1 /* 2 * Generic GPIO ops 3 * 4 * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22 * IN THE SOFTWARE. 23 * 24 * This is like an abstract class for gpio, a real implementation provides 25 * functions for the ops that use the underlying OS gpio arrangements. 26 */ 27 28 #if !defined(__LWS_GPIO_H__) 29 #define __LWS_GPIO_H__ 30 31 typedef int _lws_plat_gpio_t; 32 33 typedef enum { 34 LWSGGPIO_IRQ_NONE, 35 LWSGGPIO_IRQ_RISING, 36 LWSGGPIO_IRQ_FALLING, 37 LWSGGPIO_IRQ_CHANGE, 38 LWSGGPIO_IRQ_LOW, 39 LWSGGPIO_IRQ_HIGH 40 } lws_gpio_irq_t; 41 42 enum { 43 LWSGGPIO_FL_READ = (1 << 0), 44 LWSGGPIO_FL_WRITE = (1 << 1), 45 LWSGGPIO_FL_PULLUP = (1 << 2), 46 LWSGGPIO_FL_PULLDOWN = (1 << 3), 47 LWSGGPIO_FL_START_LOW = (1 << 4), 48 }; 49 50 typedef void (*lws_gpio_irq_cb_t)(void *arg); 51 52 typedef struct lws_gpio_ops { 53 void (*mode)(_lws_plat_gpio_t gpio, int flags); 54 int (*read)(_lws_plat_gpio_t gpio); 55 void (*set)(_lws_plat_gpio_t gpio, int val); 56 int (*irq_mode)(_lws_plat_gpio_t gpio, lws_gpio_irq_t irq, 57 lws_gpio_irq_cb_t cb, void *arg); 58 } lws_gpio_ops_t; 59 60 #endif 61