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  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define IDEFLOPPY_VERSION "1.00"
  19
  20 #include <linux/module.h>
  21 #include <linux/types.h>
  22 #include <linux/string.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/timer.h>
  26 #include <linux/mm.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/major.h>
  29 #include <linux/errno.h>
  30 #include <linux/genhd.h>
  31 #include <linux/slab.h>
  32 #include <linux/cdrom.h>
  33 #include <linux/ide.h>
  34 #include <linux/bitops.h>
  35 #include <linux/mutex.h>
  36
  37 #include <scsi/scsi_ioctl.h>
  38
  39 #include <asm/byteorder.h>
  40 #include <linux/irq.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/io.h>
  43 #include <asm/unaligned.h>
  44
  45 /* define to see debug info */
  46 #define IDEFLOPPY_DEBUG_LOG             0
  47
  48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  49 #define IDEFLOPPY_DEBUG(fmt, args...)
  50
  51 #if IDEFLOPPY_DEBUG_LOG
  52 #define debug_log(fmt, args...) \
  53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  54 #else
  55 #define debug_log(fmt, args...) do {} while (0)
  56 #endif
  57
  58
  59 /* Some drives require a longer irq timeout. */
  60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  61
  62 /*
  63  * After each failed packet command we issue a request sense command and retry
  64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  65  */
  66 #define IDEFLOPPY_MAX_PC_RETRIES        3
  67
  68 /*
  69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  70  * bytes.
  71  */
  72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  73
  74 /*
  75  * In various places in the driver, we need to allocate storage for packet
  76  * commands and requests, which will remain valid while we leave the driver to
  77  * wait for an interrupt or a timeout event.
  78  */
  79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  80
  81 /* format capacities descriptor codes */
  82 #define CAPACITY_INVALID        0x00
  83 #define CAPACITY_UNFORMATTED    0x01
  84 #define CAPACITY_CURRENT        0x02
  85 #define CAPACITY_NO_CARTRIDGE   0x03
  86
  87 /*
  88  * Most of our global data which we need to save even as we leave the driver
  89  * due to an interrupt or a timer event is stored in a variable of type
  90  * idefloppy_floppy_t, defined below.
  91  */
  92 typedef struct ide_floppy_obj {
  93         ide_drive_t     *drive;
  94         ide_driver_t    *driver;
  95         struct gendisk  *disk;
  96         struct kref     kref;
  97         unsigned int    openers;        /* protected by BKL for now */
  98
  99         /* Current packet command */
 100         struct ide_atapi_pc *pc;
 101         /* Last failed packet command */
 102         struct ide_atapi_pc *failed_pc;
 103         /* Packet command stack */
 104         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 105         /* Next free packet command storage space */
 106         int pc_stack_index;
 107         struct request rq_stack[IDEFLOPPY_PC_STACK];
 108         /* We implement a circular array */
 109         int rq_stack_index;
 110
 111         /* Last error information */
 112         u8 sense_key, asc, ascq;
 113         /* delay this long before sending packet command */
 114         u8 ticks;
 115         int progress_indication;
 116
 117         /* Device information */
 118         /* Current format */
 119         int blocks, block_size, bs_factor;
 120         /* Last format capacity descriptor */
 121         u8 cap_desc[8];
 122         /* Copy of the flexible disk page */
 123         u8 flexible_disk_page[32];
 124         /* Write protect */
 125         int wp;
 126         /* Supports format progress report */
 127         int srfp;
 128 } idefloppy_floppy_t;
 129
 130 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 131
 132 /* Defines for the MODE SENSE command */
 133 #define MODE_SENSE_CURRENT              0x00
 134 #define MODE_SENSE_CHANGEABLE           0x01
 135 #define MODE_SENSE_DEFAULT              0x02
 136 #define MODE_SENSE_SAVED                0x03
 137
 138 /* IOCTLs used in low-level formatting. */
 139 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 140 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 141 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 142 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 143
 144 /* Error code returned in rq->errors to the higher part of the driver. */
 145 #define IDEFLOPPY_ERROR_GENERAL         101
 146
 147 /*
 148  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 149  * See SFF-8070i spec.
 150  */
 151 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 152 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 153
 154 static DEFINE_MUTEX(idefloppy_ref_mutex);
 155
 156 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 157
 158 #define ide_floppy_g(disk) \
 159         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 160
 161 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 162 {
 163         struct ide_floppy_obj *floppy = NULL;
 164
 165         mutex_lock(&idefloppy_ref_mutex);
 166         floppy = ide_floppy_g(disk);
 167         if (floppy)
 168                 kref_get(&floppy->kref);
 169         mutex_unlock(&idefloppy_ref_mutex);
 170         return floppy;
 171 }
 172
 173 static void idefloppy_cleanup_obj(struct kref *);
 174
 175 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 176 {
 177         mutex_lock(&idefloppy_ref_mutex);
 178         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 179         mutex_unlock(&idefloppy_ref_mutex);
 180 }
 181
 182 /*
 183  * Used to finish servicing a request. For read/write requests, we will call
 184  * ide_end_request to pass to the next buffer.
 185  */
 186 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 187 {
 188         idefloppy_floppy_t *floppy = drive->driver_data;
 189         struct request *rq = HWGROUP(drive)->rq;
 190         int error;
 191
 192         debug_log("Reached %s\n", __func__);
 193
 194         switch (uptodate) {
 195         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 196         case 1: error = 0; break;
 197         default: error = uptodate;
 198         }
 199         if (error)
 200                 floppy->failed_pc = NULL;
 201         /* Why does this happen? */
 202         if (!rq)
 203                 return 0;
 204         if (!blk_special_request(rq)) {
 205                 /* our real local end request function */
 206                 ide_end_request(drive, uptodate, nsecs);
 207                 return 0;
 208         }
 209         rq->errors = error;
 210         /* fixme: need to move this local also */
 211         ide_end_drive_cmd(drive, 0, 0);
 212         return 0;
 213 }
 214
 215 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 216                                   unsigned int bcount, int direction)
 217 {
 218         ide_hwif_t *hwif = drive->hwif;
 219         struct request *rq = pc->rq;
 220         struct req_iterator iter;
 221         struct bio_vec *bvec;
 222         unsigned long flags;
 223         int count, done = 0;
 224         char *data;
 225
 226         rq_for_each_segment(bvec, rq, iter) {
 227                 if (!bcount)
 228                         break;
 229
 230                 count = min(bvec->bv_len, bcount);
 231
 232                 data = bvec_kmap_irq(bvec, &flags);
 233                 if (direction)
 234                         hwif->tp_ops->output_data(drive, NULL, data, count);
 235                 else
 236                         hwif->tp_ops->input_data(drive, NULL, data, count);
 237                 bvec_kunmap_irq(data, &flags);
 238
 239                 bcount -= count;
 240                 pc->b_count += count;
 241                 done += count;
 242         }
 243
 244         idefloppy_end_request(drive, 1, done >> 9);
 245
 246         if (bcount) {
 247                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 248                                 drive->name, __func__, bcount);
 249                 ide_pad_transfer(drive, direction, bcount);
 250         }
 251 }
 252
 253 static void idefloppy_update_buffers(ide_drive_t *drive,
 254                                 struct ide_atapi_pc *pc)
 255 {
 256         struct request *rq = pc->rq;
 257         struct bio *bio = rq->bio;
 258
 259         while ((bio = rq->bio) != NULL)
 260                 idefloppy_end_request(drive, 1, 0);
 261 }
 262
 263 /*
 264  * Generate a new packet command request in front of the request queue, before
 265  * the current request so that it will be processed immediately, on the next
 266  * pass through the driver.
 267  */
 268 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 269                 struct request *rq)
 270 {
 271         struct ide_floppy_obj *floppy = drive->driver_data;
 272
 273         blk_rq_init(NULL, rq);
 274         rq->buffer = (char *) pc;
 275         rq->cmd_type = REQ_TYPE_SPECIAL;
 276         rq->cmd_flags |= REQ_PREEMPT;
 277         rq->rq_disk = floppy->disk;
 278         memcpy(rq->cmd, pc->c, 12);
 279         ide_do_drive_cmd(drive, rq);
 280 }
 281
 282 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 283 {
 284         idefloppy_floppy_t *floppy = drive->driver_data;
 285
 286         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 287                 floppy->pc_stack_index = 0;
 288         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 289 }
 290
 291 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 292 {
 293         idefloppy_floppy_t *floppy = drive->driver_data;
 294
 295         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 296                 floppy->rq_stack_index = 0;
 297         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 298 }
 299
 300 static void ide_floppy_callback(ide_drive_t *drive)
 301 {
 302         idefloppy_floppy_t *floppy = drive->driver_data;
 303         struct ide_atapi_pc *pc = floppy->pc;
 304         int uptodate = pc->error ? 0 : 1;
 305
 306         debug_log("Reached %s\n", __func__);
 307
 308         if (floppy->failed_pc == pc)
 309                 floppy->failed_pc = NULL;
 310
 311         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 312             (pc->rq && blk_pc_request(pc->rq)))
 313                 uptodate = 1; /* FIXME */
 314         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 315                 u8 *buf = floppy->pc->buf;
 316
 317                 if (!pc->error) {
 318                         floppy->sense_key = buf[2] & 0x0F;
 319                         floppy->asc = buf[12];
 320                         floppy->ascq = buf[13];
 321                         floppy->progress_indication = buf[15] & 0x80 ?
 322                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 323
 324                         if (floppy->failed_pc)
 325                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 326
 327                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 328                                   floppy->sense_key, floppy->asc, floppy->ascq);
 329                 } else
 330                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 331                                         "Aborting request!\n");
 332         }
 333
 334         idefloppy_end_request(drive, uptodate, 0);
 335 }
 336
 337 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 338 {
 339         memset(pc, 0, sizeof(*pc));
 340         pc->buf = pc->pc_buf;
 341         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 342 }
 343
 344 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 345 {
 346         idefloppy_init_pc(pc);
 347         pc->c[0] = GPCMD_REQUEST_SENSE;
 348         pc->c[4] = 255;
 349         pc->req_xfer = 18;
 350 }
 351
 352 /*
 353  * Called when an error was detected during the last packet command. We queue a
 354  * request sense packet command in the head of the request list.
 355  */
 356 static void idefloppy_retry_pc(ide_drive_t *drive)
 357 {
 358         struct ide_atapi_pc *pc;
 359         struct request *rq;
 360
 361         (void)ide_read_error(drive);
 362         pc = idefloppy_next_pc_storage(drive);
 363         rq = idefloppy_next_rq_storage(drive);
 364         idefloppy_create_request_sense_cmd(pc);
 365         idefloppy_queue_pc_head(drive, pc, rq);
 366 }
 367
 368 /* The usual interrupt handler called during a packet command. */
 369 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 370 {
 371         idefloppy_floppy_t *floppy = drive->driver_data;
 372
 373         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 374                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 375                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 376 }
 377
 378 /*
 379  * What we have here is a classic case of a top half / bottom half interrupt
 380  * service routine. In interrupt mode, the device sends an interrupt to signal
 381  * that it is ready to receive a packet. However, we need to delay about 2-3
 382  * ticks before issuing the packet or we gets in trouble.
 383  */
 384 static int idefloppy_transfer_pc(ide_drive_t *drive)
 385 {
 386         idefloppy_floppy_t *floppy = drive->driver_data;
 387
 388         /* Send the actual packet */
 389         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 390
 391         /* Timeout for the packet command */
 392         return IDEFLOPPY_WAIT_CMD;
 393 }
 394
 395
 396 /*
 397  * Called as an interrupt (or directly). When the device says it's ready for a
 398  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 399  * transfer_pc.
 400  */
 401 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 402 {
 403         idefloppy_floppy_t *floppy = drive->driver_data;
 404         struct ide_atapi_pc *pc = floppy->pc;
 405         ide_expiry_t *expiry;
 406         unsigned int timeout;
 407
 408         /*
 409          * The following delay solves a problem with ATAPI Zip 100 drives
 410          * where the Busy flag was apparently being deasserted before the
 411          * unit was ready to receive data. This was happening on a
 412          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 413          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 414          * used until after the packet is moved in about 50 msec.
 415          */
 416         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 417                 timeout = floppy->ticks;
 418                 expiry = &idefloppy_transfer_pc;
 419         } else {
 420                 timeout = IDEFLOPPY_WAIT_CMD;
 421                 expiry = NULL;
 422         }
 423
 424         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 425 }
 426
 427 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 428                                     struct ide_atapi_pc *pc)
 429 {
 430         /* supress error messages resulting from Medium not present */
 431         if (floppy->sense_key == 0x02 &&
 432             floppy->asc       == 0x3a &&
 433             floppy->ascq      == 0x00)
 434                 return;
 435
 436         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 437                         "asc = %2x, ascq = %2x\n",
 438                         floppy->drive->name, pc->c[0], floppy->sense_key,
 439                         floppy->asc, floppy->ascq);
 440
 441 }
 442
 443 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 444                 struct ide_atapi_pc *pc)
 445 {
 446         idefloppy_floppy_t *floppy = drive->driver_data;
 447
 448         if (floppy->failed_pc == NULL &&
 449             pc->c[0] != GPCMD_REQUEST_SENSE)
 450                 floppy->failed_pc = pc;
 451         /* Set the current packet command */
 452         floppy->pc = pc;
 453
 454         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 455                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 456                         ide_floppy_report_error(floppy, pc);
 457                 /* Giving up */
 458                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 459
 460                 floppy->failed_pc = NULL;
 461                 drive->pc_callback(drive);
 462                 return ide_stopped;
 463         }
 464
 465         debug_log("Retry number - %d\n", pc->retries);
 466
 467         pc->retries++;
 468
 469         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 470                             IDEFLOPPY_WAIT_CMD, NULL);
 471 }
 472
 473 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 474 {
 475         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 476
 477         idefloppy_init_pc(pc);
 478         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 479         pc->c[4] = prevent;
 480 }
 481
 482 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 483 {
 484         idefloppy_init_pc(pc);
 485         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 486         pc->c[7] = 255;
 487         pc->c[8] = 255;
 488         pc->req_xfer = 255;
 489 }
 490
 491 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 492                 int l, int flags)
 493 {
 494         idefloppy_init_pc(pc);
 495         pc->c[0] = GPCMD_FORMAT_UNIT;
 496         pc->c[1] = 0x17;
 497
 498         memset(pc->buf, 0, 12);
 499         pc->buf[1] = 0xA2;
 500         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 501
 502         if (flags & 1)                          /* Verify bit on... */
 503                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 504         pc->buf[3] = 8;
 505
 506         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 507         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 508         pc->buf_size = 12;
 509         pc->flags |= PC_FLAG_WRITING;
 510 }
 511
 512 /* A mode sense command is used to "sense" floppy parameters. */
 513 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 514                 u8 page_code, u8 type)
 515 {
 516         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 517
 518         idefloppy_init_pc(pc);
 519         pc->c[0] = GPCMD_MODE_SENSE_10;
 520         pc->c[1] = 0;
 521         pc->c[2] = page_code + (type << 6);
 522
 523         switch (page_code) {
 524         case IDEFLOPPY_CAPABILITIES_PAGE:
 525                 length += 12;
 526                 break;
 527         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 528                 length += 32;
 529                 break;
 530         default:
 531                 printk(KERN_ERR "ide-floppy: unsupported page code "
 532                                 "in create_mode_sense_cmd\n");
 533         }
 534         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 535         pc->req_xfer = length;
 536 }
 537
 538 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 539 {
 540         idefloppy_init_pc(pc);
 541         pc->c[0] = GPCMD_START_STOP_UNIT;
 542         pc->c[4] = start;
 543 }
 544
 545 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 546                                     struct ide_atapi_pc *pc, struct request *rq,
 547                                     unsigned long sector)
 548 {
 549         int block = sector / floppy->bs_factor;
 550         int blocks = rq->nr_sectors / floppy->bs_factor;
 551         int cmd = rq_data_dir(rq);
 552
 553         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 554                 block, blocks);
 555
 556         idefloppy_init_pc(pc);
 557         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 558         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 559         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 560
 561         memcpy(rq->cmd, pc->c, 12);
 562
 563         pc->rq = rq;
 564         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 565         if (rq->cmd_flags & REQ_RW)
 566                 pc->flags |= PC_FLAG_WRITING;
 567         pc->buf = NULL;
 568         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 569         pc->flags |= PC_FLAG_DMA_OK;
 570 }
 571
 572 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 573                 struct ide_atapi_pc *pc, struct request *rq)
 574 {
 575         idefloppy_init_pc(pc);
 576         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 577         pc->rq = rq;
 578         pc->b_count = rq->data_len;
 579         if (rq->data_len && rq_data_dir(rq) == WRITE)
 580                 pc->flags |= PC_FLAG_WRITING;
 581         pc->buf = rq->data;
 582         if (rq->bio)
 583                 pc->flags |= PC_FLAG_DMA_OK;
 584         /*
 585          * possibly problematic, doesn't look like ide-floppy correctly
 586          * handled scattered requests if dma fails...
 587          */
 588         pc->req_xfer = pc->buf_size = rq->data_len;
 589 }
 590
 591 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 592                 struct request *rq, sector_t block_s)
 593 {
 594         idefloppy_floppy_t *floppy = drive->driver_data;
 595         struct ide_atapi_pc *pc;
 596         unsigned long block = (unsigned long)block_s;
 597
 598         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 599                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 600                         rq->cmd_type, rq->errors);
 601         debug_log("sector: %ld, nr_sectors: %ld, "
 602                         "current_nr_sectors: %d\n", (long)rq->sector,
 603                         rq->nr_sectors, rq->current_nr_sectors);
 604
 605         if (rq->errors >= ERROR_MAX) {
 606                 if (floppy->failed_pc)
 607                         ide_floppy_report_error(floppy, floppy->failed_pc);
 608                 else
 609                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 610                                 drive->name);
 611                 idefloppy_end_request(drive, 0, 0);
 612                 return ide_stopped;
 613         }
 614         if (blk_fs_request(rq)) {
 615                 if (((long)rq->sector % floppy->bs_factor) ||
 616                     (rq->nr_sectors % floppy->bs_factor)) {
 617                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 618                                         drive->name);
 619                         idefloppy_end_request(drive, 0, 0);
 620                         return ide_stopped;
 621                 }
 622                 pc = idefloppy_next_pc_storage(drive);
 623                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 624         } else if (blk_special_request(rq)) {
 625                 pc = (struct ide_atapi_pc *) rq->buffer;
 626         } else if (blk_pc_request(rq)) {
 627                 pc = idefloppy_next_pc_storage(drive);
 628                 idefloppy_blockpc_cmd(floppy, pc, rq);
 629         } else {
 630                 blk_dump_rq_flags(rq,
 631                         "ide-floppy: unsupported command in queue");
 632                 idefloppy_end_request(drive, 0, 0);
 633                 return ide_stopped;
 634         }
 635
 636         pc->rq = rq;
 637
 638         return idefloppy_issue_pc(drive, pc);
 639 }
 640
 641 /*
 642  * Add a special packet command request to the tail of the request queue,
 643  * and wait for it to be serviced.
 644  */
 645 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 646 {
 647         struct ide_floppy_obj *floppy = drive->driver_data;
 648         struct request *rq;
 649         int error;
 650
 651         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 652         rq->buffer = (char *) pc;
 653         rq->cmd_type = REQ_TYPE_SPECIAL;
 654         memcpy(rq->cmd, pc->c, 12);
 655         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 656         blk_put_request(rq);
 657
 658         return error;
 659 }
 660
 661 /*
 662  * Look at the flexible disk page parameters. We ignore the CHS capacity
 663  * parameters and use the LBA parameters instead.
 664  */
 665 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 666 {
 667         idefloppy_floppy_t *floppy = drive->driver_data;
 668         struct ide_atapi_pc pc;
 669         u8 *page;
 670         int capacity, lba_capacity;
 671         u16 transfer_rate, sector_size, cyls, rpm;
 672         u8 heads, sectors;
 673
 674         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 675                                         MODE_SENSE_CURRENT);
 676
 677         if (idefloppy_queue_pc_tail(drive, &pc)) {
 678                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 679                                 " parameters\n");
 680                 return 1;
 681         }
 682         floppy->wp = !!(pc.buf[3] & 0x80);
 683         set_disk_ro(floppy->disk, floppy->wp);
 684         page = &pc.buf[8];
 685
 686         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 687         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 688         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 689         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 690         heads         = pc.buf[8 + 4];
 691         sectors       = pc.buf[8 + 5];
 692
 693         capacity = cyls * heads * sectors * sector_size;
 694
 695         if (memcmp(page, &floppy->flexible_disk_page, 32))
 696                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 697                                 "%d sector size, %d rpm\n",
 698                                 drive->name, capacity / 1024, cyls, heads,
 699                                 sectors, transfer_rate / 8, sector_size, rpm);
 700
 701         memcpy(&floppy->flexible_disk_page, page, 32);
 702         drive->bios_cyl = cyls;
 703         drive->bios_head = heads;
 704         drive->bios_sect = sectors;
 705         lba_capacity = floppy->blocks * floppy->block_size;
 706
 707         if (capacity < lba_capacity) {
 708                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 709                         "bytes, but the drive only handles %d\n",
 710                         drive->name, lba_capacity, capacity);
 711                 floppy->blocks = floppy->block_size ?
 712                         capacity / floppy->block_size : 0;
 713         }
 714         return 0;
 715 }
 716
 717 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 718 {
 719         idefloppy_floppy_t *floppy = drive->driver_data;
 720         struct ide_atapi_pc pc;
 721
 722         floppy->srfp = 0;
 723         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 724                                                  MODE_SENSE_CURRENT);
 725
 726         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 727         if (idefloppy_queue_pc_tail(drive, &pc))
 728                 return 1;
 729
 730         floppy->srfp = pc.buf[8 + 2] & 0x40;
 731         return (0);
 732 }
 733
 734 /*
 735  * Determine if a media is present in the floppy drive, and if so, its LBA
 736  * capacity.
 737  */
 738 static int ide_floppy_get_capacity(ide_drive_t *drive)
 739 {
 740         idefloppy_floppy_t *floppy = drive->driver_data;
 741         struct ide_atapi_pc pc;
 742         u8 *cap_desc;
 743         u8 header_len, desc_cnt;
 744         int i, rc = 1, blocks, length;
 745
 746         drive->bios_cyl = 0;
 747         drive->bios_head = drive->bios_sect = 0;
 748         floppy->blocks = 0;
 749         floppy->bs_factor = 1;
 750         set_capacity(floppy->disk, 0);
 751
 752         idefloppy_create_read_capacity_cmd(&pc);
 753         if (idefloppy_queue_pc_tail(drive, &pc)) {
 754                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 755                 return 1;
 756         }
 757         header_len = pc.buf[3];
 758         cap_desc = &pc.buf[4];
 759         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 760
 761         for (i = 0; i < desc_cnt; i++) {
 762                 unsigned int desc_start = 4 + i*8;
 763
 764                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 765                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 766
 767                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 768                                 i, blocks * length / 1024, blocks, length);
 769
 770                 if (i)
 771                         continue;
 772                 /*
 773                  * the code below is valid only for the 1st descriptor, ie i=0
 774                  */
 775
 776                 switch (pc.buf[desc_start + 4] & 0x03) {
 777                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 778                 case CAPACITY_UNFORMATTED:
 779                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 780                                 /*
 781                                  * If it is not a clik drive, break out
 782                                  * (maintains previous driver behaviour)
 783                                  */
 784                                 break;
 785                 case CAPACITY_CURRENT:
 786                         /* Normal Zip/LS-120 disks */
 787                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 788                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 789                                         "sector size\n", drive->name,
 790                                         blocks * length / 1024, blocks, length);
 791                         memcpy(&floppy->cap_desc, cap_desc, 8);
 792
 793                         if (!length || length % 512) {
 794                                 printk(KERN_NOTICE "%s: %d bytes block size "
 795                                         "not supported\n", drive->name, length);
 796                         } else {
 797                                 floppy->blocks = blocks;
 798                                 floppy->block_size = length;
 799                                 floppy->bs_factor = length / 512;
 800                                 if (floppy->bs_factor != 1)
 801                                         printk(KERN_NOTICE "%s: warning: non "
 802                                                 "512 bytes block size not "
 803                                                 "fully supported\n",
 804                                                 drive->name);
 805                                 rc = 0;
 806                         }
 807                         break;
 808                 case CAPACITY_NO_CARTRIDGE:
 809                         /*
 810                          * This is a KERN_ERR so it appears on screen
 811                          * for the user to see
 812                          */
 813                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 814                         break;
 815                 case CAPACITY_INVALID:
 816                         printk(KERN_ERR "%s: Invalid capacity for disk "
 817                                 "in drive\n", drive->name);
 818                         break;
 819                 }
 820                 debug_log("Descriptor 0 Code: %d\n",
 821                           pc.buf[desc_start + 4] & 0x03);
 822         }
 823
 824         /* Clik! disk does not support get_flexible_disk_page */
 825         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 826                 (void) ide_floppy_get_flexible_disk_page(drive);
 827
 828         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 829         return rc;
 830 }
 831
 832 /*
 833  * Obtain the list of formattable capacities.
 834  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 835  * descriptors to userland, instead of our own structures.
 836  *
 837  * Userland gives us the following structure:
 838  *
 839  * struct idefloppy_format_capacities {
 840  *      int nformats;
 841  *      struct {
 842  *              int nblocks;
 843  *              int blocksize;
 844  *      } formats[];
 845  * };
 846  *
 847  * userland initializes nformats to the number of allocated formats[] records.
 848  * On exit we set nformats to the number of records we've actually initialized.
 849  */
 850
 851 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 852 {
 853         struct ide_atapi_pc pc;
 854         u8 header_len, desc_cnt;
 855         int i, blocks, length, u_array_size, u_index;
 856         int __user *argp;
 857
 858         if (get_user(u_array_size, arg))
 859                 return (-EFAULT);
 860
 861         if (u_array_size <= 0)
 862                 return (-EINVAL);
 863
 864         idefloppy_create_read_capacity_cmd(&pc);
 865         if (idefloppy_queue_pc_tail(drive, &pc)) {
 866                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 867                 return (-EIO);
 868         }
 869         header_len = pc.buf[3];
 870         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 871
 872         u_index = 0;
 873         argp = arg + 1;
 874
 875         /*
 876          * We always skip the first capacity descriptor.  That's the current
 877          * capacity.  We are interested in the remaining descriptors, the
 878          * formattable capacities.
 879          */
 880         for (i = 1; i < desc_cnt; i++) {
 881                 unsigned int desc_start = 4 + i*8;
 882
 883                 if (u_index >= u_array_size)
 884                         break;  /* User-supplied buffer too small */
 885
 886                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 887                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 888
 889                 if (put_user(blocks, argp))
 890                         return(-EFAULT);
 891                 ++argp;
 892
 893                 if (put_user(length, argp))
 894                         return (-EFAULT);
 895                 ++argp;
 896
 897                 ++u_index;
 898         }
 899
 900         if (put_user(u_index, arg))
 901                 return (-EFAULT);
 902         return (0);
 903 }
 904
 905 /*
 906  * Get ATAPI_FORMAT_UNIT progress indication.
 907  *
 908  * Userland gives a pointer to an int.  The int is set to a progress
 909  * indicator 0-65536, with 65536=100%.
 910  *
 911  * If the drive does not support format progress indication, we just check
 912  * the dsc bit, and return either 0 or 65536.
 913  */
 914
 915 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 916 {
 917         idefloppy_floppy_t *floppy = drive->driver_data;
 918         struct ide_atapi_pc pc;
 919         int progress_indication = 0x10000;
 920
 921         if (floppy->srfp) {
 922                 idefloppy_create_request_sense_cmd(&pc);
 923                 if (idefloppy_queue_pc_tail(drive, &pc))
 924                         return (-EIO);
 925
 926                 if (floppy->sense_key == 2 &&
 927                     floppy->asc == 4 &&
 928                     floppy->ascq == 4)
 929                         progress_indication = floppy->progress_indication;
 930
 931                 /* Else assume format_unit has finished, and we're at 0x10000 */
 932         } else {
 933                 ide_hwif_t *hwif = drive->hwif;
 934                 unsigned long flags;
 935                 u8 stat;
 936
 937                 local_irq_save(flags);
 938                 stat = hwif->tp_ops->read_status(hwif);
 939                 local_irq_restore(flags);
 940
 941                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
 942         }
 943         if (put_user(progress_indication, arg))
 944                 return (-EFAULT);
 945
 946         return (0);
 947 }
 948
 949 static sector_t idefloppy_capacity(ide_drive_t *drive)
 950 {
 951         idefloppy_floppy_t *floppy = drive->driver_data;
 952         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 953
 954         return capacity;
 955 }
 956
 957 /*
 958  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
 959  * results.
 960  */
 961 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
 962 {
 963         u8 gcw[2];
 964         u8 device_type, protocol, removable, drq_type, packet_size;
 965
 966         *((u16 *) &gcw) = id->config;
 967
 968         device_type =  gcw[1] & 0x1F;
 969         removable   = (gcw[0] & 0x80) >> 7;
 970         protocol    = (gcw[1] & 0xC0) >> 6;
 971         drq_type    = (gcw[0] & 0x60) >> 5;
 972         packet_size =  gcw[0] & 0x03;
 973
 974 #ifdef CONFIG_PPC
 975         /* kludge for Apple PowerBook internal zip */
 976         if (device_type == 5 &&
 977             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
 978                 device_type = 0;
 979 #endif
 980
 981         if (protocol != 2)
 982                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
 983                         protocol);
 984         else if (device_type != 0)
 985                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
 986                                 "to floppy\n", device_type);
 987         else if (!removable)
 988                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
 989         else if (drq_type == 3)
 990                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
 991                                 "supported\n", drq_type);
 992         else if (packet_size != 0)
 993                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
 994                                 "bytes\n", packet_size);
 995         else
 996                 return 1;
 997         return 0;
 998 }
 999
1000 #ifdef CONFIG_IDE_PROC_FS
1001 static void idefloppy_add_settings(ide_drive_t *drive)
1002 {
1003         idefloppy_floppy_t *floppy = drive->driver_data;
1004
1005         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1006                         &drive->bios_cyl, NULL);
1007         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1008                         &drive->bios_head, NULL);
1009         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1010                         &drive->bios_sect, NULL);
1011         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1012                         &floppy->ticks,  NULL);
1013 }
1014 #else
1015 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1016 #endif
1017
1018 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1019 {
1020         u8 gcw[2];
1021
1022         *((u16 *) &gcw) = drive->id->config;
1023         floppy->pc = floppy->pc_stack;
1024         drive->pc_callback = ide_floppy_callback;
1025
1026         if (((gcw[0] & 0x60) >> 5) == 1)
1027                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1028         /*
1029          * We used to check revisions here. At this point however I'm giving up.
1030          * Just assume they are all broken, its easier.
1031          *
1032          * The actual reason for the workarounds was likely a driver bug after
1033          * all rather than a firmware bug, and the workaround below used to hide
1034          * it. It should be fixed as of version 1.9, but to be on the safe side
1035          * we'll leave the limitation below for the 2.2.x tree.
1036          */
1037         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1038                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1039                 /* This value will be visible in the /proc/ide/hdx/settings */
1040                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1041                 blk_queue_max_sectors(drive->queue, 64);
1042         }
1043
1044         /*
1045          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1046          * nasty clicking noises without it, so please don't remove this.
1047          */
1048         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1049                 blk_queue_max_sectors(drive->queue, 64);
1050                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1051         }
1052
1053         (void) ide_floppy_get_capacity(drive);
1054         idefloppy_add_settings(drive);
1055 }
1056
1057 static void ide_floppy_remove(ide_drive_t *drive)
1058 {
1059         idefloppy_floppy_t *floppy = drive->driver_data;
1060         struct gendisk *g = floppy->disk;
1061
1062         ide_proc_unregister_driver(drive, floppy->driver);
1063
1064         del_gendisk(g);
1065
1066         ide_floppy_put(floppy);
1067 }
1068
1069 static void idefloppy_cleanup_obj(struct kref *kref)
1070 {
1071         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1072         ide_drive_t *drive = floppy->drive;
1073         struct gendisk *g = floppy->disk;
1074
1075         drive->driver_data = NULL;
1076         g->private_data = NULL;
1077         put_disk(g);
1078         kfree(floppy);
1079 }
1080
1081 #ifdef CONFIG_IDE_PROC_FS
1082 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1083                 int count, int *eof, void *data)
1084 {
1085         ide_drive_t*drive = (ide_drive_t *)data;
1086         int len;
1087
1088         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1089         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1090 }
1091
1092 static ide_proc_entry_t idefloppy_proc[] = {
1093         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1094         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1095         { NULL, 0, NULL, NULL }
1096 };
1097 #endif  /* CONFIG_IDE_PROC_FS */
1098
1099 static int ide_floppy_probe(ide_drive_t *);
1100
1101 static ide_driver_t idefloppy_driver = {
1102         .gen_driver = {
1103                 .owner          = THIS_MODULE,
1104                 .name           = "ide-floppy",
1105                 .bus            = &ide_bus_type,
1106         },
1107         .probe                  = ide_floppy_probe,
1108         .remove                 = ide_floppy_remove,
1109         .version                = IDEFLOPPY_VERSION,
1110         .media                  = ide_floppy,
1111         .supports_dsc_overlap   = 0,
1112         .do_request             = idefloppy_do_request,
1113         .end_request            = idefloppy_end_request,
1114         .error                  = __ide_error,
1115 #ifdef CONFIG_IDE_PROC_FS
1116         .proc                   = idefloppy_proc,
1117 #endif
1118 };
1119
1120 static int idefloppy_open(struct inode *inode, struct file *filp)
1121 {
1122         struct gendisk *disk = inode->i_bdev->bd_disk;
1123         struct ide_floppy_obj *floppy;
1124         ide_drive_t *drive;
1125         struct ide_atapi_pc pc;
1126         int ret = 0;
1127
1128         debug_log("Reached %s\n", __func__);
1129
1130         floppy = ide_floppy_get(disk);
1131         if (!floppy)
1132                 return -ENXIO;
1133
1134         drive = floppy->drive;
1135
1136         floppy->openers++;
1137
1138         if (floppy->openers == 1) {
1139                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1140                 /* Just in case */
1141
1142                 idefloppy_init_pc(&pc);
1143                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1144
1145                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1146                         idefloppy_create_start_stop_cmd(&pc, 1);
1147                         (void) idefloppy_queue_pc_tail(drive, &pc);
1148                 }
1149
1150                 if (ide_floppy_get_capacity(drive)
1151                    && (filp->f_flags & O_NDELAY) == 0
1152                     /*
1153                      * Allow O_NDELAY to open a drive without a disk, or with an
1154                      * unreadable disk, so that we can get the format capacity
1155                      * of the drive or begin the format - Sam
1156                      */
1157                     ) {
1158                         ret = -EIO;
1159                         goto out_put_floppy;
1160                 }
1161
1162                 if (floppy->wp && (filp->f_mode & 2)) {
1163                         ret = -EROFS;
1164                         goto out_put_floppy;
1165                 }
1166                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1167                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1168                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1169                         idefloppy_create_prevent_cmd(&pc, 1);
1170                         (void) idefloppy_queue_pc_tail(drive, &pc);
1171                 }
1172                 check_disk_change(inode->i_bdev);
1173         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1174                 ret = -EBUSY;
1175                 goto out_put_floppy;
1176         }
1177         return 0;
1178
1179 out_put_floppy:
1180         floppy->openers--;
1181         ide_floppy_put(floppy);
1182         return ret;
1183 }
1184
1185 static int idefloppy_release(struct inode *inode, struct file *filp)
1186 {
1187         struct gendisk *disk = inode->i_bdev->bd_disk;
1188         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1189         ide_drive_t *drive = floppy->drive;
1190         struct ide_atapi_pc pc;
1191
1192         debug_log("Reached %s\n", __func__);
1193
1194         if (floppy->openers == 1) {
1195                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1196                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1197                         idefloppy_create_prevent_cmd(&pc, 0);
1198                         (void) idefloppy_queue_pc_tail(drive, &pc);
1199                 }
1200
1201                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1202         }
1203
1204         floppy->openers--;
1205
1206         ide_floppy_put(floppy);
1207
1208         return 0;
1209 }
1210
1211 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1212 {
1213         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1214         ide_drive_t *drive = floppy->drive;
1215
1216         geo->heads = drive->bios_head;
1217         geo->sectors = drive->bios_sect;
1218         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1219         return 0;
1220 }
1221
1222 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1223                                unsigned long arg, unsigned int cmd)
1224 {
1225         idefloppy_floppy_t *floppy = drive->driver_data;
1226
1227         if (floppy->openers > 1)
1228                 return -EBUSY;
1229
1230         /* The IOMEGA Clik! Drive doesn't support this command -
1231          * no room for an eject mechanism */
1232         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1233                 int prevent = arg ? 1 : 0;
1234
1235                 if (cmd == CDROMEJECT)
1236                         prevent = 0;
1237
1238                 idefloppy_create_prevent_cmd(pc, prevent);
1239                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1240         }
1241
1242         if (cmd == CDROMEJECT) {
1243                 idefloppy_create_start_stop_cmd(pc, 2);
1244                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1245         }
1246
1247         return 0;
1248 }
1249
1250 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1251                                   int __user *arg)
1252 {
1253         struct ide_atapi_pc pc;
1254         ide_drive_t *drive = floppy->drive;
1255         int blocks, length, flags, err = 0;
1256
1257         if (floppy->openers > 1) {
1258                 /* Don't format if someone is using the disk */
1259                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1260                 return -EBUSY;
1261         }
1262
1263         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1264
1265         /*
1266          * Send ATAPI_FORMAT_UNIT to the drive.
1267          *
1268          * Userland gives us the following structure:
1269          *
1270          * struct idefloppy_format_command {
1271          *        int nblocks;
1272          *        int blocksize;
1273          *        int flags;
1274          *        } ;
1275          *
1276          * flags is a bitmask, currently, the only defined flag is:
1277          *
1278          *        0x01 - verify media after format.
1279          */
1280         if (get_user(blocks, arg) ||
1281                         get_user(length, arg+1) ||
1282                         get_user(flags, arg+2)) {
1283                 err = -EFAULT;
1284                 goto out;
1285         }
1286
1287         (void) idefloppy_get_sfrp_bit(drive);
1288         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1289
1290         if (idefloppy_queue_pc_tail(drive, &pc))
1291                 err = -EIO;
1292
1293 out:
1294         if (err)
1295                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1296         return err;
1297 }
1298
1299
1300 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1301                         unsigned int cmd, unsigned long arg)
1302 {
1303         struct block_device *bdev = inode->i_bdev;
1304         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1305         ide_drive_t *drive = floppy->drive;
1306         struct ide_atapi_pc pc;
1307         void __user *argp = (void __user *)arg;
1308         int err;
1309
1310         switch (cmd) {
1311         case CDROMEJECT:
1312                 /* fall through */
1313         case CDROM_LOCKDOOR:
1314                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1315         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1316                 return 0;
1317         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1318                 return ide_floppy_get_format_capacities(drive, argp);
1319         case IDEFLOPPY_IOCTL_FORMAT_START:
1320                 if (!(file->f_mode & 2))
1321                         return -EPERM;
1322
1323                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1324         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1325                 return idefloppy_get_format_progress(drive, argp);
1326         }
1327
1328         /*
1329          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1330          * and CDROM_SEND_PACKET (legacy) ioctls
1331          */
1332         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1333                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1334                                         bdev->bd_disk, cmd, argp);
1335         else
1336                 err = -ENOTTY;
1337
1338         if (err == -ENOTTY)
1339                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1340
1341         return err;
1342 }
1343
1344 static int idefloppy_media_changed(struct gendisk *disk)
1345 {
1346         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1347         ide_drive_t *drive = floppy->drive;
1348         int ret;
1349
1350         /* do not scan partitions twice if this is a removable device */
1351         if (drive->attach) {
1352                 drive->attach = 0;
1353                 return 0;
1354         }
1355         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1356         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1357         return ret;
1358 }
1359
1360 static int idefloppy_revalidate_disk(struct gendisk *disk)
1361 {
1362         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1363         set_capacity(disk, idefloppy_capacity(floppy->drive));
1364         return 0;
1365 }
1366
1367 static struct block_device_operations idefloppy_ops = {
1368         .owner                  = THIS_MODULE,
1369         .open                   = idefloppy_open,
1370         .release                = idefloppy_release,
1371         .ioctl                  = idefloppy_ioctl,
1372         .getgeo                 = idefloppy_getgeo,
1373         .media_changed          = idefloppy_media_changed,
1374         .revalidate_disk        = idefloppy_revalidate_disk
1375 };
1376
1377 static int ide_floppy_probe(ide_drive_t *drive)
1378 {
1379         idefloppy_floppy_t *floppy;
1380         struct gendisk *g;
1381
1382         if (!strstr("ide-floppy", drive->driver_req))
1383                 goto failed;
1384         if (!drive->present)
1385                 goto failed;
1386         if (drive->media != ide_floppy)
1387                 goto failed;
1388         if (!idefloppy_identify_device(drive, drive->id)) {
1389                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1390                                 " of ide-floppy\n", drive->name);
1391                 goto failed;
1392         }
1393         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1394         if (!floppy) {
1395                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1396                                 " structure\n", drive->name);
1397                 goto failed;
1398         }
1399
1400         g = alloc_disk(1 << PARTN_BITS);
1401         if (!g)
1402                 goto out_free_floppy;
1403
1404         ide_init_disk(g, drive);
1405
1406         ide_proc_register_driver(drive, &idefloppy_driver);
1407
1408         kref_init(&floppy->kref);
1409
1410         floppy->drive = drive;
1411         floppy->driver = &idefloppy_driver;
1412         floppy->disk = g;
1413
1414         g->private_data = &floppy->driver;
1415
1416         drive->driver_data = floppy;
1417
1418         idefloppy_setup(drive, floppy);
1419
1420         g->minors = 1 << PARTN_BITS;
1421         g->driverfs_dev = &drive->gendev;
1422         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1423         g->fops = &idefloppy_ops;
1424         drive->attach = 1;
1425         add_disk(g);
1426         return 0;
1427
1428 out_free_floppy:
1429         kfree(floppy);
1430 failed:
1431         return -ENODEV;
1432 }
1433
1434 static void __exit idefloppy_exit(void)
1435 {
1436         driver_unregister(&idefloppy_driver.gen_driver);
1437 }
1438
1439 static int __init idefloppy_init(void)
1440 {
1441         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1442         return driver_register(&idefloppy_driver.gen_driver);
1443 }
1444
1445 MODULE_ALIAS("ide:*m-floppy*");
1446 module_init(idefloppy_init);
1447 module_exit(idefloppy_exit);
1448 MODULE_LICENSE("GPL");
1449 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1450