package/boot/uboot-ar71xx/files/include/asm-mips/ar71xx_gpio.h

   1 /*
   2  * (C) Copyright 2010
   3  * Michael Kurz <michi.kurz@googlemail.com>.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef _AR71XX_GPIO_H
  25 #define _AR71XX_GPIO_H
  26
  27 #include <common.h>
  28 #include <asm/ar71xx.h>
  29
  30 static inline void ar71xx_setpin(uint8_t pin, uint8_t state)
  31 {
  32         uint32_t reg = readl(KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_OUT));
  33
  34         if (state != 0) {
  35        reg |= (1 << pin);
  36    } else {
  37        reg &= ~(1 << pin);
  38    }
  39
  40         writel(reg, KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_OUT));
  41         readl(KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_OUT));
  42 }
  43
  44 static inline uint32_t ar71xx_getpin(uint8_t pin)
  45 {
  46     uint32_t reg = readl(KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_IN));
  47     return (((reg & (1 << pin)) != 0) ? 1 : 0);
  48 }
  49
  50 static inline void ar71xx_setpindir(uint8_t pin, uint8_t direction)
  51 {
  52         uint32_t reg = readl(KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_OE));
  53
  54         if (direction != 0) {
  55         reg |= (1 << pin);
  56     } else {
  57         reg &= ~(1 << pin);
  58     }
  59
  60         writel(reg, KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_OE));
  61         readl(KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_OE));
  62 }
  63
  64
  65 #endif /* AR71XX_GPIO_H */