patch-2.4.19 linux-2.4.19/arch/arm/mach-mx1ads/irq.c

• Lines: 74
• Date: Fri Aug 2 17:39:42 2002
• Orig file: linux-2.4.18/arch/arm/mach-mx1ads/irq.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/arm/mach-mx1ads/irq.c linux-2.4.19/arch/arm/mach-mx1ads/irq.c
@@ -0,0 +1,73 @@
+/*
+ *  linux/arch/arm/mach-mx1ads/irq.c
+ *
+ *  Copyright (C) 1999 ARM Limited
+ *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ *
+ * 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>
+
+/*
+ *
+ * We simply use the ENABLE DISABLE registers inside of the MX1
+ * to turn on/off specific interrupts.  FIXME- We should
+ * also add support for the accelerated interrupt controller
+ * by putting offets to irq jump code in the appropriate
+ * places.
+ *
+ */
+
+#define INTENNUM_OFF              0x8
+#define INTDISNUM_OFF             0xC
+
+#define VA_AITC_BASE              IO_ADDRESS(MX1ADS_AITC_BASE)
+#define MX1ADS_AITC_INTDISNUM     (VA_AITC_BASE + INTDISNUM_OFF)
+#define MX1ADS_AITC_INTENNUM      (VA_AITC_BASE + INTENNUM_OFF)
+
+static void
+mx1ads_mask_irq(unsigned int irq)
+{
+	__raw_writel(irq, MX1ADS_AITC_INTDISNUM);
+}
+
+static void
+mx1ads_unmask_irq(unsigned int irq)
+{
+	__raw_writel(irq, MX1ADS_AITC_INTENNUM);
+}
+
+void __init
+mx1ads_init_irq(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < NR_IRQS; i++) {
+		irq_desc[i].valid = 1;
+		irq_desc[i].probe_ok = 1;
+		irq_desc[i].mask_ack = mx1ads_mask_irq;
+		irq_desc[i].mask = mx1ads_mask_irq;
+		irq_desc[i].unmask = mx1ads_unmask_irq;
+	}
+
+	/* Disable all interrupts initially. */
+	/* In MX1 this is done in the bootloader. */
+}