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/* $OpenBSD: lcd.c,v 1.1 2004/04/21 15:23:52 aoyama Exp $ */
/* $NetBSD: lcd.c,v 1.2 2000/01/07 05:13:08 nisimura Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* 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 by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
/* Taken from NetBSD/luna68k */
/*
* XXX
* Following code segments are subject to change.
* XXX
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#define PIO1_MODE_OUTPUT 0x84
#define PIO1_MODE_INPUT 0x94
#define POWER 0x10
#define ENABLE 0x80
#define DISABLE 0x00
#define WRITE_CMD (0x00 | 0x00)
#define WRITE_DATA (0x00 | 0x40)
#define READ_BUSY (0x20 | 0x00)
#define READ_DATA (0x20 | 0x40)
#define LCD_INIT 0x38
#define LCD_ENTRY 0x06
#define LCD_ON 0x0c
#define LCD_CLS 0x01
#define LCD_HOME 0x02
#define LCD_LOCATE(X, Y) (((Y) & 1 ? 0xc0 : 0x80) | ((X) & 0x0f))
struct pio {
volatile u_int8_t portA;
volatile unsigned : 24;
volatile u_int8_t portB;
volatile unsigned : 24;
volatile u_int8_t portC;
volatile unsigned : 24;
volatile u_int8_t cntrl;
volatile unsigned : 24;
};
void lcdbusywait(void);
void lcdput(int);
void lcdctrl(int);
void lcdshow(const char *);
void greeting(void);
/* "1234567890123456" */
static const char lcd_boot_message1[] = "OpenBSD/luna88k ";
static const char lcd_boot_message2[] = " SX-9100/DT ";
void
lcdbusywait()
{
struct pio *p1 = (struct pio *)0x4D000000;
int msb, s;
s = splhigh();
p1->cntrl = PIO1_MODE_INPUT;
p1->portC = POWER | READ_BUSY | ENABLE;
splx(s);
do {
msb = p1->portA & ENABLE;
delay(5);
} while (msb != 0);
s = splhigh();
p1->portC = POWER | READ_BUSY | DISABLE;
splx(s);
}
void
lcdput(cc)
int cc;
{
struct pio *p1 = (struct pio *)0x4D000000;
int s;
lcdbusywait();
s = splhigh();
p1->cntrl = PIO1_MODE_OUTPUT;
p1->portC = POWER | WRITE_DATA | ENABLE;
p1->portA = cc;
p1->portC = POWER | WRITE_DATA | DISABLE;
splx(s);
}
void
lcdctrl(cc)
int cc;
{
struct pio *p1 = (struct pio *)0x4D000000;
int s;
lcdbusywait();
s = splhigh();
p1->cntrl = PIO1_MODE_OUTPUT;
p1->portC = POWER | WRITE_CMD | ENABLE;
p1->portA = cc;
p1->portC = POWER | WRITE_CMD | DISABLE;
splx(s);
}
void
lcdshow(s)
const char *s;
{
int cc;
while ((cc = *s++) != '\0')
lcdput(cc);
}
void
greeting()
{
lcdctrl(LCD_INIT);
lcdctrl(LCD_ENTRY);
lcdctrl(LCD_ON);
lcdctrl(LCD_CLS);
lcdctrl(LCD_HOME);
lcdctrl(LCD_LOCATE(0, 0));
lcdshow(lcd_boot_message1);
lcdctrl(LCD_LOCATE(0, 1));
lcdshow(lcd_boot_message2);
}
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