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
31typedef int _lws_plat_gpio_t;
32
33typedef 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
42enum {
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
50typedef void (*lws_gpio_irq_cb_t)(void *arg);
51
52typedef 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