diff options
Diffstat (limited to 'sys/sys/ttydevsw.h')
| -rw-r--r-- | sys/sys/ttydevsw.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/sys/sys/ttydevsw.h b/sys/sys/ttydevsw.h new file mode 100644 index 0000000..a4f5afb --- /dev/null +++ b/sys/sys/ttydevsw.h @@ -0,0 +1,158 @@ +/*- + * 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_ */ |
