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cmd640: add __set_prefetch_mode() 

Factor out the common code from check_prefetch()
and set_prefetch_mode() to __set_prefetch_mode().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-10-10 22:39:28 +02:00
parent 151a670186
commit af5dfe8cf0
1 changed files with 20 additions and 22 deletions
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42
drivers/ide/pci/cmd640.c
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@ -374,6 +374,21 @@ static void cmd640_dump_regs(void)
}
#endif
static void __set_prefetch_mode(ide_drive_t *drive, int mode)
{
if (mode) { /* want prefetch on? */
#if CMD640_PREFETCH_MASKS
drive->no_unmask = 1;
drive->unmask = 0;
#endif
drive->no_io_32bit = 0;
} else {
drive->no_unmask = 0;
drive->no_io_32bit = 1;
drive->io_32bit = 0;
}
}
#ifndef CONFIG_BLK_DEV_CMD640_ENHANCED
/*
* Check whether prefetch is on for a drive,
@ -383,19 +398,10 @@ static void __init check_prefetch(ide_drive_t *drive, unsigned int index)
{
u8 b = get_cmd640_reg(prefetch_regs[index]);
if (b & prefetch_masks[index]) { /* is prefetch off? */
drive->no_unmask = 0;
drive->no_io_32bit = 1;
drive->io_32bit = 0;
} else {
#if CMD640_PREFETCH_MASKS
drive->no_unmask = 1;
drive->unmask = 0;
#endif
drive->no_io_32bit = 0;
}
__set_prefetch_mode(drive, (b & prefetch_masks[index]) ? 0 : 1);
}
#else
/*
* Sets prefetch mode for a drive.
*/
@ -407,19 +413,11 @@ static void set_prefetch_mode(ide_drive_t *drive, unsigned int index, int mode)
spin_lock_irqsave(&cmd640_lock, flags);
b = __get_cmd640_reg(reg);
if (mode) { /* want prefetch on? */
#if CMD640_PREFETCH_MASKS
drive->no_unmask = 1;
drive->unmask = 0;
#endif
drive->no_io_32bit = 0;
__set_prefetch_mode(drive, mode);
if (mode)
b &= ~prefetch_masks[index]; /* enable prefetch */
} else {
drive->no_unmask = 0;
drive->no_io_32bit = 1;
drive->io_32bit = 0;
else
b |= prefetch_masks[index]; /* disable prefetch */
}
__put_cmd640_reg(reg, b);
spin_unlock_irqrestore(&cmd640_lock, flags);
}