drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define DRV_NAME "ide-floppy"
  19
  20 #define IDEFLOPPY_VERSION "1.00"
  21
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/string.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/timer.h>
  28 #include <linux/mm.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/major.h>
  31 #include <linux/errno.h>
  32 #include <linux/genhd.h>
  33 #include <linux/slab.h>
  34 #include <linux/cdrom.h>
  35 #include <linux/ide.h>
  36 #include <linux/hdreg.h>
  37 #include <linux/bitops.h>
  38 #include <linux/mutex.h>
  39 #include <linux/scatterlist.h>
  40
  41 #include <scsi/scsi_ioctl.h>
  42
  43 #include <asm/byteorder.h>
  44 #include <linux/irq.h>
  45 #include <linux/uaccess.h>
  46 #include <linux/io.h>
  47 #include <asm/unaligned.h>
  48
  49 #include "ide-floppy.h"
  50
  51 /* define to see debug info */
  52 #define IDEFLOPPY_DEBUG_LOG             0
  53
  54 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  55 #define IDEFLOPPY_DEBUG(fmt, args...)
  56
  57 #if IDEFLOPPY_DEBUG_LOG
  58 #define debug_log(fmt, args...) \
  59         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  60 #else
  61 #define debug_log(fmt, args...) do {} while (0)
  62 #endif
  63
  64 /*
  65  * After each failed packet command we issue a request sense command and retry
  66  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  67  */
  68 #define IDEFLOPPY_MAX_PC_RETRIES        3
  69
  70 /* format capacities descriptor codes */
  71 #define CAPACITY_INVALID        0x00
  72 #define CAPACITY_UNFORMATTED    0x01
  73 #define CAPACITY_CURRENT        0x02
  74 #define CAPACITY_NO_CARTRIDGE   0x03
  75
  76 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
  77
  78 /* Error code returned in rq->errors to the higher part of the driver. */
  79 #define IDEFLOPPY_ERROR_GENERAL         101
  80
  81 static DEFINE_MUTEX(idefloppy_ref_mutex);
  82
  83 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
  84
  85 #define ide_floppy_g(disk) \
  86         container_of((disk)->private_data, struct ide_floppy_obj, driver)
  87
  88 static void idefloppy_cleanup_obj(struct kref *);
  89
  90 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
  91 {
  92         struct ide_floppy_obj *floppy = NULL;
  93
  94         mutex_lock(&idefloppy_ref_mutex);
  95         floppy = ide_floppy_g(disk);
  96         if (floppy) {
  97                 if (ide_device_get(floppy->drive))
  98                         floppy = NULL;
  99                 else
 100                         kref_get(&floppy->kref);
 101         }
 102         mutex_unlock(&idefloppy_ref_mutex);
 103         return floppy;
 104 }
 105
 106 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 107 {
 108         ide_drive_t *drive = floppy->drive;
 109
 110         mutex_lock(&idefloppy_ref_mutex);
 111         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 112         ide_device_put(drive);
 113         mutex_unlock(&idefloppy_ref_mutex);
 114 }
 115
 116 /*
 117  * Used to finish servicing a request. For read/write requests, we will call
 118  * ide_end_request to pass to the next buffer.
 119  */
 120 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 121 {
 122         idefloppy_floppy_t *floppy = drive->driver_data;
 123         struct request *rq = HWGROUP(drive)->rq;
 124         int error;
 125
 126         debug_log("Reached %s\n", __func__);
 127
 128         switch (uptodate) {
 129         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 130         case 1: error = 0; break;
 131         default: error = uptodate;
 132         }
 133         if (error)
 134                 floppy->failed_pc = NULL;
 135         /* Why does this happen? */
 136         if (!rq)
 137                 return 0;
 138         if (!blk_special_request(rq)) {
 139                 /* our real local end request function */
 140                 ide_end_request(drive, uptodate, nsecs);
 141                 return 0;
 142         }
 143         rq->errors = error;
 144         /* fixme: need to move this local also */
 145         ide_end_drive_cmd(drive, 0, 0);
 146         return 0;
 147 }
 148
 149 static void idefloppy_update_buffers(ide_drive_t *drive,
 150                                 struct ide_atapi_pc *pc)
 151 {
 152         struct request *rq = pc->rq;
 153         struct bio *bio = rq->bio;
 154
 155         while ((bio = rq->bio) != NULL)
 156                 idefloppy_end_request(drive, 1, 0);
 157 }
 158
 159 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
 160 {
 161         idefloppy_floppy_t *floppy = drive->driver_data;
 162         struct ide_atapi_pc *pc = drive->pc;
 163         int uptodate = pc->error ? 0 : 1;
 164
 165         debug_log("Reached %s\n", __func__);
 166
 167         if (floppy->failed_pc == pc)
 168                 floppy->failed_pc = NULL;
 169
 170         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 171             (pc->rq && blk_pc_request(pc->rq)))
 172                 uptodate = 1; /* FIXME */
 173         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 174                 u8 *buf = pc->buf;
 175
 176                 if (!pc->error) {
 177                         floppy->sense_key = buf[2] & 0x0F;
 178                         floppy->asc = buf[12];
 179                         floppy->ascq = buf[13];
 180                         floppy->progress_indication = buf[15] & 0x80 ?
 181                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 182
 183                         if (floppy->failed_pc)
 184                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 185
 186                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 187                                   floppy->sense_key, floppy->asc, floppy->ascq);
 188                 } else
 189                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 190                                         "Aborting request!\n");
 191         }
 192
 193         idefloppy_end_request(drive, uptodate, 0);
 194 }
 195
 196 void ide_floppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 197 {
 198         ide_init_pc(pc);
 199         pc->c[0] = GPCMD_REQUEST_SENSE;
 200         pc->c[4] = 255;
 201         pc->req_xfer = 18;
 202 }
 203
 204 /*
 205  * Called when an error was detected during the last packet command. We queue a
 206  * request sense packet command in the head of the request list.
 207  */
 208 static void idefloppy_retry_pc(ide_drive_t *drive)
 209 {
 210         struct ide_floppy_obj *floppy = drive->driver_data;
 211         struct request *rq = &floppy->request_sense_rq;
 212         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
 213
 214         (void)ide_read_error(drive);
 215         ide_floppy_create_request_sense_cmd(pc);
 216         ide_queue_pc_head(drive, floppy->disk, pc, rq);
 217 }
 218
 219 /* The usual interrupt handler called during a packet command. */
 220 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 221 {
 222         return ide_pc_intr(drive, idefloppy_pc_intr,
 223                            WAIT_FLOPPY_CMD, NULL, idefloppy_update_buffers,
 224                            idefloppy_retry_pc, ide_io_buffers);
 225 }
 226
 227 /*
 228  * What we have here is a classic case of a top half / bottom half interrupt
 229  * service routine. In interrupt mode, the device sends an interrupt to signal
 230  * that it is ready to receive a packet. However, we need to delay about 2-3
 231  * ticks before issuing the packet or we gets in trouble.
 232  */
 233 static int idefloppy_transfer_pc(ide_drive_t *drive)
 234 {
 235         /* Send the actual packet */
 236         drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
 237
 238         /* Timeout for the packet command */
 239         return WAIT_FLOPPY_CMD;
 240 }
 241
 242 /*
 243  * Called as an interrupt (or directly). When the device says it's ready for a
 244  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 245  * transfer_pc.
 246  */
 247 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 248 {
 249         idefloppy_floppy_t *floppy = drive->driver_data;
 250         ide_expiry_t *expiry;
 251         unsigned int timeout;
 252
 253         /*
 254          * The following delay solves a problem with ATAPI Zip 100 drives
 255          * where the Busy flag was apparently being deasserted before the
 256          * unit was ready to receive data. This was happening on a
 257          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 258          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 259          * used until after the packet is moved in about 50 msec.
 260          */
 261         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 262                 timeout = floppy->ticks;
 263                 expiry = &idefloppy_transfer_pc;
 264         } else {
 265                 timeout = WAIT_FLOPPY_CMD;
 266                 expiry = NULL;
 267         }
 268
 269         return ide_transfer_pc(drive, idefloppy_pc_intr, timeout, expiry);
 270 }
 271
 272 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 273                                     struct ide_atapi_pc *pc)
 274 {
 275         /* supress error messages resulting from Medium not present */
 276         if (floppy->sense_key == 0x02 &&
 277             floppy->asc       == 0x3a &&
 278             floppy->ascq      == 0x00)
 279                 return;
 280
 281         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 282                         "asc = %2x, ascq = %2x\n",
 283                         floppy->drive->name, pc->c[0], floppy->sense_key,
 284                         floppy->asc, floppy->ascq);
 285
 286 }
 287
 288 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 289                 struct ide_atapi_pc *pc)
 290 {
 291         idefloppy_floppy_t *floppy = drive->driver_data;
 292
 293         if (floppy->failed_pc == NULL &&
 294             pc->c[0] != GPCMD_REQUEST_SENSE)
 295                 floppy->failed_pc = pc;
 296
 297         /* Set the current packet command */
 298         drive->pc = pc;
 299
 300         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 301                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 302                         ide_floppy_report_error(floppy, pc);
 303                 /* Giving up */
 304                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 305
 306                 floppy->failed_pc = NULL;
 307                 drive->pc_callback(drive, 0);
 308                 return ide_stopped;
 309         }
 310
 311         debug_log("Retry number - %d\n", pc->retries);
 312
 313         pc->retries++;
 314
 315         return ide_issue_pc(drive, idefloppy_start_pc_transfer,
 316                             WAIT_FLOPPY_CMD, NULL);
 317 }
 318
 319 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 320 {
 321         ide_init_pc(pc);
 322         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 323         pc->c[7] = 255;
 324         pc->c[8] = 255;
 325         pc->req_xfer = 255;
 326 }
 327
 328 /* A mode sense command is used to "sense" floppy parameters. */
 329 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
 330 {
 331         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 332
 333         ide_init_pc(pc);
 334         pc->c[0] = GPCMD_MODE_SENSE_10;
 335         pc->c[1] = 0;
 336         pc->c[2] = page_code;
 337
 338         switch (page_code) {
 339         case IDEFLOPPY_CAPABILITIES_PAGE:
 340                 length += 12;
 341                 break;
 342         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 343                 length += 32;
 344                 break;
 345         default:
 346                 printk(KERN_ERR "ide-floppy: unsupported page code "
 347                                 "in create_mode_sense_cmd\n");
 348         }
 349         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 350         pc->req_xfer = length;
 351 }
 352
 353 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 354                                     struct ide_atapi_pc *pc, struct request *rq,
 355                                     unsigned long sector)
 356 {
 357         int block = sector / floppy->bs_factor;
 358         int blocks = rq->nr_sectors / floppy->bs_factor;
 359         int cmd = rq_data_dir(rq);
 360
 361         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 362                 block, blocks);
 363
 364         ide_init_pc(pc);
 365         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 366         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 367         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 368
 369         memcpy(rq->cmd, pc->c, 12);
 370
 371         pc->rq = rq;
 372         pc->b_count = 0;
 373         if (rq->cmd_flags & REQ_RW)
 374                 pc->flags |= PC_FLAG_WRITING;
 375         pc->buf = NULL;
 376         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 377         pc->flags |= PC_FLAG_DMA_OK;
 378 }
 379
 380 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 381                 struct ide_atapi_pc *pc, struct request *rq)
 382 {
 383         ide_init_pc(pc);
 384         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 385         pc->rq = rq;
 386         pc->b_count = 0;
 387         if (rq->data_len && rq_data_dir(rq) == WRITE)
 388                 pc->flags |= PC_FLAG_WRITING;
 389         pc->buf = rq->data;
 390         if (rq->bio)
 391                 pc->flags |= PC_FLAG_DMA_OK;
 392         /*
 393          * possibly problematic, doesn't look like ide-floppy correctly
 394          * handled scattered requests if dma fails...
 395          */
 396         pc->req_xfer = pc->buf_size = rq->data_len;
 397 }
 398
 399 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 400                 struct request *rq, sector_t block_s)
 401 {
 402         idefloppy_floppy_t *floppy = drive->driver_data;
 403         ide_hwif_t *hwif = drive->hwif;
 404         struct ide_atapi_pc *pc;
 405         unsigned long block = (unsigned long)block_s;
 406
 407         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 408                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 409                   rq->cmd[0], rq->cmd_type, rq->errors);
 410
 411         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 412                   __func__, (long)rq->sector, rq->nr_sectors,
 413                   rq->current_nr_sectors);
 414
 415         if (rq->errors >= ERROR_MAX) {
 416                 if (floppy->failed_pc)
 417                         ide_floppy_report_error(floppy, floppy->failed_pc);
 418                 else
 419                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 420                                 drive->name);
 421                 idefloppy_end_request(drive, 0, 0);
 422                 return ide_stopped;
 423         }
 424         if (blk_fs_request(rq)) {
 425                 if (((long)rq->sector % floppy->bs_factor) ||
 426                     (rq->nr_sectors % floppy->bs_factor)) {
 427                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 428                                         drive->name);
 429                         idefloppy_end_request(drive, 0, 0);
 430                         return ide_stopped;
 431                 }
 432                 pc = &floppy->queued_pc;
 433                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 434         } else if (blk_special_request(rq)) {
 435                 pc = (struct ide_atapi_pc *) rq->buffer;
 436         } else if (blk_pc_request(rq)) {
 437                 pc = &floppy->queued_pc;
 438                 idefloppy_blockpc_cmd(floppy, pc, rq);
 439         } else {
 440                 blk_dump_rq_flags(rq,
 441                         "ide-floppy: unsupported command in queue");
 442                 idefloppy_end_request(drive, 0, 0);
 443                 return ide_stopped;
 444         }
 445
 446         ide_init_sg_cmd(drive, rq);
 447         ide_map_sg(drive, rq);
 448
 449         pc->sg = hwif->sg_table;
 450         pc->sg_cnt = hwif->sg_nents;
 451
 452         pc->rq = rq;
 453
 454         return idefloppy_issue_pc(drive, pc);
 455 }
 456
 457 /*
 458  * Look at the flexible disk page parameters. We ignore the CHS capacity
 459  * parameters and use the LBA parameters instead.
 460  */
 461 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 462 {
 463         idefloppy_floppy_t *floppy = drive->driver_data;
 464         struct gendisk *disk = floppy->disk;
 465         struct ide_atapi_pc pc;
 466         u8 *page;
 467         int capacity, lba_capacity;
 468         u16 transfer_rate, sector_size, cyls, rpm;
 469         u8 heads, sectors;
 470
 471         ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 472
 473         if (ide_queue_pc_tail(drive, disk, &pc)) {
 474                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 475                                 " parameters\n");
 476                 return 1;
 477         }
 478
 479         if (pc.buf[3] & 0x80)
 480                 drive->atapi_flags |= IDE_AFLAG_WP;
 481         else
 482                 drive->atapi_flags &= ~IDE_AFLAG_WP;
 483
 484         set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
 485
 486         page = &pc.buf[8];
 487
 488         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 489         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 490         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 491         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 492         heads         = pc.buf[8 + 4];
 493         sectors       = pc.buf[8 + 5];
 494
 495         capacity = cyls * heads * sectors * sector_size;
 496
 497         if (memcmp(page, &floppy->flexible_disk_page, 32))
 498                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 499                                 "%d sector size, %d rpm\n",
 500                                 drive->name, capacity / 1024, cyls, heads,
 501                                 sectors, transfer_rate / 8, sector_size, rpm);
 502
 503         memcpy(&floppy->flexible_disk_page, page, 32);
 504         drive->bios_cyl = cyls;
 505         drive->bios_head = heads;
 506         drive->bios_sect = sectors;
 507         lba_capacity = floppy->blocks * floppy->block_size;
 508
 509         if (capacity < lba_capacity) {
 510                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 511                         "bytes, but the drive only handles %d\n",
 512                         drive->name, lba_capacity, capacity);
 513                 floppy->blocks = floppy->block_size ?
 514                         capacity / floppy->block_size : 0;
 515         }
 516         return 0;
 517 }
 518
 519 /*
 520  * Determine if a media is present in the floppy drive, and if so, its LBA
 521  * capacity.
 522  */
 523 static int ide_floppy_get_capacity(ide_drive_t *drive)
 524 {
 525         idefloppy_floppy_t *floppy = drive->driver_data;
 526         struct gendisk *disk = floppy->disk;
 527         struct ide_atapi_pc pc;
 528         u8 *cap_desc;
 529         u8 header_len, desc_cnt;
 530         int i, rc = 1, blocks, length;
 531
 532         drive->bios_cyl = 0;
 533         drive->bios_head = drive->bios_sect = 0;
 534         floppy->blocks = 0;
 535         floppy->bs_factor = 1;
 536         set_capacity(floppy->disk, 0);
 537
 538         ide_floppy_create_read_capacity_cmd(&pc);
 539         if (ide_queue_pc_tail(drive, disk, &pc)) {
 540                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 541                 return 1;
 542         }
 543         header_len = pc.buf[3];
 544         cap_desc = &pc.buf[4];
 545         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 546
 547         for (i = 0; i < desc_cnt; i++) {
 548                 unsigned int desc_start = 4 + i*8;
 549
 550                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 551                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 552
 553                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 554                                 i, blocks * length / 1024, blocks, length);
 555
 556                 if (i)
 557                         continue;
 558                 /*
 559                  * the code below is valid only for the 1st descriptor, ie i=0
 560                  */
 561
 562                 switch (pc.buf[desc_start + 4] & 0x03) {
 563                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 564                 case CAPACITY_UNFORMATTED:
 565                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 566                                 /*
 567                                  * If it is not a clik drive, break out
 568                                  * (maintains previous driver behaviour)
 569                                  */
 570                                 break;
 571                 case CAPACITY_CURRENT:
 572                         /* Normal Zip/LS-120 disks */
 573                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 574                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 575                                         "sector size\n", drive->name,
 576                                         blocks * length / 1024, blocks, length);
 577                         memcpy(&floppy->cap_desc, cap_desc, 8);
 578
 579                         if (!length || length % 512) {
 580                                 printk(KERN_NOTICE "%s: %d bytes block size "
 581                                         "not supported\n", drive->name, length);
 582                         } else {
 583                                 floppy->blocks = blocks;
 584                                 floppy->block_size = length;
 585                                 floppy->bs_factor = length / 512;
 586                                 if (floppy->bs_factor != 1)
 587                                         printk(KERN_NOTICE "%s: warning: non "
 588                                                 "512 bytes block size not "
 589                                                 "fully supported\n",
 590                                                 drive->name);
 591                                 rc = 0;
 592                         }
 593                         break;
 594                 case CAPACITY_NO_CARTRIDGE:
 595                         /*
 596                          * This is a KERN_ERR so it appears on screen
 597                          * for the user to see
 598                          */
 599                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 600                         break;
 601                 case CAPACITY_INVALID:
 602                         printk(KERN_ERR "%s: Invalid capacity for disk "
 603                                 "in drive\n", drive->name);
 604                         break;
 605                 }
 606                 debug_log("Descriptor 0 Code: %d\n",
 607                           pc.buf[desc_start + 4] & 0x03);
 608         }
 609
 610         /* Clik! disk does not support get_flexible_disk_page */
 611         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 612                 (void) ide_floppy_get_flexible_disk_page(drive);
 613
 614         set_capacity(disk, floppy->blocks * floppy->bs_factor);
 615
 616         return rc;
 617 }
 618
 619 static sector_t idefloppy_capacity(ide_drive_t *drive)
 620 {
 621         idefloppy_floppy_t *floppy = drive->driver_data;
 622         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 623
 624         return capacity;
 625 }
 626
 627 #ifdef CONFIG_IDE_PROC_FS
 628 ide_devset_rw_field(bios_cyl, bios_cyl);
 629 ide_devset_rw_field(bios_head, bios_head);
 630 ide_devset_rw_field(bios_sect, bios_sect);
 631
 632 static int get_ticks(ide_drive_t *drive)
 633 {
 634         idefloppy_floppy_t *floppy = drive->driver_data;
 635         return floppy->ticks;
 636 }
 637
 638 static int set_ticks(ide_drive_t *drive, int arg)
 639 {
 640         idefloppy_floppy_t *floppy = drive->driver_data;
 641         floppy->ticks = arg;
 642         return 0;
 643 }
 644
 645 IDE_DEVSET(ticks, DS_SYNC, get_ticks, set_ticks);
 646
 647 static const struct ide_proc_devset idefloppy_settings[] = {
 648         IDE_PROC_DEVSET(bios_cyl,  0, 1023),
 649         IDE_PROC_DEVSET(bios_head, 0,  255),
 650         IDE_PROC_DEVSET(bios_sect, 0,   63),
 651         IDE_PROC_DEVSET(ticks,     0,  255),
 652         { 0 },
 653 };
 654 #endif
 655
 656 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 657 {
 658         u16 *id = drive->id;
 659         u8 gcw[2];
 660
 661         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
 662
 663         drive->pc_callback = ide_floppy_callback;
 664
 665         if (((gcw[0] & 0x60) >> 5) == 1)
 666                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
 667         /*
 668          * We used to check revisions here. At this point however I'm giving up.
 669          * Just assume they are all broken, its easier.
 670          *
 671          * The actual reason for the workarounds was likely a driver bug after
 672          * all rather than a firmware bug, and the workaround below used to hide
 673          * it. It should be fixed as of version 1.9, but to be on the safe side
 674          * we'll leave the limitation below for the 2.2.x tree.
 675          */
 676         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
 677                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
 678                 /* This value will be visible in the /proc/ide/hdx/settings */
 679                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
 680                 blk_queue_max_sectors(drive->queue, 64);
 681         }
 682
 683         /*
 684          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
 685          * nasty clicking noises without it, so please don't remove this.
 686          */
 687         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
 688                 blk_queue_max_sectors(drive->queue, 64);
 689                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
 690                 /* IOMEGA Clik! drives do not support lock/unlock commands */
 691                 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
 692         }
 693
 694         (void) ide_floppy_get_capacity(drive);
 695
 696         ide_proc_register_driver(drive, floppy->driver);
 697 }
 698
 699 static void ide_floppy_remove(ide_drive_t *drive)
 700 {
 701         idefloppy_floppy_t *floppy = drive->driver_data;
 702         struct gendisk *g = floppy->disk;
 703
 704         ide_proc_unregister_driver(drive, floppy->driver);
 705
 706         del_gendisk(g);
 707
 708         ide_floppy_put(floppy);
 709 }
 710
 711 static void idefloppy_cleanup_obj(struct kref *kref)
 712 {
 713         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
 714         ide_drive_t *drive = floppy->drive;
 715         struct gendisk *g = floppy->disk;
 716
 717         drive->driver_data = NULL;
 718         g->private_data = NULL;
 719         put_disk(g);
 720         kfree(floppy);
 721 }
 722
 723 #ifdef CONFIG_IDE_PROC_FS
 724 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
 725                 int count, int *eof, void *data)
 726 {
 727         ide_drive_t*drive = (ide_drive_t *)data;
 728         int len;
 729
 730         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
 731         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 732 }
 733
 734 static ide_proc_entry_t idefloppy_proc[] = {
 735         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
 736         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
 737         { NULL, 0, NULL, NULL }
 738 };
 739 #endif  /* CONFIG_IDE_PROC_FS */
 740
 741 static int ide_floppy_probe(ide_drive_t *);
 742
 743 static ide_driver_t idefloppy_driver = {
 744         .gen_driver = {
 745                 .owner          = THIS_MODULE,
 746                 .name           = "ide-floppy",
 747                 .bus            = &ide_bus_type,
 748         },
 749         .probe                  = ide_floppy_probe,
 750         .remove                 = ide_floppy_remove,
 751         .version                = IDEFLOPPY_VERSION,
 752         .media                  = ide_floppy,
 753         .do_request             = idefloppy_do_request,
 754         .end_request            = idefloppy_end_request,
 755         .error                  = __ide_error,
 756 #ifdef CONFIG_IDE_PROC_FS
 757         .proc                   = idefloppy_proc,
 758         .settings               = idefloppy_settings,
 759 #endif
 760 };
 761
 762 static int idefloppy_open(struct inode *inode, struct file *filp)
 763 {
 764         struct gendisk *disk = inode->i_bdev->bd_disk;
 765         struct ide_floppy_obj *floppy;
 766         ide_drive_t *drive;
 767         int ret = 0;
 768
 769         debug_log("Reached %s\n", __func__);
 770
 771         floppy = ide_floppy_get(disk);
 772         if (!floppy)
 773                 return -ENXIO;
 774
 775         drive = floppy->drive;
 776
 777         floppy->openers++;
 778
 779         if (floppy->openers == 1) {
 780                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
 781                 /* Just in case */
 782
 783                 if (ide_do_test_unit_ready(drive, disk))
 784                         ide_do_start_stop(drive, disk, 1);
 785
 786                 if (ide_floppy_get_capacity(drive)
 787                    && (filp->f_flags & O_NDELAY) == 0
 788                     /*
 789                      * Allow O_NDELAY to open a drive without a disk, or with an
 790                      * unreadable disk, so that we can get the format capacity
 791                      * of the drive or begin the format - Sam
 792                      */
 793                     ) {
 794                         ret = -EIO;
 795                         goto out_put_floppy;
 796                 }
 797
 798                 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
 799                         ret = -EROFS;
 800                         goto out_put_floppy;
 801                 }
 802
 803                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
 804                 ide_set_media_lock(drive, disk, 1);
 805                 check_disk_change(inode->i_bdev);
 806         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
 807                 ret = -EBUSY;
 808                 goto out_put_floppy;
 809         }
 810         return 0;
 811
 812 out_put_floppy:
 813         floppy->openers--;
 814         ide_floppy_put(floppy);
 815         return ret;
 816 }
 817
 818 static int idefloppy_release(struct inode *inode, struct file *filp)
 819 {
 820         struct gendisk *disk = inode->i_bdev->bd_disk;
 821         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 822         ide_drive_t *drive = floppy->drive;
 823
 824         debug_log("Reached %s\n", __func__);
 825
 826         if (floppy->openers == 1) {
 827                 ide_set_media_lock(drive, disk, 0);
 828                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
 829         }
 830
 831         floppy->openers--;
 832
 833         ide_floppy_put(floppy);
 834
 835         return 0;
 836 }
 837
 838 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 839 {
 840         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
 841         ide_drive_t *drive = floppy->drive;
 842
 843         geo->heads = drive->bios_head;
 844         geo->sectors = drive->bios_sect;
 845         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
 846         return 0;
 847 }
 848
 849 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
 850                                unsigned long arg, unsigned int cmd)
 851 {
 852         idefloppy_floppy_t *floppy = drive->driver_data;
 853         struct gendisk *disk = floppy->disk;
 854         int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
 855
 856         if (floppy->openers > 1)
 857                 return -EBUSY;
 858
 859         ide_set_media_lock(drive, disk, prevent);
 860
 861         if (cmd == CDROMEJECT)
 862                 ide_do_start_stop(drive, disk, 2);
 863
 864         return 0;
 865 }
 866
 867 static int idefloppy_ioctl(struct inode *inode, struct file *file,
 868                         unsigned int cmd, unsigned long arg)
 869 {
 870         struct block_device *bdev = inode->i_bdev;
 871         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
 872         ide_drive_t *drive = floppy->drive;
 873         struct ide_atapi_pc pc;
 874         void __user *argp = (void __user *)arg;
 875         int err;
 876
 877         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
 878                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
 879
 880         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
 881         if (err != -ENOTTY)
 882                 return err;
 883
 884         /*
 885          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
 886          * and CDROM_SEND_PACKET (legacy) ioctls
 887          */
 888         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
 889                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
 890                                         bdev->bd_disk, cmd, argp);
 891
 892         if (err == -ENOTTY)
 893                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
 894
 895         return err;
 896 }
 897
 898 static int idefloppy_media_changed(struct gendisk *disk)
 899 {
 900         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 901         ide_drive_t *drive = floppy->drive;
 902         int ret;
 903
 904         /* do not scan partitions twice if this is a removable device */
 905         if (drive->attach) {
 906                 drive->attach = 0;
 907                 return 0;
 908         }
 909         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
 910         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
 911         return ret;
 912 }
 913
 914 static int idefloppy_revalidate_disk(struct gendisk *disk)
 915 {
 916         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 917         set_capacity(disk, idefloppy_capacity(floppy->drive));
 918         return 0;
 919 }
 920
 921 static struct block_device_operations idefloppy_ops = {
 922         .owner                  = THIS_MODULE,
 923         .open                   = idefloppy_open,
 924         .release                = idefloppy_release,
 925         .ioctl                  = idefloppy_ioctl,
 926         .getgeo                 = idefloppy_getgeo,
 927         .media_changed          = idefloppy_media_changed,
 928         .revalidate_disk        = idefloppy_revalidate_disk
 929 };
 930
 931 static int ide_floppy_probe(ide_drive_t *drive)
 932 {
 933         idefloppy_floppy_t *floppy;
 934         struct gendisk *g;
 935
 936         if (!strstr("ide-floppy", drive->driver_req))
 937                 goto failed;
 938
 939         if (drive->media != ide_floppy)
 940                 goto failed;
 941
 942         if (!ide_check_atapi_device(drive, DRV_NAME)) {
 943                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
 944                                 " of ide-floppy\n", drive->name);
 945                 goto failed;
 946         }
 947         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
 948         if (!floppy) {
 949                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
 950                                 " structure\n", drive->name);
 951                 goto failed;
 952         }
 953
 954         g = alloc_disk(1 << PARTN_BITS);
 955         if (!g)
 956                 goto out_free_floppy;
 957
 958         ide_init_disk(g, drive);
 959
 960         kref_init(&floppy->kref);
 961
 962         floppy->drive = drive;
 963         floppy->driver = &idefloppy_driver;
 964         floppy->disk = g;
 965
 966         g->private_data = &floppy->driver;
 967
 968         drive->driver_data = floppy;
 969
 970         idefloppy_setup(drive, floppy);
 971
 972         g->minors = 1 << PARTN_BITS;
 973         g->driverfs_dev = &drive->gendev;
 974         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
 975         g->fops = &idefloppy_ops;
 976         drive->attach = 1;
 977         add_disk(g);
 978         return 0;
 979
 980 out_free_floppy:
 981         kfree(floppy);
 982 failed:
 983         return -ENODEV;
 984 }
 985
 986 static void __exit idefloppy_exit(void)
 987 {
 988         driver_unregister(&idefloppy_driver.gen_driver);
 989 }
 990
 991 static int __init idefloppy_init(void)
 992 {
 993         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
 994         return driver_register(&idefloppy_driver.gen_driver);
 995 }
 996
 997 MODULE_ALIAS("ide:*m-floppy*");
 998 MODULE_ALIAS("ide-floppy");
 999 module_init(idefloppy_init);
1000 module_exit(idefloppy_exit);
1001 MODULE_LICENSE("GPL");
1002 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1003