110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef __AR7_GPIO_H__
|
|
#define __AR7_GPIO_H__
|
|
#include <asm/ar7/ar7.h>
|
|
|
|
#define AR7_GPIO_MAX 32
|
|
|
|
extern int gpio_request(unsigned gpio, const char *label);
|
|
extern void gpio_free(unsigned gpio);
|
|
|
|
/* Common GPIO layer */
|
|
static inline int gpio_get_value(unsigned gpio)
|
|
{
|
|
void __iomem *gpio_in =
|
|
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
|
|
|
|
return readl(gpio_in) & (1 << gpio);
|
|
}
|
|
|
|
static inline void gpio_set_value(unsigned gpio, int value)
|
|
{
|
|
void __iomem *gpio_out =
|
|
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT);
|
|
unsigned tmp;
|
|
|
|
tmp = readl(gpio_out) & ~(1 << gpio);
|
|
if (value)
|
|
tmp |= 1 << gpio;
|
|
writel(tmp, gpio_out);
|
|
}
|
|
|
|
static inline int gpio_direction_input(unsigned gpio)
|
|
{
|
|
void __iomem *gpio_dir =
|
|
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
|
|
|
|
if (gpio >= AR7_GPIO_MAX)
|
|
return -EINVAL;
|
|
|
|
writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpio_direction_output(unsigned gpio, int value)
|
|
{
|
|
void __iomem *gpio_dir =
|
|
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
|
|
|
|
if (gpio >= AR7_GPIO_MAX)
|
|
return -EINVAL;
|
|
|
|
gpio_set_value(gpio, value);
|
|
writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpio_to_irq(unsigned gpio)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int irq_to_gpio(unsigned irq)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Board specific GPIO functions */
|
|
static inline int ar7_gpio_enable(unsigned gpio)
|
|
{
|
|
void __iomem *gpio_en =
|
|
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
|
|
|
|
writel(readl(gpio_en) | (1 << gpio), gpio_en);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int ar7_gpio_disable(unsigned gpio)
|
|
{
|
|
void __iomem *gpio_en =
|
|
(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
|
|
|
|
writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <asm-generic/gpio.h>
|
|
|
|
#endif
|