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sis5513: clear prefetch and postwrite for ATAPI devices 

Clear prefetch and postwrite for ATAPI devices instead of depending on BIOS.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-16 22:29:56 +02:00
parent 1c54a93d4d
commit d83fca58d3
1 changed files with 6 additions and 7 deletions
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13
drivers/ide/pci/sis5513.c
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@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/sis5513.c Version 0.29 Aug 1, 2007
* linux/drivers/ide/pci/sis5513.c Version 0.30 Aug 9, 2007
*
* Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
* Copyright (C) 2002 Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer
@ -522,20 +522,19 @@ static void sis_program_timings(ide_drive_t *drive, const u8 mode)
sis_ata133_program_timings(drive, mode);
}
/* Enables per-drive prefetch and postwrite */
static void config_drive_art_rwp (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u8 reg4bh = 0;
u8 rw_prefetch = (0x11 << drive->dn);
u8 rw_prefetch = 0;
if (drive->media != ide_disk)
return;
pci_read_config_byte(dev, 0x4b, &reg4bh);
if ((reg4bh & rw_prefetch) != rw_prefetch)
if (drive->media == ide_disk)
rw_prefetch = 0x11 << drive->dn;
if ((reg4bh & (0x11 << drive->dn)) != rw_prefetch)
pci_write_config_byte(dev, 0x4b, reg4bh|rw_prefetch);
}