git.oblomov.eu Git - linux-2.6/blob - drivers/ide/ide-floppy.c

   1 /*
   2  * IDE ATAPI floppy driver.
   3  *
   4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
   5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
   6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
   7  *
   8  * This driver supports the following IDE floppy drives:
   9  *
  10  * LS-120/240 SuperDisk
  11  * Iomega Zip 100/250
  12  * Iomega PC Card Clik!/PocketZip
  13  *
  14  * For a historical changelog see
  15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  16  */
  17
  18 #define IDEFLOPPY_VERSION "1.00"
  19
  20 #include <linux/module.h>
  21 #include <linux/types.h>
  22 #include <linux/string.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/timer.h>
  26 #include <linux/mm.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/major.h>
  29 #include <linux/errno.h>
  30 #include <linux/genhd.h>
  31 #include <linux/slab.h>
  32 #include <linux/cdrom.h>
  33 #include <linux/ide.h>
  34 #include <linux/bitops.h>
  35 #include <linux/mutex.h>
  36
  37 #include <scsi/scsi_ioctl.h>
  38
  39 #include <asm/byteorder.h>
  40 #include <linux/irq.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/io.h>
  43 #include <asm/unaligned.h>
  44
  45 /* define to see debug info */
  46 #define IDEFLOPPY_DEBUG_LOG             0
  47
  48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
  49 #define IDEFLOPPY_DEBUG(fmt, args...)
  50
  51 #if IDEFLOPPY_DEBUG_LOG
  52 #define debug_log(fmt, args...) \
  53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
  54 #else
  55 #define debug_log(fmt, args...) do {} while (0)
  56 #endif
  57
  58
  59 /* Some drives require a longer irq timeout. */
  60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
  61
  62 /*
  63  * After each failed packet command we issue a request sense command and retry
  64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  65  */
  66 #define IDEFLOPPY_MAX_PC_RETRIES        3
  67
  68 /*
  69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
  70  * bytes.
  71  */
  72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
  73
  74 /*
  75  * In various places in the driver, we need to allocate storage for packet
  76  * commands and requests, which will remain valid while we leave the driver to
  77  * wait for an interrupt or a timeout event.
  78  */
  79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
  80
  81 /* format capacities descriptor codes */
  82 #define CAPACITY_INVALID        0x00
  83 #define CAPACITY_UNFORMATTED    0x01
  84 #define CAPACITY_CURRENT        0x02
  85 #define CAPACITY_NO_CARTRIDGE   0x03
  86
  87 /*
  88  * Most of our global data which we need to save even as we leave the driver
  89  * due to an interrupt or a timer event is stored in a variable of type
  90  * idefloppy_floppy_t, defined below.
  91  */
  92 typedef struct ide_floppy_obj {
  93         ide_drive_t     *drive;
  94         ide_driver_t    *driver;
  95         struct gendisk  *disk;
  96         struct kref     kref;
  97         unsigned int    openers;        /* protected by BKL for now */
  98
  99         /* Current packet command */
 100         struct ide_atapi_pc *pc;
 101         /* Last failed packet command */
 102         struct ide_atapi_pc *failed_pc;
 103         /* Packet command stack */
 104         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 105         /* Next free packet command storage space */
 106         int pc_stack_index;
 107         struct request rq_stack[IDEFLOPPY_PC_STACK];
 108         /* We implement a circular array */
 109         int rq_stack_index;
 110
 111         /* Last error information */
 112         u8 sense_key, asc, ascq;
 113         /* delay this long before sending packet command */
 114         u8 ticks;
 115         int progress_indication;
 116
 117         /* Device information */
 118         /* Current format */
 119         int blocks, block_size, bs_factor;
 120         /* Last format capacity descriptor */
 121         u8 cap_desc[8];
 122         /* Copy of the flexible disk page */
 123         u8 flexible_disk_page[32];
 124         /* Write protect */
 125         int wp;
 126         /* Supports format progress report */
 127         int srfp;
 128         /* Status/Action flags */
 129         unsigned long flags;
 130 } idefloppy_floppy_t;
 131
 132 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
 133
 134 /* Floppy flag bits values. */
 135 enum {
 136         /* DRQ interrupt device */
 137         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
 138         /* Media may have changed */
 139         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
 140         /* Format in progress */
 141         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
 142         /* Avoid commands not supported in Clik drive */
 143         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
 144         /* Requires BH algorithm for packets */
 145         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
 146 };
 147
 148 /* Defines for the MODE SENSE command */
 149 #define MODE_SENSE_CURRENT              0x00
 150 #define MODE_SENSE_CHANGEABLE           0x01
 151 #define MODE_SENSE_DEFAULT              0x02
 152 #define MODE_SENSE_SAVED                0x03
 153
 154 /* IOCTLs used in low-level formatting. */
 155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
 156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
 157 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
 158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
 159
 160 /* Error code returned in rq->errors to the higher part of the driver. */
 161 #define IDEFLOPPY_ERROR_GENERAL         101
 162
 163 /*
 164  * Pages of the SELECT SENSE / MODE SENSE packet commands.
 165  * See SFF-8070i spec.
 166  */
 167 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
 168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
 169
 170 static DEFINE_MUTEX(idefloppy_ref_mutex);
 171
 172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
 173
 174 #define ide_floppy_g(disk) \
 175         container_of((disk)->private_data, struct ide_floppy_obj, driver)
 176
 177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 178 {
 179         struct ide_floppy_obj *floppy = NULL;
 180
 181         mutex_lock(&idefloppy_ref_mutex);
 182         floppy = ide_floppy_g(disk);
 183         if (floppy)
 184                 kref_get(&floppy->kref);
 185         mutex_unlock(&idefloppy_ref_mutex);
 186         return floppy;
 187 }
 188
 189 static void idefloppy_cleanup_obj(struct kref *);
 190
 191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 192 {
 193         mutex_lock(&idefloppy_ref_mutex);
 194         kref_put(&floppy->kref, idefloppy_cleanup_obj);
 195         mutex_unlock(&idefloppy_ref_mutex);
 196 }
 197
 198 /*
 199  * Used to finish servicing a request. For read/write requests, we will call
 200  * ide_end_request to pass to the next buffer.
 201  */
 202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 203 {
 204         idefloppy_floppy_t *floppy = drive->driver_data;
 205         struct request *rq = HWGROUP(drive)->rq;
 206         int error;
 207
 208         debug_log("Reached %s\n", __func__);
 209
 210         switch (uptodate) {
 211         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
 212         case 1: error = 0; break;
 213         default: error = uptodate;
 214         }
 215         if (error)
 216                 floppy->failed_pc = NULL;
 217         /* Why does this happen? */
 218         if (!rq)
 219                 return 0;
 220         if (!blk_special_request(rq)) {
 221                 /* our real local end request function */
 222                 ide_end_request(drive, uptodate, nsecs);
 223                 return 0;
 224         }
 225         rq->errors = error;
 226         /* fixme: need to move this local also */
 227         ide_end_drive_cmd(drive, 0, 0);
 228         return 0;
 229 }
 230
 231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 232                                   unsigned int bcount, int direction)
 233 {
 234         struct request *rq = pc->rq;
 235         struct req_iterator iter;
 236         struct bio_vec *bvec;
 237         unsigned long flags;
 238         int count, done = 0;
 239         char *data;
 240
 241         rq_for_each_segment(bvec, rq, iter) {
 242                 if (!bcount)
 243                         break;
 244
 245                 count = min(bvec->bv_len, bcount);
 246
 247                 data = bvec_kmap_irq(bvec, &flags);
 248                 if (direction)
 249                         drive->hwif->atapi_output_bytes(drive, data, count);
 250                 else
 251                         drive->hwif->atapi_input_bytes(drive, data, count);
 252                 bvec_kunmap_irq(data, &flags);
 253
 254                 bcount -= count;
 255                 pc->b_count += count;
 256                 done += count;
 257         }
 258
 259         idefloppy_end_request(drive, 1, done >> 9);
 260
 261         if (bcount) {
 262                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
 263                                 drive->name, __func__, bcount);
 264                 if (direction)
 265                         ide_atapi_write_zeros(drive, bcount);
 266                 else
 267                         ide_atapi_discard_data(drive, 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         ide_init_drive_cmd(rq);
 292         rq->buffer = (char *) pc;
 293         rq->cmd_type = REQ_TYPE_SPECIAL;
 294         rq->rq_disk = floppy->disk;
 295         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 296 }
 297
 298 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 299 {
 300         idefloppy_floppy_t *floppy = drive->driver_data;
 301
 302         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
 303                 floppy->pc_stack_index = 0;
 304         return (&floppy->pc_stack[floppy->pc_stack_index++]);
 305 }
 306
 307 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 308 {
 309         idefloppy_floppy_t *floppy = drive->driver_data;
 310
 311         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
 312                 floppy->rq_stack_index = 0;
 313         return (&floppy->rq_stack[floppy->rq_stack_index++]);
 314 }
 315
 316 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 317 {
 318         idefloppy_floppy_t *floppy = drive->driver_data;
 319         u8 *buf = floppy->pc->buf;
 320
 321         debug_log("Reached %s\n", __func__);
 322
 323         if (!floppy->pc->error) {
 324                 floppy->sense_key = buf[2] & 0x0F;
 325                 floppy->asc = buf[12];
 326                 floppy->ascq = buf[13];
 327                 floppy->progress_indication = buf[15] & 0x80 ?
 328                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 329
 330                 if (floppy->failed_pc)
 331                         debug_log("pc = %x, sense key = %x, asc = %x,"
 332                                         " ascq = %x\n",
 333                                         floppy->failed_pc->c[0],
 334                                         floppy->sense_key,
 335                                         floppy->asc,
 336                                         floppy->ascq);
 337                 else
 338                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
 339                                         floppy->sense_key,
 340                                         floppy->asc,
 341                                         floppy->ascq);
 342
 343
 344                 idefloppy_end_request(drive, 1, 0);
 345         } else {
 346                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
 347                                 " request!\n");
 348                 idefloppy_end_request(drive, 0, 0);
 349         }
 350 }
 351
 352 /* General packet command callback function. */
 353 static void idefloppy_pc_callback(ide_drive_t *drive)
 354 {
 355         idefloppy_floppy_t *floppy = drive->driver_data;
 356
 357         debug_log("Reached %s\n", __func__);
 358
 359         idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 360 }
 361
 362 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 363 {
 364         memset(pc->c, 0, 12);
 365         pc->retries = 0;
 366         pc->flags = 0;
 367         pc->req_xfer = 0;
 368         pc->buf = pc->pc_buf;
 369         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
 370         pc->idefloppy_callback = &idefloppy_pc_callback;
 371 }
 372
 373 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 374 {
 375         idefloppy_init_pc(pc);
 376         pc->c[0] = GPCMD_REQUEST_SENSE;
 377         pc->c[4] = 255;
 378         pc->req_xfer = 18;
 379         pc->idefloppy_callback = &idefloppy_request_sense_callback;
 380 }
 381
 382 /*
 383  * Called when an error was detected during the last packet command. We queue a
 384  * request sense packet command in the head of the request list.
 385  */
 386 static void idefloppy_retry_pc(ide_drive_t *drive)
 387 {
 388         struct ide_atapi_pc *pc;
 389         struct request *rq;
 390
 391         (void)ide_read_error(drive);
 392         pc = idefloppy_next_pc_storage(drive);
 393         rq = idefloppy_next_rq_storage(drive);
 394         idefloppy_create_request_sense_cmd(pc);
 395         idefloppy_queue_pc_head(drive, pc, rq);
 396 }
 397
 398 /* The usual interrupt handler called during a packet command. */
 399 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 400 {
 401         idefloppy_floppy_t *floppy = drive->driver_data;
 402         ide_hwif_t *hwif = drive->hwif;
 403         struct ide_atapi_pc *pc = floppy->pc;
 404         struct request *rq = pc->rq;
 405         xfer_func_t *xferfunc;
 406         unsigned int temp;
 407         int dma_error = 0;
 408         u16 bcount;
 409         u8 stat, ireason;
 410
 411         debug_log("Reached %s interrupt handler\n", __func__);
 412
 413         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 414                 dma_error = hwif->ide_dma_end(drive);
 415                 if (dma_error) {
 416                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 417                                         rq_data_dir(rq) ? "write" : "read");
 418                         pc->flags |= PC_FLAG_DMA_ERROR;
 419                 } else {
 420                         pc->xferred = pc->req_xfer;
 421                         idefloppy_update_buffers(drive, pc);
 422                 }
 423                 debug_log("DMA finished\n");
 424         }
 425
 426         /* Clear the interrupt */
 427         stat = ide_read_status(drive);
 428
 429         /* No more interrupts */
 430         if ((stat & DRQ_STAT) == 0) {
 431                 debug_log("Packet command completed, %d bytes transferred\n",
 432                                 pc->xferred);
 433                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 434
 435                 local_irq_enable_in_hardirq();
 436
 437                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 438                         /* Error detected */
 439                         debug_log("%s: I/O error\n", drive->name);
 440                         rq->errors++;
 441                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 442                                 printk(KERN_ERR "ide-floppy: I/O error in "
 443                                         "request sense command\n");
 444                                 return ide_do_reset(drive);
 445                         }
 446                         /* Retry operation */
 447                         idefloppy_retry_pc(drive);
 448                         /* queued, but not started */
 449                         return ide_stopped;
 450                 }
 451                 pc->error = 0;
 452                 if (floppy->failed_pc == pc)
 453                         floppy->failed_pc = NULL;
 454                 /* Command finished - Call the callback function */
 455                 pc->idefloppy_callback(drive);
 456                 return ide_stopped;
 457         }
 458
 459         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 460                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 461                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 462                         "more interrupts in DMA mode\n");
 463                 ide_dma_off(drive);
 464                 return ide_do_reset(drive);
 465         }
 466
 467         /* Get the number of bytes to transfer */
 468         bcount = (hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]) << 8) |
 469                   hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
 470         /* on this interrupt */
 471         ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
 472
 473         if (ireason & CD) {
 474                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 475                 return ide_do_reset(drive);
 476         }
 477         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 478                 /* Hopefully, we will never get here */
 479                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 480                                 (ireason & IO) ? "Write" : "Read");
 481                 printk(KERN_ERR "but the floppy wants us to %s !\n",
 482                                 (ireason & IO) ? "Read" : "Write");
 483                 return ide_do_reset(drive);
 484         }
 485         if (!(pc->flags & PC_FLAG_WRITING)) {
 486                 /* Reading - Check that we have enough space */
 487                 temp = pc->xferred + bcount;
 488                 if (temp > pc->req_xfer) {
 489                         if (temp > pc->buf_size) {
 490                                 printk(KERN_ERR "ide-floppy: The floppy wants "
 491                                         "to send us more data than expected "
 492                                         "- discarding data\n");
 493                                 ide_atapi_discard_data(drive, 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 floppy wants to send us more data than"
 502                                         " expected - allowing transfer\n");
 503                 }
 504         }
 505         if (pc->flags & PC_FLAG_WRITING)
 506                 xferfunc = hwif->atapi_output_bytes;
 507         else
 508                 xferfunc = hwif->atapi_input_bytes;
 509
 510         if (pc->buf)
 511                 xferfunc(drive, 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  * This is the original routine that did the packet transfer.
 527  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 528  * for that drive below. The algorithm is chosen based on drive type
 529  */
 530 static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
 531 {
 532         ide_hwif_t *hwif = drive->hwif;
 533         ide_startstop_t startstop;
 534         idefloppy_floppy_t *floppy = drive->driver_data;
 535         u8 ireason;
 536
 537         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 538                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 539                                 "initiated yet DRQ isn't asserted\n");
 540                 return startstop;
 541         }
 542         ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
 543         if ((ireason & CD) == 0 || (ireason & IO)) {
 544                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 545                                 "issuing a packet command\n");
 546                 return ide_do_reset(drive);
 547         }
 548
 549         /* Set the interrupt routine */
 550         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 551         /* Send the actual packet */
 552         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 553         return ide_started;
 554 }
 555
 556
 557 /*
 558  * What we have here is a classic case of a top half / bottom half interrupt
 559  * service routine. In interrupt mode, the device sends an interrupt to signal
 560  * that it is ready to receive a packet. However, we need to delay about 2-3
 561  * ticks before issuing the packet or we gets in trouble.
 562  *
 563  * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
 564  * In either case, when the device says it's ready for a packet, we schedule
 565  * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
 566  */
 567 static int idefloppy_transfer_pc2(ide_drive_t *drive)
 568 {
 569         idefloppy_floppy_t *floppy = drive->driver_data;
 570
 571         /* Send the actual packet */
 572         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
 573         /* Timeout for the packet command */
 574         return IDEFLOPPY_WAIT_CMD;
 575 }
 576
 577 static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 578 {
 579         ide_hwif_t *hwif = drive->hwif;
 580         idefloppy_floppy_t *floppy = drive->driver_data;
 581         ide_startstop_t startstop;
 582         u8 ireason;
 583
 584         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
 585                 printk(KERN_ERR "ide-floppy: Strange, packet command "
 586                                 "initiated yet DRQ isn't asserted\n");
 587                 return startstop;
 588         }
 589         ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
 590         if ((ireason & CD) == 0 || (ireason & IO)) {
 591                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 592                                 "while issuing a packet command\n");
 593                 return ide_do_reset(drive);
 594         }
 595         /*
 596          * The following delay solves a problem with ATAPI Zip 100 drives
 597          * where the Busy flag was apparently being deasserted before the
 598          * unit was ready to receive data. This was happening on a
 599          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
 600          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 601          * used until after the packet is moved in about 50 msec.
 602          */
 603
 604         ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks,
 605                         &idefloppy_transfer_pc2);
 606         return ide_started;
 607 }
 608
 609 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 610                                     struct ide_atapi_pc *pc)
 611 {
 612         /* supress error messages resulting from Medium not present */
 613         if (floppy->sense_key == 0x02 &&
 614             floppy->asc       == 0x3a &&
 615             floppy->ascq      == 0x00)
 616                 return;
 617
 618         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
 619                         "asc = %2x, ascq = %2x\n",
 620                         floppy->drive->name, pc->c[0], floppy->sense_key,
 621                         floppy->asc, floppy->ascq);
 622
 623 }
 624
 625 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 626                 struct ide_atapi_pc *pc)
 627 {
 628         idefloppy_floppy_t *floppy = drive->driver_data;
 629         ide_hwif_t *hwif = drive->hwif;
 630         ide_handler_t *pkt_xfer_routine;
 631         u16 bcount;
 632         u8 dma;
 633
 634         if (floppy->failed_pc == NULL &&
 635             pc->c[0] != GPCMD_REQUEST_SENSE)
 636                 floppy->failed_pc = pc;
 637         /* Set the current packet command */
 638         floppy->pc = pc;
 639
 640         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 641                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 642                         ide_floppy_report_error(floppy, pc);
 643                 /* Giving up */
 644                 pc->error = IDEFLOPPY_ERROR_GENERAL;
 645
 646                 floppy->failed_pc = NULL;
 647                 pc->idefloppy_callback(drive);
 648                 return ide_stopped;
 649         }
 650
 651         debug_log("Retry number - %d\n", pc->retries);
 652
 653         pc->retries++;
 654         /* We haven't transferred any data yet */
 655         pc->xferred = 0;
 656         pc->cur_pos = pc->buf;
 657         bcount = min(pc->req_xfer, 63 * 1024);
 658
 659         if (pc->flags & PC_FLAG_DMA_ERROR) {
 660                 pc->flags &= ~PC_FLAG_DMA_ERROR;
 661                 ide_dma_off(drive);
 662         }
 663         dma = 0;
 664
 665         if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
 666                 dma = !hwif->dma_setup(drive);
 667
 668         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 669                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
 670
 671         if (dma) {
 672                 /* Begin DMA, if necessary */
 673                 pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
 674                 hwif->dma_start(drive);
 675         }
 676
 677         /* Can we transfer the packet when we get the interrupt or wait? */
 678         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
 679                 /* wait */
 680                 pkt_xfer_routine = &idefloppy_transfer_pc1;
 681         } else {
 682                 /* immediate */
 683                 pkt_xfer_routine = &idefloppy_transfer_pc;
 684         }
 685
 686         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
 687                 /* Issue the packet command */
 688                 ide_execute_command(drive, WIN_PACKETCMD,
 689                                 pkt_xfer_routine,
 690                                 IDEFLOPPY_WAIT_CMD,
 691                                 NULL);
 692                 return ide_started;
 693         } else {
 694                 /* Issue the packet command */
 695                 hwif->OUTB(WIN_PACKETCMD, hwif->io_ports[IDE_COMMAND_OFFSET]);
 696                 return (*pkt_xfer_routine) (drive);
 697         }
 698 }
 699
 700 static void idefloppy_rw_callback(ide_drive_t *drive)
 701 {
 702         debug_log("Reached %s\n", __func__);
 703
 704         idefloppy_end_request(drive, 1, 0);
 705         return;
 706 }
 707
 708 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 709 {
 710         debug_log("creating prevent removal command, prevent = %d\n", prevent);
 711
 712         idefloppy_init_pc(pc);
 713         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 714         pc->c[4] = prevent;
 715 }
 716
 717 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 718 {
 719         idefloppy_init_pc(pc);
 720         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 721         pc->c[7] = 255;
 722         pc->c[8] = 255;
 723         pc->req_xfer = 255;
 724 }
 725
 726 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
 727                 int l, int flags)
 728 {
 729         idefloppy_init_pc(pc);
 730         pc->c[0] = GPCMD_FORMAT_UNIT;
 731         pc->c[1] = 0x17;
 732
 733         memset(pc->buf, 0, 12);
 734         pc->buf[1] = 0xA2;
 735         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 736
 737         if (flags & 1)                          /* Verify bit on... */
 738                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
 739         pc->buf[3] = 8;
 740
 741         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
 742         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
 743         pc->buf_size = 12;
 744         pc->flags |= PC_FLAG_WRITING;
 745 }
 746
 747 /* A mode sense command is used to "sense" floppy parameters. */
 748 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 749                 u8 page_code, u8 type)
 750 {
 751         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 752
 753         idefloppy_init_pc(pc);
 754         pc->c[0] = GPCMD_MODE_SENSE_10;
 755         pc->c[1] = 0;
 756         pc->c[2] = page_code + (type << 6);
 757
 758         switch (page_code) {
 759         case IDEFLOPPY_CAPABILITIES_PAGE:
 760                 length += 12;
 761                 break;
 762         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 763                 length += 32;
 764                 break;
 765         default:
 766                 printk(KERN_ERR "ide-floppy: unsupported page code "
 767                                 "in create_mode_sense_cmd\n");
 768         }
 769         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 770         pc->req_xfer = length;
 771 }
 772
 773 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 774 {
 775         idefloppy_init_pc(pc);
 776         pc->c[0] = GPCMD_START_STOP_UNIT;
 777         pc->c[4] = start;
 778 }
 779
 780 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 781 {
 782         idefloppy_init_pc(pc);
 783         pc->c[0] = GPCMD_TEST_UNIT_READY;
 784 }
 785
 786 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 787                                     struct ide_atapi_pc *pc, struct request *rq,
 788                                     unsigned long sector)
 789 {
 790         int block = sector / floppy->bs_factor;
 791         int blocks = rq->nr_sectors / floppy->bs_factor;
 792         int cmd = rq_data_dir(rq);
 793
 794         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 795                 block, blocks);
 796
 797         idefloppy_init_pc(pc);
 798         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
 799         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 800         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 801
 802         pc->idefloppy_callback = &idefloppy_rw_callback;
 803         pc->rq = rq;
 804         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 805         if (rq->cmd_flags & REQ_RW)
 806                 pc->flags |= PC_FLAG_WRITING;
 807         pc->buf = NULL;
 808         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 809         pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 810 }
 811
 812 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
 813                 struct ide_atapi_pc *pc, struct request *rq)
 814 {
 815         idefloppy_init_pc(pc);
 816         pc->idefloppy_callback = &idefloppy_rw_callback;
 817         memcpy(pc->c, rq->cmd, sizeof(pc->c));
 818         pc->rq = rq;
 819         pc->b_count = rq->data_len;
 820         if (rq->data_len && rq_data_dir(rq) == WRITE)
 821                 pc->flags |= PC_FLAG_WRITING;
 822         pc->buf = rq->data;
 823         if (rq->bio)
 824                 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 825         /*
 826          * possibly problematic, doesn't look like ide-floppy correctly
 827          * handled scattered requests if dma fails...
 828          */
 829         pc->req_xfer = pc->buf_size = rq->data_len;
 830 }
 831
 832 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 833                 struct request *rq, sector_t block_s)
 834 {
 835         idefloppy_floppy_t *floppy = drive->driver_data;
 836         struct ide_atapi_pc *pc;
 837         unsigned long block = (unsigned long)block_s;
 838
 839         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 840                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
 841                         rq->cmd_type, rq->errors);
 842         debug_log("sector: %ld, nr_sectors: %ld, "
 843                         "current_nr_sectors: %d\n", (long)rq->sector,
 844                         rq->nr_sectors, rq->current_nr_sectors);
 845
 846         if (rq->errors >= ERROR_MAX) {
 847                 if (floppy->failed_pc)
 848                         ide_floppy_report_error(floppy, floppy->failed_pc);
 849                 else
 850                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 851                                 drive->name);
 852                 idefloppy_end_request(drive, 0, 0);
 853                 return ide_stopped;
 854         }
 855         if (blk_fs_request(rq)) {
 856                 if (((long)rq->sector % floppy->bs_factor) ||
 857                     (rq->nr_sectors % floppy->bs_factor)) {
 858                         printk(KERN_ERR "%s: unsupported r/w request size\n",
 859                                         drive->name);
 860                         idefloppy_end_request(drive, 0, 0);
 861                         return ide_stopped;
 862                 }
 863                 pc = idefloppy_next_pc_storage(drive);
 864                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
 865         } else if (blk_special_request(rq)) {
 866                 pc = (struct ide_atapi_pc *) rq->buffer;
 867         } else if (blk_pc_request(rq)) {
 868                 pc = idefloppy_next_pc_storage(drive);
 869                 idefloppy_blockpc_cmd(floppy, pc, rq);
 870         } else {
 871                 blk_dump_rq_flags(rq,
 872                         "ide-floppy: unsupported command in queue");
 873                 idefloppy_end_request(drive, 0, 0);
 874                 return ide_stopped;
 875         }
 876
 877         pc->rq = rq;
 878         return idefloppy_issue_pc(drive, pc);
 879 }
 880
 881 /*
 882  * Add a special packet command request to the tail of the request queue,
 883  * and wait for it to be serviced.
 884  */
 885 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 886 {
 887         struct ide_floppy_obj *floppy = drive->driver_data;
 888         struct request rq;
 889
 890         ide_init_drive_cmd(&rq);
 891         rq.buffer = (char *) pc;
 892         rq.cmd_type = REQ_TYPE_SPECIAL;
 893         rq.rq_disk = floppy->disk;
 894
 895         return ide_do_drive_cmd(drive, &rq, ide_wait);
 896 }
 897
 898 /*
 899  * Look at the flexible disk page parameters. We ignore the CHS capacity
 900  * parameters and use the LBA parameters instead.
 901  */
 902 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 903 {
 904         idefloppy_floppy_t *floppy = drive->driver_data;
 905         struct ide_atapi_pc pc;
 906         u8 *page;
 907         int capacity, lba_capacity;
 908         u16 transfer_rate, sector_size, cyls, rpm;
 909         u8 heads, sectors;
 910
 911         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
 912                                         MODE_SENSE_CURRENT);
 913
 914         if (idefloppy_queue_pc_tail(drive, &pc)) {
 915                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
 916                                 " parameters\n");
 917                 return 1;
 918         }
 919         floppy->wp = !!(pc.buf[3] & 0x80);
 920         set_disk_ro(floppy->disk, floppy->wp);
 921         page = &pc.buf[8];
 922
 923         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
 924         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
 925         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
 926         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
 927         heads         = pc.buf[8 + 4];
 928         sectors       = pc.buf[8 + 5];
 929
 930         capacity = cyls * heads * sectors * sector_size;
 931
 932         if (memcmp(page, &floppy->flexible_disk_page, 32))
 933                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 934                                 "%d sector size, %d rpm\n",
 935                                 drive->name, capacity / 1024, cyls, heads,
 936                                 sectors, transfer_rate / 8, sector_size, rpm);
 937
 938         memcpy(&floppy->flexible_disk_page, page, 32);
 939         drive->bios_cyl = cyls;
 940         drive->bios_head = heads;
 941         drive->bios_sect = sectors;
 942         lba_capacity = floppy->blocks * floppy->block_size;
 943
 944         if (capacity < lba_capacity) {
 945                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 946                         "bytes, but the drive only handles %d\n",
 947                         drive->name, lba_capacity, capacity);
 948                 floppy->blocks = floppy->block_size ?
 949                         capacity / floppy->block_size : 0;
 950         }
 951         return 0;
 952 }
 953
 954 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 955 {
 956         idefloppy_floppy_t *floppy = drive->driver_data;
 957         struct ide_atapi_pc pc;
 958
 959         floppy->srfp = 0;
 960         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 961                                                  MODE_SENSE_CURRENT);
 962
 963         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 964         if (idefloppy_queue_pc_tail(drive, &pc))
 965                 return 1;
 966
 967         floppy->srfp = pc.buf[8 + 2] & 0x40;
 968         return (0);
 969 }
 970
 971 /*
 972  * Determine if a media is present in the floppy drive, and if so, its LBA
 973  * capacity.
 974  */
 975 static int ide_floppy_get_capacity(ide_drive_t *drive)
 976 {
 977         idefloppy_floppy_t *floppy = drive->driver_data;
 978         struct ide_atapi_pc pc;
 979         u8 *cap_desc;
 980         u8 header_len, desc_cnt;
 981         int i, rc = 1, blocks, length;
 982
 983         drive->bios_cyl = 0;
 984         drive->bios_head = drive->bios_sect = 0;
 985         floppy->blocks = 0;
 986         floppy->bs_factor = 1;
 987         set_capacity(floppy->disk, 0);
 988
 989         idefloppy_create_read_capacity_cmd(&pc);
 990         if (idefloppy_queue_pc_tail(drive, &pc)) {
 991                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 992                 return 1;
 993         }
 994         header_len = pc.buf[3];
 995         cap_desc = &pc.buf[4];
 996         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 997
 998         for (i = 0; i < desc_cnt; i++) {
 999                 unsigned int desc_start = 4 + i*8;
1000
1001                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1002                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1003
1004                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1005                                 i, blocks * length / 1024, blocks, length);
1006
1007                 if (i)
1008                         continue;
1009                 /*
1010                  * the code below is valid only for the 1st descriptor, ie i=0
1011                  */
1012
1013                 switch (pc.buf[desc_start + 4] & 0x03) {
1014                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1015                 case CAPACITY_UNFORMATTED:
1016                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1017                                 /*
1018                                  * If it is not a clik drive, break out
1019                                  * (maintains previous driver behaviour)
1020                                  */
1021                                 break;
1022                 case CAPACITY_CURRENT:
1023                         /* Normal Zip/LS-120 disks */
1024                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1025                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1026                                         "sector size\n", drive->name,
1027                                         blocks * length / 1024, blocks, length);
1028                         memcpy(&floppy->cap_desc, cap_desc, 8);
1029
1030                         if (!length || length % 512) {
1031                                 printk(KERN_NOTICE "%s: %d bytes block size "
1032                                         "not supported\n", drive->name, length);
1033                         } else {
1034                                 floppy->blocks = blocks;
1035                                 floppy->block_size = length;
1036                                 floppy->bs_factor = length / 512;
1037                                 if (floppy->bs_factor != 1)
1038                                         printk(KERN_NOTICE "%s: warning: non "
1039                                                 "512 bytes block size not "
1040                                                 "fully supported\n",
1041                                                 drive->name);
1042                                 rc = 0;
1043                         }
1044                         break;
1045                 case CAPACITY_NO_CARTRIDGE:
1046                         /*
1047                          * This is a KERN_ERR so it appears on screen
1048                          * for the user to see
1049                          */
1050                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1051                         break;
1052                 case CAPACITY_INVALID:
1053                         printk(KERN_ERR "%s: Invalid capacity for disk "
1054                                 "in drive\n", drive->name);
1055                         break;
1056                 }
1057                 debug_log("Descriptor 0 Code: %d\n",
1058                           pc.buf[desc_start + 4] & 0x03);
1059         }
1060
1061         /* Clik! disk does not support get_flexible_disk_page */
1062         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1063                 (void) ide_floppy_get_flexible_disk_page(drive);
1064
1065         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1066         return rc;
1067 }
1068
1069 /*
1070  * Obtain the list of formattable capacities.
1071  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1072  * descriptors to userland, instead of our own structures.
1073  *
1074  * Userland gives us the following structure:
1075  *
1076  * struct idefloppy_format_capacities {
1077  *      int nformats;
1078  *      struct {
1079  *              int nblocks;
1080  *              int blocksize;
1081  *      } formats[];
1082  * };
1083  *
1084  * userland initializes nformats to the number of allocated formats[] records.
1085  * On exit we set nformats to the number of records we've actually initialized.
1086  */
1087
1088 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1089 {
1090         struct ide_atapi_pc pc;
1091         u8 header_len, desc_cnt;
1092         int i, blocks, length, u_array_size, u_index;
1093         int __user *argp;
1094
1095         if (get_user(u_array_size, arg))
1096                 return (-EFAULT);
1097
1098         if (u_array_size <= 0)
1099                 return (-EINVAL);
1100
1101         idefloppy_create_read_capacity_cmd(&pc);
1102         if (idefloppy_queue_pc_tail(drive, &pc)) {
1103                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1104                 return (-EIO);
1105         }
1106         header_len = pc.buf[3];
1107         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1108
1109         u_index = 0;
1110         argp = arg + 1;
1111
1112         /*
1113          * We always skip the first capacity descriptor.  That's the current
1114          * capacity.  We are interested in the remaining descriptors, the
1115          * formattable capacities.
1116          */
1117         for (i = 1; i < desc_cnt; i++) {
1118                 unsigned int desc_start = 4 + i*8;
1119
1120                 if (u_index >= u_array_size)
1121                         break;  /* User-supplied buffer too small */
1122
1123                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1124                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1125
1126                 if (put_user(blocks, argp))
1127                         return(-EFAULT);
1128                 ++argp;
1129
1130                 if (put_user(length, argp))
1131                         return (-EFAULT);
1132                 ++argp;
1133
1134                 ++u_index;
1135         }
1136
1137         if (put_user(u_index, arg))
1138                 return (-EFAULT);
1139         return (0);
1140 }
1141
1142 /*
1143  * Get ATAPI_FORMAT_UNIT progress indication.
1144  *
1145  * Userland gives a pointer to an int.  The int is set to a progress
1146  * indicator 0-65536, with 65536=100%.
1147  *
1148  * If the drive does not support format progress indication, we just check
1149  * the dsc bit, and return either 0 or 65536.
1150  */
1151
1152 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1153 {
1154         idefloppy_floppy_t *floppy = drive->driver_data;
1155         struct ide_atapi_pc pc;
1156         int progress_indication = 0x10000;
1157
1158         if (floppy->srfp) {
1159                 idefloppy_create_request_sense_cmd(&pc);
1160                 if (idefloppy_queue_pc_tail(drive, &pc))
1161                         return (-EIO);
1162
1163                 if (floppy->sense_key == 2 &&
1164                     floppy->asc == 4 &&
1165                     floppy->ascq == 4)
1166                         progress_indication = floppy->progress_indication;
1167
1168                 /* Else assume format_unit has finished, and we're at 0x10000 */
1169         } else {
1170                 unsigned long flags;
1171                 u8 stat;
1172
1173                 local_irq_save(flags);
1174                 stat = ide_read_status(drive);
1175                 local_irq_restore(flags);
1176
1177                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1178         }
1179         if (put_user(progress_indication, arg))
1180                 return (-EFAULT);
1181
1182         return (0);
1183 }
1184
1185 static sector_t idefloppy_capacity(ide_drive_t *drive)
1186 {
1187         idefloppy_floppy_t *floppy = drive->driver_data;
1188         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1189
1190         return capacity;
1191 }
1192
1193 /*
1194  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1195  * results.
1196  */
1197 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1198 {
1199         u8 gcw[2];
1200         u8 device_type, protocol, removable, drq_type, packet_size;
1201
1202         *((u16 *) &gcw) = id->config;
1203
1204         device_type =  gcw[1] & 0x1F;
1205         removable   = (gcw[0] & 0x80) >> 7;
1206         protocol    = (gcw[1] & 0xC0) >> 6;
1207         drq_type    = (gcw[0] & 0x60) >> 5;
1208         packet_size =  gcw[0] & 0x03;
1209
1210 #ifdef CONFIG_PPC
1211         /* kludge for Apple PowerBook internal zip */
1212         if (device_type == 5 &&
1213             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1214                 device_type = 0;
1215 #endif
1216
1217         if (protocol != 2)
1218                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1219                         protocol);
1220         else if (device_type != 0)
1221                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1222                                 "to floppy\n", device_type);
1223         else if (!removable)
1224                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1225         else if (drq_type == 3)
1226                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1227                                 "supported\n", drq_type);
1228         else if (packet_size != 0)
1229                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1230                                 "bytes\n", packet_size);
1231         else
1232                 return 1;
1233         return 0;
1234 }
1235
1236 #ifdef CONFIG_IDE_PROC_FS
1237 static void idefloppy_add_settings(ide_drive_t *drive)
1238 {
1239         idefloppy_floppy_t *floppy = drive->driver_data;
1240
1241         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1242                         &drive->bios_cyl, NULL);
1243         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1244                         &drive->bios_head, NULL);
1245         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1246                         &drive->bios_sect, NULL);
1247         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1248                         &floppy->ticks,  NULL);
1249 }
1250 #else
1251 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1252 #endif
1253
1254 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1255 {
1256         u8 gcw[2];
1257
1258         *((u16 *) &gcw) = drive->id->config;
1259         floppy->pc = floppy->pc_stack;
1260
1261         if (((gcw[0] & 0x60) >> 5) == 1)
1262                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1263         /*
1264          * We used to check revisions here. At this point however I'm giving up.
1265          * Just assume they are all broken, its easier.
1266          *
1267          * The actual reason for the workarounds was likely a driver bug after
1268          * all rather than a firmware bug, and the workaround below used to hide
1269          * it. It should be fixed as of version 1.9, but to be on the safe side
1270          * we'll leave the limitation below for the 2.2.x tree.
1271          */
1272         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1273                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1274                 /* This value will be visible in the /proc/ide/hdx/settings */
1275                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1276                 blk_queue_max_sectors(drive->queue, 64);
1277         }
1278
1279         /*
1280          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1281          * nasty clicking noises without it, so please don't remove this.
1282          */
1283         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1284                 blk_queue_max_sectors(drive->queue, 64);
1285                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1286         }
1287
1288         (void) ide_floppy_get_capacity(drive);
1289         idefloppy_add_settings(drive);
1290 }
1291
1292 static void ide_floppy_remove(ide_drive_t *drive)
1293 {
1294         idefloppy_floppy_t *floppy = drive->driver_data;
1295         struct gendisk *g = floppy->disk;
1296
1297         ide_proc_unregister_driver(drive, floppy->driver);
1298
1299         del_gendisk(g);
1300
1301         ide_floppy_put(floppy);
1302 }
1303
1304 static void idefloppy_cleanup_obj(struct kref *kref)
1305 {
1306         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1307         ide_drive_t *drive = floppy->drive;
1308         struct gendisk *g = floppy->disk;
1309
1310         drive->driver_data = NULL;
1311         g->private_data = NULL;
1312         put_disk(g);
1313         kfree(floppy);
1314 }
1315
1316 #ifdef CONFIG_IDE_PROC_FS
1317 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1318                 int count, int *eof, void *data)
1319 {
1320         ide_drive_t*drive = (ide_drive_t *)data;
1321         int len;
1322
1323         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1324         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1325 }
1326
1327 static ide_proc_entry_t idefloppy_proc[] = {
1328         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1329         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1330         { NULL, 0, NULL, NULL }
1331 };
1332 #endif  /* CONFIG_IDE_PROC_FS */
1333
1334 static int ide_floppy_probe(ide_drive_t *);
1335
1336 static ide_driver_t idefloppy_driver = {
1337         .gen_driver = {
1338                 .owner          = THIS_MODULE,
1339                 .name           = "ide-floppy",
1340                 .bus            = &ide_bus_type,
1341         },
1342         .probe                  = ide_floppy_probe,
1343         .remove                 = ide_floppy_remove,
1344         .version                = IDEFLOPPY_VERSION,
1345         .media                  = ide_floppy,
1346         .supports_dsc_overlap   = 0,
1347         .do_request             = idefloppy_do_request,
1348         .end_request            = idefloppy_end_request,
1349         .error                  = __ide_error,
1350         .abort                  = __ide_abort,
1351 #ifdef CONFIG_IDE_PROC_FS
1352         .proc                   = idefloppy_proc,
1353 #endif
1354 };
1355
1356 static int idefloppy_open(struct inode *inode, struct file *filp)
1357 {
1358         struct gendisk *disk = inode->i_bdev->bd_disk;
1359         struct ide_floppy_obj *floppy;
1360         ide_drive_t *drive;
1361         struct ide_atapi_pc pc;
1362         int ret = 0;
1363
1364         debug_log("Reached %s\n", __func__);
1365
1366         floppy = ide_floppy_get(disk);
1367         if (!floppy)
1368                 return -ENXIO;
1369
1370         drive = floppy->drive;
1371
1372         floppy->openers++;
1373
1374         if (floppy->openers == 1) {
1375                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1376                 /* Just in case */
1377
1378                 idefloppy_create_test_unit_ready_cmd(&pc);
1379                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1380                         idefloppy_create_start_stop_cmd(&pc, 1);
1381                         (void) idefloppy_queue_pc_tail(drive, &pc);
1382                 }
1383
1384                 if (ide_floppy_get_capacity(drive)
1385                    && (filp->f_flags & O_NDELAY) == 0
1386                     /*
1387                      * Allow O_NDELAY to open a drive without a disk, or with an
1388                      * unreadable disk, so that we can get the format capacity
1389                      * of the drive or begin the format - Sam
1390                      */
1391                     ) {
1392                         ret = -EIO;
1393                         goto out_put_floppy;
1394                 }
1395
1396                 if (floppy->wp && (filp->f_mode & 2)) {
1397                         ret = -EROFS;
1398                         goto out_put_floppy;
1399                 }
1400                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1401                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1402                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1403                         idefloppy_create_prevent_cmd(&pc, 1);
1404                         (void) idefloppy_queue_pc_tail(drive, &pc);
1405                 }
1406                 check_disk_change(inode->i_bdev);
1407         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1408                 ret = -EBUSY;
1409                 goto out_put_floppy;
1410         }
1411         return 0;
1412
1413 out_put_floppy:
1414         floppy->openers--;
1415         ide_floppy_put(floppy);
1416         return ret;
1417 }
1418
1419 static int idefloppy_release(struct inode *inode, struct file *filp)
1420 {
1421         struct gendisk *disk = inode->i_bdev->bd_disk;
1422         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1423         ide_drive_t *drive = floppy->drive;
1424         struct ide_atapi_pc pc;
1425
1426         debug_log("Reached %s\n", __func__);
1427
1428         if (floppy->openers == 1) {
1429                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1430                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1431                         idefloppy_create_prevent_cmd(&pc, 0);
1432                         (void) idefloppy_queue_pc_tail(drive, &pc);
1433                 }
1434
1435                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1436         }
1437
1438         floppy->openers--;
1439
1440         ide_floppy_put(floppy);
1441
1442         return 0;
1443 }
1444
1445 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1446 {
1447         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1448         ide_drive_t *drive = floppy->drive;
1449
1450         geo->heads = drive->bios_head;
1451         geo->sectors = drive->bios_sect;
1452         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1453         return 0;
1454 }
1455
1456 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1457                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1458 {
1459         if (floppy->openers > 1)
1460                 return -EBUSY;
1461
1462         /* The IOMEGA Clik! Drive doesn't support this command -
1463          * no room for an eject mechanism */
1464         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1465                 int prevent = arg ? 1 : 0;
1466
1467                 if (cmd == CDROMEJECT)
1468                         prevent = 0;
1469
1470                 idefloppy_create_prevent_cmd(pc, prevent);
1471                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1472         }
1473
1474         if (cmd == CDROMEJECT) {
1475                 idefloppy_create_start_stop_cmd(pc, 2);
1476                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1477         }
1478
1479         return 0;
1480 }
1481
1482 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1483                                   int __user *arg)
1484 {
1485         int blocks, length, flags, err = 0;
1486         struct ide_atapi_pc pc;
1487
1488         if (floppy->openers > 1) {
1489                 /* Don't format if someone is using the disk */
1490                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1491                 return -EBUSY;
1492         }
1493
1494         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1495
1496         /*
1497          * Send ATAPI_FORMAT_UNIT to the drive.
1498          *
1499          * Userland gives us the following structure:
1500          *
1501          * struct idefloppy_format_command {
1502          *        int nblocks;
1503          *        int blocksize;
1504          *        int flags;
1505          *        } ;
1506          *
1507          * flags is a bitmask, currently, the only defined flag is:
1508          *
1509          *        0x01 - verify media after format.
1510          */
1511         if (get_user(blocks, arg) ||
1512                         get_user(length, arg+1) ||
1513                         get_user(flags, arg+2)) {
1514                 err = -EFAULT;
1515                 goto out;
1516         }
1517
1518         (void) idefloppy_get_sfrp_bit(floppy->drive);
1519         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1520
1521         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1522                 err = -EIO;
1523
1524 out:
1525         if (err)
1526                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1527         return err;
1528 }
1529
1530
1531 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1532                         unsigned int cmd, unsigned long arg)
1533 {
1534         struct block_device *bdev = inode->i_bdev;
1535         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1536         ide_drive_t *drive = floppy->drive;
1537         struct ide_atapi_pc pc;
1538         void __user *argp = (void __user *)arg;
1539         int err;
1540
1541         switch (cmd) {
1542         case CDROMEJECT:
1543                 /* fall through */
1544         case CDROM_LOCKDOOR:
1545                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1546         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1547                 return 0;
1548         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1549                 return ide_floppy_get_format_capacities(drive, argp);
1550         case IDEFLOPPY_IOCTL_FORMAT_START:
1551                 if (!(file->f_mode & 2))
1552                         return -EPERM;
1553
1554                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1555         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1556                 return idefloppy_get_format_progress(drive, argp);
1557         }
1558
1559         /*
1560          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1561          * and CDROM_SEND_PACKET (legacy) ioctls
1562          */
1563         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1564                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1565                                         bdev->bd_disk, cmd, argp);
1566         else
1567                 err = -ENOTTY;
1568
1569         if (err == -ENOTTY)
1570                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1571
1572         return err;
1573 }
1574
1575 static int idefloppy_media_changed(struct gendisk *disk)
1576 {
1577         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1578         ide_drive_t *drive = floppy->drive;
1579         int ret;
1580
1581         /* do not scan partitions twice if this is a removable device */
1582         if (drive->attach) {
1583                 drive->attach = 0;
1584                 return 0;
1585         }
1586         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1587         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1588         return ret;
1589 }
1590
1591 static int idefloppy_revalidate_disk(struct gendisk *disk)
1592 {
1593         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1594         set_capacity(disk, idefloppy_capacity(floppy->drive));
1595         return 0;
1596 }
1597
1598 static struct block_device_operations idefloppy_ops = {
1599         .owner          = THIS_MODULE,
1600         .open           = idefloppy_open,
1601         .release        = idefloppy_release,
1602         .ioctl          = idefloppy_ioctl,
1603         .getgeo         = idefloppy_getgeo,
1604         .media_changed  = idefloppy_media_changed,
1605         .revalidate_disk= idefloppy_revalidate_disk
1606 };
1607
1608 static int ide_floppy_probe(ide_drive_t *drive)
1609 {
1610         idefloppy_floppy_t *floppy;
1611         struct gendisk *g;
1612
1613         if (!strstr("ide-floppy", drive->driver_req))
1614                 goto failed;
1615         if (!drive->present)
1616                 goto failed;
1617         if (drive->media != ide_floppy)
1618                 goto failed;
1619         if (!idefloppy_identify_device(drive, drive->id)) {
1620                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1621                                 " of ide-floppy\n", drive->name);
1622                 goto failed;
1623         }
1624         if (drive->scsi) {
1625                 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
1626                                 " emulation.\n", drive->name);
1627                 goto failed;
1628         }
1629         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1630         if (!floppy) {
1631                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1632                                 " structure\n", drive->name);
1633                 goto failed;
1634         }
1635
1636         g = alloc_disk(1 << PARTN_BITS);
1637         if (!g)
1638                 goto out_free_floppy;
1639
1640         ide_init_disk(g, drive);
1641
1642         ide_proc_register_driver(drive, &idefloppy_driver);
1643
1644         kref_init(&floppy->kref);
1645
1646         floppy->drive = drive;
1647         floppy->driver = &idefloppy_driver;
1648         floppy->disk = g;
1649
1650         g->private_data = &floppy->driver;
1651
1652         drive->driver_data = floppy;
1653
1654         idefloppy_setup(drive, floppy);
1655
1656         g->minors = 1 << PARTN_BITS;
1657         g->driverfs_dev = &drive->gendev;
1658         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1659         g->fops = &idefloppy_ops;
1660         drive->attach = 1;
1661         add_disk(g);
1662         return 0;
1663
1664 out_free_floppy:
1665         kfree(floppy);
1666 failed:
1667         return -ENODEV;
1668 }
1669
1670 static void __exit idefloppy_exit(void)
1671 {
1672         driver_unregister(&idefloppy_driver.gen_driver);
1673 }
1674
1675 static int __init idefloppy_init(void)
1676 {
1677         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1678         return driver_register(&idefloppy_driver.gen_driver);
1679 }
1680
1681 MODULE_ALIAS("ide:*m-floppy*");
1682 module_init(idefloppy_init);
1683 module_exit(idefloppy_exit);
1684 MODULE_LICENSE("GPL");
1685 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1686