178 lines
3.6 KiB
C
178 lines
3.6 KiB
C
/* linux/arch/arm/plat-s3c24xx/gpiolib.c
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*
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* Copyright (c) 2008 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C24XX GPIOlib support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/sysdev.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#include <mach/gpio-core.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <plat/pm.h>
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#include <mach/regs-gpio.h>
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static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
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{
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return -EINVAL;
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}
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static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
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unsigned offset, int value)
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{
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struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
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void __iomem *base = ourchip->base;
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unsigned long flags;
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unsigned long dat;
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unsigned long con;
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local_irq_save(flags);
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con = __raw_readl(base + 0x00);
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dat = __raw_readl(base + 0x04);
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dat &= ~(1 << offset);
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if (value)
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dat |= 1 << offset;
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__raw_writel(dat, base + 0x04);
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con &= ~(1 << offset);
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__raw_writel(con, base + 0x00);
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__raw_writel(dat, base + 0x04);
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local_irq_restore(flags);
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return 0;
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}
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static int s3c24xx_gpiolib_bankf_toirq(struct gpio_chip *chip, unsigned offset)
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{
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if (offset < 4)
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return IRQ_EINT0 + offset;
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if (offset < 8)
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return IRQ_EINT4 + offset - 4;
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return -EINVAL;
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}
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static int s3c24xx_gpiolib_bankg_toirq(struct gpio_chip *chip, unsigned offset)
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{
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return IRQ_EINT8 + offset;
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}
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struct s3c_gpio_chip s3c24xx_gpios[] = {
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[0] = {
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.base = S3C2410_GPACON,
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.pm = __gpio_pm(&s3c_gpio_pm_1bit),
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.chip = {
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.base = S3C2410_GPA(0),
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.owner = THIS_MODULE,
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.label = "GPIOA",
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.ngpio = 24,
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.direction_input = s3c24xx_gpiolib_banka_input,
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.direction_output = s3c24xx_gpiolib_banka_output,
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},
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},
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[1] = {
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.base = S3C2410_GPBCON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPB(0),
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.owner = THIS_MODULE,
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.label = "GPIOB",
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.ngpio = 16,
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},
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},
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[2] = {
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.base = S3C2410_GPCCON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPC(0),
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.owner = THIS_MODULE,
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.label = "GPIOC",
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.ngpio = 16,
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},
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},
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[3] = {
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.base = S3C2410_GPDCON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPD(0),
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.owner = THIS_MODULE,
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.label = "GPIOD",
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.ngpio = 16,
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},
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},
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[4] = {
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.base = S3C2410_GPECON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPE(0),
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.label = "GPIOE",
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.owner = THIS_MODULE,
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.ngpio = 16,
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},
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},
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[5] = {
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.base = S3C2410_GPFCON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPF(0),
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.owner = THIS_MODULE,
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.label = "GPIOF",
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.ngpio = 8,
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.to_irq = s3c24xx_gpiolib_bankf_toirq,
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},
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},
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[6] = {
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.base = S3C2410_GPGCON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPG(0),
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.owner = THIS_MODULE,
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.label = "GPIOG",
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.ngpio = 16,
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.to_irq = s3c24xx_gpiolib_bankg_toirq,
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},
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}, {
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.base = S3C2410_GPHCON,
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.pm = __gpio_pm(&s3c_gpio_pm_2bit),
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.chip = {
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.base = S3C2410_GPH(0),
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.owner = THIS_MODULE,
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.label = "GPIOH",
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.ngpio = 11,
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},
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},
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};
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static __init int s3c24xx_gpiolib_init(void)
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{
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struct s3c_gpio_chip *chip = s3c24xx_gpios;
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int gpn;
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for (gpn = 0; gpn < ARRAY_SIZE(s3c24xx_gpios); gpn++, chip++)
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s3c_gpiolib_add(chip);
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return 0;
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}
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core_initcall(s3c24xx_gpiolib_init);
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