4 * Copyright (C) 2007 OpenWrt.org
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef __AR7_GPIO_H__
22 #define __AR7_GPIO_H__
23 #include <asm/ar7/ar7.h>
25 #define AR7_GPIO_MAX 32
27 extern int gpio_request(unsigned gpio, char *label);
28 extern void gpio_free(unsigned gpio);
30 /* Common GPIO layer */
31 static inline int gpio_direction_input(unsigned gpio)
33 void __iomem *gpio_dir = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
35 if (gpio >= AR7_GPIO_MAX)
38 __raw_writel(__raw_readl(gpio_dir) | (1 << gpio), gpio_dir);
43 static inline int gpio_direction_output(unsigned gpio)
45 void __iomem *gpio_dir = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
47 if (gpio >= AR7_GPIO_MAX)
50 __raw_writel(__raw_readl(gpio_dir) & ~(1 << gpio), gpio_dir);
55 static inline int gpio_get_value(unsigned gpio)
57 void __iomem *gpio_in = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
59 if (gpio >= AR7_GPIO_MAX)
62 return ((__raw_readl(gpio_in) & (1 << gpio)) != 0);
65 static inline void gpio_set_value(unsigned gpio, int value)
67 void __iomem *gpio_out = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT);
68 volatile unsigned tmp;
70 if (gpio >= AR7_GPIO_MAX)
73 tmp = __raw_readl(gpio_out) & ~(1 << gpio);
76 __raw_writel(tmp, gpio_out);
79 static inline int gpio_to_irq(unsigned gpio)
84 static inline int irq_to_gpio(unsigned irq)
89 /* Board specific GPIO functions */
90 static inline int ar7_gpio_enable(unsigned gpio)
92 void __iomem *gpio_en = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
94 if (gpio >= AR7_GPIO_MAX)
97 __raw_writel(__raw_readl(gpio_en) | (1 << gpio), gpio_en);
102 static inline int ar7_gpio_disable(unsigned gpio)
104 void __iomem *gpio_en = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
106 if (gpio >= AR7_GPIO_MAX)
109 __raw_writel(__raw_readl(gpio_en) & ~(1 << gpio), gpio_en);
114 #include <asm-generic/gpio.h>