sh: Convert r7780rp IRQ handler to IRQ chip.

Simple conversion of the R7780RP IRQ handler to struct irq_chip.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/renesas/r7780rp/irq.c

 /*
- * linux/arch/sh/boards/renesas/r7780rp/irq.c
- *
- * Copyright (C) 2000  Kazumoto Kojima
- *
  * Renesas Solutions Highlander R7780RP-1 Support.
  *
- * Modified for R7780RP-1 by
- * Atom Create Engineering Co., Ltd. 2002.
+ * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
+ * Copyright (C) 2006  Paul Mundt
+ *
+ * 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 <asm/io.h>
-#include <asm/irq.h>
-#include <asm/r7780rp/r7780rp.h>
 
 #ifdef CONFIG_SH_R7780MP
 static int mask_pos[] = {12, 11, 9, 14, 15, 8, 13, 6, 5, 4, 3, 2, 0, 0, 1, 0};
@@ -20,71 +18,26 @@ static int mask_pos[] = {12, 11, 9, 14, 15, 8, 13, 6, 5, 4, 3, 2, 0, 0, 1, 0};
 static int mask_pos[] = {15, 14, 13, 12, 11, 10, 9, 8, 7, 5, 6, 4, 0, 1, 2, 0};
 #endif
 
-static void enable_r7780rp_irq(unsigned int irq);
-static void disable_r7780rp_irq(unsigned int irq);
-
-/* shutdown is same as "disable" */
-#define shutdown_r7780rp_irq disable_r7780rp_irq
-
-static void ack_r7780rp_irq(unsigned int irq);
-static void end_r7780rp_irq(unsigned int irq);
-
-static unsigned int startup_r7780rp_irq(unsigned int irq)
-{
-	enable_r7780rp_irq(irq);
-	return 0; /* never anything pending */
-}
-
-static void disable_r7780rp_irq(unsigned int irq)
-{
-	unsigned short val;
-	unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]);
-
-	/* Set the priority in IPR to 0 */
-	val = ctrl_inw(IRLCNTR1);
-	val &= mask;
-	ctrl_outw(val, IRLCNTR1);
-}
-
 static void enable_r7780rp_irq(unsigned int irq)
 {
-	unsigned short val;
-	unsigned short value = (0x0001 << mask_pos[irq]);
-
 	/* Set priority in IPR back to original value */
-	val = ctrl_inw(IRLCNTR1);
-	val |= value;
-	ctrl_outw(val, IRLCNTR1);
+	ctrl_outw(ctrl_inw(IRLCNTR1) | (1 << mask_pos[irq]), IRLCNTR1);
 }
 
-static void ack_r7780rp_irq(unsigned int irq)
-{
-	disable_r7780rp_irq(irq);
-}
-
-static void end_r7780rp_irq(unsigned int irq)
+static void disable_r7780rp_irq(unsigned int irq)
 {
-	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		enable_r7780rp_irq(irq);
+	/* Set the priority in IPR to 0 */
+	ctrl_outw(ctrl_inw(IRLCNTR1) & (0xffff ^ (1 << mask_pos[irq])),
+		  IRLCNTR1);
 }
 
-static struct hw_interrupt_type r7780rp_irq_type = {
-	.typename = "R7780RP-IRQ",
-	.startup = startup_r7780rp_irq,
-	.shutdown = shutdown_r7780rp_irq,
-	.enable = enable_r7780rp_irq,
-	.disable = disable_r7780rp_irq,
-	.ack = ack_r7780rp_irq,
-	.end = end_r7780rp_irq,
+static struct irq_chip r7780rp_irq_chip __read_mostly = {
+	.name		= "r7780rp",
+	.mask		= disable_r7780rp_irq,
+	.unmask		= enable_r7780rp_irq,
+	.mask_ack	= disable_r7780rp_irq,
 };
 
-static void make_r7780rp_irq(unsigned int irq)
-{
-	disable_irq_nosync(irq);
-	irq_desc[irq].chip = &r7780rp_irq_type;
-	disable_r7780rp_irq(irq);
-}
-
 /*
  * Initialize IRQ setting
  */
@@ -92,24 +45,10 @@ void __init init_r7780rp_IRQ(void)
 {
 	int i;
 
-	/* IRL0=PCI Slot #A
-	 * IRL1=PCI Slot #B
-	 * IRL2=PCI Slot #C
-	 * IRL3=PCI Slot #D
-	 * IRL4=CF Card
-	 * IRL5=CF Card Insert
-	 * IRL6=M66596
-	 * IRL7=SD Card
-	 * IRL8=Touch Panel
-	 * IRL9=SCI
-	 * IRL10=Serial
-	 * IRL11=Extention #A
-	 * IRL11=Extention #B
-	 * IRL12=Debug LAN
-	 * IRL13=Push Switch
-	 * IRL14=ZiggBee IO
-	 */
-
-	for (i=0; i<15; i++)
-		make_r7780rp_irq(i);
+	for (i = 0; i < 15; i++) {
+		disable_irq_nosync(i);
+		set_irq_chip_and_handler(i, &r7780rp_irq_chip,
+					 handle_level_irq);
+		disable_r7780rp_irq(i);
+	}
 }