diff options
Diffstat (limited to 'target/linux/adm8668/files/arch/mips/adm8668/irq.c')
-rw-r--r-- | target/linux/adm8668/files/arch/mips/adm8668/irq.c | 47 |
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); |