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NetBSD/sys/arch/sun3/dev/prom.c

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/* $NetBSD: prom.c,v 1.14 1994/11/21 21:31:17 gwr Exp $ */
/*
* Copyright (c) 1993 Adam Glass
* All rights reserved.
*
* 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 Adam Glass.
* 4. The name of the Author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Adam Glass ``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 Adam Glass 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/proc.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/mon.h>
#include <dev/cons.h>
#include "../sun3/interreg.h"
/*
* cleanup:
* get autoconfiguration right, right style
* not a true serial driver but a tty driver, i.e no carrier
* make sure start is non-blocking
* add read support via timeouts
*/
void promattach __P((struct device *, struct device *, void *));
struct prom_softc {
struct device sc_dev;
int sc_flags;
int sc_nopen;
struct tty *sc_tty;
};
struct cfdriver promcd =
{ NULL, "prom", always_match, promattach, DV_TTY,
sizeof(struct prom_softc), 0};
#define PROM_CHECK(unit) \
if (unit >= promcd.cd_ndevs || (promcd.cd_devs[unit] == NULL)) \
return ENXIO
#define UNIT_TO_PROM_SC(unit) promcd.cd_devs[unit]
#ifndef PROM_RECEIVE_FREQ
#define PROM_RECEIVE_FREQ 10
#endif
int promopen __P((dev_t, int, int, struct proc *));
int promclose __P((dev_t, int, int, struct proc *));
int promread __P((dev_t, struct uio *, int));
int promwrite __P((dev_t, struct uio *, int));
int promioctl __P((dev_t, int, caddr_t, int, struct proc *));
int promstop __P((struct tty *, int));
static int promparam __P((struct tty *, struct termios *));
static void promstart __P((struct tty *));
static void promreceive __P((caddr_t));
void promattach(parent, self, args)
struct device *parent;
struct device *self;
void *args;
{
printf("\n");
}
int promopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct tty *tp;
struct prom_softc *prom_sc;
int unit, s, result;
unit = minor(dev);
PROM_CHECK(unit);
prom_sc = UNIT_TO_PROM_SC(unit);
if (prom_sc->sc_tty == NULL)
tp = prom_sc->sc_tty = ttymalloc();
else
tp = prom_sc->sc_tty;
tp->t_addr = (caddr_t) tp;
tp->t_oproc = promstart;
tp->t_param = promparam;
tp->t_dev = dev;
if ((tp->t_state & TS_ISOPEN) == 0) {
tp->t_state |= TS_WOPEN;
ttychars(tp);
if (tp->t_ispeed == 0) {
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
}
promparam(tp, &tp->t_termios);
ttsetwater(tp);
}
else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
return EBUSY;
tp->t_state |= TS_CARR_ON;
result = (*linesw[tp->t_line].l_open)(dev, tp);
if (result)
return result;
timeout((timeout_t) promreceive, (caddr_t) tp, hz/PROM_RECEIVE_FREQ);
return 0;
}
promclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct tty *tp;
int unit;
struct prom_softc *prom_sc;
unit = minor(dev);
prom_sc = UNIT_TO_PROM_SC(unit);
tp = prom_sc->sc_tty;
(*linesw[tp->t_line].l_close)(tp, flag);
return ttyclose(tp);
}
promread(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
int unit;
register struct tty *tp;
struct prom_softc *prom_sc;
unit = minor(dev);
prom_sc = UNIT_TO_PROM_SC(unit);
tp = prom_sc->sc_tty;
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
promwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
int unit;
register struct tty *tp;
struct prom_softc *prom_sc;
unit = minor(dev);
prom_sc = UNIT_TO_PROM_SC(unit);
tp = prom_sc->sc_tty;
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
int promioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit;
register struct tty *tp;
struct prom_softc *prom_sc;
int error;
unit = minor(dev);
prom_sc = UNIT_TO_PROM_SC(unit);
tp = prom_sc->sc_tty;
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return error;
error = ttioctl(tp, cmd, data, flag, p);
if (error >= 0)
return error;
return ENOTTY;
}
void promstart(tp)
struct tty *tp;
{
int s, c, count;
u_char outbuf[50];
u_char *bufp;
s = spltty();
if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT)) goto out;
tp->t_state |= TS_BUSY;
if (tp->t_outq.c_cc <= tp->t_lowat) {
if (tp->t_state & TS_ASLEEP) {
tp->t_state &=~ TS_ASLEEP;
wakeup((caddr_t)&tp->t_outq);
}
selwakeup(&tp->t_wsel);
}
count = q_to_b(&tp->t_outq, outbuf, 49);
if (count) {
outbuf[count] = '\0';
(void) splhigh();
mon_printf("%s", outbuf);
(void) spltty();
}
tp->t_state &= ~TS_BUSY;
out:
splx(s);
}
static int promparam(tp, t)
struct tty *tp;
struct termios *t;
{
struct prom_softc *prom_sc;
if (!t->c_ispeed || (t->c_ispeed != t->c_ospeed))
return EINVAL;
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
return 0;
}
static void promreceive(arg)
caddr_t arg;
{
struct tty *tp;
int c, s;
tp = (struct tty *) arg;
s = spltty();
if (tp->t_state & TS_ISOPEN) {
if ((tp->t_state & TS_BUSY) == 0) {
extern unsigned int orig_nmi_vector;
extern int nmi_intr();
set_clk_mode(0,IREG_CLOCK_ENAB_7|IREG_CLOCK_ENAB_5,0);
isr_add_custom(7, orig_nmi_vector);
set_clk_mode(IREG_CLOCK_ENAB_7,0,1);
c = mon_may_getchar();
set_clk_mode(0,IREG_CLOCK_ENAB_7|IREG_CLOCK_ENAB_5,0);
isr_add_custom(7, nmi_intr);
set_clk_mode(IREG_CLOCK_ENAB_5,0,1);
if (c != -1) {
(*linesw[tp->t_line].l_rint)(c, tp);
}
}
timeout((timeout_t) promreceive, (caddr_t) tp, hz/PROM_RECEIVE_FREQ);
}
splx(s);
}
/* prom console support */
promcnprobe(cp)
struct consdev *cp;
{
int prommajor;
/* locate the major number */
for (prommajor = 0; prommajor < nchrdev; prommajor++)
if (cdevsw[prommajor].d_open == promopen)
break;
cp->cn_dev = makedev(prommajor, 0);
cp->cn_pri = CN_INTERNAL; /* will always exist but you don't
* want to use it unless you have to
*/
}
promcninit(cp)
struct consdev *cp;
{
mon_printf("console on prom0\n");
}
promcngetc(dev)
dev_t dev;
{
mon_printf("not sure how to do promcngetc() yet\n");
}
/*
* Console kernel output character routine.
*/
promcnputc(dev, c)
dev_t dev;
int c;
{
int s;
s = splhigh();
if (minor(dev) != 0)
mon_printf("non unit 0 prom console???\n");
mon_putchar(c);
splx(s);
}
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