1 files changed, 89 insertions, 0 deletions

diff --git a/arch/mips/pci/fixup-sni.c b/arch/mips/pci/fixup-sni.c
new file mode 100644
index 000000000000..c8ef01a017cc
--- /dev/null
+++ b/arch/mips/pci/fixup-sni.c
@@ -0,0 +1,89 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * SNI specific PCI support for RM200/RM300.
+ *
+ * Copyright (C) 1997 - 2000, 2003, 04 Ralf Baechle (ralf@linux-mips.org)
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <asm/mipsregs.h>
+#include <asm/sni.h>
+
+/*
+ * Shortcuts ...
+ */
+#define SCSI    PCIMT_IRQ_SCSI
+#define ETH     PCIMT_IRQ_ETHERNET
+#define INTA    PCIMT_IRQ_INTA
+#define INTB    PCIMT_IRQ_INTB
+#define INTC    PCIMT_IRQ_INTC
+#define INTD    PCIMT_IRQ_INTD
+
+/*
+ * Device 0: PCI EISA Bridge    (directly routed)
+ * Device 1: NCR53c810 SCSI     (directly routed)
+ * Device 2: PCnet32 Ethernet   (directly routed)
+ * Device 3: VGA                (routed to INTB)
+ * Device 4: Unused
+ * Device 5: Slot 2
+ * Device 6: Slot 3
+ * Device 7: Slot 4     
+ *
+ * Documentation says the VGA is device 5 and device 3 is unused but that
+ * seem to be a documentation error.  At least on my RM200C the Cirrus
+ * Logic CL-GD5434 VGA is device 3.
+ */
+static char irq_tab_rm200[8][5] __initdata = {
+        /*       INTA  INTB  INTC  INTD */
+        {     0,    0,    0,    0,    0 },      /* EISA bridge */
+        {  SCSI, SCSI, SCSI, SCSI, SCSI },      /* SCSI */
+        {   ETH,  ETH,  ETH,  ETH,  ETH },      /* Ethernet */
+        {  INTB, INTB, INTB, INTB, INTB },      /* VGA */
+        {     0,    0,    0,    0,    0 },      /* Unused */
+        {     0, INTB, INTC, INTD, INTA },      /* Slot 2 */
+        {     0, INTC, INTD, INTA, INTB },      /* Slot 3 */
+        {     0, INTD, INTA, INTB, INTC },      /* Slot 4 */
+};
+
+/*
+ * In Revision D of the RM300 Device 2 has become a normal purpose Slot 1
+ *
+ * The VGA card is optional for RM300 systems.
+ */
+static char irq_tab_rm300d[8][5] __initdata = {
+        /*       INTA  INTB  INTC  INTD */
+        {     0,    0,    0,    0,    0 },      /* EISA bridge */
+        {  SCSI, SCSI, SCSI, SCSI, SCSI },      /* SCSI */
+        {     0, INTC, INTD, INTA, INTB },      /* Slot 1 */
+        {  INTB, INTB, INTB, INTB, INTB },      /* VGA */
+        {     0,    0,    0,    0,    0 },      /* Unused */
+        {     0, INTB, INTC, INTD, INTA },      /* Slot 2 */
+        {     0, INTC, INTD, INTA, INTB },      /* Slot 3 */
+        {     0, INTD, INTA, INTB, INTC },      /* Slot 4 */
+};
+
+static inline int is_rm300_revd(void)
+{
+        unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR;
+
+        return (csmsr & 0xa0) == 0x20;
+}
+
+int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+        if (is_rm300_revd())
+                return irq_tab_rm300d[slot][pin];
+
+        return irq_tab_rm200[slot][pin];
+}
+
+/* Do platform specific device initialization at pci_enable_device() time */
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+        return 0;
+}