1 files changed, 77 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/nslu2-pci.c b/arch/arm/mach-ixp4xx/nslu2-pci.c
new file mode 100644
index 000000000000..a575f2e0b2c8
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/nslu2-pci.c
@@ -0,0 +1,77 @@
+/*
+ * arch/arm/mach-ixp4xx/nslu2-pci.c
+ *
+ * NSLU2 board-level PCI initialization
+ *
+ * based on ixdp425-pci.c:
+ *      Copyright (C) 2002 Intel Corporation.
+ *      Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * Maintainer: http://www.nslu2-linux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+void __init nslu2_pci_preinit(void)
+{
+        set_irq_type(IRQ_NSLU2_PCI_INTA, IRQT_LOW);
+        set_irq_type(IRQ_NSLU2_PCI_INTB, IRQT_LOW);
+        set_irq_type(IRQ_NSLU2_PCI_INTC, IRQT_LOW);
+
+        gpio_line_isr_clear(NSLU2_PCI_INTA_PIN);
+        gpio_line_isr_clear(NSLU2_PCI_INTB_PIN);
+        gpio_line_isr_clear(NSLU2_PCI_INTC_PIN);
+
+        /* INTD is not configured as GPIO is used
+         * for the power input button.
+         */
+
+        ixp4xx_pci_preinit();
+}
+
+static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+        static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = {
+                IRQ_NSLU2_PCI_INTA,
+                IRQ_NSLU2_PCI_INTB,
+                IRQ_NSLU2_PCI_INTC,
+        };
+
+        int irq = -1;
+
+        if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV &&
+                pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) {
+                        irq = pci_irq_table[(slot + pin - 2) % NSLU2_PCI_IRQ_LINES];
+        }
+
+        return irq;
+}
+
+struct hw_pci __initdata nslu2_pci = {
+        .nr_controllers = 1,
+        .preinit        = nslu2_pci_preinit,
+        .swizzle        = pci_std_swizzle,
+        .setup          = ixp4xx_setup,
+        .scan           = ixp4xx_scan_bus,
+        .map_irq        = nslu2_map_irq,
+};
+
+int __init nslu2_pci_init(void) /* monkey see, monkey do */
+{
+        if (machine_is_nslu2())
+                pci_common_init(&nslu2_pci);
+
+        return 0;
+}
+
+subsys_initcall(nslu2_pci_init);