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it8213/piix/slc90e66: "de-couple" PIO and UDMA modes 

Don't force PIO4 when programming UDMA mode (suggested by Sergei).

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 3135469e1f
commit 1c54a93d4d
3 changed files with 13 additions and 17 deletions
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9
drivers/ide/pci/it8213.c
View File

@ -93,7 +93,7 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
int w_flag = 0x10 << drive->dn;
int u_speed = 0;
u16 reg4042, reg4a;
u8 reg48, reg54, reg55, pio;
u8 reg48, reg54, reg55;
pci_read_config_word(dev, maslave, &reg4042);
pci_read_config_byte(dev, 0x48, &reg48);
@ -134,10 +134,9 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
pci_write_config_byte(dev, 0x54, reg54 | v_flag);
} else
pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
pio = 4;
} else {
const u8 mwdma_to_pio[] = { 0, 3, 4 };
u8 pio;
if (reg48 & u_flag)
pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
@ -152,9 +151,9 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
else
pio = 2; /* only SWDMA2 is allowed */
}
it8213_set_pio_mode(drive, pio);
it8213_set_pio_mode(drive, pio);
}
}
/**

11
drivers/ide/pci/piix.c
View File

@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/piix.c Version 0.52 Jul 14, 2007
* linux/drivers/ide/pci/piix.c Version 0.53 Aug 9, 2007
*
* Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
@ -194,7 +194,7 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed)
int u_speed = 0;
int sitre;
u16 reg4042, reg4a;
u8 reg48, reg54, reg55, pio;
u8 reg48, reg54, reg55;
pci_read_config_word(dev, maslave, &reg4042);
sitre = (reg4042 & 0x4000) ? 1 : 0;
@ -231,10 +231,9 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed)
pci_write_config_byte(dev, 0x54, reg54 | v_flag);
} else
pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
pio = 4;
} else {
const u8 mwdma_to_pio[] = { 0, 3, 4 };
u8 pio;
if (reg48 & u_flag)
pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
@ -249,9 +248,9 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed)
pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
else
pio = 2; /* only SWDMA2 is allowed */
}
piix_set_pio_mode(drive, pio);
piix_set_pio_mode(drive, pio);
}
}
/**

10
drivers/ide/pci/slc90e66.c
View File

@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/slc90e66.c Version 0.17 Aug 2, 2007
* linux/drivers/ide/pci/slc90e66.c Version 0.18 Aug 9, 2007
*
* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
* Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
@ -82,7 +82,6 @@ static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
int sitre = 0, a_speed = 7 << (drive->dn * 4);
int u_speed = 0, u_flag = 1 << drive->dn;
u16 reg4042, reg44, reg48, reg4a;
u8 pio;
pci_read_config_word(dev, maslave, &reg4042);
sitre = (reg4042 & 0x4000) ? 1 : 0;
@ -111,10 +110,9 @@ static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
pci_read_config_word(dev, 0x4a, &reg4a);
pci_write_config_word(dev, 0x4a, reg4a|u_speed);
}
pio = 4;
} else {
const u8 mwdma_to_pio[] = { 0, 3, 4 };
u8 pio;
if (reg48 & u_flag)
pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
@ -125,9 +123,9 @@ static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
else
pio = 2; /* only SWDMA2 is allowed */
}
slc90e66_set_pio_mode(drive, pio);
slc90e66_set_pio_mode(drive, pio);
}
}
static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)