1 files changed, 101 insertions, 0 deletions
diff --git a/arch/sh/boards/se/7722/irq.c b/arch/sh/boards/se/7722/irq.c
new file mode 100644
index 000000000000..099e5deb77f8
--- /dev/null
+++ b/arch/sh/boards/se/7722/irq.c
@@ -0,0 +1,101 @@
+/*
+ * linux/arch/sh/boards/se/7722/irq.c
+ *
+ * Copyright (C) 2007  Nobuhiro Iwamatsu
+ *
+ * Hitachi UL SolutionEngine 7722 Support.
+ *
+ * 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 <asm/irq.h>
+#include <asm/io.h>
+#include <asm/se7722.h>
+
+#define INTC_INTMSK0             0xFFD00044
+#define INTC_INTMSKCLR0          0xFFD00064
+
+static void disable_se7722_irq(unsigned int irq)
+{
+	struct ipr_data *p = get_irq_chip_data(irq);
+	ctrl_outw( ctrl_inw( p->addr ) | p->priority , p->addr );
+}
+
+static void enable_se7722_irq(unsigned int irq)
+{
+	struct ipr_data *p = get_irq_chip_data(irq);
+	ctrl_outw( ctrl_inw( p->addr ) & ~p->priority , p->addr );
+}
+
+static struct irq_chip se7722_irq_chip __read_mostly = {
+	.name           = "SE7722",
+	.mask           = disable_se7722_irq,
+	.unmask         = enable_se7722_irq,
+	.mask_ack       = disable_se7722_irq,
+};
+
+static struct ipr_data ipr_irq_table[] = {
+	/* irq        ,idx,sft, priority     , addr   */
+	{ MRSHPC_IRQ0 , 0 , 0 , MRSHPC_BIT0 , IRQ01_MASK } ,
+	{ MRSHPC_IRQ1 , 0 , 0 , MRSHPC_BIT1 , IRQ01_MASK } ,
+	{ MRSHPC_IRQ2 , 0 , 0 , MRSHPC_BIT2 , IRQ01_MASK } ,
+	{ MRSHPC_IRQ3 , 0 , 0 , MRSHPC_BIT3 , IRQ01_MASK } ,
+	{ SMC_IRQ     , 0 , 0 , SMC_BIT     , IRQ01_MASK } ,
+	{ EXT_IRQ     , 0 , 0 , EXT_BIT     , IRQ01_MASK } ,
+};
+
+int se7722_irq_demux(int irq)
+{
+
+	if ((irq == IRQ0_IRQ)||(irq == IRQ1_IRQ)) {
+		volatile unsigned short intv =
+			*(volatile unsigned short *)IRQ01_STS;
+		if (irq == IRQ0_IRQ){
+			if(intv & SMC_BIT ) {
+				return SMC_IRQ;
+			} else if(intv & USB_BIT) {
+				return USB_IRQ;
+			} else {
+				printk("intv =%04x\n", intv);
+				return SMC_IRQ;
+			}
+		} else if(irq == IRQ1_IRQ){
+			if(intv & MRSHPC_BIT0) {
+				return MRSHPC_IRQ0;
+			} else if(intv & MRSHPC_BIT1) {
+				return MRSHPC_IRQ1;
+			} else if(intv & MRSHPC_BIT2) {
+				return MRSHPC_IRQ2;
+			} else if(intv & MRSHPC_BIT3) {
+				return MRSHPC_IRQ3;
+			} else {
+				printk("BIT_EXTENTION =%04x\n", intv);
+				return EXT_IRQ;
+			}
+		}
+	}
+	return irq;
+
+}
+/*
+ * Initialize IRQ setting
+ */
+void __init init_se7722_IRQ(void)
+{
+	int i = 0;
+	ctrl_outw(0x2000, 0xb03fffec);  /* mrshpc irq enable */
+	ctrl_outl((3 << ((7 - 0) * 4))|(3 << ((7 - 1) * 4)), INTC_INTPRI0);     /* irq0 pri=3,irq1,pri=3 */
+	ctrl_outw((2 << ((7 - 0) * 2))|(2 << ((7 - 1) * 2)), INTC_ICR1);        /* irq0,1 low-level irq */
+
+	for (i = 0; i < ARRAY_SIZE(ipr_irq_table); i++) {
+		disable_irq_nosync(ipr_irq_table[i].irq);
+		set_irq_chip_and_handler_name( ipr_irq_table[i].irq, &se7722_irq_chip,
+			handle_level_irq, "level");
+		set_irq_chip_data( ipr_irq_table[i].irq, &ipr_irq_table[i] );
+		disable_se7722_irq(ipr_irq_table[i].irq);
+	}
+}