[PATCH] PCI: quirk for asus a8v and a8v delux motherboards
On ASUS A8V and A8V Deluxe boards, the onboard AC97 audio controller
and MC97 modem controller are deactivated when a second PCI soundcard
is present. This patch enables them.
Signed-off-by: Bauke Jan Douma <bjdouma@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index af4bc8e..d71c31d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1074,6 +1074,37 @@
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_735, quirk_sis_96x_compatible );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503 );
+/*
+ * On ASUS A8V and A8V Deluxe boards, the onboard AC97 audio controller
+ * and MC97 modem controller are disabled when a second PCI soundcard is
+ * present. This patch, tweaking the VT8237 ISA bridge, enables them.
+ * -- bjd
+ */
+static void __init asus_hides_ac97_lpc(struct pci_dev *dev)
+{
+ u8 val;
+ int asus_hides_ac97 = 0;
+
+ if (likely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
+ if (dev->device == PCI_DEVICE_ID_VIA_8237)
+ asus_hides_ac97 = 1;
+ }
+
+ if (!asus_hides_ac97)
+ return;
+
+ pci_read_config_byte(dev, 0x50, &val);
+ if (val & 0xc0) {
+ pci_write_config_byte(dev, 0x50, val & (~0xc0));
+ pci_read_config_byte(dev, 0x50, &val);
+ if (val & 0xc0)
+ printk(KERN_INFO "PCI: onboard AC97/MC97 devices continue to play 'hide and seek'! 0x%x\n", val);
+ else
+ printk(KERN_INFO "PCI: enabled onboard AC97/MC97 devices\n");
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, asus_hides_ac97_lpc );
+
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus );
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus );
