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linux-next/arch/arm/mach-exynos4/gpiolib.c
Marek Szyprowski 721bbd4a06 ARM: EXYNOS4: Add support for gpio interrupts 
This patch adds support for gpio interrupts on Samsung EXYNOS4 platform.
Common s5p-gpioint.c code is used for handling gpio interrupts. Each gpio
line that needs gpio interrupt support must be later registered with
s5p_register_gpio_interrupt() function.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-15 21:17:43 +09:00

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/* linux/arch/arm/mach-exynos4/gpiolib.c
*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* EXYNOS4 - GPIOlib support
*
* 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/irq.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <mach/map.h>
#include <plat/gpio-core.h>
#include <plat/gpio-cfg.h>
#include <plat/gpio-cfg-helpers.h>
static struct s3c_gpio_cfg gpio_cfg = {
.set_config = s3c_gpio_setcfg_s3c64xx_4bit,
.set_pull = s3c_gpio_setpull_updown,
.get_pull = s3c_gpio_getpull_updown,
};
static struct s3c_gpio_cfg gpio_cfg_noint = {
.set_config = s3c_gpio_setcfg_s3c64xx_4bit,
.set_pull = s3c_gpio_setpull_updown,
.get_pull = s3c_gpio_getpull_updown,
};
/*
* Following are the gpio banks in v310.
*
* The 'config' member when left to NULL, is initialized to the default
* structure gpio_cfg in the init function below.
*
* The 'base' member is also initialized in the init function below.
* Note: The initialization of 'base' member of s3c_gpio_chip structure
* uses the above macro and depends on the banks being listed in order here.
*/
static struct s3c_gpio_chip exynos4_gpio_part1_4bit[] = {
{
.chip = {
.base = EXYNOS4_GPA0(0),
.ngpio = EXYNOS4_GPIO_A0_NR,
.label = "GPA0",
},
}, {
.chip = {
.base = EXYNOS4_GPA1(0),
.ngpio = EXYNOS4_GPIO_A1_NR,
.label = "GPA1",
},
}, {
.chip = {
.base = EXYNOS4_GPB(0),
.ngpio = EXYNOS4_GPIO_B_NR,
.label = "GPB",
},
}, {
.chip = {
.base = EXYNOS4_GPC0(0),
.ngpio = EXYNOS4_GPIO_C0_NR,
.label = "GPC0",
},
}, {
.chip = {
.base = EXYNOS4_GPC1(0),
.ngpio = EXYNOS4_GPIO_C1_NR,
.label = "GPC1",
},
}, {
.chip = {
.base = EXYNOS4_GPD0(0),
.ngpio = EXYNOS4_GPIO_D0_NR,
.label = "GPD0",
},
}, {
.chip = {
.base = EXYNOS4_GPD1(0),
.ngpio = EXYNOS4_GPIO_D1_NR,
.label = "GPD1",
},
}, {
.chip = {
.base = EXYNOS4_GPE0(0),
.ngpio = EXYNOS4_GPIO_E0_NR,
.label = "GPE0",
},
}, {
.chip = {
.base = EXYNOS4_GPE1(0),
.ngpio = EXYNOS4_GPIO_E1_NR,
.label = "GPE1",
},
}, {
.chip = {
.base = EXYNOS4_GPE2(0),
.ngpio = EXYNOS4_GPIO_E2_NR,
.label = "GPE2",
},
}, {
.chip = {
.base = EXYNOS4_GPE3(0),
.ngpio = EXYNOS4_GPIO_E3_NR,
.label = "GPE3",
},
}, {
.chip = {
.base = EXYNOS4_GPE4(0),
.ngpio = EXYNOS4_GPIO_E4_NR,
.label = "GPE4",
},
}, {
.chip = {
.base = EXYNOS4_GPF0(0),
.ngpio = EXYNOS4_GPIO_F0_NR,
.label = "GPF0",
},
}, {
.chip = {
.base = EXYNOS4_GPF1(0),
.ngpio = EXYNOS4_GPIO_F1_NR,
.label = "GPF1",
},
}, {
.chip = {
.base = EXYNOS4_GPF2(0),
.ngpio = EXYNOS4_GPIO_F2_NR,
.label = "GPF2",
},
}, {
.chip = {
.base = EXYNOS4_GPF3(0),
.ngpio = EXYNOS4_GPIO_F3_NR,
.label = "GPF3",
},
},
};
static struct s3c_gpio_chip exynos4_gpio_part2_4bit[] = {
{
.chip = {
.base = EXYNOS4_GPJ0(0),
.ngpio = EXYNOS4_GPIO_J0_NR,
.label = "GPJ0",
},
}, {
.chip = {
.base = EXYNOS4_GPJ1(0),
.ngpio = EXYNOS4_GPIO_J1_NR,
.label = "GPJ1",
},
}, {
.chip = {
.base = EXYNOS4_GPK0(0),
.ngpio = EXYNOS4_GPIO_K0_NR,
.label = "GPK0",
},
}, {
.chip = {
.base = EXYNOS4_GPK1(0),
.ngpio = EXYNOS4_GPIO_K1_NR,
.label = "GPK1",
},
}, {
.chip = {
.base = EXYNOS4_GPK2(0),
.ngpio = EXYNOS4_GPIO_K2_NR,
.label = "GPK2",
},
}, {
.chip = {
.base = EXYNOS4_GPK3(0),
.ngpio = EXYNOS4_GPIO_K3_NR,
.label = "GPK3",
},
}, {
.chip = {
.base = EXYNOS4_GPL0(0),
.ngpio = EXYNOS4_GPIO_L0_NR,
.label = "GPL0",
},
}, {
.chip = {
.base = EXYNOS4_GPL1(0),
.ngpio = EXYNOS4_GPIO_L1_NR,
.label = "GPL1",
},
}, {
.chip = {
.base = EXYNOS4_GPL2(0),
.ngpio = EXYNOS4_GPIO_L2_NR,
.label = "GPL2",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY0(0),
.ngpio = EXYNOS4_GPIO_Y0_NR,
.label = "GPY0",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY1(0),
.ngpio = EXYNOS4_GPIO_Y1_NR,
.label = "GPY1",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY2(0),
.ngpio = EXYNOS4_GPIO_Y2_NR,
.label = "GPY2",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY3(0),
.ngpio = EXYNOS4_GPIO_Y3_NR,
.label = "GPY3",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY4(0),
.ngpio = EXYNOS4_GPIO_Y4_NR,
.label = "GPY4",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY5(0),
.ngpio = EXYNOS4_GPIO_Y5_NR,
.label = "GPY5",
},
}, {
.config = &gpio_cfg_noint,
.chip = {
.base = EXYNOS4_GPY6(0),
.ngpio = EXYNOS4_GPIO_Y6_NR,
.label = "GPY6",
},
}, {
.base = (S5P_VA_GPIO2 + 0xC00),
.config = &gpio_cfg_noint,
.irq_base = IRQ_EINT(0),
.chip = {
.base = EXYNOS4_GPX0(0),
.ngpio = EXYNOS4_GPIO_X0_NR,
.label = "GPX0",
.to_irq = samsung_gpiolib_to_irq,
},
}, {
.base = (S5P_VA_GPIO2 + 0xC20),
.config = &gpio_cfg_noint,
.irq_base = IRQ_EINT(8),
.chip = {
.base = EXYNOS4_GPX1(0),
.ngpio = EXYNOS4_GPIO_X1_NR,
.label = "GPX1",
.to_irq = samsung_gpiolib_to_irq,
},
}, {
.base = (S5P_VA_GPIO2 + 0xC40),
.config = &gpio_cfg_noint,
.irq_base = IRQ_EINT(16),
.chip = {
.base = EXYNOS4_GPX2(0),
.ngpio = EXYNOS4_GPIO_X2_NR,
.label = "GPX2",
.to_irq = samsung_gpiolib_to_irq,
},
}, {
.base = (S5P_VA_GPIO2 + 0xC60),
.config = &gpio_cfg_noint,
.irq_base = IRQ_EINT(24),
.chip = {
.base = EXYNOS4_GPX3(0),
.ngpio = EXYNOS4_GPIO_X3_NR,
.label = "GPX3",
.to_irq = samsung_gpiolib_to_irq,
},
},
};
static struct s3c_gpio_chip exynos4_gpio_part3_4bit[] = {
{
.chip = {
.base = EXYNOS4_GPZ(0),
.ngpio = EXYNOS4_GPIO_Z_NR,
.label = "GPZ",
},
},
};
static __init int exynos4_gpiolib_init(void)
{
struct s3c_gpio_chip *chip;
int i;
int group = 0;
int nr_chips;
/* GPIO part 1 */
chip = exynos4_gpio_part1_4bit;
nr_chips = ARRAY_SIZE(exynos4_gpio_part1_4bit);
for (i = 0; i < nr_chips; i++, chip++) {
if (chip->config == NULL) {
chip->config = &gpio_cfg;
/* Assign the GPIO interrupt group */
chip->group = group++;
}
if (chip->base == NULL)
chip->base = S5P_VA_GPIO1 + (i) * 0x20;
}
samsung_gpiolib_add_4bit_chips(exynos4_gpio_part1_4bit, nr_chips);
/* GPIO part 2 */
chip = exynos4_gpio_part2_4bit;
nr_chips = ARRAY_SIZE(exynos4_gpio_part2_4bit);
for (i = 0; i < nr_chips; i++, chip++) {
if (chip->config == NULL) {
chip->config = &gpio_cfg;
/* Assign the GPIO interrupt group */
chip->group = group++;
}
if (chip->base == NULL)
chip->base = S5P_VA_GPIO2 + (i) * 0x20;
}
samsung_gpiolib_add_4bit_chips(exynos4_gpio_part2_4bit, nr_chips);
/* GPIO part 3 */
chip = exynos4_gpio_part3_4bit;
nr_chips = ARRAY_SIZE(exynos4_gpio_part3_4bit);
for (i = 0; i < nr_chips; i++, chip++) {
if (chip->config == NULL) {
chip->config = &gpio_cfg;
/* Assign the GPIO interrupt group */
chip->group = group++;
}
if (chip->base == NULL)
chip->base = S5P_VA_GPIO3 + (i) * 0x20;
}
samsung_gpiolib_add_4bit_chips(exynos4_gpio_part3_4bit, nr_chips);
s5p_register_gpioint_bank(IRQ_GPIO_XA, 0, IRQ_GPIO1_NR_GROUPS);
s5p_register_gpioint_bank(IRQ_GPIO_XB, IRQ_GPIO1_NR_GROUPS, IRQ_GPIO2_NR_GROUPS);
return 0;
}
core_initcall(exynos4_gpiolib_init);
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