1/*
 2 * Character LCD driver for Linux
 3 *
 4 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
 5 * Copyright (C) 2016-2017 Glider bvba
 6 *
 7 * This program is free software; you can redistribute it and/or
 8 * modify it under the terms of the GNU General Public License
 9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13struct charlcd {
14	const struct charlcd_ops *ops;
15	const unsigned char *char_conv;	/* Optional */
16
17	int ifwidth;			/* 4-bit or 8-bit (default) */
18	int height;
19	int width;
20	int bwidth;			/* Default set by charlcd_alloc() */
21	int hwidth;			/* Default set by charlcd_alloc() */
22
23	void *drvdata;			/* Set by charlcd_alloc() */
24};
25
26struct charlcd_ops {
27	/* Required */
28	void (*write_cmd)(struct charlcd *lcd, int cmd);
29	void (*write_data)(struct charlcd *lcd, int data);
30
31	/* Optional */
32	void (*write_cmd_raw4)(struct charlcd *lcd, int cmd);	/* 4-bit only */
33	void (*clear_fast)(struct charlcd *lcd);
34	void (*backlight)(struct charlcd *lcd, int on);
35};
36
37struct charlcd *charlcd_alloc(unsigned int drvdata_size);
38
39int charlcd_register(struct charlcd *lcd);
40int charlcd_unregister(struct charlcd *lcd);
41
42void charlcd_poke(struct charlcd *lcd);