Add c fiq handler.

2 files changed, 61 insertions, 10 deletions

diff --git a/arch/arm/plat-s3c24xx/include/plat/irq.h b/arch/arm/plat-s3c24xx/include/plat/irq.h
index 69e1be8bec3..11a866466d8 100644
--- a/arch/arm/plat-s3c24xx/include/plat/irq.h
+++ b/arch/arm/plat-s3c24xx/include/plat/irq.h
@@ -12,6 +12,7 @@
 
 #include <linux/io.h>
 
+#include <mach/irqs.h>
 #include <mach/hardware.h>
 #include <mach/regs-irq.h>
 #include <mach/regs-gpio.h>
@@ -31,8 +32,15 @@ s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
 {
 	unsigned long mask;
 	unsigned long submask;
+#ifdef CONFIG_S3C2440_C_FIQ
+	unsigned long flags;
+#endif
 
 	submask = __raw_readl(S3C2410_INTSUBMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_save_flags(flags);
+	local_fiq_disable();
+#endif
 	mask = __raw_readl(S3C2410_INTMSK);
 
 	submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
@@ -45,6 +53,9 @@ s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
 
 	/* write back masks */
 	__raw_writel(submask, S3C2410_INTSUBMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_irq_restore(flags);
+#endif
 
 }
 
@@ -53,8 +64,15 @@ s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
 {
 	unsigned long mask;
 	unsigned long submask;
+#ifdef CONFIG_S3C2440_C_FIQ
+	unsigned long flags;
+#endif
 
 	submask = __raw_readl(S3C2410_INTSUBMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_save_flags(flags);
+	local_fiq_disable();
+#endif
 	mask = __raw_readl(S3C2410_INTMSK);
 
 	submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
@@ -63,6 +81,9 @@ s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
 	/* write back masks */
 	__raw_writel(submask, S3C2410_INTSUBMSK);
 	__raw_writel(mask, S3C2410_INTMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_irq_restore(flags);
+#endif
 }
 
 
diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c
index 958737775ad..4b21ac9d693 100644
--- a/arch/arm/plat-s3c24xx/irq.c
+++ b/arch/arm/plat-s3c24xx/irq.c
@@ -28,6 +28,8 @@
 #include <asm/mach/irq.h>
 
 #include <plat/regs-irqtype.h>
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
 
 #include <plat/cpu.h>
 #include <plat/pm.h>
@@ -37,12 +39,20 @@ static void
 s3c_irq_mask(unsigned int irqno)
 {
 	unsigned long mask;
-
+#ifdef CONFIG_S3C2440_C_FIQ
+	unsigned long flags;
+#endif
 	irqno -= IRQ_EINT0;
-
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_save_flags(flags);
+	local_fiq_disable();
+#endif
 	mask = __raw_readl(S3C2410_INTMSK);
 	mask |= 1UL << irqno;
 	__raw_writel(mask, S3C2410_INTMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_irq_restore(flags);
+#endif
 }
 
 static inline void
@@ -59,9 +69,19 @@ s3c_irq_maskack(unsigned int irqno)
 {
 	unsigned long bitval = 1UL << (irqno - IRQ_EINT0);
 	unsigned long mask;
-
+#ifdef CONFIG_S3C2440_C_FIQ
+	unsigned long flags;
+#endif
+
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_save_flags(flags);
+	local_fiq_disable();
+#endif
 	mask = __raw_readl(S3C2410_INTMSK);
 	__raw_writel(mask|bitval, S3C2410_INTMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_irq_restore(flags);
+#endif
 
 	__raw_writel(bitval, S3C2410_SRCPND);
 	__raw_writel(bitval, S3C2410_INTPND);
@@ -72,15 +92,25 @@ static void
 s3c_irq_unmask(unsigned int irqno)
 {
 	unsigned long mask;
+#ifdef CONFIG_S3C2440_C_FIQ
+	unsigned long flags;
+#endif
 
 	if (irqno != IRQ_TIMER4 && irqno != IRQ_EINT8t23)
 		irqdbf2("s3c_irq_unmask %d\n", irqno);
 
 	irqno -= IRQ_EINT0;
 
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_save_flags(flags);
+	local_fiq_disable();
+#endif
 	mask = __raw_readl(S3C2410_INTMSK);
 	mask &= ~(1UL << irqno);
 	__raw_writel(mask, S3C2410_INTMSK);
+#ifdef CONFIG_S3C2440_C_FIQ
+	local_irq_restore(flags);
+#endif
 }
 
 struct irq_chip s3c_irq_level_chip = {
@@ -523,26 +553,26 @@ void __init s3c24xx_init_irq(void)
 
 	last = 0;
 	for (i = 0; i < 4; i++) {
-		pend = __raw_readl(S3C2410_INTPND);
+		pend = __raw_readl(S3C2410_SUBSRCPND);
 
 		if (pend == 0 || pend == last)
 			break;
 
-		__raw_writel(pend, S3C2410_SRCPND);
-		__raw_writel(pend, S3C2410_INTPND);
-		printk("irq: clearing pending status %08x\n", (int)pend);
+		printk("irq: clearing subpending status %08x\n", (int)pend);
+		__raw_writel(pend, S3C2410_SUBSRCPND);
 		last = pend;
 	}
 
 	last = 0;
 	for (i = 0; i < 4; i++) {
-		pend = __raw_readl(S3C2410_SUBSRCPND);
+		pend = __raw_readl(S3C2410_INTPND);
 
 		if (pend == 0 || pend == last)
 			break;
 
-		printk("irq: clearing subpending status %08x\n", (int)pend);
-		__raw_writel(pend, S3C2410_SUBSRCPND);
+		__raw_writel(pend, S3C2410_SRCPND);
+		__raw_writel(pend, S3C2410_INTPND);
+		printk("irq: clearing pending status %08x\n", (int)pend);
 		last = pend;
 	}