| /* linux/arch/arm/plat-s3c24xx/gpio.c |
| * |
| * Copyright (c) 2004-2005 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * S3C24XX GPIO 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, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #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 <mach/hardware.h> |
| #include <mach/gpio-fns.h> |
| #include <asm/irq.h> |
| |
| #include <mach/regs-gpio.h> |
| |
| void s3c2410_gpio_pullup(unsigned int pin, unsigned int to) |
| { |
| void __iomem *base = S3C24XX_GPIO_BASE(pin); |
| unsigned long offs = S3C2410_GPIO_OFFSET(pin); |
| unsigned long flags; |
| unsigned long up; |
| |
| if (pin < S3C2410_GPIO_BANKB) |
| return; |
| |
| local_irq_save(flags); |
| |
| up = __raw_readl(base + 0x08); |
| up &= ~(1L << offs); |
| up |= to << offs; |
| __raw_writel(up, base + 0x08); |
| |
| local_irq_restore(flags); |
| } |
| |
| EXPORT_SYMBOL(s3c2410_gpio_pullup); |
| |
| |
| void s3c2410_gpio_setpin(unsigned int pin, unsigned int to) |
| { |
| void __iomem *base = S3C24XX_GPIO_BASE(pin); |
| unsigned long offs = S3C2410_GPIO_OFFSET(pin); |
| unsigned long flags; |
| unsigned long dat; |
| |
| local_irq_save(flags); |
| |
| dat = __raw_readl(base + 0x04); |
| dat &= ~(1 << offs); |
| dat |= to << offs; |
| __raw_writel(dat, base + 0x04); |
| |
| local_irq_restore(flags); |
| } |
| |
| EXPORT_SYMBOL(s3c2410_gpio_setpin); |
| |
| unsigned int s3c2410_gpio_getpin(unsigned int pin) |
| { |
| void __iomem *base = S3C24XX_GPIO_BASE(pin); |
| unsigned long offs = S3C2410_GPIO_OFFSET(pin); |
| |
| return __raw_readl(base + 0x04) & (1<< offs); |
| } |
| |
| EXPORT_SYMBOL(s3c2410_gpio_getpin); |
| |
| unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change) |
| { |
| unsigned long flags; |
| unsigned long misccr; |
| |
| local_irq_save(flags); |
| misccr = __raw_readl(S3C24XX_MISCCR); |
| misccr &= ~clear; |
| misccr ^= change; |
| __raw_writel(misccr, S3C24XX_MISCCR); |
| local_irq_restore(flags); |
| |
| return misccr; |
| } |
| |
| EXPORT_SYMBOL(s3c2410_modify_misccr); |