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/* linux/arch/arm/plat-s3c24xx/gpiolib.c
*
* Copyright (c) 2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* S3C24XX GPIOlib support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <mach/gpio-core.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <mach/regs-gpio.h>
static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
{
return -EINVAL;
}
static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long flags;
unsigned long dat;
unsigned long con;
local_irq_save(flags);
con = __raw_readl(base + 0x00);
dat = __raw_readl(base + 0x04);
dat &= ~(1 << offset);
if (value)
dat |= 1 << offset;
__raw_writel(dat, base + 0x04);
con &= ~(1 << offset);
__raw_writel(con, base + 0x00);
__raw_writel(dat, base + 0x04);
local_irq_restore(flags);
return 0;
}
static int s3c24xx_gpiolib_bankf_toirq(struct gpio_chip *chip, unsigned offset)
{
if (offset < 4)
return IRQ_EINT0 + offset;
if (offset < 8)
return IRQ_EINT4 + offset - 4;
return -EINVAL;
}
static int s3c24xx_gpiolib_bankg_toirq(struct gpio_chip *chip, unsigned offset)
{
return IRQ_EINT8 + offset;
}
struct s3c_gpio_chip s3c24xx_gpios[] = {
[0] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPA0),
.chip = {
.base = S3C2410_GPA0,
.owner = THIS_MODULE,
.label = "GPIOA",
.ngpio = 24,
.direction_input = s3c24xx_gpiolib_banka_input,
.direction_output = s3c24xx_gpiolib_banka_output,
},
},
[1] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPB0),
.chip = {
.base = S3C2410_GPB0,
.owner = THIS_MODULE,
.label = "GPIOB",
.ngpio = 16,
},
},
[2] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPC0),
.chip = {
.base = S3C2410_GPC0,
.owner = THIS_MODULE,
.label = "GPIOC",
.ngpio = 16,
},
},
[3] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPD0),
.chip = {
.base = S3C2410_GPD0,
.owner = THIS_MODULE,
.label = "GPIOD",
.ngpio = 16,
},
},
[4] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPE0),
.chip = {
.base = S3C2410_GPE0,
.label = "GPIOE",
.owner = THIS_MODULE,
.ngpio = 16,
},
},
[5] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPF0),
.chip = {
.base = S3C2410_GPF0,
.owner = THIS_MODULE,
.label = "GPIOF",
.ngpio = 8,
.to_irq = s3c24xx_gpiolib_bankf_toirq,
},
},
[6] = {
.base = S3C24XX_GPIO_BASE(S3C2410_GPG0),
.chip = {
.base = S3C2410_GPG0,
.owner = THIS_MODULE,
.label = "GPIOG",
.ngpio = 10,
.to_irq = s3c24xx_gpiolib_bankg_toirq,
},
},
};
static __init int s3c24xx_gpiolib_init(void)
{
struct s3c_gpio_chip *chip = s3c24xx_gpios;
int gpn;
for (gpn = 0; gpn < ARRAY_SIZE(s3c24xx_gpios); gpn++, chip++)
s3c_gpiolib_add(chip);
return 0;
}
arch_initcall(s3c24xx_gpiolib_init);
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