL;
2065         kfree(floppy);
2066         return 0;
2067 }
2068
2069 #ifdef CONFIG_PROC_FS
2070
2071 static ide_proc_entry_t idefloppy_proc[] = {
2072         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
2073         { NULL, 0, NULL, NULL }
2074 };
2075
2076 #else
2077
2078 #define idefloppy_proc  NULL
2079
2080 #endif  /* CONFIG_PROC_FS */
2081
2082 int idefloppy_init (void);
2083 int idefloppy_attach(ide_drive_t *drive);
2084
2085 /*
2086  *      IDE subdriver functions, registered with ide.c
2087  */
2088 static ide_driver_t idefloppy_driver = {
2089         name:                   "ide-floppy",
2090         version:                IDEFLOPPY_VERSION,
2091         media:                  ide_floppy,
2092         busy:                   0,
2093         supports_dma:           1,
2094         supports_dsc_overlap:   0,
2095         cleanup:                idefloppy_cleanup,
2096         standby:                NULL,
2097         suspend:                NULL,
2098         resume:                 NULL,
2099         flushcache:             NULL,
2100         do_request:             idefloppy_do_request,
2101         end_request:            idefloppy_do_end_request,
2102         sense:                  NULL,
2103         error:                  NULL,
2104         ioctl:                  idefloppy_ioctl,
2105         open:                   idefloppy_open,
2106         release:                idefloppy_release,
2107         media_change:           idefloppy_media_change,
2108         revalidate:             idefloppy_revalidate,
2109         pre_reset:              NULL,
2110         capacity:               idefloppy_capacity,
2111         special:                NULL,
2112         proc:                   idefloppy_proc,
2113         init:                   idefloppy_init,
2114         attach:                 idefloppy_attach,
2115         ata_prebuilder:         NULL,
2116         atapi_prebuilder:       NULL,
2117 };
2118
2119 static ide_module_t idefloppy_module = {
2120         IDE_DRIVER_MODULE,
2121         idefloppy_init,
2122         &idefloppy_driver,
2123         NULL
2124 };
2125
2126 int idefloppy_attach (ide_drive_t *drive)
2127 {
2128         idefloppy_floppy_t *floppy;
2129         int ret = 0;
2130
2131         MOD_INC_USE_COUNT;
2132         if (!idefloppy_identify_device(drive, drive->id)) {
2133                 printk(KERN_ERR "ide-floppy: %s: not supported by this "
2134                         "version of ide-floppy\n", drive->name);
2135                         ret = 1;
2136                         goto bye_game_over;
2137         }
2138         if (drive->scsi) {
2139                 printk("ide-floppy: passing drive %s to ide-scsi "
2140                         "emulation.\n", drive->name);
2141                 ret = 1;
2142                 goto bye_game_over;
2143         }
2144         if ((floppy = (idefloppy_floppy_t *) kmalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2145                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy "
2146                         "structure\n", drive->name);
2147                 ret = 1;
2148                 goto bye_game_over;
2149         }
2150         if (ide_register_subdriver(drive,
2151                         &idefloppy_driver, IDE_SUBDRIVER_VERSION)) {
2152                 printk(KERN_ERR "ide-floppy: %s: Failed to register the "
2153                         "driver with ide.c\n", drive->name);
2154                 kfree(floppy);
2155                 ret = 1;
2156                 goto bye_game_over;
2157         }
2158         DRIVER(drive)->busy++;
2159         idefloppy_setup(drive, floppy);
2160         DRIVER(drive)->busy--;
2161
2162 bye_game_over:
2163         MOD_DEC_USE_COUNT;
2164         return ret;
2165 }
2166
2167 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2168
2169 static void __exit idefloppy_exit (void)
2170 {
2171         ide_drive_t *drive;
2172         int failed = 0;
2173
2174         while ((drive = ide_scan_devices(ide_floppy, idefloppy_driver.name,
2175                         &idefloppy_driver, failed)) != NULL) {
2176                 if (idefloppy_cleanup(drive)) {
2177                         printk("%s: cleanup_module() called while still "
2178                                 "busy\n", drive->name);
2179                         failed++;
2180                 }
2181                 /* We must remove proc entries defined in this module.
2182                    Otherwise we oops while accessing these entries */
2183 #ifdef CONFIG_PROC_FS
2184                 if (drive->proc)
2185                         ide_remove_proc_entries(drive->proc, idefloppy_proc);
2186 #endif
2187         }
2188         ide_unregister_module(&idefloppy_module);
2189 }
2190
2191 int idefloppy_init (void)
2192 {
2193 #ifdef CLASSIC_BUILTINS_METHOD
2194         ide_drive_t *drive;
2195         idefloppy_floppy_t *floppy;
2196         int failed = 0;
2197
2198 #endif /* CLASSIC_BUILTINS_METHOD */
2199         MOD_INC_USE_COUNT;
2200 #ifdef CLASSIC_BUILTINS_METHOD
2201         while ((drive = ide_scan_devices(ide_floppy,
2202                         idefloppy_driver.name, NULL, failed++)) != NULL) {
2203                 if (!idefloppy_identify_device(drive, drive->id)) {
2204                         printk(KERN_ERR "ide-floppy: %s: not supported by "
2205                                 "this version of ide-floppy\n", drive->name);
2206                         continue;
2207                 }
2208                 if (drive->scsi) {
2209                         printk("ide-floppy: passing drive %s to ide-scsi "
2210                                 "emulation.\n", drive->name);
2211                         continue;
2212                 }
2213                 if ((floppy = (idefloppy_floppy_t *) kmalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2214                         printk(KERN_ERR "ide-floppy: %s: Can't allocate a "
2215                                 "floppy structure\n", drive->name);
2216                         continue;
2217                 }
2218                 if (ide_register_subdriver(drive,
2219                                 &idefloppy_driver, IDE_SUBDRIVER_VERSION)) {
2220                         printk(KERN_ERR "ide-floppy: %s: Failed to register "
2221                                 "the driver with ide.c\n", drive->name);
2222                         kfree(floppy);
2223                         continue;
2224                 }
2225                 DRIVER(drive)->busy++;
2226                 idefloppy_setup(drive, floppy);
2227                 DRIVER(drive)->busy--;
2228                 failed--;
2229         }
2230 #endif /* CLASSIC_BUILTINS_METHOD */
2231         ide_register_module(&idefloppy_module);
2232         MOD_DEC_USE_COUNT;
2233         return 0;
2234 }
2235
2236 module_init(idefloppy_init);
2237 module_exit(idefloppy_exit);
2238 MODULE_LICENSE("GPL");