patch-2.4.4 linux/arch/arm/mach-ebsa110/irq.c

• Lines: 56
• Date: Thu Apr 12 12:20:31 2001
• Orig file: v2.4.3/linux/arch/arm/mach-ebsa110/irq.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/arm/mach-ebsa110/irq.c linux/arch/arm/mach-ebsa110/irq.c
@@ -0,0 +1,55 @@
+/*
+ *  linux/arch/arm/mach-ebsa110/irq.c
+ *
+ *  Copyright (C) 1996-1998 Russell King
+ *
+ * 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.
+ *
+ *  Changelog:
+ *   22-08-1998	RMK	Restructured IRQ routines
+ */
+#include <linux/init.h>
+
+#include <asm/mach/irq.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+
+#include "hardware.h"
+
+static void ebsa110_mask_irq(unsigned int irq)
+{
+	__raw_writeb(1 << irq, IRQ_MCLR);
+}
+
+static void ebsa110_unmask_irq(unsigned int irq)
+{
+	__raw_writeb(1 << irq, IRQ_MSET);
+}
+ 
+void __init ebsa110_init_irq(void)
+{
+	unsigned long flags;
+	int irq;
+
+	save_flags_cli (flags);
+	__raw_writeb(0xff, IRQ_MCLR);
+	__raw_writeb(0x55, IRQ_MSET);
+	__raw_writeb(0x00, IRQ_MSET);
+	if (__raw_readb(IRQ_MASK) != 0x55)
+		while (1);
+	__raw_writeb(0xff, IRQ_MCLR);	/* clear all interrupt enables */
+	restore_flags (flags);
+
+	for (irq = 0; irq < NR_IRQS; irq++) {
+		irq_desc[irq].valid	= 1;
+		irq_desc[irq].probe_ok	= 1;
+		irq_desc[irq].mask_ack	= ebsa110_mask_irq;
+		irq_desc[irq].mask	= ebsa110_mask_irq;
+		irq_desc[irq].unmask	= ebsa110_unmask_irq;
+	}
+}
+