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
  56 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  57 #define IDEFLOPPY_DEBUG( fmt, args... )
  58
  59 #if IDEFLOPPY_DEBUG_LOG
  60 #define debug_log(fmt, args...) \
  61         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  62 #else
  63 #define debug_log(fmt, args... ) do {} while(0)
  64 #endif
  65
  66
  67 /*
  68  *      Some drives require a longer irq timeout.
  69  */
  70 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  71
  72 /*
  73  *      After each failed packet command we issue a request sense command
  74  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  75  */
  76 #define IDEFLOPPY_MAX_PC_RETRIES        3
  77
  78 /*
  79  *      With each packet command, we allocate a buffer of
  80  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
  81  */
  82 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  83
  84 /*
  85  *      In various places in the driver, we need to allocate storage
  86  *      for packet commands and requests, which will remain valid while
  87  *      we leave the driver to wait for an interrupt or a timeout event.
  88  */
  89 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  90
  91 /*
  92  *      Our view of a packet command.
  93  */
  94 typedef struct idefloppy_packet_command_s {
  95         u8 c[12];                               /* Actual packet bytes */
  96         int retries;                            /* On each retry, we increment retries */
  97         int error;                              /* Error code */
  98         int request_transfer;                   /* Bytes to transfer */
  99         int actually_transferred;               /* Bytes actually transferred */
 100         int buffer_size;                        /* Size of our data buffer */
 101         int b_count;                            /* Missing/Available data on the current buffer */
 102         struct request *rq;                     /* The corresponding request */
 103         u8 *buffer;                             /* Data buffer */
 104         u8 *current_position;                   /* Pointer into the above buffer */
 105         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 106         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 107         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 108 } idefloppy_pc_t;
 109
 110 /*
 111  *      Packet command flag bits.
 112  */
 113 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
 114 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
 115 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
 116 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
 117 #define PC_WRITING                      5       /* Data direction */
 118
 119 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
 120
 121 /* format capacities descriptor codes */
 122 #define CAPACITY_INVALID        0x00
 123 #define CAPACITY_UNFORMATTED    0x01
 124 #define CAPACITY_CURRENT        0x02
 125 #define CAPACITY_NO_CARTRIDGE   0x03
 126
 127 /*
 128  *      Most of our global data which we need to save even as we leave the
 129  *      driver due to an interrupt or a timer event is stored in a variable
 130  *      of type idefloppy_floppy_t, defined below.
 131  */
 132 typedef struct ide_floppy_obj {
 133         ide_drive_t     *drive;
 134         ide_driver_t    *driver;
 135         struct gendisk  *disk;
 136         struct kref     kref;
 137         unsigned int    openers;        /* protected by BKL for now */
 138
 139         /* Current packet command */
 140         idefloppy_pc_t *pc;
 141         /* Last failed packet command */
 142         idefloppy_pc_t *failed_pc;
 143         /* Packet command stack */
 144         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 145         /* Next free packet command storage space */
 146         int pc_stack_index;
 147         struct request rq_stack[IDEFLOPPY_PC_STACK];
 148         /* We implement a circular array */
 149         int rq_stack_index;
 150
 151         /*
 152          *      Last error information
 153          */
 154         u8 sense_key, asc, ascq;
 155         /* delay this long before sending packet command */
 156         u8 ticks;
 157         int progress_indication;
 158
 159         /*
 160          *      Device information
 161          */
 162         /* Current format */
 163         int blocks, block_size, bs_factor;
 164         /* Last format capacity descriptor */
 165         u8 cap_desc[8];
 166         /* Copy of the flexible disk page */
 167         u8 flexible_disk_page[32];
 168         /* Write protect */
 169         int wp;
 170         /* Supports format progress report */
 171         int srfp;
 172         /* Status/Action flags */
 173         unsigned long flags;
 174 } idefloppy_floppy_t;
 175
 176 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 177
 178 /*
 179  *      Floppy flag bits values.
 180  */
 181 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
 182 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
 183 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
 184 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
 185 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 186 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 187
 188 /*
 189  *      Defines for the mode sense command
 190  */
 191 #define MODE_SENSE_CURRENT              0x00
 192 #define MODE_SENSE_CHANGEABLE           0x01
 193 #define MODE_SENSE_DEFAULT              0x02
 194 #define MODE_SENSE_SAVED                0x03
 195
 196 /*
 197  *      IOCTLs used in low-level formatting.
 198  */
 199
 200 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 201 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 202 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 203 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 204
 205 /*
 206  *      Error codes which are returned in rq->errors to the higher part
 207  *      of the driver.
 208  */
 209 #define IDEFLOPPY_ERROR_GENERAL         101
 210
 211 /*
 212  *      The following is used to format the general configuration word of
 213  *      the ATAPI IDENTIFY DEVICE command.
 214  */
 215 struct idefloppy_id_gcw {
 216 #if defined(__LITTLE_ENDIAN_BITFIELD)
 217         unsigned packet_size            :2;     /* Packet Size */
 218         unsigned reserved234            :3;     /* Reserved */
 219         unsigned drq_type               :2;     /* Command packet DRQ type */
 220         unsigned removable              :1;     /* Removable media */
 221         unsigned device_type            :5;     /* Device type */
 222         unsigned reserved13             :1;     /* Reserved */
 223         unsigned protocol               :2;     /* Protocol type */
 224 #elif defined(__BIG_ENDIAN_BITFIELD)
 225         unsigned protocol               :2;     /* Protocol type */
 226         unsigned reserved13             :1;     /* Reserved */
 227         unsigned device_type            :5;     /* Device type */
 228         unsigned removable              :1;     /* Removable media */
 229         unsigned drq_type               :2;     /* Command packet DRQ type */
 230         unsigned reserved234            :3;     /* Reserved */
 231         unsigned packet_size            :2;     /* Packet Size */
 232 #else
 233 #error "Bitfield endianness not defined! Check your byteorder.h"
 234 #endif
 235 };
 236
 237 /*
 238  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 239  * See SFF-8070i spec.
 240  */
 241 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 242 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 243
 244 static DEFINE_MUTEX(idefloppy_ref_mutex);
 245
 246 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 247
 248 #define ide_floppy_g(disk) \
 249         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 250
 251 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 252 {
 253         struct ide_floppy_obj *floppy = NULL;
 254
 255         mutex_lock(&idefloppy_ref_mutex);
 256         floppy = ide_floppy_g(disk);
 257         if (floppy)
 258                 kref_get(&floppy->kref);
 259         mutex_unlock(&idefloppy_ref_mutex);
 260         return floppy;
 261 }
 262
 263 static void idefloppy_cleanup_obj(struct kref *);
 264
 265 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 266 {
 267         mutex_lock(&idefloppy_ref_mutex);
 268         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 269         mutex_unlock(&idefloppy_ref_mutex);
 270 }
 271
 272 /*
 273  *      Too bad. The drive wants to send us data which we are not ready to accept.
 274  *      Just throw it away.
 275  */
 276 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 277 {
 278         while (bcount--)
 279                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 280 }
 281
 282 static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
 283 {
 284         while (bcount--)
 285                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 286 }
 287
 288
 289 /*
 290  *      idefloppy_do_end_request is used to finish servicing a request.
 291  *
 292  *      For read/write requests, we will call ide_end_request to pass to the
 293  *      next buffer.
 294  */
 295 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 296 {
 297         idefloppy_floppy_t *floppy = drive->driver_data;
 298         struct request *rq = HWGROUP(drive)->rq;
 299         int error;
 300
 301         debug_log("Reached %s\n", __func__);
 302
 303         switch (uptodate) {
 304                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 305                 case 1: error = 0; break;
 306                 default: error = uptodate;
 307         }
 308         if (error)
 309                 floppy->failed_pc = NULL;
 310         /* Why does this happen? */
 311         if (!rq)
 312                 return 0;
 313         if (!blk_special_request(rq)) {
 314                 /* our real local end request function */
 315                 ide_end_request(drive, uptodate, nsecs);
 316                 return 0;
 317         }
 318         rq->errors = error;
 319         /* fixme: need to move this local also */
 320         ide_end_drive_cmd(drive, 0, 0);
 321         return 0;
 322 }
 323
 324 static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
 325                                   unsigned int bcount, int direction)
 326 {
 327         struct request *rq = pc->rq;
 328         struct req_iterator iter;
 329         struct bio_vec *bvec;
 330         unsigned long flags;
 331         int count, done = 0;
 332         char *data;
 333
 334         rq_for_each_segment(bvec, rq, iter) {
 335                 if (!bcount)
 336                         break;
 337
 338                 count = min(bvec->bv_len, bcount);
 339
 340                 data = bvec_kmap_irq(bvec, &flags);
 341                 if (direction)
 342                         drive->hwif->atapi_output_bytes(drive, data, count);
 343                 else
 344                         drive->hwif->atapi_input_bytes(drive, data, count);
 345                 bvec_kunmap_irq(data, &flags);
 346
 347                 bcount -= count;
 348                 pc->b_count += count;
 349                 done += count;
 350         }
 351
 352         idefloppy_do_end_request(drive, 1, done >> 9);
 353
 354         if (bcount) {
 355                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 356                                 drive->name, __func__, bcount);
 357                 if (direction)
 358                         idefloppy_write_zeros(drive, bcount);
 359                 else
 360                         idefloppy_discard_data(drive, bcount);
 361
 362         }
 363 }
 364
 365 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 366 {
 367         struct request *rq = pc->rq;
 368         struct bio *bio = rq->bio;
 369
 370         while ((bio = rq->bio) != NULL)
 371                 idefloppy_do_end_request(drive, 1, 0);
 372 }
 373
 374 /*
 375  *      idefloppy_queue_pc_head generates a new packet command request in front
 376  *      of the request queue, before the current request, so that it will be
 377  *      processed immediately, on the next pass through the driver.
 378  */
 379 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 380 {
 381         struct ide_floppy_obj *floppy = drive->driver_data;
 382
 383         ide_init_drive_cmd(rq);
 384         rq->buffer = (char *) pc;
 385         rq->cmd_type = REQ_TYPE_SPECIAL;
 386         rq->rq_disk = floppy->disk;
 387         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 388 }
 389
 390 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 391 {
 392         idefloppy_floppy_t *floppy = drive->driver_data;
 393
 394         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 395                 floppy->pc_stack_index=0;
 396         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 397 }
 398
 399 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 400 {
 401         idefloppy_floppy_t *floppy = drive->driver_data;
 402
 403         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 404                 floppy->rq_stack_index = 0;
 405         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 406 }
 407
 408 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 409 {
 410         idefloppy_floppy_t *floppy = drive->driver_data;
 411         u8 *buf = floppy->pc->buffer;
 412
 413         debug_log("Reached %s\n", __func__);
 414
 415         if (!floppy->pc->error) {
 416                 floppy->sense_key = buf[2] & 0x0F;
 417                 floppy->asc = buf[12];
 418                 floppy->ascq = buf[13];
 419                 floppy->progress_indication = buf[15] & 0x80 ?
 420                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 421
 422                 if (floppy->failed_pc)
 423                         debug_log("pc = %x, sense key = %x, asc = %x,"
 424                                         " ascq = %x\n",
 425                                         floppy->failed_pc->c[0],
 426                                         floppy->sense_key,
 427                                         floppy->asc,
 428                                         floppy->ascq);
 429                 else
 430                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 431                                         floppy->sense_key,
 432                                         floppy->asc,
 433                                         floppy->ascq);
 434
 435
 436                 idefloppy_do_end_request(drive, 1, 0);
 437         } else {
 438                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 439                                 " request!\n");
 440                 idefloppy_do_end_request(drive, 0, 0);
 441         }
 442 }
 443
 444 /*
 445  *      General packet command callback function.
 446  */
 447 static void idefloppy_pc_callback (ide_drive_t *drive)
 448 {
 449         idefloppy_floppy_t *floppy = drive->driver_data;
 450
 451         debug_log("Reached %s\n", __func__);
 452
 453         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 454 }
 455
 456 /*
 457  *      idefloppy_init_pc initializes a packet command.
 458  */
 459 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 460 {
 461         memset(pc->c, 0, 12);
 462         pc->retries = 0;
 463         pc->flags = 0;
 464         pc->request_transfer = 0;
 465         pc->buffer = pc->pc_buffer;
 466         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 467         pc->callback = &idefloppy_pc_callback;
 468 }
 469
 470 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 471 {
 472         idefloppy_init_pc(pc);
 473         pc->c[0] = GPCMD_REQUEST_SENSE;
 474         pc->c[4] = 255;
 475         pc->request_transfer = 18;
 476         pc->callback = &idefloppy_request_sense_callback;
 477 }
 478
 479 /*
 480  *      idefloppy_retry_pc is called when an error was detected during the
 481  *      last packet command. We queue a request sense packet command in
 482  *      the head of the request list.
 483  */
 484 static void idefloppy_retry_pc (ide_drive_t *drive)
 485 {
 486         idefloppy_pc_t *pc;
 487         struct request *rq;
 488
 489         (void)drive->hwif->INB(IDE_ERROR_REG);
 490         pc = idefloppy_next_pc_storage(drive);
 491         rq = idefloppy_next_rq_storage(drive);
 492         idefloppy_create_request_sense_cmd(pc);
 493         idefloppy_queue_pc_head(drive, pc, rq);
 494 }
 495
 496 /* The usual interrupt handler called during a packet command. */
 497 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 498 {
 499         idefloppy_floppy_t *floppy = drive->driver_data;
 500         ide_hwif_t *hwif = drive->hwif;
 501         idefloppy_pc_t *pc = floppy->pc;
 502         struct request *rq = pc->rq;
 503         xfer_func_t *xferfunc;
 504         unsigned int temp;
 505         int dma_error = 0;
 506         u16 bcount;
 507         u8 stat, ireason;
 508
 509         debug_log("Reached %s interrupt handler\n", __func__);
 510
 511         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 512                 dma_error = hwif->ide_dma_end(drive);
 513                 if (dma_error) {
 514                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 515                                         rq_data_dir(rq) ? "write" : "read");
 516                         set_bit(PC_DMA_ERROR, &pc->flags);
 517                 } else {
 518                         pc->actually_transferred = pc->request_transfer;
 519                         idefloppy_update_buffers(drive, pc);
 520                 }
 521                 debug_log("DMA finished\n");
 522         }
 523
 524         /* Clear the interrupt */
 525         stat = drive->hwif->INB(IDE_STATUS_REG);
 526
 527         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 528                 debug_log("Packet command completed, %d bytes transferred\n",
 529                                 pc->actually_transferred);
 530                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 531
 532                 local_irq_enable_in_hardirq();
 533
 534                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 535                         /* Error detected */
 536                         debug_log("%s: I/O error\n", drive->name);
 537                         rq->errors++;
 538                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 539                                 printk(KERN_ERR "ide-floppy: I/O error in "
 540                                         "request sense command\n");
 541                                 return ide_do_reset(drive);
 542                         }
 543                         /* Retry operation */
 544                         idefloppy_retry_pc(drive);
 545                         /* queued, but not started */
 546                         return ide_stopped;
 547                 }
 548                 pc->error = 0;
 549                 if (floppy->failed_pc == pc)
 550                         floppy->failed_pc = NULL;
 551                 /* Command finished - Call the callback function */
 552                 pc->callback(drive);
 553                 return ide_stopped;
 554         }
 555
 556         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 557                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 558                         "more interrupts in DMA mode\n");
 559                 ide_dma_off(drive);
 560                 return ide_do_reset(drive);
 561         }
 562
 563         /* Get the number of bytes to transfer */
 564         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 565                   hwif->INB(IDE_BCOUNTL_REG);
 566         /* on this interrupt */
 567         ireason = hwif->INB(IDE_IREASON_REG);
 568
 569         if (ireason & CD) {
 570                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 571                 return ide_do_reset(drive);
 572         }
 573         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 574                 /* Hopefully, we will never get here */
 575                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 576                                 (ireason & IO) ? "Write" : "Read");
 577                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 578                                 (ireason & IO) ? "Read" : "Write");
 579                 return ide_do_reset(drive);
 580         }
 581         if (!test_bit(PC_WRITING, &pc->flags)) {
 582                 /* Reading - Check that we have enough space */
 583                 temp = pc->actually_transferred + bcount;
 584                 if (temp > pc->request_transfer) {
 585                         if (temp > pc->buffer_size) {
 586                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 587                                         "to send us more data than expected "
 588                                         "- discarding data\n");
 589                                 idefloppy_discard_data(drive, bcount);
 590
 591                                 ide_set_handler(drive,
 592                                                 &idefloppy_pc_intr,
 593                                                 IDEFLOPPY_WAIT_CMD,
 594                                                 NULL);
 595                                 return ide_started;
 596                         }
 597                         debug_log("The floppy wants to send us more data than"
 598                                         " expected - allowing transfer\n");
 599                 }
 600         }
 601         if (test_bit(PC_WRITING, &pc->flags))
 602                 xferfunc = hwif->atapi_output_bytes;
 603         else
 604                 xferfunc = hwif->atapi_input_bytes;
 605
 606         if (pc->buffer)
 607                 xferfunc(drive, pc->current_position, bcount);
 608         else
 609                 ide_floppy_io_buffers(drive, pc, bcount,
 610                                       test_bit(PC_WRITING, &pc->flags));
 611
 612         /* Update the current position */
 613         pc->actually_transferred += bcount;
 614         pc->current_position += bcount;
 615
 616         /* And set the interrupt handler again */
 617         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 618         return ide_started;
 619 }
 620
 621 /*
 622  * This is the original routine that did the packet transfer.
 623  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 624  * for that drive below. The algorithm is chosen based on drive type
 625  */
 626 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 627 {
 628         ide_startstop_t startstop;
 629         idefloppy_floppy_t *floppy = drive->driver_data;
 630         u8 ireason;
 631
 632         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 633                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 634                                 "initiated yet DRQ isn't asserted\n");
 635                 return startstop;
 636         }
 637         ireason = drive->hwif->INB(IDE_IREASON_REG);
 638         if ((ireason & CD) == 0 || (ireason & IO)) {
 639                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 640                                 "issuing a packet command\n");
 641                 return ide_do_reset(drive);
 642         }
 643
 644         /* Set the interrupt routine */
 645         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 646         /* Send the actual packet */
 647         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 648         return ide_started;
 649 }
 650
 651
 652 /*
 653  * What we have here is a classic case of a top half / bottom half
 654  * interrupt service routine. In interrupt mode, the device sends
 655  * an interrupt to signal it's ready to receive a packet. However,
 656  * we need to delay about 2-3 ticks before issuing the packet or we
 657  * gets in trouble.
 658  *
 659  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 660  * directly). In either case, when the device says it's ready for a
 661  * packet, we schedule the packet transfer to occur about 2-3 ticks
 662  * later in transfer_pc2.
 663  */
 664 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 665 {
 666         idefloppy_floppy_t *floppy = drive->driver_data;
 667
 668         /* Send the actual packet */
 669         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 670         /* Timeout for the packet command */
 671         return IDEFLOPPY_WAIT_CMD;
 672 }
 673
 674 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 675 {
 676         idefloppy_floppy_t *floppy = drive->driver_data;
 677         ide_startstop_t startstop;
 678         u8 ireason;
 679
 680         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 681                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 682                                 "initiated yet DRQ isn't asserted\n");
 683                 return startstop;
 684         }
 685         ireason = drive->hwif->INB(IDE_IREASON_REG);
 686         if ((ireason & CD) == 0 || (ireason & IO)) {
 687                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 688                                 "while issuing a packet command\n");
 689                 return ide_do_reset(drive);
 690         }
 691         /*
 692          * The following delay solves a problem with ATAPI Zip 100 drives
 693          * where the Busy flag was apparently being deasserted before the
 694          * unit was ready to receive data. This was happening on a
 695          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 696          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 697          * used until after the packet is moved in about 50 msec.
 698          */
 699
 700         ide_set_handler(drive,
 701           &idefloppy_pc_intr,           /* service routine for packet command */
 702           floppy->ticks,                /* wait this long before "failing" */
 703           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 704         return ide_started;
 705 }
 706
 707 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 708                                     idefloppy_pc_t *pc)
 709 {
 710         /* supress error messages resulting from Medium not present */
 711         if (floppy->sense_key == 0x02 &&
 712             floppy->asc       == 0x3a &&
 713             floppy->ascq      == 0x00)
 714                 return;
 715
 716         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 717                         "asc = %2x, ascq = %2x\n",
 718                         floppy->drive->name, pc->c[0], floppy->sense_key,
 719                         floppy->asc, floppy->ascq);
 720
 721 }
 722
 723 /*
 724  *      Issue a packet command
 725  */
 726 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 727 {
 728         idefloppy_floppy_t *floppy = drive->driver_data;
 729         ide_hwif_t *hwif = drive->hwif;
 730         ide_handler_t *pkt_xfer_routine;
 731         u16 bcount;
 732         u8 dma;
 733
 734         if (floppy->failed_pc == NULL &&
 735             pc->c[0] != GPCMD_REQUEST_SENSE)
 736                 floppy->failed_pc = pc;
 737         /* Set the current packet command */
 738         floppy->pc = pc;
 739
 740         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
 741             test_bit(PC_ABORT, &pc->flags)) {
 742                 /*
 743                  *      We will "abort" retrying a packet command in case
 744                  *      a legitimate error code was received.
 745                  */
 746                 if (!test_bit(PC_ABORT, &pc->flags)) {
 747                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
 748                                 ide_floppy_report_error(floppy, pc);
 749                         /* Giving up */
 750                         pc->error = IDEFLOPPY_ERROR_GENERAL;
 751                 }
 752                 floppy->failed_pc = NULL;
 753                 pc->callback(drive);
 754                 return ide_stopped;
 755         }
 756
 757         debug_log("Retry number - %d\n", pc->retries);
 758
 759         pc->retries++;
 760         /* We haven't transferred any data yet */
 761         pc->actually_transferred = 0;
 762         pc->current_position = pc->buffer;
 763         bcount = min(pc->request_transfer, 63 * 1024);
 764
 765         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 766                 ide_dma_off(drive);
 767
 768         dma = 0;
 769
 770         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 771                 dma = !hwif->dma_setup(drive);
 772
 773         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 774                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 775
 776         if (dma) {      /* Begin DMA, if necessary */
 777                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 778                 hwif->dma_start(drive);
 779         }
 780
 781         /* Can we transfer the packet when we get the interrupt or wait? */
 782         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
 783                 /* wait */
 784                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 785         } else {
 786                 /* immediate */
 787                 pkt_xfer_routine = &idefloppy_transfer_pc;
 788         }
 789
 790         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
 791                 /* Issue the packet command */
 792                 ide_execute_command(drive, WIN_PACKETCMD,
 793                                 pkt_xfer_routine,
 794                                 IDEFLOPPY_WAIT_CMD,
 795                                 NULL);
 796                 return ide_started;
 797         } else {
 798                 /* Issue the packet command */
 799                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 800                 return (*pkt_xfer_routine) (drive);
 801         }
 802 }
 803
 804 static void idefloppy_rw_callback (ide_drive_t *drive)
 805 {
 806         debug_log("Reached %s\n", __func__);
 807
 808         idefloppy_do_end_request(drive, 1, 0);
 809         return;
 810 }
 811
 812 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 813 {
 814         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 815
 816         idefloppy_init_pc(pc);
 817         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 818         pc->c[4] = prevent;
 819 }
 820
 821 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 822 {
 823         idefloppy_init_pc(pc);
 824         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 825         pc->c[7] = 255;
 826         pc->c[8] = 255;
 827         pc->request_transfer = 255;
 828 }
 829
 830 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 831                                               int flags)
 832 {
 833         idefloppy_init_pc(pc);
 834         pc->c[0] = GPCMD_FORMAT_UNIT;
 835         pc->c[1] = 0x17;
 836
 837         memset(pc->buffer, 0, 12);
 838         pc->buffer[1] = 0xA2;
 839         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 840
 841         if (flags & 1)                          /* Verify bit on... */
 842                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 843         pc->buffer[3] = 8;
 844
 845         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 846         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 847         pc->buffer_size=12;
 848         set_bit(PC_WRITING, &pc->flags);
 849 }
 850
 851 /*
 852  *      A mode sense command is used to "sense" floppy parameters.
 853  */
 854 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 855 {
 856         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 857
 858         idefloppy_init_pc(pc);
 859         pc->c[0] = GPCMD_MODE_SENSE_10;
 860         pc->c[1] = 0;
 861         pc->c[2] = page_code + (type << 6);
 862
 863         switch (page_code) {
 864                 case IDEFLOPPY_CAPABILITIES_PAGE:
 865                         length += 12;
 866                         break;
 867                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 868                         length += 32;
 869                         break;
 870                 default:
 871                         printk(KERN_ERR "ide-floppy: unsupported page code "
 872                                 "in create_mode_sense_cmd\n");
 873         }
 874         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 875         pc->request_transfer = length;
 876 }
 877
 878 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 879 {
 880         idefloppy_init_pc(pc);
 881         pc->c[0] = GPCMD_START_STOP_UNIT;
 882         pc->c[4] = start;
 883 }
 884
 885 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 886 {
 887         idefloppy_init_pc(pc);
 888         pc->c[0] = GPCMD_TEST_UNIT_READY;
 889 }
 890
 891 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
 892 {
 893         int block = sector / floppy->bs_factor;
 894         int blocks = rq->nr_sectors / floppy->bs_factor;
 895         int cmd = rq_data_dir(rq);
 896
 897         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
 898                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
 899                 block, blocks);
 900
 901         idefloppy_init_pc(pc);
 902         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
 903                 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12;
 904                 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]);
 905         } else {
 906                 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 907                 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 908         }
 909         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 910         pc->callback = &idefloppy_rw_callback;
 911         pc->rq = rq;
 912         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 913         if (rq->cmd_flags & REQ_RW)
 914                 set_bit(PC_WRITING, &pc->flags);
 915         pc->buffer = NULL;
 916         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 917         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 918 }
 919
 920 static void
 921 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 922 {
 923         idefloppy_init_pc(pc);
 924         pc->callback = &idefloppy_rw_callback;
 925         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 926         pc->rq = rq;
 927         pc->b_count = rq->data_len;
 928         if (rq->data_len && rq_data_dir(rq) == WRITE)
 929                 set_bit(PC_WRITING, &pc->flags);
 930         pc->buffer = rq->data;
 931         if (rq->bio)
 932                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 933
 934         /*
 935          * possibly problematic, doesn't look like ide-floppy correctly
 936          * handled scattered requests if dma fails...
 937          */
 938         pc->request_transfer = pc->buffer_size = rq->data_len;
 939 }
 940
 941 /*
 942  *      idefloppy_do_request is our request handling function.
 943  */
 944 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
 945 {
 946         idefloppy_floppy_t *floppy = drive->driver_data;
 947         idefloppy_pc_t *pc;
 948         unsigned long block = (unsigned long)block_s;
 949
 950         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 951                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 952                         rq->cmd_type, rq->errors);
 953         debug_log("sector: %ld, nr_sectors: %ld, "
 954                         "current_nr_sectors: %d\n", (long)rq->sector,
 955                         rq->nr_sectors, rq->current_nr_sectors);
 956
 957         if (rq->errors >= ERROR_MAX) {
 958                 if (floppy->failed_pc)
 959                         ide_floppy_report_error(floppy, floppy->failed_pc);
 960                 else
 961                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 962                                 drive->name);
 963                 idefloppy_do_end_request(drive, 0, 0);
 964                 return ide_stopped;
 965         }
 966         if (blk_fs_request(rq)) {
 967                 if (((long)rq->sector % floppy->bs_factor) ||
 968                     (rq->nr_sectors % floppy->bs_factor)) {
 969                         printk("%s: unsupported r/w request size\n",
 970                                 drive->name);
 971                         idefloppy_do_end_request(drive, 0, 0);
 972                         return ide_stopped;
 973                 }
 974                 pc = idefloppy_next_pc_storage(drive);
 975                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 976         } else if (blk_special_request(rq)) {
 977                 pc = (idefloppy_pc_t *) rq->buffer;
 978         } else if (blk_pc_request(rq)) {
 979                 pc = idefloppy_next_pc_storage(drive);
 980                 idefloppy_blockpc_cmd(floppy, pc, rq);
 981         } else {
 982                 blk_dump_rq_flags(rq,
 983                         "ide-floppy: unsupported command in queue");
 984                 idefloppy_do_end_request(drive, 0, 0);
 985                 return ide_stopped;
 986         }
 987
 988         pc->rq = rq;
 989         return idefloppy_issue_pc(drive, pc);
 990 }
 991
 992 /*
 993  *      idefloppy_queue_pc_tail adds a special packet command request to the
 994  *      tail of the request queue, and waits for it to be serviced.
 995  */
 996 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
 997 {
 998         struct ide_floppy_obj *floppy = drive->driver_data;
 999         struct request rq;
1000
1001         ide_init_drive_cmd (&rq);
1002         rq.buffer = (char *) pc;
1003         rq.cmd_type = REQ_TYPE_SPECIAL;
1004         rq.rq_disk = floppy->disk;
1005
1006         return ide_do_drive_cmd(drive, &rq, ide_wait);
1007 }
1008
1009 /*
1010  * Look at the flexible disk page parameters. We ignore the CHS capacity
1011  * parameters and use the LBA parameters instead.
1012  */
1013 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1014 {
1015         idefloppy_floppy_t *floppy = drive->driver_data;
1016         idefloppy_pc_t pc;
1017         u8 *page;
1018         int capacity, lba_capacity;
1019         u16 transfer_rate, sector_size, cyls, rpm;
1020         u8 heads, sectors;
1021
1022         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1023                                         MODE_SENSE_CURRENT);
1024
1025         if (idefloppy_queue_pc_tail(drive, &pc)) {
1026                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1027                                 " parameters\n");
1028                 return 1;
1029         }
1030         floppy->wp = !!(pc.buffer[3] & 0x80);
1031         set_disk_ro(floppy->disk, floppy->wp);
1032         page = &pc.buffer[8];
1033
1034         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1035         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1036         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1037         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1038         heads         = pc.buffer[8 + 4];
1039         sectors       = pc.buffer[8 + 5];
1040
1041         capacity = cyls * heads * sectors * sector_size;
1042
1043         if (memcmp(page, &floppy->flexible_disk_page, 32))
1044                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1045                                 "%d sector size, %d rpm\n",
1046                                 drive->name, capacity / 1024, cyls, heads,
1047                                 sectors, transfer_rate / 8, sector_size, rpm);
1048
1049         memcpy(&floppy->flexible_disk_page, page, 32);
1050         drive->bios_cyl = cyls;
1051         drive->bios_head = heads;
1052         drive->bios_sect = sectors;
1053         lba_capacity = floppy->blocks * floppy->block_size;
1054
1055         if (capacity < lba_capacity) {
1056                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1057                         "bytes, but the drive only handles %d\n",
1058                         drive->name, lba_capacity, capacity);
1059                 floppy->blocks = floppy->block_size ?
1060                         capacity / floppy->block_size : 0;
1061         }
1062         return 0;
1063 }
1064
1065 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1066 {
1067         idefloppy_floppy_t *floppy = drive->driver_data;
1068         idefloppy_pc_t pc;
1069
1070         floppy->srfp = 0;
1071         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1072                                                  MODE_SENSE_CURRENT);
1073
1074         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1075         if (idefloppy_queue_pc_tail(drive, &pc))
1076                 return 1;
1077
1078         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1079         return (0);
1080 }
1081
1082 /*
1083  * Determine if a media is present in the floppy drive, and if so, its LBA
1084  * capacity.
1085  */
1086 static int ide_floppy_get_capacity(ide_drive_t *drive)
1087 {
1088         idefloppy_floppy_t *floppy = drive->driver_data;
1089         idefloppy_pc_t pc;
1090         u8 *cap_desc;
1091         u8 header_len, desc_cnt;
1092         int i, rc = 1, blocks, length;
1093
1094         drive->bios_cyl = 0;
1095         drive->bios_head = drive->bios_sect = 0;
1096         floppy->blocks = 0;
1097         floppy->bs_factor = 1;
1098         set_capacity(floppy->disk, 0);
1099
1100         idefloppy_create_read_capacity_cmd(&pc);
1101         if (idefloppy_queue_pc_tail(drive, &pc)) {
1102                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1103                 return 1;
1104         }
1105         header_len = pc.buffer[3];
1106         cap_desc = &pc.buffer[4];
1107         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1108
1109         for (i = 0; i < desc_cnt; i++) {
1110                 unsigned int desc_start = 4 + i*8;
1111
1112                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1113                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1114
1115                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1116                                 i, blocks * length / 1024, blocks, length);
1117
1118                 if (i)
1119                         continue;
1120                 /*
1121                  * the code below is valid only for the 1st descriptor, ie i=0
1122                  */
1123
1124                 switch (pc.buffer[desc_start + 4] & 0x03) {
1125                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1126                 case CAPACITY_UNFORMATTED:
1127                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1128                                 /*
1129                                  * If it is not a clik drive, break out
1130                                  * (maintains previous driver behaviour)
1131                                  */
1132                                 break;
1133                 case CAPACITY_CURRENT:
1134                         /* Normal Zip/LS-120 disks */
1135                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1136                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1137                                         "sector size\n", drive->name,
1138                                         blocks * length / 1024, blocks, length);
1139                         memcpy(&floppy->cap_desc, cap_desc, 8);
1140
1141                         if (!length || length % 512) {
1142                                 printk(KERN_NOTICE "%s: %d bytes block size "
1143                                         "not supported\n", drive->name, length);
1144                         } else {
1145                                 floppy->blocks = blocks;
1146                                 floppy->block_size = length;
1147                                 floppy->bs_factor = length / 512;
1148                                 if (floppy->bs_factor != 1)
1149                                         printk(KERN_NOTICE "%s: warning: non "
1150                                                 "512 bytes block size not "
1151                                                 "fully supported\n",
1152                                                 drive->name);
1153                                 rc = 0;
1154                         }
1155                         break;
1156                 case CAPACITY_NO_CARTRIDGE:
1157                         /*
1158                          * This is a KERN_ERR so it appears on screen
1159                          * for the user to see
1160                          */
1161                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1162                         break;
1163                 case CAPACITY_INVALID:
1164                         printk(KERN_ERR "%s: Invalid capacity for disk "
1165                                 "in drive\n", drive->name);
1166                         break;
1167                 }
1168                 debug_log("Descriptor 0 Code: %d\n",
1169                           pc.buffer[desc_start + 4] & 0x03);
1170         }
1171
1172         /* Clik! disk does not support get_flexible_disk_page */
1173         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1174                 (void) ide_floppy_get_flexible_disk_page(drive);
1175
1176         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1177         return rc;
1178 }
1179
1180 /*
1181  * Obtain the list of formattable capacities.
1182  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1183  * descriptors to userland, instead of our own structures.
1184  *
1185  * Userland gives us the following structure:
1186  *
1187  * struct idefloppy_format_capacities {
1188  *      int nformats;
1189  *      struct {
1190  *              int nblocks;
1191  *              int blocksize;
1192  *      } formats[];
1193  * };
1194  *
1195  * userland initializes nformats to the number of allocated formats[] records.
1196  * On exit we set nformats to the number of records we've actually initialized.
1197  */
1198
1199 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1200 {
1201         idefloppy_pc_t pc;
1202         u8 header_len, desc_cnt;
1203         int i, blocks, length, u_array_size, u_index;
1204         int __user *argp;
1205
1206         if (get_user(u_array_size, arg))
1207                 return (-EFAULT);
1208
1209         if (u_array_size <= 0)
1210                 return (-EINVAL);
1211
1212         idefloppy_create_read_capacity_cmd(&pc);
1213         if (idefloppy_queue_pc_tail(drive, &pc)) {
1214                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1215                 return (-EIO);
1216         }
1217         header_len = pc.buffer[3];
1218         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1219
1220         u_index = 0;
1221         argp = arg + 1;
1222
1223         /*
1224          * We always skip the first capacity descriptor.  That's the current
1225          * capacity.  We are interested in the remaining descriptors, the
1226          * formattable capacities.
1227          */
1228         for (i = 1; i < desc_cnt; i++) {
1229                 unsigned int desc_start = 4 + i*8;
1230
1231                 if (u_index >= u_array_size)
1232                         break;  /* User-supplied buffer too small */
1233
1234                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1235                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1236
1237                 if (put_user(blocks, argp))
1238                         return(-EFAULT);
1239                 ++argp;
1240
1241                 if (put_user(length, argp))
1242                         return (-EFAULT);
1243                 ++argp;
1244
1245                 ++u_index;
1246         }
1247
1248         if (put_user(u_index, arg))
1249                 return (-EFAULT);
1250         return (0);
1251 }
1252
1253 /*
1254 ** Get ATAPI_FORMAT_UNIT progress indication.
1255 **
1256 ** Userland gives a pointer to an int.  The int is set to a progress
1257 ** indicator 0-65536, with 65536=100%.
1258 **
1259 ** If the drive does not support format progress indication, we just check
1260 ** the dsc bit, and return either 0 or 65536.
1261 */
1262
1263 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1264 {
1265         idefloppy_floppy_t *floppy = drive->driver_data;
1266         idefloppy_pc_t pc;
1267         int progress_indication = 0x10000;
1268
1269         if (floppy->srfp) {
1270                 idefloppy_create_request_sense_cmd(&pc);
1271                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1272                         return (-EIO);
1273                 }
1274
1275                 if (floppy->sense_key == 2 &&
1276                     floppy->asc == 4 &&
1277                     floppy->ascq == 4) {
1278                         progress_indication = floppy->progress_indication;
1279                 }
1280                 /* Else assume format_unit has finished, and we're
1281                 ** at 0x10000 */
1282         } else {
1283                 unsigned long flags;
1284                 u8 stat;
1285
1286                 local_irq_save(flags);
1287                 stat = drive->hwif->INB(IDE_STATUS_REG);
1288                 local_irq_restore(flags);
1289
1290                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1291         }
1292         if (put_user(progress_indication, arg))
1293                 return (-EFAULT);
1294
1295         return (0);
1296 }
1297
1298 /*
1299  *      Return the current floppy capacity.
1300  */
1301 static sector_t idefloppy_capacity (ide_drive_t *drive)
1302 {
1303         idefloppy_floppy_t *floppy = drive->driver_data;
1304         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1305
1306         return capacity;
1307 }
1308
1309 /*
1310  *      idefloppy_identify_device checks if we can support a drive,
1311  *      based on the ATAPI IDENTIFY command results.
1312  */
1313 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1314 {
1315         struct idefloppy_id_gcw gcw;
1316 #if IDEFLOPPY_DEBUG_INFO
1317         char buffer[80];
1318 #endif /* IDEFLOPPY_DEBUG_INFO */
1319
1320         *((u16 *) &gcw) = id->config;
1321
1322 #ifdef CONFIG_PPC
1323         /* kludge for Apple PowerBook internal zip */
1324         if ((gcw.device_type == 5) &&
1325             !strstr(id->model, "CD-ROM") &&
1326             strstr(id->model, "ZIP"))
1327                 gcw.device_type = 0;
1328 #endif
1329
1330 #if IDEFLOPPY_DEBUG_INFO
1331         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1332         switch (gcw.protocol) {
1333                 case 0: case 1: sprintf(buffer, "ATA");break;
1334                 case 2: sprintf(buffer, "ATAPI");break;
1335                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1336         }
1337         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1338         switch (gcw.device_type) {
1339                 case 0: sprintf(buffer, "Direct-access Device");break;
1340                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1341                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1342                 case 5: sprintf(buffer, "CD-ROM Device");break;
1343                 case 6: sprintf(buffer, "Reserved");
1344                 case 7: sprintf(buffer, "Optical memory Device");break;
1345                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1346                 default: sprintf(buffer, "Reserved");
1347         }
1348         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1349         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1350         switch (gcw.drq_type) {
1351                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1352                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1353                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1354                 case 3: sprintf(buffer, "Reserved");break;
1355         }
1356         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1357         switch (gcw.packet_size) {
1358                 case 0: sprintf(buffer, "12 bytes");break;
1359                 case 1: sprintf(buffer, "16 bytes");break;
1360                 default: sprintf(buffer, "Reserved");break;
1361         }
1362         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1363 #endif /* IDEFLOPPY_DEBUG_INFO */
1364
1365         if (gcw.protocol != 2)
1366                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1367         else if (gcw.device_type != 0)
1368                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1369         else if (!gcw.removable)
1370                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1371         else if (gcw.drq_type == 3) {
1372                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1373         } else if (gcw.packet_size != 0) {
1374                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1375         } else
1376                 return 1;
1377         return 0;
1378 }
1379
1380 #ifdef CONFIG_IDE_PROC_FS
1381 static void idefloppy_add_settings(ide_drive_t *drive)
1382 {
1383         idefloppy_floppy_t *floppy = drive->driver_data;
1384
1385 /*
1386  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1387  */
1388         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1389         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1390         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1391         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1392 }
1393 #else
1394 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1395 #endif
1396
1397 /*
1398  *      Driver initialization.
1399  */
1400 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1401 {
1402         struct idefloppy_id_gcw gcw;
1403
1404         *((u16 *) &gcw) = drive->id->config;
1405         floppy->pc = floppy->pc_stack;
1406         if (gcw.drq_type == 1)
1407                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1408         /*
1409          *      We used to check revisions here. At this point however
1410          *      I'm giving up. Just assume they are all broken, its easier.
1411          *
1412          *      The actual reason for the workarounds was likely
1413          *      a driver bug after all rather than a firmware bug,
1414          *      and the workaround below used to hide it. It should
1415          *      be fixed as of version 1.9, but to be on the safe side
1416          *      we'll leave the limitation below for the 2.2.x tree.
1417          */
1418
1419         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1420                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1421                 /* This value will be visible in the /proc/ide/hdx/settings */
1422                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1423                 blk_queue_max_sectors(drive->queue, 64);
1424         }
1425
1426         /*
1427         *      Guess what?  The IOMEGA Clik! drive also needs the
1428         *      above fix.  It makes nasty clicking noises without
1429         *      it, so please don't remove this.
1430         */
1431         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1432                 blk_queue_max_sectors(drive->queue, 64);
1433                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1434         }
1435
1436
1437         (void) ide_floppy_get_capacity(drive);
1438         idefloppy_add_settings(drive);
1439 }
1440
1441 static void ide_floppy_remove(ide_drive_t *drive)
1442 {
1443         idefloppy_floppy_t *floppy = drive->driver_data;
1444         struct gendisk *g = floppy->disk;
1445
1446         ide_proc_unregister_driver(drive, floppy->driver);
1447
1448         del_gendisk(g);
1449
1450         ide_floppy_put(floppy);
1451 }
1452
1453 static void idefloppy_cleanup_obj(struct kref *kref)
1454 {
1455         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1456         ide_drive_t *drive = floppy->drive;
1457         struct gendisk *g = floppy->disk;
1458
1459         drive->driver_data = NULL;
1460         g->private_data = NULL;
1461         put_disk(g);
1462         kfree(floppy);
1463 }
1464
1465 #ifdef CONFIG_IDE_PROC_FS
1466 static int proc_idefloppy_read_capacity
1467         (char *page, char **start, off_t off, int count, int *eof, void *data)
1468 {
1469         ide_drive_t*drive = (ide_drive_t *)data;
1470         int len;
1471
1472         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1473         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1474 }
1475
1476 static ide_proc_entry_t idefloppy_proc[] = {
1477         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1478         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1479         { NULL, 0, NULL, NULL }
1480 };
1481 #endif  /* CONFIG_IDE_PROC_FS */
1482
1483 static int ide_floppy_probe(ide_drive_t *);
1484
1485 static ide_driver_t idefloppy_driver = {
1486         .gen_driver = {
1487                 .owner          = THIS_MODULE,
1488                 .name           = "ide-floppy",
1489                 .bus            = &ide_bus_type,
1490         },
1491         .probe                  = ide_floppy_probe,
1492         .remove                 = ide_floppy_remove,
1493         .version                = IDEFLOPPY_VERSION,
1494         .media                  = ide_floppy,
1495         .supports_dsc_overlap   = 0,
1496         .do_request             = idefloppy_do_request,
1497         .end_request            = idefloppy_do_end_request,
1498         .error                  = __ide_error,
1499         .abort                  = __ide_abort,
1500 #ifdef CONFIG_IDE_PROC_FS
1501         .proc                   = idefloppy_proc,
1502 #endif
1503 };
1504
1505 static int idefloppy_open(struct inode *inode, struct file *filp)
1506 {
1507         struct gendisk *disk = inode->i_bdev->bd_disk;
1508         struct ide_floppy_obj *floppy;
1509         ide_drive_t *drive;
1510         idefloppy_pc_t pc;
1511         int ret = 0;
1512
1513         debug_log("Reached %s\n", __func__);
1514
1515         if (!(floppy = ide_floppy_get(disk)))
1516                 return -ENXIO;
1517
1518         drive = floppy->drive;
1519
1520         floppy->openers++;
1521
1522         if (floppy->openers == 1) {
1523                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1524                 /* Just in case */
1525
1526                 idefloppy_create_test_unit_ready_cmd(&pc);
1527                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1528                         idefloppy_create_start_stop_cmd(&pc, 1);
1529                         (void) idefloppy_queue_pc_tail(drive, &pc);
1530                 }
1531
1532                 if (ide_floppy_get_capacity(drive)
1533                    && (filp->f_flags & O_NDELAY) == 0
1534                     /*
1535                     ** Allow O_NDELAY to open a drive without a disk, or with
1536                     ** an unreadable disk, so that we can get the format
1537                     ** capacity of the drive or begin the format - Sam
1538                     */
1539                     ) {
1540                         ret = -EIO;
1541                         goto out_put_floppy;
1542                 }
1543
1544                 if (floppy->wp && (filp->f_mode & 2)) {
1545                         ret = -EROFS;
1546                         goto out_put_floppy;
1547                 }
1548                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1549                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1550                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1551                         idefloppy_create_prevent_cmd(&pc, 1);
1552                         (void) idefloppy_queue_pc_tail(drive, &pc);
1553                 }
1554                 check_disk_change(inode->i_bdev);
1555         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1556                 ret = -EBUSY;
1557                 goto out_put_floppy;
1558         }
1559         return 0;
1560
1561 out_put_floppy:
1562         floppy->openers--;
1563         ide_floppy_put(floppy);
1564         return ret;
1565 }
1566
1567 static int idefloppy_release(struct inode *inode, struct file *filp)
1568 {
1569         struct gendisk *disk = inode->i_bdev->bd_disk;
1570         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1571         ide_drive_t *drive = floppy->drive;
1572         idefloppy_pc_t pc;
1573
1574         debug_log("Reached %s\n", __func__);
1575
1576         if (floppy->openers == 1) {
1577                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1578                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1579                         idefloppy_create_prevent_cmd(&pc, 0);
1580                         (void) idefloppy_queue_pc_tail(drive, &pc);
1581                 }
1582
1583                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1584         }
1585
1586         floppy->openers--;
1587
1588         ide_floppy_put(floppy);
1589
1590         return 0;
1591 }
1592
1593 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1594 {
1595         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1596         ide_drive_t *drive = floppy->drive;
1597
1598         geo->heads = drive->bios_head;
1599         geo->sectors = drive->bios_sect;
1600         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1601         return 0;
1602 }
1603
1604 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1605                                unsigned long arg, unsigned int cmd)
1606 {
1607         if (floppy->openers > 1)
1608                 return -EBUSY;
1609
1610         /* The IOMEGA Clik! Drive doesn't support this command -
1611          * no room for an eject mechanism */
1612         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1613                 int prevent = arg ? 1 : 0;
1614
1615                 if (cmd == CDROMEJECT)
1616                         prevent = 0;
1617
1618                 idefloppy_create_prevent_cmd(pc, prevent);
1619                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1620         }
1621
1622         if (cmd == CDROMEJECT) {
1623                 idefloppy_create_start_stop_cmd(pc, 2);
1624                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1625         }
1626
1627         return 0;
1628 }
1629
1630 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1631                                   int __user *arg)
1632 {
1633         int blocks, length, flags, err = 0;
1634         idefloppy_pc_t pc;
1635
1636         if (floppy->openers > 1) {
1637                 /* Don't format if someone is using the disk */
1638                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1639                 return -EBUSY;
1640         }
1641
1642         set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1643
1644         /*
1645          * Send ATAPI_FORMAT_UNIT to the drive.
1646          *
1647          * Userland gives us the following structure:
1648          *
1649          * struct idefloppy_format_command {
1650          *        int nblocks;
1651          *        int blocksize;
1652          *        int flags;
1653          *        } ;
1654          *
1655          * flags is a bitmask, currently, the only defined flag is:
1656          *
1657          *        0x01 - verify media after format.
1658          */
1659         if (get_user(blocks, arg) ||
1660                         get_user(length, arg+1) ||
1661                         get_user(flags, arg+2)) {
1662                 err = -EFAULT;
1663                 goto out;
1664         }
1665
1666         (void) idefloppy_get_sfrp_bit(floppy->drive);
1667         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1668
1669         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1670                 err = -EIO;
1671
1672 out:
1673         if (err)
1674                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1675         return err;
1676 }
1677
1678
1679 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1680                         unsigned int cmd, unsigned long arg)
1681 {
1682         struct block_device *bdev = inode->i_bdev;
1683         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1684         ide_drive_t *drive = floppy->drive;
1685         idefloppy_pc_t pc;
1686         void __user *argp = (void __user *)arg;
1687         int err;
1688
1689         switch (cmd) {
1690         case CDROMEJECT:
1691                 /* fall through */
1692         case CDROM_LOCKDOOR:
1693                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1694         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1695                 return 0;
1696         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1697                 return ide_floppy_get_format_capacities(drive, argp);
1698         case IDEFLOPPY_IOCTL_FORMAT_START:
1699                 if (!(file->f_mode & 2))
1700                         return -EPERM;
1701
1702                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1703         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1704                 return idefloppy_get_format_progress(drive, argp);
1705         }
1706
1707         /*
1708          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1709          * and CDROM_SEND_PACKET (legacy) ioctls
1710          */
1711         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1712                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1713                                         bdev->bd_disk, cmd, argp);
1714         else
1715                 err = -ENOTTY;
1716
1717         if (err == -ENOTTY)
1718                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1719
1720         return err;
1721 }
1722
1723 static int idefloppy_media_changed(struct gendisk *disk)
1724 {
1725         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1726         ide_drive_t *drive = floppy->drive;
1727
1728         /* do not scan partitions twice if this is a removable device */
1729         if (drive->attach) {
1730                 drive->attach = 0;
1731                 return 0;
1732         }
1733         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1734 }
1735
1736 static int idefloppy_revalidate_disk(struct gendisk *disk)
1737 {
1738         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1739         set_capacity(disk, idefloppy_capacity(floppy->drive));
1740         return 0;
1741 }
1742
1743 static struct block_device_operations idefloppy_ops = {
1744         .owner          = THIS_MODULE,
1745         .open           = idefloppy_open,
1746         .release        = idefloppy_release,
1747         .ioctl          = idefloppy_ioctl,
1748         .getgeo         = idefloppy_getgeo,
1749         .media_changed  = idefloppy_media_changed,
1750         .revalidate_disk= idefloppy_revalidate_disk
1751 };
1752
1753 static int ide_floppy_probe(ide_drive_t *drive)
1754 {
1755         idefloppy_floppy_t *floppy;
1756         struct gendisk *g;
1757
1758         if (!strstr("ide-floppy", drive->driver_req))
1759                 goto failed;
1760         if (!drive->present)
1761                 goto failed;
1762         if (drive->media != ide_floppy)
1763                 goto failed;
1764         if (!idefloppy_identify_device (drive, drive->id)) {
1765                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1766                 goto failed;
1767         }
1768         if (drive->scsi) {
1769                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1770                 goto failed;
1771         }
1772         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1773                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1774                 goto failed;
1775         }
1776
1777         g = alloc_disk(1 << PARTN_BITS);
1778         if (!g)
1779                 goto out_free_floppy;
1780
1781         ide_init_disk(g, drive);
1782
1783         ide_proc_register_driver(drive, &idefloppy_driver);
1784
1785         kref_init(&floppy->kref);
1786
1787         floppy->drive = drive;
1788         floppy->driver = &idefloppy_driver;
1789         floppy->disk = g;
1790
1791         g->private_data = &floppy->driver;
1792
1793         drive->driver_data = floppy;
1794
1795         idefloppy_setup (drive, floppy);
1796
1797         g->minors = 1 << PARTN_BITS;
1798         g->driverfs_dev = &drive->gendev;
1799         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1800         g->fops = &idefloppy_ops;
1801         drive->attach = 1;
1802         add_disk(g);
1803         return 0;
1804
1805 out_free_floppy:
1806         kfree(floppy);
1807 failed:
1808         return -ENODEV;
1809 }
1810
1811 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1812
1813 static void __exit idefloppy_exit (void)
1814 {
1815         driver_unregister(&idefloppy_driver.gen_driver);
1816 }
1817
1818 static int __init idefloppy_init(void)
1819 {
1820         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1821         return driver_register(&idefloppy_driver.gen_driver);
1822 }
1823
1824 MODULE_ALIAS("ide:*m-floppy*");
1825 module_init(idefloppy_init);
1826 module_exit(idefloppy_exit);
1827 MODULE_LICENSE("GPL");