linux-kernel - Re: [PATCH] Add IDE mode support for SB600 SATA

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Date:	Fri, 24 Nov 2006 15:01:51 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Conke Hu <conke.hu@....com>
CC:	linux-kernel@...r.kernel.org, alan@...rguk.ukuu.org.uk,
	Andrew Morton <akpm@...l.org>, Jeff Garzik <jeff@...zik.org>
Subject: Re: [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@....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@...il.com>

-- 
tejun
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