[ARM] S3C: Add new GPIO configuration calls

Add new GPIO configuration calls that mesh with the
new gpiolib support.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 163 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c/gpio-config.c b/arch/arm/plat-s3c/gpio-config.c
new file mode 100644
index 000000000000..7642b975a998
--- /dev/null
+++ b/arch/arm/plat-s3c/gpio-config.c
@@ -0,0 +1,163 @@
+/* linux/arch/arm/plat-s3c/gpio-config.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 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/gpio.h>
+#include <linux/io.h>
+
+#include <mach/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;
+
+        local_irq_save(flags);
+        ret = s3c_gpio_do_setcfg(chip, offset, config);
+        local_irq_restore(flags);
+
+        return ret;
+}
+
+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;
+
+        local_irq_save(flags);
+        ret = s3c_gpio_do_setpull(chip, offset, pull);
+        local_irq_restore(flags);
+
+        return ret;
+}
+
+#ifdef CONFIG_S3C_GPIO_CFG_S3C24XX
+int s3c_gpio_setcfg_s3c24xx_banka(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;
+}
+
+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;
+}
+#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;
+}
+#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;
+}
+#endif