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/* $NetBSD: promcons.c,v 1.13 1998/03/21 22:52:59 mycroft Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/cons.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <vm/vm_pageout.h>
#include <vm/vm_pager.h>
#include <machine/prom.h>
#define _PMAP_MAY_USE_PROM_CONSOLE /* XXX for now */
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
#define PROM_POLL_HZ 50
static d_open_t promopen;
static d_close_t promclose;
static struct cdevsw prom_cdevsw = {
.d_version = D_VERSION,
.d_open = promopen,
.d_close = promclose,
.d_name = "prom",
.d_flags = D_TTY | D_NEEDGIANT,
};
static int polltime;
static struct callout_handle promtimeouthandle
= CALLOUT_HANDLE_INITIALIZER(&promtimeouthandle);
void promstart(struct tty *);
void promtimeout(void *);
int promparam(struct tty *, struct termios *);
void promstop(struct tty *, int);
extern int promcons_dly_mkdev;
void promcons_delayed_makedev(void);
int
promopen(dev, flag, mode, td)
struct cdev *dev;
int flag, mode;
struct thread *td;
{
struct tty *tp;
int unit = minor(dev);
int s;
int error = 0, setuptimeout = 0;
if (pmap_uses_prom_console() == 0 || unit != 0)
return ENXIO;
tp = dev->si_tty = ttyalloc();
s = spltty();
tp->t_oproc = promstart;
tp->t_param = promparam;
tp->t_stop = promstop;
tp->t_dev = dev;
if ((tp->t_state & TS_ISOPEN) == 0) {
tp->t_state |= TS_CARR_ON;
ttyconsmode(tp, 0);
ttsetwater(tp);
setuptimeout = 1;
} else if ((tp->t_state & TS_XCLUDE) && suser(td)) {
splx(s);
return EBUSY;
}
splx(s);
error = ttyld_open(tp, dev);
if (error == 0 && setuptimeout) {
polltime = hz / PROM_POLL_HZ;
if (polltime < 1)
polltime = 1;
promtimeouthandle = timeout(promtimeout, tp, polltime);
}
return error;
}
int
promclose(dev, flag, mode, td)
struct cdev *dev;
int flag, mode;
struct thread *td;
{
int unit = minor(dev);
struct tty *tp = dev->si_tty;
if (unit != 0)
return ENXIO;
untimeout(promtimeout, tp, promtimeouthandle);
ttyld_close(tp, flag);
tty_close(tp);
return 0;
}
int
promparam(tp, t)
struct tty *tp;
struct termios *t;
{
return 0;
}
void
promstart(tp)
struct tty *tp;
{
int s;
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
ttwwakeup(tp);
splx(s);
return;
}
tp->t_state |= TS_BUSY;
while (tp->t_outq.c_cc != 0)
promcnputc(NULL, getc(&tp->t_outq));
tp->t_state &= ~TS_BUSY;
ttwwakeup(tp);
splx(s);
}
/*
* Stop output on a line.
*/
void
promstop(tp, flag)
struct tty *tp;
int flag;
{
int s;
s = spltty();
if (tp->t_state & TS_BUSY)
if ((tp->t_state & TS_TTSTOP) == 0)
tp->t_state |= TS_FLUSH;
splx(s);
}
void
promtimeout(v)
void *v;
{
struct tty *tp = v;
int c;
while ((c = promcncheckc(NULL)) != -1) {
if (tp->t_state & TS_ISOPEN)
ttyld_rint(tp, c);
}
promtimeouthandle = timeout(promtimeout, tp, polltime);
}
CONS_DRIVER(prom, NULL, NULL, NULL, promcngetc, promcncheckc, promcnputc, NULL);
static int promcn_attached = 0;
void
promcnattach(int alpha_console)
{
prom_consdev.cn_pri = CN_NORMAL;
sprintf(prom_consdev.cn_name, "promcons");
if (promcons_dly_mkdev)
promcons_dly_mkdev++;
else {
make_dev(&prom_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "promcons");
}
cnadd(&prom_consdev);
promcn_attached = 1;
}
void
promcons_delayed_makedev(void)
{
if (promcn_attached) {
make_dev(&prom_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "promcons");
}
}
void
promcndetach(void)
{
if (promcn_attached) {
cnremove(&prom_consdev);
promcn_attached = 0;
}
}
/*
* promcnputc, promcngetc and promchcheckc in prom.c for layering reasons
*/
#endif /* _PMAP_MAY_USE_PROM_CONSOLE */
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