diff options
| author | Florian Fainelli <florian@openwrt.org> | 2012-12-06 22:40:02 +0000 |
|---|---|---|
| committer | Florian Fainelli <florian@openwrt.org> | 2012-12-06 22:40:02 +0000 |
| commit | 1ed763b8887616fbac8532895b764daf4d5d4f25 (patch) | |
| tree | 53a0365221f8e4ecf046b5e4d417d722499adce7 /target/linux | |
| parent | 47ccbaaa918b9b45bc7310a545e9dfa200a8f8b7 (diff) | |
| download | upstream-1ed763b8887616fbac8532895b764daf4d5d4f25.tar.gz upstream-1ed763b8887616fbac8532895b764daf4d5d4f25.tar.bz2 upstream-1ed763b8887616fbac8532895b764daf4d5d4f25.zip | |
cleanup and make interrupt code more robust
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 34552
Diffstat (limited to 'target/linux')
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 */ |