1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm/mach-lh7a40x/irq-lh7a400.c b/arch/arm/mach-lh7a40x/irq-lh7a400.c
new file mode 100644
index 00000000000..f334d81c2cd
--- /dev/null
+++ b/arch/arm/mach-lh7a40x/irq-lh7a400.c
@@ -0,0 +1,90 @@
+/* arch/arm/mach-lh7a40x/irq-lh7a400.c
+ *
+ *  Copyright (C) 2004 Coastal Environmental Systems
+ *
+ *  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/module.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/arch/irq.h>
+#include <asm/arch/irqs.h>
+
+
+  /* CPU IRQ handling */
+
+static void lh7a400_mask_irq (u32 irq)
+{
+	INTC_INTENC = (1 << irq);
+}
+
+static void lh7a400_unmask_irq (u32 irq)
+{
+	INTC_INTENS = (1 << irq);
+}
+
+static void lh7a400_ack_gpio_irq (u32 irq)
+{
+	GPIO_GPIOFEOI = (1 << IRQ_TO_GPIO (irq));
+	INTC_INTENC = (1 << irq);
+}
+
+static struct irqchip lh7a400_internal_chip = {
+	.ack	= lh7a400_mask_irq, /* Level triggering -> mask is ack */
+	.mask	= lh7a400_mask_irq,
+	.unmask	= lh7a400_unmask_irq,
+};
+
+static struct irqchip lh7a400_gpio_chip = {
+	.ack	= lh7a400_ack_gpio_irq,
+	.mask	= lh7a400_mask_irq,
+	.unmask	= lh7a400_unmask_irq,
+};
+
+
+  /* IRQ initialization */
+
+void __init lh7a400_init_irq (void)
+{
+	int irq;
+
+	INTC_INTENC = 0xffffffff;	/* Disable all interrupts */
+	GPIO_GPIOFINTEN = 0x00;		/* Disable all GPIOF interrupts */
+	barrier ();
+
+	for (irq = 0; irq < NR_IRQS; ++irq) {
+		switch (irq) {
+		case IRQ_GPIO0INTR:
+		case IRQ_GPIO1INTR:
+		case IRQ_GPIO2INTR:
+		case IRQ_GPIO3INTR:
+		case IRQ_GPIO4INTR:
+		case IRQ_GPIO5INTR:
+		case IRQ_GPIO6INTR:
+		case IRQ_GPIO7INTR:
+			set_irq_chip (irq, &lh7a400_gpio_chip);
+			set_irq_handler (irq, do_level_IRQ); /* OK default */
+			break;
+		default:
+			set_irq_chip (irq, &lh7a400_internal_chip);
+			set_irq_handler (irq, do_level_IRQ);
+		}
+		set_irq_flags (irq, IRQF_VALID);
+	}
+
+	lh7a40x_init_board_irq ();
+
+/* *** FIXME: the LH7a400 does use FIQ interrupts in some cases.  For
+   the time being, these are not initialized. */
+
+/*	init_FIQ(); */
+}