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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         ide_hwif_t *hwif = drive->hwif;
 791         idefloppy_pc_t *pc = floppy->pc;
 792         struct request *rq = pc->rq;
 793         unsigned int temp;
 794         u16 bcount;
 795         u8 stat, ireason;
 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 = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 852                   hwif->INB(IDE_BCOUNTL_REG);
 853         /* on this interrupt */
 854         ireason = hwif->INB(IDE_IREASON_REG);
 855
 856         if (ireason & CD) {
 857                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 858                 return ide_do_reset(drive);
 859         }
 860         if (((ireason & IO) == 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 & IO) ? "Write" : "Read");
 864                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 865                                 (ireason & 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;
 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);
 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->atapi_output_bytes(drive, pc->current_position,
 893                                                  bcount);
 894                 else
 895                         idefloppy_output_buffers(drive, pc, bcount);
 896         } else {
 897                 if (pc->buffer != NULL)
 898                         /* Read the current buffer */
 899                         hwif->atapi_input_bytes(drive, pc->current_position,
 900                                                 bcount);
 901                 else
 902                         idefloppy_input_buffers(drive, pc, bcount);
 903         }
 904         /* Update the current position */
 905         pc->actually_transferred += bcount;
 906         pc->current_position += bcount;
 907
 908         BUG_ON(HWGROUP(drive)->handler != NULL);
 909         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 910         return ide_started;
 911 }
 912
 913 /*
 914  * This is the original routine that did the packet transfer.
 915  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 916  * for that drive below. The algorithm is chosen based on drive type
 917  */
 918 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 919 {
 920         ide_startstop_t startstop;
 921         idefloppy_floppy_t *floppy = drive->driver_data;
 922         u8 ireason;
 923
 924         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 925                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 926                                 "initiated yet DRQ isn't asserted\n");
 927                 return startstop;
 928         }
 929         ireason = drive->hwif->INB(IDE_IREASON_REG);
 930         if ((ireason & CD) == 0 || (ireason & IO)) {
 931                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 932                                 "issuing a packet command\n");
 933                 return ide_do_reset(drive);
 934         }
 935         BUG_ON(HWGROUP(drive)->handler != NULL);
 936         /* Set the interrupt routine */
 937         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 938         /* Send the actual packet */
 939         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 940         return ide_started;
 941 }
 942
 943
 944 /*
 945  * What we have here is a classic case of a top half / bottom half
 946  * interrupt service routine. In interrupt mode, the device sends
 947  * an interrupt to signal it's ready to receive a packet. However,
 948  * we need to delay about 2-3 ticks before issuing the packet or we
 949  * gets in trouble.
 950  *
 951  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 952  * directly). In either case, when the device says it's ready for a
 953  * packet, we schedule the packet transfer to occur about 2-3 ticks
 954  * later in transfer_pc2.
 955  */
 956 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 957 {
 958         idefloppy_floppy_t *floppy = drive->driver_data;
 959
 960         /* Send the actual packet */
 961         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 962         /* Timeout for the packet command */
 963         return IDEFLOPPY_WAIT_CMD;
 964 }
 965
 966 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 967 {
 968         idefloppy_floppy_t *floppy = drive->driver_data;
 969         ide_startstop_t startstop;
 970         u8 ireason;
 971
 972         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 973                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 974                                 "initiated yet DRQ isn't asserted\n");
 975                 return startstop;
 976         }
 977         ireason = drive->hwif->INB(IDE_IREASON_REG);
 978         if ((ireason & CD) == 0 || (ireason & IO)) {
 979                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 980                                 "while issuing a packet command\n");
 981                 return ide_do_reset(drive);
 982         }
 983         /*
 984          * The following delay solves a problem with ATAPI Zip 100 drives
 985          * where the Busy flag was apparently being deasserted before the
 986          * unit was ready to receive data. This was happening on a
 987          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 988          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 989          * used until after the packet is moved in about 50 msec.
 990          */
 991         BUG_ON(HWGROUP(drive)->handler != NULL);
 992         ide_set_handler(drive,
 993           &idefloppy_pc_intr,           /* service routine for packet command */
 994           floppy->ticks,                /* wait this long before "failing" */
 995           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 996         return ide_started;
 997 }
 998
 999 /**
1000  * idefloppy_should_report_error()
1001  *
1002  * Supresses error messages resulting from Medium not present
1003  */
1004 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1005 {
1006         if (floppy->sense_key == 0x02 &&
1007             floppy->asc       == 0x3a &&
1008             floppy->ascq      == 0x00)
1009                 return 0;
1010         return 1;
1011 }
1012
1013 /*
1014  *      Issue a packet command
1015  */
1016 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1017 {
1018         idefloppy_floppy_t *floppy = drive->driver_data;
1019         ide_hwif_t *hwif = drive->hwif;
1020         ide_handler_t *pkt_xfer_routine;
1021         u16 bcount;
1022         u8 dma;
1023
1024         if (floppy->failed_pc == NULL &&
1025             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1026                 floppy->failed_pc = pc;
1027         /* Set the current packet command */
1028         floppy->pc = pc;
1029
1030         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1031             test_bit(PC_ABORT, &pc->flags)) {
1032                 /*
1033                  *      We will "abort" retrying a packet command in case
1034                  *      a legitimate error code was received.
1035                  */
1036                 if (!test_bit(PC_ABORT, &pc->flags)) {
1037                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1038                                 if (idefloppy_should_report_error(floppy))
1039                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1040                                                "pc = %2x, key = %2x, "
1041                                                "asc = %2x, ascq = %2x\n",
1042                                                drive->name, pc->c[0],
1043                                                floppy->sense_key,
1044                                                floppy->asc, floppy->ascq);
1045                         }
1046                         /* Giving up */
1047                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1048                 }
1049                 floppy->failed_pc = NULL;
1050                 pc->callback(drive);
1051                 return ide_stopped;
1052         }
1053
1054         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1055
1056         pc->retries++;
1057         /* We haven't transferred any data yet */
1058         pc->actually_transferred = 0;
1059         pc->current_position = pc->buffer;
1060         bcount = min(pc->request_transfer, 63 * 1024);
1061
1062         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1063                 ide_dma_off(drive);
1064
1065         dma = 0;
1066
1067         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1068                 dma = !hwif->dma_setup(drive);
1069
1070         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
1071                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
1072
1073         if (dma) {      /* Begin DMA, if necessary */
1074                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1075                 hwif->dma_start(drive);
1076         }
1077
1078         /* Can we transfer the packet when we get the interrupt or wait? */
1079         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1080                 /* wait */
1081                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1082         } else {
1083                 /* immediate */
1084                 pkt_xfer_routine = &idefloppy_transfer_pc;
1085         }
1086
1087         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1088                 /* Issue the packet command */
1089                 ide_execute_command(drive, WIN_PACKETCMD,
1090                                 pkt_xfer_routine,
1091                                 IDEFLOPPY_WAIT_CMD,
1092                                 NULL);
1093                 return ide_started;
1094         } else {
1095                 /* Issue the packet command */
1096                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1097                 return (*pkt_xfer_routine) (drive);
1098         }
1099 }
1100
1101 static void idefloppy_rw_callback (ide_drive_t *drive)
1102 {
1103         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1104
1105         idefloppy_do_end_request(drive, 1, 0);
1106         return;
1107 }
1108
1109 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1110 {
1111         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1112                 "prevent = %d\n", prevent);
1113
1114         idefloppy_init_pc(pc);
1115         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1116         pc->c[4] = prevent;
1117 }
1118
1119 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1120 {
1121         idefloppy_init_pc(pc);
1122         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1123         pc->c[7] = 255;
1124         pc->c[8] = 255;
1125         pc->request_transfer = 255;
1126 }
1127
1128 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1129                                               int flags)
1130 {
1131         idefloppy_init_pc(pc);
1132         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1133         pc->c[1] = 0x17;
1134
1135         memset(pc->buffer, 0, 12);
1136         pc->buffer[1] = 0xA2;
1137         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1138
1139         if (flags & 1)                          /* Verify bit on... */
1140                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1141         pc->buffer[3] = 8;
1142
1143         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1144         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1145         pc->buffer_size=12;
1146         set_bit(PC_WRITING, &pc->flags);
1147 }
1148
1149 /*
1150  *      A mode sense command is used to "sense" floppy parameters.
1151  */
1152 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1153 {
1154         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1155
1156         idefloppy_init_pc(pc);
1157         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1158         pc->c[1] = 0;
1159         pc->c[2] = page_code + (type << 6);
1160
1161         switch (page_code) {
1162                 case IDEFLOPPY_CAPABILITIES_PAGE:
1163                         length += 12;
1164                         break;
1165                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1166                         length += 32;
1167                         break;
1168                 default:
1169                         printk(KERN_ERR "ide-floppy: unsupported page code "
1170                                 "in create_mode_sense_cmd\n");
1171         }
1172         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1173         pc->request_transfer = length;
1174 }
1175
1176 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1177 {
1178         idefloppy_init_pc(pc);
1179         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1180         pc->c[4] = start;
1181 }
1182
1183 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1184 {
1185         idefloppy_init_pc(pc);
1186         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1187 }
1188
1189 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1190 {
1191         int block = sector / floppy->bs_factor;
1192         int blocks = rq->nr_sectors / floppy->bs_factor;
1193         int cmd = rq_data_dir(rq);
1194
1195         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1196                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1197                 block, blocks);
1198
1199         idefloppy_init_pc(pc);
1200         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1201                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1202                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1203         } else {
1204                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1205                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1206         }
1207         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1208         pc->callback = &idefloppy_rw_callback;
1209         pc->rq = rq;
1210         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1211         if (rq->cmd_flags & REQ_RW)
1212                 set_bit(PC_WRITING, &pc->flags);
1213         pc->buffer = NULL;
1214         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1215         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1216 }
1217
1218 static void
1219 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1220 {
1221         idefloppy_init_pc(pc);
1222         pc->callback = &idefloppy_rw_callback;
1223         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1224         pc->rq = rq;
1225         pc->b_count = rq->data_len;
1226         if (rq->data_len && rq_data_dir(rq) == WRITE)
1227                 set_bit(PC_WRITING, &pc->flags);
1228         pc->buffer = rq->data;
1229         if (rq->bio)
1230                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1231
1232         /*
1233          * possibly problematic, doesn't look like ide-floppy correctly
1234          * handled scattered requests if dma fails...
1235          */
1236         pc->request_transfer = pc->buffer_size = rq->data_len;
1237 }
1238
1239 /*
1240  *      idefloppy_do_request is our request handling function.
1241  */
1242 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1243 {
1244         idefloppy_floppy_t *floppy = drive->driver_data;
1245         idefloppy_pc_t *pc;
1246         unsigned long block = (unsigned long)block_s;
1247
1248         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1249                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1250                         rq->flags, rq->errors);
1251         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1252                         "current_nr_sectors: %d\n", (long)rq->sector,
1253                         rq->nr_sectors, rq->current_nr_sectors);
1254
1255         if (rq->errors >= ERROR_MAX) {
1256                 if (floppy->failed_pc != NULL) {
1257                         if (idefloppy_should_report_error(floppy))
1258                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1259                                        " key = %2x, asc = %2x, ascq = %2x\n",
1260                                        drive->name, floppy->failed_pc->c[0],
1261                                        floppy->sense_key, floppy->asc, floppy->ascq);
1262                 }
1263                 else
1264                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1265                                 drive->name);
1266                 idefloppy_do_end_request(drive, 0, 0);
1267                 return ide_stopped;
1268         }
1269         if (blk_fs_request(rq)) {
1270                 if (((long)rq->sector % floppy->bs_factor) ||
1271                     (rq->nr_sectors % floppy->bs_factor)) {
1272                         printk("%s: unsupported r/w request size\n",
1273                                 drive->name);
1274                         idefloppy_do_end_request(drive, 0, 0);
1275                         return ide_stopped;
1276                 }
1277                 pc = idefloppy_next_pc_storage(drive);
1278                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1279         } else if (blk_special_request(rq)) {
1280                 pc = (idefloppy_pc_t *) rq->buffer;
1281         } else if (blk_pc_request(rq)) {
1282                 pc = idefloppy_next_pc_storage(drive);
1283                 idefloppy_blockpc_cmd(floppy, pc, rq);
1284         } else {
1285                 blk_dump_rq_flags(rq,
1286                         "ide-floppy: unsupported command in queue");
1287                 idefloppy_do_end_request(drive, 0, 0);
1288                 return ide_stopped;
1289         }
1290
1291         pc->rq = rq;
1292         return idefloppy_issue_pc(drive, pc);
1293 }
1294
1295 /*
1296  *      idefloppy_queue_pc_tail adds a special packet command request to the
1297  *      tail of the request queue, and waits for it to be serviced.
1298  */
1299 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1300 {
1301         struct ide_floppy_obj *floppy = drive->driver_data;
1302         struct request rq;
1303
1304         ide_init_drive_cmd (&rq);
1305         rq.buffer = (char *) pc;
1306         rq.cmd_type = REQ_TYPE_SPECIAL;
1307         rq.rq_disk = floppy->disk;
1308
1309         return ide_do_drive_cmd(drive, &rq, ide_wait);
1310 }
1311
1312 /*
1313  *      Look at the flexible disk page parameters. We will ignore the CHS
1314  *      capacity parameters and use the LBA parameters instead.
1315  */
1316 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1317 {
1318         idefloppy_floppy_t *floppy = drive->driver_data;
1319         idefloppy_pc_t pc;
1320         idefloppy_mode_parameter_header_t *header;
1321         idefloppy_flexible_disk_page_t *page;
1322         int capacity, lba_capacity;
1323
1324         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1325         if (idefloppy_queue_pc_tail(drive,&pc)) {
1326                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1327                         "page parameters\n");
1328                 return 1;
1329         }
1330         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1331         floppy->wp = header->wp;
1332         set_disk_ro(floppy->disk, floppy->wp);
1333         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1334
1335         page->transfer_rate = ntohs(page->transfer_rate);
1336         page->sector_size = ntohs(page->sector_size);
1337         page->cyls = ntohs(page->cyls);
1338         page->rpm = ntohs(page->rpm);
1339         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1340         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1341                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1342                                 "%d sector size, %d rpm\n",
1343                         drive->name, capacity / 1024, page->cyls,
1344                         page->heads, page->sectors,
1345                         page->transfer_rate / 8, page->sector_size, page->rpm);
1346
1347         floppy->flexible_disk_page = *page;
1348         drive->bios_cyl = page->cyls;
1349         drive->bios_head = page->heads;
1350         drive->bios_sect = page->sectors;
1351         lba_capacity = floppy->blocks * floppy->block_size;
1352         if (capacity < lba_capacity) {
1353                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1354                         "bytes, but the drive only handles %d\n",
1355                         drive->name, lba_capacity, capacity);
1356                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1357         }
1358         return 0;
1359 }
1360
1361 static int idefloppy_get_capability_page(ide_drive_t *drive)
1362 {
1363         idefloppy_floppy_t *floppy = drive->driver_data;
1364         idefloppy_pc_t pc;
1365         idefloppy_mode_parameter_header_t *header;
1366         idefloppy_capabilities_page_t *page;
1367
1368         floppy->srfp = 0;
1369         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1370                                                  MODE_SENSE_CURRENT);
1371
1372         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1373         if (idefloppy_queue_pc_tail(drive,&pc)) {
1374                 return 1;
1375         }
1376
1377         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1378         page= (idefloppy_capabilities_page_t *)(header+1);
1379         floppy->srfp = page->srfp;
1380         return (0);
1381 }
1382
1383 /*
1384  *      Determine if a media is present in the floppy drive, and if so,
1385  *      its LBA capacity.
1386  */
1387 static int idefloppy_get_capacity (ide_drive_t *drive)
1388 {
1389         idefloppy_floppy_t *floppy = drive->driver_data;
1390         idefloppy_pc_t pc;
1391         idefloppy_capacity_header_t *header;
1392         idefloppy_capacity_descriptor_t *descriptor;
1393         int i, descriptors, rc = 1, blocks, length;
1394
1395         drive->bios_cyl = 0;
1396         drive->bios_head = drive->bios_sect = 0;
1397         floppy->blocks = 0;
1398         floppy->bs_factor = 1;
1399         set_capacity(floppy->disk, 0);
1400
1401         idefloppy_create_read_capacity_cmd(&pc);
1402         if (idefloppy_queue_pc_tail(drive, &pc)) {
1403                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1404                 return 1;
1405         }
1406         header = (idefloppy_capacity_header_t *) pc.buffer;
1407         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1408         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1409
1410         for (i = 0; i < descriptors; i++, descriptor++) {
1411                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1412                 length = descriptor->length = ntohs(descriptor->length);
1413
1414                 if (!i)
1415                 {
1416                 switch (descriptor->dc) {
1417                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1418                 case CAPACITY_UNFORMATTED:
1419                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1420                                 /*
1421                                  * If it is not a clik drive, break out
1422                                  * (maintains previous driver behaviour)
1423                                  */
1424                                 break;
1425                 case CAPACITY_CURRENT:
1426                         /* Normal Zip/LS-120 disks */
1427                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1428                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1429                                         "sector size\n", drive->name,
1430                                         blocks * length / 1024, blocks, length);
1431                         floppy->capacity = *descriptor;
1432                         if (!length || length % 512) {
1433                                 printk(KERN_NOTICE "%s: %d bytes block size "
1434                                         "not supported\n", drive->name, length);
1435                         } else {
1436                                 floppy->blocks = blocks;
1437                                 floppy->block_size = length;
1438                                 if ((floppy->bs_factor = length / 512) != 1)
1439                                         printk(KERN_NOTICE "%s: warning: non "
1440                                                 "512 bytes block size not "
1441                                                 "fully supported\n",
1442                                                 drive->name);
1443                                 rc = 0;
1444                         }
1445                         break;
1446                 case CAPACITY_NO_CARTRIDGE:
1447                         /*
1448                          * This is a KERN_ERR so it appears on screen
1449                          * for the user to see
1450                          */
1451                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1452                         break;
1453                 case CAPACITY_INVALID:
1454                         printk(KERN_ERR "%s: Invalid capacity for disk "
1455                                 "in drive\n", drive->name);
1456                         break;
1457                 }
1458                 }
1459                 if (!i) {
1460                         debug_log( "Descriptor 0 Code: %d\n",
1461                                 descriptor->dc);
1462                 }
1463                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1464                         "sector size\n", i, blocks * length / 1024, blocks,
1465                         length);
1466         }
1467
1468         /* Clik! disk does not support get_flexible_disk_page */
1469         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1470                 (void) idefloppy_get_flexible_disk_page(drive);
1471         }
1472
1473         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1474         return rc;
1475 }
1476
1477 /*
1478 ** Obtain the list of formattable capacities.
1479 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1480 ** descriptors to userland, instead of our own structures.
1481 **
1482 ** Userland gives us the following structure:
1483 **
1484 ** struct idefloppy_format_capacities {
1485 **        int nformats;
1486 **        struct {
1487 **                int nblocks;
1488 **                int blocksize;
1489 **                } formats[];
1490 **        } ;
1491 **
1492 ** userland initializes nformats to the number of allocated formats[]
1493 ** records.  On exit we set nformats to the number of records we've
1494 ** actually initialized.
1495 **
1496 */
1497
1498 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1499 {
1500         idefloppy_pc_t pc;
1501         idefloppy_capacity_header_t *header;
1502         idefloppy_capacity_descriptor_t *descriptor;
1503         int i, descriptors, blocks, length;
1504         int u_array_size;
1505         int u_index;
1506         int __user *argp;
1507
1508         if (get_user(u_array_size, arg))
1509                 return (-EFAULT);
1510
1511         if (u_array_size <= 0)
1512                 return (-EINVAL);
1513
1514         idefloppy_create_read_capacity_cmd(&pc);
1515         if (idefloppy_queue_pc_tail(drive, &pc)) {
1516                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1517                 return (-EIO);
1518         }
1519         header = (idefloppy_capacity_header_t *) pc.buffer;
1520         descriptors = header->length /
1521                 sizeof(idefloppy_capacity_descriptor_t);
1522         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1523
1524         u_index = 0;
1525         argp = arg + 1;
1526
1527         /*
1528         ** We always skip the first capacity descriptor.  That's the
1529         ** current capacity.  We are interested in the remaining descriptors,
1530         ** the formattable capacities.
1531         */
1532
1533         for (i=0; i<descriptors; i++, descriptor++) {
1534                 if (u_index >= u_array_size)
1535                         break;  /* User-supplied buffer too small */
1536                 if (i == 0)
1537                         continue;       /* Skip the first descriptor */
1538
1539                 blocks = ntohl(descriptor->blocks);
1540                 length = ntohs(descriptor->length);
1541
1542                 if (put_user(blocks, argp))
1543                         return(-EFAULT);
1544                 ++argp;
1545
1546                 if (put_user(length, argp))
1547                         return (-EFAULT);
1548                 ++argp;
1549
1550                 ++u_index;
1551         }
1552
1553         if (put_user(u_index, arg))
1554                 return (-EFAULT);
1555         return (0);
1556 }
1557
1558 /*
1559 ** Send ATAPI_FORMAT_UNIT to the drive.
1560 **
1561 ** Userland gives us the following structure:
1562 **
1563 ** struct idefloppy_format_command {
1564 **        int nblocks;
1565 **        int blocksize;
1566 **        int flags;
1567 **        } ;
1568 **
1569 ** flags is a bitmask, currently, the only defined flag is:
1570 **
1571 **        0x01 - verify media after format.
1572 */
1573
1574 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1575 {
1576         int blocks;
1577         int length;
1578         int flags;
1579         idefloppy_pc_t pc;
1580
1581         if (get_user(blocks, arg) ||
1582             get_user(length, arg+1) ||
1583             get_user(flags, arg+2)) {
1584                 return (-EFAULT);
1585         }
1586
1587         /* Get the SFRP bit */
1588         (void) idefloppy_get_capability_page(drive);
1589         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1590         if (idefloppy_queue_pc_tail(drive, &pc)) {
1591                 return (-EIO);
1592         }
1593
1594         return (0);
1595 }
1596
1597 /*
1598 ** Get ATAPI_FORMAT_UNIT progress indication.
1599 **
1600 ** Userland gives a pointer to an int.  The int is set to a progress
1601 ** indicator 0-65536, with 65536=100%.
1602 **
1603 ** If the drive does not support format progress indication, we just check
1604 ** the dsc bit, and return either 0 or 65536.
1605 */
1606
1607 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1608 {
1609         idefloppy_floppy_t *floppy = drive->driver_data;
1610         idefloppy_pc_t pc;
1611         int progress_indication = 0x10000;
1612
1613         if (floppy->srfp) {
1614                 idefloppy_create_request_sense_cmd(&pc);
1615                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1616                         return (-EIO);
1617                 }
1618
1619                 if (floppy->sense_key == 2 &&
1620                     floppy->asc == 4 &&
1621                     floppy->ascq == 4) {
1622                         progress_indication = floppy->progress_indication;
1623                 }
1624                 /* Else assume format_unit has finished, and we're
1625                 ** at 0x10000 */
1626         } else {
1627                 unsigned long flags;
1628                 u8 stat;
1629
1630                 local_irq_save(flags);
1631                 stat = drive->hwif->INB(IDE_STATUS_REG);
1632                 local_irq_restore(flags);
1633
1634                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1635         }
1636         if (put_user(progress_indication, arg))
1637                 return (-EFAULT);
1638
1639         return (0);
1640 }
1641
1642 /*
1643  *      Return the current floppy capacity.
1644  */
1645 static sector_t idefloppy_capacity (ide_drive_t *drive)
1646 {
1647         idefloppy_floppy_t *floppy = drive->driver_data;
1648         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1649
1650         return capacity;
1651 }
1652
1653 /*
1654  *      idefloppy_identify_device checks if we can support a drive,
1655  *      based on the ATAPI IDENTIFY command results.
1656  */
1657 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1658 {
1659         struct idefloppy_id_gcw gcw;
1660 #if IDEFLOPPY_DEBUG_INFO
1661         u16 mask,i;
1662         char buffer[80];
1663 #endif /* IDEFLOPPY_DEBUG_INFO */
1664
1665         *((u16 *) &gcw) = id->config;
1666
1667 #ifdef CONFIG_PPC
1668         /* kludge for Apple PowerBook internal zip */
1669         if ((gcw.device_type == 5) &&
1670             !strstr(id->model, "CD-ROM") &&
1671             strstr(id->model, "ZIP"))
1672                 gcw.device_type = 0;
1673 #endif
1674
1675 #if IDEFLOPPY_DEBUG_INFO
1676         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1677         switch (gcw.protocol) {
1678                 case 0: case 1: sprintf(buffer, "ATA");break;
1679                 case 2: sprintf(buffer, "ATAPI");break;
1680                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1681         }
1682         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1683         switch (gcw.device_type) {
1684                 case 0: sprintf(buffer, "Direct-access Device");break;
1685                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1686                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1687                 case 5: sprintf(buffer, "CD-ROM Device");break;
1688                 case 6: sprintf(buffer, "Reserved");
1689                 case 7: sprintf(buffer, "Optical memory Device");break;
1690                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1691                 default: sprintf(buffer, "Reserved");
1692         }
1693         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1694         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1695         switch (gcw.drq_type) {
1696                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1697                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1698                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1699                 case 3: sprintf(buffer, "Reserved");break;
1700         }
1701         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1702         switch (gcw.packet_size) {
1703                 case 0: sprintf(buffer, "12 bytes");break;
1704                 case 1: sprintf(buffer, "16 bytes");break;
1705                 default: sprintf(buffer, "Reserved");break;
1706         }
1707         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1708         printk(KERN_INFO "Model: %.40s\n",id->model);
1709         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1710         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1711         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1712         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1713         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1714         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1715         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1716         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1717         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1718         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1719         printk(KERN_INFO "Single Word DMA supported modes:\n");
1720         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1721                 if (id->dma_1word & mask)
1722                         printk(KERN_INFO "   Mode %d%s\n", i,
1723                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1724         }
1725         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1726         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1727                 if (id->dma_mword & mask)
1728                         printk(KERN_INFO "   Mode %d%s\n", i,
1729                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1730         }
1731         if (id->field_valid & 0x0002) {
1732                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1733                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1734                 if (id->eide_dma_min == 0)
1735                         sprintf(buffer, "Not supported");
1736                 else
1737                         sprintf(buffer, "%d ns",id->eide_dma_min);
1738                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1739                 if (id->eide_dma_time == 0)
1740                         sprintf(buffer, "Not supported");
1741                 else
1742                         sprintf(buffer, "%d ns",id->eide_dma_time);
1743                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1744                 if (id->eide_pio == 0)
1745                         sprintf(buffer, "Not supported");
1746                 else
1747                         sprintf(buffer, "%d ns",id->eide_pio);
1748                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1749                         buffer);
1750                 if (id->eide_pio_iordy == 0)
1751                         sprintf(buffer, "Not supported");
1752                 else
1753                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1754                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1755         } else
1756                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1757 #endif /* IDEFLOPPY_DEBUG_INFO */
1758
1759         if (gcw.protocol != 2)
1760                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1761         else if (gcw.device_type != 0)
1762                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1763         else if (!gcw.removable)
1764                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1765         else if (gcw.drq_type == 3) {
1766                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1767         } else if (gcw.packet_size != 0) {
1768                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1769         } else
1770                 return 1;
1771         return 0;
1772 }
1773
1774 #ifdef CONFIG_IDE_PROC_FS
1775 static void idefloppy_add_settings(ide_drive_t *drive)
1776 {
1777         idefloppy_floppy_t *floppy = drive->driver_data;
1778
1779 /*
1780  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1781  */
1782         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1783         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1784         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1785         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1786 }
1787 #else
1788 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1789 #endif
1790
1791 /*
1792  *      Driver initialization.
1793  */
1794 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1795 {
1796         struct idefloppy_id_gcw gcw;
1797
1798         *((u16 *) &gcw) = drive->id->config;
1799         floppy->pc = floppy->pc_stack;
1800         if (gcw.drq_type == 1)
1801                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1802         /*
1803          *      We used to check revisions here. At this point however
1804          *      I'm giving up. Just assume they are all broken, its easier.
1805          *
1806          *      The actual reason for the workarounds was likely
1807          *      a driver bug after all rather than a firmware bug,
1808          *      and the workaround below used to hide it. It should
1809          *      be fixed as of version 1.9, but to be on the safe side
1810          *      we'll leave the limitation below for the 2.2.x tree.
1811          */
1812
1813         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1814                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1815                 /* This value will be visible in the /proc/ide/hdx/settings */
1816                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1817                 blk_queue_max_sectors(drive->queue, 64);
1818         }
1819
1820         /*
1821         *      Guess what?  The IOMEGA Clik! drive also needs the
1822         *      above fix.  It makes nasty clicking noises without
1823         *      it, so please don't remove this.
1824         */
1825         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1826                 blk_queue_max_sectors(drive->queue, 64);
1827                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1828         }
1829
1830
1831         (void) idefloppy_get_capacity(drive);
1832         idefloppy_add_settings(drive);
1833 }
1834
1835 static void ide_floppy_remove(ide_drive_t *drive)
1836 {
1837         idefloppy_floppy_t *floppy = drive->driver_data;
1838         struct gendisk *g = floppy->disk;
1839
1840         ide_proc_unregister_driver(drive, floppy->driver);
1841
1842         del_gendisk(g);
1843
1844         ide_floppy_put(floppy);
1845 }
1846
1847 static void ide_floppy_release(struct kref *kref)
1848 {
1849         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1850         ide_drive_t *drive = floppy->drive;
1851         struct gendisk *g = floppy->disk;
1852
1853         drive->driver_data = NULL;
1854         g->private_data = NULL;
1855         put_disk(g);
1856         kfree(floppy);
1857 }
1858
1859 #ifdef CONFIG_IDE_PROC_FS
1860 static int proc_idefloppy_read_capacity
1861         (char *page, char **start, off_t off, int count, int *eof, void *data)
1862 {
1863         ide_drive_t*drive = (ide_drive_t *)data;
1864         int len;
1865
1866         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1867         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1868 }
1869
1870 static ide_proc_entry_t idefloppy_proc[] = {
1871         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1872         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1873         { NULL, 0, NULL, NULL }
1874 };
1875 #endif  /* CONFIG_IDE_PROC_FS */
1876
1877 static int ide_floppy_probe(ide_drive_t *);
1878
1879 static ide_driver_t idefloppy_driver = {
1880         .gen_driver = {
1881                 .owner          = THIS_MODULE,
1882                 .name           = "ide-floppy",
1883                 .bus            = &ide_bus_type,
1884         },
1885         .probe                  = ide_floppy_probe,
1886         .remove                 = ide_floppy_remove,
1887         .version                = IDEFLOPPY_VERSION,
1888         .media                  = ide_floppy,
1889         .supports_dsc_overlap   = 0,
1890         .do_request             = idefloppy_do_request,
1891         .end_request            = idefloppy_do_end_request,
1892         .error                  = __ide_error,
1893         .abort                  = __ide_abort,
1894 #ifdef CONFIG_IDE_PROC_FS
1895         .proc                   = idefloppy_proc,
1896 #endif
1897 };
1898
1899 static int idefloppy_open(struct inode *inode, struct file *filp)
1900 {
1901         struct gendisk *disk = inode->i_bdev->bd_disk;
1902         struct ide_floppy_obj *floppy;
1903         ide_drive_t *drive;
1904         idefloppy_pc_t pc;
1905         int ret = 0;
1906
1907         debug_log(KERN_INFO "Reached idefloppy_open\n");
1908
1909         if (!(floppy = ide_floppy_get(disk)))
1910                 return -ENXIO;
1911
1912         drive = floppy->drive;
1913
1914         floppy->openers++;
1915
1916         if (floppy->openers == 1) {
1917                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1918                 /* Just in case */
1919
1920                 idefloppy_create_test_unit_ready_cmd(&pc);
1921                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1922                         idefloppy_create_start_stop_cmd(&pc, 1);
1923                         (void) idefloppy_queue_pc_tail(drive, &pc);
1924                 }
1925
1926                 if (idefloppy_get_capacity (drive)
1927                    && (filp->f_flags & O_NDELAY) == 0
1928                     /*
1929                     ** Allow O_NDELAY to open a drive without a disk, or with
1930                     ** an unreadable disk, so that we can get the format
1931                     ** capacity of the drive or begin the format - Sam
1932                     */
1933                     ) {
1934                         ret = -EIO;
1935                         goto out_put_floppy;
1936                 }
1937
1938                 if (floppy->wp && (filp->f_mode & 2)) {
1939                         ret = -EROFS;
1940                         goto out_put_floppy;
1941                 }
1942                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1943                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1944                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1945                         idefloppy_create_prevent_cmd(&pc, 1);
1946                         (void) idefloppy_queue_pc_tail(drive, &pc);
1947                 }
1948                 check_disk_change(inode->i_bdev);
1949         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1950                 ret = -EBUSY;
1951                 goto out_put_floppy;
1952         }
1953         return 0;
1954
1955 out_put_floppy:
1956         floppy->openers--;
1957         ide_floppy_put(floppy);
1958         return ret;
1959 }
1960
1961 static int idefloppy_release(struct inode *inode, struct file *filp)
1962 {
1963         struct gendisk *disk = inode->i_bdev->bd_disk;
1964         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1965         ide_drive_t *drive = floppy->drive;
1966         idefloppy_pc_t pc;
1967
1968         debug_log(KERN_INFO "Reached idefloppy_release\n");
1969
1970         if (floppy->openers == 1) {
1971                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1972                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1973                         idefloppy_create_prevent_cmd(&pc, 0);
1974                         (void) idefloppy_queue_pc_tail(drive, &pc);
1975                 }
1976
1977                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1978         }
1979
1980         floppy->openers--;
1981
1982         ide_floppy_put(floppy);
1983
1984         return 0;
1985 }
1986
1987 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1988 {
1989         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1990         ide_drive_t *drive = floppy->drive;
1991
1992         geo->heads = drive->bios_head;
1993         geo->sectors = drive->bios_sect;
1994         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1995         return 0;
1996 }
1997
1998 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1999                         unsigned int cmd, unsigned long arg)
2000 {
2001         struct block_device *bdev = inode->i_bdev;
2002         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2003         ide_drive_t *drive = floppy->drive;
2004         void __user *argp = (void __user *)arg;
2005         int err;
2006         int prevent = (arg) ? 1 : 0;
2007         idefloppy_pc_t pc;
2008
2009         switch (cmd) {
2010         case CDROMEJECT:
2011                 prevent = 0;
2012                 /* fall through */
2013         case CDROM_LOCKDOOR:
2014                 if (floppy->openers > 1)
2015                         return -EBUSY;
2016
2017                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2018                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2019                         idefloppy_create_prevent_cmd(&pc, prevent);
2020                         (void) idefloppy_queue_pc_tail(drive, &pc);
2021                 }
2022                 if (cmd == CDROMEJECT) {
2023                         idefloppy_create_start_stop_cmd(&pc, 2);
2024                         (void) idefloppy_queue_pc_tail(drive, &pc);
2025                 }
2026                 return 0;
2027         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2028                 return 0;
2029         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2030                 return idefloppy_get_format_capacities(drive, argp);
2031         case IDEFLOPPY_IOCTL_FORMAT_START:
2032
2033                 if (!(file->f_mode & 2))
2034                         return -EPERM;
2035
2036                 if (floppy->openers > 1) {
2037                         /* Don't format if someone is using the disk */
2038
2039                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2040                                   &floppy->flags);
2041                         return -EBUSY;
2042                 }
2043
2044                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2045
2046                 err = idefloppy_begin_format(drive, argp);
2047                 if (err)
2048                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2049                 return err;
2050                 /*
2051                 ** Note, the bit will be cleared when the device is
2052                 ** closed.  This is the cleanest way to handle the
2053                 ** situation where the drive does not support
2054                 ** format progress reporting.
2055                 */
2056         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2057                 return idefloppy_get_format_progress(drive, argp);
2058         }
2059
2060         /*
2061          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2062          * and CDROM_SEND_PACKET (legacy) ioctls
2063          */
2064         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2065                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2066                                         bdev->bd_disk, cmd, argp);
2067         else
2068                 err = -ENOTTY;
2069
2070         if (err == -ENOTTY)
2071                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2072
2073         return err;
2074 }
2075
2076 static int idefloppy_media_changed(struct gendisk *disk)
2077 {
2078         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2079         ide_drive_t *drive = floppy->drive;
2080
2081         /* do not scan partitions twice if this is a removable device */
2082         if (drive->attach) {
2083                 drive->attach = 0;
2084                 return 0;
2085         }
2086         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2087 }
2088
2089 static int idefloppy_revalidate_disk(struct gendisk *disk)
2090 {
2091         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2092         set_capacity(disk, idefloppy_capacity(floppy->drive));
2093         return 0;
2094 }
2095
2096 static struct block_device_operations idefloppy_ops = {
2097         .owner          = THIS_MODULE,
2098         .open           = idefloppy_open,
2099         .release        = idefloppy_release,
2100         .ioctl          = idefloppy_ioctl,
2101         .getgeo         = idefloppy_getgeo,
2102         .media_changed  = idefloppy_media_changed,
2103         .revalidate_disk= idefloppy_revalidate_disk
2104 };
2105
2106 static int ide_floppy_probe(ide_drive_t *drive)
2107 {
2108         idefloppy_floppy_t *floppy;
2109         struct gendisk *g;
2110
2111         if (!strstr("ide-floppy", drive->driver_req))
2112                 goto failed;
2113         if (!drive->present)
2114                 goto failed;
2115         if (drive->media != ide_floppy)
2116                 goto failed;
2117         if (!idefloppy_identify_device (drive, drive->id)) {
2118                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2119                 goto failed;
2120         }
2121         if (drive->scsi) {
2122                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2123                 goto failed;
2124         }
2125         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2126                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2127                 goto failed;
2128         }
2129
2130         g = alloc_disk(1 << PARTN_BITS);
2131         if (!g)
2132                 goto out_free_floppy;
2133
2134         ide_init_disk(g, drive);
2135
2136         ide_proc_register_driver(drive, &idefloppy_driver);
2137
2138         kref_init(&floppy->kref);
2139
2140         floppy->drive = drive;
2141         floppy->driver = &idefloppy_driver;
2142         floppy->disk = g;
2143
2144         g->private_data = &floppy->driver;
2145
2146         drive->driver_data = floppy;
2147
2148         idefloppy_setup (drive, floppy);
2149
2150         g->minors = 1 << PARTN_BITS;
2151         g->driverfs_dev = &drive->gendev;
2152         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2153         g->fops = &idefloppy_ops;
2154         drive->attach = 1;
2155         add_disk(g);
2156         return 0;
2157
2158 out_free_floppy:
2159         kfree(floppy);
2160 failed:
2161         return -ENODEV;
2162 }
2163
2164 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2165
2166 static void __exit idefloppy_exit (void)
2167 {
2168         driver_unregister(&idefloppy_driver.gen_driver);
2169 }
2170
2171 static int __init idefloppy_init(void)
2172 {
2173         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2174         return driver_register(&idefloppy_driver.gen_driver);
2175 }
2176
2177 MODULE_ALIAS("ide:*m-floppy*");
2178 module_init(idefloppy_init);
2179 module_exit(idefloppy_exit);
2180 MODULE_LICENSE("GPL");