210 lines
5.3 KiB
C
210 lines
5.3 KiB
C
/*-
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* Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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*
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* Portions of this software were developed under sponsorship from Snow
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* B.V., the Netherlands.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _SYS_TTYDEVSW_H_
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#define _SYS_TTYDEVSW_H_
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#ifndef _SYS_TTY_H_
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#error "can only be included through <sys/tty.h>"
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#endif /* !_SYS_TTY_H_ */
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/*
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* Driver routines that are called from the line discipline to adjust
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* hardware parameters and such.
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*/
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typedef int tsw_open_t(struct tty *tp);
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typedef void tsw_close_t(struct tty *tp);
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typedef void tsw_outwakeup_t(struct tty *tp);
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typedef void tsw_inwakeup_t(struct tty *tp);
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typedef int tsw_ioctl_t(struct tty *tp, u_long cmd, caddr_t data,
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struct thread *td);
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typedef int tsw_cioctl_t(struct tty *tp, int unit, u_long cmd, caddr_t data,
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struct thread *td);
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typedef int tsw_param_t(struct tty *tp, struct termios *t);
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typedef int tsw_modem_t(struct tty *tp, int sigon, int sigoff);
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typedef int tsw_mmap_t(struct tty *tp, vm_ooffset_t offset,
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vm_paddr_t * paddr, int nprot, vm_memattr_t *memattr);
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typedef void tsw_pktnotify_t(struct tty *tp, char event);
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typedef void tsw_free_t(void *softc);
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typedef bool tsw_busy_t(struct tty *tp);
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struct ttydevsw {
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unsigned int tsw_flags; /* Default TTY flags. */
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tsw_open_t *tsw_open; /* Device opening. */
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tsw_close_t *tsw_close; /* Device closure. */
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tsw_outwakeup_t *tsw_outwakeup; /* Output available. */
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tsw_inwakeup_t *tsw_inwakeup; /* Input can be stored again. */
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tsw_ioctl_t *tsw_ioctl; /* ioctl() hooks. */
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tsw_cioctl_t *tsw_cioctl; /* ioctl() on control devices. */
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tsw_param_t *tsw_param; /* TIOCSETA device parameter setting. */
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tsw_modem_t *tsw_modem; /* Modem sigon/sigoff. */
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tsw_mmap_t *tsw_mmap; /* mmap() hooks. */
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tsw_pktnotify_t *tsw_pktnotify; /* TIOCPKT events. */
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tsw_free_t *tsw_free; /* Destructor. */
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tsw_busy_t *tsw_busy; /* Draining output. */
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void *tsw_spare[3]; /* For future use. */
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};
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static __inline int
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ttydevsw_open(struct tty *tp)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_open(tp));
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}
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static __inline void
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ttydevsw_close(struct tty *tp)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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tp->t_devsw->tsw_close(tp);
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}
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static __inline void
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ttydevsw_outwakeup(struct tty *tp)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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/* Prevent spurious wakeups. */
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if (ttydisc_getc_poll(tp) == 0)
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return;
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tp->t_devsw->tsw_outwakeup(tp);
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}
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static __inline void
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ttydevsw_inwakeup(struct tty *tp)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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/* Prevent spurious wakeups. */
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if (tp->t_flags & TF_HIWAT_IN)
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return;
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tp->t_devsw->tsw_inwakeup(tp);
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}
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static __inline int
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ttydevsw_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_ioctl(tp, cmd, data, td));
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}
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static __inline int
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ttydevsw_cioctl(struct tty *tp, int unit, u_long cmd, caddr_t data,
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struct thread *td)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_cioctl(tp, unit, cmd, data, td));
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}
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static __inline int
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ttydevsw_param(struct tty *tp, struct termios *t)
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{
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_param(tp, t));
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}
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static __inline int
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ttydevsw_modem(struct tty *tp, int sigon, int sigoff)
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{
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_modem(tp, sigon, sigoff));
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}
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static __inline int
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ttydevsw_mmap(struct tty *tp, vm_ooffset_t offset, vm_paddr_t *paddr,
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int nprot, vm_memattr_t *memattr)
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{
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_mmap(tp, offset, paddr, nprot, memattr));
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}
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static __inline void
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ttydevsw_pktnotify(struct tty *tp, char event)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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tp->t_devsw->tsw_pktnotify(tp, event);
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}
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static __inline void
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ttydevsw_free(struct tty *tp)
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{
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MPASS(tty_gone(tp));
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tp->t_devsw->tsw_free(tty_softc(tp));
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}
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static __inline bool
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ttydevsw_busy(struct tty *tp)
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{
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tty_lock_assert(tp, MA_OWNED);
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MPASS(!tty_gone(tp));
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return (tp->t_devsw->tsw_busy(tp));
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}
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#endif /* !_SYS_TTYDEVSW_H_ */
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