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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 <asm/byteorder.h>
 103 #include <asm/irq.h>
 104 #include <asm/uaccess.h>
 105 #include <asm/io.h>
 106 #include <asm/unaligned.h>
 107
 108 /*
 109  *      The following are used to debug the driver.
 110  */
 111 #define IDEFLOPPY_DEBUG_LOG             0
 112 #define IDEFLOPPY_DEBUG_INFO            0
 113 #define IDEFLOPPY_DEBUG_BUGS            1
 114
 115 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
 116 #define IDEFLOPPY_DEBUG( fmt, args... )
 117
 118 #if IDEFLOPPY_DEBUG_LOG
 119 #define debug_log printk
 120 #else
 121 #define debug_log(fmt, args... ) do {} while(0)
 122 #endif
 123
 124
 125 /*
 126  *      Some drives require a longer irq timeout.
 127  */
 128 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
 129
 130 /*
 131  *      After each failed packet command we issue a request sense command
 132  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
 133  */
 134 #define IDEFLOPPY_MAX_PC_RETRIES        3
 135
 136 /*
 137  *      With each packet command, we allocate a buffer of
 138  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
 139  */
 140 #define IDEFLOPPY_PC_BUFFER_SIZE        256
 141
 142 /*
 143  *      In various places in the driver, we need to allocate storage
 144  *      for packet commands and requests, which will remain valid while
 145  *      we leave the driver to wait for an interrupt or a timeout event.
 146  */
 147 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
 148
 149 /*
 150  *      Our view of a packet command.
 151  */
 152 typedef struct idefloppy_packet_command_s {
 153         u8 c[12];                               /* Actual packet bytes */
 154         int retries;                            /* On each retry, we increment retries */
 155         int error;                              /* Error code */
 156         int request_transfer;                   /* Bytes to transfer */
 157         int actually_transferred;               /* Bytes actually transferred */
 158         int buffer_size;                        /* Size of our data buffer */
 159         int b_count;                            /* Missing/Available data on the current buffer */
 160         struct request *rq;                     /* The corresponding request */
 161         u8 *buffer;                             /* Data buffer */
 162         u8 *current_position;                   /* Pointer into the above buffer */
 163         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 164         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 165         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 166 } idefloppy_pc_t;
 167
 168 /*
 169  *      Packet command flag bits.
 170  */
 171 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 172 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 173 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 174 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 175 #define PC_WRITING                      5       /* Data direction */
 176
 177 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 178
 179 /*
 180  *      Removable Block Access Capabilities Page
 181  */
 182 typedef struct {
 183 #if defined(__LITTLE_ENDIAN_BITFIELD)
 184         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 185         unsigned        reserved1_6     :1;     /* Reserved */
 186         unsigned        ps              :1;     /* Should be 0 */
 187 #elif defined(__BIG_ENDIAN_BITFIELD)
 188         unsigned        ps              :1;     /* Should be 0 */
 189         unsigned        reserved1_6     :1;     /* Reserved */
 190         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 191 #else
 192 #error "Bitfield endianness not defined! Check your byteorder.h"
 193 #endif
 194         u8              page_length;            /* Page Length - Should be 0xa */
 195 #if defined(__LITTLE_ENDIAN_BITFIELD)
 196         unsigned        reserved2       :6;
 197         unsigned        srfp            :1;     /* Supports reporting progress of format */
 198         unsigned        sflp            :1;     /* System floppy type device */
 199         unsigned        tlun            :3;     /* Total logical units supported by the device */
 200         unsigned        reserved3       :3;
 201         unsigned        sml             :1;     /* Single / Multiple lun supported */
 202         unsigned        ncd             :1;     /* Non cd optical device */
 203 #elif defined(__BIG_ENDIAN_BITFIELD)
 204         unsigned        sflp            :1;     /* System floppy type device */
 205         unsigned        srfp            :1;     /* Supports reporting progress of format */
 206         unsigned        reserved2       :6;
 207         unsigned        ncd             :1;     /* Non cd optical device */
 208         unsigned        sml             :1;     /* Single / Multiple lun supported */
 209         unsigned        reserved3       :3;
 210         unsigned        tlun            :3;     /* Total logical units supported by the device */
 211 #else
 212 #error "Bitfield endianness not defined! Check your byteorder.h"
 213 #endif
 214         u8              reserved[8];
 215 } idefloppy_capabilities_page_t;
 216
 217 /*
 218  *      Flexible disk page.
 219  */
 220 typedef struct {
 221 #if defined(__LITTLE_ENDIAN_BITFIELD)
 222         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 223         unsigned        reserved1_6     :1;     /* Reserved */
 224         unsigned        ps              :1;     /* The device is capable of saving the page */
 225 #elif defined(__BIG_ENDIAN_BITFIELD)
 226         unsigned        ps              :1;     /* The device is capable of saving the page */
 227         unsigned        reserved1_6     :1;     /* Reserved */
 228         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 229 #else
 230 #error "Bitfield endianness not defined! Check your byteorder.h"
 231 #endif
 232         u8              page_length;            /* Page Length - Should be 0x1e */
 233         u16             transfer_rate;          /* In kilobits per second */
 234         u8              heads, sectors;         /* Number of heads, Number of sectors per track */
 235         u16             sector_size;            /* Byes per sector */
 236         u16             cyls;                   /* Number of cylinders */
 237         u8              reserved10[10];
 238         u8              motor_delay;            /* Motor off delay */
 239         u8              reserved21[7];
 240         u16             rpm;                    /* Rotations per minute */
 241         u8              reserved30[2];
 242 } idefloppy_flexible_disk_page_t;
 243
 244 /*
 245  *      Format capacity
 246  */
 247 typedef struct {
 248         u8              reserved[3];
 249         u8              length;                 /* Length of the following descriptors in bytes */
 250 } idefloppy_capacity_header_t;
 251
 252 typedef struct {
 253         u32             blocks;                 /* Number of blocks */
 254 #if defined(__LITTLE_ENDIAN_BITFIELD)
 255         unsigned        dc              :2;     /* Descriptor Code */
 256         unsigned        reserved        :6;
 257 #elif defined(__BIG_ENDIAN_BITFIELD)
 258         unsigned        reserved        :6;
 259         unsigned        dc              :2;     /* Descriptor Code */
 260 #else
 261 #error "Bitfield endianness not defined! Check your byteorder.h"
 262 #endif
 263         u8              length_msb;             /* Block Length (MSB)*/
 264         u16             length;                 /* Block Length */
 265 } idefloppy_capacity_descriptor_t;
 266
 267 #define CAPACITY_INVALID        0x00
 268 #define CAPACITY_UNFORMATTED    0x01
 269 #define CAPACITY_CURRENT        0x02
 270 #define CAPACITY_NO_CARTRIDGE   0x03
 271
 272 /*
 273  *      Most of our global data which we need to save even as we leave the
 274  *      driver due to an interrupt or a timer event is stored in a variable
 275  *      of type idefloppy_floppy_t, defined below.
 276  */
 277 typedef struct ide_floppy_obj {
 278         ide_drive_t     *drive;
 279         ide_driver_t    *driver;
 280         struct gendisk  *disk;
 281         struct kref     kref;
 282         unsigned int    openers;        /* protected by BKL for now */
 283
 284         /* Current packet command */
 285         idefloppy_pc_t *pc;
 286         /* Last failed packet command */
 287         idefloppy_pc_t *failed_pc;
 288         /* Packet command stack */
 289         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 290         /* Next free packet command storage space */
 291         int pc_stack_index;
 292         struct request rq_stack[IDEFLOPPY_PC_STACK];
 293         /* We implement a circular array */
 294         int rq_stack_index;
 295
 296         /*
 297          *      Last error information
 298          */
 299         u8 sense_key, asc, ascq;
 300         /* delay this long before sending packet command */
 301         u8 ticks;
 302         int progress_indication;
 303
 304         /*
 305          *      Device information
 306          */
 307         /* Current format */
 308         int blocks, block_size, bs_factor;
 309         /* Last format capacity */
 310         idefloppy_capacity_descriptor_t capacity;
 311         /* Copy of the flexible disk page */
 312         idefloppy_flexible_disk_page_t flexible_disk_page;
 313         /* Write protect */
 314         int wp;
 315         /* Supports format progress report */
 316         int srfp;
 317         /* Status/Action flags */
 318         unsigned long flags;
 319 } idefloppy_floppy_t;
 320
 321 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 322
 323 /*
 324  *      Floppy flag bits values.
 325  */
 326 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 327 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 328 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 329 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 330 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 331 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 332
 333 /*
 334  *      ATAPI floppy drive packet commands
 335  */
 336 #define IDEFLOPPY_FORMAT_UNIT_CMD       0x04
 337 #define IDEFLOPPY_INQUIRY_CMD           0x12
 338 #define IDEFLOPPY_MODE_SELECT_CMD       0x55
 339 #define IDEFLOPPY_MODE_SENSE_CMD        0x5a
 340 #define IDEFLOPPY_READ10_CMD            0x28
 341 #define IDEFLOPPY_READ12_CMD            0xa8
 342 #define IDEFLOPPY_READ_CAPACITY_CMD     0x23
 343 #define IDEFLOPPY_REQUEST_SENSE_CMD     0x03
 344 #define IDEFLOPPY_PREVENT_REMOVAL_CMD   0x1e
 345 #define IDEFLOPPY_SEEK_CMD              0x2b
 346 #define IDEFLOPPY_START_STOP_CMD        0x1b
 347 #define IDEFLOPPY_TEST_UNIT_READY_CMD   0x00
 348 #define IDEFLOPPY_VERIFY_CMD            0x2f
 349 #define IDEFLOPPY_WRITE10_CMD           0x2a
 350 #define IDEFLOPPY_WRITE12_CMD           0xaa
 351 #define IDEFLOPPY_WRITE_VERIFY_CMD      0x2e
 352
 353 /*
 354  *      Defines for the mode sense command
 355  */
 356 #define MODE_SENSE_CURRENT              0x00
 357 #define MODE_SENSE_CHANGEABLE           0x01
 358 #define MODE_SENSE_DEFAULT              0x02
 359 #define MODE_SENSE_SAVED                0x03
 360
 361 /*
 362  *      IOCTLs used in low-level formatting.
 363  */
 364
 365 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 366 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 367 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 368 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 369
 370 #if 0
 371 /*
 372  *      Special requests for our block device strategy routine.
 373  */
 374 #define IDEFLOPPY_FIRST_RQ      90
 375
 376 /*
 377  *      IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
 378  */
 379 #define IDEFLOPPY_PC_RQ         90
 380
 381 #define IDEFLOPPY_LAST_RQ       90
 382
 383 /*
 384  *      A macro which can be used to check if a given request command
 385  *      originated in the driver or in the buffer cache layer.
 386  */
 387 #define IDEFLOPPY_RQ_CMD(cmd)   ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
 388
 389 #endif
 390
 391 /*
 392  *      Error codes which are returned in rq->errors to the higher part
 393  *      of the driver.
 394  */
 395 #define IDEFLOPPY_ERROR_GENERAL         101
 396
 397 /*
 398  *      The following is used to format the general configuration word of
 399  *      the ATAPI IDENTIFY DEVICE command.
 400  */
 401 struct idefloppy_id_gcw {
 402 #if defined(__LITTLE_ENDIAN_BITFIELD)
 403         unsigned packet_size            :2;     /* Packet Size */
 404         unsigned reserved234            :3;     /* Reserved */
 405         unsigned drq_type               :2;     /* Command packet DRQ type */
 406         unsigned removable              :1;     /* Removable media */
 407         unsigned device_type            :5;     /* Device type */
 408         unsigned reserved13             :1;     /* Reserved */
 409         unsigned protocol               :2;     /* Protocol type */
 410 #elif defined(__BIG_ENDIAN_BITFIELD)
 411         unsigned protocol               :2;     /* Protocol type */
 412         unsigned reserved13             :1;     /* Reserved */
 413         unsigned device_type            :5;     /* Device type */
 414         unsigned removable              :1;     /* Removable media */
 415         unsigned drq_type               :2;     /* Command packet DRQ type */
 416         unsigned reserved234            :3;     /* Reserved */
 417         unsigned packet_size            :2;     /* Packet Size */
 418 #else
 419 #error "Bitfield endianness not defined! Check your byteorder.h"
 420 #endif
 421 };
 422
 423 /*
 424  *      INQUIRY packet command - Data Format
 425  */
 426 typedef struct {
 427 #if defined(__LITTLE_ENDIAN_BITFIELD)
 428         unsigned        device_type     :5;     /* Peripheral Device Type */
 429         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 430         unsigned        reserved1_6t0   :7;     /* Reserved */
 431         unsigned        rmb             :1;     /* Removable Medium Bit */
 432         unsigned        ansi_version    :3;     /* ANSI Version */
 433         unsigned        ecma_version    :3;     /* ECMA Version */
 434         unsigned        iso_version     :2;     /* ISO Version */
 435         unsigned        response_format :4;     /* Response Data Format */
 436         unsigned        reserved3_45    :2;     /* Reserved */
 437         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 438         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 439 #elif defined(__BIG_ENDIAN_BITFIELD)
 440         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 441         unsigned        device_type     :5;     /* Peripheral Device Type */
 442         unsigned        rmb             :1;     /* Removable Medium Bit */
 443         unsigned        reserved1_6t0   :7;     /* Reserved */
 444         unsigned        iso_version     :2;     /* ISO Version */
 445         unsigned        ecma_version    :3;     /* ECMA Version */
 446         unsigned        ansi_version    :3;     /* ANSI Version */
 447         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 448         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 449         unsigned        reserved3_45    :2;     /* Reserved */
 450         unsigned        response_format :4;     /* Response Data Format */
 451 #else
 452 #error "Bitfield endianness not defined! Check your byteorder.h"
 453 #endif
 454         u8              additional_length;      /* Additional Length (total_length-4) */
 455         u8              rsv5, rsv6, rsv7;       /* Reserved */
 456         u8              vendor_id[8];           /* Vendor Identification */
 457         u8              product_id[16];         /* Product Identification */
 458         u8              revision_level[4];      /* Revision Level */
 459         u8              vendor_specific[20];    /* Vendor Specific - Optional */
 460         u8              reserved56t95[40];      /* Reserved - Optional */
 461                                                 /* Additional information may be returned */
 462 } idefloppy_inquiry_result_t;
 463
 464 /*
 465  *      REQUEST SENSE packet command result - Data Format.
 466  */
 467 typedef struct {
 468 #if defined(__LITTLE_ENDIAN_BITFIELD)
 469         unsigned        error_code      :7;     /* Current error (0x70) */
 470         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 471         u8              reserved1       :8;     /* Reserved */
 472         unsigned        sense_key       :4;     /* Sense Key */
 473         unsigned        reserved2_4     :1;     /* Reserved */
 474         unsigned        ili             :1;     /* Incorrect Length Indicator */
 475         unsigned        reserved2_67    :2;
 476 #elif defined(__BIG_ENDIAN_BITFIELD)
 477         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 478         unsigned        error_code      :7;     /* Current error (0x70) */
 479         u8              reserved1       :8;     /* Reserved */
 480         unsigned        reserved2_67    :2;
 481         unsigned        ili             :1;     /* Incorrect Length Indicator */
 482         unsigned        reserved2_4     :1;     /* Reserved */
 483         unsigned        sense_key       :4;     /* Sense Key */
 484 #else
 485 #error "Bitfield endianness not defined! Check your byteorder.h"
 486 #endif
 487         u32             information __attribute__ ((packed));
 488         u8              asl;                    /* Additional sense length (n-7) */
 489         u32             command_specific;       /* Additional command specific information */
 490         u8              asc;                    /* Additional Sense Code */
 491         u8              ascq;                   /* Additional Sense Code Qualifier */
 492         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
 493         u8              sksv[3];
 494         u8              pad[2];                 /* Padding to 20 bytes */
 495 } idefloppy_request_sense_result_t;
 496
 497 /*
 498  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
 499  */
 500 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 501 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 502
 503 /*
 504  *      Mode Parameter Header for the MODE SENSE packet command
 505  */
 506 typedef struct {
 507         u16             mode_data_length;       /* Length of the following data transfer */
 508         u8              medium_type;            /* Medium Type */
 509 #if defined(__LITTLE_ENDIAN_BITFIELD)
 510         unsigned        reserved3       :7;
 511         unsigned        wp              :1;     /* Write protect */
 512 #elif defined(__BIG_ENDIAN_BITFIELD)
 513         unsigned        wp              :1;     /* Write protect */
 514         unsigned        reserved3       :7;
 515 #else
 516 #error "Bitfield endianness not defined! Check your byteorder.h"
 517 #endif
 518         u8              reserved[4];
 519 } idefloppy_mode_parameter_header_t;
 520
 521 static DEFINE_MUTEX(idefloppy_ref_mutex);
 522
 523 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 524
 525 #define ide_floppy_g(disk) \
 526         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 527
 528 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 529 {
 530         struct ide_floppy_obj *floppy = NULL;
 531
 532         mutex_lock(&idefloppy_ref_mutex);
 533         floppy = ide_floppy_g(disk);
 534         if (floppy)
 535                 kref_get(&floppy->kref);
 536         mutex_unlock(&idefloppy_ref_mutex);
 537         return floppy;
 538 }
 539
 540 static void ide_floppy_release(struct kref *);
 541
 542 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 543 {
 544         mutex_lock(&idefloppy_ref_mutex);
 545         kref_put(&floppy->kref, ide_floppy_release);
 546         mutex_unlock(&idefloppy_ref_mutex);
 547 }
 548
 549 /*
 550  *      Too bad. The drive wants to send us data which we are not ready to accept.
 551  *      Just throw it away.
 552  */
 553 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 554 {
 555         while (bcount--)
 556                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 557 }
 558
 559 #if IDEFLOPPY_DEBUG_BUGS
 560 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 561 {
 562         while (bcount--)
 563                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 564 }
 565 #endif /* IDEFLOPPY_DEBUG_BUGS */
 566
 567
 568 /*
 569  *      idefloppy_do_end_request is used to finish servicing a request.
 570  *
 571  *      For read/write requests, we will call ide_end_request to pass to the
 572  *      next buffer.
 573  */
 574 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 575 {
 576         idefloppy_floppy_t *floppy = drive->driver_data;
 577         struct request *rq = HWGROUP(drive)->rq;
 578         int error;
 579
 580         debug_log(KERN_INFO "Reached idefloppy_end_request\n");
 581
 582         switch (uptodate) {
 583                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 584                 case 1: error = 0; break;
 585                 default: error = uptodate;
 586         }
 587         if (error)
 588                 floppy->failed_pc = NULL;
 589         /* Why does this happen? */
 590         if (!rq)
 591                 return 0;
 592         if (!blk_special_request(rq)) {
 593                 /* our real local end request function */
 594                 ide_end_request(drive, uptodate, nsecs);
 595                 return 0;
 596         }
 597         rq->errors = error;
 598         /* fixme: need to move this local also */
 599         ide_end_drive_cmd(drive, 0, 0);
 600         return 0;
 601 }
 602
 603 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 604 {
 605         struct request *rq = pc->rq;
 606         struct bio_vec *bvec;
 607         struct bio *bio;
 608         unsigned long flags;
 609         char *data;
 610         int count, i, done = 0;
 611
 612         rq_for_each_bio(bio, rq) {
 613                 bio_for_each_segment(bvec, bio, i) {
 614                         if (!bcount)
 615                                 break;
 616
 617                         count = min(bvec->bv_len, bcount);
 618
 619                         data = bvec_kmap_irq(bvec, &flags);
 620                         drive->hwif->atapi_input_bytes(drive, data, count);
 621                         bvec_kunmap_irq(data, &flags);
 622
 623                         bcount -= count;
 624                         pc->b_count += count;
 625                         done += count;
 626                 }
 627         }
 628
 629         idefloppy_do_end_request(drive, 1, done >> 9);
 630
 631         if (bcount) {
 632                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 633                 idefloppy_discard_data(drive, bcount);
 634         }
 635 }
 636
 637 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 638 {
 639         struct request *rq = pc->rq;
 640         struct bio *bio;
 641         struct bio_vec *bvec;
 642         unsigned long flags;
 643         int count, i, done = 0;
 644         char *data;
 645
 646         rq_for_each_bio(bio, rq) {
 647                 bio_for_each_segment(bvec, bio, i) {
 648                         if (!bcount)
 649                                 break;
 650
 651                         count = min(bvec->bv_len, bcount);
 652
 653                         data = bvec_kmap_irq(bvec, &flags);
 654                         drive->hwif->atapi_output_bytes(drive, data, count);
 655                         bvec_kunmap_irq(data, &flags);
 656
 657                         bcount -= count;
 658                         pc->b_count += count;
 659                         done += count;
 660                 }
 661         }
 662
 663         idefloppy_do_end_request(drive, 1, done >> 9);
 664
 665 #if IDEFLOPPY_DEBUG_BUGS
 666         if (bcount) {
 667                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 668                 idefloppy_write_zeros(drive, bcount);
 669         }
 670 #endif
 671 }
 672
 673 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 674 {
 675         struct request *rq = pc->rq;
 676         struct bio *bio = rq->bio;
 677
 678         while ((bio = rq->bio) != NULL)
 679                 idefloppy_do_end_request(drive, 1, 0);
 680 }
 681
 682 /*
 683  *      idefloppy_queue_pc_head generates a new packet command request in front
 684  *      of the request queue, before the current request, so that it will be
 685  *      processed immediately, on the next pass through the driver.
 686  */
 687 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 688 {
 689         struct ide_floppy_obj *floppy = drive->driver_data;
 690
 691         ide_init_drive_cmd(rq);
 692         rq->buffer = (char *) pc;
 693         rq->cmd_type = REQ_TYPE_SPECIAL;
 694         rq->rq_disk = floppy->disk;
 695         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 696 }
 697
 698 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 699 {
 700         idefloppy_floppy_t *floppy = drive->driver_data;
 701
 702         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 703                 floppy->pc_stack_index=0;
 704         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 705 }
 706
 707 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 708 {
 709         idefloppy_floppy_t *floppy = drive->driver_data;
 710
 711         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 712                 floppy->rq_stack_index = 0;
 713         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 714 }
 715
 716 /*
 717  *      idefloppy_analyze_error is called on each failed packet command retry
 718  *      to analyze the request sense.
 719  */
 720 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
 721 {
 722         idefloppy_floppy_t *floppy = drive->driver_data;
 723
 724         floppy->sense_key = result->sense_key;
 725         floppy->asc = result->asc;
 726         floppy->ascq = result->ascq;
 727         floppy->progress_indication = result->sksv[0] & 0x80 ?
 728                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
 729         if (floppy->failed_pc)
 730                 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
 731                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
 732                         result->sense_key, result->asc, result->ascq);
 733         else
 734                 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
 735                         "ascq = %x\n", result->sense_key,
 736                         result->asc, result->ascq);
 737 }
 738
 739 static void idefloppy_request_sense_callback (ide_drive_t *drive)
 740 {
 741         idefloppy_floppy_t *floppy = drive->driver_data;
 742
 743         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 744
 745         if (!floppy->pc->error) {
 746                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
 747                 idefloppy_do_end_request(drive, 1, 0);
 748         } else {
 749                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
 750                 idefloppy_do_end_request(drive, 0, 0);
 751         }
 752 }
 753
 754 /*
 755  *      General packet command callback function.
 756  */
 757 static void idefloppy_pc_callback (ide_drive_t *drive)
 758 {
 759         idefloppy_floppy_t *floppy = drive->driver_data;
 760
 761         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 762
 763         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 764 }
 765
 766 /*
 767  *      idefloppy_init_pc initializes a packet command.
 768  */
 769 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 770 {
 771         memset(pc->c, 0, 12);
 772         pc->retries = 0;
 773         pc->flags = 0;
 774         pc->request_transfer = 0;
 775         pc->buffer = pc->pc_buffer;
 776         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 777         pc->callback = &idefloppy_pc_callback;
 778 }
 779
 780 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 781 {
 782         idefloppy_init_pc(pc);
 783         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
 784         pc->c[4] = 255;
 785         pc->request_transfer = 18;
 786         pc->callback = &idefloppy_request_sense_callback;
 787 }
 788
 789 /*
 790  *      idefloppy_retry_pc is called when an error was detected during the
 791  *      last packet command. We queue a request sense packet command in
 792  *      the head of the request list.
 793  */
 794 static void idefloppy_retry_pc (ide_drive_t *drive)
 795 {
 796         idefloppy_pc_t *pc;
 797         struct request *rq;
 798         atapi_error_t error;
 799
 800         error.all = HWIF(drive)->INB(IDE_ERROR_REG);
 801         pc = idefloppy_next_pc_storage(drive);
 802         rq = idefloppy_next_rq_storage(drive);
 803         idefloppy_create_request_sense_cmd(pc);
 804         idefloppy_queue_pc_head(drive, pc, rq);
 805 }
 806
 807 /*
 808  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 809  *      during a packet command.
 810  */
 811 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 812 {
 813         idefloppy_floppy_t *floppy = drive->driver_data;
 814         atapi_status_t status;
 815         atapi_bcount_t bcount;
 816         atapi_ireason_t ireason;
 817         idefloppy_pc_t *pc = floppy->pc;
 818         struct request *rq = pc->rq;
 819         unsigned int temp;
 820
 821         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
 822                 __FUNCTION__);
 823
 824         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 825                 if (HWIF(drive)->ide_dma_end(drive)) {
 826                         set_bit(PC_DMA_ERROR, &pc->flags);
 827                 } else {
 828                         pc->actually_transferred = pc->request_transfer;
 829                         idefloppy_update_buffers(drive, pc);
 830                 }
 831                 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
 832         }
 833
 834         /* Clear the interrupt */
 835         status.all = HWIF(drive)->INB(IDE_STATUS_REG);
 836
 837         if (!status.b.drq) {                    /* No more interrupts */
 838                 debug_log(KERN_INFO "Packet command completed, %d bytes "
 839                         "transferred\n", pc->actually_transferred);
 840                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 841
 842                 local_irq_enable_in_hardirq();
 843
 844                 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
 845                         /* Error detected */
 846                         debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
 847                                 drive->name);
 848                         rq->errors++;
 849                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
 850                                 printk(KERN_ERR "ide-floppy: I/O error in "
 851                                         "request sense command\n");
 852                                 return ide_do_reset(drive);
 853                         }
 854                         /* Retry operation */
 855                         idefloppy_retry_pc(drive);
 856                         /* queued, but not started */
 857                         return ide_stopped;
 858                 }
 859                 pc->error = 0;
 860                 if (floppy->failed_pc == pc)
 861                         floppy->failed_pc = NULL;
 862                 /* Command finished - Call the callback function */
 863                 pc->callback(drive);
 864                 return ide_stopped;
 865         }
 866
 867         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 868                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 869                         "more interrupts in DMA mode\n");
 870                 ide_dma_off(drive);
 871                 return ide_do_reset(drive);
 872         }
 873
 874         /* Get the number of bytes to transfer */
 875         bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
 876         bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
 877         /* on this interrupt */
 878         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 879
 880         if (ireason.b.cod) {
 881                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 882                 return ide_do_reset(drive);
 883         }
 884         if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
 885                 /* Hopefully, we will never get here */
 886                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 887                         ireason.b.io ? "Write":"Read");
 888                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 889                         ireason.b.io ? "Read":"Write");
 890                 return ide_do_reset(drive);
 891         }
 892         if (!test_bit(PC_WRITING, &pc->flags)) {
 893                 /* Reading - Check that we have enough space */
 894                 temp = pc->actually_transferred + bcount.all;
 895                 if (temp > pc->request_transfer) {
 896                         if (temp > pc->buffer_size) {
 897                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 898                                         "to send us more data than expected "
 899                                         "- discarding data\n");
 900                                 idefloppy_discard_data(drive,bcount.all);
 901                                 BUG_ON(HWGROUP(drive)->handler != NULL);
 902                                 ide_set_handler(drive,
 903                                                 &idefloppy_pc_intr,
 904                                                 IDEFLOPPY_WAIT_CMD,
 905                                                 NULL);
 906                                 return ide_started;
 907                         }
 908                         debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
 909                                 "send us more data than expected - "
 910                                 "allowing transfer\n");
 911                 }
 912         }
 913         if (test_bit(PC_WRITING, &pc->flags)) {
 914                 if (pc->buffer != NULL)
 915                         /* Write the current buffer */
 916                         HWIF(drive)->atapi_output_bytes(drive,
 917                                                 pc->current_position,
 918                                                 bcount.all);
 919                 else
 920                         idefloppy_output_buffers(drive, pc, bcount.all);
 921         } else {
 922                 if (pc->buffer != NULL)
 923                         /* Read the current buffer */
 924                         HWIF(drive)->atapi_input_bytes(drive,
 925                                                 pc->current_position,
 926                                                 bcount.all);
 927                 else
 928                         idefloppy_input_buffers(drive, pc, bcount.all);
 929         }
 930         /* Update the current position */
 931         pc->actually_transferred += bcount.all;
 932         pc->current_position += bcount.all;
 933
 934         BUG_ON(HWGROUP(drive)->handler != NULL);
 935         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 936         return ide_started;
 937 }
 938
 939 /*
 940  * This is the original routine that did the packet transfer.
 941  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 942  * for that drive below. The algorithm is chosen based on drive type
 943  */
 944 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 945 {
 946         ide_startstop_t startstop;
 947         idefloppy_floppy_t *floppy = drive->driver_data;
 948         atapi_ireason_t ireason;
 949
 950         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 951                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 952                                 "initiated yet DRQ isn't asserted\n");
 953                 return startstop;
 954         }
 955         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 956         if (!ireason.b.cod || ireason.b.io) {
 957                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 958                                 "issuing a packet command\n");
 959                 return ide_do_reset(drive);
 960         }
 961         BUG_ON(HWGROUP(drive)->handler != NULL);
 962         /* Set the interrupt routine */
 963         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 964         /* Send the actual packet */
 965         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 966         return ide_started;
 967 }
 968
 969
 970 /*
 971  * What we have here is a classic case of a top half / bottom half
 972  * interrupt service routine. In interrupt mode, the device sends
 973  * an interrupt to signal it's ready to receive a packet. However,
 974  * we need to delay about 2-3 ticks before issuing the packet or we
 975  * gets in trouble.
 976  *
 977  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 978  * directly). In either case, when the device says it's ready for a
 979  * packet, we schedule the packet transfer to occur about 2-3 ticks
 980  * later in transfer_pc2.
 981  */
 982 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 983 {
 984         idefloppy_floppy_t *floppy = drive->driver_data;
 985
 986         /* Send the actual packet */
 987         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 988         /* Timeout for the packet command */
 989         return IDEFLOPPY_WAIT_CMD;
 990 }
 991
 992 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 993 {
 994         idefloppy_floppy_t *floppy = drive->driver_data;
 995         ide_startstop_t startstop;
 996         atapi_ireason_t ireason;
 997
 998         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 999                 printk(KERN_ERR "ide-floppy: Strange, packet command "
1000                                 "initiated yet DRQ isn't asserted\n");
1001                 return startstop;
1002         }
1003         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1004         if (!ireason.b.cod || ireason.b.io) {
1005                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1006                                 "while issuing a packet command\n");
1007                 return ide_do_reset(drive);
1008         }
1009         /*
1010          * The following delay solves a problem with ATAPI Zip 100 drives
1011          * where the Busy flag was apparently being deasserted before the
1012          * unit was ready to receive data. This was happening on a
1013          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1014          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1015          * used until after the packet is moved in about 50 msec.
1016          */
1017         BUG_ON(HWGROUP(drive)->handler != NULL);
1018         ide_set_handler(drive,
1019           &idefloppy_pc_intr,           /* service routine for packet command */
1020           floppy->ticks,                /* wait this long before "failing" */
1021           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
1022         return ide_started;
1023 }
1024
1025 /**
1026  * idefloppy_should_report_error()
1027  *
1028  * Supresses error messages resulting from Medium not present
1029  */
1030 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1031 {
1032         if (floppy->sense_key == 0x02 &&
1033             floppy->asc       == 0x3a &&
1034             floppy->ascq      == 0x00)
1035                 return 0;
1036         return 1;
1037 }
1038
1039 /*
1040  *      Issue a packet command
1041  */
1042 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1043 {
1044         idefloppy_floppy_t *floppy = drive->driver_data;
1045         ide_hwif_t *hwif = drive->hwif;
1046         atapi_feature_t feature;
1047         atapi_bcount_t bcount;
1048         ide_handler_t *pkt_xfer_routine;
1049
1050 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1051          and have lived on another thread's stack; that stack may have become
1052          unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1053 #if IDEFLOPPY_DEBUG_BUGS
1054         if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1055             pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1056                 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1057                         "Two request sense in serial were issued\n");
1058         }
1059 #endif /* IDEFLOPPY_DEBUG_BUGS */
1060 #endif
1061
1062         if (floppy->failed_pc == NULL &&
1063             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1064                 floppy->failed_pc = pc;
1065         /* Set the current packet command */
1066         floppy->pc = pc;
1067
1068         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1069             test_bit(PC_ABORT, &pc->flags)) {
1070                 /*
1071                  *      We will "abort" retrying a packet command in case
1072                  *      a legitimate error code was received.
1073                  */
1074                 if (!test_bit(PC_ABORT, &pc->flags)) {
1075                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1076                                 if (idefloppy_should_report_error(floppy))
1077                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1078                                                "pc = %2x, key = %2x, "
1079                                                "asc = %2x, ascq = %2x\n",
1080                                                drive->name, pc->c[0],
1081                                                floppy->sense_key,
1082                                                floppy->asc, floppy->ascq);
1083                         }
1084                         /* Giving up */
1085                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1086                 }
1087                 floppy->failed_pc = NULL;
1088                 pc->callback(drive);
1089                 return ide_stopped;
1090         }
1091
1092         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1093
1094         pc->retries++;
1095         /* We haven't transferred any data yet */
1096         pc->actually_transferred = 0;
1097         pc->current_position = pc->buffer;
1098         bcount.all = min(pc->request_transfer, 63 * 1024);
1099
1100         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1101                 ide_dma_off(drive);
1102
1103         feature.all = 0;
1104
1105         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1106                 feature.b.dma = !hwif->dma_setup(drive);
1107
1108         if (IDE_CONTROL_REG)
1109                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1110         /* Use PIO/DMA */
1111         HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1112         HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1113         HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1114         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1115
1116         if (feature.b.dma) {    /* Begin DMA, if necessary */
1117                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1118                 hwif->dma_start(drive);
1119         }
1120
1121         /* Can we transfer the packet when we get the interrupt or wait? */
1122         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1123                 /* wait */
1124                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1125         } else {
1126                 /* immediate */
1127                 pkt_xfer_routine = &idefloppy_transfer_pc;
1128         }
1129
1130         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1131                 /* Issue the packet command */
1132                 ide_execute_command(drive, WIN_PACKETCMD,
1133                                 pkt_xfer_routine,
1134                                 IDEFLOPPY_WAIT_CMD,
1135                                 NULL);
1136                 return ide_started;
1137         } else {
1138                 /* Issue the packet command */
1139                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1140                 return (*pkt_xfer_routine) (drive);
1141         }
1142 }
1143
1144 static void idefloppy_rw_callback (ide_drive_t *drive)
1145 {
1146         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1147
1148         idefloppy_do_end_request(drive, 1, 0);
1149         return;
1150 }
1151
1152 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1153 {
1154         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1155                 "prevent = %d\n", prevent);
1156
1157         idefloppy_init_pc(pc);
1158         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1159         pc->c[4] = prevent;
1160 }
1161
1162 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1163 {
1164         idefloppy_init_pc(pc);
1165         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1166         pc->c[7] = 255;
1167         pc->c[8] = 255;
1168         pc->request_transfer = 255;
1169 }
1170
1171 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1172                                               int flags)
1173 {
1174         idefloppy_init_pc(pc);
1175         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1176         pc->c[1] = 0x17;
1177
1178         memset(pc->buffer, 0, 12);
1179         pc->buffer[1] = 0xA2;
1180         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1181
1182         if (flags & 1)                          /* Verify bit on... */
1183                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1184         pc->buffer[3] = 8;
1185
1186         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1187         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1188         pc->buffer_size=12;
1189         set_bit(PC_WRITING, &pc->flags);
1190 }
1191
1192 /*
1193  *      A mode sense command is used to "sense" floppy parameters.
1194  */
1195 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1196 {
1197         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1198
1199         idefloppy_init_pc(pc);
1200         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1201         pc->c[1] = 0;
1202         pc->c[2] = page_code + (type << 6);
1203
1204         switch (page_code) {
1205                 case IDEFLOPPY_CAPABILITIES_PAGE:
1206                         length += 12;
1207                         break;
1208                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1209                         length += 32;
1210                         break;
1211                 default:
1212                         printk(KERN_ERR "ide-floppy: unsupported page code "
1213                                 "in create_mode_sense_cmd\n");
1214         }
1215         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1216         pc->request_transfer = length;
1217 }
1218
1219 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1220 {
1221         idefloppy_init_pc(pc);
1222         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1223         pc->c[4] = start;
1224 }
1225
1226 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1227 {
1228         idefloppy_init_pc(pc);
1229         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1230 }
1231
1232 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1233 {
1234         int block = sector / floppy->bs_factor;
1235         int blocks = rq->nr_sectors / floppy->bs_factor;
1236         int cmd = rq_data_dir(rq);
1237
1238         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1239                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1240                 block, blocks);
1241
1242         idefloppy_init_pc(pc);
1243         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1244                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1245                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1246         } else {
1247                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1248                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1249         }
1250         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1251         pc->callback = &idefloppy_rw_callback;
1252         pc->rq = rq;
1253         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1254         if (rq->cmd_flags & REQ_RW)
1255                 set_bit(PC_WRITING, &pc->flags);
1256         pc->buffer = NULL;
1257         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1258         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1259 }
1260
1261 static int
1262 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1263 {
1264         /*
1265          * just support eject for now, it would not be hard to make the
1266          * REQ_BLOCK_PC support fully-featured
1267          */
1268         if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1269                 return 1;
1270
1271         idefloppy_init_pc(pc);
1272         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1273         return 0;
1274 }
1275
1276 /*
1277  *      idefloppy_do_request is our request handling function.
1278  */
1279 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1280 {
1281         idefloppy_floppy_t *floppy = drive->driver_data;
1282         idefloppy_pc_t *pc;
1283         unsigned long block = (unsigned long)block_s;
1284
1285         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1286                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1287                         rq->flags, rq->errors);
1288         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1289                         "current_nr_sectors: %d\n", (long)rq->sector,
1290                         rq->nr_sectors, rq->current_nr_sectors);
1291
1292         if (rq->errors >= ERROR_MAX) {
1293                 if (floppy->failed_pc != NULL) {
1294                         if (idefloppy_should_report_error(floppy))
1295                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1296                                        " key = %2x, asc = %2x, ascq = %2x\n",
1297                                        drive->name, floppy->failed_pc->c[0],
1298                                        floppy->sense_key, floppy->asc, floppy->ascq);
1299                 }
1300                 else
1301                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1302                                 drive->name);
1303                 idefloppy_do_end_request(drive, 0, 0);
1304                 return ide_stopped;
1305         }
1306         if (blk_fs_request(rq)) {
1307                 if (((long)rq->sector % floppy->bs_factor) ||
1308                     (rq->nr_sectors % floppy->bs_factor)) {
1309                         printk("%s: unsupported r/w request size\n",
1310                                 drive->name);
1311                         idefloppy_do_end_request(drive, 0, 0);
1312                         return ide_stopped;
1313                 }
1314                 pc = idefloppy_next_pc_storage(drive);
1315                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1316         } else if (blk_special_request(rq)) {
1317                 pc = (idefloppy_pc_t *) rq->buffer;
1318         } else if (blk_pc_request(rq)) {
1319                 pc = idefloppy_next_pc_storage(drive);
1320                 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1321                         idefloppy_do_end_request(drive, 0, 0);
1322                         return ide_stopped;
1323                 }
1324         } else {
1325                 blk_dump_rq_flags(rq,
1326                         "ide-floppy: unsupported command in queue");
1327                 idefloppy_do_end_request(drive, 0, 0);
1328                 return ide_stopped;
1329         }
1330
1331         pc->rq = rq;
1332         return idefloppy_issue_pc(drive, pc);
1333 }
1334
1335 /*
1336  *      idefloppy_queue_pc_tail adds a special packet command request to the
1337  *      tail of the request queue, and waits for it to be serviced.
1338  */
1339 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1340 {
1341         struct ide_floppy_obj *floppy = drive->driver_data;
1342         struct request rq;
1343
1344         ide_init_drive_cmd (&rq);
1345         rq.buffer = (char *) pc;
1346         rq.cmd_type = REQ_TYPE_SPECIAL;
1347         rq.rq_disk = floppy->disk;
1348
1349         return ide_do_drive_cmd(drive, &rq, ide_wait);
1350 }
1351
1352 /*
1353  *      Look at the flexible disk page parameters. We will ignore the CHS
1354  *      capacity parameters and use the LBA parameters instead.
1355  */
1356 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1357 {
1358         idefloppy_floppy_t *floppy = drive->driver_data;
1359         idefloppy_pc_t pc;
1360         idefloppy_mode_parameter_header_t *header;
1361         idefloppy_flexible_disk_page_t *page;
1362         int capacity, lba_capacity;
1363
1364         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1365         if (idefloppy_queue_pc_tail(drive,&pc)) {
1366                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1367                         "page parameters\n");
1368                 return 1;
1369         }
1370         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1371         floppy->wp = header->wp;
1372         set_disk_ro(floppy->disk, floppy->wp);
1373         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1374
1375         page->transfer_rate = ntohs(page->transfer_rate);
1376         page->sector_size = ntohs(page->sector_size);
1377         page->cyls = ntohs(page->cyls);
1378         page->rpm = ntohs(page->rpm);
1379         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1380         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1381                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1382                                 "%d sector size, %d rpm\n",
1383                         drive->name, capacity / 1024, page->cyls,
1384                         page->heads, page->sectors,
1385                         page->transfer_rate / 8, page->sector_size, page->rpm);
1386
1387         floppy->flexible_disk_page = *page;
1388         drive->bios_cyl = page->cyls;
1389         drive->bios_head = page->heads;
1390         drive->bios_sect = page->sectors;
1391         lba_capacity = floppy->blocks * floppy->block_size;
1392         if (capacity < lba_capacity) {
1393                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1394                         "bytes, but the drive only handles %d\n",
1395                         drive->name, lba_capacity, capacity);
1396                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1397         }
1398         return 0;
1399 }
1400
1401 static int idefloppy_get_capability_page(ide_drive_t *drive)
1402 {
1403         idefloppy_floppy_t *floppy = drive->driver_data;
1404         idefloppy_pc_t pc;
1405         idefloppy_mode_parameter_header_t *header;
1406         idefloppy_capabilities_page_t *page;
1407
1408         floppy->srfp = 0;
1409         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1410                                                  MODE_SENSE_CURRENT);
1411
1412         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1413         if (idefloppy_queue_pc_tail(drive,&pc)) {
1414                 return 1;
1415         }
1416
1417         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1418         page= (idefloppy_capabilities_page_t *)(header+1);
1419         floppy->srfp = page->srfp;
1420         return (0);
1421 }
1422
1423 /*
1424  *      Determine if a media is present in the floppy drive, and if so,
1425  *      its LBA capacity.
1426  */
1427 static int idefloppy_get_capacity (ide_drive_t *drive)
1428 {
1429         idefloppy_floppy_t *floppy = drive->driver_data;
1430         idefloppy_pc_t pc;
1431         idefloppy_capacity_header_t *header;
1432         idefloppy_capacity_descriptor_t *descriptor;
1433         int i, descriptors, rc = 1, blocks, length;
1434
1435         drive->bios_cyl = 0;
1436         drive->bios_head = drive->bios_sect = 0;
1437         floppy->blocks = 0;
1438         floppy->bs_factor = 1;
1439         set_capacity(floppy->disk, 0);
1440
1441         idefloppy_create_read_capacity_cmd(&pc);
1442         if (idefloppy_queue_pc_tail(drive, &pc)) {
1443                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1444                 return 1;
1445         }
1446         header = (idefloppy_capacity_header_t *) pc.buffer;
1447         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1448         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1449
1450         for (i = 0; i < descriptors; i++, descriptor++) {
1451                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1452                 length = descriptor->length = ntohs(descriptor->length);
1453
1454                 if (!i)
1455                 {
1456                 switch (descriptor->dc) {
1457                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1458                 case CAPACITY_UNFORMATTED:
1459                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1460                                 /*
1461                                  * If it is not a clik drive, break out
1462                                  * (maintains previous driver behaviour)
1463                                  */
1464                                 break;
1465                 case CAPACITY_CURRENT:
1466                         /* Normal Zip/LS-120 disks */
1467                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1468                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1469                                         "sector size\n", drive->name,
1470                                         blocks * length / 1024, blocks, length);
1471                         floppy->capacity = *descriptor;
1472                         if (!length || length % 512) {
1473                                 printk(KERN_NOTICE "%s: %d bytes block size "
1474                                         "not supported\n", drive->name, length);
1475                         } else {
1476                                 floppy->blocks = blocks;
1477                                 floppy->block_size = length;
1478                                 if ((floppy->bs_factor = length / 512) != 1)
1479                                         printk(KERN_NOTICE "%s: warning: non "
1480                                                 "512 bytes block size not "
1481                                                 "fully supported\n",
1482                                                 drive->name);
1483                                 rc = 0;
1484                         }
1485                         break;
1486                 case CAPACITY_NO_CARTRIDGE:
1487                         /*
1488                          * This is a KERN_ERR so it appears on screen
1489                          * for the user to see
1490                          */
1491                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1492                         break;
1493                 case CAPACITY_INVALID:
1494                         printk(KERN_ERR "%s: Invalid capacity for disk "
1495                                 "in drive\n", drive->name);
1496                         break;
1497                 }
1498                 }
1499                 if (!i) {
1500                         debug_log( "Descriptor 0 Code: %d\n",
1501                                 descriptor->dc);
1502                 }
1503                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1504                         "sector size\n", i, blocks * length / 1024, blocks,
1505                         length);
1506         }
1507
1508         /* Clik! disk does not support get_flexible_disk_page */
1509         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1510                 (void) idefloppy_get_flexible_disk_page(drive);
1511         }
1512
1513         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1514         return rc;
1515 }
1516
1517 /*
1518 ** Obtain the list of formattable capacities.
1519 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1520 ** descriptors to userland, instead of our own structures.
1521 **
1522 ** Userland gives us the following structure:
1523 **
1524 ** struct idefloppy_format_capacities {
1525 **        int nformats;
1526 **        struct {
1527 **                int nblocks;
1528 **                int blocksize;
1529 **                } formats[];
1530 **        } ;
1531 **
1532 ** userland initializes nformats to the number of allocated formats[]
1533 ** records.  On exit we set nformats to the number of records we've
1534 ** actually initialized.
1535 **
1536 */
1537
1538 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1539 {
1540         idefloppy_pc_t pc;
1541         idefloppy_capacity_header_t *header;
1542         idefloppy_capacity_descriptor_t *descriptor;
1543         int i, descriptors, blocks, length;
1544         int u_array_size;
1545         int u_index;
1546         int __user *argp;
1547
1548         if (get_user(u_array_size, arg))
1549                 return (-EFAULT);
1550
1551         if (u_array_size <= 0)
1552                 return (-EINVAL);
1553
1554         idefloppy_create_read_capacity_cmd(&pc);
1555         if (idefloppy_queue_pc_tail(drive, &pc)) {
1556                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1557                 return (-EIO);
1558         }
1559         header = (idefloppy_capacity_header_t *) pc.buffer;
1560         descriptors = header->length /
1561                 sizeof(idefloppy_capacity_descriptor_t);
1562         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1563
1564         u_index = 0;
1565         argp = arg + 1;
1566
1567         /*
1568         ** We always skip the first capacity descriptor.  That's the
1569         ** current capacity.  We are interested in the remaining descriptors,
1570         ** the formattable capacities.
1571         */
1572
1573         for (i=0; i<descriptors; i++, descriptor++) {
1574                 if (u_index >= u_array_size)
1575                         break;  /* User-supplied buffer too small */
1576                 if (i == 0)
1577                         continue;       /* Skip the first descriptor */
1578
1579                 blocks = ntohl(descriptor->blocks);
1580                 length = ntohs(descriptor->length);
1581
1582                 if (put_user(blocks, argp))
1583                         return(-EFAULT);
1584                 ++argp;
1585
1586                 if (put_user(length, argp))
1587                         return (-EFAULT);
1588                 ++argp;
1589
1590                 ++u_index;
1591         }
1592
1593         if (put_user(u_index, arg))
1594                 return (-EFAULT);
1595         return (0);
1596 }
1597
1598 /*
1599 ** Send ATAPI_FORMAT_UNIT to the drive.
1600 **
1601 ** Userland gives us the following structure:
1602 **
1603 ** struct idefloppy_format_command {
1604 **        int nblocks;
1605 **        int blocksize;
1606 **        int flags;
1607 **        } ;
1608 **
1609 ** flags is a bitmask, currently, the only defined flag is:
1610 **
1611 **        0x01 - verify media after format.
1612 */
1613
1614 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1615 {
1616         int blocks;
1617         int length;
1618         int flags;
1619         idefloppy_pc_t pc;
1620
1621         if (get_user(blocks, arg) ||
1622             get_user(length, arg+1) ||
1623             get_user(flags, arg+2)) {
1624                 return (-EFAULT);
1625         }
1626
1627         /* Get the SFRP bit */
1628         (void) idefloppy_get_capability_page(drive);
1629         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1630         if (idefloppy_queue_pc_tail(drive, &pc)) {
1631                 return (-EIO);
1632         }
1633
1634         return (0);
1635 }
1636
1637 /*
1638 ** Get ATAPI_FORMAT_UNIT progress indication.
1639 **
1640 ** Userland gives a pointer to an int.  The int is set to a progress
1641 ** indicator 0-65536, with 65536=100%.
1642 **
1643 ** If the drive does not support format progress indication, we just check
1644 ** the dsc bit, and return either 0 or 65536.
1645 */
1646
1647 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1648 {
1649         idefloppy_floppy_t *floppy = drive->driver_data;
1650         idefloppy_pc_t pc;
1651         int progress_indication = 0x10000;
1652
1653         if (floppy->srfp) {
1654                 idefloppy_create_request_sense_cmd(&pc);
1655                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1656                         return (-EIO);
1657                 }
1658
1659                 if (floppy->sense_key == 2 &&
1660                     floppy->asc == 4 &&
1661                     floppy->ascq == 4) {
1662                         progress_indication = floppy->progress_indication;
1663                 }
1664                 /* Else assume format_unit has finished, and we're
1665                 ** at 0x10000 */
1666         } else {
1667                 atapi_status_t status;
1668                 unsigned long flags;
1669
1670                 local_irq_save(flags);
1671                 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1672                 local_irq_restore(flags);
1673
1674                 progress_indication = !status.b.dsc ? 0 : 0x10000;
1675         }
1676         if (put_user(progress_indication, arg))
1677                 return (-EFAULT);
1678
1679         return (0);
1680 }
1681
1682 /*
1683  *      Return the current floppy capacity.
1684  */
1685 static sector_t idefloppy_capacity (ide_drive_t *drive)
1686 {
1687         idefloppy_floppy_t *floppy = drive->driver_data;
1688         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1689
1690         return capacity;
1691 }
1692
1693 /*
1694  *      idefloppy_identify_device checks if we can support a drive,
1695  *      based on the ATAPI IDENTIFY command results.
1696  */
1697 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1698 {
1699         struct idefloppy_id_gcw gcw;
1700 #if IDEFLOPPY_DEBUG_INFO
1701         u16 mask,i;
1702         char buffer[80];
1703 #endif /* IDEFLOPPY_DEBUG_INFO */
1704
1705         *((u16 *) &gcw) = id->config;
1706
1707 #ifdef CONFIG_PPC
1708         /* kludge for Apple PowerBook internal zip */
1709         if ((gcw.device_type == 5) &&
1710             !strstr(id->model, "CD-ROM") &&
1711             strstr(id->model, "ZIP"))
1712                 gcw.device_type = 0;
1713 #endif
1714
1715 #if IDEFLOPPY_DEBUG_INFO
1716         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1717         switch (gcw.protocol) {
1718                 case 0: case 1: sprintf(buffer, "ATA");break;
1719                 case 2: sprintf(buffer, "ATAPI");break;
1720                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1721         }
1722         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1723         switch (gcw.device_type) {
1724                 case 0: sprintf(buffer, "Direct-access Device");break;
1725                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1726                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1727                 case 5: sprintf(buffer, "CD-ROM Device");break;
1728                 case 6: sprintf(buffer, "Reserved");
1729                 case 7: sprintf(buffer, "Optical memory Device");break;
1730                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1731                 default: sprintf(buffer, "Reserved");
1732         }
1733         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1734         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1735         switch (gcw.drq_type) {
1736                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1737                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1738                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1739                 case 3: sprintf(buffer, "Reserved");break;
1740         }
1741         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1742         switch (gcw.packet_size) {
1743                 case 0: sprintf(buffer, "12 bytes");break;
1744                 case 1: sprintf(buffer, "16 bytes");break;
1745                 default: sprintf(buffer, "Reserved");break;
1746         }
1747         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1748         printk(KERN_INFO "Model: %.40s\n",id->model);
1749         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1750         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1751         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1752         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1753         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1754         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1755         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1756         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1757         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1758         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1759         printk(KERN_INFO "Single Word DMA supported modes:\n");
1760         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1761                 if (id->dma_1word & mask)
1762                         printk(KERN_INFO "   Mode %d%s\n", i,
1763                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1764         }
1765         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1766         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1767                 if (id->dma_mword & mask)
1768                         printk(KERN_INFO "   Mode %d%s\n", i,
1769                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1770         }
1771         if (id->field_valid & 0x0002) {
1772                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1773                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1774                 if (id->eide_dma_min == 0)
1775                         sprintf(buffer, "Not supported");
1776                 else
1777                         sprintf(buffer, "%d ns",id->eide_dma_min);
1778                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1779                 if (id->eide_dma_time == 0)
1780                         sprintf(buffer, "Not supported");
1781                 else
1782                         sprintf(buffer, "%d ns",id->eide_dma_time);
1783                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1784                 if (id->eide_pio == 0)
1785                         sprintf(buffer, "Not supported");
1786                 else
1787                         sprintf(buffer, "%d ns",id->eide_pio);
1788                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1789                         buffer);
1790                 if (id->eide_pio_iordy == 0)
1791                         sprintf(buffer, "Not supported");
1792                 else
1793                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1794                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1795         } else
1796                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1797 #endif /* IDEFLOPPY_DEBUG_INFO */
1798
1799         if (gcw.protocol != 2)
1800                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1801         else if (gcw.device_type != 0)
1802                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1803         else if (!gcw.removable)
1804                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1805         else if (gcw.drq_type == 3) {
1806                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1807         } else if (gcw.packet_size != 0) {
1808                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1809         } else
1810                 return 1;
1811         return 0;
1812 }
1813
1814 #ifdef CONFIG_IDE_PROC_FS
1815 static void idefloppy_add_settings(ide_drive_t *drive)
1816 {
1817         idefloppy_floppy_t *floppy = drive->driver_data;
1818
1819 /*
1820  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1821  */
1822         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1823         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1824         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1825         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1826 }
1827 #else
1828 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1829 #endif
1830
1831 /*
1832  *      Driver initialization.
1833  */
1834 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1835 {
1836         struct idefloppy_id_gcw gcw;
1837
1838         *((u16 *) &gcw) = drive->id->config;
1839         floppy->pc = floppy->pc_stack;
1840         if (gcw.drq_type == 1)
1841                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1842         /*
1843          *      We used to check revisions here. At this point however
1844          *      I'm giving up. Just assume they are all broken, its easier.
1845          *
1846          *      The actual reason for the workarounds was likely
1847          *      a driver bug after all rather than a firmware bug,
1848          *      and the workaround below used to hide it. It should
1849          *      be fixed as of version 1.9, but to be on the safe side
1850          *      we'll leave the limitation below for the 2.2.x tree.
1851          */
1852
1853         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1854                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1855                 /* This value will be visible in the /proc/ide/hdx/settings */
1856                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1857                 blk_queue_max_sectors(drive->queue, 64);
1858         }
1859
1860         /*
1861         *      Guess what?  The IOMEGA Clik! drive also needs the
1862         *      above fix.  It makes nasty clicking noises without
1863         *      it, so please don't remove this.
1864         */
1865         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1866                 blk_queue_max_sectors(drive->queue, 64);
1867                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1868         }
1869
1870
1871         (void) idefloppy_get_capacity(drive);
1872         idefloppy_add_settings(drive);
1873 }
1874
1875 static void ide_floppy_remove(ide_drive_t *drive)
1876 {
1877         idefloppy_floppy_t *floppy = drive->driver_data;
1878         struct gendisk *g = floppy->disk;
1879
1880         ide_proc_unregister_driver(drive, floppy->driver);
1881
1882         del_gendisk(g);
1883
1884         ide_floppy_put(floppy);
1885 }
1886
1887 static void ide_floppy_release(struct kref *kref)
1888 {
1889         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1890         ide_drive_t *drive = floppy->drive;
1891         struct gendisk *g = floppy->disk;
1892
1893         drive->driver_data = NULL;
1894         g->private_data = NULL;
1895         put_disk(g);
1896         kfree(floppy);
1897 }
1898
1899 #ifdef CONFIG_IDE_PROC_FS
1900 static int proc_idefloppy_read_capacity
1901         (char *page, char **start, off_t off, int count, int *eof, void *data)
1902 {
1903         ide_drive_t*drive = (ide_drive_t *)data;
1904         int len;
1905
1906         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1907         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1908 }
1909
1910 static ide_proc_entry_t idefloppy_proc[] = {
1911         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1912         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1913         { NULL, 0, NULL, NULL }
1914 };
1915 #endif  /* CONFIG_IDE_PROC_FS */
1916
1917 static int ide_floppy_probe(ide_drive_t *);
1918
1919 static ide_driver_t idefloppy_driver = {
1920         .gen_driver = {
1921                 .owner          = THIS_MODULE,
1922                 .name           = "ide-floppy",
1923                 .bus            = &ide_bus_type,
1924         },
1925         .probe                  = ide_floppy_probe,
1926         .remove                 = ide_floppy_remove,
1927         .version                = IDEFLOPPY_VERSION,
1928         .media                  = ide_floppy,
1929         .supports_dsc_overlap   = 0,
1930         .do_request             = idefloppy_do_request,
1931         .end_request            = idefloppy_do_end_request,
1932         .error                  = __ide_error,
1933         .abort                  = __ide_abort,
1934 #ifdef CONFIG_IDE_PROC_FS
1935         .proc                   = idefloppy_proc,
1936 #endif
1937 };
1938
1939 static int idefloppy_open(struct inode *inode, struct file *filp)
1940 {
1941         struct gendisk *disk = inode->i_bdev->bd_disk;
1942         struct ide_floppy_obj *floppy;
1943         ide_drive_t *drive;
1944         idefloppy_pc_t pc;
1945         int ret = 0;
1946
1947         debug_log(KERN_INFO "Reached idefloppy_open\n");
1948
1949         if (!(floppy = ide_floppy_get(disk)))
1950                 return -ENXIO;
1951
1952         drive = floppy->drive;
1953
1954         floppy->openers++;
1955
1956         if (floppy->openers == 1) {
1957                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1958                 /* Just in case */
1959
1960                 idefloppy_create_test_unit_ready_cmd(&pc);
1961                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1962                         idefloppy_create_start_stop_cmd(&pc, 1);
1963                         (void) idefloppy_queue_pc_tail(drive, &pc);
1964                 }
1965
1966                 if (idefloppy_get_capacity (drive)
1967                    && (filp->f_flags & O_NDELAY) == 0
1968                     /*
1969                     ** Allow O_NDELAY to open a drive without a disk, or with
1970                     ** an unreadable disk, so that we can get the format
1971                     ** capacity of the drive or begin the format - Sam
1972                     */
1973                     ) {
1974                         ret = -EIO;
1975                         goto out_put_floppy;
1976                 }
1977
1978                 if (floppy->wp && (filp->f_mode & 2)) {
1979                         ret = -EROFS;
1980                         goto out_put_floppy;
1981                 }
1982                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1983                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1984                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1985                         idefloppy_create_prevent_cmd(&pc, 1);
1986                         (void) idefloppy_queue_pc_tail(drive, &pc);
1987                 }
1988                 check_disk_change(inode->i_bdev);
1989         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1990                 ret = -EBUSY;
1991                 goto out_put_floppy;
1992         }
1993         return 0;
1994
1995 out_put_floppy:
1996         floppy->openers--;
1997         ide_floppy_put(floppy);
1998         return ret;
1999 }
2000
2001 static int idefloppy_release(struct inode *inode, struct file *filp)
2002 {
2003         struct gendisk *disk = inode->i_bdev->bd_disk;
2004         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2005         ide_drive_t *drive = floppy->drive;
2006         idefloppy_pc_t pc;
2007
2008         debug_log(KERN_INFO "Reached idefloppy_release\n");
2009
2010         if (floppy->openers == 1) {
2011                 /* IOMEGA Clik! drives do not support lock/unlock commands */
2012                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2013                         idefloppy_create_prevent_cmd(&pc, 0);
2014                         (void) idefloppy_queue_pc_tail(drive, &pc);
2015                 }
2016
2017                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2018         }
2019
2020         floppy->openers--;
2021
2022         ide_floppy_put(floppy);
2023
2024         return 0;
2025 }
2026
2027 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2028 {
2029         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2030         ide_drive_t *drive = floppy->drive;
2031
2032         geo->heads = drive->bios_head;
2033         geo->sectors = drive->bios_sect;
2034         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2035         return 0;
2036 }
2037
2038 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2039                         unsigned int cmd, unsigned long arg)
2040 {
2041         struct block_device *bdev = inode->i_bdev;
2042         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2043         ide_drive_t *drive = floppy->drive;
2044         void __user *argp = (void __user *)arg;
2045         int err;
2046         int prevent = (arg) ? 1 : 0;
2047         idefloppy_pc_t pc;
2048
2049         switch (cmd) {
2050         case CDROMEJECT:
2051                 prevent = 0;
2052                 /* fall through */
2053         case CDROM_LOCKDOOR:
2054                 if (floppy->openers > 1)
2055                         return -EBUSY;
2056
2057                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2058                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2059                         idefloppy_create_prevent_cmd(&pc, prevent);
2060                         (void) idefloppy_queue_pc_tail(drive, &pc);
2061                 }
2062                 if (cmd == CDROMEJECT) {
2063                         idefloppy_create_start_stop_cmd(&pc, 2);
2064                         (void) idefloppy_queue_pc_tail(drive, &pc);
2065                 }
2066                 return 0;
2067         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2068                 return 0;
2069         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2070                 return idefloppy_get_format_capacities(drive, argp);
2071         case IDEFLOPPY_IOCTL_FORMAT_START:
2072
2073                 if (!(file->f_mode & 2))
2074                         return -EPERM;
2075
2076                 if (floppy->openers > 1) {
2077                         /* Don't format if someone is using the disk */
2078
2079                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2080                                   &floppy->flags);
2081                         return -EBUSY;
2082                 }
2083
2084                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2085
2086                 err = idefloppy_begin_format(drive, argp);
2087                 if (err)
2088                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2089                 return err;
2090                 /*
2091                 ** Note, the bit will be cleared when the device is
2092                 ** closed.  This is the cleanest way to handle the
2093                 ** situation where the drive does not support
2094                 ** format progress reporting.
2095                 */
2096         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2097                 return idefloppy_get_format_progress(drive, argp);
2098         }
2099         return generic_ide_ioctl(drive, file, bdev, cmd, arg);
2100 }
2101
2102 static int idefloppy_media_changed(struct gendisk *disk)
2103 {
2104         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2105         ide_drive_t *drive = floppy->drive;
2106
2107         /* do not scan partitions twice if this is a removable device */
2108         if (drive->attach) {
2109                 drive->attach = 0;
2110                 return 0;
2111         }
2112         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2113 }
2114
2115 static int idefloppy_revalidate_disk(struct gendisk *disk)
2116 {
2117         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2118         set_capacity(disk, idefloppy_capacity(floppy->drive));
2119         return 0;
2120 }
2121
2122 static struct block_device_operations idefloppy_ops = {
2123         .owner          = THIS_MODULE,
2124         .open           = idefloppy_open,
2125         .release        = idefloppy_release,
2126         .ioctl          = idefloppy_ioctl,
2127         .getgeo         = idefloppy_getgeo,
2128         .media_changed  = idefloppy_media_changed,
2129         .revalidate_disk= idefloppy_revalidate_disk
2130 };
2131
2132 static int ide_floppy_probe(ide_drive_t *drive)
2133 {
2134         idefloppy_floppy_t *floppy;
2135         struct gendisk *g;
2136
2137         if (!strstr("ide-floppy", drive->driver_req))
2138                 goto failed;
2139         if (!drive->present)
2140                 goto failed;
2141         if (drive->media != ide_floppy)
2142                 goto failed;
2143         if (!idefloppy_identify_device (drive, drive->id)) {
2144                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2145                 goto failed;
2146         }
2147         if (drive->scsi) {
2148                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2149                 goto failed;
2150         }
2151         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2152                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2153                 goto failed;
2154         }
2155
2156         g = alloc_disk(1 << PARTN_BITS);
2157         if (!g)
2158                 goto out_free_floppy;
2159
2160         ide_init_disk(g, drive);
2161
2162         ide_proc_register_driver(drive, &idefloppy_driver);
2163
2164         kref_init(&floppy->kref);
2165
2166         floppy->drive = drive;
2167         floppy->driver = &idefloppy_driver;
2168         floppy->disk = g;
2169
2170         g->private_data = &floppy->driver;
2171
2172         drive->driver_data = floppy;
2173
2174         idefloppy_setup (drive, floppy);
2175
2176         g->minors = 1 << PARTN_BITS;
2177         g->driverfs_dev = &drive->gendev;
2178         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2179         g->fops = &idefloppy_ops;
2180         drive->attach = 1;
2181         add_disk(g);
2182         return 0;
2183
2184 out_free_floppy:
2185         kfree(floppy);
2186 failed:
2187         return -ENODEV;
2188 }
2189
2190 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2191
2192 static void __exit idefloppy_exit (void)
2193 {
2194         driver_unregister(&idefloppy_driver.gen_driver);
2195 }
2196
2197 static int __init idefloppy_init(void)
2198 {
2199         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2200         return driver_register(&idefloppy_driver.gen_driver);
2201 }
2202
2203 MODULE_ALIAS("ide:*m-floppy*");
2204 module_init(idefloppy_init);
2205 module_exit(idefloppy_exit);
2206 MODULE_LICENSE("GPL");