ARM: 5859/1: Add nuc93x platform support

The previous nuc932 support patches have been discarded by me and because it belongs to
another SoCs series named nuc93x,at present, which included nuc931 and nuc932, I think it is
better to create a new mach-nuc93x,So I made the patch,and request your advice.Thanks!

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 66 insertions, 0 deletions

diff --git a/arch/arm/mach-nuc93x/irq.c b/arch/arm/mach-nuc93x/irq.c
new file mode 100644
index 00000000000..a7a88ea4ec3
--- /dev/null
+++ b/arch/arm/mach-nuc93x/irq.c
@@ -0,0 +1,66 @@
+/*
+ * linux/arch/arm/mach-nuc93x/irq.c
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.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;version 2 of the License.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/ptrace.h>
+#include <linux/sysdev.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-irq.h>
+
+static void nuc93x_irq_mask(unsigned int irq)
+{
+	__raw_writel(1 << irq, REG_AIC_MDCR);
+}
+
+/*
+ * By the w90p910 spec,any irq,only write 1
+ * to REG_AIC_EOSCR for ACK
+ */
+
+static void nuc93x_irq_ack(unsigned int irq)
+{
+	__raw_writel(0x01, REG_AIC_EOSCR);
+}
+
+static void nuc93x_irq_unmask(unsigned int irq)
+{
+	__raw_writel(1 << irq, REG_AIC_MECR);
+
+}
+
+static struct irq_chip nuc93x_irq_chip = {
+	.ack	   = nuc93x_irq_ack,
+	.mask	   = nuc93x_irq_mask,
+	.unmask	   = nuc93x_irq_unmask,
+};
+
+void __init nuc93x_init_irq(void)
+{
+	int irqno;
+
+	__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
+
+	for (irqno = IRQ_WDT; irqno <= NR_IRQS; irqno++) {
+		set_irq_chip(irqno, &nuc93x_irq_chip);
+		set_irq_handler(irqno, handle_level_irq);
+		set_irq_flags(irqno, IRQF_VALID);
+	}
+}