48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Module wrapper for GPIO, using /dev/r0GPIO (r0Gpio.ko) of Samsung YP-R0
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*
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* Copyright (c) 2011 Lorenzo Miori
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <gpio-target.h> /* includes common ioctl device definitions */
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#include <sys/ioctl.h>
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static int r0_gpio_dev = 0;
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void gpio_init(void)
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{
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r0_gpio_dev = open("/dev/r0GPIO", O_RDONLY);
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if (r0_gpio_dev < 0)
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printf("/dev/r0GPIO open error!");
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}
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void gpio_close(void)
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{
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if (r0_gpio_dev >= 0)
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close(r0_gpio_dev);
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}
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int gpio_control(int request, int num, int mode, int val)
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{
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struct gpio_info r = { .num = num, .mode = mode, .val = val, };
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return ioctl(r0_gpio_dev, request, &r);
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}
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