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_FORMAT_IN_PROGRESS    3       /* Format in progress */
 184 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
 185 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
 186
 187 /*
 188  *      Defines for the mode sense command
 189  */
 190 #define MODE_SENSE_CURRENT              0x00
 191 #define MODE_SENSE_CHANGEABLE           0x01
 192 #define MODE_SENSE_DEFAULT              0x02
 193 #define MODE_SENSE_SAVED                0x03
 194
 195 /*
 196  *      IOCTLs used in low-level formatting.
 197  */
 198
 199 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 200 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 201 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 202 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 203
 204 /*
 205  *      Error codes which are returned in rq->errors to the higher part
 206  *      of the driver.
 207  */
 208 #define IDEFLOPPY_ERROR_GENERAL         101
 209
 210 /*
 211  *      The following is used to format the general configuration word of
 212  *      the ATAPI IDENTIFY DEVICE command.
 213  */
 214 struct idefloppy_id_gcw {
 215 #if defined(__LITTLE_ENDIAN_BITFIELD)
 216         unsigned packet_size            :2;     /* Packet Size */
 217         unsigned reserved234            :3;     /* Reserved */
 218         unsigned drq_type               :2;     /* Command packet DRQ type */
 219         unsigned removable              :1;     /* Removable media */
 220         unsigned device_type            :5;     /* Device type */
 221         unsigned reserved13             :1;     /* Reserved */
 222         unsigned protocol               :2;     /* Protocol type */
 223 #elif defined(__BIG_ENDIAN_BITFIELD)
 224         unsigned protocol               :2;     /* Protocol type */
 225         unsigned reserved13             :1;     /* Reserved */
 226         unsigned device_type            :5;     /* Device type */
 227         unsigned removable              :1;     /* Removable media */
 228         unsigned drq_type               :2;     /* Command packet DRQ type */
 229         unsigned reserved234            :3;     /* Reserved */
 230         unsigned packet_size            :2;     /* Packet Size */
 231 #else
 232 #error "Bitfield endianness not defined! Check your byteorder.h"
 233 #endif
 234 };
 235
 236 /*
 237  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 238  * See SFF-8070i spec.
 239  */
 240 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 241 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 242
 243 static DEFINE_MUTEX(idefloppy_ref_mutex);
 244
 245 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 246
 247 #define ide_floppy_g(disk) \
 248         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 249
 250 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 251 {
 252         struct ide_floppy_obj *floppy = NULL;
 253
 254         mutex_lock(&idefloppy_ref_mutex);
 255         floppy = ide_floppy_g(disk);
 256         if (floppy)
 257                 kref_get(&floppy->kref);
 258         mutex_unlock(&idefloppy_ref_mutex);
 259         return floppy;
 260 }
 261
 262 static void idefloppy_cleanup_obj(struct kref *);
 263
 264 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 265 {
 266         mutex_lock(&idefloppy_ref_mutex);
 267         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 268         mutex_unlock(&idefloppy_ref_mutex);
 269 }
 270
 271 /*
 272  *      Too bad. The drive wants to send us data which we are not ready to accept.
 273  *      Just throw it away.
 274  */
 275 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 276 {
 277         while (bcount--)
 278                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 279 }
 280
 281 static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
 282 {
 283         while (bcount--)
 284                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 285 }
 286
 287
 288 /*
 289  *      idefloppy_do_end_request is used to finish servicing a request.
 290  *
 291  *      For read/write requests, we will call ide_end_request to pass to the
 292  *      next buffer.
 293  */
 294 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 295 {
 296         idefloppy_floppy_t *floppy = drive->driver_data;
 297         struct request *rq = HWGROUP(drive)->rq;
 298         int error;
 299
 300         debug_log("Reached %s\n", __func__);
 301
 302         switch (uptodate) {
 303                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 304                 case 1: error = 0; break;
 305                 default: error = uptodate;
 306         }
 307         if (error)
 308                 floppy->failed_pc = NULL;
 309         /* Why does this happen? */
 310         if (!rq)
 311                 return 0;
 312         if (!blk_special_request(rq)) {
 313                 /* our real local end request function */
 314                 ide_end_request(drive, uptodate, nsecs);
 315                 return 0;
 316         }
 317         rq->errors = error;
 318         /* fixme: need to move this local also */
 319         ide_end_drive_cmd(drive, 0, 0);
 320         return 0;
 321 }
 322
 323 static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
 324                                   unsigned int bcount, int direction)
 325 {
 326         struct request *rq = pc->rq;
 327         struct req_iterator iter;
 328         struct bio_vec *bvec;
 329         unsigned long flags;
 330         int count, done = 0;
 331         char *data;
 332
 333         rq_for_each_segment(bvec, rq, iter) {
 334                 if (!bcount)
 335                         break;
 336
 337                 count = min(bvec->bv_len, bcount);
 338
 339                 data = bvec_kmap_irq(bvec, &flags);
 340                 if (direction)
 341                         drive->hwif->atapi_output_bytes(drive, data, count);
 342                 else
 343                         drive->hwif->atapi_input_bytes(drive, data, count);
 344                 bvec_kunmap_irq(data, &flags);
 345
 346                 bcount -= count;
 347                 pc->b_count += count;
 348                 done += count;
 349         }
 350
 351         idefloppy_do_end_request(drive, 1, done >> 9);
 352
 353         if (bcount) {
 354                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 355                                 drive->name, __func__, bcount);
 356                 if (direction)
 357                         idefloppy_write_zeros(drive, bcount);
 358                 else
 359                         idefloppy_discard_data(drive, bcount);
 360
 361         }
 362 }
 363
 364 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 365 {
 366         struct request *rq = pc->rq;
 367         struct bio *bio = rq->bio;
 368
 369         while ((bio = rq->bio) != NULL)
 370                 idefloppy_do_end_request(drive, 1, 0);
 371 }
 372
 373 /*
 374  *      idefloppy_queue_pc_head generates a new packet command request in front
 375  *      of the request queue, before the current request, so that it will be
 376  *      processed immediately, on the next pass through the driver.
 377  */
 378 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 379 {
 380         struct ide_floppy_obj *floppy = drive->driver_data;
 381
 382         ide_init_drive_cmd(rq);
 383         rq->buffer = (char *) pc;
 384         rq->cmd_type = REQ_TYPE_SPECIAL;
 385         rq->rq_disk = floppy->disk;
 386         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 387 }
 388
 389 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 390 {
 391         idefloppy_floppy_t *floppy = drive->driver_data;
 392
 393         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 394                 floppy->pc_stack_index=0;
 395         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 396 }
 397
 398 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 399 {
 400         idefloppy_floppy_t *floppy = drive->driver_data;
 401
 402         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 403                 floppy->rq_stack_index = 0;
 404         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 405 }
 406
 407 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 408 {
 409         idefloppy_floppy_t *floppy = drive->driver_data;
 410         u8 *buf = floppy->pc->buffer;
 411
 412         debug_log("Reached %s\n", __func__);
 413
 414         if (!floppy->pc->error) {
 415                 floppy->sense_key = buf[2] & 0x0F;
 416                 floppy->asc = buf[12];
 417                 floppy->ascq = buf[13];
 418                 floppy->progress_indication = buf[15] & 0x80 ?
 419                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 420
 421                 if (floppy->failed_pc)
 422                         debug_log("pc = %x, sense key = %x, asc = %x,"
 423                                         " ascq = %x\n",
 424                                         floppy->failed_pc->c[0],
 425                                         floppy->sense_key,
 426                                         floppy->asc,
 427                                         floppy->ascq);
 428                 else
 429                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 430                                         floppy->sense_key,
 431                                         floppy->asc,
 432                                         floppy->ascq);
 433
 434
 435                 idefloppy_do_end_request(drive, 1, 0);
 436         } else {
 437                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 438                                 " request!\n");
 439                 idefloppy_do_end_request(drive, 0, 0);
 440         }
 441 }
 442
 443 /*
 444  *      General packet command callback function.
 445  */
 446 static void idefloppy_pc_callback (ide_drive_t *drive)
 447 {
 448         idefloppy_floppy_t *floppy = drive->driver_data;
 449
 450         debug_log("Reached %s\n", __func__);
 451
 452         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 453 }
 454
 455 /*
 456  *      idefloppy_init_pc initializes a packet command.
 457  */
 458 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 459 {
 460         memset(pc->c, 0, 12);
 461         pc->retries = 0;
 462         pc->flags = 0;
 463         pc->request_transfer = 0;
 464         pc->buffer = pc->pc_buffer;
 465         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 466         pc->callback = &idefloppy_pc_callback;
 467 }
 468
 469 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 470 {
 471         idefloppy_init_pc(pc);
 472         pc->c[0] = GPCMD_REQUEST_SENSE;
 473         pc->c[4] = 255;
 474         pc->request_transfer = 18;
 475         pc->callback = &idefloppy_request_sense_callback;
 476 }
 477
 478 /*
 479  *      idefloppy_retry_pc is called when an error was detected during the
 480  *      last packet command. We queue a request sense packet command in
 481  *      the head of the request list.
 482  */
 483 static void idefloppy_retry_pc (ide_drive_t *drive)
 484 {
 485         idefloppy_pc_t *pc;
 486         struct request *rq;
 487
 488         (void)drive->hwif->INB(IDE_ERROR_REG);
 489         pc = idefloppy_next_pc_storage(drive);
 490         rq = idefloppy_next_rq_storage(drive);
 491         idefloppy_create_request_sense_cmd(pc);
 492         idefloppy_queue_pc_head(drive, pc, rq);
 493 }
 494
 495 /* The usual interrupt handler called during a packet command. */
 496 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 497 {
 498         idefloppy_floppy_t *floppy = drive->driver_data;
 499         ide_hwif_t *hwif = drive->hwif;
 500         idefloppy_pc_t *pc = floppy->pc;
 501         struct request *rq = pc->rq;
 502         xfer_func_t *xferfunc;
 503         unsigned int temp;
 504         int dma_error = 0;
 505         u16 bcount;
 506         u8 stat, ireason;
 507
 508         debug_log("Reached %s interrupt handler\n", __func__);
 509
 510         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 511                 dma_error = hwif->ide_dma_end(drive);
 512                 if (dma_error) {
 513                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 514                                         rq_data_dir(rq) ? "write" : "read");
 515                         set_bit(PC_DMA_ERROR, &pc->flags);
 516                 } else {
 517                         pc->actually_transferred = pc->request_transfer;
 518                         idefloppy_update_buffers(drive, pc);
 519                 }
 520                 debug_log("DMA finished\n");
 521         }
 522
 523         /* Clear the interrupt */
 524         stat = drive->hwif->INB(IDE_STATUS_REG);
 525
 526         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 527                 debug_log("Packet command completed, %d bytes transferred\n",
 528                                 pc->actually_transferred);
 529                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 530
 531                 local_irq_enable_in_hardirq();
 532
 533                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 534                         /* Error detected */
 535                         debug_log("%s: I/O error\n", drive->name);
 536                         rq->errors++;
 537                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 538                                 printk(KERN_ERR "ide-floppy: I/O error in "
 539                                         "request sense command\n");
 540                                 return ide_do_reset(drive);
 541                         }
 542                         /* Retry operation */
 543                         idefloppy_retry_pc(drive);
 544                         /* queued, but not started */
 545                         return ide_stopped;
 546                 }
 547                 pc->error = 0;
 548                 if (floppy->failed_pc == pc)
 549                         floppy->failed_pc = NULL;
 550                 /* Command finished - Call the callback function */
 551                 pc->callback(drive);
 552                 return ide_stopped;
 553         }
 554
 555         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 556                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 557                         "more interrupts in DMA mode\n");
 558                 ide_dma_off(drive);
 559                 return ide_do_reset(drive);
 560         }
 561
 562         /* Get the number of bytes to transfer */
 563         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 564                   hwif->INB(IDE_BCOUNTL_REG);
 565         /* on this interrupt */
 566         ireason = hwif->INB(IDE_IREASON_REG);
 567
 568         if (ireason & CD) {
 569                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 570                 return ide_do_reset(drive);
 571         }
 572         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
 573                 /* Hopefully, we will never get here */
 574                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 575                                 (ireason & IO) ? "Write" : "Read");
 576                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 577                                 (ireason & IO) ? "Read" : "Write");
 578                 return ide_do_reset(drive);
 579         }
 580         if (!test_bit(PC_WRITING, &pc->flags)) {
 581                 /* Reading - Check that we have enough space */
 582                 temp = pc->actually_transferred + bcount;
 583                 if (temp > pc->request_transfer) {
 584                         if (temp > pc->buffer_size) {
 585                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 586                                         "to send us more data than expected "
 587                                         "- discarding data\n");
 588                                 idefloppy_discard_data(drive, bcount);
 589
 590                                 ide_set_handler(drive,
 591                                                 &idefloppy_pc_intr,
 592                                                 IDEFLOPPY_WAIT_CMD,
 593                                                 NULL);
 594                                 return ide_started;
 595                         }
 596                         debug_log("The floppy wants to send us more data than"
 597                                         " expected - allowing transfer\n");
 598                 }
 599         }
 600         if (test_bit(PC_WRITING, &pc->flags))
 601                 xferfunc = hwif->atapi_output_bytes;
 602         else
 603                 xferfunc = hwif->atapi_input_bytes;
 604
 605         if (pc->buffer)
 606                 xferfunc(drive, pc->current_position, bcount);
 607         else
 608                 ide_floppy_io_buffers(drive, pc, bcount,
 609                                       test_bit(PC_WRITING, &pc->flags));
 610
 611         /* Update the current position */
 612         pc->actually_transferred += bcount;
 613         pc->current_position += bcount;
 614
 615         /* And set the interrupt handler again */
 616         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 617         return ide_started;
 618 }
 619
 620 /*
 621  * This is the original routine that did the packet transfer.
 622  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 623  * for that drive below. The algorithm is chosen based on drive type
 624  */
 625 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 626 {
 627         ide_startstop_t startstop;
 628         idefloppy_floppy_t *floppy = drive->driver_data;
 629         u8 ireason;
 630
 631         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 632                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 633                                 "initiated yet DRQ isn't asserted\n");
 634                 return startstop;
 635         }
 636         ireason = drive->hwif->INB(IDE_IREASON_REG);
 637         if ((ireason & CD) == 0 || (ireason & IO)) {
 638                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 639                                 "issuing a packet command\n");
 640                 return ide_do_reset(drive);
 641         }
 642
 643         /* Set the interrupt routine */
 644         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 645         /* Send the actual packet */
 646         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 647         return ide_started;
 648 }
 649
 650
 651 /*
 652  * What we have here is a classic case of a top half / bottom half
 653  * interrupt service routine. In interrupt mode, the device sends
 654  * an interrupt to signal it's ready to receive a packet. However,
 655  * we need to delay about 2-3 ticks before issuing the packet or we
 656  * gets in trouble.
 657  *
 658  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 659  * directly). In either case, when the device says it's ready for a
 660  * packet, we schedule the packet transfer to occur about 2-3 ticks
 661  * later in transfer_pc2.
 662  */
 663 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 664 {
 665         idefloppy_floppy_t *floppy = drive->driver_data;
 666
 667         /* Send the actual packet */
 668         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 669         /* Timeout for the packet command */
 670         return IDEFLOPPY_WAIT_CMD;
 671 }
 672
 673 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 674 {
 675         idefloppy_floppy_t *floppy = drive->driver_data;
 676         ide_startstop_t startstop;
 677         u8 ireason;
 678
 679         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 680                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 681                                 "initiated yet DRQ isn't asserted\n");
 682                 return startstop;
 683         }
 684         ireason = drive->hwif->INB(IDE_IREASON_REG);
 685         if ((ireason & CD) == 0 || (ireason & IO)) {
 686                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 687                                 "while issuing a packet command\n");
 688                 return ide_do_reset(drive);
 689         }
 690         /*
 691          * The following delay solves a problem with ATAPI Zip 100 drives
 692          * where the Busy flag was apparently being deasserted before the
 693          * unit was ready to receive data. This was happening on a
 694          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 695          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 696          * used until after the packet is moved in about 50 msec.
 697          */
 698
 699         ide_set_handler(drive,
 700           &idefloppy_pc_intr,           /* service routine for packet command */
 701           floppy->ticks,                /* wait this long before "failing" */
 702           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 703         return ide_started;
 704 }
 705
 706 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 707                                     idefloppy_pc_t *pc)
 708 {
 709         /* supress error messages resulting from Medium not present */
 710         if (floppy->sense_key == 0x02 &&
 711             floppy->asc       == 0x3a &&
 712             floppy->ascq      == 0x00)
 713                 return;
 714
 715         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 716                         "asc = %2x, ascq = %2x\n",
 717                         floppy->drive->name, pc->c[0], floppy->sense_key,
 718                         floppy->asc, floppy->ascq);
 719
 720 }
 721
 722 /*
 723  *      Issue a packet command
 724  */
 725 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 726 {
 727         idefloppy_floppy_t *floppy = drive->driver_data;
 728         ide_hwif_t *hwif = drive->hwif;
 729         ide_handler_t *pkt_xfer_routine;
 730         u16 bcount;
 731         u8 dma;
 732
 733         if (floppy->failed_pc == NULL &&
 734             pc->c[0] != GPCMD_REQUEST_SENSE)
 735                 floppy->failed_pc = pc;
 736         /* Set the current packet command */
 737         floppy->pc = pc;
 738
 739         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
 740             test_bit(PC_ABORT, &pc->flags)) {
 741                 /*
 742                  *      We will "abort" retrying a packet command in case
 743                  *      a legitimate error code was received.
 744                  */
 745                 if (!test_bit(PC_ABORT, &pc->flags)) {
 746                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
 747                                 ide_floppy_report_error(floppy, pc);
 748                         /* Giving up */
 749                         pc->error = IDEFLOPPY_ERROR_GENERAL;
 750                 }
 751                 floppy->failed_pc = NULL;
 752                 pc->callback(drive);
 753                 return ide_stopped;
 754         }
 755
 756         debug_log("Retry number - %d\n", pc->retries);
 757
 758         pc->retries++;
 759         /* We haven't transferred any data yet */
 760         pc->actually_transferred = 0;
 761         pc->current_position = pc->buffer;
 762         bcount = min(pc->request_transfer, 63 * 1024);
 763
 764         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 765                 ide_dma_off(drive);
 766
 767         dma = 0;
 768
 769         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 770                 dma = !hwif->dma_setup(drive);
 771
 772         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 773                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 774
 775         if (dma) {      /* Begin DMA, if necessary */
 776                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 777                 hwif->dma_start(drive);
 778         }
 779
 780         /* Can we transfer the packet when we get the interrupt or wait? */
 781         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
 782                 /* wait */
 783                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 784         } else {
 785                 /* immediate */
 786                 pkt_xfer_routine = &idefloppy_transfer_pc;
 787         }
 788
 789         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
 790                 /* Issue the packet command */
 791                 ide_execute_command(drive, WIN_PACKETCMD,
 792                                 pkt_xfer_routine,
 793                                 IDEFLOPPY_WAIT_CMD,
 794                                 NULL);
 795                 return ide_started;
 796         } else {
 797                 /* Issue the packet command */
 798                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 799                 return (*pkt_xfer_routine) (drive);
 800         }
 801 }
 802
 803 static void idefloppy_rw_callback (ide_drive_t *drive)
 804 {
 805         debug_log("Reached %s\n", __func__);
 806
 807         idefloppy_do_end_request(drive, 1, 0);
 808         return;
 809 }
 810
 811 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 812 {
 813         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 814
 815         idefloppy_init_pc(pc);
 816         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 817         pc->c[4] = prevent;
 818 }
 819
 820 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 821 {
 822         idefloppy_init_pc(pc);
 823         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 824         pc->c[7] = 255;
 825         pc->c[8] = 255;
 826         pc->request_transfer = 255;
 827 }
 828
 829 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 830                                               int flags)
 831 {
 832         idefloppy_init_pc(pc);
 833         pc->c[0] = GPCMD_FORMAT_UNIT;
 834         pc->c[1] = 0x17;
 835
 836         memset(pc->buffer, 0, 12);
 837         pc->buffer[1] = 0xA2;
 838         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 839
 840         if (flags & 1)                          /* Verify bit on... */
 841                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 842         pc->buffer[3] = 8;
 843
 844         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 845         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 846         pc->buffer_size=12;
 847         set_bit(PC_WRITING, &pc->flags);
 848 }
 849
 850 /*
 851  *      A mode sense command is used to "sense" floppy parameters.
 852  */
 853 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 854 {
 855         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 856
 857         idefloppy_init_pc(pc);
 858         pc->c[0] = GPCMD_MODE_SENSE_10;
 859         pc->c[1] = 0;
 860         pc->c[2] = page_code + (type << 6);
 861
 862         switch (page_code) {
 863                 case IDEFLOPPY_CAPABILITIES_PAGE:
 864                         length += 12;
 865                         break;
 866                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 867                         length += 32;
 868                         break;
 869                 default:
 870                         printk(KERN_ERR "ide-floppy: unsupported page code "
 871                                 "in create_mode_sense_cmd\n");
 872         }
 873         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 874         pc->request_transfer = length;
 875 }
 876
 877 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 878 {
 879         idefloppy_init_pc(pc);
 880         pc->c[0] = GPCMD_START_STOP_UNIT;
 881         pc->c[4] = start;
 882 }
 883
 884 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 885 {
 886         idefloppy_init_pc(pc);
 887         pc->c[0] = GPCMD_TEST_UNIT_READY;
 888 }
 889
 890 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 891                                     idefloppy_pc_t *pc, struct request *rq,
 892                                     unsigned long sector)
 893 {
 894         int block = sector / floppy->bs_factor;
 895         int blocks = rq->nr_sectors / floppy->bs_factor;
 896         int cmd = rq_data_dir(rq);
 897
 898         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 899                 block, blocks);
 900
 901         idefloppy_init_pc(pc);
 902         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 903         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 904         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 905
 906         pc->callback = &idefloppy_rw_callback;
 907         pc->rq = rq;
 908         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 909         if (rq->cmd_flags & REQ_RW)
 910                 set_bit(PC_WRITING, &pc->flags);
 911         pc->buffer = NULL;
 912         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 913         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 914 }
 915
 916 static void
 917 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 918 {
 919         idefloppy_init_pc(pc);
 920         pc->callback = &idefloppy_rw_callback;
 921         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 922         pc->rq = rq;
 923         pc->b_count = rq->data_len;
 924         if (rq->data_len && rq_data_dir(rq) == WRITE)
 925                 set_bit(PC_WRITING, &pc->flags);
 926         pc->buffer = rq->data;
 927         if (rq->bio)
 928                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 929
 930         /*
 931          * possibly problematic, doesn't look like ide-floppy correctly
 932          * handled scattered requests if dma fails...
 933          */
 934         pc->request_transfer = pc->buffer_size = rq->data_len;
 935 }
 936
 937 /*
 938  *      idefloppy_do_request is our request handling function.
 939  */
 940 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
 941 {
 942         idefloppy_floppy_t *floppy = drive->driver_data;
 943         idefloppy_pc_t *pc;
 944         unsigned long block = (unsigned long)block_s;
 945
 946         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 947                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 948                         rq->cmd_type, rq->errors);
 949         debug_log("sector: %ld, nr_sectors: %ld, "
 950                         "current_nr_sectors: %d\n", (long)rq->sector,
 951                         rq->nr_sectors, rq->current_nr_sectors);
 952
 953         if (rq->errors >= ERROR_MAX) {
 954                 if (floppy->failed_pc)
 955                         ide_floppy_report_error(floppy, floppy->failed_pc);
 956                 else
 957                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 958                                 drive->name);
 959                 idefloppy_do_end_request(drive, 0, 0);
 960                 return ide_stopped;
 961         }
 962         if (blk_fs_request(rq)) {
 963                 if (((long)rq->sector % floppy->bs_factor) ||
 964                     (rq->nr_sectors % floppy->bs_factor)) {
 965                         printk("%s: unsupported r/w request size\n",
 966                                 drive->name);
 967                         idefloppy_do_end_request(drive, 0, 0);
 968                         return ide_stopped;
 969                 }
 970                 pc = idefloppy_next_pc_storage(drive);
 971                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 972         } else if (blk_special_request(rq)) {
 973                 pc = (idefloppy_pc_t *) rq->buffer;
 974         } else if (blk_pc_request(rq)) {
 975                 pc = idefloppy_next_pc_storage(drive);
 976                 idefloppy_blockpc_cmd(floppy, pc, rq);
 977         } else {
 978                 blk_dump_rq_flags(rq,
 979                         "ide-floppy: unsupported command in queue");
 980                 idefloppy_do_end_request(drive, 0, 0);
 981                 return ide_stopped;
 982         }
 983
 984         pc->rq = rq;
 985         return idefloppy_issue_pc(drive, pc);
 986 }
 987
 988 /*
 989  *      idefloppy_queue_pc_tail adds a special packet command request to the
 990  *      tail of the request queue, and waits for it to be serviced.
 991  */
 992 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
 993 {
 994         struct ide_floppy_obj *floppy = drive->driver_data;
 995         struct request rq;
 996
 997         ide_init_drive_cmd (&rq);
 998         rq.buffer = (char *) pc;
 999         rq.cmd_type = REQ_TYPE_SPECIAL;
1000         rq.rq_disk = floppy->disk;
1001
1002         return ide_do_drive_cmd(drive, &rq, ide_wait);
1003 }
1004
1005 /*
1006  * Look at the flexible disk page parameters. We ignore the CHS capacity
1007  * parameters and use the LBA parameters instead.
1008  */
1009 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1010 {
1011         idefloppy_floppy_t *floppy = drive->driver_data;
1012         idefloppy_pc_t pc;
1013         u8 *page;
1014         int capacity, lba_capacity;
1015         u16 transfer_rate, sector_size, cyls, rpm;
1016         u8 heads, sectors;
1017
1018         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1019                                         MODE_SENSE_CURRENT);
1020
1021         if (idefloppy_queue_pc_tail(drive, &pc)) {
1022                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1023                                 " parameters\n");
1024                 return 1;
1025         }
1026         floppy->wp = !!(pc.buffer[3] & 0x80);
1027         set_disk_ro(floppy->disk, floppy->wp);
1028         page = &pc.buffer[8];
1029
1030         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1031         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1032         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1033         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1034         heads         = pc.buffer[8 + 4];
1035         sectors       = pc.buffer[8 + 5];
1036
1037         capacity = cyls * heads * sectors * sector_size;
1038
1039         if (memcmp(page, &floppy->flexible_disk_page, 32))
1040                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1041                                 "%d sector size, %d rpm\n",
1042                                 drive->name, capacity / 1024, cyls, heads,
1043                                 sectors, transfer_rate / 8, sector_size, rpm);
1044
1045         memcpy(&floppy->flexible_disk_page, page, 32);
1046         drive->bios_cyl = cyls;
1047         drive->bios_head = heads;
1048         drive->bios_sect = sectors;
1049         lba_capacity = floppy->blocks * floppy->block_size;
1050
1051         if (capacity < lba_capacity) {
1052                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1053                         "bytes, but the drive only handles %d\n",
1054                         drive->name, lba_capacity, capacity);
1055                 floppy->blocks = floppy->block_size ?
1056                         capacity / floppy->block_size : 0;
1057         }
1058         return 0;
1059 }
1060
1061 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1062 {
1063         idefloppy_floppy_t *floppy = drive->driver_data;
1064         idefloppy_pc_t pc;
1065
1066         floppy->srfp = 0;
1067         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1068                                                  MODE_SENSE_CURRENT);
1069
1070         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1071         if (idefloppy_queue_pc_tail(drive, &pc))
1072                 return 1;
1073
1074         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1075         return (0);
1076 }
1077
1078 /*
1079  * Determine if a media is present in the floppy drive, and if so, its LBA
1080  * capacity.
1081  */
1082 static int ide_floppy_get_capacity(ide_drive_t *drive)
1083 {
1084         idefloppy_floppy_t *floppy = drive->driver_data;
1085         idefloppy_pc_t pc;
1086         u8 *cap_desc;
1087         u8 header_len, desc_cnt;
1088         int i, rc = 1, blocks, length;
1089
1090         drive->bios_cyl = 0;
1091         drive->bios_head = drive->bios_sect = 0;
1092         floppy->blocks = 0;
1093         floppy->bs_factor = 1;
1094         set_capacity(floppy->disk, 0);
1095
1096         idefloppy_create_read_capacity_cmd(&pc);
1097         if (idefloppy_queue_pc_tail(drive, &pc)) {
1098                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1099                 return 1;
1100         }
1101         header_len = pc.buffer[3];
1102         cap_desc = &pc.buffer[4];
1103         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1104
1105         for (i = 0; i < desc_cnt; i++) {
1106                 unsigned int desc_start = 4 + i*8;
1107
1108                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1109                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1110
1111                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1112                                 i, blocks * length / 1024, blocks, length);
1113
1114                 if (i)
1115                         continue;
1116                 /*
1117                  * the code below is valid only for the 1st descriptor, ie i=0
1118                  */
1119
1120                 switch (pc.buffer[desc_start + 4] & 0x03) {
1121                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1122                 case CAPACITY_UNFORMATTED:
1123                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1124                                 /*
1125                                  * If it is not a clik drive, break out
1126                                  * (maintains previous driver behaviour)
1127                                  */
1128                                 break;
1129                 case CAPACITY_CURRENT:
1130                         /* Normal Zip/LS-120 disks */
1131                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1132                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1133                                         "sector size\n", drive->name,
1134                                         blocks * length / 1024, blocks, length);
1135                         memcpy(&floppy->cap_desc, cap_desc, 8);
1136
1137                         if (!length || length % 512) {
1138                                 printk(KERN_NOTICE "%s: %d bytes block size "
1139                                         "not supported\n", drive->name, length);
1140                         } else {
1141                                 floppy->blocks = blocks;
1142                                 floppy->block_size = length;
1143                                 floppy->bs_factor = length / 512;
1144                                 if (floppy->bs_factor != 1)
1145                                         printk(KERN_NOTICE "%s: warning: non "
1146                                                 "512 bytes block size not "
1147                                                 "fully supported\n",
1148                                                 drive->name);
1149                                 rc = 0;
1150                         }
1151                         break;
1152                 case CAPACITY_NO_CARTRIDGE:
1153                         /*
1154                          * This is a KERN_ERR so it appears on screen
1155                          * for the user to see
1156                          */
1157                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1158                         break;
1159                 case CAPACITY_INVALID:
1160                         printk(KERN_ERR "%s: Invalid capacity for disk "
1161                                 "in drive\n", drive->name);
1162                         break;
1163                 }
1164                 debug_log("Descriptor 0 Code: %d\n",
1165                           pc.buffer[desc_start + 4] & 0x03);
1166         }
1167
1168         /* Clik! disk does not support get_flexible_disk_page */
1169         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1170                 (void) ide_floppy_get_flexible_disk_page(drive);
1171
1172         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1173         return rc;
1174 }
1175
1176 /*
1177  * Obtain the list of formattable capacities.
1178  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1179  * descriptors to userland, instead of our own structures.
1180  *
1181  * Userland gives us the following structure:
1182  *
1183  * struct idefloppy_format_capacities {
1184  *      int nformats;
1185  *      struct {
1186  *              int nblocks;
1187  *              int blocksize;
1188  *      } formats[];
1189  * };
1190  *
1191  * userland initializes nformats to the number of allocated formats[] records.
1192  * On exit we set nformats to the number of records we've actually initialized.
1193  */
1194
1195 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1196 {
1197         idefloppy_pc_t pc;
1198         u8 header_len, desc_cnt;
1199         int i, blocks, length, u_array_size, u_index;
1200         int __user *argp;
1201
1202         if (get_user(u_array_size, arg))
1203                 return (-EFAULT);
1204
1205         if (u_array_size <= 0)
1206                 return (-EINVAL);
1207
1208         idefloppy_create_read_capacity_cmd(&pc);
1209         if (idefloppy_queue_pc_tail(drive, &pc)) {
1210                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1211                 return (-EIO);
1212         }
1213         header_len = pc.buffer[3];
1214         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1215
1216         u_index = 0;
1217         argp = arg + 1;
1218
1219         /*
1220          * We always skip the first capacity descriptor.  That's the current
1221          * capacity.  We are interested in the remaining descriptors, the
1222          * formattable capacities.
1223          */
1224         for (i = 1; i < desc_cnt; i++) {
1225                 unsigned int desc_start = 4 + i*8;
1226
1227                 if (u_index >= u_array_size)
1228                         break;  /* User-supplied buffer too small */
1229
1230                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1231                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1232
1233                 if (put_user(blocks, argp))
1234                         return(-EFAULT);
1235                 ++argp;
1236
1237                 if (put_user(length, argp))
1238                         return (-EFAULT);
1239                 ++argp;
1240
1241                 ++u_index;
1242         }
1243
1244         if (put_user(u_index, arg))
1245                 return (-EFAULT);
1246         return (0);
1247 }
1248
1249 /*
1250 ** Get ATAPI_FORMAT_UNIT progress indication.
1251 **
1252 ** Userland gives a pointer to an int.  The int is set to a progress
1253 ** indicator 0-65536, with 65536=100%.
1254 **
1255 ** If the drive does not support format progress indication, we just check
1256 ** the dsc bit, and return either 0 or 65536.
1257 */
1258
1259 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1260 {
1261         idefloppy_floppy_t *floppy = drive->driver_data;
1262         idefloppy_pc_t pc;
1263         int progress_indication = 0x10000;
1264
1265         if (floppy->srfp) {
1266                 idefloppy_create_request_sense_cmd(&pc);
1267                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1268                         return (-EIO);
1269                 }
1270
1271                 if (floppy->sense_key == 2 &&
1272                     floppy->asc == 4 &&
1273                     floppy->ascq == 4) {
1274                         progress_indication = floppy->progress_indication;
1275                 }
1276                 /* Else assume format_unit has finished, and we're
1277                 ** at 0x10000 */
1278         } else {
1279                 unsigned long flags;
1280                 u8 stat;
1281
1282                 local_irq_save(flags);
1283                 stat = drive->hwif->INB(IDE_STATUS_REG);
1284                 local_irq_restore(flags);
1285
1286                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1287         }
1288         if (put_user(progress_indication, arg))
1289                 return (-EFAULT);
1290
1291         return (0);
1292 }
1293
1294 /*
1295  *      Return the current floppy capacity.
1296  */
1297 static sector_t idefloppy_capacity (ide_drive_t *drive)
1298 {
1299         idefloppy_floppy_t *floppy = drive->driver_data;
1300         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1301
1302         return capacity;
1303 }
1304
1305 /*
1306  *      idefloppy_identify_device checks if we can support a drive,
1307  *      based on the ATAPI IDENTIFY command results.
1308  */
1309 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1310 {
1311         struct idefloppy_id_gcw gcw;
1312 #if IDEFLOPPY_DEBUG_INFO
1313         char buffer[80];
1314 #endif /* IDEFLOPPY_DEBUG_INFO */
1315
1316         *((u16 *) &gcw) = id->config;
1317
1318 #ifdef CONFIG_PPC
1319         /* kludge for Apple PowerBook internal zip */
1320         if ((gcw.device_type == 5) &&
1321             !strstr(id->model, "CD-ROM") &&
1322             strstr(id->model, "ZIP"))
1323                 gcw.device_type = 0;
1324 #endif
1325
1326 #if IDEFLOPPY_DEBUG_INFO
1327         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1328         switch (gcw.protocol) {
1329                 case 0: case 1: sprintf(buffer, "ATA");break;
1330                 case 2: sprintf(buffer, "ATAPI");break;
1331                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1332         }
1333         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1334         switch (gcw.device_type) {
1335                 case 0: sprintf(buffer, "Direct-access Device");break;
1336                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1337                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1338                 case 5: sprintf(buffer, "CD-ROM Device");break;
1339                 case 6: sprintf(buffer, "Reserved");
1340                 case 7: sprintf(buffer, "Optical memory Device");break;
1341                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1342                 default: sprintf(buffer, "Reserved");
1343         }
1344         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1345         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1346         switch (gcw.drq_type) {
1347                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1348                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1349                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1350                 case 3: sprintf(buffer, "Reserved");break;
1351         }
1352         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1353         switch (gcw.packet_size) {
1354                 case 0: sprintf(buffer, "12 bytes");break;
1355                 case 1: sprintf(buffer, "16 bytes");break;
1356                 default: sprintf(buffer, "Reserved");break;
1357         }
1358         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1359 #endif /* IDEFLOPPY_DEBUG_INFO */
1360
1361         if (gcw.protocol != 2)
1362                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1363         else if (gcw.device_type != 0)
1364                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1365         else if (!gcw.removable)
1366                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1367         else if (gcw.drq_type == 3) {
1368                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1369         } else if (gcw.packet_size != 0) {
1370                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1371         } else
1372                 return 1;
1373         return 0;
1374 }
1375
1376 #ifdef CONFIG_IDE_PROC_FS
1377 static void idefloppy_add_settings(ide_drive_t *drive)
1378 {
1379         idefloppy_floppy_t *floppy = drive->driver_data;
1380
1381 /*
1382  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1383  */
1384         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1385         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1386         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1387         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1388 }
1389 #else
1390 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1391 #endif
1392
1393 /*
1394  *      Driver initialization.
1395  */
1396 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1397 {
1398         struct idefloppy_id_gcw gcw;
1399
1400         *((u16 *) &gcw) = drive->id->config;
1401         floppy->pc = floppy->pc_stack;
1402         if (gcw.drq_type == 1)
1403                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1404         /*
1405          *      We used to check revisions here. At this point however
1406          *      I'm giving up. Just assume they are all broken, its easier.
1407          *
1408          *      The actual reason for the workarounds was likely
1409          *      a driver bug after all rather than a firmware bug,
1410          *      and the workaround below used to hide it. It should
1411          *      be fixed as of version 1.9, but to be on the safe side
1412          *      we'll leave the limitation below for the 2.2.x tree.
1413          */
1414
1415         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1416                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1417                 /* This value will be visible in the /proc/ide/hdx/settings */
1418                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1419                 blk_queue_max_sectors(drive->queue, 64);
1420         }
1421
1422         /*
1423         *      Guess what?  The IOMEGA Clik! drive also needs the
1424         *      above fix.  It makes nasty clicking noises without
1425         *      it, so please don't remove this.
1426         */
1427         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1428                 blk_queue_max_sectors(drive->queue, 64);
1429                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1430         }
1431
1432
1433         (void) ide_floppy_get_capacity(drive);
1434         idefloppy_add_settings(drive);
1435 }
1436
1437 static void ide_floppy_remove(ide_drive_t *drive)
1438 {
1439         idefloppy_floppy_t *floppy = drive->driver_data;
1440         struct gendisk *g = floppy->disk;
1441
1442         ide_proc_unregister_driver(drive, floppy->driver);
1443
1444         del_gendisk(g);
1445
1446         ide_floppy_put(floppy);
1447 }
1448
1449 static void idefloppy_cleanup_obj(struct kref *kref)
1450 {
1451         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1452         ide_drive_t *drive = floppy->drive;
1453         struct gendisk *g = floppy->disk;
1454
1455         drive->driver_data = NULL;
1456         g->private_data = NULL;
1457         put_disk(g);
1458         kfree(floppy);
1459 }
1460
1461 #ifdef CONFIG_IDE_PROC_FS
1462 static int proc_idefloppy_read_capacity
1463         (char *page, char **start, off_t off, int count, int *eof, void *data)
1464 {
1465         ide_drive_t*drive = (ide_drive_t *)data;
1466         int len;
1467
1468         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1469         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1470 }
1471
1472 static ide_proc_entry_t idefloppy_proc[] = {
1473         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1474         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1475         { NULL, 0, NULL, NULL }
1476 };
1477 #endif  /* CONFIG_IDE_PROC_FS */
1478
1479 static int ide_floppy_probe(ide_drive_t *);
1480
1481 static ide_driver_t idefloppy_driver = {
1482         .gen_driver = {
1483                 .owner          = THIS_MODULE,
1484                 .name           = "ide-floppy",
1485                 .bus            = &ide_bus_type,
1486         },
1487         .probe                  = ide_floppy_probe,
1488         .remove                 = ide_floppy_remove,
1489         .version                = IDEFLOPPY_VERSION,
1490         .media                  = ide_floppy,
1491         .supports_dsc_overlap   = 0,
1492         .do_request             = idefloppy_do_request,
1493         .end_request            = idefloppy_do_end_request,
1494         .error                  = __ide_error,
1495         .abort                  = __ide_abort,
1496 #ifdef CONFIG_IDE_PROC_FS
1497         .proc                   = idefloppy_proc,
1498 #endif
1499 };
1500
1501 static int idefloppy_open(struct inode *inode, struct file *filp)
1502 {
1503         struct gendisk *disk = inode->i_bdev->bd_disk;
1504         struct ide_floppy_obj *floppy;
1505         ide_drive_t *drive;
1506         idefloppy_pc_t pc;
1507         int ret = 0;
1508
1509         debug_log("Reached %s\n", __func__);
1510
1511         if (!(floppy = ide_floppy_get(disk)))
1512                 return -ENXIO;
1513
1514         drive = floppy->drive;
1515
1516         floppy->openers++;
1517
1518         if (floppy->openers == 1) {
1519                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1520                 /* Just in case */
1521
1522                 idefloppy_create_test_unit_ready_cmd(&pc);
1523                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1524                         idefloppy_create_start_stop_cmd(&pc, 1);
1525                         (void) idefloppy_queue_pc_tail(drive, &pc);
1526                 }
1527
1528                 if (ide_floppy_get_capacity(drive)
1529                    && (filp->f_flags & O_NDELAY) == 0
1530                     /*
1531                     ** Allow O_NDELAY to open a drive without a disk, or with
1532                     ** an unreadable disk, so that we can get the format
1533                     ** capacity of the drive or begin the format - Sam
1534                     */
1535                     ) {
1536                         ret = -EIO;
1537                         goto out_put_floppy;
1538                 }
1539
1540                 if (floppy->wp && (filp->f_mode & 2)) {
1541                         ret = -EROFS;
1542                         goto out_put_floppy;
1543                 }
1544                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1545                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1546                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1547                         idefloppy_create_prevent_cmd(&pc, 1);
1548                         (void) idefloppy_queue_pc_tail(drive, &pc);
1549                 }
1550                 check_disk_change(inode->i_bdev);
1551         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1552                 ret = -EBUSY;
1553                 goto out_put_floppy;
1554         }
1555         return 0;
1556
1557 out_put_floppy:
1558         floppy->openers--;
1559         ide_floppy_put(floppy);
1560         return ret;
1561 }
1562
1563 static int idefloppy_release(struct inode *inode, struct file *filp)
1564 {
1565         struct gendisk *disk = inode->i_bdev->bd_disk;
1566         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1567         ide_drive_t *drive = floppy->drive;
1568         idefloppy_pc_t pc;
1569
1570         debug_log("Reached %s\n", __func__);
1571
1572         if (floppy->openers == 1) {
1573                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1574                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1575                         idefloppy_create_prevent_cmd(&pc, 0);
1576                         (void) idefloppy_queue_pc_tail(drive, &pc);
1577                 }
1578
1579                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1580         }
1581
1582         floppy->openers--;
1583
1584         ide_floppy_put(floppy);
1585
1586         return 0;
1587 }
1588
1589 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1590 {
1591         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1592         ide_drive_t *drive = floppy->drive;
1593
1594         geo->heads = drive->bios_head;
1595         geo->sectors = drive->bios_sect;
1596         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1597         return 0;
1598 }
1599
1600 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1601                                unsigned long arg, unsigned int cmd)
1602 {
1603         if (floppy->openers > 1)
1604                 return -EBUSY;
1605
1606         /* The IOMEGA Clik! Drive doesn't support this command -
1607          * no room for an eject mechanism */
1608         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1609                 int prevent = arg ? 1 : 0;
1610
1611                 if (cmd == CDROMEJECT)
1612                         prevent = 0;
1613
1614                 idefloppy_create_prevent_cmd(pc, prevent);
1615                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1616         }
1617
1618         if (cmd == CDROMEJECT) {
1619                 idefloppy_create_start_stop_cmd(pc, 2);
1620                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1621         }
1622
1623         return 0;
1624 }
1625
1626 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1627                                   int __user *arg)
1628 {
1629         int blocks, length, flags, err = 0;
1630         idefloppy_pc_t pc;
1631
1632         if (floppy->openers > 1) {
1633                 /* Don't format if someone is using the disk */
1634                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1635                 return -EBUSY;
1636         }
1637
1638         set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1639
1640         /*
1641          * Send ATAPI_FORMAT_UNIT to the drive.
1642          *
1643          * Userland gives us the following structure:
1644          *
1645          * struct idefloppy_format_command {
1646          *        int nblocks;
1647          *        int blocksize;
1648          *        int flags;
1649          *        } ;
1650          *
1651          * flags is a bitmask, currently, the only defined flag is:
1652          *
1653          *        0x01 - verify media after format.
1654          */
1655         if (get_user(blocks, arg) ||
1656                         get_user(length, arg+1) ||
1657                         get_user(flags, arg+2)) {
1658                 err = -EFAULT;
1659                 goto out;
1660         }
1661
1662         (void) idefloppy_get_sfrp_bit(floppy->drive);
1663         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1664
1665         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1666                 err = -EIO;
1667
1668 out:
1669         if (err)
1670                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1671         return err;
1672 }
1673
1674
1675 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1676                         unsigned int cmd, unsigned long arg)
1677 {
1678         struct block_device *bdev = inode->i_bdev;
1679         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1680         ide_drive_t *drive = floppy->drive;
1681         idefloppy_pc_t pc;
1682         void __user *argp = (void __user *)arg;
1683         int err;
1684
1685         switch (cmd) {
1686         case CDROMEJECT:
1687                 /* fall through */
1688         case CDROM_LOCKDOOR:
1689                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1690         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1691                 return 0;
1692         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1693                 return ide_floppy_get_format_capacities(drive, argp);
1694         case IDEFLOPPY_IOCTL_FORMAT_START:
1695                 if (!(file->f_mode & 2))
1696                         return -EPERM;
1697
1698                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1699         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1700                 return idefloppy_get_format_progress(drive, argp);
1701         }
1702
1703         /*
1704          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1705          * and CDROM_SEND_PACKET (legacy) ioctls
1706          */
1707         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1708                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1709                                         bdev->bd_disk, cmd, argp);
1710         else
1711                 err = -ENOTTY;
1712
1713         if (err == -ENOTTY)
1714                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1715
1716         return err;
1717 }
1718
1719 static int idefloppy_media_changed(struct gendisk *disk)
1720 {
1721         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1722         ide_drive_t *drive = floppy->drive;
1723
1724         /* do not scan partitions twice if this is a removable device */
1725         if (drive->attach) {
1726                 drive->attach = 0;
1727                 return 0;
1728         }
1729         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1730 }
1731
1732 static int idefloppy_revalidate_disk(struct gendisk *disk)
1733 {
1734         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1735         set_capacity(disk, idefloppy_capacity(floppy->drive));
1736         return 0;
1737 }
1738
1739 static struct block_device_operations idefloppy_ops = {
1740         .owner          = THIS_MODULE,
1741         .open           = idefloppy_open,
1742         .release        = idefloppy_release,
1743         .ioctl          = idefloppy_ioctl,
1744         .getgeo         = idefloppy_getgeo,
1745         .media_changed  = idefloppy_media_changed,
1746         .revalidate_disk= idefloppy_revalidate_disk
1747 };
1748
1749 static int ide_floppy_probe(ide_drive_t *drive)
1750 {
1751         idefloppy_floppy_t *floppy;
1752         struct gendisk *g;
1753
1754         if (!strstr("ide-floppy", drive->driver_req))
1755                 goto failed;
1756         if (!drive->present)
1757                 goto failed;
1758         if (drive->media != ide_floppy)
1759                 goto failed;
1760         if (!idefloppy_identify_device (drive, drive->id)) {
1761                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1762                 goto failed;
1763         }
1764         if (drive->scsi) {
1765                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1766                 goto failed;
1767         }
1768         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1769                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1770                 goto failed;
1771         }
1772
1773         g = alloc_disk(1 << PARTN_BITS);
1774         if (!g)
1775                 goto out_free_floppy;
1776
1777         ide_init_disk(g, drive);
1778
1779         ide_proc_register_driver(drive, &idefloppy_driver);
1780
1781         kref_init(&floppy->kref);
1782
1783         floppy->drive = drive;
1784         floppy->driver = &idefloppy_driver;
1785         floppy->disk = g;
1786
1787         g->private_data = &floppy->driver;
1788
1789         drive->driver_data = floppy;
1790
1791         idefloppy_setup (drive, floppy);
1792
1793         g->minors = 1 << PARTN_BITS;
1794         g->driverfs_dev = &drive->gendev;
1795         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1796         g->fops = &idefloppy_ops;
1797         drive->attach = 1;
1798         add_disk(g);
1799         return 0;
1800
1801 out_free_floppy:
1802         kfree(floppy);
1803 failed:
1804         return -ENODEV;
1805 }
1806
1807 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1808
1809 static void __exit idefloppy_exit (void)
1810 {
1811         driver_unregister(&idefloppy_driver.gen_driver);
1812 }
1813
1814 static int __init idefloppy_init(void)
1815 {
1816         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1817         return driver_register(&idefloppy_driver.gen_driver);
1818 }
1819
1820 MODULE_ALIAS("ide:*m-floppy*");
1821 module_init(idefloppy_init);
1822 module_exit(idefloppy_exit);
1823 MODULE_LICENSE("GPL");