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- /* 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 <asm/hardware.h>
- #include <asm/irq.h>
- #include <asm/io.h>
- #include <asm/arch/regs-gpio.h>
- void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function)
- {
- void __iomem *base = S3C24XX_GPIO_BASE(pin);
- unsigned long mask;
- unsigned long con;
- unsigned long flags;
- if (pin < S3C2410_GPIO_BANKB) {
- mask = 1 << S3C2410_GPIO_OFFSET(pin);
- } else {
- mask = 3 << S3C2410_GPIO_OFFSET(pin)*2;
- }
- switch (function) {
- case S3C2410_GPIO_LEAVE:
- mask = 0;
- function = 0;
- break;
- case S3C2410_GPIO_INPUT:
- case S3C2410_GPIO_OUTPUT:
- case S3C2410_GPIO_SFN2:
- case S3C2410_GPIO_SFN3:
- if (pin < S3C2410_GPIO_BANKB) {
- function -= 1;
- function &= 1;
- function <<= S3C2410_GPIO_OFFSET(pin);
- } else {
- function &= 3;
- function <<= S3C2410_GPIO_OFFSET(pin)*2;
- }
- }
- /* modify the specified register wwith IRQs off */
- local_irq_save(flags);
- con = __raw_readl(base + 0x00);
- con &= ~mask;
- con |= function;
- __raw_writel(con, base + 0x00);
- local_irq_restore(flags);
- }
- EXPORT_SYMBOL(s3c2410_gpio_cfgpin);
- unsigned int s3c2410_gpio_getcfg(unsigned int pin)
- {
- void __iomem *base = S3C24XX_GPIO_BASE(pin);
- unsigned long val = __raw_readl(base);
- if (pin < S3C2410_GPIO_BANKB) {
- val >>= S3C2410_GPIO_OFFSET(pin);
- val &= 1;
- val += 1;
- } else {
- val >>= S3C2410_GPIO_OFFSET(pin)*2;
- val &= 3;
- }
- return val | S3C2410_GPIO_INPUT;
- }
- EXPORT_SYMBOL(s3c2410_gpio_getcfg);
- #if defined(CONFIG_CPU_S3C2443) || defined(CONFIG_CPU_S3C2450) || defined(CONFIG_CPU_S3C2416)
- void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
- {
- void __iomem *base = S3C24XX_GPIO_BASE(pin);
- unsigned long offs = S3C2410_GPIO_OFFSET(pin)*2;
- unsigned long flags;
- unsigned long up;
- if (pin < S3C2410_GPIO_BANKB)
- return;
- local_irq_save(flags);
- up = __raw_readl(base + 0x08);
- up &= ~(0x3 << offs);
- up |= to << offs;
- __raw_writel(up, base + 0x08);
- local_irq_restore(flags);
- }
- #else
- 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);
- }
- #endif
- 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);
- int s3c2410_gpio_getirq(unsigned int pin)
- {
- if (pin < S3C2410_GPF0 || pin > S3C2410_GPG15)
- return -1; /* not valid interrupts */
- if (pin < S3C2410_GPG0 && pin > S3C2410_GPF7)
- return -1; /* not valid pin */
- if (pin < S3C2410_GPF4)
- return (pin - S3C2410_GPF0) + IRQ_EINT0;
- if (pin < S3C2410_GPG0)
- return (pin - S3C2410_GPF4) + IRQ_EINT4;
- return (pin - S3C2410_GPG0) + IRQ_EINT8;
- }
- EXPORT_SYMBOL(s3c2410_gpio_getirq);
- #if defined(CONFIG_PLAT_S3C64XX)
- /* --------------------------------------------------------------
- * Set up GPIOs
- *-------------------------------------------------------------*/
- static void __iomem *gpio_base_offset[]=
- {
- S3C24XX_VA_GPIO + 0x00, //GPA ,4bit
- S3C24XX_VA_GPIO + 0x20, //GPB ,4bit
- S3C24XX_VA_GPIO + 0x40, //GPC ,4bit
- S3C24XX_VA_GPIO + 0x60, //GPD ,4bit
- S3C24XX_VA_GPIO + 0x80, //GPE ,4bit
- S3C24XX_VA_GPIO + 0xA0, //GPF ,2bit
- S3C24XX_VA_GPIO + 0xC0, //GPG ,4bit
- S3C24XX_VA_GPIO + 0xE0, //GPH ,4bit
- S3C24XX_VA_GPIO + 0x100, //GPI ,2bit
- S3C24XX_VA_GPIO + 0x120, //GPJ ,2bit
- S3C24XX_VA_GPIO + 0x140, //GPO ,2bit
- S3C24XX_VA_GPIO + 0x160, //GPP ,2bit
- S3C24XX_VA_GPIO + 0x180, //GPQ ,2bit
- S3C24XX_VA_GPIO + 0x800, //GPK ,4bit
- S3C24XX_VA_GPIO + 0x810, //GPL ,4bit
- S3C24XX_VA_GPIO + 0x820, //GPM ,4bit
- S3C24XX_VA_GPIO + 0x830 //GPN ,2bit
- };
- void s3c_gpio_cfgpin(unsigned int pin, unsigned int function)
- {
- void __iomem *base = gpio_base_offset[S3C_GPIO_BASE(pin)];
- unsigned long mask;
- unsigned long con;
- unsigned long flags;
- unsigned long offs = S3C_GPIO_OFFSET(pin);
- if ((pin < S3C_GPIO_BANKF)||((pin >=S3C_GPIO_BANKG)&&\
- (pin<S3C_GPIO_BANKI))||((pin>=S3C_GPIO_BANKK)&&\
- (pin<S3C_GPIO_BANKN)))
- {
- offs = (offs) *4;
- if((pin == S3C_GPH8)||(pin==S3C_GPH9)||\
- (pin>=S3C_GPK8&&pin<=S3C_GPK15)||\
- (pin>=S3C_GPL8&&pin<=S3C_GPL14))
- {
- base = base + 0x04;
- /* only for con1:8~14 or 15 regiter configuratio nvalue change ...*/
- offs = offs - 32;
- }
- mask = 0xF << offs;
- }
- else
- {
- offs = offs*2;
- mask = 0x3 << offs;
- }
- local_irq_save(flags);
- con = __raw_readl(base + 0x00);
- con &= ~mask;
- con |= (function << offs);
- __raw_writel(con, base + 0x00);
- local_irq_restore(flags);
- }
- EXPORT_SYMBOL(s3c_gpio_cfgpin);
- unsigned int s3c_gpio_getcfg(unsigned int pin)
- {
- void __iomem *base = gpio_base_offset[S3C_GPIO_BASE(pin)];
- unsigned long mask;
- if ((pin < S3C_GPIO_BANKF)||((pin >=S3C_GPIO_BANKG)&&\
- (pin<S3C_GPIO_BANKI))||((pin>=S3C_GPIO_BANKK)&&\
- (pin<S3C_GPIO_BANKN)))
- {
- mask = 0xF << S3C_GPIO_OFFSET(pin)*4;
- if((pin == S3C_GPH8)||(pin==S3C_GPH9)||\
- (pin>=S3C_GPK8&&pin<=S3C_GPK15)||\
- (pin>=S3C_GPL8&&pin<=S3C_GPL14))
- {
- base = base + 0x04;
- mask = 0xF << (S3C_GPIO_OFFSET(pin)*4 -32);
- }
- }
- else
- {
- mask = 0x3 << S3C_GPIO_OFFSET(pin)*2;
- }
- return __raw_readl(base) & mask;
- }
- EXPORT_SYMBOL(s3c_gpio_getcfg);
- void s3c_gpio_pullup(unsigned int pin, unsigned int to)
- {
- void __iomem *base = gpio_base_offset[S3C_GPIO_BASE(pin)];
- unsigned long offs = S3C_GPIO_OFFSET(pin)*2;
- unsigned long flags;
- unsigned long up;
- unsigned long mask;
- mask = 0x3 << offs;
- if((pin>=S3C_GPH0 && pin<=S3C_GPH9)||\
- (pin>=S3C_GPK0 && pin<=S3C_GPK15)||\
- (pin>=S3C_GPL0 && pin<=S3C_GPL14))
- {
- base = base+0x04;
- }
- local_irq_save(flags);
- up = __raw_readl(base + 0x08);
- up &= ~mask;
- up |= to << offs;
- __raw_writel(up, base + 0x08);
- local_irq_restore(flags);
- }
- EXPORT_SYMBOL(s3c_gpio_pullup);
- void s3c_gpio_setpin(unsigned int pin, unsigned int to)
- {
- void __iomem *base = gpio_base_offset[S3C_GPIO_BASE(pin)];
- unsigned long offs = S3C_GPIO_OFFSET(pin);
- unsigned long flags;
- unsigned long dat;
- if((pin>=S3C_GPH0 && pin<=S3C_GPH9)||\
- (pin>=S3C_GPK0 && pin<=S3C_GPK15)||\
- (pin>=S3C_GPL0 && pin<=S3C_GPL14))
- {
- base = base+0x04;
- }
- 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(s3c_gpio_setpin);
- unsigned int s3c_gpio_getpin(unsigned int pin)
- {
- void __iomem *base = gpio_base_offset[S3C_GPIO_BASE(pin)];
- unsigned long offs = S3C_GPIO_OFFSET(pin);
- if((pin>=S3C_GPH0 && pin<=S3C_GPH9)||\
- (pin>=S3C_GPK0 && pin<=S3C_GPK15)||\
- (pin>=S3C_GPL0 && pin<=S3C_GPL14))
- {
- base = base+0x04;
- }
- return __raw_readl(base + 0x04) & (1<< offs);
- }
- EXPORT_SYMBOL(s3c_gpio_getpin);
- int s3c_gpio_getirq(unsigned int pin)
- {
- /* mandatory */
- /* Implement this function */
- return 0;
- }
- EXPORT_SYMBOL(s3c_gpio_getirq);
- int s3c_gpio_irqfilter(unsigned int pin, unsigned int on,
- unsigned int config)
- {
- return 0;
- }
- EXPORT_SYMBOL(s3c_gpio_irqfilter);
- #endif
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