From 41bd61a8e357f79dc65502b22d9d124a619491c0 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 15 Oct 2007 00:51:34 +0100
Subject: [PATCH] [MIPS] Alchemy: cleanup interrupt code.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/au1000/common/irq.c | 654 ++++++++++++++++------------------
 1 file changed, 313 insertions(+), 341 deletions(-)

diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c
index a6640b998c..e86b430399 100644
--- a/arch/mips/au1000/common/irq.c
+++ b/arch/mips/au1000/common/irq.c
@@ -26,39 +26,18 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
-#include <linux/errno.h>
+#include <linux/bitops.h>
 #include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/types.h>
+#include <linux/io.h>
 #include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
+#include <linux/irq.h>
 
-#include <asm/bootinfo.h>
-#include <asm/io.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
 #include <asm/mach-au1x00/au1000.h>
 #ifdef CONFIG_MIPS_PB1000
 #include <asm/mach-pb1x00/pb1000.h>
 #endif
 
-#undef DEBUG_IRQ
-#ifdef DEBUG_IRQ
-/* note: prints function name for you */
-#define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
-#else
-#define DPRINTK(fmt, args...)
-#endif
-
 #define EXT_INTC0_REQ0 2 /* IP 2 */
 #define EXT_INTC0_REQ1 3 /* IP 3 */
 #define EXT_INTC1_REQ0 4 /* IP 4 */
@@ -69,16 +48,98 @@ void	(*board_init_irq)(void);
 
 static DEFINE_SPINLOCK(irq_lock);
 
+#ifdef CONFIG_PM
+
+/*
+ * Save/restore the interrupt controller state.
+ * Called from the save/restore core registers as part of the
+ * au_sleep function in power.c.....maybe I should just pm_register()
+ * them instead?
+ */
+static unsigned int	sleep_intctl_config0[2];
+static unsigned int	sleep_intctl_config1[2];
+static unsigned int	sleep_intctl_config2[2];
+static unsigned int	sleep_intctl_src[2];
+static unsigned int	sleep_intctl_assign[2];
+static unsigned int	sleep_intctl_wake[2];
+static unsigned int	sleep_intctl_mask[2];
+
+void save_au1xxx_intctl(void)
+{
+	sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
+	sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
+	sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
+	sleep_intctl_src[0] = au_readl(IC0_SRCRD);
+	sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
+	sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
+	sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
+
+	sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
+	sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
+	sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
+	sleep_intctl_src[1] = au_readl(IC1_SRCRD);
+	sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
+	sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
+	sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
+}
+
+/*
+ * For most restore operations, we clear the entire register and
+ * then set the bits we found during the save.
+ */
+void restore_au1xxx_intctl(void)
+{
+	au_writel(0xffffffff, IC0_MASKCLR); au_sync();
+
+	au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
+	au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
+	au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
+	au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
+	au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
+	au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
+	au_writel(0xffffffff, IC0_SRCCLR); au_sync();
+	au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
+	au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
+	au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
+	au_writel(0xffffffff, IC0_WAKECLR); au_sync();
+	au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
+	au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
+	au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
+	au_writel(0x00000000, IC0_TESTBIT); au_sync();
+
+	au_writel(0xffffffff, IC1_MASKCLR); au_sync();
+
+	au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
+	au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
+	au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
+	au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
+	au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
+	au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
+	au_writel(0xffffffff, IC1_SRCCLR); au_sync();
+	au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
+	au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
+	au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
+	au_writel(0xffffffff, IC1_WAKECLR); au_sync();
+	au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
+	au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
+	au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
+	au_writel(0x00000000, IC1_TESTBIT); au_sync();
+
+	au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
+
+	au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
+}
+#endif /* CONFIG_PM */
+
 
 inline void local_enable_irq(unsigned int irq_nr)
 {
 	if (irq_nr > AU1000_LAST_INTC0_INT) {
-		au_writel(1<<(irq_nr-32), IC1_MASKSET);
-		au_writel(1<<(irq_nr-32), IC1_WAKESET);
-	}
-	else {
-		au_writel(1<<irq_nr, IC0_MASKSET);
-		au_writel(1<<irq_nr, IC0_WAKESET);
+		au_writel(1 << (irq_nr - 32), IC1_MASKSET);
+		au_writel(1 << (irq_nr - 32), IC1_WAKESET);
+	} else {
+		au_writel(1 << irq_nr, IC0_MASKSET);
+		au_writel(1 << irq_nr, IC0_WAKESET);
 	}
 	au_sync();
 }
@@ -87,12 +148,11 @@ inline void local_enable_irq(unsigned int irq_nr)
 inline void local_disable_irq(unsigned int irq_nr)
 {
 	if (irq_nr > AU1000_LAST_INTC0_INT) {
-		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
-		au_writel(1<<(irq_nr-32), IC1_WAKECLR);
-	}
-	else {
-		au_writel(1<<irq_nr, IC0_MASKCLR);
-		au_writel(1<<irq_nr, IC0_WAKECLR);
+		au_writel(1 << (irq_nr - 32), IC1_MASKCLR);
+		au_writel(1 << (irq_nr - 32), IC1_WAKECLR);
+	} else {
+		au_writel(1 << irq_nr, IC0_MASKCLR);
+		au_writel(1 << irq_nr, IC0_WAKECLR);
 	}
 	au_sync();
 }
@@ -101,12 +161,11 @@ inline void local_disable_irq(unsigned int irq_nr)
 static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr)
 {
 	if (irq_nr > AU1000_LAST_INTC0_INT) {
-		au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
-		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
-	}
-	else {
-		au_writel(1<<irq_nr, IC0_RISINGCLR);
-		au_writel(1<<irq_nr, IC0_MASKCLR);
+		au_writel(1 << (irq_nr - 32), IC1_RISINGCLR);
+		au_writel(1 << (irq_nr - 32), IC1_MASKCLR);
+	} else {
+		au_writel(1 << irq_nr, IC0_RISINGCLR);
+		au_writel(1 << irq_nr, IC0_MASKCLR);
 	}
 	au_sync();
 }
@@ -115,12 +174,11 @@ static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr)
 static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr)
 {
 	if (irq_nr > AU1000_LAST_INTC0_INT) {
-		au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
-		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
-	}
-	else {
-		au_writel(1<<irq_nr, IC0_FALLINGCLR);
-		au_writel(1<<irq_nr, IC0_MASKCLR);
+		au_writel(1 << (irq_nr - 32), IC1_FALLINGCLR);
+		au_writel(1 << (irq_nr - 32), IC1_MASKCLR);
+	} else {
+		au_writel(1 << irq_nr, IC0_FALLINGCLR);
+		au_writel(1 << irq_nr, IC0_MASKCLR);
 	}
 	au_sync();
 }
@@ -132,14 +190,13 @@ static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr)
 	 * both edges at once, or if we do, that we don't care.
 	 */
 	if (irq_nr > AU1000_LAST_INTC0_INT) {
-		au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
-		au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
-		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
-	}
-	else {
-		au_writel(1<<irq_nr, IC0_FALLINGCLR);
-		au_writel(1<<irq_nr, IC0_RISINGCLR);
-		au_writel(1<<irq_nr, IC0_MASKCLR);
+		au_writel(1 << (irq_nr - 32), IC1_FALLINGCLR);
+		au_writel(1 << (irq_nr - 32), IC1_RISINGCLR);
+		au_writel(1 << (irq_nr - 32), IC1_MASKCLR);
+	} else {
+		au_writel(1 << irq_nr, IC0_FALLINGCLR);
+		au_writel(1 << irq_nr, IC0_RISINGCLR);
+		au_writel(1 << irq_nr, IC0_MASKCLR);
 	}
 	au_sync();
 }
@@ -162,9 +219,9 @@ static inline void mask_and_ack_level_irq(unsigned int irq_nr)
 
 static void end_irq(unsigned int irq_nr)
 {
-	if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
+	if (!(irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
 		local_enable_irq(irq_nr);
-	}
+
 #if defined(CONFIG_MIPS_PB1000)
 	if (irq_nr == AU1000_GPIO_15) {
 		au_writel(0x4000, PB1000_MDR); /* enable int */
@@ -181,15 +238,12 @@ unsigned long save_local_and_disable(int controller)
 	spin_lock_irqsave(&irq_lock, flags);
 	if (controller) {
 		mask = au_readl(IC1_MASKSET);
-		for (i=32; i<64; i++) {
+		for (i = 32; i < 64; i++)
 			local_disable_irq(i);
-		}
-	}
-	else {
+	} else {
 		mask = au_readl(IC0_MASKSET);
-		for (i=0; i<32; i++) {
+		for (i = 0; i < 32; i++)
 			local_disable_irq(i);
-		}
 	}
 	spin_unlock_irqrestore(&irq_lock, flags);
 
@@ -202,10 +256,10 @@ void restore_local_and_enable(int controller, unsigned long mask)
 	unsigned long flags, new_mask;
 
 	spin_lock_irqsave(&irq_lock, flags);
-	for (i=0; i<32; i++) {
-		if (mask & (1<<i)) {
+	for (i = 0; i < 32; i++) {
+		if (mask & (1 << i)) {
 			if (controller)
-				local_enable_irq(i+32);
+				local_enable_irq(i + 32);
 			else
 				local_enable_irq(i);
 		}
@@ -220,39 +274,39 @@ void restore_local_and_enable(int controller, unsigned long mask)
 
 
 static struct irq_chip rise_edge_irq_type = {
-	.name = "Au1000 Rise Edge",
-	.ack = mask_and_ack_rise_edge_irq,
-	.mask = local_disable_irq,
-	.mask_ack = mask_and_ack_rise_edge_irq,
-	.unmask = local_enable_irq,
-	.end = end_irq,
+	.name		= "Au1000 Rise Edge",
+	.ack		= mask_and_ack_rise_edge_irq,
+	.mask		= local_disable_irq,
+	.mask_ack	= mask_and_ack_rise_edge_irq,
+	.unmask		= local_enable_irq,
+	.end		= end_irq,
 };
 
 static struct irq_chip fall_edge_irq_type = {
-	.name = "Au1000 Fall Edge",
-	.ack = mask_and_ack_fall_edge_irq,
-	.mask = local_disable_irq,
-	.mask_ack = mask_and_ack_fall_edge_irq,
-	.unmask = local_enable_irq,
-	.end = end_irq,
+	.name		= "Au1000 Fall Edge",
+	.ack		= mask_and_ack_fall_edge_irq,
+	.mask		= local_disable_irq,
+	.mask_ack	= mask_and_ack_fall_edge_irq,
+	.unmask		= local_enable_irq,
+	.end		= end_irq,
 };
 
 static struct irq_chip either_edge_irq_type = {
-	.name = "Au1000 Rise or Fall Edge",
-	.ack = mask_and_ack_either_edge_irq,
-	.mask = local_disable_irq,
-	.mask_ack = mask_and_ack_either_edge_irq,
-	.unmask = local_enable_irq,
-	.end = end_irq,
+	.name		= "Au1000 Rise or Fall Edge",
+	.ack		= mask_and_ack_either_edge_irq,
+	.mask		= local_disable_irq,
+	.mask_ack	= mask_and_ack_either_edge_irq,
+	.unmask		= local_enable_irq,
+	.end		= end_irq,
 };
 
 static struct irq_chip level_irq_type = {
-	.name = "Au1000 Level",
-	.ack = mask_and_ack_level_irq,
-	.mask = local_disable_irq,
-	.mask_ack = mask_and_ack_level_irq,
-	.unmask = local_enable_irq,
-	.end = end_irq,
+	.name		= "Au1000 Level",
+	.ack		= mask_and_ack_level_irq,
+	.mask		= local_disable_irq,
+	.mask_ack	= mask_and_ack_level_irq,
+	.unmask		= local_enable_irq,
+	.end		= end_irq,
 };
 
 #ifdef CONFIG_PM
@@ -263,7 +317,8 @@ void startup_match20_interrupt(irq_handler_t handler)
 	static struct irqaction action;
 	memset(&action, 0, sizeof(struct irqaction));
 
-	/* This is a big problem.... since we didn't use request_irq
+	/*
+	 * This is a big problem.... since we didn't use request_irq
 	 * when kernel/irq.c calls probe_irq_xxx this interrupt will
 	 * be probed for usage. This will end up disabling the device :(
 	 * Give it a bogus "action" pointer -- this will keep it from
@@ -292,173 +347,112 @@ static void setup_local_irq(unsigned int irq_nr, int type, int int_req)
 	/* Config2[n], Config1[n], Config0[n] */
 	if (irq_nr > AU1000_LAST_INTC0_INT) {
 		switch (type) {
-			case INTC_INT_RISE_EDGE: /* 0:0:1 */
-				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG0SET);
-				set_irq_chip(irq_nr, &rise_edge_irq_type);
-				break;
-			case INTC_INT_FALL_EDGE: /* 0:1:0 */
-				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG1SET);
-				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
-				set_irq_chip(irq_nr, &fall_edge_irq_type);
-				break;
-			case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
-				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG1SET);
-				au_writel(1<<(irq_nr-32), IC1_CFG0SET);
-				set_irq_chip(irq_nr, &either_edge_irq_type);
-				break;
-			case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
-				au_writel(1<<(irq_nr-32), IC1_CFG2SET);
-				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG0SET);
-				set_irq_chip(irq_nr, &level_irq_type);
-				break;
-			case INTC_INT_LOW_LEVEL: /* 1:1:0 */
-				au_writel(1<<(irq_nr-32), IC1_CFG2SET);
-				au_writel(1<<(irq_nr-32), IC1_CFG1SET);
-				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
-				set_irq_chip(irq_nr, &level_irq_type);
-				break;
-			case INTC_INT_DISABLED: /* 0:0:0 */
-				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
-				break;
-			default: /* disable the interrupt */
-				printk("unexpected int type %d (irq %d)\n", type, irq_nr);
-				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
-				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
-				return;
+		case INTC_INT_RISE_EDGE: /* 0:0:1 */
+			au_writel(1 << (irq_nr - 32), IC1_CFG2CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG0SET);
+			set_irq_chip(irq_nr, &rise_edge_irq_type);
+			break;
+		case INTC_INT_FALL_EDGE: /* 0:1:0 */
+			au_writel(1 << (irq_nr - 32), IC1_CFG2CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1SET);
+			au_writel(1 << (irq_nr - 32), IC1_CFG0CLR);
+			set_irq_chip(irq_nr, &fall_edge_irq_type);
+			break;
+		case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
+			au_writel(1 << (irq_nr - 32), IC1_CFG2CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1SET);
+			au_writel(1 << (irq_nr - 32), IC1_CFG0SET);
+			set_irq_chip(irq_nr, &either_edge_irq_type);
+			break;
+		case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
+			au_writel(1 << (irq_nr - 32), IC1_CFG2SET);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG0SET);
+			set_irq_chip(irq_nr, &level_irq_type);
+			break;
+		case INTC_INT_LOW_LEVEL: /* 1:1:0 */
+			au_writel(1 << (irq_nr - 32), IC1_CFG2SET);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1SET);
+			au_writel(1 << (irq_nr - 32), IC1_CFG0CLR);
+			set_irq_chip(irq_nr, &level_irq_type);
+			break;
+		case INTC_INT_DISABLED: /* 0:0:0 */
+			au_writel(1 << (irq_nr - 32), IC1_CFG0CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG2CLR);
+			break;
+		default: /* disable the interrupt */
+			printk(KERN_WARNING "unexpected int type %d (irq %d)\n",
+			       type, irq_nr);
+			au_writel(1 << (irq_nr - 32), IC1_CFG0CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG1CLR);
+			au_writel(1 << (irq_nr - 32), IC1_CFG2CLR);
+			return;
 		}
 		if (int_req) /* assign to interrupt request 1 */
-			au_writel(1<<(irq_nr-32), IC1_ASSIGNCLR);
+			au_writel(1 << (irq_nr - 32), IC1_ASSIGNCLR);
 		else	     /* assign to interrupt request 0 */
-			au_writel(1<<(irq_nr-32), IC1_ASSIGNSET);
-		au_writel(1<<(irq_nr-32), IC1_SRCSET);
-		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
-		au_writel(1<<(irq_nr-32), IC1_WAKECLR);
-	}
-	else {
+			au_writel(1 << (irq_nr - 32), IC1_ASSIGNSET);
+		au_writel(1 << (irq_nr - 32), IC1_SRCSET);
+		au_writel(1 << (irq_nr - 32), IC1_MASKCLR);
+		au_writel(1 << (irq_nr - 32), IC1_WAKECLR);
+	} else {
 		switch (type) {
-			case INTC_INT_RISE_EDGE: /* 0:0:1 */
-				au_writel(1<<irq_nr, IC0_CFG2CLR);
-				au_writel(1<<irq_nr, IC0_CFG1CLR);
-				au_writel(1<<irq_nr, IC0_CFG0SET);
-				set_irq_chip(irq_nr, &rise_edge_irq_type);
-				break;
-			case INTC_INT_FALL_EDGE: /* 0:1:0 */
-				au_writel(1<<irq_nr, IC0_CFG2CLR);
-				au_writel(1<<irq_nr, IC0_CFG1SET);
-				au_writel(1<<irq_nr, IC0_CFG0CLR);
-				set_irq_chip(irq_nr, &fall_edge_irq_type);
-				break;
-			case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
-				au_writel(1<<irq_nr, IC0_CFG2CLR);
-				au_writel(1<<irq_nr, IC0_CFG1SET);
-				au_writel(1<<irq_nr, IC0_CFG0SET);
-				set_irq_chip(irq_nr, &either_edge_irq_type);
-				break;
-			case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
-				au_writel(1<<irq_nr, IC0_CFG2SET);
-				au_writel(1<<irq_nr, IC0_CFG1CLR);
-				au_writel(1<<irq_nr, IC0_CFG0SET);
-				set_irq_chip(irq_nr, &level_irq_type);
-				break;
-			case INTC_INT_LOW_LEVEL: /* 1:1:0 */
-				au_writel(1<<irq_nr, IC0_CFG2SET);
-				au_writel(1<<irq_nr, IC0_CFG1SET);
-				au_writel(1<<irq_nr, IC0_CFG0CLR);
-				set_irq_chip(irq_nr, &level_irq_type);
-				break;
-			case INTC_INT_DISABLED: /* 0:0:0 */
-				au_writel(1<<irq_nr, IC0_CFG0CLR);
-				au_writel(1<<irq_nr, IC0_CFG1CLR);
-				au_writel(1<<irq_nr, IC0_CFG2CLR);
-				break;
-			default: /* disable the interrupt */
-				printk("unexpected int type %d (irq %d)\n", type, irq_nr);
-				au_writel(1<<irq_nr, IC0_CFG0CLR);
-				au_writel(1<<irq_nr, IC0_CFG1CLR);
-				au_writel(1<<irq_nr, IC0_CFG2CLR);
-				return;
+		case INTC_INT_RISE_EDGE: /* 0:0:1 */
+			au_writel(1 << irq_nr, IC0_CFG2CLR);
+			au_writel(1 << irq_nr, IC0_CFG1CLR);
+			au_writel(1 << irq_nr, IC0_CFG0SET);
+			set_irq_chip(irq_nr, &rise_edge_irq_type);
+			break;
+		case INTC_INT_FALL_EDGE: /* 0:1:0 */
+			au_writel(1 << irq_nr, IC0_CFG2CLR);
+			au_writel(1 << irq_nr, IC0_CFG1SET);
+			au_writel(1 << irq_nr, IC0_CFG0CLR);
+			set_irq_chip(irq_nr, &fall_edge_irq_type);
+			break;
+		case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
+			au_writel(1 << irq_nr, IC0_CFG2CLR);
+			au_writel(1 << irq_nr, IC0_CFG1SET);
+			au_writel(1 << irq_nr, IC0_CFG0SET);
+			set_irq_chip(irq_nr, &either_edge_irq_type);
+			break;
+		case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
+			au_writel(1 << irq_nr, IC0_CFG2SET);
+			au_writel(1 << irq_nr, IC0_CFG1CLR);
+			au_writel(1 << irq_nr, IC0_CFG0SET);
+			set_irq_chip(irq_nr, &level_irq_type);
+			break;
+		case INTC_INT_LOW_LEVEL: /* 1:1:0 */
+			au_writel(1 << irq_nr, IC0_CFG2SET);
+			au_writel(1 << irq_nr, IC0_CFG1SET);
+			au_writel(1 << irq_nr, IC0_CFG0CLR);
+			set_irq_chip(irq_nr, &level_irq_type);
+			break;
+		case INTC_INT_DISABLED: /* 0:0:0 */
+			au_writel(1 << irq_nr, IC0_CFG0CLR);
+			au_writel(1 << irq_nr, IC0_CFG1CLR);
+			au_writel(1 << irq_nr, IC0_CFG2CLR);
+			break;
+		default: /* disable the interrupt */
+			printk(KERN_WARNING "unexpected int type %d (irq %d)\n",
+			       type, irq_nr);
+			au_writel(1 << irq_nr, IC0_CFG0CLR);
+			au_writel(1 << irq_nr, IC0_CFG1CLR);
+			au_writel(1 << irq_nr, IC0_CFG2CLR);
+			return;
 		}
 		if (int_req) /* assign to interrupt request 1 */
-			au_writel(1<<irq_nr, IC0_ASSIGNCLR);
+			au_writel(1 << irq_nr, IC0_ASSIGNCLR);
 		else	     /* assign to interrupt request 0 */
-			au_writel(1<<irq_nr, IC0_ASSIGNSET);
-		au_writel(1<<irq_nr, IC0_SRCSET);
-		au_writel(1<<irq_nr, IC0_MASKCLR);
-		au_writel(1<<irq_nr, IC0_WAKECLR);
+			au_writel(1 << irq_nr, IC0_ASSIGNSET);
+		au_writel(1 << irq_nr, IC0_SRCSET);
+		au_writel(1 << irq_nr, IC0_MASKCLR);
+		au_writel(1 << irq_nr, IC0_WAKECLR);
 	}
 	au_sync();
 }
 
-
-void __init arch_init_irq(void)
-{
-	int i;
-	unsigned long cp0_status;
-	au1xxx_irq_map_t *imp;
-	extern au1xxx_irq_map_t au1xxx_irq_map[];
-	extern au1xxx_irq_map_t au1xxx_ic0_map[];
-	extern int au1xxx_nr_irqs;
-	extern int au1xxx_ic0_nr_irqs;
-
-	cp0_status = read_c0_status();
-
-	/* Initialize interrupt controllers to a safe state.
-	*/
-	au_writel(0xffffffff, IC0_CFG0CLR);
-	au_writel(0xffffffff, IC0_CFG1CLR);
-	au_writel(0xffffffff, IC0_CFG2CLR);
-	au_writel(0xffffffff, IC0_MASKCLR);
-	au_writel(0xffffffff, IC0_ASSIGNSET);
-	au_writel(0xffffffff, IC0_WAKECLR);
-	au_writel(0xffffffff, IC0_SRCSET);
-	au_writel(0xffffffff, IC0_FALLINGCLR);
-	au_writel(0xffffffff, IC0_RISINGCLR);
-	au_writel(0x00000000, IC0_TESTBIT);
-
-	au_writel(0xffffffff, IC1_CFG0CLR);
-	au_writel(0xffffffff, IC1_CFG1CLR);
-	au_writel(0xffffffff, IC1_CFG2CLR);
-	au_writel(0xffffffff, IC1_MASKCLR);
-	au_writel(0xffffffff, IC1_ASSIGNSET);
-	au_writel(0xffffffff, IC1_WAKECLR);
-	au_writel(0xffffffff, IC1_SRCSET);
-	au_writel(0xffffffff, IC1_FALLINGCLR);
-	au_writel(0xffffffff, IC1_RISINGCLR);
-	au_writel(0x00000000, IC1_TESTBIT);
-
-	/* Initialize IC0, which is fixed per processor.
-	*/
-	imp = au1xxx_ic0_map;
-	for (i=0; i<au1xxx_ic0_nr_irqs; i++) {
-		setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
-		imp++;
-	}
-
-	/* Now set up the irq mapping for the board.
-	*/
-	imp = au1xxx_irq_map;
-	for (i=0; i<au1xxx_nr_irqs; i++) {
-		setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
-		imp++;
-	}
-
-	set_c0_status(ALLINTS);
-
-	/* Board specific IRQ initialization.
-	*/
-	if (board_init_irq)
-		(*board_init_irq)();
-}
-
-
 /*
  * Interrupts are nested. Even if an interrupt handler is registered
  * as "fast", we might get another interrupt before we return from
@@ -468,26 +462,27 @@ void __init arch_init_irq(void)
 static void intc0_req0_irqdispatch(void)
 {
 	int irq = 0;
-	static unsigned long intc0_req0 = 0;
+	static unsigned long intc0_req0;
 
 	intc0_req0 |= au_readl(IC0_REQ0INT);
 
 	if (!intc0_req0)
 		return;
+
 #ifdef AU1000_USB_DEV_REQ_INT
 	/*
 	 * Because of the tight timing of SETUP token to reply
 	 * transactions, the USB devices-side packet complete
 	 * interrupt needs the highest priority.
 	 */
-	if ((intc0_req0 & (1<<AU1000_USB_DEV_REQ_INT))) {
-		intc0_req0 &= ~(1<<AU1000_USB_DEV_REQ_INT);
+	if ((intc0_req0 & (1 << AU1000_USB_DEV_REQ_INT))) {
+		intc0_req0 &= ~(1 << AU1000_USB_DEV_REQ_INT);
 		do_IRQ(AU1000_USB_DEV_REQ_INT);
 		return;
 	}
 #endif
 	irq = au_ffs(intc0_req0) - 1;
-	intc0_req0 &= ~(1<<irq);
+	intc0_req0 &= ~(1 << irq);
 	do_IRQ(irq);
 }
 
@@ -495,7 +490,7 @@ static void intc0_req0_irqdispatch(void)
 static void intc0_req1_irqdispatch(void)
 {
 	int irq = 0;
-	static unsigned long intc0_req1 = 0;
+	static unsigned long intc0_req1;
 
 	intc0_req1 |= au_readl(IC0_REQ1INT);
 
@@ -503,7 +498,7 @@ static void intc0_req1_irqdispatch(void)
 		return;
 
 	irq = au_ffs(intc0_req1) - 1;
-	intc0_req1 &= ~(1<<irq);
+	intc0_req1 &= ~(1 << irq);
 	do_IRQ(irq);
 }
 
@@ -515,7 +510,7 @@ static void intc0_req1_irqdispatch(void)
 static void intc1_req0_irqdispatch(void)
 {
 	int irq = 0;
-	static unsigned long intc1_req0 = 0;
+	static unsigned long intc1_req0;
 
 	intc1_req0 |= au_readl(IC1_REQ0INT);
 
@@ -523,7 +518,7 @@ static void intc1_req0_irqdispatch(void)
 		return;
 
 	irq = au_ffs(intc1_req0) - 1;
-	intc1_req0 &= ~(1<<irq);
+	intc1_req0 &= ~(1 << irq);
 	irq += 32;
 	do_IRQ(irq);
 }
@@ -532,7 +527,7 @@ static void intc1_req0_irqdispatch(void)
 static void intc1_req1_irqdispatch(void)
 {
 	int irq = 0;
-	static unsigned long intc1_req1 = 0;
+	static unsigned long intc1_req1;
 
 	intc1_req1 |= au_readl(IC1_REQ1INT);
 
@@ -540,94 +535,11 @@ static void intc1_req1_irqdispatch(void)
 		return;
 
 	irq = au_ffs(intc1_req1) - 1;
-	intc1_req1 &= ~(1<<irq);
+	intc1_req1 &= ~(1 << irq);
 	irq += 32;
 	do_IRQ(irq);
 }
 
-#ifdef CONFIG_PM
-
-/* Save/restore the interrupt controller state.
- * Called from the save/restore core registers as part of the
- * au_sleep function in power.c.....maybe I should just pm_register()
- * them instead?
- */
-static unsigned int	sleep_intctl_config0[2];
-static unsigned int	sleep_intctl_config1[2];
-static unsigned int	sleep_intctl_config2[2];
-static unsigned int	sleep_intctl_src[2];
-static unsigned int	sleep_intctl_assign[2];
-static unsigned int	sleep_intctl_wake[2];
-static unsigned int	sleep_intctl_mask[2];
-
-void
-save_au1xxx_intctl(void)
-{
-	sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
-	sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
-	sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
-	sleep_intctl_src[0] = au_readl(IC0_SRCRD);
-	sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
-	sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
-	sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
-
-	sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
-	sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
-	sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
-	sleep_intctl_src[1] = au_readl(IC1_SRCRD);
-	sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
-	sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
-	sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
-}
-
-/* For most restore operations, we clear the entire register and
- * then set the bits we found during the save.
- */
-void
-restore_au1xxx_intctl(void)
-{
-	au_writel(0xffffffff, IC0_MASKCLR); au_sync();
-
-	au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
-	au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
-	au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
-	au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
-	au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
-	au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
-	au_writel(0xffffffff, IC0_SRCCLR); au_sync();
-	au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
-	au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
-	au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
-	au_writel(0xffffffff, IC0_WAKECLR); au_sync();
-	au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
-	au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
-	au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
-	au_writel(0x00000000, IC0_TESTBIT); au_sync();
-
-	au_writel(0xffffffff, IC1_MASKCLR); au_sync();
-
-	au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
-	au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
-	au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
-	au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
-	au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
-	au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
-	au_writel(0xffffffff, IC1_SRCCLR); au_sync();
-	au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
-	au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
-	au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
-	au_writel(0xffffffff, IC1_WAKECLR); au_sync();
-	au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
-	au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
-	au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
-	au_writel(0x00000000, IC1_TESTBIT); au_sync();
-
-	au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
-
-	au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
-}
-#endif /* CONFIG_PM */
-
 asmlinkage void plat_irq_dispatch(void)
 {
 	unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
@@ -645,3 +557,63 @@ asmlinkage void plat_irq_dispatch(void)
 	else
 		spurious_interrupt();
 }
+
+void __init arch_init_irq(void)
+{
+	int i;
+	unsigned long cp0_status;
+	au1xxx_irq_map_t *imp;
+	extern au1xxx_irq_map_t au1xxx_irq_map[];
+	extern au1xxx_irq_map_t au1xxx_ic0_map[];
+	extern int au1xxx_nr_irqs;
+	extern int au1xxx_ic0_nr_irqs;
+
+	cp0_status = read_c0_status();
+
+	/* Initialize interrupt controllers to a safe state.
+	*/
+	au_writel(0xffffffff, IC0_CFG0CLR);
+	au_writel(0xffffffff, IC0_CFG1CLR);
+	au_writel(0xffffffff, IC0_CFG2CLR);
+	au_writel(0xffffffff, IC0_MASKCLR);
+	au_writel(0xffffffff, IC0_ASSIGNSET);
+	au_writel(0xffffffff, IC0_WAKECLR);
+	au_writel(0xffffffff, IC0_SRCSET);
+	au_writel(0xffffffff, IC0_FALLINGCLR);
+	au_writel(0xffffffff, IC0_RISINGCLR);
+	au_writel(0x00000000, IC0_TESTBIT);
+
+	au_writel(0xffffffff, IC1_CFG0CLR);
+	au_writel(0xffffffff, IC1_CFG1CLR);
+	au_writel(0xffffffff, IC1_CFG2CLR);
+	au_writel(0xffffffff, IC1_MASKCLR);
+	au_writel(0xffffffff, IC1_ASSIGNSET);
+	au_writel(0xffffffff, IC1_WAKECLR);
+	au_writel(0xffffffff, IC1_SRCSET);
+	au_writel(0xffffffff, IC1_FALLINGCLR);
+	au_writel(0xffffffff, IC1_RISINGCLR);
+	au_writel(0x00000000, IC1_TESTBIT);
+
+	/* Initialize IC0, which is fixed per processor.
+	*/
+	imp = au1xxx_ic0_map;
+	for (i = 0; i < au1xxx_ic0_nr_irqs; i++) {
+		setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
+		imp++;
+	}
+
+	/* Now set up the irq mapping for the board.
+	*/
+	imp = au1xxx_irq_map;
+	for (i = 0; i < au1xxx_nr_irqs; i++) {
+		setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
+		imp++;
+	}
+
+	set_c0_status(ALLINTS);
+
+	/* Board specific IRQ initialization.
+	*/
+	if (board_init_irq)
+		(*board_init_irq)();
+}
-- 
2.39.5