drivers/ide/ide-floppy.c

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