drivers/ide/ide-floppy.c

   1 /*
   2  * linux/drivers/ide/ide-floppy.c       Version 0.99    Feb 24 2002
   3  *
   4  * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
   6  */
   7
   8 /*
   9  * IDE ATAPI floppy driver.
  10  *
  11  * The driver currently doesn't have any fancy features, just the bare
  12  * minimum read/write support.
  13  *
  14  * This driver supports the following IDE floppy drives:
  15  *
  16  * LS-120/240 SuperDisk
  17  * Iomega Zip 100/250
  18  * Iomega PC Card Clik!/PocketZip
  19  *
  20  * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
  21  * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
  22  *
  23  * Ver 0.1   Oct 17 96   Initial test version, mostly based on ide-tape.c.
  24  * Ver 0.2   Oct 31 96   Minor changes.
  25  * Ver 0.3   Dec  2 96   Fixed error recovery bug.
  26  * Ver 0.4   Jan 26 97   Add support for the HDIO_GETGEO ioctl.
  27  * Ver 0.5   Feb 21 97   Add partitions support.
  28  *                       Use the minimum of the LBA and CHS capacities.
  29  *                       Avoid hwgroup->rq == NULL on the last irq.
  30  *                       Fix potential null dereferencing with DEBUG_LOG.
  31  * Ver 0.8   Dec  7 97   Increase irq timeout from 10 to 50 seconds.
  32  *                       Add media write-protect detection.
  33  *                       Issue START command only if TEST UNIT READY fails.
  34  *                       Add work-around for IOMEGA ZIP revision 21.D.
  35  *                       Remove idefloppy_get_capabilities().
  36  * Ver 0.9   Jul  4 99   Fix a bug which might have caused the number of
  37  *                        bytes requested on each interrupt to be zero.
  38  *                        Thanks to <shanos@es.co.nz> for pointing this out.
  39  * Ver 0.9.sv Jan 6 01   Sam Varshavchik <mrsam@courier-mta.com>
  40  *                       Implement low level formatting.  Reimplemented
  41  *                       IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
  42  *                       bit.  My LS-120 drive barfs on
  43  *                       IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
  44  *                       Compromise by not reporting a failure to get this
  45  *                       mode page.  Implemented four IOCTLs in order to
  46  *                       implement formatting.  IOCTls begin with 0x4600,
  47  *                       0x46 is 'F' as in Format.
  48  *            Jan 9 01   Userland option to select format verify.
  49  *                       Added PC_SUPPRESS_ERROR flag - some idefloppy drives
  50  *                       do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
  51  *                       return a sense error.  Suppress error reporting in
  52  *                       this particular case in order to avoid spurious
  53  *                       errors in syslog.  The culprit is
  54  *                       idefloppy_get_capability_page(), so move it to
  55  *                       idefloppy_begin_format() so that it's not used
  56  *                       unless absolutely necessary.
  57  *                       If drive does not support format progress indication
  58  *                       monitor the dsc bit in the status register.
  59  *                       Also, O_NDELAY on open will allow the device to be
  60  *                       opened without a disk available.  This can be used to
  61  *                       open an unformatted disk, or get the device capacity.
  62  * Ver 0.91  Dec 11 99   Added IOMEGA Clik! drive support by
  63  *                 <paul@paulbristow.net>
  64  * Ver 0.92  Oct 22 00   Paul Bristow became official maintainer for this
  65  *                         driver.  Included Powerbook internal zip kludge.
  66  * Ver 0.93  Oct 24 00   Fixed bugs for Clik! drive
  67  *                        no disk on insert and disk change now works
  68  * Ver 0.94  Oct 27 00   Tidied up to remove strstr(Clik) everywhere
  69  * Ver 0.95  Nov  7 00   Brought across to kernel 2.4
  70  * Ver 0.96  Jan  7 01   Actually in line with release version of 2.4.0
  71  *                       including set_bit patch from Rusty Russell
  72  * Ver 0.97  Jul 22 01   Merge 0.91-0.96 onto 0.9.sv for ac series
  73  * Ver 0.97.sv Aug 3 01  Backported from 2.4.7-ac3
  74  * Ver 0.98  Oct 26 01   Split idefloppy_transfer_pc into two pieces to
  75  *                        fix a lost interrupt problem. It appears the busy
  76  *                        bit was being deasserted by my IOMEGA ATAPI ZIP 100
  77  *                        drive before the drive was actually ready.
  78  * Ver 0.98a Oct 29 01   Expose delay value so we can play.
  79  * Ver 0.99  Feb 24 02   Remove duplicate code, modify clik! detection code
  80  *                        to support new PocketZip drives
  81  */
  82
  83 #define IDEFLOPPY_VERSION "0.99.newide"
  84
  85 #include <linux/module.h>
  86 #include <linux/types.h>
  87 #include <linux/string.h>
  88 #include <linux/kernel.h>
  89 #include <linux/delay.h>
  90 #include <linux/timer.h>
  91 #include <linux/mm.h>
  92 #include <linux/interrupt.h>
  93 #include <linux/major.h>
  94 #include <linux/errno.h>
  95 #include <linux/genhd.h>
  96 #include <linux/slab.h>
  97 #include <linux/cdrom.h>
  98 #include <linux/ide.h>
  99 #include <linux/bitops.h>
 100 #include <linux/mutex.h>
 101
 102 #include <asm/byteorder.h>
 103 #include <asm/irq.h>
 104 #include <asm/uaccess.h>
 105 #include <asm/io.h>
 106 #include <asm/unaligned.h>
 107
 108 /*
 109  *      The following are used to debug the driver.
 110  */
 111 #define IDEFLOPPY_DEBUG_LOG             0
 112 #define IDEFLOPPY_DEBUG_INFO            0
 113 #define IDEFLOPPY_DEBUG_BUGS            1
 114
 115 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
 116 #define IDEFLOPPY_DEBUG( fmt, args... )
 117
 118 #if IDEFLOPPY_DEBUG_LOG
 119 #define debug_log printk
 120 #else
 121 #define debug_log(fmt, args... ) do {} while(0)
 122 #endif
 123
 124
 125 /*
 126  *      Some drives require a longer irq timeout.
 127  */
 128 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
 129
 130 /*
 131  *      After each failed packet command we issue a request sense command
 132  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
 133  */
 134 #define IDEFLOPPY_MAX_PC_RETRIES        3
 135
 136 /*
 137  *      With each packet command, we allocate a buffer of
 138  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
 139  */
 140 #define IDEFLOPPY_PC_BUFFER_SIZE        256
 141
 142 /*
 143  *      In various places in the driver, we need to allocate storage
 144  *      for packet commands and requests, which will remain valid while
 145  *      we leave the driver to wait for an interrupt or a timeout event.
 146  */
 147 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
 148
 149 /*
 150  *      Our view of a packet command.
 151  */
 152 typedef struct idefloppy_packet_command_s {
 153         u8 c[12];                               /* Actual packet bytes */
 154         int retries;                            /* On each retry, we increment retries */
 155         int error;                              /* Error code */
 156         int request_transfer;                   /* Bytes to transfer */
 157         int actually_transferred;               /* Bytes actually transferred */
 158         int buffer_size;                        /* Size of our data buffer */
 159         int b_count;                            /* Missing/Available data on the current buffer */
 160         struct request *rq;                     /* The corresponding request */
 161         u8 *buffer;                             /* Data buffer */
 162         u8 *current_position;                   /* Pointer into the above buffer */
 163         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 164         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 165         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 166 } idefloppy_pc_t;
 167
 168 /*
 169  *      Packet command flag bits.
 170  */
 171 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 172 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 173 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 174 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 175 #define PC_WRITING                      5       /* Data direction */
 176
 177 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 178
 179 /*
 180  *      Removable Block Access Capabilities Page
 181  */
 182 typedef struct {
 183 #if defined(__LITTLE_ENDIAN_BITFIELD)
 184         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 185         unsigned        reserved1_6     :1;     /* Reserved */
 186         unsigned        ps              :1;     /* Should be 0 */
 187 #elif defined(__BIG_ENDIAN_BITFIELD)
 188         unsigned        ps              :1;     /* Should be 0 */
 189         unsigned        reserved1_6     :1;     /* Reserved */
 190         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
 191 #else
 192 #error "Bitfield endianness not defined! Check your byteorder.h"
 193 #endif
 194         u8              page_length;            /* Page Length - Should be 0xa */
 195 #if defined(__LITTLE_ENDIAN_BITFIELD)
 196         unsigned        reserved2       :6;
 197         unsigned        srfp            :1;     /* Supports reporting progress of format */
 198         unsigned        sflp            :1;     /* System floppy type device */
 199         unsigned        tlun            :3;     /* Total logical units supported by the device */
 200         unsigned        reserved3       :3;
 201         unsigned        sml             :1;     /* Single / Multiple lun supported */
 202         unsigned        ncd             :1;     /* Non cd optical device */
 203 #elif defined(__BIG_ENDIAN_BITFIELD)
 204         unsigned        sflp            :1;     /* System floppy type device */
 205         unsigned        srfp            :1;     /* Supports reporting progress of format */
 206         unsigned        reserved2       :6;
 207         unsigned        ncd             :1;     /* Non cd optical device */
 208         unsigned        sml             :1;     /* Single / Multiple lun supported */
 209         unsigned        reserved3       :3;
 210         unsigned        tlun            :3;     /* Total logical units supported by the device */
 211 #else
 212 #error "Bitfield endianness not defined! Check your byteorder.h"
 213 #endif
 214         u8              reserved[8];
 215 } idefloppy_capabilities_page_t;
 216
 217 /*
 218  *      Flexible disk page.
 219  */
 220 typedef struct {
 221 #if defined(__LITTLE_ENDIAN_BITFIELD)
 222         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 223         unsigned        reserved1_6     :1;     /* Reserved */
 224         unsigned        ps              :1;     /* The device is capable of saving the page */
 225 #elif defined(__BIG_ENDIAN_BITFIELD)
 226         unsigned        ps              :1;     /* The device is capable of saving the page */
 227         unsigned        reserved1_6     :1;     /* Reserved */
 228         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
 229 #else
 230 #error "Bitfield endianness not defined! Check your byteorder.h"
 231 #endif
 232         u8              page_length;            /* Page Length - Should be 0x1e */
 233         u16             transfer_rate;          /* In kilobits per second */
 234         u8              heads, sectors;         /* Number of heads, Number of sectors per track */
 235         u16             sector_size;            /* Byes per sector */
 236         u16             cyls;                   /* Number of cylinders */
 237         u8              reserved10[10];
 238         u8              motor_delay;            /* Motor off delay */
 239         u8              reserved21[7];
 240         u16             rpm;                    /* Rotations per minute */
 241         u8              reserved30[2];
 242 } idefloppy_flexible_disk_page_t;
 243
 244 /*
 245  *      Format capacity
 246  */
 247 typedef struct {
 248         u8              reserved[3];
 249         u8              length;                 /* Length of the following descriptors in bytes */
 250 } idefloppy_capacity_header_t;
 251
 252 typedef struct {
 253         u32             blocks;                 /* Number of blocks */
 254 #if defined(__LITTLE_ENDIAN_BITFIELD)
 255         unsigned        dc              :2;     /* Descriptor Code */
 256         unsigned        reserved        :6;
 257 #elif defined(__BIG_ENDIAN_BITFIELD)
 258         unsigned        reserved        :6;
 259         unsigned        dc              :2;     /* Descriptor Code */
 260 #else
 261 #error "Bitfield endianness not defined! Check your byteorder.h"
 262 #endif
 263         u8              length_msb;             /* Block Length (MSB)*/
 264         u16             length;                 /* Block Length */
 265 } idefloppy_capacity_descriptor_t;
 266
 267 #define CAPACITY_INVALID        0x00
 268 #define CAPACITY_UNFORMATTED    0x01
 269 #define CAPACITY_CURRENT        0x02
 270 #define CAPACITY_NO_CARTRIDGE   0x03
 271
 272 /*
 273  *      Most of our global data which we need to save even as we leave the
 274  *      driver due to an interrupt or a timer event is stored in a variable
 275  *      of type idefloppy_floppy_t, defined below.
 276  */
 277 typedef struct ide_floppy_obj {
 278         ide_drive_t     *drive;
 279         ide_driver_t    *driver;
 280         struct gendisk  *disk;
 281         struct kref     kref;
 282
 283         /* Current packet command */
 284         idefloppy_pc_t *pc;
 285         /* Last failed packet command */
 286         idefloppy_pc_t *failed_pc;
 287         /* Packet command stack */
 288         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 289         /* Next free packet command storage space */
 290         int pc_stack_index;
 291         struct request rq_stack[IDEFLOPPY_PC_STACK];
 292         /* We implement a circular array */
 293         int rq_stack_index;
 294
 295         /*
 296          *      Last error information
 297          */
 298         u8 sense_key, asc, ascq;
 299         /* delay this long before sending packet command */
 300         u8 ticks;
 301         int progress_indication;
 302
 303         /*
 304          *      Device information
 305          */
 306         /* Current format */
 307         int blocks, block_size, bs_factor;
 308         /* Last format capacity */
 309         idefloppy_capacity_descriptor_t capacity;
 310         /* Copy of the flexible disk page */
 311         idefloppy_flexible_disk_page_t flexible_disk_page;
 312         /* Write protect */
 313         int wp;
 314         /* Supports format progress report */
 315         int srfp;
 316         /* Status/Action flags */
 317         unsigned long flags;
 318 } idefloppy_floppy_t;
 319
 320 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 321
 322 /*
 323  *      Floppy flag bits values.
 324  */
 325 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 326 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 327 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 328 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 329 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 330 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 331
 332 /*
 333  *      ATAPI floppy drive packet commands
 334  */
 335 #define IDEFLOPPY_FORMAT_UNIT_CMD       0x04
 336 #define IDEFLOPPY_INQUIRY_CMD           0x12
 337 #define IDEFLOPPY_MODE_SELECT_CMD       0x55
 338 #define IDEFLOPPY_MODE_SENSE_CMD        0x5a
 339 #define IDEFLOPPY_READ10_CMD            0x28
 340 #define IDEFLOPPY_READ12_CMD            0xa8
 341 #define IDEFLOPPY_READ_CAPACITY_CMD     0x23
 342 #define IDEFLOPPY_REQUEST_SENSE_CMD     0x03
 343 #define IDEFLOPPY_PREVENT_REMOVAL_CMD   0x1e
 344 #define IDEFLOPPY_SEEK_CMD              0x2b
 345 #define IDEFLOPPY_START_STOP_CMD        0x1b
 346 #define IDEFLOPPY_TEST_UNIT_READY_CMD   0x00
 347 #define IDEFLOPPY_VERIFY_CMD            0x2f
 348 #define IDEFLOPPY_WRITE10_CMD           0x2a
 349 #define IDEFLOPPY_WRITE12_CMD           0xaa
 350 #define IDEFLOPPY_WRITE_VERIFY_CMD      0x2e
 351
 352 /*
 353  *      Defines for the mode sense command
 354  */
 355 #define MODE_SENSE_CURRENT              0x00
 356 #define MODE_SENSE_CHANGEABLE           0x01
 357 #define MODE_SENSE_DEFAULT              0x02
 358 #define MODE_SENSE_SAVED                0x03
 359
 360 /*
 361  *      IOCTLs used in low-level formatting.
 362  */
 363
 364 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 365 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 366 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 367 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 368
 369 #if 0
 370 /*
 371  *      Special requests for our block device strategy routine.
 372  */
 373 #define IDEFLOPPY_FIRST_RQ      90
 374
 375 /*
 376  *      IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
 377  */
 378 #define IDEFLOPPY_PC_RQ         90
 379
 380 #define IDEFLOPPY_LAST_RQ       90
 381
 382 /*
 383  *      A macro which can be used to check if a given request command
 384  *      originated in the driver or in the buffer cache layer.
 385  */
 386 #define IDEFLOPPY_RQ_CMD(cmd)   ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
 387
 388 #endif
 389
 390 /*
 391  *      Error codes which are returned in rq->errors to the higher part
 392  *      of the driver.
 393  */
 394 #define IDEFLOPPY_ERROR_GENERAL         101
 395
 396 /*
 397  *      The following is used to format the general configuration word of
 398  *      the ATAPI IDENTIFY DEVICE command.
 399  */
 400 struct idefloppy_id_gcw {
 401 #if defined(__LITTLE_ENDIAN_BITFIELD)
 402         unsigned packet_size            :2;     /* Packet Size */
 403         unsigned reserved234            :3;     /* Reserved */
 404         unsigned drq_type               :2;     /* Command packet DRQ type */
 405         unsigned removable              :1;     /* Removable media */
 406         unsigned device_type            :5;     /* Device type */
 407         unsigned reserved13             :1;     /* Reserved */
 408         unsigned protocol               :2;     /* Protocol type */
 409 #elif defined(__BIG_ENDIAN_BITFIELD)
 410         unsigned protocol               :2;     /* Protocol type */
 411         unsigned reserved13             :1;     /* Reserved */
 412         unsigned device_type            :5;     /* Device type */
 413         unsigned removable              :1;     /* Removable media */
 414         unsigned drq_type               :2;     /* Command packet DRQ type */
 415         unsigned reserved234            :3;     /* Reserved */
 416         unsigned packet_size            :2;     /* Packet Size */
 417 #else
 418 #error "Bitfield endianness not defined! Check your byteorder.h"
 419 #endif
 420 };
 421
 422 /*
 423  *      INQUIRY packet command - Data Format
 424  */
 425 typedef struct {
 426 #if defined(__LITTLE_ENDIAN_BITFIELD)
 427         unsigned        device_type     :5;     /* Peripheral Device Type */
 428         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 429         unsigned        reserved1_6t0   :7;     /* Reserved */
 430         unsigned        rmb             :1;     /* Removable Medium Bit */
 431         unsigned        ansi_version    :3;     /* ANSI Version */
 432         unsigned        ecma_version    :3;     /* ECMA Version */
 433         unsigned        iso_version     :2;     /* ISO Version */
 434         unsigned        response_format :4;     /* Response Data Format */
 435         unsigned        reserved3_45    :2;     /* Reserved */
 436         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 437         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 438 #elif defined(__BIG_ENDIAN_BITFIELD)
 439         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
 440         unsigned        device_type     :5;     /* Peripheral Device Type */
 441         unsigned        rmb             :1;     /* Removable Medium Bit */
 442         unsigned        reserved1_6t0   :7;     /* Reserved */
 443         unsigned        iso_version     :2;     /* ISO Version */
 444         unsigned        ecma_version    :3;     /* ECMA Version */
 445         unsigned        ansi_version    :3;     /* ANSI Version */
 446         unsigned        reserved3_7     :1;     /* AENC - Reserved */
 447         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
 448         unsigned        reserved3_45    :2;     /* Reserved */
 449         unsigned        response_format :4;     /* Response Data Format */
 450 #else
 451 #error "Bitfield endianness not defined! Check your byteorder.h"
 452 #endif
 453         u8              additional_length;      /* Additional Length (total_length-4) */
 454         u8              rsv5, rsv6, rsv7;       /* Reserved */
 455         u8              vendor_id[8];           /* Vendor Identification */
 456         u8              product_id[16];         /* Product Identification */
 457         u8              revision_level[4];      /* Revision Level */
 458         u8              vendor_specific[20];    /* Vendor Specific - Optional */
 459         u8              reserved56t95[40];      /* Reserved - Optional */
 460                                                 /* Additional information may be returned */
 461 } idefloppy_inquiry_result_t;
 462
 463 /*
 464  *      REQUEST SENSE packet command result - Data Format.
 465  */
 466 typedef struct {
 467 #if defined(__LITTLE_ENDIAN_BITFIELD)
 468         unsigned        error_code      :7;     /* Current error (0x70) */
 469         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 470         u8              reserved1       :8;     /* Reserved */
 471         unsigned        sense_key       :4;     /* Sense Key */
 472         unsigned        reserved2_4     :1;     /* Reserved */
 473         unsigned        ili             :1;     /* Incorrect Length Indicator */
 474         unsigned        reserved2_67    :2;
 475 #elif defined(__BIG_ENDIAN_BITFIELD)
 476         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
 477         unsigned        error_code      :7;     /* Current error (0x70) */
 478         u8              reserved1       :8;     /* Reserved */
 479         unsigned        reserved2_67    :2;
 480         unsigned        ili             :1;     /* Incorrect Length Indicator */
 481         unsigned        reserved2_4     :1;     /* Reserved */
 482         unsigned        sense_key       :4;     /* Sense Key */
 483 #else
 484 #error "Bitfield endianness not defined! Check your byteorder.h"
 485 #endif
 486         u32             information __attribute__ ((packed));
 487         u8              asl;                    /* Additional sense length (n-7) */
 488         u32             command_specific;       /* Additional command specific information */
 489         u8              asc;                    /* Additional Sense Code */
 490         u8              ascq;                   /* Additional Sense Code Qualifier */
 491         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
 492         u8              sksv[3];
 493         u8              pad[2];                 /* Padding to 20 bytes */
 494 } idefloppy_request_sense_result_t;
 495
 496 /*
 497  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
 498  */
 499 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 500 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 501
 502 /*
 503  *      Mode Parameter Header for the MODE SENSE packet command
 504  */
 505 typedef struct {
 506         u16             mode_data_length;       /* Length of the following data transfer */
 507         u8              medium_type;            /* Medium Type */
 508 #if defined(__LITTLE_ENDIAN_BITFIELD)
 509         unsigned        reserved3       :7;
 510         unsigned        wp              :1;     /* Write protect */
 511 #elif defined(__BIG_ENDIAN_BITFIELD)
 512         unsigned        wp              :1;     /* Write protect */
 513         unsigned        reserved3       :7;
 514 #else
 515 #error "Bitfield endianness not defined! Check your byteorder.h"
 516 #endif
 517         u8              reserved[4];
 518 } idefloppy_mode_parameter_header_t;
 519
 520 static DEFINE_MUTEX(idefloppy_ref_mutex);
 521
 522 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 523
 524 #define ide_floppy_g(disk) \
 525         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 526
 527 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 528 {
 529         struct ide_floppy_obj *floppy = NULL;
 530
 531         mutex_lock(&idefloppy_ref_mutex);
 532         floppy = ide_floppy_g(disk);
 533         if (floppy)
 534                 kref_get(&floppy->kref);
 535         mutex_unlock(&idefloppy_ref_mutex);
 536         return floppy;
 537 }
 538
 539 static void ide_floppy_release(struct kref *);
 540
 541 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 542 {
 543         mutex_lock(&idefloppy_ref_mutex);
 544         kref_put(&floppy->kref, ide_floppy_release);
 545         mutex_unlock(&idefloppy_ref_mutex);
 546 }
 547
 548 /*
 549  *      Too bad. The drive wants to send us data which we are not ready to accept.
 550  *      Just throw it away.
 551  */
 552 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 553 {
 554         while (bcount--)
 555                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 556 }
 557
 558 #if IDEFLOPPY_DEBUG_BUGS
 559 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 560 {
 561         while (bcount--)
 562                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 563 }
 564 #endif /* IDEFLOPPY_DEBUG_BUGS */
 565
 566
 567 /*
 568  *      idefloppy_do_end_request is used to finish servicing a request.
 569  *
 570  *      For read/write requests, we will call ide_end_request to pass to the
 571  *      next buffer.
 572  */
 573 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 574 {
 575         idefloppy_floppy_t *floppy = drive->driver_data;
 576         struct request *rq = HWGROUP(drive)->rq;
 577         int error;
 578
 579         debug_log(KERN_INFO "Reached idefloppy_end_request\n");
 580
 581         switch (uptodate) {
 582                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 583                 case 1: error = 0; break;
 584                 default: error = uptodate;
 585         }
 586         if (error)
 587                 floppy->failed_pc = NULL;
 588         /* Why does this happen? */
 589         if (!rq)
 590                 return 0;
 591         if (!blk_special_request(rq)) {
 592                 /* our real local end request function */
 593                 ide_end_request(drive, uptodate, nsecs);
 594                 return 0;
 595         }
 596         rq->errors = error;
 597         /* fixme: need to move this local also */
 598         ide_end_drive_cmd(drive, 0, 0);
 599         return 0;
 600 }
 601
 602 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 603 {
 604         struct request *rq = pc->rq;
 605         struct bio_vec *bvec;
 606         struct bio *bio;
 607         unsigned long flags;
 608         char *data;
 609         int count, i, done = 0;
 610
 611         rq_for_each_bio(bio, rq) {
 612                 bio_for_each_segment(bvec, bio, i) {
 613                         if (!bcount)
 614                                 break;
 615
 616                         count = min(bvec->bv_len, bcount);
 617
 618                         data = bvec_kmap_irq(bvec, &flags);
 619                         drive->hwif->atapi_input_bytes(drive, data, count);
 620                         bvec_kunmap_irq(data, &flags);
 621
 622                         bcount -= count;
 623                         pc->b_count += count;
 624                         done += count;
 625                 }
 626         }
 627
 628         idefloppy_do_end_request(drive, 1, done >> 9);
 629
 630         if (bcount) {
 631                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 632                 idefloppy_discard_data(drive, bcount);
 633         }
 634 }
 635
 636 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 637 {
 638         struct request *rq = pc->rq;
 639         struct bio *bio;
 640         struct bio_vec *bvec;
 641         unsigned long flags;
 642         int count, i, done = 0;
 643         char *data;
 644
 645         rq_for_each_bio(bio, rq) {
 646                 bio_for_each_segment(bvec, bio, i) {
 647                         if (!bcount)
 648                                 break;
 649
 650                         count = min(bvec->bv_len, bcount);
 651
 652                         data = bvec_kmap_irq(bvec, &flags);
 653                         drive->hwif->atapi_output_bytes(drive, data, count);
 654                         bvec_kunmap_irq(data, &flags);
 655
 656                         bcount -= count;
 657                         pc->b_count += count;
 658                         done += count;
 659                 }
 660         }
 661
 662         idefloppy_do_end_request(drive, 1, done >> 9);
 663
 664 #if IDEFLOPPY_DEBUG_BUGS
 665         if (bcount) {
 666                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 667                 idefloppy_write_zeros(drive, bcount);
 668         }
 669 #endif
 670 }
 671
 672 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 673 {
 674         struct request *rq = pc->rq;
 675         struct bio *bio = rq->bio;
 676
 677         while ((bio = rq->bio) != NULL)
 678                 idefloppy_do_end_request(drive, 1, 0);
 679 }
 680
 681 /*
 682  *      idefloppy_queue_pc_head generates a new packet command request in front
 683  *      of the request queue, before the current request, so that it will be
 684  *      processed immediately, on the next pass through the driver.
 685  */
 686 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 687 {
 688         struct ide_floppy_obj *floppy = drive->driver_data;
 689
 690         ide_init_drive_cmd(rq);
 691         rq->buffer = (char *) pc;
 692         rq->cmd_type = REQ_TYPE_SPECIAL;
 693         rq->rq_disk = floppy->disk;
 694         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 695 }
 696
 697 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 698 {
 699         idefloppy_floppy_t *floppy = drive->driver_data;
 700
 701         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 702                 floppy->pc_stack_index=0;
 703         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 704 }
 705
 706 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 707 {
 708         idefloppy_floppy_t *floppy = drive->driver_data;
 709
 710         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 711                 floppy->rq_stack_index = 0;
 712         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 713 }
 714
 715 /*
 716  *      idefloppy_analyze_error is called on each failed packet command retry
 717  *      to analyze the request sense.
 718  */
 719 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
 720 {
 721         idefloppy_floppy_t *floppy = drive->driver_data;
 722
 723         floppy->sense_key = result->sense_key;
 724         floppy->asc = result->asc;
 725         floppy->ascq = result->ascq;
 726         floppy->progress_indication = result->sksv[0] & 0x80 ?
 727                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
 728         if (floppy->failed_pc)
 729                 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
 730                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
 731                         result->sense_key, result->asc, result->ascq);
 732         else
 733                 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
 734                         "ascq = %x\n", result->sense_key,
 735                         result->asc, result->ascq);
 736 }
 737
 738 static void idefloppy_request_sense_callback (ide_drive_t *drive)
 739 {
 740         idefloppy_floppy_t *floppy = drive->driver_data;
 741
 742         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 743
 744         if (!floppy->pc->error) {
 745                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
 746                 idefloppy_do_end_request(drive, 1, 0);
 747         } else {
 748                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
 749                 idefloppy_do_end_request(drive, 0, 0);
 750         }
 751 }
 752
 753 /*
 754  *      General packet command callback function.
 755  */
 756 static void idefloppy_pc_callback (ide_drive_t *drive)
 757 {
 758         idefloppy_floppy_t *floppy = drive->driver_data;
 759
 760         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
 761
 762         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 763 }
 764
 765 /*
 766  *      idefloppy_init_pc initializes a packet command.
 767  */
 768 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 769 {
 770         memset(pc->c, 0, 12);
 771         pc->retries = 0;
 772         pc->flags = 0;
 773         pc->request_transfer = 0;
 774         pc->buffer = pc->pc_buffer;
 775         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 776         pc->callback = &idefloppy_pc_callback;
 777 }
 778
 779 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 780 {
 781         idefloppy_init_pc(pc);
 782         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
 783         pc->c[4] = 255;
 784         pc->request_transfer = 18;
 785         pc->callback = &idefloppy_request_sense_callback;
 786 }
 787
 788 /*
 789  *      idefloppy_retry_pc is called when an error was detected during the
 790  *      last packet command. We queue a request sense packet command in
 791  *      the head of the request list.
 792  */
 793 static void idefloppy_retry_pc (ide_drive_t *drive)
 794 {
 795         idefloppy_pc_t *pc;
 796         struct request *rq;
 797         atapi_error_t error;
 798
 799         error.all = HWIF(drive)->INB(IDE_ERROR_REG);
 800         pc = idefloppy_next_pc_storage(drive);
 801         rq = idefloppy_next_rq_storage(drive);
 802         idefloppy_create_request_sense_cmd(pc);
 803         idefloppy_queue_pc_head(drive, pc, rq);
 804 }
 805
 806 /*
 807  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 808  *      during a packet command.
 809  */
 810 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 811 {
 812         idefloppy_floppy_t *floppy = drive->driver_data;
 813         atapi_status_t status;
 814         atapi_bcount_t bcount;
 815         atapi_ireason_t ireason;
 816         idefloppy_pc_t *pc = floppy->pc;
 817         struct request *rq = pc->rq;
 818         unsigned int temp;
 819
 820         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
 821                 __FUNCTION__);
 822
 823         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 824                 if (HWIF(drive)->ide_dma_end(drive)) {
 825                         set_bit(PC_DMA_ERROR, &pc->flags);
 826                 } else {
 827                         pc->actually_transferred = pc->request_transfer;
 828                         idefloppy_update_buffers(drive, pc);
 829                 }
 830                 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
 831         }
 832
 833         /* Clear the interrupt */
 834         status.all = HWIF(drive)->INB(IDE_STATUS_REG);
 835
 836         if (!status.b.drq) {                    /* No more interrupts */
 837                 debug_log(KERN_INFO "Packet command completed, %d bytes "
 838                         "transferred\n", pc->actually_transferred);
 839                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 840
 841                 local_irq_enable_in_hardirq();
 842
 843                 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
 844                         /* Error detected */
 845                         debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
 846                                 drive->name);
 847                         rq->errors++;
 848                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
 849                                 printk(KERN_ERR "ide-floppy: I/O error in "
 850                                         "request sense command\n");
 851                                 return ide_do_reset(drive);
 852                         }
 853                         /* Retry operation */
 854                         idefloppy_retry_pc(drive);
 855                         /* queued, but not started */
 856                         return ide_stopped;
 857                 }
 858                 pc->error = 0;
 859                 if (floppy->failed_pc == pc)
 860                         floppy->failed_pc = NULL;
 861                 /* Command finished - Call the callback function */
 862                 pc->callback(drive);
 863                 return ide_stopped;
 864         }
 865
 866         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 867                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 868                         "more interrupts in DMA mode\n");
 869                 (void)__ide_dma_off(drive);
 870                 return ide_do_reset(drive);
 871         }
 872
 873         /* Get the number of bytes to transfer */
 874         bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
 875         bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
 876         /* on this interrupt */
 877         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 878
 879         if (ireason.b.cod) {
 880                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 881                 return ide_do_reset(drive);
 882         }
 883         if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
 884                 /* Hopefully, we will never get here */
 885                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 886                         ireason.b.io ? "Write":"Read");
 887                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 888                         ireason.b.io ? "Read":"Write");
 889                 return ide_do_reset(drive);
 890         }
 891         if (!test_bit(PC_WRITING, &pc->flags)) {
 892                 /* Reading - Check that we have enough space */
 893                 temp = pc->actually_transferred + bcount.all;
 894                 if (temp > pc->request_transfer) {
 895                         if (temp > pc->buffer_size) {
 896                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 897                                         "to send us more data than expected "
 898                                         "- discarding data\n");
 899                                 idefloppy_discard_data(drive,bcount.all);
 900                                 BUG_ON(HWGROUP(drive)->handler != NULL);
 901                                 ide_set_handler(drive,
 902                                                 &idefloppy_pc_intr,
 903                                                 IDEFLOPPY_WAIT_CMD,
 904                                                 NULL);
 905                                 return ide_started;
 906                         }
 907                         debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
 908                                 "send us more data than expected - "
 909                                 "allowing transfer\n");
 910                 }
 911         }
 912         if (test_bit(PC_WRITING, &pc->flags)) {
 913                 if (pc->buffer != NULL)
 914                         /* Write the current buffer */
 915                         HWIF(drive)->atapi_output_bytes(drive,
 916                                                 pc->current_position,
 917                                                 bcount.all);
 918                 else
 919                         idefloppy_output_buffers(drive, pc, bcount.all);
 920         } else {
 921                 if (pc->buffer != NULL)
 922                         /* Read the current buffer */
 923                         HWIF(drive)->atapi_input_bytes(drive,
 924                                                 pc->current_position,
 925                                                 bcount.all);
 926                 else
 927                         idefloppy_input_buffers(drive, pc, bcount.all);
 928         }
 929         /* Update the current position */
 930         pc->actually_transferred += bcount.all;
 931         pc->current_position += bcount.all;
 932
 933         BUG_ON(HWGROUP(drive)->handler != NULL);
 934         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 935         return ide_started;
 936 }
 937
 938 /*
 939  * This is the original routine that did the packet transfer.
 940  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 941  * for that drive below. The algorithm is chosen based on drive type
 942  */
 943 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 944 {
 945         ide_startstop_t startstop;
 946         idefloppy_floppy_t *floppy = drive->driver_data;
 947         atapi_ireason_t ireason;
 948
 949         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 950                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 951                                 "initiated yet DRQ isn't asserted\n");
 952                 return startstop;
 953         }
 954         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 955         if (!ireason.b.cod || ireason.b.io) {
 956                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 957                                 "issuing a packet command\n");
 958                 return ide_do_reset(drive);
 959         }
 960         BUG_ON(HWGROUP(drive)->handler != NULL);
 961         /* Set the interrupt routine */
 962         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 963         /* Send the actual packet */
 964         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 965         return ide_started;
 966 }
 967
 968
 969 /*
 970  * What we have here is a classic case of a top half / bottom half
 971  * interrupt service routine. In interrupt mode, the device sends
 972  * an interrupt to signal it's ready to receive a packet. However,
 973  * we need to delay about 2-3 ticks before issuing the packet or we
 974  * gets in trouble.
 975  *
 976  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 977  * directly). In either case, when the device says it's ready for a
 978  * packet, we schedule the packet transfer to occur about 2-3 ticks
 979  * later in transfer_pc2.
 980  */
 981 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 982 {
 983         idefloppy_floppy_t *floppy = drive->driver_data;
 984
 985         /* Send the actual packet */
 986         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 987         /* Timeout for the packet command */
 988         return IDEFLOPPY_WAIT_CMD;
 989 }
 990
 991 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 992 {
 993         idefloppy_floppy_t *floppy = drive->driver_data;
 994         ide_startstop_t startstop;
 995         atapi_ireason_t ireason;
 996
 997         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 998                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 999                                 "initiated yet DRQ isn't asserted\n");
1000                 return startstop;
1001         }
1002         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1003         if (!ireason.b.cod || ireason.b.io) {
1004                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1005                                 "while issuing a packet command\n");
1006                 return ide_do_reset(drive);
1007         }
1008         /*
1009          * The following delay solves a problem with ATAPI Zip 100 drives
1010          * where the Busy flag was apparently being deasserted before the
1011          * unit was ready to receive data. This was happening on a
1012          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1013          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1014          * used until after the packet is moved in about 50 msec.
1015          */
1016         BUG_ON(HWGROUP(drive)->handler != NULL);
1017         ide_set_handler(drive,
1018           &idefloppy_pc_intr,           /* service routine for packet command */
1019           floppy->ticks,                /* wait this long before "failing" */
1020           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
1021         return ide_started;
1022 }
1023
1024 /**
1025  * idefloppy_should_report_error()
1026  *
1027  * Supresses error messages resulting from Medium not present
1028  */
1029 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1030 {
1031         if (floppy->sense_key == 0x02 &&
1032             floppy->asc       == 0x3a &&
1033             floppy->ascq      == 0x00)
1034                 return 0;
1035         return 1;
1036 }
1037
1038 /*
1039  *      Issue a packet command
1040  */
1041 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1042 {
1043         idefloppy_floppy_t *floppy = drive->driver_data;
1044         ide_hwif_t *hwif = drive->hwif;
1045         atapi_feature_t feature;
1046         atapi_bcount_t bcount;
1047         ide_handler_t *pkt_xfer_routine;
1048
1049 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1050          and have lived on another thread's stack; that stack may have become
1051          unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1052 #if IDEFLOPPY_DEBUG_BUGS
1053         if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1054             pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1055                 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1056                         "Two request sense in serial were issued\n");
1057         }
1058 #endif /* IDEFLOPPY_DEBUG_BUGS */
1059 #endif
1060
1061         if (floppy->failed_pc == NULL &&
1062             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1063                 floppy->failed_pc = pc;
1064         /* Set the current packet command */
1065         floppy->pc = pc;
1066
1067         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1068             test_bit(PC_ABORT, &pc->flags)) {
1069                 /*
1070                  *      We will "abort" retrying a packet command in case
1071                  *      a legitimate error code was received.
1072                  */
1073                 if (!test_bit(PC_ABORT, &pc->flags)) {
1074                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1075                                 if (idefloppy_should_report_error(floppy))
1076                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1077                                                "pc = %2x, key = %2x, "
1078                                                "asc = %2x, ascq = %2x\n",
1079                                                drive->name, pc->c[0],
1080                                                floppy->sense_key,
1081                                                floppy->asc, floppy->ascq);
1082                         }
1083                         /* Giving up */
1084                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1085                 }
1086                 floppy->failed_pc = NULL;
1087                 pc->callback(drive);
1088                 return ide_stopped;
1089         }
1090
1091         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1092
1093         pc->retries++;
1094         /* We haven't transferred any data yet */
1095         pc->actually_transferred = 0;
1096         pc->current_position = pc->buffer;
1097         bcount.all = min(pc->request_transfer, 63 * 1024);
1098
1099         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
1100                 (void)__ide_dma_off(drive);
1101         }
1102         feature.all = 0;
1103
1104         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1105                 feature.b.dma = !hwif->dma_setup(drive);
1106
1107         if (IDE_CONTROL_REG)
1108                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1109         /* Use PIO/DMA */
1110         HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1111         HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1112         HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1113         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1114
1115         if (feature.b.dma) {    /* Begin DMA, if necessary */
1116                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1117                 hwif->dma_start(drive);
1118         }
1119
1120         /* Can we transfer the packet when we get the interrupt or wait? */
1121         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1122                 /* wait */
1123                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1124         } else {
1125                 /* immediate */
1126                 pkt_xfer_routine = &idefloppy_transfer_pc;
1127         }
1128
1129         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1130                 /* Issue the packet command */
1131                 ide_execute_command(drive, WIN_PACKETCMD,
1132                                 pkt_xfer_routine,
1133                                 IDEFLOPPY_WAIT_CMD,
1134                                 NULL);
1135                 return ide_started;
1136         } else {
1137                 /* Issue the packet command */
1138                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1139                 return (*pkt_xfer_routine) (drive);
1140         }
1141 }
1142
1143 static void idefloppy_rw_callback (ide_drive_t *drive)
1144 {
1145         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1146
1147         idefloppy_do_end_request(drive, 1, 0);
1148         return;
1149 }
1150
1151 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1152 {
1153         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1154                 "prevent = %d\n", prevent);
1155
1156         idefloppy_init_pc(pc);
1157         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1158         pc->c[4] = prevent;
1159 }
1160
1161 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1162 {
1163         idefloppy_init_pc(pc);
1164         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1165         pc->c[7] = 255;
1166         pc->c[8] = 255;
1167         pc->request_transfer = 255;
1168 }
1169
1170 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1171                                               int flags)
1172 {
1173         idefloppy_init_pc(pc);
1174         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1175         pc->c[1] = 0x17;
1176
1177         memset(pc->buffer, 0, 12);
1178         pc->buffer[1] = 0xA2;
1179         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1180
1181         if (flags & 1)                          /* Verify bit on... */
1182                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1183         pc->buffer[3] = 8;
1184
1185         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1186         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1187         pc->buffer_size=12;
1188         set_bit(PC_WRITING, &pc->flags);
1189 }
1190
1191 /*
1192  *      A mode sense command is used to "sense" floppy parameters.
1193  */
1194 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1195 {
1196         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1197
1198         idefloppy_init_pc(pc);
1199         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1200         pc->c[1] = 0;
1201         pc->c[2] = page_code + (type << 6);
1202
1203         switch (page_code) {
1204                 case IDEFLOPPY_CAPABILITIES_PAGE:
1205                         length += 12;
1206                         break;
1207                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1208                         length += 32;
1209                         break;
1210                 default:
1211                         printk(KERN_ERR "ide-floppy: unsupported page code "
1212                                 "in create_mode_sense_cmd\n");
1213         }
1214         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1215         pc->request_transfer = length;
1216 }
1217
1218 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1219 {
1220         idefloppy_init_pc(pc);
1221         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1222         pc->c[4] = start;
1223 }
1224
1225 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1226 {
1227         idefloppy_init_pc(pc);
1228         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1229 }
1230
1231 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1232 {
1233         int block = sector / floppy->bs_factor;
1234         int blocks = rq->nr_sectors / floppy->bs_factor;
1235         int cmd = rq_data_dir(rq);
1236
1237         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1238                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1239                 block, blocks);
1240
1241         idefloppy_init_pc(pc);
1242         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1243                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1244                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1245         } else {
1246                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1247                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1248         }
1249         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1250         pc->callback = &idefloppy_rw_callback;
1251         pc->rq = rq;
1252         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1253         if (rq->cmd_flags & REQ_RW)
1254                 set_bit(PC_WRITING, &pc->flags);
1255         pc->buffer = NULL;
1256         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1257         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1258 }
1259
1260 static int
1261 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1262 {
1263         /*
1264          * just support eject for now, it would not be hard to make the
1265          * REQ_BLOCK_PC support fully-featured
1266          */
1267         if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1268                 return 1;
1269
1270         idefloppy_init_pc(pc);
1271         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1272         return 0;
1273 }
1274
1275 /*
1276  *      idefloppy_do_request is our request handling function.
1277  */
1278 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1279 {
1280         idefloppy_floppy_t *floppy = drive->driver_data;
1281         idefloppy_pc_t *pc;
1282         unsigned long block = (unsigned long)block_s;
1283
1284         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1285                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1286                         rq->flags, rq->errors);
1287         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1288                         "current_nr_sectors: %d\n", (long)rq->sector,
1289                         rq->nr_sectors, rq->current_nr_sectors);
1290
1291         if (rq->errors >= ERROR_MAX) {
1292                 if (floppy->failed_pc != NULL) {
1293                         if (idefloppy_should_report_error(floppy))
1294                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1295                                        " key = %2x, asc = %2x, ascq = %2x\n",
1296                                        drive->name, floppy->failed_pc->c[0],
1297                                        floppy->sense_key, floppy->asc, floppy->ascq);
1298                 }
1299                 else
1300                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1301                                 drive->name);
1302                 idefloppy_do_end_request(drive, 0, 0);
1303                 return ide_stopped;
1304         }
1305         if (blk_fs_request(rq)) {
1306                 if (((long)rq->sector % floppy->bs_factor) ||
1307                     (rq->nr_sectors % floppy->bs_factor)) {
1308                         printk("%s: unsupported r/w request size\n",
1309                                 drive->name);
1310                         idefloppy_do_end_request(drive, 0, 0);
1311                         return ide_stopped;
1312                 }
1313                 pc = idefloppy_next_pc_storage(drive);
1314                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1315         } else if (blk_special_request(rq)) {
1316                 pc = (idefloppy_pc_t *) rq->buffer;
1317         } else if (blk_pc_request(rq)) {
1318                 pc = idefloppy_next_pc_storage(drive);
1319                 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1320                         idefloppy_do_end_request(drive, 0, 0);
1321                         return ide_stopped;
1322                 }
1323         } else {
1324                 blk_dump_rq_flags(rq,
1325                         "ide-floppy: unsupported command in queue");
1326                 idefloppy_do_end_request(drive, 0, 0);
1327                 return ide_stopped;
1328         }
1329
1330         pc->rq = rq;
1331         return idefloppy_issue_pc(drive, pc);
1332 }
1333
1334 /*
1335  *      idefloppy_queue_pc_tail adds a special packet command request to the
1336  *      tail of the request queue, and waits for it to be serviced.
1337  */
1338 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1339 {
1340         struct ide_floppy_obj *floppy = drive->driver_data;
1341         struct request rq;
1342
1343         ide_init_drive_cmd (&rq);
1344         rq.buffer = (char *) pc;
1345         rq.cmd_type = REQ_TYPE_SPECIAL;
1346         rq.rq_disk = floppy->disk;
1347
1348         return ide_do_drive_cmd(drive, &rq, ide_wait);
1349 }
1350
1351 /*
1352  *      Look at the flexible disk page parameters. We will ignore the CHS
1353  *      capacity parameters and use the LBA parameters instead.
1354  */
1355 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1356 {
1357         idefloppy_floppy_t *floppy = drive->driver_data;
1358         idefloppy_pc_t pc;
1359         idefloppy_mode_parameter_header_t *header;
1360         idefloppy_flexible_disk_page_t *page;
1361         int capacity, lba_capacity;
1362
1363         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1364         if (idefloppy_queue_pc_tail(drive,&pc)) {
1365                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1366                         "page parameters\n");
1367                 return 1;
1368         }
1369         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1370         floppy->wp = header->wp;
1371         set_disk_ro(floppy->disk, floppy->wp);
1372         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1373
1374         page->transfer_rate = ntohs(page->transfer_rate);
1375         page->sector_size = ntohs(page->sector_size);
1376         page->cyls = ntohs(page->cyls);
1377         page->rpm = ntohs(page->rpm);
1378         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1379         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1380                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1381                                 "%d sector size, %d rpm\n",
1382                         drive->name, capacity / 1024, page->cyls,
1383                         page->heads, page->sectors,
1384                         page->transfer_rate / 8, page->sector_size, page->rpm);
1385
1386         floppy->flexible_disk_page = *page;
1387         drive->bios_cyl = page->cyls;
1388         drive->bios_head = page->heads;
1389         drive->bios_sect = page->sectors;
1390         lba_capacity = floppy->blocks * floppy->block_size;
1391         if (capacity < lba_capacity) {
1392                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1393                         "bytes, but the drive only handles %d\n",
1394                         drive->name, lba_capacity, capacity);
1395                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1396         }
1397         return 0;
1398 }
1399
1400 static int idefloppy_get_capability_page(ide_drive_t *drive)
1401 {
1402         idefloppy_floppy_t *floppy = drive->driver_data;
1403         idefloppy_pc_t pc;
1404         idefloppy_mode_parameter_header_t *header;
1405         idefloppy_capabilities_page_t *page;
1406
1407         floppy->srfp = 0;
1408         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1409                                                  MODE_SENSE_CURRENT);
1410
1411         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1412         if (idefloppy_queue_pc_tail(drive,&pc)) {
1413                 return 1;
1414         }
1415
1416         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1417         page= (idefloppy_capabilities_page_t *)(header+1);
1418         floppy->srfp = page->srfp;
1419         return (0);
1420 }
1421
1422 /*
1423  *      Determine if a media is present in the floppy drive, and if so,
1424  *      its LBA capacity.
1425  */
1426 static int idefloppy_get_capacity (ide_drive_t *drive)
1427 {
1428         idefloppy_floppy_t *floppy = drive->driver_data;
1429         idefloppy_pc_t pc;
1430         idefloppy_capacity_header_t *header;
1431         idefloppy_capacity_descriptor_t *descriptor;
1432         int i, descriptors, rc = 1, blocks, length;
1433
1434         drive->bios_cyl = 0;
1435         drive->bios_head = drive->bios_sect = 0;
1436         floppy->blocks = floppy->bs_factor = 0;
1437         set_capacity(floppy->disk, 0);
1438
1439         idefloppy_create_read_capacity_cmd(&pc);
1440         if (idefloppy_queue_pc_tail(drive, &pc)) {
1441                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1442                 return 1;
1443         }
1444         header = (idefloppy_capacity_header_t *) pc.buffer;
1445         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1446         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1447
1448         for (i = 0; i < descriptors; i++, descriptor++) {
1449                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1450                 length = descriptor->length = ntohs(descriptor->length);
1451
1452                 if (!i)
1453                 {
1454                 switch (descriptor->dc) {
1455                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1456                 case CAPACITY_UNFORMATTED:
1457                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1458                                 /*
1459                                  * If it is not a clik drive, break out
1460                                  * (maintains previous driver behaviour)
1461                                  */
1462                                 break;
1463                 case CAPACITY_CURRENT:
1464                         /* Normal Zip/LS-120 disks */
1465                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1466                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1467                                         "sector size\n", drive->name,
1468                                         blocks * length / 1024, blocks, length);
1469                         floppy->capacity = *descriptor;
1470                         if (!length || length % 512) {
1471                                 printk(KERN_NOTICE "%s: %d bytes block size "
1472                                         "not supported\n", drive->name, length);
1473                         } else {
1474                                 floppy->blocks = blocks;
1475                                 floppy->block_size = length;
1476                                 if ((floppy->bs_factor = length / 512) != 1)
1477                                         printk(KERN_NOTICE "%s: warning: non "
1478                                                 "512 bytes block size not "
1479                                                 "fully supported\n",
1480                                                 drive->name);
1481                                 rc = 0;
1482                         }
1483                         break;
1484                 case CAPACITY_NO_CARTRIDGE:
1485                         /*
1486                          * This is a KERN_ERR so it appears on screen
1487                          * for the user to see
1488                          */
1489                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1490                         break;
1491                 case CAPACITY_INVALID:
1492                         printk(KERN_ERR "%s: Invalid capacity for disk "
1493                                 "in drive\n", drive->name);
1494                         break;
1495                 }
1496                 }
1497                 if (!i) {
1498                         debug_log( "Descriptor 0 Code: %d\n",
1499                                 descriptor->dc);
1500                 }
1501                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1502                         "sector size\n", i, blocks * length / 1024, blocks,
1503                         length);
1504         }
1505
1506         /* Clik! disk does not support get_flexible_disk_page */
1507         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1508                 (void) idefloppy_get_flexible_disk_page(drive);
1509         }
1510
1511         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1512         return rc;
1513 }
1514
1515 /*
1516 ** Obtain the list of formattable capacities.
1517 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1518 ** descriptors to userland, instead of our own structures.
1519 **
1520 ** Userland gives us the following structure:
1521 **
1522 ** struct idefloppy_format_capacities {
1523 **        int nformats;
1524 **        struct {
1525 **                int nblocks;
1526 **                int blocksize;
1527 **                } formats[];
1528 **        } ;
1529 **
1530 ** userland initializes nformats to the number of allocated formats[]
1531 ** records.  On exit we set nformats to the number of records we've
1532 ** actually initialized.
1533 **
1534 */
1535
1536 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1537 {
1538         idefloppy_pc_t pc;
1539         idefloppy_capacity_header_t *header;
1540         idefloppy_capacity_descriptor_t *descriptor;
1541         int i, descriptors, blocks, length;
1542         int u_array_size;
1543         int u_index;
1544         int __user *argp;
1545
1546         if (get_user(u_array_size, arg))
1547                 return (-EFAULT);
1548
1549         if (u_array_size <= 0)
1550                 return (-EINVAL);
1551
1552         idefloppy_create_read_capacity_cmd(&pc);
1553         if (idefloppy_queue_pc_tail(drive, &pc)) {
1554                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1555                 return (-EIO);
1556         }
1557         header = (idefloppy_capacity_header_t *) pc.buffer;
1558         descriptors = header->length /
1559                 sizeof(idefloppy_capacity_descriptor_t);
1560         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1561
1562         u_index = 0;
1563         argp = arg + 1;
1564
1565         /*
1566         ** We always skip the first capacity descriptor.  That's the
1567         ** current capacity.  We are interested in the remaining descriptors,
1568         ** the formattable capacities.
1569         */
1570
1571         for (i=0; i<descriptors; i++, descriptor++) {
1572                 if (u_index >= u_array_size)
1573                         break;  /* User-supplied buffer too small */
1574                 if (i == 0)
1575                         continue;       /* Skip the first descriptor */
1576
1577                 blocks = ntohl(descriptor->blocks);
1578                 length = ntohs(descriptor->length);
1579
1580                 if (put_user(blocks, argp))
1581                         return(-EFAULT);
1582                 ++argp;
1583
1584                 if (put_user(length, argp))
1585                         return (-EFAULT);
1586                 ++argp;
1587
1588                 ++u_index;
1589         }
1590
1591         if (put_user(u_index, arg))
1592                 return (-EFAULT);
1593         return (0);
1594 }
1595
1596 /*
1597 ** Send ATAPI_FORMAT_UNIT to the drive.
1598 **
1599 ** Userland gives us the following structure:
1600 **
1601 ** struct idefloppy_format_command {
1602 **        int nblocks;
1603 **        int blocksize;
1604 **        int flags;
1605 **        } ;
1606 **
1607 ** flags is a bitmask, currently, the only defined flag is:
1608 **
1609 **        0x01 - verify media after format.
1610 */
1611
1612 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1613 {
1614         int blocks;
1615         int length;
1616         int flags;
1617         idefloppy_pc_t pc;
1618
1619         if (get_user(blocks, arg) ||
1620             get_user(length, arg+1) ||
1621             get_user(flags, arg+2)) {
1622                 return (-EFAULT);
1623         }
1624
1625         /* Get the SFRP bit */
1626         (void) idefloppy_get_capability_page(drive);
1627         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1628         if (idefloppy_queue_pc_tail(drive, &pc)) {
1629                 return (-EIO);
1630         }
1631
1632         return (0);
1633 }
1634
1635 /*
1636 ** Get ATAPI_FORMAT_UNIT progress indication.
1637 **
1638 ** Userland gives a pointer to an int.  The int is set to a progress
1639 ** indicator 0-65536, with 65536=100%.
1640 **
1641 ** If the drive does not support format progress indication, we just check
1642 ** the dsc bit, and return either 0 or 65536.
1643 */
1644
1645 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1646 {
1647         idefloppy_floppy_t *floppy = drive->driver_data;
1648         idefloppy_pc_t pc;
1649         int progress_indication = 0x10000;
1650
1651         if (floppy->srfp) {
1652                 idefloppy_create_request_sense_cmd(&pc);
1653                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1654                         return (-EIO);
1655                 }
1656
1657                 if (floppy->sense_key == 2 &&
1658                     floppy->asc == 4 &&
1659                     floppy->ascq == 4) {
1660                         progress_indication = floppy->progress_indication;
1661                 }
1662                 /* Else assume format_unit has finished, and we're
1663                 ** at 0x10000 */
1664         } else {
1665                 atapi_status_t status;
1666                 unsigned long flags;
1667
1668                 local_irq_save(flags);
1669                 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1670                 local_irq_restore(flags);
1671
1672                 progress_indication = !status.b.dsc ? 0 : 0x10000;
1673         }
1674         if (put_user(progress_indication, arg))
1675                 return (-EFAULT);
1676
1677         return (0);
1678 }
1679
1680 /*
1681  *      Return the current floppy capacity.
1682  */
1683 static sector_t idefloppy_capacity (ide_drive_t *drive)
1684 {
1685         idefloppy_floppy_t *floppy = drive->driver_data;
1686         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1687
1688         return capacity;
1689 }
1690
1691 /*
1692  *      idefloppy_identify_device checks if we can support a drive,
1693  *      based on the ATAPI IDENTIFY command results.
1694  */
1695 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1696 {
1697         struct idefloppy_id_gcw gcw;
1698 #if IDEFLOPPY_DEBUG_INFO
1699         u16 mask,i;
1700         char buffer[80];
1701 #endif /* IDEFLOPPY_DEBUG_INFO */
1702
1703         *((u16 *) &gcw) = id->config;
1704
1705 #ifdef CONFIG_PPC
1706         /* kludge for Apple PowerBook internal zip */
1707         if ((gcw.device_type == 5) &&
1708             !strstr(id->model, "CD-ROM") &&
1709             strstr(id->model, "ZIP"))
1710                 gcw.device_type = 0;
1711 #endif
1712
1713 #if IDEFLOPPY_DEBUG_INFO
1714         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1715         switch (gcw.protocol) {
1716                 case 0: case 1: sprintf(buffer, "ATA");break;
1717                 case 2: sprintf(buffer, "ATAPI");break;
1718                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1719         }
1720         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1721         switch (gcw.device_type) {
1722                 case 0: sprintf(buffer, "Direct-access Device");break;
1723                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1724                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1725                 case 5: sprintf(buffer, "CD-ROM Device");break;
1726                 case 6: sprintf(buffer, "Reserved");
1727                 case 7: sprintf(buffer, "Optical memory Device");break;
1728                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1729                 default: sprintf(buffer, "Reserved");
1730         }
1731         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1732         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1733         switch (gcw.drq_type) {
1734                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1735                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1736                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1737                 case 3: sprintf(buffer, "Reserved");break;
1738         }
1739         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1740         switch (gcw.packet_size) {
1741                 case 0: sprintf(buffer, "12 bytes");break;
1742                 case 1: sprintf(buffer, "16 bytes");break;
1743                 default: sprintf(buffer, "Reserved");break;
1744         }
1745         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1746         printk(KERN_INFO "Model: %.40s\n",id->model);
1747         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1748         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1749         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1750         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1751         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1752         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1753         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1754         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1755         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1756         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1757         printk(KERN_INFO "Single Word DMA supported modes:\n");
1758         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1759                 if (id->dma_1word & mask)
1760                         printk(KERN_INFO "   Mode %d%s\n", i,
1761                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1762         }
1763         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1764         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1765                 if (id->dma_mword & mask)
1766                         printk(KERN_INFO "   Mode %d%s\n", i,
1767                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1768         }
1769         if (id->field_valid & 0x0002) {
1770                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1771                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1772                 if (id->eide_dma_min == 0)
1773                         sprintf(buffer, "Not supported");
1774                 else
1775                         sprintf(buffer, "%d ns",id->eide_dma_min);
1776                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1777                 if (id->eide_dma_time == 0)
1778                         sprintf(buffer, "Not supported");
1779                 else
1780                         sprintf(buffer, "%d ns",id->eide_dma_time);
1781                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1782                 if (id->eide_pio == 0)
1783                         sprintf(buffer, "Not supported");
1784                 else
1785                         sprintf(buffer, "%d ns",id->eide_pio);
1786                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1787                         buffer);
1788                 if (id->eide_pio_iordy == 0)
1789                         sprintf(buffer, "Not supported");
1790                 else
1791                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1792                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1793         } else
1794                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1795 #endif /* IDEFLOPPY_DEBUG_INFO */
1796
1797         if (gcw.protocol != 2)
1798                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1799         else if (gcw.device_type != 0)
1800                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1801         else if (!gcw.removable)
1802                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1803         else if (gcw.drq_type == 3) {
1804                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1805         } else if (gcw.packet_size != 0) {
1806                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1807         } else
1808                 return 1;
1809         return 0;
1810 }
1811
1812 static void idefloppy_add_settings(ide_drive_t *drive)
1813 {
1814         idefloppy_floppy_t *floppy = drive->driver_data;
1815
1816 /*
1817  *                      drive   setting name    read/write      ioctl   ioctl           data type       min     max     mul_factor      div_factor      data pointer            set function
1818  */
1819         ide_add_setting(drive,  "bios_cyl",             SETTING_RW,                                     -1,                     -1,                     TYPE_INT,       0,      1023,                           1,      1,      &drive->bios_cyl,               NULL);
1820         ide_add_setting(drive,  "bios_head",            SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      255,                            1,      1,      &drive->bios_head,              NULL);
1821         ide_add_setting(drive,  "bios_sect",            SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      63,                             1,      1,      &drive->bios_sect,              NULL);
1822         ide_add_setting(drive,  "ticks",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      255,                            1,      1,      &floppy->ticks,         NULL);
1823 }
1824
1825 /*
1826  *      Driver initialization.
1827  */
1828 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1829 {
1830         struct idefloppy_id_gcw gcw;
1831
1832         *((u16 *) &gcw) = drive->id->config;
1833         floppy->pc = floppy->pc_stack;
1834         if (gcw.drq_type == 1)
1835                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1836         /*
1837          *      We used to check revisions here. At this point however
1838          *      I'm giving up. Just assume they are all broken, its easier.
1839          *
1840          *      The actual reason for the workarounds was likely
1841          *      a driver bug after all rather than a firmware bug,
1842          *      and the workaround below used to hide it. It should
1843          *      be fixed as of version 1.9, but to be on the safe side
1844          *      we'll leave the limitation below for the 2.2.x tree.
1845          */
1846
1847         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1848                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1849                 /* This value will be visible in the /proc/ide/hdx/settings */
1850                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1851                 blk_queue_max_sectors(drive->queue, 64);
1852         }
1853
1854         /*
1855         *      Guess what?  The IOMEGA Clik! drive also needs the
1856         *      above fix.  It makes nasty clicking noises without
1857         *      it, so please don't remove this.
1858         */
1859         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1860                 blk_queue_max_sectors(drive->queue, 64);
1861                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1862         }
1863
1864
1865         (void) idefloppy_get_capacity(drive);
1866         idefloppy_add_settings(drive);
1867 }
1868
1869 static void ide_floppy_remove(ide_drive_t *drive)
1870 {
1871         idefloppy_floppy_t *floppy = drive->driver_data;
1872         struct gendisk *g = floppy->disk;
1873
1874         ide_unregister_subdriver(drive, floppy->driver);
1875
1876         del_gendisk(g);
1877
1878         ide_floppy_put(floppy);
1879 }
1880
1881 static void ide_floppy_release(struct kref *kref)
1882 {
1883         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1884         ide_drive_t *drive = floppy->drive;
1885         struct gendisk *g = floppy->disk;
1886
1887         drive->driver_data = NULL;
1888         g->private_data = NULL;
1889         put_disk(g);
1890         kfree(floppy);
1891 }
1892
1893 #ifdef CONFIG_PROC_FS
1894
1895 static int proc_idefloppy_read_capacity
1896         (char *page, char **start, off_t off, int count, int *eof, void *data)
1897 {
1898         ide_drive_t*drive = (ide_drive_t *)data;
1899         int len;
1900
1901         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1902         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1903 }
1904
1905 static ide_proc_entry_t idefloppy_proc[] = {
1906         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1907         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1908         { NULL, 0, NULL, NULL }
1909 };
1910
1911 #else
1912
1913 #define idefloppy_proc  NULL
1914
1915 #endif  /* CONFIG_PROC_FS */
1916
1917 static int ide_floppy_probe(ide_drive_t *);
1918
1919 static ide_driver_t idefloppy_driver = {
1920         .gen_driver = {
1921                 .owner          = THIS_MODULE,
1922                 .name           = "ide-floppy",
1923                 .bus            = &ide_bus_type,
1924         },
1925         .probe                  = ide_floppy_probe,
1926         .remove                 = ide_floppy_remove,
1927         .version                = IDEFLOPPY_VERSION,
1928         .media                  = ide_floppy,
1929         .supports_dsc_overlap   = 0,
1930         .do_request             = idefloppy_do_request,
1931         .end_request            = idefloppy_do_end_request,
1932         .error                  = __ide_error,
1933         .abort                  = __ide_abort,
1934         .proc                   = idefloppy_proc,
1935 };
1936
1937 static int idefloppy_open(struct inode *inode, struct file *filp)
1938 {
1939         struct gendisk *disk = inode->i_bdev->bd_disk;
1940         struct ide_floppy_obj *floppy;
1941         ide_drive_t *drive;
1942         idefloppy_pc_t pc;
1943         int ret = 0;
1944
1945         debug_log(KERN_INFO "Reached idefloppy_open\n");
1946
1947         if (!(floppy = ide_floppy_get(disk)))
1948                 return -ENXIO;
1949
1950         drive = floppy->drive;
1951
1952         drive->usage++;
1953
1954         if (drive->usage == 1) {
1955                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1956                 /* Just in case */
1957
1958                 idefloppy_create_test_unit_ready_cmd(&pc);
1959                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1960                         idefloppy_create_start_stop_cmd(&pc, 1);
1961                         (void) idefloppy_queue_pc_tail(drive, &pc);
1962                 }
1963
1964                 if (idefloppy_get_capacity (drive)
1965                    && (filp->f_flags & O_NDELAY) == 0
1966                     /*
1967                     ** Allow O_NDELAY to open a drive without a disk, or with
1968                     ** an unreadable disk, so that we can get the format
1969                     ** capacity of the drive or begin the format - Sam
1970                     */
1971                     ) {
1972                         drive->usage--;
1973                         ret = -EIO;
1974                         goto out_put_floppy;
1975                 }
1976
1977                 if (floppy->wp && (filp->f_mode & 2)) {
1978                         drive->usage--;
1979                         ret = -EROFS;
1980                         goto out_put_floppy;
1981                 }
1982                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1983                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1984                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1985                         idefloppy_create_prevent_cmd(&pc, 1);
1986                         (void) idefloppy_queue_pc_tail(drive, &pc);
1987                 }
1988                 check_disk_change(inode->i_bdev);
1989         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1990                 drive->usage--;
1991                 ret = -EBUSY;
1992                 goto out_put_floppy;
1993         }
1994         return 0;
1995
1996 out_put_floppy:
1997         ide_floppy_put(floppy);
1998         return ret;
1999 }
2000
2001 static int idefloppy_release(struct inode *inode, struct file *filp)
2002 {
2003         struct gendisk *disk = inode->i_bdev->bd_disk;
2004         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2005         ide_drive_t *drive = floppy->drive;
2006         idefloppy_pc_t pc;
2007
2008         debug_log(KERN_INFO "Reached idefloppy_release\n");
2009
2010         if (drive->usage == 1) {
2011                 /* IOMEGA Clik! drives do not support lock/unlock commands */
2012                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2013                         idefloppy_create_prevent_cmd(&pc, 0);
2014                         (void) idefloppy_queue_pc_tail(drive, &pc);
2015                 }
2016
2017                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2018         }
2019         drive->usage--;
2020
2021         ide_floppy_put(floppy);
2022
2023         return 0;
2024 }
2025
2026 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2027 {
2028         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2029         ide_drive_t *drive = floppy->drive;
2030
2031         geo->heads = drive->bios_head;
2032         geo->sectors = drive->bios_sect;
2033         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2034         return 0;
2035 }
2036
2037 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2038                         unsigned int cmd, unsigned long arg)
2039 {
2040         struct block_device *bdev = inode->i_bdev;
2041         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2042         ide_drive_t *drive = floppy->drive;
2043         void __user *argp = (void __user *)arg;
2044         int err;
2045         int prevent = (arg) ? 1 : 0;
2046         idefloppy_pc_t pc;
2047
2048         switch (cmd) {
2049         case CDROMEJECT:
2050                 prevent = 0;
2051                 /* fall through */
2052         case CDROM_LOCKDOOR:
2053                 if (drive->usage > 1)
2054                         return -EBUSY;
2055
2056                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2057                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2058                         idefloppy_create_prevent_cmd(&pc, prevent);
2059                         (void) idefloppy_queue_pc_tail(drive, &pc);
2060                 }
2061                 if (cmd == CDROMEJECT) {
2062                         idefloppy_create_start_stop_cmd(&pc, 2);
2063                         (void) idefloppy_queue_pc_tail(drive, &pc);
2064                 }
2065                 return 0;
2066         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2067                 return 0;
2068         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2069                 return idefloppy_get_format_capacities(drive, argp);
2070         case IDEFLOPPY_IOCTL_FORMAT_START:
2071
2072                 if (!(file->f_mode & 2))
2073                         return -EPERM;
2074
2075                 if (drive->usage > 1) {
2076                         /* Don't format if someone is using the disk */
2077
2078                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2079                                   &floppy->flags);
2080                         return -EBUSY;
2081                 }
2082
2083                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2084
2085                 err = idefloppy_begin_format(drive, argp);
2086                 if (err)
2087                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2088                 return err;
2089                 /*
2090                 ** Note, the bit will be cleared when the device is
2091                 ** closed.  This is the cleanest way to handle the
2092                 ** situation where the drive does not support
2093                 ** format progress reporting.
2094                 */
2095         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2096                 return idefloppy_get_format_progress(drive, argp);
2097         }
2098         return generic_ide_ioctl(drive, file, bdev, cmd, arg);
2099 }
2100
2101 static int idefloppy_media_changed(struct gendisk *disk)
2102 {
2103         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2104         ide_drive_t *drive = floppy->drive;
2105
2106         /* do not scan partitions twice if this is a removable device */
2107         if (drive->attach) {
2108                 drive->attach = 0;
2109                 return 0;
2110         }
2111         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2112 }
2113
2114 static int idefloppy_revalidate_disk(struct gendisk *disk)
2115 {
2116         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2117         set_capacity(disk, idefloppy_capacity(floppy->drive));
2118         return 0;
2119 }
2120
2121 static struct block_device_operations idefloppy_ops = {
2122         .owner          = THIS_MODULE,
2123         .open           = idefloppy_open,
2124         .release        = idefloppy_release,
2125         .ioctl          = idefloppy_ioctl,
2126         .getgeo         = idefloppy_getgeo,
2127         .media_changed  = idefloppy_media_changed,
2128         .revalidate_disk= idefloppy_revalidate_disk
2129 };
2130
2131 static int ide_floppy_probe(ide_drive_t *drive)
2132 {
2133         idefloppy_floppy_t *floppy;
2134         struct gendisk *g;
2135
2136         if (!strstr("ide-floppy", drive->driver_req))
2137                 goto failed;
2138         if (!drive->present)
2139                 goto failed;
2140         if (drive->media != ide_floppy)
2141                 goto failed;
2142         if (!idefloppy_identify_device (drive, drive->id)) {
2143                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2144                 goto failed;
2145         }
2146         if (drive->scsi) {
2147                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2148                 goto failed;
2149         }
2150         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2151                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2152                 goto failed;
2153         }
2154
2155         g = alloc_disk(1 << PARTN_BITS);
2156         if (!g)
2157                 goto out_free_floppy;
2158
2159         ide_init_disk(g, drive);
2160
2161         ide_register_subdriver(drive, &idefloppy_driver);
2162
2163         kref_init(&floppy->kref);
2164
2165         floppy->drive = drive;
2166         floppy->driver = &idefloppy_driver;
2167         floppy->disk = g;
2168
2169         g->private_data = &floppy->driver;
2170
2171         drive->driver_data = floppy;
2172
2173         idefloppy_setup (drive, floppy);
2174
2175         g->minors = 1 << PARTN_BITS;
2176         g->driverfs_dev = &drive->gendev;
2177         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2178         g->fops = &idefloppy_ops;
2179         drive->attach = 1;
2180         add_disk(g);
2181         return 0;
2182
2183 out_free_floppy:
2184         kfree(floppy);
2185 failed:
2186         return -ENODEV;
2187 }
2188
2189 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2190
2191 static void __exit idefloppy_exit (void)
2192 {
2193         driver_unregister(&idefloppy_driver.gen_driver);
2194 }
2195
2196 static int __init idefloppy_init(void)
2197 {
2198         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2199         return driver_register(&idefloppy_driver.gen_driver);
2200 }
2201
2202 MODULE_ALIAS("ide:*m-floppy*");
2203 module_init(idefloppy_init);
2204 module_exit(idefloppy_exit);
2205 MODULE_LICENSE("GPL");