diff options
Diffstat (limited to 'arch/arm/plat-s3c64xx/irq.c')
-rw-r--r-- | arch/arm/plat-s3c64xx/irq.c | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/arch/arm/plat-s3c64xx/irq.c b/arch/arm/plat-s3c64xx/irq.c index 308dc41..1e6fa5c 100644 --- a/arch/arm/plat-s3c64xx/irq.c +++ b/arch/arm/plat-s3c64xx/irq.c @@ -14,21 +14,106 @@ #include <linux/kernel.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/io.h> #include <asm/hardware/vic.h> -#include <asm/irq.h> #include <mach/map.h> +#include <plat/regs-timer.h> #include <plat/cpu.h> +/* Timer interrupt handling */ + +static void s3c_irq_demux_timer(unsigned int base_irq, unsigned int sub_irq) +{ + generic_handle_irq(sub_irq); +} + +static void s3c_irq_demux_timer0(unsigned int irq, struct irq_desc *desc) +{ + s3c_irq_demux_timer(irq, IRQ_TIMER0); +} + +static void s3c_irq_demux_timer1(unsigned int irq, struct irq_desc *desc) +{ + s3c_irq_demux_timer(irq, IRQ_TIMER1); +} + +static void s3c_irq_demux_timer2(unsigned int irq, struct irq_desc *desc) +{ + s3c_irq_demux_timer(irq, IRQ_TIMER2); +} + +static void s3c_irq_demux_timer3(unsigned int irq, struct irq_desc *desc) +{ + s3c_irq_demux_timer(irq, IRQ_TIMER3); +} + +static void s3c_irq_demux_timer4(unsigned int irq, struct irq_desc *desc) +{ + s3c_irq_demux_timer(irq, IRQ_TIMER4); +} + +/* We assume the IRQ_TIMER0..IRQ_TIMER4 range is continuous. */ + +static void s3c_irq_timer_mask(unsigned int irq) +{ + u32 reg = __raw_readl(S3C64XX_TINT_CSTAT); + + reg &= 0x1f; /* mask out pending interrupts */ + reg &= ~(1 << (irq - IRQ_TIMER0)); + __raw_writel(reg, S3C64XX_TINT_CSTAT); +} + +static void s3c_irq_timer_unmask(unsigned int irq) +{ + u32 reg = __raw_readl(S3C64XX_TINT_CSTAT); + + reg &= 0x1f; /* mask out pending interrupts */ + reg |= 1 << (irq - IRQ_TIMER0); + __raw_writel(reg, S3C64XX_TINT_CSTAT); +} + +static void s3c_irq_timer_ack(unsigned int irq) +{ + u32 reg = __raw_readl(S3C64XX_TINT_CSTAT); + + reg &= 0x1f; + reg |= (1 << 5) << (irq - IRQ_TIMER0); + __raw_writel(reg, S3C64XX_TINT_CSTAT); +} + +static struct irq_chip s3c_irq_timer = { + .name = "s3c-timer", + .mask = s3c_irq_timer_mask, + .unmask = s3c_irq_timer_unmask, + .ack = s3c_irq_timer_ack, +}; + void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid) { + int irq; + printk(KERN_INFO "%s: initialising interrupts\n", __func__); /* initialise the pair of VICs */ vic_init(S3C_VA_VIC0, S3C_VIC0_BASE, vic0_valid); vic_init(S3C_VA_VIC1, S3C_VIC1_BASE, vic1_valid); + + /* add the timer sub-irqs */ + + set_irq_chained_handler(IRQ_TIMER0_VIC, s3c_irq_demux_timer0); + set_irq_chained_handler(IRQ_TIMER1_VIC, s3c_irq_demux_timer1); + set_irq_chained_handler(IRQ_TIMER2_VIC, s3c_irq_demux_timer2); + set_irq_chained_handler(IRQ_TIMER3_VIC, s3c_irq_demux_timer3); + set_irq_chained_handler(IRQ_TIMER4_VIC, s3c_irq_demux_timer4); + + for (irq = IRQ_TIMER0; irq <= IRQ_TIMER4; irq++) { + set_irq_chip(irq, &s3c_irq_timer); + set_irq_handler(irq, handle_level_irq); + set_irq_flags(irq, IRQF_VALID); + } } |