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/*
* Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com>
* Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#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
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