diff options
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-kirkwood/include/mach/gpio.h | 38 | ||||
| -rw-r--r-- | arch/arm/mach-kirkwood/include/mach/irqs.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-kirkwood/include/mach/kirkwood.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-kirkwood/irq.c | 35 |
5 files changed, 75 insertions, 6 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f1a3b10cfa9..d840a64c6ce 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -386,6 +386,7 @@ config ARCH_KIRKWOOD bool "Marvell Kirkwood" select CPU_FEROCEON select PCI + select GENERIC_GPIO select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION diff --git a/arch/arm/mach-kirkwood/include/mach/gpio.h b/arch/arm/mach-kirkwood/include/mach/gpio.h new file mode 100644 index 00000000000..81b335eb62e --- /dev/null +++ b/arch/arm/mach-kirkwood/include/mach/gpio.h @@ -0,0 +1,38 @@ +/* + * arch/asm-arm/mach-kirkwood/include/mach/gpio.h + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __ASM_ARCH_GPIO_H +#define __ASM_ARCH_GPIO_H + +#include <mach/irqs.h> +#include <plat/gpio.h> +#include <asm-generic/gpio.h> /* cansleep wrappers */ + +#define GPIO_MAX 50 +#define GPIO_OFF(pin) (((pin) >> 5) ? 0x0140 : 0x0100) +#define GPIO_OUT(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x00) +#define GPIO_IO_CONF(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x04) +#define GPIO_BLINK_EN(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x08) +#define GPIO_IN_POL(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x0c) +#define GPIO_DATA_IN(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x10) +#define GPIO_EDGE_CAUSE(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x14) +#define GPIO_EDGE_MASK(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x18) +#define GPIO_LEVEL_MASK(pin) (DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x1c) + +static inline int gpio_to_irq(int pin) +{ + return pin + IRQ_KIRKWOOD_GPIO_START; +} + +static inline int irq_to_gpio(int irq) +{ + return irq - IRQ_KIRKWOOD_GPIO_START; +} + + +#endif diff --git a/arch/arm/mach-kirkwood/include/mach/irqs.h b/arch/arm/mach-kirkwood/include/mach/irqs.h index 3a964bb1497..f00a0a45a67 100644 --- a/arch/arm/mach-kirkwood/include/mach/irqs.h +++ b/arch/arm/mach-kirkwood/include/mach/irqs.h @@ -11,8 +11,6 @@ #ifndef __ASM_ARCH_IRQS_H #define __ASM_ARCH_IRQS_H -#include "kirkwood.h" /* need GPIO_MAX */ - /* * Low Interrupt Controller */ @@ -57,7 +55,7 @@ * KIRKWOOD General Purpose Pins */ #define IRQ_KIRKWOOD_GPIO_START 64 -#define NR_GPIO_IRQS GPIO_MAX +#define NR_GPIO_IRQS 50 #define NR_IRQS (IRQ_KIRKWOOD_GPIO_START + NR_GPIO_IRQS) diff --git a/arch/arm/mach-kirkwood/include/mach/kirkwood.h b/arch/arm/mach-kirkwood/include/mach/kirkwood.h index eae42406fd8..ada480c0e19 100644 --- a/arch/arm/mach-kirkwood/include/mach/kirkwood.h +++ b/arch/arm/mach-kirkwood/include/mach/kirkwood.h @@ -117,7 +117,4 @@ #define SATA_PHYS_BASE (KIRKWOOD_REGS_PHYS_BASE | 0x80000) -#define GPIO_MAX 50 - - #endif diff --git a/arch/arm/mach-kirkwood/irq.c b/arch/arm/mach-kirkwood/irq.c index 5790643ffe0..efb86b70027 100644 --- a/arch/arm/mach-kirkwood/irq.c +++ b/arch/arm/mach-kirkwood/irq.c @@ -13,10 +13,45 @@ #include <linux/irq.h> #include <linux/io.h> #include <plat/irq.h> +#include <asm/gpio.h> #include "common.h" +static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) +{ + BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7); + BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23); + + orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3); +} + void __init kirkwood_init_irq(void) { + int i; + orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF)); orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF)); + + /* + * Mask and clear GPIO IRQ interrupts. + */ + writel(0, GPIO_LEVEL_MASK(0)); + writel(0, GPIO_EDGE_MASK(0)); + writel(0, GPIO_EDGE_CAUSE(0)); + writel(0, GPIO_LEVEL_MASK(32)); + writel(0, GPIO_EDGE_MASK(32)); + writel(0, GPIO_EDGE_CAUSE(32)); + + for (i = IRQ_KIRKWOOD_GPIO_START; i < NR_IRQS; i++) { + set_irq_chip(i, &orion_gpio_irq_level_chip); + set_irq_handler(i, handle_level_irq); + irq_desc[i].status |= IRQ_LEVEL; + set_irq_flags(i, IRQF_VALID); + } + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler); + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler); + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler); + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler); + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler); + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler); + set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, gpio_irq_handler); } |