1 files changed, 53 insertions, 0 deletions

diff --git a/arch/mips/pci/fixup-rbtx4938.c b/arch/mips/pci/fixup-rbtx4938.c
new file mode 100644
index 000000000000..a80579af609b
--- /dev/null
+++ b/arch/mips/pci/fixup-rbtx4938.c
@@ -0,0 +1,53 @@
+/*
+ * Toshiba rbtx4938 pci routines
+ * Copyright (C) 2000-2001 Toshiba Corporation
+ *
+ * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
+ */
+#include <linux/types.h>
+#include <asm/txx9/pci.h>
+#include <asm/txx9/rbtx4938.h>
+
+int __init rbtx4938_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+        int irq = tx4938_pcic1_map_irq(dev, slot);
+
+        if (irq >= 0)
+                return irq;
+        irq = pin;
+        /* IRQ rotation */
+        irq--;  /* 0-3 */
+        if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
+                /* PCI CardSlot (IDSEL=A23) */
+                /* PCIA => PCIA (IDSEL=A23) */
+                irq = (irq + 0 + slot) % 4;
+        } else {
+                /* PCI Backplane */
+                if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
+                        irq = (irq + 33 - slot) % 4;
+                else
+                        irq = (irq + 3 + slot) % 4;
+        }
+        irq++;  /* 1-4 */
+
+        switch (irq) {
+        case 1:
+                irq = RBTX4938_IRQ_IOC_PCIA;
+                break;
+        case 2:
+                irq = RBTX4938_IRQ_IOC_PCIB;
+                break;
+        case 3:
+                irq = RBTX4938_IRQ_IOC_PCIC;
+                break;
+        case 4:
+                irq = RBTX4938_IRQ_IOC_PCID;
+                break;
+        }
+        return irq;
+}