[thirdparty/linux.git] / include / misc / charlcd.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Character LCD driver for Linux
 *
 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
 * Copyright (C) 2016-2017 Glider bvba
 */

struct charlcd {
	const struct charlcd_ops *ops;
	const unsigned char *char_conv;	/* Optional */

	int ifwidth;			/* 4-bit or 8-bit (default) */
	int height;
	int width;
	int bwidth;			/* Default set by charlcd_alloc() */
	int hwidth;			/* Default set by charlcd_alloc() */

	void *drvdata;			/* Set by charlcd_alloc() */
};

struct charlcd_ops {
	/* Required */
	void (*write_cmd)(struct charlcd *lcd, int cmd);
	void (*write_data)(struct charlcd *lcd, int data);

	/* Optional */
	void (*write_cmd_raw4)(struct charlcd *lcd, int cmd);	/* 4-bit only */
	void (*clear_fast)(struct charlcd *lcd);
	void (*backlight)(struct charlcd *lcd, int on);
};

struct charlcd *charlcd_alloc(unsigned int drvdata_size);
void charlcd_free(struct charlcd *lcd);

int charlcd_register(struct charlcd *lcd);
int charlcd_unregister(struct charlcd *lcd);

void charlcd_poke(struct charlcd *lcd);
Commit	Line	Data
	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	struct charlcd {
	10	const struct charlcd_ops *ops;
	11	const unsigned char char_conv; / Optional */
	12
	13	int ifwidth; /* 4-bit or 8-bit (default) */
	14	int height;
	15	int width;
	16	int bwidth; /* Default set by charlcd_alloc() */
	17	int hwidth; /* Default set by charlcd_alloc() */
	18
	19	void drvdata; / Set by charlcd_alloc() */
	20	};
	21
	22	struct charlcd_ops {
	23	/* Required */
	24	void (write_cmd)(struct charlcd lcd, int cmd);
	25	void (write_data)(struct charlcd lcd, int data);
	26
	27	/* Optional */
	28	void (write_cmd_raw4)(struct charlcd lcd, int cmd); /* 4-bit only */
	29	void (clear_fast)(struct charlcd lcd);
	30	void (backlight)(struct charlcd lcd, int on);
	31	};
	32
	33	struct charlcd *charlcd_alloc(unsigned int drvdata_size);
	34	void charlcd_free(struct charlcd *lcd);
	35
	36	int charlcd_register(struct charlcd *lcd);
	37	int charlcd_unregister(struct charlcd *lcd);
	38
	39	void charlcd_poke(struct charlcd *lcd);