2 * Copyright (C) 2007 OpenWrt.org
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef __AR7_GPIO_H__
20 #define __AR7_GPIO_H__
21 #include <asm/ar7/ar7.h>
23 #define AR7_GPIO_MAX 32
25 extern int gpio_request(unsigned gpio, const char *label);
26 extern void gpio_free(unsigned gpio);
28 /* Common GPIO layer */
29 static inline int gpio_get_value(unsigned gpio)
31 void __iomem *gpio_in =
32 (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT);
34 if (gpio >= AR7_GPIO_MAX)
37 return ((readl(gpio_in) & (1 << gpio)) != 0);
40 static inline void gpio_set_value(unsigned gpio, int value)
42 void __iomem *gpio_out =
43 (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT);
44 volatile unsigned tmp;
46 if (gpio >= AR7_GPIO_MAX)
49 tmp = readl(gpio_out) & ~(1 << gpio);
52 writel(tmp, gpio_out);
55 static inline int gpio_direction_input(unsigned gpio)
57 void __iomem *gpio_dir =
58 (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
60 if (gpio >= AR7_GPIO_MAX)
63 writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
68 static inline int gpio_direction_output(unsigned gpio, int value)
70 void __iomem *gpio_dir =
71 (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR);
73 if (gpio >= AR7_GPIO_MAX)
76 gpio_set_value(gpio, value);
77 writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
82 static inline int gpio_to_irq(unsigned gpio)
87 static inline int irq_to_gpio(unsigned irq)
92 /* Board specific GPIO functions */
93 static inline int ar7_gpio_enable(unsigned gpio)
95 void __iomem *gpio_en =
96 (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
98 if (gpio >= AR7_GPIO_MAX)
101 writel(readl(gpio_en) | (1 << gpio), gpio_en);
106 static inline int ar7_gpio_disable(unsigned gpio)
108 void __iomem *gpio_en =
109 (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE);
111 if (gpio >= AR7_GPIO_MAX)
114 writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
119 #include <asm-generic/gpio.h>