1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/mach-iop32x/irq.c b/arch/arm/mach-iop32x/irq.c
new file mode 100644
index 00000000000..69d6302f40c
--- /dev/null
+++ b/arch/arm/mach-iop32x/irq.c
@@ -0,0 +1,76 @@
+/*
+ * arch/arm/mach-iop32x/irq.c
+ *
+ * Generic IOP32X IRQ handling functionality
+ *
+ * Author: Rory Bolt <rorybolt@pacbell.net>
+ * Copyright (C) 2002 Rory Bolt
+ *
+ * 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/init.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <asm/mach/irq.h>
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+
+static u32 iop32x_mask;
+
+static inline void intctl_write(u32 val)
+{
+	iop3xx_cp6_enable();
+	asm volatile("mcr p6, 0, %0, c0, c0, 0" : : "r" (val));
+	iop3xx_cp6_disable();
+}
+
+static inline void intstr_write(u32 val)
+{
+	iop3xx_cp6_enable();
+	asm volatile("mcr p6, 0, %0, c4, c0, 0" : : "r" (val));
+	iop3xx_cp6_disable();
+}
+
+static void
+iop32x_irq_mask(unsigned int irq)
+{
+	iop32x_mask &= ~(1 << irq);
+	intctl_write(iop32x_mask);
+}
+
+static void
+iop32x_irq_unmask(unsigned int irq)
+{
+	iop32x_mask |= 1 << irq;
+	intctl_write(iop32x_mask);
+}
+
+struct irq_chip ext_chip = {
+	.name	= "IOP32x",
+	.ack	= iop32x_irq_mask,
+	.mask	= iop32x_irq_mask,
+	.unmask	= iop32x_irq_unmask,
+};
+
+void __init iop32x_init_irq(void)
+{
+	int i;
+
+	intctl_write(0);
+	intstr_write(0);
+	if (machine_is_glantank() ||
+	    machine_is_iq80321() ||
+	    machine_is_iq31244() ||
+	    machine_is_n2100())
+		*IOP3XX_PCIIRSR = 0x0f;
+
+	for (i = 0; i < NR_IRQS; i++) {
+		set_irq_chip(i, &ext_chip);
+		set_irq_handler(i, do_level_IRQ);
+		set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+	}
+}