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Diffstat (limited to 'target/linux/adm8668/files/arch/mips/adm8668/irq.c')
-rw-r--r--target/linux/adm8668/files/arch/mips/adm8668/irq.c47
1 files changed, 38 insertions, 9 deletions
diff --git a/target/linux/adm8668/files/arch/mips/adm8668/irq.c b/target/linux/adm8668/files/arch/mips/adm8668/irq.c
index 9fa9e675e4..62b7d2dc32 100644
--- a/target/linux/adm8668/files/arch/mips/adm8668/irq.c
+++ b/target/linux/adm8668/files/arch/mips/adm8668/irq.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
+ * Copyright (C) 2012 Florian Fainelli <florian@openwrt.org>
*
* 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
@@ -20,15 +21,38 @@
#include <asm/irq.h>
#include <adm8668.h>
+/* interrupt controller */
+#define IRQ_STATUS_REG 0x00 /* Read */
+#define IRQ_ENABLE_REG 0x08 /* Read/Write */
+#define IRQ_DISABLE_REG 0x0C /* Write */
+
+#define IRQ_MASK 0xffff
+
+static inline void intc_write_reg(u32 val, unsigned int reg)
+{
+ void __iomem *base = (void __iomem *)KSEG1ADDR(ADM8668_INTC_BASE);
+
+ __raw_writel(val, base + reg);
+}
+
+static inline u32 intc_read_reg(unsigned int reg)
+{
+ void __iomem *base = (void __iomem *)KSEG1ADDR(ADM8668_INTC_BASE);
+
+ return __raw_readl(base + reg);
+}
+
static void adm8668_irq_cascade(void)
{
- int i;
- unsigned long intsrc;
+ int irq;
+ u32 intsrc;
- intsrc = ADM8668_INTC_REG(IRQ_STATUS_REG) & IRQ_MASK;
- for (i = 0; intsrc; intsrc >>= 1, i++)
- if (intsrc & 0x1)
- do_IRQ(i);
+ intsrc = intc_read_reg(IRQ_STATUS_REG) & IRQ_MASK;
+ if (intsrc) {
+ irq = fls(intsrc) - 1;
+ do_IRQ(irq);
+ } else
+ spurious_interrupt();
}
/*
@@ -43,8 +67,10 @@ void plat_irq_dispatch(void)
/* timer interrupt, that we renumbered */
if (pending & STATUSF_IP7)
do_IRQ(MIPS_CPU_IRQ_BASE + 7);
- if (pending & STATUSF_IP2)
+ else if (pending & STATUSF_IP2)
adm8668_irq_cascade();
+ else
+ spurious_interrupt();
}
/*
@@ -52,13 +78,13 @@ void plat_irq_dispatch(void)
*/
static void enable_adm8668_irq(struct irq_data *d)
{
- ADM8668_INTC_REG(IRQ_ENABLE_REG) = (1 << d->irq);
+ intc_write_reg((1 << d->irq), IRQ_ENABLE_REG);
}
static void ack_adm8668_irq(struct irq_data *d)
{
- ADM8668_INTC_REG(IRQ_DISABLE_REG) = (1 << d->irq);
+ intc_write_reg((1 << d->irq), IRQ_DISABLE_REG);
}
/*
@@ -79,6 +105,9 @@ static void __init init_adm8668_irqs(void)
{
int i;
+ /* disable all interrupts for the moment */
+ intc_write_reg(IRQ_MASK, IRQ_DISABLE_REG);
+
for (i = 0; i <= INT_LVL_MAX; i++)
irq_set_chip_and_handler(i, &adm8668_irq_type,
handle_level_irq);