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
   9 /*
  10  * The driver currently doesn't have any fancy features, just the bare
  11  * minimum read/write support.
  12  *
  13  * This driver supports the following IDE floppy drives:
  14  *
  15  * LS-120/240 SuperDisk
  16  * Iomega Zip 100/250
  17  * Iomega PC Card Clik!/PocketZip
  18  *
  19  * For a historical changelog see
  20  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  21  */
  22
  23 #define IDEFLOPPY_VERSION "0.99.newide"
  24
  25 #include <linux/module.h>
  26 #include <linux/types.h>
  27 #include <linux/string.h>
  28 #include <linux/kernel.h>
  29 #include <linux/delay.h>
  30 #include <linux/timer.h>
  31 #include <linux/mm.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/major.h>
  34 #include <linux/errno.h>
  35 #include <linux/genhd.h>
  36 #include <linux/slab.h>
  37 #include <linux/cdrom.h>
  38 #include <linux/ide.h>
  39 #include <linux/bitops.h>
  40 #include <linux/mutex.h>
  41
  42 #include <scsi/scsi_ioctl.h>
  43
  44 #include <asm/byteorder.h>
  45 #include <linux/irq.h>
  46 #include <linux/uaccess.h>
  47 #include <linux/io.h>
  48 #include <asm/unaligned.h>
  49
  50 /* define to see debug info */
  51 #define IDEFLOPPY_DEBUG_LOG             0
  52
  53 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  54 #define IDEFLOPPY_DEBUG( fmt, args... )
  55
  56 #if IDEFLOPPY_DEBUG_LOG
  57 #define debug_log(fmt, args...) \
  58         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  59 #else
  60 #define debug_log(fmt, args... ) do {} while(0)
  61 #endif
  62
  63
  64 /*
  65  *      Some drives require a longer irq timeout.
  66  */
  67 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  68
  69 /*
  70  *      After each failed packet command we issue a request sense command
  71  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  72  */
  73 #define IDEFLOPPY_MAX_PC_RETRIES        3
  74
  75 /*
  76  *      With each packet command, we allocate a buffer of
  77  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
  78  */
  79 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  80
  81 /*
  82  *      In various places in the driver, we need to allocate storage
  83  *      for packet commands and requests, which will remain valid while
  84  *      we leave the driver to wait for an interrupt or a timeout event.
  85  */
  86 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  87
  88 /*
  89  *      Our view of a packet command.
  90  */
  91 typedef struct idefloppy_packet_command_s {
  92         u8 c[12];                               /* Actual packet bytes */
  93         int retries;                            /* On each retry, we increment retries */
  94         int error;                              /* Error code */
  95         int request_transfer;                   /* Bytes to transfer */
  96         int actually_transferred;               /* Bytes actually transferred */
  97         int buffer_size;                        /* Size of our data buffer */
  98         int b_count;                            /* Missing/Available data on the current buffer */
  99         struct request *rq;                     /* The corresponding request */
 100         u8 *buffer;                             /* Data buffer */
 101         u8 *current_position;                   /* Pointer into the above buffer */
 102         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
 103         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
 104         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
 105 } idefloppy_pc_t;
 106
 107 /* Packet command flag bits. */
 108 enum {
 109         /* 1 when we prefer to use DMA if possible */
 110         PC_FLAG_DMA_RECOMMENDED = (1 << 0),
 111         /* 1 while DMA in progress */
 112         PC_FLAG_DMA_IN_PROGRESS = (1 << 1),
 113         /* 1 when encountered problem during DMA */
 114         PC_FLAG_DMA_ERROR       = (1 << 2),
 115         /* Data direction */
 116         PC_FLAG_WRITING         = (1 << 3),
 117         /* Suppress error reporting */
 118         PC_FLAG_SUPPRESS_ERROR  = (1 << 4),
 119 };
 120
 121 /* format capacities descriptor codes */
 122 #define CAPACITY_INVALID        0x00
 123 #define CAPACITY_UNFORMATTED    0x01
 124 #define CAPACITY_CURRENT        0x02
 125 #define CAPACITY_NO_CARTRIDGE   0x03
 126
 127 /*
 128  *      Most of our global data which we need to save even as we leave the
 129  *      driver due to an interrupt or a timer event is stored in a variable
 130  *      of type idefloppy_floppy_t, defined below.
 131  */
 132 typedef struct ide_floppy_obj {
 133         ide_drive_t     *drive;
 134         ide_driver_t    *driver;
 135         struct gendisk  *disk;
 136         struct kref     kref;
 137         unsigned int    openers;        /* protected by BKL for now */
 138
 139         /* Current packet command */
 140         idefloppy_pc_t *pc;
 141         /* Last failed packet command */
 142         idefloppy_pc_t *failed_pc;
 143         /* Packet command stack */
 144         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
 145         /* Next free packet command storage space */
 146         int pc_stack_index;
 147         struct request rq_stack[IDEFLOPPY_PC_STACK];
 148         /* We implement a circular array */
 149         int rq_stack_index;
 150
 151         /*
 152          *      Last error information
 153          */
 154         u8 sense_key, asc, ascq;
 155         /* delay this long before sending packet command */
 156         u8 ticks;
 157         int progress_indication;
 158
 159         /*
 160          *      Device information
 161          */
 162         /* Current format */
 163         int blocks, block_size, bs_factor;
 164         /* Last format capacity descriptor */
 165         u8 cap_desc[8];
 166         /* Copy of the flexible disk page */
 167         u8 flexible_disk_page[32];
 168         /* Write protect */
 169         int wp;
 170         /* Supports format progress report */
 171         int srfp;
 172         /* Status/Action flags */
 173         unsigned long flags;
 174 } idefloppy_floppy_t;
 175
 176 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 177
 178 /* Floppy flag bits values. */
 179 enum {
 180         /* DRQ interrupt device */
 181         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
 182         /* Media may have changed */
 183         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
 184         /* Format in progress */
 185         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
 186         /* Avoid commands not supported in Clik drive */
 187         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
 188         /* Requires BH algorithm for packets */
 189         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
 190 };
 191
 192 /*
 193  *      Defines for the mode sense command
 194  */
 195 #define MODE_SENSE_CURRENT              0x00
 196 #define MODE_SENSE_CHANGEABLE           0x01
 197 #define MODE_SENSE_DEFAULT              0x02
 198 #define MODE_SENSE_SAVED                0x03
 199
 200 /*
 201  *      IOCTLs used in low-level formatting.
 202  */
 203
 204 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 205 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 206 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 207 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 208
 209 /*
 210  *      Error codes which are returned in rq->errors to the higher part
 211  *      of the driver.
 212  */
 213 #define IDEFLOPPY_ERROR_GENERAL         101
 214
 215 /*
 216  *      The following is used to format the general configuration word of
 217  *      the ATAPI IDENTIFY DEVICE command.
 218  */
 219 struct idefloppy_id_gcw {
 220 #if defined(__LITTLE_ENDIAN_BITFIELD)
 221         unsigned packet_size            :2;     /* Packet Size */
 222         unsigned reserved234            :3;     /* Reserved */
 223         unsigned drq_type               :2;     /* Command packet DRQ type */
 224         unsigned removable              :1;     /* Removable media */
 225         unsigned device_type            :5;     /* Device type */
 226         unsigned reserved13             :1;     /* Reserved */
 227         unsigned protocol               :2;     /* Protocol type */
 228 #elif defined(__BIG_ENDIAN_BITFIELD)
 229         unsigned protocol               :2;     /* Protocol type */
 230         unsigned reserved13             :1;     /* Reserved */
 231         unsigned device_type            :5;     /* Device type */
 232         unsigned removable              :1;     /* Removable media */
 233         unsigned drq_type               :2;     /* Command packet DRQ type */
 234         unsigned reserved234            :3;     /* Reserved */
 235         unsigned packet_size            :2;     /* Packet Size */
 236 #else
 237 #error "Bitfield endianness not defined! Check your byteorder.h"
 238 #endif
 239 };
 240
 241 /*
 242  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 243  * See SFF-8070i spec.
 244  */
 245 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 246 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 247
 248 static DEFINE_MUTEX(idefloppy_ref_mutex);
 249
 250 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 251
 252 #define ide_floppy_g(disk) \
 253         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 254
 255 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 256 {
 257         struct ide_floppy_obj *floppy = NULL;
 258
 259         mutex_lock(&idefloppy_ref_mutex);
 260         floppy = ide_floppy_g(disk);
 261         if (floppy)
 262                 kref_get(&floppy->kref);
 263         mutex_unlock(&idefloppy_ref_mutex);
 264         return floppy;
 265 }
 266
 267 static void idefloppy_cleanup_obj(struct kref *);
 268
 269 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 270 {
 271         mutex_lock(&idefloppy_ref_mutex);
 272         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 273         mutex_unlock(&idefloppy_ref_mutex);
 274 }
 275
 276 /*
 277  *      Too bad. The drive wants to send us data which we are not ready to accept.
 278  *      Just throw it away.
 279  */
 280 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
 281 {
 282         while (bcount--)
 283                 (void) HWIF(drive)->INB(IDE_DATA_REG);
 284 }
 285
 286 static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
 287 {
 288         while (bcount--)
 289                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
 290 }
 291
 292
 293 /*
 294  *      idefloppy_do_end_request is used to finish servicing a request.
 295  *
 296  *      For read/write requests, we will call ide_end_request to pass to the
 297  *      next buffer.
 298  */
 299 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 300 {
 301         idefloppy_floppy_t *floppy = drive->driver_data;
 302         struct request *rq = HWGROUP(drive)->rq;
 303         int error;
 304
 305         debug_log("Reached %s\n", __func__);
 306
 307         switch (uptodate) {
 308                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 309                 case 1: error = 0; break;
 310                 default: error = uptodate;
 311         }
 312         if (error)
 313                 floppy->failed_pc = NULL;
 314         /* Why does this happen? */
 315         if (!rq)
 316                 return 0;
 317         if (!blk_special_request(rq)) {
 318                 /* our real local end request function */
 319                 ide_end_request(drive, uptodate, nsecs);
 320                 return 0;
 321         }
 322         rq->errors = error;
 323         /* fixme: need to move this local also */
 324         ide_end_drive_cmd(drive, 0, 0);
 325         return 0;
 326 }
 327
 328 static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
 329                                   unsigned int bcount, int direction)
 330 {
 331         struct request *rq = pc->rq;
 332         struct req_iterator iter;
 333         struct bio_vec *bvec;
 334         unsigned long flags;
 335         int count, done = 0;
 336         char *data;
 337
 338         rq_for_each_segment(bvec, rq, iter) {
 339                 if (!bcount)
 340                         break;
 341
 342                 count = min(bvec->bv_len, bcount);
 343
 344                 data = bvec_kmap_irq(bvec, &flags);
 345                 if (direction)
 346                         drive->hwif->atapi_output_bytes(drive, data, count);
 347                 else
 348                         drive->hwif->atapi_input_bytes(drive, data, count);
 349                 bvec_kunmap_irq(data, &flags);
 350
 351                 bcount -= count;
 352                 pc->b_count += count;
 353                 done += count;
 354         }
 355
 356         idefloppy_do_end_request(drive, 1, done >> 9);
 357
 358         if (bcount) {
 359                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 360                                 drive->name, __func__, bcount);
 361                 if (direction)
 362                         idefloppy_write_zeros(drive, bcount);
 363                 else
 364                         idefloppy_discard_data(drive, bcount);
 365
 366         }
 367 }
 368
 369 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 370 {
 371         struct request *rq = pc->rq;
 372         struct bio *bio = rq->bio;
 373
 374         while ((bio = rq->bio) != NULL)
 375                 idefloppy_do_end_request(drive, 1, 0);
 376 }
 377
 378 /*
 379  *      idefloppy_queue_pc_head generates a new packet command request in front
 380  *      of the request queue, before the current request, so that it will be
 381  *      processed immediately, on the next pass through the driver.
 382  */
 383 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
 384 {
 385         struct ide_floppy_obj *floppy = drive->driver_data;
 386
 387         ide_init_drive_cmd(rq);
 388         rq->buffer = (char *) pc;
 389         rq->cmd_type = REQ_TYPE_SPECIAL;
 390         rq->rq_disk = floppy->disk;
 391         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 392 }
 393
 394 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
 395 {
 396         idefloppy_floppy_t *floppy = drive->driver_data;
 397
 398         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 399                 floppy->pc_stack_index=0;
 400         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 401 }
 402
 403 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 404 {
 405         idefloppy_floppy_t *floppy = drive->driver_data;
 406
 407         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 408                 floppy->rq_stack_index = 0;
 409         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 410 }
 411
 412 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 413 {
 414         idefloppy_floppy_t *floppy = drive->driver_data;
 415         u8 *buf = floppy->pc->buffer;
 416
 417         debug_log("Reached %s\n", __func__);
 418
 419         if (!floppy->pc->error) {
 420                 floppy->sense_key = buf[2] & 0x0F;
 421                 floppy->asc = buf[12];
 422                 floppy->ascq = buf[13];
 423                 floppy->progress_indication = buf[15] & 0x80 ?
 424                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 425
 426                 if (floppy->failed_pc)
 427                         debug_log("pc = %x, sense key = %x, asc = %x,"
 428                                         " ascq = %x\n",
 429                                         floppy->failed_pc->c[0],
 430                                         floppy->sense_key,
 431                                         floppy->asc,
 432                                         floppy->ascq);
 433                 else
 434                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 435                                         floppy->sense_key,
 436                                         floppy->asc,
 437                                         floppy->ascq);
 438
 439
 440                 idefloppy_do_end_request(drive, 1, 0);
 441         } else {
 442                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 443                                 " request!\n");
 444                 idefloppy_do_end_request(drive, 0, 0);
 445         }
 446 }
 447
 448 /*
 449  *      General packet command callback function.
 450  */
 451 static void idefloppy_pc_callback (ide_drive_t *drive)
 452 {
 453         idefloppy_floppy_t *floppy = drive->driver_data;
 454
 455         debug_log("Reached %s\n", __func__);
 456
 457         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 458 }
 459
 460 /*
 461  *      idefloppy_init_pc initializes a packet command.
 462  */
 463 static void idefloppy_init_pc (idefloppy_pc_t *pc)
 464 {
 465         memset(pc->c, 0, 12);
 466         pc->retries = 0;
 467         pc->flags = 0;
 468         pc->request_transfer = 0;
 469         pc->buffer = pc->pc_buffer;
 470         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
 471         pc->callback = &idefloppy_pc_callback;
 472 }
 473
 474 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
 475 {
 476         idefloppy_init_pc(pc);
 477         pc->c[0] = GPCMD_REQUEST_SENSE;
 478         pc->c[4] = 255;
 479         pc->request_transfer = 18;
 480         pc->callback = &idefloppy_request_sense_callback;
 481 }
 482
 483 /*
 484  *      idefloppy_retry_pc is called when an error was detected during the
 485  *      last packet command. We queue a request sense packet command in
 486  *      the head of the request list.
 487  */
 488 static void idefloppy_retry_pc (ide_drive_t *drive)
 489 {
 490         idefloppy_pc_t *pc;
 491         struct request *rq;
 492
 493         (void)drive->hwif->INB(IDE_ERROR_REG);
 494         pc = idefloppy_next_pc_storage(drive);
 495         rq = idefloppy_next_rq_storage(drive);
 496         idefloppy_create_request_sense_cmd(pc);
 497         idefloppy_queue_pc_head(drive, pc, rq);
 498 }
 499
 500 /* The usual interrupt handler called during a packet command. */
 501 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 502 {
 503         idefloppy_floppy_t *floppy = drive->driver_data;
 504         ide_hwif_t *hwif = drive->hwif;
 505         idefloppy_pc_t *pc = floppy->pc;
 506         struct request *rq = pc->rq;
 507         xfer_func_t *xferfunc;
 508         unsigned int temp;
 509         int dma_error = 0;
 510         u16 bcount;
 511         u8 stat, ireason;
 512
 513         debug_log("Reached %s interrupt handler\n", __func__);
 514
 515         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 516                 dma_error = hwif->ide_dma_end(drive);
 517                 if (dma_error) {
 518                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 519                                         rq_data_dir(rq) ? "write" : "read");
 520                         pc->flags |= PC_FLAG_DMA_ERROR;
 521                 } else {
 522                         pc->actually_transferred = pc->request_transfer;
 523                         idefloppy_update_buffers(drive, pc);
 524                 }
 525                 debug_log("DMA finished\n");
 526         }
 527
 528         /* Clear the interrupt */
 529         stat = drive->hwif->INB(IDE_STATUS_REG);
 530
 531         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
 532                 debug_log("Packet command completed, %d bytes transferred\n",
 533                                 pc->actually_transferred);
 534                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 535
 536                 local_irq_enable_in_hardirq();
 537
 538                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 539                         /* Error detected */
 540                         debug_log("%s: I/O error\n", drive->name);
 541                         rq->errors++;
 542                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 543                                 printk(KERN_ERR "ide-floppy: I/O error in "
 544                                         "request sense command\n");
 545                                 return ide_do_reset(drive);
 546                         }
 547                         /* Retry operation */
 548                         idefloppy_retry_pc(drive);
 549                         /* queued, but not started */
 550                         return ide_stopped;
 551                 }
 552                 pc->error = 0;
 553                 if (floppy->failed_pc == pc)
 554                         floppy->failed_pc = NULL;
 555                 /* Command finished - Call the callback function */
 556                 pc->callback(drive);
 557                 return ide_stopped;
 558         }
 559
 560         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 561                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 562                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 563                         "more interrupts in DMA mode\n");
 564                 ide_dma_off(drive);
 565                 return ide_do_reset(drive);
 566         }
 567
 568         /* Get the number of bytes to transfer */
 569         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
 570                   hwif->INB(IDE_BCOUNTL_REG);
 571         /* on this interrupt */
 572         ireason = hwif->INB(IDE_IREASON_REG);
 573
 574         if (ireason & CD) {
 575                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 576                 return ide_do_reset(drive);
 577         }
 578         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 579                 /* Hopefully, we will never get here */
 580                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 581                                 (ireason & IO) ? "Write" : "Read");
 582                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 583                                 (ireason & IO) ? "Read" : "Write");
 584                 return ide_do_reset(drive);
 585         }
 586         if (!(pc->flags & PC_FLAG_WRITING)) {
 587                 /* Reading - Check that we have enough space */
 588                 temp = pc->actually_transferred + bcount;
 589                 if (temp > pc->request_transfer) {
 590                         if (temp > pc->buffer_size) {
 591                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 592                                         "to send us more data than expected "
 593                                         "- discarding data\n");
 594                                 idefloppy_discard_data(drive, bcount);
 595
 596                                 ide_set_handler(drive,
 597                                                 &idefloppy_pc_intr,
 598                                                 IDEFLOPPY_WAIT_CMD,
 599                                                 NULL);
 600                                 return ide_started;
 601                         }
 602                         debug_log("The floppy wants to send us more data than"
 603                                         " expected - allowing transfer\n");
 604                 }
 605         }
 606         if (pc->flags & PC_FLAG_WRITING)
 607                 xferfunc = hwif->atapi_output_bytes;
 608         else
 609                 xferfunc = hwif->atapi_input_bytes;
 610
 611         if (pc->buffer)
 612                 xferfunc(drive, pc->current_position, bcount);
 613         else
 614                 ide_floppy_io_buffers(drive, pc, bcount,
 615                                       !!(pc->flags & PC_FLAG_WRITING));
 616
 617         /* Update the current position */
 618         pc->actually_transferred += bcount;
 619         pc->current_position += bcount;
 620
 621         /* And set the interrupt handler again */
 622         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 623         return ide_started;
 624 }
 625
 626 /*
 627  * This is the original routine that did the packet transfer.
 628  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 629  * for that drive below. The algorithm is chosen based on drive type
 630  */
 631 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 632 {
 633         ide_startstop_t startstop;
 634         idefloppy_floppy_t *floppy = drive->driver_data;
 635         u8 ireason;
 636
 637         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 638                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 639                                 "initiated yet DRQ isn't asserted\n");
 640                 return startstop;
 641         }
 642         ireason = drive->hwif->INB(IDE_IREASON_REG);
 643         if ((ireason & CD) == 0 || (ireason & IO)) {
 644                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 645                                 "issuing a packet command\n");
 646                 return ide_do_reset(drive);
 647         }
 648
 649         /* Set the interrupt routine */
 650         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 651         /* Send the actual packet */
 652         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 653         return ide_started;
 654 }
 655
 656
 657 /*
 658  * What we have here is a classic case of a top half / bottom half
 659  * interrupt service routine. In interrupt mode, the device sends
 660  * an interrupt to signal it's ready to receive a packet. However,
 661  * we need to delay about 2-3 ticks before issuing the packet or we
 662  * gets in trouble.
 663  *
 664  * So, follow carefully. transfer_pc1 is called as an interrupt (or
 665  * directly). In either case, when the device says it's ready for a
 666  * packet, we schedule the packet transfer to occur about 2-3 ticks
 667  * later in transfer_pc2.
 668  */
 669 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 670 {
 671         idefloppy_floppy_t *floppy = drive->driver_data;
 672
 673         /* Send the actual packet */
 674         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 675         /* Timeout for the packet command */
 676         return IDEFLOPPY_WAIT_CMD;
 677 }
 678
 679 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 680 {
 681         idefloppy_floppy_t *floppy = drive->driver_data;
 682         ide_startstop_t startstop;
 683         u8 ireason;
 684
 685         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 686                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 687                                 "initiated yet DRQ isn't asserted\n");
 688                 return startstop;
 689         }
 690         ireason = drive->hwif->INB(IDE_IREASON_REG);
 691         if ((ireason & CD) == 0 || (ireason & IO)) {
 692                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 693                                 "while issuing a packet command\n");
 694                 return ide_do_reset(drive);
 695         }
 696         /*
 697          * The following delay solves a problem with ATAPI Zip 100 drives
 698          * where the Busy flag was apparently being deasserted before the
 699          * unit was ready to receive data. This was happening on a
 700          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 701          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 702          * used until after the packet is moved in about 50 msec.
 703          */
 704
 705         ide_set_handler(drive,
 706           &idefloppy_pc_intr,           /* service routine for packet command */
 707           floppy->ticks,                /* wait this long before "failing" */
 708           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
 709         return ide_started;
 710 }
 711
 712 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 713                                     idefloppy_pc_t *pc)
 714 {
 715         /* supress error messages resulting from Medium not present */
 716         if (floppy->sense_key == 0x02 &&
 717             floppy->asc       == 0x3a &&
 718             floppy->ascq      == 0x00)
 719                 return;
 720
 721         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 722                         "asc = %2x, ascq = %2x\n",
 723                         floppy->drive->name, pc->c[0], floppy->sense_key,
 724                         floppy->asc, floppy->ascq);
 725
 726 }
 727
 728 /*
 729  *      Issue a packet command
 730  */
 731 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
 732 {
 733         idefloppy_floppy_t *floppy = drive->driver_data;
 734         ide_hwif_t *hwif = drive->hwif;
 735         ide_handler_t *pkt_xfer_routine;
 736         u16 bcount;
 737         u8 dma;
 738
 739         if (floppy->failed_pc == NULL &&
 740             pc->c[0] != GPCMD_REQUEST_SENSE)
 741                 floppy->failed_pc = pc;
 742         /* Set the current packet command */
 743         floppy->pc = pc;
 744
 745         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 746                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 747                         ide_floppy_report_error(floppy, pc);
 748                 /* Giving up */
 749                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 750
 751                 floppy->failed_pc = NULL;
 752                 pc->callback(drive);
 753                 return ide_stopped;
 754         }
 755
 756         debug_log("Retry number - %d\n", pc->retries);
 757
 758         pc->retries++;
 759         /* We haven't transferred any data yet */
 760         pc->actually_transferred = 0;
 761         pc->current_position = pc->buffer;
 762         bcount = min(pc->request_transfer, 63 * 1024);
 763
 764         if (pc->flags & PC_FLAG_DMA_ERROR) {
 765                 pc->flags &= ~PC_FLAG_DMA_ERROR;
 766                 ide_dma_off(drive);
 767         }
 768         dma = 0;
 769
 770         if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
 771                 dma = !hwif->dma_setup(drive);
 772
 773         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 774                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 775
 776         if (dma) {      /* Begin DMA, if necessary */
 777                 pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
 778                 hwif->dma_start(drive);
 779         }
 780
 781         /* Can we transfer the packet when we get the interrupt or wait? */
 782         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
 783                 /* wait */
 784                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 785         } else {
 786                 /* immediate */
 787                 pkt_xfer_routine = &idefloppy_transfer_pc;
 788         }
 789
 790         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
 791                 /* Issue the packet command */
 792                 ide_execute_command(drive, WIN_PACKETCMD,
 793                                 pkt_xfer_routine,
 794                                 IDEFLOPPY_WAIT_CMD,
 795                                 NULL);
 796                 return ide_started;
 797         } else {
 798                 /* Issue the packet command */
 799                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
 800                 return (*pkt_xfer_routine) (drive);
 801         }
 802 }
 803
 804 static void idefloppy_rw_callback (ide_drive_t *drive)
 805 {
 806         debug_log("Reached %s\n", __func__);
 807
 808         idefloppy_do_end_request(drive, 1, 0);
 809         return;
 810 }
 811
 812 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
 813 {
 814         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 815
 816         idefloppy_init_pc(pc);
 817         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 818         pc->c[4] = prevent;
 819 }
 820
 821 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
 822 {
 823         idefloppy_init_pc(pc);
 824         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 825         pc->c[7] = 255;
 826         pc->c[8] = 255;
 827         pc->request_transfer = 255;
 828 }
 829
 830 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 831                                               int flags)
 832 {
 833         idefloppy_init_pc(pc);
 834         pc->c[0] = GPCMD_FORMAT_UNIT;
 835         pc->c[1] = 0x17;
 836
 837         memset(pc->buffer, 0, 12);
 838         pc->buffer[1] = 0xA2;
 839         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 840
 841         if (flags & 1)                          /* Verify bit on... */
 842                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
 843         pc->buffer[3] = 8;
 844
 845         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 846         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 847         pc->buffer_size=12;
 848         pc->flags |= PC_FLAG_WRITING;
 849 }
 850
 851 /*
 852  *      A mode sense command is used to "sense" floppy parameters.
 853  */
 854 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
 855 {
 856         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 857
 858         idefloppy_init_pc(pc);
 859         pc->c[0] = GPCMD_MODE_SENSE_10;
 860         pc->c[1] = 0;
 861         pc->c[2] = page_code + (type << 6);
 862
 863         switch (page_code) {
 864                 case IDEFLOPPY_CAPABILITIES_PAGE:
 865                         length += 12;
 866                         break;
 867                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 868                         length += 32;
 869                         break;
 870                 default:
 871                         printk(KERN_ERR "ide-floppy: unsupported page code "
 872                                 "in create_mode_sense_cmd\n");
 873         }
 874         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 875         pc->request_transfer = length;
 876 }
 877
 878 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
 879 {
 880         idefloppy_init_pc(pc);
 881         pc->c[0] = GPCMD_START_STOP_UNIT;
 882         pc->c[4] = start;
 883 }
 884
 885 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 886 {
 887         idefloppy_init_pc(pc);
 888         pc->c[0] = GPCMD_TEST_UNIT_READY;
 889 }
 890
 891 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 892                                     idefloppy_pc_t *pc, struct request *rq,
 893                                     unsigned long sector)
 894 {
 895         int block = sector / floppy->bs_factor;
 896         int blocks = rq->nr_sectors / floppy->bs_factor;
 897         int cmd = rq_data_dir(rq);
 898
 899         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 900                 block, blocks);
 901
 902         idefloppy_init_pc(pc);
 903         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 904         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 905         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 906
 907         pc->callback = &idefloppy_rw_callback;
 908         pc->rq = rq;
 909         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 910         if (rq->cmd_flags & REQ_RW)
 911                 pc->flags |= PC_FLAG_WRITING;
 912         pc->buffer = NULL;
 913         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
 914         pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 915 }
 916
 917 static void
 918 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 919 {
 920         idefloppy_init_pc(pc);
 921         pc->callback = &idefloppy_rw_callback;
 922         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 923         pc->rq = rq;
 924         pc->b_count = rq->data_len;
 925         if (rq->data_len && rq_data_dir(rq) == WRITE)
 926                 pc->flags |= PC_FLAG_WRITING;
 927         pc->buffer = rq->data;
 928         if (rq->bio)
 929                 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 930         /*
 931          * possibly problematic, doesn't look like ide-floppy correctly
 932          * handled scattered requests if dma fails...
 933          */
 934         pc->request_transfer = pc->buffer_size = rq->data_len;
 935 }
 936
 937 /*
 938  *      idefloppy_do_request is our request handling function.
 939  */
 940 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
 941 {
 942         idefloppy_floppy_t *floppy = drive->driver_data;
 943         idefloppy_pc_t *pc;
 944         unsigned long block = (unsigned long)block_s;
 945
 946         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 947                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 948                         rq->cmd_type, rq->errors);
 949         debug_log("sector: %ld, nr_sectors: %ld, "
 950                         "current_nr_sectors: %d\n", (long)rq->sector,
 951                         rq->nr_sectors, rq->current_nr_sectors);
 952
 953         if (rq->errors >= ERROR_MAX) {
 954                 if (floppy->failed_pc)
 955                         ide_floppy_report_error(floppy, floppy->failed_pc);
 956                 else
 957                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 958                                 drive->name);
 959                 idefloppy_do_end_request(drive, 0, 0);
 960                 return ide_stopped;
 961         }
 962         if (blk_fs_request(rq)) {
 963                 if (((long)rq->sector % floppy->bs_factor) ||
 964                     (rq->nr_sectors % floppy->bs_factor)) {
 965                         printk("%s: unsupported r/w request size\n",
 966                                 drive->name);
 967                         idefloppy_do_end_request(drive, 0, 0);
 968                         return ide_stopped;
 969                 }
 970                 pc = idefloppy_next_pc_storage(drive);
 971                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 972         } else if (blk_special_request(rq)) {
 973                 pc = (idefloppy_pc_t *) rq->buffer;
 974         } else if (blk_pc_request(rq)) {
 975                 pc = idefloppy_next_pc_storage(drive);
 976                 idefloppy_blockpc_cmd(floppy, pc, rq);
 977         } else {
 978                 blk_dump_rq_flags(rq,
 979                         "ide-floppy: unsupported command in queue");
 980                 idefloppy_do_end_request(drive, 0, 0);
 981                 return ide_stopped;
 982         }
 983
 984         pc->rq = rq;
 985         return idefloppy_issue_pc(drive, pc);
 986 }
 987
 988 /*
 989  *      idefloppy_queue_pc_tail adds a special packet command request to the
 990  *      tail of the request queue, and waits for it to be serviced.
 991  */
 992 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
 993 {
 994         struct ide_floppy_obj *floppy = drive->driver_data;
 995         struct request rq;
 996
 997         ide_init_drive_cmd (&rq);
 998         rq.buffer = (char *) pc;
 999         rq.cmd_type = REQ_TYPE_SPECIAL;
1000         rq.rq_disk = floppy->disk;
1001
1002         return ide_do_drive_cmd(drive, &rq, ide_wait);
1003 }
1004
1005 /*
1006  * Look at the flexible disk page parameters. We ignore the CHS capacity
1007  * parameters and use the LBA parameters instead.
1008  */
1009 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1010 {
1011         idefloppy_floppy_t *floppy = drive->driver_data;
1012         idefloppy_pc_t pc;
1013         u8 *page;
1014         int capacity, lba_capacity;
1015         u16 transfer_rate, sector_size, cyls, rpm;
1016         u8 heads, sectors;
1017
1018         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1019                                         MODE_SENSE_CURRENT);
1020
1021         if (idefloppy_queue_pc_tail(drive, &pc)) {
1022                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1023                                 " parameters\n");
1024                 return 1;
1025         }
1026         floppy->wp = !!(pc.buffer[3] & 0x80);
1027         set_disk_ro(floppy->disk, floppy->wp);
1028         page = &pc.buffer[8];
1029
1030         transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1031         sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1032         cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1033         rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1034         heads         = pc.buffer[8 + 4];
1035         sectors       = pc.buffer[8 + 5];
1036
1037         capacity = cyls * heads * sectors * sector_size;
1038
1039         if (memcmp(page, &floppy->flexible_disk_page, 32))
1040                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1041                                 "%d sector size, %d rpm\n",
1042                                 drive->name, capacity / 1024, cyls, heads,
1043                                 sectors, transfer_rate / 8, sector_size, rpm);
1044
1045         memcpy(&floppy->flexible_disk_page, page, 32);
1046         drive->bios_cyl = cyls;
1047         drive->bios_head = heads;
1048         drive->bios_sect = sectors;
1049         lba_capacity = floppy->blocks * floppy->block_size;
1050
1051         if (capacity < lba_capacity) {
1052                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1053                         "bytes, but the drive only handles %d\n",
1054                         drive->name, lba_capacity, capacity);
1055                 floppy->blocks = floppy->block_size ?
1056                         capacity / floppy->block_size : 0;
1057         }
1058         return 0;
1059 }
1060
1061 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1062 {
1063         idefloppy_floppy_t *floppy = drive->driver_data;
1064         idefloppy_pc_t pc;
1065
1066         floppy->srfp = 0;
1067         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1068                                                  MODE_SENSE_CURRENT);
1069
1070         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
1071         if (idefloppy_queue_pc_tail(drive, &pc))
1072                 return 1;
1073
1074         floppy->srfp = pc.buffer[8 + 2] & 0x40;
1075         return (0);
1076 }
1077
1078 /*
1079  * Determine if a media is present in the floppy drive, and if so, its LBA
1080  * capacity.
1081  */
1082 static int ide_floppy_get_capacity(ide_drive_t *drive)
1083 {
1084         idefloppy_floppy_t *floppy = drive->driver_data;
1085         idefloppy_pc_t pc;
1086         u8 *cap_desc;
1087         u8 header_len, desc_cnt;
1088         int i, rc = 1, blocks, length;
1089
1090         drive->bios_cyl = 0;
1091         drive->bios_head = drive->bios_sect = 0;
1092         floppy->blocks = 0;
1093         floppy->bs_factor = 1;
1094         set_capacity(floppy->disk, 0);
1095
1096         idefloppy_create_read_capacity_cmd(&pc);
1097         if (idefloppy_queue_pc_tail(drive, &pc)) {
1098                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1099                 return 1;
1100         }
1101         header_len = pc.buffer[3];
1102         cap_desc = &pc.buffer[4];
1103         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1104
1105         for (i = 0; i < desc_cnt; i++) {
1106                 unsigned int desc_start = 4 + i*8;
1107
1108                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1109                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1110
1111                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1112                                 i, blocks * length / 1024, blocks, length);
1113
1114                 if (i)
1115                         continue;
1116                 /*
1117                  * the code below is valid only for the 1st descriptor, ie i=0
1118                  */
1119
1120                 switch (pc.buffer[desc_start + 4] & 0x03) {
1121                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1122                 case CAPACITY_UNFORMATTED:
1123                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1124                                 /*
1125                                  * If it is not a clik drive, break out
1126                                  * (maintains previous driver behaviour)
1127                                  */
1128                                 break;
1129                 case CAPACITY_CURRENT:
1130                         /* Normal Zip/LS-120 disks */
1131                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1132                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1133                                         "sector size\n", drive->name,
1134                                         blocks * length / 1024, blocks, length);
1135                         memcpy(&floppy->cap_desc, cap_desc, 8);
1136
1137                         if (!length || length % 512) {
1138                                 printk(KERN_NOTICE "%s: %d bytes block size "
1139                                         "not supported\n", drive->name, length);
1140                         } else {
1141                                 floppy->blocks = blocks;
1142                                 floppy->block_size = length;
1143                                 floppy->bs_factor = length / 512;
1144                                 if (floppy->bs_factor != 1)
1145                                         printk(KERN_NOTICE "%s: warning: non "
1146                                                 "512 bytes block size not "
1147                                                 "fully supported\n",
1148                                                 drive->name);
1149                                 rc = 0;
1150                         }
1151                         break;
1152                 case CAPACITY_NO_CARTRIDGE:
1153                         /*
1154                          * This is a KERN_ERR so it appears on screen
1155                          * for the user to see
1156                          */
1157                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1158                         break;
1159                 case CAPACITY_INVALID:
1160                         printk(KERN_ERR "%s: Invalid capacity for disk "
1161                                 "in drive\n", drive->name);
1162                         break;
1163                 }
1164                 debug_log("Descriptor 0 Code: %d\n",
1165                           pc.buffer[desc_start + 4] & 0x03);
1166         }
1167
1168         /* Clik! disk does not support get_flexible_disk_page */
1169         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1170                 (void) ide_floppy_get_flexible_disk_page(drive);
1171
1172         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1173         return rc;
1174 }
1175
1176 /*
1177  * Obtain the list of formattable capacities.
1178  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1179  * descriptors to userland, instead of our own structures.
1180  *
1181  * Userland gives us the following structure:
1182  *
1183  * struct idefloppy_format_capacities {
1184  *      int nformats;
1185  *      struct {
1186  *              int nblocks;
1187  *              int blocksize;
1188  *      } formats[];
1189  * };
1190  *
1191  * userland initializes nformats to the number of allocated formats[] records.
1192  * On exit we set nformats to the number of records we've actually initialized.
1193  */
1194
1195 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1196 {
1197         idefloppy_pc_t pc;
1198         u8 header_len, desc_cnt;
1199         int i, blocks, length, u_array_size, u_index;
1200         int __user *argp;
1201
1202         if (get_user(u_array_size, arg))
1203                 return (-EFAULT);
1204
1205         if (u_array_size <= 0)
1206                 return (-EINVAL);
1207
1208         idefloppy_create_read_capacity_cmd(&pc);
1209         if (idefloppy_queue_pc_tail(drive, &pc)) {
1210                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1211                 return (-EIO);
1212         }
1213         header_len = pc.buffer[3];
1214         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1215
1216         u_index = 0;
1217         argp = arg + 1;
1218
1219         /*
1220          * We always skip the first capacity descriptor.  That's the current
1221          * capacity.  We are interested in the remaining descriptors, the
1222          * formattable capacities.
1223          */
1224         for (i = 1; i < desc_cnt; i++) {
1225                 unsigned int desc_start = 4 + i*8;
1226
1227                 if (u_index >= u_array_size)
1228                         break;  /* User-supplied buffer too small */
1229
1230                 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1231                 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1232
1233                 if (put_user(blocks, argp))
1234                         return(-EFAULT);
1235                 ++argp;
1236
1237                 if (put_user(length, argp))
1238                         return (-EFAULT);
1239                 ++argp;
1240
1241                 ++u_index;
1242         }
1243
1244         if (put_user(u_index, arg))
1245                 return (-EFAULT);
1246         return (0);
1247 }
1248
1249 /*
1250 ** Get ATAPI_FORMAT_UNIT progress indication.
1251 **
1252 ** Userland gives a pointer to an int.  The int is set to a progress
1253 ** indicator 0-65536, with 65536=100%.
1254 **
1255 ** If the drive does not support format progress indication, we just check
1256 ** the dsc bit, and return either 0 or 65536.
1257 */
1258
1259 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1260 {
1261         idefloppy_floppy_t *floppy = drive->driver_data;
1262         idefloppy_pc_t pc;
1263         int progress_indication = 0x10000;
1264
1265         if (floppy->srfp) {
1266                 idefloppy_create_request_sense_cmd(&pc);
1267                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1268                         return (-EIO);
1269                 }
1270
1271                 if (floppy->sense_key == 2 &&
1272                     floppy->asc == 4 &&
1273                     floppy->ascq == 4) {
1274                         progress_indication = floppy->progress_indication;
1275                 }
1276                 /* Else assume format_unit has finished, and we're
1277                 ** at 0x10000 */
1278         } else {
1279                 unsigned long flags;
1280                 u8 stat;
1281
1282                 local_irq_save(flags);
1283                 stat = drive->hwif->INB(IDE_STATUS_REG);
1284                 local_irq_restore(flags);
1285
1286                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1287         }
1288         if (put_user(progress_indication, arg))
1289                 return (-EFAULT);
1290
1291         return (0);
1292 }
1293
1294 /*
1295  *      Return the current floppy capacity.
1296  */
1297 static sector_t idefloppy_capacity (ide_drive_t *drive)
1298 {
1299         idefloppy_floppy_t *floppy = drive->driver_data;
1300         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1301
1302         return capacity;
1303 }
1304
1305 /*
1306  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1307  * results.
1308  */
1309 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1310 {
1311         struct idefloppy_id_gcw gcw;
1312
1313         *((u16 *) &gcw) = id->config;
1314
1315 #ifdef CONFIG_PPC
1316         /* kludge for Apple PowerBook internal zip */
1317         if ((gcw.device_type == 5) &&
1318             !strstr(id->model, "CD-ROM") &&
1319             strstr(id->model, "ZIP"))
1320                 gcw.device_type = 0;
1321 #endif
1322
1323         if (gcw.protocol != 2)
1324                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1325                                 gcw.protocol);
1326         else if (gcw.device_type != 0)
1327                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1328                                 "to floppy\n", gcw.device_type);
1329         else if (!gcw.removable)
1330                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1331         else if (gcw.drq_type == 3) {
1332                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1333                                 "supported\n", gcw.drq_type);
1334         } else if (gcw.packet_size != 0) {
1335                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1336                                 "bytes long\n", gcw.packet_size);
1337         } else
1338                 return 1;
1339         return 0;
1340 }
1341
1342 #ifdef CONFIG_IDE_PROC_FS
1343 static void idefloppy_add_settings(ide_drive_t *drive)
1344 {
1345         idefloppy_floppy_t *floppy = drive->driver_data;
1346
1347 /*
1348  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1349  */
1350         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1351         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1352         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1353         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1354 }
1355 #else
1356 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1357 #endif
1358
1359 /*
1360  *      Driver initialization.
1361  */
1362 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1363 {
1364         struct idefloppy_id_gcw gcw;
1365
1366         *((u16 *) &gcw) = drive->id->config;
1367         floppy->pc = floppy->pc_stack;
1368         if (gcw.drq_type == 1)
1369                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1370         /*
1371          *      We used to check revisions here. At this point however
1372          *      I'm giving up. Just assume they are all broken, its easier.
1373          *
1374          *      The actual reason for the workarounds was likely
1375          *      a driver bug after all rather than a firmware bug,
1376          *      and the workaround below used to hide it. It should
1377          *      be fixed as of version 1.9, but to be on the safe side
1378          *      we'll leave the limitation below for the 2.2.x tree.
1379          */
1380
1381         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1382                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1383                 /* This value will be visible in the /proc/ide/hdx/settings */
1384                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1385                 blk_queue_max_sectors(drive->queue, 64);
1386         }
1387
1388         /*
1389         *      Guess what?  The IOMEGA Clik! drive also needs the
1390         *      above fix.  It makes nasty clicking noises without
1391         *      it, so please don't remove this.
1392         */
1393         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1394                 blk_queue_max_sectors(drive->queue, 64);
1395                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1396         }
1397
1398
1399         (void) ide_floppy_get_capacity(drive);
1400         idefloppy_add_settings(drive);
1401 }
1402
1403 static void ide_floppy_remove(ide_drive_t *drive)
1404 {
1405         idefloppy_floppy_t *floppy = drive->driver_data;
1406         struct gendisk *g = floppy->disk;
1407
1408         ide_proc_unregister_driver(drive, floppy->driver);
1409
1410         del_gendisk(g);
1411
1412         ide_floppy_put(floppy);
1413 }
1414
1415 static void idefloppy_cleanup_obj(struct kref *kref)
1416 {
1417         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1418         ide_drive_t *drive = floppy->drive;
1419         struct gendisk *g = floppy->disk;
1420
1421         drive->driver_data = NULL;
1422         g->private_data = NULL;
1423         put_disk(g);
1424         kfree(floppy);
1425 }
1426
1427 #ifdef CONFIG_IDE_PROC_FS
1428 static int proc_idefloppy_read_capacity
1429         (char *page, char **start, off_t off, int count, int *eof, void *data)
1430 {
1431         ide_drive_t*drive = (ide_drive_t *)data;
1432         int len;
1433
1434         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1435         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1436 }
1437
1438 static ide_proc_entry_t idefloppy_proc[] = {
1439         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1440         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1441         { NULL, 0, NULL, NULL }
1442 };
1443 #endif  /* CONFIG_IDE_PROC_FS */
1444
1445 static int ide_floppy_probe(ide_drive_t *);
1446
1447 static ide_driver_t idefloppy_driver = {
1448         .gen_driver = {
1449                 .owner          = THIS_MODULE,
1450                 .name           = "ide-floppy",
1451                 .bus            = &ide_bus_type,
1452         },
1453         .probe                  = ide_floppy_probe,
1454         .remove                 = ide_floppy_remove,
1455         .version                = IDEFLOPPY_VERSION,
1456         .media                  = ide_floppy,
1457         .supports_dsc_overlap   = 0,
1458         .do_request             = idefloppy_do_request,
1459         .end_request            = idefloppy_do_end_request,
1460         .error                  = __ide_error,
1461         .abort                  = __ide_abort,
1462 #ifdef CONFIG_IDE_PROC_FS
1463         .proc                   = idefloppy_proc,
1464 #endif
1465 };
1466
1467 static int idefloppy_open(struct inode *inode, struct file *filp)
1468 {
1469         struct gendisk *disk = inode->i_bdev->bd_disk;
1470         struct ide_floppy_obj *floppy;
1471         ide_drive_t *drive;
1472         idefloppy_pc_t pc;
1473         int ret = 0;
1474
1475         debug_log("Reached %s\n", __func__);
1476
1477         if (!(floppy = ide_floppy_get(disk)))
1478                 return -ENXIO;
1479
1480         drive = floppy->drive;
1481
1482         floppy->openers++;
1483
1484         if (floppy->openers == 1) {
1485                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1486                 /* Just in case */
1487
1488                 idefloppy_create_test_unit_ready_cmd(&pc);
1489                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1490                         idefloppy_create_start_stop_cmd(&pc, 1);
1491                         (void) idefloppy_queue_pc_tail(drive, &pc);
1492                 }
1493
1494                 if (ide_floppy_get_capacity(drive)
1495                    && (filp->f_flags & O_NDELAY) == 0
1496                     /*
1497                     ** Allow O_NDELAY to open a drive without a disk, or with
1498                     ** an unreadable disk, so that we can get the format
1499                     ** capacity of the drive or begin the format - Sam
1500                     */
1501                     ) {
1502                         ret = -EIO;
1503                         goto out_put_floppy;
1504                 }
1505
1506                 if (floppy->wp && (filp->f_mode & 2)) {
1507                         ret = -EROFS;
1508                         goto out_put_floppy;
1509                 }
1510                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1511                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1512                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1513                         idefloppy_create_prevent_cmd(&pc, 1);
1514                         (void) idefloppy_queue_pc_tail(drive, &pc);
1515                 }
1516                 check_disk_change(inode->i_bdev);
1517         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1518                 ret = -EBUSY;
1519                 goto out_put_floppy;
1520         }
1521         return 0;
1522
1523 out_put_floppy:
1524         floppy->openers--;
1525         ide_floppy_put(floppy);
1526         return ret;
1527 }
1528
1529 static int idefloppy_release(struct inode *inode, struct file *filp)
1530 {
1531         struct gendisk *disk = inode->i_bdev->bd_disk;
1532         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1533         ide_drive_t *drive = floppy->drive;
1534         idefloppy_pc_t pc;
1535
1536         debug_log("Reached %s\n", __func__);
1537
1538         if (floppy->openers == 1) {
1539                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1540                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1541                         idefloppy_create_prevent_cmd(&pc, 0);
1542                         (void) idefloppy_queue_pc_tail(drive, &pc);
1543                 }
1544
1545                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1546         }
1547
1548         floppy->openers--;
1549
1550         ide_floppy_put(floppy);
1551
1552         return 0;
1553 }
1554
1555 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1556 {
1557         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1558         ide_drive_t *drive = floppy->drive;
1559
1560         geo->heads = drive->bios_head;
1561         geo->sectors = drive->bios_sect;
1562         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1563         return 0;
1564 }
1565
1566 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1567                                unsigned long arg, unsigned int cmd)
1568 {
1569         if (floppy->openers > 1)
1570                 return -EBUSY;
1571
1572         /* The IOMEGA Clik! Drive doesn't support this command -
1573          * no room for an eject mechanism */
1574         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1575                 int prevent = arg ? 1 : 0;
1576
1577                 if (cmd == CDROMEJECT)
1578                         prevent = 0;
1579
1580                 idefloppy_create_prevent_cmd(pc, prevent);
1581                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1582         }
1583
1584         if (cmd == CDROMEJECT) {
1585                 idefloppy_create_start_stop_cmd(pc, 2);
1586                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1587         }
1588
1589         return 0;
1590 }
1591
1592 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1593                                   int __user *arg)
1594 {
1595         int blocks, length, flags, err = 0;
1596         idefloppy_pc_t pc;
1597
1598         if (floppy->openers > 1) {
1599                 /* Don't format if someone is using the disk */
1600                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1601                 return -EBUSY;
1602         }
1603
1604         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1605
1606         /*
1607          * Send ATAPI_FORMAT_UNIT to the drive.
1608          *
1609          * Userland gives us the following structure:
1610          *
1611          * struct idefloppy_format_command {
1612          *        int nblocks;
1613          *        int blocksize;
1614          *        int flags;
1615          *        } ;
1616          *
1617          * flags is a bitmask, currently, the only defined flag is:
1618          *
1619          *        0x01 - verify media after format.
1620          */
1621         if (get_user(blocks, arg) ||
1622                         get_user(length, arg+1) ||
1623                         get_user(flags, arg+2)) {
1624                 err = -EFAULT;
1625                 goto out;
1626         }
1627
1628         (void) idefloppy_get_sfrp_bit(floppy->drive);
1629         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1630
1631         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1632                 err = -EIO;
1633
1634 out:
1635         if (err)
1636                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1637         return err;
1638 }
1639
1640
1641 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1642                         unsigned int cmd, unsigned long arg)
1643 {
1644         struct block_device *bdev = inode->i_bdev;
1645         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1646         ide_drive_t *drive = floppy->drive;
1647         idefloppy_pc_t pc;
1648         void __user *argp = (void __user *)arg;
1649         int err;
1650
1651         switch (cmd) {
1652         case CDROMEJECT:
1653                 /* fall through */
1654         case CDROM_LOCKDOOR:
1655                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1656         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1657                 return 0;
1658         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1659                 return ide_floppy_get_format_capacities(drive, argp);
1660         case IDEFLOPPY_IOCTL_FORMAT_START:
1661                 if (!(file->f_mode & 2))
1662                         return -EPERM;
1663
1664                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1665         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1666                 return idefloppy_get_format_progress(drive, argp);
1667         }
1668
1669         /*
1670          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1671          * and CDROM_SEND_PACKET (legacy) ioctls
1672          */
1673         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1674                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1675                                         bdev->bd_disk, cmd, argp);
1676         else
1677                 err = -ENOTTY;
1678
1679         if (err == -ENOTTY)
1680                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1681
1682         return err;
1683 }
1684
1685 static int idefloppy_media_changed(struct gendisk *disk)
1686 {
1687         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1688         ide_drive_t *drive = floppy->drive;
1689         int ret;
1690
1691         /* do not scan partitions twice if this is a removable device */
1692         if (drive->attach) {
1693                 drive->attach = 0;
1694                 return 0;
1695         }
1696         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1697         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1698         return ret;
1699 }
1700
1701 static int idefloppy_revalidate_disk(struct gendisk *disk)
1702 {
1703         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1704         set_capacity(disk, idefloppy_capacity(floppy->drive));
1705         return 0;
1706 }
1707
1708 static struct block_device_operations idefloppy_ops = {
1709         .owner          = THIS_MODULE,
1710         .open           = idefloppy_open,
1711         .release        = idefloppy_release,
1712         .ioctl          = idefloppy_ioctl,
1713         .getgeo         = idefloppy_getgeo,
1714         .media_changed  = idefloppy_media_changed,
1715         .revalidate_disk= idefloppy_revalidate_disk
1716 };
1717
1718 static int ide_floppy_probe(ide_drive_t *drive)
1719 {
1720         idefloppy_floppy_t *floppy;
1721         struct gendisk *g;
1722
1723         if (!strstr("ide-floppy", drive->driver_req))
1724                 goto failed;
1725         if (!drive->present)
1726                 goto failed;
1727         if (drive->media != ide_floppy)
1728                 goto failed;
1729         if (!idefloppy_identify_device (drive, drive->id)) {
1730                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1731                 goto failed;
1732         }
1733         if (drive->scsi) {
1734                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1735                 goto failed;
1736         }
1737         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1738                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1739                 goto failed;
1740         }
1741
1742         g = alloc_disk(1 << PARTN_BITS);
1743         if (!g)
1744                 goto out_free_floppy;
1745
1746         ide_init_disk(g, drive);
1747
1748         ide_proc_register_driver(drive, &idefloppy_driver);
1749
1750         kref_init(&floppy->kref);
1751
1752         floppy->drive = drive;
1753         floppy->driver = &idefloppy_driver;
1754         floppy->disk = g;
1755
1756         g->private_data = &floppy->driver;
1757
1758         drive->driver_data = floppy;
1759
1760         idefloppy_setup (drive, floppy);
1761
1762         g->minors = 1 << PARTN_BITS;
1763         g->driverfs_dev = &drive->gendev;
1764         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1765         g->fops = &idefloppy_ops;
1766         drive->attach = 1;
1767         add_disk(g);
1768         return 0;
1769
1770 out_free_floppy:
1771         kfree(floppy);
1772 failed:
1773         return -ENODEV;
1774 }
1775
1776 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1777
1778 static void __exit idefloppy_exit (void)
1779 {
1780         driver_unregister(&idefloppy_driver.gen_driver);
1781 }
1782
1783 static int __init idefloppy_init(void)
1784 {
1785         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1786         return driver_register(&idefloppy_driver.gen_driver);
1787 }
1788
1789 MODULE_ALIAS("ide:*m-floppy*");
1790 module_init(idefloppy_init);
1791 module_exit(idefloppy_exit);
1792 MODULE_LICENSE("GPL");