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