2 * Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com>
3 * Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com>
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <led-display.h>
12 #ifdef CONFIG_CMD_DISPLAY
13 #define CWORD_CLEAR 0x80
14 #define CLEAR_DELAY (110 * 2)
15 #define DISPLAY_SIZE 8
17 static int pos; /* Current display position */
19 /* Handle different display commands */
20 void display_set(int cmd)
22 if (cmd & DISPLAY_CLEAR) {
23 out_8((unsigned char *)CONFIG_SYS_DISP_CWORD, CWORD_CLEAR);
24 udelay(1000 * CLEAR_DELAY);
27 if (cmd & DISPLAY_HOME) {
33 * Display a character at the current display position.
34 * Characters beyond the display size are ignored.
36 int display_putc(char c)
38 if (pos >= DISPLAY_SIZE)
41 out_8((unsigned char *)CONFIG_SYS_DISP_CHR_RAM + pos++, c);