1/*
2 * Generic I2C 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 i2c, a real implementation provides
25 * functions for the ops that use the underlying OS arrangements.
26 */
27
28#if !defined(__LWS_I2C_H__)
29#define __LWS_I2C_H__
30
31#include <stdint.h>
32#include <stddef.h>
33
34typedef struct lws_i2c_ops {
35 int (*init)(const struct lws_i2c_ops *ctx);
36 int (*start)(const struct lws_i2c_ops *ctx);
37 void (*stop)(const struct lws_i2c_ops *ctx);
38 int (*write)(const struct lws_i2c_ops *ctx, uint8_t data);
39 int (*read)(const struct lws_i2c_ops *ctx);
40 void (*set_ack)(const struct lws_i2c_ops *octx, int ack);
41} lws_i2c_ops_t;
42
43/*
44 * These are implemented by calling the ops above, and so are generic
45 */
46
47LWS_VISIBLE LWS_EXTERN int
48lws_i2c_command(const lws_i2c_ops_t *ctx, uint8_t ads7, uint8_t c);
49
50LWS_VISIBLE LWS_EXTERN int
51lws_i2c_command_list(const lws_i2c_ops_t *ctx, uint8_t ads7, const uint8_t *buf,
52 size_t len);
53
54#endif
55