err.no Git - linux-2.6/blob - 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 (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 324             (pc->rq && blk_pc_request(pc->rq)))
 325                 uptodate = 1; /* FIXME */
 326         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 327                 u8 *buf = floppy->pc->buf;
 328
 329                 if (!pc->error) {
 330                         floppy->sense_key = buf[2] & 0x0F;
 331                         floppy->asc = buf[12];
 332                         floppy->ascq = buf[13];
 333                         floppy->progress_indication = buf[15] & 0x80 ?
 334                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 335
 336                         if (floppy->failed_pc)
 337                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 338
 339                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 340                                   floppy->sense_key, floppy->asc, floppy->ascq);
 341                 } else
 342                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 343                                         "Aborting request!\n");
 344         }
 345
 346         idefloppy_end_request(drive, uptodate, 0);
 347 }
 348
 349 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 350 {
 351         memset(pc->c, 0, 12);
 352         pc->retries = 0;
 353         pc->flags = 0;
 354         pc->req_xfer = 0;
 355         pc->buf = pc->pc_buf;
 356         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 357         pc->callback = ide_floppy_callback;
 358 }
 359
 360 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 361 {
 362         idefloppy_init_pc(pc);
 363         pc->c[0] = GPCMD_REQUEST_SENSE;
 364         pc->c[4] = 255;
 365         pc->req_xfer = 18;
 366 }
 367
 368 /*
 369  * Called when an error was detected during the last packet command. We queue a
 370  * request sense packet command in the head of the request list.
 371  */
 372 static void idefloppy_retry_pc(ide_drive_t *drive)
 373 {
 374         struct ide_atapi_pc *pc;
 375         struct request *rq;
 376
 377         (void)ide_read_error(drive);
 378         pc = idefloppy_next_pc_storage(drive);
 379         rq = idefloppy_next_rq_storage(drive);
 380         idefloppy_create_request_sense_cmd(pc);
 381         idefloppy_queue_pc_head(drive, pc, rq);
 382 }
 383
 384 /* The usual interrupt handler called during a packet command. */
 385 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 386 {
 387         idefloppy_floppy_t *floppy = drive->driver_data;
 388         ide_hwif_t *hwif = drive->hwif;
 389         struct ide_atapi_pc *pc = floppy->pc;
 390         struct request *rq = pc->rq;
 391         xfer_func_t *xferfunc;
 392         unsigned int temp;
 393         int dma_error = 0;
 394         u16 bcount;
 395         u8 stat, ireason;
 396
 397         debug_log("Reached %s interrupt handler\n", __func__);
 398
 399         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 400                 dma_error = hwif->dma_ops->dma_end(drive);
 401                 if (dma_error) {
 402                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 403                                         rq_data_dir(rq) ? "write" : "read");
 404                         pc->flags |= PC_FLAG_DMA_ERROR;
 405                 } else {
 406                         pc->xferred = pc->req_xfer;
 407                         idefloppy_update_buffers(drive, pc);
 408                 }
 409                 debug_log("DMA finished\n");
 410         }
 411
 412         /* Clear the interrupt */
 413         stat = ide_read_status(drive);
 414
 415         /* No more interrupts */
 416         if ((stat & DRQ_STAT) == 0) {
 417                 debug_log("Packet command completed, %d bytes transferred\n",
 418                                 pc->xferred);
 419                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 420
 421                 local_irq_enable_in_hardirq();
 422
 423                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 424                         /* Error detected */
 425                         debug_log("%s: I/O error\n", drive->name);
 426                         rq->errors++;
 427                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 428                                 printk(KERN_ERR "%s: I/O error in request sense"
 429                                                 " command\n", drive->name);
 430                                 return ide_do_reset(drive);
 431                         }
 432                         /* Retry operation */
 433                         idefloppy_retry_pc(drive);
 434                         /* queued, but not started */
 435                         return ide_stopped;
 436                 }
 437                 pc->error = 0;
 438                 if (floppy->failed_pc == pc)
 439                         floppy->failed_pc = NULL;
 440                 /* Command finished - Call the callback function */
 441                 pc->callback(drive);
 442                 return ide_stopped;
 443         }
 444
 445         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 446                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 447                 printk(KERN_ERR "%s: The device wants to issue more interrupts "
 448                                 "in DMA mode\n", drive->name);
 449                 ide_dma_off(drive);
 450                 return ide_do_reset(drive);
 451         }
 452
 453         /* Get the number of bytes to transfer */
 454         bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
 455                   hwif->INB(hwif->io_ports.lbam_addr);
 456         /* on this interrupt */
 457         ireason = hwif->INB(hwif->io_ports.nsect_addr);
 458
 459         if (ireason & CD) {
 460                 printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
 461                 return ide_do_reset(drive);
 462         }
 463         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 464                 /* Hopefully, we will never get here */
 465                 printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
 466                                 "to %s!\n", drive->name,
 467                                 (ireason & IO) ? "Write" : "Read",
 468                                 (ireason & IO) ? "Read" : "Write");
 469                 return ide_do_reset(drive);
 470         }
 471         if (!(pc->flags & PC_FLAG_WRITING)) {
 472                 /* Reading - Check that we have enough space */
 473                 temp = pc->xferred + bcount;
 474                 if (temp > pc->req_xfer) {
 475                         if (temp > pc->buf_size) {
 476                                 printk(KERN_ERR "%s: The device wants to send "
 477                                                 "us more data than expected - "
 478                                                 "discarding data\n",
 479                                                 drive->name);
 480                                 ide_pad_transfer(drive, 0, bcount);
 481
 482                                 ide_set_handler(drive,
 483                                                 &idefloppy_pc_intr,
 484                                                 IDEFLOPPY_WAIT_CMD,
 485                                                 NULL);
 486                                 return ide_started;
 487                         }
 488                         debug_log("The device wants to send us more data than "
 489                                   "expected - allowing transfer\n");
 490                 }
 491         }
 492         if (pc->flags & PC_FLAG_WRITING)
 493                 xferfunc = hwif->output_data;
 494         else
 495                 xferfunc = hwif->input_data;
 496
 497         if (pc->buf)
 498                 xferfunc(drive, NULL, pc->cur_pos, bcount);
 499         else
 500                 ide_floppy_io_buffers(drive, pc, bcount,
 501                                       !!(pc->flags & PC_FLAG_WRITING));
 502
 503         /* Update the current position */
 504         pc->xferred += bcount;
 505         pc->cur_pos += bcount;
 506
 507         /* And set the interrupt handler again */
 508         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 509         return ide_started;
 510 }
 511
 512 /*
 513  * What we have here is a classic case of a top half / bottom half interrupt
 514  * service routine. In interrupt mode, the device sends an interrupt to signal
 515  * that it is ready to receive a packet. However, we need to delay about 2-3
 516  * ticks before issuing the packet or we gets in trouble.
 517  *
 518  * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
 519  * In either case, when the device says it's ready for a packet, we schedule
 520  * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
 521  */
 522 static int idefloppy_transfer_pc2(ide_drive_t *drive)
 523 {
 524         idefloppy_floppy_t *floppy = drive->driver_data;
 525
 526         /* Send the actual packet */
 527         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
 528
 529         /* Timeout for the packet command */
 530         return IDEFLOPPY_WAIT_CMD;
 531 }
 532
 533 static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 534 {
 535         idefloppy_floppy_t *floppy = drive->driver_data;
 536         struct ide_atapi_pc *pc = floppy->pc;
 537         ide_expiry_t *expiry;
 538         unsigned int timeout;
 539
 540         /*
 541          * The following delay solves a problem with ATAPI Zip 100 drives
 542          * where the Busy flag was apparently being deasserted before the
 543          * unit was ready to receive data. This was happening on a
 544          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 545          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 546          * used until after the packet is moved in about 50 msec.
 547          */
 548         if (pc->flags & PC_FLAG_ZIP_DRIVE) {
 549                 timeout = floppy->ticks;
 550                 expiry = &idefloppy_transfer_pc2;
 551         } else {
 552                 timeout = IDEFLOPPY_WAIT_CMD;
 553                 expiry = NULL;
 554         }
 555
 556         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 557 }
 558
 559 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 560                                     struct ide_atapi_pc *pc)
 561 {
 562         /* supress error messages resulting from Medium not present */
 563         if (floppy->sense_key == 0x02 &&
 564             floppy->asc       == 0x3a &&
 565             floppy->ascq      == 0x00)
 566                 return;
 567
 568         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 569                         "asc = %2x, ascq = %2x\n",
 570                         floppy->drive->name, pc->c[0], floppy->sense_key,
 571                         floppy->asc, floppy->ascq);
 572
 573 }
 574
 575 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 576                 struct ide_atapi_pc *pc)
 577 {
 578         idefloppy_floppy_t *floppy = drive->driver_data;
 579
 580         if (floppy->failed_pc == NULL &&
 581             pc->c[0] != GPCMD_REQUEST_SENSE)
 582                 floppy->failed_pc = pc;
 583         /* Set the current packet command */
 584         floppy->pc = pc;
 585
 586         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 587                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 588                         ide_floppy_report_error(floppy, pc);
 589                 /* Giving up */
 590                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 591
 592                 floppy->failed_pc = NULL;
 593                 pc->callback(drive);
 594                 return ide_stopped;
 595         }
 596
 597         debug_log("Retry number - %d\n", pc->retries);
 598
 599         pc->retries++;
 600
 601         return ide_issue_pc(drive, pc, idefloppy_transfer_pc1,
 602                             IDEFLOPPY_WAIT_CMD, NULL);
 603 }
 604
 605 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 606 {
 607         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 608
 609         idefloppy_init_pc(pc);
 610         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 611         pc->c[4] = prevent;
 612 }
 613
 614 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 615 {
 616         idefloppy_init_pc(pc);
 617         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 618         pc->c[7] = 255;
 619         pc->c[8] = 255;
 620         pc->req_xfer = 255;
 621 }
 622
 623 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 624                 int l, int flags)
 625 {
 626         idefloppy_init_pc(pc);
 627         pc->c[0] = GPCMD_FORMAT_UNIT;
 628         pc->c[1] = 0x17;
 629
 630         memset(pc->buf, 0, 12);
 631         pc->buf[1] = 0xA2;
 632         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 633
 634         if (flags & 1)                          /* Verify bit on... */
 635                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 636         pc->buf[3] = 8;
 637
 638         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 639         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 640         pc->buf_size = 12;
 641         pc->flags |= PC_FLAG_WRITING;
 642 }
 643
 644 /* A mode sense command is used to "sense" floppy parameters. */
 645 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 646                 u8 page_code, u8 type)
 647 {
 648         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 649
 650         idefloppy_init_pc(pc);
 651         pc->c[0] = GPCMD_MODE_SENSE_10;
 652         pc->c[1] = 0;
 653         pc->c[2] = page_code + (type << 6);
 654
 655         switch (page_code) {
 656         case IDEFLOPPY_CAPABILITIES_PAGE:
 657                 length += 12;
 658                 break;
 659         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 660                 length += 32;
 661                 break;
 662         default:
 663                 printk(KERN_ERR "ide-floppy: unsupported page code "
 664                                 "in create_mode_sense_cmd\n");
 665         }
 666         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 667         pc->req_xfer = length;
 668 }
 669
 670 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 671 {
 672         idefloppy_init_pc(pc);
 673         pc->c[0] = GPCMD_START_STOP_UNIT;
 674         pc->c[4] = start;
 675 }
 676
 677 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 678 {
 679         idefloppy_init_pc(pc);
 680         pc->c[0] = GPCMD_TEST_UNIT_READY;
 681 }
 682
 683 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 684                                     struct ide_atapi_pc *pc, struct request *rq,
 685                                     unsigned long sector)
 686 {
 687         int block = sector / floppy->bs_factor;
 688         int blocks = rq->nr_sectors / floppy->bs_factor;
 689         int cmd = rq_data_dir(rq);
 690
 691         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 692                 block, blocks);
 693
 694         idefloppy_init_pc(pc);
 695         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 696         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 697         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 698
 699         pc->rq = rq;
 700         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 701         if (rq->cmd_flags & REQ_RW)
 702                 pc->flags |= PC_FLAG_WRITING;
 703         pc->buf = NULL;
 704         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 705         pc->flags |= PC_FLAG_DMA_OK;
 706 }
 707
 708 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 709                 struct ide_atapi_pc *pc, struct request *rq)
 710 {
 711         idefloppy_init_pc(pc);
 712         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 713         pc->rq = rq;
 714         pc->b_count = rq->data_len;
 715         if (rq->data_len && rq_data_dir(rq) == WRITE)
 716                 pc->flags |= PC_FLAG_WRITING;
 717         pc->buf = rq->data;
 718         if (rq->bio)
 719                 pc->flags |= PC_FLAG_DMA_OK;
 720         /*
 721          * possibly problematic, doesn't look like ide-floppy correctly
 722          * handled scattered requests if dma fails...
 723          */
 724         pc->req_xfer = pc->buf_size = rq->data_len;
 725 }
 726
 727 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 728                 struct request *rq, sector_t block_s)
 729 {
 730         idefloppy_floppy_t *floppy = drive->driver_data;
 731         struct ide_atapi_pc *pc;
 732         unsigned long block = (unsigned long)block_s;
 733
 734         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 735                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 736                         rq->cmd_type, rq->errors);
 737         debug_log("sector: %ld, nr_sectors: %ld, "
 738                         "current_nr_sectors: %d\n", (long)rq->sector,
 739                         rq->nr_sectors, rq->current_nr_sectors);
 740
 741         if (rq->errors >= ERROR_MAX) {
 742                 if (floppy->failed_pc)
 743                         ide_floppy_report_error(floppy, floppy->failed_pc);
 744                 else
 745                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 746                                 drive->name);
 747                 idefloppy_end_request(drive, 0, 0);
 748                 return ide_stopped;
 749         }
 750         if (blk_fs_request(rq)) {
 751                 if (((long)rq->sector % floppy->bs_factor) ||
 752                     (rq->nr_sectors % floppy->bs_factor)) {
 753                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 754                                         drive->name);
 755                         idefloppy_end_request(drive, 0, 0);
 756                         return ide_stopped;
 757                 }
 758                 pc = idefloppy_next_pc_storage(drive);
 759                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 760         } else if (blk_special_request(rq)) {
 761                 pc = (struct ide_atapi_pc *) rq->buffer;
 762         } else if (blk_pc_request(rq)) {
 763                 pc = idefloppy_next_pc_storage(drive);
 764                 idefloppy_blockpc_cmd(floppy, pc, rq);
 765         } else {
 766                 blk_dump_rq_flags(rq,
 767                         "ide-floppy: unsupported command in queue");
 768                 idefloppy_end_request(drive, 0, 0);
 769                 return ide_stopped;
 770         }
 771
 772         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT)
 773                 pc->flags |= PC_FLAG_DRQ_INTERRUPT;
 774
 775         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE)
 776                 pc->flags |= PC_FLAG_ZIP_DRIVE;
 777
 778         pc->rq = rq;
 779
 780         return idefloppy_issue_pc(drive, pc);
 781 }
 782
 783 /*
 784  * Add a special packet command request to the tail of the request queue,
 785  * and wait for it to be serviced.
 786  */
 787 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 788 {
 789         struct ide_floppy_obj *floppy = drive->driver_data;
 790         struct request *rq;
 791         int error;
 792
 793         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 794         rq->buffer = (char *) pc;
 795         rq->cmd_type = REQ_TYPE_SPECIAL;
 796         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 797         blk_put_request(rq);
 798
 799         return error;
 800 }
 801
 802 /*
 803  * Look at the flexible disk page parameters. We ignore the CHS capacity
 804  * parameters and use the LBA parameters instead.
 805  */
 806 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 807 {
 808         idefloppy_floppy_t *floppy = drive->driver_data;
 809         struct ide_atapi_pc pc;
 810         u8 *page;
 811         int capacity, lba_capacity;
 812         u16 transfer_rate, sector_size, cyls, rpm;
 813         u8 heads, sectors;
 814
 815         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 816                                         MODE_SENSE_CURRENT);
 817
 818         if (idefloppy_queue_pc_tail(drive, &pc)) {
 819                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 820                                 " parameters\n");
 821                 return 1;
 822         }
 823         floppy->wp = !!(pc.buf[3] & 0x80);
 824         set_disk_ro(floppy->disk, floppy->wp);
 825         page = &pc.buf[8];
 826
 827         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
 828         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
 829         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
 830         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
 831         heads         = pc.buf[8 + 4];
 832         sectors       = pc.buf[8 + 5];
 833
 834         capacity = cyls * heads * sectors * sector_size;
 835
 836         if (memcmp(page, &floppy->flexible_disk_page, 32))
 837                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 838                                 "%d sector size, %d rpm\n",
 839                                 drive->name, capacity / 1024, cyls, heads,
 840                                 sectors, transfer_rate / 8, sector_size, rpm);
 841
 842         memcpy(&floppy->flexible_disk_page, page, 32);
 843         drive->bios_cyl = cyls;
 844         drive->bios_head = heads;
 845         drive->bios_sect = sectors;
 846         lba_capacity = floppy->blocks * floppy->block_size;
 847
 848         if (capacity < lba_capacity) {
 849                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 850                         "bytes, but the drive only handles %d\n",
 851                         drive->name, lba_capacity, capacity);
 852                 floppy->blocks = floppy->block_size ?
 853                         capacity / floppy->block_size : 0;
 854         }
 855         return 0;
 856 }
 857
 858 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 859 {
 860         idefloppy_floppy_t *floppy = drive->driver_data;
 861         struct ide_atapi_pc pc;
 862
 863         floppy->srfp = 0;
 864         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 865                                                  MODE_SENSE_CURRENT);
 866
 867         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 868         if (idefloppy_queue_pc_tail(drive, &pc))
 869                 return 1;
 870
 871         floppy->srfp = pc.buf[8 + 2] & 0x40;
 872         return (0);
 873 }
 874
 875 /*
 876  * Determine if a media is present in the floppy drive, and if so, its LBA
 877  * capacity.
 878  */
 879 static int ide_floppy_get_capacity(ide_drive_t *drive)
 880 {
 881         idefloppy_floppy_t *floppy = drive->driver_data;
 882         struct ide_atapi_pc pc;
 883         u8 *cap_desc;
 884         u8 header_len, desc_cnt;
 885         int i, rc = 1, blocks, length;
 886
 887         drive->bios_cyl = 0;
 888         drive->bios_head = drive->bios_sect = 0;
 889         floppy->blocks = 0;
 890         floppy->bs_factor = 1;
 891         set_capacity(floppy->disk, 0);
 892
 893         idefloppy_create_read_capacity_cmd(&pc);
 894         if (idefloppy_queue_pc_tail(drive, &pc)) {
 895                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 896                 return 1;
 897         }
 898         header_len = pc.buf[3];
 899         cap_desc = &pc.buf[4];
 900         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 901
 902         for (i = 0; i < desc_cnt; i++) {
 903                 unsigned int desc_start = 4 + i*8;
 904
 905                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
 906                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 907
 908                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 909                                 i, blocks * length / 1024, blocks, length);
 910
 911                 if (i)
 912                         continue;
 913                 /*
 914                  * the code below is valid only for the 1st descriptor, ie i=0
 915                  */
 916
 917                 switch (pc.buf[desc_start + 4] & 0x03) {
 918                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 919                 case CAPACITY_UNFORMATTED:
 920                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 921                                 /*
 922                                  * If it is not a clik drive, break out
 923                                  * (maintains previous driver behaviour)
 924                                  */
 925                                 break;
 926                 case CAPACITY_CURRENT:
 927                         /* Normal Zip/LS-120 disks */
 928                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 929                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 930                                         "sector size\n", drive->name,
 931                                         blocks * length / 1024, blocks, length);
 932                         memcpy(&floppy->cap_desc, cap_desc, 8);
 933
 934                         if (!length || length % 512) {
 935                                 printk(KERN_NOTICE "%s: %d bytes block size "
 936                                         "not supported\n", drive->name, length);
 937                         } else {
 938                                 floppy->blocks = blocks;
 939                                 floppy->block_size = length;
 940                                 floppy->bs_factor = length / 512;
 941                                 if (floppy->bs_factor != 1)
 942                                         printk(KERN_NOTICE "%s: warning: non "
 943                                                 "512 bytes block size not "
 944                                                 "fully supported\n",
 945                                                 drive->name);
 946                                 rc = 0;
 947                         }
 948                         break;
 949                 case CAPACITY_NO_CARTRIDGE:
 950                         /*
 951                          * This is a KERN_ERR so it appears on screen
 952                          * for the user to see
 953                          */
 954                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 955                         break;
 956                 case CAPACITY_INVALID:
 957                         printk(KERN_ERR "%s: Invalid capacity for disk "
 958                                 "in drive\n", drive->name);
 959                         break;
 960                 }
 961                 debug_log("Descriptor 0 Code: %d\n",
 962                           pc.buf[desc_start + 4] & 0x03);
 963         }
 964
 965         /* Clik! disk does not support get_flexible_disk_page */
 966         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 967                 (void) ide_floppy_get_flexible_disk_page(drive);
 968
 969         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 970         return rc;
 971 }
 972
 973 /*
 974  * Obtain the list of formattable capacities.
 975  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 976  * descriptors to userland, instead of our own structures.
 977  *
 978  * Userland gives us the following structure:
 979  *
 980  * struct idefloppy_format_capacities {
 981  *      int nformats;
 982  *      struct {
 983  *              int nblocks;
 984  *              int blocksize;
 985  *      } formats[];
 986  * };
 987  *
 988  * userland initializes nformats to the number of allocated formats[] records.
 989  * On exit we set nformats to the number of records we've actually initialized.
 990  */
 991
 992 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 993 {
 994         struct ide_atapi_pc pc;
 995         u8 header_len, desc_cnt;
 996         int i, blocks, length, u_array_size, u_index;
 997         int __user *argp;
 998
 999         if (get_user(u_array_size, arg))
1000                 return (-EFAULT);
1001
1002         if (u_array_size <= 0)
1003                 return (-EINVAL);
1004
1005         idefloppy_create_read_capacity_cmd(&pc);
1006         if (idefloppy_queue_pc_tail(drive, &pc)) {
1007                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1008                 return (-EIO);
1009         }
1010         header_len = pc.buf[3];
1011         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1012
1013         u_index = 0;
1014         argp = arg + 1;
1015
1016         /*
1017          * We always skip the first capacity descriptor.  That's the current
1018          * capacity.  We are interested in the remaining descriptors, the
1019          * formattable capacities.
1020          */
1021         for (i = 1; i < desc_cnt; i++) {
1022                 unsigned int desc_start = 4 + i*8;
1023
1024                 if (u_index >= u_array_size)
1025                         break;  /* User-supplied buffer too small */
1026
1027                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1028                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1029
1030                 if (put_user(blocks, argp))
1031                         return(-EFAULT);
1032                 ++argp;
1033
1034                 if (put_user(length, argp))
1035                         return (-EFAULT);
1036                 ++argp;
1037
1038                 ++u_index;
1039         }
1040
1041         if (put_user(u_index, arg))
1042                 return (-EFAULT);
1043         return (0);
1044 }
1045
1046 /*
1047  * Get ATAPI_FORMAT_UNIT progress indication.
1048  *
1049  * Userland gives a pointer to an int.  The int is set to a progress
1050  * indicator 0-65536, with 65536=100%.
1051  *
1052  * If the drive does not support format progress indication, we just check
1053  * the dsc bit, and return either 0 or 65536.
1054  */
1055
1056 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1057 {
1058         idefloppy_floppy_t *floppy = drive->driver_data;
1059         struct ide_atapi_pc pc;
1060         int progress_indication = 0x10000;
1061
1062         if (floppy->srfp) {
1063                 idefloppy_create_request_sense_cmd(&pc);
1064                 if (idefloppy_queue_pc_tail(drive, &pc))
1065                         return (-EIO);
1066
1067                 if (floppy->sense_key == 2 &&
1068                     floppy->asc == 4 &&
1069                     floppy->ascq == 4)
1070                         progress_indication = floppy->progress_indication;
1071
1072                 /* Else assume format_unit has finished, and we're at 0x10000 */
1073         } else {
1074                 unsigned long flags;
1075                 u8 stat;
1076
1077                 local_irq_save(flags);
1078                 stat = ide_read_status(drive);
1079                 local_irq_restore(flags);
1080
1081                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1082         }
1083         if (put_user(progress_indication, arg))
1084                 return (-EFAULT);
1085
1086         return (0);
1087 }
1088
1089 static sector_t idefloppy_capacity(ide_drive_t *drive)
1090 {
1091         idefloppy_floppy_t *floppy = drive->driver_data;
1092         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1093
1094         return capacity;
1095 }
1096
1097 /*
1098  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1099  * results.
1100  */
1101 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1102 {
1103         u8 gcw[2];
1104         u8 device_type, protocol, removable, drq_type, packet_size;
1105
1106         *((u16 *) &gcw) = id->config;
1107
1108         device_type =  gcw[1] & 0x1F;
1109         removable   = (gcw[0] & 0x80) >> 7;
1110         protocol    = (gcw[1] & 0xC0) >> 6;
1111         drq_type    = (gcw[0] & 0x60) >> 5;
1112         packet_size =  gcw[0] & 0x03;
1113
1114 #ifdef CONFIG_PPC
1115         /* kludge for Apple PowerBook internal zip */
1116         if (device_type == 5 &&
1117             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1118                 device_type = 0;
1119 #endif
1120
1121         if (protocol != 2)
1122                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1123                         protocol);
1124         else if (device_type != 0)
1125                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1126                                 "to floppy\n", device_type);
1127         else if (!removable)
1128                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1129         else if (drq_type == 3)
1130                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1131                                 "supported\n", drq_type);
1132         else if (packet_size != 0)
1133                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1134                                 "bytes\n", packet_size);
1135         else
1136                 return 1;
1137         return 0;
1138 }
1139
1140 #ifdef CONFIG_IDE_PROC_FS
1141 static void idefloppy_add_settings(ide_drive_t *drive)
1142 {
1143         idefloppy_floppy_t *floppy = drive->driver_data;
1144
1145         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1146                         &drive->bios_cyl, NULL);
1147         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1148                         &drive->bios_head, NULL);
1149         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1150                         &drive->bios_sect, NULL);
1151         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1152                         &floppy->ticks,  NULL);
1153 }
1154 #else
1155 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1156 #endif
1157
1158 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1159 {
1160         u8 gcw[2];
1161
1162         *((u16 *) &gcw) = drive->id->config;
1163         floppy->pc = floppy->pc_stack;
1164
1165         if (((gcw[0] & 0x60) >> 5) == 1)
1166                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1167         /*
1168          * We used to check revisions here. At this point however I'm giving up.
1169          * Just assume they are all broken, its easier.
1170          *
1171          * The actual reason for the workarounds was likely a driver bug after
1172          * all rather than a firmware bug, and the workaround below used to hide
1173          * it. It should be fixed as of version 1.9, but to be on the safe side
1174          * we'll leave the limitation below for the 2.2.x tree.
1175          */
1176         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1177                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1178                 /* This value will be visible in the /proc/ide/hdx/settings */
1179                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1180                 blk_queue_max_sectors(drive->queue, 64);
1181         }
1182
1183         /*
1184          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1185          * nasty clicking noises without it, so please don't remove this.
1186          */
1187         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1188                 blk_queue_max_sectors(drive->queue, 64);
1189                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1190         }
1191
1192         (void) ide_floppy_get_capacity(drive);
1193         idefloppy_add_settings(drive);
1194 }
1195
1196 static void ide_floppy_remove(ide_drive_t *drive)
1197 {
1198         idefloppy_floppy_t *floppy = drive->driver_data;
1199         struct gendisk *g = floppy->disk;
1200
1201         ide_proc_unregister_driver(drive, floppy->driver);
1202
1203         del_gendisk(g);
1204
1205         ide_floppy_put(floppy);
1206 }
1207
1208 static void idefloppy_cleanup_obj(struct kref *kref)
1209 {
1210         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1211         ide_drive_t *drive = floppy->drive;
1212         struct gendisk *g = floppy->disk;
1213
1214         drive->driver_data = NULL;
1215         g->private_data = NULL;
1216         put_disk(g);
1217         kfree(floppy);
1218 }
1219
1220 #ifdef CONFIG_IDE_PROC_FS
1221 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1222                 int count, int *eof, void *data)
1223 {
1224         ide_drive_t*drive = (ide_drive_t *)data;
1225         int len;
1226
1227         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1228         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1229 }
1230
1231 static ide_proc_entry_t idefloppy_proc[] = {
1232         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1233         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1234         { NULL, 0, NULL, NULL }
1235 };
1236 #endif  /* CONFIG_IDE_PROC_FS */
1237
1238 static int ide_floppy_probe(ide_drive_t *);
1239
1240 static ide_driver_t idefloppy_driver = {
1241         .gen_driver = {
1242                 .owner          = THIS_MODULE,
1243                 .name           = "ide-floppy",
1244                 .bus            = &ide_bus_type,
1245         },
1246         .probe                  = ide_floppy_probe,
1247         .remove                 = ide_floppy_remove,
1248         .version                = IDEFLOPPY_VERSION,
1249         .media                  = ide_floppy,
1250         .supports_dsc_overlap   = 0,
1251         .do_request             = idefloppy_do_request,
1252         .end_request            = idefloppy_end_request,
1253         .error                  = __ide_error,
1254         .abort                  = __ide_abort,
1255 #ifdef CONFIG_IDE_PROC_FS
1256         .proc                   = idefloppy_proc,
1257 #endif
1258 };
1259
1260 static int idefloppy_open(struct inode *inode, struct file *filp)
1261 {
1262         struct gendisk *disk = inode->i_bdev->bd_disk;
1263         struct ide_floppy_obj *floppy;
1264         ide_drive_t *drive;
1265         struct ide_atapi_pc pc;
1266         int ret = 0;
1267
1268         debug_log("Reached %s\n", __func__);
1269
1270         floppy = ide_floppy_get(disk);
1271         if (!floppy)
1272                 return -ENXIO;
1273
1274         drive = floppy->drive;
1275
1276         floppy->openers++;
1277
1278         if (floppy->openers == 1) {
1279                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1280                 /* Just in case */
1281
1282                 idefloppy_create_test_unit_ready_cmd(&pc);
1283                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1284                         idefloppy_create_start_stop_cmd(&pc, 1);
1285                         (void) idefloppy_queue_pc_tail(drive, &pc);
1286                 }
1287
1288                 if (ide_floppy_get_capacity(drive)
1289                    && (filp->f_flags & O_NDELAY) == 0
1290                     /*
1291                      * Allow O_NDELAY to open a drive without a disk, or with an
1292                      * unreadable disk, so that we can get the format capacity
1293                      * of the drive or begin the format - Sam
1294                      */
1295                     ) {
1296                         ret = -EIO;
1297                         goto out_put_floppy;
1298                 }
1299
1300                 if (floppy->wp && (filp->f_mode & 2)) {
1301                         ret = -EROFS;
1302                         goto out_put_floppy;
1303                 }
1304                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1305                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1306                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1307                         idefloppy_create_prevent_cmd(&pc, 1);
1308                         (void) idefloppy_queue_pc_tail(drive, &pc);
1309                 }
1310                 check_disk_change(inode->i_bdev);
1311         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1312                 ret = -EBUSY;
1313                 goto out_put_floppy;
1314         }
1315         return 0;
1316
1317 out_put_floppy:
1318         floppy->openers--;
1319         ide_floppy_put(floppy);
1320         return ret;
1321 }
1322
1323 static int idefloppy_release(struct inode *inode, struct file *filp)
1324 {
1325         struct gendisk *disk = inode->i_bdev->bd_disk;
1326         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1327         ide_drive_t *drive = floppy->drive;
1328         struct ide_atapi_pc pc;
1329
1330         debug_log("Reached %s\n", __func__);
1331
1332         if (floppy->openers == 1) {
1333                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1334                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1335                         idefloppy_create_prevent_cmd(&pc, 0);
1336                         (void) idefloppy_queue_pc_tail(drive, &pc);
1337                 }
1338
1339                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1340         }
1341
1342         floppy->openers--;
1343
1344         ide_floppy_put(floppy);
1345
1346         return 0;
1347 }
1348
1349 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1350 {
1351         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1352         ide_drive_t *drive = floppy->drive;
1353
1354         geo->heads = drive->bios_head;
1355         geo->sectors = drive->bios_sect;
1356         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1357         return 0;
1358 }
1359
1360 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1361                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1362 {
1363         if (floppy->openers > 1)
1364                 return -EBUSY;
1365
1366         /* The IOMEGA Clik! Drive doesn't support this command -
1367          * no room for an eject mechanism */
1368         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1369                 int prevent = arg ? 1 : 0;
1370
1371                 if (cmd == CDROMEJECT)
1372                         prevent = 0;
1373
1374                 idefloppy_create_prevent_cmd(pc, prevent);
1375                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1376         }
1377
1378         if (cmd == CDROMEJECT) {
1379                 idefloppy_create_start_stop_cmd(pc, 2);
1380                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1381         }
1382
1383         return 0;
1384 }
1385
1386 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1387                                   int __user *arg)
1388 {
1389         int blocks, length, flags, err = 0;
1390         struct ide_atapi_pc pc;
1391
1392         if (floppy->openers > 1) {
1393                 /* Don't format if someone is using the disk */
1394                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1395                 return -EBUSY;
1396         }
1397
1398         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1399
1400         /*
1401          * Send ATAPI_FORMAT_UNIT to the drive.
1402          *
1403          * Userland gives us the following structure:
1404          *
1405          * struct idefloppy_format_command {
1406          *        int nblocks;
1407          *        int blocksize;
1408          *        int flags;
1409          *        } ;
1410          *
1411          * flags is a bitmask, currently, the only defined flag is:
1412          *
1413          *        0x01 - verify media after format.
1414          */
1415         if (get_user(blocks, arg) ||
1416                         get_user(length, arg+1) ||
1417                         get_user(flags, arg+2)) {
1418                 err = -EFAULT;
1419                 goto out;
1420         }
1421
1422         (void) idefloppy_get_sfrp_bit(floppy->drive);
1423         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1424
1425         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1426                 err = -EIO;
1427
1428 out:
1429         if (err)
1430                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1431         return err;
1432 }
1433
1434
1435 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1436                         unsigned int cmd, unsigned long arg)
1437 {
1438         struct block_device *bdev = inode->i_bdev;
1439         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1440         ide_drive_t *drive = floppy->drive;
1441         struct ide_atapi_pc pc;
1442         void __user *argp = (void __user *)arg;
1443         int err;
1444
1445         switch (cmd) {
1446         case CDROMEJECT:
1447                 /* fall through */
1448         case CDROM_LOCKDOOR:
1449                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1450         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1451                 return 0;
1452         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1453                 return ide_floppy_get_format_capacities(drive, argp);
1454         case IDEFLOPPY_IOCTL_FORMAT_START:
1455                 if (!(file->f_mode & 2))
1456                         return -EPERM;
1457
1458                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1459         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1460                 return idefloppy_get_format_progress(drive, argp);
1461         }
1462
1463         /*
1464          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1465          * and CDROM_SEND_PACKET (legacy) ioctls
1466          */
1467         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1468                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1469                                         bdev->bd_disk, cmd, argp);
1470         else
1471                 err = -ENOTTY;
1472
1473         if (err == -ENOTTY)
1474                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1475
1476         return err;
1477 }
1478
1479 static int idefloppy_media_changed(struct gendisk *disk)
1480 {
1481         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1482         ide_drive_t *drive = floppy->drive;
1483         int ret;
1484
1485         /* do not scan partitions twice if this is a removable device */
1486         if (drive->attach) {
1487                 drive->attach = 0;
1488                 return 0;
1489         }
1490         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1491         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1492         return ret;
1493 }
1494
1495 static int idefloppy_revalidate_disk(struct gendisk *disk)
1496 {
1497         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1498         set_capacity(disk, idefloppy_capacity(floppy->drive));
1499         return 0;
1500 }
1501
1502 static struct block_device_operations idefloppy_ops = {
1503         .owner                  = THIS_MODULE,
1504         .open                   = idefloppy_open,
1505         .release                = idefloppy_release,
1506         .ioctl                  = idefloppy_ioctl,
1507         .getgeo                 = idefloppy_getgeo,
1508         .media_changed          = idefloppy_media_changed,
1509         .revalidate_disk        = idefloppy_revalidate_disk
1510 };
1511
1512 static int ide_floppy_probe(ide_drive_t *drive)
1513 {
1514         idefloppy_floppy_t *floppy;
1515         struct gendisk *g;
1516
1517         if (!strstr("ide-floppy", drive->driver_req))
1518                 goto failed;
1519         if (!drive->present)
1520                 goto failed;
1521         if (drive->media != ide_floppy)
1522                 goto failed;
1523         if (!idefloppy_identify_device(drive, drive->id)) {
1524                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1525                                 " of ide-floppy\n", drive->name);
1526                 goto failed;
1527         }
1528         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1529         if (!floppy) {
1530                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1531                                 " structure\n", drive->name);
1532                 goto failed;
1533         }
1534
1535         g = alloc_disk(1 << PARTN_BITS);
1536         if (!g)
1537                 goto out_free_floppy;
1538
1539         ide_init_disk(g, drive);
1540
1541         ide_proc_register_driver(drive, &idefloppy_driver);
1542
1543         kref_init(&floppy->kref);
1544
1545         floppy->drive = drive;
1546         floppy->driver = &idefloppy_driver;
1547         floppy->disk = g;
1548
1549         g->private_data = &floppy->driver;
1550
1551         drive->driver_data = floppy;
1552
1553         idefloppy_setup(drive, floppy);
1554
1555         g->minors = 1 << PARTN_BITS;
1556         g->driverfs_dev = &drive->gendev;
1557         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1558         g->fops = &idefloppy_ops;
1559         drive->attach = 1;
1560         add_disk(g);
1561         return 0;
1562
1563 out_free_floppy:
1564         kfree(floppy);
1565 failed:
1566         return -ENODEV;
1567 }
1568
1569 static void __exit idefloppy_exit(void)
1570 {
1571         driver_unregister(&idefloppy_driver.gen_driver);
1572 }
1573
1574 static int __init idefloppy_init(void)
1575 {
1576         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1577         return driver_register(&idefloppy_driver.gen_driver);
1578 }
1579
1580 MODULE_ALIAS("ide:*m-floppy*");
1581 module_init(idefloppy_init);
1582 module_exit(idefloppy_exit);
1583 MODULE_LICENSE("GPL");
1584 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1585