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   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/module.h>
  86 #include <linux/types.h>
  87 #include <linux/string.h>
  88 #include <linux/kernel.h>
  89 #include <linux/delay.h>
  90 #include <linux/timer.h>
  91 #include <linux/mm.h>
  92 #include <linux/interrupt.h>
  93 #include <linux/major.h>
  94 #include <linux/errno.h>
  95 #include <linux/genhd.h>
  96 #include <linux/slab.h>
  97 #include <linux/cdrom.h>
  98 #include <linux/ide.h>
  99 #include <linux/bitops.h>
 100 #include <linux/mutex.h>
 101
 102 #include <scsi/scsi_ioctl.h>
 103
 104 #include <asm/byteorder.h>
 105 #include <asm/irq.h>
 106 #include <asm/uaccess.h>
 107 #include <asm/io.h>
 108 #include <asm/unaligned.h>
 109
 110 /*
 111  *      The following are used to debug the driver.
 112  */
 113 #define IDEFLOPPY_DEBUG_LOG             0
 114 #define IDEFLOPPY_DEBUG_INFO            0
 115 #define IDEFLOPPY_DEBUG_BUGS            1
 116
 117 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
 118 #define IDEFLOPPY_DEBUG( fmt, args... )
 119
 120 #if IDEFLOPPY_DEBUG_LOG
 121 #define debug_log printk
 122 #else
 123 #define debug_log(fmt, args... ) do {} while(0)
 124 #endif
 125
 126
 127 /*
 128  *      Some drives require a longer irq timeout.
 129  */
 130 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
 131
 132 /*
 133  *      After each failed packet command we issue a request sense command
 134  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
 135  */
 136 #define IDEFLOPPY_MAX_PC_RETRIES        3
 137
 138 /*
 139  *      With each packet command, we allocate a buffer of
 140  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
 141  */
 142 #define IDEFLOPPY_PC_BUFFER_SIZE        256
 143
 144 /*
 145  *      In various places in the driver, we need to allocate storage
 146  *      for packet commands and requests, which will remain valid while
 147  *      we leave the driver to wait for an interrupt or a timeout event.
 148  */
 149 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
 150
 151 /*
 152  *      Our view of a packet command.
 153  */
 154 typedef struct idefloppy_packet_command_s {
 155         u8 c[12];                               /* Actual packet bytes */
 156         int retries;                            /* On each retry, we increment retries */
 157         int error;                              /* Error code */
 158         int request_transfer;                   /* Bytes to transfer */
 159         int actually_transferred;               /* Bytes actually transferred */
 160         int buffer_size;                        /* Size of our data buffer */
 161         int b_count;                            /* Missing/Available data on the current buffer */
 162         struct request *rq;                     /* The corresponding request */
 163         u8 *buffer;                             /* Data buffer */
 164         u8 *current_position;                   /* Pointer into the above buffer */
 165         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 166         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 167         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 168 } idefloppy_pc_t;
 169
 170 /*
 171  *      Packet command flag bits.
 172  */
 173 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 174 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 175 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 176 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 177 #define PC_WRITING                      5       /* Data direction */
 178
 179 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 180
 181 /*
 182  *      Removable Block Access Capabilities Page
 183  */
 184 typedef struct {
 185 #if defined(__LITTLE_ENDIAN_BITFIELD)
 186         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 187         unsigned        reserved1_6     :1;     /* Reserved */
 188         unsigned        ps              :1;     /* Should be 0 */
 189 #elif defined(__BIG_ENDIAN_BITFIELD)
 190         unsigned        ps              :1;     /* Should be 0 */
 191         unsigned        reserved1_6     :1;     /* Reserved */
 192         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 193 #else
 194 #error "Bitfield endianness not defined! Check your byteorder.h"
 195 #endif
 196         u8              page_length;            /* Page Length - Should be 0xa */
 197 #if defined(__LITTLE_ENDIAN_BITFIELD)
 198         unsigned        reserved2       :6;
 199         unsigned        srfp            :1;     /* Supports reporting progress of format */
 200         unsigned        sflp            :1;     /* System floppy type device */
 201         unsigned        tlun            :3;     /* Total logical units supported by the device */
 202         unsigned        reserved3       :3;
 203         unsigned        sml             :1;     /* Single / Multiple lun supported */
 204         unsigned        ncd             :1;     /* Non cd optical device */
 205 #elif defined(__BIG_ENDIAN_BITFIELD)
 206         unsigned        sflp            :1;     /* System floppy type device */
 207         unsigned        srfp            :1;     /* Supports reporting progress of format */
 208         unsigned        reserved2       :6;
 209         unsigned        ncd             :1;     /* Non cd optical device */
 210         unsigned        sml             :1;     /* Single / Multiple lun supported */
 211         unsigned        reserved3       :3;
 212         unsigned        tlun            :3;     /* Total logical units supported by the device */
 213 #else
 214 #error "Bitfield endianness not defined! Check your byteorder.h"
 215 #endif
 216         u8              reserved[8];
 217 } idefloppy_capabilities_page_t;
 218
 219 /*
 220  *      Flexible disk page.
 221  */
 222 typedef struct {
 223 #if defined(__LITTLE_ENDIAN_BITFIELD)
 224         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 225         unsigned        reserved1_6     :1;     /* Reserved */
 226         unsigned        ps              :1;     /* The device is capable of saving the page */
 227 #elif defined(__BIG_ENDIAN_BITFIELD)
 228         unsigned        ps              :1;     /* The device is capable of saving the page */
 229         unsigned        reserved1_6     :1;     /* Reserved */
 230         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 231 #else
 232 #error "Bitfield endianness not defined! Check your byteorder.h"
 233 #endif
 234         u8              page_length;            /* Page Length - Should be 0x1e */
 235         u16             transfer_rate;          /* In kilobits per second */
 236         u8              heads, sectors;         /* Number of heads, Number of sectors per track */
 237         u16             sector_size;            /* Byes per sector */
 238         u16             cyls;                   /* Number of cylinders */
 239         u8              reserved10[10];
 240         u8              motor_delay;            /* Motor off delay */
 241         u8              reserved21[7];
 242         u16             rpm;                    /* Rotations per minute */
 243         u8              reserved30[2];
 244 } idefloppy_flexible_disk_page_t;
 245
 246 /*
 247  *      Format capacity
 248  */
 249 typedef struct {
 250         u8              reserved[3];
 251         u8              length;                 /* Length of the following descriptors in bytes */
 252 } idefloppy_capacity_header_t;
 253
 254 typedef struct {
 255         u32             blocks;                 /* Number of blocks */
 256 #if defined(__LITTLE_ENDIAN_BITFIELD)
 257         unsigned        dc              :2;     /* Descriptor Code */
 258         unsigned        reserved        :6;
 259 #elif defined(__BIG_ENDIAN_BITFIELD)
 260         unsigned        reserved        :6;
 261         unsigned        dc              :2;     /* Descriptor Code */
 262 #else
 263 #error "Bitfield endianness not defined! Check your byteorder.h"
 264 #endif
 265         u8              length_msb;             /* Block Length (MSB)*/
 266         u16             length;                 /* Block Length */
 267 } idefloppy_capacity_descriptor_t;
 268
 269 #define CAPACITY_INVALID        0x00
 270 #define CAPACITY_UNFORMATTED    0x01
 271 #define CAPACITY_CURRENT        0x02
 272 #define CAPACITY_NO_CARTRIDGE   0x03
 273
 274 /*
 275  *      Most of our global data which we need to save even as we leave the
 276  *      driver due to an interrupt or a timer event is stored in a variable
 277  *      of type idefloppy_floppy_t, defined below.
 278  */
 279 typedef struct ide_floppy_obj {
 280         ide_drive_t     *drive;
 281         ide_driver_t    *driver;
 282         struct gendisk  *disk;
 283         struct kref     kref;
 284         unsigned int    openers;        /* protected by BKL for now */
 285
 286         /* Current packet command */
 287         idefloppy_pc_t *pc;
 288         /* Last failed packet command */
 289         idefloppy_pc_t *failed_pc;
 290         /* Packet command stack */
 291         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 292         /* Next free packet command storage space */
 293         int pc_stack_index;
 294         struct request rq_stack[IDEFLOPPY_PC_STACK];
 295         /* We implement a circular array */
 296         int rq_stack_index;
 297
 298         /*
 299          *      Last error information
 300          */
 301         u8 sense_key, asc, ascq;
 302         /* delay this long before sending packet command */
 303         u8 ticks;
 304         int progress_indication;
 305
 306         /*
 307          *      Device information
 308          */
 309         /* Current format */
 310         int blocks, block_size, bs_factor;
 311         /* Last format capacity */
 312         idefloppy_capacity_descriptor_t capacity;
 313         /* Copy of the flexible disk page */
 314         idefloppy_flexible_disk_page_t flexible_disk_page;
 315         /* Write protect */
 316         int wp;
 317         /* Supports format progress report */
 318         int srfp;
 319         /* Status/Action flags */
 320         unsigned long flags;
 321 } idefloppy_floppy_t;
 322
 323 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 324
 325 /*
 326  *      Floppy flag bits values.
 327  */
 328 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 329 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 330 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 331 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 332 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 333 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 334
 335 /*
 336  *      ATAPI floppy drive packet commands
 337  */
 338 #define IDEFLOPPY_FORMAT_UNIT_CMD       0x04
 339 #define IDEFLOPPY_INQUIRY_CMD           0x12
 340 #define IDEFLOPPY_MODE_SELECT_CMD       0x55
 341 #define IDEFLOPPY_MODE_SENSE_CMD        0x5a
 342 #define IDEFLOPPY_READ10_CMD            0x28
 343 #define IDEFLOPPY_READ12_CMD            0xa8
 344 #define IDEFLOPPY_READ_CAPACITY_CMD     0x23
 345 #define IDEFLOPPY_REQUEST_SENSE_CMD     0x03
 346 #define IDEFLOPPY_PREVENT_REMOVAL_CMD   0x1e
 347 #define IDEFLOPPY_SEEK_CMD              0x2b
 348 #define IDEFLOPPY_START_STOP_CMD        0x1b
 349 #define IDEFLOPPY_TEST_UNIT_READY_CMD   0x00
 350 #define IDEFLOPPY_VERIFY_CMD            0x2f
 351 #define IDEFLOPPY_WRITE10_CMD           0x2a
 352 #define IDEFLOPPY_WRITE12_CMD           0xaa
 353 #define IDEFLOPPY_WRITE_VERIFY_CMD      0x2e
 354
 355 /*
 356  *      Defines for the mode sense command
 357  */
 358 #define MODE_SENSE_CURRENT              0x00
 359 #define MODE_SENSE_CHANGEABLE           0x01
 360 #define MODE_SENSE_DEFAULT              0x02
 361 #define MODE_SENSE_SAVED                0x03
 362
 363 /*
 364  *      IOCTLs used in low-level formatting.
 365  */
 366
 367 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 368 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 369 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 370 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 371
 372 /*
 373  *      Error codes which are returned in rq->errors to the higher part
 374  *      of the driver.
 375  */
 376 #define IDEFLOPPY_ERROR_GENERAL         101
 377
 378 /*
 379  *      The following is used to format the general configuration word of
 380  *      the ATAPI IDENTIFY DEVICE command.
 381  */
 382 struct idefloppy_id_gcw {
 383 #if defined(__LITTLE_ENDIAN_BITFIELD)
 384         unsigned packet_size            :2;     /* Packet Size */
 385         unsigned reserved234            :3;     /* Reserved */
 386         unsigned drq_type               :2;     /* Command packet DRQ type */
 387         unsigned removable              :1;     /* Removable media */
 388         unsigned device_type            :5;     /* Device type */
 389         unsigned reserved13             :1;     /* Reserved */
 390         unsigned protocol               :2;     /* Protocol type */
 391 #elif defined(__BIG_ENDIAN_BITFIELD)
 392         unsigned protocol               :2;     /* Protocol type */
 393         unsigned reserved13             :1;     /* Reserved */
 394         unsigned device_type            :5;     /* Device type */
 395         unsigned removable              :1;     /* Removable media */
 396         unsigned drq_type               :2;     /* Command packet DRQ type */
 397         unsigned reserved234            :3;     /* Reserved */
 398         unsigned packet_size            :2;     /* Packet Size */
 399 #else
 400 #error "Bitfield endianness not defined! Check your byteorder.h"
 401 #endif
 402 };
 403
 404 /*
 405  *      INQUIRY packet command - Data Format
 406  */
 407 typedef struct {
 408 #if defined(__LITTLE_ENDIAN_BITFIELD)
 409         unsigned        device_type     :5;     /* Peripheral Device Type */
 410         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 411         unsigned        reserved1_6t0   :7;     /* Reserved */
 412         unsigned        rmb             :1;     /* Removable Medium Bit */
 413         unsigned        ansi_version    :3;     /* ANSI Version */
 414         unsigned        ecma_version    :3;     /* ECMA Version */
 415         unsigned        iso_version     :2;     /* ISO Version */
 416         unsigned        response_format :4;     /* Response Data Format */
 417         unsigned        reserved3_45    :2;     /* Reserved */
 418         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 419         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 420 #elif defined(__BIG_ENDIAN_BITFIELD)
 421         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 422         unsigned        device_type     :5;     /* Peripheral Device Type */
 423         unsigned        rmb             :1;     /* Removable Medium Bit */
 424         unsigned        reserved1_6t0   :7;     /* Reserved */
 425         unsigned        iso_version     :2;     /* ISO Version */
 426         unsigned        ecma_version    :3;     /* ECMA Version */
 427         unsigned        ansi_version    :3;     /* ANSI Version */
 428         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 429         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 430         unsigned        reserved3_45    :2;     /* Reserved */
 431         unsigned        response_format :4;     /* Response Data Format */
 432 #else
 433 #error "Bitfield endianness not defined! Check your byteorder.h"
 434 #endif
 435         u8              additional_length;      /* Additional Length (total_length-4) */
 436         u8              rsv5, rsv6, rsv7;       /* Reserved */
 437         u8              vendor_id[8];           /* Vendor Identification */
 438         u8              product_id[16];         /* Product Identification */
 439         u8              revision_level[4];      /* Revision Level */
 440         u8              vendor_specific[20];    /* Vendor Specific - Optional */
 441         u8              reserved56t95[40];      /* Reserved - Optional */
 442                                                 /* Additional information may be returned */
 443 } idefloppy_inquiry_result_t;
 444
 445 /*
 446  *      REQUEST SENSE packet command result - Data Format.
 447  */
 448 typedef struct {
 449 #if defined(__LITTLE_ENDIAN_BITFIELD)
 450         unsigned        error_code      :7;     /* Current error (0x70) */
 451         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 452         u8              reserved1       :8;     /* Reserved */
 453         unsigned        sense_key       :4;     /* Sense Key */
 454         unsigned        reserved2_4     :1;     /* Reserved */
 455         unsigned        ili             :1;     /* Incorrect Length Indicator */
 456         unsigned        reserved2_67    :2;
 457 #elif defined(__BIG_ENDIAN_BITFIELD)
 458         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 459         unsigned        error_code      :7;     /* Current error (0x70) */
 460         u8              reserved1       :8;     /* Reserved */
 461         unsigned        reserved2_67    :2;
 462         unsigned        ili             :1;     /* Incorrect Length Indicator */
 463         unsigned        reserved2_4     :1;     /* Reserved */
 464         unsigned        sense_key       :4;     /* Sense Key */
 465 #else
 466 #error "Bitfield endianness not defined! Check your byteorder.h"
 467 #endif
 468         u32             information __attribute__ ((packed));
 469         u8              asl;                    /* Additional sense length (n-7) */
 470         u32             command_specific;       /* Additional command specific information */
 471         u8              asc;                    /* Additional Sense Code */
 472         u8              ascq;                   /* Additional Sense Code Qualifier */
 473         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
 474         u8              sksv[3];
 475         u8              pad[2];                 /* Padding to 20 bytes */
 476 } idefloppy_request_sense_result_t;
 477
 478 /*
 479  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
 480  */
 481 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 482 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 483
 484 /*
 485  *      Mode Parameter Header for the MODE SENSE packet command
 486  */
 487 typedef struct {
 488         u16             mode_data_length;       /* Length of the following data transfer */
 489         u8              medium_type;            /* Medium Type */
 490 #if defined(__LITTLE_ENDIAN_BITFIELD)
 491         unsigned        reserved3       :7;
 492         unsigned        wp              :1;     /* Write protect */
 493 #elif defined(__BIG_ENDIAN_BITFIELD)
 494         unsigned        wp              :1;     /* Write protect */
 495         unsigned        reserved3       :7;
 496 #else
 497 #error "Bitfield endianness not defined! Check your byteorder.h"
 498 #endif
 499         u8              reserved[4];
 500 } idefloppy_mode_parameter_header_t;
 501
 502 static DEFINE_MUTEX(idefloppy_ref_mutex);
 503
 504 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 505
 506 #define ide_floppy_g(disk) \
 507         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 508
 509 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 510 {
 511         struct ide_floppy_obj *floppy = NULL;
 512
 513         mutex_lock(&idefloppy_ref_mutex);
 514         floppy = ide_floppy_g(disk);
 515         if (floppy)
 516                 kref_get(&floppy->kref);
 517         mutex_unlock(&idefloppy_ref_mutex);
 518         return floppy;
 519 }
 520
 521 static void ide_floppy_release(struct kref *);
 522
 523 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 524 {
 525         mutex_lock(&idefloppy_ref_mutex);
 526         kref_put(&floppy->kref, ide_floppy_release);
 527         mutex_unlock(&idefloppy_ref_mutex);
 528 }
 529
 530 /*
 531  *      Too bad. The drive wants to send us data which we are not ready to accept.
 532  *      Just throw it away.
 533  */
 534 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 535 {
 536         while (bcount--)
 537                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 538 }
 539
 540 #if IDEFLOPPY_DEBUG_BUGS
 541 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 542 {
 543         while (bcount--)
 544                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 545 }
 546 #endif /* IDEFLOPPY_DEBUG_BUGS */
 547
 548
 549 /*
 550  *      idefloppy_do_end_request is used to finish servicing a request.
 551  *
 552  *      For read/write requests, we will call ide_end_request to pass to the
 553  *      next buffer.
 554  */
 555 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 556 {
 557         idefloppy_floppy_t *floppy = drive->driver_data;
 558         struct request *rq = HWGROUP(drive)->rq;
 559         int error;
 560
 561         debug_log(KERN_INFO "Reached idefloppy_end_request\n");
 562
 563         switch (uptodate) {
 564                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 565                 case 1: error = 0; break;
 566                 default: error = uptodate;
 567         }
 568         if (error)
 569                 floppy->failed_pc = NULL;
 570         /* Why does this happen? */
 571         if (!rq)
 572                 return 0;
 573         if (!blk_special_request(rq)) {
 574                 /* our real local end request function */
 575                 ide_end_request(drive, uptodate, nsecs);
 576                 return 0;
 577         }
 578         rq->errors = error;
 579         /* fixme: need to move this local also */
 580         ide_end_drive_cmd(drive, 0, 0);
 581         return 0;
 582 }
 583
 584 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 585 {
 586         struct request *rq = pc->rq;
 587         struct bio_vec *bvec;
 588         struct req_iterator iter;
 589         unsigned long flags;
 590         char *data;
 591         int count, done = 0;
 592
 593         rq_for_each_segment(bvec, rq, iter) {
 594                 if (!bcount)
 595                         break;
 596
 597                 count = min(bvec->bv_len, bcount);
 598
 599                 data = bvec_kmap_irq(bvec, &flags);
 600                 drive->hwif->atapi_input_bytes(drive, data, count);
 601                 bvec_kunmap_irq(data, &flags);
 602
 603                 bcount -= count;
 604                 pc->b_count += count;
 605                 done += count;
 606         }
 607
 608         idefloppy_do_end_request(drive, 1, done >> 9);
 609
 610         if (bcount) {
 611                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 612                 idefloppy_discard_data(drive, bcount);
 613         }
 614 }
 615
 616 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 617 {
 618         struct request *rq = pc->rq;
 619         struct req_iterator iter;
 620         struct bio_vec *bvec;
 621         unsigned long flags;
 622         int count, done = 0;
 623         char *data;
 624
 625         rq_for_each_segment(bvec, rq, iter) {
 626                 if (!bcount)
 627                         break;
 628
 629                 count = min(bvec->bv_len, bcount);
 630
 631                 data = bvec_kmap_irq(bvec, &flags);
 632                 drive->hwif->atapi_output_bytes(drive, data, count);
 633                 bvec_kunmap_irq(data, &flags);
 634
 635                 bcount -= count;
 636                 pc->b_count += count;
 637                 done += count;
 638         }
 639
 640         idefloppy_do_end_request(drive, 1, done >> 9);
 641
 642 #if IDEFLOPPY_DEBUG_BUGS
 643         if (bcount) {
 644                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 645                 idefloppy_write_zeros(drive, bcount);
 646         }
 647 #endif
 648 }
 649
 650 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 651 {
 652         struct request *rq = pc->rq;
 653         struct bio *bio = rq->bio;
 654
 655         while ((bio = rq->bio) != NULL)
 656                 idefloppy_do_end_request(drive, 1, 0);
 657 }
 658
 659 /*
 660  *      idefloppy_queue_pc_head generates a new packet command request in front
 661  *      of the request queue, before the current request, so that it will be
 662  *      processed immediately, on the next pass through the driver.
 663  */
 664 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 665 {
 666         struct ide_floppy_obj *floppy = drive->driver_data;
 667
 668         ide_init_drive_cmd(rq);
 669         rq->buffer = (char *) pc;
 670         rq->cmd_type = REQ_TYPE_SPECIAL;
 671         rq->rq_disk = floppy->disk;
 672         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 673 }
 674
 675 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 676 {
 677         idefloppy_floppy_t *floppy = drive->driver_data;
 678
 679         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 680                 floppy->pc_stack_index=0;
 681         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 682 }
 683
 684 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 685 {
 686         idefloppy_floppy_t *floppy = drive->driver_data;
 687
 688         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 689                 floppy->rq_stack_index = 0;
 690         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 691 }
 692
 693 /*
 694  *      idefloppy_analyze_error is called on each failed packet command retry
 695  *      to analyze the request sense.
 696  */
 697 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
 698 {
 699         idefloppy_floppy_t *floppy = drive->driver_data;
 700
 701         floppy->sense_key = result->sense_key;
 702         floppy->asc = result->asc;
 703         floppy->ascq = result->ascq;
 704         floppy->progress_indication = result->sksv[0] & 0x80 ?
 705                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
 706         if (floppy->failed_pc)
 707                 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
 708                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
 709                         result->sense_key, result->asc, result->ascq);
 710         else
 711                 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
 712                         "ascq = %x\n", result->sense_key,
 713                         result->asc, result->ascq);
 714 }
 715
 716 static void idefloppy_request_sense_callback (ide_drive_t *drive)
 717 {
 718         idefloppy_floppy_t *floppy = drive->driver_data;
 719
 720         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 721
 722         if (!floppy->pc->error) {
 723                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
 724                 idefloppy_do_end_request(drive, 1, 0);
 725         } else {
 726                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
 727                 idefloppy_do_end_request(drive, 0, 0);
 728         }
 729 }
 730
 731 /*
 732  *      General packet command callback function.
 733  */
 734 static void idefloppy_pc_callback (ide_drive_t *drive)
 735 {
 736         idefloppy_floppy_t *floppy = drive->driver_data;
 737
 738         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 739
 740         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 741 }
 742
 743 /*
 744  *      idefloppy_init_pc initializes a packet command.
 745  */
 746 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 747 {
 748         memset(pc->c, 0, 12);
 749         pc->retries = 0;
 750         pc->flags = 0;
 751         pc->request_transfer = 0;
 752         pc->buffer = pc->pc_buffer;
 753         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 754         pc->callback = &idefloppy_pc_callback;
 755 }
 756
 757 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 758 {
 759         idefloppy_init_pc(pc);
 760         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
 761         pc->c[4] = 255;
 762         pc->request_transfer = 18;
 763         pc->callback = &idefloppy_request_sense_callback;
 764 }
 765
 766 /*
 767  *      idefloppy_retry_pc is called when an error was detected during the
 768  *      last packet command. We queue a request sense packet command in
 769  *      the head of the request list.
 770  */
 771 static void idefloppy_retry_pc (ide_drive_t *drive)
 772 {
 773         idefloppy_pc_t *pc;
 774         struct request *rq;
 775
 776         (void)drive->hwif->INB(IDE_ERROR_REG);
 777         pc = idefloppy_next_pc_storage(drive);
 778         rq = idefloppy_next_rq_storage(drive);
 779         idefloppy_create_request_sense_cmd(pc);
 780         idefloppy_queue_pc_head(drive, pc, rq);
 781 }
 782
 783 /*
 784  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 785  *      during a packet command.
 786  */
 787 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 788 {
 789         idefloppy_floppy_t *floppy = drive->driver_data;
 790         atapi_bcount_t bcount;
 791         atapi_ireason_t ireason;
 792         idefloppy_pc_t *pc = floppy->pc;
 793         struct request *rq = pc->rq;
 794         unsigned int temp;
 795         u8 stat;
 796
 797         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
 798                 __FUNCTION__);
 799
 800         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 801                 if (HWIF(drive)->ide_dma_end(drive)) {
 802                         set_bit(PC_DMA_ERROR, &pc->flags);
 803                 } else {
 804                         pc->actually_transferred = pc->request_transfer;
 805                         idefloppy_update_buffers(drive, pc);
 806                 }
 807                 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
 808         }
 809
 810         /* Clear the interrupt */
 811         stat = drive->hwif->INB(IDE_STATUS_REG);
 812
 813         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 814                 debug_log(KERN_INFO "Packet command completed, %d bytes "
 815                         "transferred\n", pc->actually_transferred);
 816                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 817
 818                 local_irq_enable_in_hardirq();
 819
 820                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 821                         /* Error detected */
 822                         debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
 823                                 drive->name);
 824                         rq->errors++;
 825                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
 826                                 printk(KERN_ERR "ide-floppy: I/O error in "
 827                                         "request sense command\n");
 828                                 return ide_do_reset(drive);
 829                         }
 830                         /* Retry operation */
 831                         idefloppy_retry_pc(drive);
 832                         /* queued, but not started */
 833                         return ide_stopped;
 834                 }
 835                 pc->error = 0;
 836                 if (floppy->failed_pc == pc)
 837                         floppy->failed_pc = NULL;
 838                 /* Command finished - Call the callback function */
 839                 pc->callback(drive);
 840                 return ide_stopped;
 841         }
 842
 843         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 844                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 845                         "more interrupts in DMA mode\n");
 846                 ide_dma_off(drive);
 847                 return ide_do_reset(drive);
 848         }
 849
 850         /* Get the number of bytes to transfer */
 851         bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
 852         bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
 853         /* on this interrupt */
 854         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 855
 856         if (ireason.b.cod) {
 857                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 858                 return ide_do_reset(drive);
 859         }
 860         if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
 861                 /* Hopefully, we will never get here */
 862                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 863                         ireason.b.io ? "Write":"Read");
 864                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 865                         ireason.b.io ? "Read":"Write");
 866                 return ide_do_reset(drive);
 867         }
 868         if (!test_bit(PC_WRITING, &pc->flags)) {
 869                 /* Reading - Check that we have enough space */
 870                 temp = pc->actually_transferred + bcount.all;
 871                 if (temp > pc->request_transfer) {
 872                         if (temp > pc->buffer_size) {
 873                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 874                                         "to send us more data than expected "
 875                                         "- discarding data\n");
 876                                 idefloppy_discard_data(drive,bcount.all);
 877                                 BUG_ON(HWGROUP(drive)->handler != NULL);
 878                                 ide_set_handler(drive,
 879                                                 &idefloppy_pc_intr,
 880                                                 IDEFLOPPY_WAIT_CMD,
 881                                                 NULL);
 882                                 return ide_started;
 883                         }
 884                         debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
 885                                 "send us more data than expected - "
 886                                 "allowing transfer\n");
 887                 }
 888         }
 889         if (test_bit(PC_WRITING, &pc->flags)) {
 890                 if (pc->buffer != NULL)
 891                         /* Write the current buffer */
 892                         HWIF(drive)->atapi_output_bytes(drive,
 893                                                 pc->current_position,
 894                                                 bcount.all);
 895                 else
 896                         idefloppy_output_buffers(drive, pc, bcount.all);
 897         } else {
 898                 if (pc->buffer != NULL)
 899                         /* Read the current buffer */
 900                         HWIF(drive)->atapi_input_bytes(drive,
 901                                                 pc->current_position,
 902                                                 bcount.all);
 903                 else
 904                         idefloppy_input_buffers(drive, pc, bcount.all);
 905         }
 906         /* Update the current position */
 907         pc->actually_transferred += bcount.all;
 908         pc->current_position += bcount.all;
 909
 910         BUG_ON(HWGROUP(drive)->handler != NULL);
 911         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 912         return ide_started;
 913 }
 914
 915 /*
 916  * This is the original routine that did the packet transfer.
 917  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 918  * for that drive below. The algorithm is chosen based on drive type
 919  */
 920 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 921 {
 922         ide_startstop_t startstop;
 923         idefloppy_floppy_t *floppy = drive->driver_data;
 924         atapi_ireason_t ireason;
 925
 926         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 927                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 928                                 "initiated yet DRQ isn't asserted\n");
 929                 return startstop;
 930         }
 931         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 932         if (!ireason.b.cod || ireason.b.io) {
 933                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 934                                 "issuing a packet command\n");
 935                 return ide_do_reset(drive);
 936         }
 937         BUG_ON(HWGROUP(drive)->handler != NULL);
 938         /* Set the interrupt routine */
 939         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 940         /* Send the actual packet */
 941         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 942         return ide_started;
 943 }
 944
 945
 946 /*
 947  * What we have here is a classic case of a top half / bottom half
 948  * interrupt service routine. In interrupt mode, the device sends
 949  * an interrupt to signal it's ready to receive a packet. However,
 950  * we need to delay about 2-3 ticks before issuing the packet or we
 951  * gets in trouble.
 952  *
 953  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 954  * directly). In either case, when the device says it's ready for a
 955  * packet, we schedule the packet transfer to occur about 2-3 ticks
 956  * later in transfer_pc2.
 957  */
 958 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 959 {
 960         idefloppy_floppy_t *floppy = drive->driver_data;
 961
 962         /* Send the actual packet */
 963         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 964         /* Timeout for the packet command */
 965         return IDEFLOPPY_WAIT_CMD;
 966 }
 967
 968 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 969 {
 970         idefloppy_floppy_t *floppy = drive->driver_data;
 971         ide_startstop_t startstop;
 972         atapi_ireason_t ireason;
 973
 974         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 975                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 976                                 "initiated yet DRQ isn't asserted\n");
 977                 return startstop;
 978         }
 979         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 980         if (!ireason.b.cod || ireason.b.io) {
 981                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 982                                 "while issuing a packet command\n");
 983                 return ide_do_reset(drive);
 984         }
 985         /*
 986          * The following delay solves a problem with ATAPI Zip 100 drives
 987          * where the Busy flag was apparently being deasserted before the
 988          * unit was ready to receive data. This was happening on a
 989          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 990          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 991          * used until after the packet is moved in about 50 msec.
 992          */
 993         BUG_ON(HWGROUP(drive)->handler != NULL);
 994         ide_set_handler(drive,
 995           &idefloppy_pc_intr,           /* service routine for packet command */
 996           floppy->ticks,                /* wait this long before "failing" */
 997           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 998         return ide_started;
 999 }
1000
1001 /**
1002  * idefloppy_should_report_error()
1003  *
1004  * Supresses error messages resulting from Medium not present
1005  */
1006 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1007 {
1008         if (floppy->sense_key == 0x02 &&
1009             floppy->asc       == 0x3a &&
1010             floppy->ascq      == 0x00)
1011                 return 0;
1012         return 1;
1013 }
1014
1015 /*
1016  *      Issue a packet command
1017  */
1018 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1019 {
1020         idefloppy_floppy_t *floppy = drive->driver_data;
1021         ide_hwif_t *hwif = drive->hwif;
1022         atapi_feature_t feature;
1023         atapi_bcount_t bcount;
1024         ide_handler_t *pkt_xfer_routine;
1025
1026         if (floppy->failed_pc == NULL &&
1027             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1028                 floppy->failed_pc = pc;
1029         /* Set the current packet command */
1030         floppy->pc = pc;
1031
1032         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1033             test_bit(PC_ABORT, &pc->flags)) {
1034                 /*
1035                  *      We will "abort" retrying a packet command in case
1036                  *      a legitimate error code was received.
1037                  */
1038                 if (!test_bit(PC_ABORT, &pc->flags)) {
1039                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1040                                 if (idefloppy_should_report_error(floppy))
1041                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1042                                                "pc = %2x, key = %2x, "
1043                                                "asc = %2x, ascq = %2x\n",
1044                                                drive->name, pc->c[0],
1045                                                floppy->sense_key,
1046                                                floppy->asc, floppy->ascq);
1047                         }
1048                         /* Giving up */
1049                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1050                 }
1051                 floppy->failed_pc = NULL;
1052                 pc->callback(drive);
1053                 return ide_stopped;
1054         }
1055
1056         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1057
1058         pc->retries++;
1059         /* We haven't transferred any data yet */
1060         pc->actually_transferred = 0;
1061         pc->current_position = pc->buffer;
1062         bcount.all = min(pc->request_transfer, 63 * 1024);
1063
1064         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1065                 ide_dma_off(drive);
1066
1067         feature.all = 0;
1068
1069         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1070                 feature.b.dma = !hwif->dma_setup(drive);
1071
1072         if (IDE_CONTROL_REG)
1073                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1074         /* Use PIO/DMA */
1075         HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1076         HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1077         HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1078         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1079
1080         if (feature.b.dma) {    /* Begin DMA, if necessary */
1081                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1082                 hwif->dma_start(drive);
1083         }
1084
1085         /* Can we transfer the packet when we get the interrupt or wait? */
1086         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1087                 /* wait */
1088                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1089         } else {
1090                 /* immediate */
1091                 pkt_xfer_routine = &idefloppy_transfer_pc;
1092         }
1093
1094         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1095                 /* Issue the packet command */
1096                 ide_execute_command(drive, WIN_PACKETCMD,
1097                                 pkt_xfer_routine,
1098                                 IDEFLOPPY_WAIT_CMD,
1099                                 NULL);
1100                 return ide_started;
1101         } else {
1102                 /* Issue the packet command */
1103                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1104                 return (*pkt_xfer_routine) (drive);
1105         }
1106 }
1107
1108 static void idefloppy_rw_callback (ide_drive_t *drive)
1109 {
1110         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1111
1112         idefloppy_do_end_request(drive, 1, 0);
1113         return;
1114 }
1115
1116 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1117 {
1118         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1119                 "prevent = %d\n", prevent);
1120
1121         idefloppy_init_pc(pc);
1122         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1123         pc->c[4] = prevent;
1124 }
1125
1126 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1127 {
1128         idefloppy_init_pc(pc);
1129         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1130         pc->c[7] = 255;
1131         pc->c[8] = 255;
1132         pc->request_transfer = 255;
1133 }
1134
1135 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1136                                               int flags)
1137 {
1138         idefloppy_init_pc(pc);
1139         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1140         pc->c[1] = 0x17;
1141
1142         memset(pc->buffer, 0, 12);
1143         pc->buffer[1] = 0xA2;
1144         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1145
1146         if (flags & 1)                          /* Verify bit on... */
1147                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1148         pc->buffer[3] = 8;
1149
1150         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1151         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1152         pc->buffer_size=12;
1153         set_bit(PC_WRITING, &pc->flags);
1154 }
1155
1156 /*
1157  *      A mode sense command is used to "sense" floppy parameters.
1158  */
1159 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1160 {
1161         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1162
1163         idefloppy_init_pc(pc);
1164         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1165         pc->c[1] = 0;
1166         pc->c[2] = page_code + (type << 6);
1167
1168         switch (page_code) {
1169                 case IDEFLOPPY_CAPABILITIES_PAGE:
1170                         length += 12;
1171                         break;
1172                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1173                         length += 32;
1174                         break;
1175                 default:
1176                         printk(KERN_ERR "ide-floppy: unsupported page code "
1177                                 "in create_mode_sense_cmd\n");
1178         }
1179         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1180         pc->request_transfer = length;
1181 }
1182
1183 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1184 {
1185         idefloppy_init_pc(pc);
1186         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1187         pc->c[4] = start;
1188 }
1189
1190 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1191 {
1192         idefloppy_init_pc(pc);
1193         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1194 }
1195
1196 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1197 {
1198         int block = sector / floppy->bs_factor;
1199         int blocks = rq->nr_sectors / floppy->bs_factor;
1200         int cmd = rq_data_dir(rq);
1201
1202         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1203                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1204                 block, blocks);
1205
1206         idefloppy_init_pc(pc);
1207         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1208                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1209                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1210         } else {
1211                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1212                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1213         }
1214         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1215         pc->callback = &idefloppy_rw_callback;
1216         pc->rq = rq;
1217         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1218         if (rq->cmd_flags & REQ_RW)
1219                 set_bit(PC_WRITING, &pc->flags);
1220         pc->buffer = NULL;
1221         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1222         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1223 }
1224
1225 static void
1226 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1227 {
1228         idefloppy_init_pc(pc);
1229         pc->callback = &idefloppy_rw_callback;
1230         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1231         pc->rq = rq;
1232         pc->b_count = rq->data_len;
1233         if (rq->data_len && rq_data_dir(rq) == WRITE)
1234                 set_bit(PC_WRITING, &pc->flags);
1235         pc->buffer = rq->data;
1236         if (rq->bio)
1237                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1238
1239         /*
1240          * possibly problematic, doesn't look like ide-floppy correctly
1241          * handled scattered requests if dma fails...
1242          */
1243         pc->request_transfer = pc->buffer_size = rq->data_len;
1244 }
1245
1246 /*
1247  *      idefloppy_do_request is our request handling function.
1248  */
1249 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1250 {
1251         idefloppy_floppy_t *floppy = drive->driver_data;
1252         idefloppy_pc_t *pc;
1253         unsigned long block = (unsigned long)block_s;
1254
1255         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1256                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1257                         rq->flags, rq->errors);
1258         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1259                         "current_nr_sectors: %d\n", (long)rq->sector,
1260                         rq->nr_sectors, rq->current_nr_sectors);
1261
1262         if (rq->errors >= ERROR_MAX) {
1263                 if (floppy->failed_pc != NULL) {
1264                         if (idefloppy_should_report_error(floppy))
1265                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1266                                        " key = %2x, asc = %2x, ascq = %2x\n",
1267                                        drive->name, floppy->failed_pc->c[0],
1268                                        floppy->sense_key, floppy->asc, floppy->ascq);
1269                 }
1270                 else
1271                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1272                                 drive->name);
1273                 idefloppy_do_end_request(drive, 0, 0);
1274                 return ide_stopped;
1275         }
1276         if (blk_fs_request(rq)) {
1277                 if (((long)rq->sector % floppy->bs_factor) ||
1278                     (rq->nr_sectors % floppy->bs_factor)) {
1279                         printk("%s: unsupported r/w request size\n",
1280                                 drive->name);
1281                         idefloppy_do_end_request(drive, 0, 0);
1282                         return ide_stopped;
1283                 }
1284                 pc = idefloppy_next_pc_storage(drive);
1285                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1286         } else if (blk_special_request(rq)) {
1287                 pc = (idefloppy_pc_t *) rq->buffer;
1288         } else if (blk_pc_request(rq)) {
1289                 pc = idefloppy_next_pc_storage(drive);
1290                 idefloppy_blockpc_cmd(floppy, pc, rq);
1291         } else {
1292                 blk_dump_rq_flags(rq,
1293                         "ide-floppy: unsupported command in queue");
1294                 idefloppy_do_end_request(drive, 0, 0);
1295                 return ide_stopped;
1296         }
1297
1298         pc->rq = rq;
1299         return idefloppy_issue_pc(drive, pc);
1300 }
1301
1302 /*
1303  *      idefloppy_queue_pc_tail adds a special packet command request to the
1304  *      tail of the request queue, and waits for it to be serviced.
1305  */
1306 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1307 {
1308         struct ide_floppy_obj *floppy = drive->driver_data;
1309         struct request rq;
1310
1311         ide_init_drive_cmd (&rq);
1312         rq.buffer = (char *) pc;
1313         rq.cmd_type = REQ_TYPE_SPECIAL;
1314         rq.rq_disk = floppy->disk;
1315
1316         return ide_do_drive_cmd(drive, &rq, ide_wait);
1317 }
1318
1319 /*
1320  *      Look at the flexible disk page parameters. We will ignore the CHS
1321  *      capacity parameters and use the LBA parameters instead.
1322  */
1323 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1324 {
1325         idefloppy_floppy_t *floppy = drive->driver_data;
1326         idefloppy_pc_t pc;
1327         idefloppy_mode_parameter_header_t *header;
1328         idefloppy_flexible_disk_page_t *page;
1329         int capacity, lba_capacity;
1330
1331         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1332         if (idefloppy_queue_pc_tail(drive,&pc)) {
1333                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1334                         "page parameters\n");
1335                 return 1;
1336         }
1337         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1338         floppy->wp = header->wp;
1339         set_disk_ro(floppy->disk, floppy->wp);
1340         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1341
1342         page->transfer_rate = ntohs(page->transfer_rate);
1343         page->sector_size = ntohs(page->sector_size);
1344         page->cyls = ntohs(page->cyls);
1345         page->rpm = ntohs(page->rpm);
1346         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1347         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1348                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1349                                 "%d sector size, %d rpm\n",
1350                         drive->name, capacity / 1024, page->cyls,
1351                         page->heads, page->sectors,
1352                         page->transfer_rate / 8, page->sector_size, page->rpm);
1353
1354         floppy->flexible_disk_page = *page;
1355         drive->bios_cyl = page->cyls;
1356         drive->bios_head = page->heads;
1357         drive->bios_sect = page->sectors;
1358         lba_capacity = floppy->blocks * floppy->block_size;
1359         if (capacity < lba_capacity) {
1360                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1361                         "bytes, but the drive only handles %d\n",
1362                         drive->name, lba_capacity, capacity);
1363                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1364         }
1365         return 0;
1366 }
1367
1368 static int idefloppy_get_capability_page(ide_drive_t *drive)
1369 {
1370         idefloppy_floppy_t *floppy = drive->driver_data;
1371         idefloppy_pc_t pc;
1372         idefloppy_mode_parameter_header_t *header;
1373         idefloppy_capabilities_page_t *page;
1374
1375         floppy->srfp = 0;
1376         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1377                                                  MODE_SENSE_CURRENT);
1378
1379         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1380         if (idefloppy_queue_pc_tail(drive,&pc)) {
1381                 return 1;
1382         }
1383
1384         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1385         page= (idefloppy_capabilities_page_t *)(header+1);
1386         floppy->srfp = page->srfp;
1387         return (0);
1388 }
1389
1390 /*
1391  *      Determine if a media is present in the floppy drive, and if so,
1392  *      its LBA capacity.
1393  */
1394 static int idefloppy_get_capacity (ide_drive_t *drive)
1395 {
1396         idefloppy_floppy_t *floppy = drive->driver_data;
1397         idefloppy_pc_t pc;
1398         idefloppy_capacity_header_t *header;
1399         idefloppy_capacity_descriptor_t *descriptor;
1400         int i, descriptors, rc = 1, blocks, length;
1401
1402         drive->bios_cyl = 0;
1403         drive->bios_head = drive->bios_sect = 0;
1404         floppy->blocks = 0;
1405         floppy->bs_factor = 1;
1406         set_capacity(floppy->disk, 0);
1407
1408         idefloppy_create_read_capacity_cmd(&pc);
1409         if (idefloppy_queue_pc_tail(drive, &pc)) {
1410                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1411                 return 1;
1412         }
1413         header = (idefloppy_capacity_header_t *) pc.buffer;
1414         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1415         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1416
1417         for (i = 0; i < descriptors; i++, descriptor++) {
1418                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1419                 length = descriptor->length = ntohs(descriptor->length);
1420
1421                 if (!i)
1422                 {
1423                 switch (descriptor->dc) {
1424                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1425                 case CAPACITY_UNFORMATTED:
1426                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1427                                 /*
1428                                  * If it is not a clik drive, break out
1429                                  * (maintains previous driver behaviour)
1430                                  */
1431                                 break;
1432                 case CAPACITY_CURRENT:
1433                         /* Normal Zip/LS-120 disks */
1434                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1435                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1436                                         "sector size\n", drive->name,
1437                                         blocks * length / 1024, blocks, length);
1438                         floppy->capacity = *descriptor;
1439                         if (!length || length % 512) {
1440                                 printk(KERN_NOTICE "%s: %d bytes block size "
1441                                         "not supported\n", drive->name, length);
1442                         } else {
1443                                 floppy->blocks = blocks;
1444                                 floppy->block_size = length;
1445                                 if ((floppy->bs_factor = length / 512) != 1)
1446                                         printk(KERN_NOTICE "%s: warning: non "
1447                                                 "512 bytes block size not "
1448                                                 "fully supported\n",
1449                                                 drive->name);
1450                                 rc = 0;
1451                         }
1452                         break;
1453                 case CAPACITY_NO_CARTRIDGE:
1454                         /*
1455                          * This is a KERN_ERR so it appears on screen
1456                          * for the user to see
1457                          */
1458                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1459                         break;
1460                 case CAPACITY_INVALID:
1461                         printk(KERN_ERR "%s: Invalid capacity for disk "
1462                                 "in drive\n", drive->name);
1463                         break;
1464                 }
1465                 }
1466                 if (!i) {
1467                         debug_log( "Descriptor 0 Code: %d\n",
1468                                 descriptor->dc);
1469                 }
1470                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1471                         "sector size\n", i, blocks * length / 1024, blocks,
1472                         length);
1473         }
1474
1475         /* Clik! disk does not support get_flexible_disk_page */
1476         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1477                 (void) idefloppy_get_flexible_disk_page(drive);
1478         }
1479
1480         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1481         return rc;
1482 }
1483
1484 /*
1485 ** Obtain the list of formattable capacities.
1486 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1487 ** descriptors to userland, instead of our own structures.
1488 **
1489 ** Userland gives us the following structure:
1490 **
1491 ** struct idefloppy_format_capacities {
1492 **        int nformats;
1493 **        struct {
1494 **                int nblocks;
1495 **                int blocksize;
1496 **                } formats[];
1497 **        } ;
1498 **
1499 ** userland initializes nformats to the number of allocated formats[]
1500 ** records.  On exit we set nformats to the number of records we've
1501 ** actually initialized.
1502 **
1503 */
1504
1505 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1506 {
1507         idefloppy_pc_t pc;
1508         idefloppy_capacity_header_t *header;
1509         idefloppy_capacity_descriptor_t *descriptor;
1510         int i, descriptors, blocks, length;
1511         int u_array_size;
1512         int u_index;
1513         int __user *argp;
1514
1515         if (get_user(u_array_size, arg))
1516                 return (-EFAULT);
1517
1518         if (u_array_size <= 0)
1519                 return (-EINVAL);
1520
1521         idefloppy_create_read_capacity_cmd(&pc);
1522         if (idefloppy_queue_pc_tail(drive, &pc)) {
1523                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1524                 return (-EIO);
1525         }
1526         header = (idefloppy_capacity_header_t *) pc.buffer;
1527         descriptors = header->length /
1528                 sizeof(idefloppy_capacity_descriptor_t);
1529         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1530
1531         u_index = 0;
1532         argp = arg + 1;
1533
1534         /*
1535         ** We always skip the first capacity descriptor.  That's the
1536         ** current capacity.  We are interested in the remaining descriptors,
1537         ** the formattable capacities.
1538         */
1539
1540         for (i=0; i<descriptors; i++, descriptor++) {
1541                 if (u_index >= u_array_size)
1542                         break;  /* User-supplied buffer too small */
1543                 if (i == 0)
1544                         continue;       /* Skip the first descriptor */
1545
1546                 blocks = ntohl(descriptor->blocks);
1547                 length = ntohs(descriptor->length);
1548
1549                 if (put_user(blocks, argp))
1550                         return(-EFAULT);
1551                 ++argp;
1552
1553                 if (put_user(length, argp))
1554                         return (-EFAULT);
1555                 ++argp;
1556
1557                 ++u_index;
1558         }
1559
1560         if (put_user(u_index, arg))
1561                 return (-EFAULT);
1562         return (0);
1563 }
1564
1565 /*
1566 ** Send ATAPI_FORMAT_UNIT to the drive.
1567 **
1568 ** Userland gives us the following structure:
1569 **
1570 ** struct idefloppy_format_command {
1571 **        int nblocks;
1572 **        int blocksize;
1573 **        int flags;
1574 **        } ;
1575 **
1576 ** flags is a bitmask, currently, the only defined flag is:
1577 **
1578 **        0x01 - verify media after format.
1579 */
1580
1581 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1582 {
1583         int blocks;
1584         int length;
1585         int flags;
1586         idefloppy_pc_t pc;
1587
1588         if (get_user(blocks, arg) ||
1589             get_user(length, arg+1) ||
1590             get_user(flags, arg+2)) {
1591                 return (-EFAULT);
1592         }
1593
1594         /* Get the SFRP bit */
1595         (void) idefloppy_get_capability_page(drive);
1596         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1597         if (idefloppy_queue_pc_tail(drive, &pc)) {
1598                 return (-EIO);
1599         }
1600
1601         return (0);
1602 }
1603
1604 /*
1605 ** Get ATAPI_FORMAT_UNIT progress indication.
1606 **
1607 ** Userland gives a pointer to an int.  The int is set to a progress
1608 ** indicator 0-65536, with 65536=100%.
1609 **
1610 ** If the drive does not support format progress indication, we just check
1611 ** the dsc bit, and return either 0 or 65536.
1612 */
1613
1614 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1615 {
1616         idefloppy_floppy_t *floppy = drive->driver_data;
1617         idefloppy_pc_t pc;
1618         int progress_indication = 0x10000;
1619
1620         if (floppy->srfp) {
1621                 idefloppy_create_request_sense_cmd(&pc);
1622                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1623                         return (-EIO);
1624                 }
1625
1626                 if (floppy->sense_key == 2 &&
1627                     floppy->asc == 4 &&
1628                     floppy->ascq == 4) {
1629                         progress_indication = floppy->progress_indication;
1630                 }
1631                 /* Else assume format_unit has finished, and we're
1632                 ** at 0x10000 */
1633         } else {
1634                 unsigned long flags;
1635                 u8 stat;
1636
1637                 local_irq_save(flags);
1638                 stat = drive->hwif->INB(IDE_STATUS_REG);
1639                 local_irq_restore(flags);
1640
1641                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1642         }
1643         if (put_user(progress_indication, arg))
1644                 return (-EFAULT);
1645
1646         return (0);
1647 }
1648
1649 /*
1650  *      Return the current floppy capacity.
1651  */
1652 static sector_t idefloppy_capacity (ide_drive_t *drive)
1653 {
1654         idefloppy_floppy_t *floppy = drive->driver_data;
1655         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1656
1657         return capacity;
1658 }
1659
1660 /*
1661  *      idefloppy_identify_device checks if we can support a drive,
1662  *      based on the ATAPI IDENTIFY command results.
1663  */
1664 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1665 {
1666         struct idefloppy_id_gcw gcw;
1667 #if IDEFLOPPY_DEBUG_INFO
1668         u16 mask,i;
1669         char buffer[80];
1670 #endif /* IDEFLOPPY_DEBUG_INFO */
1671
1672         *((u16 *) &gcw) = id->config;
1673
1674 #ifdef CONFIG_PPC
1675         /* kludge for Apple PowerBook internal zip */
1676         if ((gcw.device_type == 5) &&
1677             !strstr(id->model, "CD-ROM") &&
1678             strstr(id->model, "ZIP"))
1679                 gcw.device_type = 0;
1680 #endif
1681
1682 #if IDEFLOPPY_DEBUG_INFO
1683         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1684         switch (gcw.protocol) {
1685                 case 0: case 1: sprintf(buffer, "ATA");break;
1686                 case 2: sprintf(buffer, "ATAPI");break;
1687                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1688         }
1689         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1690         switch (gcw.device_type) {
1691                 case 0: sprintf(buffer, "Direct-access Device");break;
1692                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1693                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1694                 case 5: sprintf(buffer, "CD-ROM Device");break;
1695                 case 6: sprintf(buffer, "Reserved");
1696                 case 7: sprintf(buffer, "Optical memory Device");break;
1697                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1698                 default: sprintf(buffer, "Reserved");
1699         }
1700         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1701         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1702         switch (gcw.drq_type) {
1703                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1704                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1705                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1706                 case 3: sprintf(buffer, "Reserved");break;
1707         }
1708         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1709         switch (gcw.packet_size) {
1710                 case 0: sprintf(buffer, "12 bytes");break;
1711                 case 1: sprintf(buffer, "16 bytes");break;
1712                 default: sprintf(buffer, "Reserved");break;
1713         }
1714         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1715         printk(KERN_INFO "Model: %.40s\n",id->model);
1716         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1717         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1718         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1719         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1720         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1721         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1722         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1723         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1724         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1725         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1726         printk(KERN_INFO "Single Word DMA supported modes:\n");
1727         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1728                 if (id->dma_1word & mask)
1729                         printk(KERN_INFO "   Mode %d%s\n", i,
1730                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1731         }
1732         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1733         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1734                 if (id->dma_mword & mask)
1735                         printk(KERN_INFO "   Mode %d%s\n", i,
1736                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1737         }
1738         if (id->field_valid & 0x0002) {
1739                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1740                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1741                 if (id->eide_dma_min == 0)
1742                         sprintf(buffer, "Not supported");
1743                 else
1744                         sprintf(buffer, "%d ns",id->eide_dma_min);
1745                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1746                 if (id->eide_dma_time == 0)
1747                         sprintf(buffer, "Not supported");
1748                 else
1749                         sprintf(buffer, "%d ns",id->eide_dma_time);
1750                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1751                 if (id->eide_pio == 0)
1752                         sprintf(buffer, "Not supported");
1753                 else
1754                         sprintf(buffer, "%d ns",id->eide_pio);
1755                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1756                         buffer);
1757                 if (id->eide_pio_iordy == 0)
1758                         sprintf(buffer, "Not supported");
1759                 else
1760                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1761                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1762         } else
1763                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1764 #endif /* IDEFLOPPY_DEBUG_INFO */
1765
1766         if (gcw.protocol != 2)
1767                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1768         else if (gcw.device_type != 0)
1769                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1770         else if (!gcw.removable)
1771                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1772         else if (gcw.drq_type == 3) {
1773                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1774         } else if (gcw.packet_size != 0) {
1775                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1776         } else
1777                 return 1;
1778         return 0;
1779 }
1780
1781 #ifdef CONFIG_IDE_PROC_FS
1782 static void idefloppy_add_settings(ide_drive_t *drive)
1783 {
1784         idefloppy_floppy_t *floppy = drive->driver_data;
1785
1786 /*
1787  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1788  */
1789         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1790         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1791         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1792         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1793 }
1794 #else
1795 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1796 #endif
1797
1798 /*
1799  *      Driver initialization.
1800  */
1801 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1802 {
1803         struct idefloppy_id_gcw gcw;
1804
1805         *((u16 *) &gcw) = drive->id->config;
1806         floppy->pc = floppy->pc_stack;
1807         if (gcw.drq_type == 1)
1808                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1809         /*
1810          *      We used to check revisions here. At this point however
1811          *      I'm giving up. Just assume they are all broken, its easier.
1812          *
1813          *      The actual reason for the workarounds was likely
1814          *      a driver bug after all rather than a firmware bug,
1815          *      and the workaround below used to hide it. It should
1816          *      be fixed as of version 1.9, but to be on the safe side
1817          *      we'll leave the limitation below for the 2.2.x tree.
1818          */
1819
1820         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1821                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1822                 /* This value will be visible in the /proc/ide/hdx/settings */
1823                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1824                 blk_queue_max_sectors(drive->queue, 64);
1825         }
1826
1827         /*
1828         *      Guess what?  The IOMEGA Clik! drive also needs the
1829         *      above fix.  It makes nasty clicking noises without
1830         *      it, so please don't remove this.
1831         */
1832         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1833                 blk_queue_max_sectors(drive->queue, 64);
1834                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1835         }
1836
1837
1838         (void) idefloppy_get_capacity(drive);
1839         idefloppy_add_settings(drive);
1840 }
1841
1842 static void ide_floppy_remove(ide_drive_t *drive)
1843 {
1844         idefloppy_floppy_t *floppy = drive->driver_data;
1845         struct gendisk *g = floppy->disk;
1846
1847         ide_proc_unregister_driver(drive, floppy->driver);
1848
1849         del_gendisk(g);
1850
1851         ide_floppy_put(floppy);
1852 }
1853
1854 static void ide_floppy_release(struct kref *kref)
1855 {
1856         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1857         ide_drive_t *drive = floppy->drive;
1858         struct gendisk *g = floppy->disk;
1859
1860         drive->driver_data = NULL;
1861         g->private_data = NULL;
1862         put_disk(g);
1863         kfree(floppy);
1864 }
1865
1866 #ifdef CONFIG_IDE_PROC_FS
1867 static int proc_idefloppy_read_capacity
1868         (char *page, char **start, off_t off, int count, int *eof, void *data)
1869 {
1870         ide_drive_t*drive = (ide_drive_t *)data;
1871         int len;
1872
1873         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1874         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1875 }
1876
1877 static ide_proc_entry_t idefloppy_proc[] = {
1878         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1879         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1880         { NULL, 0, NULL, NULL }
1881 };
1882 #endif  /* CONFIG_IDE_PROC_FS */
1883
1884 static int ide_floppy_probe(ide_drive_t *);
1885
1886 static ide_driver_t idefloppy_driver = {
1887         .gen_driver = {
1888                 .owner          = THIS_MODULE,
1889                 .name           = "ide-floppy",
1890                 .bus            = &ide_bus_type,
1891         },
1892         .probe                  = ide_floppy_probe,
1893         .remove                 = ide_floppy_remove,
1894         .version                = IDEFLOPPY_VERSION,
1895         .media                  = ide_floppy,
1896         .supports_dsc_overlap   = 0,
1897         .do_request             = idefloppy_do_request,
1898         .end_request            = idefloppy_do_end_request,
1899         .error                  = __ide_error,
1900         .abort                  = __ide_abort,
1901 #ifdef CONFIG_IDE_PROC_FS
1902         .proc                   = idefloppy_proc,
1903 #endif
1904 };
1905
1906 static int idefloppy_open(struct inode *inode, struct file *filp)
1907 {
1908         struct gendisk *disk = inode->i_bdev->bd_disk;
1909         struct ide_floppy_obj *floppy;
1910         ide_drive_t *drive;
1911         idefloppy_pc_t pc;
1912         int ret = 0;
1913
1914         debug_log(KERN_INFO "Reached idefloppy_open\n");
1915
1916         if (!(floppy = ide_floppy_get(disk)))
1917                 return -ENXIO;
1918
1919         drive = floppy->drive;
1920
1921         floppy->openers++;
1922
1923         if (floppy->openers == 1) {
1924                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1925                 /* Just in case */
1926
1927                 idefloppy_create_test_unit_ready_cmd(&pc);
1928                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1929                         idefloppy_create_start_stop_cmd(&pc, 1);
1930                         (void) idefloppy_queue_pc_tail(drive, &pc);
1931                 }
1932
1933                 if (idefloppy_get_capacity (drive)
1934                    && (filp->f_flags & O_NDELAY) == 0
1935                     /*
1936                     ** Allow O_NDELAY to open a drive without a disk, or with
1937                     ** an unreadable disk, so that we can get the format
1938                     ** capacity of the drive or begin the format - Sam
1939                     */
1940                     ) {
1941                         ret = -EIO;
1942                         goto out_put_floppy;
1943                 }
1944
1945                 if (floppy->wp && (filp->f_mode & 2)) {
1946                         ret = -EROFS;
1947                         goto out_put_floppy;
1948                 }
1949                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1950                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1951                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1952                         idefloppy_create_prevent_cmd(&pc, 1);
1953                         (void) idefloppy_queue_pc_tail(drive, &pc);
1954                 }
1955                 check_disk_change(inode->i_bdev);
1956         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1957                 ret = -EBUSY;
1958                 goto out_put_floppy;
1959         }
1960         return 0;
1961
1962 out_put_floppy:
1963         floppy->openers--;
1964         ide_floppy_put(floppy);
1965         return ret;
1966 }
1967
1968 static int idefloppy_release(struct inode *inode, struct file *filp)
1969 {
1970         struct gendisk *disk = inode->i_bdev->bd_disk;
1971         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1972         ide_drive_t *drive = floppy->drive;
1973         idefloppy_pc_t pc;
1974
1975         debug_log(KERN_INFO "Reached idefloppy_release\n");
1976
1977         if (floppy->openers == 1) {
1978                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1979                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1980                         idefloppy_create_prevent_cmd(&pc, 0);
1981                         (void) idefloppy_queue_pc_tail(drive, &pc);
1982                 }
1983
1984                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1985         }
1986
1987         floppy->openers--;
1988
1989         ide_floppy_put(floppy);
1990
1991         return 0;
1992 }
1993
1994 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1995 {
1996         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1997         ide_drive_t *drive = floppy->drive;
1998
1999         geo->heads = drive->bios_head;
2000         geo->sectors = drive->bios_sect;
2001         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2002         return 0;
2003 }
2004
2005 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2006                         unsigned int cmd, unsigned long arg)
2007 {
2008         struct block_device *bdev = inode->i_bdev;
2009         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2010         ide_drive_t *drive = floppy->drive;
2011         void __user *argp = (void __user *)arg;
2012         int err;
2013         int prevent = (arg) ? 1 : 0;
2014         idefloppy_pc_t pc;
2015
2016         switch (cmd) {
2017         case CDROMEJECT:
2018                 prevent = 0;
2019                 /* fall through */
2020         case CDROM_LOCKDOOR:
2021                 if (floppy->openers > 1)
2022                         return -EBUSY;
2023
2024                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2025                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2026                         idefloppy_create_prevent_cmd(&pc, prevent);
2027                         (void) idefloppy_queue_pc_tail(drive, &pc);
2028                 }
2029                 if (cmd == CDROMEJECT) {
2030                         idefloppy_create_start_stop_cmd(&pc, 2);
2031                         (void) idefloppy_queue_pc_tail(drive, &pc);
2032                 }
2033                 return 0;
2034         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2035                 return 0;
2036         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2037                 return idefloppy_get_format_capacities(drive, argp);
2038         case IDEFLOPPY_IOCTL_FORMAT_START:
2039
2040                 if (!(file->f_mode & 2))
2041                         return -EPERM;
2042
2043                 if (floppy->openers > 1) {
2044                         /* Don't format if someone is using the disk */
2045
2046                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2047                                   &floppy->flags);
2048                         return -EBUSY;
2049                 }
2050
2051                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2052
2053                 err = idefloppy_begin_format(drive, argp);
2054                 if (err)
2055                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2056                 return err;
2057                 /*
2058                 ** Note, the bit will be cleared when the device is
2059                 ** closed.  This is the cleanest way to handle the
2060                 ** situation where the drive does not support
2061                 ** format progress reporting.
2062                 */
2063         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2064                 return idefloppy_get_format_progress(drive, argp);
2065         }
2066
2067         /*
2068          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2069          * and CDROM_SEND_PACKET (legacy) ioctls
2070          */
2071         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2072                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2073                                         bdev->bd_disk, cmd, argp);
2074         else
2075                 err = -ENOTTY;
2076
2077         if (err == -ENOTTY)
2078                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2079
2080         return err;
2081 }
2082
2083 static int idefloppy_media_changed(struct gendisk *disk)
2084 {
2085         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2086         ide_drive_t *drive = floppy->drive;
2087
2088         /* do not scan partitions twice if this is a removable device */
2089         if (drive->attach) {
2090                 drive->attach = 0;
2091                 return 0;
2092         }
2093         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2094 }
2095
2096 static int idefloppy_revalidate_disk(struct gendisk *disk)
2097 {
2098         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2099         set_capacity(disk, idefloppy_capacity(floppy->drive));
2100         return 0;
2101 }
2102
2103 static struct block_device_operations idefloppy_ops = {
2104         .owner          = THIS_MODULE,
2105         .open           = idefloppy_open,
2106         .release        = idefloppy_release,
2107         .ioctl          = idefloppy_ioctl,
2108         .getgeo         = idefloppy_getgeo,
2109         .media_changed  = idefloppy_media_changed,
2110         .revalidate_disk= idefloppy_revalidate_disk
2111 };
2112
2113 static int ide_floppy_probe(ide_drive_t *drive)
2114 {
2115         idefloppy_floppy_t *floppy;
2116         struct gendisk *g;
2117
2118         if (!strstr("ide-floppy", drive->driver_req))
2119                 goto failed;
2120         if (!drive->present)
2121                 goto failed;
2122         if (drive->media != ide_floppy)
2123                 goto failed;
2124         if (!idefloppy_identify_device (drive, drive->id)) {
2125                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2126                 goto failed;
2127         }
2128         if (drive->scsi) {
2129                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2130                 goto failed;
2131         }
2132         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2133                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2134                 goto failed;
2135         }
2136
2137         g = alloc_disk(1 << PARTN_BITS);
2138         if (!g)
2139                 goto out_free_floppy;
2140
2141         ide_init_disk(g, drive);
2142
2143         ide_proc_register_driver(drive, &idefloppy_driver);
2144
2145         kref_init(&floppy->kref);
2146
2147         floppy->drive = drive;
2148         floppy->driver = &idefloppy_driver;
2149         floppy->disk = g;
2150
2151         g->private_data = &floppy->driver;
2152
2153         drive->driver_data = floppy;
2154
2155         idefloppy_setup (drive, floppy);
2156
2157         g->minors = 1 << PARTN_BITS;
2158         g->driverfs_dev = &drive->gendev;
2159         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2160         g->fops = &idefloppy_ops;
2161         drive->attach = 1;
2162         add_disk(g);
2163         return 0;
2164
2165 out_free_floppy:
2166         kfree(floppy);
2167 failed:
2168         return -ENODEV;
2169 }
2170
2171 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2172
2173 static void __exit idefloppy_exit (void)
2174 {
2175         driver_unregister(&idefloppy_driver.gen_driver);
2176 }
2177
2178 static int __init idefloppy_init(void)
2179 {
2180         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2181         return driver_register(&idefloppy_driver.gen_driver);
2182 }
2183
2184 MODULE_ALIAS("ide:*m-floppy*");
2185 module_init(idefloppy_init);
2186 module_exit(idefloppy_exit);
2187 MODULE_LICENSE("GPL");