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