diff options
| -rw-r--r-- | arch/arm/plat-s3c64xx/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/plat-s3c64xx/irq.c | 90 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/Kconfig | 7 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/irq-vic-timer.h | 13 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/irq-vic-timer.c | 86 |
6 files changed, 116 insertions, 83 deletions
diff --git a/arch/arm/plat-s3c64xx/Kconfig b/arch/arm/plat-s3c64xx/Kconfig index bec12242706..02d716fb157 100644 --- a/arch/arm/plat-s3c64xx/Kconfig +++ b/arch/arm/plat-s3c64xx/Kconfig @@ -14,6 +14,7 @@ config PLAT_S3C64XX select NO_IOPORT select ARCH_REQUIRE_GPIOLIB select SAMSUNG_CLKSRC + select SAMSUNG_IRQ_VIC_TIMER select S3C_GPIO_TRACK select S3C_GPIO_PULL_UPDOWN select S3C_GPIO_CFG_S3C24XX diff --git a/arch/arm/plat-s3c64xx/irq.c b/arch/arm/plat-s3c64xx/irq.c index 8dc5b6da978..8b69bca0587 100644 --- a/arch/arm/plat-s3c64xx/irq.c +++ b/arch/arm/plat-s3c64xx/irq.c @@ -21,78 +21,10 @@ #include <asm/hardware/vic.h> #include <mach/map.h> +#include <plat/irq-vic-timer.h> #include <plat/regs-serial.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, -}; - struct uart_irq { void __iomem *regs; unsigned int base_irq; @@ -227,7 +159,7 @@ static void __init s3c64xx_uart_irq(struct uart_irq *uirq) void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid) { - int uart, irq; + int uart; printk(KERN_DEBUG "%s: initialising interrupts\n", __func__); @@ -237,20 +169,12 @@ void __init s3c64xx_init_irq(u32 vic0_valid, u32 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); - } + s3c_init_vic_timer_irq(IRQ_TIMER0_VIC, IRQ_TIMER0); + s3c_init_vic_timer_irq(IRQ_TIMER1_VIC, IRQ_TIMER1); + s3c_init_vic_timer_irq(IRQ_TIMER2_VIC, IRQ_TIMER2); + s3c_init_vic_timer_irq(IRQ_TIMER3_VIC, IRQ_TIMER3); + s3c_init_vic_timer_irq(IRQ_TIMER4_VIC, IRQ_TIMER4); for (uart = 0; uart < ARRAY_SIZE(uart_irqs); uart++) s3c64xx_uart_irq(&uart_irqs[uart]); } - - diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index 9e7daf29b86..cedecd87d89 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -19,6 +19,13 @@ config SAMSUNG_CLKSRC Select the clock code for the clksrc implementation used by newer systems such as the S3C64XX. +# options for IRQ support + +config SAMSUNG_IRQ_VIC_TIMER + bool + help + Internal configuration to build the VIC timer interrupt code. + # options for gpio configuration support config S3C_GPIO_CFG_S3C24XX diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index 2c0143713ea..aa048c7337d 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -17,6 +17,8 @@ obj-y += gpio-config.o obj-$(CONFIG_SAMSUNG_CLKSRC) += clock-clksrc.o +obj-$(CONFIG_SAMSUNG_IRQ_VIC_TIMER) += irq-vic-timer.o + # devices obj-$(CONFIG_S3C_DEV_HSMMC) += dev-hsmmc.o diff --git a/arch/arm/plat-samsung/include/plat/irq-vic-timer.h b/arch/arm/plat-samsung/include/plat/irq-vic-timer.h new file mode 100644 index 00000000000..a90b53431b5 --- /dev/null +++ b/arch/arm/plat-samsung/include/plat/irq-vic-timer.h @@ -0,0 +1,13 @@ +/* arch/arm/plat-samsung/include/plat/irq-vic-timer.h + * + * Copyright (c) 2010 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * Header file for Samsung SoC IRQ VIC timer + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +extern void s3c_init_vic_timer_irq(unsigned int vic, unsigned int timer); diff --git a/arch/arm/plat-samsung/irq-vic-timer.c b/arch/arm/plat-samsung/irq-vic-timer.c new file mode 100644 index 00000000000..0270519fcab --- /dev/null +++ b/arch/arm/plat-samsung/irq-vic-timer.c @@ -0,0 +1,86 @@ +/* arch/arm/plat-samsung/irq-vic-timer.c + * originally part of arch/arm/plat-s3c64xx/irq.c + * + * Copyright 2008 Openmoko, Inc. + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C64XX - Interrupt handling + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/io.h> + +#include <mach/map.h> +#include <plat/irq-vic-timer.h> +#include <plat/regs-timer.h> + +static void s3c_irq_demux_vic_timer(unsigned int irq, struct irq_desc *desc) +{ + generic_handle_irq((int)desc->handler_data); +} + +/* 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, +}; + +/** + * s3c_init_vic_timer_irq() - initialise timer irq chanined off VIC.\ + * @parent_irq: The parent IRQ on the VIC for the timer. + * @timer_irq: The IRQ to be used for the timer. + * + * Register the necessary IRQ chaining and support for the timer IRQs + * chained of the VIC. + */ +void __init s3c_init_vic_timer_irq(unsigned int parent_irq, + unsigned int timer_irq) +{ + struct irq_desc *desc = irq_to_desc(parent_irq); + + set_irq_chained_handler(parent_irq, s3c_irq_demux_vic_timer); + + set_irq_chip(timer_irq, &s3c_irq_timer); + set_irq_handler(timer_irq, handle_level_irq); + set_irq_flags(timer_irq, IRQF_VALID); + + desc->handler_data = (void *)timer_irq; +} |