drivers/ide/ide-floppy.c

   1 /*
   2  * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
   3  * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
   4  */
   5
   6 /*
   7  * IDE ATAPI floppy driver.
   8  *
   9  * The driver currently doesn't have any fancy features, just the bare
  10  * minimum read/write support.
  11  *
  12  * This driver supports the following IDE floppy drives:
  13  *
  14  * LS-120/240 SuperDisk
  15  * Iomega Zip 100/250
  16  * Iomega PC Card Clik!/PocketZip
  17  *
  18  * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
  19  * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
  20  *
  21  * Ver 0.1   Oct 17 96   Initial test version, mostly based on ide-tape.c.
  22  * Ver 0.2   Oct 31 96   Minor changes.
  23  * Ver 0.3   Dec  2 96   Fixed error recovery bug.
  24  * Ver 0.4   Jan 26 97   Add support for the HDIO_GETGEO ioctl.
  25  * Ver 0.5   Feb 21 97   Add partitions support.
  26  *                       Use the minimum of the LBA and CHS capacities.
  27  *                       Avoid hwgroup->rq == NULL on the last irq.
  28  *                       Fix potential null dereferencing with DEBUG_LOG.
  29  * Ver 0.8   Dec  7 97   Increase irq timeout from 10 to 50 seconds.
  30  *                       Add media write-protect detection.
  31  *                       Issue START command only if TEST UNIT READY fails.
  32  *                       Add work-around for IOMEGA ZIP revision 21.D.
  33  *                       Remove idefloppy_get_capabilities().
  34  * Ver 0.9   Jul  4 99   Fix a bug which might have caused the number of
  35  *                        bytes requested on each interrupt to be zero.
  36  *                        Thanks to <shanos@es.co.nz> for pointing this out.
  37  * Ver 0.9.sv Jan 6 01   Sam Varshavchik <mrsam@courier-mta.com>
  38  *                       Implement low level formatting.  Reimplemented
  39  *                       IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
  40  *                       bit.  My LS-120 drive barfs on
  41  *                       IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
  42  *                       Compromise by not reporting a failure to get this
  43  *                       mode page.  Implemented four IOCTLs in order to
  44  *                       implement formatting.  IOCTls begin with 0x4600,
  45  *                       0x46 is 'F' as in Format.
  46  *            Jan 9 01   Userland option to select format verify.
  47  *                       Added PC_SUPPRESS_ERROR flag - some idefloppy drives
  48  *                       do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
  49  *                       return a sense error.  Suppress error reporting in
  50  *                       this particular case in order to avoid spurious
  51  *                       errors in syslog.  The culprit is
  52  *                       idefloppy_get_capability_page(), so move it to
  53  *                       idefloppy_begin_format() so that it's not used
  54  *                       unless absolutely necessary.
  55  *                       If drive does not support format progress indication
  56  *                       monitor the dsc bit in the status register.
  57  *                       Also, O_NDELAY on open will allow the device to be
  58  *                       opened without a disk available.  This can be used to
  59  *                       open an unformatted disk, or get the device capacity.
  60  * Ver 0.91  Dec 11 99   Added IOMEGA Clik! drive support by
  61  *                 <paul@paulbristow.net>
  62  * Ver 0.92  Oct 22 00   Paul Bristow became official maintainer for this
  63  *                         driver.  Included Powerbook internal zip kludge.
  64  * Ver 0.93  Oct 24 00   Fixed bugs for Clik! drive
  65  *                        no disk on insert and disk change now works
  66  * Ver 0.94  Oct 27 00   Tidied up to remove strstr(Clik) everywhere
  67  * Ver 0.95  Nov  7 00   Brought across to kernel 2.4
  68  * Ver 0.96  Jan  7 01   Actually in line with release version of 2.4.0
  69  *                       including set_bit patch from Rusty Russell
  70  * Ver 0.97  Jul 22 01   Merge 0.91-0.96 onto 0.9.sv for ac series
  71  * Ver 0.97.sv Aug 3 01  Backported from 2.4.7-ac3
  72  * Ver 0.98  Oct 26 01   Split idefloppy_transfer_pc into two pieces to
  73  *                        fix a lost interrupt problem. It appears the busy
  74  *                        bit was being deasserted by my IOMEGA ATAPI ZIP 100
  75  *                        drive before the drive was actually ready.
  76  * Ver 0.98a Oct 29 01   Expose delay value so we can play.
  77  * Ver 0.99  Feb 24 02   Remove duplicate code, modify clik! detection code
  78  *                        to support new PocketZip drives
  79  */
  80
  81 #define IDEFLOPPY_VERSION "0.99.newide"
  82
  83 #include <linux/module.h>
  84 #include <linux/types.h>
  85 #include <linux/string.h>
  86 #include <linux/kernel.h>
  87 #include <linux/delay.h>
  88 #include <linux/timer.h>
  89 #include <linux/mm.h>
  90 #include <linux/interrupt.h>
  91 #include <linux/major.h>
  92 #include <linux/errno.h>
  93 #include <linux/genhd.h>
  94 #include <linux/slab.h>
  95 #include <linux/cdrom.h>
  96 #include <linux/ide.h>
  97 #include <linux/bitops.h>
  98 #include <linux/mutex.h>
  99
 100 #include <scsi/scsi_ioctl.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 /*
 371  *      Error codes which are returned in rq->errors to the higher part
 372  *      of the driver.
 373  */
 374 #define IDEFLOPPY_ERROR_GENERAL         101
 375
 376 /*
 377  *      The following is used to format the general configuration word of
 378  *      the ATAPI IDENTIFY DEVICE command.
 379  */
 380 struct idefloppy_id_gcw {
 381 #if defined(__LITTLE_ENDIAN_BITFIELD)
 382         unsigned packet_size            :2;     /* Packet Size */
 383         unsigned reserved234            :3;     /* Reserved */
 384         unsigned drq_type               :2;     /* Command packet DRQ type */
 385         unsigned removable              :1;     /* Removable media */
 386         unsigned device_type            :5;     /* Device type */
 387         unsigned reserved13             :1;     /* Reserved */
 388         unsigned protocol               :2;     /* Protocol type */
 389 #elif defined(__BIG_ENDIAN_BITFIELD)
 390         unsigned protocol               :2;     /* Protocol type */
 391         unsigned reserved13             :1;     /* Reserved */
 392         unsigned device_type            :5;     /* Device type */
 393         unsigned removable              :1;     /* Removable media */
 394         unsigned drq_type               :2;     /* Command packet DRQ type */
 395         unsigned reserved234            :3;     /* Reserved */
 396         unsigned packet_size            :2;     /* Packet Size */
 397 #else
 398 #error "Bitfield endianness not defined! Check your byteorder.h"
 399 #endif
 400 };
 401
 402 /*
 403  *      INQUIRY packet command - Data Format
 404  */
 405 typedef struct {
 406 #if defined(__LITTLE_ENDIAN_BITFIELD)
 407         unsigned        device_type     :5;     /* Peripheral Device Type */
 408         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 409         unsigned        reserved1_6t0   :7;     /* Reserved */
 410         unsigned        rmb             :1;     /* Removable Medium Bit */
 411         unsigned        ansi_version    :3;     /* ANSI Version */
 412         unsigned        ecma_version    :3;     /* ECMA Version */
 413         unsigned        iso_version     :2;     /* ISO Version */
 414         unsigned        response_format :4;     /* Response Data Format */
 415         unsigned        reserved3_45    :2;     /* Reserved */
 416         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 417         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 418 #elif defined(__BIG_ENDIAN_BITFIELD)
 419         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 420         unsigned        device_type     :5;     /* Peripheral Device Type */
 421         unsigned        rmb             :1;     /* Removable Medium Bit */
 422         unsigned        reserved1_6t0   :7;     /* Reserved */
 423         unsigned        iso_version     :2;     /* ISO Version */
 424         unsigned        ecma_version    :3;     /* ECMA Version */
 425         unsigned        ansi_version    :3;     /* ANSI Version */
 426         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 427         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 428         unsigned        reserved3_45    :2;     /* Reserved */
 429         unsigned        response_format :4;     /* Response Data Format */
 430 #else
 431 #error "Bitfield endianness not defined! Check your byteorder.h"
 432 #endif
 433         u8              additional_length;      /* Additional Length (total_length-4) */
 434         u8              rsv5, rsv6, rsv7;       /* Reserved */
 435         u8              vendor_id[8];           /* Vendor Identification */
 436         u8              product_id[16];         /* Product Identification */
 437         u8              revision_level[4];      /* Revision Level */
 438         u8              vendor_specific[20];    /* Vendor Specific - Optional */
 439         u8              reserved56t95[40];      /* Reserved - Optional */
 440                                                 /* Additional information may be returned */
 441 } idefloppy_inquiry_result_t;
 442
 443 /*
 444  *      REQUEST SENSE packet command result - Data Format.
 445  */
 446 typedef struct {
 447 #if defined(__LITTLE_ENDIAN_BITFIELD)
 448         unsigned        error_code      :7;     /* Current error (0x70) */
 449         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 450         u8              reserved1       :8;     /* Reserved */
 451         unsigned        sense_key       :4;     /* Sense Key */
 452         unsigned        reserved2_4     :1;     /* Reserved */
 453         unsigned        ili             :1;     /* Incorrect Length Indicator */
 454         unsigned        reserved2_67    :2;
 455 #elif defined(__BIG_ENDIAN_BITFIELD)
 456         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 457         unsigned        error_code      :7;     /* Current error (0x70) */
 458         u8              reserved1       :8;     /* Reserved */
 459         unsigned        reserved2_67    :2;
 460         unsigned        ili             :1;     /* Incorrect Length Indicator */
 461         unsigned        reserved2_4     :1;     /* Reserved */
 462         unsigned        sense_key       :4;     /* Sense Key */
 463 #else
 464 #error "Bitfield endianness not defined! Check your byteorder.h"
 465 #endif
 466         u32             information __attribute__ ((packed));
 467         u8              asl;                    /* Additional sense length (n-7) */
 468         u32             command_specific;       /* Additional command specific information */
 469         u8              asc;                    /* Additional Sense Code */
 470         u8              ascq;                   /* Additional Sense Code Qualifier */
 471         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
 472         u8              sksv[3];
 473         u8              pad[2];                 /* Padding to 20 bytes */
 474 } idefloppy_request_sense_result_t;
 475
 476 /*
 477  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
 478  */
 479 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 480 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 481
 482 /*
 483  *      Mode Parameter Header for the MODE SENSE packet command
 484  */
 485 typedef struct {
 486         u16             mode_data_length;       /* Length of the following data transfer */
 487         u8              medium_type;            /* Medium Type */
 488 #if defined(__LITTLE_ENDIAN_BITFIELD)
 489         unsigned        reserved3       :7;
 490         unsigned        wp              :1;     /* Write protect */
 491 #elif defined(__BIG_ENDIAN_BITFIELD)
 492         unsigned        wp              :1;     /* Write protect */
 493         unsigned        reserved3       :7;
 494 #else
 495 #error "Bitfield endianness not defined! Check your byteorder.h"
 496 #endif
 497         u8              reserved[4];
 498 } idefloppy_mode_parameter_header_t;
 499
 500 static DEFINE_MUTEX(idefloppy_ref_mutex);
 501
 502 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 503
 504 #define ide_floppy_g(disk) \
 505         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 506
 507 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 508 {
 509         struct ide_floppy_obj *floppy = NULL;
 510
 511         mutex_lock(&idefloppy_ref_mutex);
 512         floppy = ide_floppy_g(disk);
 513         if (floppy)
 514                 kref_get(&floppy->kref);
 515         mutex_unlock(&idefloppy_ref_mutex);
 516         return floppy;
 517 }
 518
 519 static void ide_floppy_release(struct kref *);
 520
 521 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 522 {
 523         mutex_lock(&idefloppy_ref_mutex);
 524         kref_put(&floppy->kref, ide_floppy_release);
 525         mutex_unlock(&idefloppy_ref_mutex);
 526 }
 527
 528 /*
 529  *      Too bad. The drive wants to send us data which we are not ready to accept.
 530  *      Just throw it away.
 531  */
 532 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 533 {
 534         while (bcount--)
 535                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 536 }
 537
 538 #if IDEFLOPPY_DEBUG_BUGS
 539 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 540 {
 541         while (bcount--)
 542                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 543 }
 544 #endif /* IDEFLOPPY_DEBUG_BUGS */
 545
 546
 547 /*
 548  *      idefloppy_do_end_request is used to finish servicing a request.
 549  *
 550  *      For read/write requests, we will call ide_end_request to pass to the
 551  *      next buffer.
 552  */
 553 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 554 {
 555         idefloppy_floppy_t *floppy = drive->driver_data;
 556         struct request *rq = HWGROUP(drive)->rq;
 557         int error;
 558
 559         debug_log(KERN_INFO "Reached idefloppy_end_request\n");
 560
 561         switch (uptodate) {
 562                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 563                 case 1: error = 0; break;
 564                 default: error = uptodate;
 565         }
 566         if (error)
 567                 floppy->failed_pc = NULL;
 568         /* Why does this happen? */
 569         if (!rq)
 570                 return 0;
 571         if (!blk_special_request(rq)) {
 572                 /* our real local end request function */
 573                 ide_end_request(drive, uptodate, nsecs);
 574                 return 0;
 575         }
 576         rq->errors = error;
 577         /* fixme: need to move this local also */
 578         ide_end_drive_cmd(drive, 0, 0);
 579         return 0;
 580 }
 581
 582 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 583 {
 584         struct request *rq = pc->rq;
 585         struct bio_vec *bvec;
 586         struct req_iterator iter;
 587         unsigned long flags;
 588         char *data;
 589         int count, done = 0;
 590
 591         rq_for_each_segment(bvec, rq, iter) {
 592                 if (!bcount)
 593                         break;
 594
 595                 count = min(bvec->bv_len, bcount);
 596
 597                 data = bvec_kmap_irq(bvec, &flags);
 598                 drive->hwif->atapi_input_bytes(drive, data, count);
 599                 bvec_kunmap_irq(data, &flags);
 600
 601                 bcount -= count;
 602                 pc->b_count += count;
 603                 done += count;
 604         }
 605
 606         idefloppy_do_end_request(drive, 1, done >> 9);
 607
 608         if (bcount) {
 609                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 610                 idefloppy_discard_data(drive, bcount);
 611         }
 612 }
 613
 614 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 615 {
 616         struct request *rq = pc->rq;
 617         struct req_iterator iter;
 618         struct bio_vec *bvec;
 619         unsigned long flags;
 620         int count, done = 0;
 621         char *data;
 622
 623         rq_for_each_segment(bvec, rq, iter) {
 624                 if (!bcount)
 625                         break;
 626
 627                 count = min(bvec->bv_len, bcount);
 628
 629                 data = bvec_kmap_irq(bvec, &flags);
 630                 drive->hwif->atapi_output_bytes(drive, data, count);
 631                 bvec_kunmap_irq(data, &flags);
 632
 633                 bcount -= count;
 634                 pc->b_count += count;
 635                 done += count;
 636         }
 637
 638         idefloppy_do_end_request(drive, 1, done >> 9);
 639
 640 #if IDEFLOPPY_DEBUG_BUGS
 641         if (bcount) {
 642                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 643                 idefloppy_write_zeros(drive, bcount);
 644         }
 645 #endif
 646 }
 647
 648 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 649 {
 650         struct request *rq = pc->rq;
 651         struct bio *bio = rq->bio;
 652
 653         while ((bio = rq->bio) != NULL)
 654                 idefloppy_do_end_request(drive, 1, 0);
 655 }
 656
 657 /*
 658  *      idefloppy_queue_pc_head generates a new packet command request in front
 659  *      of the request queue, before the current request, so that it will be
 660  *      processed immediately, on the next pass through the driver.
 661  */
 662 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 663 {
 664         struct ide_floppy_obj *floppy = drive->driver_data;
 665
 666         ide_init_drive_cmd(rq);
 667         rq->buffer = (char *) pc;
 668         rq->cmd_type = REQ_TYPE_SPECIAL;
 669         rq->rq_disk = floppy->disk;
 670         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 671 }
 672
 673 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 674 {
 675         idefloppy_floppy_t *floppy = drive->driver_data;
 676
 677         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 678                 floppy->pc_stack_index=0;
 679         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 680 }
 681
 682 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 683 {
 684         idefloppy_floppy_t *floppy = drive->driver_data;
 685
 686         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 687                 floppy->rq_stack_index = 0;
 688         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 689 }
 690
 691 /*
 692  *      idefloppy_analyze_error is called on each failed packet command retry
 693  *      to analyze the request sense.
 694  */
 695 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
 696 {
 697         idefloppy_floppy_t *floppy = drive->driver_data;
 698
 699         floppy->sense_key = result->sense_key;
 700         floppy->asc = result->asc;
 701         floppy->ascq = result->ascq;
 702         floppy->progress_indication = result->sksv[0] & 0x80 ?
 703                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
 704         if (floppy->failed_pc)
 705                 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
 706                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
 707                         result->sense_key, result->asc, result->ascq);
 708         else
 709                 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
 710                         "ascq = %x\n", result->sense_key,
 711                         result->asc, result->ascq);
 712 }
 713
 714 static void idefloppy_request_sense_callback (ide_drive_t *drive)
 715 {
 716         idefloppy_floppy_t *floppy = drive->driver_data;
 717
 718         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 719
 720         if (!floppy->pc->error) {
 721                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
 722                 idefloppy_do_end_request(drive, 1, 0);
 723         } else {
 724                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
 725                 idefloppy_do_end_request(drive, 0, 0);
 726         }
 727 }
 728
 729 /*
 730  *      General packet command callback function.
 731  */
 732 static void idefloppy_pc_callback (ide_drive_t *drive)
 733 {
 734         idefloppy_floppy_t *floppy = drive->driver_data;
 735
 736         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 737
 738         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 739 }
 740
 741 /*
 742  *      idefloppy_init_pc initializes a packet command.
 743  */
 744 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 745 {
 746         memset(pc->c, 0, 12);
 747         pc->retries = 0;
 748         pc->flags = 0;
 749         pc->request_transfer = 0;
 750         pc->buffer = pc->pc_buffer;
 751         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 752         pc->callback = &idefloppy_pc_callback;
 753 }
 754
 755 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 756 {
 757         idefloppy_init_pc(pc);
 758         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
 759         pc->c[4] = 255;
 760         pc->request_transfer = 18;
 761         pc->callback = &idefloppy_request_sense_callback;
 762 }
 763
 764 /*
 765  *      idefloppy_retry_pc is called when an error was detected during the
 766  *      last packet command. We queue a request sense packet command in
 767  *      the head of the request list.
 768  */
 769 static void idefloppy_retry_pc (ide_drive_t *drive)
 770 {
 771         idefloppy_pc_t *pc;
 772         struct request *rq;
 773
 774         (void)drive->hwif->INB(IDE_ERROR_REG);
 775         pc = idefloppy_next_pc_storage(drive);
 776         rq = idefloppy_next_rq_storage(drive);
 777         idefloppy_create_request_sense_cmd(pc);
 778         idefloppy_queue_pc_head(drive, pc, rq);
 779 }
 780
 781 /*
 782  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 783  *      during a packet command.
 784  */
 785 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 786 {
 787         idefloppy_floppy_t *floppy = drive->driver_data;
 788         ide_hwif_t *hwif = drive->hwif;
 789         idefloppy_pc_t *pc = floppy->pc;
 790         struct request *rq = pc->rq;
 791         unsigned int temp;
 792         u16 bcount;
 793         u8 stat, ireason;
 794
 795         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
 796                 __FUNCTION__);
 797
 798         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 799                 if (HWIF(drive)->ide_dma_end(drive)) {
 800                         set_bit(PC_DMA_ERROR, &pc->flags);
 801                 } else {
 802                         pc->actually_transferred = pc->request_transfer;
 803                         idefloppy_update_buffers(drive, pc);
 804                 }
 805                 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
 806         }
 807
 808         /* Clear the interrupt */
 809         stat = drive->hwif->INB(IDE_STATUS_REG);
 810
 811         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 812                 debug_log(KERN_INFO "Packet command completed, %d bytes "
 813                         "transferred\n", pc->actually_transferred);
 814                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 815
 816                 local_irq_enable_in_hardirq();
 817
 818                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 819                         /* Error detected */
 820                         debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
 821                                 drive->name);
 822                         rq->errors++;
 823                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
 824                                 printk(KERN_ERR "ide-floppy: I/O error in "
 825                                         "request sense command\n");
 826                                 return ide_do_reset(drive);
 827                         }
 828                         /* Retry operation */
 829                         idefloppy_retry_pc(drive);
 830                         /* queued, but not started */
 831                         return ide_stopped;
 832                 }
 833                 pc->error = 0;
 834                 if (floppy->failed_pc == pc)
 835                         floppy->failed_pc = NULL;
 836                 /* Command finished - Call the callback function */
 837                 pc->callback(drive);
 838                 return ide_stopped;
 839         }
 840
 841         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 842                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 843                         "more interrupts in DMA mode\n");
 844                 ide_dma_off(drive);
 845                 return ide_do_reset(drive);
 846         }
 847
 848         /* Get the number of bytes to transfer */
 849         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 850                   hwif->INB(IDE_BCOUNTL_REG);
 851         /* on this interrupt */
 852         ireason = hwif->INB(IDE_IREASON_REG);
 853
 854         if (ireason & CD) {
 855                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 856                 return ide_do_reset(drive);
 857         }
 858         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 859                 /* Hopefully, we will never get here */
 860                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 861                                 (ireason & IO) ? "Write" : "Read");
 862                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 863                                 (ireason & IO) ? "Read" : "Write");
 864                 return ide_do_reset(drive);
 865         }
 866         if (!test_bit(PC_WRITING, &pc->flags)) {
 867                 /* Reading - Check that we have enough space */
 868                 temp = pc->actually_transferred + bcount;
 869                 if (temp > pc->request_transfer) {
 870                         if (temp > pc->buffer_size) {
 871                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 872                                         "to send us more data than expected "
 873                                         "- discarding data\n");
 874                                 idefloppy_discard_data(drive, bcount);
 875                                 BUG_ON(HWGROUP(drive)->handler != NULL);
 876                                 ide_set_handler(drive,
 877                                                 &idefloppy_pc_intr,
 878                                                 IDEFLOPPY_WAIT_CMD,
 879                                                 NULL);
 880                                 return ide_started;
 881                         }
 882                         debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
 883                                 "send us more data than expected - "
 884                                 "allowing transfer\n");
 885                 }
 886         }
 887         if (test_bit(PC_WRITING, &pc->flags)) {
 888                 if (pc->buffer != NULL)
 889                         /* Write the current buffer */
 890                         hwif->atapi_output_bytes(drive, pc->current_position,
 891                                                  bcount);
 892                 else
 893                         idefloppy_output_buffers(drive, pc, bcount);
 894         } else {
 895                 if (pc->buffer != NULL)
 896                         /* Read the current buffer */
 897                         hwif->atapi_input_bytes(drive, pc->current_position,
 898                                                 bcount);
 899                 else
 900                         idefloppy_input_buffers(drive, pc, bcount);
 901         }
 902         /* Update the current position */
 903         pc->actually_transferred += bcount;
 904         pc->current_position += bcount;
 905
 906         BUG_ON(HWGROUP(drive)->handler != NULL);
 907         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 908         return ide_started;
 909 }
 910
 911 /*
 912  * This is the original routine that did the packet transfer.
 913  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 914  * for that drive below. The algorithm is chosen based on drive type
 915  */
 916 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 917 {
 918         ide_startstop_t startstop;
 919         idefloppy_floppy_t *floppy = drive->driver_data;
 920         u8 ireason;
 921
 922         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 923                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 924                                 "initiated yet DRQ isn't asserted\n");
 925                 return startstop;
 926         }
 927         ireason = drive->hwif->INB(IDE_IREASON_REG);
 928         if ((ireason & CD) == 0 || (ireason & IO)) {
 929                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 930                                 "issuing a packet command\n");
 931                 return ide_do_reset(drive);
 932         }
 933         BUG_ON(HWGROUP(drive)->handler != NULL);
 934         /* Set the interrupt routine */
 935         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 936         /* Send the actual packet */
 937         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 938         return ide_started;
 939 }
 940
 941
 942 /*
 943  * What we have here is a classic case of a top half / bottom half
 944  * interrupt service routine. In interrupt mode, the device sends
 945  * an interrupt to signal it's ready to receive a packet. However,
 946  * we need to delay about 2-3 ticks before issuing the packet or we
 947  * gets in trouble.
 948  *
 949  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 950  * directly). In either case, when the device says it's ready for a
 951  * packet, we schedule the packet transfer to occur about 2-3 ticks
 952  * later in transfer_pc2.
 953  */
 954 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 955 {
 956         idefloppy_floppy_t *floppy = drive->driver_data;
 957
 958         /* Send the actual packet */
 959         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 960         /* Timeout for the packet command */
 961         return IDEFLOPPY_WAIT_CMD;
 962 }
 963
 964 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 965 {
 966         idefloppy_floppy_t *floppy = drive->driver_data;
 967         ide_startstop_t startstop;
 968         u8 ireason;
 969
 970         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 971                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 972                                 "initiated yet DRQ isn't asserted\n");
 973                 return startstop;
 974         }
 975         ireason = drive->hwif->INB(IDE_IREASON_REG);
 976         if ((ireason & CD) == 0 || (ireason & IO)) {
 977                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 978                                 "while issuing a packet command\n");
 979                 return ide_do_reset(drive);
 980         }
 981         /*
 982          * The following delay solves a problem with ATAPI Zip 100 drives
 983          * where the Busy flag was apparently being deasserted before the
 984          * unit was ready to receive data. This was happening on a
 985          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 986          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 987          * used until after the packet is moved in about 50 msec.
 988          */
 989         BUG_ON(HWGROUP(drive)->handler != NULL);
 990         ide_set_handler(drive,
 991           &idefloppy_pc_intr,           /* service routine for packet command */
 992           floppy->ticks,                /* wait this long before "failing" */
 993           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 994         return ide_started;
 995 }
 996
 997 /**
 998  * idefloppy_should_report_error()
 999  *
1000  * Supresses error messages resulting from Medium not present
1001  */
1002 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1003 {
1004         if (floppy->sense_key == 0x02 &&
1005             floppy->asc       == 0x3a &&
1006             floppy->ascq      == 0x00)
1007                 return 0;
1008         return 1;
1009 }
1010
1011 /*
1012  *      Issue a packet command
1013  */
1014 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1015 {
1016         idefloppy_floppy_t *floppy = drive->driver_data;
1017         ide_hwif_t *hwif = drive->hwif;
1018         ide_handler_t *pkt_xfer_routine;
1019         u16 bcount;
1020         u8 dma;
1021
1022         if (floppy->failed_pc == NULL &&
1023             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1024                 floppy->failed_pc = pc;
1025         /* Set the current packet command */
1026         floppy->pc = pc;
1027
1028         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1029             test_bit(PC_ABORT, &pc->flags)) {
1030                 /*
1031                  *      We will "abort" retrying a packet command in case
1032                  *      a legitimate error code was received.
1033                  */
1034                 if (!test_bit(PC_ABORT, &pc->flags)) {
1035                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1036                                 if (idefloppy_should_report_error(floppy))
1037                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1038                                                "pc = %2x, key = %2x, "
1039                                                "asc = %2x, ascq = %2x\n",
1040                                                drive->name, pc->c[0],
1041                                                floppy->sense_key,
1042                                                floppy->asc, floppy->ascq);
1043                         }
1044                         /* Giving up */
1045                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1046                 }
1047                 floppy->failed_pc = NULL;
1048                 pc->callback(drive);
1049                 return ide_stopped;
1050         }
1051
1052         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1053
1054         pc->retries++;
1055         /* We haven't transferred any data yet */
1056         pc->actually_transferred = 0;
1057         pc->current_position = pc->buffer;
1058         bcount = min(pc->request_transfer, 63 * 1024);
1059
1060         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1061                 ide_dma_off(drive);
1062
1063         dma = 0;
1064
1065         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1066                 dma = !hwif->dma_setup(drive);
1067
1068         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
1069                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
1070
1071         if (dma) {      /* Begin DMA, if necessary */
1072                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1073                 hwif->dma_start(drive);
1074         }
1075
1076         /* Can we transfer the packet when we get the interrupt or wait? */
1077         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1078                 /* wait */
1079                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1080         } else {
1081                 /* immediate */
1082                 pkt_xfer_routine = &idefloppy_transfer_pc;
1083         }
1084
1085         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1086                 /* Issue the packet command */
1087                 ide_execute_command(drive, WIN_PACKETCMD,
1088                                 pkt_xfer_routine,
1089                                 IDEFLOPPY_WAIT_CMD,
1090                                 NULL);
1091                 return ide_started;
1092         } else {
1093                 /* Issue the packet command */
1094                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1095                 return (*pkt_xfer_routine) (drive);
1096         }
1097 }
1098
1099 static void idefloppy_rw_callback (ide_drive_t *drive)
1100 {
1101         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1102
1103         idefloppy_do_end_request(drive, 1, 0);
1104         return;
1105 }
1106
1107 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1108 {
1109         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1110                 "prevent = %d\n", prevent);
1111
1112         idefloppy_init_pc(pc);
1113         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1114         pc->c[4] = prevent;
1115 }
1116
1117 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1118 {
1119         idefloppy_init_pc(pc);
1120         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1121         pc->c[7] = 255;
1122         pc->c[8] = 255;
1123         pc->request_transfer = 255;
1124 }
1125
1126 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1127                                               int flags)
1128 {
1129         idefloppy_init_pc(pc);
1130         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1131         pc->c[1] = 0x17;
1132
1133         memset(pc->buffer, 0, 12);
1134         pc->buffer[1] = 0xA2;
1135         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1136
1137         if (flags & 1)                          /* Verify bit on... */
1138                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1139         pc->buffer[3] = 8;
1140
1141         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1142         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1143         pc->buffer_size=12;
1144         set_bit(PC_WRITING, &pc->flags);
1145 }
1146
1147 /*
1148  *      A mode sense command is used to "sense" floppy parameters.
1149  */
1150 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1151 {
1152         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1153
1154         idefloppy_init_pc(pc);
1155         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1156         pc->c[1] = 0;
1157         pc->c[2] = page_code + (type << 6);
1158
1159         switch (page_code) {
1160                 case IDEFLOPPY_CAPABILITIES_PAGE:
1161                         length += 12;
1162                         break;
1163                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1164                         length += 32;
1165                         break;
1166                 default:
1167                         printk(KERN_ERR "ide-floppy: unsupported page code "
1168                                 "in create_mode_sense_cmd\n");
1169         }
1170         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1171         pc->request_transfer = length;
1172 }
1173
1174 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1175 {
1176         idefloppy_init_pc(pc);
1177         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1178         pc->c[4] = start;
1179 }
1180
1181 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1182 {
1183         idefloppy_init_pc(pc);
1184         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1185 }
1186
1187 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1188 {
1189         int block = sector / floppy->bs_factor;
1190         int blocks = rq->nr_sectors / floppy->bs_factor;
1191         int cmd = rq_data_dir(rq);
1192
1193         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1194                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1195                 block, blocks);
1196
1197         idefloppy_init_pc(pc);
1198         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1199                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1200                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1201         } else {
1202                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1203                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1204         }
1205         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1206         pc->callback = &idefloppy_rw_callback;
1207         pc->rq = rq;
1208         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1209         if (rq->cmd_flags & REQ_RW)
1210                 set_bit(PC_WRITING, &pc->flags);
1211         pc->buffer = NULL;
1212         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1213         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1214 }
1215
1216 static void
1217 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1218 {
1219         idefloppy_init_pc(pc);
1220         pc->callback = &idefloppy_rw_callback;
1221         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1222         pc->rq = rq;
1223         pc->b_count = rq->data_len;
1224         if (rq->data_len && rq_data_dir(rq) == WRITE)
1225                 set_bit(PC_WRITING, &pc->flags);
1226         pc->buffer = rq->data;
1227         if (rq->bio)
1228                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1229
1230         /*
1231          * possibly problematic, doesn't look like ide-floppy correctly
1232          * handled scattered requests if dma fails...
1233          */
1234         pc->request_transfer = pc->buffer_size = rq->data_len;
1235 }
1236
1237 /*
1238  *      idefloppy_do_request is our request handling function.
1239  */
1240 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1241 {
1242         idefloppy_floppy_t *floppy = drive->driver_data;
1243         idefloppy_pc_t *pc;
1244         unsigned long block = (unsigned long)block_s;
1245
1246         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1247                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1248                         rq->flags, rq->errors);
1249         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1250                         "current_nr_sectors: %d\n", (long)rq->sector,
1251                         rq->nr_sectors, rq->current_nr_sectors);
1252
1253         if (rq->errors >= ERROR_MAX) {
1254                 if (floppy->failed_pc != NULL) {
1255                         if (idefloppy_should_report_error(floppy))
1256                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1257                                        " key = %2x, asc = %2x, ascq = %2x\n",
1258                                        drive->name, floppy->failed_pc->c[0],
1259                                        floppy->sense_key, floppy->asc, floppy->ascq);
1260                 }
1261                 else
1262                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1263                                 drive->name);
1264                 idefloppy_do_end_request(drive, 0, 0);
1265                 return ide_stopped;
1266         }
1267         if (blk_fs_request(rq)) {
1268                 if (((long)rq->sector % floppy->bs_factor) ||
1269                     (rq->nr_sectors % floppy->bs_factor)) {
1270                         printk("%s: unsupported r/w request size\n",
1271                                 drive->name);
1272                         idefloppy_do_end_request(drive, 0, 0);
1273                         return ide_stopped;
1274                 }
1275                 pc = idefloppy_next_pc_storage(drive);
1276                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1277         } else if (blk_special_request(rq)) {
1278                 pc = (idefloppy_pc_t *) rq->buffer;
1279         } else if (blk_pc_request(rq)) {
1280                 pc = idefloppy_next_pc_storage(drive);
1281                 idefloppy_blockpc_cmd(floppy, pc, rq);
1282         } else {
1283                 blk_dump_rq_flags(rq,
1284                         "ide-floppy: unsupported command in queue");
1285                 idefloppy_do_end_request(drive, 0, 0);
1286                 return ide_stopped;
1287         }
1288
1289         pc->rq = rq;
1290         return idefloppy_issue_pc(drive, pc);
1291 }
1292
1293 /*
1294  *      idefloppy_queue_pc_tail adds a special packet command request to the
1295  *      tail of the request queue, and waits for it to be serviced.
1296  */
1297 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1298 {
1299         struct ide_floppy_obj *floppy = drive->driver_data;
1300         struct request rq;
1301
1302         ide_init_drive_cmd (&rq);
1303         rq.buffer = (char *) pc;
1304         rq.cmd_type = REQ_TYPE_SPECIAL;
1305         rq.rq_disk = floppy->disk;
1306
1307         return ide_do_drive_cmd(drive, &rq, ide_wait);
1308 }
1309
1310 /*
1311  *      Look at the flexible disk page parameters. We will ignore the CHS
1312  *      capacity parameters and use the LBA parameters instead.
1313  */
1314 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1315 {
1316         idefloppy_floppy_t *floppy = drive->driver_data;
1317         idefloppy_pc_t pc;
1318         idefloppy_mode_parameter_header_t *header;
1319         idefloppy_flexible_disk_page_t *page;
1320         int capacity, lba_capacity;
1321
1322         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1323         if (idefloppy_queue_pc_tail(drive,&pc)) {
1324                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1325                         "page parameters\n");
1326                 return 1;
1327         }
1328         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1329         floppy->wp = header->wp;
1330         set_disk_ro(floppy->disk, floppy->wp);
1331         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1332
1333         page->transfer_rate = ntohs(page->transfer_rate);
1334         page->sector_size = ntohs(page->sector_size);
1335         page->cyls = ntohs(page->cyls);
1336         page->rpm = ntohs(page->rpm);
1337         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1338         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1339                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1340                                 "%d sector size, %d rpm\n",
1341                         drive->name, capacity / 1024, page->cyls,
1342                         page->heads, page->sectors,
1343                         page->transfer_rate / 8, page->sector_size, page->rpm);
1344
1345         floppy->flexible_disk_page = *page;
1346         drive->bios_cyl = page->cyls;
1347         drive->bios_head = page->heads;
1348         drive->bios_sect = page->sectors;
1349         lba_capacity = floppy->blocks * floppy->block_size;
1350         if (capacity < lba_capacity) {
1351                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1352                         "bytes, but the drive only handles %d\n",
1353                         drive->name, lba_capacity, capacity);
1354                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1355         }
1356         return 0;
1357 }
1358
1359 static int idefloppy_get_capability_page(ide_drive_t *drive)
1360 {
1361         idefloppy_floppy_t *floppy = drive->driver_data;
1362         idefloppy_pc_t pc;
1363         idefloppy_mode_parameter_header_t *header;
1364         idefloppy_capabilities_page_t *page;
1365
1366         floppy->srfp = 0;
1367         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1368                                                  MODE_SENSE_CURRENT);
1369
1370         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1371         if (idefloppy_queue_pc_tail(drive,&pc)) {
1372                 return 1;
1373         }
1374
1375         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1376         page= (idefloppy_capabilities_page_t *)(header+1);
1377         floppy->srfp = page->srfp;
1378         return (0);
1379 }
1380
1381 /*
1382  *      Determine if a media is present in the floppy drive, and if so,
1383  *      its LBA capacity.
1384  */
1385 static int idefloppy_get_capacity (ide_drive_t *drive)
1386 {
1387         idefloppy_floppy_t *floppy = drive->driver_data;
1388         idefloppy_pc_t pc;
1389         idefloppy_capacity_header_t *header;
1390         idefloppy_capacity_descriptor_t *descriptor;
1391         int i, descriptors, rc = 1, blocks, length;
1392
1393         drive->bios_cyl = 0;
1394         drive->bios_head = drive->bios_sect = 0;
1395         floppy->blocks = 0;
1396         floppy->bs_factor = 1;
1397         set_capacity(floppy->disk, 0);
1398
1399         idefloppy_create_read_capacity_cmd(&pc);
1400         if (idefloppy_queue_pc_tail(drive, &pc)) {
1401                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1402                 return 1;
1403         }
1404         header = (idefloppy_capacity_header_t *) pc.buffer;
1405         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1406         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1407
1408         for (i = 0; i < descriptors; i++, descriptor++) {
1409                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1410                 length = descriptor->length = ntohs(descriptor->length);
1411
1412                 if (!i)
1413                 {
1414                 switch (descriptor->dc) {
1415                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1416                 case CAPACITY_UNFORMATTED:
1417                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1418                                 /*
1419                                  * If it is not a clik drive, break out
1420                                  * (maintains previous driver behaviour)
1421                                  */
1422                                 break;
1423                 case CAPACITY_CURRENT:
1424                         /* Normal Zip/LS-120 disks */
1425                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1426                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1427                                         "sector size\n", drive->name,
1428                                         blocks * length / 1024, blocks, length);
1429                         floppy->capacity = *descriptor;
1430                         if (!length || length % 512) {
1431                                 printk(KERN_NOTICE "%s: %d bytes block size "
1432                                         "not supported\n", drive->name, length);
1433                         } else {
1434                                 floppy->blocks = blocks;
1435                                 floppy->block_size = length;
1436                                 if ((floppy->bs_factor = length / 512) != 1)
1437                                         printk(KERN_NOTICE "%s: warning: non "
1438                                                 "512 bytes block size not "
1439                                                 "fully supported\n",
1440                                                 drive->name);
1441                                 rc = 0;
1442                         }
1443                         break;
1444                 case CAPACITY_NO_CARTRIDGE:
1445                         /*
1446                          * This is a KERN_ERR so it appears on screen
1447                          * for the user to see
1448                          */
1449                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1450                         break;
1451                 case CAPACITY_INVALID:
1452                         printk(KERN_ERR "%s: Invalid capacity for disk "
1453                                 "in drive\n", drive->name);
1454                         break;
1455                 }
1456                 }
1457                 if (!i) {
1458                         debug_log( "Descriptor 0 Code: %d\n",
1459                                 descriptor->dc);
1460                 }
1461                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1462                         "sector size\n", i, blocks * length / 1024, blocks,
1463                         length);
1464         }
1465
1466         /* Clik! disk does not support get_flexible_disk_page */
1467         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1468                 (void) idefloppy_get_flexible_disk_page(drive);
1469         }
1470
1471         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1472         return rc;
1473 }
1474
1475 /*
1476 ** Obtain the list of formattable capacities.
1477 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1478 ** descriptors to userland, instead of our own structures.
1479 **
1480 ** Userland gives us the following structure:
1481 **
1482 ** struct idefloppy_format_capacities {
1483 **        int nformats;
1484 **        struct {
1485 **                int nblocks;
1486 **                int blocksize;
1487 **                } formats[];
1488 **        } ;
1489 **
1490 ** userland initializes nformats to the number of allocated formats[]
1491 ** records.  On exit we set nformats to the number of records we've
1492 ** actually initialized.
1493 **
1494 */
1495
1496 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1497 {
1498         idefloppy_pc_t pc;
1499         idefloppy_capacity_header_t *header;
1500         idefloppy_capacity_descriptor_t *descriptor;
1501         int i, descriptors, blocks, length;
1502         int u_array_size;
1503         int u_index;
1504         int __user *argp;
1505
1506         if (get_user(u_array_size, arg))
1507                 return (-EFAULT);
1508
1509         if (u_array_size <= 0)
1510                 return (-EINVAL);
1511
1512         idefloppy_create_read_capacity_cmd(&pc);
1513         if (idefloppy_queue_pc_tail(drive, &pc)) {
1514                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1515                 return (-EIO);
1516         }
1517         header = (idefloppy_capacity_header_t *) pc.buffer;
1518         descriptors = header->length /
1519                 sizeof(idefloppy_capacity_descriptor_t);
1520         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1521
1522         u_index = 0;
1523         argp = arg + 1;
1524
1525         /*
1526         ** We always skip the first capacity descriptor.  That's the
1527         ** current capacity.  We are interested in the remaining descriptors,
1528         ** the formattable capacities.
1529         */
1530
1531         for (i=0; i<descriptors; i++, descriptor++) {
1532                 if (u_index >= u_array_size)
1533                         break;  /* User-supplied buffer too small */
1534                 if (i == 0)
1535                         continue;       /* Skip the first descriptor */
1536
1537                 blocks = ntohl(descriptor->blocks);
1538                 length = ntohs(descriptor->length);
1539
1540                 if (put_user(blocks, argp))
1541                         return(-EFAULT);
1542                 ++argp;
1543
1544                 if (put_user(length, argp))
1545                         return (-EFAULT);
1546                 ++argp;
1547
1548                 ++u_index;
1549         }
1550
1551         if (put_user(u_index, arg))
1552                 return (-EFAULT);
1553         return (0);
1554 }
1555
1556 /*
1557 ** Send ATAPI_FORMAT_UNIT to the drive.
1558 **
1559 ** Userland gives us the following structure:
1560 **
1561 ** struct idefloppy_format_command {
1562 **        int nblocks;
1563 **        int blocksize;
1564 **        int flags;
1565 **        } ;
1566 **
1567 ** flags is a bitmask, currently, the only defined flag is:
1568 **
1569 **        0x01 - verify media after format.
1570 */
1571
1572 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1573 {
1574         int blocks;
1575         int length;
1576         int flags;
1577         idefloppy_pc_t pc;
1578
1579         if (get_user(blocks, arg) ||
1580             get_user(length, arg+1) ||
1581             get_user(flags, arg+2)) {
1582                 return (-EFAULT);
1583         }
1584
1585         /* Get the SFRP bit */
1586         (void) idefloppy_get_capability_page(drive);
1587         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1588         if (idefloppy_queue_pc_tail(drive, &pc)) {
1589                 return (-EIO);
1590         }
1591
1592         return (0);
1593 }
1594
1595 /*
1596 ** Get ATAPI_FORMAT_UNIT progress indication.
1597 **
1598 ** Userland gives a pointer to an int.  The int is set to a progress
1599 ** indicator 0-65536, with 65536=100%.
1600 **
1601 ** If the drive does not support format progress indication, we just check
1602 ** the dsc bit, and return either 0 or 65536.
1603 */
1604
1605 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1606 {
1607         idefloppy_floppy_t *floppy = drive->driver_data;
1608         idefloppy_pc_t pc;
1609         int progress_indication = 0x10000;
1610
1611         if (floppy->srfp) {
1612                 idefloppy_create_request_sense_cmd(&pc);
1613                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1614                         return (-EIO);
1615                 }
1616
1617                 if (floppy->sense_key == 2 &&
1618                     floppy->asc == 4 &&
1619                     floppy->ascq == 4) {
1620                         progress_indication = floppy->progress_indication;
1621                 }
1622                 /* Else assume format_unit has finished, and we're
1623                 ** at 0x10000 */
1624         } else {
1625                 unsigned long flags;
1626                 u8 stat;
1627
1628                 local_irq_save(flags);
1629                 stat = drive->hwif->INB(IDE_STATUS_REG);
1630                 local_irq_restore(flags);
1631
1632                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1633         }
1634         if (put_user(progress_indication, arg))
1635                 return (-EFAULT);
1636
1637         return (0);
1638 }
1639
1640 /*
1641  *      Return the current floppy capacity.
1642  */
1643 static sector_t idefloppy_capacity (ide_drive_t *drive)
1644 {
1645         idefloppy_floppy_t *floppy = drive->driver_data;
1646         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1647
1648         return capacity;
1649 }
1650
1651 /*
1652  *      idefloppy_identify_device checks if we can support a drive,
1653  *      based on the ATAPI IDENTIFY command results.
1654  */
1655 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1656 {
1657         struct idefloppy_id_gcw gcw;
1658 #if IDEFLOPPY_DEBUG_INFO
1659         char buffer[80];
1660 #endif /* IDEFLOPPY_DEBUG_INFO */
1661
1662         *((u16 *) &gcw) = id->config;
1663
1664 #ifdef CONFIG_PPC
1665         /* kludge for Apple PowerBook internal zip */
1666         if ((gcw.device_type == 5) &&
1667             !strstr(id->model, "CD-ROM") &&
1668             strstr(id->model, "ZIP"))
1669                 gcw.device_type = 0;
1670 #endif
1671
1672 #if IDEFLOPPY_DEBUG_INFO
1673         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1674         switch (gcw.protocol) {
1675                 case 0: case 1: sprintf(buffer, "ATA");break;
1676                 case 2: sprintf(buffer, "ATAPI");break;
1677                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1678         }
1679         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1680         switch (gcw.device_type) {
1681                 case 0: sprintf(buffer, "Direct-access Device");break;
1682                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1683                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1684                 case 5: sprintf(buffer, "CD-ROM Device");break;
1685                 case 6: sprintf(buffer, "Reserved");
1686                 case 7: sprintf(buffer, "Optical memory Device");break;
1687                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1688                 default: sprintf(buffer, "Reserved");
1689         }
1690         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1691         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1692         switch (gcw.drq_type) {
1693                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1694                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1695                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1696                 case 3: sprintf(buffer, "Reserved");break;
1697         }
1698         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1699         switch (gcw.packet_size) {
1700                 case 0: sprintf(buffer, "12 bytes");break;
1701                 case 1: sprintf(buffer, "16 bytes");break;
1702                 default: sprintf(buffer, "Reserved");break;
1703         }
1704         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1705 #endif /* IDEFLOPPY_DEBUG_INFO */
1706
1707         if (gcw.protocol != 2)
1708                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1709         else if (gcw.device_type != 0)
1710                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1711         else if (!gcw.removable)
1712                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1713         else if (gcw.drq_type == 3) {
1714                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1715         } else if (gcw.packet_size != 0) {
1716                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1717         } else
1718                 return 1;
1719         return 0;
1720 }
1721
1722 #ifdef CONFIG_IDE_PROC_FS
1723 static void idefloppy_add_settings(ide_drive_t *drive)
1724 {
1725         idefloppy_floppy_t *floppy = drive->driver_data;
1726
1727 /*
1728  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1729  */
1730         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1731         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1732         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1733         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1734 }
1735 #else
1736 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1737 #endif
1738
1739 /*
1740  *      Driver initialization.
1741  */
1742 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1743 {
1744         struct idefloppy_id_gcw gcw;
1745
1746         *((u16 *) &gcw) = drive->id->config;
1747         floppy->pc = floppy->pc_stack;
1748         if (gcw.drq_type == 1)
1749                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1750         /*
1751          *      We used to check revisions here. At this point however
1752          *      I'm giving up. Just assume they are all broken, its easier.
1753          *
1754          *      The actual reason for the workarounds was likely
1755          *      a driver bug after all rather than a firmware bug,
1756          *      and the workaround below used to hide it. It should
1757          *      be fixed as of version 1.9, but to be on the safe side
1758          *      we'll leave the limitation below for the 2.2.x tree.
1759          */
1760
1761         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1762                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1763                 /* This value will be visible in the /proc/ide/hdx/settings */
1764                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1765                 blk_queue_max_sectors(drive->queue, 64);
1766         }
1767
1768         /*
1769         *      Guess what?  The IOMEGA Clik! drive also needs the
1770         *      above fix.  It makes nasty clicking noises without
1771         *      it, so please don't remove this.
1772         */
1773         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1774                 blk_queue_max_sectors(drive->queue, 64);
1775                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1776         }
1777
1778
1779         (void) idefloppy_get_capacity(drive);
1780         idefloppy_add_settings(drive);
1781 }
1782
1783 static void ide_floppy_remove(ide_drive_t *drive)
1784 {
1785         idefloppy_floppy_t *floppy = drive->driver_data;
1786         struct gendisk *g = floppy->disk;
1787
1788         ide_proc_unregister_driver(drive, floppy->driver);
1789
1790         del_gendisk(g);
1791
1792         ide_floppy_put(floppy);
1793 }
1794
1795 static void ide_floppy_release(struct kref *kref)
1796 {
1797         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1798         ide_drive_t *drive = floppy->drive;
1799         struct gendisk *g = floppy->disk;
1800
1801         drive->driver_data = NULL;
1802         g->private_data = NULL;
1803         put_disk(g);
1804         kfree(floppy);
1805 }
1806
1807 #ifdef CONFIG_IDE_PROC_FS
1808 static int proc_idefloppy_read_capacity
1809         (char *page, char **start, off_t off, int count, int *eof, void *data)
1810 {
1811         ide_drive_t*drive = (ide_drive_t *)data;
1812         int len;
1813
1814         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1815         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1816 }
1817
1818 static ide_proc_entry_t idefloppy_proc[] = {
1819         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1820         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1821         { NULL, 0, NULL, NULL }
1822 };
1823 #endif  /* CONFIG_IDE_PROC_FS */
1824
1825 static int ide_floppy_probe(ide_drive_t *);
1826
1827 static ide_driver_t idefloppy_driver = {
1828         .gen_driver = {
1829                 .owner          = THIS_MODULE,
1830                 .name           = "ide-floppy",
1831                 .bus            = &ide_bus_type,
1832         },
1833         .probe                  = ide_floppy_probe,
1834         .remove                 = ide_floppy_remove,
1835         .version                = IDEFLOPPY_VERSION,
1836         .media                  = ide_floppy,
1837         .supports_dsc_overlap   = 0,
1838         .do_request             = idefloppy_do_request,
1839         .end_request            = idefloppy_do_end_request,
1840         .error                  = __ide_error,
1841         .abort                  = __ide_abort,
1842 #ifdef CONFIG_IDE_PROC_FS
1843         .proc                   = idefloppy_proc,
1844 #endif
1845 };
1846
1847 static int idefloppy_open(struct inode *inode, struct file *filp)
1848 {
1849         struct gendisk *disk = inode->i_bdev->bd_disk;
1850         struct ide_floppy_obj *floppy;
1851         ide_drive_t *drive;
1852         idefloppy_pc_t pc;
1853         int ret = 0;
1854
1855         debug_log(KERN_INFO "Reached idefloppy_open\n");
1856
1857         if (!(floppy = ide_floppy_get(disk)))
1858                 return -ENXIO;
1859
1860         drive = floppy->drive;
1861
1862         floppy->openers++;
1863
1864         if (floppy->openers == 1) {
1865                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1866                 /* Just in case */
1867
1868                 idefloppy_create_test_unit_ready_cmd(&pc);
1869                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1870                         idefloppy_create_start_stop_cmd(&pc, 1);
1871                         (void) idefloppy_queue_pc_tail(drive, &pc);
1872                 }
1873
1874                 if (idefloppy_get_capacity (drive)
1875                    && (filp->f_flags & O_NDELAY) == 0
1876                     /*
1877                     ** Allow O_NDELAY to open a drive without a disk, or with
1878                     ** an unreadable disk, so that we can get the format
1879                     ** capacity of the drive or begin the format - Sam
1880                     */
1881                     ) {
1882                         ret = -EIO;
1883                         goto out_put_floppy;
1884                 }
1885
1886                 if (floppy->wp && (filp->f_mode & 2)) {
1887                         ret = -EROFS;
1888                         goto out_put_floppy;
1889                 }
1890                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1891                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1892                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1893                         idefloppy_create_prevent_cmd(&pc, 1);
1894                         (void) idefloppy_queue_pc_tail(drive, &pc);
1895                 }
1896                 check_disk_change(inode->i_bdev);
1897         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1898                 ret = -EBUSY;
1899                 goto out_put_floppy;
1900         }
1901         return 0;
1902
1903 out_put_floppy:
1904         floppy->openers--;
1905         ide_floppy_put(floppy);
1906         return ret;
1907 }
1908
1909 static int idefloppy_release(struct inode *inode, struct file *filp)
1910 {
1911         struct gendisk *disk = inode->i_bdev->bd_disk;
1912         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1913         ide_drive_t *drive = floppy->drive;
1914         idefloppy_pc_t pc;
1915
1916         debug_log(KERN_INFO "Reached idefloppy_release\n");
1917
1918         if (floppy->openers == 1) {
1919                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1920                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1921                         idefloppy_create_prevent_cmd(&pc, 0);
1922                         (void) idefloppy_queue_pc_tail(drive, &pc);
1923                 }
1924
1925                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1926         }
1927
1928         floppy->openers--;
1929
1930         ide_floppy_put(floppy);
1931
1932         return 0;
1933 }
1934
1935 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1936 {
1937         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1938         ide_drive_t *drive = floppy->drive;
1939
1940         geo->heads = drive->bios_head;
1941         geo->sectors = drive->bios_sect;
1942         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1943         return 0;
1944 }
1945
1946 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1947                         unsigned int cmd, unsigned long arg)
1948 {
1949         struct block_device *bdev = inode->i_bdev;
1950         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1951         ide_drive_t *drive = floppy->drive;
1952         void __user *argp = (void __user *)arg;
1953         int err;
1954         int prevent = (arg) ? 1 : 0;
1955         idefloppy_pc_t pc;
1956
1957         switch (cmd) {
1958         case CDROMEJECT:
1959                 prevent = 0;
1960                 /* fall through */
1961         case CDROM_LOCKDOOR:
1962                 if (floppy->openers > 1)
1963                         return -EBUSY;
1964
1965                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
1966                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1967                         idefloppy_create_prevent_cmd(&pc, prevent);
1968                         (void) idefloppy_queue_pc_tail(drive, &pc);
1969                 }
1970                 if (cmd == CDROMEJECT) {
1971                         idefloppy_create_start_stop_cmd(&pc, 2);
1972                         (void) idefloppy_queue_pc_tail(drive, &pc);
1973                 }
1974                 return 0;
1975         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1976                 return 0;
1977         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1978                 return idefloppy_get_format_capacities(drive, argp);
1979         case IDEFLOPPY_IOCTL_FORMAT_START:
1980
1981                 if (!(file->f_mode & 2))
1982                         return -EPERM;
1983
1984                 if (floppy->openers > 1) {
1985                         /* Don't format if someone is using the disk */
1986
1987                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1988                                   &floppy->flags);
1989                         return -EBUSY;
1990                 }
1991
1992                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1993
1994                 err = idefloppy_begin_format(drive, argp);
1995                 if (err)
1996                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1997                 return err;
1998                 /*
1999                 ** Note, the bit will be cleared when the device is
2000                 ** closed.  This is the cleanest way to handle the
2001                 ** situation where the drive does not support
2002                 ** format progress reporting.
2003                 */
2004         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2005                 return idefloppy_get_format_progress(drive, argp);
2006         }
2007
2008         /*
2009          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2010          * and CDROM_SEND_PACKET (legacy) ioctls
2011          */
2012         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2013                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2014                                         bdev->bd_disk, cmd, argp);
2015         else
2016                 err = -ENOTTY;
2017
2018         if (err == -ENOTTY)
2019                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2020
2021         return err;
2022 }
2023
2024 static int idefloppy_media_changed(struct gendisk *disk)
2025 {
2026         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2027         ide_drive_t *drive = floppy->drive;
2028
2029         /* do not scan partitions twice if this is a removable device */
2030         if (drive->attach) {
2031                 drive->attach = 0;
2032                 return 0;
2033         }
2034         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2035 }
2036
2037 static int idefloppy_revalidate_disk(struct gendisk *disk)
2038 {
2039         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2040         set_capacity(disk, idefloppy_capacity(floppy->drive));
2041         return 0;
2042 }
2043
2044 static struct block_device_operations idefloppy_ops = {
2045         .owner          = THIS_MODULE,
2046         .open           = idefloppy_open,
2047         .release        = idefloppy_release,
2048         .ioctl          = idefloppy_ioctl,
2049         .getgeo         = idefloppy_getgeo,
2050         .media_changed  = idefloppy_media_changed,
2051         .revalidate_disk= idefloppy_revalidate_disk
2052 };
2053
2054 static int ide_floppy_probe(ide_drive_t *drive)
2055 {
2056         idefloppy_floppy_t *floppy;
2057         struct gendisk *g;
2058
2059         if (!strstr("ide-floppy", drive->driver_req))
2060                 goto failed;
2061         if (!drive->present)
2062                 goto failed;
2063         if (drive->media != ide_floppy)
2064                 goto failed;
2065         if (!idefloppy_identify_device (drive, drive->id)) {
2066                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2067                 goto failed;
2068         }
2069         if (drive->scsi) {
2070                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2071                 goto failed;
2072         }
2073         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2074                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2075                 goto failed;
2076         }
2077
2078         g = alloc_disk(1 << PARTN_BITS);
2079         if (!g)
2080                 goto out_free_floppy;
2081
2082         ide_init_disk(g, drive);
2083
2084         ide_proc_register_driver(drive, &idefloppy_driver);
2085
2086         kref_init(&floppy->kref);
2087
2088         floppy->drive = drive;
2089         floppy->driver = &idefloppy_driver;
2090         floppy->disk = g;
2091
2092         g->private_data = &floppy->driver;
2093
2094         drive->driver_data = floppy;
2095
2096         idefloppy_setup (drive, floppy);
2097
2098         g->minors = 1 << PARTN_BITS;
2099         g->driverfs_dev = &drive->gendev;
2100         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2101         g->fops = &idefloppy_ops;
2102         drive->attach = 1;
2103         add_disk(g);
2104         return 0;
2105
2106 out_free_floppy:
2107         kfree(floppy);
2108 failed:
2109         return -ENODEV;
2110 }
2111
2112 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2113
2114 static void __exit idefloppy_exit (void)
2115 {
2116         driver_unregister(&idefloppy_driver.gen_driver);
2117 }
2118
2119 static int __init idefloppy_init(void)
2120 {
2121         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2122         return driver_register(&idefloppy_driver.gen_driver);
2123 }
2124
2125 MODULE_ALIAS("ide:*m-floppy*");
2126 module_init(idefloppy_init);
2127 module_exit(idefloppy_exit);
2128 MODULE_LICENSE("GPL");