drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define DRV_NAME "ide-floppy"
  19
  20 #define IDEFLOPPY_VERSION "1.00"
  21
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/string.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/timer.h>
  28 #include <linux/mm.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/major.h>
  31 #include <linux/errno.h>
  32 #include <linux/genhd.h>
  33 #include <linux/slab.h>
  34 #include <linux/cdrom.h>
  35 #include <linux/ide.h>
  36 #include <linux/hdreg.h>
  37 #include <linux/bitops.h>
  38 #include <linux/mutex.h>
  39 #include <linux/scatterlist.h>
  40
  41 #include <scsi/scsi_ioctl.h>
  42
  43 #include <asm/byteorder.h>
  44 #include <linux/irq.h>
  45 #include <linux/uaccess.h>
  46 #include <linux/io.h>
  47 #include <asm/unaligned.h>
  48
  49 /* define to see debug info */
  50 #define IDEFLOPPY_DEBUG_LOG             0
  51
  52 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  53 #define IDEFLOPPY_DEBUG(fmt, args...)
  54
  55 #if IDEFLOPPY_DEBUG_LOG
  56 #define debug_log(fmt, args...) \
  57         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  58 #else
  59 #define debug_log(fmt, args...) do {} while (0)
  60 #endif
  61
  62
  63 /* Some drives require a longer irq timeout. */
  64 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  65
  66 /*
  67  * After each failed packet command we issue a request sense command and retry
  68  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  69  */
  70 #define IDEFLOPPY_MAX_PC_RETRIES        3
  71
  72 /*
  73  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  74  * bytes.
  75  */
  76 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  77
  78 /*
  79  * In various places in the driver, we need to allocate storage for packet
  80  * commands and requests, which will remain valid while we leave the driver to
  81  * wait for an interrupt or a timeout event.
  82  */
  83 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  84
  85 /* format capacities descriptor codes */
  86 #define CAPACITY_INVALID        0x00
  87 #define CAPACITY_UNFORMATTED    0x01
  88 #define CAPACITY_CURRENT        0x02
  89 #define CAPACITY_NO_CARTRIDGE   0x03
  90
  91 /*
  92  * Most of our global data which we need to save even as we leave the driver
  93  * due to an interrupt or a timer event is stored in a variable of type
  94  * idefloppy_floppy_t, defined below.
  95  */
  96 typedef struct ide_floppy_obj {
  97         ide_drive_t     *drive;
  98         ide_driver_t    *driver;
  99         struct gendisk  *disk;
 100         struct kref     kref;
 101         unsigned int    openers;        /* protected by BKL for now */
 102
 103         /* Current packet command */
 104         struct ide_atapi_pc *pc;
 105         /* Last failed packet command */
 106         struct ide_atapi_pc *failed_pc;
 107         /* Packet command stack */
 108         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 109         /* Next free packet command storage space */
 110         int pc_stack_index;
 111         struct request rq_stack[IDEFLOPPY_PC_STACK];
 112         /* We implement a circular array */
 113         int rq_stack_index;
 114
 115         /* Last error information */
 116         u8 sense_key, asc, ascq;
 117         /* delay this long before sending packet command */
 118         u8 ticks;
 119         int progress_indication;
 120
 121         /* Device information */
 122         /* Current format */
 123         int blocks, block_size, bs_factor;
 124         /* Last format capacity descriptor */
 125         u8 cap_desc[8];
 126         /* Copy of the flexible disk page */
 127         u8 flexible_disk_page[32];
 128         /* Write protect */
 129         int wp;
 130         /* Supports format progress report */
 131         int srfp;
 132 } idefloppy_floppy_t;
 133
 134 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 135
 136 /* Defines for the MODE SENSE command */
 137 #define MODE_SENSE_CURRENT              0x00
 138 #define MODE_SENSE_CHANGEABLE           0x01
 139 #define MODE_SENSE_DEFAULT              0x02
 140 #define MODE_SENSE_SAVED                0x03
 141
 142 /* IOCTLs used in low-level formatting. */
 143 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 144 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 145 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 146 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 147
 148 /* Error code returned in rq->errors to the higher part of the driver. */
 149 #define IDEFLOPPY_ERROR_GENERAL         101
 150
 151 /*
 152  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 153  * See SFF-8070i spec.
 154  */
 155 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 156 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 157
 158 static DEFINE_MUTEX(idefloppy_ref_mutex);
 159
 160 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 161
 162 #define ide_floppy_g(disk) \
 163         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 164
 165 static void idefloppy_cleanup_obj(struct kref *);
 166
 167 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 168 {
 169         struct ide_floppy_obj *floppy = NULL;
 170
 171         mutex_lock(&idefloppy_ref_mutex);
 172         floppy = ide_floppy_g(disk);
 173         if (floppy) {
 174                 if (ide_device_get(floppy->drive))
 175                         floppy = NULL;
 176                 else
 177                         kref_get(&floppy->kref);
 178         }
 179         mutex_unlock(&idefloppy_ref_mutex);
 180         return floppy;
 181 }
 182
 183 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 184 {
 185         ide_drive_t *drive = floppy->drive;
 186
 187         mutex_lock(&idefloppy_ref_mutex);
 188         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 189         ide_device_put(drive);
 190         mutex_unlock(&idefloppy_ref_mutex);
 191 }
 192
 193 /*
 194  * Used to finish servicing a request. For read/write requests, we will call
 195  * ide_end_request to pass to the next buffer.
 196  */
 197 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 198 {
 199         idefloppy_floppy_t *floppy = drive->driver_data;
 200         struct request *rq = HWGROUP(drive)->rq;
 201         int error;
 202
 203         debug_log("Reached %s\n", __func__);
 204
 205         switch (uptodate) {
 206         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 207         case 1: error = 0; break;
 208         default: error = uptodate;
 209         }
 210         if (error)
 211                 floppy->failed_pc = NULL;
 212         /* Why does this happen? */
 213         if (!rq)
 214                 return 0;
 215         if (!blk_special_request(rq)) {
 216                 /* our real local end request function */
 217                 ide_end_request(drive, uptodate, nsecs);
 218                 return 0;
 219         }
 220         rq->errors = error;
 221         /* fixme: need to move this local also */
 222         ide_end_drive_cmd(drive, 0, 0);
 223         return 0;
 224 }
 225
 226 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 227                                   unsigned int bcount, int direction)
 228 {
 229         ide_hwif_t *hwif = drive->hwif;
 230         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
 231         xfer_func_t *xf = direction ? tp_ops->output_data : tp_ops->input_data;
 232         struct scatterlist *sg = pc->sg;
 233         char *buf;
 234         int count, done = 0;
 235
 236         while (bcount) {
 237                 count = min(sg->length - pc->b_count, bcount);
 238                 if (PageHighMem(sg_page(sg))) {
 239                         unsigned long flags;
 240
 241                         local_irq_save(flags);
 242                         buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
 243                         xf(drive, NULL, buf + pc->b_count, count);
 244                         kunmap_atomic(buf - sg->offset, KM_IRQ0);
 245                         local_irq_restore(flags);
 246                 } else {
 247                         buf = sg_virt(sg);
 248                         xf(drive, NULL, buf + pc->b_count, count);
 249                 }
 250                 bcount -= count;
 251                 pc->b_count += count;
 252                 done += count;
 253
 254                 if (pc->b_count == sg->length) {
 255                         if (!--pc->sg_cnt)
 256                                 break;
 257                         pc->sg = sg = sg_next(sg);
 258                         pc->b_count = 0;
 259                 }
 260         }
 261
 262         idefloppy_end_request(drive, 1, done >> 9);
 263
 264         if (bcount) {
 265                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 266                                 drive->name, __func__, bcount);
 267                 ide_pad_transfer(drive, direction, bcount);
 268         }
 269 }
 270
 271 static void idefloppy_update_buffers(ide_drive_t *drive,
 272                                 struct ide_atapi_pc *pc)
 273 {
 274         struct request *rq = pc->rq;
 275         struct bio *bio = rq->bio;
 276
 277         while ((bio = rq->bio) != NULL)
 278                 idefloppy_end_request(drive, 1, 0);
 279 }
 280
 281 /*
 282  * Generate a new packet command request in front of the request queue, before
 283  * the current request so that it will be processed immediately, on the next
 284  * pass through the driver.
 285  */
 286 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 287                 struct request *rq)
 288 {
 289         struct ide_floppy_obj *floppy = drive->driver_data;
 290
 291         blk_rq_init(NULL, rq);
 292         rq->buffer = (char *) pc;
 293         rq->cmd_type = REQ_TYPE_SPECIAL;
 294         rq->cmd_flags |= REQ_PREEMPT;
 295         rq->rq_disk = floppy->disk;
 296         memcpy(rq->cmd, pc->c, 12);
 297         ide_do_drive_cmd(drive, rq);
 298 }
 299
 300 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 301 {
 302         idefloppy_floppy_t *floppy = drive->driver_data;
 303
 304         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 305                 floppy->pc_stack_index = 0;
 306         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 307 }
 308
 309 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 310 {
 311         idefloppy_floppy_t *floppy = drive->driver_data;
 312
 313         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 314                 floppy->rq_stack_index = 0;
 315         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 316 }
 317
 318 static void ide_floppy_callback(ide_drive_t *drive)
 319 {
 320         idefloppy_floppy_t *floppy = drive->driver_data;
 321         struct ide_atapi_pc *pc = floppy->pc;
 322         int uptodate = pc->error ? 0 : 1;
 323
 324         debug_log("Reached %s\n", __func__);
 325
 326         if (floppy->failed_pc == pc)
 327                 floppy->failed_pc = NULL;
 328
 329         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 330             (pc->rq && blk_pc_request(pc->rq)))
 331                 uptodate = 1; /* FIXME */
 332         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 333                 u8 *buf = floppy->pc->buf;
 334
 335                 if (!pc->error) {
 336                         floppy->sense_key = buf[2] & 0x0F;
 337                         floppy->asc = buf[12];
 338                         floppy->ascq = buf[13];
 339                         floppy->progress_indication = buf[15] & 0x80 ?
 340                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 341
 342                         if (floppy->failed_pc)
 343                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
 344
 345                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 346                                   floppy->sense_key, floppy->asc, floppy->ascq);
 347                 } else
 348                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
 349                                         "Aborting request!\n");
 350         }
 351
 352         idefloppy_end_request(drive, uptodate, 0);
 353 }
 354
 355 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 356 {
 357         memset(pc, 0, sizeof(*pc));
 358         pc->buf = pc->pc_buf;
 359         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 360 }
 361
 362 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 363 {
 364         idefloppy_init_pc(pc);
 365         pc->c[0] = GPCMD_REQUEST_SENSE;
 366         pc->c[4] = 255;
 367         pc->req_xfer = 18;
 368 }
 369
 370 /*
 371  * Called when an error was detected during the last packet command. We queue a
 372  * request sense packet command in the head of the request list.
 373  */
 374 static void idefloppy_retry_pc(ide_drive_t *drive)
 375 {
 376         struct ide_atapi_pc *pc;
 377         struct request *rq;
 378
 379         (void)ide_read_error(drive);
 380         pc = idefloppy_next_pc_storage(drive);
 381         rq = idefloppy_next_rq_storage(drive);
 382         idefloppy_create_request_sense_cmd(pc);
 383         idefloppy_queue_pc_head(drive, pc, rq);
 384 }
 385
 386 /* The usual interrupt handler called during a packet command. */
 387 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 388 {
 389         idefloppy_floppy_t *floppy = drive->driver_data;
 390
 391         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
 392                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
 393                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
 394 }
 395
 396 /*
 397  * What we have here is a classic case of a top half / bottom half interrupt
 398  * service routine. In interrupt mode, the device sends an interrupt to signal
 399  * that it is ready to receive a packet. However, we need to delay about 2-3
 400  * ticks before issuing the packet or we gets in trouble.
 401  */
 402 static int idefloppy_transfer_pc(ide_drive_t *drive)
 403 {
 404         idefloppy_floppy_t *floppy = drive->driver_data;
 405
 406         /* Send the actual packet */
 407         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
 408
 409         /* Timeout for the packet command */
 410         return IDEFLOPPY_WAIT_CMD;
 411 }
 412
 413
 414 /*
 415  * Called as an interrupt (or directly). When the device says it's ready for a
 416  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
 417  * transfer_pc.
 418  */
 419 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
 420 {
 421         idefloppy_floppy_t *floppy = drive->driver_data;
 422         struct ide_atapi_pc *pc = floppy->pc;
 423         ide_expiry_t *expiry;
 424         unsigned int timeout;
 425
 426         /*
 427          * The following delay solves a problem with ATAPI Zip 100 drives
 428          * where the Busy flag was apparently being deasserted before the
 429          * unit was ready to receive data. This was happening on a
 430          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 431          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 432          * used until after the packet is moved in about 50 msec.
 433          */
 434         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
 435                 timeout = floppy->ticks;
 436                 expiry = &idefloppy_transfer_pc;
 437         } else {
 438                 timeout = IDEFLOPPY_WAIT_CMD;
 439                 expiry = NULL;
 440         }
 441
 442         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
 443 }
 444
 445 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 446                                     struct ide_atapi_pc *pc)
 447 {
 448         /* supress error messages resulting from Medium not present */
 449         if (floppy->sense_key == 0x02 &&
 450             floppy->asc       == 0x3a &&
 451             floppy->ascq      == 0x00)
 452                 return;
 453
 454         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 455                         "asc = %2x, ascq = %2x\n",
 456                         floppy->drive->name, pc->c[0], floppy->sense_key,
 457                         floppy->asc, floppy->ascq);
 458
 459 }
 460
 461 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 462                 struct ide_atapi_pc *pc)
 463 {
 464         idefloppy_floppy_t *floppy = drive->driver_data;
 465
 466         if (floppy->failed_pc == NULL &&
 467             pc->c[0] != GPCMD_REQUEST_SENSE)
 468                 floppy->failed_pc = pc;
 469         /* Set the current packet command */
 470         floppy->pc = pc;
 471
 472         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 473                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 474                         ide_floppy_report_error(floppy, pc);
 475                 /* Giving up */
 476                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 477
 478                 floppy->failed_pc = NULL;
 479                 drive->pc_callback(drive);
 480                 return ide_stopped;
 481         }
 482
 483         debug_log("Retry number - %d\n", pc->retries);
 484
 485         pc->retries++;
 486
 487         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
 488                             IDEFLOPPY_WAIT_CMD, NULL);
 489 }
 490
 491 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 492 {
 493         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 494
 495         idefloppy_init_pc(pc);
 496         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 497         pc->c[4] = prevent;
 498 }
 499
 500 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 501 {
 502         idefloppy_init_pc(pc);
 503         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 504         pc->c[7] = 255;
 505         pc->c[8] = 255;
 506         pc->req_xfer = 255;
 507 }
 508
 509 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 510                 int l, int flags)
 511 {
 512         idefloppy_init_pc(pc);
 513         pc->c[0] = GPCMD_FORMAT_UNIT;
 514         pc->c[1] = 0x17;
 515
 516         memset(pc->buf, 0, 12);
 517         pc->buf[1] = 0xA2;
 518         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 519
 520         if (flags & 1)                          /* Verify bit on... */
 521                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 522         pc->buf[3] = 8;
 523
 524         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 525         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 526         pc->buf_size = 12;
 527         pc->flags |= PC_FLAG_WRITING;
 528 }
 529
 530 /* A mode sense command is used to "sense" floppy parameters. */
 531 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 532                 u8 page_code, u8 type)
 533 {
 534         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 535
 536         idefloppy_init_pc(pc);
 537         pc->c[0] = GPCMD_MODE_SENSE_10;
 538         pc->c[1] = 0;
 539         pc->c[2] = page_code + (type << 6);
 540
 541         switch (page_code) {
 542         case IDEFLOPPY_CAPABILITIES_PAGE:
 543                 length += 12;
 544                 break;
 545         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 546                 length += 32;
 547                 break;
 548         default:
 549                 printk(KERN_ERR "ide-floppy: unsupported page code "
 550                                 "in create_mode_sense_cmd\n");
 551         }
 552         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 553         pc->req_xfer = length;
 554 }
 555
 556 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 557 {
 558         idefloppy_init_pc(pc);
 559         pc->c[0] = GPCMD_START_STOP_UNIT;
 560         pc->c[4] = start;
 561 }
 562
 563 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 564                                     struct ide_atapi_pc *pc, struct request *rq,
 565                                     unsigned long sector)
 566 {
 567         int block = sector / floppy->bs_factor;
 568         int blocks = rq->nr_sectors / floppy->bs_factor;
 569         int cmd = rq_data_dir(rq);
 570
 571         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 572                 block, blocks);
 573
 574         idefloppy_init_pc(pc);
 575         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 576         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 577         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 578
 579         memcpy(rq->cmd, pc->c, 12);
 580
 581         pc->rq = rq;
 582         pc->b_count = 0;
 583         if (rq->cmd_flags & REQ_RW)
 584                 pc->flags |= PC_FLAG_WRITING;
 585         pc->buf = NULL;
 586         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 587         pc->flags |= PC_FLAG_DMA_OK;
 588 }
 589
 590 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 591                 struct ide_atapi_pc *pc, struct request *rq)
 592 {
 593         idefloppy_init_pc(pc);
 594         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 595         pc->rq = rq;
 596         pc->b_count = 0;
 597         if (rq->data_len && rq_data_dir(rq) == WRITE)
 598                 pc->flags |= PC_FLAG_WRITING;
 599         pc->buf = rq->data;
 600         if (rq->bio)
 601                 pc->flags |= PC_FLAG_DMA_OK;
 602         /*
 603          * possibly problematic, doesn't look like ide-floppy correctly
 604          * handled scattered requests if dma fails...
 605          */
 606         pc->req_xfer = pc->buf_size = rq->data_len;
 607 }
 608
 609 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 610                 struct request *rq, sector_t block_s)
 611 {
 612         idefloppy_floppy_t *floppy = drive->driver_data;
 613         ide_hwif_t *hwif = drive->hwif;
 614         struct ide_atapi_pc *pc;
 615         unsigned long block = (unsigned long)block_s;
 616
 617         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
 618                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
 619                   rq->cmd[0], rq->cmd_type, rq->errors);
 620
 621         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
 622                   __func__, (long)rq->sector, rq->nr_sectors,
 623                   rq->current_nr_sectors);
 624
 625         if (rq->errors >= ERROR_MAX) {
 626                 if (floppy->failed_pc)
 627                         ide_floppy_report_error(floppy, floppy->failed_pc);
 628                 else
 629                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 630                                 drive->name);
 631                 idefloppy_end_request(drive, 0, 0);
 632                 return ide_stopped;
 633         }
 634         if (blk_fs_request(rq)) {
 635                 if (((long)rq->sector % floppy->bs_factor) ||
 636                     (rq->nr_sectors % floppy->bs_factor)) {
 637                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 638                                         drive->name);
 639                         idefloppy_end_request(drive, 0, 0);
 640                         return ide_stopped;
 641                 }
 642                 pc = idefloppy_next_pc_storage(drive);
 643                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 644         } else if (blk_special_request(rq)) {
 645                 pc = (struct ide_atapi_pc *) rq->buffer;
 646         } else if (blk_pc_request(rq)) {
 647                 pc = idefloppy_next_pc_storage(drive);
 648                 idefloppy_blockpc_cmd(floppy, pc, rq);
 649         } else {
 650                 blk_dump_rq_flags(rq,
 651                         "ide-floppy: unsupported command in queue");
 652                 idefloppy_end_request(drive, 0, 0);
 653                 return ide_stopped;
 654         }
 655
 656         ide_init_sg_cmd(drive, rq);
 657         ide_map_sg(drive, rq);
 658
 659         pc->sg = hwif->sg_table;
 660         pc->sg_cnt = hwif->sg_nents;
 661
 662         pc->rq = rq;
 663
 664         return idefloppy_issue_pc(drive, pc);
 665 }
 666
 667 /*
 668  * Add a special packet command request to the tail of the request queue,
 669  * and wait for it to be serviced.
 670  */
 671 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 672 {
 673         struct ide_floppy_obj *floppy = drive->driver_data;
 674         struct request *rq;
 675         int error;
 676
 677         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 678         rq->buffer = (char *) pc;
 679         rq->cmd_type = REQ_TYPE_SPECIAL;
 680         memcpy(rq->cmd, pc->c, 12);
 681         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 682         blk_put_request(rq);
 683
 684         return error;
 685 }
 686
 687 /*
 688  * Look at the flexible disk page parameters. We ignore the CHS capacity
 689  * parameters and use the LBA parameters instead.
 690  */
 691 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 692 {
 693         idefloppy_floppy_t *floppy = drive->driver_data;
 694         struct ide_atapi_pc pc;
 695         u8 *page;
 696         int capacity, lba_capacity;
 697         u16 transfer_rate, sector_size, cyls, rpm;
 698         u8 heads, sectors;
 699
 700         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 701                                         MODE_SENSE_CURRENT);
 702
 703         if (idefloppy_queue_pc_tail(drive, &pc)) {
 704                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 705                                 " parameters\n");
 706                 return 1;
 707         }
 708         floppy->wp = !!(pc.buf[3] & 0x80);
 709         set_disk_ro(floppy->disk, floppy->wp);
 710         page = &pc.buf[8];
 711
 712         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
 713         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
 714         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
 715         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
 716         heads         = pc.buf[8 + 4];
 717         sectors       = pc.buf[8 + 5];
 718
 719         capacity = cyls * heads * sectors * sector_size;
 720
 721         if (memcmp(page, &floppy->flexible_disk_page, 32))
 722                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 723                                 "%d sector size, %d rpm\n",
 724                                 drive->name, capacity / 1024, cyls, heads,
 725                                 sectors, transfer_rate / 8, sector_size, rpm);
 726
 727         memcpy(&floppy->flexible_disk_page, page, 32);
 728         drive->bios_cyl = cyls;
 729         drive->bios_head = heads;
 730         drive->bios_sect = sectors;
 731         lba_capacity = floppy->blocks * floppy->block_size;
 732
 733         if (capacity < lba_capacity) {
 734                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 735                         "bytes, but the drive only handles %d\n",
 736                         drive->name, lba_capacity, capacity);
 737                 floppy->blocks = floppy->block_size ?
 738                         capacity / floppy->block_size : 0;
 739         }
 740         return 0;
 741 }
 742
 743 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 744 {
 745         idefloppy_floppy_t *floppy = drive->driver_data;
 746         struct ide_atapi_pc pc;
 747
 748         floppy->srfp = 0;
 749         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 750                                                  MODE_SENSE_CURRENT);
 751
 752         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 753         if (idefloppy_queue_pc_tail(drive, &pc))
 754                 return 1;
 755
 756         floppy->srfp = pc.buf[8 + 2] & 0x40;
 757         return 0;
 758 }
 759
 760 /*
 761  * Determine if a media is present in the floppy drive, and if so, its LBA
 762  * capacity.
 763  */
 764 static int ide_floppy_get_capacity(ide_drive_t *drive)
 765 {
 766         idefloppy_floppy_t *floppy = drive->driver_data;
 767         struct ide_atapi_pc pc;
 768         u8 *cap_desc;
 769         u8 header_len, desc_cnt;
 770         int i, rc = 1, blocks, length;
 771
 772         drive->bios_cyl = 0;
 773         drive->bios_head = drive->bios_sect = 0;
 774         floppy->blocks = 0;
 775         floppy->bs_factor = 1;
 776         set_capacity(floppy->disk, 0);
 777
 778         idefloppy_create_read_capacity_cmd(&pc);
 779         if (idefloppy_queue_pc_tail(drive, &pc)) {
 780                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 781                 return 1;
 782         }
 783         header_len = pc.buf[3];
 784         cap_desc = &pc.buf[4];
 785         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 786
 787         for (i = 0; i < desc_cnt; i++) {
 788                 unsigned int desc_start = 4 + i*8;
 789
 790                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 791                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 792
 793                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 794                                 i, blocks * length / 1024, blocks, length);
 795
 796                 if (i)
 797                         continue;
 798                 /*
 799                  * the code below is valid only for the 1st descriptor, ie i=0
 800                  */
 801
 802                 switch (pc.buf[desc_start + 4] & 0x03) {
 803                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 804                 case CAPACITY_UNFORMATTED:
 805                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 806                                 /*
 807                                  * If it is not a clik drive, break out
 808                                  * (maintains previous driver behaviour)
 809                                  */
 810                                 break;
 811                 case CAPACITY_CURRENT:
 812                         /* Normal Zip/LS-120 disks */
 813                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 814                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 815                                         "sector size\n", drive->name,
 816                                         blocks * length / 1024, blocks, length);
 817                         memcpy(&floppy->cap_desc, cap_desc, 8);
 818
 819                         if (!length || length % 512) {
 820                                 printk(KERN_NOTICE "%s: %d bytes block size "
 821                                         "not supported\n", drive->name, length);
 822                         } else {
 823                                 floppy->blocks = blocks;
 824                                 floppy->block_size = length;
 825                                 floppy->bs_factor = length / 512;
 826                                 if (floppy->bs_factor != 1)
 827                                         printk(KERN_NOTICE "%s: warning: non "
 828                                                 "512 bytes block size not "
 829                                                 "fully supported\n",
 830                                                 drive->name);
 831                                 rc = 0;
 832                         }
 833                         break;
 834                 case CAPACITY_NO_CARTRIDGE:
 835                         /*
 836                          * This is a KERN_ERR so it appears on screen
 837                          * for the user to see
 838                          */
 839                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
 840                         break;
 841                 case CAPACITY_INVALID:
 842                         printk(KERN_ERR "%s: Invalid capacity for disk "
 843                                 "in drive\n", drive->name);
 844                         break;
 845                 }
 846                 debug_log("Descriptor 0 Code: %d\n",
 847                           pc.buf[desc_start + 4] & 0x03);
 848         }
 849
 850         /* Clik! disk does not support get_flexible_disk_page */
 851         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 852                 (void) ide_floppy_get_flexible_disk_page(drive);
 853
 854         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 855         return rc;
 856 }
 857
 858 /*
 859  * Obtain the list of formattable capacities.
 860  * Very similar to ide_floppy_get_capacity, except that we push the capacity
 861  * descriptors to userland, instead of our own structures.
 862  *
 863  * Userland gives us the following structure:
 864  *
 865  * struct idefloppy_format_capacities {
 866  *      int nformats;
 867  *      struct {
 868  *              int nblocks;
 869  *              int blocksize;
 870  *      } formats[];
 871  * };
 872  *
 873  * userland initializes nformats to the number of allocated formats[] records.
 874  * On exit we set nformats to the number of records we've actually initialized.
 875  */
 876
 877 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 878 {
 879         struct ide_atapi_pc pc;
 880         u8 header_len, desc_cnt;
 881         int i, blocks, length, u_array_size, u_index;
 882         int __user *argp;
 883
 884         if (get_user(u_array_size, arg))
 885                 return -EFAULT;
 886
 887         if (u_array_size <= 0)
 888                 return -EINVAL;
 889
 890         idefloppy_create_read_capacity_cmd(&pc);
 891         if (idefloppy_queue_pc_tail(drive, &pc)) {
 892                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 893                 return -EIO;
 894         }
 895
 896         header_len = pc.buf[3];
 897         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 898
 899         u_index = 0;
 900         argp = arg + 1;
 901
 902         /*
 903          * We always skip the first capacity descriptor.  That's the current
 904          * capacity.  We are interested in the remaining descriptors, the
 905          * formattable capacities.
 906          */
 907         for (i = 1; i < desc_cnt; i++) {
 908                 unsigned int desc_start = 4 + i*8;
 909
 910                 if (u_index >= u_array_size)
 911                         break;  /* User-supplied buffer too small */
 912
 913                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 914                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
 915
 916                 if (put_user(blocks, argp))
 917                         return -EFAULT;
 918
 919                 ++argp;
 920
 921                 if (put_user(length, argp))
 922                         return -EFAULT;
 923
 924                 ++argp;
 925
 926                 ++u_index;
 927         }
 928
 929         if (put_user(u_index, arg))
 930                 return -EFAULT;
 931
 932         return 0;
 933 }
 934
 935 /*
 936  * Get ATAPI_FORMAT_UNIT progress indication.
 937  *
 938  * Userland gives a pointer to an int.  The int is set to a progress
 939  * indicator 0-65536, with 65536=100%.
 940  *
 941  * If the drive does not support format progress indication, we just check
 942  * the dsc bit, and return either 0 or 65536.
 943  */
 944
 945 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 946 {
 947         idefloppy_floppy_t *floppy = drive->driver_data;
 948         struct ide_atapi_pc pc;
 949         int progress_indication = 0x10000;
 950
 951         if (floppy->srfp) {
 952                 idefloppy_create_request_sense_cmd(&pc);
 953                 if (idefloppy_queue_pc_tail(drive, &pc))
 954                         return -EIO;
 955
 956                 if (floppy->sense_key == 2 &&
 957                     floppy->asc == 4 &&
 958                     floppy->ascq == 4)
 959                         progress_indication = floppy->progress_indication;
 960
 961                 /* Else assume format_unit has finished, and we're at 0x10000 */
 962         } else {
 963                 ide_hwif_t *hwif = drive->hwif;
 964                 unsigned long flags;
 965                 u8 stat;
 966
 967                 local_irq_save(flags);
 968                 stat = hwif->tp_ops->read_status(hwif);
 969                 local_irq_restore(flags);
 970
 971                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
 972         }
 973
 974         if (put_user(progress_indication, arg))
 975                 return -EFAULT;
 976
 977         return 0;
 978 }
 979
 980 static sector_t idefloppy_capacity(ide_drive_t *drive)
 981 {
 982         idefloppy_floppy_t *floppy = drive->driver_data;
 983         unsigned long capacity = floppy->blocks * floppy->bs_factor;
 984
 985         return capacity;
 986 }
 987
 988 #ifdef CONFIG_IDE_PROC_FS
 989 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
 990 ide_devset_rw(bios_head, 0,  255, bios_head);
 991 ide_devset_rw(bios_sect, 0,   63, bios_sect);
 992
 993 static int get_ticks(ide_drive_t *drive)
 994 {
 995         idefloppy_floppy_t *floppy = drive->driver_data;
 996         return floppy->ticks;
 997 }
 998
 999 static int set_ticks(ide_drive_t *drive, int arg)
1000 {
1001         idefloppy_floppy_t *floppy = drive->driver_data;
1002         floppy->ticks = arg;
1003         return 0;
1004 }
1005
1006 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
1007
1008 static const struct ide_devset *idefloppy_settings[] = {
1009         &ide_devset_bios_cyl,
1010         &ide_devset_bios_head,
1011         &ide_devset_bios_sect,
1012         &ide_devset_ticks,
1013         NULL
1014 };
1015 #endif
1016
1017 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1018 {
1019         u16 *id = drive->id;
1020         u8 gcw[2];
1021
1022         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
1023         floppy->pc = floppy->pc_stack;
1024         drive->pc_callback = ide_floppy_callback;
1025
1026         if (((gcw[0] & 0x60) >> 5) == 1)
1027                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1028         /*
1029          * We used to check revisions here. At this point however I'm giving up.
1030          * Just assume they are all broken, its easier.
1031          *
1032          * The actual reason for the workarounds was likely a driver bug after
1033          * all rather than a firmware bug, and the workaround below used to hide
1034          * it. It should be fixed as of version 1.9, but to be on the safe side
1035          * we'll leave the limitation below for the 2.2.x tree.
1036          */
1037         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
1038                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1039                 /* This value will be visible in the /proc/ide/hdx/settings */
1040                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1041                 blk_queue_max_sectors(drive->queue, 64);
1042         }
1043
1044         /*
1045          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1046          * nasty clicking noises without it, so please don't remove this.
1047          */
1048         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
1049                 blk_queue_max_sectors(drive->queue, 64);
1050                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1051         }
1052
1053         (void) ide_floppy_get_capacity(drive);
1054
1055         ide_proc_register_driver(drive, floppy->driver);
1056 }
1057
1058 static void ide_floppy_remove(ide_drive_t *drive)
1059 {
1060         idefloppy_floppy_t *floppy = drive->driver_data;
1061         struct gendisk *g = floppy->disk;
1062
1063         ide_proc_unregister_driver(drive, floppy->driver);
1064
1065         del_gendisk(g);
1066
1067         ide_floppy_put(floppy);
1068 }
1069
1070 static void idefloppy_cleanup_obj(struct kref *kref)
1071 {
1072         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1073         ide_drive_t *drive = floppy->drive;
1074         struct gendisk *g = floppy->disk;
1075
1076         drive->driver_data = NULL;
1077         g->private_data = NULL;
1078         put_disk(g);
1079         kfree(floppy);
1080 }
1081
1082 #ifdef CONFIG_IDE_PROC_FS
1083 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1084                 int count, int *eof, void *data)
1085 {
1086         ide_drive_t*drive = (ide_drive_t *)data;
1087         int len;
1088
1089         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1090         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1091 }
1092
1093 static ide_proc_entry_t idefloppy_proc[] = {
1094         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1095         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1096         { NULL, 0, NULL, NULL }
1097 };
1098 #endif  /* CONFIG_IDE_PROC_FS */
1099
1100 static int ide_floppy_probe(ide_drive_t *);
1101
1102 static ide_driver_t idefloppy_driver = {
1103         .gen_driver = {
1104                 .owner          = THIS_MODULE,
1105                 .name           = "ide-floppy",
1106                 .bus            = &ide_bus_type,
1107         },
1108         .probe                  = ide_floppy_probe,
1109         .remove                 = ide_floppy_remove,
1110         .version                = IDEFLOPPY_VERSION,
1111         .media                  = ide_floppy,
1112         .do_request             = idefloppy_do_request,
1113         .end_request            = idefloppy_end_request,
1114         .error                  = __ide_error,
1115 #ifdef CONFIG_IDE_PROC_FS
1116         .proc                   = idefloppy_proc,
1117         .settings               = idefloppy_settings,
1118 #endif
1119 };
1120
1121 static int idefloppy_open(struct inode *inode, struct file *filp)
1122 {
1123         struct gendisk *disk = inode->i_bdev->bd_disk;
1124         struct ide_floppy_obj *floppy;
1125         ide_drive_t *drive;
1126         struct ide_atapi_pc pc;
1127         int ret = 0;
1128
1129         debug_log("Reached %s\n", __func__);
1130
1131         floppy = ide_floppy_get(disk);
1132         if (!floppy)
1133                 return -ENXIO;
1134
1135         drive = floppy->drive;
1136
1137         floppy->openers++;
1138
1139         if (floppy->openers == 1) {
1140                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1141                 /* Just in case */
1142
1143                 idefloppy_init_pc(&pc);
1144                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1145
1146                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1147                         idefloppy_create_start_stop_cmd(&pc, 1);
1148                         (void) idefloppy_queue_pc_tail(drive, &pc);
1149                 }
1150
1151                 if (ide_floppy_get_capacity(drive)
1152                    && (filp->f_flags & O_NDELAY) == 0
1153                     /*
1154                      * Allow O_NDELAY to open a drive without a disk, or with an
1155                      * unreadable disk, so that we can get the format capacity
1156                      * of the drive or begin the format - Sam
1157                      */
1158                     ) {
1159                         ret = -EIO;
1160                         goto out_put_floppy;
1161                 }
1162
1163                 if (floppy->wp && (filp->f_mode & 2)) {
1164                         ret = -EROFS;
1165                         goto out_put_floppy;
1166                 }
1167                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1168                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1169                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1170                         idefloppy_create_prevent_cmd(&pc, 1);
1171                         (void) idefloppy_queue_pc_tail(drive, &pc);
1172                 }
1173                 check_disk_change(inode->i_bdev);
1174         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1175                 ret = -EBUSY;
1176                 goto out_put_floppy;
1177         }
1178         return 0;
1179
1180 out_put_floppy:
1181         floppy->openers--;
1182         ide_floppy_put(floppy);
1183         return ret;
1184 }
1185
1186 static int idefloppy_release(struct inode *inode, struct file *filp)
1187 {
1188         struct gendisk *disk = inode->i_bdev->bd_disk;
1189         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1190         ide_drive_t *drive = floppy->drive;
1191         struct ide_atapi_pc pc;
1192
1193         debug_log("Reached %s\n", __func__);
1194
1195         if (floppy->openers == 1) {
1196                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1197                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1198                         idefloppy_create_prevent_cmd(&pc, 0);
1199                         (void) idefloppy_queue_pc_tail(drive, &pc);
1200                 }
1201
1202                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1203         }
1204
1205         floppy->openers--;
1206
1207         ide_floppy_put(floppy);
1208
1209         return 0;
1210 }
1211
1212 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1213 {
1214         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1215         ide_drive_t *drive = floppy->drive;
1216
1217         geo->heads = drive->bios_head;
1218         geo->sectors = drive->bios_sect;
1219         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1220         return 0;
1221 }
1222
1223 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1224                                unsigned long arg, unsigned int cmd)
1225 {
1226         idefloppy_floppy_t *floppy = drive->driver_data;
1227
1228         if (floppy->openers > 1)
1229                 return -EBUSY;
1230
1231         /* The IOMEGA Clik! Drive doesn't support this command -
1232          * no room for an eject mechanism */
1233         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1234                 int prevent = arg ? 1 : 0;
1235
1236                 if (cmd == CDROMEJECT)
1237                         prevent = 0;
1238
1239                 idefloppy_create_prevent_cmd(pc, prevent);
1240                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1241         }
1242
1243         if (cmd == CDROMEJECT) {
1244                 idefloppy_create_start_stop_cmd(pc, 2);
1245                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1246         }
1247
1248         return 0;
1249 }
1250
1251 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1252 {
1253         idefloppy_floppy_t *floppy = drive->driver_data;
1254         struct ide_atapi_pc pc;
1255         int blocks, length, flags, err = 0;
1256
1257         if (floppy->openers > 1) {
1258                 /* Don't format if someone is using the disk */
1259                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1260                 return -EBUSY;
1261         }
1262
1263         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1264
1265         /*
1266          * Send ATAPI_FORMAT_UNIT to the drive.
1267          *
1268          * Userland gives us the following structure:
1269          *
1270          * struct idefloppy_format_command {
1271          *        int nblocks;
1272          *        int blocksize;
1273          *        int flags;
1274          *        } ;
1275          *
1276          * flags is a bitmask, currently, the only defined flag is:
1277          *
1278          *        0x01 - verify media after format.
1279          */
1280         if (get_user(blocks, arg) ||
1281                         get_user(length, arg+1) ||
1282                         get_user(flags, arg+2)) {
1283                 err = -EFAULT;
1284                 goto out;
1285         }
1286
1287         (void) idefloppy_get_sfrp_bit(drive);
1288         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1289
1290         if (idefloppy_queue_pc_tail(drive, &pc))
1291                 err = -EIO;
1292
1293 out:
1294         if (err)
1295                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1296         return err;
1297 }
1298
1299 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1300                                    unsigned int cmd, void __user *argp)
1301 {
1302         switch (cmd) {
1303         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1304                 return 0;
1305         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1306                 return ide_floppy_get_format_capacities(drive, argp);
1307         case IDEFLOPPY_IOCTL_FORMAT_START:
1308                 if (!(file->f_mode & 2))
1309                         return -EPERM;
1310                 return ide_floppy_format_unit(drive, (int __user *)argp);
1311         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1312                 return ide_floppy_get_format_progress(drive, argp);
1313         default:
1314                 return -ENOTTY;
1315         }
1316 }
1317
1318 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1319                         unsigned int cmd, unsigned long arg)
1320 {
1321         struct block_device *bdev = inode->i_bdev;
1322         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1323         ide_drive_t *drive = floppy->drive;
1324         struct ide_atapi_pc pc;
1325         void __user *argp = (void __user *)arg;
1326         int err;
1327
1328         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1329                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1330
1331         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1332         if (err != -ENOTTY)
1333                 return err;
1334
1335         /*
1336          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1337          * and CDROM_SEND_PACKET (legacy) ioctls
1338          */
1339         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1340                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1341                                         bdev->bd_disk, cmd, argp);
1342
1343         if (err == -ENOTTY)
1344                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1345
1346         return err;
1347 }
1348
1349 static int idefloppy_media_changed(struct gendisk *disk)
1350 {
1351         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1352         ide_drive_t *drive = floppy->drive;
1353         int ret;
1354
1355         /* do not scan partitions twice if this is a removable device */
1356         if (drive->attach) {
1357                 drive->attach = 0;
1358                 return 0;
1359         }
1360         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1361         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1362         return ret;
1363 }
1364
1365 static int idefloppy_revalidate_disk(struct gendisk *disk)
1366 {
1367         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1368         set_capacity(disk, idefloppy_capacity(floppy->drive));
1369         return 0;
1370 }
1371
1372 static struct block_device_operations idefloppy_ops = {
1373         .owner                  = THIS_MODULE,
1374         .open                   = idefloppy_open,
1375         .release                = idefloppy_release,
1376         .ioctl                  = idefloppy_ioctl,
1377         .getgeo                 = idefloppy_getgeo,
1378         .media_changed          = idefloppy_media_changed,
1379         .revalidate_disk        = idefloppy_revalidate_disk
1380 };
1381
1382 static int ide_floppy_probe(ide_drive_t *drive)
1383 {
1384         idefloppy_floppy_t *floppy;
1385         struct gendisk *g;
1386
1387         if (!strstr("ide-floppy", drive->driver_req))
1388                 goto failed;
1389
1390         if (drive->media != ide_floppy)
1391                 goto failed;
1392
1393         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1394                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1395                                 " of ide-floppy\n", drive->name);
1396                 goto failed;
1397         }
1398         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1399         if (!floppy) {
1400                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1401                                 " structure\n", drive->name);
1402                 goto failed;
1403         }
1404
1405         g = alloc_disk(1 << PARTN_BITS);
1406         if (!g)
1407                 goto out_free_floppy;
1408
1409         ide_init_disk(g, drive);
1410
1411         kref_init(&floppy->kref);
1412
1413         floppy->drive = drive;
1414         floppy->driver = &idefloppy_driver;
1415         floppy->disk = g;
1416
1417         g->private_data = &floppy->driver;
1418
1419         drive->driver_data = floppy;
1420
1421         idefloppy_setup(drive, floppy);
1422
1423         g->minors = 1 << PARTN_BITS;
1424         g->driverfs_dev = &drive->gendev;
1425         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1426         g->fops = &idefloppy_ops;
1427         drive->attach = 1;
1428         add_disk(g);
1429         return 0;
1430
1431 out_free_floppy:
1432         kfree(floppy);
1433 failed:
1434         return -ENODEV;
1435 }
1436
1437 static void __exit idefloppy_exit(void)
1438 {
1439         driver_unregister(&idefloppy_driver.gen_driver);
1440 }
1441
1442 static int __init idefloppy_init(void)
1443 {
1444         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1445         return driver_register(&idefloppy_driver.gen_driver);
1446 }
1447
1448 MODULE_ALIAS("ide:*m-floppy*");
1449 module_init(idefloppy_init);
1450 module_exit(idefloppy_exit);
1451 MODULE_LICENSE("GPL");
1452 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1453