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Diffstat (limited to 'arch/arm/plat-s3c24xx/gpio.c')
-rw-r--r--arch/arm/plat-s3c24xx/gpio.c150
1 files changed, 22 insertions, 128 deletions
diff --git a/arch/arm/plat-s3c24xx/gpio.c b/arch/arm/plat-s3c24xx/gpio.c
index 5467470..2f3d7c0 100644
--- a/arch/arm/plat-s3c24xx/gpio.c
+++ b/arch/arm/plat-s3c24xx/gpio.c
@@ -1,6 +1,6 @@
/* linux/arch/arm/plat-s3c24xx/gpio.c
*
- * Copyright (c) 2004-2005 Simtec Electronics
+ * Copyright (c) 2004-2010 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* S3C24XX GPIO support
@@ -20,12 +20,12 @@
* 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/gpio.h>
#include <linux/io.h>
#include <mach/hardware.h>
@@ -34,133 +34,46 @@
#include <mach/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;
+#include <plat/gpio-core.h>
- 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);
+/* gpiolib wrappers until these are totally eliminated */
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;
+ int ret;
- if (pin < S3C2410_GPIO_BANKB)
- return;
+ WARN_ON(to); /* should be none of these left */
- local_irq_save(flags);
-
- up = __raw_readl(base + 0x08);
- up &= ~(1L << offs);
- up |= to << offs;
- __raw_writel(up, base + 0x08);
+ if (!to) {
+ /* if pull is enabled, try first with up, and if that
+ * fails, try using down */
- local_irq_restore(flags);
+ ret = s3c_gpio_setpull(pin, S3C_GPIO_PULL_UP);
+ if (ret)
+ s3c_gpio_setpull(pin, S3C_GPIO_PULL_DOWN);
+ } else {
+ s3c_gpio_setpull(pin, S3C_GPIO_PULL_NONE);
+ }
}
-
EXPORT_SYMBOL(s3c2410_gpio_pullup);
-int s3c2410_gpio_getpull(unsigned int pin)
-{
- void __iomem *base = S3C24XX_GPIO_BASE(pin);
- unsigned long offs = S3C2410_GPIO_OFFSET(pin);
-
- if (pin < S3C2410_GPIO_BANKB)
- return -EINVAL;
-
- return (__raw_readl(base + 0x08) & (1L << offs)) ? 1 : 0;
-}
-
-EXPORT_SYMBOL(s3c2410_gpio_getpull);
-
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;
+ /* do this via gpiolib until all users removed */
- local_irq_save(flags);
-
- dat = __raw_readl(base + 0x04);
- dat &= ~(1 << offs);
- dat |= to << offs;
- __raw_writel(dat, base + 0x04);
-
- local_irq_restore(flags);
+ gpio_request(pin, "temporary");
+ gpio_set_value(pin, to);
+ gpio_free(pin);
}
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);
+ struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+ unsigned long offs = pin - chip->chip.base;
- return __raw_readl(base + 0x04) & (1<< offs);
+ return __raw_readl(chip->base + 0x04) & (1<< offs);
}
EXPORT_SYMBOL(s3c2410_gpio_getpin);
@@ -181,22 +94,3 @@ unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
}
EXPORT_SYMBOL(s3c2410_modify_misccr);
-
-int s3c2410_gpio_getirq(unsigned int pin)
-{
- if (pin < S3C2410_GPF(0) || pin > S3C2410_GPG(15))
- return -EINVAL; /* not valid interrupts */
-
- if (pin < S3C2410_GPG(0) && pin > S3C2410_GPF(7))
- return -EINVAL; /* not valid pin */
-
- if (pin < S3C2410_GPF(4))
- return (pin - S3C2410_GPF(0)) + IRQ_EINT0;
-
- if (pin < S3C2410_GPG(0))
- return (pin - S3C2410_GPF(4)) + IRQ_EINT4;
-
- return (pin - S3C2410_GPG(0)) + IRQ_EINT8;
-}
-
-EXPORT_SYMBOL(s3c2410_gpio_getirq);
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