2 * Copyright (C) 2007 Florian Fainelli <florian@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__
22 #include <asm/mach-ar7/ar7.h>
24 #define AR7_GPIO_MAX 32
26 extern int gpio_request(unsigned gpio
, const char *label
);
27 extern void gpio_free(unsigned gpio
);
29 /* Common GPIO layer */
30 static inline int gpio_get_value(unsigned gpio
)
32 void __iomem
*gpio_in
=
33 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_INPUT
);
35 return readl(gpio_in
) & (1 << gpio
);
38 static inline void gpio_set_value(unsigned gpio
, int value
)
40 void __iomem
*gpio_out
=
41 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_OUTPUT
);
44 tmp
= readl(gpio_out
) & ~(1 << gpio
);
47 writel(tmp
, gpio_out
);
50 static inline int gpio_direction_input(unsigned gpio
)
52 void __iomem
*gpio_dir
=
53 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_DIR
);
55 if (gpio
>= AR7_GPIO_MAX
)
58 writel(readl(gpio_dir
) | (1 << gpio
), gpio_dir
);
63 static inline int gpio_direction_output(unsigned gpio
, int value
)
65 void __iomem
*gpio_dir
=
66 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_DIR
);
68 if (gpio
>= AR7_GPIO_MAX
)
71 gpio_set_value(gpio
, value
);
72 writel(readl(gpio_dir
) & ~(1 << gpio
), gpio_dir
);
77 static inline int gpio_to_irq(unsigned gpio
)
82 static inline int irq_to_gpio(unsigned irq
)
87 /* Board specific GPIO functions */
88 static inline int ar7_gpio_enable(unsigned gpio
)
90 void __iomem
*gpio_en
=
91 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_ENABLE
);
93 writel(readl(gpio_en
) | (1 << gpio
), gpio_en
);
98 static inline int ar7_gpio_disable(unsigned gpio
)
100 void __iomem
*gpio_en
=
101 (void __iomem
*)KSEG1ADDR(AR7_REGS_GPIO
+ AR7_GPIO_ENABLE
);
103 writel(readl(gpio_en
) & ~(1 << gpio
), gpio_en
);
108 #include <asm-generic/gpio.h>