* Copyright (c) 2001, 2002 Wasabi Systems, Inc.

/* $NetBSD: brh_7seg.c,v 1.6 2012/11/12 18:00:38 skrll Exp $ */

/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* Support for the 7-segment display on the ADI Engineering BRH board.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: brh_7seg.c,v 1.6 2012/11/12 18:00:38 skrll Exp $");

#include <sys/param.h>
#include <sys/systm.h>

#include <sys/bus.h>

#include <evbarm/adi_brh/brhreg.h>
#include <evbarm/adi_brh/brhvar.h>

#define WRITE(x, v) *((volatile uint8_t *) (x)) = (v)

static int snakestate;

static const uint8_t digitmap[] = {
/* +#####+
* # #
* # #
* # #
* +-----+
* # #
* # #
* # #
* +#####+
*/
SEG_G,

/* +-----+
* | #
* | #
* | #
* +-----+
* | #
* | #
* | #
* +-----+
*/
SEG_A|SEG_D|SEG_E|SEG_F|SEG_G,

/* +#####+
* | #
* | #
* | #
* +#####+
* # |
* # |
* # |
* +#####+
*/
SEG_C|SEG_F,

/* +#####+
* | #
* | #
* | #
* +#####+
* | #
* | #
* | #
* +#####+
*/
SEG_E|SEG_F,

/* +-----+
* # #
* # #
* # #
* +#####+
* | #
* | #
* | #
* +-----+
*/
SEG_A|SEG_D|SEG_E,

/* +#####+
* # |
* # |
* # |
* +#####+
* | #
* | #
* | #
* +#####+
*/
SEG_B|SEG_E,

/* +#####+
* # |
* # |
* # |
* +#####+
* # #
* # #
* # #
* +#####+
*/
SEG_B,

/* +#####+
* | #
* | #
* | #
* +-----+
* | #
* | #
* | #
* +-----+
*/
SEG_D|SEG_E|SEG_F,

/* +#####+
* # #
* # #
* # #
* +#####+
* # #
* # #
* # #
* +#####+
*/
0,

/* +#####+
* # #
* # #
* # #
* +#####+
* | #
* | #
* | #
* +-----+
*/
SEG_D|SEG_E,
};

static uint8_t
brh_7seg_xlate(char c)
{
uint8_t rv;

if (c >= '0' && c <= '9')
rv = digitmap[c - '0'];
else if (c == '.')
rv = (uint8_t) ~SEG_DP;
else
rv = 0xff;

return (rv);
}

void
brh_7seg(char a)
{
uint8_t ch;

ch = brh_7seg_xlate(a);

snakestate = 0;

WRITE(BRH_LED_VBASE, ch);
}

static const uint8_t snakemap[] = {

/* +#####+
* | |
* | |
* | |
* +-----+
* | |
* | |
* | |
* +-----+
*/
~SEG_A,

/* +-----+
* # |
* # |
* # |
* +-----+
* | |
* | |
* | |
* +-----+
*/
~SEG_F,

/* +-----+
* | |
* | |
* | |
* +#####+
* | |
* | |
* | |
* +-----+
*/
~SEG_G,

/* +-----+
* | |
* | |
* | |
* +-----+
* | #
* | #
* | #
* +-----+
*/
~SEG_C,

/* +-----+
* | |
* | |
* | |
* +-----+
* | |
* | |
* | |
* +#####+
*/
~SEG_D,

/* +-----+
* | |
* | |
* | |
* +-----+
* # |
* # |
* # |
* +-----+
*/
~SEG_E,

/* +-----+
* | |
* | |
* | |
* +#####+
* | |
* | |
* | |
* +-----+
*/
~SEG_G,

/* +-----+
* | #
* | #
* | #
* +-----+
* | |
* | |
* | |
* +-----+
*/
~SEG_B,
};

void
brh_7seg_snake(void)
{
int cur = snakestate;

WRITE(BRH_LED_VBASE, snakemap[cur]);

snakestate = (cur + 1) & 7;
}