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   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 #include <linux/scatterlist.h>
  40
  41 #include <scsi/scsi_ioctl.h>
  42
  43 #include <asm/byteorder.h>
  44 #include <linux/irq.h>
  45 #include <linux/uaccess.h>
  46 #include <linux/io.h>
  47 #include <asm/unaligned.h>
  48
  49 /* define to see debug info */
  50 #define IDEFLOPPY_DEBUG_LOG             0
  51
  52 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  53 #define IDEFLOPPY_DEBUG(fmt, args...)
  54
  55 #if IDEFLOPPY_DEBUG_LOG
  56 #define debug_log(fmt, args...) \
  57         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  58 #else
  59 #define debug_log(fmt, args...) do {} while (0)
  60 #endif
  61
  62
  63 /* Some drives require a longer irq timeout. */
  64 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  65
  66 /*
  67  * After each failed packet command we issue a request sense command and retry
  68  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  69  */
  70 #define IDEFLOPPY_MAX_PC_RETRIES        3
  71
  72 /*
  73  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  74  * bytes.
  75  */
  76 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  77
  78 /* format capacities descriptor codes */
  79 #define CAPACITY_INVALID        0x00
  80 #define CAPACITY_UNFORMATTED    0x01
  81 #define CAPACITY_CURRENT        0x02
  82 #define CAPACITY_NO_CARTRIDGE   0x03
  83
  84 /*
  85  * Most of our global data which we need to save even as we leave the driver
  86  * due to an interrupt or a timer event is stored in a variable of type
  87  * idefloppy_floppy_t, defined below.
  88  */
  89 typedef struct ide_floppy_obj {
  90         ide_drive_t     *drive;
  91         ide_driver_t    *driver;
  92         struct gendisk  *disk;
  93         struct kref     kref;
  94         unsigned int    openers;        /* protected by BKL for now */
  95
  96         /* Current packet command */
  97         struct ide_atapi_pc *pc;
  98         /* Last failed packet command */
  99         struct ide_atapi_pc *failed_pc;
 100         /* used for blk_{fs,pc}_request() requests */
 101         struct ide_atapi_pc queued_pc;
 102
 103         struct ide_atapi_pc request_sense_pc;
 104         struct request request_sense_rq;
 105
 106         /* Last error information */
 107         u8 sense_key, asc, ascq;
 108         /* delay this long before sending packet command */
 109         u8 ticks;
 110         int progress_indication;
 111
 112         /* Device information */
 113         /* Current format */
 114         int blocks, block_size, bs_factor;
 115         /* Last format capacity descriptor */
 116         u8 cap_desc[8];
 117         /* Copy of the flexible disk page */
 118         u8 flexible_disk_page[32];
 119         /* Write protect */
 120         int wp;
 121         /* Supports format progress report */
 122         int srfp;
 123 } idefloppy_floppy_t;
 124
 125 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 126
 127 /* IOCTLs used in low-level formatting. */
 128 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 129 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 130 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 131 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 132
 133 /* Error code returned in rq->errors to the higher part of the driver. */
 134 #define IDEFLOPPY_ERROR_GENERAL         101
 135
 136 /*
 137  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 138  * See SFF-8070i spec.
 139  */
 140 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 141 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 142
 143 static DEFINE_MUTEX(idefloppy_ref_mutex);
 144
 145 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 146
 147 #define ide_floppy_g(disk) \
 148         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 149
 150 static void idefloppy_cleanup_obj(struct kref *);
 151
 152 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 153 {
 154         struct ide_floppy_obj *floppy = NULL;
 155
 156         mutex_lock(&idefloppy_ref_mutex);
 157         floppy = ide_floppy_g(disk);
 158         if (floppy) {
 159                 if (ide_device_get(floppy->drive))
 160                         floppy = NULL;
 161                 else
 162                         kref_get(&floppy->kref);
 163         }
 164         mutex_unlock(&idefloppy_ref_mutex);
 165         return floppy;
 166 }
 167
 168 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 169 {
 170         ide_drive_t *drive = floppy->drive;
 171
 172         mutex_lock(&idefloppy_ref_mutex);
 173         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 174         ide_device_put(drive);
 175         mutex_unlock(&idefloppy_ref_mutex);
 176 }
 177
 178 /*
 179  * Used to finish servicing a request. For read/write requests, we will call
 180  * ide_end_request to pass to the next buffer.
 181  */
 182 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 183 {
 184         idefloppy_floppy_t *floppy = drive->driver_data;
 185         struct request *rq = HWGROUP(drive)->rq;
 186         int error;
 187
 188         debug_log("Reached %s\n", __func__);
 189
 190         switch (uptodate) {
 191         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 192         case 1: error = 0; break;
 193         default: error = uptodate;
 194         }
 195         if (error)
 196                 floppy->failed_pc = NULL;
 197         /* Why does this happen? */
 198         if (!rq)
 199                 return 0;
 200         if (!blk_special_request(rq)) {
 201                 /* our real local end request function */
 202                 ide_end_request(drive, uptodate, nsecs);
 203                 return 0;
 204         }
 205         rq->errors = error;
 206         /* fixme: need to move this local also */
 207         ide_end_drive_cmd(drive, 0, 0);
 208         return 0;
 209 }
 210
 211 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 212                                   unsigned int bcount, int direction)
 213 {
 214         ide_hwif_t *hwif = drive->hwif;
 215         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
 216         xfer_func_t *xf = direction ? tp_ops->output_data : tp_ops->input_data;
 217         struct scatterlist *sg = pc->sg;
 218         char *buf;
 219         int count, done = 0;
 220
 221         while (bcount) {
 222                 count = min(sg->length - pc->b_count, bcount);
 223                 if (PageHighMem(sg_page(sg))) {
 224                         unsigned long flags;
 225
 226                         local_irq_save(flags);
 227                         buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
 228                         xf(drive, NULL, buf + pc->b_count, count);
 229                         kunmap_atomic(buf - sg->offset, KM_IRQ0);
 230                         local_irq_restore(flags);
 231                 } else {
 232                         buf = sg_virt(sg);
 233                         xf(drive, NULL, buf + pc->b_count, count);
 234                 }
 235                 bcount -= count;
 236                 pc->b_count += count;
 237                 done += count;
 238
 239                 if (pc->b_count == sg->length) {
 240                         if (!--pc->sg_cnt)
 241                                 break;
 242                         pc->sg = sg = sg_next(sg);
 243                         pc->b_count = 0;
 244                 }
 245         }
 246
 247         idefloppy_end_request(drive, 1, done >> 9);
 248
 249         if (bcount) {
 250                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 251                                 drive->name, __func__, bcount);
 252                 ide_pad_transfer(drive, direction, bcount);
 253         }
 254 }
 255
 256 static void idefloppy_update_buffers(ide_drive_t *drive,
 257                                 struct ide_atapi_pc *pc)
 258 {
 259         struct request *rq = pc->rq;
 260         struct bio *bio = rq->bio;
 261
 262         while ((bio = rq->bio) != NULL)
 263                 idefloppy_end_request(drive, 1, 0);
 264 }
 265
 266 /*
 267  * Generate a new packet command request in front of the request queue, before
 268  * the current request so that it will be processed immediately, on the next
 269  * pass through the driver.
 270  */
 271 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 272                 struct request *rq)
 273 {
 274         struct ide_floppy_obj *floppy = drive->driver_data;
 275
 276         blk_rq_init(NULL, rq);
 277         rq->buffer = (char *) pc;
 278         rq->cmd_type = REQ_TYPE_SPECIAL;
 279         rq->cmd_flags |= REQ_PREEMPT;
 280         rq->rq_disk = floppy->disk;
 281         memcpy(rq->cmd, pc->c, 12);
 282         ide_do_drive_cmd(drive, rq);
 283 }
 284
 285 static void ide_floppy_callback(ide_drive_t *drive)
 286 {
 287         idefloppy_floppy_t *floppy = drive->driver_data;
 288         struct ide_atapi_pc *pc = floppy->pc;
 289         int uptodate = pc->error ? 0 : 1;
 290
 291         debug_log("Reached %s\n", __func__);
 292
 293         if (floppy->failed_pc == pc)
 294                 floppy->failed_pc = NULL;
 295
 296         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 297             (pc->rq && blk_pc_request(pc->rq)))
 298                 uptodate = 1; /* FIXME */
 299         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 300                 u8 *buf = floppy->pc->buf;
 301
 302                 if (!pc->error) {
 303                         floppy->sense_key = buf[2] & 0x0F;
 304                         floppy->asc = buf[12];
 305                         floppy->ascq = buf[13];
 306                         floppy->progress_indication = buf[15] & 0x80 ?
 307                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 308
 309                         if (floppy->failed_pc)
 310                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 311
 312                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 313                                   floppy->sense_key, floppy->asc, floppy->ascq);
 314                 } else
 315                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 316                                         "Aborting request!\n");
 317         }
 318
 319         idefloppy_end_request(drive, uptodate, 0);
 320 }
 321
 322 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 323 {
 324         memset(pc, 0, sizeof(*pc));
 325         pc->buf = pc->pc_buf;
 326         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 327 }
 328
 329 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 330 {
 331         idefloppy_init_pc(pc);
 332         pc->c[0] = GPCMD_REQUEST_SENSE;
 333         pc->c[4] = 255;
 334         pc->req_xfer = 18;
 335 }
 336
 337 /*
 338  * Called when an error was detected during the last packet command. We queue a
 339  * request sense packet command in the head of the request list.
 340  */
 341 static void idefloppy_retry_pc(ide_drive_t *drive)
 342 {
 343         struct ide_floppy_obj *floppy = drive->driver_data;
 344         struct request *rq = &floppy->request_sense_rq;
 345         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
 346
 347         (void)ide_read_error(drive);
 348         idefloppy_create_request_sense_cmd(pc);
 349         idefloppy_queue_pc_head(drive, pc, rq);
 350 }
 351
 352 /* The usual interrupt handler called during a packet command. */
 353 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 354 {
 355         idefloppy_floppy_t *floppy = drive->driver_data;
 356
 357         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 358                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 359                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 360 }
 361
 362 /*
 363  * What we have here is a classic case of a top half / bottom half interrupt
 364  * service routine. In interrupt mode, the device sends an interrupt to signal
 365  * that it is ready to receive a packet. However, we need to delay about 2-3
 366  * ticks before issuing the packet or we gets in trouble.
 367  */
 368 static int idefloppy_transfer_pc(ide_drive_t *drive)
 369 {
 370         idefloppy_floppy_t *floppy = drive->driver_data;
 371
 372         /* Send the actual packet */
 373         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 374
 375         /* Timeout for the packet command */
 376         return IDEFLOPPY_WAIT_CMD;
 377 }
 378
 379
 380 /*
 381  * Called as an interrupt (or directly). When the device says it's ready for a
 382  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 383  * transfer_pc.
 384  */
 385 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 386 {
 387         idefloppy_floppy_t *floppy = drive->driver_data;
 388         struct ide_atapi_pc *pc = floppy->pc;
 389         ide_expiry_t *expiry;
 390         unsigned int timeout;
 391
 392         /*
 393          * The following delay solves a problem with ATAPI Zip 100 drives
 394          * where the Busy flag was apparently being deasserted before the
 395          * unit was ready to receive data. This was happening on a
 396          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 397          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 398          * used until after the packet is moved in about 50 msec.
 399          */
 400         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 401                 timeout = floppy->ticks;
 402                 expiry = &idefloppy_transfer_pc;
 403         } else {
 404                 timeout = IDEFLOPPY_WAIT_CMD;
 405                 expiry = NULL;
 406         }
 407
 408         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 409 }
 410
 411 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 412                                     struct ide_atapi_pc *pc)
 413 {
 414         /* supress error messages resulting from Medium not present */
 415         if (floppy->sense_key == 0x02 &&
 416             floppy->asc       == 0x3a &&
 417             floppy->ascq      == 0x00)
 418                 return;
 419
 420         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 421                         "asc = %2x, ascq = %2x\n",
 422                         floppy->drive->name, pc->c[0], floppy->sense_key,
 423                         floppy->asc, floppy->ascq);
 424
 425 }
 426
 427 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 428                 struct ide_atapi_pc *pc)
 429 {
 430         idefloppy_floppy_t *floppy = drive->driver_data;
 431
 432         if (floppy->failed_pc == NULL &&
 433             pc->c[0] != GPCMD_REQUEST_SENSE)
 434                 floppy->failed_pc = pc;
 435         /* Set the current packet command */
 436         floppy->pc = pc;
 437
 438         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 439                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 440                         ide_floppy_report_error(floppy, pc);
 441                 /* Giving up */
 442                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 443
 444                 floppy->failed_pc = NULL;
 445                 drive->pc_callback(drive);
 446                 return ide_stopped;
 447         }
 448
 449         debug_log("Retry number - %d\n", pc->retries);
 450
 451         pc->retries++;
 452
 453         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 454                             IDEFLOPPY_WAIT_CMD, NULL);
 455 }
 456
 457 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 458 {
 459         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 460
 461         idefloppy_init_pc(pc);
 462         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 463         pc->c[4] = prevent;
 464 }
 465
 466 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 467 {
 468         idefloppy_init_pc(pc);
 469         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 470         pc->c[7] = 255;
 471         pc->c[8] = 255;
 472         pc->req_xfer = 255;
 473 }
 474
 475 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 476                 int l, int flags)
 477 {
 478         idefloppy_init_pc(pc);
 479         pc->c[0] = GPCMD_FORMAT_UNIT;
 480         pc->c[1] = 0x17;
 481
 482         memset(pc->buf, 0, 12);
 483         pc->buf[1] = 0xA2;
 484         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 485
 486         if (flags & 1)                          /* Verify bit on... */
 487                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 488         pc->buf[3] = 8;
 489
 490         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 491         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 492         pc->buf_size = 12;
 493         pc->flags |= PC_FLAG_WRITING;
 494 }
 495
 496 /* A mode sense command is used to "sense" floppy parameters. */
 497 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 498                                             u8 page_code)
 499 {
 500         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 501
 502         idefloppy_init_pc(pc);
 503         pc->c[0] = GPCMD_MODE_SENSE_10;
 504         pc->c[1] = 0;
 505         pc->c[2] = page_code;
 506
 507         switch (page_code) {
 508         case IDEFLOPPY_CAPABILITIES_PAGE:
 509                 length += 12;
 510                 break;
 511         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 512                 length += 32;
 513                 break;
 514         default:
 515                 printk(KERN_ERR "ide-floppy: unsupported page code "
 516                                 "in create_mode_sense_cmd\n");
 517         }
 518         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 519         pc->req_xfer = length;
 520 }
 521
 522 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 523 {
 524         idefloppy_init_pc(pc);
 525         pc->c[0] = GPCMD_START_STOP_UNIT;
 526         pc->c[4] = start;
 527 }
 528
 529 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 530                                     struct ide_atapi_pc *pc, struct request *rq,
 531                                     unsigned long sector)
 532 {
 533         int block = sector / floppy->bs_factor;
 534         int blocks = rq->nr_sectors / floppy->bs_factor;
 535         int cmd = rq_data_dir(rq);
 536
 537         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 538                 block, blocks);
 539
 540         idefloppy_init_pc(pc);
 541         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 542         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 543         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 544
 545         memcpy(rq->cmd, pc->c, 12);
 546
 547         pc->rq = rq;
 548         pc->b_count = 0;
 549         if (rq->cmd_flags & REQ_RW)
 550                 pc->flags |= PC_FLAG_WRITING;
 551         pc->buf = NULL;
 552         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 553         pc->flags |= PC_FLAG_DMA_OK;
 554 }
 555
 556 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 557                 struct ide_atapi_pc *pc, struct request *rq)
 558 {
 559         idefloppy_init_pc(pc);
 560         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 561         pc->rq = rq;
 562         pc->b_count = 0;
 563         if (rq->data_len && rq_data_dir(rq) == WRITE)
 564                 pc->flags |= PC_FLAG_WRITING;
 565         pc->buf = rq->data;
 566         if (rq->bio)
 567                 pc->flags |= PC_FLAG_DMA_OK;
 568         /*
 569          * possibly problematic, doesn't look like ide-floppy correctly
 570          * handled scattered requests if dma fails...
 571          */
 572         pc->req_xfer = pc->buf_size = rq->data_len;
 573 }
 574
 575 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 576                 struct request *rq, sector_t block_s)
 577 {
 578         idefloppy_floppy_t *floppy = drive->driver_data;
 579         ide_hwif_t *hwif = drive->hwif;
 580         struct ide_atapi_pc *pc;
 581         unsigned long block = (unsigned long)block_s;
 582
 583         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 584                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 585                   rq->cmd[0], rq->cmd_type, rq->errors);
 586
 587         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 588                   __func__, (long)rq->sector, rq->nr_sectors,
 589                   rq->current_nr_sectors);
 590
 591         if (rq->errors >= ERROR_MAX) {
 592                 if (floppy->failed_pc)
 593                         ide_floppy_report_error(floppy, floppy->failed_pc);
 594                 else
 595                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 596                                 drive->name);
 597                 idefloppy_end_request(drive, 0, 0);
 598                 return ide_stopped;
 599         }
 600         if (blk_fs_request(rq)) {
 601                 if (((long)rq->sector % floppy->bs_factor) ||
 602                     (rq->nr_sectors % floppy->bs_factor)) {
 603                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 604                                         drive->name);
 605                         idefloppy_end_request(drive, 0, 0);
 606                         return ide_stopped;
 607                 }
 608                 pc = &floppy->queued_pc;
 609                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 610         } else if (blk_special_request(rq)) {
 611                 pc = (struct ide_atapi_pc *) rq->buffer;
 612         } else if (blk_pc_request(rq)) {
 613                 pc = &floppy->queued_pc;
 614                 idefloppy_blockpc_cmd(floppy, pc, rq);
 615         } else {
 616                 blk_dump_rq_flags(rq,
 617                         "ide-floppy: unsupported command in queue");
 618                 idefloppy_end_request(drive, 0, 0);
 619                 return ide_stopped;
 620         }
 621
 622         ide_init_sg_cmd(drive, rq);
 623         ide_map_sg(drive, rq);
 624
 625         pc->sg = hwif->sg_table;
 626         pc->sg_cnt = hwif->sg_nents;
 627
 628         pc->rq = rq;
 629
 630         return idefloppy_issue_pc(drive, pc);
 631 }
 632
 633 /*
 634  * Add a special packet command request to the tail of the request queue,
 635  * and wait for it to be serviced.
 636  */
 637 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 638 {
 639         struct ide_floppy_obj *floppy = drive->driver_data;
 640         struct request *rq;
 641         int error;
 642
 643         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 644         rq->buffer = (char *) pc;
 645         rq->cmd_type = REQ_TYPE_SPECIAL;
 646         memcpy(rq->cmd, pc->c, 12);
 647         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 648         blk_put_request(rq);
 649
 650         return error;
 651 }
 652
 653 /*
 654  * Look at the flexible disk page parameters. We ignore the CHS capacity
 655  * parameters and use the LBA parameters instead.
 656  */
 657 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 658 {
 659         idefloppy_floppy_t *floppy = drive->driver_data;
 660         struct ide_atapi_pc pc;
 661         u8 *page;
 662         int capacity, lba_capacity;
 663         u16 transfer_rate, sector_size, cyls, rpm;
 664         u8 heads, sectors;
 665
 666         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 667
 668         if (idefloppy_queue_pc_tail(drive, &pc)) {
 669                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 670                                 " parameters\n");
 671                 return 1;
 672         }
 673         floppy->wp = !!(pc.buf[3] & 0x80);
 674         set_disk_ro(floppy->disk, floppy->wp);
 675         page = &pc.buf[8];
 676
 677         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 678         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 679         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 680         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 681         heads         = pc.buf[8 + 4];
 682         sectors       = pc.buf[8 + 5];
 683
 684         capacity = cyls * heads * sectors * sector_size;
 685
 686         if (memcmp(page, &floppy->flexible_disk_page, 32))
 687                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 688                                 "%d sector size, %d rpm\n",
 689                                 drive->name, capacity / 1024, cyls, heads,
 690                                 sectors, transfer_rate / 8, sector_size, rpm);
 691
 692         memcpy(&floppy->flexible_disk_page, page, 32);
 693         drive->bios_cyl = cyls;
 694         drive->bios_head = heads;
 695         drive->bios_sect = sectors;
 696         lba_capacity = floppy->blocks * floppy->block_size;
 697
 698         if (capacity < lba_capacity) {
 699                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 700                         "bytes, but the drive only handles %d\n",
 701                         drive->name, lba_capacity, capacity);
 702                 floppy->blocks = floppy->block_size ?
 703                         capacity / floppy->block_size : 0;
 704         }
 705         return 0;
 706 }
 707
 708 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 709 {
 710         idefloppy_floppy_t *floppy = drive->driver_data;
 711         struct ide_atapi_pc pc;
 712
 713         floppy->srfp = 0;
 714
 715         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE);
 716         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 717
 718         if (idefloppy_queue_pc_tail(drive, &pc))
 719                 return 1;
 720
 721         floppy->srfp = pc.buf[8 + 2] & 0x40;
 722         return 0;
 723 }
 724
 725 /*
 726  * Determine if a media is present in the floppy drive, and if so, its LBA
 727  * capacity.
 728  */
 729 static int ide_floppy_get_capacity(ide_drive_t *drive)
 730 {
 731         idefloppy_floppy_t *floppy = drive->driver_data;
 732         struct ide_atapi_pc pc;
 733         u8 *cap_desc;
 734         u8 header_len, desc_cnt;
 735         int i, rc = 1, blocks, length;
 736
 737         drive->bios_cyl = 0;
 738         drive->bios_head = drive->bios_sect = 0;
 739         floppy->blocks = 0;
 740         floppy->bs_factor = 1;
 741         set_capacity(floppy->disk, 0);
 742
 743         idefloppy_create_read_capacity_cmd(&pc);
 744         if (idefloppy_queue_pc_tail(drive, &pc)) {
 745                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 746                 return 1;
 747         }
 748         header_len = pc.buf[3];
 749         cap_desc = &pc.buf[4];
 750         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 751
 752         for (i = 0; i < desc_cnt; i++) {
 753                 unsigned int desc_start = 4 + i*8;
 754
 755                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 756                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 757
 758                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 759                                 i, blocks * length / 1024, blocks, length);
 760
 761                 if (i)
 762                         continue;
 763                 /*
 764                  * the code below is valid only for the 1st descriptor, ie i=0
 765                  */
 766
 767                 switch (pc.buf[desc_start + 4] & 0x03) {
 768                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 769                 case CAPACITY_UNFORMATTED:
 770                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 771                                 /*
 772                                  * If it is not a clik drive, break out
 773                                  * (maintains previous driver behaviour)
 774                                  */
 775                                 break;
 776                 case CAPACITY_CURRENT:
 777                         /* Normal Zip/LS-120 disks */
 778                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 779                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 780                                         "sector size\n", drive->name,
 781                                         blocks * length / 1024, blocks, length);
 782                         memcpy(&floppy->cap_desc, cap_desc, 8);
 783
 784                         if (!length || length % 512) {
 785                                 printk(KERN_NOTICE "%s: %d bytes block size "
 786                                         "not supported\n", drive->name, length);
 787                         } else {
 788                                 floppy->blocks = blocks;
 789                                 floppy->block_size = length;
 790                                 floppy->bs_factor = length / 512;
 791                                 if (floppy->bs_factor != 1)
 792                                         printk(KERN_NOTICE "%s: warning: non "
 793                                                 "512 bytes block size not "
 794                                                 "fully supported\n",
 795                                                 drive->name);
 796                                 rc = 0;
 797                         }
 798                         break;
 799                 case CAPACITY_NO_CARTRIDGE:
 800                         /*
 801                          * This is a KERN_ERR so it appears on screen
 802                          * for the user to see
 803                          */
 804                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 805                         break;
 806                 case CAPACITY_INVALID:
 807                         printk(KERN_ERR "%s: Invalid capacity for disk "
 808                                 "in drive\n", drive->name);
 809                         break;
 810                 }
 811                 debug_log("Descriptor 0 Code: %d\n",
 812                           pc.buf[desc_start + 4] & 0x03);
 813         }
 814
 815         /* Clik! disk does not support get_flexible_disk_page */
 816         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 817                 (void) ide_floppy_get_flexible_disk_page(drive);
 818
 819         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 820         return rc;
 821 }
 822
 823 /*
 824  * Obtain the list of formattable capacities.
 825  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 826  * descriptors to userland, instead of our own structures.
 827  *
 828  * Userland gives us the following structure:
 829  *
 830  * struct idefloppy_format_capacities {
 831  *      int nformats;
 832  *      struct {
 833  *              int nblocks;
 834  *              int blocksize;
 835  *      } formats[];
 836  * };
 837  *
 838  * userland initializes nformats to the number of allocated formats[] records.
 839  * On exit we set nformats to the number of records we've actually initialized.
 840  */
 841
 842 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 843 {
 844         struct ide_atapi_pc pc;
 845         u8 header_len, desc_cnt;
 846         int i, blocks, length, u_array_size, u_index;
 847         int __user *argp;
 848
 849         if (get_user(u_array_size, arg))
 850                 return -EFAULT;
 851
 852         if (u_array_size <= 0)
 853                 return -EINVAL;
 854
 855         idefloppy_create_read_capacity_cmd(&pc);
 856         if (idefloppy_queue_pc_tail(drive, &pc)) {
 857                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 858                 return -EIO;
 859         }
 860
 861         header_len = pc.buf[3];
 862         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 863
 864         u_index = 0;
 865         argp = arg + 1;
 866
 867         /*
 868          * We always skip the first capacity descriptor.  That's the current
 869          * capacity.  We are interested in the remaining descriptors, the
 870          * formattable capacities.
 871          */
 872         for (i = 1; i < desc_cnt; i++) {
 873                 unsigned int desc_start = 4 + i*8;
 874
 875                 if (u_index >= u_array_size)
 876                         break;  /* User-supplied buffer too small */
 877
 878                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 879                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 880
 881                 if (put_user(blocks, argp))
 882                         return -EFAULT;
 883
 884                 ++argp;
 885
 886                 if (put_user(length, argp))
 887                         return -EFAULT;
 888
 889                 ++argp;
 890
 891                 ++u_index;
 892         }
 893
 894         if (put_user(u_index, arg))
 895                 return -EFAULT;
 896
 897         return 0;
 898 }
 899
 900 /*
 901  * Get ATAPI_FORMAT_UNIT progress indication.
 902  *
 903  * Userland gives a pointer to an int.  The int is set to a progress
 904  * indicator 0-65536, with 65536=100%.
 905  *
 906  * If the drive does not support format progress indication, we just check
 907  * the dsc bit, and return either 0 or 65536.
 908  */
 909
 910 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 911 {
 912         idefloppy_floppy_t *floppy = drive->driver_data;
 913         struct ide_atapi_pc pc;
 914         int progress_indication = 0x10000;
 915
 916         if (floppy->srfp) {
 917                 idefloppy_create_request_sense_cmd(&pc);
 918                 if (idefloppy_queue_pc_tail(drive, &pc))
 919                         return -EIO;
 920
 921                 if (floppy->sense_key == 2 &&
 922                     floppy->asc == 4 &&
 923                     floppy->ascq == 4)
 924                         progress_indication = floppy->progress_indication;
 925
 926                 /* Else assume format_unit has finished, and we're at 0x10000 */
 927         } else {
 928                 ide_hwif_t *hwif = drive->hwif;
 929                 unsigned long flags;
 930                 u8 stat;
 931
 932                 local_irq_save(flags);
 933                 stat = hwif->tp_ops->read_status(hwif);
 934                 local_irq_restore(flags);
 935
 936                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 937         }
 938
 939         if (put_user(progress_indication, arg))
 940                 return -EFAULT;
 941
 942         return 0;
 943 }
 944
 945 static sector_t idefloppy_capacity(ide_drive_t *drive)
 946 {
 947         idefloppy_floppy_t *floppy = drive->driver_data;
 948         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 949
 950         return capacity;
 951 }
 952
 953 #ifdef CONFIG_IDE_PROC_FS
 954 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 955 ide_devset_rw(bios_head, 0,  255, bios_head);
 956 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 957
 958 static int get_ticks(ide_drive_t *drive)
 959 {
 960         idefloppy_floppy_t *floppy = drive->driver_data;
 961         return floppy->ticks;
 962 }
 963
 964 static int set_ticks(ide_drive_t *drive, int arg)
 965 {
 966         idefloppy_floppy_t *floppy = drive->driver_data;
 967         floppy->ticks = arg;
 968         return 0;
 969 }
 970
 971 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
 972
 973 static const struct ide_devset *idefloppy_settings[] = {
 974         &ide_devset_bios_cyl,
 975         &ide_devset_bios_head,
 976         &ide_devset_bios_sect,
 977         &ide_devset_ticks,
 978         NULL
 979 };
 980 #endif
 981
 982 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 983 {
 984         u16 *id = drive->id;
 985         u8 gcw[2];
 986
 987         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 988
 989         drive->pc_callback = ide_floppy_callback;
 990
 991         if (((gcw[0] & 0x60) >> 5) == 1)
 992                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
 993         /*
 994          * We used to check revisions here. At this point however I'm giving up.
 995          * Just assume they are all broken, its easier.
 996          *
 997          * The actual reason for the workarounds was likely a driver bug after
 998          * all rather than a firmware bug, and the workaround below used to hide
 999          * it. It should be fixed as of version 1.9, but to be on the safe side
1000          * we'll leave the limitation below for the 2.2.x tree.
1001          */
1002         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
1003                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1004                 /* This value will be visible in the /proc/ide/hdx/settings */
1005                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1006                 blk_queue_max_sectors(drive->queue, 64);
1007         }
1008
1009         /*
1010          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1011          * nasty clicking noises without it, so please don't remove this.
1012          */
1013         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
1014                 blk_queue_max_sectors(drive->queue, 64);
1015                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1016         }
1017
1018         (void) ide_floppy_get_capacity(drive);
1019
1020         ide_proc_register_driver(drive, floppy->driver);
1021 }
1022
1023 static void ide_floppy_remove(ide_drive_t *drive)
1024 {
1025         idefloppy_floppy_t *floppy = drive->driver_data;
1026         struct gendisk *g = floppy->disk;
1027
1028         ide_proc_unregister_driver(drive, floppy->driver);
1029
1030         del_gendisk(g);
1031
1032         ide_floppy_put(floppy);
1033 }
1034
1035 static void idefloppy_cleanup_obj(struct kref *kref)
1036 {
1037         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1038         ide_drive_t *drive = floppy->drive;
1039         struct gendisk *g = floppy->disk;
1040
1041         drive->driver_data = NULL;
1042         g->private_data = NULL;
1043         put_disk(g);
1044         kfree(floppy);
1045 }
1046
1047 #ifdef CONFIG_IDE_PROC_FS
1048 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1049                 int count, int *eof, void *data)
1050 {
1051         ide_drive_t*drive = (ide_drive_t *)data;
1052         int len;
1053
1054         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1055         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1056 }
1057
1058 static ide_proc_entry_t idefloppy_proc[] = {
1059         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1060         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1061         { NULL, 0, NULL, NULL }
1062 };
1063 #endif  /* CONFIG_IDE_PROC_FS */
1064
1065 static int ide_floppy_probe(ide_drive_t *);
1066
1067 static ide_driver_t idefloppy_driver = {
1068         .gen_driver = {
1069                 .owner          = THIS_MODULE,
1070                 .name           = "ide-floppy",
1071                 .bus            = &ide_bus_type,
1072         },
1073         .probe                  = ide_floppy_probe,
1074         .remove                 = ide_floppy_remove,
1075         .version                = IDEFLOPPY_VERSION,
1076         .media                  = ide_floppy,
1077         .do_request             = idefloppy_do_request,
1078         .end_request            = idefloppy_end_request,
1079         .error                  = __ide_error,
1080 #ifdef CONFIG_IDE_PROC_FS
1081         .proc                   = idefloppy_proc,
1082         .settings               = idefloppy_settings,
1083 #endif
1084 };
1085
1086 static int idefloppy_open(struct inode *inode, struct file *filp)
1087 {
1088         struct gendisk *disk = inode->i_bdev->bd_disk;
1089         struct ide_floppy_obj *floppy;
1090         ide_drive_t *drive;
1091         struct ide_atapi_pc pc;
1092         int ret = 0;
1093
1094         debug_log("Reached %s\n", __func__);
1095
1096         floppy = ide_floppy_get(disk);
1097         if (!floppy)
1098                 return -ENXIO;
1099
1100         drive = floppy->drive;
1101
1102         floppy->openers++;
1103
1104         if (floppy->openers == 1) {
1105                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1106                 /* Just in case */
1107
1108                 idefloppy_init_pc(&pc);
1109                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1110
1111                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1112                         idefloppy_create_start_stop_cmd(&pc, 1);
1113                         (void) idefloppy_queue_pc_tail(drive, &pc);
1114                 }
1115
1116                 if (ide_floppy_get_capacity(drive)
1117                    && (filp->f_flags & O_NDELAY) == 0
1118                     /*
1119                      * Allow O_NDELAY to open a drive without a disk, or with an
1120                      * unreadable disk, so that we can get the format capacity
1121                      * of the drive or begin the format - Sam
1122                      */
1123                     ) {
1124                         ret = -EIO;
1125                         goto out_put_floppy;
1126                 }
1127
1128                 if (floppy->wp && (filp->f_mode & 2)) {
1129                         ret = -EROFS;
1130                         goto out_put_floppy;
1131                 }
1132                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1133                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1134                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1135                         idefloppy_create_prevent_cmd(&pc, 1);
1136                         (void) idefloppy_queue_pc_tail(drive, &pc);
1137                 }
1138                 check_disk_change(inode->i_bdev);
1139         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1140                 ret = -EBUSY;
1141                 goto out_put_floppy;
1142         }
1143         return 0;
1144
1145 out_put_floppy:
1146         floppy->openers--;
1147         ide_floppy_put(floppy);
1148         return ret;
1149 }
1150
1151 static int idefloppy_release(struct inode *inode, struct file *filp)
1152 {
1153         struct gendisk *disk = inode->i_bdev->bd_disk;
1154         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1155         ide_drive_t *drive = floppy->drive;
1156         struct ide_atapi_pc pc;
1157
1158         debug_log("Reached %s\n", __func__);
1159
1160         if (floppy->openers == 1) {
1161                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1162                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1163                         idefloppy_create_prevent_cmd(&pc, 0);
1164                         (void) idefloppy_queue_pc_tail(drive, &pc);
1165                 }
1166
1167                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1168         }
1169
1170         floppy->openers--;
1171
1172         ide_floppy_put(floppy);
1173
1174         return 0;
1175 }
1176
1177 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1178 {
1179         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1180         ide_drive_t *drive = floppy->drive;
1181
1182         geo->heads = drive->bios_head;
1183         geo->sectors = drive->bios_sect;
1184         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1185         return 0;
1186 }
1187
1188 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1189                                unsigned long arg, unsigned int cmd)
1190 {
1191         idefloppy_floppy_t *floppy = drive->driver_data;
1192
1193         if (floppy->openers > 1)
1194                 return -EBUSY;
1195
1196         /* The IOMEGA Clik! Drive doesn't support this command -
1197          * no room for an eject mechanism */
1198         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1199                 int prevent = arg ? 1 : 0;
1200
1201                 if (cmd == CDROMEJECT)
1202                         prevent = 0;
1203
1204                 idefloppy_create_prevent_cmd(pc, prevent);
1205                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1206         }
1207
1208         if (cmd == CDROMEJECT) {
1209                 idefloppy_create_start_stop_cmd(pc, 2);
1210                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1211         }
1212
1213         return 0;
1214 }
1215
1216 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1217 {
1218         idefloppy_floppy_t *floppy = drive->driver_data;
1219         struct ide_atapi_pc pc;
1220         int blocks, length, flags, err = 0;
1221
1222         if (floppy->openers > 1) {
1223                 /* Don't format if someone is using the disk */
1224                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1225                 return -EBUSY;
1226         }
1227
1228         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1229
1230         /*
1231          * Send ATAPI_FORMAT_UNIT to the drive.
1232          *
1233          * Userland gives us the following structure:
1234          *
1235          * struct idefloppy_format_command {
1236          *        int nblocks;
1237          *        int blocksize;
1238          *        int flags;
1239          *        } ;
1240          *
1241          * flags is a bitmask, currently, the only defined flag is:
1242          *
1243          *        0x01 - verify media after format.
1244          */
1245         if (get_user(blocks, arg) ||
1246                         get_user(length, arg+1) ||
1247                         get_user(flags, arg+2)) {
1248                 err = -EFAULT;
1249                 goto out;
1250         }
1251
1252         (void) idefloppy_get_sfrp_bit(drive);
1253         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1254
1255         if (idefloppy_queue_pc_tail(drive, &pc))
1256                 err = -EIO;
1257
1258 out:
1259         if (err)
1260                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1261         return err;
1262 }
1263
1264 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1265                                    unsigned int cmd, void __user *argp)
1266 {
1267         switch (cmd) {
1268         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1269                 return 0;
1270         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1271                 return ide_floppy_get_format_capacities(drive, argp);
1272         case IDEFLOPPY_IOCTL_FORMAT_START:
1273                 if (!(file->f_mode & 2))
1274                         return -EPERM;
1275                 return ide_floppy_format_unit(drive, (int __user *)argp);
1276         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1277                 return ide_floppy_get_format_progress(drive, argp);
1278         default:
1279                 return -ENOTTY;
1280         }
1281 }
1282
1283 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1284                         unsigned int cmd, unsigned long arg)
1285 {
1286         struct block_device *bdev = inode->i_bdev;
1287         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1288         ide_drive_t *drive = floppy->drive;
1289         struct ide_atapi_pc pc;
1290         void __user *argp = (void __user *)arg;
1291         int err;
1292
1293         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1294                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1295
1296         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1297         if (err != -ENOTTY)
1298                 return err;
1299
1300         /*
1301          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1302          * and CDROM_SEND_PACKET (legacy) ioctls
1303          */
1304         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1305                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1306                                         bdev->bd_disk, cmd, argp);
1307
1308         if (err == -ENOTTY)
1309                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1310
1311         return err;
1312 }
1313
1314 static int idefloppy_media_changed(struct gendisk *disk)
1315 {
1316         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1317         ide_drive_t *drive = floppy->drive;
1318         int ret;
1319
1320         /* do not scan partitions twice if this is a removable device */
1321         if (drive->attach) {
1322                 drive->attach = 0;
1323                 return 0;
1324         }
1325         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1326         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1327         return ret;
1328 }
1329
1330 static int idefloppy_revalidate_disk(struct gendisk *disk)
1331 {
1332         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1333         set_capacity(disk, idefloppy_capacity(floppy->drive));
1334         return 0;
1335 }
1336
1337 static struct block_device_operations idefloppy_ops = {
1338         .owner                  = THIS_MODULE,
1339         .open                   = idefloppy_open,
1340         .release                = idefloppy_release,
1341         .ioctl                  = idefloppy_ioctl,
1342         .getgeo                 = idefloppy_getgeo,
1343         .media_changed          = idefloppy_media_changed,
1344         .revalidate_disk        = idefloppy_revalidate_disk
1345 };
1346
1347 static int ide_floppy_probe(ide_drive_t *drive)
1348 {
1349         idefloppy_floppy_t *floppy;
1350         struct gendisk *g;
1351
1352         if (!strstr("ide-floppy", drive->driver_req))
1353                 goto failed;
1354
1355         if (drive->media != ide_floppy)
1356                 goto failed;
1357
1358         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1359                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1360                                 " of ide-floppy\n", drive->name);
1361                 goto failed;
1362         }
1363         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1364         if (!floppy) {
1365                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1366                                 " structure\n", drive->name);
1367                 goto failed;
1368         }
1369
1370         g = alloc_disk(1 << PARTN_BITS);
1371         if (!g)
1372                 goto out_free_floppy;
1373
1374         ide_init_disk(g, drive);
1375
1376         kref_init(&floppy->kref);
1377
1378         floppy->drive = drive;
1379         floppy->driver = &idefloppy_driver;
1380         floppy->disk = g;
1381
1382         g->private_data = &floppy->driver;
1383
1384         drive->driver_data = floppy;
1385
1386         idefloppy_setup(drive, floppy);
1387
1388         g->minors = 1 << PARTN_BITS;
1389         g->driverfs_dev = &drive->gendev;
1390         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1391         g->fops = &idefloppy_ops;
1392         drive->attach = 1;
1393         add_disk(g);
1394         return 0;
1395
1396 out_free_floppy:
1397         kfree(floppy);
1398 failed:
1399         return -ENODEV;
1400 }
1401
1402 static void __exit idefloppy_exit(void)
1403 {
1404         driver_unregister(&idefloppy_driver.gen_driver);
1405 }
1406
1407 static int __init idefloppy_init(void)
1408 {
1409         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1410         return driver_register(&idefloppy_driver.gen_driver);
1411 }
1412
1413 MODULE_ALIAS("ide:*m-floppy*");
1414 module_init(idefloppy_init);
1415 module_exit(idefloppy_exit);
1416 MODULE_LICENSE("GPL");
1417 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1418