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/* Copyright 2020 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* LCD driver for I2C LCD 2004.
*/
#ifndef __CROS_EC_LCD_H
#define __CROS_EC_LCD_H
#include "common.h"
/* commands */
#define LCD_CLEAR_DISPLAY BIT(0)
#define LCD_RETURN_HOME BIT(1)
#define LCD_ENTRYMODE_SET BIT(2)
#define LCD_DISPLAY_CONTROL BIT(3)
#define LCD_CURSOR_SHIFT BIT(4)
#define LCD_FUNCTION_SET BIT(5)
#define LCD_SET_CGRAMADDR BIT(6)
#define LCD_SET_DDRAMADDR BIT(7)
/* flags for display entry mode */
#define LCD_ENTRY_RIGHT 0x00
#define LCD_ENTRY_LEFT BIT(1)
#define LCD_ENTRY_SHIFT_INCREMENT BIT(0)
#define LCD_ENTRY_SHIFT_DECREMENT 0x00
/* flags for display on/off control */
#define LCD_DISPLAY_ON BIT(2)
#define LCD_DISPLAY_OFF 0x00
#define LCD_CURSOR_ON BIT(1)
#define LCD_CURSOR_OFF 0x00
#define LCD_BLINK_ON BIT(0)
#define LCD_BLINK_OFF 0x00
/* flags for display/cursor shift */
#define LCD_DISPLAY_MOVE BIT(3)
#define LCD_CURSOR_MOVE 0x00
#define LCD_MOVE_RIGHT BIT(2)
#define LCD_MOVE_LEFT 0x00
/* flags for function set */
#define LCD_8BITMODE BIT(4)
#define LCD_4BITMODE 0x00
#define LCD_2LINE BIT(3)
#define LCD_1LINE 0x00
#define LCD_5X10DOTS BIT(2)
#define LCD_5X8DOTS 0x00
/* flags for backlight control */
#define LCD_BACKLIGHT BIT(3)
#define LCD_NO_BACKLIGHT 0x00
#define LCD_EN BIT(2) /* Enable bit */
#define LCD_RW BIT(1) /* Read/Write bit */
#define LCD_RS BIT(0) /* Register select bit */
void lcd_init(uint8_t cols, uint8_t rows, uint8_t dotsize);
void lcd_set_cursor(uint8_t col, uint8_t row);
void lcd_set_char(char data);
void lcd_print_string(const char *str);
void lcd_clear(void);
void lcd_enable_display(void);
void lcd_disable_display(void);
void lcd_enable_backlight(void);
void lcd_disable_backlight(void);
#endif /*__CROS_EC_LCD_H */
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