Hello *,
i have a small patch for a Problem that i had.
On the MSI-K8T-NEO2 FIR ( Athlon-64, Socket 939 with VIA-K8T800- Chipset
and onboard Sound,... ) the BIOS lets you choose "DISABLED" or "AUTO"
for the On-Board Sound Device.
If you add another PCI-Sound-Card the BIOS disables the on-board device.
So far I have a Quirk, that does set the correspondent BIT in the PCI-registers
to enable the soundcard.
But i have another 2 problems:
- how to enshure that the code is executed ONLY on excactly this kind of boards
(not any other with similar Chipset)?
- what to do to (hopefully) integrate that pice of code into
one of the next Kernel Releases?
Johannes Goecke
diff -u -r linux-2.6.15.6/drivers/pci/quirks.c linux-2.6.15.6-jg/drivers/pci/quirks.c
--- linux-2.6.15.6/drivers/pci/quirks.c 2006-03-05 20:07:54.000000000 +0100
+++ linux-2.6.15.6-jg/drivers/pci/quirks.c 2006-03-09 13:05:06.000000000 +0100
@@ -861,6 +861,41 @@
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82375, quirk_eisa_bridge );
+/*
+ * On the MSI-K8T-Neo2Fir Board, the internal Soundcard is disabled
+ * when a PCI-Soundcard is added. The BIOS only gives Options
+ * "Disabled" and "AUTO". This Quirk Sets the corresponding
+ * Register-Value to enable the Soundcard.
+ */
+static void __init k8t_sound_hostbridge(struct pci_dev *dev)
+{
+ printk(KERN_INFO "PCI: Quirk-MSI-K8T Soundcard On\n");
+
+ unsigned char val;
+
+ pci_read_config_byte(dev, 0x50, &val);
+
+ if ((val == 0x88) || (val == 0xc8)) {
+ pci_write_config_byte(dev, 0x50, val & (~0x40));
+
+ /* Verify the Change for Status output */
+ pci_read_config_byte(dev, 0x50, &val);
+ if (val & 0x40)
+ printk(KERN_INFO "PCI: MSI-K8T soundcard still off\n");
+ else
+ printk(KERN_INFO "PCI: MSI-K8T soundcard on\n");
+ } else {
+ printk(KERN_INFO "PCI: Unexpected Value in PCI-Register : no Change!\n");
+ }
+
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, k8t_sound_hostbridge );
+
+
/*
* On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
* is not activated. The myth is that Asus said that they do not want the
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