111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
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/*
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* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __AR7_GPIO_H__
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#define __AR7_GPIO_H__
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#include <asm/mach-ar7/ar7.h>
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#define AR7_GPIO_MAX 32
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extern int gpio_request(unsigned gpio, const char *label);
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extern void gpio_free(unsigned gpio);
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/* Common GPIO layer */
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static inline int gpio_get_value(unsigned gpio)
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{
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void __iomem *gpio_in =
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(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
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return readl(gpio_in) & (1 << gpio);
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}
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static inline void gpio_set_value(unsigned gpio, int value)
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{
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void __iomem *gpio_out =
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(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT);
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unsigned tmp;
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tmp = readl(gpio_out) & ~(1 << gpio);
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if (value)
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tmp |= 1 << gpio;
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writel(tmp, gpio_out);
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}
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static inline int gpio_direction_input(unsigned gpio)
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{
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void __iomem *gpio_dir =
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(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
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if (gpio >= AR7_GPIO_MAX)
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return -EINVAL;
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writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
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return 0;
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}
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static inline int gpio_direction_output(unsigned gpio, int value)
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{
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void __iomem *gpio_dir =
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(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
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if (gpio >= AR7_GPIO_MAX)
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return -EINVAL;
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gpio_set_value(gpio, value);
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writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
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return 0;
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}
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static inline int gpio_to_irq(unsigned gpio)
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{
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return -EINVAL;
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}
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static inline int irq_to_gpio(unsigned irq)
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{
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return -EINVAL;
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}
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/* Board specific GPIO functions */
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static inline int ar7_gpio_enable(unsigned gpio)
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{
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void __iomem *gpio_en =
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(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
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writel(readl(gpio_en) | (1 << gpio), gpio_en);
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return 0;
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}
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static inline int ar7_gpio_disable(unsigned gpio)
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{
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void __iomem *gpio_en =
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(void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
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writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
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return 0;
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}
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#include <asm-generic/gpio.h>
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#endif
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