drivers/ide/ide-iops.c

   1 /*
   2  *  Copyright (C) 2000-2002     Andre Hedrick <andre@linux-ide.org>
   3  *  Copyright (C) 2003          Red Hat <alan@redhat.com>
   4  *
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/types.h>
   9 #include <linux/string.h>
  10 #include <linux/kernel.h>
  11 #include <linux/timer.h>
  12 #include <linux/mm.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/major.h>
  15 #include <linux/errno.h>
  16 #include <linux/genhd.h>
  17 #include <linux/blkpg.h>
  18 #include <linux/slab.h>
  19 #include <linux/pci.h>
  20 #include <linux/delay.h>
  21 #include <linux/hdreg.h>
  22 #include <linux/ide.h>
  23 #include <linux/bitops.h>
  24 #include <linux/nmi.h>
  25
  26 #include <asm/byteorder.h>
  27 #include <asm/irq.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/io.h>
  30
  31 /*
  32  *      Conventional PIO operations for ATA devices
  33  */
  34
  35 static u8 ide_inb (unsigned long port)
  36 {
  37         return (u8) inb(port);
  38 }
  39
  40 static u16 ide_inw (unsigned long port)
  41 {
  42         return (u16) inw(port);
  43 }
  44
  45 static void ide_outb (u8 val, unsigned long port)
  46 {
  47         outb(val, port);
  48 }
  49
  50 static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port)
  51 {
  52         outb(addr, port);
  53 }
  54
  55 static void ide_outw (u16 val, unsigned long port)
  56 {
  57         outw(val, port);
  58 }
  59
  60 void default_hwif_iops (ide_hwif_t *hwif)
  61 {
  62         hwif->OUTB      = ide_outb;
  63         hwif->OUTBSYNC  = ide_outbsync;
  64         hwif->OUTW      = ide_outw;
  65         hwif->INB       = ide_inb;
  66         hwif->INW       = ide_inw;
  67 }
  68
  69 /*
  70  *      MMIO operations, typically used for SATA controllers
  71  */
  72
  73 static u8 ide_mm_inb (unsigned long port)
  74 {
  75         return (u8) readb((void __iomem *) port);
  76 }
  77
  78 static u16 ide_mm_inw (unsigned long port)
  79 {
  80         return (u16) readw((void __iomem *) port);
  81 }
  82
  83 static void ide_mm_outb (u8 value, unsigned long port)
  84 {
  85         writeb(value, (void __iomem *) port);
  86 }
  87
  88 static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port)
  89 {
  90         writeb(value, (void __iomem *) port);
  91 }
  92
  93 static void ide_mm_outw (u16 value, unsigned long port)
  94 {
  95         writew(value, (void __iomem *) port);
  96 }
  97
  98 void default_hwif_mmiops (ide_hwif_t *hwif)
  99 {
 100         hwif->OUTB      = ide_mm_outb;
 101         /* Most systems will need to override OUTBSYNC, alas however
 102            this one is controller specific! */
 103         hwif->OUTBSYNC  = ide_mm_outbsync;
 104         hwif->OUTW      = ide_mm_outw;
 105         hwif->INB       = ide_mm_inb;
 106         hwif->INW       = ide_mm_inw;
 107 }
 108
 109 EXPORT_SYMBOL(default_hwif_mmiops);
 110
 111 void SELECT_DRIVE (ide_drive_t *drive)
 112 {
 113         ide_hwif_t *hwif = drive->hwif;
 114         const struct ide_port_ops *port_ops = hwif->port_ops;
 115
 116         if (port_ops && port_ops->selectproc)
 117                 port_ops->selectproc(drive);
 118
 119         hwif->OUTB(drive->select.all, hwif->io_ports.device_addr);
 120 }
 121
 122 void SELECT_MASK (ide_drive_t *drive, int mask)
 123 {
 124         const struct ide_port_ops *port_ops = drive->hwif->port_ops;
 125
 126         if (port_ops && port_ops->maskproc)
 127                 port_ops->maskproc(drive, mask);
 128 }
 129
 130 static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
 131 {
 132         ide_hwif_t *hwif = drive->hwif;
 133         struct ide_io_ports *io_ports = &hwif->io_ports;
 134         struct ide_taskfile *tf = &task->tf;
 135         void (*tf_outb)(u8 addr, unsigned long port);
 136         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 137         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
 138
 139         if (mmio)
 140                 tf_outb = ide_mm_outb;
 141         else
 142                 tf_outb = ide_outb;
 143
 144         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 145                 HIHI = 0xFF;
 146
 147         ide_set_irq(drive, 1);
 148
 149         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
 150                 SELECT_MASK(drive, 0);
 151
 152         if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
 153                 u16 data = (tf->hob_data << 8) | tf->data;
 154
 155                 if (mmio)
 156                         writew(data, (void __iomem *)io_ports->data_addr);
 157                 else
 158                         outw(data, io_ports->data_addr);
 159         }
 160
 161         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
 162                 tf_outb(tf->hob_feature, io_ports->feature_addr);
 163         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
 164                 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
 165         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
 166                 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
 167         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
 168                 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
 169         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
 170                 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
 171
 172         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
 173                 tf_outb(tf->feature, io_ports->feature_addr);
 174         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
 175                 tf_outb(tf->nsect, io_ports->nsect_addr);
 176         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
 177                 tf_outb(tf->lbal, io_ports->lbal_addr);
 178         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
 179                 tf_outb(tf->lbam, io_ports->lbam_addr);
 180         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
 181                 tf_outb(tf->lbah, io_ports->lbah_addr);
 182
 183         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
 184                 tf_outb((tf->device & HIHI) | drive->select.all,
 185                          io_ports->device_addr);
 186 }
 187
 188 static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
 189 {
 190         ide_hwif_t *hwif = drive->hwif;
 191         struct ide_io_ports *io_ports = &hwif->io_ports;
 192         struct ide_taskfile *tf = &task->tf;
 193         void (*tf_outb)(u8 addr, unsigned long port);
 194         u8 (*tf_inb)(unsigned long port);
 195         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 196
 197         if (mmio) {
 198                 tf_outb = ide_mm_outb;
 199                 tf_inb  = ide_mm_inb;
 200         } else {
 201                 tf_outb = ide_outb;
 202                 tf_inb  = ide_inb;
 203         }
 204
 205         if (task->tf_flags & IDE_TFLAG_IN_DATA) {
 206                 u16 data;
 207
 208                 if (mmio)
 209                         data = readw((void __iomem *)io_ports->data_addr);
 210                 else
 211                         data = inw(io_ports->data_addr);
 212
 213                 tf->data = data & 0xff;
 214                 tf->hob_data = (data >> 8) & 0xff;
 215         }
 216
 217         /* be sure we're looking at the low order bits */
 218         tf_outb(drive->ctl & ~0x80, io_ports->ctl_addr);
 219
 220         if (task->tf_flags & IDE_TFLAG_IN_NSECT)
 221                 tf->nsect  = tf_inb(io_ports->nsect_addr);
 222         if (task->tf_flags & IDE_TFLAG_IN_LBAL)
 223                 tf->lbal   = tf_inb(io_ports->lbal_addr);
 224         if (task->tf_flags & IDE_TFLAG_IN_LBAM)
 225                 tf->lbam   = tf_inb(io_ports->lbam_addr);
 226         if (task->tf_flags & IDE_TFLAG_IN_LBAH)
 227                 tf->lbah   = tf_inb(io_ports->lbah_addr);
 228         if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
 229                 tf->device = tf_inb(io_ports->device_addr);
 230
 231         if (task->tf_flags & IDE_TFLAG_LBA48) {
 232                 tf_outb(drive->ctl | 0x80, io_ports->ctl_addr);
 233
 234                 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
 235                         tf->hob_feature = tf_inb(io_ports->feature_addr);
 236                 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
 237                         tf->hob_nsect   = tf_inb(io_ports->nsect_addr);
 238                 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
 239                         tf->hob_lbal    = tf_inb(io_ports->lbal_addr);
 240                 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
 241                         tf->hob_lbam    = tf_inb(io_ports->lbam_addr);
 242                 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
 243                         tf->hob_lbah    = tf_inb(io_ports->lbah_addr);
 244         }
 245 }
 246
 247 /*
 248  * Some localbus EIDE interfaces require a special access sequence
 249  * when using 32-bit I/O instructions to transfer data.  We call this
 250  * the "vlb_sync" sequence, which consists of three successive reads
 251  * of the sector count register location, with interrupts disabled
 252  * to ensure that the reads all happen together.
 253  */
 254 static void ata_vlb_sync(ide_drive_t *drive, unsigned long port)
 255 {
 256         (void) HWIF(drive)->INB(port);
 257         (void) HWIF(drive)->INB(port);
 258         (void) HWIF(drive)->INB(port);
 259 }
 260
 261 /*
 262  * This is used for most PIO data transfers *from* the IDE interface
 263  *
 264  * These routines will round up any request for an odd number of bytes,
 265  * so if an odd len is specified, be sure that there's at least one
 266  * extra byte allocated for the buffer.
 267  */
 268 static void ata_input_data(ide_drive_t *drive, struct request *rq,
 269                            void *buf, unsigned int len)
 270 {
 271         ide_hwif_t *hwif = drive->hwif;
 272         struct ide_io_ports *io_ports = &hwif->io_ports;
 273         unsigned long data_addr = io_ports->data_addr;
 274         u8 io_32bit = drive->io_32bit;
 275         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 276
 277         len++;
 278
 279         if (io_32bit) {
 280                 unsigned long uninitialized_var(flags);
 281
 282                 if (io_32bit & 2) {
 283                         local_irq_save(flags);
 284                         ata_vlb_sync(drive, io_ports->nsect_addr);
 285                 }
 286
 287                 if (mmio)
 288                         __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
 289                 else
 290                         insl(data_addr, buf, len / 4);
 291
 292                 if (io_32bit & 2)
 293                         local_irq_restore(flags);
 294
 295                 if ((len & 3) >= 2) {
 296                         if (mmio)
 297                                 __ide_mm_insw((void __iomem *)data_addr,
 298                                                 (u8 *)buf + (len & ~3), 1);
 299                         else
 300                                 insw(data_addr, (u8 *)buf + (len & ~3), 1);
 301                 }
 302         } else {
 303                 if (mmio)
 304                         __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
 305                 else
 306                         insw(data_addr, buf, len / 2);
 307         }
 308 }
 309
 310 /*
 311  * This is used for most PIO data transfers *to* the IDE interface
 312  */
 313 static void ata_output_data(ide_drive_t *drive, struct request *rq,
 314                             void *buf, unsigned int len)
 315 {
 316         ide_hwif_t *hwif = drive->hwif;
 317         struct ide_io_ports *io_ports = &hwif->io_ports;
 318         unsigned long data_addr = io_ports->data_addr;
 319         u8 io_32bit = drive->io_32bit;
 320         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 321
 322         if (io_32bit) {
 323                 unsigned long uninitialized_var(flags);
 324
 325                 if (io_32bit & 2) {
 326                         local_irq_save(flags);
 327                         ata_vlb_sync(drive, io_ports->nsect_addr);
 328                 }
 329
 330                 if (mmio)
 331                         __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
 332                 else
 333                         outsl(data_addr, buf, len / 4);
 334
 335                 if (io_32bit & 2)
 336                         local_irq_restore(flags);
 337
 338                 if ((len & 3) >= 2) {
 339                         if (mmio)
 340                                 __ide_mm_outsw((void __iomem *)data_addr,
 341                                                  (u8 *)buf + (len & ~3), 1);
 342                         else
 343                                 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
 344                 }
 345         } else {
 346                 if (mmio)
 347                         __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
 348                 else
 349                         outsw(data_addr, buf, len / 2);
 350         }
 351 }
 352
 353 void default_hwif_transport(ide_hwif_t *hwif)
 354 {
 355         hwif->tf_load     = ide_tf_load;
 356         hwif->tf_read     = ide_tf_read;
 357
 358         hwif->input_data  = ata_input_data;
 359         hwif->output_data = ata_output_data;
 360 }
 361
 362 void ide_fix_driveid (struct hd_driveid *id)
 363 {
 364 #ifndef __LITTLE_ENDIAN
 365 # ifdef __BIG_ENDIAN
 366         int i;
 367         u16 *stringcast;
 368
 369         id->config         = __le16_to_cpu(id->config);
 370         id->cyls           = __le16_to_cpu(id->cyls);
 371         id->reserved2      = __le16_to_cpu(id->reserved2);
 372         id->heads          = __le16_to_cpu(id->heads);
 373         id->track_bytes    = __le16_to_cpu(id->track_bytes);
 374         id->sector_bytes   = __le16_to_cpu(id->sector_bytes);
 375         id->sectors        = __le16_to_cpu(id->sectors);
 376         id->vendor0        = __le16_to_cpu(id->vendor0);
 377         id->vendor1        = __le16_to_cpu(id->vendor1);
 378         id->vendor2        = __le16_to_cpu(id->vendor2);
 379         stringcast = (u16 *)&id->serial_no[0];
 380         for (i = 0; i < (20/2); i++)
 381                 stringcast[i] = __le16_to_cpu(stringcast[i]);
 382         id->buf_type       = __le16_to_cpu(id->buf_type);
 383         id->buf_size       = __le16_to_cpu(id->buf_size);
 384         id->ecc_bytes      = __le16_to_cpu(id->ecc_bytes);
 385         stringcast = (u16 *)&id->fw_rev[0];
 386         for (i = 0; i < (8/2); i++)
 387                 stringcast[i] = __le16_to_cpu(stringcast[i]);
 388         stringcast = (u16 *)&id->model[0];
 389         for (i = 0; i < (40/2); i++)
 390                 stringcast[i] = __le16_to_cpu(stringcast[i]);
 391         id->dword_io       = __le16_to_cpu(id->dword_io);
 392         id->reserved50     = __le16_to_cpu(id->reserved50);
 393         id->field_valid    = __le16_to_cpu(id->field_valid);
 394         id->cur_cyls       = __le16_to_cpu(id->cur_cyls);
 395         id->cur_heads      = __le16_to_cpu(id->cur_heads);
 396         id->cur_sectors    = __le16_to_cpu(id->cur_sectors);
 397         id->cur_capacity0  = __le16_to_cpu(id->cur_capacity0);
 398         id->cur_capacity1  = __le16_to_cpu(id->cur_capacity1);
 399         id->lba_capacity   = __le32_to_cpu(id->lba_capacity);
 400         id->dma_1word      = __le16_to_cpu(id->dma_1word);
 401         id->dma_mword      = __le16_to_cpu(id->dma_mword);
 402         id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
 403         id->eide_dma_min   = __le16_to_cpu(id->eide_dma_min);
 404         id->eide_dma_time  = __le16_to_cpu(id->eide_dma_time);
 405         id->eide_pio       = __le16_to_cpu(id->eide_pio);
 406         id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
 407         for (i = 0; i < 2; ++i)
 408                 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
 409         for (i = 0; i < 4; ++i)
 410                 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
 411         id->queue_depth    = __le16_to_cpu(id->queue_depth);
 412         for (i = 0; i < 4; ++i)
 413                 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
 414         id->major_rev_num  = __le16_to_cpu(id->major_rev_num);
 415         id->minor_rev_num  = __le16_to_cpu(id->minor_rev_num);
 416         id->command_set_1  = __le16_to_cpu(id->command_set_1);
 417         id->command_set_2  = __le16_to_cpu(id->command_set_2);
 418         id->cfsse          = __le16_to_cpu(id->cfsse);
 419         id->cfs_enable_1   = __le16_to_cpu(id->cfs_enable_1);
 420         id->cfs_enable_2   = __le16_to_cpu(id->cfs_enable_2);
 421         id->csf_default    = __le16_to_cpu(id->csf_default);
 422         id->dma_ultra      = __le16_to_cpu(id->dma_ultra);
 423         id->trseuc         = __le16_to_cpu(id->trseuc);
 424         id->trsEuc         = __le16_to_cpu(id->trsEuc);
 425         id->CurAPMvalues   = __le16_to_cpu(id->CurAPMvalues);
 426         id->mprc           = __le16_to_cpu(id->mprc);
 427         id->hw_config      = __le16_to_cpu(id->hw_config);
 428         id->acoustic       = __le16_to_cpu(id->acoustic);
 429         id->msrqs          = __le16_to_cpu(id->msrqs);
 430         id->sxfert         = __le16_to_cpu(id->sxfert);
 431         id->sal            = __le16_to_cpu(id->sal);
 432         id->spg            = __le32_to_cpu(id->spg);
 433         id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
 434         for (i = 0; i < 22; i++)
 435                 id->words104_125[i]   = __le16_to_cpu(id->words104_125[i]);
 436         id->last_lun       = __le16_to_cpu(id->last_lun);
 437         id->word127        = __le16_to_cpu(id->word127);
 438         id->dlf            = __le16_to_cpu(id->dlf);
 439         id->csfo           = __le16_to_cpu(id->csfo);
 440         for (i = 0; i < 26; i++)
 441                 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
 442         id->word156        = __le16_to_cpu(id->word156);
 443         for (i = 0; i < 3; i++)
 444                 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
 445         id->cfa_power      = __le16_to_cpu(id->cfa_power);
 446         for (i = 0; i < 14; i++)
 447                 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
 448         for (i = 0; i < 31; i++)
 449                 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
 450         for (i = 0; i < 48; i++)
 451                 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
 452         id->integrity_word  = __le16_to_cpu(id->integrity_word);
 453 # else
 454 #  error "Please fix <asm/byteorder.h>"
 455 # endif
 456 #endif
 457 }
 458
 459 /*
 460  * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
 461  * removing leading/trailing blanks and compressing internal blanks.
 462  * It is primarily used to tidy up the model name/number fields as
 463  * returned by the WIN_[P]IDENTIFY commands.
 464  */
 465
 466 void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
 467 {
 468         u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
 469
 470         if (byteswap) {
 471                 /* convert from big-endian to host byte order */
 472                 for (p = end ; p != s;) {
 473                         unsigned short *pp = (unsigned short *) (p -= 2);
 474                         *pp = ntohs(*pp);
 475                 }
 476         }
 477         /* strip leading blanks */
 478         while (s != end && *s == ' ')
 479                 ++s;
 480         /* compress internal blanks and strip trailing blanks */
 481         while (s != end && *s) {
 482                 if (*s++ != ' ' || (s != end && *s && *s != ' '))
 483                         *p++ = *(s-1);
 484         }
 485         /* wipe out trailing garbage */
 486         while (p != end)
 487                 *p++ = '\0';
 488 }
 489
 490 EXPORT_SYMBOL(ide_fixstring);
 491
 492 /*
 493  * Needed for PCI irq sharing
 494  */
 495 int drive_is_ready (ide_drive_t *drive)
 496 {
 497         ide_hwif_t *hwif        = HWIF(drive);
 498         u8 stat                 = 0;
 499
 500         if (drive->waiting_for_dma)
 501                 return hwif->dma_ops->dma_test_irq(drive);
 502
 503 #if 0
 504         /* need to guarantee 400ns since last command was issued */
 505         udelay(1);
 506 #endif
 507
 508         /*
 509          * We do a passive status test under shared PCI interrupts on
 510          * cards that truly share the ATA side interrupt, but may also share
 511          * an interrupt with another pci card/device.  We make no assumptions
 512          * about possible isa-pnp and pci-pnp issues yet.
 513          */
 514         if (hwif->io_ports.ctl_addr)
 515                 stat = ide_read_altstatus(drive);
 516         else
 517                 /* Note: this may clear a pending IRQ!! */
 518                 stat = ide_read_status(drive);
 519
 520         if (stat & BUSY_STAT)
 521                 /* drive busy:  definitely not interrupting */
 522                 return 0;
 523
 524         /* drive ready: *might* be interrupting */
 525         return 1;
 526 }
 527
 528 EXPORT_SYMBOL(drive_is_ready);
 529
 530 /*
 531  * This routine busy-waits for the drive status to be not "busy".
 532  * It then checks the status for all of the "good" bits and none
 533  * of the "bad" bits, and if all is okay it returns 0.  All other
 534  * cases return error -- caller may then invoke ide_error().
 535  *
 536  * This routine should get fixed to not hog the cpu during extra long waits..
 537  * That could be done by busy-waiting for the first jiffy or two, and then
 538  * setting a timer to wake up at half second intervals thereafter,
 539  * until timeout is achieved, before timing out.
 540  */
 541 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
 542 {
 543         unsigned long flags;
 544         int i;
 545         u8 stat;
 546
 547         udelay(1);      /* spec allows drive 400ns to assert "BUSY" */
 548         stat = ide_read_status(drive);
 549
 550         if (stat & BUSY_STAT) {
 551                 local_irq_set(flags);
 552                 timeout += jiffies;
 553                 while ((stat = ide_read_status(drive)) & BUSY_STAT) {
 554                         if (time_after(jiffies, timeout)) {
 555                                 /*
 556                                  * One last read after the timeout in case
 557                                  * heavy interrupt load made us not make any
 558                                  * progress during the timeout..
 559                                  */
 560                                 stat = ide_read_status(drive);
 561                                 if (!(stat & BUSY_STAT))
 562                                         break;
 563
 564                                 local_irq_restore(flags);
 565                                 *rstat = stat;
 566                                 return -EBUSY;
 567                         }
 568                 }
 569                 local_irq_restore(flags);
 570         }
 571         /*
 572          * Allow status to settle, then read it again.
 573          * A few rare drives vastly violate the 400ns spec here,
 574          * so we'll wait up to 10usec for a "good" status
 575          * rather than expensively fail things immediately.
 576          * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
 577          */
 578         for (i = 0; i < 10; i++) {
 579                 udelay(1);
 580                 stat = ide_read_status(drive);
 581
 582                 if (OK_STAT(stat, good, bad)) {
 583                         *rstat = stat;
 584                         return 0;
 585                 }
 586         }
 587         *rstat = stat;
 588         return -EFAULT;
 589 }
 590
 591 /*
 592  * In case of error returns error value after doing "*startstop = ide_error()".
 593  * The caller should return the updated value of "startstop" in this case,
 594  * "startstop" is unchanged when the function returns 0.
 595  */
 596 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
 597 {
 598         int err;
 599         u8 stat;
 600
 601         /* bail early if we've exceeded max_failures */
 602         if (drive->max_failures && (drive->failures > drive->max_failures)) {
 603                 *startstop = ide_stopped;
 604                 return 1;
 605         }
 606
 607         err = __ide_wait_stat(drive, good, bad, timeout, &stat);
 608
 609         if (err) {
 610                 char *s = (err == -EBUSY) ? "status timeout" : "status error";
 611                 *startstop = ide_error(drive, s, stat);
 612         }
 613
 614         return err;
 615 }
 616
 617 EXPORT_SYMBOL(ide_wait_stat);
 618
 619 /**
 620  *      ide_in_drive_list       -       look for drive in black/white list
 621  *      @id: drive identifier
 622  *      @drive_table: list to inspect
 623  *
 624  *      Look for a drive in the blacklist and the whitelist tables
 625  *      Returns 1 if the drive is found in the table.
 626  */
 627
 628 int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
 629 {
 630         for ( ; drive_table->id_model; drive_table++)
 631                 if ((!strcmp(drive_table->id_model, id->model)) &&
 632                     (!drive_table->id_firmware ||
 633                      strstr(id->fw_rev, drive_table->id_firmware)))
 634                         return 1;
 635         return 0;
 636 }
 637
 638 EXPORT_SYMBOL_GPL(ide_in_drive_list);
 639
 640 /*
 641  * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
 642  * We list them here and depend on the device side cable detection for them.
 643  *
 644  * Some optical devices with the buggy firmwares have the same problem.
 645  */
 646 static const struct drive_list_entry ivb_list[] = {
 647         { "QUANTUM FIREBALLlct10 05"    , "A03.0900"    },
 648         { "TSSTcorp CDDVDW SH-S202J"    , "SB00"        },
 649         { "TSSTcorp CDDVDW SH-S202J"    , "SB01"        },
 650         { "TSSTcorp CDDVDW SH-S202N"    , "SB00"        },
 651         { "TSSTcorp CDDVDW SH-S202N"    , "SB01"        },
 652         { NULL                          , NULL          }
 653 };
 654
 655 /*
 656  *  All hosts that use the 80c ribbon must use!
 657  *  The name is derived from upper byte of word 93 and the 80c ribbon.
 658  */
 659 u8 eighty_ninty_three (ide_drive_t *drive)
 660 {
 661         ide_hwif_t *hwif = drive->hwif;
 662         struct hd_driveid *id = drive->id;
 663         int ivb = ide_in_drive_list(id, ivb_list);
 664
 665         if (hwif->cbl == ATA_CBL_PATA40_SHORT)
 666                 return 1;
 667
 668         if (ivb)
 669                 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
 670                                   drive->name);
 671
 672         if (ide_dev_is_sata(id) && !ivb)
 673                 return 1;
 674
 675         if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
 676                 goto no_80w;
 677
 678         /*
 679          * FIXME:
 680          * - change master/slave IDENTIFY order
 681          * - force bit13 (80c cable present) check also for !ivb devices
 682          *   (unless the slave device is pre-ATA3)
 683          */
 684         if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
 685                 return 1;
 686
 687 no_80w:
 688         if (drive->udma33_warned == 1)
 689                 return 0;
 690
 691         printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
 692                             "limiting max speed to UDMA33\n",
 693                             drive->name,
 694                             hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
 695
 696         drive->udma33_warned = 1;
 697
 698         return 0;
 699 }
 700
 701 int ide_driveid_update(ide_drive_t *drive)
 702 {
 703         ide_hwif_t *hwif = drive->hwif;
 704         struct hd_driveid *id;
 705         unsigned long timeout, flags;
 706         u8 stat;
 707
 708         /*
 709          * Re-read drive->id for possible DMA mode
 710          * change (copied from ide-probe.c)
 711          */
 712
 713         SELECT_MASK(drive, 1);
 714         ide_set_irq(drive, 1);
 715         msleep(50);
 716         hwif->OUTBSYNC(drive, WIN_IDENTIFY, hwif->io_ports.command_addr);
 717         timeout = jiffies + WAIT_WORSTCASE;
 718         do {
 719                 if (time_after(jiffies, timeout)) {
 720                         SELECT_MASK(drive, 0);
 721                         return 0;       /* drive timed-out */
 722                 }
 723
 724                 msleep(50);     /* give drive a breather */
 725                 stat = ide_read_altstatus(drive);
 726         } while (stat & BUSY_STAT);
 727
 728         msleep(50);     /* wait for IRQ and DRQ_STAT */
 729         stat = ide_read_status(drive);
 730
 731         if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
 732                 SELECT_MASK(drive, 0);
 733                 printk("%s: CHECK for good STATUS\n", drive->name);
 734                 return 0;
 735         }
 736         local_irq_save(flags);
 737         SELECT_MASK(drive, 0);
 738         id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
 739         if (!id) {
 740                 local_irq_restore(flags);
 741                 return 0;
 742         }
 743         hwif->input_data(drive, NULL, id, SECTOR_SIZE);
 744         (void)ide_read_status(drive);   /* clear drive IRQ */
 745         local_irq_enable();
 746         local_irq_restore(flags);
 747         ide_fix_driveid(id);
 748         if (id) {
 749                 drive->id->dma_ultra = id->dma_ultra;
 750                 drive->id->dma_mword = id->dma_mword;
 751                 drive->id->dma_1word = id->dma_1word;
 752                 /* anything more ? */
 753                 kfree(id);
 754
 755                 if (drive->using_dma && ide_id_dma_bug(drive))
 756                         ide_dma_off(drive);
 757         }
 758
 759         return 1;
 760 }
 761
 762 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
 763 {
 764         ide_hwif_t *hwif = drive->hwif;
 765         struct ide_io_ports *io_ports = &hwif->io_ports;
 766         int error = 0;
 767         u8 stat;
 768
 769 //      while (HWGROUP(drive)->busy)
 770 //              msleep(50);
 771
 772 #ifdef CONFIG_BLK_DEV_IDEDMA
 773         if (hwif->dma_ops)      /* check if host supports DMA */
 774                 hwif->dma_ops->dma_host_set(drive, 0);
 775 #endif
 776
 777         /* Skip setting PIO flow-control modes on pre-EIDE drives */
 778         if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
 779                 goto skip;
 780
 781         /*
 782          * Don't use ide_wait_cmd here - it will
 783          * attempt to set_geometry and recalibrate,
 784          * but for some reason these don't work at
 785          * this point (lost interrupt).
 786          */
 787         /*
 788          * Select the drive, and issue the SETFEATURES command
 789          */
 790         disable_irq_nosync(hwif->irq);
 791
 792         /*
 793          *      FIXME: we race against the running IRQ here if
 794          *      this is called from non IRQ context. If we use
 795          *      disable_irq() we hang on the error path. Work
 796          *      is needed.
 797          */
 798
 799         udelay(1);
 800         SELECT_DRIVE(drive);
 801         SELECT_MASK(drive, 0);
 802         udelay(1);
 803         ide_set_irq(drive, 0);
 804         hwif->OUTB(speed, io_ports->nsect_addr);
 805         hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
 806         hwif->OUTBSYNC(drive, WIN_SETFEATURES, io_ports->command_addr);
 807         if (drive->quirk_list == 2)
 808                 ide_set_irq(drive, 1);
 809
 810         error = __ide_wait_stat(drive, drive->ready_stat,
 811                                 BUSY_STAT|DRQ_STAT|ERR_STAT,
 812                                 WAIT_CMD, &stat);
 813
 814         SELECT_MASK(drive, 0);
 815
 816         enable_irq(hwif->irq);
 817
 818         if (error) {
 819                 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
 820                 return error;
 821         }
 822
 823         drive->id->dma_ultra &= ~0xFF00;
 824         drive->id->dma_mword &= ~0x0F00;
 825         drive->id->dma_1word &= ~0x0F00;
 826
 827  skip:
 828 #ifdef CONFIG_BLK_DEV_IDEDMA
 829         if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) &&
 830             drive->using_dma)
 831                 hwif->dma_ops->dma_host_set(drive, 1);
 832         else if (hwif->dma_ops) /* check if host supports DMA */
 833                 ide_dma_off_quietly(drive);
 834 #endif
 835
 836         switch(speed) {
 837                 case XFER_UDMA_7:   drive->id->dma_ultra |= 0x8080; break;
 838                 case XFER_UDMA_6:   drive->id->dma_ultra |= 0x4040; break;
 839                 case XFER_UDMA_5:   drive->id->dma_ultra |= 0x2020; break;
 840                 case XFER_UDMA_4:   drive->id->dma_ultra |= 0x1010; break;
 841                 case XFER_UDMA_3:   drive->id->dma_ultra |= 0x0808; break;
 842                 case XFER_UDMA_2:   drive->id->dma_ultra |= 0x0404; break;
 843                 case XFER_UDMA_1:   drive->id->dma_ultra |= 0x0202; break;
 844                 case XFER_UDMA_0:   drive->id->dma_ultra |= 0x0101; break;
 845                 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
 846                 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
 847                 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
 848                 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
 849                 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
 850                 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
 851                 default: break;
 852         }
 853         if (!drive->init_speed)
 854                 drive->init_speed = speed;
 855         drive->current_speed = speed;
 856         return error;
 857 }
 858
 859 /*
 860  * This should get invoked any time we exit the driver to
 861  * wait for an interrupt response from a drive.  handler() points
 862  * at the appropriate code to handle the next interrupt, and a
 863  * timer is started to prevent us from waiting forever in case
 864  * something goes wrong (see the ide_timer_expiry() handler later on).
 865  *
 866  * See also ide_execute_command
 867  */
 868 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
 869                       unsigned int timeout, ide_expiry_t *expiry)
 870 {
 871         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 872
 873         BUG_ON(hwgroup->handler);
 874         hwgroup->handler        = handler;
 875         hwgroup->expiry         = expiry;
 876         hwgroup->timer.expires  = jiffies + timeout;
 877         hwgroup->req_gen_timer  = hwgroup->req_gen;
 878         add_timer(&hwgroup->timer);
 879 }
 880
 881 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
 882                       unsigned int timeout, ide_expiry_t *expiry)
 883 {
 884         unsigned long flags;
 885         spin_lock_irqsave(&ide_lock, flags);
 886         __ide_set_handler(drive, handler, timeout, expiry);
 887         spin_unlock_irqrestore(&ide_lock, flags);
 888 }
 889
 890 EXPORT_SYMBOL(ide_set_handler);
 891
 892 /**
 893  *      ide_execute_command     -       execute an IDE command
 894  *      @drive: IDE drive to issue the command against
 895  *      @command: command byte to write
 896  *      @handler: handler for next phase
 897  *      @timeout: timeout for command
 898  *      @expiry:  handler to run on timeout
 899  *
 900  *      Helper function to issue an IDE command. This handles the
 901  *      atomicity requirements, command timing and ensures that the
 902  *      handler and IRQ setup do not race. All IDE command kick off
 903  *      should go via this function or do equivalent locking.
 904  */
 905
 906 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
 907                          unsigned timeout, ide_expiry_t *expiry)
 908 {
 909         unsigned long flags;
 910         ide_hwif_t *hwif = HWIF(drive);
 911
 912         spin_lock_irqsave(&ide_lock, flags);
 913         __ide_set_handler(drive, handler, timeout, expiry);
 914         hwif->OUTBSYNC(drive, cmd, hwif->io_ports.command_addr);
 915         /*
 916          * Drive takes 400nS to respond, we must avoid the IRQ being
 917          * serviced before that.
 918          *
 919          * FIXME: we could skip this delay with care on non shared devices
 920          */
 921         ndelay(400);
 922         spin_unlock_irqrestore(&ide_lock, flags);
 923 }
 924 EXPORT_SYMBOL(ide_execute_command);
 925
 926 void ide_execute_pkt_cmd(ide_drive_t *drive)
 927 {
 928         ide_hwif_t *hwif = drive->hwif;
 929         unsigned long flags;
 930
 931         spin_lock_irqsave(&ide_lock, flags);
 932         hwif->OUTBSYNC(drive, WIN_PACKETCMD, hwif->io_ports.command_addr);
 933         ndelay(400);
 934         spin_unlock_irqrestore(&ide_lock, flags);
 935 }
 936 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
 937
 938 /* needed below */
 939 static ide_startstop_t do_reset1 (ide_drive_t *, int);
 940
 941 /*
 942  * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
 943  * during an atapi drive reset operation. If the drive has not yet responded,
 944  * and we have not yet hit our maximum waiting time, then the timer is restarted
 945  * for another 50ms.
 946  */
 947 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
 948 {
 949         ide_hwgroup_t *hwgroup  = HWGROUP(drive);
 950         u8 stat;
 951
 952         SELECT_DRIVE(drive);
 953         udelay (10);
 954         stat = ide_read_status(drive);
 955
 956         if (OK_STAT(stat, 0, BUSY_STAT))
 957                 printk("%s: ATAPI reset complete\n", drive->name);
 958         else {
 959                 if (time_before(jiffies, hwgroup->poll_timeout)) {
 960                         ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
 961                         /* continue polling */
 962                         return ide_started;
 963                 }
 964                 /* end of polling */
 965                 hwgroup->polling = 0;
 966                 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
 967                                 drive->name, stat);
 968                 /* do it the old fashioned way */
 969                 return do_reset1(drive, 1);
 970         }
 971         /* done polling */
 972         hwgroup->polling = 0;
 973         hwgroup->resetting = 0;
 974         return ide_stopped;
 975 }
 976
 977 /*
 978  * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
 979  * during an ide reset operation. If the drives have not yet responded,
 980  * and we have not yet hit our maximum waiting time, then the timer is restarted
 981  * for another 50ms.
 982  */
 983 static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
 984 {
 985         ide_hwgroup_t *hwgroup  = HWGROUP(drive);
 986         ide_hwif_t *hwif        = HWIF(drive);
 987         const struct ide_port_ops *port_ops = hwif->port_ops;
 988         u8 tmp;
 989
 990         if (port_ops && port_ops->reset_poll) {
 991                 if (port_ops->reset_poll(drive)) {
 992                         printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
 993                                 hwif->name, drive->name);
 994                         return ide_stopped;
 995                 }
 996         }
 997
 998         tmp = ide_read_status(drive);
 999
1000         if (!OK_STAT(tmp, 0, BUSY_STAT)) {
1001                 if (time_before(jiffies, hwgroup->poll_timeout)) {
1002                         ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1003                         /* continue polling */
1004                         return ide_started;
1005                 }
1006                 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1007                 drive->failures++;
1008         } else  {
1009                 printk("%s: reset: ", hwif->name);
1010                 tmp = ide_read_error(drive);
1011
1012                 if (tmp == 1) {
1013                         printk("success\n");
1014                         drive->failures = 0;
1015                 } else {
1016                         drive->failures++;
1017                         printk("master: ");
1018                         switch (tmp & 0x7f) {
1019                                 case 1: printk("passed");
1020                                         break;
1021                                 case 2: printk("formatter device error");
1022                                         break;
1023                                 case 3: printk("sector buffer error");
1024                                         break;
1025                                 case 4: printk("ECC circuitry error");
1026                                         break;
1027                                 case 5: printk("controlling MPU error");
1028                                         break;
1029                                 default:printk("error (0x%02x?)", tmp);
1030                         }
1031                         if (tmp & 0x80)
1032                                 printk("; slave: failed");
1033                         printk("\n");
1034                 }
1035         }
1036         hwgroup->polling = 0;   /* done polling */
1037         hwgroup->resetting = 0; /* done reset attempt */
1038         return ide_stopped;
1039 }
1040
1041 static void ide_disk_pre_reset(ide_drive_t *drive)
1042 {
1043         int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1044
1045         drive->special.all = 0;
1046         drive->special.b.set_geometry = legacy;
1047         drive->special.b.recalibrate  = legacy;
1048         drive->mult_count = 0;
1049         if (!drive->keep_settings && !drive->using_dma)
1050                 drive->mult_req = 0;
1051         if (drive->mult_req != drive->mult_count)
1052                 drive->special.b.set_multmode = 1;
1053 }
1054
1055 static void pre_reset(ide_drive_t *drive)
1056 {
1057         const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1058
1059         if (drive->media == ide_disk)
1060                 ide_disk_pre_reset(drive);
1061         else
1062                 drive->post_reset = 1;
1063
1064         if (drive->using_dma) {
1065                 if (drive->crc_count)
1066                         ide_check_dma_crc(drive);
1067                 else
1068                         ide_dma_off(drive);
1069         }
1070
1071         if (!drive->keep_settings) {
1072                 if (!drive->using_dma) {
1073                         drive->unmask = 0;
1074                         drive->io_32bit = 0;
1075                 }
1076                 return;
1077         }
1078
1079         if (port_ops && port_ops->pre_reset)
1080                 port_ops->pre_reset(drive);
1081
1082         if (drive->current_speed != 0xff)
1083                 drive->desired_speed = drive->current_speed;
1084         drive->current_speed = 0xff;
1085 }
1086
1087 /*
1088  * do_reset1() attempts to recover a confused drive by resetting it.
1089  * Unfortunately, resetting a disk drive actually resets all devices on
1090  * the same interface, so it can really be thought of as resetting the
1091  * interface rather than resetting the drive.
1092  *
1093  * ATAPI devices have their own reset mechanism which allows them to be
1094  * individually reset without clobbering other devices on the same interface.
1095  *
1096  * Unfortunately, the IDE interface does not generate an interrupt to let
1097  * us know when the reset operation has finished, so we must poll for this.
1098  * Equally poor, though, is the fact that this may a very long time to complete,
1099  * (up to 30 seconds worstcase).  So, instead of busy-waiting here for it,
1100  * we set a timer to poll at 50ms intervals.
1101  */
1102 static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1103 {
1104         unsigned int unit;
1105         unsigned long flags;
1106         ide_hwif_t *hwif;
1107         ide_hwgroup_t *hwgroup;
1108         struct ide_io_ports *io_ports;
1109         const struct ide_port_ops *port_ops;
1110         u8 ctl;
1111
1112         spin_lock_irqsave(&ide_lock, flags);
1113         hwif = HWIF(drive);
1114         hwgroup = HWGROUP(drive);
1115
1116         io_ports = &hwif->io_ports;
1117
1118         /* We must not reset with running handlers */
1119         BUG_ON(hwgroup->handler != NULL);
1120
1121         /* For an ATAPI device, first try an ATAPI SRST. */
1122         if (drive->media != ide_disk && !do_not_try_atapi) {
1123                 hwgroup->resetting = 1;
1124                 pre_reset(drive);
1125                 SELECT_DRIVE(drive);
1126                 udelay (20);
1127                 hwif->OUTBSYNC(drive, WIN_SRST, io_ports->command_addr);
1128                 ndelay(400);
1129                 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1130                 hwgroup->polling = 1;
1131                 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1132                 spin_unlock_irqrestore(&ide_lock, flags);
1133                 return ide_started;
1134         }
1135
1136         /*
1137          * First, reset any device state data we were maintaining
1138          * for any of the drives on this interface.
1139          */
1140         for (unit = 0; unit < MAX_DRIVES; ++unit)
1141                 pre_reset(&hwif->drives[unit]);
1142
1143         if (io_ports->ctl_addr == 0) {
1144                 spin_unlock_irqrestore(&ide_lock, flags);
1145                 return ide_stopped;
1146         }
1147
1148         hwgroup->resetting = 1;
1149         /*
1150          * Note that we also set nIEN while resetting the device,
1151          * to mask unwanted interrupts from the interface during the reset.
1152          * However, due to the design of PC hardware, this will cause an
1153          * immediate interrupt due to the edge transition it produces.
1154          * This single interrupt gives us a "fast poll" for drives that
1155          * recover from reset very quickly, saving us the first 50ms wait time.
1156          */
1157         /* set SRST and nIEN */
1158         hwif->OUTBSYNC(drive, drive->ctl|6, io_ports->ctl_addr);
1159         /* more than enough time */
1160         udelay(10);
1161         if (drive->quirk_list == 2)
1162                 ctl = drive->ctl;       /* clear SRST and nIEN */
1163         else
1164                 ctl = drive->ctl | 2;   /* clear SRST, leave nIEN */
1165         hwif->OUTBSYNC(drive, ctl, io_ports->ctl_addr);
1166         /* more than enough time */
1167         udelay(10);
1168         hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1169         hwgroup->polling = 1;
1170         __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1171
1172         /*
1173          * Some weird controller like resetting themselves to a strange
1174          * state when the disks are reset this way. At least, the Winbond
1175          * 553 documentation says that
1176          */
1177         port_ops = hwif->port_ops;
1178         if (port_ops && port_ops->resetproc)
1179                 port_ops->resetproc(drive);
1180
1181         spin_unlock_irqrestore(&ide_lock, flags);
1182         return ide_started;
1183 }
1184
1185 /*
1186  * ide_do_reset() is the entry point to the drive/interface reset code.
1187  */
1188
1189 ide_startstop_t ide_do_reset (ide_drive_t *drive)
1190 {
1191         return do_reset1(drive, 0);
1192 }
1193
1194 EXPORT_SYMBOL(ide_do_reset);
1195
1196 /*
1197  * ide_wait_not_busy() waits for the currently selected device on the hwif
1198  * to report a non-busy status, see comments in ide_probe_port().
1199  */
1200 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1201 {
1202         u8 stat = 0;
1203
1204         while(timeout--) {
1205                 /*
1206                  * Turn this into a schedule() sleep once I'm sure
1207                  * about locking issues (2.5 work ?).
1208                  */
1209                 mdelay(1);
1210                 stat = hwif->INB(hwif->io_ports.status_addr);
1211                 if ((stat & BUSY_STAT) == 0)
1212                         return 0;
1213                 /*
1214                  * Assume a value of 0xff means nothing is connected to
1215                  * the interface and it doesn't implement the pull-down
1216                  * resistor on D7.
1217                  */
1218                 if (stat == 0xff)
1219                         return -ENODEV;
1220                 touch_softlockup_watchdog();
1221                 touch_nmi_watchdog();
1222         }
1223         return -EBUSY;
1224 }
1225
1226 EXPORT_SYMBOL_GPL(ide_wait_not_busy);
1227