From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/auxdisplay/charlcd.h | 104 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 drivers/auxdisplay/charlcd.h (limited to 'drivers/auxdisplay/charlcd.h') diff --git a/drivers/auxdisplay/charlcd.h b/drivers/auxdisplay/charlcd.h new file mode 100644 index 0000000000..eed80063a6 --- /dev/null +++ b/drivers/auxdisplay/charlcd.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Character LCD driver for Linux + * + * Copyright (C) 2000-2008, Willy Tarreau + * Copyright (C) 2016-2017 Glider bvba + */ + +#ifndef _CHARLCD_H +#define _CHARLCD_H + +#define LCD_FLAG_B 0x0004 /* Blink on */ +#define LCD_FLAG_C 0x0008 /* Cursor on */ +#define LCD_FLAG_D 0x0010 /* Display on */ +#define LCD_FLAG_F 0x0020 /* Large font mode */ +#define LCD_FLAG_N 0x0040 /* 2-rows mode */ +#define LCD_FLAG_L 0x0080 /* Backlight enabled */ + +enum charlcd_onoff { + CHARLCD_OFF = 0, + CHARLCD_ON, +}; + +enum charlcd_shift_dir { + CHARLCD_SHIFT_LEFT, + CHARLCD_SHIFT_RIGHT, +}; + +enum charlcd_fontsize { + CHARLCD_FONTSIZE_SMALL, + CHARLCD_FONTSIZE_LARGE, +}; + +enum charlcd_lines { + CHARLCD_LINES_1, + CHARLCD_LINES_2, +}; + +struct charlcd { + const struct charlcd_ops *ops; + const unsigned char *char_conv; /* Optional */ + + int height; + int width; + + /* Contains the LCD X and Y offset */ + struct { + unsigned long x; + unsigned long y; + } addr; + + void *drvdata; +}; + +/** + * struct charlcd_ops - Functions used by charlcd. Drivers have to implement + * these. + * @backlight: Turn backlight on or off. Optional. + * @print: Print one character to the display at current cursor position. + * The buffered cursor position is advanced by charlcd. The cursor should not + * wrap to the next line at the end of a line. + * @gotoxy: Set cursor to x, y. The x and y values to set the cursor to are + * previously set in addr.x and addr.y by charlcd. + * @home: Set cursor to 0, 0. The values in addr.x and addr.y are set to 0, 0 by + * charlcd prior to calling this function. + * @clear_display: Clear the whole display and set the cursor to 0, 0. The + * values in addr.x and addr.y are set to 0, 0 by charlcd after to calling this + * function. + * @init_display: Initialize the display. + * @shift_cursor: Shift cursor left or right one position. + * @shift_display: Shift whole display content left or right. + * @display: Turn display on or off. + * @cursor: Turn cursor on or off. + * @blink: Turn cursor blink on or off. + * @lines: One or two lines. + * @redefine_char: Redefine the actual pixel matrix of character. + */ +struct charlcd_ops { + void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on); + int (*print)(struct charlcd *lcd, int c); + int (*gotoxy)(struct charlcd *lcd, unsigned int x, unsigned int y); + int (*home)(struct charlcd *lcd); + int (*clear_display)(struct charlcd *lcd); + int (*init_display)(struct charlcd *lcd); + int (*shift_cursor)(struct charlcd *lcd, enum charlcd_shift_dir dir); + int (*shift_display)(struct charlcd *lcd, enum charlcd_shift_dir dir); + int (*display)(struct charlcd *lcd, enum charlcd_onoff on); + int (*cursor)(struct charlcd *lcd, enum charlcd_onoff on); + int (*blink)(struct charlcd *lcd, enum charlcd_onoff on); + int (*fontsize)(struct charlcd *lcd, enum charlcd_fontsize size); + int (*lines)(struct charlcd *lcd, enum charlcd_lines lines); + int (*redefine_char)(struct charlcd *lcd, char *esc); +}; + +void charlcd_backlight(struct charlcd *lcd, enum charlcd_onoff on); +struct charlcd *charlcd_alloc(void); +void charlcd_free(struct charlcd *lcd); + +int charlcd_register(struct charlcd *lcd); +int charlcd_unregister(struct charlcd *lcd); + +void charlcd_poke(struct charlcd *lcd); + +#endif /* CHARLCD_H */ -- cgit v1.2.3