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/*-
* Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
* All rights reserved.
*
* Portions of this software were developed under sponsorship from Snow
* B.V., the Netherlands.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _SYS_TTYDEVSW_H_
#define _SYS_TTYDEVSW_H_
#ifndef _SYS_TTY_H_
#error "can only be included through <sys/tty.h>"
#endif /* !_SYS_TTY_H_ */
/*
* Driver routines that are called from the line discipline to adjust
* hardware parameters and such.
*/
typedef int tsw_open_t(struct tty *);
typedef void tsw_close_t(struct tty *);
typedef void tsw_outwakeup_t(struct tty *);
typedef void tsw_inwakeup_t(struct tty *);
typedef int tsw_ioctl_t(struct tty *, u_long, caddr_t, struct thread *);
typedef int tsw_param_t(struct tty *, struct termios *);
typedef int tsw_modem_t(struct tty *, int, int);
typedef int tsw_mmap_t(struct tty *, vm_offset_t, vm_paddr_t *, int);
typedef void tsw_free_t(void *);
struct ttydevsw {
unsigned int tsw_flags; /* Default TTY flags. */
tsw_open_t *tsw_open; /* Device opening. */
tsw_close_t *tsw_close; /* Device closure. */
tsw_outwakeup_t *tsw_outwakeup; /* Output available. */
tsw_inwakeup_t *tsw_inwakeup; /* Input can be stored again. */
tsw_ioctl_t *tsw_ioctl; /* ioctl() hooks. */
tsw_param_t *tsw_param; /* TIOCSETA device parameter setting. */
tsw_modem_t *tsw_modem; /* Modem sigon/sigoff. */
tsw_mmap_t *tsw_mmap; /* mmap() hooks. */
tsw_free_t *tsw_free; /* Destructor. */
};
static __inline int
ttydevsw_open(struct tty *tp)
{
tty_lock_assert(tp, MA_OWNED);
MPASS(!tty_gone(tp));
return tp->t_devsw->tsw_open(tp);
}
static __inline void
ttydevsw_close(struct tty *tp)
{
tty_lock_assert(tp, MA_OWNED);
MPASS(!tty_gone(tp));
tp->t_devsw->tsw_close(tp);
}
static __inline void
ttydevsw_outwakeup(struct tty *tp)
{
tty_lock_assert(tp, MA_OWNED);
MPASS(!tty_gone(tp));
/* Prevent spurious wakeups. */
if (tp->t_flags & TF_STOPPED)
return;
if (ttyoutq_bytesused(&tp->t_outq) == 0)
return;
tp->t_devsw->tsw_outwakeup(tp);
}
static __inline void
ttydevsw_inwakeup(struct tty *tp)
{
tty_lock_assert(tp, MA_OWNED);
MPASS(!tty_gone(tp));
/* Prevent spurious wakeups. */
if (tp->t_flags & TF_HIWAT_IN)
return;
tp->t_devsw->tsw_inwakeup(tp);
}
static __inline int
ttydevsw_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
{
tty_lock_assert(tp, MA_OWNED);
MPASS(!tty_gone(tp));
return tp->t_devsw->tsw_ioctl(tp, cmd, data, td);
}
static __inline int
ttydevsw_param(struct tty *tp, struct termios *t)
{
MPASS(!tty_gone(tp));
return tp->t_devsw->tsw_param(tp, t);
}
static __inline int
ttydevsw_modem(struct tty *tp, int sigon, int sigoff)
{
MPASS(!tty_gone(tp));
return tp->t_devsw->tsw_modem(tp, sigon, sigoff);
}
static __inline int
ttydevsw_mmap(struct tty *tp, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
{
MPASS(!tty_gone(tp));
return tp->t_devsw->tsw_mmap(tp, offset, paddr, nprot);
}
static __inline void
ttydevsw_free(struct tty *tp)
{
MPASS(tty_gone(tp));
tp->t_devsw->tsw_free(tty_softc(tp));
}
#endif /* !_SYS_TTYDEVSW_H_ */
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