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
, char *label
);
26 extern void gpio_free(unsigned gpio
);
28 /* Common GPIO layer */
29 static inline int gpio_direction_input(unsigned gpio
)
31 void __iomem
*gpio_dir
=
32 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_DIR
);
34 if (gpio
>= AR7_GPIO_MAX
)
37 writel(readl(gpio_dir
) | (1 << gpio
), gpio_dir
);
42 static inline int gpio_direction_output(unsigned gpio
)
44 void __iomem
*gpio_dir
=
45 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_DIR
);
47 if (gpio
>= AR7_GPIO_MAX
)
50 writel(readl(gpio_dir
) & ~(1 << gpio
), gpio_dir
);
55 static inline int gpio_get_value(unsigned gpio
)
57 void __iomem
*gpio_in
=
58 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_INPUT
);
60 if (gpio
>= AR7_GPIO_MAX
)
63 return ((readl(gpio_in
) & (1 << gpio
)) != 0);
66 static inline void gpio_set_value(unsigned gpio
, int value
)
68 void __iomem
*gpio_out
=
69 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_OUTPUT
);
70 volatile unsigned tmp
;
72 if (gpio
>= AR7_GPIO_MAX
)
75 tmp
= readl(gpio_out
) & ~(1 << gpio
);
78 writel(tmp
, gpio_out
);
81 static inline int gpio_to_irq(unsigned gpio
)
86 static inline int irq_to_gpio(unsigned irq
)
91 /* Board specific GPIO functions */
92 static inline int ar7_gpio_enable(unsigned gpio
)
94 void __iomem
*gpio_en
=
95 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_ENABLE
);
97 if (gpio
>= AR7_GPIO_MAX
)
100 writel(readl(gpio_en
) | (1 << gpio
), gpio_en
);
105 static inline int ar7_gpio_disable(unsigned gpio
)
107 void __iomem
*gpio_en
=
108 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_ENABLE
);
110 if (gpio
>= AR7_GPIO_MAX
)
113 writel(readl(gpio_en
) & ~(1 << gpio
), gpio_en
);
118 #include <asm-generic/gpio.h>