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

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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: [email protected]
---------
--- 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 <[email protected]>

--
tejun
-
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