1 files changed, 188 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c24xx/gpio.c b/arch/arm/plat-s3c24xx/gpio.c
new file mode 100644
index 000000000000..ec3a09c4d181
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/gpio.c
@@ -0,0 +1,188 @@
+/* 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);
+
+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);
+
+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);