1 files changed, 82 insertions, 0 deletions
diff --git a/arch/arm/mach-epxa10db/irq.c b/arch/arm/mach-epxa10db/irq.c
new file mode 100644
index 0000000..9bf927e
--- /dev/null
+++ b/arch/arm/mach-epxa10db/irq.c
@@ -0,0 +1,82 @@
+/*
+ *  linux/arch/arm/mach-epxa10db/irq.c
+ *
+ *  Copyright (C) 2001 Altera Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/stddef.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/arch/platform.h>
+#include <asm/arch/int_ctrl00.h>
+
+
+static void epxa_mask_irq(unsigned int irq)
+{
+        writel(1 << irq, INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+}
+
+static void epxa_unmask_irq(unsigned int irq)
+{
+        writel(1 << irq, INT_MS(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+}
+ 
+
+static struct irqchip epxa_irq_chip = {
+	.ack		= epxa_mask_irq,
+	.mask		= epxa_mask_irq,
+	.unmask		= epxa_unmask_irq,
+};
+
+static struct resource irq_resource = {
+	.name	= "irq_handler",
+	.start	= IO_ADDRESS(EXC_INT_CTRL00_BASE),
+	.end	= IO_ADDRESS(INT_PRIORITY_FC(EXC_INT_CTRL00_BASE))+4,
+};
+
+void __init epxa10db_init_irq(void)
+{
+	unsigned int i;
+	
+	request_resource(&iomem_resource, &irq_resource);
+
+	/*
+	 * This bit sets up the interrupt controller using 
+	 * the 6 PLD interrupts mode (the default) each 
+	 * irqs is assigned a priority which is the same
+	 * as its interrupt number. This scheme is used because 
+	 * its easy, but you may want to change it depending
+	 * on the contents of your PLD
+	 */
+
+	writel(3,INT_MODE(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+	for (i = 0; i < NR_IRQS; i++){
+		writel(i+1, INT_PRIORITY_P0(IO_ADDRESS(EXC_INT_CTRL00_BASE)) + (4*i));
+		set_irq_chip(i,&epxa_irq_chip);
+		set_irq_handler(i,do_level_IRQ);
+		set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+	}
+
+	/* Disable all interrupts */
+	writel(-1,INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+
+}