gpio/s3c24xx: move gpio driver into drivers/gpio/

Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 288 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d539efd96d4b..5654e1b082af 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -135,6 +135,10 @@ config GPIO_PLAT_SAMSUNG
         def_bool y
         depends on SAMSUNG_GPIOLIB_4BIT
 
+config GPIO_S3C24XX
+        def_bool y
+        depends on PLAT_S3C24XX
+
 config GPIO_S5PC100
         def_bool y
         depends on CPU_S5PC100
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 9588948c96f0..c7f1c00986c9 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_GPIO_PL061)	+= gpio-pl061.o
 obj-$(CONFIG_GPIO_RDC321X)      += gpio-rdc321x.o
 
 obj-$(CONFIG_GPIO_PLAT_SAMSUNG) += gpio-plat-samsung.o
+obj-$(CONFIG_GPIO_S3C24XX)      += gpio-s3c24xx.o
 obj-$(CONFIG_GPIO_S5PC100)      += gpio-s5pc100.o
 obj-$(CONFIG_GPIO_S5PV210)      += gpio-s5pv210.o
 
diff --git a/drivers/gpio/gpio-s3c24xx.c b/drivers/gpio/gpio-s3c24xx.c
new file mode 100644
index 000000000000..ff6103130fe8
--- /dev/null
+++ b/drivers/gpio/gpio-s3c24xx.c
@@ -0,0 +1,283 @@
+/*
+ * Copyright (c) 2008-2010 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX GPIOlib 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.
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/sysdev.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <asm/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/gpio-fns.h>
+#include <mach/regs-gpio.h>
+
+#include <plat/gpio-core.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+#include <plat/pm.h>
+
+static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
+{
+        return -EINVAL;
+}
+
+static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
+                                        unsigned offset, int value)
+{
+        struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+        void __iomem *base = ourchip->base;
+        unsigned long flags;
+        unsigned long dat;
+        unsigned long con;
+
+        local_irq_save(flags);
+
+        con = __raw_readl(base + 0x00);
+        dat = __raw_readl(base + 0x04);
+
+        dat &= ~(1 << offset);
+        if (value)
+                dat |= 1 << offset;
+
+        __raw_writel(dat, base + 0x04);
+
+        con &= ~(1 << offset);
+
+        __raw_writel(con, base + 0x00);
+        __raw_writel(dat, base + 0x04);
+
+        local_irq_restore(flags);
+        return 0;
+}
+
+static int s3c24xx_gpiolib_bankf_toirq(struct gpio_chip *chip, unsigned offset)
+{
+        if (offset < 4)
+                return IRQ_EINT0 + offset;
+        
+        if (offset < 8)
+                return IRQ_EINT4 + offset - 4;
+        
+        return -EINVAL;
+}
+
+static struct s3c_gpio_cfg s3c24xx_gpiocfg_banka = {
+        .set_config     = s3c_gpio_setcfg_s3c24xx_a,
+        .get_config     = s3c_gpio_getcfg_s3c24xx_a,
+};
+
+struct s3c_gpio_cfg s3c24xx_gpiocfg_default = {
+        .set_config     = s3c_gpio_setcfg_s3c24xx,
+        .get_config     = s3c_gpio_getcfg_s3c24xx,
+};
+
+struct s3c_gpio_chip s3c24xx_gpios[] = {
+        [0] = {
+                .base   = S3C2410_GPACON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_1bit),
+                .config = &s3c24xx_gpiocfg_banka,
+                .chip   = {
+                        .base                   = S3C2410_GPA(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOA",
+                        .ngpio                  = 24,
+                        .direction_input        = s3c24xx_gpiolib_banka_input,
+                        .direction_output       = s3c24xx_gpiolib_banka_output,
+                },
+        },
+        [1] = {
+                .base   = S3C2410_GPBCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPB(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOB",
+                        .ngpio                  = 16,
+                },
+        },
+        [2] = {
+                .base   = S3C2410_GPCCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPC(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOC",
+                        .ngpio                  = 16,
+                },
+        },
+        [3] = {
+                .base   = S3C2410_GPDCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPD(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOD",
+                        .ngpio                  = 16,
+                },
+        },
+        [4] = {
+                .base   = S3C2410_GPECON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPE(0),
+                        .label                  = "GPIOE",
+                        .owner                  = THIS_MODULE,
+                        .ngpio                  = 16,
+                },
+        },
+        [5] = {
+                .base   = S3C2410_GPFCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPF(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOF",
+                        .ngpio                  = 8,
+                        .to_irq                 = s3c24xx_gpiolib_bankf_toirq,
+                },
+        },
+        [6] = {
+                .base   = S3C2410_GPGCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .irq_base = IRQ_EINT8,
+                .chip   = {
+                        .base                   = S3C2410_GPG(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOG",
+                        .ngpio                  = 16,
+                        .to_irq                 = samsung_gpiolib_to_irq,
+                },
+        }, {
+                .base   = S3C2410_GPHCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPH(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOH",
+                        .ngpio                  = 11,
+                },
+        },
+                /* GPIOS for the S3C2443 and later devices. */
+        {
+                .base   = S3C2440_GPJCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPJ(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOJ",
+                        .ngpio                  = 16,
+                },
+        }, {
+                .base   = S3C2443_GPKCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPK(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOK",
+                        .ngpio                  = 16,
+                },
+        }, {
+                .base   = S3C2443_GPLCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPL(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOL",
+                        .ngpio                  = 15,
+                },
+        }, {
+                .base   = S3C2443_GPMCON,
+                .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
+                .chip   = {
+                        .base                   = S3C2410_GPM(0),
+                        .owner                  = THIS_MODULE,
+                        .label                  = "GPIOM",
+                        .ngpio                  = 2,
+                },
+        },
+};
+
+static __init int s3c24xx_gpiolib_init(void)
+{
+        struct s3c_gpio_chip *chip = s3c24xx_gpios;
+        int gpn;
+
+        for (gpn = 0; gpn < ARRAY_SIZE(s3c24xx_gpios); gpn++, chip++) {
+                if (!chip->config)
+                        chip->config = &s3c24xx_gpiocfg_default;
+
+                s3c_gpiolib_add(chip);
+        }
+
+        return 0;
+}
+core_initcall(s3c24xx_gpiolib_init);
+
+/* gpiolib wrappers until these are totally eliminated */
+
+void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
+{
+        int ret;
+
+        WARN_ON(to);    /* should be none of these left */
+
+        if (!to) {
+                /* if pull is enabled, try first with up, and if that
+                 * fails, try using down */
+
+                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);
+
+void s3c2410_gpio_setpin(unsigned int pin, unsigned int to)
+{
+        /* do this via gpiolib until all users removed */
+
+        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)
+{
+        struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+        unsigned long offs = pin - chip->chip.base;
+
+        return __raw_readl(chip->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);