[PATCH] Support for ITE interrupt router

Support for an extra interrupt router.

arch/i386/kernel/pci-irq.c

@@ -207,6 +207,24 @@ static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, i
 	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
+ */
+static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+{
+	static unsigned char pirqmap[4] = { 1, 0, 2, 3 };
+	return read_config_nybble(router,0x43, pirqmap[pirq-1]);
+}
+
+static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+{
+	static unsigned char pirqmap[4] = { 1, 0, 2, 3 };
+	write_config_nybble(router, 0x43, pirqmap[pirq-1], irq);
+	return 1;
+}
+
 /*
  * OPTI: high four bits are nibble pointer..
  * I wonder what the low bits do?
@@ -449,6 +467,8 @@ static struct irq_router pirq_routers[] = {
 
 	{ "ALI", PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, pirq_ali_get, pirq_ali_set },
 
+	{ "ITE", PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_IT8330G_0, pirq_ite_get, pirq_ite_set },
+
 	{ "VIA", PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0, pirq_via_get, pirq_via_set },
 	{ "VIA", PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596, pirq_via_get, pirq_via_set },
 	{ "VIA", PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, pirq_via_get, pirq_via_set },