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NetBSD/sys/dev/hpc/biconsdev.c
jdolecek e0cc03a09b merge kqueue branch into -current 
kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
2002-10-23 09:10:23 +00:00

254 lines
7.5 KiB
C
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/* $NetBSD: biconsdev.c,v 1.7 2002/10/23 09:13:11 jdolecek Exp $ */
/*-
* Copyright (c) 1999-2001
* Shin Takemura and PocketBSD Project. 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 the PocketBSD project
* and its contributors.
* 4. Neither the name of the project 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 REGENTS 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 REGENTS 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.
*
*/
/*
* Copyright (c) 1995
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ted Lemon.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: biconsdev.c,v 1.7 2002/10/23 09:13:11 jdolecek Exp $");
#include "biconsdev.h"
#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/conf.h>
#include <dev/cons.h>
#include <dev/hpc/bicons.h>
#include <dev/hpc/biconsvar.h>
struct tty biconsdev_tty[NBICONSDEV];
void biconsdevattach(int);
static void biconsdev_output(struct tty *);
dev_type_open(biconsdevopen);
dev_type_close(biconsdevclose);
dev_type_read(biconsdevread);
dev_type_write(biconsdevwrite);
dev_type_ioctl(biconsdevioctl);
dev_type_tty(biconsdevtty);
dev_type_poll(biconsdevpoll);
const struct cdevsw biconsdev_cdevsw = {
biconsdevopen, biconsdevclose, biconsdevread, biconsdevwrite,
biconsdevioctl, nostop, biconsdevtty, biconsdevpoll, nommap,
ttykqfilter, D_TTY
};
void
biconsdevattach(int n)
{
struct tty *tp = &biconsdev_tty[0];
int maj;
/* locate the major number */
maj = cdevsw_lookup_major(&biconsdev_cdevsw);
/* Set up the tty queues now... */
clalloc(&tp->t_rawq, 1024, 1);
clalloc(&tp->t_canq, 1024, 1);
/* output queue doesn't need quoting */
clalloc(&tp->t_outq, 1024, 0);
/* Set default line discipline. */
tp->t_linesw = linesw[0];
tp->t_dev = makedev(maj, 0);
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
tp->t_param = (int (*)(struct tty *, struct termios *))nullop;
tp->t_winsize.ws_row = bicons_height;
tp->t_winsize.ws_col = bicons_width;
tp->t_winsize.ws_xpixel = bicons_xpixel;
tp->t_winsize.ws_ypixel = bicons_ypixel;
tp->t_oproc = biconsdev_output;
}
static void
biconsdev_output(struct tty *tp)
{
int s, n;
char buf[OBUFSIZ];
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
splx(s);
return;
}
tp->t_state |= TS_BUSY;
splx(s);
n = q_to_b(&tp->t_outq, buf, sizeof(buf));
bicons_putn(buf, n);
s = spltty();
tp->t_state &= ~TS_BUSY;
/* Come back if there's more to do */
if (tp->t_outq.c_cc) {
tp->t_state |= TS_TIMEOUT;
callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, tp);
}
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);
}
splx(s);
}
int
biconsdevopen(dev_t dev, int flag, int mode, struct proc *p)
{
struct tty *tp = &biconsdev_tty[0];
int status;
if ((tp->t_state & TS_ISOPEN) == 0) {
/*
* Leave baud rate alone!
*/
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_state = TS_ISOPEN | TS_CARR_ON;
(void)(*tp->t_param)(tp, &tp->t_termios);
ttsetwater(tp);
} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
return (EBUSY);
status = (*tp->t_linesw->l_open)(dev, tp);
return status;
}
int
biconsdevclose(dev_t dev, int flag, int mode, struct proc *p)
{
struct tty *tp = &biconsdev_tty[0];
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
return (0);
}
int
biconsdevread(dev_t dev, struct uio *uio, int flag)
{
struct tty *tp = &biconsdev_tty[0];
return ((*tp->t_linesw->l_read)(tp, uio, flag));
}
int
biconsdevwrite(dev_t dev, struct uio *uio, int flag)
{
struct tty *tp = &biconsdev_tty[0];
return ((*tp->t_linesw->l_write)(tp, uio, flag));
}
int
biconsdevpoll(dev_t dev, int events, struct proc *p)
{
struct tty *tp = &biconsdev_tty[0];
return ((*tp->t_linesw->l_poll)(tp, events, p));
}
struct tty *
biconsdevtty(dev_t dev)
{
struct tty *tp = &biconsdev_tty[0];
return (tp);
}
int
biconsdevioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
{
struct tty *tp = &biconsdev_tty[0];
int error;
if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, p)) !=
EPASSTHROUGH)
return (error);
return (ttioctl(tp, cmd, data, flag, p));
}
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