sh: x3proto: ILSEL IRQ support.

This adds functionality for the on-board ILSEL IRQs that chain
IRL mode events. Many on-board devices (ethernet, usb, etc.) rely
on ILSEL IRQs directly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

include/asm-sh/ilsel.h

@@ -0,0 +1,45 @@
+#ifndef __ASM_SH_ILSEL_H
+#define __ASM_SH_ILSEL_H
+
+typedef enum {
+	ILSEL_NONE,
+	ILSEL_LAN,
+	ILSEL_USBH_I,
+	ILSEL_USBH_S,
+	ILSEL_USBH_V,
+	ILSEL_RTC,
+	ILSEL_USBP_I,
+	ILSEL_USBP_S,
+	ILSEL_USBP_V,
+	ILSEL_KEY,
+
+	/*
+	 * ILSEL Aliases - corner cases for interleaved level tables.
+	 *
+	 * Someone thought this was a good idea and less hassle than
+	 * demuxing a shared vector, really.
+	 */
+
+	/* ILSEL0 and 2 */
+	ILSEL_FPGA0,
+	ILSEL_FPGA1,
+	ILSEL_EX1,
+	ILSEL_EX2,
+	ILSEL_EX3,
+	ILSEL_EX4,
+
+	/* ILSEL1 and 3 */
+	ILSEL_FPGA2 = ILSEL_FPGA0,
+	ILSEL_FPGA3 = ILSEL_FPGA1,
+	ILSEL_EX5 = ILSEL_EX1,
+	ILSEL_EX6 = ILSEL_EX2,
+	ILSEL_EX7 = ILSEL_EX3,
+	ILSEL_EX8 = ILSEL_EX4,
+} ilsel_source_t;
+
+/* arch/sh/boards/renesas/x3proto/ilsel.c */
+int ilsel_enable(ilsel_source_t set);
+int ilsel_enable_fixed(ilsel_source_t set, unsigned int level);
+void ilsel_disable(unsigned int irq);
+
+#endif /* __ASM_SH_ILSEL_H */