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 /* define to see debug info */
  50 #define IDEFLOPPY_DEBUG_LOG             0
  51
  52 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  53 #define IDEFLOPPY_DEBUG(fmt, args...)
  54
  55 #if IDEFLOPPY_DEBUG_LOG
  56 #define debug_log(fmt, args...) \
  57         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  58 #else
  59 #define debug_log(fmt, args...) do {} while (0)
  60 #endif
  61
  62
  63 /* Some drives require a longer irq timeout. */
  64 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  65
  66 /*
  67  * After each failed packet command we issue a request sense command and retry
  68  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  69  */
  70 #define IDEFLOPPY_MAX_PC_RETRIES        3
  71
  72 /*
  73  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  74  * bytes.
  75  */
  76 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  77
  78 /*
  79  * In various places in the driver, we need to allocate storage for packet
  80  * commands, which will remain valid while we leave the driver to wait for
  81  * an interrupt or a timeout event.
  82  */
  83 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  84
  85 /* format capacities descriptor codes */
  86 #define CAPACITY_INVALID        0x00
  87 #define CAPACITY_UNFORMATTED    0x01
  88 #define CAPACITY_CURRENT        0x02
  89 #define CAPACITY_NO_CARTRIDGE   0x03
  90
  91 /*
  92  * Most of our global data which we need to save even as we leave the driver
  93  * due to an interrupt or a timer event is stored in a variable of type
  94  * idefloppy_floppy_t, defined below.
  95  */
  96 typedef struct ide_floppy_obj {
  97         ide_drive_t     *drive;
  98         ide_driver_t    *driver;
  99         struct gendisk  *disk;
 100         struct kref     kref;
 101         unsigned int    openers;        /* protected by BKL for now */
 102
 103         /* Current packet command */
 104         struct ide_atapi_pc *pc;
 105         /* Last failed packet command */
 106         struct ide_atapi_pc *failed_pc;
 107         /* Packet command stack */
 108         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 109         /* Next free packet command storage space */
 110         int pc_stack_index;
 111
 112         struct request request_sense_rq;
 113
 114         /* Last error information */
 115         u8 sense_key, asc, ascq;
 116         /* delay this long before sending packet command */
 117         u8 ticks;
 118         int progress_indication;
 119
 120         /* Device information */
 121         /* Current format */
 122         int blocks, block_size, bs_factor;
 123         /* Last format capacity descriptor */
 124         u8 cap_desc[8];
 125         /* Copy of the flexible disk page */
 126         u8 flexible_disk_page[32];
 127         /* Write protect */
 128         int wp;
 129         /* Supports format progress report */
 130         int srfp;
 131 } idefloppy_floppy_t;
 132
 133 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 134
 135 /* Defines for the MODE SENSE command */
 136 #define MODE_SENSE_CURRENT              0x00
 137 #define MODE_SENSE_CHANGEABLE           0x01
 138 #define MODE_SENSE_DEFAULT              0x02
 139 #define MODE_SENSE_SAVED                0x03
 140
 141 /* IOCTLs used in low-level formatting. */
 142 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 143 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 144 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 145 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 146
 147 /* Error code returned in rq->errors to the higher part of the driver. */
 148 #define IDEFLOPPY_ERROR_GENERAL         101
 149
 150 /*
 151  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 152  * See SFF-8070i spec.
 153  */
 154 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 155 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 156
 157 static DEFINE_MUTEX(idefloppy_ref_mutex);
 158
 159 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 160
 161 #define ide_floppy_g(disk) \
 162         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 163
 164 static void idefloppy_cleanup_obj(struct kref *);
 165
 166 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 167 {
 168         struct ide_floppy_obj *floppy = NULL;
 169
 170         mutex_lock(&idefloppy_ref_mutex);
 171         floppy = ide_floppy_g(disk);
 172         if (floppy) {
 173                 if (ide_device_get(floppy->drive))
 174                         floppy = NULL;
 175                 else
 176                         kref_get(&floppy->kref);
 177         }
 178         mutex_unlock(&idefloppy_ref_mutex);
 179         return floppy;
 180 }
 181
 182 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 183 {
 184         ide_drive_t *drive = floppy->drive;
 185
 186         mutex_lock(&idefloppy_ref_mutex);
 187         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 188         ide_device_put(drive);
 189         mutex_unlock(&idefloppy_ref_mutex);
 190 }
 191
 192 /*
 193  * Used to finish servicing a request. For read/write requests, we will call
 194  * ide_end_request to pass to the next buffer.
 195  */
 196 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 197 {
 198         idefloppy_floppy_t *floppy = drive->driver_data;
 199         struct request *rq = HWGROUP(drive)->rq;
 200         int error;
 201
 202         debug_log("Reached %s\n", __func__);
 203
 204         switch (uptodate) {
 205         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 206         case 1: error = 0; break;
 207         default: error = uptodate;
 208         }
 209         if (error)
 210                 floppy->failed_pc = NULL;
 211         /* Why does this happen? */
 212         if (!rq)
 213                 return 0;
 214         if (!blk_special_request(rq)) {
 215                 /* our real local end request function */
 216                 ide_end_request(drive, uptodate, nsecs);
 217                 return 0;
 218         }
 219         rq->errors = error;
 220         /* fixme: need to move this local also */
 221         ide_end_drive_cmd(drive, 0, 0);
 222         return 0;
 223 }
 224
 225 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 226                                   unsigned int bcount, int direction)
 227 {
 228         ide_hwif_t *hwif = drive->hwif;
 229         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
 230         xfer_func_t *xf = direction ? tp_ops->output_data : tp_ops->input_data;
 231         struct scatterlist *sg = pc->sg;
 232         char *buf;
 233         int count, done = 0;
 234
 235         while (bcount) {
 236                 count = min(sg->length - pc->b_count, bcount);
 237                 if (PageHighMem(sg_page(sg))) {
 238                         unsigned long flags;
 239
 240                         local_irq_save(flags);
 241                         buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
 242                         xf(drive, NULL, buf + pc->b_count, count);
 243                         kunmap_atomic(buf - sg->offset, KM_IRQ0);
 244                         local_irq_restore(flags);
 245                 } else {
 246                         buf = sg_virt(sg);
 247                         xf(drive, NULL, buf + pc->b_count, count);
 248                 }
 249                 bcount -= count;
 250                 pc->b_count += count;
 251                 done += count;
 252
 253                 if (pc->b_count == sg->length) {
 254                         if (!--pc->sg_cnt)
 255                                 break;
 256                         pc->sg = sg = sg_next(sg);
 257                         pc->b_count = 0;
 258                 }
 259         }
 260
 261         idefloppy_end_request(drive, 1, done >> 9);
 262
 263         if (bcount) {
 264                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 265                                 drive->name, __func__, bcount);
 266                 ide_pad_transfer(drive, direction, bcount);
 267         }
 268 }
 269
 270 static void idefloppy_update_buffers(ide_drive_t *drive,
 271                                 struct ide_atapi_pc *pc)
 272 {
 273         struct request *rq = pc->rq;
 274         struct bio *bio = rq->bio;
 275
 276         while ((bio = rq->bio) != NULL)
 277                 idefloppy_end_request(drive, 1, 0);
 278 }
 279
 280 /*
 281  * Generate a new packet command request in front of the request queue, before
 282  * the current request so that it will be processed immediately, on the next
 283  * pass through the driver.
 284  */
 285 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 286                 struct request *rq)
 287 {
 288         struct ide_floppy_obj *floppy = drive->driver_data;
 289
 290         blk_rq_init(NULL, rq);
 291         rq->buffer = (char *) pc;
 292         rq->cmd_type = REQ_TYPE_SPECIAL;
 293         rq->cmd_flags |= REQ_PREEMPT;
 294         rq->rq_disk = floppy->disk;
 295         memcpy(rq->cmd, pc->c, 12);
 296         ide_do_drive_cmd(drive, rq);
 297 }
 298
 299 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 300 {
 301         idefloppy_floppy_t *floppy = drive->driver_data;
 302
 303         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 304                 floppy->pc_stack_index = 0;
 305         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 306 }
 307
 308 static void ide_floppy_callback(ide_drive_t *drive)
 309 {
 310         idefloppy_floppy_t *floppy = drive->driver_data;
 311         struct ide_atapi_pc *pc = floppy->pc;
 312         int uptodate = pc->error ? 0 : 1;
 313
 314         debug_log("Reached %s\n", __func__);
 315
 316         if (floppy->failed_pc == pc)
 317                 floppy->failed_pc = NULL;
 318
 319         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 320             (pc->rq && blk_pc_request(pc->rq)))
 321                 uptodate = 1; /* FIXME */
 322         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 323                 u8 *buf = floppy->pc->buf;
 324
 325                 if (!pc->error) {
 326                         floppy->sense_key = buf[2] & 0x0F;
 327                         floppy->asc = buf[12];
 328                         floppy->ascq = buf[13];
 329                         floppy->progress_indication = buf[15] & 0x80 ?
 330                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 331
 332                         if (floppy->failed_pc)
 333                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 334
 335                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 336                                   floppy->sense_key, floppy->asc, floppy->ascq);
 337                 } else
 338                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 339                                         "Aborting request!\n");
 340         }
 341
 342         idefloppy_end_request(drive, uptodate, 0);
 343 }
 344
 345 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 346 {
 347         memset(pc, 0, sizeof(*pc));
 348         pc->buf = pc->pc_buf;
 349         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 350 }
 351
 352 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 353 {
 354         idefloppy_init_pc(pc);
 355         pc->c[0] = GPCMD_REQUEST_SENSE;
 356         pc->c[4] = 255;
 357         pc->req_xfer = 18;
 358 }
 359
 360 /*
 361  * Called when an error was detected during the last packet command. We queue a
 362  * request sense packet command in the head of the request list.
 363  */
 364 static void idefloppy_retry_pc(ide_drive_t *drive)
 365 {
 366         struct ide_floppy_obj *floppy = drive->driver_data;
 367         struct request *rq = &floppy->request_sense_rq;
 368         struct ide_atapi_pc *pc;
 369
 370         (void)ide_read_error(drive);
 371         pc = idefloppy_next_pc_storage(drive);
 372         idefloppy_create_request_sense_cmd(pc);
 373         idefloppy_queue_pc_head(drive, pc, rq);
 374 }
 375
 376 /* The usual interrupt handler called during a packet command. */
 377 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 378 {
 379         idefloppy_floppy_t *floppy = drive->driver_data;
 380
 381         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 382                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 383                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 384 }
 385
 386 /*
 387  * What we have here is a classic case of a top half / bottom half interrupt
 388  * service routine. In interrupt mode, the device sends an interrupt to signal
 389  * that it is ready to receive a packet. However, we need to delay about 2-3
 390  * ticks before issuing the packet or we gets in trouble.
 391  */
 392 static int idefloppy_transfer_pc(ide_drive_t *drive)
 393 {
 394         idefloppy_floppy_t *floppy = drive->driver_data;
 395
 396         /* Send the actual packet */
 397         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 398
 399         /* Timeout for the packet command */
 400         return IDEFLOPPY_WAIT_CMD;
 401 }
 402
 403
 404 /*
 405  * Called as an interrupt (or directly). When the device says it's ready for a
 406  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 407  * transfer_pc.
 408  */
 409 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 410 {
 411         idefloppy_floppy_t *floppy = drive->driver_data;
 412         struct ide_atapi_pc *pc = floppy->pc;
 413         ide_expiry_t *expiry;
 414         unsigned int timeout;
 415
 416         /*
 417          * The following delay solves a problem with ATAPI Zip 100 drives
 418          * where the Busy flag was apparently being deasserted before the
 419          * unit was ready to receive data. This was happening on a
 420          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 421          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 422          * used until after the packet is moved in about 50 msec.
 423          */
 424         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 425                 timeout = floppy->ticks;
 426                 expiry = &idefloppy_transfer_pc;
 427         } else {
 428                 timeout = IDEFLOPPY_WAIT_CMD;
 429                 expiry = NULL;
 430         }
 431
 432         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 433 }
 434
 435 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 436                                     struct ide_atapi_pc *pc)
 437 {
 438         /* supress error messages resulting from Medium not present */
 439         if (floppy->sense_key == 0x02 &&
 440             floppy->asc       == 0x3a &&
 441             floppy->ascq      == 0x00)
 442                 return;
 443
 444         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 445                         "asc = %2x, ascq = %2x\n",
 446                         floppy->drive->name, pc->c[0], floppy->sense_key,
 447                         floppy->asc, floppy->ascq);
 448
 449 }
 450
 451 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 452                 struct ide_atapi_pc *pc)
 453 {
 454         idefloppy_floppy_t *floppy = drive->driver_data;
 455
 456         if (floppy->failed_pc == NULL &&
 457             pc->c[0] != GPCMD_REQUEST_SENSE)
 458                 floppy->failed_pc = pc;
 459         /* Set the current packet command */
 460         floppy->pc = pc;
 461
 462         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 463                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 464                         ide_floppy_report_error(floppy, pc);
 465                 /* Giving up */
 466                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 467
 468                 floppy->failed_pc = NULL;
 469                 drive->pc_callback(drive);
 470                 return ide_stopped;
 471         }
 472
 473         debug_log("Retry number - %d\n", pc->retries);
 474
 475         pc->retries++;
 476
 477         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 478                             IDEFLOPPY_WAIT_CMD, NULL);
 479 }
 480
 481 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 482 {
 483         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 484
 485         idefloppy_init_pc(pc);
 486         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 487         pc->c[4] = prevent;
 488 }
 489
 490 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 491 {
 492         idefloppy_init_pc(pc);
 493         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 494         pc->c[7] = 255;
 495         pc->c[8] = 255;
 496         pc->req_xfer = 255;
 497 }
 498
 499 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 500                 int l, int flags)
 501 {
 502         idefloppy_init_pc(pc);
 503         pc->c[0] = GPCMD_FORMAT_UNIT;
 504         pc->c[1] = 0x17;
 505
 506         memset(pc->buf, 0, 12);
 507         pc->buf[1] = 0xA2;
 508         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 509
 510         if (flags & 1)                          /* Verify bit on... */
 511                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 512         pc->buf[3] = 8;
 513
 514         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 515         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 516         pc->buf_size = 12;
 517         pc->flags |= PC_FLAG_WRITING;
 518 }
 519
 520 /* A mode sense command is used to "sense" floppy parameters. */
 521 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 522                 u8 page_code, u8 type)
 523 {
 524         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 525
 526         idefloppy_init_pc(pc);
 527         pc->c[0] = GPCMD_MODE_SENSE_10;
 528         pc->c[1] = 0;
 529         pc->c[2] = page_code + (type << 6);
 530
 531         switch (page_code) {
 532         case IDEFLOPPY_CAPABILITIES_PAGE:
 533                 length += 12;
 534                 break;
 535         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 536                 length += 32;
 537                 break;
 538         default:
 539                 printk(KERN_ERR "ide-floppy: unsupported page code "
 540                                 "in create_mode_sense_cmd\n");
 541         }
 542         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 543         pc->req_xfer = length;
 544 }
 545
 546 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 547 {
 548         idefloppy_init_pc(pc);
 549         pc->c[0] = GPCMD_START_STOP_UNIT;
 550         pc->c[4] = start;
 551 }
 552
 553 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 554                                     struct ide_atapi_pc *pc, struct request *rq,
 555                                     unsigned long sector)
 556 {
 557         int block = sector / floppy->bs_factor;
 558         int blocks = rq->nr_sectors / floppy->bs_factor;
 559         int cmd = rq_data_dir(rq);
 560
 561         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 562                 block, blocks);
 563
 564         idefloppy_init_pc(pc);
 565         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 566         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 567         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 568
 569         memcpy(rq->cmd, pc->c, 12);
 570
 571         pc->rq = rq;
 572         pc->b_count = 0;
 573         if (rq->cmd_flags & REQ_RW)
 574                 pc->flags |= PC_FLAG_WRITING;
 575         pc->buf = NULL;
 576         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 577         pc->flags |= PC_FLAG_DMA_OK;
 578 }
 579
 580 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 581                 struct ide_atapi_pc *pc, struct request *rq)
 582 {
 583         idefloppy_init_pc(pc);
 584         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 585         pc->rq = rq;
 586         pc->b_count = 0;
 587         if (rq->data_len && rq_data_dir(rq) == WRITE)
 588                 pc->flags |= PC_FLAG_WRITING;
 589         pc->buf = rq->data;
 590         if (rq->bio)
 591                 pc->flags |= PC_FLAG_DMA_OK;
 592         /*
 593          * possibly problematic, doesn't look like ide-floppy correctly
 594          * handled scattered requests if dma fails...
 595          */
 596         pc->req_xfer = pc->buf_size = rq->data_len;
 597 }
 598
 599 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 600                 struct request *rq, sector_t block_s)
 601 {
 602         idefloppy_floppy_t *floppy = drive->driver_data;
 603         ide_hwif_t *hwif = drive->hwif;
 604         struct ide_atapi_pc *pc;
 605         unsigned long block = (unsigned long)block_s;
 606
 607         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 608                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 609                   rq->cmd[0], rq->cmd_type, rq->errors);
 610
 611         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 612                   __func__, (long)rq->sector, rq->nr_sectors,
 613                   rq->current_nr_sectors);
 614
 615         if (rq->errors >= ERROR_MAX) {
 616                 if (floppy->failed_pc)
 617                         ide_floppy_report_error(floppy, floppy->failed_pc);
 618                 else
 619                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 620                                 drive->name);
 621                 idefloppy_end_request(drive, 0, 0);
 622                 return ide_stopped;
 623         }
 624         if (blk_fs_request(rq)) {
 625                 if (((long)rq->sector % floppy->bs_factor) ||
 626                     (rq->nr_sectors % floppy->bs_factor)) {
 627                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 628                                         drive->name);
 629                         idefloppy_end_request(drive, 0, 0);
 630                         return ide_stopped;
 631                 }
 632                 pc = idefloppy_next_pc_storage(drive);
 633                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 634         } else if (blk_special_request(rq)) {
 635                 pc = (struct ide_atapi_pc *) rq->buffer;
 636         } else if (blk_pc_request(rq)) {
 637                 pc = idefloppy_next_pc_storage(drive);
 638                 idefloppy_blockpc_cmd(floppy, pc, rq);
 639         } else {
 640                 blk_dump_rq_flags(rq,
 641                         "ide-floppy: unsupported command in queue");
 642                 idefloppy_end_request(drive, 0, 0);
 643                 return ide_stopped;
 644         }
 645
 646         ide_init_sg_cmd(drive, rq);
 647         ide_map_sg(drive, rq);
 648
 649         pc->sg = hwif->sg_table;
 650         pc->sg_cnt = hwif->sg_nents;
 651
 652         pc->rq = rq;
 653
 654         return idefloppy_issue_pc(drive, pc);
 655 }
 656
 657 /*
 658  * Add a special packet command request to the tail of the request queue,
 659  * and wait for it to be serviced.
 660  */
 661 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 662 {
 663         struct ide_floppy_obj *floppy = drive->driver_data;
 664         struct request *rq;
 665         int error;
 666
 667         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 668         rq->buffer = (char *) pc;
 669         rq->cmd_type = REQ_TYPE_SPECIAL;
 670         memcpy(rq->cmd, pc->c, 12);
 671         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 672         blk_put_request(rq);
 673
 674         return error;
 675 }
 676
 677 /*
 678  * Look at the flexible disk page parameters. We ignore the CHS capacity
 679  * parameters and use the LBA parameters instead.
 680  */
 681 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 682 {
 683         idefloppy_floppy_t *floppy = drive->driver_data;
 684         struct ide_atapi_pc pc;
 685         u8 *page;
 686         int capacity, lba_capacity;
 687         u16 transfer_rate, sector_size, cyls, rpm;
 688         u8 heads, sectors;
 689
 690         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 691                                         MODE_SENSE_CURRENT);
 692
 693         if (idefloppy_queue_pc_tail(drive, &pc)) {
 694                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 695                                 " parameters\n");
 696                 return 1;
 697         }
 698         floppy->wp = !!(pc.buf[3] & 0x80);
 699         set_disk_ro(floppy->disk, floppy->wp);
 700         page = &pc.buf[8];
 701
 702         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 703         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 704         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 705         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 706         heads         = pc.buf[8 + 4];
 707         sectors       = pc.buf[8 + 5];
 708
 709         capacity = cyls * heads * sectors * sector_size;
 710
 711         if (memcmp(page, &floppy->flexible_disk_page, 32))
 712                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 713                                 "%d sector size, %d rpm\n",
 714                                 drive->name, capacity / 1024, cyls, heads,
 715                                 sectors, transfer_rate / 8, sector_size, rpm);
 716
 717         memcpy(&floppy->flexible_disk_page, page, 32);
 718         drive->bios_cyl = cyls;
 719         drive->bios_head = heads;
 720         drive->bios_sect = sectors;
 721         lba_capacity = floppy->blocks * floppy->block_size;
 722
 723         if (capacity < lba_capacity) {
 724                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 725                         "bytes, but the drive only handles %d\n",
 726                         drive->name, lba_capacity, capacity);
 727                 floppy->blocks = floppy->block_size ?
 728                         capacity / floppy->block_size : 0;
 729         }
 730         return 0;
 731 }
 732
 733 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 734 {
 735         idefloppy_floppy_t *floppy = drive->driver_data;
 736         struct ide_atapi_pc pc;
 737
 738         floppy->srfp = 0;
 739         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 740                                                  MODE_SENSE_CURRENT);
 741
 742         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 743         if (idefloppy_queue_pc_tail(drive, &pc))
 744                 return 1;
 745
 746         floppy->srfp = pc.buf[8 + 2] & 0x40;
 747         return 0;
 748 }
 749
 750 /*
 751  * Determine if a media is present in the floppy drive, and if so, its LBA
 752  * capacity.
 753  */
 754 static int ide_floppy_get_capacity(ide_drive_t *drive)
 755 {
 756         idefloppy_floppy_t *floppy = drive->driver_data;
 757         struct ide_atapi_pc pc;
 758         u8 *cap_desc;
 759         u8 header_len, desc_cnt;
 760         int i, rc = 1, blocks, length;
 761
 762         drive->bios_cyl = 0;
 763         drive->bios_head = drive->bios_sect = 0;
 764         floppy->blocks = 0;
 765         floppy->bs_factor = 1;
 766         set_capacity(floppy->disk, 0);
 767
 768         idefloppy_create_read_capacity_cmd(&pc);
 769         if (idefloppy_queue_pc_tail(drive, &pc)) {
 770                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 771                 return 1;
 772         }
 773         header_len = pc.buf[3];
 774         cap_desc = &pc.buf[4];
 775         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 776
 777         for (i = 0; i < desc_cnt; i++) {
 778                 unsigned int desc_start = 4 + i*8;
 779
 780                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 781                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 782
 783                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 784                                 i, blocks * length / 1024, blocks, length);
 785
 786                 if (i)
 787                         continue;
 788                 /*
 789                  * the code below is valid only for the 1st descriptor, ie i=0
 790                  */
 791
 792                 switch (pc.buf[desc_start + 4] & 0x03) {
 793                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 794                 case CAPACITY_UNFORMATTED:
 795                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 796                                 /*
 797                                  * If it is not a clik drive, break out
 798                                  * (maintains previous driver behaviour)
 799                                  */
 800                                 break;
 801                 case CAPACITY_CURRENT:
 802                         /* Normal Zip/LS-120 disks */
 803                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 804                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 805                                         "sector size\n", drive->name,
 806                                         blocks * length / 1024, blocks, length);
 807                         memcpy(&floppy->cap_desc, cap_desc, 8);
 808
 809                         if (!length || length % 512) {
 810                                 printk(KERN_NOTICE "%s: %d bytes block size "
 811                                         "not supported\n", drive->name, length);
 812                         } else {
 813                                 floppy->blocks = blocks;
 814                                 floppy->block_size = length;
 815                                 floppy->bs_factor = length / 512;
 816                                 if (floppy->bs_factor != 1)
 817                                         printk(KERN_NOTICE "%s: warning: non "
 818                                                 "512 bytes block size not "
 819                                                 "fully supported\n",
 820                                                 drive->name);
 821                                 rc = 0;
 822                         }
 823                         break;
 824                 case CAPACITY_NO_CARTRIDGE:
 825                         /*
 826                          * This is a KERN_ERR so it appears on screen
 827                          * for the user to see
 828                          */
 829                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 830                         break;
 831                 case CAPACITY_INVALID:
 832                         printk(KERN_ERR "%s: Invalid capacity for disk "
 833                                 "in drive\n", drive->name);
 834                         break;
 835                 }
 836                 debug_log("Descriptor 0 Code: %d\n",
 837                           pc.buf[desc_start + 4] & 0x03);
 838         }
 839
 840         /* Clik! disk does not support get_flexible_disk_page */
 841         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 842                 (void) ide_floppy_get_flexible_disk_page(drive);
 843
 844         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 845         return rc;
 846 }
 847
 848 /*
 849  * Obtain the list of formattable capacities.
 850  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 851  * descriptors to userland, instead of our own structures.
 852  *
 853  * Userland gives us the following structure:
 854  *
 855  * struct idefloppy_format_capacities {
 856  *      int nformats;
 857  *      struct {
 858  *              int nblocks;
 859  *              int blocksize;
 860  *      } formats[];
 861  * };
 862  *
 863  * userland initializes nformats to the number of allocated formats[] records.
 864  * On exit we set nformats to the number of records we've actually initialized.
 865  */
 866
 867 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 868 {
 869         struct ide_atapi_pc pc;
 870         u8 header_len, desc_cnt;
 871         int i, blocks, length, u_array_size, u_index;
 872         int __user *argp;
 873
 874         if (get_user(u_array_size, arg))
 875                 return -EFAULT;
 876
 877         if (u_array_size <= 0)
 878                 return -EINVAL;
 879
 880         idefloppy_create_read_capacity_cmd(&pc);
 881         if (idefloppy_queue_pc_tail(drive, &pc)) {
 882                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 883                 return -EIO;
 884         }
 885
 886         header_len = pc.buf[3];
 887         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 888
 889         u_index = 0;
 890         argp = arg + 1;
 891
 892         /*
 893          * We always skip the first capacity descriptor.  That's the current
 894          * capacity.  We are interested in the remaining descriptors, the
 895          * formattable capacities.
 896          */
 897         for (i = 1; i < desc_cnt; i++) {
 898                 unsigned int desc_start = 4 + i*8;
 899
 900                 if (u_index >= u_array_size)
 901                         break;  /* User-supplied buffer too small */
 902
 903                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 904                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 905
 906                 if (put_user(blocks, argp))
 907                         return -EFAULT;
 908
 909                 ++argp;
 910
 911                 if (put_user(length, argp))
 912                         return -EFAULT;
 913
 914                 ++argp;
 915
 916                 ++u_index;
 917         }
 918
 919         if (put_user(u_index, arg))
 920                 return -EFAULT;
 921
 922         return 0;
 923 }
 924
 925 /*
 926  * Get ATAPI_FORMAT_UNIT progress indication.
 927  *
 928  * Userland gives a pointer to an int.  The int is set to a progress
 929  * indicator 0-65536, with 65536=100%.
 930  *
 931  * If the drive does not support format progress indication, we just check
 932  * the dsc bit, and return either 0 or 65536.
 933  */
 934
 935 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 936 {
 937         idefloppy_floppy_t *floppy = drive->driver_data;
 938         struct ide_atapi_pc pc;
 939         int progress_indication = 0x10000;
 940
 941         if (floppy->srfp) {
 942                 idefloppy_create_request_sense_cmd(&pc);
 943                 if (idefloppy_queue_pc_tail(drive, &pc))
 944                         return -EIO;
 945
 946                 if (floppy->sense_key == 2 &&
 947                     floppy->asc == 4 &&
 948                     floppy->ascq == 4)
 949                         progress_indication = floppy->progress_indication;
 950
 951                 /* Else assume format_unit has finished, and we're at 0x10000 */
 952         } else {
 953                 ide_hwif_t *hwif = drive->hwif;
 954                 unsigned long flags;
 955                 u8 stat;
 956
 957                 local_irq_save(flags);
 958                 stat = hwif->tp_ops->read_status(hwif);
 959                 local_irq_restore(flags);
 960
 961                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 962         }
 963
 964         if (put_user(progress_indication, arg))
 965                 return -EFAULT;
 966
 967         return 0;
 968 }
 969
 970 static sector_t idefloppy_capacity(ide_drive_t *drive)
 971 {
 972         idefloppy_floppy_t *floppy = drive->driver_data;
 973         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 974
 975         return capacity;
 976 }
 977
 978 #ifdef CONFIG_IDE_PROC_FS
 979 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 980 ide_devset_rw(bios_head, 0,  255, bios_head);
 981 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 982
 983 static int get_ticks(ide_drive_t *drive)
 984 {
 985         idefloppy_floppy_t *floppy = drive->driver_data;
 986         return floppy->ticks;
 987 }
 988
 989 static int set_ticks(ide_drive_t *drive, int arg)
 990 {
 991         idefloppy_floppy_t *floppy = drive->driver_data;
 992         floppy->ticks = arg;
 993         return 0;
 994 }
 995
 996 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
 997
 998 static const struct ide_devset *idefloppy_settings[] = {
 999         &ide_devset_bios_cyl,
1000         &ide_devset_bios_head,
1001         &ide_devset_bios_sect,
1002         &ide_devset_ticks,
1003         NULL
1004 };
1005 #endif
1006
1007 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1008 {
1009         u16 *id = drive->id;
1010         u8 gcw[2];
1011
1012         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
1013         floppy->pc = floppy->pc_stack;
1014         drive->pc_callback = ide_floppy_callback;
1015
1016         if (((gcw[0] & 0x60) >> 5) == 1)
1017                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1018         /*
1019          * We used to check revisions here. At this point however I'm giving up.
1020          * Just assume they are all broken, its easier.
1021          *
1022          * The actual reason for the workarounds was likely a driver bug after
1023          * all rather than a firmware bug, and the workaround below used to hide
1024          * it. It should be fixed as of version 1.9, but to be on the safe side
1025          * we'll leave the limitation below for the 2.2.x tree.
1026          */
1027         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
1028                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1029                 /* This value will be visible in the /proc/ide/hdx/settings */
1030                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1031                 blk_queue_max_sectors(drive->queue, 64);
1032         }
1033
1034         /*
1035          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1036          * nasty clicking noises without it, so please don't remove this.
1037          */
1038         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
1039                 blk_queue_max_sectors(drive->queue, 64);
1040                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1041         }
1042
1043         (void) ide_floppy_get_capacity(drive);
1044
1045         ide_proc_register_driver(drive, floppy->driver);
1046 }
1047
1048 static void ide_floppy_remove(ide_drive_t *drive)
1049 {
1050         idefloppy_floppy_t *floppy = drive->driver_data;
1051         struct gendisk *g = floppy->disk;
1052
1053         ide_proc_unregister_driver(drive, floppy->driver);
1054
1055         del_gendisk(g);
1056
1057         ide_floppy_put(floppy);
1058 }
1059
1060 static void idefloppy_cleanup_obj(struct kref *kref)
1061 {
1062         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1063         ide_drive_t *drive = floppy->drive;
1064         struct gendisk *g = floppy->disk;
1065
1066         drive->driver_data = NULL;
1067         g->private_data = NULL;
1068         put_disk(g);
1069         kfree(floppy);
1070 }
1071
1072 #ifdef CONFIG_IDE_PROC_FS
1073 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1074                 int count, int *eof, void *data)
1075 {
1076         ide_drive_t*drive = (ide_drive_t *)data;
1077         int len;
1078
1079         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1080         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1081 }
1082
1083 static ide_proc_entry_t idefloppy_proc[] = {
1084         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1085         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1086         { NULL, 0, NULL, NULL }
1087 };
1088 #endif  /* CONFIG_IDE_PROC_FS */
1089
1090 static int ide_floppy_probe(ide_drive_t *);
1091
1092 static ide_driver_t idefloppy_driver = {
1093         .gen_driver = {
1094                 .owner          = THIS_MODULE,
1095                 .name           = "ide-floppy",
1096                 .bus            = &ide_bus_type,
1097         },
1098         .probe                  = ide_floppy_probe,
1099         .remove                 = ide_floppy_remove,
1100         .version                = IDEFLOPPY_VERSION,
1101         .media                  = ide_floppy,
1102         .do_request             = idefloppy_do_request,
1103         .end_request            = idefloppy_end_request,
1104         .error                  = __ide_error,
1105 #ifdef CONFIG_IDE_PROC_FS
1106         .proc                   = idefloppy_proc,
1107         .settings               = idefloppy_settings,
1108 #endif
1109 };
1110
1111 static int idefloppy_open(struct inode *inode, struct file *filp)
1112 {
1113         struct gendisk *disk = inode->i_bdev->bd_disk;
1114         struct ide_floppy_obj *floppy;
1115         ide_drive_t *drive;
1116         struct ide_atapi_pc pc;
1117         int ret = 0;
1118
1119         debug_log("Reached %s\n", __func__);
1120
1121         floppy = ide_floppy_get(disk);
1122         if (!floppy)
1123                 return -ENXIO;
1124
1125         drive = floppy->drive;
1126
1127         floppy->openers++;
1128
1129         if (floppy->openers == 1) {
1130                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1131                 /* Just in case */
1132
1133                 idefloppy_init_pc(&pc);
1134                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1135
1136                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1137                         idefloppy_create_start_stop_cmd(&pc, 1);
1138                         (void) idefloppy_queue_pc_tail(drive, &pc);
1139                 }
1140
1141                 if (ide_floppy_get_capacity(drive)
1142                    && (filp->f_flags & O_NDELAY) == 0
1143                     /*
1144                      * Allow O_NDELAY to open a drive without a disk, or with an
1145                      * unreadable disk, so that we can get the format capacity
1146                      * of the drive or begin the format - Sam
1147                      */
1148                     ) {
1149                         ret = -EIO;
1150                         goto out_put_floppy;
1151                 }
1152
1153                 if (floppy->wp && (filp->f_mode & 2)) {
1154                         ret = -EROFS;
1155                         goto out_put_floppy;
1156                 }
1157                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1158                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1159                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1160                         idefloppy_create_prevent_cmd(&pc, 1);
1161                         (void) idefloppy_queue_pc_tail(drive, &pc);
1162                 }
1163                 check_disk_change(inode->i_bdev);
1164         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1165                 ret = -EBUSY;
1166                 goto out_put_floppy;
1167         }
1168         return 0;
1169
1170 out_put_floppy:
1171         floppy->openers--;
1172         ide_floppy_put(floppy);
1173         return ret;
1174 }
1175
1176 static int idefloppy_release(struct inode *inode, struct file *filp)
1177 {
1178         struct gendisk *disk = inode->i_bdev->bd_disk;
1179         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1180         ide_drive_t *drive = floppy->drive;
1181         struct ide_atapi_pc pc;
1182
1183         debug_log("Reached %s\n", __func__);
1184
1185         if (floppy->openers == 1) {
1186                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1187                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1188                         idefloppy_create_prevent_cmd(&pc, 0);
1189                         (void) idefloppy_queue_pc_tail(drive, &pc);
1190                 }
1191
1192                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1193         }
1194
1195         floppy->openers--;
1196
1197         ide_floppy_put(floppy);
1198
1199         return 0;
1200 }
1201
1202 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1203 {
1204         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1205         ide_drive_t *drive = floppy->drive;
1206
1207         geo->heads = drive->bios_head;
1208         geo->sectors = drive->bios_sect;
1209         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1210         return 0;
1211 }
1212
1213 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1214                                unsigned long arg, unsigned int cmd)
1215 {
1216         idefloppy_floppy_t *floppy = drive->driver_data;
1217
1218         if (floppy->openers > 1)
1219                 return -EBUSY;
1220
1221         /* The IOMEGA Clik! Drive doesn't support this command -
1222          * no room for an eject mechanism */
1223         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1224                 int prevent = arg ? 1 : 0;
1225
1226                 if (cmd == CDROMEJECT)
1227                         prevent = 0;
1228
1229                 idefloppy_create_prevent_cmd(pc, prevent);
1230                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1231         }
1232
1233         if (cmd == CDROMEJECT) {
1234                 idefloppy_create_start_stop_cmd(pc, 2);
1235                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1236         }
1237
1238         return 0;
1239 }
1240
1241 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1242 {
1243         idefloppy_floppy_t *floppy = drive->driver_data;
1244         struct ide_atapi_pc pc;
1245         int blocks, length, flags, err = 0;
1246
1247         if (floppy->openers > 1) {
1248                 /* Don't format if someone is using the disk */
1249                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1250                 return -EBUSY;
1251         }
1252
1253         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1254
1255         /*
1256          * Send ATAPI_FORMAT_UNIT to the drive.
1257          *
1258          * Userland gives us the following structure:
1259          *
1260          * struct idefloppy_format_command {
1261          *        int nblocks;
1262          *        int blocksize;
1263          *        int flags;
1264          *        } ;
1265          *
1266          * flags is a bitmask, currently, the only defined flag is:
1267          *
1268          *        0x01 - verify media after format.
1269          */
1270         if (get_user(blocks, arg) ||
1271                         get_user(length, arg+1) ||
1272                         get_user(flags, arg+2)) {
1273                 err = -EFAULT;
1274                 goto out;
1275         }
1276
1277         (void) idefloppy_get_sfrp_bit(drive);
1278         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1279
1280         if (idefloppy_queue_pc_tail(drive, &pc))
1281                 err = -EIO;
1282
1283 out:
1284         if (err)
1285                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1286         return err;
1287 }
1288
1289 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1290                                    unsigned int cmd, void __user *argp)
1291 {
1292         switch (cmd) {
1293         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1294                 return 0;
1295         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1296                 return ide_floppy_get_format_capacities(drive, argp);
1297         case IDEFLOPPY_IOCTL_FORMAT_START:
1298                 if (!(file->f_mode & 2))
1299                         return -EPERM;
1300                 return ide_floppy_format_unit(drive, (int __user *)argp);
1301         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1302                 return ide_floppy_get_format_progress(drive, argp);
1303         default:
1304                 return -ENOTTY;
1305         }
1306 }
1307
1308 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1309                         unsigned int cmd, unsigned long arg)
1310 {
1311         struct block_device *bdev = inode->i_bdev;
1312         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1313         ide_drive_t *drive = floppy->drive;
1314         struct ide_atapi_pc pc;
1315         void __user *argp = (void __user *)arg;
1316         int err;
1317
1318         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1319                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1320
1321         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1322         if (err != -ENOTTY)
1323                 return err;
1324
1325         /*
1326          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1327          * and CDROM_SEND_PACKET (legacy) ioctls
1328          */
1329         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1330                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1331                                         bdev->bd_disk, cmd, argp);
1332
1333         if (err == -ENOTTY)
1334                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1335
1336         return err;
1337 }
1338
1339 static int idefloppy_media_changed(struct gendisk *disk)
1340 {
1341         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1342         ide_drive_t *drive = floppy->drive;
1343         int ret;
1344
1345         /* do not scan partitions twice if this is a removable device */
1346         if (drive->attach) {
1347                 drive->attach = 0;
1348                 return 0;
1349         }
1350         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1351         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1352         return ret;
1353 }
1354
1355 static int idefloppy_revalidate_disk(struct gendisk *disk)
1356 {
1357         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1358         set_capacity(disk, idefloppy_capacity(floppy->drive));
1359         return 0;
1360 }
1361
1362 static struct block_device_operations idefloppy_ops = {
1363         .owner                  = THIS_MODULE,
1364         .open                   = idefloppy_open,
1365         .release                = idefloppy_release,
1366         .ioctl                  = idefloppy_ioctl,
1367         .getgeo                 = idefloppy_getgeo,
1368         .media_changed          = idefloppy_media_changed,
1369         .revalidate_disk        = idefloppy_revalidate_disk
1370 };
1371
1372 static int ide_floppy_probe(ide_drive_t *drive)
1373 {
1374         idefloppy_floppy_t *floppy;
1375         struct gendisk *g;
1376
1377         if (!strstr("ide-floppy", drive->driver_req))
1378                 goto failed;
1379
1380         if (drive->media != ide_floppy)
1381                 goto failed;
1382
1383         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1384                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1385                                 " of ide-floppy\n", drive->name);
1386                 goto failed;
1387         }
1388         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1389         if (!floppy) {
1390                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1391                                 " structure\n", drive->name);
1392                 goto failed;
1393         }
1394
1395         g = alloc_disk(1 << PARTN_BITS);
1396         if (!g)
1397                 goto out_free_floppy;
1398
1399         ide_init_disk(g, drive);
1400
1401         kref_init(&floppy->kref);
1402
1403         floppy->drive = drive;
1404         floppy->driver = &idefloppy_driver;
1405         floppy->disk = g;
1406
1407         g->private_data = &floppy->driver;
1408
1409         drive->driver_data = floppy;
1410
1411         idefloppy_setup(drive, floppy);
1412
1413         g->minors = 1 << PARTN_BITS;
1414         g->driverfs_dev = &drive->gendev;
1415         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1416         g->fops = &idefloppy_ops;
1417         drive->attach = 1;
1418         add_disk(g);
1419         return 0;
1420
1421 out_free_floppy:
1422         kfree(floppy);
1423 failed:
1424         return -ENODEV;
1425 }
1426
1427 static void __exit idefloppy_exit(void)
1428 {
1429         driver_unregister(&idefloppy_driver.gen_driver);
1430 }
1431
1432 static int __init idefloppy_init(void)
1433 {
1434         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1435         return driver_register(&idefloppy_driver.gen_driver);
1436 }
1437
1438 MODULE_ALIAS("ide:*m-floppy*");
1439 module_init(idefloppy_init);
1440 module_exit(idefloppy_exit);
1441 MODULE_LICENSE("GPL");
1442 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1443