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         /* Status/Action flags */
 129         unsigned long flags;
 130 } idefloppy_floppy_t;
 131
 132 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 133
 134 /* Floppy flag bits values. */
 135 enum {
 136         /* DRQ interrupt device */
 137         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
 138         /* Media may have changed */
 139         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
 140         /* Format in progress */
 141         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
 142         /* Avoid commands not supported in Clik drive */
 143         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
 144         /* Requires BH algorithm for packets */
 145         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
 146 };
 147
 148 /* Defines for the MODE SENSE command */
 149 #define MODE_SENSE_CURRENT              0x00
 150 #define MODE_SENSE_CHANGEABLE           0x01
 151 #define MODE_SENSE_DEFAULT              0x02
 152 #define MODE_SENSE_SAVED                0x03
 153
 154 /* IOCTLs used in low-level formatting. */
 155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 157 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 159
 160 /* Error code returned in rq->errors to the higher part of the driver. */
 161 #define IDEFLOPPY_ERROR_GENERAL         101
 162
 163 /*
 164  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 165  * See SFF-8070i spec.
 166  */
 167 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 169
 170 static DEFINE_MUTEX(idefloppy_ref_mutex);
 171
 172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 173
 174 #define ide_floppy_g(disk) \
 175         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 176
 177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 178 {
 179         struct ide_floppy_obj *floppy = NULL;
 180
 181         mutex_lock(&idefloppy_ref_mutex);
 182         floppy = ide_floppy_g(disk);
 183         if (floppy)
 184                 kref_get(&floppy->kref);
 185         mutex_unlock(&idefloppy_ref_mutex);
 186         return floppy;
 187 }
 188
 189 static void idefloppy_cleanup_obj(struct kref *);
 190
 191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 192 {
 193         mutex_lock(&idefloppy_ref_mutex);
 194         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 195         mutex_unlock(&idefloppy_ref_mutex);
 196 }
 197
 198 /*
 199  * Used to finish servicing a request. For read/write requests, we will call
 200  * ide_end_request to pass to the next buffer.
 201  */
 202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 203 {
 204         idefloppy_floppy_t *floppy = drive->driver_data;
 205         struct request *rq = HWGROUP(drive)->rq;
 206         int error;
 207
 208         debug_log("Reached %s\n", __func__);
 209
 210         switch (uptodate) {
 211         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 212         case 1: error = 0; break;
 213         default: error = uptodate;
 214         }
 215         if (error)
 216                 floppy->failed_pc = NULL;
 217         /* Why does this happen? */
 218         if (!rq)
 219                 return 0;
 220         if (!blk_special_request(rq)) {
 221                 /* our real local end request function */
 222                 ide_end_request(drive, uptodate, nsecs);
 223                 return 0;
 224         }
 225         rq->errors = error;
 226         /* fixme: need to move this local also */
 227         ide_end_drive_cmd(drive, 0, 0);
 228         return 0;
 229 }
 230
 231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 232                                   unsigned int bcount, int direction)
 233 {
 234         ide_hwif_t *hwif = drive->hwif;
 235         struct request *rq = pc->rq;
 236         struct req_iterator iter;
 237         struct bio_vec *bvec;
 238         unsigned long flags;
 239         int count, done = 0;
 240         char *data;
 241
 242         rq_for_each_segment(bvec, rq, iter) {
 243                 if (!bcount)
 244                         break;
 245
 246                 count = min(bvec->bv_len, bcount);
 247
 248                 data = bvec_kmap_irq(bvec, &flags);
 249                 if (direction)
 250                         hwif->output_data(drive, NULL, data, count);
 251                 else
 252                         hwif->input_data(drive, NULL, data, count);
 253                 bvec_kunmap_irq(data, &flags);
 254
 255                 bcount -= count;
 256                 pc->b_count += count;
 257                 done += count;
 258         }
 259
 260         idefloppy_end_request(drive, 1, done >> 9);
 261
 262         if (bcount) {
 263                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 264                                 drive->name, __func__, bcount);
 265                 ide_pad_transfer(drive, direction, bcount);
 266         }
 267 }
 268
 269 static void idefloppy_update_buffers(ide_drive_t *drive,
 270                                 struct ide_atapi_pc *pc)
 271 {
 272         struct request *rq = pc->rq;
 273         struct bio *bio = rq->bio;
 274
 275         while ((bio = rq->bio) != NULL)
 276                 idefloppy_end_request(drive, 1, 0);
 277 }
 278
 279 /*
 280  * Generate a new packet command request in front of the request queue, before
 281  * the current request so that it will be processed immediately, on the next
 282  * pass through the driver.
 283  */
 284 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 285                 struct request *rq)
 286 {
 287         struct ide_floppy_obj *floppy = drive->driver_data;
 288
 289         blk_rq_init(NULL, rq);
 290         rq->buffer = (char *) pc;
 291         rq->cmd_type = REQ_TYPE_SPECIAL;
 292         rq->cmd_flags |= REQ_PREEMPT;
 293         rq->rq_disk = floppy->disk;
 294         ide_do_drive_cmd(drive, rq);
 295 }
 296
 297 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 298 {
 299         idefloppy_floppy_t *floppy = drive->driver_data;
 300
 301         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 302                 floppy->pc_stack_index = 0;
 303         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 304 }
 305
 306 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 307 {
 308         idefloppy_floppy_t *floppy = drive->driver_data;
 309
 310         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 311                 floppy->rq_stack_index = 0;
 312         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 313 }
 314
 315 static void ide_floppy_callback(ide_drive_t *drive)
 316 {
 317         idefloppy_floppy_t *floppy = drive->driver_data;
 318         struct ide_atapi_pc *pc = floppy->pc;
 319         int uptodate = pc->error ? 0 : 1;
 320
 321         debug_log("Reached %s\n", __func__);
 322
 323         if (floppy->failed_pc == pc)
 324                 floppy->failed_pc = NULL;
 325
 326         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 327             (pc->rq && blk_pc_request(pc->rq)))
 328                 uptodate = 1; /* FIXME */
 329         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 330                 u8 *buf = floppy->pc->buf;
 331
 332                 if (!pc->error) {
 333                         floppy->sense_key = buf[2] & 0x0F;
 334                         floppy->asc = buf[12];
 335                         floppy->ascq = buf[13];
 336                         floppy->progress_indication = buf[15] & 0x80 ?
 337                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 338
 339                         if (floppy->failed_pc)
 340                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 341
 342                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 343                                   floppy->sense_key, floppy->asc, floppy->ascq);
 344                 } else
 345                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 346                                         "Aborting request!\n");
 347         }
 348
 349         idefloppy_end_request(drive, uptodate, 0);
 350 }
 351
 352 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 353 {
 354         memset(pc->c, 0, 12);
 355         pc->retries = 0;
 356         pc->flags = 0;
 357         pc->req_xfer = 0;
 358         pc->buf = pc->pc_buf;
 359         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 360         pc->callback = ide_floppy_callback;
 361 }
 362
 363 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 364 {
 365         idefloppy_init_pc(pc);
 366         pc->c[0] = GPCMD_REQUEST_SENSE;
 367         pc->c[4] = 255;
 368         pc->req_xfer = 18;
 369 }
 370
 371 /*
 372  * Called when an error was detected during the last packet command. We queue a
 373  * request sense packet command in the head of the request list.
 374  */
 375 static void idefloppy_retry_pc(ide_drive_t *drive)
 376 {
 377         struct ide_atapi_pc *pc;
 378         struct request *rq;
 379
 380         (void)ide_read_error(drive);
 381         pc = idefloppy_next_pc_storage(drive);
 382         rq = idefloppy_next_rq_storage(drive);
 383         idefloppy_create_request_sense_cmd(pc);
 384         idefloppy_queue_pc_head(drive, pc, rq);
 385 }
 386
 387 /* The usual interrupt handler called during a packet command. */
 388 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 389 {
 390         idefloppy_floppy_t *floppy = drive->driver_data;
 391
 392         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 393                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 394                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 395 }
 396
 397 /*
 398  * What we have here is a classic case of a top half / bottom half interrupt
 399  * service routine. In interrupt mode, the device sends an interrupt to signal
 400  * that it is ready to receive a packet. However, we need to delay about 2-3
 401  * ticks before issuing the packet or we gets in trouble.
 402  */
 403 static int idefloppy_transfer_pc(ide_drive_t *drive)
 404 {
 405         idefloppy_floppy_t *floppy = drive->driver_data;
 406
 407         /* Send the actual packet */
 408         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
 409
 410         /* Timeout for the packet command */
 411         return IDEFLOPPY_WAIT_CMD;
 412 }
 413
 414
 415 /*
 416  * Called as an interrupt (or directly). When the device says it's ready for a
 417  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 418  * transfer_pc.
 419  */
 420 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 421 {
 422         idefloppy_floppy_t *floppy = drive->driver_data;
 423         struct ide_atapi_pc *pc = floppy->pc;
 424         ide_expiry_t *expiry;
 425         unsigned int timeout;
 426
 427         /*
 428          * The following delay solves a problem with ATAPI Zip 100 drives
 429          * where the Busy flag was apparently being deasserted before the
 430          * unit was ready to receive data. This was happening on a
 431          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 432          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 433          * used until after the packet is moved in about 50 msec.
 434          */
 435         if (pc->flags & PC_FLAG_ZIP_DRIVE) {
 436                 timeout = floppy->ticks;
 437                 expiry = &idefloppy_transfer_pc;
 438         } else {
 439                 timeout = IDEFLOPPY_WAIT_CMD;
 440                 expiry = NULL;
 441         }
 442
 443         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 444 }
 445
 446 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 447                                     struct ide_atapi_pc *pc)
 448 {
 449         /* supress error messages resulting from Medium not present */
 450         if (floppy->sense_key == 0x02 &&
 451             floppy->asc       == 0x3a &&
 452             floppy->ascq      == 0x00)
 453                 return;
 454
 455         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 456                         "asc = %2x, ascq = %2x\n",
 457                         floppy->drive->name, pc->c[0], floppy->sense_key,
 458                         floppy->asc, floppy->ascq);
 459
 460 }
 461
 462 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 463                 struct ide_atapi_pc *pc)
 464 {
 465         idefloppy_floppy_t *floppy = drive->driver_data;
 466
 467         if (floppy->failed_pc == NULL &&
 468             pc->c[0] != GPCMD_REQUEST_SENSE)
 469                 floppy->failed_pc = pc;
 470         /* Set the current packet command */
 471         floppy->pc = pc;
 472
 473         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 474                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 475                         ide_floppy_report_error(floppy, pc);
 476                 /* Giving up */
 477                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 478
 479                 floppy->failed_pc = NULL;
 480                 pc->callback(drive);
 481                 return ide_stopped;
 482         }
 483
 484         debug_log("Retry number - %d\n", pc->retries);
 485
 486         pc->retries++;
 487
 488         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 489                             IDEFLOPPY_WAIT_CMD, NULL);
 490 }
 491
 492 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 493 {
 494         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 495
 496         idefloppy_init_pc(pc);
 497         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 498         pc->c[4] = prevent;
 499 }
 500
 501 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 502 {
 503         idefloppy_init_pc(pc);
 504         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 505         pc->c[7] = 255;
 506         pc->c[8] = 255;
 507         pc->req_xfer = 255;
 508 }
 509
 510 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 511                 int l, int flags)
 512 {
 513         idefloppy_init_pc(pc);
 514         pc->c[0] = GPCMD_FORMAT_UNIT;
 515         pc->c[1] = 0x17;
 516
 517         memset(pc->buf, 0, 12);
 518         pc->buf[1] = 0xA2;
 519         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 520
 521         if (flags & 1)                          /* Verify bit on... */
 522                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 523         pc->buf[3] = 8;
 524
 525         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 526         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 527         pc->buf_size = 12;
 528         pc->flags |= PC_FLAG_WRITING;
 529 }
 530
 531 /* A mode sense command is used to "sense" floppy parameters. */
 532 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 533                 u8 page_code, u8 type)
 534 {
 535         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 536
 537         idefloppy_init_pc(pc);
 538         pc->c[0] = GPCMD_MODE_SENSE_10;
 539         pc->c[1] = 0;
 540         pc->c[2] = page_code + (type << 6);
 541
 542         switch (page_code) {
 543         case IDEFLOPPY_CAPABILITIES_PAGE:
 544                 length += 12;
 545                 break;
 546         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 547                 length += 32;
 548                 break;
 549         default:
 550                 printk(KERN_ERR "ide-floppy: unsupported page code "
 551                                 "in create_mode_sense_cmd\n");
 552         }
 553         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 554         pc->req_xfer = length;
 555 }
 556
 557 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 558 {
 559         idefloppy_init_pc(pc);
 560         pc->c[0] = GPCMD_START_STOP_UNIT;
 561         pc->c[4] = start;
 562 }
 563
 564 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 565 {
 566         idefloppy_init_pc(pc);
 567         pc->c[0] = GPCMD_TEST_UNIT_READY;
 568 }
 569
 570 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 571                                     struct ide_atapi_pc *pc, struct request *rq,
 572                                     unsigned long sector)
 573 {
 574         int block = sector / floppy->bs_factor;
 575         int blocks = rq->nr_sectors / floppy->bs_factor;
 576         int cmd = rq_data_dir(rq);
 577
 578         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 579                 block, blocks);
 580
 581         idefloppy_init_pc(pc);
 582         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 583         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 584         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 585
 586         pc->rq = rq;
 587         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 588         if (rq->cmd_flags & REQ_RW)
 589                 pc->flags |= PC_FLAG_WRITING;
 590         pc->buf = NULL;
 591         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 592         pc->flags |= PC_FLAG_DMA_OK;
 593 }
 594
 595 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 596                 struct ide_atapi_pc *pc, struct request *rq)
 597 {
 598         idefloppy_init_pc(pc);
 599         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 600         pc->rq = rq;
 601         pc->b_count = rq->data_len;
 602         if (rq->data_len && rq_data_dir(rq) == WRITE)
 603                 pc->flags |= PC_FLAG_WRITING;
 604         pc->buf = rq->data;
 605         if (rq->bio)
 606                 pc->flags |= PC_FLAG_DMA_OK;
 607         /*
 608          * possibly problematic, doesn't look like ide-floppy correctly
 609          * handled scattered requests if dma fails...
 610          */
 611         pc->req_xfer = pc->buf_size = rq->data_len;
 612 }
 613
 614 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 615                 struct request *rq, sector_t block_s)
 616 {
 617         idefloppy_floppy_t *floppy = drive->driver_data;
 618         struct ide_atapi_pc *pc;
 619         unsigned long block = (unsigned long)block_s;
 620
 621         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 622                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 623                         rq->cmd_type, rq->errors);
 624         debug_log("sector: %ld, nr_sectors: %ld, "
 625                         "current_nr_sectors: %d\n", (long)rq->sector,
 626                         rq->nr_sectors, rq->current_nr_sectors);
 627
 628         if (rq->errors >= ERROR_MAX) {
 629                 if (floppy->failed_pc)
 630                         ide_floppy_report_error(floppy, floppy->failed_pc);
 631                 else
 632                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 633                                 drive->name);
 634                 idefloppy_end_request(drive, 0, 0);
 635                 return ide_stopped;
 636         }
 637         if (blk_fs_request(rq)) {
 638                 if (((long)rq->sector % floppy->bs_factor) ||
 639                     (rq->nr_sectors % floppy->bs_factor)) {
 640                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 641                                         drive->name);
 642                         idefloppy_end_request(drive, 0, 0);
 643                         return ide_stopped;
 644                 }
 645                 pc = idefloppy_next_pc_storage(drive);
 646                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 647         } else if (blk_special_request(rq)) {
 648                 pc = (struct ide_atapi_pc *) rq->buffer;
 649         } else if (blk_pc_request(rq)) {
 650                 pc = idefloppy_next_pc_storage(drive);
 651                 idefloppy_blockpc_cmd(floppy, pc, rq);
 652         } else {
 653                 blk_dump_rq_flags(rq,
 654                         "ide-floppy: unsupported command in queue");
 655                 idefloppy_end_request(drive, 0, 0);
 656                 return ide_stopped;
 657         }
 658
 659         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT)
 660                 pc->flags |= PC_FLAG_DRQ_INTERRUPT;
 661
 662         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE)
 663                 pc->flags |= PC_FLAG_ZIP_DRIVE;
 664
 665         pc->rq = rq;
 666
 667         return idefloppy_issue_pc(drive, pc);
 668 }
 669
 670 /*
 671  * Add a special packet command request to the tail of the request queue,
 672  * and wait for it to be serviced.
 673  */
 674 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 675 {
 676         struct ide_floppy_obj *floppy = drive->driver_data;
 677         struct request *rq;
 678         int error;
 679
 680         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 681         rq->buffer = (char *) pc;
 682         rq->cmd_type = REQ_TYPE_SPECIAL;
 683         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 684         blk_put_request(rq);
 685
 686         return error;
 687 }
 688
 689 /*
 690  * Look at the flexible disk page parameters. We ignore the CHS capacity
 691  * parameters and use the LBA parameters instead.
 692  */
 693 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 694 {
 695         idefloppy_floppy_t *floppy = drive->driver_data;
 696         struct ide_atapi_pc pc;
 697         u8 *page;
 698         int capacity, lba_capacity;
 699         u16 transfer_rate, sector_size, cyls, rpm;
 700         u8 heads, sectors;
 701
 702         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 703                                         MODE_SENSE_CURRENT);
 704
 705         if (idefloppy_queue_pc_tail(drive, &pc)) {
 706                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 707                                 " parameters\n");
 708                 return 1;
 709         }
 710         floppy->wp = !!(pc.buf[3] & 0x80);
 711         set_disk_ro(floppy->disk, floppy->wp);
 712         page = &pc.buf[8];
 713
 714         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
 715         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
 716         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
 717         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
 718         heads         = pc.buf[8 + 4];
 719         sectors       = pc.buf[8 + 5];
 720
 721         capacity = cyls * heads * sectors * sector_size;
 722
 723         if (memcmp(page, &floppy->flexible_disk_page, 32))
 724                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 725                                 "%d sector size, %d rpm\n",
 726                                 drive->name, capacity / 1024, cyls, heads,
 727                                 sectors, transfer_rate / 8, sector_size, rpm);
 728
 729         memcpy(&floppy->flexible_disk_page, page, 32);
 730         drive->bios_cyl = cyls;
 731         drive->bios_head = heads;
 732         drive->bios_sect = sectors;
 733         lba_capacity = floppy->blocks * floppy->block_size;
 734
 735         if (capacity < lba_capacity) {
 736                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 737                         "bytes, but the drive only handles %d\n",
 738                         drive->name, lba_capacity, capacity);
 739                 floppy->blocks = floppy->block_size ?
 740                         capacity / floppy->block_size : 0;
 741         }
 742         return 0;
 743 }
 744
 745 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 746 {
 747         idefloppy_floppy_t *floppy = drive->driver_data;
 748         struct ide_atapi_pc pc;
 749
 750         floppy->srfp = 0;
 751         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 752                                                  MODE_SENSE_CURRENT);
 753
 754         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 755         if (idefloppy_queue_pc_tail(drive, &pc))
 756                 return 1;
 757
 758         floppy->srfp = pc.buf[8 + 2] & 0x40;
 759         return (0);
 760 }
 761
 762 /*
 763  * Determine if a media is present in the floppy drive, and if so, its LBA
 764  * capacity.
 765  */
 766 static int ide_floppy_get_capacity(ide_drive_t *drive)
 767 {
 768         idefloppy_floppy_t *floppy = drive->driver_data;
 769         struct ide_atapi_pc pc;
 770         u8 *cap_desc;
 771         u8 header_len, desc_cnt;
 772         int i, rc = 1, blocks, length;
 773
 774         drive->bios_cyl = 0;
 775         drive->bios_head = drive->bios_sect = 0;
 776         floppy->blocks = 0;
 777         floppy->bs_factor = 1;
 778         set_capacity(floppy->disk, 0);
 779
 780         idefloppy_create_read_capacity_cmd(&pc);
 781         if (idefloppy_queue_pc_tail(drive, &pc)) {
 782                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 783                 return 1;
 784         }
 785         header_len = pc.buf[3];
 786         cap_desc = &pc.buf[4];
 787         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 788
 789         for (i = 0; i < desc_cnt; i++) {
 790                 unsigned int desc_start = 4 + i*8;
 791
 792                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
 793                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 794
 795                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 796                                 i, blocks * length / 1024, blocks, length);
 797
 798                 if (i)
 799                         continue;
 800                 /*
 801                  * the code below is valid only for the 1st descriptor, ie i=0
 802                  */
 803
 804                 switch (pc.buf[desc_start + 4] & 0x03) {
 805                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 806                 case CAPACITY_UNFORMATTED:
 807                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 808                                 /*
 809                                  * If it is not a clik drive, break out
 810                                  * (maintains previous driver behaviour)
 811                                  */
 812                                 break;
 813                 case CAPACITY_CURRENT:
 814                         /* Normal Zip/LS-120 disks */
 815                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 816                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 817                                         "sector size\n", drive->name,
 818                                         blocks * length / 1024, blocks, length);
 819                         memcpy(&floppy->cap_desc, cap_desc, 8);
 820
 821                         if (!length || length % 512) {
 822                                 printk(KERN_NOTICE "%s: %d bytes block size "
 823                                         "not supported\n", drive->name, length);
 824                         } else {
 825                                 floppy->blocks = blocks;
 826                                 floppy->block_size = length;
 827                                 floppy->bs_factor = length / 512;
 828                                 if (floppy->bs_factor != 1)
 829                                         printk(KERN_NOTICE "%s: warning: non "
 830                                                 "512 bytes block size not "
 831                                                 "fully supported\n",
 832                                                 drive->name);
 833                                 rc = 0;
 834                         }
 835                         break;
 836                 case CAPACITY_NO_CARTRIDGE:
 837                         /*
 838                          * This is a KERN_ERR so it appears on screen
 839                          * for the user to see
 840                          */
 841                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 842                         break;
 843                 case CAPACITY_INVALID:
 844                         printk(KERN_ERR "%s: Invalid capacity for disk "
 845                                 "in drive\n", drive->name);
 846                         break;
 847                 }
 848                 debug_log("Descriptor 0 Code: %d\n",
 849                           pc.buf[desc_start + 4] & 0x03);
 850         }
 851
 852         /* Clik! disk does not support get_flexible_disk_page */
 853         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 854                 (void) ide_floppy_get_flexible_disk_page(drive);
 855
 856         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 857         return rc;
 858 }
 859
 860 /*
 861  * Obtain the list of formattable capacities.
 862  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 863  * descriptors to userland, instead of our own structures.
 864  *
 865  * Userland gives us the following structure:
 866  *
 867  * struct idefloppy_format_capacities {
 868  *      int nformats;
 869  *      struct {
 870  *              int nblocks;
 871  *              int blocksize;
 872  *      } formats[];
 873  * };
 874  *
 875  * userland initializes nformats to the number of allocated formats[] records.
 876  * On exit we set nformats to the number of records we've actually initialized.
 877  */
 878
 879 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 880 {
 881         struct ide_atapi_pc pc;
 882         u8 header_len, desc_cnt;
 883         int i, blocks, length, u_array_size, u_index;
 884         int __user *argp;
 885
 886         if (get_user(u_array_size, arg))
 887                 return (-EFAULT);
 888
 889         if (u_array_size <= 0)
 890                 return (-EINVAL);
 891
 892         idefloppy_create_read_capacity_cmd(&pc);
 893         if (idefloppy_queue_pc_tail(drive, &pc)) {
 894                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 895                 return (-EIO);
 896         }
 897         header_len = pc.buf[3];
 898         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 899
 900         u_index = 0;
 901         argp = arg + 1;
 902
 903         /*
 904          * We always skip the first capacity descriptor.  That's the current
 905          * capacity.  We are interested in the remaining descriptors, the
 906          * formattable capacities.
 907          */
 908         for (i = 1; i < desc_cnt; i++) {
 909                 unsigned int desc_start = 4 + i*8;
 910
 911                 if (u_index >= u_array_size)
 912                         break;  /* User-supplied buffer too small */
 913
 914                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
 915                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 916
 917                 if (put_user(blocks, argp))
 918                         return(-EFAULT);
 919                 ++argp;
 920
 921                 if (put_user(length, argp))
 922                         return (-EFAULT);
 923                 ++argp;
 924
 925                 ++u_index;
 926         }
 927
 928         if (put_user(u_index, arg))
 929                 return (-EFAULT);
 930         return (0);
 931 }
 932
 933 /*
 934  * Get ATAPI_FORMAT_UNIT progress indication.
 935  *
 936  * Userland gives a pointer to an int.  The int is set to a progress
 937  * indicator 0-65536, with 65536=100%.
 938  *
 939  * If the drive does not support format progress indication, we just check
 940  * the dsc bit, and return either 0 or 65536.
 941  */
 942
 943 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 944 {
 945         idefloppy_floppy_t *floppy = drive->driver_data;
 946         struct ide_atapi_pc pc;
 947         int progress_indication = 0x10000;
 948
 949         if (floppy->srfp) {
 950                 idefloppy_create_request_sense_cmd(&pc);
 951                 if (idefloppy_queue_pc_tail(drive, &pc))
 952                         return (-EIO);
 953
 954                 if (floppy->sense_key == 2 &&
 955                     floppy->asc == 4 &&
 956                     floppy->ascq == 4)
 957                         progress_indication = floppy->progress_indication;
 958
 959                 /* Else assume format_unit has finished, and we're at 0x10000 */
 960         } else {
 961                 unsigned long flags;
 962                 u8 stat;
 963
 964                 local_irq_save(flags);
 965                 stat = ide_read_status(drive);
 966                 local_irq_restore(flags);
 967
 968                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
 969         }
 970         if (put_user(progress_indication, arg))
 971                 return (-EFAULT);
 972
 973         return (0);
 974 }
 975
 976 static sector_t idefloppy_capacity(ide_drive_t *drive)
 977 {
 978         idefloppy_floppy_t *floppy = drive->driver_data;
 979         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 980
 981         return capacity;
 982 }
 983
 984 /*
 985  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
 986  * results.
 987  */
 988 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
 989 {
 990         u8 gcw[2];
 991         u8 device_type, protocol, removable, drq_type, packet_size;
 992
 993         *((u16 *) &gcw) = id->config;
 994
 995         device_type =  gcw[1] & 0x1F;
 996         removable   = (gcw[0] & 0x80) >> 7;
 997         protocol    = (gcw[1] & 0xC0) >> 6;
 998         drq_type    = (gcw[0] & 0x60) >> 5;
 999         packet_size =  gcw[0] & 0x03;
1000
1001 #ifdef CONFIG_PPC
1002         /* kludge for Apple PowerBook internal zip */
1003         if (device_type == 5 &&
1004             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1005                 device_type = 0;
1006 #endif
1007
1008         if (protocol != 2)
1009                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1010                         protocol);
1011         else if (device_type != 0)
1012                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1013                                 "to floppy\n", device_type);
1014         else if (!removable)
1015                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1016         else if (drq_type == 3)
1017                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1018                                 "supported\n", drq_type);
1019         else if (packet_size != 0)
1020                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1021                                 "bytes\n", packet_size);
1022         else
1023                 return 1;
1024         return 0;
1025 }
1026
1027 #ifdef CONFIG_IDE_PROC_FS
1028 static void idefloppy_add_settings(ide_drive_t *drive)
1029 {
1030         idefloppy_floppy_t *floppy = drive->driver_data;
1031
1032         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1033                         &drive->bios_cyl, NULL);
1034         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1035                         &drive->bios_head, NULL);
1036         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1037                         &drive->bios_sect, NULL);
1038         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1039                         &floppy->ticks,  NULL);
1040 }
1041 #else
1042 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1043 #endif
1044
1045 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1046 {
1047         u8 gcw[2];
1048
1049         *((u16 *) &gcw) = drive->id->config;
1050         floppy->pc = floppy->pc_stack;
1051
1052         if (((gcw[0] & 0x60) >> 5) == 1)
1053                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1054         /*
1055          * We used to check revisions here. At this point however I'm giving up.
1056          * Just assume they are all broken, its easier.
1057          *
1058          * The actual reason for the workarounds was likely a driver bug after
1059          * all rather than a firmware bug, and the workaround below used to hide
1060          * it. It should be fixed as of version 1.9, but to be on the safe side
1061          * we'll leave the limitation below for the 2.2.x tree.
1062          */
1063         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1064                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1065                 /* This value will be visible in the /proc/ide/hdx/settings */
1066                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1067                 blk_queue_max_sectors(drive->queue, 64);
1068         }
1069
1070         /*
1071          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1072          * nasty clicking noises without it, so please don't remove this.
1073          */
1074         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1075                 blk_queue_max_sectors(drive->queue, 64);
1076                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1077         }
1078
1079         (void) ide_floppy_get_capacity(drive);
1080         idefloppy_add_settings(drive);
1081 }
1082
1083 static void ide_floppy_remove(ide_drive_t *drive)
1084 {
1085         idefloppy_floppy_t *floppy = drive->driver_data;
1086         struct gendisk *g = floppy->disk;
1087
1088         ide_proc_unregister_driver(drive, floppy->driver);
1089
1090         del_gendisk(g);
1091
1092         ide_floppy_put(floppy);
1093 }
1094
1095 static void idefloppy_cleanup_obj(struct kref *kref)
1096 {
1097         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1098         ide_drive_t *drive = floppy->drive;
1099         struct gendisk *g = floppy->disk;
1100
1101         drive->driver_data = NULL;
1102         g->private_data = NULL;
1103         put_disk(g);
1104         kfree(floppy);
1105 }
1106
1107 #ifdef CONFIG_IDE_PROC_FS
1108 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1109                 int count, int *eof, void *data)
1110 {
1111         ide_drive_t*drive = (ide_drive_t *)data;
1112         int len;
1113
1114         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1115         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1116 }
1117
1118 static ide_proc_entry_t idefloppy_proc[] = {
1119         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1120         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1121         { NULL, 0, NULL, NULL }
1122 };
1123 #endif  /* CONFIG_IDE_PROC_FS */
1124
1125 static int ide_floppy_probe(ide_drive_t *);
1126
1127 static ide_driver_t idefloppy_driver = {
1128         .gen_driver = {
1129                 .owner          = THIS_MODULE,
1130                 .name           = "ide-floppy",
1131                 .bus            = &ide_bus_type,
1132         },
1133         .probe                  = ide_floppy_probe,
1134         .remove                 = ide_floppy_remove,
1135         .version                = IDEFLOPPY_VERSION,
1136         .media                  = ide_floppy,
1137         .supports_dsc_overlap   = 0,
1138         .do_request             = idefloppy_do_request,
1139         .end_request            = idefloppy_end_request,
1140         .error                  = __ide_error,
1141         .abort                  = __ide_abort,
1142 #ifdef CONFIG_IDE_PROC_FS
1143         .proc                   = idefloppy_proc,
1144 #endif
1145 };
1146
1147 static int idefloppy_open(struct inode *inode, struct file *filp)
1148 {
1149         struct gendisk *disk = inode->i_bdev->bd_disk;
1150         struct ide_floppy_obj *floppy;
1151         ide_drive_t *drive;
1152         struct ide_atapi_pc pc;
1153         int ret = 0;
1154
1155         debug_log("Reached %s\n", __func__);
1156
1157         floppy = ide_floppy_get(disk);
1158         if (!floppy)
1159                 return -ENXIO;
1160
1161         drive = floppy->drive;
1162
1163         floppy->openers++;
1164
1165         if (floppy->openers == 1) {
1166                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1167                 /* Just in case */
1168
1169                 idefloppy_create_test_unit_ready_cmd(&pc);
1170                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1171                         idefloppy_create_start_stop_cmd(&pc, 1);
1172                         (void) idefloppy_queue_pc_tail(drive, &pc);
1173                 }
1174
1175                 if (ide_floppy_get_capacity(drive)
1176                    && (filp->f_flags & O_NDELAY) == 0
1177                     /*
1178                      * Allow O_NDELAY to open a drive without a disk, or with an
1179                      * unreadable disk, so that we can get the format capacity
1180                      * of the drive or begin the format - Sam
1181                      */
1182                     ) {
1183                         ret = -EIO;
1184                         goto out_put_floppy;
1185                 }
1186
1187                 if (floppy->wp && (filp->f_mode & 2)) {
1188                         ret = -EROFS;
1189                         goto out_put_floppy;
1190                 }
1191                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1192                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1193                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1194                         idefloppy_create_prevent_cmd(&pc, 1);
1195                         (void) idefloppy_queue_pc_tail(drive, &pc);
1196                 }
1197                 check_disk_change(inode->i_bdev);
1198         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1199                 ret = -EBUSY;
1200                 goto out_put_floppy;
1201         }
1202         return 0;
1203
1204 out_put_floppy:
1205         floppy->openers--;
1206         ide_floppy_put(floppy);
1207         return ret;
1208 }
1209
1210 static int idefloppy_release(struct inode *inode, struct file *filp)
1211 {
1212         struct gendisk *disk = inode->i_bdev->bd_disk;
1213         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1214         ide_drive_t *drive = floppy->drive;
1215         struct ide_atapi_pc pc;
1216
1217         debug_log("Reached %s\n", __func__);
1218
1219         if (floppy->openers == 1) {
1220                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1221                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1222                         idefloppy_create_prevent_cmd(&pc, 0);
1223                         (void) idefloppy_queue_pc_tail(drive, &pc);
1224                 }
1225
1226                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1227         }
1228
1229         floppy->openers--;
1230
1231         ide_floppy_put(floppy);
1232
1233         return 0;
1234 }
1235
1236 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1237 {
1238         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1239         ide_drive_t *drive = floppy->drive;
1240
1241         geo->heads = drive->bios_head;
1242         geo->sectors = drive->bios_sect;
1243         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1244         return 0;
1245 }
1246
1247 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1248                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1249 {
1250         if (floppy->openers > 1)
1251                 return -EBUSY;
1252
1253         /* The IOMEGA Clik! Drive doesn't support this command -
1254          * no room for an eject mechanism */
1255         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1256                 int prevent = arg ? 1 : 0;
1257
1258                 if (cmd == CDROMEJECT)
1259                         prevent = 0;
1260
1261                 idefloppy_create_prevent_cmd(pc, prevent);
1262                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1263         }
1264
1265         if (cmd == CDROMEJECT) {
1266                 idefloppy_create_start_stop_cmd(pc, 2);
1267                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1268         }
1269
1270         return 0;
1271 }
1272
1273 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1274                                   int __user *arg)
1275 {
1276         int blocks, length, flags, err = 0;
1277         struct ide_atapi_pc pc;
1278
1279         if (floppy->openers > 1) {
1280                 /* Don't format if someone is using the disk */
1281                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1282                 return -EBUSY;
1283         }
1284
1285         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1286
1287         /*
1288          * Send ATAPI_FORMAT_UNIT to the drive.
1289          *
1290          * Userland gives us the following structure:
1291          *
1292          * struct idefloppy_format_command {
1293          *        int nblocks;
1294          *        int blocksize;
1295          *        int flags;
1296          *        } ;
1297          *
1298          * flags is a bitmask, currently, the only defined flag is:
1299          *
1300          *        0x01 - verify media after format.
1301          */
1302         if (get_user(blocks, arg) ||
1303                         get_user(length, arg+1) ||
1304                         get_user(flags, arg+2)) {
1305                 err = -EFAULT;
1306                 goto out;
1307         }
1308
1309         (void) idefloppy_get_sfrp_bit(floppy->drive);
1310         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1311
1312         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1313                 err = -EIO;
1314
1315 out:
1316         if (err)
1317                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1318         return err;
1319 }
1320
1321
1322 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1323                         unsigned int cmd, unsigned long arg)
1324 {
1325         struct block_device *bdev = inode->i_bdev;
1326         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1327         ide_drive_t *drive = floppy->drive;
1328         struct ide_atapi_pc pc;
1329         void __user *argp = (void __user *)arg;
1330         int err;
1331
1332         switch (cmd) {
1333         case CDROMEJECT:
1334                 /* fall through */
1335         case CDROM_LOCKDOOR:
1336                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1337         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1338                 return 0;
1339         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1340                 return ide_floppy_get_format_capacities(drive, argp);
1341         case IDEFLOPPY_IOCTL_FORMAT_START:
1342                 if (!(file->f_mode & 2))
1343                         return -EPERM;
1344
1345                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1346         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1347                 return idefloppy_get_format_progress(drive, argp);
1348         }
1349
1350         /*
1351          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1352          * and CDROM_SEND_PACKET (legacy) ioctls
1353          */
1354         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1355                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1356                                         bdev->bd_disk, cmd, argp);
1357         else
1358                 err = -ENOTTY;
1359
1360         if (err == -ENOTTY)
1361                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1362
1363         return err;
1364 }
1365
1366 static int idefloppy_media_changed(struct gendisk *disk)
1367 {
1368         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1369         ide_drive_t *drive = floppy->drive;
1370         int ret;
1371
1372         /* do not scan partitions twice if this is a removable device */
1373         if (drive->attach) {
1374                 drive->attach = 0;
1375                 return 0;
1376         }
1377         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1378         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1379         return ret;
1380 }
1381
1382 static int idefloppy_revalidate_disk(struct gendisk *disk)
1383 {
1384         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1385         set_capacity(disk, idefloppy_capacity(floppy->drive));
1386         return 0;
1387 }
1388
1389 static struct block_device_operations idefloppy_ops = {
1390         .owner                  = THIS_MODULE,
1391         .open                   = idefloppy_open,
1392         .release                = idefloppy_release,
1393         .ioctl                  = idefloppy_ioctl,
1394         .getgeo                 = idefloppy_getgeo,
1395         .media_changed          = idefloppy_media_changed,
1396         .revalidate_disk        = idefloppy_revalidate_disk
1397 };
1398
1399 static int ide_floppy_probe(ide_drive_t *drive)
1400 {
1401         idefloppy_floppy_t *floppy;
1402         struct gendisk *g;
1403
1404         if (!strstr("ide-floppy", drive->driver_req))
1405                 goto failed;
1406         if (!drive->present)
1407                 goto failed;
1408         if (drive->media != ide_floppy)
1409                 goto failed;
1410         if (!idefloppy_identify_device(drive, drive->id)) {
1411                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1412                                 " of ide-floppy\n", drive->name);
1413                 goto failed;
1414         }
1415         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1416         if (!floppy) {
1417                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1418                                 " structure\n", drive->name);
1419                 goto failed;
1420         }
1421
1422         g = alloc_disk(1 << PARTN_BITS);
1423         if (!g)
1424                 goto out_free_floppy;
1425
1426         ide_init_disk(g, drive);
1427
1428         ide_proc_register_driver(drive, &idefloppy_driver);
1429
1430         kref_init(&floppy->kref);
1431
1432         floppy->drive = drive;
1433         floppy->driver = &idefloppy_driver;
1434         floppy->disk = g;
1435
1436         g->private_data = &floppy->driver;
1437
1438         drive->driver_data = floppy;
1439
1440         idefloppy_setup(drive, floppy);
1441
1442         g->minors = 1 << PARTN_BITS;
1443         g->driverfs_dev = &drive->gendev;
1444         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1445         g->fops = &idefloppy_ops;
1446         drive->attach = 1;
1447         add_disk(g);
1448         return 0;
1449
1450 out_free_floppy:
1451         kfree(floppy);
1452 failed:
1453         return -ENODEV;
1454 }
1455
1456 static void __exit idefloppy_exit(void)
1457 {
1458         driver_unregister(&idefloppy_driver.gen_driver);
1459 }
1460
1461 static int __init idefloppy_init(void)
1462 {
1463         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1464         return driver_register(&idefloppy_driver.gen_driver);
1465 }
1466
1467 MODULE_ALIAS("ide:*m-floppy*");
1468 module_init(idefloppy_init);
1469 module_exit(idefloppy_exit);
1470 MODULE_LICENSE("GPL");
1471 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1472