diff options
Diffstat (limited to 'src/soc/rockchip/rk3288/gpio.c')
-rwxr-xr-x | src/soc/rockchip/rk3288/gpio.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3288/gpio.c b/src/soc/rockchip/rk3288/gpio.c new file mode 100755 index 0000000000..46ef2eb114 --- /dev/null +++ b/src/soc/rockchip/rk3288/gpio.c @@ -0,0 +1,84 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Rockchip Inc. + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/io.h> +#include <stdlib.h> +#include "cpu.h" +#include "gpio.h" +#include "pmu.h" + +struct rk3288_gpio_regs *gpio_port[] = { + (struct rk3288_gpio_regs *)0xff750000, + (struct rk3288_gpio_regs *)0xff780000, + (struct rk3288_gpio_regs *)0xff790000, + (struct rk3288_gpio_regs *)0xff7a0000, + (struct rk3288_gpio_regs *)0xff7b0000, + (struct rk3288_gpio_regs *)0xff7c0000, + (struct rk3288_gpio_regs *)0xff7d0000, + (struct rk3288_gpio_regs *)0xff7e0000, + (struct rk3288_gpio_regs *)0xff7f0000 +}; + +enum { + PULLNONE = 0, + PULLUP, + PULLDOWN +}; + +#define PMU_GPIO_PORT 0 + +static void __gpio_input(gpio_t gpio, u32 pull) +{ + clrbits_le32(&gpio_port[gpio.port]->swporta_ddr, 1 << gpio.num); + if (gpio.port == PMU_GPIO_PORT) + clrsetbits_le32(&rk3288_pmu->gpio0pull[gpio.bank], + 3 << (gpio.idx * 2), pull << (gpio.idx * 2)); + else + writel(RK_CLRSETBITS(3 << (gpio.idx * 2), + pull << (gpio.idx * 2)), + &rk3288_grf->gpio1_p[(gpio.port - 1)][gpio.bank]); +} + +void gpio_input(gpio_t gpio) +{ + __gpio_input(gpio, PULLNONE); +} + +void gpio_input_pulldown(gpio_t gpio) +{ + __gpio_input(gpio, PULLDOWN); +} + +void gpio_input_pullup(gpio_t gpio) +{ + __gpio_input(gpio, PULLUP); +} + +int gpio_get_in_value(gpio_t gpio) +{ + return (readl(&gpio_port[gpio.port]->ext_porta) >> gpio.num) & 0x1; +} + +void gpio_output(gpio_t gpio, int value) +{ + setbits_le32(&gpio_port[gpio.port]->swporta_ddr, 1 << gpio.num); + clrsetbits_le32(&gpio_port[gpio.port]->swporta_dr, 1 << gpio.num, + !!value << gpio.num); +} |