pdsp188x.c
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/*
* Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com>
* Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <led-display.h>
#include <asm/io.h>
#ifdef CONFIG_CMD_DISPLAY
#define CWORD_CLEAR 0x80
#define CLEAR_DELAY (110 * 2)
#define DISPLAY_SIZE 8
static int pos; /* Current display position */
/* Handle different display commands */
void display_set(int cmd)
{
if (cmd & DISPLAY_CLEAR) {
out_8((unsigned char *)CONFIG_SYS_DISP_CWORD, CWORD_CLEAR);
udelay(1000 * CLEAR_DELAY);
}
if (cmd & DISPLAY_HOME) {
pos = 0;
}
}
/*
* Display a character at the current display position.
* Characters beyond the display size are ignored.
*/
int display_putc(char c)
{
if (pos >= DISPLAY_SIZE)
return -1;
out_8((unsigned char *)CONFIG_SYS_DISP_CHR_RAM + pos++, c);
return c;
}
#endif