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Diffstat (limited to 'arch/arm/mach-lh7a40x/irq-lh7a400.c')
-rw-r--r--arch/arm/mach-lh7a40x/irq-lh7a400.c90
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 000000000000..f334d81c2cd8
--- /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(); */
+}