drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define IDEFLOPPY_VERSION "1.00"
  19
  20 #include <linux/module.h>
  21 #include <linux/types.h>
  22 #include <linux/string.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/timer.h>
  26 #include <linux/mm.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/major.h>
  29 #include <linux/errno.h>
  30 #include <linux/genhd.h>
  31 #include <linux/slab.h>
  32 #include <linux/cdrom.h>
  33 #include <linux/ide.h>
  34 #include <linux/bitops.h>
  35 #include <linux/mutex.h>
  36
  37 #include <scsi/scsi_ioctl.h>
  38
  39 #include <asm/byteorder.h>
  40 #include <linux/irq.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/io.h>
  43 #include <asm/unaligned.h>
  44
  45 /* define to see debug info */
  46 #define IDEFLOPPY_DEBUG_LOG             0
  47
  48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  49 #define IDEFLOPPY_DEBUG(fmt, args...)
  50
  51 #if IDEFLOPPY_DEBUG_LOG
  52 #define debug_log(fmt, args...) \
  53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  54 #else
  55 #define debug_log(fmt, args...) do {} while (0)
  56 #endif
  57
  58
  59 /* Some drives require a longer irq timeout. */
  60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  61
  62 /*
  63  * After each failed packet command we issue a request sense command and retry
  64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  65  */
  66 #define IDEFLOPPY_MAX_PC_RETRIES        3
  67
  68 /*
  69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  70  * bytes.
  71  */
  72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  73
  74 /*
  75  * In various places in the driver, we need to allocate storage for packet
  76  * commands and requests, which will remain valid while we leave the driver to
  77  * wait for an interrupt or a timeout event.
  78  */
  79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  80
  81 /* format capacities descriptor codes */
  82 #define CAPACITY_INVALID        0x00
  83 #define CAPACITY_UNFORMATTED    0x01
  84 #define CAPACITY_CURRENT        0x02
  85 #define CAPACITY_NO_CARTRIDGE   0x03
  86
  87 /*
  88  * Most of our global data which we need to save even as we leave the driver
  89  * due to an interrupt or a timer event is stored in a variable of type
  90  * idefloppy_floppy_t, defined below.
  91  */
  92 typedef struct ide_floppy_obj {
  93         ide_drive_t     *drive;
  94         ide_driver_t    *driver;
  95         struct gendisk  *disk;
  96         struct kref     kref;
  97         unsigned int    openers;        /* protected by BKL for now */
  98
  99         /* Current packet command */
 100         struct ide_atapi_pc *pc;
 101         /* Last failed packet command */
 102         struct ide_atapi_pc *failed_pc;
 103         /* Packet command stack */
 104         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 105         /* Next free packet command storage space */
 106         int pc_stack_index;
 107         struct request rq_stack[IDEFLOPPY_PC_STACK];
 108         /* We implement a circular array */
 109         int rq_stack_index;
 110
 111         /* Last error information */
 112         u8 sense_key, asc, ascq;
 113         /* delay this long before sending packet command */
 114         u8 ticks;
 115         int progress_indication;
 116
 117         /* Device information */
 118         /* Current format */
 119         int blocks, block_size, bs_factor;
 120         /* Last format capacity descriptor */
 121         u8 cap_desc[8];
 122         /* Copy of the flexible disk page */
 123         u8 flexible_disk_page[32];
 124         /* Write protect */
 125         int wp;
 126         /* Supports format progress report */
 127         int srfp;
 128         /* Status/Action flags */
 129         unsigned long flags;
 130 } idefloppy_floppy_t;
 131
 132 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 133
 134 /* Floppy flag bits values. */
 135 enum {
 136         /* DRQ interrupt device */
 137         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
 138         /* Media may have changed */
 139         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
 140         /* Format in progress */
 141         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
 142         /* Avoid commands not supported in Clik drive */
 143         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
 144         /* Requires BH algorithm for packets */
 145         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
 146 };
 147
 148 /* Defines for the MODE SENSE command */
 149 #define MODE_SENSE_CURRENT              0x00
 150 #define MODE_SENSE_CHANGEABLE           0x01
 151 #define MODE_SENSE_DEFAULT              0x02
 152 #define MODE_SENSE_SAVED                0x03
 153
 154 /* IOCTLs used in low-level formatting. */
 155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 157 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 159
 160 /* Error code returned in rq->errors to the higher part of the driver. */
 161 #define IDEFLOPPY_ERROR_GENERAL         101
 162
 163 /*
 164  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 165  * See SFF-8070i spec.
 166  */
 167 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 169
 170 static DEFINE_MUTEX(idefloppy_ref_mutex);
 171
 172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 173
 174 #define ide_floppy_g(disk) \
 175         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 176
 177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 178 {
 179         struct ide_floppy_obj *floppy = NULL;
 180
 181         mutex_lock(&idefloppy_ref_mutex);
 182         floppy = ide_floppy_g(disk);
 183         if (floppy)
 184                 kref_get(&floppy->kref);
 185         mutex_unlock(&idefloppy_ref_mutex);
 186         return floppy;
 187 }
 188
 189 static void idefloppy_cleanup_obj(struct kref *);
 190
 191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 192 {
 193         mutex_lock(&idefloppy_ref_mutex);
 194         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 195         mutex_unlock(&idefloppy_ref_mutex);
 196 }
 197
 198 /*
 199  * Used to finish servicing a request. For read/write requests, we will call
 200  * ide_end_request to pass to the next buffer.
 201  */
 202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 203 {
 204         idefloppy_floppy_t *floppy = drive->driver_data;
 205         struct request *rq = HWGROUP(drive)->rq;
 206         int error;
 207
 208         debug_log("Reached %s\n", __func__);
 209
 210         switch (uptodate) {
 211         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 212         case 1: error = 0; break;
 213         default: error = uptodate;
 214         }
 215         if (error)
 216                 floppy->failed_pc = NULL;
 217         /* Why does this happen? */
 218         if (!rq)
 219                 return 0;
 220         if (!blk_special_request(rq)) {
 221                 /* our real local end request function */
 222                 ide_end_request(drive, uptodate, nsecs);
 223                 return 0;
 224         }
 225         rq->errors = error;
 226         /* fixme: need to move this local also */
 227         ide_end_drive_cmd(drive, 0, 0);
 228         return 0;
 229 }
 230
 231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 232                                   unsigned int bcount, int direction)
 233 {
 234         ide_hwif_t *hwif = drive->hwif;
 235         struct request *rq = pc->rq;
 236         struct req_iterator iter;
 237         struct bio_vec *bvec;
 238         unsigned long flags;
 239         int count, done = 0;
 240         char *data;
 241
 242         rq_for_each_segment(bvec, rq, iter) {
 243                 if (!bcount)
 244                         break;
 245
 246                 count = min(bvec->bv_len, bcount);
 247
 248                 data = bvec_kmap_irq(bvec, &flags);
 249                 if (direction)
 250                         hwif->output_data(drive, NULL, data, count);
 251                 else
 252                         hwif->input_data(drive, NULL, data, count);
 253                 bvec_kunmap_irq(data, &flags);
 254
 255                 bcount -= count;
 256                 pc->b_count += count;
 257                 done += count;
 258         }
 259
 260         idefloppy_end_request(drive, 1, done >> 9);
 261
 262         if (bcount) {
 263                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 264                                 drive->name, __func__, bcount);
 265                 ide_pad_transfer(drive, direction, bcount);
 266         }
 267 }
 268
 269 static void idefloppy_update_buffers(ide_drive_t *drive,
 270                                 struct ide_atapi_pc *pc)
 271 {
 272         struct request *rq = pc->rq;
 273         struct bio *bio = rq->bio;
 274
 275         while ((bio = rq->bio) != NULL)
 276                 idefloppy_end_request(drive, 1, 0);
 277 }
 278
 279 /*
 280  * Generate a new packet command request in front of the request queue, before
 281  * the current request so that it will be processed immediately, on the next
 282  * pass through the driver.
 283  */
 284 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 285                 struct request *rq)
 286 {
 287         struct ide_floppy_obj *floppy = drive->driver_data;
 288
 289         blk_rq_init(NULL, rq);
 290         rq->buffer = (char *) pc;
 291         rq->cmd_type = REQ_TYPE_SPECIAL;
 292         rq->cmd_flags |= REQ_PREEMPT;
 293         rq->rq_disk = floppy->disk;
 294         ide_do_drive_cmd(drive, rq);
 295 }
 296
 297 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 298 {
 299         idefloppy_floppy_t *floppy = drive->driver_data;
 300
 301         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 302                 floppy->pc_stack_index = 0;
 303         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 304 }
 305
 306 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 307 {
 308         idefloppy_floppy_t *floppy = drive->driver_data;
 309
 310         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 311                 floppy->rq_stack_index = 0;
 312         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 313 }
 314
 315 static void ide_floppy_callback(ide_drive_t *drive)
 316 {
 317         idefloppy_floppy_t *floppy = drive->driver_data;
 318         struct ide_atapi_pc *pc = floppy->pc;
 319         int uptodate = pc->error ? 0 : 1;
 320
 321         debug_log("Reached %s\n", __func__);
 322
 323         if (floppy->failed_pc == pc)
 324                 floppy->failed_pc = NULL;
 325
 326         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 327             (pc->rq && blk_pc_request(pc->rq)))
 328                 uptodate = 1; /* FIXME */
 329         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 330                 u8 *buf = floppy->pc->buf;
 331
 332                 if (!pc->error) {
 333                         floppy->sense_key = buf[2] & 0x0F;
 334                         floppy->asc = buf[12];
 335                         floppy->ascq = buf[13];
 336                         floppy->progress_indication = buf[15] & 0x80 ?
 337                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 338
 339                         if (floppy->failed_pc)
 340                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 341
 342                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 343                                   floppy->sense_key, floppy->asc, floppy->ascq);
 344                 } else
 345                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 346                                         "Aborting request!\n");
 347         }
 348
 349         idefloppy_end_request(drive, uptodate, 0);
 350 }
 351
 352 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 353 {
 354         memset(pc->c, 0, 12);
 355         pc->retries = 0;
 356         pc->flags = 0;
 357         pc->req_xfer = 0;
 358         pc->buf = pc->pc_buf;
 359         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 360         pc->callback = ide_floppy_callback;
 361 }
 362
 363 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 364 {
 365         idefloppy_init_pc(pc);
 366         pc->c[0] = GPCMD_REQUEST_SENSE;
 367         pc->c[4] = 255;
 368         pc->req_xfer = 18;
 369 }
 370
 371 /*
 372  * Called when an error was detected during the last packet command. We queue a
 373  * request sense packet command in the head of the request list.
 374  */
 375 static void idefloppy_retry_pc(ide_drive_t *drive)
 376 {
 377         struct ide_atapi_pc *pc;
 378         struct request *rq;
 379
 380         (void)ide_read_error(drive);
 381         pc = idefloppy_next_pc_storage(drive);
 382         rq = idefloppy_next_rq_storage(drive);
 383         idefloppy_create_request_sense_cmd(pc);
 384         idefloppy_queue_pc_head(drive, pc, rq);
 385 }
 386
 387 /* The usual interrupt handler called during a packet command. */
 388 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 389 {
 390         idefloppy_floppy_t *floppy = drive->driver_data;
 391         ide_hwif_t *hwif = drive->hwif;
 392         struct ide_atapi_pc *pc = floppy->pc;
 393         struct request *rq = pc->rq;
 394         xfer_func_t *xferfunc;
 395         unsigned int temp;
 396         int dma_error = 0;
 397         u16 bcount;
 398         u8 stat, ireason;
 399
 400         debug_log("Reached %s interrupt handler\n", __func__);
 401
 402         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 403                 dma_error = hwif->dma_ops->dma_end(drive);
 404                 if (dma_error) {
 405                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 406                                         rq_data_dir(rq) ? "write" : "read");
 407                         pc->flags |= PC_FLAG_DMA_ERROR;
 408                 } else {
 409                         pc->xferred = pc->req_xfer;
 410                         idefloppy_update_buffers(drive, pc);
 411                 }
 412                 debug_log("DMA finished\n");
 413         }
 414
 415         /* Clear the interrupt */
 416         stat = ide_read_status(drive);
 417
 418         /* No more interrupts */
 419         if ((stat & DRQ_STAT) == 0) {
 420                 debug_log("Packet command completed, %d bytes transferred\n",
 421                                 pc->xferred);
 422                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 423
 424                 local_irq_enable_in_hardirq();
 425
 426                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 427                         /* Error detected */
 428                         debug_log("%s: I/O error\n", drive->name);
 429                         rq->errors++;
 430                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 431                                 printk(KERN_ERR "%s: I/O error in request sense"
 432                                                 " command\n", drive->name);
 433                                 return ide_do_reset(drive);
 434                         }
 435                         /* Retry operation */
 436                         idefloppy_retry_pc(drive);
 437                         /* queued, but not started */
 438                         return ide_stopped;
 439                 }
 440                 pc->error = 0;
 441                 /* Command finished - Call the callback function */
 442                 pc->callback(drive);
 443                 return ide_stopped;
 444         }
 445
 446         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 447                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 448                 printk(KERN_ERR "%s: The device wants to issue more interrupts "
 449                                 "in DMA mode\n", drive->name);
 450                 ide_dma_off(drive);
 451                 return ide_do_reset(drive);
 452         }
 453
 454         /* Get the number of bytes to transfer */
 455         bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
 456                   hwif->INB(hwif->io_ports.lbam_addr);
 457         /* on this interrupt */
 458         ireason = hwif->INB(hwif->io_ports.nsect_addr);
 459
 460         if (ireason & CD) {
 461                 printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
 462                 return ide_do_reset(drive);
 463         }
 464         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 465                 /* Hopefully, we will never get here */
 466                 printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
 467                                 "to %s!\n", drive->name,
 468                                 (ireason & IO) ? "Write" : "Read",
 469                                 (ireason & IO) ? "Read" : "Write");
 470                 return ide_do_reset(drive);
 471         }
 472         if (!(pc->flags & PC_FLAG_WRITING)) {
 473                 /* Reading - Check that we have enough space */
 474                 temp = pc->xferred + bcount;
 475                 if (temp > pc->req_xfer) {
 476                         if (temp > pc->buf_size) {
 477                                 printk(KERN_ERR "%s: The device wants to send "
 478                                                 "us more data than expected - "
 479                                                 "discarding data\n",
 480                                                 drive->name);
 481                                 ide_pad_transfer(drive, 0, bcount);
 482
 483                                 ide_set_handler(drive,
 484                                                 &idefloppy_pc_intr,
 485                                                 IDEFLOPPY_WAIT_CMD,
 486                                                 NULL);
 487                                 return ide_started;
 488                         }
 489                         debug_log("The device wants to send us more data than "
 490                                   "expected - allowing transfer\n");
 491                 }
 492         }
 493         if (pc->flags & PC_FLAG_WRITING)
 494                 xferfunc = hwif->output_data;
 495         else
 496                 xferfunc = hwif->input_data;
 497
 498         if (pc->buf)
 499                 xferfunc(drive, NULL, pc->cur_pos, bcount);
 500         else
 501                 ide_floppy_io_buffers(drive, pc, bcount,
 502                                       !!(pc->flags & PC_FLAG_WRITING));
 503
 504         /* Update the current position */
 505         pc->xferred += bcount;
 506         pc->cur_pos += bcount;
 507
 508         /* And set the interrupt handler again */
 509         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 510         return ide_started;
 511 }
 512
 513 /*
 514  * What we have here is a classic case of a top half / bottom half interrupt
 515  * service routine. In interrupt mode, the device sends an interrupt to signal
 516  * that it is ready to receive a packet. However, we need to delay about 2-3
 517  * ticks before issuing the packet or we gets in trouble.
 518  *
 519  * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
 520  * In either case, when the device says it's ready for a packet, we schedule
 521  * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
 522  */
 523 static int idefloppy_transfer_pc2(ide_drive_t *drive)
 524 {
 525         idefloppy_floppy_t *floppy = drive->driver_data;
 526
 527         /* Send the actual packet */
 528         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
 529
 530         /* Timeout for the packet command */
 531         return IDEFLOPPY_WAIT_CMD;
 532 }
 533
 534 static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 535 {
 536         idefloppy_floppy_t *floppy = drive->driver_data;
 537         struct ide_atapi_pc *pc = floppy->pc;
 538         ide_expiry_t *expiry;
 539         unsigned int timeout;
 540
 541         /*
 542          * The following delay solves a problem with ATAPI Zip 100 drives
 543          * where the Busy flag was apparently being deasserted before the
 544          * unit was ready to receive data. This was happening on a
 545          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 546          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 547          * used until after the packet is moved in about 50 msec.
 548          */
 549         if (pc->flags & PC_FLAG_ZIP_DRIVE) {
 550                 timeout = floppy->ticks;
 551                 expiry = &idefloppy_transfer_pc2;
 552         } else {
 553                 timeout = IDEFLOPPY_WAIT_CMD;
 554                 expiry = NULL;
 555         }
 556
 557         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 558 }
 559
 560 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 561                                     struct ide_atapi_pc *pc)
 562 {
 563         /* supress error messages resulting from Medium not present */
 564         if (floppy->sense_key == 0x02 &&
 565             floppy->asc       == 0x3a &&
 566             floppy->ascq      == 0x00)
 567                 return;
 568
 569         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 570                         "asc = %2x, ascq = %2x\n",
 571                         floppy->drive->name, pc->c[0], floppy->sense_key,
 572                         floppy->asc, floppy->ascq);
 573
 574 }
 575
 576 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 577                 struct ide_atapi_pc *pc)
 578 {
 579         idefloppy_floppy_t *floppy = drive->driver_data;
 580
 581         if (floppy->failed_pc == NULL &&
 582             pc->c[0] != GPCMD_REQUEST_SENSE)
 583                 floppy->failed_pc = pc;
 584         /* Set the current packet command */
 585         floppy->pc = pc;
 586
 587         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 588                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 589                         ide_floppy_report_error(floppy, pc);
 590                 /* Giving up */
 591                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 592
 593                 floppy->failed_pc = NULL;
 594                 pc->callback(drive);
 595                 return ide_stopped;
 596         }
 597
 598         debug_log("Retry number - %d\n", pc->retries);
 599
 600         pc->retries++;
 601
 602         return ide_issue_pc(drive, pc, idefloppy_transfer_pc1,
 603                             IDEFLOPPY_WAIT_CMD, NULL);
 604 }
 605
 606 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 607 {
 608         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 609
 610         idefloppy_init_pc(pc);
 611         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 612         pc->c[4] = prevent;
 613 }
 614
 615 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 616 {
 617         idefloppy_init_pc(pc);
 618         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 619         pc->c[7] = 255;
 620         pc->c[8] = 255;
 621         pc->req_xfer = 255;
 622 }
 623
 624 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 625                 int l, int flags)
 626 {
 627         idefloppy_init_pc(pc);
 628         pc->c[0] = GPCMD_FORMAT_UNIT;
 629         pc->c[1] = 0x17;
 630
 631         memset(pc->buf, 0, 12);
 632         pc->buf[1] = 0xA2;
 633         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 634
 635         if (flags & 1)                          /* Verify bit on... */
 636                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 637         pc->buf[3] = 8;
 638
 639         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 640         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 641         pc->buf_size = 12;
 642         pc->flags |= PC_FLAG_WRITING;
 643 }
 644
 645 /* A mode sense command is used to "sense" floppy parameters. */
 646 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 647                 u8 page_code, u8 type)
 648 {
 649         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 650
 651         idefloppy_init_pc(pc);
 652         pc->c[0] = GPCMD_MODE_SENSE_10;
 653         pc->c[1] = 0;
 654         pc->c[2] = page_code + (type << 6);
 655
 656         switch (page_code) {
 657         case IDEFLOPPY_CAPABILITIES_PAGE:
 658                 length += 12;
 659                 break;
 660         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 661                 length += 32;
 662                 break;
 663         default:
 664                 printk(KERN_ERR "ide-floppy: unsupported page code "
 665                                 "in create_mode_sense_cmd\n");
 666         }
 667         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 668         pc->req_xfer = length;
 669 }
 670
 671 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 672 {
 673         idefloppy_init_pc(pc);
 674         pc->c[0] = GPCMD_START_STOP_UNIT;
 675         pc->c[4] = start;
 676 }
 677
 678 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 679 {
 680         idefloppy_init_pc(pc);
 681         pc->c[0] = GPCMD_TEST_UNIT_READY;
 682 }
 683
 684 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 685                                     struct ide_atapi_pc *pc, struct request *rq,
 686                                     unsigned long sector)
 687 {
 688         int block = sector / floppy->bs_factor;
 689         int blocks = rq->nr_sectors / floppy->bs_factor;
 690         int cmd = rq_data_dir(rq);
 691
 692         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 693                 block, blocks);
 694
 695         idefloppy_init_pc(pc);
 696         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 697         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 698         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 699
 700         pc->rq = rq;
 701         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 702         if (rq->cmd_flags & REQ_RW)
 703                 pc->flags |= PC_FLAG_WRITING;
 704         pc->buf = NULL;
 705         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 706         pc->flags |= PC_FLAG_DMA_OK;
 707 }
 708
 709 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 710                 struct ide_atapi_pc *pc, struct request *rq)
 711 {
 712         idefloppy_init_pc(pc);
 713         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 714         pc->rq = rq;
 715         pc->b_count = rq->data_len;
 716         if (rq->data_len && rq_data_dir(rq) == WRITE)
 717                 pc->flags |= PC_FLAG_WRITING;
 718         pc->buf = rq->data;
 719         if (rq->bio)
 720                 pc->flags |= PC_FLAG_DMA_OK;
 721         /*
 722          * possibly problematic, doesn't look like ide-floppy correctly
 723          * handled scattered requests if dma fails...
 724          */
 725         pc->req_xfer = pc->buf_size = rq->data_len;
 726 }
 727
 728 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 729                 struct request *rq, sector_t block_s)
 730 {
 731         idefloppy_floppy_t *floppy = drive->driver_data;
 732         struct ide_atapi_pc *pc;
 733         unsigned long block = (unsigned long)block_s;
 734
 735         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 736                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 737                         rq->cmd_type, rq->errors);
 738         debug_log("sector: %ld, nr_sectors: %ld, "
 739                         "current_nr_sectors: %d\n", (long)rq->sector,
 740                         rq->nr_sectors, rq->current_nr_sectors);
 741
 742         if (rq->errors >= ERROR_MAX) {
 743                 if (floppy->failed_pc)
 744                         ide_floppy_report_error(floppy, floppy->failed_pc);
 745                 else
 746                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 747                                 drive->name);
 748                 idefloppy_end_request(drive, 0, 0);
 749                 return ide_stopped;
 750         }
 751         if (blk_fs_request(rq)) {
 752                 if (((long)rq->sector % floppy->bs_factor) ||
 753                     (rq->nr_sectors % floppy->bs_factor)) {
 754                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 755                                         drive->name);
 756                         idefloppy_end_request(drive, 0, 0);
 757                         return ide_stopped;
 758                 }
 759                 pc = idefloppy_next_pc_storage(drive);
 760                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 761         } else if (blk_special_request(rq)) {
 762                 pc = (struct ide_atapi_pc *) rq->buffer;
 763         } else if (blk_pc_request(rq)) {
 764                 pc = idefloppy_next_pc_storage(drive);
 765                 idefloppy_blockpc_cmd(floppy, pc, rq);
 766         } else {
 767                 blk_dump_rq_flags(rq,
 768                         "ide-floppy: unsupported command in queue");
 769                 idefloppy_end_request(drive, 0, 0);
 770                 return ide_stopped;
 771         }
 772
 773         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT)
 774                 pc->flags |= PC_FLAG_DRQ_INTERRUPT;
 775
 776         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE)
 777                 pc->flags |= PC_FLAG_ZIP_DRIVE;
 778
 779         pc->rq = rq;
 780
 781         return idefloppy_issue_pc(drive, pc);
 782 }
 783
 784 /*
 785  * Add a special packet command request to the tail of the request queue,
 786  * and wait for it to be serviced.
 787  */
 788 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 789 {
 790         struct ide_floppy_obj *floppy = drive->driver_data;
 791         struct request *rq;
 792         int error;
 793
 794         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 795         rq->buffer = (char *) pc;
 796         rq->cmd_type = REQ_TYPE_SPECIAL;
 797         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 798         blk_put_request(rq);
 799
 800         return error;
 801 }
 802
 803 /*
 804  * Look at the flexible disk page parameters. We ignore the CHS capacity
 805  * parameters and use the LBA parameters instead.
 806  */
 807 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 808 {
 809         idefloppy_floppy_t *floppy = drive->driver_data;
 810         struct ide_atapi_pc pc;
 811         u8 *page;
 812         int capacity, lba_capacity;
 813         u16 transfer_rate, sector_size, cyls, rpm;
 814         u8 heads, sectors;
 815
 816         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 817                                         MODE_SENSE_CURRENT);
 818
 819         if (idefloppy_queue_pc_tail(drive, &pc)) {
 820                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 821                                 " parameters\n");
 822                 return 1;
 823         }
 824         floppy->wp = !!(pc.buf[3] & 0x80);
 825         set_disk_ro(floppy->disk, floppy->wp);
 826         page = &pc.buf[8];
 827
 828         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
 829         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
 830         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
 831         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
 832         heads         = pc.buf[8 + 4];
 833         sectors       = pc.buf[8 + 5];
 834
 835         capacity = cyls * heads * sectors * sector_size;
 836
 837         if (memcmp(page, &floppy->flexible_disk_page, 32))
 838                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 839                                 "%d sector size, %d rpm\n",
 840                                 drive->name, capacity / 1024, cyls, heads,
 841                                 sectors, transfer_rate / 8, sector_size, rpm);
 842
 843         memcpy(&floppy->flexible_disk_page, page, 32);
 844         drive->bios_cyl = cyls;
 845         drive->bios_head = heads;
 846         drive->bios_sect = sectors;
 847         lba_capacity = floppy->blocks * floppy->block_size;
 848
 849         if (capacity < lba_capacity) {
 850                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 851                         "bytes, but the drive only handles %d\n",
 852                         drive->name, lba_capacity, capacity);
 853                 floppy->blocks = floppy->block_size ?
 854                         capacity / floppy->block_size : 0;
 855         }
 856         return 0;
 857 }
 858
 859 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 860 {
 861         idefloppy_floppy_t *floppy = drive->driver_data;
 862         struct ide_atapi_pc pc;
 863
 864         floppy->srfp = 0;
 865         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 866                                                  MODE_SENSE_CURRENT);
 867
 868         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 869         if (idefloppy_queue_pc_tail(drive, &pc))
 870                 return 1;
 871
 872         floppy->srfp = pc.buf[8 + 2] & 0x40;
 873         return (0);
 874 }
 875
 876 /*
 877  * Determine if a media is present in the floppy drive, and if so, its LBA
 878  * capacity.
 879  */
 880 static int ide_floppy_get_capacity(ide_drive_t *drive)
 881 {
 882         idefloppy_floppy_t *floppy = drive->driver_data;
 883         struct ide_atapi_pc pc;
 884         u8 *cap_desc;
 885         u8 header_len, desc_cnt;
 886         int i, rc = 1, blocks, length;
 887
 888         drive->bios_cyl = 0;
 889         drive->bios_head = drive->bios_sect = 0;
 890         floppy->blocks = 0;
 891         floppy->bs_factor = 1;
 892         set_capacity(floppy->disk, 0);
 893
 894         idefloppy_create_read_capacity_cmd(&pc);
 895         if (idefloppy_queue_pc_tail(drive, &pc)) {
 896                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 897                 return 1;
 898         }
 899         header_len = pc.buf[3];
 900         cap_desc = &pc.buf[4];
 901         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 902
 903         for (i = 0; i < desc_cnt; i++) {
 904                 unsigned int desc_start = 4 + i*8;
 905
 906                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
 907                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 908
 909                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 910                                 i, blocks * length / 1024, blocks, length);
 911
 912                 if (i)
 913                         continue;
 914                 /*
 915                  * the code below is valid only for the 1st descriptor, ie i=0
 916                  */
 917
 918                 switch (pc.buf[desc_start + 4] & 0x03) {
 919                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 920                 case CAPACITY_UNFORMATTED:
 921                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 922                                 /*
 923                                  * If it is not a clik drive, break out
 924                                  * (maintains previous driver behaviour)
 925                                  */
 926                                 break;
 927                 case CAPACITY_CURRENT:
 928                         /* Normal Zip/LS-120 disks */
 929                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 930                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 931                                         "sector size\n", drive->name,
 932                                         blocks * length / 1024, blocks, length);
 933                         memcpy(&floppy->cap_desc, cap_desc, 8);
 934
 935                         if (!length || length % 512) {
 936                                 printk(KERN_NOTICE "%s: %d bytes block size "
 937                                         "not supported\n", drive->name, length);
 938                         } else {
 939                                 floppy->blocks = blocks;
 940                                 floppy->block_size = length;
 941                                 floppy->bs_factor = length / 512;
 942                                 if (floppy->bs_factor != 1)
 943                                         printk(KERN_NOTICE "%s: warning: non "
 944                                                 "512 bytes block size not "
 945                                                 "fully supported\n",
 946                                                 drive->name);
 947                                 rc = 0;
 948                         }
 949                         break;
 950                 case CAPACITY_NO_CARTRIDGE:
 951                         /*
 952                          * This is a KERN_ERR so it appears on screen
 953                          * for the user to see
 954                          */
 955                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 956                         break;
 957                 case CAPACITY_INVALID:
 958                         printk(KERN_ERR "%s: Invalid capacity for disk "
 959                                 "in drive\n", drive->name);
 960                         break;
 961                 }
 962                 debug_log("Descriptor 0 Code: %d\n",
 963                           pc.buf[desc_start + 4] & 0x03);
 964         }
 965
 966         /* Clik! disk does not support get_flexible_disk_page */
 967         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 968                 (void) ide_floppy_get_flexible_disk_page(drive);
 969
 970         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 971         return rc;
 972 }
 973
 974 /*
 975  * Obtain the list of formattable capacities.
 976  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 977  * descriptors to userland, instead of our own structures.
 978  *
 979  * Userland gives us the following structure:
 980  *
 981  * struct idefloppy_format_capacities {
 982  *      int nformats;
 983  *      struct {
 984  *              int nblocks;
 985  *              int blocksize;
 986  *      } formats[];
 987  * };
 988  *
 989  * userland initializes nformats to the number of allocated formats[] records.
 990  * On exit we set nformats to the number of records we've actually initialized.
 991  */
 992
 993 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 994 {
 995         struct ide_atapi_pc pc;
 996         u8 header_len, desc_cnt;
 997         int i, blocks, length, u_array_size, u_index;
 998         int __user *argp;
 999
1000         if (get_user(u_array_size, arg))
1001                 return (-EFAULT);
1002
1003         if (u_array_size <= 0)
1004                 return (-EINVAL);
1005
1006         idefloppy_create_read_capacity_cmd(&pc);
1007         if (idefloppy_queue_pc_tail(drive, &pc)) {
1008                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1009                 return (-EIO);
1010         }
1011         header_len = pc.buf[3];
1012         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1013
1014         u_index = 0;
1015         argp = arg + 1;
1016
1017         /*
1018          * We always skip the first capacity descriptor.  That's the current
1019          * capacity.  We are interested in the remaining descriptors, the
1020          * formattable capacities.
1021          */
1022         for (i = 1; i < desc_cnt; i++) {
1023                 unsigned int desc_start = 4 + i*8;
1024
1025                 if (u_index >= u_array_size)
1026                         break;  /* User-supplied buffer too small */
1027
1028                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1029                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1030
1031                 if (put_user(blocks, argp))
1032                         return(-EFAULT);
1033                 ++argp;
1034
1035                 if (put_user(length, argp))
1036                         return (-EFAULT);
1037                 ++argp;
1038
1039                 ++u_index;
1040         }
1041
1042         if (put_user(u_index, arg))
1043                 return (-EFAULT);
1044         return (0);
1045 }
1046
1047 /*
1048  * Get ATAPI_FORMAT_UNIT progress indication.
1049  *
1050  * Userland gives a pointer to an int.  The int is set to a progress
1051  * indicator 0-65536, with 65536=100%.
1052  *
1053  * If the drive does not support format progress indication, we just check
1054  * the dsc bit, and return either 0 or 65536.
1055  */
1056
1057 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1058 {
1059         idefloppy_floppy_t *floppy = drive->driver_data;
1060         struct ide_atapi_pc pc;
1061         int progress_indication = 0x10000;
1062
1063         if (floppy->srfp) {
1064                 idefloppy_create_request_sense_cmd(&pc);
1065                 if (idefloppy_queue_pc_tail(drive, &pc))
1066                         return (-EIO);
1067
1068                 if (floppy->sense_key == 2 &&
1069                     floppy->asc == 4 &&
1070                     floppy->ascq == 4)
1071                         progress_indication = floppy->progress_indication;
1072
1073                 /* Else assume format_unit has finished, and we're at 0x10000 */
1074         } else {
1075                 unsigned long flags;
1076                 u8 stat;
1077
1078                 local_irq_save(flags);
1079                 stat = ide_read_status(drive);
1080                 local_irq_restore(flags);
1081
1082                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1083         }
1084         if (put_user(progress_indication, arg))
1085                 return (-EFAULT);
1086
1087         return (0);
1088 }
1089
1090 static sector_t idefloppy_capacity(ide_drive_t *drive)
1091 {
1092         idefloppy_floppy_t *floppy = drive->driver_data;
1093         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1094
1095         return capacity;
1096 }
1097
1098 /*
1099  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1100  * results.
1101  */
1102 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1103 {
1104         u8 gcw[2];
1105         u8 device_type, protocol, removable, drq_type, packet_size;
1106
1107         *((u16 *) &gcw) = id->config;
1108
1109         device_type =  gcw[1] & 0x1F;
1110         removable   = (gcw[0] & 0x80) >> 7;
1111         protocol    = (gcw[1] & 0xC0) >> 6;
1112         drq_type    = (gcw[0] & 0x60) >> 5;
1113         packet_size =  gcw[0] & 0x03;
1114
1115 #ifdef CONFIG_PPC
1116         /* kludge for Apple PowerBook internal zip */
1117         if (device_type == 5 &&
1118             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1119                 device_type = 0;
1120 #endif
1121
1122         if (protocol != 2)
1123                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1124                         protocol);
1125         else if (device_type != 0)
1126                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1127                                 "to floppy\n", device_type);
1128         else if (!removable)
1129                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1130         else if (drq_type == 3)
1131                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1132                                 "supported\n", drq_type);
1133         else if (packet_size != 0)
1134                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1135                                 "bytes\n", packet_size);
1136         else
1137                 return 1;
1138         return 0;
1139 }
1140
1141 #ifdef CONFIG_IDE_PROC_FS
1142 static void idefloppy_add_settings(ide_drive_t *drive)
1143 {
1144         idefloppy_floppy_t *floppy = drive->driver_data;
1145
1146         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1147                         &drive->bios_cyl, NULL);
1148         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1149                         &drive->bios_head, NULL);
1150         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1151                         &drive->bios_sect, NULL);
1152         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1153                         &floppy->ticks,  NULL);
1154 }
1155 #else
1156 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1157 #endif
1158
1159 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1160 {
1161         u8 gcw[2];
1162
1163         *((u16 *) &gcw) = drive->id->config;
1164         floppy->pc = floppy->pc_stack;
1165
1166         if (((gcw[0] & 0x60) >> 5) == 1)
1167                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1168         /*
1169          * We used to check revisions here. At this point however I'm giving up.
1170          * Just assume they are all broken, its easier.
1171          *
1172          * The actual reason for the workarounds was likely a driver bug after
1173          * all rather than a firmware bug, and the workaround below used to hide
1174          * it. It should be fixed as of version 1.9, but to be on the safe side
1175          * we'll leave the limitation below for the 2.2.x tree.
1176          */
1177         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1178                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1179                 /* This value will be visible in the /proc/ide/hdx/settings */
1180                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1181                 blk_queue_max_sectors(drive->queue, 64);
1182         }
1183
1184         /*
1185          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1186          * nasty clicking noises without it, so please don't remove this.
1187          */
1188         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1189                 blk_queue_max_sectors(drive->queue, 64);
1190                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1191         }
1192
1193         (void) ide_floppy_get_capacity(drive);
1194         idefloppy_add_settings(drive);
1195 }
1196
1197 static void ide_floppy_remove(ide_drive_t *drive)
1198 {
1199         idefloppy_floppy_t *floppy = drive->driver_data;
1200         struct gendisk *g = floppy->disk;
1201
1202         ide_proc_unregister_driver(drive, floppy->driver);
1203
1204         del_gendisk(g);
1205
1206         ide_floppy_put(floppy);
1207 }
1208
1209 static void idefloppy_cleanup_obj(struct kref *kref)
1210 {
1211         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1212         ide_drive_t *drive = floppy->drive;
1213         struct gendisk *g = floppy->disk;
1214
1215         drive->driver_data = NULL;
1216         g->private_data = NULL;
1217         put_disk(g);
1218         kfree(floppy);
1219 }
1220
1221 #ifdef CONFIG_IDE_PROC_FS
1222 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1223                 int count, int *eof, void *data)
1224 {
1225         ide_drive_t*drive = (ide_drive_t *)data;
1226         int len;
1227
1228         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1229         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1230 }
1231
1232 static ide_proc_entry_t idefloppy_proc[] = {
1233         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1234         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1235         { NULL, 0, NULL, NULL }
1236 };
1237 #endif  /* CONFIG_IDE_PROC_FS */
1238
1239 static int ide_floppy_probe(ide_drive_t *);
1240
1241 static ide_driver_t idefloppy_driver = {
1242         .gen_driver = {
1243                 .owner          = THIS_MODULE,
1244                 .name           = "ide-floppy",
1245                 .bus            = &ide_bus_type,
1246         },
1247         .probe                  = ide_floppy_probe,
1248         .remove                 = ide_floppy_remove,
1249         .version                = IDEFLOPPY_VERSION,
1250         .media                  = ide_floppy,
1251         .supports_dsc_overlap   = 0,
1252         .do_request             = idefloppy_do_request,
1253         .end_request            = idefloppy_end_request,
1254         .error                  = __ide_error,
1255         .abort                  = __ide_abort,
1256 #ifdef CONFIG_IDE_PROC_FS
1257         .proc                   = idefloppy_proc,
1258 #endif
1259 };
1260
1261 static int idefloppy_open(struct inode *inode, struct file *filp)
1262 {
1263         struct gendisk *disk = inode->i_bdev->bd_disk;
1264         struct ide_floppy_obj *floppy;
1265         ide_drive_t *drive;
1266         struct ide_atapi_pc pc;
1267         int ret = 0;
1268
1269         debug_log("Reached %s\n", __func__);
1270
1271         floppy = ide_floppy_get(disk);
1272         if (!floppy)
1273                 return -ENXIO;
1274
1275         drive = floppy->drive;
1276
1277         floppy->openers++;
1278
1279         if (floppy->openers == 1) {
1280                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1281                 /* Just in case */
1282
1283                 idefloppy_create_test_unit_ready_cmd(&pc);
1284                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1285                         idefloppy_create_start_stop_cmd(&pc, 1);
1286                         (void) idefloppy_queue_pc_tail(drive, &pc);
1287                 }
1288
1289                 if (ide_floppy_get_capacity(drive)
1290                    && (filp->f_flags & O_NDELAY) == 0
1291                     /*
1292                      * Allow O_NDELAY to open a drive without a disk, or with an
1293                      * unreadable disk, so that we can get the format capacity
1294                      * of the drive or begin the format - Sam
1295                      */
1296                     ) {
1297                         ret = -EIO;
1298                         goto out_put_floppy;
1299                 }
1300
1301                 if (floppy->wp && (filp->f_mode & 2)) {
1302                         ret = -EROFS;
1303                         goto out_put_floppy;
1304                 }
1305                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1306                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1307                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1308                         idefloppy_create_prevent_cmd(&pc, 1);
1309                         (void) idefloppy_queue_pc_tail(drive, &pc);
1310                 }
1311                 check_disk_change(inode->i_bdev);
1312         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1313                 ret = -EBUSY;
1314                 goto out_put_floppy;
1315         }
1316         return 0;
1317
1318 out_put_floppy:
1319         floppy->openers--;
1320         ide_floppy_put(floppy);
1321         return ret;
1322 }
1323
1324 static int idefloppy_release(struct inode *inode, struct file *filp)
1325 {
1326         struct gendisk *disk = inode->i_bdev->bd_disk;
1327         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1328         ide_drive_t *drive = floppy->drive;
1329         struct ide_atapi_pc pc;
1330
1331         debug_log("Reached %s\n", __func__);
1332
1333         if (floppy->openers == 1) {
1334                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1335                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1336                         idefloppy_create_prevent_cmd(&pc, 0);
1337                         (void) idefloppy_queue_pc_tail(drive, &pc);
1338                 }
1339
1340                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1341         }
1342
1343         floppy->openers--;
1344
1345         ide_floppy_put(floppy);
1346
1347         return 0;
1348 }
1349
1350 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1351 {
1352         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1353         ide_drive_t *drive = floppy->drive;
1354
1355         geo->heads = drive->bios_head;
1356         geo->sectors = drive->bios_sect;
1357         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1358         return 0;
1359 }
1360
1361 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1362                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1363 {
1364         if (floppy->openers > 1)
1365                 return -EBUSY;
1366
1367         /* The IOMEGA Clik! Drive doesn't support this command -
1368          * no room for an eject mechanism */
1369         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1370                 int prevent = arg ? 1 : 0;
1371
1372                 if (cmd == CDROMEJECT)
1373                         prevent = 0;
1374
1375                 idefloppy_create_prevent_cmd(pc, prevent);
1376                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1377         }
1378
1379         if (cmd == CDROMEJECT) {
1380                 idefloppy_create_start_stop_cmd(pc, 2);
1381                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1382         }
1383
1384         return 0;
1385 }
1386
1387 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1388                                   int __user *arg)
1389 {
1390         int blocks, length, flags, err = 0;
1391         struct ide_atapi_pc pc;
1392
1393         if (floppy->openers > 1) {
1394                 /* Don't format if someone is using the disk */
1395                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1396                 return -EBUSY;
1397         }
1398
1399         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1400
1401         /*
1402          * Send ATAPI_FORMAT_UNIT to the drive.
1403          *
1404          * Userland gives us the following structure:
1405          *
1406          * struct idefloppy_format_command {
1407          *        int nblocks;
1408          *        int blocksize;
1409          *        int flags;
1410          *        } ;
1411          *
1412          * flags is a bitmask, currently, the only defined flag is:
1413          *
1414          *        0x01 - verify media after format.
1415          */
1416         if (get_user(blocks, arg) ||
1417                         get_user(length, arg+1) ||
1418                         get_user(flags, arg+2)) {
1419                 err = -EFAULT;
1420                 goto out;
1421         }
1422
1423         (void) idefloppy_get_sfrp_bit(floppy->drive);
1424         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1425
1426         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1427                 err = -EIO;
1428
1429 out:
1430         if (err)
1431                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1432         return err;
1433 }
1434
1435
1436 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1437                         unsigned int cmd, unsigned long arg)
1438 {
1439         struct block_device *bdev = inode->i_bdev;
1440         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1441         ide_drive_t *drive = floppy->drive;
1442         struct ide_atapi_pc pc;
1443         void __user *argp = (void __user *)arg;
1444         int err;
1445
1446         switch (cmd) {
1447         case CDROMEJECT:
1448                 /* fall through */
1449         case CDROM_LOCKDOOR:
1450                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1451         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1452                 return 0;
1453         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1454                 return ide_floppy_get_format_capacities(drive, argp);
1455         case IDEFLOPPY_IOCTL_FORMAT_START:
1456                 if (!(file->f_mode & 2))
1457                         return -EPERM;
1458
1459                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1460         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1461                 return idefloppy_get_format_progress(drive, argp);
1462         }
1463
1464         /*
1465          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1466          * and CDROM_SEND_PACKET (legacy) ioctls
1467          */
1468         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1469                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1470                                         bdev->bd_disk, cmd, argp);
1471         else
1472                 err = -ENOTTY;
1473
1474         if (err == -ENOTTY)
1475                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1476
1477         return err;
1478 }
1479
1480 static int idefloppy_media_changed(struct gendisk *disk)
1481 {
1482         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1483         ide_drive_t *drive = floppy->drive;
1484         int ret;
1485
1486         /* do not scan partitions twice if this is a removable device */
1487         if (drive->attach) {
1488                 drive->attach = 0;
1489                 return 0;
1490         }
1491         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1492         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1493         return ret;
1494 }
1495
1496 static int idefloppy_revalidate_disk(struct gendisk *disk)
1497 {
1498         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1499         set_capacity(disk, idefloppy_capacity(floppy->drive));
1500         return 0;
1501 }
1502
1503 static struct block_device_operations idefloppy_ops = {
1504         .owner                  = THIS_MODULE,
1505         .open                   = idefloppy_open,
1506         .release                = idefloppy_release,
1507         .ioctl                  = idefloppy_ioctl,
1508         .getgeo                 = idefloppy_getgeo,
1509         .media_changed          = idefloppy_media_changed,
1510         .revalidate_disk        = idefloppy_revalidate_disk
1511 };
1512
1513 static int ide_floppy_probe(ide_drive_t *drive)
1514 {
1515         idefloppy_floppy_t *floppy;
1516         struct gendisk *g;
1517
1518         if (!strstr("ide-floppy", drive->driver_req))
1519                 goto failed;
1520         if (!drive->present)
1521                 goto failed;
1522         if (drive->media != ide_floppy)
1523                 goto failed;
1524         if (!idefloppy_identify_device(drive, drive->id)) {
1525                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1526                                 " of ide-floppy\n", drive->name);
1527                 goto failed;
1528         }
1529         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1530         if (!floppy) {
1531                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1532                                 " structure\n", drive->name);
1533                 goto failed;
1534         }
1535
1536         g = alloc_disk(1 << PARTN_BITS);
1537         if (!g)
1538                 goto out_free_floppy;
1539
1540         ide_init_disk(g, drive);
1541
1542         ide_proc_register_driver(drive, &idefloppy_driver);
1543
1544         kref_init(&floppy->kref);
1545
1546         floppy->drive = drive;
1547         floppy->driver = &idefloppy_driver;
1548         floppy->disk = g;
1549
1550         g->private_data = &floppy->driver;
1551
1552         drive->driver_data = floppy;
1553
1554         idefloppy_setup(drive, floppy);
1555
1556         g->minors = 1 << PARTN_BITS;
1557         g->driverfs_dev = &drive->gendev;
1558         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1559         g->fops = &idefloppy_ops;
1560         drive->attach = 1;
1561         add_disk(g);
1562         return 0;
1563
1564 out_free_floppy:
1565         kfree(floppy);
1566 failed:
1567         return -ENODEV;
1568 }
1569
1570 static void __exit idefloppy_exit(void)
1571 {
1572         driver_unregister(&idefloppy_driver.gen_driver);
1573 }
1574
1575 static int __init idefloppy_init(void)
1576 {
1577         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1578         return driver_register(&idefloppy_driver.gen_driver);
1579 }
1580
1581 MODULE_ALIAS("ide:*m-floppy*");
1582 module_init(idefloppy_init);
1583 module_exit(idefloppy_exit);
1584 MODULE_LICENSE("GPL");
1585 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1586