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104 lines
3.2 KiB
104 lines
3.2 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Character LCD driver for Linux |
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* |
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* Copyright (C) 2000-2008, Willy Tarreau <[email protected]> |
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* Copyright (C) 2016-2017 Glider bvba |
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*/ |
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#ifndef _CHARLCD_H |
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#define _CHARLCD_H |
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#define LCD_FLAG_B 0x0004 /* Blink on */ |
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#define LCD_FLAG_C 0x0008 /* Cursor on */ |
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#define LCD_FLAG_D 0x0010 /* Display on */ |
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#define LCD_FLAG_F 0x0020 /* Large font mode */ |
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#define LCD_FLAG_N 0x0040 /* 2-rows mode */ |
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#define LCD_FLAG_L 0x0080 /* Backlight enabled */ |
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enum charlcd_onoff { |
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CHARLCD_OFF = 0, |
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CHARLCD_ON, |
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}; |
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enum charlcd_shift_dir { |
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CHARLCD_SHIFT_LEFT, |
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CHARLCD_SHIFT_RIGHT, |
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}; |
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enum charlcd_fontsize { |
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CHARLCD_FONTSIZE_SMALL, |
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CHARLCD_FONTSIZE_LARGE, |
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}; |
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enum charlcd_lines { |
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CHARLCD_LINES_1, |
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CHARLCD_LINES_2, |
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}; |
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struct charlcd { |
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const struct charlcd_ops *ops; |
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const unsigned char *char_conv; /* Optional */ |
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int height; |
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int width; |
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/* Contains the LCD X and Y offset */ |
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struct { |
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unsigned long x; |
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unsigned long y; |
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} addr; |
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void *drvdata; |
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}; |
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/** |
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* struct charlcd_ops - Functions used by charlcd. Drivers have to implement |
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* these. |
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* @backlight: Turn backlight on or off. Optional. |
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* @print: Print one character to the display at current cursor position. |
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* The buffered cursor position is advanced by charlcd. The cursor should not |
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* wrap to the next line at the end of a line. |
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* @gotoxy: Set cursor to x, y. The x and y values to set the cursor to are |
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* previously set in addr.x and addr.y by charlcd. |
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* @home: Set cursor to 0, 0. The values in addr.x and addr.y are set to 0, 0 by |
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* charlcd prior to calling this function. |
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* @clear_display: Clear the whole display and set the cursor to 0, 0. The |
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* values in addr.x and addr.y are set to 0, 0 by charlcd after to calling this |
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* function. |
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* @init_display: Initialize the display. |
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* @shift_cursor: Shift cursor left or right one position. |
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* @shift_display: Shift whole display content left or right. |
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* @display: Turn display on or off. |
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* @cursor: Turn cursor on or off. |
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* @blink: Turn cursor blink on or off. |
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* @lines: One or two lines. |
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* @redefine_char: Redefine the actual pixel matrix of character. |
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*/ |
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struct charlcd_ops { |
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void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on); |
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int (*print)(struct charlcd *lcd, int c); |
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int (*gotoxy)(struct charlcd *lcd, unsigned int x, unsigned int y); |
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int (*home)(struct charlcd *lcd); |
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int (*clear_display)(struct charlcd *lcd); |
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int (*init_display)(struct charlcd *lcd); |
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int (*shift_cursor)(struct charlcd *lcd, enum charlcd_shift_dir dir); |
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int (*shift_display)(struct charlcd *lcd, enum charlcd_shift_dir dir); |
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int (*display)(struct charlcd *lcd, enum charlcd_onoff on); |
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int (*cursor)(struct charlcd *lcd, enum charlcd_onoff on); |
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int (*blink)(struct charlcd *lcd, enum charlcd_onoff on); |
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int (*fontsize)(struct charlcd *lcd, enum charlcd_fontsize size); |
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int (*lines)(struct charlcd *lcd, enum charlcd_lines lines); |
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int (*redefine_char)(struct charlcd *lcd, char *esc); |
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}; |
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void charlcd_backlight(struct charlcd *lcd, enum charlcd_onoff on); |
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struct charlcd *charlcd_alloc(void); |
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void charlcd_free(struct charlcd *lcd); |
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int charlcd_register(struct charlcd *lcd); |
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int charlcd_unregister(struct charlcd *lcd); |
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void charlcd_poke(struct charlcd *lcd); |
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#endif /* CHARLCD_H */
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