1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Character LCD driver for Linux
 4 *
 5 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
 6 * Copyright (C) 2016-2017 Glider bvba
 7 */
 8
 9#ifndef _CHARLCD_H
10#define _CHARLCD_H
11
12struct charlcd {
13	const struct charlcd_ops *ops;
14	const unsigned char *char_conv;	/* Optional */
15
16	int ifwidth;			/* 4-bit or 8-bit (default) */
17	int height;
18	int width;
19	int bwidth;			/* Default set by charlcd_alloc() */
20	int hwidth;			/* Default set by charlcd_alloc() */
21
22	void *drvdata;			/* Set by charlcd_alloc() */
23};
24
25struct charlcd_ops {
26	/* Required */
27	void (*write_cmd)(struct charlcd *lcd, int cmd);
28	void (*write_data)(struct charlcd *lcd, int data);
29
30	/* Optional */
31	void (*write_cmd_raw4)(struct charlcd *lcd, int cmd);	/* 4-bit only */
32	void (*clear_fast)(struct charlcd *lcd);
33	void (*backlight)(struct charlcd *lcd, int on);
34};
35
36struct charlcd *charlcd_alloc(unsigned int drvdata_size);
37void charlcd_free(struct charlcd *lcd);
38
39int charlcd_register(struct charlcd *lcd);
40int charlcd_unregister(struct charlcd *lcd);
41
42void charlcd_poke(struct charlcd *lcd);
43
44#endif /* CHARLCD_H */