summaryrefslogtreecommitdiffstats
path: root/arch/arm/plat-samsung/gpio-config.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-samsung/gpio-config.c')
-rw-r--r--arch/arm/plat-samsung/gpio-config.c103
1 files changed, 100 insertions, 3 deletions
diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c
index 44a84e896546..3282db360fa8 100644
--- a/arch/arm/plat-samsung/gpio-config.c
+++ b/arch/arm/plat-samsung/gpio-config.c
@@ -1,7 +1,7 @@
/* linux/arch/arm/plat-s3c/gpio-config.c
*
* Copyright 2008 Openmoko, Inc.
- * Copyright 2008 Simtec Electronics
+ * Copyright 2008-2010 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
@@ -41,6 +41,26 @@ int s3c_gpio_cfgpin(unsigned int pin, unsigned int config)
}
EXPORT_SYMBOL(s3c_gpio_cfgpin);
+unsigned s3c_gpio_getcfg(unsigned int pin)
+{
+ struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+ unsigned long flags;
+ unsigned ret = 0;
+ int offset;
+
+ if (chip) {
+ offset = pin - chip->chip.base;
+
+ local_irq_save(flags);
+ ret = s3c_gpio_do_getcfg(chip, offset);
+ local_irq_restore(flags);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(s3c_gpio_getcfg);
+
+
int s3c_gpio_setpull(unsigned int pin, s3c_gpio_pull_t pull)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
@@ -61,8 +81,8 @@ int s3c_gpio_setpull(unsigned int pin, s3c_gpio_pull_t pull)
EXPORT_SYMBOL(s3c_gpio_setpull);
#ifdef CONFIG_S3C_GPIO_CFG_S3C24XX
-int s3c_gpio_setcfg_s3c24xx_banka(struct s3c_gpio_chip *chip,
- unsigned int off, unsigned int cfg)
+int s3c_gpio_setcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
+ unsigned int off, unsigned int cfg)
{
void __iomem *reg = chip->base;
unsigned int shift = off;
@@ -87,6 +107,19 @@ int s3c_gpio_setcfg_s3c24xx_banka(struct s3c_gpio_chip *chip,
return 0;
}
+unsigned s3c_gpio_getcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ u32 con;
+
+ con = __raw_readl(chip->base);
+ con >>= off;
+ con &= 1;
+ con++;
+
+ return S3C_GPIO_SFN(con);
+}
+
int s3c_gpio_setcfg_s3c24xx(struct s3c_gpio_chip *chip,
unsigned int off, unsigned int cfg)
{
@@ -109,6 +142,19 @@ int s3c_gpio_setcfg_s3c24xx(struct s3c_gpio_chip *chip,
return 0;
}
+
+unsigned int s3c_gpio_getcfg_s3c24xx(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ u32 con;
+
+ con = __raw_readl(chip->base);
+ con >>= off * 2;
+ con &= 3;
+
+ /* this conversion works for IN and OUT as well as special mode */
+ return S3C_GPIO_SPECIAL(con);
+}
#endif
#ifdef CONFIG_S3C_GPIO_CFG_S3C64XX
@@ -134,6 +180,25 @@ int s3c_gpio_setcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
return 0;
}
+
+unsigned s3c_gpio_getcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ void __iomem *reg = chip->base;
+ unsigned int shift = (off & 7) * 4;
+ u32 con;
+
+ if (off < 8 && chip->chip.ngpio > 8)
+ reg -= 4;
+
+ con = __raw_readl(reg);
+ con >>= shift;
+ con &= 0xf;
+
+ /* this conversion works for IN and OUT as well as special mode */
+ return S3C_GPIO_SPECIAL(con);
+}
+
#endif /* CONFIG_S3C_GPIO_CFG_S3C64XX */
#ifdef CONFIG_S3C_GPIO_PULL_UPDOWN
@@ -164,3 +229,35 @@ s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip,
return (__force s3c_gpio_pull_t)pup;
}
#endif
+
+#ifdef CONFIG_S3C_GPIO_PULL_UP
+int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
+ unsigned int off, s3c_gpio_pull_t pull)
+{
+ void __iomem *reg = chip->base + 0x08;
+ u32 pup = __raw_readl(reg);
+
+ pup = __raw_readl(reg);
+
+ if (pup == S3C_GPIO_PULL_UP)
+ pup &= ~(1 << off);
+ else if (pup == S3C_GPIO_PULL_NONE)
+ pup |= (1 << off);
+ else
+ return -EINVAL;
+
+ __raw_writel(pup, reg);
+ return 0;
+}
+
+s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ void __iomem *reg = chip->base + 0x08;
+ u32 pup = __raw_readl(reg);
+
+ pup &= (1 << off);
+ return pup ? S3C_GPIO_PULL_NONE : S3C_GPIO_PULL_UP;
+}
+#endif /* CONFIG_S3C_GPIO_PULL_UP */
+