cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

charlcd.h (3270B)

      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
     12#define LCD_FLAG_B		0x0004	/* Blink on */
     13#define LCD_FLAG_C		0x0008	/* Cursor on */
     14#define LCD_FLAG_D		0x0010	/* Display on */
     15#define LCD_FLAG_F		0x0020	/* Large font mode */
     16#define LCD_FLAG_N		0x0040	/* 2-rows mode */
     17#define LCD_FLAG_L		0x0080	/* Backlight enabled */
     18
     19enum charlcd_onoff {
     20	CHARLCD_OFF = 0,
     21	CHARLCD_ON,
     22};
     23
     24enum charlcd_shift_dir {
     25	CHARLCD_SHIFT_LEFT,
     26	CHARLCD_SHIFT_RIGHT,
     27};
     28
     29enum charlcd_fontsize {
     30	CHARLCD_FONTSIZE_SMALL,
     31	CHARLCD_FONTSIZE_LARGE,
     32};
     33
     34enum charlcd_lines {
     35	CHARLCD_LINES_1,
     36	CHARLCD_LINES_2,
     37};
     38
     39struct charlcd {
     40	const struct charlcd_ops *ops;
     41	const unsigned char *char_conv;	/* Optional */
     42
     43	int height;
     44	int width;
     45
     46	/* Contains the LCD X and Y offset */
     47	struct {
     48		unsigned long x;
     49		unsigned long y;
     50	} addr;
     51
     52	void *drvdata;
     53};
     54
     55/**
     56 * struct charlcd_ops - Functions used by charlcd. Drivers have to implement
     57 * these.
     58 * @backlight: Turn backlight on or off. Optional.
     59 * @print: Print one character to the display at current cursor position.
     60 * The buffered cursor position is advanced by charlcd. The cursor should not
     61 * wrap to the next line at the end of a line.
     62 * @gotoxy: Set cursor to x, y. The x and y values to set the cursor to are
     63 * previously set in addr.x and addr.y by charlcd.
     64 * @home: Set cursor to 0, 0. The values in addr.x and addr.y are set to 0, 0 by
     65 * charlcd prior to calling this function.
     66 * @clear_display: Clear the whole display and set the cursor to 0, 0. The
     67 * values in addr.x and addr.y are set to 0, 0 by charlcd after to calling this
     68 * function.
     69 * @init_display: Initialize the display.
     70 * @shift_cursor: Shift cursor left or right one position.
     71 * @shift_display: Shift whole display content left or right.
     72 * @display: Turn display on or off.
     73 * @cursor: Turn cursor on or off.
     74 * @blink: Turn cursor blink on or off.
     75 * @lines: One or two lines.
     76 * @redefine_char: Redefine the actual pixel matrix of character.
     77 */
     78struct charlcd_ops {
     79	void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on);
     80	int (*print)(struct charlcd *lcd, int c);
     81	int (*gotoxy)(struct charlcd *lcd, unsigned int x, unsigned int y);
     82	int (*home)(struct charlcd *lcd);
     83	int (*clear_display)(struct charlcd *lcd);
     84	int (*init_display)(struct charlcd *lcd);
     85	int (*shift_cursor)(struct charlcd *lcd, enum charlcd_shift_dir dir);
     86	int (*shift_display)(struct charlcd *lcd, enum charlcd_shift_dir dir);
     87	int (*display)(struct charlcd *lcd, enum charlcd_onoff on);
     88	int (*cursor)(struct charlcd *lcd, enum charlcd_onoff on);
     89	int (*blink)(struct charlcd *lcd, enum charlcd_onoff on);
     90	int (*fontsize)(struct charlcd *lcd, enum charlcd_fontsize size);
     91	int (*lines)(struct charlcd *lcd, enum charlcd_lines lines);
     92	int (*redefine_char)(struct charlcd *lcd, char *esc);
     93};
     94
     95void charlcd_backlight(struct charlcd *lcd, enum charlcd_onoff on);
     96struct charlcd *charlcd_alloc(void);
     97void charlcd_free(struct charlcd *lcd);
     98
     99int charlcd_register(struct charlcd *lcd);
    100int charlcd_unregister(struct charlcd *lcd);
    101
    102void charlcd_poke(struct charlcd *lcd);
    103
    104#endif /* CHARLCD_H */