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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-16 22:29:56 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-16 22:29:56 +0200 |
| commit | 1c54a93d4de34c87be9c63fe5094157e10995d6b (patch) | |
| tree | 9da94f64f4d432ca222547f555c9c1bb10bf2e25 /drivers/ide/pci/piix.c | |
| parent | ide: unexport noautodma (diff) | |
| download | linux-1c54a93d4de34c87be9c63fe5094157e10995d6b.tar.xz linux-1c54a93d4de34c87be9c63fe5094157e10995d6b.zip | |
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>
Diffstat (limited to 'drivers/ide/pci/piix.c')
| -rw-r--r-- | drivers/ide/pci/piix.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c index d5a31e9f5727..b0f06161eb8e 100644 --- a/drivers/ide/pci/piix.c +++ b/drivers/ide/pci/piix.c @@ -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, ®4042); 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); + } } /** |