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SubjectRe: [PATCH] Add IDE mode support for SB600 SATA
Conke Hu wrote:
> ATI SB600 SATA controller supports 4 modes: Legacy IDE, Native IDE, AHCI and RAID. Legacy/Native IDE mode is designed for compatibility with some old OS without AHCI driver but looses SATAII/AHCI features such as NCQ. This patch will make SB600 SATA run in AHCI mode even if it was set as IDE mode by system BIOS.
>
> Signed-off-by: conke.hu@amd.com
> ---------
> --- linux-2.6.19-rc6-git4/drivers/pci/quirks.c.orig 2006-11-23 19:45:49.000000000 +0800
> +++ linux-2.6.19-rc6-git4/drivers/pci/quirks.c 2006-11-23 19:34:23.000000000 +0800
> @@ -795,6 +795,25 @@ static void __init quirk_mediagx_master(
> }
> }
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master );
> +
> +#if defined(CONFIG_SATA_AHCI) || defined(CONFIG_SATA_AHCI_MODULE)
> +static void __devinit quirk_sb600_sata(struct pci_dev *pdev)
> +{
> + /* set sb600 sata to ahci mode */
> + if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
> + u8 tmp;
> +
> + pci_read_config_byte(pdev, 0x40, &tmp);
> + pci_write_config_byte(pdev, 0x40, tmp|1);
> + pci_write_config_byte(pdev, 0x9, 1);
> + pci_write_config_byte(pdev, 0xa, 6);
> + pci_write_config_byte(pdev, 0x40, tmp);
> +

Two trailing tabs in the above line. Please remove those.

> + pdev->class = 0x010601;
> + }
> +}
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_sb600_sata);
> +#endif
>
> /*
> * As per PCI spec, ignore base address registers 0-3 of the IDE controllers

Other than that, Acked-by: Tejun Heo <htejun@gmail.com>

--
tejun
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