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-rw-r--r--arch/i386/pci/irq.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index da21b1d07c15..83458f81e661 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -227,6 +227,24 @@ static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, i
}
/*
+ * The VIA pirq rules are nibble-based, like ALI,
+ * but without the ugly irq number munging.
+ * However, for 82C586, nibble map is different .
+ */
+static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+{
+ static unsigned int pirqmap[4] = { 3, 2, 5, 1 };
+ return read_config_nybble(router, 0x55, pirqmap[pirq-1]);
+}
+
+static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+{
+ static unsigned int pirqmap[4] = { 3, 2, 5, 1 };
+ write_config_nybble(router, 0x55, pirqmap[pirq-1], irq);
+ return 1;
+}
+
+/*
* ITE 8330G pirq rules are nibble-based
* FIXME: pirqmap may be { 1, 0, 3, 2 },
* 2+3 are both mapped to irq 9 on my system
@@ -512,6 +530,10 @@ static __init int via_router_probe(struct irq_router *r, struct pci_dev *router,
switch(device)
{
case PCI_DEVICE_ID_VIA_82C586_0:
+ r->name = "VIA";
+ r->get = pirq_via586_get;
+ r->set = pirq_via586_set;
+ return 1;
case PCI_DEVICE_ID_VIA_82C596:
case PCI_DEVICE_ID_VIA_82C686:
case PCI_DEVICE_ID_VIA_8231: