git.oblomov.eu Git - linux-2.6/blob - 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 <linux/irq.h>
  46 #include <linux/uaccess.h>
  47 #include <linux/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(fmt, args...) \
  62         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  63 #else
  64 #define debug_log(fmt, args... ) do {} while(0)
  65 #endif
  66
  67
  68 /*
  69  *      Some drives require a longer irq timeout.
  70  */
  71 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  72
  73 /*
  74  *      After each failed packet command we issue a request sense command
  75  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  76  */
  77 #define IDEFLOPPY_MAX_PC_RETRIES        3
  78
  79 /*
  80  *      With each packet command, we allocate a buffer of
  81  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
  82  */
  83 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  84
  85 /*
  86  *      In various places in the driver, we need to allocate storage
  87  *      for packet commands and requests, which will remain valid while
  88  *      we leave the driver to wait for an interrupt or a timeout event.
  89  */
  90 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  91
  92 /*
  93  *      Our view of a packet command.
  94  */
  95 typedef struct idefloppy_packet_command_s {
  96         u8 c[12];                               /* Actual packet bytes */
  97         int retries;                            /* On each retry, we increment retries */
  98         int error;                              /* Error code */
  99         int request_transfer;                   /* Bytes to transfer */
 100         int actually_transferred;               /* Bytes actually transferred */
 101         int buffer_size;                        /* Size of our data buffer */
 102         int b_count;                            /* Missing/Available data on the current buffer */
 103         struct request *rq;                     /* The corresponding request */
 104         u8 *buffer;                             /* Data buffer */
 105         u8 *current_position;                   /* Pointer into the above buffer */
 106         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 107         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 108         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 109 } idefloppy_pc_t;
 110
 111 /*
 112  *      Packet command flag bits.
 113  */
 114 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 115 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 116 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 117 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 118 #define PC_WRITING                      5       /* Data direction */
 119
 120 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 121
 122 /* format capacities descriptor codes */
 123 #define CAPACITY_INVALID        0x00
 124 #define CAPACITY_UNFORMATTED    0x01
 125 #define CAPACITY_CURRENT        0x02
 126 #define CAPACITY_NO_CARTRIDGE   0x03
 127
 128 /*
 129  *      Most of our global data which we need to save even as we leave the
 130  *      driver due to an interrupt or a timer event is stored in a variable
 131  *      of type idefloppy_floppy_t, defined below.
 132  */
 133 typedef struct ide_floppy_obj {
 134         ide_drive_t     *drive;
 135         ide_driver_t    *driver;
 136         struct gendisk  *disk;
 137         struct kref     kref;
 138         unsigned int    openers;        /* protected by BKL for now */
 139
 140         /* Current packet command */
 141         idefloppy_pc_t *pc;
 142         /* Last failed packet command */
 143         idefloppy_pc_t *failed_pc;
 144         /* Packet command stack */
 145         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 146         /* Next free packet command storage space */
 147         int pc_stack_index;
 148         struct request rq_stack[IDEFLOPPY_PC_STACK];
 149         /* We implement a circular array */
 150         int rq_stack_index;
 151
 152         /*
 153          *      Last error information
 154          */
 155         u8 sense_key, asc, ascq;
 156         /* delay this long before sending packet command */
 157         u8 ticks;
 158         int progress_indication;
 159
 160         /*
 161          *      Device information
 162          */
 163         /* Current format */
 164         int blocks, block_size, bs_factor;
 165         /* Last format capacity descriptor */
 166         u8 cap_desc[8];
 167         /* Copy of the flexible disk page */
 168         u8 flexible_disk_page[32];
 169         /* Write protect */
 170         int wp;
 171         /* Supports format progress report */
 172         int srfp;
 173         /* Status/Action flags */
 174         unsigned long flags;
 175 } idefloppy_floppy_t;
 176
 177 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 178
 179 /*
 180  *      Floppy flag bits values.
 181  */
 182 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 183 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 184 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 185 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 186 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 187 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 188
 189 /*
 190  *      Defines for the mode sense command
 191  */
 192 #define MODE_SENSE_CURRENT              0x00
 193 #define MODE_SENSE_CHANGEABLE           0x01
 194 #define MODE_SENSE_DEFAULT              0x02
 195 #define MODE_SENSE_SAVED                0x03
 196
 197 /*
 198  *      IOCTLs used in low-level formatting.
 199  */
 200
 201 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 202 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 203 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 204 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 205
 206 /*
 207  *      Error codes which are returned in rq->errors to the higher part
 208  *      of the driver.
 209  */
 210 #define IDEFLOPPY_ERROR_GENERAL         101
 211
 212 /*
 213  *      The following is used to format the general configuration word of
 214  *      the ATAPI IDENTIFY DEVICE command.
 215  */
 216 struct idefloppy_id_gcw {
 217 #if defined(__LITTLE_ENDIAN_BITFIELD)
 218         unsigned packet_size            :2;     /* Packet Size */
 219         unsigned reserved234            :3;     /* Reserved */
 220         unsigned drq_type               :2;     /* Command packet DRQ type */
 221         unsigned removable              :1;     /* Removable media */
 222         unsigned device_type            :5;     /* Device type */
 223         unsigned reserved13             :1;     /* Reserved */
 224         unsigned protocol               :2;     /* Protocol type */
 225 #elif defined(__BIG_ENDIAN_BITFIELD)
 226         unsigned protocol               :2;     /* Protocol type */
 227         unsigned reserved13             :1;     /* Reserved */
 228         unsigned device_type            :5;     /* Device type */
 229         unsigned removable              :1;     /* Removable media */
 230         unsigned drq_type               :2;     /* Command packet DRQ type */
 231         unsigned reserved234            :3;     /* Reserved */
 232         unsigned packet_size            :2;     /* Packet Size */
 233 #else
 234 #error "Bitfield endianness not defined! Check your byteorder.h"
 235 #endif
 236 };
 237
 238 /*
 239  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 240  * See SFF-8070i spec.
 241  */
 242 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 243 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 244
 245 static DEFINE_MUTEX(idefloppy_ref_mutex);
 246
 247 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 248
 249 #define ide_floppy_g(disk) \
 250         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 251
 252 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 253 {
 254         struct ide_floppy_obj *floppy = NULL;
 255
 256         mutex_lock(&idefloppy_ref_mutex);
 257         floppy = ide_floppy_g(disk);
 258         if (floppy)
 259                 kref_get(&floppy->kref);
 260         mutex_unlock(&idefloppy_ref_mutex);
 261         return floppy;
 262 }
 263
 264 static void idefloppy_cleanup_obj(struct kref *);
 265
 266 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 267 {
 268         mutex_lock(&idefloppy_ref_mutex);
 269         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 270         mutex_unlock(&idefloppy_ref_mutex);
 271 }
 272
 273 /*
 274  *      Too bad. The drive wants to send us data which we are not ready to accept.
 275  *      Just throw it away.
 276  */
 277 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 278 {
 279         while (bcount--)
 280                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 281 }
 282
 283 #if IDEFLOPPY_DEBUG_BUGS
 284 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 285 {
 286         while (bcount--)
 287                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 288 }
 289 #endif /* IDEFLOPPY_DEBUG_BUGS */
 290
 291
 292 /*
 293  *      idefloppy_do_end_request is used to finish servicing a request.
 294  *
 295  *      For read/write requests, we will call ide_end_request to pass to the
 296  *      next buffer.
 297  */
 298 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 299 {
 300         idefloppy_floppy_t *floppy = drive->driver_data;
 301         struct request *rq = HWGROUP(drive)->rq;
 302         int error;
 303
 304         debug_log("Reached %s\n", __func__);
 305
 306         switch (uptodate) {
 307                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 308                 case 1: error = 0; break;
 309                 default: error = uptodate;
 310         }
 311         if (error)
 312                 floppy->failed_pc = NULL;
 313         /* Why does this happen? */
 314         if (!rq)
 315                 return 0;
 316         if (!blk_special_request(rq)) {
 317                 /* our real local end request function */
 318                 ide_end_request(drive, uptodate, nsecs);
 319                 return 0;
 320         }
 321         rq->errors = error;
 322         /* fixme: need to move this local also */
 323         ide_end_drive_cmd(drive, 0, 0);
 324         return 0;
 325 }
 326
 327 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 328 {
 329         struct request *rq = pc->rq;
 330         struct bio_vec *bvec;
 331         struct req_iterator iter;
 332         unsigned long flags;
 333         char *data;
 334         int count, done = 0;
 335
 336         rq_for_each_segment(bvec, rq, iter) {
 337                 if (!bcount)
 338                         break;
 339
 340                 count = min(bvec->bv_len, bcount);
 341
 342                 data = bvec_kmap_irq(bvec, &flags);
 343                 drive->hwif->atapi_input_bytes(drive, data, count);
 344                 bvec_kunmap_irq(data, &flags);
 345
 346                 bcount -= count;
 347                 pc->b_count += count;
 348                 done += count;
 349         }
 350
 351         idefloppy_do_end_request(drive, 1, done >> 9);
 352
 353         if (bcount) {
 354                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 355                 idefloppy_discard_data(drive, bcount);
 356         }
 357 }
 358
 359 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 360 {
 361         struct request *rq = pc->rq;
 362         struct req_iterator iter;
 363         struct bio_vec *bvec;
 364         unsigned long flags;
 365         int count, done = 0;
 366         char *data;
 367
 368         rq_for_each_segment(bvec, rq, iter) {
 369                 if (!bcount)
 370                         break;
 371
 372                 count = min(bvec->bv_len, bcount);
 373
 374                 data = bvec_kmap_irq(bvec, &flags);
 375                 drive->hwif->atapi_output_bytes(drive, data, count);
 376                 bvec_kunmap_irq(data, &flags);
 377
 378                 bcount -= count;
 379                 pc->b_count += count;
 380                 done += count;
 381         }
 382
 383         idefloppy_do_end_request(drive, 1, done >> 9);
 384
 385 #if IDEFLOPPY_DEBUG_BUGS
 386         if (bcount) {
 387                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 388                 idefloppy_write_zeros(drive, bcount);
 389         }
 390 #endif
 391 }
 392
 393 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 394 {
 395         struct request *rq = pc->rq;
 396         struct bio *bio = rq->bio;
 397
 398         while ((bio = rq->bio) != NULL)
 399                 idefloppy_do_end_request(drive, 1, 0);
 400 }
 401
 402 /*
 403  *      idefloppy_queue_pc_head generates a new packet command request in front
 404  *      of the request queue, before the current request, so that it will be
 405  *      processed immediately, on the next pass through the driver.
 406  */
 407 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 408 {
 409         struct ide_floppy_obj *floppy = drive->driver_data;
 410
 411         ide_init_drive_cmd(rq);
 412         rq->buffer = (char *) pc;
 413         rq->cmd_type = REQ_TYPE_SPECIAL;
 414         rq->rq_disk = floppy->disk;
 415         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 416 }
 417
 418 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 419 {
 420         idefloppy_floppy_t *floppy = drive->driver_data;
 421
 422         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 423                 floppy->pc_stack_index=0;
 424         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 425 }
 426
 427 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 428 {
 429         idefloppy_floppy_t *floppy = drive->driver_data;
 430
 431         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 432                 floppy->rq_stack_index = 0;
 433         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 434 }
 435
 436 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 437 {
 438         idefloppy_floppy_t *floppy = drive->driver_data;
 439         u8 *buf = floppy->pc->buffer;
 440
 441         debug_log("Reached %s\n", __func__);
 442
 443         if (!floppy->pc->error) {
 444                 floppy->sense_key = buf[2] & 0x0F;
 445                 floppy->asc = buf[12];
 446                 floppy->ascq = buf[13];
 447                 floppy->progress_indication = buf[15] & 0x80 ?
 448                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 449
 450                 if (floppy->failed_pc)
 451                         debug_log("pc = %x, sense key = %x, asc = %x,"
 452                                         " ascq = %x\n",
 453                                         floppy->failed_pc->c[0],
 454                                         floppy->sense_key,
 455                                         floppy->asc,
 456                                         floppy->ascq);
 457                 else
 458                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 459                                         floppy->sense_key,
 460                                         floppy->asc,
 461                                         floppy->ascq);
 462
 463
 464                 idefloppy_do_end_request(drive, 1, 0);
 465         } else {
 466                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 467                                 " request!\n");
 468                 idefloppy_do_end_request(drive, 0, 0);
 469         }
 470 }
 471
 472 /*
 473  *      General packet command callback function.
 474  */
 475 static void idefloppy_pc_callback (ide_drive_t *drive)
 476 {
 477         idefloppy_floppy_t *floppy = drive->driver_data;
 478
 479         debug_log("Reached %s\n", __func__);
 480
 481         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 482 }
 483
 484 /*
 485  *      idefloppy_init_pc initializes a packet command.
 486  */
 487 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 488 {
 489         memset(pc->c, 0, 12);
 490         pc->retries = 0;
 491         pc->flags = 0;
 492         pc->request_transfer = 0;
 493         pc->buffer = pc->pc_buffer;
 494         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 495         pc->callback = &idefloppy_pc_callback;
 496 }
 497
 498 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 499 {
 500         idefloppy_init_pc(pc);
 501         pc->c[0] = GPCMD_REQUEST_SENSE;
 502         pc->c[4] = 255;
 503         pc->request_transfer = 18;
 504         pc->callback = &idefloppy_request_sense_callback;
 505 }
 506
 507 /*
 508  *      idefloppy_retry_pc is called when an error was detected during the
 509  *      last packet command. We queue a request sense packet command in
 510  *      the head of the request list.
 511  */
 512 static void idefloppy_retry_pc (ide_drive_t *drive)
 513 {
 514         idefloppy_pc_t *pc;
 515         struct request *rq;
 516
 517         (void)drive->hwif->INB(IDE_ERROR_REG);
 518         pc = idefloppy_next_pc_storage(drive);
 519         rq = idefloppy_next_rq_storage(drive);
 520         idefloppy_create_request_sense_cmd(pc);
 521         idefloppy_queue_pc_head(drive, pc, rq);
 522 }
 523
 524 /*
 525  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 526  *      during a packet command.
 527  */
 528 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 529 {
 530         idefloppy_floppy_t *floppy = drive->driver_data;
 531         ide_hwif_t *hwif = drive->hwif;
 532         idefloppy_pc_t *pc = floppy->pc;
 533         struct request *rq = pc->rq;
 534         unsigned int temp;
 535         u16 bcount;
 536         u8 stat, ireason;
 537
 538         debug_log("Reached %s interrupt handler\n", __func__);
 539
 540         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 541                 if (HWIF(drive)->ide_dma_end(drive)) {
 542                         set_bit(PC_DMA_ERROR, &pc->flags);
 543                 } else {
 544                         pc->actually_transferred = pc->request_transfer;
 545                         idefloppy_update_buffers(drive, pc);
 546                 }
 547                 debug_log("DMA finished\n");
 548         }
 549
 550         /* Clear the interrupt */
 551         stat = drive->hwif->INB(IDE_STATUS_REG);
 552
 553         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 554                 debug_log("Packet command completed, %d bytes transferred\n",
 555                                 pc->actually_transferred);
 556                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 557
 558                 local_irq_enable_in_hardirq();
 559
 560                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 561                         /* Error detected */
 562                         debug_log("%s: I/O error\n", drive->name);
 563                         rq->errors++;
 564                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 565                                 printk(KERN_ERR "ide-floppy: I/O error in "
 566                                         "request sense command\n");
 567                                 return ide_do_reset(drive);
 568                         }
 569                         /* Retry operation */
 570                         idefloppy_retry_pc(drive);
 571                         /* queued, but not started */
 572                         return ide_stopped;
 573                 }
 574                 pc->error = 0;
 575                 if (floppy->failed_pc == pc)
 576                         floppy->failed_pc = NULL;
 577                 /* Command finished - Call the callback function */
 578                 pc->callback(drive);
 579                 return ide_stopped;
 580         }
 581
 582         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 583                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 584                         "more interrupts in DMA mode\n");
 585                 ide_dma_off(drive);
 586                 return ide_do_reset(drive);
 587         }
 588
 589         /* Get the number of bytes to transfer */
 590         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 591                   hwif->INB(IDE_BCOUNTL_REG);
 592         /* on this interrupt */
 593         ireason = hwif->INB(IDE_IREASON_REG);
 594
 595         if (ireason & CD) {
 596                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 597                 return ide_do_reset(drive);
 598         }
 599         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 600                 /* Hopefully, we will never get here */
 601                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 602                                 (ireason & IO) ? "Write" : "Read");
 603                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 604                                 (ireason & IO) ? "Read" : "Write");
 605                 return ide_do_reset(drive);
 606         }
 607         if (!test_bit(PC_WRITING, &pc->flags)) {
 608                 /* Reading - Check that we have enough space */
 609                 temp = pc->actually_transferred + bcount;
 610                 if (temp > pc->request_transfer) {
 611                         if (temp > pc->buffer_size) {
 612                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 613                                         "to send us more data than expected "
 614                                         "- discarding data\n");
 615                                 idefloppy_discard_data(drive, bcount);
 616
 617                                 ide_set_handler(drive,
 618                                                 &idefloppy_pc_intr,
 619                                                 IDEFLOPPY_WAIT_CMD,
 620                                                 NULL);
 621                                 return ide_started;
 622                         }
 623                         debug_log("The floppy wants to send us more data than"
 624                                         " expected - allowing transfer\n");
 625                 }
 626         }
 627         if (test_bit(PC_WRITING, &pc->flags)) {
 628                 if (pc->buffer != NULL)
 629                         /* Write the current buffer */
 630                         hwif->atapi_output_bytes(drive, pc->current_position,
 631                                                  bcount);
 632                 else
 633                         idefloppy_output_buffers(drive, pc, bcount);
 634         } else {
 635                 if (pc->buffer != NULL)
 636                         /* Read the current buffer */
 637                         hwif->atapi_input_bytes(drive, pc->current_position,
 638                                                 bcount);
 639                 else
 640                         idefloppy_input_buffers(drive, pc, bcount);
 641         }
 642         /* Update the current position */
 643         pc->actually_transferred += bcount;
 644         pc->current_position += bcount;
 645
 646         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 647         return ide_started;
 648 }
 649
 650 /*
 651  * This is the original routine that did the packet transfer.
 652  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 653  * for that drive below. The algorithm is chosen based on drive type
 654  */
 655 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 656 {
 657         ide_startstop_t startstop;
 658         idefloppy_floppy_t *floppy = drive->driver_data;
 659         u8 ireason;
 660
 661         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 662                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 663                                 "initiated yet DRQ isn't asserted\n");
 664                 return startstop;
 665         }
 666         ireason = drive->hwif->INB(IDE_IREASON_REG);
 667         if ((ireason & CD) == 0 || (ireason & IO)) {
 668                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 669                                 "issuing a packet command\n");
 670                 return ide_do_reset(drive);
 671         }
 672
 673         /* Set the interrupt routine */
 674         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 675         /* Send the actual packet */
 676         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 677         return ide_started;
 678 }
 679
 680
 681 /*
 682  * What we have here is a classic case of a top half / bottom half
 683  * interrupt service routine. In interrupt mode, the device sends
 684  * an interrupt to signal it's ready to receive a packet. However,
 685  * we need to delay about 2-3 ticks before issuing the packet or we
 686  * gets in trouble.
 687  *
 688  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 689  * directly). In either case, when the device says it's ready for a
 690  * packet, we schedule the packet transfer to occur about 2-3 ticks
 691  * later in transfer_pc2.
 692  */
 693 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 694 {
 695         idefloppy_floppy_t *floppy = drive->driver_data;
 696
 697         /* Send the actual packet */
 698         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 699         /* Timeout for the packet command */
 700         return IDEFLOPPY_WAIT_CMD;
 701 }
 702
 703 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 704 {
 705         idefloppy_floppy_t *floppy = drive->driver_data;
 706         ide_startstop_t startstop;
 707         u8 ireason;
 708
 709         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 710                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 711                                 "initiated yet DRQ isn't asserted\n");
 712                 return startstop;
 713         }
 714         ireason = drive->hwif->INB(IDE_IREASON_REG);
 715         if ((ireason & CD) == 0 || (ireason & IO)) {
 716                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 717                                 "while issuing a packet command\n");
 718                 return ide_do_reset(drive);
 719         }
 720         /*
 721          * The following delay solves a problem with ATAPI Zip 100 drives
 722          * where the Busy flag was apparently being deasserted before the
 723          * unit was ready to receive data. This was happening on a
 724          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 725          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 726          * used until after the packet is moved in about 50 msec.
 727          */
 728
 729         ide_set_handler(drive,
 730           &idefloppy_pc_intr,           /* service routine for packet command */
 731           floppy->ticks,                /* wait this long before "failing" */
 732           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 733         return ide_started;
 734 }
 735
 736 /**
 737  * idefloppy_should_report_error()
 738  *
 739  * Supresses error messages resulting from Medium not present
 740  */
 741 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
 742 {
 743         if (floppy->sense_key == 0x02 &&
 744             floppy->asc       == 0x3a &&
 745             floppy->ascq      == 0x00)
 746                 return 0;
 747         return 1;
 748 }
 749
 750 /*
 751  *      Issue a packet command
 752  */
 753 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 754 {
 755         idefloppy_floppy_t *floppy = drive->driver_data;
 756         ide_hwif_t *hwif = drive->hwif;
 757         ide_handler_t *pkt_xfer_routine;
 758         u16 bcount;
 759         u8 dma;
 760
 761         if (floppy->failed_pc == NULL &&
 762             pc->c[0] != GPCMD_REQUEST_SENSE)
 763                 floppy->failed_pc = pc;
 764         /* Set the current packet command */
 765         floppy->pc = pc;
 766
 767         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
 768             test_bit(PC_ABORT, &pc->flags)) {
 769                 /*
 770                  *      We will "abort" retrying a packet command in case
 771                  *      a legitimate error code was received.
 772                  */
 773                 if (!test_bit(PC_ABORT, &pc->flags)) {
 774                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
 775                                 if (idefloppy_should_report_error(floppy))
 776                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
 777                                                "pc = %2x, key = %2x, "
 778                                                "asc = %2x, ascq = %2x\n",
 779                                                drive->name, pc->c[0],
 780                                                floppy->sense_key,
 781                                                floppy->asc, floppy->ascq);
 782                         }
 783                         /* Giving up */
 784                         pc->error = IDEFLOPPY_ERROR_GENERAL;
 785                 }
 786                 floppy->failed_pc = NULL;
 787                 pc->callback(drive);
 788                 return ide_stopped;
 789         }
 790
 791         debug_log("Retry number - %d\n", pc->retries);
 792
 793         pc->retries++;
 794         /* We haven't transferred any data yet */
 795         pc->actually_transferred = 0;
 796         pc->current_position = pc->buffer;
 797         bcount = min(pc->request_transfer, 63 * 1024);
 798
 799         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 800                 ide_dma_off(drive);
 801
 802         dma = 0;
 803
 804         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 805                 dma = !hwif->dma_setup(drive);
 806
 807         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 808                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 809
 810         if (dma) {      /* Begin DMA, if necessary */
 811                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 812                 hwif->dma_start(drive);
 813         }
 814
 815         /* Can we transfer the packet when we get the interrupt or wait? */
 816         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
 817                 /* wait */
 818                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 819         } else {
 820                 /* immediate */
 821                 pkt_xfer_routine = &idefloppy_transfer_pc;
 822         }
 823
 824         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
 825                 /* Issue the packet command */
 826                 ide_execute_command(drive, WIN_PACKETCMD,
 827                                 pkt_xfer_routine,
 828                                 IDEFLOPPY_WAIT_CMD,
 829                                 NULL);
 830                 return ide_started;
 831         } else {
 832                 /* Issue the packet command */
 833                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 834                 return (*pkt_xfer_routine) (drive);
 835         }
 836 }
 837
 838 static void idefloppy_rw_callback (ide_drive_t *drive)
 839 {
 840         debug_log("Reached %s\n", __func__);
 841
 842         idefloppy_do_end_request(drive, 1, 0);
 843         return;
 844 }
 845
 846 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 847 {
 848         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 849
 850         idefloppy_init_pc(pc);
 851         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 852         pc->c[4] = prevent;
 853 }
 854
 855 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 856 {
 857         idefloppy_init_pc(pc);
 858         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 859         pc->c[7] = 255;
 860         pc->c[8] = 255;
 861         pc->request_transfer = 255;
 862 }
 863
 864 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 865                                               int flags)
 866 {
 867         idefloppy_init_pc(pc);
 868         pc->c[0] = GPCMD_FORMAT_UNIT;
 869         pc->c[1] = 0x17;
 870
 871         memset(pc->buffer, 0, 12);
 872         pc->buffer[1] = 0xA2;
 873         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 874
 875         if (flags & 1)                          /* Verify bit on... */
 876                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 877         pc->buffer[3] = 8;
 878
 879         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 880         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 881         pc->buffer_size=12;
 882         set_bit(PC_WRITING, &pc->flags);
 883 }
 884
 885 /*
 886  *      A mode sense command is used to "sense" floppy parameters.
 887  */
 888 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 889 {
 890         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 891
 892         idefloppy_init_pc(pc);
 893         pc->c[0] = GPCMD_MODE_SENSE_10;
 894         pc->c[1] = 0;
 895         pc->c[2] = page_code + (type << 6);
 896
 897         switch (page_code) {
 898                 case IDEFLOPPY_CAPABILITIES_PAGE:
 899                         length += 12;
 900                         break;
 901                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 902                         length += 32;
 903                         break;
 904                 default:
 905                         printk(KERN_ERR "ide-floppy: unsupported page code "
 906                                 "in create_mode_sense_cmd\n");
 907         }
 908         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 909         pc->request_transfer = length;
 910 }
 911
 912 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 913 {
 914         idefloppy_init_pc(pc);
 915         pc->c[0] = GPCMD_START_STOP_UNIT;
 916         pc->c[4] = start;
 917 }
 918
 919 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 920 {
 921         idefloppy_init_pc(pc);
 922         pc->c[0] = GPCMD_TEST_UNIT_READY;
 923 }
 924
 925 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
 926 {
 927         int block = sector / floppy->bs_factor;
 928         int blocks = rq->nr_sectors / floppy->bs_factor;
 929         int cmd = rq_data_dir(rq);
 930
 931         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
 932                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
 933                 block, blocks);
 934
 935         idefloppy_init_pc(pc);
 936         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
 937                 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12;
 938                 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]);
 939         } else {
 940                 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 941                 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 942         }
 943         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 944         pc->callback = &idefloppy_rw_callback;
 945         pc->rq = rq;
 946         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 947         if (rq->cmd_flags & REQ_RW)
 948                 set_bit(PC_WRITING, &pc->flags);
 949         pc->buffer = NULL;
 950         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 951         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 952 }
 953
 954 static void
 955 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 956 {
 957         idefloppy_init_pc(pc);
 958         pc->callback = &idefloppy_rw_callback;
 959         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 960         pc->rq = rq;
 961         pc->b_count = rq->data_len;
 962         if (rq->data_len && rq_data_dir(rq) == WRITE)
 963                 set_bit(PC_WRITING, &pc->flags);
 964         pc->buffer = rq->data;
 965         if (rq->bio)
 966                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 967
 968         /*
 969          * possibly problematic, doesn't look like ide-floppy correctly
 970          * handled scattered requests if dma fails...
 971          */
 972         pc->request_transfer = pc->buffer_size = rq->data_len;
 973 }
 974
 975 /*
 976  *      idefloppy_do_request is our request handling function.
 977  */
 978 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
 979 {
 980         idefloppy_floppy_t *floppy = drive->driver_data;
 981         idefloppy_pc_t *pc;
 982         unsigned long block = (unsigned long)block_s;
 983
 984         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 985                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 986                         rq->cmd_type, rq->errors);
 987         debug_log("sector: %ld, nr_sectors: %ld, "
 988                         "current_nr_sectors: %d\n", (long)rq->sector,
 989                         rq->nr_sectors, rq->current_nr_sectors);
 990
 991         if (rq->errors >= ERROR_MAX) {
 992                 if (floppy->failed_pc != NULL) {
 993                         if (idefloppy_should_report_error(floppy))
 994                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
 995                                        " key = %2x, asc = %2x, ascq = %2x\n",
 996                                        drive->name, floppy->failed_pc->c[0],
 997                                        floppy->sense_key, floppy->asc, floppy->ascq);
 998                 }
 999                 else
1000                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1001                                 drive->name);
1002                 idefloppy_do_end_request(drive, 0, 0);
1003                 return ide_stopped;
1004         }
1005         if (blk_fs_request(rq)) {
1006                 if (((long)rq->sector % floppy->bs_factor) ||
1007                     (rq->nr_sectors % floppy->bs_factor)) {
1008                         printk("%s: unsupported r/w request size\n",
1009                                 drive->name);
1010                         idefloppy_do_end_request(drive, 0, 0);
1011                         return ide_stopped;
1012                 }
1013                 pc = idefloppy_next_pc_storage(drive);
1014                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1015         } else if (blk_special_request(rq)) {
1016                 pc = (idefloppy_pc_t *) rq->buffer;
1017         } else if (blk_pc_request(rq)) {
1018                 pc = idefloppy_next_pc_storage(drive);
1019                 idefloppy_blockpc_cmd(floppy, pc, rq);
1020         } else {
1021                 blk_dump_rq_flags(rq,
1022                         "ide-floppy: unsupported command in queue");
1023                 idefloppy_do_end_request(drive, 0, 0);
1024                 return ide_stopped;
1025         }
1026
1027         pc->rq = rq;
1028         return idefloppy_issue_pc(drive, pc);
1029 }
1030
1031 /*
1032  *      idefloppy_queue_pc_tail adds a special packet command request to the
1033  *      tail of the request queue, and waits for it to be serviced.
1034  */
1035 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1036 {
1037         struct ide_floppy_obj *floppy = drive->driver_data;
1038         struct request rq;
1039
1040         ide_init_drive_cmd (&rq);
1041         rq.buffer = (char *) pc;
1042         rq.cmd_type = REQ_TYPE_SPECIAL;
1043         rq.rq_disk = floppy->disk;
1044
1045         return ide_do_drive_cmd(drive, &rq, ide_wait);
1046 }
1047
1048 /*
1049  * Look at the flexible disk page parameters. We ignore the CHS capacity
1050  * parameters and use the LBA parameters instead.
1051  */
1052 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1053 {
1054         idefloppy_floppy_t *floppy = drive->driver_data;
1055         idefloppy_pc_t pc;
1056         u8 *page;
1057         int capacity, lba_capacity;
1058         u16 transfer_rate, sector_size, cyls, rpm;
1059         u8 heads, sectors;
1060
1061         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1062                                         MODE_SENSE_CURRENT);
1063
1064         if (idefloppy_queue_pc_tail(drive, &pc)) {
1065                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1066                                 " parameters\n");
1067                 return 1;
1068         }
1069         floppy->wp = !!(pc.buffer[3] & 0x80);
1070         set_disk_ro(floppy->disk, floppy->wp);
1071         page = &pc.buffer[8];
1072
1073         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1074         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1075         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1076         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1077         heads         = pc.buffer[8 + 4];
1078         sectors       = pc.buffer[8 + 5];
1079
1080         capacity = cyls * heads * sectors * sector_size;
1081
1082         if (memcmp(page, &floppy->flexible_disk_page, 32))
1083                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1084                                 "%d sector size, %d rpm\n",
1085                                 drive->name, capacity / 1024, cyls, heads,
1086                                 sectors, transfer_rate / 8, sector_size, rpm);
1087
1088         memcpy(&floppy->flexible_disk_page, page, 32);
1089         drive->bios_cyl = cyls;
1090         drive->bios_head = heads;
1091         drive->bios_sect = sectors;
1092         lba_capacity = floppy->blocks * floppy->block_size;
1093
1094         if (capacity < lba_capacity) {
1095                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1096                         "bytes, but the drive only handles %d\n",
1097                         drive->name, lba_capacity, capacity);
1098                 floppy->blocks = floppy->block_size ?
1099                         capacity / floppy->block_size : 0;
1100         }
1101         return 0;
1102 }
1103
1104 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1105 {
1106         idefloppy_floppy_t *floppy = drive->driver_data;
1107         idefloppy_pc_t pc;
1108
1109         floppy->srfp = 0;
1110         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1111                                                  MODE_SENSE_CURRENT);
1112
1113         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1114         if (idefloppy_queue_pc_tail(drive, &pc))
1115                 return 1;
1116
1117         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1118         return (0);
1119 }
1120
1121 /*
1122  * Determine if a media is present in the floppy drive, and if so, its LBA
1123  * capacity.
1124  */
1125 static int ide_floppy_get_capacity(ide_drive_t *drive)
1126 {
1127         idefloppy_floppy_t *floppy = drive->driver_data;
1128         idefloppy_pc_t pc;
1129         u8 *cap_desc;
1130         u8 header_len, desc_cnt;
1131         int i, rc = 1, blocks, length;
1132
1133         drive->bios_cyl = 0;
1134         drive->bios_head = drive->bios_sect = 0;
1135         floppy->blocks = 0;
1136         floppy->bs_factor = 1;
1137         set_capacity(floppy->disk, 0);
1138
1139         idefloppy_create_read_capacity_cmd(&pc);
1140         if (idefloppy_queue_pc_tail(drive, &pc)) {
1141                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1142                 return 1;
1143         }
1144         header_len = pc.buffer[3];
1145         cap_desc = &pc.buffer[4];
1146         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1147
1148         for (i = 0; i < desc_cnt; i++) {
1149                 unsigned int desc_start = 4 + i*8;
1150
1151                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1152                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1153
1154                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1155                                 i, blocks * length / 1024, blocks, length);
1156
1157                 if (i)
1158                         continue;
1159                 /*
1160                  * the code below is valid only for the 1st descriptor, ie i=0
1161                  */
1162
1163                 switch (pc.buffer[desc_start + 4] & 0x03) {
1164                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1165                 case CAPACITY_UNFORMATTED:
1166                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1167                                 /*
1168                                  * If it is not a clik drive, break out
1169                                  * (maintains previous driver behaviour)
1170                                  */
1171                                 break;
1172                 case CAPACITY_CURRENT:
1173                         /* Normal Zip/LS-120 disks */
1174                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1175                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1176                                         "sector size\n", drive->name,
1177                                         blocks * length / 1024, blocks, length);
1178                         memcpy(&floppy->cap_desc, cap_desc, 8);
1179
1180                         if (!length || length % 512) {
1181                                 printk(KERN_NOTICE "%s: %d bytes block size "
1182                                         "not supported\n", drive->name, length);
1183                         } else {
1184                                 floppy->blocks = blocks;
1185                                 floppy->block_size = length;
1186                                 floppy->bs_factor = length / 512;
1187                                 if (floppy->bs_factor != 1)
1188                                         printk(KERN_NOTICE "%s: warning: non "
1189                                                 "512 bytes block size not "
1190                                                 "fully supported\n",
1191                                                 drive->name);
1192                                 rc = 0;
1193                         }
1194                         break;
1195                 case CAPACITY_NO_CARTRIDGE:
1196                         /*
1197                          * This is a KERN_ERR so it appears on screen
1198                          * for the user to see
1199                          */
1200                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1201                         break;
1202                 case CAPACITY_INVALID:
1203                         printk(KERN_ERR "%s: Invalid capacity for disk "
1204                                 "in drive\n", drive->name);
1205                         break;
1206                 }
1207                 debug_log("Descriptor 0 Code: %d\n",
1208                           pc.buffer[desc_start + 4] & 0x03);
1209         }
1210
1211         /* Clik! disk does not support get_flexible_disk_page */
1212         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1213                 (void) ide_floppy_get_flexible_disk_page(drive);
1214
1215         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1216         return rc;
1217 }
1218
1219 /*
1220  * Obtain the list of formattable capacities.
1221  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1222  * descriptors to userland, instead of our own structures.
1223  *
1224  * Userland gives us the following structure:
1225  *
1226  * struct idefloppy_format_capacities {
1227  *      int nformats;
1228  *      struct {
1229  *              int nblocks;
1230  *              int blocksize;
1231  *      } formats[];
1232  * };
1233  *
1234  * userland initializes nformats to the number of allocated formats[] records.
1235  * On exit we set nformats to the number of records we've actually initialized.
1236  */
1237
1238 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1239 {
1240         idefloppy_pc_t pc;
1241         u8 header_len, desc_cnt;
1242         int i, blocks, length, u_array_size, u_index;
1243         int __user *argp;
1244
1245         if (get_user(u_array_size, arg))
1246                 return (-EFAULT);
1247
1248         if (u_array_size <= 0)
1249                 return (-EINVAL);
1250
1251         idefloppy_create_read_capacity_cmd(&pc);
1252         if (idefloppy_queue_pc_tail(drive, &pc)) {
1253                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1254                 return (-EIO);
1255         }
1256         header_len = pc.buffer[3];
1257         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1258
1259         u_index = 0;
1260         argp = arg + 1;
1261
1262         /*
1263          * We always skip the first capacity descriptor.  That's the current
1264          * capacity.  We are interested in the remaining descriptors, the
1265          * formattable capacities.
1266          */
1267         for (i = 1; i < desc_cnt; i++) {
1268                 unsigned int desc_start = 4 + i*8;
1269
1270                 if (u_index >= u_array_size)
1271                         break;  /* User-supplied buffer too small */
1272
1273                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1274                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1275
1276                 if (put_user(blocks, argp))
1277                         return(-EFAULT);
1278                 ++argp;
1279
1280                 if (put_user(length, argp))
1281                         return (-EFAULT);
1282                 ++argp;
1283
1284                 ++u_index;
1285         }
1286
1287         if (put_user(u_index, arg))
1288                 return (-EFAULT);
1289         return (0);
1290 }
1291
1292 /*
1293 ** Send ATAPI_FORMAT_UNIT to the drive.
1294 **
1295 ** Userland gives us the following structure:
1296 **
1297 ** struct idefloppy_format_command {
1298 **        int nblocks;
1299 **        int blocksize;
1300 **        int flags;
1301 **        } ;
1302 **
1303 ** flags is a bitmask, currently, the only defined flag is:
1304 **
1305 **        0x01 - verify media after format.
1306 */
1307
1308 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1309 {
1310         int blocks;
1311         int length;
1312         int flags;
1313         idefloppy_pc_t pc;
1314
1315         if (get_user(blocks, arg) ||
1316             get_user(length, arg+1) ||
1317             get_user(flags, arg+2)) {
1318                 return (-EFAULT);
1319         }
1320
1321         (void) idefloppy_get_sfrp_bit(drive);
1322         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1323         if (idefloppy_queue_pc_tail(drive, &pc)) {
1324                 return (-EIO);
1325         }
1326
1327         return (0);
1328 }
1329
1330 /*
1331 ** Get ATAPI_FORMAT_UNIT progress indication.
1332 **
1333 ** Userland gives a pointer to an int.  The int is set to a progress
1334 ** indicator 0-65536, with 65536=100%.
1335 **
1336 ** If the drive does not support format progress indication, we just check
1337 ** the dsc bit, and return either 0 or 65536.
1338 */
1339
1340 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1341 {
1342         idefloppy_floppy_t *floppy = drive->driver_data;
1343         idefloppy_pc_t pc;
1344         int progress_indication = 0x10000;
1345
1346         if (floppy->srfp) {
1347                 idefloppy_create_request_sense_cmd(&pc);
1348                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1349                         return (-EIO);
1350                 }
1351
1352                 if (floppy->sense_key == 2 &&
1353                     floppy->asc == 4 &&
1354                     floppy->ascq == 4) {
1355                         progress_indication = floppy->progress_indication;
1356                 }
1357                 /* Else assume format_unit has finished, and we're
1358                 ** at 0x10000 */
1359         } else {
1360                 unsigned long flags;
1361                 u8 stat;
1362
1363                 local_irq_save(flags);
1364                 stat = drive->hwif->INB(IDE_STATUS_REG);
1365                 local_irq_restore(flags);
1366
1367                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1368         }
1369         if (put_user(progress_indication, arg))
1370                 return (-EFAULT);
1371
1372         return (0);
1373 }
1374
1375 /*
1376  *      Return the current floppy capacity.
1377  */
1378 static sector_t idefloppy_capacity (ide_drive_t *drive)
1379 {
1380         idefloppy_floppy_t *floppy = drive->driver_data;
1381         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1382
1383         return capacity;
1384 }
1385
1386 /*
1387  *      idefloppy_identify_device checks if we can support a drive,
1388  *      based on the ATAPI IDENTIFY command results.
1389  */
1390 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1391 {
1392         struct idefloppy_id_gcw gcw;
1393 #if IDEFLOPPY_DEBUG_INFO
1394         char buffer[80];
1395 #endif /* IDEFLOPPY_DEBUG_INFO */
1396
1397         *((u16 *) &gcw) = id->config;
1398
1399 #ifdef CONFIG_PPC
1400         /* kludge for Apple PowerBook internal zip */
1401         if ((gcw.device_type == 5) &&
1402             !strstr(id->model, "CD-ROM") &&
1403             strstr(id->model, "ZIP"))
1404                 gcw.device_type = 0;
1405 #endif
1406
1407 #if IDEFLOPPY_DEBUG_INFO
1408         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1409         switch (gcw.protocol) {
1410                 case 0: case 1: sprintf(buffer, "ATA");break;
1411                 case 2: sprintf(buffer, "ATAPI");break;
1412                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1413         }
1414         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1415         switch (gcw.device_type) {
1416                 case 0: sprintf(buffer, "Direct-access Device");break;
1417                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1418                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1419                 case 5: sprintf(buffer, "CD-ROM Device");break;
1420                 case 6: sprintf(buffer, "Reserved");
1421                 case 7: sprintf(buffer, "Optical memory Device");break;
1422                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1423                 default: sprintf(buffer, "Reserved");
1424         }
1425         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1426         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1427         switch (gcw.drq_type) {
1428                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1429                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1430                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1431                 case 3: sprintf(buffer, "Reserved");break;
1432         }
1433         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1434         switch (gcw.packet_size) {
1435                 case 0: sprintf(buffer, "12 bytes");break;
1436                 case 1: sprintf(buffer, "16 bytes");break;
1437                 default: sprintf(buffer, "Reserved");break;
1438         }
1439         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1440 #endif /* IDEFLOPPY_DEBUG_INFO */
1441
1442         if (gcw.protocol != 2)
1443                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1444         else if (gcw.device_type != 0)
1445                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1446         else if (!gcw.removable)
1447                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1448         else if (gcw.drq_type == 3) {
1449                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1450         } else if (gcw.packet_size != 0) {
1451                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1452         } else
1453                 return 1;
1454         return 0;
1455 }
1456
1457 #ifdef CONFIG_IDE_PROC_FS
1458 static void idefloppy_add_settings(ide_drive_t *drive)
1459 {
1460         idefloppy_floppy_t *floppy = drive->driver_data;
1461
1462 /*
1463  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1464  */
1465         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1466         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1467         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1468         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1469 }
1470 #else
1471 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1472 #endif
1473
1474 /*
1475  *      Driver initialization.
1476  */
1477 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1478 {
1479         struct idefloppy_id_gcw gcw;
1480
1481         *((u16 *) &gcw) = drive->id->config;
1482         floppy->pc = floppy->pc_stack;
1483         if (gcw.drq_type == 1)
1484                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1485         /*
1486          *      We used to check revisions here. At this point however
1487          *      I'm giving up. Just assume they are all broken, its easier.
1488          *
1489          *      The actual reason for the workarounds was likely
1490          *      a driver bug after all rather than a firmware bug,
1491          *      and the workaround below used to hide it. It should
1492          *      be fixed as of version 1.9, but to be on the safe side
1493          *      we'll leave the limitation below for the 2.2.x tree.
1494          */
1495
1496         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1497                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1498                 /* This value will be visible in the /proc/ide/hdx/settings */
1499                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1500                 blk_queue_max_sectors(drive->queue, 64);
1501         }
1502
1503         /*
1504         *      Guess what?  The IOMEGA Clik! drive also needs the
1505         *      above fix.  It makes nasty clicking noises without
1506         *      it, so please don't remove this.
1507         */
1508         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1509                 blk_queue_max_sectors(drive->queue, 64);
1510                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1511         }
1512
1513
1514         (void) ide_floppy_get_capacity(drive);
1515         idefloppy_add_settings(drive);
1516 }
1517
1518 static void ide_floppy_remove(ide_drive_t *drive)
1519 {
1520         idefloppy_floppy_t *floppy = drive->driver_data;
1521         struct gendisk *g = floppy->disk;
1522
1523         ide_proc_unregister_driver(drive, floppy->driver);
1524
1525         del_gendisk(g);
1526
1527         ide_floppy_put(floppy);
1528 }
1529
1530 static void idefloppy_cleanup_obj(struct kref *kref)
1531 {
1532         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1533         ide_drive_t *drive = floppy->drive;
1534         struct gendisk *g = floppy->disk;
1535
1536         drive->driver_data = NULL;
1537         g->private_data = NULL;
1538         put_disk(g);
1539         kfree(floppy);
1540 }
1541
1542 #ifdef CONFIG_IDE_PROC_FS
1543 static int proc_idefloppy_read_capacity
1544         (char *page, char **start, off_t off, int count, int *eof, void *data)
1545 {
1546         ide_drive_t*drive = (ide_drive_t *)data;
1547         int len;
1548
1549         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1550         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1551 }
1552
1553 static ide_proc_entry_t idefloppy_proc[] = {
1554         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1555         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1556         { NULL, 0, NULL, NULL }
1557 };
1558 #endif  /* CONFIG_IDE_PROC_FS */
1559
1560 static int ide_floppy_probe(ide_drive_t *);
1561
1562 static ide_driver_t idefloppy_driver = {
1563         .gen_driver = {
1564                 .owner          = THIS_MODULE,
1565                 .name           = "ide-floppy",
1566                 .bus            = &ide_bus_type,
1567         },
1568         .probe                  = ide_floppy_probe,
1569         .remove                 = ide_floppy_remove,
1570         .version                = IDEFLOPPY_VERSION,
1571         .media                  = ide_floppy,
1572         .supports_dsc_overlap   = 0,
1573         .do_request             = idefloppy_do_request,
1574         .end_request            = idefloppy_do_end_request,
1575         .error                  = __ide_error,
1576         .abort                  = __ide_abort,
1577 #ifdef CONFIG_IDE_PROC_FS
1578         .proc                   = idefloppy_proc,
1579 #endif
1580 };
1581
1582 static int idefloppy_open(struct inode *inode, struct file *filp)
1583 {
1584         struct gendisk *disk = inode->i_bdev->bd_disk;
1585         struct ide_floppy_obj *floppy;
1586         ide_drive_t *drive;
1587         idefloppy_pc_t pc;
1588         int ret = 0;
1589
1590         debug_log("Reached %s\n", __func__);
1591
1592         if (!(floppy = ide_floppy_get(disk)))
1593                 return -ENXIO;
1594
1595         drive = floppy->drive;
1596
1597         floppy->openers++;
1598
1599         if (floppy->openers == 1) {
1600                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1601                 /* Just in case */
1602
1603                 idefloppy_create_test_unit_ready_cmd(&pc);
1604                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1605                         idefloppy_create_start_stop_cmd(&pc, 1);
1606                         (void) idefloppy_queue_pc_tail(drive, &pc);
1607                 }
1608
1609                 if (ide_floppy_get_capacity(drive)
1610                    && (filp->f_flags & O_NDELAY) == 0
1611                     /*
1612                     ** Allow O_NDELAY to open a drive without a disk, or with
1613                     ** an unreadable disk, so that we can get the format
1614                     ** capacity of the drive or begin the format - Sam
1615                     */
1616                     ) {
1617                         ret = -EIO;
1618                         goto out_put_floppy;
1619                 }
1620
1621                 if (floppy->wp && (filp->f_mode & 2)) {
1622                         ret = -EROFS;
1623                         goto out_put_floppy;
1624                 }
1625                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1626                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1627                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1628                         idefloppy_create_prevent_cmd(&pc, 1);
1629                         (void) idefloppy_queue_pc_tail(drive, &pc);
1630                 }
1631                 check_disk_change(inode->i_bdev);
1632         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1633                 ret = -EBUSY;
1634                 goto out_put_floppy;
1635         }
1636         return 0;
1637
1638 out_put_floppy:
1639         floppy->openers--;
1640         ide_floppy_put(floppy);
1641         return ret;
1642 }
1643
1644 static int idefloppy_release(struct inode *inode, struct file *filp)
1645 {
1646         struct gendisk *disk = inode->i_bdev->bd_disk;
1647         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1648         ide_drive_t *drive = floppy->drive;
1649         idefloppy_pc_t pc;
1650
1651         debug_log("Reached %s\n", __func__);
1652
1653         if (floppy->openers == 1) {
1654                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1655                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1656                         idefloppy_create_prevent_cmd(&pc, 0);
1657                         (void) idefloppy_queue_pc_tail(drive, &pc);
1658                 }
1659
1660                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1661         }
1662
1663         floppy->openers--;
1664
1665         ide_floppy_put(floppy);
1666
1667         return 0;
1668 }
1669
1670 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1671 {
1672         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1673         ide_drive_t *drive = floppy->drive;
1674
1675         geo->heads = drive->bios_head;
1676         geo->sectors = drive->bios_sect;
1677         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1678         return 0;
1679 }
1680
1681 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1682                         unsigned int cmd, unsigned long arg)
1683 {
1684         struct block_device *bdev = inode->i_bdev;
1685         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1686         ide_drive_t *drive = floppy->drive;
1687         void __user *argp = (void __user *)arg;
1688         int err;
1689         int prevent = (arg) ? 1 : 0;
1690         idefloppy_pc_t pc;
1691
1692         switch (cmd) {
1693         case CDROMEJECT:
1694                 prevent = 0;
1695                 /* fall through */
1696         case CDROM_LOCKDOOR:
1697                 if (floppy->openers > 1)
1698                         return -EBUSY;
1699
1700                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
1701                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1702                         idefloppy_create_prevent_cmd(&pc, prevent);
1703                         (void) idefloppy_queue_pc_tail(drive, &pc);
1704                 }
1705                 if (cmd == CDROMEJECT) {
1706                         idefloppy_create_start_stop_cmd(&pc, 2);
1707                         (void) idefloppy_queue_pc_tail(drive, &pc);
1708                 }
1709                 return 0;
1710         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1711                 return 0;
1712         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1713                 return ide_floppy_get_format_capacities(drive, argp);
1714         case IDEFLOPPY_IOCTL_FORMAT_START:
1715
1716                 if (!(file->f_mode & 2))
1717                         return -EPERM;
1718
1719                 if (floppy->openers > 1) {
1720                         /* Don't format if someone is using the disk */
1721
1722                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1723                                   &floppy->flags);
1724                         return -EBUSY;
1725                 }
1726
1727                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1728
1729                 err = idefloppy_begin_format(drive, argp);
1730                 if (err)
1731                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1732                 return err;
1733                 /*
1734                 ** Note, the bit will be cleared when the device is
1735                 ** closed.  This is the cleanest way to handle the
1736                 ** situation where the drive does not support
1737                 ** format progress reporting.
1738                 */
1739         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1740                 return idefloppy_get_format_progress(drive, argp);
1741         }
1742
1743         /*
1744          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1745          * and CDROM_SEND_PACKET (legacy) ioctls
1746          */
1747         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1748                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1749                                         bdev->bd_disk, cmd, argp);
1750         else
1751                 err = -ENOTTY;
1752
1753         if (err == -ENOTTY)
1754                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1755
1756         return err;
1757 }
1758
1759 static int idefloppy_media_changed(struct gendisk *disk)
1760 {
1761         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1762         ide_drive_t *drive = floppy->drive;
1763
1764         /* do not scan partitions twice if this is a removable device */
1765         if (drive->attach) {
1766                 drive->attach = 0;
1767                 return 0;
1768         }
1769         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1770 }
1771
1772 static int idefloppy_revalidate_disk(struct gendisk *disk)
1773 {
1774         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1775         set_capacity(disk, idefloppy_capacity(floppy->drive));
1776         return 0;
1777 }
1778
1779 static struct block_device_operations idefloppy_ops = {
1780         .owner          = THIS_MODULE,
1781         .open           = idefloppy_open,
1782         .release        = idefloppy_release,
1783         .ioctl          = idefloppy_ioctl,
1784         .getgeo         = idefloppy_getgeo,
1785         .media_changed  = idefloppy_media_changed,
1786         .revalidate_disk= idefloppy_revalidate_disk
1787 };
1788
1789 static int ide_floppy_probe(ide_drive_t *drive)
1790 {
1791         idefloppy_floppy_t *floppy;
1792         struct gendisk *g;
1793
1794         if (!strstr("ide-floppy", drive->driver_req))
1795                 goto failed;
1796         if (!drive->present)
1797                 goto failed;
1798         if (drive->media != ide_floppy)
1799                 goto failed;
1800         if (!idefloppy_identify_device (drive, drive->id)) {
1801                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1802                 goto failed;
1803         }
1804         if (drive->scsi) {
1805                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1806                 goto failed;
1807         }
1808         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1809                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1810                 goto failed;
1811         }
1812
1813         g = alloc_disk(1 << PARTN_BITS);
1814         if (!g)
1815                 goto out_free_floppy;
1816
1817         ide_init_disk(g, drive);
1818
1819         ide_proc_register_driver(drive, &idefloppy_driver);
1820
1821         kref_init(&floppy->kref);
1822
1823         floppy->drive = drive;
1824         floppy->driver = &idefloppy_driver;
1825         floppy->disk = g;
1826
1827         g->private_data = &floppy->driver;
1828
1829         drive->driver_data = floppy;
1830
1831         idefloppy_setup (drive, floppy);
1832
1833         g->minors = 1 << PARTN_BITS;
1834         g->driverfs_dev = &drive->gendev;
1835         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1836         g->fops = &idefloppy_ops;
1837         drive->attach = 1;
1838         add_disk(g);
1839         return 0;
1840
1841 out_free_floppy:
1842         kfree(floppy);
1843 failed:
1844         return -ENODEV;
1845 }
1846
1847 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1848
1849 static void __exit idefloppy_exit (void)
1850 {
1851         driver_unregister(&idefloppy_driver.gen_driver);
1852 }
1853
1854 static int __init idefloppy_init(void)
1855 {
1856         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1857         return driver_register(&idefloppy_driver.gen_driver);
1858 }
1859
1860 MODULE_ALIAS("ide:*m-floppy*");
1861 module_init(idefloppy_init);
1862 module_exit(idefloppy_exit);
1863 MODULE_LICENSE("GPL");