[PATCH] Add quirk to set AHCI mode on ICH boards

[Riki Oktarianto <rkoktarianto@gmail.com>]

Some BIOSen map AHCI ABAR but lock the SATA controller to IDE mode.
This patch add quirk to set AHCI mode on ICH board with such case.

Tested on Macbook2,1 (ICH7M)

-- 
Riki Oktarianto

--- linux-2.6.24-rc2.orig/drivers/pci/quirks.c
+++ linux-2.6.24-rc2/drivers/pci/quirks.c
@@ -466,6 +466,38 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_I
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_2, quirk_ich6_lpc_acpi );
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_3, quirk_ich6_lpc_acpi );
 
+static void __devinit quirk_ich_sata(struct pci_dev *dev)
+{
+	u32 ahci_bar;
+
+	pci_read_config_dword(dev, 0x24, &ahci_bar);
+	if (!ahci_bar) {
+		return;
+	}
+
+	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
+		pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
+		pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
+	}
+	dev->class = PCI_CLASS_STORAGE_SATA_AHCI;
+	printk (KERN_INFO "PCI_CLASS_STORAGE_SATA_AHCI set for %s\n",
+		pci_name(dev));
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2652, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2653, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27c0, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27c4, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2680, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2820, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2825, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2828, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2920, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2921, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2926, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2928, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x292d, quirk_ich_sata);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x292e, quirk_ich_sata);
+
 /*
  * VIA ACPI: One IO region pointed to by longword at
  *	0x48 or 0x20 (256 bytes of ACPI registers)