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 } idefloppy_floppy_t;
 129
 130 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 131
 132 /* Defines for the MODE SENSE command */
 133 #define MODE_SENSE_CURRENT              0x00
 134 #define MODE_SENSE_CHANGEABLE           0x01
 135 #define MODE_SENSE_DEFAULT              0x02
 136 #define MODE_SENSE_SAVED                0x03
 137
 138 /* IOCTLs used in low-level formatting. */
 139 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 140 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 141 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 142 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 143
 144 /* Error code returned in rq->errors to the higher part of the driver. */
 145 #define IDEFLOPPY_ERROR_GENERAL         101
 146
 147 /*
 148  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 149  * See SFF-8070i spec.
 150  */
 151 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 152 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 153
 154 static DEFINE_MUTEX(idefloppy_ref_mutex);
 155
 156 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 157
 158 #define ide_floppy_g(disk) \
 159         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 160
 161 static void idefloppy_cleanup_obj(struct kref *);
 162
 163 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 164 {
 165         struct ide_floppy_obj *floppy = NULL;
 166
 167         mutex_lock(&idefloppy_ref_mutex);
 168         floppy = ide_floppy_g(disk);
 169         if (floppy) {
 170                 kref_get(&floppy->kref);
 171                 if (ide_device_get(floppy->drive)) {
 172                         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 173                         floppy = NULL;
 174                 }
 175         }
 176         mutex_unlock(&idefloppy_ref_mutex);
 177         return floppy;
 178 }
 179
 180 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 181 {
 182         mutex_lock(&idefloppy_ref_mutex);
 183         ide_device_put(floppy->drive);
 184         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 185         mutex_unlock(&idefloppy_ref_mutex);
 186 }
 187
 188 /*
 189  * Used to finish servicing a request. For read/write requests, we will call
 190  * ide_end_request to pass to the next buffer.
 191  */
 192 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 193 {
 194         idefloppy_floppy_t *floppy = drive->driver_data;
 195         struct request *rq = HWGROUP(drive)->rq;
 196         int error;
 197
 198         debug_log("Reached %s\n", __func__);
 199
 200         switch (uptodate) {
 201         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 202         case 1: error = 0; break;
 203         default: error = uptodate;
 204         }
 205         if (error)
 206                 floppy->failed_pc = NULL;
 207         /* Why does this happen? */
 208         if (!rq)
 209                 return 0;
 210         if (!blk_special_request(rq)) {
 211                 /* our real local end request function */
 212                 ide_end_request(drive, uptodate, nsecs);
 213                 return 0;
 214         }
 215         rq->errors = error;
 216         /* fixme: need to move this local also */
 217         ide_end_drive_cmd(drive, 0, 0);
 218         return 0;
 219 }
 220
 221 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 222                                   unsigned int bcount, int direction)
 223 {
 224         ide_hwif_t *hwif = drive->hwif;
 225         struct request *rq = pc->rq;
 226         struct req_iterator iter;
 227         struct bio_vec *bvec;
 228         unsigned long flags;
 229         int count, done = 0;
 230         char *data;
 231
 232         rq_for_each_segment(bvec, rq, iter) {
 233                 if (!bcount)
 234                         break;
 235
 236                 count = min(bvec->bv_len, bcount);
 237
 238                 data = bvec_kmap_irq(bvec, &flags);
 239                 if (direction)
 240                         hwif->tp_ops->output_data(drive, NULL, data, count);
 241                 else
 242                         hwif->tp_ops->input_data(drive, NULL, data, count);
 243                 bvec_kunmap_irq(data, &flags);
 244
 245                 bcount -= count;
 246                 pc->b_count += count;
 247                 done += count;
 248         }
 249
 250         idefloppy_end_request(drive, 1, done >> 9);
 251
 252         if (bcount) {
 253                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 254                                 drive->name, __func__, bcount);
 255                 ide_pad_transfer(drive, direction, bcount);
 256         }
 257 }
 258
 259 static void idefloppy_update_buffers(ide_drive_t *drive,
 260                                 struct ide_atapi_pc *pc)
 261 {
 262         struct request *rq = pc->rq;
 263         struct bio *bio = rq->bio;
 264
 265         while ((bio = rq->bio) != NULL)
 266                 idefloppy_end_request(drive, 1, 0);
 267 }
 268
 269 /*
 270  * Generate a new packet command request in front of the request queue, before
 271  * the current request so that it will be processed immediately, on the next
 272  * pass through the driver.
 273  */
 274 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 275                 struct request *rq)
 276 {
 277         struct ide_floppy_obj *floppy = drive->driver_data;
 278
 279         blk_rq_init(NULL, rq);
 280         rq->buffer = (char *) pc;
 281         rq->cmd_type = REQ_TYPE_SPECIAL;
 282         rq->cmd_flags |= REQ_PREEMPT;
 283         rq->rq_disk = floppy->disk;
 284         memcpy(rq->cmd, pc->c, 12);
 285         ide_do_drive_cmd(drive, rq);
 286 }
 287
 288 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 289 {
 290         idefloppy_floppy_t *floppy = drive->driver_data;
 291
 292         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 293                 floppy->pc_stack_index = 0;
 294         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 295 }
 296
 297 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 298 {
 299         idefloppy_floppy_t *floppy = drive->driver_data;
 300
 301         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 302                 floppy->rq_stack_index = 0;
 303         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 304 }
 305
 306 static void ide_floppy_callback(ide_drive_t *drive)
 307 {
 308         idefloppy_floppy_t *floppy = drive->driver_data;
 309         struct ide_atapi_pc *pc = floppy->pc;
 310         int uptodate = pc->error ? 0 : 1;
 311
 312         debug_log("Reached %s\n", __func__);
 313
 314         if (floppy->failed_pc == pc)
 315                 floppy->failed_pc = NULL;
 316
 317         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 318             (pc->rq && blk_pc_request(pc->rq)))
 319                 uptodate = 1; /* FIXME */
 320         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 321                 u8 *buf = floppy->pc->buf;
 322
 323                 if (!pc->error) {
 324                         floppy->sense_key = buf[2] & 0x0F;
 325                         floppy->asc = buf[12];
 326                         floppy->ascq = buf[13];
 327                         floppy->progress_indication = buf[15] & 0x80 ?
 328                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 329
 330                         if (floppy->failed_pc)
 331                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 332
 333                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 334                                   floppy->sense_key, floppy->asc, floppy->ascq);
 335                 } else
 336                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 337                                         "Aborting request!\n");
 338         }
 339
 340         idefloppy_end_request(drive, uptodate, 0);
 341 }
 342
 343 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 344 {
 345         memset(pc, 0, sizeof(*pc));
 346         pc->buf = pc->pc_buf;
 347         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 348 }
 349
 350 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 351 {
 352         idefloppy_init_pc(pc);
 353         pc->c[0] = GPCMD_REQUEST_SENSE;
 354         pc->c[4] = 255;
 355         pc->req_xfer = 18;
 356 }
 357
 358 /*
 359  * Called when an error was detected during the last packet command. We queue a
 360  * request sense packet command in the head of the request list.
 361  */
 362 static void idefloppy_retry_pc(ide_drive_t *drive)
 363 {
 364         struct ide_atapi_pc *pc;
 365         struct request *rq;
 366
 367         (void)ide_read_error(drive);
 368         pc = idefloppy_next_pc_storage(drive);
 369         rq = idefloppy_next_rq_storage(drive);
 370         idefloppy_create_request_sense_cmd(pc);
 371         idefloppy_queue_pc_head(drive, pc, rq);
 372 }
 373
 374 /* The usual interrupt handler called during a packet command. */
 375 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 376 {
 377         idefloppy_floppy_t *floppy = drive->driver_data;
 378
 379         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 380                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 381                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 382 }
 383
 384 /*
 385  * What we have here is a classic case of a top half / bottom half interrupt
 386  * service routine. In interrupt mode, the device sends an interrupt to signal
 387  * that it is ready to receive a packet. However, we need to delay about 2-3
 388  * ticks before issuing the packet or we gets in trouble.
 389  */
 390 static int idefloppy_transfer_pc(ide_drive_t *drive)
 391 {
 392         idefloppy_floppy_t *floppy = drive->driver_data;
 393
 394         /* Send the actual packet */
 395         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 396
 397         /* Timeout for the packet command */
 398         return IDEFLOPPY_WAIT_CMD;
 399 }
 400
 401
 402 /*
 403  * Called as an interrupt (or directly). When the device says it's ready for a
 404  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 405  * transfer_pc.
 406  */
 407 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 408 {
 409         idefloppy_floppy_t *floppy = drive->driver_data;
 410         struct ide_atapi_pc *pc = floppy->pc;
 411         ide_expiry_t *expiry;
 412         unsigned int timeout;
 413
 414         /*
 415          * The following delay solves a problem with ATAPI Zip 100 drives
 416          * where the Busy flag was apparently being deasserted before the
 417          * unit was ready to receive data. This was happening on a
 418          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 419          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 420          * used until after the packet is moved in about 50 msec.
 421          */
 422         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 423                 timeout = floppy->ticks;
 424                 expiry = &idefloppy_transfer_pc;
 425         } else {
 426                 timeout = IDEFLOPPY_WAIT_CMD;
 427                 expiry = NULL;
 428         }
 429
 430         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 431 }
 432
 433 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 434                                     struct ide_atapi_pc *pc)
 435 {
 436         /* supress error messages resulting from Medium not present */
 437         if (floppy->sense_key == 0x02 &&
 438             floppy->asc       == 0x3a &&
 439             floppy->ascq      == 0x00)
 440                 return;
 441
 442         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 443                         "asc = %2x, ascq = %2x\n",
 444                         floppy->drive->name, pc->c[0], floppy->sense_key,
 445                         floppy->asc, floppy->ascq);
 446
 447 }
 448
 449 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 450                 struct ide_atapi_pc *pc)
 451 {
 452         idefloppy_floppy_t *floppy = drive->driver_data;
 453
 454         if (floppy->failed_pc == NULL &&
 455             pc->c[0] != GPCMD_REQUEST_SENSE)
 456                 floppy->failed_pc = pc;
 457         /* Set the current packet command */
 458         floppy->pc = pc;
 459
 460         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 461                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 462                         ide_floppy_report_error(floppy, pc);
 463                 /* Giving up */
 464                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 465
 466                 floppy->failed_pc = NULL;
 467                 drive->pc_callback(drive);
 468                 return ide_stopped;
 469         }
 470
 471         debug_log("Retry number - %d\n", pc->retries);
 472
 473         pc->retries++;
 474
 475         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 476                             IDEFLOPPY_WAIT_CMD, NULL);
 477 }
 478
 479 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 480 {
 481         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 482
 483         idefloppy_init_pc(pc);
 484         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 485         pc->c[4] = prevent;
 486 }
 487
 488 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 489 {
 490         idefloppy_init_pc(pc);
 491         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 492         pc->c[7] = 255;
 493         pc->c[8] = 255;
 494         pc->req_xfer = 255;
 495 }
 496
 497 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 498                 int l, int flags)
 499 {
 500         idefloppy_init_pc(pc);
 501         pc->c[0] = GPCMD_FORMAT_UNIT;
 502         pc->c[1] = 0x17;
 503
 504         memset(pc->buf, 0, 12);
 505         pc->buf[1] = 0xA2;
 506         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 507
 508         if (flags & 1)                          /* Verify bit on... */
 509                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 510         pc->buf[3] = 8;
 511
 512         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 513         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 514         pc->buf_size = 12;
 515         pc->flags |= PC_FLAG_WRITING;
 516 }
 517
 518 /* A mode sense command is used to "sense" floppy parameters. */
 519 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 520                 u8 page_code, u8 type)
 521 {
 522         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 523
 524         idefloppy_init_pc(pc);
 525         pc->c[0] = GPCMD_MODE_SENSE_10;
 526         pc->c[1] = 0;
 527         pc->c[2] = page_code + (type << 6);
 528
 529         switch (page_code) {
 530         case IDEFLOPPY_CAPABILITIES_PAGE:
 531                 length += 12;
 532                 break;
 533         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 534                 length += 32;
 535                 break;
 536         default:
 537                 printk(KERN_ERR "ide-floppy: unsupported page code "
 538                                 "in create_mode_sense_cmd\n");
 539         }
 540         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 541         pc->req_xfer = length;
 542 }
 543
 544 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 545 {
 546         idefloppy_init_pc(pc);
 547         pc->c[0] = GPCMD_START_STOP_UNIT;
 548         pc->c[4] = start;
 549 }
 550
 551 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 552                                     struct ide_atapi_pc *pc, struct request *rq,
 553                                     unsigned long sector)
 554 {
 555         int block = sector / floppy->bs_factor;
 556         int blocks = rq->nr_sectors / floppy->bs_factor;
 557         int cmd = rq_data_dir(rq);
 558
 559         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 560                 block, blocks);
 561
 562         idefloppy_init_pc(pc);
 563         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 564         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 565         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 566
 567         memcpy(rq->cmd, pc->c, 12);
 568
 569         pc->rq = rq;
 570         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 571         if (rq->cmd_flags & REQ_RW)
 572                 pc->flags |= PC_FLAG_WRITING;
 573         pc->buf = NULL;
 574         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 575         pc->flags |= PC_FLAG_DMA_OK;
 576 }
 577
 578 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 579                 struct ide_atapi_pc *pc, struct request *rq)
 580 {
 581         idefloppy_init_pc(pc);
 582         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 583         pc->rq = rq;
 584         pc->b_count = rq->data_len;
 585         if (rq->data_len && rq_data_dir(rq) == WRITE)
 586                 pc->flags |= PC_FLAG_WRITING;
 587         pc->buf = rq->data;
 588         if (rq->bio)
 589                 pc->flags |= PC_FLAG_DMA_OK;
 590         /*
 591          * possibly problematic, doesn't look like ide-floppy correctly
 592          * handled scattered requests if dma fails...
 593          */
 594         pc->req_xfer = pc->buf_size = rq->data_len;
 595 }
 596
 597 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 598                 struct request *rq, sector_t block_s)
 599 {
 600         idefloppy_floppy_t *floppy = drive->driver_data;
 601         struct ide_atapi_pc *pc;
 602         unsigned long block = (unsigned long)block_s;
 603
 604         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 605                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 606                         rq->cmd_type, rq->errors);
 607         debug_log("sector: %ld, nr_sectors: %ld, "
 608                         "current_nr_sectors: %d\n", (long)rq->sector,
 609                         rq->nr_sectors, rq->current_nr_sectors);
 610
 611         if (rq->errors >= ERROR_MAX) {
 612                 if (floppy->failed_pc)
 613                         ide_floppy_report_error(floppy, floppy->failed_pc);
 614                 else
 615                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 616                                 drive->name);
 617                 idefloppy_end_request(drive, 0, 0);
 618                 return ide_stopped;
 619         }
 620         if (blk_fs_request(rq)) {
 621                 if (((long)rq->sector % floppy->bs_factor) ||
 622                     (rq->nr_sectors % floppy->bs_factor)) {
 623                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 624                                         drive->name);
 625                         idefloppy_end_request(drive, 0, 0);
 626                         return ide_stopped;
 627                 }
 628                 pc = idefloppy_next_pc_storage(drive);
 629                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 630         } else if (blk_special_request(rq)) {
 631                 pc = (struct ide_atapi_pc *) rq->buffer;
 632         } else if (blk_pc_request(rq)) {
 633                 pc = idefloppy_next_pc_storage(drive);
 634                 idefloppy_blockpc_cmd(floppy, pc, rq);
 635         } else {
 636                 blk_dump_rq_flags(rq,
 637                         "ide-floppy: unsupported command in queue");
 638                 idefloppy_end_request(drive, 0, 0);
 639                 return ide_stopped;
 640         }
 641
 642         pc->rq = rq;
 643
 644         return idefloppy_issue_pc(drive, pc);
 645 }
 646
 647 /*
 648  * Add a special packet command request to the tail of the request queue,
 649  * and wait for it to be serviced.
 650  */
 651 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 652 {
 653         struct ide_floppy_obj *floppy = drive->driver_data;
 654         struct request *rq;
 655         int error;
 656
 657         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 658         rq->buffer = (char *) pc;
 659         rq->cmd_type = REQ_TYPE_SPECIAL;
 660         memcpy(rq->cmd, pc->c, 12);
 661         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 662         blk_put_request(rq);
 663
 664         return error;
 665 }
 666
 667 /*
 668  * Look at the flexible disk page parameters. We ignore the CHS capacity
 669  * parameters and use the LBA parameters instead.
 670  */
 671 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 672 {
 673         idefloppy_floppy_t *floppy = drive->driver_data;
 674         struct ide_atapi_pc pc;
 675         u8 *page;
 676         int capacity, lba_capacity;
 677         u16 transfer_rate, sector_size, cyls, rpm;
 678         u8 heads, sectors;
 679
 680         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 681                                         MODE_SENSE_CURRENT);
 682
 683         if (idefloppy_queue_pc_tail(drive, &pc)) {
 684                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 685                                 " parameters\n");
 686                 return 1;
 687         }
 688         floppy->wp = !!(pc.buf[3] & 0x80);
 689         set_disk_ro(floppy->disk, floppy->wp);
 690         page = &pc.buf[8];
 691
 692         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 693         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 694         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 695         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 696         heads         = pc.buf[8 + 4];
 697         sectors       = pc.buf[8 + 5];
 698
 699         capacity = cyls * heads * sectors * sector_size;
 700
 701         if (memcmp(page, &floppy->flexible_disk_page, 32))
 702                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 703                                 "%d sector size, %d rpm\n",
 704                                 drive->name, capacity / 1024, cyls, heads,
 705                                 sectors, transfer_rate / 8, sector_size, rpm);
 706
 707         memcpy(&floppy->flexible_disk_page, page, 32);
 708         drive->bios_cyl = cyls;
 709         drive->bios_head = heads;
 710         drive->bios_sect = sectors;
 711         lba_capacity = floppy->blocks * floppy->block_size;
 712
 713         if (capacity < lba_capacity) {
 714                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 715                         "bytes, but the drive only handles %d\n",
 716                         drive->name, lba_capacity, capacity);
 717                 floppy->blocks = floppy->block_size ?
 718                         capacity / floppy->block_size : 0;
 719         }
 720         return 0;
 721 }
 722
 723 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 724 {
 725         idefloppy_floppy_t *floppy = drive->driver_data;
 726         struct ide_atapi_pc pc;
 727
 728         floppy->srfp = 0;
 729         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 730                                                  MODE_SENSE_CURRENT);
 731
 732         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 733         if (idefloppy_queue_pc_tail(drive, &pc))
 734                 return 1;
 735
 736         floppy->srfp = pc.buf[8 + 2] & 0x40;
 737         return (0);
 738 }
 739
 740 /*
 741  * Determine if a media is present in the floppy drive, and if so, its LBA
 742  * capacity.
 743  */
 744 static int ide_floppy_get_capacity(ide_drive_t *drive)
 745 {
 746         idefloppy_floppy_t *floppy = drive->driver_data;
 747         struct ide_atapi_pc pc;
 748         u8 *cap_desc;
 749         u8 header_len, desc_cnt;
 750         int i, rc = 1, blocks, length;
 751
 752         drive->bios_cyl = 0;
 753         drive->bios_head = drive->bios_sect = 0;
 754         floppy->blocks = 0;
 755         floppy->bs_factor = 1;
 756         set_capacity(floppy->disk, 0);
 757
 758         idefloppy_create_read_capacity_cmd(&pc);
 759         if (idefloppy_queue_pc_tail(drive, &pc)) {
 760                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 761                 return 1;
 762         }
 763         header_len = pc.buf[3];
 764         cap_desc = &pc.buf[4];
 765         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 766
 767         for (i = 0; i < desc_cnt; i++) {
 768                 unsigned int desc_start = 4 + i*8;
 769
 770                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 771                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 772
 773                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 774                                 i, blocks * length / 1024, blocks, length);
 775
 776                 if (i)
 777                         continue;
 778                 /*
 779                  * the code below is valid only for the 1st descriptor, ie i=0
 780                  */
 781
 782                 switch (pc.buf[desc_start + 4] & 0x03) {
 783                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 784                 case CAPACITY_UNFORMATTED:
 785                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 786                                 /*
 787                                  * If it is not a clik drive, break out
 788                                  * (maintains previous driver behaviour)
 789                                  */
 790                                 break;
 791                 case CAPACITY_CURRENT:
 792                         /* Normal Zip/LS-120 disks */
 793                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 794                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 795                                         "sector size\n", drive->name,
 796                                         blocks * length / 1024, blocks, length);
 797                         memcpy(&floppy->cap_desc, cap_desc, 8);
 798
 799                         if (!length || length % 512) {
 800                                 printk(KERN_NOTICE "%s: %d bytes block size "
 801                                         "not supported\n", drive->name, length);
 802                         } else {
 803                                 floppy->blocks = blocks;
 804                                 floppy->block_size = length;
 805                                 floppy->bs_factor = length / 512;
 806                                 if (floppy->bs_factor != 1)
 807                                         printk(KERN_NOTICE "%s: warning: non "
 808                                                 "512 bytes block size not "
 809                                                 "fully supported\n",
 810                                                 drive->name);
 811                                 rc = 0;
 812                         }
 813                         break;
 814                 case CAPACITY_NO_CARTRIDGE:
 815                         /*
 816                          * This is a KERN_ERR so it appears on screen
 817                          * for the user to see
 818                          */
 819                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 820                         break;
 821                 case CAPACITY_INVALID:
 822                         printk(KERN_ERR "%s: Invalid capacity for disk "
 823                                 "in drive\n", drive->name);
 824                         break;
 825                 }
 826                 debug_log("Descriptor 0 Code: %d\n",
 827                           pc.buf[desc_start + 4] & 0x03);
 828         }
 829
 830         /* Clik! disk does not support get_flexible_disk_page */
 831         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 832                 (void) ide_floppy_get_flexible_disk_page(drive);
 833
 834         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 835         return rc;
 836 }
 837
 838 /*
 839  * Obtain the list of formattable capacities.
 840  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 841  * descriptors to userland, instead of our own structures.
 842  *
 843  * Userland gives us the following structure:
 844  *
 845  * struct idefloppy_format_capacities {
 846  *      int nformats;
 847  *      struct {
 848  *              int nblocks;
 849  *              int blocksize;
 850  *      } formats[];
 851  * };
 852  *
 853  * userland initializes nformats to the number of allocated formats[] records.
 854  * On exit we set nformats to the number of records we've actually initialized.
 855  */
 856
 857 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 858 {
 859         struct ide_atapi_pc pc;
 860         u8 header_len, desc_cnt;
 861         int i, blocks, length, u_array_size, u_index;
 862         int __user *argp;
 863
 864         if (get_user(u_array_size, arg))
 865                 return (-EFAULT);
 866
 867         if (u_array_size <= 0)
 868                 return (-EINVAL);
 869
 870         idefloppy_create_read_capacity_cmd(&pc);
 871         if (idefloppy_queue_pc_tail(drive, &pc)) {
 872                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 873                 return (-EIO);
 874         }
 875         header_len = pc.buf[3];
 876         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 877
 878         u_index = 0;
 879         argp = arg + 1;
 880
 881         /*
 882          * We always skip the first capacity descriptor.  That's the current
 883          * capacity.  We are interested in the remaining descriptors, the
 884          * formattable capacities.
 885          */
 886         for (i = 1; i < desc_cnt; i++) {
 887                 unsigned int desc_start = 4 + i*8;
 888
 889                 if (u_index >= u_array_size)
 890                         break;  /* User-supplied buffer too small */
 891
 892                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 893                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 894
 895                 if (put_user(blocks, argp))
 896                         return(-EFAULT);
 897                 ++argp;
 898
 899                 if (put_user(length, argp))
 900                         return (-EFAULT);
 901                 ++argp;
 902
 903                 ++u_index;
 904         }
 905
 906         if (put_user(u_index, arg))
 907                 return (-EFAULT);
 908         return (0);
 909 }
 910
 911 /*
 912  * Get ATAPI_FORMAT_UNIT progress indication.
 913  *
 914  * Userland gives a pointer to an int.  The int is set to a progress
 915  * indicator 0-65536, with 65536=100%.
 916  *
 917  * If the drive does not support format progress indication, we just check
 918  * the dsc bit, and return either 0 or 65536.
 919  */
 920
 921 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 922 {
 923         idefloppy_floppy_t *floppy = drive->driver_data;
 924         struct ide_atapi_pc pc;
 925         int progress_indication = 0x10000;
 926
 927         if (floppy->srfp) {
 928                 idefloppy_create_request_sense_cmd(&pc);
 929                 if (idefloppy_queue_pc_tail(drive, &pc))
 930                         return (-EIO);
 931
 932                 if (floppy->sense_key == 2 &&
 933                     floppy->asc == 4 &&
 934                     floppy->ascq == 4)
 935                         progress_indication = floppy->progress_indication;
 936
 937                 /* Else assume format_unit has finished, and we're at 0x10000 */
 938         } else {
 939                 ide_hwif_t *hwif = drive->hwif;
 940                 unsigned long flags;
 941                 u8 stat;
 942
 943                 local_irq_save(flags);
 944                 stat = hwif->tp_ops->read_status(hwif);
 945                 local_irq_restore(flags);
 946
 947                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
 948         }
 949         if (put_user(progress_indication, arg))
 950                 return (-EFAULT);
 951
 952         return (0);
 953 }
 954
 955 static sector_t idefloppy_capacity(ide_drive_t *drive)
 956 {
 957         idefloppy_floppy_t *floppy = drive->driver_data;
 958         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 959
 960         return capacity;
 961 }
 962
 963 /*
 964  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
 965  * results.
 966  */
 967 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
 968 {
 969         u8 gcw[2];
 970         u8 device_type, protocol, removable, drq_type, packet_size;
 971
 972         *((u16 *) &gcw) = id->config;
 973
 974         device_type =  gcw[1] & 0x1F;
 975         removable   = (gcw[0] & 0x80) >> 7;
 976         protocol    = (gcw[1] & 0xC0) >> 6;
 977         drq_type    = (gcw[0] & 0x60) >> 5;
 978         packet_size =  gcw[0] & 0x03;
 979
 980 #ifdef CONFIG_PPC
 981         /* kludge for Apple PowerBook internal zip */
 982         if (device_type == 5 &&
 983             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
 984                 device_type = 0;
 985 #endif
 986
 987         if (protocol != 2)
 988                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
 989                         protocol);
 990         else if (device_type != 0)
 991                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
 992                                 "to floppy\n", device_type);
 993         else if (!removable)
 994                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
 995         else if (drq_type == 3)
 996                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
 997                                 "supported\n", drq_type);
 998         else if (packet_size != 0)
 999                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1000                                 "bytes\n", packet_size);
1001         else
1002                 return 1;
1003         return 0;
1004 }
1005
1006 #ifdef CONFIG_IDE_PROC_FS
1007 static void idefloppy_add_settings(ide_drive_t *drive)
1008 {
1009         idefloppy_floppy_t *floppy = drive->driver_data;
1010
1011         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1012                         &drive->bios_cyl, NULL);
1013         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1014                         &drive->bios_head, NULL);
1015         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1016                         &drive->bios_sect, NULL);
1017         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1018                         &floppy->ticks,  NULL);
1019 }
1020 #else
1021 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1022 #endif
1023
1024 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1025 {
1026         u8 gcw[2];
1027
1028         *((u16 *) &gcw) = drive->id->config;
1029         floppy->pc = floppy->pc_stack;
1030         drive->pc_callback = ide_floppy_callback;
1031
1032         if (((gcw[0] & 0x60) >> 5) == 1)
1033                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1034         /*
1035          * We used to check revisions here. At this point however I'm giving up.
1036          * Just assume they are all broken, its easier.
1037          *
1038          * The actual reason for the workarounds was likely a driver bug after
1039          * all rather than a firmware bug, and the workaround below used to hide
1040          * it. It should be fixed as of version 1.9, but to be on the safe side
1041          * we'll leave the limitation below for the 2.2.x tree.
1042          */
1043         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1044                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1045                 /* This value will be visible in the /proc/ide/hdx/settings */
1046                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1047                 blk_queue_max_sectors(drive->queue, 64);
1048         }
1049
1050         /*
1051          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1052          * nasty clicking noises without it, so please don't remove this.
1053          */
1054         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1055                 blk_queue_max_sectors(drive->queue, 64);
1056                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1057         }
1058
1059         (void) ide_floppy_get_capacity(drive);
1060         idefloppy_add_settings(drive);
1061 }
1062
1063 static void ide_floppy_remove(ide_drive_t *drive)
1064 {
1065         idefloppy_floppy_t *floppy = drive->driver_data;
1066         struct gendisk *g = floppy->disk;
1067
1068         ide_proc_unregister_driver(drive, floppy->driver);
1069
1070         del_gendisk(g);
1071
1072         ide_floppy_put(floppy);
1073 }
1074
1075 static void idefloppy_cleanup_obj(struct kref *kref)
1076 {
1077         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1078         ide_drive_t *drive = floppy->drive;
1079         struct gendisk *g = floppy->disk;
1080
1081         drive->driver_data = NULL;
1082         g->private_data = NULL;
1083         put_disk(g);
1084         kfree(floppy);
1085 }
1086
1087 #ifdef CONFIG_IDE_PROC_FS
1088 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1089                 int count, int *eof, void *data)
1090 {
1091         ide_drive_t*drive = (ide_drive_t *)data;
1092         int len;
1093
1094         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1095         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1096 }
1097
1098 static ide_proc_entry_t idefloppy_proc[] = {
1099         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1100         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1101         { NULL, 0, NULL, NULL }
1102 };
1103 #endif  /* CONFIG_IDE_PROC_FS */
1104
1105 static int ide_floppy_probe(ide_drive_t *);
1106
1107 static ide_driver_t idefloppy_driver = {
1108         .gen_driver = {
1109                 .owner          = THIS_MODULE,
1110                 .name           = "ide-floppy",
1111                 .bus            = &ide_bus_type,
1112         },
1113         .probe                  = ide_floppy_probe,
1114         .remove                 = ide_floppy_remove,
1115         .version                = IDEFLOPPY_VERSION,
1116         .media                  = ide_floppy,
1117         .supports_dsc_overlap   = 0,
1118         .do_request             = idefloppy_do_request,
1119         .end_request            = idefloppy_end_request,
1120         .error                  = __ide_error,
1121 #ifdef CONFIG_IDE_PROC_FS
1122         .proc                   = idefloppy_proc,
1123 #endif
1124 };
1125
1126 static int idefloppy_open(struct inode *inode, struct file *filp)
1127 {
1128         struct gendisk *disk = inode->i_bdev->bd_disk;
1129         struct ide_floppy_obj *floppy;
1130         ide_drive_t *drive;
1131         struct ide_atapi_pc pc;
1132         int ret = 0;
1133
1134         debug_log("Reached %s\n", __func__);
1135
1136         floppy = ide_floppy_get(disk);
1137         if (!floppy)
1138                 return -ENXIO;
1139
1140         drive = floppy->drive;
1141
1142         floppy->openers++;
1143
1144         if (floppy->openers == 1) {
1145                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1146                 /* Just in case */
1147
1148                 idefloppy_init_pc(&pc);
1149                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1150
1151                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1152                         idefloppy_create_start_stop_cmd(&pc, 1);
1153                         (void) idefloppy_queue_pc_tail(drive, &pc);
1154                 }
1155
1156                 if (ide_floppy_get_capacity(drive)
1157                    && (filp->f_flags & O_NDELAY) == 0
1158                     /*
1159                      * Allow O_NDELAY to open a drive without a disk, or with an
1160                      * unreadable disk, so that we can get the format capacity
1161                      * of the drive or begin the format - Sam
1162                      */
1163                     ) {
1164                         ret = -EIO;
1165                         goto out_put_floppy;
1166                 }
1167
1168                 if (floppy->wp && (filp->f_mode & 2)) {
1169                         ret = -EROFS;
1170                         goto out_put_floppy;
1171                 }
1172                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1173                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1174                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1175                         idefloppy_create_prevent_cmd(&pc, 1);
1176                         (void) idefloppy_queue_pc_tail(drive, &pc);
1177                 }
1178                 check_disk_change(inode->i_bdev);
1179         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1180                 ret = -EBUSY;
1181                 goto out_put_floppy;
1182         }
1183         return 0;
1184
1185 out_put_floppy:
1186         floppy->openers--;
1187         ide_floppy_put(floppy);
1188         return ret;
1189 }
1190
1191 static int idefloppy_release(struct inode *inode, struct file *filp)
1192 {
1193         struct gendisk *disk = inode->i_bdev->bd_disk;
1194         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1195         ide_drive_t *drive = floppy->drive;
1196         struct ide_atapi_pc pc;
1197
1198         debug_log("Reached %s\n", __func__);
1199
1200         if (floppy->openers == 1) {
1201                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1202                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1203                         idefloppy_create_prevent_cmd(&pc, 0);
1204                         (void) idefloppy_queue_pc_tail(drive, &pc);
1205                 }
1206
1207                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1208         }
1209
1210         floppy->openers--;
1211
1212         ide_floppy_put(floppy);
1213
1214         return 0;
1215 }
1216
1217 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1218 {
1219         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1220         ide_drive_t *drive = floppy->drive;
1221
1222         geo->heads = drive->bios_head;
1223         geo->sectors = drive->bios_sect;
1224         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1225         return 0;
1226 }
1227
1228 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1229                                unsigned long arg, unsigned int cmd)
1230 {
1231         idefloppy_floppy_t *floppy = drive->driver_data;
1232
1233         if (floppy->openers > 1)
1234                 return -EBUSY;
1235
1236         /* The IOMEGA Clik! Drive doesn't support this command -
1237          * no room for an eject mechanism */
1238         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1239                 int prevent = arg ? 1 : 0;
1240
1241                 if (cmd == CDROMEJECT)
1242                         prevent = 0;
1243
1244                 idefloppy_create_prevent_cmd(pc, prevent);
1245                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1246         }
1247
1248         if (cmd == CDROMEJECT) {
1249                 idefloppy_create_start_stop_cmd(pc, 2);
1250                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1251         }
1252
1253         return 0;
1254 }
1255
1256 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1257                                   int __user *arg)
1258 {
1259         struct ide_atapi_pc pc;
1260         ide_drive_t *drive = floppy->drive;
1261         int blocks, length, flags, err = 0;
1262
1263         if (floppy->openers > 1) {
1264                 /* Don't format if someone is using the disk */
1265                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1266                 return -EBUSY;
1267         }
1268
1269         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1270
1271         /*
1272          * Send ATAPI_FORMAT_UNIT to the drive.
1273          *
1274          * Userland gives us the following structure:
1275          *
1276          * struct idefloppy_format_command {
1277          *        int nblocks;
1278          *        int blocksize;
1279          *        int flags;
1280          *        } ;
1281          *
1282          * flags is a bitmask, currently, the only defined flag is:
1283          *
1284          *        0x01 - verify media after format.
1285          */
1286         if (get_user(blocks, arg) ||
1287                         get_user(length, arg+1) ||
1288                         get_user(flags, arg+2)) {
1289                 err = -EFAULT;
1290                 goto out;
1291         }
1292
1293         (void) idefloppy_get_sfrp_bit(drive);
1294         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1295
1296         if (idefloppy_queue_pc_tail(drive, &pc))
1297                 err = -EIO;
1298
1299 out:
1300         if (err)
1301                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1302         return err;
1303 }
1304
1305
1306 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1307                         unsigned int cmd, unsigned long arg)
1308 {
1309         struct block_device *bdev = inode->i_bdev;
1310         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1311         ide_drive_t *drive = floppy->drive;
1312         struct ide_atapi_pc pc;
1313         void __user *argp = (void __user *)arg;
1314         int err;
1315
1316         switch (cmd) {
1317         case CDROMEJECT:
1318                 /* fall through */
1319         case CDROM_LOCKDOOR:
1320                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1321         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1322                 return 0;
1323         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1324                 return ide_floppy_get_format_capacities(drive, argp);
1325         case IDEFLOPPY_IOCTL_FORMAT_START:
1326                 if (!(file->f_mode & 2))
1327                         return -EPERM;
1328
1329                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1330         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1331                 return idefloppy_get_format_progress(drive, argp);
1332         }
1333
1334         /*
1335          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1336          * and CDROM_SEND_PACKET (legacy) ioctls
1337          */
1338         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1339                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1340                                         bdev->bd_disk, cmd, argp);
1341         else
1342                 err = -ENOTTY;
1343
1344         if (err == -ENOTTY)
1345                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1346
1347         return err;
1348 }
1349
1350 static int idefloppy_media_changed(struct gendisk *disk)
1351 {
1352         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1353         ide_drive_t *drive = floppy->drive;
1354         int ret;
1355
1356         /* do not scan partitions twice if this is a removable device */
1357         if (drive->attach) {
1358                 drive->attach = 0;
1359                 return 0;
1360         }
1361         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1362         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1363         return ret;
1364 }
1365
1366 static int idefloppy_revalidate_disk(struct gendisk *disk)
1367 {
1368         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1369         set_capacity(disk, idefloppy_capacity(floppy->drive));
1370         return 0;
1371 }
1372
1373 static struct block_device_operations idefloppy_ops = {
1374         .owner                  = THIS_MODULE,
1375         .open                   = idefloppy_open,
1376         .release                = idefloppy_release,
1377         .ioctl                  = idefloppy_ioctl,
1378         .getgeo                 = idefloppy_getgeo,
1379         .media_changed          = idefloppy_media_changed,
1380         .revalidate_disk        = idefloppy_revalidate_disk
1381 };
1382
1383 static int ide_floppy_probe(ide_drive_t *drive)
1384 {
1385         idefloppy_floppy_t *floppy;
1386         struct gendisk *g;
1387
1388         if (!strstr("ide-floppy", drive->driver_req))
1389                 goto failed;
1390         if (!drive->present)
1391                 goto failed;
1392         if (drive->media != ide_floppy)
1393                 goto failed;
1394         if (!idefloppy_identify_device(drive, drive->id)) {
1395                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1396                                 " of ide-floppy\n", drive->name);
1397                 goto failed;
1398         }
1399         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1400         if (!floppy) {
1401                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1402                                 " structure\n", drive->name);
1403                 goto failed;
1404         }
1405
1406         g = alloc_disk(1 << PARTN_BITS);
1407         if (!g)
1408                 goto out_free_floppy;
1409
1410         ide_init_disk(g, drive);
1411
1412         ide_proc_register_driver(drive, &idefloppy_driver);
1413
1414         kref_init(&floppy->kref);
1415
1416         floppy->drive = drive;
1417         floppy->driver = &idefloppy_driver;
1418         floppy->disk = g;
1419
1420         g->private_data = &floppy->driver;
1421
1422         drive->driver_data = floppy;
1423
1424         idefloppy_setup(drive, floppy);
1425
1426         g->minors = 1 << PARTN_BITS;
1427         g->driverfs_dev = &drive->gendev;
1428         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1429         g->fops = &idefloppy_ops;
1430         drive->attach = 1;
1431         add_disk(g);
1432         return 0;
1433
1434 out_free_floppy:
1435         kfree(floppy);
1436 failed:
1437         return -ENODEV;
1438 }
1439
1440 static void __exit idefloppy_exit(void)
1441 {
1442         driver_unregister(&idefloppy_driver.gen_driver);
1443 }
1444
1445 static int __init idefloppy_init(void)
1446 {
1447         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1448         return driver_register(&idefloppy_driver.gen_driver);
1449 }
1450
1451 MODULE_ALIAS("ide:*m-floppy*");
1452 module_init(idefloppy_init);
1453 module_exit(idefloppy_exit);
1454 MODULE_LICENSE("GPL");
1455 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1456