/* $OpenBSD: lcd.c,v 1.3 2007/02/09 14:26:09 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <machine/autoconf.h>
#include <machine/conf.h>
#include <machine/lcd.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))
#define LCD_MAXBUFLEN 80
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;
};
/* Autoconf stuff */
int lcd_match(struct device *, void *, void *);
void lcd_attach(struct device *, struct device *, void *);
struct lcd_softc {
struct device sc_dev;
int sc_opened;
};
struct cfattach lcd_ca = {
sizeof(struct lcd_softc), lcd_match, lcd_attach
};
struct cfdriver lcd_cd = {
NULL, "lcd", DV_DULL, 0
};
/* Internal prototypes */
void lcdbusywait(void);
void lcdput(int);
void lcdctrl(int);
void lcdshow(const char *);
void greeting(void);
/* Internal variables */
/* "1234567890123456" */
static const char lcd_boot_message1[] = "OpenBSD/luna88k ";
static const char lcd_boot_message2[] = " SX-9100/DT ";
/*
* Autoconf functions
*/
int
lcd_match(parent, cf, aux)
struct device *parent;
void *cf, *aux;
{
struct mainbus_attach_args *ma = aux;
if (strcmp(ma->ma_name, lcd_cd.cd_name))
return 0;
if (badaddr((vaddr_t)ma->ma_addr, 4))
return 0;
return 1;
}
void
lcd_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
printf("\n");
/* Say hello to the world on LCD. */
greeting();
}
/*
* open/close/write/ioctl
*/
int
lcdopen(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = minor(dev);
struct lcd_softc *sc;
if (unit >= lcd_cd.cd_ndevs)
return ENXIO;
if ((sc = lcd_cd.cd_devs[unit]) == NULL)
return ENXIO;
if (sc->sc_opened)
return EBUSY;
sc->sc_opened = 1;
return 0;
}
int
lcdclose(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = minor(dev);
struct lcd_softc *sc;
sc = lcd_cd.cd_devs[unit];
sc->sc_opened = 0;
return 0;
}
int
lcdwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int error, len;
int i, n;
char buf[LCD_MAXBUFLEN];
len = n = uio->uio_resid;
if ((len < 0) || (len > LCD_MAXBUFLEN))
return EIO;
while (n > 0) {
error = uiomove(buf, n, uio);
if (error)
return EIO;
n = uio->uio_resid;
}
for(i = 0; i < len; i++) {
lcdput((int)buf[i]);
}
return 0;
}
int
lcdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
int val;
/* check if the device opened with write mode */
switch(cmd) {
case LCDCLS:
case LCDHOME:
case LCDMODE:
case LCDDISP:
case LCDMOVE:
case LCDSEEK:
case LCDRESTORE:
if ((flag & FWRITE) == 0)
return EACCES;
break;
}
switch(cmd) {
case LCDCLS:
lcdctrl(LCD_CLS);
break;
case LCDHOME:
lcdctrl(LCD_HOME);
break;
case LCDMODE:
val = *(int *)addr;
switch (val) {
case LCDMODE_C_LEFT:
case LCDMODE_C_RIGHT:
case LCDMODE_D_LEFT:
case LCDMODE_D_RIGHT:
lcdctrl(val);
break;
default:
return EINVAL;
}
break;
case LCDDISP:
val = *(int *)addr;
if ((val & 0x7) != val)
return EINVAL;
lcdctrl(val | 0x8);
break;
case LCDMOVE:
val = *(int *)addr;
switch (val) {
case LCDMOVE_C_LEFT:
case LCDMOVE_C_RIGHT:
case LCDMOVE_D_LEFT:
case LCDMOVE_D_RIGHT:
lcdctrl(val);
break;
default:
return EINVAL;
}
break;
case LCDSEEK:
val = *(int *)addr & 0x7f;
lcdctrl(val | 0x80);
break;
case LCDRESTORE:
greeting();
break;
default:
return ENOTTY;
}
return 0;
}
/*
* Internal functions
*/
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);
}