linux-kernel - [PATCH] PCI subsystem: AMD SATA IDE mode quirk

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Date:	Sat, 2 Feb 2008 13:56:56 +0800
From:	"Cai, Crane" <Crane.Cai@....com>
To:	gregkh@...e.de
cc:	linux-kernel@...r.kernel.org, linux-pci@...ey.karlin.mff.cuni.cz
Subject: [PATCH] PCI subsystem: AMD SATA IDE mode quirk

From: Crane Cai <crane.cai@....com>

PCI: modify SATA IDE mode quirk
When initialize and resume, SB600/700/800 need to set SATA mode
correctly.

Signed-off-by: Crane Cai <crane.cai@....com>
--------------------------------------------
--- a/drivers/pci/quirks.c	2007-09-24 14:16:32.000000000 -0400
+++ b/drivers/pci/quirks.c	2008-02-02 11:23:47.000000000 -0500
@@ -859,12 +859,13 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82454NX,	quirk_disable_pxb );
 
 
-static void __devinit quirk_sb600_sata(struct pci_dev *pdev)
+static void __devinit quirk_amd_ide_mode(struct pci_dev *pdev)
 {
-	/* set sb600 sata to ahci mode */
-	if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
-		u8 tmp;
+	/* set sb600/sb700/sb800 sata to ahci mode */
+	u8 tmp;
 
+	pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &tmp);
+	if (tmp == 0x01) {
 		pci_read_config_byte(pdev, 0x40, &tmp);
 		pci_write_config_byte(pdev, 0x40, tmp|1);
 		pci_write_config_byte(pdev, 0x9, 1);
@@ -872,10 +873,13 @@ static void __devinit quirk_sb600_sata(s
 		pci_write_config_byte(pdev, 0x40, tmp);
 
 		pdev->class = PCI_CLASS_STORAGE_SATA_AHCI;
+		printk(KERN_INFO "PCI: set SATA to AHCI mode\n");
 	}
 }
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_sb600_sata);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_sb600_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_amd_ide_mode);
+DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_amd_ide_mode);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_amd_ide_mode);
+DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_amd_ide_mode);
 
 /*
  *	Serverworks CSB5 IDE does not fully support native mode


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