/* linux/arch/arm/mach-s3c2410/gpio.c
*
- * Copyright (c) 2004 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
+ * Copyright (c) 2004-2005 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
*
- * S3C2410 GPIO support
+ * 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
* 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>
void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function)
{
- unsigned long base = S3C2410_GPIO_BASE(pin);
- unsigned long shift = 1;
- unsigned long mask = 3;
+ void __iomem *base = S3C24XX_GPIO_BASE(pin);
+ unsigned long mask;
unsigned long con;
unsigned long flags;
if (pin < S3C2410_GPIO_BANKB) {
- shift = 0;
- mask = 1;
+ mask = 1 << S3C2410_GPIO_OFFSET(pin);
+ } else {
+ mask = 3 << S3C2410_GPIO_OFFSET(pin)*2;
}
- mask <<= S3C2410_GPIO_OFFSET(pin);
+ 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;
+ }
+ }
- local_irq_save(flags);
+ /* modify the specified register wwith IRQs off */
- con = __raw_readl(base + 0x00);
+ local_irq_save(flags);
- con &= mask << shift;
+ 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);
+
void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
{
- unsigned long base = S3C2410_GPIO_BASE(pin);
+ void __iomem *base = S3C24XX_GPIO_BASE(pin);
unsigned long offs = S3C2410_GPIO_OFFSET(pin);
unsigned long flags;
unsigned long up;
local_irq_save(flags);
up = __raw_readl(base + 0x08);
- up &= 1 << offs;
+ 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)
{
- unsigned long base = S3C2410_GPIO_BASE(pin);
+ 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 &= ~(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);