1 files changed, 431 insertions, 0 deletions

diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c
new file mode 100644
index 00000000..1c0b0401
--- /dev/null
+++ b/arch/arm/plat-samsung/gpio-config.c
@@ -0,0 +1,431 @@
+/* linux/arch/arm/plat-s3c/gpio-config.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008-2010 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C series GPIO configuration core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+
+#include <plat/gpio-core.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+
+int s3c_gpio_cfgpin(unsigned int pin, unsigned int config)
+{
+	struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+	unsigned long flags;
+	int offset;
+	int ret;
+
+	if (!chip)
+		return -EINVAL;
+
+	offset = pin - chip->chip.base;
+
+	s3c_gpio_lock(chip, flags);
+	ret = s3c_gpio_do_setcfg(chip, offset, config);
+	s3c_gpio_unlock(chip, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL(s3c_gpio_cfgpin);
+
+int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr,
+			  unsigned int cfg)
+{
+	int ret;
+
+	for (; nr > 0; nr--, start++) {
+		ret = s3c_gpio_cfgpin(start, cfg);
+		if (ret != 0)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range);
+
+int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr,
+			  unsigned int cfg, s3c_gpio_pull_t pull)
+{
+	int ret;
+
+	for (; nr > 0; nr--, start++) {
+		s3c_gpio_setpull(start, pull);
+		ret = s3c_gpio_cfgpin(start, cfg);
+		if (ret != 0)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range);
+
+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;
+
+		s3c_gpio_lock(chip, flags);
+		ret = s3c_gpio_do_getcfg(chip, offset);
+		s3c_gpio_unlock(chip, 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);
+	unsigned long flags;
+	int offset, ret;
+
+	if (!chip)
+		return -EINVAL;
+
+	offset = pin - chip->chip.base;
+
+	s3c_gpio_lock(chip, flags);
+	ret = s3c_gpio_do_setpull(chip, offset, pull);
+	s3c_gpio_unlock(chip, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL(s3c_gpio_setpull);
+
+s3c_gpio_pull_t s3c_gpio_getpull(unsigned int pin)
+{
+	struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+	unsigned long flags;
+	int offset;
+	u32 pup = 0;
+
+	if (chip) {
+		offset = pin - chip->chip.base;
+
+		s3c_gpio_lock(chip, flags);
+		pup = s3c_gpio_do_getpull(chip, offset);
+		s3c_gpio_unlock(chip, flags);
+	}
+
+	return (__force s3c_gpio_pull_t)pup;
+}
+EXPORT_SYMBOL(s3c_gpio_getpull);
+
+#ifdef CONFIG_S3C_GPIO_CFG_S3C24XX
+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;
+	u32 con;
+
+	if (s3c_gpio_is_cfg_special(cfg)) {
+		cfg &= 0xf;
+
+		/* Map output to 0, and SFN2 to 1 */
+		cfg -= 1;
+		if (cfg > 1)
+			return -EINVAL;
+
+		cfg <<= shift;
+	}
+
+	con = __raw_readl(reg);
+	con &= ~(0x1 << shift);
+	con |= cfg;
+	__raw_writel(con, reg);
+
+	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)
+{
+	void __iomem *reg = chip->base;
+	unsigned int shift = off * 2;
+	u32 con;
+
+	if (s3c_gpio_is_cfg_special(cfg)) {
+		cfg &= 0xf;
+		if (cfg > 3)
+			return -EINVAL;
+
+		cfg <<= shift;
+	}
+
+	con = __raw_readl(reg);
+	con &= ~(0x3 << shift);
+	con |= cfg;
+	__raw_writel(con, reg);
+
+	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
+int s3c_gpio_setcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
+				 unsigned int off, unsigned int cfg)
+{
+	void __iomem *reg = chip->base;
+	unsigned int shift = (off & 7) * 4;
+	u32 con;
+
+	if (off < 8 && chip->chip.ngpio > 8)
+		reg -= 4;
+
+	if (s3c_gpio_is_cfg_special(cfg)) {
+		cfg &= 0xf;
+		cfg <<= shift;
+	}
+
+	con = __raw_readl(reg);
+	con &= ~(0xf << shift);
+	con |= cfg;
+	__raw_writel(con, reg);
+
+	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
+int s3c_gpio_setpull_updown(struct s3c_gpio_chip *chip,
+			    unsigned int off, s3c_gpio_pull_t pull)
+{
+	void __iomem *reg = chip->base + 0x08;
+	int shift = off * 2;
+	u32 pup;
+
+	pup = __raw_readl(reg);
+	pup &= ~(3 << shift);
+	pup |= pull << shift;
+	__raw_writel(pup, reg);
+
+	return 0;
+}
+
+s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip,
+					unsigned int off)
+{
+	void __iomem *reg = chip->base + 0x08;
+	int shift = off * 2;
+	u32 pup = __raw_readl(reg);
+
+	pup >>= shift;
+	pup &= 0x3;
+	return (__force s3c_gpio_pull_t)pup;
+}
+
+#ifdef CONFIG_S3C_GPIO_PULL_S3C2443
+int s3c_gpio_setpull_s3c2443(struct s3c_gpio_chip *chip,
+				unsigned int off, s3c_gpio_pull_t pull)
+{
+	switch (pull) {
+	case S3C_GPIO_PULL_NONE:
+		pull = 0x01;
+		break;
+	case S3C_GPIO_PULL_UP:
+		pull = 0x00;
+		break;
+	case S3C_GPIO_PULL_DOWN:
+		pull = 0x02;
+		break;
+	}
+	return s3c_gpio_setpull_updown(chip, off, pull);
+}
+
+s3c_gpio_pull_t s3c_gpio_getpull_s3c2443(struct s3c_gpio_chip *chip,
+					unsigned int off)
+{
+	s3c_gpio_pull_t pull;
+
+	pull = s3c_gpio_getpull_updown(chip, off);
+
+	switch (pull) {
+	case 0x00:
+		pull = S3C_GPIO_PULL_UP;
+		break;
+	case 0x01:
+	case 0x03:
+		pull = S3C_GPIO_PULL_NONE;
+		break;
+	case 0x02:
+		pull = S3C_GPIO_PULL_DOWN;
+		break;
+	}
+
+	return pull;
+}
+#endif
+#endif
+
+#if defined(CONFIG_S3C_GPIO_PULL_UP) || defined(CONFIG_S3C_GPIO_PULL_DOWN)
+static int s3c_gpio_setpull_1(struct s3c_gpio_chip *chip,
+			 unsigned int off, s3c_gpio_pull_t pull,
+			 s3c_gpio_pull_t updown)
+{
+	void __iomem *reg = chip->base + 0x08;
+	u32 pup = __raw_readl(reg);
+
+	if (pull == updown)
+		pup &= ~(1 << off);
+	else if (pull == S3C_GPIO_PULL_NONE)
+		pup |= (1 << off);
+	else
+		return -EINVAL;
+
+	__raw_writel(pup, reg);
+	return 0;
+}
+
+static s3c_gpio_pull_t s3c_gpio_getpull_1(struct s3c_gpio_chip *chip,
+				     unsigned int off, s3c_gpio_pull_t updown)
+{
+	void __iomem *reg = chip->base + 0x08;
+	u32 pup = __raw_readl(reg);
+
+	pup &= (1 << off);
+	return pup ? S3C_GPIO_PULL_NONE : updown;
+}
+#endif /* CONFIG_S3C_GPIO_PULL_UP || CONFIG_S3C_GPIO_PULL_DOWN */
+
+#ifdef CONFIG_S3C_GPIO_PULL_UP
+s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
+				     unsigned int off)
+{
+	return s3c_gpio_getpull_1(chip, off, S3C_GPIO_PULL_UP);
+}
+
+int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
+			 unsigned int off, s3c_gpio_pull_t pull)
+{
+	return s3c_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_UP);
+}
+#endif /* CONFIG_S3C_GPIO_PULL_UP */
+
+#ifdef CONFIG_S3C_GPIO_PULL_DOWN
+s3c_gpio_pull_t s3c_gpio_getpull_1down(struct s3c_gpio_chip *chip,
+				     unsigned int off)
+{
+	return s3c_gpio_getpull_1(chip, off, S3C_GPIO_PULL_DOWN);
+}
+
+int s3c_gpio_setpull_1down(struct s3c_gpio_chip *chip,
+			 unsigned int off, s3c_gpio_pull_t pull)
+{
+	return s3c_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_DOWN);
+}
+#endif /* CONFIG_S3C_GPIO_PULL_DOWN */
+
+#ifdef CONFIG_S5P_GPIO_DRVSTR
+s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin)
+{
+	struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+	unsigned int off;
+	void __iomem *reg;
+	int shift;
+	u32 drvstr;
+
+	if (!chip)
+		return -EINVAL;
+
+	off = pin - chip->chip.base;
+	shift = off * 2;
+	reg = chip->base + 0x0C;
+
+	drvstr = __raw_readl(reg);
+	drvstr = drvstr >> shift;
+	drvstr &= 0x3;
+
+	return (__force s5p_gpio_drvstr_t)drvstr;
+}
+EXPORT_SYMBOL(s5p_gpio_get_drvstr);
+
+int s5p_gpio_set_drvstr(unsigned int pin, s5p_gpio_drvstr_t drvstr)
+{
+	struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+	unsigned int off;
+	void __iomem *reg;
+	int shift;
+	u32 tmp;
+
+	if (!chip)
+		return -EINVAL;
+
+	off = pin - chip->chip.base;
+	shift = off * 2;
+	reg = chip->base + 0x0C;
+
+	tmp = __raw_readl(reg);
+	tmp &= ~(0x3 << shift);
+	tmp |= drvstr << shift;
+
+	__raw_writel(tmp, reg);
+
+	return 0;
+}
+EXPORT_SYMBOL(s5p_gpio_set_drvstr);
+#endif	/* CONFIG_S5P_GPIO_DRVSTR */