patch-2.4.14 linux/arch/arm/mach-epxa10db/irq.c

• Lines: 71
• Date: Thu Oct 25 13:53:45 2001
• Orig file: v2.4.13/linux/arch/arm/mach-epxa10db/irq.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.13/linux/arch/arm/mach-epxa10db/irq.c linux/arch/arm/mach-epxa10db/irq.c
@@ -0,0 +1,70 @@
+/*
+ *  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 <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/mach/irq.h>
+#include <asm/arch/platform.h>
+#include <asm/arch/int_ctrl00.h>
+
+
+static void mask_irq(unsigned int irq)
+{
+        __raw_writel(1 << irq, INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+}
+
+static void unmask_irq(unsigned int irq)
+{
+        __raw_writel(1 << irq, INT_MS(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+}
+ 
+void __init epxa10db_init_irq(void)
+{
+	unsigned int i;
+	
+	/*
+	 * 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
+	 */
+
+	__raw_writel(3,INT_MODE(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+	for (i = 0; i < NR_IRQS; i++){
+		__raw_writel(i+1, INT_PRIORITY_P0(IO_ADDRESS(EXC_INT_CTRL00_BASE)) + (4*i));
+	}
+
+
+	for (i = 0; i < NR_IRQS; i++) {
+	       
+		irq_desc[i].valid	= 1;
+		irq_desc[i].probe_ok	= 1;
+		irq_desc[i].mask_ack	= mask_irq;
+		irq_desc[i].mask	= mask_irq;
+		irq_desc[i].unmask	= unmask_irq;
+	}
+
+	/* Disable all interrupt */
+	__raw_writel(-1,INT_MC(IO_ADDRESS(EXC_INT_CTRL00_BASE)));
+
+}