31144d9976
indicating an unhandled "command". ERESTART is -1, which can lead to confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been placed at -4. No ioctl code should now return -1 anywhere. The ioctl() system call is now properly restartable.
250 lines
7.2 KiB
C
250 lines
7.2 KiB
C
/* $NetBSD: biconsdev.c,v 1.5 2002/03/17 19:40:55 atatat Exp $ */
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/*-
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* Copyright (c) 1999-2001
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* Shin Takemura and PocketBSD Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the PocketBSD project
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* and its contributors.
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* 4. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* Copyright (c) 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ted Lemon.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: biconsdev.c,v 1.5 2002/03/17 19:40:55 atatat Exp $");
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#include "biconsdev.h"
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/conf.h>
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#include <dev/cons.h>
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#include <dev/hpc/bicons.h>
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#include <dev/hpc/biconsvar.h>
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struct tty biconsdev_tty[NBICONSDEV];
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void biconsdevattach(int);
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static void biconsdev_output(struct tty *);
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cdev_decl(biconsdev);
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void
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biconsdevattach(int n)
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{
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struct tty *tp = &biconsdev_tty[0];
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int maj;
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/* locate the major number */
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for (maj = 0; maj < nchrdev; maj++)
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if (cdevsw[maj].d_open == biconsdevopen)
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break;
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/* Set up the tty queues now... */
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clalloc(&tp->t_rawq, 1024, 1);
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clalloc(&tp->t_canq, 1024, 1);
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/* output queue doesn't need quoting */
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clalloc(&tp->t_outq, 1024, 0);
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/* Set default line discipline. */
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tp->t_linesw = linesw[0];
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tp->t_dev = makedev(maj, 0);
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tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
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tp->t_param = (int (*)(struct tty *, struct termios *))nullop;
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tp->t_winsize.ws_row = bicons_height;
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tp->t_winsize.ws_col = bicons_width;
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tp->t_winsize.ws_xpixel = bicons_xpixel;
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tp->t_winsize.ws_ypixel = bicons_ypixel;
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tp->t_oproc = biconsdev_output;
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}
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static void
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biconsdev_output(struct tty *tp)
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{
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int s, n;
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char buf[OBUFSIZ];
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s = spltty();
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if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
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splx(s);
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return;
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}
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tp->t_state |= TS_BUSY;
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splx(s);
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n = q_to_b(&tp->t_outq, buf, sizeof(buf));
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bicons_putn(buf, n);
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s = spltty();
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tp->t_state &= ~TS_BUSY;
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/* Come back if there's more to do */
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if (tp->t_outq.c_cc) {
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tp->t_state |= TS_TIMEOUT;
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callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, tp);
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}
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if (tp->t_outq.c_cc <= tp->t_lowat) {
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if (tp->t_state&TS_ASLEEP) {
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tp->t_state &= ~TS_ASLEEP;
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wakeup((caddr_t)&tp->t_outq);
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}
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selwakeup(&tp->t_wsel);
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}
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splx(s);
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}
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int
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biconsdevopen(dev_t dev, int flag, int mode, struct proc *p)
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{
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struct tty *tp = &biconsdev_tty[0];
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int status;
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if ((tp->t_state & TS_ISOPEN) == 0) {
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/*
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* Leave baud rate alone!
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*/
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ttychars(tp);
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_state = TS_ISOPEN | TS_CARR_ON;
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(void)(*tp->t_param)(tp, &tp->t_termios);
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ttsetwater(tp);
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} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
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return (EBUSY);
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status = (*tp->t_linesw->l_open)(dev, tp);
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return status;
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}
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int
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biconsdevclose(dev_t dev, int flag, int mode, struct proc *p)
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{
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struct tty *tp = &biconsdev_tty[0];
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(*tp->t_linesw->l_close)(tp, flag);
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ttyclose(tp);
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return (0);
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}
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int
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biconsdevread(dev_t dev, struct uio *uio, int flag)
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{
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struct tty *tp = &biconsdev_tty[0];
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return ((*tp->t_linesw->l_read)(tp, uio, flag));
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}
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int
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biconsdevwrite(dev_t dev, struct uio *uio, int flag)
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{
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struct tty *tp = &biconsdev_tty[0];
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return ((*tp->t_linesw->l_write)(tp, uio, flag));
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}
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int
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biconsdevpoll(dev_t dev, int events, struct proc *p)
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{
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struct tty *tp = &biconsdev_tty[0];
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return ((*tp->t_linesw->l_poll)(tp, events, p));
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}
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struct tty *
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biconsdevtty(dev_t dev)
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{
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struct tty *tp = &biconsdev_tty[0];
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return (tp);
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}
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int
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biconsdevioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
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{
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struct tty *tp = &biconsdev_tty[0];
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int error;
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if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, p)) !=
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EPASSTHROUGH)
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return (error);
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return (ttioctl(tp, cmd, data, flag, p));
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}
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void
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biconsdevstop(struct tty *tp, int rw)
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{
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}
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