1 files changed, 135 insertions, 0 deletions
diff --git a/arch/sh/boards/renesas/rts7751r2d/irq.c b/arch/sh/boards/renesas/rts7751r2d/irq.c
new file mode 100644
index 000000000000..95717f4f1e2d
--- /dev/null
+++ b/arch/sh/boards/renesas/rts7751r2d/irq.c
@@ -0,0 +1,135 @@
+/*
+ * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
+ *
+ * Copyright (C) 2000  Kazumoto Kojima
+ *
+ * Renesas Technology Sales RTS7751R2D Support.
+ *
+ * Modified for RTS7751R2D by
+ * Atom Create Engineering Co., Ltd. 2002.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/rts7751r2d/rts7751r2d.h>
+
+#if defined(CONFIG_RTS7751R2D_REV11)
+static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0};
+#else
+static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0};
+#endif
+
+extern int voyagergx_irq_demux(int irq);
+extern void setup_voyagergx_irq(void);
+
+static void enable_rts7751r2d_irq(unsigned int irq);
+static void disable_rts7751r2d_irq(unsigned int irq);
+
+/* shutdown is same as "disable" */
+#define shutdown_rts7751r2d_irq disable_rts7751r2d_irq
+
+static void ack_rts7751r2d_irq(unsigned int irq);
+static void end_rts7751r2d_irq(unsigned int irq);
+
+static unsigned int startup_rts7751r2d_irq(unsigned int irq)
+{
+	enable_rts7751r2d_irq(irq);
+	return 0; /* never anything pending */
+}
+
+static void disable_rts7751r2d_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned short val;
+	unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]);
+
+	/* Set the priority in IPR to 0 */
+	local_irq_save(flags);
+	val = ctrl_inw(IRLCNTR1);
+	val &= mask;
+	ctrl_outw(val, IRLCNTR1);
+	local_irq_restore(flags);
+}
+
+static void enable_rts7751r2d_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned short val;
+	unsigned short value = (0x0001 << mask_pos[irq]);
+
+	/* Set priority in IPR back to original value */
+	local_irq_save(flags);
+	val = ctrl_inw(IRLCNTR1);
+	val |= value;
+	ctrl_outw(val, IRLCNTR1);
+	local_irq_restore(flags);
+}
+
+int rts7751r2d_irq_demux(int irq)
+{
+	int demux_irq;
+
+	demux_irq = voyagergx_irq_demux(irq);
+	return demux_irq;
+}
+
+static void ack_rts7751r2d_irq(unsigned int irq)
+{
+	disable_rts7751r2d_irq(irq);
+}
+
+static void end_rts7751r2d_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+		enable_rts7751r2d_irq(irq);
+}
+
+static struct hw_interrupt_type rts7751r2d_irq_type = {
+	"RTS7751R2D IRQ",
+	startup_rts7751r2d_irq,
+	shutdown_rts7751r2d_irq,
+	enable_rts7751r2d_irq,
+	disable_rts7751r2d_irq,
+	ack_rts7751r2d_irq,
+	end_rts7751r2d_irq,
+};
+
+static void make_rts7751r2d_irq(unsigned int irq)
+{
+	disable_irq_nosync(irq);
+	irq_desc[irq].handler = &rts7751r2d_irq_type;
+	disable_rts7751r2d_irq(irq);
+}
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_rts7751r2d_IRQ(void)
+{
+	int i;
+
+	/* IRL0=KEY Input
+	 * IRL1=Ethernet
+	 * IRL2=CF Card
+	 * IRL3=CF Card Insert
+	 * IRL4=PCMCIA
+	 * IRL5=VOYAGER
+	 * IRL6=RTC Alarm
+	 * IRL7=RTC Timer
+	 * IRL8=SD Card
+	 * IRL9=PCI Slot #1
+	 * IRL10=PCI Slot #2
+	 * IRL11=Extention #0
+	 * IRL12=Extention #1
+	 * IRL13=Extention #2
+	 * IRL14=Extention #3
+	 */
+
+	for (i=0; i<15; i++)
+		make_rts7751r2d_irq(i);
+
+	setup_voyagergx_irq();
+}