drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define IDEFLOPPY_VERSION "1.00"
  19
  20 #include <linux/module.h>
  21 #include <linux/types.h>
  22 #include <linux/string.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/timer.h>
  26 #include <linux/mm.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/major.h>
  29 #include <linux/errno.h>
  30 #include <linux/genhd.h>
  31 #include <linux/slab.h>
  32 #include <linux/cdrom.h>
  33 #include <linux/ide.h>
  34 #include <linux/bitops.h>
  35 #include <linux/mutex.h>
  36
  37 #include <scsi/scsi_ioctl.h>
  38
  39 #include <asm/byteorder.h>
  40 #include <linux/irq.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/io.h>
  43 #include <asm/unaligned.h>
  44
  45 /* define to see debug info */
  46 #define IDEFLOPPY_DEBUG_LOG             0
  47
  48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  49 #define IDEFLOPPY_DEBUG(fmt, args...)
  50
  51 #if IDEFLOPPY_DEBUG_LOG
  52 #define debug_log(fmt, args...) \
  53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  54 #else
  55 #define debug_log(fmt, args...) do {} while (0)
  56 #endif
  57
  58
  59 /* Some drives require a longer irq timeout. */
  60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  61
  62 /*
  63  * After each failed packet command we issue a request sense command and retry
  64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  65  */
  66 #define IDEFLOPPY_MAX_PC_RETRIES        3
  67
  68 /*
  69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  70  * bytes.
  71  */
  72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  73
  74 /*
  75  * In various places in the driver, we need to allocate storage for packet
  76  * commands and requests, which will remain valid while we leave the driver to
  77  * wait for an interrupt or a timeout event.
  78  */
  79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  80
  81 /* format capacities descriptor codes */
  82 #define CAPACITY_INVALID        0x00
  83 #define CAPACITY_UNFORMATTED    0x01
  84 #define CAPACITY_CURRENT        0x02
  85 #define CAPACITY_NO_CARTRIDGE   0x03
  86
  87 /*
  88  * Most of our global data which we need to save even as we leave the driver
  89  * due to an interrupt or a timer event is stored in a variable of type
  90  * idefloppy_floppy_t, defined below.
  91  */
  92 typedef struct ide_floppy_obj {
  93         ide_drive_t     *drive;
  94         ide_driver_t    *driver;
  95         struct gendisk  *disk;
  96         struct kref     kref;
  97         unsigned int    openers;        /* protected by BKL for now */
  98
  99         /* Current packet command */
 100         struct ide_atapi_pc *pc;
 101         /* Last failed packet command */
 102         struct ide_atapi_pc *failed_pc;
 103         /* Packet command stack */
 104         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 105         /* Next free packet command storage space */
 106         int pc_stack_index;
 107         struct request rq_stack[IDEFLOPPY_PC_STACK];
 108         /* We implement a circular array */
 109         int rq_stack_index;
 110
 111         /* Last error information */
 112         u8 sense_key, asc, ascq;
 113         /* delay this long before sending packet command */
 114         u8 ticks;
 115         int progress_indication;
 116
 117         /* Device information */
 118         /* Current format */
 119         int blocks, block_size, bs_factor;
 120         /* Last format capacity descriptor */
 121         u8 cap_desc[8];
 122         /* Copy of the flexible disk page */
 123         u8 flexible_disk_page[32];
 124         /* Write protect */
 125         int wp;
 126         /* Supports format progress report */
 127         int srfp;
 128         /* Status/Action flags */
 129         unsigned long flags;
 130 } idefloppy_floppy_t;
 131
 132 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 133
 134 /* Floppy flag bits values. */
 135 enum {
 136         /* DRQ interrupt device */
 137         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
 138         /* Media may have changed */
 139         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
 140         /* Format in progress */
 141         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
 142         /* Avoid commands not supported in Clik drive */
 143         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
 144         /* Requires BH algorithm for packets */
 145         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
 146 };
 147
 148 /* Defines for the MODE SENSE command */
 149 #define MODE_SENSE_CURRENT              0x00
 150 #define MODE_SENSE_CHANGEABLE           0x01
 151 #define MODE_SENSE_DEFAULT              0x02
 152 #define MODE_SENSE_SAVED                0x03
 153
 154 /* IOCTLs used in low-level formatting. */
 155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 157 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 159
 160 /* Error code returned in rq->errors to the higher part of the driver. */
 161 #define IDEFLOPPY_ERROR_GENERAL         101
 162
 163 /*
 164  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 165  * See SFF-8070i spec.
 166  */
 167 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 169
 170 static DEFINE_MUTEX(idefloppy_ref_mutex);
 171
 172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 173
 174 #define ide_floppy_g(disk) \
 175         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 176
 177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 178 {
 179         struct ide_floppy_obj *floppy = NULL;
 180
 181         mutex_lock(&idefloppy_ref_mutex);
 182         floppy = ide_floppy_g(disk);
 183         if (floppy)
 184                 kref_get(&floppy->kref);
 185         mutex_unlock(&idefloppy_ref_mutex);
 186         return floppy;
 187 }
 188
 189 static void idefloppy_cleanup_obj(struct kref *);
 190
 191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 192 {
 193         mutex_lock(&idefloppy_ref_mutex);
 194         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 195         mutex_unlock(&idefloppy_ref_mutex);
 196 }
 197
 198 /*
 199  * Used to finish servicing a request. For read/write requests, we will call
 200  * ide_end_request to pass to the next buffer.
 201  */
 202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 203 {
 204         idefloppy_floppy_t *floppy = drive->driver_data;
 205         struct request *rq = HWGROUP(drive)->rq;
 206         int error;
 207
 208         debug_log("Reached %s\n", __func__);
 209
 210         switch (uptodate) {
 211         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 212         case 1: error = 0; break;
 213         default: error = uptodate;
 214         }
 215         if (error)
 216                 floppy->failed_pc = NULL;
 217         /* Why does this happen? */
 218         if (!rq)
 219                 return 0;
 220         if (!blk_special_request(rq)) {
 221                 /* our real local end request function */
 222                 ide_end_request(drive, uptodate, nsecs);
 223                 return 0;
 224         }
 225         rq->errors = error;
 226         /* fixme: need to move this local also */
 227         ide_end_drive_cmd(drive, 0, 0);
 228         return 0;
 229 }
 230
 231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 232                                   unsigned int bcount, int direction)
 233 {
 234         ide_hwif_t *hwif = drive->hwif;
 235         struct request *rq = pc->rq;
 236         struct req_iterator iter;
 237         struct bio_vec *bvec;
 238         unsigned long flags;
 239         int count, done = 0;
 240         char *data;
 241
 242         rq_for_each_segment(bvec, rq, iter) {
 243                 if (!bcount)
 244                         break;
 245
 246                 count = min(bvec->bv_len, bcount);
 247
 248                 data = bvec_kmap_irq(bvec, &flags);
 249                 if (direction)
 250                         hwif->output_data(drive, NULL, data, count);
 251                 else
 252                         hwif->input_data(drive, NULL, data, count);
 253                 bvec_kunmap_irq(data, &flags);
 254
 255                 bcount -= count;
 256                 pc->b_count += count;
 257                 done += count;
 258         }
 259
 260         idefloppy_end_request(drive, 1, done >> 9);
 261
 262         if (bcount) {
 263                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 264                                 drive->name, __func__, bcount);
 265                 ide_pad_transfer(drive, direction, bcount);
 266         }
 267 }
 268
 269 static void idefloppy_update_buffers(ide_drive_t *drive,
 270                                 struct ide_atapi_pc *pc)
 271 {
 272         struct request *rq = pc->rq;
 273         struct bio *bio = rq->bio;
 274
 275         while ((bio = rq->bio) != NULL)
 276                 idefloppy_end_request(drive, 1, 0);
 277 }
 278
 279 /*
 280  * Generate a new packet command request in front of the request queue, before
 281  * the current request so that it will be processed immediately, on the next
 282  * pass through the driver.
 283  */
 284 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 285                 struct request *rq)
 286 {
 287         struct ide_floppy_obj *floppy = drive->driver_data;
 288
 289         blk_rq_init(NULL, rq);
 290         rq->buffer = (char *) pc;
 291         rq->cmd_type = REQ_TYPE_SPECIAL;
 292         rq->cmd_flags |= REQ_PREEMPT;
 293         rq->rq_disk = floppy->disk;
 294         ide_do_drive_cmd(drive, rq);
 295 }
 296
 297 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 298 {
 299         idefloppy_floppy_t *floppy = drive->driver_data;
 300
 301         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 302                 floppy->pc_stack_index = 0;
 303         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 304 }
 305
 306 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 307 {
 308         idefloppy_floppy_t *floppy = drive->driver_data;
 309
 310         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 311                 floppy->rq_stack_index = 0;
 312         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 313 }
 314
 315 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 316 {
 317         idefloppy_floppy_t *floppy = drive->driver_data;
 318         u8 *buf = floppy->pc->buf;
 319
 320         debug_log("Reached %s\n", __func__);
 321
 322         if (!floppy->pc->error) {
 323                 floppy->sense_key = buf[2] & 0x0F;
 324                 floppy->asc = buf[12];
 325                 floppy->ascq = buf[13];
 326                 floppy->progress_indication = buf[15] & 0x80 ?
 327                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 328
 329                 if (floppy->failed_pc)
 330                         debug_log("pc = %x, sense key = %x, asc = %x,"
 331                                         " ascq = %x\n",
 332                                         floppy->failed_pc->c[0],
 333                                         floppy->sense_key,
 334                                         floppy->asc,
 335                                         floppy->ascq);
 336                 else
 337                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 338                                         floppy->sense_key,
 339                                         floppy->asc,
 340                                         floppy->ascq);
 341
 342
 343                 idefloppy_end_request(drive, 1, 0);
 344         } else {
 345                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 346                                 " request!\n");
 347                 idefloppy_end_request(drive, 0, 0);
 348         }
 349 }
 350
 351 /* General packet command callback function. */
 352 static void idefloppy_pc_callback(ide_drive_t *drive)
 353 {
 354         idefloppy_floppy_t *floppy = drive->driver_data;
 355
 356         debug_log("Reached %s\n", __func__);
 357
 358         idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 359 }
 360
 361 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 362 {
 363         memset(pc->c, 0, 12);
 364         pc->retries = 0;
 365         pc->flags = 0;
 366         pc->req_xfer = 0;
 367         pc->buf = pc->pc_buf;
 368         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 369         pc->idefloppy_callback = &idefloppy_pc_callback;
 370 }
 371
 372 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 373 {
 374         idefloppy_init_pc(pc);
 375         pc->c[0] = GPCMD_REQUEST_SENSE;
 376         pc->c[4] = 255;
 377         pc->req_xfer = 18;
 378         pc->idefloppy_callback = &idefloppy_request_sense_callback;
 379 }
 380
 381 /*
 382  * Called when an error was detected during the last packet command. We queue a
 383  * request sense packet command in the head of the request list.
 384  */
 385 static void idefloppy_retry_pc(ide_drive_t *drive)
 386 {
 387         struct ide_atapi_pc *pc;
 388         struct request *rq;
 389
 390         (void)ide_read_error(drive);
 391         pc = idefloppy_next_pc_storage(drive);
 392         rq = idefloppy_next_rq_storage(drive);
 393         idefloppy_create_request_sense_cmd(pc);
 394         idefloppy_queue_pc_head(drive, pc, rq);
 395 }
 396
 397 /* The usual interrupt handler called during a packet command. */
 398 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 399 {
 400         idefloppy_floppy_t *floppy = drive->driver_data;
 401         ide_hwif_t *hwif = drive->hwif;
 402         struct ide_atapi_pc *pc = floppy->pc;
 403         struct request *rq = pc->rq;
 404         xfer_func_t *xferfunc;
 405         unsigned int temp;
 406         int dma_error = 0;
 407         u16 bcount;
 408         u8 stat, ireason;
 409
 410         debug_log("Reached %s interrupt handler\n", __func__);
 411
 412         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 413                 dma_error = hwif->dma_ops->dma_end(drive);
 414                 if (dma_error) {
 415                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 416                                         rq_data_dir(rq) ? "write" : "read");
 417                         pc->flags |= PC_FLAG_DMA_ERROR;
 418                 } else {
 419                         pc->xferred = pc->req_xfer;
 420                         idefloppy_update_buffers(drive, pc);
 421                 }
 422                 debug_log("DMA finished\n");
 423         }
 424
 425         /* Clear the interrupt */
 426         stat = ide_read_status(drive);
 427
 428         /* No more interrupts */
 429         if ((stat & DRQ_STAT) == 0) {
 430                 debug_log("Packet command completed, %d bytes transferred\n",
 431                                 pc->xferred);
 432                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 433
 434                 local_irq_enable_in_hardirq();
 435
 436                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 437                         /* Error detected */
 438                         debug_log("%s: I/O error\n", drive->name);
 439                         rq->errors++;
 440                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 441                                 printk(KERN_ERR "%s: I/O error in request sense"
 442                                                 " command\n", drive->name);
 443                                 return ide_do_reset(drive);
 444                         }
 445                         /* Retry operation */
 446                         idefloppy_retry_pc(drive);
 447                         /* queued, but not started */
 448                         return ide_stopped;
 449                 }
 450                 pc->error = 0;
 451                 if (floppy->failed_pc == pc)
 452                         floppy->failed_pc = NULL;
 453                 /* Command finished - Call the callback function */
 454                 pc->idefloppy_callback(drive);
 455                 return ide_stopped;
 456         }
 457
 458         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 459                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 460                 printk(KERN_ERR "%s: The device wants to issue more interrupts "
 461                                 "in DMA mode\n", drive->name);
 462                 ide_dma_off(drive);
 463                 return ide_do_reset(drive);
 464         }
 465
 466         /* Get the number of bytes to transfer */
 467         bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
 468                   hwif->INB(hwif->io_ports.lbam_addr);
 469         /* on this interrupt */
 470         ireason = hwif->INB(hwif->io_ports.nsect_addr);
 471
 472         if (ireason & CD) {
 473                 printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
 474                 return ide_do_reset(drive);
 475         }
 476         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 477                 /* Hopefully, we will never get here */
 478                 printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
 479                                 "to %s!\n", drive->name,
 480                                 (ireason & IO) ? "Write" : "Read",
 481                                 (ireason & IO) ? "Read" : "Write");
 482                 return ide_do_reset(drive);
 483         }
 484         if (!(pc->flags & PC_FLAG_WRITING)) {
 485                 /* Reading - Check that we have enough space */
 486                 temp = pc->xferred + bcount;
 487                 if (temp > pc->req_xfer) {
 488                         if (temp > pc->buf_size) {
 489                                 printk(KERN_ERR "%s: The device wants to send "
 490                                                 "us more data than expected - "
 491                                                 "discarding data\n",
 492                                                 drive->name);
 493                                 ide_pad_transfer(drive, 0, bcount);
 494
 495                                 ide_set_handler(drive,
 496                                                 &idefloppy_pc_intr,
 497                                                 IDEFLOPPY_WAIT_CMD,
 498                                                 NULL);
 499                                 return ide_started;
 500                         }
 501                         debug_log("The device wants to send us more data than "
 502                                   "expected - allowing transfer\n");
 503                 }
 504         }
 505         if (pc->flags & PC_FLAG_WRITING)
 506                 xferfunc = hwif->output_data;
 507         else
 508                 xferfunc = hwif->input_data;
 509
 510         if (pc->buf)
 511                 xferfunc(drive, NULL, pc->cur_pos, bcount);
 512         else
 513                 ide_floppy_io_buffers(drive, pc, bcount,
 514                                       !!(pc->flags & PC_FLAG_WRITING));
 515
 516         /* Update the current position */
 517         pc->xferred += bcount;
 518         pc->cur_pos += bcount;
 519
 520         /* And set the interrupt handler again */
 521         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 522         return ide_started;
 523 }
 524
 525 /*
 526  * What we have here is a classic case of a top half / bottom half interrupt
 527  * service routine. In interrupt mode, the device sends an interrupt to signal
 528  * that it is ready to receive a packet. However, we need to delay about 2-3
 529  * ticks before issuing the packet or we gets in trouble.
 530  *
 531  * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
 532  * In either case, when the device says it's ready for a packet, we schedule
 533  * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
 534  */
 535 static int idefloppy_transfer_pc2(ide_drive_t *drive)
 536 {
 537         idefloppy_floppy_t *floppy = drive->driver_data;
 538
 539         /* Send the actual packet */
 540         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
 541
 542         /* Timeout for the packet command */
 543         return IDEFLOPPY_WAIT_CMD;
 544 }
 545
 546 static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 547 {
 548         ide_hwif_t *hwif = drive->hwif;
 549         idefloppy_floppy_t *floppy = drive->driver_data;
 550         ide_expiry_t *expiry;
 551         unsigned int timeout;
 552         ide_startstop_t startstop;
 553         u8 ireason;
 554
 555         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 556                 printk(KERN_ERR "%s: Strange, packet command initiated yet "
 557                                 "DRQ isn't asserted\n", drive->name);
 558                 return startstop;
 559         }
 560         ireason = hwif->INB(hwif->io_ports.nsect_addr);
 561         if ((ireason & CD) == 0 || (ireason & IO)) {
 562                 printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
 563                                 "a packet command\n", drive->name);
 564                 return ide_do_reset(drive);
 565         }
 566         /*
 567          * The following delay solves a problem with ATAPI Zip 100 drives
 568          * where the Busy flag was apparently being deasserted before the
 569          * unit was ready to receive data. This was happening on a
 570          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 571          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 572          * used until after the packet is moved in about 50 msec.
 573          */
 574         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
 575                 timeout = floppy->ticks;
 576                 expiry = &idefloppy_transfer_pc2;
 577         } else {
 578                 timeout = IDEFLOPPY_WAIT_CMD;
 579                 expiry = NULL;
 580         }
 581
 582         ide_set_handler(drive, &idefloppy_pc_intr, timeout, expiry);
 583
 584         if ((floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) == 0)
 585                 /* Send the actual packet */
 586                 hwif->output_data(drive, NULL, floppy->pc->c, 12);
 587
 588         return ide_started;
 589 }
 590
 591 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 592                                     struct ide_atapi_pc *pc)
 593 {
 594         /* supress error messages resulting from Medium not present */
 595         if (floppy->sense_key == 0x02 &&
 596             floppy->asc       == 0x3a &&
 597             floppy->ascq      == 0x00)
 598                 return;
 599
 600         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 601                         "asc = %2x, ascq = %2x\n",
 602                         floppy->drive->name, pc->c[0], floppy->sense_key,
 603                         floppy->asc, floppy->ascq);
 604
 605 }
 606
 607 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 608                 struct ide_atapi_pc *pc)
 609 {
 610         idefloppy_floppy_t *floppy = drive->driver_data;
 611         ide_hwif_t *hwif = drive->hwif;
 612         u16 bcount;
 613         u8 dma;
 614
 615         if (floppy->failed_pc == NULL &&
 616             pc->c[0] != GPCMD_REQUEST_SENSE)
 617                 floppy->failed_pc = pc;
 618         /* Set the current packet command */
 619         floppy->pc = pc;
 620
 621         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 622                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 623                         ide_floppy_report_error(floppy, pc);
 624                 /* Giving up */
 625                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 626
 627                 floppy->failed_pc = NULL;
 628                 pc->idefloppy_callback(drive);
 629                 return ide_stopped;
 630         }
 631
 632         debug_log("Retry number - %d\n", pc->retries);
 633
 634         pc->retries++;
 635         /* We haven't transferred any data yet */
 636         pc->xferred = 0;
 637         pc->cur_pos = pc->buf;
 638         bcount = min(pc->req_xfer, 63 * 1024);
 639
 640         if (pc->flags & PC_FLAG_DMA_ERROR) {
 641                 pc->flags &= ~PC_FLAG_DMA_ERROR;
 642                 ide_dma_off(drive);
 643         }
 644         dma = 0;
 645
 646         if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
 647                 dma = !hwif->dma_ops->dma_setup(drive);
 648
 649         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma);
 650
 651         if (dma) {
 652                 /* Begin DMA, if necessary */
 653                 pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
 654                 hwif->dma_ops->dma_start(drive);
 655         }
 656
 657         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
 658                 /* Issue the packet command */
 659                 ide_execute_command(drive, WIN_PACKETCMD,
 660                                 &idefloppy_transfer_pc1,
 661                                 IDEFLOPPY_WAIT_CMD,
 662                                 NULL);
 663                 return ide_started;
 664         } else {
 665                 /* Issue the packet command */
 666                 ide_execute_pkt_cmd(drive);
 667                 return idefloppy_transfer_pc1(drive);
 668         }
 669 }
 670
 671 static void idefloppy_rw_callback(ide_drive_t *drive)
 672 {
 673         debug_log("Reached %s\n", __func__);
 674
 675         idefloppy_end_request(drive, 1, 0);
 676         return;
 677 }
 678
 679 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 680 {
 681         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 682
 683         idefloppy_init_pc(pc);
 684         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 685         pc->c[4] = prevent;
 686 }
 687
 688 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 689 {
 690         idefloppy_init_pc(pc);
 691         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 692         pc->c[7] = 255;
 693         pc->c[8] = 255;
 694         pc->req_xfer = 255;
 695 }
 696
 697 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 698                 int l, int flags)
 699 {
 700         idefloppy_init_pc(pc);
 701         pc->c[0] = GPCMD_FORMAT_UNIT;
 702         pc->c[1] = 0x17;
 703
 704         memset(pc->buf, 0, 12);
 705         pc->buf[1] = 0xA2;
 706         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 707
 708         if (flags & 1)                          /* Verify bit on... */
 709                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 710         pc->buf[3] = 8;
 711
 712         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 713         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 714         pc->buf_size = 12;
 715         pc->flags |= PC_FLAG_WRITING;
 716 }
 717
 718 /* A mode sense command is used to "sense" floppy parameters. */
 719 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 720                 u8 page_code, u8 type)
 721 {
 722         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 723
 724         idefloppy_init_pc(pc);
 725         pc->c[0] = GPCMD_MODE_SENSE_10;
 726         pc->c[1] = 0;
 727         pc->c[2] = page_code + (type << 6);
 728
 729         switch (page_code) {
 730         case IDEFLOPPY_CAPABILITIES_PAGE:
 731                 length += 12;
 732                 break;
 733         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 734                 length += 32;
 735                 break;
 736         default:
 737                 printk(KERN_ERR "ide-floppy: unsupported page code "
 738                                 "in create_mode_sense_cmd\n");
 739         }
 740         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 741         pc->req_xfer = length;
 742 }
 743
 744 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 745 {
 746         idefloppy_init_pc(pc);
 747         pc->c[0] = GPCMD_START_STOP_UNIT;
 748         pc->c[4] = start;
 749 }
 750
 751 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 752 {
 753         idefloppy_init_pc(pc);
 754         pc->c[0] = GPCMD_TEST_UNIT_READY;
 755 }
 756
 757 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 758                                     struct ide_atapi_pc *pc, struct request *rq,
 759                                     unsigned long sector)
 760 {
 761         int block = sector / floppy->bs_factor;
 762         int blocks = rq->nr_sectors / floppy->bs_factor;
 763         int cmd = rq_data_dir(rq);
 764
 765         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 766                 block, blocks);
 767
 768         idefloppy_init_pc(pc);
 769         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 770         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 771         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 772
 773         pc->idefloppy_callback = &idefloppy_rw_callback;
 774         pc->rq = rq;
 775         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 776         if (rq->cmd_flags & REQ_RW)
 777                 pc->flags |= PC_FLAG_WRITING;
 778         pc->buf = NULL;
 779         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 780         pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 781 }
 782
 783 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 784                 struct ide_atapi_pc *pc, struct request *rq)
 785 {
 786         idefloppy_init_pc(pc);
 787         pc->idefloppy_callback = &idefloppy_rw_callback;
 788         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 789         pc->rq = rq;
 790         pc->b_count = rq->data_len;
 791         if (rq->data_len && rq_data_dir(rq) == WRITE)
 792                 pc->flags |= PC_FLAG_WRITING;
 793         pc->buf = rq->data;
 794         if (rq->bio)
 795                 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 796         /*
 797          * possibly problematic, doesn't look like ide-floppy correctly
 798          * handled scattered requests if dma fails...
 799          */
 800         pc->req_xfer = pc->buf_size = rq->data_len;
 801 }
 802
 803 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 804                 struct request *rq, sector_t block_s)
 805 {
 806         idefloppy_floppy_t *floppy = drive->driver_data;
 807         struct ide_atapi_pc *pc;
 808         unsigned long block = (unsigned long)block_s;
 809
 810         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 811                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 812                         rq->cmd_type, rq->errors);
 813         debug_log("sector: %ld, nr_sectors: %ld, "
 814                         "current_nr_sectors: %d\n", (long)rq->sector,
 815                         rq->nr_sectors, rq->current_nr_sectors);
 816
 817         if (rq->errors >= ERROR_MAX) {
 818                 if (floppy->failed_pc)
 819                         ide_floppy_report_error(floppy, floppy->failed_pc);
 820                 else
 821                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 822                                 drive->name);
 823                 idefloppy_end_request(drive, 0, 0);
 824                 return ide_stopped;
 825         }
 826         if (blk_fs_request(rq)) {
 827                 if (((long)rq->sector % floppy->bs_factor) ||
 828                     (rq->nr_sectors % floppy->bs_factor)) {
 829                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 830                                         drive->name);
 831                         idefloppy_end_request(drive, 0, 0);
 832                         return ide_stopped;
 833                 }
 834                 pc = idefloppy_next_pc_storage(drive);
 835                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 836         } else if (blk_special_request(rq)) {
 837                 pc = (struct ide_atapi_pc *) rq->buffer;
 838         } else if (blk_pc_request(rq)) {
 839                 pc = idefloppy_next_pc_storage(drive);
 840                 idefloppy_blockpc_cmd(floppy, pc, rq);
 841         } else {
 842                 blk_dump_rq_flags(rq,
 843                         "ide-floppy: unsupported command in queue");
 844                 idefloppy_end_request(drive, 0, 0);
 845                 return ide_stopped;
 846         }
 847
 848         pc->rq = rq;
 849         return idefloppy_issue_pc(drive, pc);
 850 }
 851
 852 /*
 853  * Add a special packet command request to the tail of the request queue,
 854  * and wait for it to be serviced.
 855  */
 856 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 857 {
 858         struct ide_floppy_obj *floppy = drive->driver_data;
 859         struct request *rq;
 860         int error;
 861
 862         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 863         rq->buffer = (char *) pc;
 864         rq->cmd_type = REQ_TYPE_SPECIAL;
 865         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
 866         blk_put_request(rq);
 867
 868         return error;
 869 }
 870
 871 /*
 872  * Look at the flexible disk page parameters. We ignore the CHS capacity
 873  * parameters and use the LBA parameters instead.
 874  */
 875 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 876 {
 877         idefloppy_floppy_t *floppy = drive->driver_data;
 878         struct ide_atapi_pc pc;
 879         u8 *page;
 880         int capacity, lba_capacity;
 881         u16 transfer_rate, sector_size, cyls, rpm;
 882         u8 heads, sectors;
 883
 884         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 885                                         MODE_SENSE_CURRENT);
 886
 887         if (idefloppy_queue_pc_tail(drive, &pc)) {
 888                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 889                                 " parameters\n");
 890                 return 1;
 891         }
 892         floppy->wp = !!(pc.buf[3] & 0x80);
 893         set_disk_ro(floppy->disk, floppy->wp);
 894         page = &pc.buf[8];
 895
 896         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
 897         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
 898         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
 899         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
 900         heads         = pc.buf[8 + 4];
 901         sectors       = pc.buf[8 + 5];
 902
 903         capacity = cyls * heads * sectors * sector_size;
 904
 905         if (memcmp(page, &floppy->flexible_disk_page, 32))
 906                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 907                                 "%d sector size, %d rpm\n",
 908                                 drive->name, capacity / 1024, cyls, heads,
 909                                 sectors, transfer_rate / 8, sector_size, rpm);
 910
 911         memcpy(&floppy->flexible_disk_page, page, 32);
 912         drive->bios_cyl = cyls;
 913         drive->bios_head = heads;
 914         drive->bios_sect = sectors;
 915         lba_capacity = floppy->blocks * floppy->block_size;
 916
 917         if (capacity < lba_capacity) {
 918                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 919                         "bytes, but the drive only handles %d\n",
 920                         drive->name, lba_capacity, capacity);
 921                 floppy->blocks = floppy->block_size ?
 922                         capacity / floppy->block_size : 0;
 923         }
 924         return 0;
 925 }
 926
 927 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 928 {
 929         idefloppy_floppy_t *floppy = drive->driver_data;
 930         struct ide_atapi_pc pc;
 931
 932         floppy->srfp = 0;
 933         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 934                                                  MODE_SENSE_CURRENT);
 935
 936         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 937         if (idefloppy_queue_pc_tail(drive, &pc))
 938                 return 1;
 939
 940         floppy->srfp = pc.buf[8 + 2] & 0x40;
 941         return (0);
 942 }
 943
 944 /*
 945  * Determine if a media is present in the floppy drive, and if so, its LBA
 946  * capacity.
 947  */
 948 static int ide_floppy_get_capacity(ide_drive_t *drive)
 949 {
 950         idefloppy_floppy_t *floppy = drive->driver_data;
 951         struct ide_atapi_pc pc;
 952         u8 *cap_desc;
 953         u8 header_len, desc_cnt;
 954         int i, rc = 1, blocks, length;
 955
 956         drive->bios_cyl = 0;
 957         drive->bios_head = drive->bios_sect = 0;
 958         floppy->blocks = 0;
 959         floppy->bs_factor = 1;
 960         set_capacity(floppy->disk, 0);
 961
 962         idefloppy_create_read_capacity_cmd(&pc);
 963         if (idefloppy_queue_pc_tail(drive, &pc)) {
 964                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 965                 return 1;
 966         }
 967         header_len = pc.buf[3];
 968         cap_desc = &pc.buf[4];
 969         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 970
 971         for (i = 0; i < desc_cnt; i++) {
 972                 unsigned int desc_start = 4 + i*8;
 973
 974                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
 975                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 976
 977                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 978                                 i, blocks * length / 1024, blocks, length);
 979
 980                 if (i)
 981                         continue;
 982                 /*
 983                  * the code below is valid only for the 1st descriptor, ie i=0
 984                  */
 985
 986                 switch (pc.buf[desc_start + 4] & 0x03) {
 987                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
 988                 case CAPACITY_UNFORMATTED:
 989                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 990                                 /*
 991                                  * If it is not a clik drive, break out
 992                                  * (maintains previous driver behaviour)
 993                                  */
 994                                 break;
 995                 case CAPACITY_CURRENT:
 996                         /* Normal Zip/LS-120 disks */
 997                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
 998                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 999                                         "sector size\n", drive->name,
1000                                         blocks * length / 1024, blocks, length);
1001                         memcpy(&floppy->cap_desc, cap_desc, 8);
1002
1003                         if (!length || length % 512) {
1004                                 printk(KERN_NOTICE "%s: %d bytes block size "
1005                                         "not supported\n", drive->name, length);
1006                         } else {
1007                                 floppy->blocks = blocks;
1008                                 floppy->block_size = length;
1009                                 floppy->bs_factor = length / 512;
1010                                 if (floppy->bs_factor != 1)
1011                                         printk(KERN_NOTICE "%s: warning: non "
1012                                                 "512 bytes block size not "
1013                                                 "fully supported\n",
1014                                                 drive->name);
1015                                 rc = 0;
1016                         }
1017                         break;
1018                 case CAPACITY_NO_CARTRIDGE:
1019                         /*
1020                          * This is a KERN_ERR so it appears on screen
1021                          * for the user to see
1022                          */
1023                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1024                         break;
1025                 case CAPACITY_INVALID:
1026                         printk(KERN_ERR "%s: Invalid capacity for disk "
1027                                 "in drive\n", drive->name);
1028                         break;
1029                 }
1030                 debug_log("Descriptor 0 Code: %d\n",
1031                           pc.buf[desc_start + 4] & 0x03);
1032         }
1033
1034         /* Clik! disk does not support get_flexible_disk_page */
1035         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1036                 (void) ide_floppy_get_flexible_disk_page(drive);
1037
1038         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1039         return rc;
1040 }
1041
1042 /*
1043  * Obtain the list of formattable capacities.
1044  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1045  * descriptors to userland, instead of our own structures.
1046  *
1047  * Userland gives us the following structure:
1048  *
1049  * struct idefloppy_format_capacities {
1050  *      int nformats;
1051  *      struct {
1052  *              int nblocks;
1053  *              int blocksize;
1054  *      } formats[];
1055  * };
1056  *
1057  * userland initializes nformats to the number of allocated formats[] records.
1058  * On exit we set nformats to the number of records we've actually initialized.
1059  */
1060
1061 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1062 {
1063         struct ide_atapi_pc pc;
1064         u8 header_len, desc_cnt;
1065         int i, blocks, length, u_array_size, u_index;
1066         int __user *argp;
1067
1068         if (get_user(u_array_size, arg))
1069                 return (-EFAULT);
1070
1071         if (u_array_size <= 0)
1072                 return (-EINVAL);
1073
1074         idefloppy_create_read_capacity_cmd(&pc);
1075         if (idefloppy_queue_pc_tail(drive, &pc)) {
1076                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1077                 return (-EIO);
1078         }
1079         header_len = pc.buf[3];
1080         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1081
1082         u_index = 0;
1083         argp = arg + 1;
1084
1085         /*
1086          * We always skip the first capacity descriptor.  That's the current
1087          * capacity.  We are interested in the remaining descriptors, the
1088          * formattable capacities.
1089          */
1090         for (i = 1; i < desc_cnt; i++) {
1091                 unsigned int desc_start = 4 + i*8;
1092
1093                 if (u_index >= u_array_size)
1094                         break;  /* User-supplied buffer too small */
1095
1096                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1097                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1098
1099                 if (put_user(blocks, argp))
1100                         return(-EFAULT);
1101                 ++argp;
1102
1103                 if (put_user(length, argp))
1104                         return (-EFAULT);
1105                 ++argp;
1106
1107                 ++u_index;
1108         }
1109
1110         if (put_user(u_index, arg))
1111                 return (-EFAULT);
1112         return (0);
1113 }
1114
1115 /*
1116  * Get ATAPI_FORMAT_UNIT progress indication.
1117  *
1118  * Userland gives a pointer to an int.  The int is set to a progress
1119  * indicator 0-65536, with 65536=100%.
1120  *
1121  * If the drive does not support format progress indication, we just check
1122  * the dsc bit, and return either 0 or 65536.
1123  */
1124
1125 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1126 {
1127         idefloppy_floppy_t *floppy = drive->driver_data;
1128         struct ide_atapi_pc pc;
1129         int progress_indication = 0x10000;
1130
1131         if (floppy->srfp) {
1132                 idefloppy_create_request_sense_cmd(&pc);
1133                 if (idefloppy_queue_pc_tail(drive, &pc))
1134                         return (-EIO);
1135
1136                 if (floppy->sense_key == 2 &&
1137                     floppy->asc == 4 &&
1138                     floppy->ascq == 4)
1139                         progress_indication = floppy->progress_indication;
1140
1141                 /* Else assume format_unit has finished, and we're at 0x10000 */
1142         } else {
1143                 unsigned long flags;
1144                 u8 stat;
1145
1146                 local_irq_save(flags);
1147                 stat = ide_read_status(drive);
1148                 local_irq_restore(flags);
1149
1150                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1151         }
1152         if (put_user(progress_indication, arg))
1153                 return (-EFAULT);
1154
1155         return (0);
1156 }
1157
1158 static sector_t idefloppy_capacity(ide_drive_t *drive)
1159 {
1160         idefloppy_floppy_t *floppy = drive->driver_data;
1161         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1162
1163         return capacity;
1164 }
1165
1166 /*
1167  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1168  * results.
1169  */
1170 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1171 {
1172         u8 gcw[2];
1173         u8 device_type, protocol, removable, drq_type, packet_size;
1174
1175         *((u16 *) &gcw) = id->config;
1176
1177         device_type =  gcw[1] & 0x1F;
1178         removable   = (gcw[0] & 0x80) >> 7;
1179         protocol    = (gcw[1] & 0xC0) >> 6;
1180         drq_type    = (gcw[0] & 0x60) >> 5;
1181         packet_size =  gcw[0] & 0x03;
1182
1183 #ifdef CONFIG_PPC
1184         /* kludge for Apple PowerBook internal zip */
1185         if (device_type == 5 &&
1186             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1187                 device_type = 0;
1188 #endif
1189
1190         if (protocol != 2)
1191                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1192                         protocol);
1193         else if (device_type != 0)
1194                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1195                                 "to floppy\n", device_type);
1196         else if (!removable)
1197                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1198         else if (drq_type == 3)
1199                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1200                                 "supported\n", drq_type);
1201         else if (packet_size != 0)
1202                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1203                                 "bytes\n", packet_size);
1204         else
1205                 return 1;
1206         return 0;
1207 }
1208
1209 #ifdef CONFIG_IDE_PROC_FS
1210 static void idefloppy_add_settings(ide_drive_t *drive)
1211 {
1212         idefloppy_floppy_t *floppy = drive->driver_data;
1213
1214         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1215                         &drive->bios_cyl, NULL);
1216         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1217                         &drive->bios_head, NULL);
1218         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1219                         &drive->bios_sect, NULL);
1220         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1221                         &floppy->ticks,  NULL);
1222 }
1223 #else
1224 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1225 #endif
1226
1227 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1228 {
1229         u8 gcw[2];
1230
1231         *((u16 *) &gcw) = drive->id->config;
1232         floppy->pc = floppy->pc_stack;
1233
1234         if (((gcw[0] & 0x60) >> 5) == 1)
1235                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1236         /*
1237          * We used to check revisions here. At this point however I'm giving up.
1238          * Just assume they are all broken, its easier.
1239          *
1240          * The actual reason for the workarounds was likely a driver bug after
1241          * all rather than a firmware bug, and the workaround below used to hide
1242          * it. It should be fixed as of version 1.9, but to be on the safe side
1243          * we'll leave the limitation below for the 2.2.x tree.
1244          */
1245         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1246                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1247                 /* This value will be visible in the /proc/ide/hdx/settings */
1248                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1249                 blk_queue_max_sectors(drive->queue, 64);
1250         }
1251
1252         /*
1253          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1254          * nasty clicking noises without it, so please don't remove this.
1255          */
1256         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1257                 blk_queue_max_sectors(drive->queue, 64);
1258                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1259         }
1260
1261         (void) ide_floppy_get_capacity(drive);
1262         idefloppy_add_settings(drive);
1263 }
1264
1265 static void ide_floppy_remove(ide_drive_t *drive)
1266 {
1267         idefloppy_floppy_t *floppy = drive->driver_data;
1268         struct gendisk *g = floppy->disk;
1269
1270         ide_proc_unregister_driver(drive, floppy->driver);
1271
1272         del_gendisk(g);
1273
1274         ide_floppy_put(floppy);
1275 }
1276
1277 static void idefloppy_cleanup_obj(struct kref *kref)
1278 {
1279         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1280         ide_drive_t *drive = floppy->drive;
1281         struct gendisk *g = floppy->disk;
1282
1283         drive->driver_data = NULL;
1284         g->private_data = NULL;
1285         put_disk(g);
1286         kfree(floppy);
1287 }
1288
1289 #ifdef CONFIG_IDE_PROC_FS
1290 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1291                 int count, int *eof, void *data)
1292 {
1293         ide_drive_t*drive = (ide_drive_t *)data;
1294         int len;
1295
1296         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1297         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1298 }
1299
1300 static ide_proc_entry_t idefloppy_proc[] = {
1301         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1302         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1303         { NULL, 0, NULL, NULL }
1304 };
1305 #endif  /* CONFIG_IDE_PROC_FS */
1306
1307 static int ide_floppy_probe(ide_drive_t *);
1308
1309 static ide_driver_t idefloppy_driver = {
1310         .gen_driver = {
1311                 .owner          = THIS_MODULE,
1312                 .name           = "ide-floppy",
1313                 .bus            = &ide_bus_type,
1314         },
1315         .probe                  = ide_floppy_probe,
1316         .remove                 = ide_floppy_remove,
1317         .version                = IDEFLOPPY_VERSION,
1318         .media                  = ide_floppy,
1319         .supports_dsc_overlap   = 0,
1320         .do_request             = idefloppy_do_request,
1321         .end_request            = idefloppy_end_request,
1322         .error                  = __ide_error,
1323         .abort                  = __ide_abort,
1324 #ifdef CONFIG_IDE_PROC_FS
1325         .proc                   = idefloppy_proc,
1326 #endif
1327 };
1328
1329 static int idefloppy_open(struct inode *inode, struct file *filp)
1330 {
1331         struct gendisk *disk = inode->i_bdev->bd_disk;
1332         struct ide_floppy_obj *floppy;
1333         ide_drive_t *drive;
1334         struct ide_atapi_pc pc;
1335         int ret = 0;
1336
1337         debug_log("Reached %s\n", __func__);
1338
1339         floppy = ide_floppy_get(disk);
1340         if (!floppy)
1341                 return -ENXIO;
1342
1343         drive = floppy->drive;
1344
1345         floppy->openers++;
1346
1347         if (floppy->openers == 1) {
1348                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1349                 /* Just in case */
1350
1351                 idefloppy_create_test_unit_ready_cmd(&pc);
1352                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1353                         idefloppy_create_start_stop_cmd(&pc, 1);
1354                         (void) idefloppy_queue_pc_tail(drive, &pc);
1355                 }
1356
1357                 if (ide_floppy_get_capacity(drive)
1358                    && (filp->f_flags & O_NDELAY) == 0
1359                     /*
1360                      * Allow O_NDELAY to open a drive without a disk, or with an
1361                      * unreadable disk, so that we can get the format capacity
1362                      * of the drive or begin the format - Sam
1363                      */
1364                     ) {
1365                         ret = -EIO;
1366                         goto out_put_floppy;
1367                 }
1368
1369                 if (floppy->wp && (filp->f_mode & 2)) {
1370                         ret = -EROFS;
1371                         goto out_put_floppy;
1372                 }
1373                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1374                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1375                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1376                         idefloppy_create_prevent_cmd(&pc, 1);
1377                         (void) idefloppy_queue_pc_tail(drive, &pc);
1378                 }
1379                 check_disk_change(inode->i_bdev);
1380         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1381                 ret = -EBUSY;
1382                 goto out_put_floppy;
1383         }
1384         return 0;
1385
1386 out_put_floppy:
1387         floppy->openers--;
1388         ide_floppy_put(floppy);
1389         return ret;
1390 }
1391
1392 static int idefloppy_release(struct inode *inode, struct file *filp)
1393 {
1394         struct gendisk *disk = inode->i_bdev->bd_disk;
1395         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1396         ide_drive_t *drive = floppy->drive;
1397         struct ide_atapi_pc pc;
1398
1399         debug_log("Reached %s\n", __func__);
1400
1401         if (floppy->openers == 1) {
1402                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1403                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1404                         idefloppy_create_prevent_cmd(&pc, 0);
1405                         (void) idefloppy_queue_pc_tail(drive, &pc);
1406                 }
1407
1408                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1409         }
1410
1411         floppy->openers--;
1412
1413         ide_floppy_put(floppy);
1414
1415         return 0;
1416 }
1417
1418 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1419 {
1420         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1421         ide_drive_t *drive = floppy->drive;
1422
1423         geo->heads = drive->bios_head;
1424         geo->sectors = drive->bios_sect;
1425         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1426         return 0;
1427 }
1428
1429 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1430                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1431 {
1432         if (floppy->openers > 1)
1433                 return -EBUSY;
1434
1435         /* The IOMEGA Clik! Drive doesn't support this command -
1436          * no room for an eject mechanism */
1437         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1438                 int prevent = arg ? 1 : 0;
1439
1440                 if (cmd == CDROMEJECT)
1441                         prevent = 0;
1442
1443                 idefloppy_create_prevent_cmd(pc, prevent);
1444                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1445         }
1446
1447         if (cmd == CDROMEJECT) {
1448                 idefloppy_create_start_stop_cmd(pc, 2);
1449                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1450         }
1451
1452         return 0;
1453 }
1454
1455 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1456                                   int __user *arg)
1457 {
1458         int blocks, length, flags, err = 0;
1459         struct ide_atapi_pc pc;
1460
1461         if (floppy->openers > 1) {
1462                 /* Don't format if someone is using the disk */
1463                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1464                 return -EBUSY;
1465         }
1466
1467         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1468
1469         /*
1470          * Send ATAPI_FORMAT_UNIT to the drive.
1471          *
1472          * Userland gives us the following structure:
1473          *
1474          * struct idefloppy_format_command {
1475          *        int nblocks;
1476          *        int blocksize;
1477          *        int flags;
1478          *        } ;
1479          *
1480          * flags is a bitmask, currently, the only defined flag is:
1481          *
1482          *        0x01 - verify media after format.
1483          */
1484         if (get_user(blocks, arg) ||
1485                         get_user(length, arg+1) ||
1486                         get_user(flags, arg+2)) {
1487                 err = -EFAULT;
1488                 goto out;
1489         }
1490
1491         (void) idefloppy_get_sfrp_bit(floppy->drive);
1492         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1493
1494         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1495                 err = -EIO;
1496
1497 out:
1498         if (err)
1499                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1500         return err;
1501 }
1502
1503
1504 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1505                         unsigned int cmd, unsigned long arg)
1506 {
1507         struct block_device *bdev = inode->i_bdev;
1508         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1509         ide_drive_t *drive = floppy->drive;
1510         struct ide_atapi_pc pc;
1511         void __user *argp = (void __user *)arg;
1512         int err;
1513
1514         switch (cmd) {
1515         case CDROMEJECT:
1516                 /* fall through */
1517         case CDROM_LOCKDOOR:
1518                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1519         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1520                 return 0;
1521         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1522                 return ide_floppy_get_format_capacities(drive, argp);
1523         case IDEFLOPPY_IOCTL_FORMAT_START:
1524                 if (!(file->f_mode & 2))
1525                         return -EPERM;
1526
1527                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1528         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1529                 return idefloppy_get_format_progress(drive, argp);
1530         }
1531
1532         /*
1533          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1534          * and CDROM_SEND_PACKET (legacy) ioctls
1535          */
1536         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1537                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1538                                         bdev->bd_disk, cmd, argp);
1539         else
1540                 err = -ENOTTY;
1541
1542         if (err == -ENOTTY)
1543                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1544
1545         return err;
1546 }
1547
1548 static int idefloppy_media_changed(struct gendisk *disk)
1549 {
1550         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1551         ide_drive_t *drive = floppy->drive;
1552         int ret;
1553
1554         /* do not scan partitions twice if this is a removable device */
1555         if (drive->attach) {
1556                 drive->attach = 0;
1557                 return 0;
1558         }
1559         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1560         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1561         return ret;
1562 }
1563
1564 static int idefloppy_revalidate_disk(struct gendisk *disk)
1565 {
1566         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1567         set_capacity(disk, idefloppy_capacity(floppy->drive));
1568         return 0;
1569 }
1570
1571 static struct block_device_operations idefloppy_ops = {
1572         .owner                  = THIS_MODULE,
1573         .open                   = idefloppy_open,
1574         .release                = idefloppy_release,
1575         .ioctl                  = idefloppy_ioctl,
1576         .getgeo                 = idefloppy_getgeo,
1577         .media_changed          = idefloppy_media_changed,
1578         .revalidate_disk        = idefloppy_revalidate_disk
1579 };
1580
1581 static int ide_floppy_probe(ide_drive_t *drive)
1582 {
1583         idefloppy_floppy_t *floppy;
1584         struct gendisk *g;
1585
1586         if (!strstr("ide-floppy", drive->driver_req))
1587                 goto failed;
1588         if (!drive->present)
1589                 goto failed;
1590         if (drive->media != ide_floppy)
1591                 goto failed;
1592         if (!idefloppy_identify_device(drive, drive->id)) {
1593                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1594                                 " of ide-floppy\n", drive->name);
1595                 goto failed;
1596         }
1597         if (drive->scsi) {
1598                 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
1599                                 " emulation.\n", drive->name);
1600                 goto failed;
1601         }
1602         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1603         if (!floppy) {
1604                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1605                                 " structure\n", drive->name);
1606                 goto failed;
1607         }
1608
1609         g = alloc_disk(1 << PARTN_BITS);
1610         if (!g)
1611                 goto out_free_floppy;
1612
1613         ide_init_disk(g, drive);
1614
1615         ide_proc_register_driver(drive, &idefloppy_driver);
1616
1617         kref_init(&floppy->kref);
1618
1619         floppy->drive = drive;
1620         floppy->driver = &idefloppy_driver;
1621         floppy->disk = g;
1622
1623         g->private_data = &floppy->driver;
1624
1625         drive->driver_data = floppy;
1626
1627         idefloppy_setup(drive, floppy);
1628
1629         g->minors = 1 << PARTN_BITS;
1630         g->driverfs_dev = &drive->gendev;
1631         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1632         g->fops = &idefloppy_ops;
1633         drive->attach = 1;
1634         add_disk(g);
1635         return 0;
1636
1637 out_free_floppy:
1638         kfree(floppy);
1639 failed:
1640         return -ENODEV;
1641 }
1642
1643 static void __exit idefloppy_exit(void)
1644 {
1645         driver_unregister(&idefloppy_driver.gen_driver);
1646 }
1647
1648 static int __init idefloppy_init(void)
1649 {
1650         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1651         return driver_register(&idefloppy_driver.gen_driver);
1652 }
1653
1654 MODULE_ALIAS("ide:*m-floppy*");
1655 module_init(idefloppy_init);
1656 module_exit(idefloppy_exit);
1657 MODULE_LICENSE("GPL");
1658 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1659