1 /* 2 * Copyright (c) 2008, Google Inc. 3 * Copyright (c) 2012, Travis Geiselbrecht 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 20 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 23 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 #pragma once 30 31 enum gpio_flags { 32 GPIO_INPUT = (1 << 0), 33 GPIO_OUTPUT = (1 << 1), 34 GPIO_LEVEL = (1 << 2), 35 GPIO_EDGE = (1 << 3), 36 GPIO_RISING = (1 << 4), 37 GPIO_FALLING = (1 << 5), 38 GPIO_HIGH = (1 << 6), 39 GPIO_LOW = (1 << 7), 40 GPIO_PULLUP = (1 << 8), 41 GPIO_PULLDOWN = (1 << 9), 42 }; 43 44 /* top 16 bits of the gpio flags are platform specific */ 45 #define GPIO_PLATFORM_MASK 0xffff0000 46 47 int gpio_config(unsigned nr, unsigned flags); 48 void gpio_set(unsigned nr, unsigned on); 49 int gpio_get(unsigned nr); 50 51