drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define IDEFLOPPY_VERSION "1.00"
  19
  20 #include <linux/module.h>
  21 #include <linux/types.h>
  22 #include <linux/string.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/timer.h>
  26 #include <linux/mm.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/major.h>
  29 #include <linux/errno.h>
  30 #include <linux/genhd.h>
  31 #include <linux/slab.h>
  32 #include <linux/cdrom.h>
  33 #include <linux/ide.h>
  34 #include <linux/bitops.h>
  35 #include <linux/mutex.h>
  36
  37 #include <scsi/scsi_ioctl.h>
  38
  39 #include <asm/byteorder.h>
  40 #include <linux/irq.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/io.h>
  43 #include <asm/unaligned.h>
  44
  45 /* define to see debug info */
  46 #define IDEFLOPPY_DEBUG_LOG             0
  47
  48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  49 #define IDEFLOPPY_DEBUG(fmt, args...)
  50
  51 #if IDEFLOPPY_DEBUG_LOG
  52 #define debug_log(fmt, args...) \
  53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  54 #else
  55 #define debug_log(fmt, args...) do {} while (0)
  56 #endif
  57
  58
  59 /* Some drives require a longer irq timeout. */
  60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  61
  62 /*
  63  * After each failed packet command we issue a request sense command and retry
  64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  65  */
  66 #define IDEFLOPPY_MAX_PC_RETRIES        3
  67
  68 /*
  69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  70  * bytes.
  71  */
  72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  73
  74 /*
  75  * In various places in the driver, we need to allocate storage for packet
  76  * commands and requests, which will remain valid while we leave the driver to
  77  * wait for an interrupt or a timeout event.
  78  */
  79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  80
  81 /* format capacities descriptor codes */
  82 #define CAPACITY_INVALID        0x00
  83 #define CAPACITY_UNFORMATTED    0x01
  84 #define CAPACITY_CURRENT        0x02
  85 #define CAPACITY_NO_CARTRIDGE   0x03
  86
  87 /*
  88  * Most of our global data which we need to save even as we leave the driver
  89  * due to an interrupt or a timer event is stored in a variable of type
  90  * idefloppy_floppy_t, defined below.
  91  */
  92 typedef struct ide_floppy_obj {
  93         ide_drive_t     *drive;
  94         ide_driver_t    *driver;
  95         struct gendisk  *disk;
  96         struct kref     kref;
  97         unsigned int    openers;        /* protected by BKL for now */
  98
  99         /* Current packet command */
 100         struct ide_atapi_pc *pc;
 101         /* Last failed packet command */
 102         struct ide_atapi_pc *failed_pc;
 103         /* Packet command stack */
 104         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 105         /* Next free packet command storage space */
 106         int pc_stack_index;
 107         struct request rq_stack[IDEFLOPPY_PC_STACK];
 108         /* We implement a circular array */
 109         int rq_stack_index;
 110
 111         /* Last error information */
 112         u8 sense_key, asc, ascq;
 113         /* delay this long before sending packet command */
 114         u8 ticks;
 115         int progress_indication;
 116
 117         /* Device information */
 118         /* Current format */
 119         int blocks, block_size, bs_factor;
 120         /* Last format capacity descriptor */
 121         u8 cap_desc[8];
 122         /* Copy of the flexible disk page */
 123         u8 flexible_disk_page[32];
 124         /* Write protect */
 125         int wp;
 126         /* Supports format progress report */
 127         int srfp;
 128 } idefloppy_floppy_t;
 129
 130 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 131
 132 /* Defines for the MODE SENSE command */
 133 #define MODE_SENSE_CURRENT              0x00
 134 #define MODE_SENSE_CHANGEABLE           0x01
 135 #define MODE_SENSE_DEFAULT              0x02
 136 #define MODE_SENSE_SAVED                0x03
 137
 138 /* IOCTLs used in low-level formatting. */
 139 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 140 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 141 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 142 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 143
 144 /* Error code returned in rq->errors to the higher part of the driver. */
 145 #define IDEFLOPPY_ERROR_GENERAL         101
 146
 147 /*
 148  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 149  * See SFF-8070i spec.
 150  */
 151 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 152 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 153
 154 static DEFINE_MUTEX(idefloppy_ref_mutex);
 155
 156 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 157
 158 #define ide_floppy_g(disk) \
 159         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 160
 161 static void idefloppy_cleanup_obj(struct kref *);
 162
 163 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 164 {
 165         struct ide_floppy_obj *floppy = NULL;
 166
 167         mutex_lock(&idefloppy_ref_mutex);
 168         floppy = ide_floppy_g(disk);
 169         if (floppy) {
 170                 if (ide_device_get(floppy->drive))
 171                         floppy = NULL;
 172                 else
 173                         kref_get(&floppy->kref);
 174         }
 175         mutex_unlock(&idefloppy_ref_mutex);
 176         return floppy;
 177 }
 178
 179 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 180 {
 181         ide_drive_t *drive = floppy->drive;
 182
 183         mutex_lock(&idefloppy_ref_mutex);
 184         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 185         ide_device_put(drive);
 186         mutex_unlock(&idefloppy_ref_mutex);
 187 }
 188
 189 /*
 190  * Used to finish servicing a request. For read/write requests, we will call
 191  * ide_end_request to pass to the next buffer.
 192  */
 193 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 194 {
 195         idefloppy_floppy_t *floppy = drive->driver_data;
 196         struct request *rq = HWGROUP(drive)->rq;
 197         int error;
 198
 199         debug_log("Reached %s\n", __func__);
 200
 201         switch (uptodate) {
 202         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 203         case 1: error = 0; break;
 204         default: error = uptodate;
 205         }
 206         if (error)
 207                 floppy->failed_pc = NULL;
 208         /* Why does this happen? */
 209         if (!rq)
 210                 return 0;
 211         if (!blk_special_request(rq)) {
 212                 /* our real local end request function */
 213                 ide_end_request(drive, uptodate, nsecs);
 214                 return 0;
 215         }
 216         rq->errors = error;
 217         /* fixme: need to move this local also */
 218         ide_end_drive_cmd(drive, 0, 0);
 219         return 0;
 220 }
 221
 222 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 223                                   unsigned int bcount, int direction)
 224 {
 225         ide_hwif_t *hwif = drive->hwif;
 226         struct request *rq = pc->rq;
 227         struct req_iterator iter;
 228         struct bio_vec *bvec;
 229         unsigned long flags;
 230         int count, done = 0;
 231         char *data;
 232
 233         rq_for_each_segment(bvec, rq, iter) {
 234                 if (!bcount)
 235                         break;
 236
 237                 count = min(bvec->bv_len, bcount);
 238
 239                 data = bvec_kmap_irq(bvec, &flags);
 240                 if (direction)
 241                         hwif->tp_ops->output_data(drive, NULL, data, count);
 242                 else
 243                         hwif->tp_ops->input_data(drive, NULL, data, count);
 244                 bvec_kunmap_irq(data, &flags);
 245
 246                 bcount -= count;
 247                 pc->b_count += count;
 248                 done += count;
 249         }
 250
 251         idefloppy_end_request(drive, 1, done >> 9);
 252
 253         if (bcount) {
 254                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 255                                 drive->name, __func__, bcount);
 256                 ide_pad_transfer(drive, direction, bcount);
 257         }
 258 }
 259
 260 static void idefloppy_update_buffers(ide_drive_t *drive,
 261                                 struct ide_atapi_pc *pc)
 262 {
 263         struct request *rq = pc->rq;
 264         struct bio *bio = rq->bio;
 265
 266         while ((bio = rq->bio) != NULL)
 267                 idefloppy_end_request(drive, 1, 0);
 268 }
 269
 270 /*
 271  * Generate a new packet command request in front of the request queue, before
 272  * the current request so that it will be processed immediately, on the next
 273  * pass through the driver.
 274  */
 275 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 276                 struct request *rq)
 277 {
 278         struct ide_floppy_obj *floppy = drive->driver_data;
 279
 280         blk_rq_init(NULL, rq);
 281         rq->buffer = (char *) pc;
 282         rq->cmd_type = REQ_TYPE_SPECIAL;
 283         rq->cmd_flags |= REQ_PREEMPT;
 284         rq->rq_disk = floppy->disk;
 285         memcpy(rq->cmd, pc->c, 12);
 286         ide_do_drive_cmd(drive, rq);
 287 }
 288
 289 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 290 {
 291         idefloppy_floppy_t *floppy = drive->driver_data;
 292
 293         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 294                 floppy->pc_stack_index = 0;
 295         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 296 }
 297
 298 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 299 {
 300         idefloppy_floppy_t *floppy = drive->driver_data;
 301
 302         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 303                 floppy->rq_stack_index = 0;
 304         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 305 }
 306
 307 static void ide_floppy_callback(ide_drive_t *drive)
 308 {
 309         idefloppy_floppy_t *floppy = drive->driver_data;
 310         struct ide_atapi_pc *pc = floppy->pc;
 311         int uptodate = pc->error ? 0 : 1;
 312
 313         debug_log("Reached %s\n", __func__);
 314
 315         if (floppy->failed_pc == pc)
 316                 floppy->failed_pc = NULL;
 317
 318         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 319             (pc->rq && blk_pc_request(pc->rq)))
 320                 uptodate = 1; /* FIXME */
 321         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 322                 u8 *buf = floppy->pc->buf;
 323
 324                 if (!pc->error) {
 325                         floppy->sense_key = buf[2] & 0x0F;
 326                         floppy->asc = buf[12];
 327                         floppy->ascq = buf[13];
 328                         floppy->progress_indication = buf[15] & 0x80 ?
 329                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 330
 331                         if (floppy->failed_pc)
 332                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 333
 334                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 335                                   floppy->sense_key, floppy->asc, floppy->ascq);
 336                 } else
 337                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 338                                         "Aborting request!\n");
 339         }
 340
 341         idefloppy_end_request(drive, uptodate, 0);
 342 }
 343
 344 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 345 {
 346         memset(pc, 0, sizeof(*pc));
 347         pc->buf = pc->pc_buf;
 348         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 349 }
 350
 351 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 352 {
 353         idefloppy_init_pc(pc);
 354         pc->c[0] = GPCMD_REQUEST_SENSE;
 355         pc->c[4] = 255;
 356         pc->req_xfer = 18;
 357 }
 358
 359 /*
 360  * Called when an error was detected during the last packet command. We queue a
 361  * request sense packet command in the head of the request list.
 362  */
 363 static void idefloppy_retry_pc(ide_drive_t *drive)
 364 {
 365         struct ide_atapi_pc *pc;
 366         struct request *rq;
 367
 368         (void)ide_read_error(drive);
 369         pc = idefloppy_next_pc_storage(drive);
 370         rq = idefloppy_next_rq_storage(drive);
 371         idefloppy_create_request_sense_cmd(pc);
 372         idefloppy_queue_pc_head(drive, pc, rq);
 373 }
 374
 375 /* The usual interrupt handler called during a packet command. */
 376 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 377 {
 378         idefloppy_floppy_t *floppy = drive->driver_data;
 379
 380         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 381                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 382                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 383 }
 384
 385 /*
 386  * What we have here is a classic case of a top half / bottom half interrupt
 387  * service routine. In interrupt mode, the device sends an interrupt to signal
 388  * that it is ready to receive a packet. However, we need to delay about 2-3
 389  * ticks before issuing the packet or we gets in trouble.
 390  */
 391 static int idefloppy_transfer_pc(ide_drive_t *drive)
 392 {
 393         idefloppy_floppy_t *floppy = drive->driver_data;
 394
 395         /* Send the actual packet */
 396         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 397
 398         /* Timeout for the packet command */
 399         return IDEFLOPPY_WAIT_CMD;
 400 }
 401
 402
 403 /*
 404  * Called as an interrupt (or directly). When the device says it's ready for a
 405  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 406  * transfer_pc.
 407  */
 408 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 409 {
 410         idefloppy_floppy_t *floppy = drive->driver_data;
 411         struct ide_atapi_pc *pc = floppy->pc;
 412         ide_expiry_t *expiry;
 413         unsigned int timeout;
 414
 415         /*
 416          * The following delay solves a problem with ATAPI Zip 100 drives
 417          * where the Busy flag was apparently being deasserted before the
 418          * unit was ready to receive data. This was happening on a
 419          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 420          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 421          * used until after the packet is moved in about 50 msec.
 422          */
 423         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 424                 timeout = floppy->ticks;
 425                 expiry = &idefloppy_transfer_pc;
 426         } else {
 427                 timeout = IDEFLOPPY_WAIT_CMD;
 428                 expiry = NULL;
 429         }
 430
 431         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 432 }
 433
 434 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 435                                     struct ide_atapi_pc *pc)
 436 {
 437         /* supress error messages resulting from Medium not present */
 438         if (floppy->sense_key == 0x02 &&
 439             floppy->asc       == 0x3a &&
 440             floppy->ascq      == 0x00)
 441                 return;
 442
 443         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 444                         "asc = %2x, ascq = %2x\n",
 445                         floppy->drive->name, pc->c[0], floppy->sense_key,
 446                         floppy->asc, floppy->ascq);
 447
 448 }
 449
 450 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 451                 struct ide_atapi_pc *pc)
 452 {
 453         idefloppy_floppy_t *floppy = drive->driver_data;
 454
 455         if (floppy->failed_pc == NULL &&
 456             pc->c[0] != GPCMD_REQUEST_SENSE)
 457                 floppy->failed_pc = pc;
 458         /* Set the current packet command */
 459         floppy->pc = pc;
 460
 461         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 462                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 463                         ide_floppy_report_error(floppy, pc);
 464                 /* Giving up */
 465                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 466
 467                 floppy->failed_pc = NULL;
 468                 drive->pc_callback(drive);
 469                 return ide_stopped;
 470         }
 471
 472         debug_log("Retry number - %d\n", pc->retries);
 473
 474         pc->retries++;
 475
 476         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 477                             IDEFLOPPY_WAIT_CMD, NULL);
 478 }
 479
 480 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 481 {
 482         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 483
 484         idefloppy_init_pc(pc);
 485         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 486         pc->c[4] = prevent;
 487 }
 488
 489 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 490 {
 491         idefloppy_init_pc(pc);
 492         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 493         pc->c[7] = 255;
 494         pc->c[8] = 255;
 495         pc->req_xfer = 255;
 496 }
 497
 498 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 499                 int l, int flags)
 500 {
 501         idefloppy_init_pc(pc);
 502         pc->c[0] = GPCMD_FORMAT_UNIT;
 503         pc->c[1] = 0x17;
 504
 505         memset(pc->buf, 0, 12);
 506         pc->buf[1] = 0xA2;
 507         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 508
 509         if (flags & 1)                          /* Verify bit on... */
 510                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 511         pc->buf[3] = 8;
 512
 513         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 514         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 515         pc->buf_size = 12;
 516         pc->flags |= PC_FLAG_WRITING;
 517 }
 518
 519 /* A mode sense command is used to "sense" floppy parameters. */
 520 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 521                 u8 page_code, u8 type)
 522 {
 523         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 524
 525         idefloppy_init_pc(pc);
 526         pc->c[0] = GPCMD_MODE_SENSE_10;
 527         pc->c[1] = 0;
 528         pc->c[2] = page_code + (type << 6);
 529
 530         switch (page_code) {
 531         case IDEFLOPPY_CAPABILITIES_PAGE:
 532                 length += 12;
 533                 break;
 534         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 535                 length += 32;
 536                 break;
 537         default:
 538                 printk(KERN_ERR "ide-floppy: unsupported page code "
 539                                 "in create_mode_sense_cmd\n");
 540         }
 541         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 542         pc->req_xfer = length;
 543 }
 544
 545 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 546 {
 547         idefloppy_init_pc(pc);
 548         pc->c[0] = GPCMD_START_STOP_UNIT;
 549         pc->c[4] = start;
 550 }
 551
 552 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 553                                     struct ide_atapi_pc *pc, struct request *rq,
 554                                     unsigned long sector)
 555 {
 556         int block = sector / floppy->bs_factor;
 557         int blocks = rq->nr_sectors / floppy->bs_factor;
 558         int cmd = rq_data_dir(rq);
 559
 560         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 561                 block, blocks);
 562
 563         idefloppy_init_pc(pc);
 564         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 565         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 566         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 567
 568         memcpy(rq->cmd, pc->c, 12);
 569
 570         pc->rq = rq;
 571         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 572         if (rq->cmd_flags & REQ_RW)
 573                 pc->flags |= PC_FLAG_WRITING;
 574         pc->buf = NULL;
 575         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 576         pc->flags |= PC_FLAG_DMA_OK;
 577 }
 578
 579 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 580                 struct ide_atapi_pc *pc, struct request *rq)
 581 {
 582         idefloppy_init_pc(pc);
 583         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 584         pc->rq = rq;
 585         pc->b_count = rq->data_len;
 586         if (rq->data_len && rq_data_dir(rq) == WRITE)
 587                 pc->flags |= PC_FLAG_WRITING;
 588         pc->buf = rq->data;
 589         if (rq->bio)
 590                 pc->flags |= PC_FLAG_DMA_OK;
 591         /*
 592          * possibly problematic, doesn't look like ide-floppy correctly
 593          * handled scattered requests if dma fails...
 594          */
 595         pc->req_xfer = pc->buf_size = rq->data_len;
 596 }
 597
 598 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 599                 struct request *rq, sector_t block_s)
 600 {
 601         idefloppy_floppy_t *floppy = drive->driver_data;
 602         struct ide_atapi_pc *pc;
 603         unsigned long block = (unsigned long)block_s;
 604
 605         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 606                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 607                         rq->cmd_type, rq->errors);
 608         debug_log("sector: %ld, nr_sectors: %ld, "
 609                         "current_nr_sectors: %d\n", (long)rq->sector,
 610                         rq->nr_sectors, rq->current_nr_sectors);
 611
 612         if (rq->errors >= ERROR_MAX) {
 613                 if (floppy->failed_pc)
 614                         ide_floppy_report_error(floppy, floppy->failed_pc);
 615                 else
 616                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 617                                 drive->name);
 618                 idefloppy_end_request(drive, 0, 0);
 619                 return ide_stopped;
 620         }
 621         if (blk_fs_request(rq)) {
 622                 if (((long)rq->sector % floppy->bs_factor) ||
 623                     (rq->nr_sectors % floppy->bs_factor)) {
 624                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 625                                         drive->name);
 626                         idefloppy_end_request(drive, 0, 0);
 627                         return ide_stopped;
 628                 }
 629                 pc = idefloppy_next_pc_storage(drive);
 630                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 631         } else if (blk_special_request(rq)) {
 632                 pc = (struct ide_atapi_pc *) rq->buffer;
 633         } else if (blk_pc_request(rq)) {
 634                 pc = idefloppy_next_pc_storage(drive);
 635                 idefloppy_blockpc_cmd(floppy, pc, rq);
 636         } else {
 637                 blk_dump_rq_flags(rq,
 638                         "ide-floppy: unsupported command in queue");
 639                 idefloppy_end_request(drive, 0, 0);
 640                 return ide_stopped;
 641         }
 642
 643         pc->rq = rq;
 644
 645         return idefloppy_issue_pc(drive, pc);
 646 }
 647
 648 /*
 649  * Add a special packet command request to the tail of the request queue,
 650  * and wait for it to be serviced.
 651  */
 652 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 653 {
 654         struct ide_floppy_obj *floppy = drive->driver_data;
 655         struct request *rq;
 656         int error;
 657
 658         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 659         rq->buffer = (char *) pc;
 660         rq->cmd_type = REQ_TYPE_SPECIAL;
 661         memcpy(rq->cmd, pc->c, 12);
 662         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 663         blk_put_request(rq);
 664
 665         return error;
 666 }
 667
 668 /*
 669  * Look at the flexible disk page parameters. We ignore the CHS capacity
 670  * parameters and use the LBA parameters instead.
 671  */
 672 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 673 {
 674         idefloppy_floppy_t *floppy = drive->driver_data;
 675         struct ide_atapi_pc pc;
 676         u8 *page;
 677         int capacity, lba_capacity;
 678         u16 transfer_rate, sector_size, cyls, rpm;
 679         u8 heads, sectors;
 680
 681         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 682                                         MODE_SENSE_CURRENT);
 683
 684         if (idefloppy_queue_pc_tail(drive, &pc)) {
 685                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 686                                 " parameters\n");
 687                 return 1;
 688         }
 689         floppy->wp = !!(pc.buf[3] & 0x80);
 690         set_disk_ro(floppy->disk, floppy->wp);
 691         page = &pc.buf[8];
 692
 693         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 694         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 695         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 696         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 697         heads         = pc.buf[8 + 4];
 698         sectors       = pc.buf[8 + 5];
 699
 700         capacity = cyls * heads * sectors * sector_size;
 701
 702         if (memcmp(page, &floppy->flexible_disk_page, 32))
 703                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 704                                 "%d sector size, %d rpm\n",
 705                                 drive->name, capacity / 1024, cyls, heads,
 706                                 sectors, transfer_rate / 8, sector_size, rpm);
 707
 708         memcpy(&floppy->flexible_disk_page, page, 32);
 709         drive->bios_cyl = cyls;
 710         drive->bios_head = heads;
 711         drive->bios_sect = sectors;
 712         lba_capacity = floppy->blocks * floppy->block_size;
 713
 714         if (capacity < lba_capacity) {
 715                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 716                         "bytes, but the drive only handles %d\n",
 717                         drive->name, lba_capacity, capacity);
 718                 floppy->blocks = floppy->block_size ?
 719                         capacity / floppy->block_size : 0;
 720         }
 721         return 0;
 722 }
 723
 724 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 725 {
 726         idefloppy_floppy_t *floppy = drive->driver_data;
 727         struct ide_atapi_pc pc;
 728
 729         floppy->srfp = 0;
 730         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 731                                                  MODE_SENSE_CURRENT);
 732
 733         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 734         if (idefloppy_queue_pc_tail(drive, &pc))
 735                 return 1;
 736
 737         floppy->srfp = pc.buf[8 + 2] & 0x40;
 738         return (0);
 739 }
 740
 741 /*
 742  * Determine if a media is present in the floppy drive, and if so, its LBA
 743  * capacity.
 744  */
 745 static int ide_floppy_get_capacity(ide_drive_t *drive)
 746 {
 747         idefloppy_floppy_t *floppy = drive->driver_data;
 748         struct ide_atapi_pc pc;
 749         u8 *cap_desc;
 750         u8 header_len, desc_cnt;
 751         int i, rc = 1, blocks, length;
 752
 753         drive->bios_cyl = 0;
 754         drive->bios_head = drive->bios_sect = 0;
 755         floppy->blocks = 0;
 756         floppy->bs_factor = 1;
 757         set_capacity(floppy->disk, 0);
 758
 759         idefloppy_create_read_capacity_cmd(&pc);
 760         if (idefloppy_queue_pc_tail(drive, &pc)) {
 761                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 762                 return 1;
 763         }
 764         header_len = pc.buf[3];
 765         cap_desc = &pc.buf[4];
 766         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 767
 768         for (i = 0; i < desc_cnt; i++) {
 769                 unsigned int desc_start = 4 + i*8;
 770
 771                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 772                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 773
 774                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 775                                 i, blocks * length / 1024, blocks, length);
 776
 777                 if (i)
 778                         continue;
 779                 /*
 780                  * the code below is valid only for the 1st descriptor, ie i=0
 781                  */
 782
 783                 switch (pc.buf[desc_start + 4] & 0x03) {
 784                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 785                 case CAPACITY_UNFORMATTED:
 786                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 787                                 /*
 788                                  * If it is not a clik drive, break out
 789                                  * (maintains previous driver behaviour)
 790                                  */
 791                                 break;
 792                 case CAPACITY_CURRENT:
 793                         /* Normal Zip/LS-120 disks */
 794                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 795                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 796                                         "sector size\n", drive->name,
 797                                         blocks * length / 1024, blocks, length);
 798                         memcpy(&floppy->cap_desc, cap_desc, 8);
 799
 800                         if (!length || length % 512) {
 801                                 printk(KERN_NOTICE "%s: %d bytes block size "
 802                                         "not supported\n", drive->name, length);
 803                         } else {
 804                                 floppy->blocks = blocks;
 805                                 floppy->block_size = length;
 806                                 floppy->bs_factor = length / 512;
 807                                 if (floppy->bs_factor != 1)
 808                                         printk(KERN_NOTICE "%s: warning: non "
 809                                                 "512 bytes block size not "
 810                                                 "fully supported\n",
 811                                                 drive->name);
 812                                 rc = 0;
 813                         }
 814                         break;
 815                 case CAPACITY_NO_CARTRIDGE:
 816                         /*
 817                          * This is a KERN_ERR so it appears on screen
 818                          * for the user to see
 819                          */
 820                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 821                         break;
 822                 case CAPACITY_INVALID:
 823                         printk(KERN_ERR "%s: Invalid capacity for disk "
 824                                 "in drive\n", drive->name);
 825                         break;
 826                 }
 827                 debug_log("Descriptor 0 Code: %d\n",
 828                           pc.buf[desc_start + 4] & 0x03);
 829         }
 830
 831         /* Clik! disk does not support get_flexible_disk_page */
 832         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 833                 (void) ide_floppy_get_flexible_disk_page(drive);
 834
 835         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 836         return rc;
 837 }
 838
 839 /*
 840  * Obtain the list of formattable capacities.
 841  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 842  * descriptors to userland, instead of our own structures.
 843  *
 844  * Userland gives us the following structure:
 845  *
 846  * struct idefloppy_format_capacities {
 847  *      int nformats;
 848  *      struct {
 849  *              int nblocks;
 850  *              int blocksize;
 851  *      } formats[];
 852  * };
 853  *
 854  * userland initializes nformats to the number of allocated formats[] records.
 855  * On exit we set nformats to the number of records we've actually initialized.
 856  */
 857
 858 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 859 {
 860         struct ide_atapi_pc pc;
 861         u8 header_len, desc_cnt;
 862         int i, blocks, length, u_array_size, u_index;
 863         int __user *argp;
 864
 865         if (get_user(u_array_size, arg))
 866                 return (-EFAULT);
 867
 868         if (u_array_size <= 0)
 869                 return (-EINVAL);
 870
 871         idefloppy_create_read_capacity_cmd(&pc);
 872         if (idefloppy_queue_pc_tail(drive, &pc)) {
 873                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 874                 return (-EIO);
 875         }
 876         header_len = pc.buf[3];
 877         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 878
 879         u_index = 0;
 880         argp = arg + 1;
 881
 882         /*
 883          * We always skip the first capacity descriptor.  That's the current
 884          * capacity.  We are interested in the remaining descriptors, the
 885          * formattable capacities.
 886          */
 887         for (i = 1; i < desc_cnt; i++) {
 888                 unsigned int desc_start = 4 + i*8;
 889
 890                 if (u_index >= u_array_size)
 891                         break;  /* User-supplied buffer too small */
 892
 893                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 894                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 895
 896                 if (put_user(blocks, argp))
 897                         return(-EFAULT);
 898                 ++argp;
 899
 900                 if (put_user(length, argp))
 901                         return (-EFAULT);
 902                 ++argp;
 903
 904                 ++u_index;
 905         }
 906
 907         if (put_user(u_index, arg))
 908                 return (-EFAULT);
 909         return (0);
 910 }
 911
 912 /*
 913  * Get ATAPI_FORMAT_UNIT progress indication.
 914  *
 915  * Userland gives a pointer to an int.  The int is set to a progress
 916  * indicator 0-65536, with 65536=100%.
 917  *
 918  * If the drive does not support format progress indication, we just check
 919  * the dsc bit, and return either 0 or 65536.
 920  */
 921
 922 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 923 {
 924         idefloppy_floppy_t *floppy = drive->driver_data;
 925         struct ide_atapi_pc pc;
 926         int progress_indication = 0x10000;
 927
 928         if (floppy->srfp) {
 929                 idefloppy_create_request_sense_cmd(&pc);
 930                 if (idefloppy_queue_pc_tail(drive, &pc))
 931                         return (-EIO);
 932
 933                 if (floppy->sense_key == 2 &&
 934                     floppy->asc == 4 &&
 935                     floppy->ascq == 4)
 936                         progress_indication = floppy->progress_indication;
 937
 938                 /* Else assume format_unit has finished, and we're at 0x10000 */
 939         } else {
 940                 ide_hwif_t *hwif = drive->hwif;
 941                 unsigned long flags;
 942                 u8 stat;
 943
 944                 local_irq_save(flags);
 945                 stat = hwif->tp_ops->read_status(hwif);
 946                 local_irq_restore(flags);
 947
 948                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 949         }
 950         if (put_user(progress_indication, arg))
 951                 return (-EFAULT);
 952
 953         return (0);
 954 }
 955
 956 static sector_t idefloppy_capacity(ide_drive_t *drive)
 957 {
 958         idefloppy_floppy_t *floppy = drive->driver_data;
 959         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 960
 961         return capacity;
 962 }
 963
 964 /*
 965  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
 966  * results.
 967  */
 968 static int idefloppy_identify_device(ide_drive_t *drive, u16 *id)
 969 {
 970         u8 gcw[2];
 971         u8 device_type, protocol, removable, drq_type, packet_size;
 972
 973         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 974
 975         device_type =  gcw[1] & 0x1F;
 976         removable   = (gcw[0] & 0x80) >> 7;
 977         protocol    = (gcw[1] & 0xC0) >> 6;
 978         drq_type    = (gcw[0] & 0x60) >> 5;
 979         packet_size =  gcw[0] & 0x03;
 980
 981 #ifdef CONFIG_PPC
 982         /* kludge for Apple PowerBook internal zip */
 983         if (device_type == 5 &&
 984             !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") &&
 985             strstr((char *)&id[ATA_ID_PROD], "ZIP"))
 986                 device_type = 0;
 987 #endif
 988
 989         if (protocol != 2)
 990                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
 991                         protocol);
 992         else if (device_type != 0)
 993                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
 994                                 "to floppy\n", device_type);
 995         else if (!removable)
 996                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
 997         else if (drq_type == 3)
 998                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
 999                                 "supported\n", drq_type);
1000         else if (packet_size != 0)
1001                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1002                                 "bytes\n", packet_size);
1003         else
1004                 return 1;
1005         return 0;
1006 }
1007
1008 #ifdef CONFIG_IDE_PROC_FS
1009 static void idefloppy_add_settings(ide_drive_t *drive)
1010 {
1011         idefloppy_floppy_t *floppy = drive->driver_data;
1012
1013         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1014                         &drive->bios_cyl, NULL);
1015         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1016                         &drive->bios_head, NULL);
1017         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1018                         &drive->bios_sect, NULL);
1019         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1020                         &floppy->ticks,  NULL);
1021 }
1022 #else
1023 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1024 #endif
1025
1026 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1027 {
1028         u16 *id = drive->id;
1029         u8 gcw[2];
1030
1031         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
1032         floppy->pc = floppy->pc_stack;
1033         drive->pc_callback = ide_floppy_callback;
1034
1035         if (((gcw[0] & 0x60) >> 5) == 1)
1036                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1037         /*
1038          * We used to check revisions here. At this point however I'm giving up.
1039          * Just assume they are all broken, its easier.
1040          *
1041          * The actual reason for the workarounds was likely a driver bug after
1042          * all rather than a firmware bug, and the workaround below used to hide
1043          * it. It should be fixed as of version 1.9, but to be on the safe side
1044          * we'll leave the limitation below for the 2.2.x tree.
1045          */
1046         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
1047                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1048                 /* This value will be visible in the /proc/ide/hdx/settings */
1049                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1050                 blk_queue_max_sectors(drive->queue, 64);
1051         }
1052
1053         /*
1054          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1055          * nasty clicking noises without it, so please don't remove this.
1056          */
1057         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
1058                 blk_queue_max_sectors(drive->queue, 64);
1059                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1060         }
1061
1062         (void) ide_floppy_get_capacity(drive);
1063         idefloppy_add_settings(drive);
1064 }
1065
1066 static void ide_floppy_remove(ide_drive_t *drive)
1067 {
1068         idefloppy_floppy_t *floppy = drive->driver_data;
1069         struct gendisk *g = floppy->disk;
1070
1071         ide_proc_unregister_driver(drive, floppy->driver);
1072
1073         del_gendisk(g);
1074
1075         ide_floppy_put(floppy);
1076 }
1077
1078 static void idefloppy_cleanup_obj(struct kref *kref)
1079 {
1080         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1081         ide_drive_t *drive = floppy->drive;
1082         struct gendisk *g = floppy->disk;
1083
1084         drive->driver_data = NULL;
1085         g->private_data = NULL;
1086         put_disk(g);
1087         kfree(floppy);
1088 }
1089
1090 #ifdef CONFIG_IDE_PROC_FS
1091 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1092                 int count, int *eof, void *data)
1093 {
1094         ide_drive_t*drive = (ide_drive_t *)data;
1095         int len;
1096
1097         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1098         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1099 }
1100
1101 static ide_proc_entry_t idefloppy_proc[] = {
1102         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1103         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1104         { NULL, 0, NULL, NULL }
1105 };
1106 #endif  /* CONFIG_IDE_PROC_FS */
1107
1108 static int ide_floppy_probe(ide_drive_t *);
1109
1110 static ide_driver_t idefloppy_driver = {
1111         .gen_driver = {
1112                 .owner          = THIS_MODULE,
1113                 .name           = "ide-floppy",
1114                 .bus            = &ide_bus_type,
1115         },
1116         .probe                  = ide_floppy_probe,
1117         .remove                 = ide_floppy_remove,
1118         .version                = IDEFLOPPY_VERSION,
1119         .media                  = ide_floppy,
1120         .supports_dsc_overlap   = 0,
1121         .do_request             = idefloppy_do_request,
1122         .end_request            = idefloppy_end_request,
1123         .error                  = __ide_error,
1124 #ifdef CONFIG_IDE_PROC_FS
1125         .proc                   = idefloppy_proc,
1126 #endif
1127 };
1128
1129 static int idefloppy_open(struct inode *inode, struct file *filp)
1130 {
1131         struct gendisk *disk = inode->i_bdev->bd_disk;
1132         struct ide_floppy_obj *floppy;
1133         ide_drive_t *drive;
1134         struct ide_atapi_pc pc;
1135         int ret = 0;
1136
1137         debug_log("Reached %s\n", __func__);
1138
1139         floppy = ide_floppy_get(disk);
1140         if (!floppy)
1141                 return -ENXIO;
1142
1143         drive = floppy->drive;
1144
1145         floppy->openers++;
1146
1147         if (floppy->openers == 1) {
1148                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1149                 /* Just in case */
1150
1151                 idefloppy_init_pc(&pc);
1152                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1153
1154                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1155                         idefloppy_create_start_stop_cmd(&pc, 1);
1156                         (void) idefloppy_queue_pc_tail(drive, &pc);
1157                 }
1158
1159                 if (ide_floppy_get_capacity(drive)
1160                    && (filp->f_flags & O_NDELAY) == 0
1161                     /*
1162                      * Allow O_NDELAY to open a drive without a disk, or with an
1163                      * unreadable disk, so that we can get the format capacity
1164                      * of the drive or begin the format - Sam
1165                      */
1166                     ) {
1167                         ret = -EIO;
1168                         goto out_put_floppy;
1169                 }
1170
1171                 if (floppy->wp && (filp->f_mode & 2)) {
1172                         ret = -EROFS;
1173                         goto out_put_floppy;
1174                 }
1175                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1176                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1177                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1178                         idefloppy_create_prevent_cmd(&pc, 1);
1179                         (void) idefloppy_queue_pc_tail(drive, &pc);
1180                 }
1181                 check_disk_change(inode->i_bdev);
1182         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1183                 ret = -EBUSY;
1184                 goto out_put_floppy;
1185         }
1186         return 0;
1187
1188 out_put_floppy:
1189         floppy->openers--;
1190         ide_floppy_put(floppy);
1191         return ret;
1192 }
1193
1194 static int idefloppy_release(struct inode *inode, struct file *filp)
1195 {
1196         struct gendisk *disk = inode->i_bdev->bd_disk;
1197         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1198         ide_drive_t *drive = floppy->drive;
1199         struct ide_atapi_pc pc;
1200
1201         debug_log("Reached %s\n", __func__);
1202
1203         if (floppy->openers == 1) {
1204                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1205                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1206                         idefloppy_create_prevent_cmd(&pc, 0);
1207                         (void) idefloppy_queue_pc_tail(drive, &pc);
1208                 }
1209
1210                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1211         }
1212
1213         floppy->openers--;
1214
1215         ide_floppy_put(floppy);
1216
1217         return 0;
1218 }
1219
1220 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1221 {
1222         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1223         ide_drive_t *drive = floppy->drive;
1224
1225         geo->heads = drive->bios_head;
1226         geo->sectors = drive->bios_sect;
1227         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1228         return 0;
1229 }
1230
1231 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1232                                unsigned long arg, unsigned int cmd)
1233 {
1234         idefloppy_floppy_t *floppy = drive->driver_data;
1235
1236         if (floppy->openers > 1)
1237                 return -EBUSY;
1238
1239         /* The IOMEGA Clik! Drive doesn't support this command -
1240          * no room for an eject mechanism */
1241         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1242                 int prevent = arg ? 1 : 0;
1243
1244                 if (cmd == CDROMEJECT)
1245                         prevent = 0;
1246
1247                 idefloppy_create_prevent_cmd(pc, prevent);
1248                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1249         }
1250
1251         if (cmd == CDROMEJECT) {
1252                 idefloppy_create_start_stop_cmd(pc, 2);
1253                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1254         }
1255
1256         return 0;
1257 }
1258
1259 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1260                                   int __user *arg)
1261 {
1262         struct ide_atapi_pc pc;
1263         ide_drive_t *drive = floppy->drive;
1264         int blocks, length, flags, err = 0;
1265
1266         if (floppy->openers > 1) {
1267                 /* Don't format if someone is using the disk */
1268                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1269                 return -EBUSY;
1270         }
1271
1272         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1273
1274         /*
1275          * Send ATAPI_FORMAT_UNIT to the drive.
1276          *
1277          * Userland gives us the following structure:
1278          *
1279          * struct idefloppy_format_command {
1280          *        int nblocks;
1281          *        int blocksize;
1282          *        int flags;
1283          *        } ;
1284          *
1285          * flags is a bitmask, currently, the only defined flag is:
1286          *
1287          *        0x01 - verify media after format.
1288          */
1289         if (get_user(blocks, arg) ||
1290                         get_user(length, arg+1) ||
1291                         get_user(flags, arg+2)) {
1292                 err = -EFAULT;
1293                 goto out;
1294         }
1295
1296         (void) idefloppy_get_sfrp_bit(drive);
1297         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1298
1299         if (idefloppy_queue_pc_tail(drive, &pc))
1300                 err = -EIO;
1301
1302 out:
1303         if (err)
1304                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1305         return err;
1306 }
1307
1308
1309 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1310                         unsigned int cmd, unsigned long arg)
1311 {
1312         struct block_device *bdev = inode->i_bdev;
1313         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1314         ide_drive_t *drive = floppy->drive;
1315         struct ide_atapi_pc pc;
1316         void __user *argp = (void __user *)arg;
1317         int err;
1318
1319         switch (cmd) {
1320         case CDROMEJECT:
1321                 /* fall through */
1322         case CDROM_LOCKDOOR:
1323                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1324         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1325                 return 0;
1326         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1327                 return ide_floppy_get_format_capacities(drive, argp);
1328         case IDEFLOPPY_IOCTL_FORMAT_START:
1329                 if (!(file->f_mode & 2))
1330                         return -EPERM;
1331
1332                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1333         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1334                 return idefloppy_get_format_progress(drive, argp);
1335         }
1336
1337         /*
1338          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1339          * and CDROM_SEND_PACKET (legacy) ioctls
1340          */
1341         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1342                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1343                                         bdev->bd_disk, cmd, argp);
1344         else
1345                 err = -ENOTTY;
1346
1347         if (err == -ENOTTY)
1348                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1349
1350         return err;
1351 }
1352
1353 static int idefloppy_media_changed(struct gendisk *disk)
1354 {
1355         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1356         ide_drive_t *drive = floppy->drive;
1357         int ret;
1358
1359         /* do not scan partitions twice if this is a removable device */
1360         if (drive->attach) {
1361                 drive->attach = 0;
1362                 return 0;
1363         }
1364         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1365         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1366         return ret;
1367 }
1368
1369 static int idefloppy_revalidate_disk(struct gendisk *disk)
1370 {
1371         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1372         set_capacity(disk, idefloppy_capacity(floppy->drive));
1373         return 0;
1374 }
1375
1376 static struct block_device_operations idefloppy_ops = {
1377         .owner                  = THIS_MODULE,
1378         .open                   = idefloppy_open,
1379         .release                = idefloppy_release,
1380         .ioctl                  = idefloppy_ioctl,
1381         .getgeo                 = idefloppy_getgeo,
1382         .media_changed          = idefloppy_media_changed,
1383         .revalidate_disk        = idefloppy_revalidate_disk
1384 };
1385
1386 static int ide_floppy_probe(ide_drive_t *drive)
1387 {
1388         idefloppy_floppy_t *floppy;
1389         struct gendisk *g;
1390
1391         if (!strstr("ide-floppy", drive->driver_req))
1392                 goto failed;
1393
1394         if (drive->media != ide_floppy)
1395                 goto failed;
1396
1397         if (!idefloppy_identify_device(drive, drive->id)) {
1398                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1399                                 " of ide-floppy\n", drive->name);
1400                 goto failed;
1401         }
1402         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1403         if (!floppy) {
1404                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1405                                 " structure\n", drive->name);
1406                 goto failed;
1407         }
1408
1409         g = alloc_disk(1 << PARTN_BITS);
1410         if (!g)
1411                 goto out_free_floppy;
1412
1413         ide_init_disk(g, drive);
1414
1415         ide_proc_register_driver(drive, &idefloppy_driver);
1416
1417         kref_init(&floppy->kref);
1418
1419         floppy->drive = drive;
1420         floppy->driver = &idefloppy_driver;
1421         floppy->disk = g;
1422
1423         g->private_data = &floppy->driver;
1424
1425         drive->driver_data = floppy;
1426
1427         idefloppy_setup(drive, floppy);
1428
1429         g->minors = 1 << PARTN_BITS;
1430         g->driverfs_dev = &drive->gendev;
1431         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1432         g->fops = &idefloppy_ops;
1433         drive->attach = 1;
1434         add_disk(g);
1435         return 0;
1436
1437 out_free_floppy:
1438         kfree(floppy);
1439 failed:
1440         return -ENODEV;
1441 }
1442
1443 static void __exit idefloppy_exit(void)
1444 {
1445         driver_unregister(&idefloppy_driver.gen_driver);
1446 }
1447
1448 static int __init idefloppy_init(void)
1449 {
1450         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1451         return driver_register(&idefloppy_driver.gen_driver);
1452 }
1453
1454 MODULE_ALIAS("ide:*m-floppy*");
1455 module_init(idefloppy_init);
1456 module_exit(idefloppy_exit);
1457 MODULE_LICENSE("GPL");
1458 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1459