1 files changed, 86 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-se/7343/irq.c b/arch/sh/boards/mach-se/7343/irq.c
new file mode 100644
index 00000000..fd45ffc4
--- /dev/null
+++ b/arch/sh/boards/mach-se/7343/irq.c
@@ -0,0 +1,86 @@
+/*
+ * linux/arch/sh/boards/se/7343/irq.c
+ *
+ * Copyright (C) 2008  Yoshihiro Shimoda
+ *
+ * Based on linux/arch/sh/boards/se/7722/irq.c
+ * Copyright (C) 2007  Nobuhiro Iwamatsu
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <mach-se/mach/se7343.h>
+
+unsigned int se7343_fpga_irq[SE7343_FPGA_IRQ_NR] = { 0, };
+
+static void disable_se7343_irq(struct irq_data *data)
+{
+	unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data);
+	__raw_writew(__raw_readw(PA_CPLD_IMSK) | 1 << bit, PA_CPLD_IMSK);
+}
+
+static void enable_se7343_irq(struct irq_data *data)
+{
+	unsigned int bit = (unsigned int)irq_data_get_irq_chip_data(data);
+	__raw_writew(__raw_readw(PA_CPLD_IMSK) & ~(1 << bit), PA_CPLD_IMSK);
+}
+
+static struct irq_chip se7343_irq_chip __read_mostly = {
+	.name		= "SE7343-FPGA",
+	.irq_mask	= disable_se7343_irq,
+	.irq_unmask	= enable_se7343_irq,
+};
+
+static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
+{
+	unsigned short intv = __raw_readw(PA_CPLD_ST);
+	unsigned int ext_irq = 0;
+
+	intv &= (1 << SE7343_FPGA_IRQ_NR) - 1;
+
+	for (; intv; intv >>= 1, ext_irq++) {
+		if (!(intv & 1))
+			continue;
+
+		generic_handle_irq(se7343_fpga_irq[ext_irq]);
+	}
+}
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_7343se_IRQ(void)
+{
+	int i, irq;
+
+	__raw_writew(0, PA_CPLD_IMSK);	/* disable all irqs */
+	__raw_writew(0x2000, 0xb03fffec);	/* mrshpc irq enable */
+
+	for (i = 0; i < SE7343_FPGA_IRQ_NR; i++) {
+		irq = create_irq();
+		if (irq < 0)
+			return;
+		se7343_fpga_irq[i] = irq;
+
+		irq_set_chip_and_handler_name(se7343_fpga_irq[i],
+					      &se7343_irq_chip,
+					      handle_level_irq,
+					      "level");
+
+		irq_set_chip_data(se7343_fpga_irq[i], (void *)i);
+	}
+
+	irq_set_chained_handler(IRQ0_IRQ, se7343_irq_demux);
+	irq_set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
+	irq_set_chained_handler(IRQ1_IRQ, se7343_irq_demux);
+	irq_set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW);
+	irq_set_chained_handler(IRQ4_IRQ, se7343_irq_demux);
+	irq_set_irq_type(IRQ4_IRQ, IRQ_TYPE_LEVEL_LOW);
+	irq_set_chained_handler(IRQ5_IRQ, se7343_irq_demux);
+	irq_set_irq_type(IRQ5_IRQ, IRQ_TYPE_LEVEL_LOW);
+}