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 /*
 123  *      Format capacity
 124  */
 125 typedef struct {
 126         u8              reserved[3];
 127         u8              length;                 /* Length of the following descriptors in bytes */
 128 } idefloppy_capacity_header_t;
 129
 130 typedef struct {
 131         u32             blocks;                 /* Number of blocks */
 132 #if defined(__LITTLE_ENDIAN_BITFIELD)
 133         unsigned        dc              :2;     /* Descriptor Code */
 134         unsigned        reserved        :6;
 135 #elif defined(__BIG_ENDIAN_BITFIELD)
 136         unsigned        reserved        :6;
 137         unsigned        dc              :2;     /* Descriptor Code */
 138 #else
 139 #error "Bitfield endianness not defined! Check your byteorder.h"
 140 #endif
 141         u8              length_msb;             /* Block Length (MSB)*/
 142         u16             length;                 /* Block Length */
 143 } idefloppy_capacity_descriptor_t;
 144
 145 #define CAPACITY_INVALID        0x00
 146 #define CAPACITY_UNFORMATTED    0x01
 147 #define CAPACITY_CURRENT        0x02
 148 #define CAPACITY_NO_CARTRIDGE   0x03
 149
 150 /*
 151  *      Most of our global data which we need to save even as we leave the
 152  *      driver due to an interrupt or a timer event is stored in a variable
 153  *      of type idefloppy_floppy_t, defined below.
 154  */
 155 typedef struct ide_floppy_obj {
 156         ide_drive_t     *drive;
 157         ide_driver_t    *driver;
 158         struct gendisk  *disk;
 159         struct kref     kref;
 160         unsigned int    openers;        /* protected by BKL for now */
 161
 162         /* Current packet command */
 163         idefloppy_pc_t *pc;
 164         /* Last failed packet command */
 165         idefloppy_pc_t *failed_pc;
 166         /* Packet command stack */
 167         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 168         /* Next free packet command storage space */
 169         int pc_stack_index;
 170         struct request rq_stack[IDEFLOPPY_PC_STACK];
 171         /* We implement a circular array */
 172         int rq_stack_index;
 173
 174         /*
 175          *      Last error information
 176          */
 177         u8 sense_key, asc, ascq;
 178         /* delay this long before sending packet command */
 179         u8 ticks;
 180         int progress_indication;
 181
 182         /*
 183          *      Device information
 184          */
 185         /* Current format */
 186         int blocks, block_size, bs_factor;
 187         /* Last format capacity */
 188         idefloppy_capacity_descriptor_t capacity;
 189         /* Copy of the flexible disk page */
 190         u8 flexible_disk_page[32];
 191         /* Write protect */
 192         int wp;
 193         /* Supports format progress report */
 194         int srfp;
 195         /* Status/Action flags */
 196         unsigned long flags;
 197 } idefloppy_floppy_t;
 198
 199 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 200
 201 /*
 202  *      Floppy flag bits values.
 203  */
 204 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 205 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 206 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 207 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 208 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 209 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 210
 211 /*
 212  *      Defines for the mode sense command
 213  */
 214 #define MODE_SENSE_CURRENT              0x00
 215 #define MODE_SENSE_CHANGEABLE           0x01
 216 #define MODE_SENSE_DEFAULT              0x02
 217 #define MODE_SENSE_SAVED                0x03
 218
 219 /*
 220  *      IOCTLs used in low-level formatting.
 221  */
 222
 223 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 224 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 225 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 226 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 227
 228 /*
 229  *      Error codes which are returned in rq->errors to the higher part
 230  *      of the driver.
 231  */
 232 #define IDEFLOPPY_ERROR_GENERAL         101
 233
 234 /*
 235  *      The following is used to format the general configuration word of
 236  *      the ATAPI IDENTIFY DEVICE command.
 237  */
 238 struct idefloppy_id_gcw {
 239 #if defined(__LITTLE_ENDIAN_BITFIELD)
 240         unsigned packet_size            :2;     /* Packet Size */
 241         unsigned reserved234            :3;     /* Reserved */
 242         unsigned drq_type               :2;     /* Command packet DRQ type */
 243         unsigned removable              :1;     /* Removable media */
 244         unsigned device_type            :5;     /* Device type */
 245         unsigned reserved13             :1;     /* Reserved */
 246         unsigned protocol               :2;     /* Protocol type */
 247 #elif defined(__BIG_ENDIAN_BITFIELD)
 248         unsigned protocol               :2;     /* Protocol type */
 249         unsigned reserved13             :1;     /* Reserved */
 250         unsigned device_type            :5;     /* Device type */
 251         unsigned removable              :1;     /* Removable media */
 252         unsigned drq_type               :2;     /* Command packet DRQ type */
 253         unsigned reserved234            :3;     /* Reserved */
 254         unsigned packet_size            :2;     /* Packet Size */
 255 #else
 256 #error "Bitfield endianness not defined! Check your byteorder.h"
 257 #endif
 258 };
 259
 260 /*
 261  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 262  * See SFF-8070i spec.
 263  */
 264 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 265 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 266
 267 static DEFINE_MUTEX(idefloppy_ref_mutex);
 268
 269 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 270
 271 #define ide_floppy_g(disk) \
 272         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 273
 274 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 275 {
 276         struct ide_floppy_obj *floppy = NULL;
 277
 278         mutex_lock(&idefloppy_ref_mutex);
 279         floppy = ide_floppy_g(disk);
 280         if (floppy)
 281                 kref_get(&floppy->kref);
 282         mutex_unlock(&idefloppy_ref_mutex);
 283         return floppy;
 284 }
 285
 286 static void idefloppy_cleanup_obj(struct kref *);
 287
 288 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 289 {
 290         mutex_lock(&idefloppy_ref_mutex);
 291         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 292         mutex_unlock(&idefloppy_ref_mutex);
 293 }
 294
 295 /*
 296  *      Too bad. The drive wants to send us data which we are not ready to accept.
 297  *      Just throw it away.
 298  */
 299 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 300 {
 301         while (bcount--)
 302                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 303 }
 304
 305 #if IDEFLOPPY_DEBUG_BUGS
 306 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
 307 {
 308         while (bcount--)
 309                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 310 }
 311 #endif /* IDEFLOPPY_DEBUG_BUGS */
 312
 313
 314 /*
 315  *      idefloppy_do_end_request is used to finish servicing a request.
 316  *
 317  *      For read/write requests, we will call ide_end_request to pass to the
 318  *      next buffer.
 319  */
 320 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 321 {
 322         idefloppy_floppy_t *floppy = drive->driver_data;
 323         struct request *rq = HWGROUP(drive)->rq;
 324         int error;
 325
 326         debug_log("Reached %s\n", __func__);
 327
 328         switch (uptodate) {
 329                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 330                 case 1: error = 0; break;
 331                 default: error = uptodate;
 332         }
 333         if (error)
 334                 floppy->failed_pc = NULL;
 335         /* Why does this happen? */
 336         if (!rq)
 337                 return 0;
 338         if (!blk_special_request(rq)) {
 339                 /* our real local end request function */
 340                 ide_end_request(drive, uptodate, nsecs);
 341                 return 0;
 342         }
 343         rq->errors = error;
 344         /* fixme: need to move this local also */
 345         ide_end_drive_cmd(drive, 0, 0);
 346         return 0;
 347 }
 348
 349 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 350 {
 351         struct request *rq = pc->rq;
 352         struct bio_vec *bvec;
 353         struct req_iterator iter;
 354         unsigned long flags;
 355         char *data;
 356         int count, done = 0;
 357
 358         rq_for_each_segment(bvec, rq, iter) {
 359                 if (!bcount)
 360                         break;
 361
 362                 count = min(bvec->bv_len, bcount);
 363
 364                 data = bvec_kmap_irq(bvec, &flags);
 365                 drive->hwif->atapi_input_bytes(drive, data, count);
 366                 bvec_kunmap_irq(data, &flags);
 367
 368                 bcount -= count;
 369                 pc->b_count += count;
 370                 done += count;
 371         }
 372
 373         idefloppy_do_end_request(drive, 1, done >> 9);
 374
 375         if (bcount) {
 376                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
 377                 idefloppy_discard_data(drive, bcount);
 378         }
 379 }
 380
 381 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
 382 {
 383         struct request *rq = pc->rq;
 384         struct req_iterator iter;
 385         struct bio_vec *bvec;
 386         unsigned long flags;
 387         int count, done = 0;
 388         char *data;
 389
 390         rq_for_each_segment(bvec, rq, iter) {
 391                 if (!bcount)
 392                         break;
 393
 394                 count = min(bvec->bv_len, bcount);
 395
 396                 data = bvec_kmap_irq(bvec, &flags);
 397                 drive->hwif->atapi_output_bytes(drive, data, count);
 398                 bvec_kunmap_irq(data, &flags);
 399
 400                 bcount -= count;
 401                 pc->b_count += count;
 402                 done += count;
 403         }
 404
 405         idefloppy_do_end_request(drive, 1, done >> 9);
 406
 407 #if IDEFLOPPY_DEBUG_BUGS
 408         if (bcount) {
 409                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
 410                 idefloppy_write_zeros(drive, bcount);
 411         }
 412 #endif
 413 }
 414
 415 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 416 {
 417         struct request *rq = pc->rq;
 418         struct bio *bio = rq->bio;
 419
 420         while ((bio = rq->bio) != NULL)
 421                 idefloppy_do_end_request(drive, 1, 0);
 422 }
 423
 424 /*
 425  *      idefloppy_queue_pc_head generates a new packet command request in front
 426  *      of the request queue, before the current request, so that it will be
 427  *      processed immediately, on the next pass through the driver.
 428  */
 429 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 430 {
 431         struct ide_floppy_obj *floppy = drive->driver_data;
 432
 433         ide_init_drive_cmd(rq);
 434         rq->buffer = (char *) pc;
 435         rq->cmd_type = REQ_TYPE_SPECIAL;
 436         rq->rq_disk = floppy->disk;
 437         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 438 }
 439
 440 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 441 {
 442         idefloppy_floppy_t *floppy = drive->driver_data;
 443
 444         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 445                 floppy->pc_stack_index=0;
 446         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 447 }
 448
 449 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 450 {
 451         idefloppy_floppy_t *floppy = drive->driver_data;
 452
 453         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 454                 floppy->rq_stack_index = 0;
 455         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 456 }
 457
 458 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 459 {
 460         idefloppy_floppy_t *floppy = drive->driver_data;
 461         u8 *buf = floppy->pc->buffer;
 462
 463         debug_log("Reached %s\n", __func__);
 464
 465         if (!floppy->pc->error) {
 466                 floppy->sense_key = buf[2] & 0x0F;
 467                 floppy->asc = buf[12];
 468                 floppy->ascq = buf[13];
 469                 floppy->progress_indication = buf[15] & 0x80 ?
 470                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 471
 472                 if (floppy->failed_pc)
 473                         debug_log("pc = %x, sense key = %x, asc = %x,"
 474                                         " ascq = %x\n",
 475                                         floppy->failed_pc->c[0],
 476                                         floppy->sense_key,
 477                                         floppy->asc,
 478                                         floppy->ascq);
 479                 else
 480                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 481                                         floppy->sense_key,
 482                                         floppy->asc,
 483                                         floppy->ascq);
 484
 485
 486                 idefloppy_do_end_request(drive, 1, 0);
 487         } else {
 488                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 489                                 " request!\n");
 490                 idefloppy_do_end_request(drive, 0, 0);
 491         }
 492 }
 493
 494 /*
 495  *      General packet command callback function.
 496  */
 497 static void idefloppy_pc_callback (ide_drive_t *drive)
 498 {
 499         idefloppy_floppy_t *floppy = drive->driver_data;
 500
 501         debug_log("Reached %s\n", __func__);
 502
 503         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 504 }
 505
 506 /*
 507  *      idefloppy_init_pc initializes a packet command.
 508  */
 509 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 510 {
 511         memset(pc->c, 0, 12);
 512         pc->retries = 0;
 513         pc->flags = 0;
 514         pc->request_transfer = 0;
 515         pc->buffer = pc->pc_buffer;
 516         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 517         pc->callback = &idefloppy_pc_callback;
 518 }
 519
 520 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 521 {
 522         idefloppy_init_pc(pc);
 523         pc->c[0] = GPCMD_REQUEST_SENSE;
 524         pc->c[4] = 255;
 525         pc->request_transfer = 18;
 526         pc->callback = &idefloppy_request_sense_callback;
 527 }
 528
 529 /*
 530  *      idefloppy_retry_pc is called when an error was detected during the
 531  *      last packet command. We queue a request sense packet command in
 532  *      the head of the request list.
 533  */
 534 static void idefloppy_retry_pc (ide_drive_t *drive)
 535 {
 536         idefloppy_pc_t *pc;
 537         struct request *rq;
 538
 539         (void)drive->hwif->INB(IDE_ERROR_REG);
 540         pc = idefloppy_next_pc_storage(drive);
 541         rq = idefloppy_next_rq_storage(drive);
 542         idefloppy_create_request_sense_cmd(pc);
 543         idefloppy_queue_pc_head(drive, pc, rq);
 544 }
 545
 546 /*
 547  *      idefloppy_pc_intr is the usual interrupt handler which will be called
 548  *      during a packet command.
 549  */
 550 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 551 {
 552         idefloppy_floppy_t *floppy = drive->driver_data;
 553         ide_hwif_t *hwif = drive->hwif;
 554         idefloppy_pc_t *pc = floppy->pc;
 555         struct request *rq = pc->rq;
 556         unsigned int temp;
 557         u16 bcount;
 558         u8 stat, ireason;
 559
 560         debug_log("Reached %s interrupt handler\n", __func__);
 561
 562         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 563                 if (HWIF(drive)->ide_dma_end(drive)) {
 564                         set_bit(PC_DMA_ERROR, &pc->flags);
 565                 } else {
 566                         pc->actually_transferred = pc->request_transfer;
 567                         idefloppy_update_buffers(drive, pc);
 568                 }
 569                 debug_log("DMA finished\n");
 570         }
 571
 572         /* Clear the interrupt */
 573         stat = drive->hwif->INB(IDE_STATUS_REG);
 574
 575         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 576                 debug_log("Packet command completed, %d bytes transferred\n",
 577                                 pc->actually_transferred);
 578                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 579
 580                 local_irq_enable_in_hardirq();
 581
 582                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 583                         /* Error detected */
 584                         debug_log("%s: I/O error\n", drive->name);
 585                         rq->errors++;
 586                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 587                                 printk(KERN_ERR "ide-floppy: I/O error in "
 588                                         "request sense command\n");
 589                                 return ide_do_reset(drive);
 590                         }
 591                         /* Retry operation */
 592                         idefloppy_retry_pc(drive);
 593                         /* queued, but not started */
 594                         return ide_stopped;
 595                 }
 596                 pc->error = 0;
 597                 if (floppy->failed_pc == pc)
 598                         floppy->failed_pc = NULL;
 599                 /* Command finished - Call the callback function */
 600                 pc->callback(drive);
 601                 return ide_stopped;
 602         }
 603
 604         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 605                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 606                         "more interrupts in DMA mode\n");
 607                 ide_dma_off(drive);
 608                 return ide_do_reset(drive);
 609         }
 610
 611         /* Get the number of bytes to transfer */
 612         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 613                   hwif->INB(IDE_BCOUNTL_REG);
 614         /* on this interrupt */
 615         ireason = hwif->INB(IDE_IREASON_REG);
 616
 617         if (ireason & CD) {
 618                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
 619                 return ide_do_reset(drive);
 620         }
 621         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 622                 /* Hopefully, we will never get here */
 623                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 624                                 (ireason & IO) ? "Write" : "Read");
 625                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 626                                 (ireason & IO) ? "Read" : "Write");
 627                 return ide_do_reset(drive);
 628         }
 629         if (!test_bit(PC_WRITING, &pc->flags)) {
 630                 /* Reading - Check that we have enough space */
 631                 temp = pc->actually_transferred + bcount;
 632                 if (temp > pc->request_transfer) {
 633                         if (temp > pc->buffer_size) {
 634                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 635                                         "to send us more data than expected "
 636                                         "- discarding data\n");
 637                                 idefloppy_discard_data(drive, bcount);
 638
 639                                 ide_set_handler(drive,
 640                                                 &idefloppy_pc_intr,
 641                                                 IDEFLOPPY_WAIT_CMD,
 642                                                 NULL);
 643                                 return ide_started;
 644                         }
 645                         debug_log("The floppy wants to send us more data than"
 646                                         " expected - allowing transfer\n");
 647                 }
 648         }
 649         if (test_bit(PC_WRITING, &pc->flags)) {
 650                 if (pc->buffer != NULL)
 651                         /* Write the current buffer */
 652                         hwif->atapi_output_bytes(drive, pc->current_position,
 653                                                  bcount);
 654                 else
 655                         idefloppy_output_buffers(drive, pc, bcount);
 656         } else {
 657                 if (pc->buffer != NULL)
 658                         /* Read the current buffer */
 659                         hwif->atapi_input_bytes(drive, pc->current_position,
 660                                                 bcount);
 661                 else
 662                         idefloppy_input_buffers(drive, pc, bcount);
 663         }
 664         /* Update the current position */
 665         pc->actually_transferred += bcount;
 666         pc->current_position += bcount;
 667
 668         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
 669         return ide_started;
 670 }
 671
 672 /*
 673  * This is the original routine that did the packet transfer.
 674  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 675  * for that drive below. The algorithm is chosen based on drive type
 676  */
 677 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 678 {
 679         ide_startstop_t startstop;
 680         idefloppy_floppy_t *floppy = drive->driver_data;
 681         u8 ireason;
 682
 683         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 684                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 685                                 "initiated yet DRQ isn't asserted\n");
 686                 return startstop;
 687         }
 688         ireason = drive->hwif->INB(IDE_IREASON_REG);
 689         if ((ireason & CD) == 0 || (ireason & IO)) {
 690                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 691                                 "issuing a packet command\n");
 692                 return ide_do_reset(drive);
 693         }
 694
 695         /* Set the interrupt routine */
 696         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 697         /* Send the actual packet */
 698         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 699         return ide_started;
 700 }
 701
 702
 703 /*
 704  * What we have here is a classic case of a top half / bottom half
 705  * interrupt service routine. In interrupt mode, the device sends
 706  * an interrupt to signal it's ready to receive a packet. However,
 707  * we need to delay about 2-3 ticks before issuing the packet or we
 708  * gets in trouble.
 709  *
 710  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 711  * directly). In either case, when the device says it's ready for a
 712  * packet, we schedule the packet transfer to occur about 2-3 ticks
 713  * later in transfer_pc2.
 714  */
 715 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 716 {
 717         idefloppy_floppy_t *floppy = drive->driver_data;
 718
 719         /* Send the actual packet */
 720         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 721         /* Timeout for the packet command */
 722         return IDEFLOPPY_WAIT_CMD;
 723 }
 724
 725 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 726 {
 727         idefloppy_floppy_t *floppy = drive->driver_data;
 728         ide_startstop_t startstop;
 729         u8 ireason;
 730
 731         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 732                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 733                                 "initiated yet DRQ isn't asserted\n");
 734                 return startstop;
 735         }
 736         ireason = drive->hwif->INB(IDE_IREASON_REG);
 737         if ((ireason & CD) == 0 || (ireason & IO)) {
 738                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 739                                 "while issuing a packet command\n");
 740                 return ide_do_reset(drive);
 741         }
 742         /*
 743          * The following delay solves a problem with ATAPI Zip 100 drives
 744          * where the Busy flag was apparently being deasserted before the
 745          * unit was ready to receive data. This was happening on a
 746          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 747          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 748          * used until after the packet is moved in about 50 msec.
 749          */
 750
 751         ide_set_handler(drive,
 752           &idefloppy_pc_intr,           /* service routine for packet command */
 753           floppy->ticks,                /* wait this long before "failing" */
 754           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 755         return ide_started;
 756 }
 757
 758 /**
 759  * idefloppy_should_report_error()
 760  *
 761  * Supresses error messages resulting from Medium not present
 762  */
 763 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
 764 {
 765         if (floppy->sense_key == 0x02 &&
 766             floppy->asc       == 0x3a &&
 767             floppy->ascq      == 0x00)
 768                 return 0;
 769         return 1;
 770 }
 771
 772 /*
 773  *      Issue a packet command
 774  */
 775 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 776 {
 777         idefloppy_floppy_t *floppy = drive->driver_data;
 778         ide_hwif_t *hwif = drive->hwif;
 779         ide_handler_t *pkt_xfer_routine;
 780         u16 bcount;
 781         u8 dma;
 782
 783         if (floppy->failed_pc == NULL &&
 784             pc->c[0] != GPCMD_REQUEST_SENSE)
 785                 floppy->failed_pc = pc;
 786         /* Set the current packet command */
 787         floppy->pc = pc;
 788
 789         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
 790             test_bit(PC_ABORT, &pc->flags)) {
 791                 /*
 792                  *      We will "abort" retrying a packet command in case
 793                  *      a legitimate error code was received.
 794                  */
 795                 if (!test_bit(PC_ABORT, &pc->flags)) {
 796                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
 797                                 if (idefloppy_should_report_error(floppy))
 798                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
 799                                                "pc = %2x, key = %2x, "
 800                                                "asc = %2x, ascq = %2x\n",
 801                                                drive->name, pc->c[0],
 802                                                floppy->sense_key,
 803                                                floppy->asc, floppy->ascq);
 804                         }
 805                         /* Giving up */
 806                         pc->error = IDEFLOPPY_ERROR_GENERAL;
 807                 }
 808                 floppy->failed_pc = NULL;
 809                 pc->callback(drive);
 810                 return ide_stopped;
 811         }
 812
 813         debug_log("Retry number - %d\n", pc->retries);
 814
 815         pc->retries++;
 816         /* We haven't transferred any data yet */
 817         pc->actually_transferred = 0;
 818         pc->current_position = pc->buffer;
 819         bcount = min(pc->request_transfer, 63 * 1024);
 820
 821         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 822                 ide_dma_off(drive);
 823
 824         dma = 0;
 825
 826         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 827                 dma = !hwif->dma_setup(drive);
 828
 829         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 830                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 831
 832         if (dma) {      /* Begin DMA, if necessary */
 833                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 834                 hwif->dma_start(drive);
 835         }
 836
 837         /* Can we transfer the packet when we get the interrupt or wait? */
 838         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
 839                 /* wait */
 840                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 841         } else {
 842                 /* immediate */
 843                 pkt_xfer_routine = &idefloppy_transfer_pc;
 844         }
 845
 846         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
 847                 /* Issue the packet command */
 848                 ide_execute_command(drive, WIN_PACKETCMD,
 849                                 pkt_xfer_routine,
 850                                 IDEFLOPPY_WAIT_CMD,
 851                                 NULL);
 852                 return ide_started;
 853         } else {
 854                 /* Issue the packet command */
 855                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 856                 return (*pkt_xfer_routine) (drive);
 857         }
 858 }
 859
 860 static void idefloppy_rw_callback (ide_drive_t *drive)
 861 {
 862         debug_log("Reached %s\n", __func__);
 863
 864         idefloppy_do_end_request(drive, 1, 0);
 865         return;
 866 }
 867
 868 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 869 {
 870         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 871
 872         idefloppy_init_pc(pc);
 873         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 874         pc->c[4] = prevent;
 875 }
 876
 877 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 878 {
 879         idefloppy_init_pc(pc);
 880         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 881         pc->c[7] = 255;
 882         pc->c[8] = 255;
 883         pc->request_transfer = 255;
 884 }
 885
 886 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 887                                               int flags)
 888 {
 889         idefloppy_init_pc(pc);
 890         pc->c[0] = GPCMD_FORMAT_UNIT;
 891         pc->c[1] = 0x17;
 892
 893         memset(pc->buffer, 0, 12);
 894         pc->buffer[1] = 0xA2;
 895         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 896
 897         if (flags & 1)                          /* Verify bit on... */
 898                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 899         pc->buffer[3] = 8;
 900
 901         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 902         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 903         pc->buffer_size=12;
 904         set_bit(PC_WRITING, &pc->flags);
 905 }
 906
 907 /*
 908  *      A mode sense command is used to "sense" floppy parameters.
 909  */
 910 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 911 {
 912         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 913
 914         idefloppy_init_pc(pc);
 915         pc->c[0] = GPCMD_MODE_SENSE_10;
 916         pc->c[1] = 0;
 917         pc->c[2] = page_code + (type << 6);
 918
 919         switch (page_code) {
 920                 case IDEFLOPPY_CAPABILITIES_PAGE:
 921                         length += 12;
 922                         break;
 923                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 924                         length += 32;
 925                         break;
 926                 default:
 927                         printk(KERN_ERR "ide-floppy: unsupported page code "
 928                                 "in create_mode_sense_cmd\n");
 929         }
 930         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 931         pc->request_transfer = length;
 932 }
 933
 934 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 935 {
 936         idefloppy_init_pc(pc);
 937         pc->c[0] = GPCMD_START_STOP_UNIT;
 938         pc->c[4] = start;
 939 }
 940
 941 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 942 {
 943         idefloppy_init_pc(pc);
 944         pc->c[0] = GPCMD_TEST_UNIT_READY;
 945 }
 946
 947 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
 948 {
 949         int block = sector / floppy->bs_factor;
 950         int blocks = rq->nr_sectors / floppy->bs_factor;
 951         int cmd = rq_data_dir(rq);
 952
 953         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
 954                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
 955                 block, blocks);
 956
 957         idefloppy_init_pc(pc);
 958         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
 959                 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12;
 960                 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]);
 961         } else {
 962                 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 963                 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 964         }
 965         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 966         pc->callback = &idefloppy_rw_callback;
 967         pc->rq = rq;
 968         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 969         if (rq->cmd_flags & REQ_RW)
 970                 set_bit(PC_WRITING, &pc->flags);
 971         pc->buffer = NULL;
 972         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 973         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 974 }
 975
 976 static void
 977 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 978 {
 979         idefloppy_init_pc(pc);
 980         pc->callback = &idefloppy_rw_callback;
 981         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 982         pc->rq = rq;
 983         pc->b_count = rq->data_len;
 984         if (rq->data_len && rq_data_dir(rq) == WRITE)
 985                 set_bit(PC_WRITING, &pc->flags);
 986         pc->buffer = rq->data;
 987         if (rq->bio)
 988                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 989
 990         /*
 991          * possibly problematic, doesn't look like ide-floppy correctly
 992          * handled scattered requests if dma fails...
 993          */
 994         pc->request_transfer = pc->buffer_size = rq->data_len;
 995 }
 996
 997 /*
 998  *      idefloppy_do_request is our request handling function.
 999  */
1000 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1001 {
1002         idefloppy_floppy_t *floppy = drive->driver_data;
1003         idefloppy_pc_t *pc;
1004         unsigned long block = (unsigned long)block_s;
1005
1006         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
1007                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1008                         rq->cmd_type, rq->errors);
1009         debug_log("sector: %ld, nr_sectors: %ld, "
1010                         "current_nr_sectors: %d\n", (long)rq->sector,
1011                         rq->nr_sectors, rq->current_nr_sectors);
1012
1013         if (rq->errors >= ERROR_MAX) {
1014                 if (floppy->failed_pc != NULL) {
1015                         if (idefloppy_should_report_error(floppy))
1016                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1017                                        " key = %2x, asc = %2x, ascq = %2x\n",
1018                                        drive->name, floppy->failed_pc->c[0],
1019                                        floppy->sense_key, floppy->asc, floppy->ascq);
1020                 }
1021                 else
1022                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1023                                 drive->name);
1024                 idefloppy_do_end_request(drive, 0, 0);
1025                 return ide_stopped;
1026         }
1027         if (blk_fs_request(rq)) {
1028                 if (((long)rq->sector % floppy->bs_factor) ||
1029                     (rq->nr_sectors % floppy->bs_factor)) {
1030                         printk("%s: unsupported r/w request size\n",
1031                                 drive->name);
1032                         idefloppy_do_end_request(drive, 0, 0);
1033                         return ide_stopped;
1034                 }
1035                 pc = idefloppy_next_pc_storage(drive);
1036                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1037         } else if (blk_special_request(rq)) {
1038                 pc = (idefloppy_pc_t *) rq->buffer;
1039         } else if (blk_pc_request(rq)) {
1040                 pc = idefloppy_next_pc_storage(drive);
1041                 idefloppy_blockpc_cmd(floppy, pc, rq);
1042         } else {
1043                 blk_dump_rq_flags(rq,
1044                         "ide-floppy: unsupported command in queue");
1045                 idefloppy_do_end_request(drive, 0, 0);
1046                 return ide_stopped;
1047         }
1048
1049         pc->rq = rq;
1050         return idefloppy_issue_pc(drive, pc);
1051 }
1052
1053 /*
1054  *      idefloppy_queue_pc_tail adds a special packet command request to the
1055  *      tail of the request queue, and waits for it to be serviced.
1056  */
1057 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1058 {
1059         struct ide_floppy_obj *floppy = drive->driver_data;
1060         struct request rq;
1061
1062         ide_init_drive_cmd (&rq);
1063         rq.buffer = (char *) pc;
1064         rq.cmd_type = REQ_TYPE_SPECIAL;
1065         rq.rq_disk = floppy->disk;
1066
1067         return ide_do_drive_cmd(drive, &rq, ide_wait);
1068 }
1069
1070 /*
1071  * Look at the flexible disk page parameters. We ignore the CHS capacity
1072  * parameters and use the LBA parameters instead.
1073  */
1074 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1075 {
1076         idefloppy_floppy_t *floppy = drive->driver_data;
1077         idefloppy_pc_t pc;
1078         u8 *page;
1079         int capacity, lba_capacity;
1080         u16 transfer_rate, sector_size, cyls, rpm;
1081         u8 heads, sectors;
1082
1083         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1084                                         MODE_SENSE_CURRENT);
1085
1086         if (idefloppy_queue_pc_tail(drive, &pc)) {
1087                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1088                                 " parameters\n");
1089                 return 1;
1090         }
1091         floppy->wp = !!(pc.buffer[3] & 0x80);
1092         set_disk_ro(floppy->disk, floppy->wp);
1093         page = &pc.buffer[8];
1094
1095         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1096         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1097         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1098         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1099         heads         = pc.buffer[8 + 4];
1100         sectors       = pc.buffer[8 + 5];
1101
1102         capacity = cyls * heads * sectors * sector_size;
1103
1104         if (memcmp(page, &floppy->flexible_disk_page, 32))
1105                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1106                                 "%d sector size, %d rpm\n",
1107                                 drive->name, capacity / 1024, cyls, heads,
1108                                 sectors, transfer_rate / 8, sector_size, rpm);
1109
1110         memcpy(&floppy->flexible_disk_page, page, 32);
1111         drive->bios_cyl = cyls;
1112         drive->bios_head = heads;
1113         drive->bios_sect = sectors;
1114         lba_capacity = floppy->blocks * floppy->block_size;
1115
1116         if (capacity < lba_capacity) {
1117                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1118                         "bytes, but the drive only handles %d\n",
1119                         drive->name, lba_capacity, capacity);
1120                 floppy->blocks = floppy->block_size ?
1121                         capacity / floppy->block_size : 0;
1122         }
1123         return 0;
1124 }
1125
1126 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1127 {
1128         idefloppy_floppy_t *floppy = drive->driver_data;
1129         idefloppy_pc_t pc;
1130
1131         floppy->srfp = 0;
1132         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1133                                                  MODE_SENSE_CURRENT);
1134
1135         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1136         if (idefloppy_queue_pc_tail(drive, &pc))
1137                 return 1;
1138
1139         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1140         return (0);
1141 }
1142
1143 /*
1144  *      Determine if a media is present in the floppy drive, and if so,
1145  *      its LBA capacity.
1146  */
1147 static int idefloppy_get_capacity (ide_drive_t *drive)
1148 {
1149         idefloppy_floppy_t *floppy = drive->driver_data;
1150         idefloppy_pc_t pc;
1151         idefloppy_capacity_header_t *header;
1152         idefloppy_capacity_descriptor_t *descriptor;
1153         int i, descriptors, rc = 1, blocks, length;
1154
1155         drive->bios_cyl = 0;
1156         drive->bios_head = drive->bios_sect = 0;
1157         floppy->blocks = 0;
1158         floppy->bs_factor = 1;
1159         set_capacity(floppy->disk, 0);
1160
1161         idefloppy_create_read_capacity_cmd(&pc);
1162         if (idefloppy_queue_pc_tail(drive, &pc)) {
1163                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1164                 return 1;
1165         }
1166         header = (idefloppy_capacity_header_t *) pc.buffer;
1167         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1168         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1169
1170         for (i = 0; i < descriptors; i++, descriptor++) {
1171                 blocks = descriptor->blocks = be32_to_cpu(descriptor->blocks);
1172                 length = descriptor->length = be16_to_cpu(descriptor->length);
1173
1174                 if (!i)
1175                 {
1176                 switch (descriptor->dc) {
1177                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1178                 case CAPACITY_UNFORMATTED:
1179                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1180                                 /*
1181                                  * If it is not a clik drive, break out
1182                                  * (maintains previous driver behaviour)
1183                                  */
1184                                 break;
1185                 case CAPACITY_CURRENT:
1186                         /* Normal Zip/LS-120 disks */
1187                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1188                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1189                                         "sector size\n", drive->name,
1190                                         blocks * length / 1024, blocks, length);
1191                         floppy->capacity = *descriptor;
1192                         if (!length || length % 512) {
1193                                 printk(KERN_NOTICE "%s: %d bytes block size "
1194                                         "not supported\n", drive->name, length);
1195                         } else {
1196                                 floppy->blocks = blocks;
1197                                 floppy->block_size = length;
1198                                 if ((floppy->bs_factor = length / 512) != 1)
1199                                         printk(KERN_NOTICE "%s: warning: non "
1200                                                 "512 bytes block size not "
1201                                                 "fully supported\n",
1202                                                 drive->name);
1203                                 rc = 0;
1204                         }
1205                         break;
1206                 case CAPACITY_NO_CARTRIDGE:
1207                         /*
1208                          * This is a KERN_ERR so it appears on screen
1209                          * for the user to see
1210                          */
1211                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1212                         break;
1213                 case CAPACITY_INVALID:
1214                         printk(KERN_ERR "%s: Invalid capacity for disk "
1215                                 "in drive\n", drive->name);
1216                         break;
1217                 }
1218                 }
1219                 if (!i) {
1220                         debug_log("Descriptor 0 Code: %d\n", descriptor->dc);
1221                 }
1222                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1223                                 i, blocks * length / 1024, blocks, length);
1224         }
1225
1226         /* Clik! disk does not support get_flexible_disk_page */
1227         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1228                 (void) ide_floppy_get_flexible_disk_page(drive);
1229         }
1230
1231         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1232         return rc;
1233 }
1234
1235 /*
1236 ** Obtain the list of formattable capacities.
1237 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1238 ** descriptors to userland, instead of our own structures.
1239 **
1240 ** Userland gives us the following structure:
1241 **
1242 ** struct idefloppy_format_capacities {
1243 **        int nformats;
1244 **        struct {
1245 **                int nblocks;
1246 **                int blocksize;
1247 **                } formats[];
1248 **        } ;
1249 **
1250 ** userland initializes nformats to the number of allocated formats[]
1251 ** records.  On exit we set nformats to the number of records we've
1252 ** actually initialized.
1253 **
1254 */
1255
1256 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1257 {
1258         idefloppy_pc_t pc;
1259         idefloppy_capacity_header_t *header;
1260         idefloppy_capacity_descriptor_t *descriptor;
1261         int i, descriptors, blocks, length;
1262         int u_array_size;
1263         int u_index;
1264         int __user *argp;
1265
1266         if (get_user(u_array_size, arg))
1267                 return (-EFAULT);
1268
1269         if (u_array_size <= 0)
1270                 return (-EINVAL);
1271
1272         idefloppy_create_read_capacity_cmd(&pc);
1273         if (idefloppy_queue_pc_tail(drive, &pc)) {
1274                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1275                 return (-EIO);
1276         }
1277         header = (idefloppy_capacity_header_t *) pc.buffer;
1278         descriptors = header->length /
1279                 sizeof(idefloppy_capacity_descriptor_t);
1280         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1281
1282         u_index = 0;
1283         argp = arg + 1;
1284
1285         /*
1286         ** We always skip the first capacity descriptor.  That's the
1287         ** current capacity.  We are interested in the remaining descriptors,
1288         ** the formattable capacities.
1289         */
1290
1291         for (i=0; i<descriptors; i++, descriptor++) {
1292                 if (u_index >= u_array_size)
1293                         break;  /* User-supplied buffer too small */
1294                 if (i == 0)
1295                         continue;       /* Skip the first descriptor */
1296
1297                 blocks = be32_to_cpu(descriptor->blocks);
1298                 length = be16_to_cpu(descriptor->length);
1299
1300                 if (put_user(blocks, argp))
1301                         return(-EFAULT);
1302                 ++argp;
1303
1304                 if (put_user(length, argp))
1305                         return (-EFAULT);
1306                 ++argp;
1307
1308                 ++u_index;
1309         }
1310
1311         if (put_user(u_index, arg))
1312                 return (-EFAULT);
1313         return (0);
1314 }
1315
1316 /*
1317 ** Send ATAPI_FORMAT_UNIT to the drive.
1318 **
1319 ** Userland gives us the following structure:
1320 **
1321 ** struct idefloppy_format_command {
1322 **        int nblocks;
1323 **        int blocksize;
1324 **        int flags;
1325 **        } ;
1326 **
1327 ** flags is a bitmask, currently, the only defined flag is:
1328 **
1329 **        0x01 - verify media after format.
1330 */
1331
1332 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1333 {
1334         int blocks;
1335         int length;
1336         int flags;
1337         idefloppy_pc_t pc;
1338
1339         if (get_user(blocks, arg) ||
1340             get_user(length, arg+1) ||
1341             get_user(flags, arg+2)) {
1342                 return (-EFAULT);
1343         }
1344
1345         (void) idefloppy_get_sfrp_bit(drive);
1346         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1347         if (idefloppy_queue_pc_tail(drive, &pc)) {
1348                 return (-EIO);
1349         }
1350
1351         return (0);
1352 }
1353
1354 /*
1355 ** Get ATAPI_FORMAT_UNIT progress indication.
1356 **
1357 ** Userland gives a pointer to an int.  The int is set to a progress
1358 ** indicator 0-65536, with 65536=100%.
1359 **
1360 ** If the drive does not support format progress indication, we just check
1361 ** the dsc bit, and return either 0 or 65536.
1362 */
1363
1364 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1365 {
1366         idefloppy_floppy_t *floppy = drive->driver_data;
1367         idefloppy_pc_t pc;
1368         int progress_indication = 0x10000;
1369
1370         if (floppy->srfp) {
1371                 idefloppy_create_request_sense_cmd(&pc);
1372                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1373                         return (-EIO);
1374                 }
1375
1376                 if (floppy->sense_key == 2 &&
1377                     floppy->asc == 4 &&
1378                     floppy->ascq == 4) {
1379                         progress_indication = floppy->progress_indication;
1380                 }
1381                 /* Else assume format_unit has finished, and we're
1382                 ** at 0x10000 */
1383         } else {
1384                 unsigned long flags;
1385                 u8 stat;
1386
1387                 local_irq_save(flags);
1388                 stat = drive->hwif->INB(IDE_STATUS_REG);
1389                 local_irq_restore(flags);
1390
1391                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1392         }
1393         if (put_user(progress_indication, arg))
1394                 return (-EFAULT);
1395
1396         return (0);
1397 }
1398
1399 /*
1400  *      Return the current floppy capacity.
1401  */
1402 static sector_t idefloppy_capacity (ide_drive_t *drive)
1403 {
1404         idefloppy_floppy_t *floppy = drive->driver_data;
1405         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1406
1407         return capacity;
1408 }
1409
1410 /*
1411  *      idefloppy_identify_device checks if we can support a drive,
1412  *      based on the ATAPI IDENTIFY command results.
1413  */
1414 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1415 {
1416         struct idefloppy_id_gcw gcw;
1417 #if IDEFLOPPY_DEBUG_INFO
1418         char buffer[80];
1419 #endif /* IDEFLOPPY_DEBUG_INFO */
1420
1421         *((u16 *) &gcw) = id->config;
1422
1423 #ifdef CONFIG_PPC
1424         /* kludge for Apple PowerBook internal zip */
1425         if ((gcw.device_type == 5) &&
1426             !strstr(id->model, "CD-ROM") &&
1427             strstr(id->model, "ZIP"))
1428                 gcw.device_type = 0;
1429 #endif
1430
1431 #if IDEFLOPPY_DEBUG_INFO
1432         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1433         switch (gcw.protocol) {
1434                 case 0: case 1: sprintf(buffer, "ATA");break;
1435                 case 2: sprintf(buffer, "ATAPI");break;
1436                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1437         }
1438         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1439         switch (gcw.device_type) {
1440                 case 0: sprintf(buffer, "Direct-access Device");break;
1441                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1442                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1443                 case 5: sprintf(buffer, "CD-ROM Device");break;
1444                 case 6: sprintf(buffer, "Reserved");
1445                 case 7: sprintf(buffer, "Optical memory Device");break;
1446                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1447                 default: sprintf(buffer, "Reserved");
1448         }
1449         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1450         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1451         switch (gcw.drq_type) {
1452                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1453                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1454                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1455                 case 3: sprintf(buffer, "Reserved");break;
1456         }
1457         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1458         switch (gcw.packet_size) {
1459                 case 0: sprintf(buffer, "12 bytes");break;
1460                 case 1: sprintf(buffer, "16 bytes");break;
1461                 default: sprintf(buffer, "Reserved");break;
1462         }
1463         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1464 #endif /* IDEFLOPPY_DEBUG_INFO */
1465
1466         if (gcw.protocol != 2)
1467                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1468         else if (gcw.device_type != 0)
1469                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1470         else if (!gcw.removable)
1471                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1472         else if (gcw.drq_type == 3) {
1473                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1474         } else if (gcw.packet_size != 0) {
1475                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1476         } else
1477                 return 1;
1478         return 0;
1479 }
1480
1481 #ifdef CONFIG_IDE_PROC_FS
1482 static void idefloppy_add_settings(ide_drive_t *drive)
1483 {
1484         idefloppy_floppy_t *floppy = drive->driver_data;
1485
1486 /*
1487  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1488  */
1489         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1490         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1491         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1492         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1493 }
1494 #else
1495 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1496 #endif
1497
1498 /*
1499  *      Driver initialization.
1500  */
1501 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1502 {
1503         struct idefloppy_id_gcw gcw;
1504
1505         *((u16 *) &gcw) = drive->id->config;
1506         floppy->pc = floppy->pc_stack;
1507         if (gcw.drq_type == 1)
1508                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1509         /*
1510          *      We used to check revisions here. At this point however
1511          *      I'm giving up. Just assume they are all broken, its easier.
1512          *
1513          *      The actual reason for the workarounds was likely
1514          *      a driver bug after all rather than a firmware bug,
1515          *      and the workaround below used to hide it. It should
1516          *      be fixed as of version 1.9, but to be on the safe side
1517          *      we'll leave the limitation below for the 2.2.x tree.
1518          */
1519
1520         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1521                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1522                 /* This value will be visible in the /proc/ide/hdx/settings */
1523                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1524                 blk_queue_max_sectors(drive->queue, 64);
1525         }
1526
1527         /*
1528         *      Guess what?  The IOMEGA Clik! drive also needs the
1529         *      above fix.  It makes nasty clicking noises without
1530         *      it, so please don't remove this.
1531         */
1532         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1533                 blk_queue_max_sectors(drive->queue, 64);
1534                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1535         }
1536
1537
1538         (void) idefloppy_get_capacity(drive);
1539         idefloppy_add_settings(drive);
1540 }
1541
1542 static void ide_floppy_remove(ide_drive_t *drive)
1543 {
1544         idefloppy_floppy_t *floppy = drive->driver_data;
1545         struct gendisk *g = floppy->disk;
1546
1547         ide_proc_unregister_driver(drive, floppy->driver);
1548
1549         del_gendisk(g);
1550
1551         ide_floppy_put(floppy);
1552 }
1553
1554 static void idefloppy_cleanup_obj(struct kref *kref)
1555 {
1556         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1557         ide_drive_t *drive = floppy->drive;
1558         struct gendisk *g = floppy->disk;
1559
1560         drive->driver_data = NULL;
1561         g->private_data = NULL;
1562         put_disk(g);
1563         kfree(floppy);
1564 }
1565
1566 #ifdef CONFIG_IDE_PROC_FS
1567 static int proc_idefloppy_read_capacity
1568         (char *page, char **start, off_t off, int count, int *eof, void *data)
1569 {
1570         ide_drive_t*drive = (ide_drive_t *)data;
1571         int len;
1572
1573         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1574         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1575 }
1576
1577 static ide_proc_entry_t idefloppy_proc[] = {
1578         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1579         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1580         { NULL, 0, NULL, NULL }
1581 };
1582 #endif  /* CONFIG_IDE_PROC_FS */
1583
1584 static int ide_floppy_probe(ide_drive_t *);
1585
1586 static ide_driver_t idefloppy_driver = {
1587         .gen_driver = {
1588                 .owner          = THIS_MODULE,
1589                 .name           = "ide-floppy",
1590                 .bus            = &ide_bus_type,
1591         },
1592         .probe                  = ide_floppy_probe,
1593         .remove                 = ide_floppy_remove,
1594         .version                = IDEFLOPPY_VERSION,
1595         .media                  = ide_floppy,
1596         .supports_dsc_overlap   = 0,
1597         .do_request             = idefloppy_do_request,
1598         .end_request            = idefloppy_do_end_request,
1599         .error                  = __ide_error,
1600         .abort                  = __ide_abort,
1601 #ifdef CONFIG_IDE_PROC_FS
1602         .proc                   = idefloppy_proc,
1603 #endif
1604 };
1605
1606 static int idefloppy_open(struct inode *inode, struct file *filp)
1607 {
1608         struct gendisk *disk = inode->i_bdev->bd_disk;
1609         struct ide_floppy_obj *floppy;
1610         ide_drive_t *drive;
1611         idefloppy_pc_t pc;
1612         int ret = 0;
1613
1614         debug_log("Reached %s\n", __func__);
1615
1616         if (!(floppy = ide_floppy_get(disk)))
1617                 return -ENXIO;
1618
1619         drive = floppy->drive;
1620
1621         floppy->openers++;
1622
1623         if (floppy->openers == 1) {
1624                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1625                 /* Just in case */
1626
1627                 idefloppy_create_test_unit_ready_cmd(&pc);
1628                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1629                         idefloppy_create_start_stop_cmd(&pc, 1);
1630                         (void) idefloppy_queue_pc_tail(drive, &pc);
1631                 }
1632
1633                 if (idefloppy_get_capacity (drive)
1634                    && (filp->f_flags & O_NDELAY) == 0
1635                     /*
1636                     ** Allow O_NDELAY to open a drive without a disk, or with
1637                     ** an unreadable disk, so that we can get the format
1638                     ** capacity of the drive or begin the format - Sam
1639                     */
1640                     ) {
1641                         ret = -EIO;
1642                         goto out_put_floppy;
1643                 }
1644
1645                 if (floppy->wp && (filp->f_mode & 2)) {
1646                         ret = -EROFS;
1647                         goto out_put_floppy;
1648                 }
1649                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1650                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1651                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1652                         idefloppy_create_prevent_cmd(&pc, 1);
1653                         (void) idefloppy_queue_pc_tail(drive, &pc);
1654                 }
1655                 check_disk_change(inode->i_bdev);
1656         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1657                 ret = -EBUSY;
1658                 goto out_put_floppy;
1659         }
1660         return 0;
1661
1662 out_put_floppy:
1663         floppy->openers--;
1664         ide_floppy_put(floppy);
1665         return ret;
1666 }
1667
1668 static int idefloppy_release(struct inode *inode, struct file *filp)
1669 {
1670         struct gendisk *disk = inode->i_bdev->bd_disk;
1671         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1672         ide_drive_t *drive = floppy->drive;
1673         idefloppy_pc_t pc;
1674
1675         debug_log("Reached %s\n", __func__);
1676
1677         if (floppy->openers == 1) {
1678                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1679                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1680                         idefloppy_create_prevent_cmd(&pc, 0);
1681                         (void) idefloppy_queue_pc_tail(drive, &pc);
1682                 }
1683
1684                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1685         }
1686
1687         floppy->openers--;
1688
1689         ide_floppy_put(floppy);
1690
1691         return 0;
1692 }
1693
1694 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1695 {
1696         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1697         ide_drive_t *drive = floppy->drive;
1698
1699         geo->heads = drive->bios_head;
1700         geo->sectors = drive->bios_sect;
1701         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1702         return 0;
1703 }
1704
1705 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1706                         unsigned int cmd, unsigned long arg)
1707 {
1708         struct block_device *bdev = inode->i_bdev;
1709         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1710         ide_drive_t *drive = floppy->drive;
1711         void __user *argp = (void __user *)arg;
1712         int err;
1713         int prevent = (arg) ? 1 : 0;
1714         idefloppy_pc_t pc;
1715
1716         switch (cmd) {
1717         case CDROMEJECT:
1718                 prevent = 0;
1719                 /* fall through */
1720         case CDROM_LOCKDOOR:
1721                 if (floppy->openers > 1)
1722                         return -EBUSY;
1723
1724                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
1725                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1726                         idefloppy_create_prevent_cmd(&pc, prevent);
1727                         (void) idefloppy_queue_pc_tail(drive, &pc);
1728                 }
1729                 if (cmd == CDROMEJECT) {
1730                         idefloppy_create_start_stop_cmd(&pc, 2);
1731                         (void) idefloppy_queue_pc_tail(drive, &pc);
1732                 }
1733                 return 0;
1734         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1735                 return 0;
1736         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1737                 return idefloppy_get_format_capacities(drive, argp);
1738         case IDEFLOPPY_IOCTL_FORMAT_START:
1739
1740                 if (!(file->f_mode & 2))
1741                         return -EPERM;
1742
1743                 if (floppy->openers > 1) {
1744                         /* Don't format if someone is using the disk */
1745
1746                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1747                                   &floppy->flags);
1748                         return -EBUSY;
1749                 }
1750
1751                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1752
1753                 err = idefloppy_begin_format(drive, argp);
1754                 if (err)
1755                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1756                 return err;
1757                 /*
1758                 ** Note, the bit will be cleared when the device is
1759                 ** closed.  This is the cleanest way to handle the
1760                 ** situation where the drive does not support
1761                 ** format progress reporting.
1762                 */
1763         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1764                 return idefloppy_get_format_progress(drive, argp);
1765         }
1766
1767         /*
1768          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1769          * and CDROM_SEND_PACKET (legacy) ioctls
1770          */
1771         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1772                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1773                                         bdev->bd_disk, cmd, argp);
1774         else
1775                 err = -ENOTTY;
1776
1777         if (err == -ENOTTY)
1778                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1779
1780         return err;
1781 }
1782
1783 static int idefloppy_media_changed(struct gendisk *disk)
1784 {
1785         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1786         ide_drive_t *drive = floppy->drive;
1787
1788         /* do not scan partitions twice if this is a removable device */
1789         if (drive->attach) {
1790                 drive->attach = 0;
1791                 return 0;
1792         }
1793         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1794 }
1795
1796 static int idefloppy_revalidate_disk(struct gendisk *disk)
1797 {
1798         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1799         set_capacity(disk, idefloppy_capacity(floppy->drive));
1800         return 0;
1801 }
1802
1803 static struct block_device_operations idefloppy_ops = {
1804         .owner          = THIS_MODULE,
1805         .open           = idefloppy_open,
1806         .release        = idefloppy_release,
1807         .ioctl          = idefloppy_ioctl,
1808         .getgeo         = idefloppy_getgeo,
1809         .media_changed  = idefloppy_media_changed,
1810         .revalidate_disk= idefloppy_revalidate_disk
1811 };
1812
1813 static int ide_floppy_probe(ide_drive_t *drive)
1814 {
1815         idefloppy_floppy_t *floppy;
1816         struct gendisk *g;
1817
1818         if (!strstr("ide-floppy", drive->driver_req))
1819                 goto failed;
1820         if (!drive->present)
1821                 goto failed;
1822         if (drive->media != ide_floppy)
1823                 goto failed;
1824         if (!idefloppy_identify_device (drive, drive->id)) {
1825                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1826                 goto failed;
1827         }
1828         if (drive->scsi) {
1829                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1830                 goto failed;
1831         }
1832         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1833                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1834                 goto failed;
1835         }
1836
1837         g = alloc_disk(1 << PARTN_BITS);
1838         if (!g)
1839                 goto out_free_floppy;
1840
1841         ide_init_disk(g, drive);
1842
1843         ide_proc_register_driver(drive, &idefloppy_driver);
1844
1845         kref_init(&floppy->kref);
1846
1847         floppy->drive = drive;
1848         floppy->driver = &idefloppy_driver;
1849         floppy->disk = g;
1850
1851         g->private_data = &floppy->driver;
1852
1853         drive->driver_data = floppy;
1854
1855         idefloppy_setup (drive, floppy);
1856
1857         g->minors = 1 << PARTN_BITS;
1858         g->driverfs_dev = &drive->gendev;
1859         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1860         g->fops = &idefloppy_ops;
1861         drive->attach = 1;
1862         add_disk(g);
1863         return 0;
1864
1865 out_free_floppy:
1866         kfree(floppy);
1867 failed:
1868         return -ENODEV;
1869 }
1870
1871 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1872
1873 static void __exit idefloppy_exit (void)
1874 {
1875         driver_unregister(&idefloppy_driver.gen_driver);
1876 }
1877
1878 static int __init idefloppy_init(void)
1879 {
1880         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1881         return driver_register(&idefloppy_driver.gen_driver);
1882 }
1883
1884 MODULE_ALIAS("ide:*m-floppy*");
1885 module_init(idefloppy_init);
1886 module_exit(idefloppy_exit);
1887 MODULE_LICENSE("GPL");