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authorFlorian Fainelli <florian@openwrt.org>2012-12-06 22:40:02 +0000
committerFlorian Fainelli <florian@openwrt.org>2012-12-06 22:40:02 +0000
commit1ed763b8887616fbac8532895b764daf4d5d4f25 (patch)
tree53a0365221f8e4ecf046b5e4d417d722499adce7 /target/linux/adm8668/files
parent47ccbaaa918b9b45bc7310a545e9dfa200a8f8b7 (diff)
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cleanup and make interrupt code more robust
Signed-off-by: Florian Fainelli <florian@openwrt.org> SVN-Revision: 34552
Diffstat (limited to 'target/linux/adm8668/files')
-rw-r--r--target/linux/adm8668/files/arch/mips/adm8668/irq.c47
-rw-r--r--target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/adm8668.h7
-rw-r--r--target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/irq.h4
3 files changed, 39 insertions, 19 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);
diff --git a/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/adm8668.h b/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/adm8668.h
index bb4466c522..250447bbf3 100644
--- a/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/adm8668.h
+++ b/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/adm8668.h
@@ -32,11 +32,6 @@
/** onboard uart **/
#define ADM8668_UARTCLK_FREQ 62500000
-/* interrupt controller */
-#define IRQ_STATUS_REG 0x00 /* Read */
-#define IRQ_ENABLE_REG 0x08 /* Read/Write */
-#define IRQ_DISABLE_REG 0x0C /* Write */
-
/* interrupt levels */
#define INT_LVL_SWI 1
#define INT_LVL_COMMS_RX 2
@@ -56,8 +51,6 @@
#define INT_LVL_MAX INT_LVL_USB
/* register access macros */
-#define ADM8668_INTC_REG(_reg) \
- (*((volatile unsigned long *)(KSEG1ADDR(ADM8668_INTC_BASE + (_reg)))))
#define ADM8668_LAN_REG(_reg) \
(*((volatile unsigned int *)(KSEG1ADDR(ADM8668_LAN_BASE + (_reg)))))
#define ADM8668_WAN_REG(_reg) \
diff --git a/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/irq.h b/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/irq.h
index 1341309f2b..ea859f03af 100644
--- a/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/irq.h
+++ b/target/linux/adm8668/files/arch/mips/include/asm/mach-adm8668/irq.h
@@ -8,9 +8,7 @@
#ifndef __ASM_MACH_ADM8668_IRQ_H
#define __ASM_MACH_ADM8668_IRQ_H
-#define NR_IRQS 32
+#define NR_IRQS 32
#define MIPS_CPU_IRQ_BASE 16
-#define IRQ_MASK 0xffff
-
#endif /* __ASM_MACH_ADM8668_IRQ_H */