diff options
author | Wolfgang Denk <wd@denx.de> | 2010-05-04 22:49:15 +0200 |
---|---|---|
committer | Wolfgang Denk <wd@denx.de> | 2010-05-04 22:49:15 +0200 |
commit | 900a1fe8c8c7acda1d8903af02c2d0d993b770d8 (patch) | |
tree | b17bb283aa7fe7b31f46fbdfd3496b7f23736840 /drivers/gpio/s5p_gpio.c | |
parent | 4185ae7a7146a77a792e5ba49845e5ca6e95b038 (diff) | |
parent | 20d98c2cea3398ad93beccd4727a371f41514086 (diff) | |
download | u-boot-imx-900a1fe8c8c7acda1d8903af02c2d0d993b770d8.zip u-boot-imx-900a1fe8c8c7acda1d8903af02c2d0d993b770d8.tar.gz u-boot-imx-900a1fe8c8c7acda1d8903af02c2d0d993b770d8.tar.bz2 |
Merge branch 'master' of git://git.denx.de/u-boot-arm
Diffstat (limited to 'drivers/gpio/s5p_gpio.c')
-rw-r--r-- | drivers/gpio/s5p_gpio.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/gpio/s5p_gpio.c b/drivers/gpio/s5p_gpio.c new file mode 100644 index 0000000..0439477 --- /dev/null +++ b/drivers/gpio/s5p_gpio.c @@ -0,0 +1,143 @@ +/* + * (C) Copyright 2009 Samsung Electronics + * Minkyu Kang <mk7.kang@samsung.com> + * + * 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, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/gpio.h> + +#define CON_MASK(x) (0xf << ((x) << 2)) +#define CON_SFR(x, v) ((v) << ((x) << 2)) + +#define DAT_MASK(x) (0x1 << (x)) +#define DAT_SET(x) (0x1 << (x)) + +#define PULL_MASK(x) (0x3 << ((x) << 1)) +#define PULL_MODE(x, v) ((v) << ((x) << 1)) + +#define DRV_MASK(x) (0x3 << ((x) << 1)) +#define DRV_SET(x, m) ((m) << ((x) << 1)) +#define RATE_MASK(x) (0x1 << (x + 16)) +#define RATE_SET(x) (0x1 << (x + 16)) + +void gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg) +{ + unsigned int value; + + value = readl(&bank->con); + value &= ~CON_MASK(gpio); + value |= CON_SFR(gpio, cfg); + writel(value, &bank->con); +} + +void gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en) +{ + unsigned int value; + + gpio_cfg_pin(bank, gpio, GPIO_OUTPUT); + + value = readl(&bank->dat); + value &= ~DAT_MASK(gpio); + if (en) + value |= DAT_SET(gpio); + writel(value, &bank->dat); +} + +void gpio_direction_input(struct s5p_gpio_bank *bank, int gpio) +{ + gpio_cfg_pin(bank, gpio, GPIO_INPUT); +} + +void gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en) +{ + unsigned int value; + + value = readl(&bank->dat); + value &= ~DAT_MASK(gpio); + if (en) + value |= DAT_SET(gpio); + writel(value, &bank->dat); +} + +unsigned int gpio_get_value(struct s5p_gpio_bank *bank, int gpio) +{ + unsigned int value; + + value = readl(&bank->dat); + return !!(value & DAT_MASK(gpio)); +} + +void gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode) +{ + unsigned int value; + + value = readl(&bank->pull); + value &= ~PULL_MASK(gpio); + + switch (mode) { + case GPIO_PULL_DOWN: + case GPIO_PULL_UP: + value |= PULL_MODE(gpio, mode); + break; + default: + return; + } + + writel(value, &bank->pull); +} + +void gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode) +{ + unsigned int value; + + value = readl(&bank->drv); + value &= ~DRV_MASK(gpio); + + switch (mode) { + case GPIO_DRV_1X: + case GPIO_DRV_2X: + case GPIO_DRV_3X: + case GPIO_DRV_4X: + value |= DRV_SET(gpio, mode); + break; + default: + return; + } + + writel(value, &bank->drv); +} + +void gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode) +{ + unsigned int value; + + value = readl(&bank->drv); + value &= ~RATE_MASK(gpio); + + switch (mode) { + case GPIO_DRV_FAST: + case GPIO_DRV_SLOW: + value |= RATE_SET(gpio); + break; + default: + return; + } + + writel(value, &bank->drv); +} |