/*      $NetBSD: biconsdev.c,v 1.23 2015/08/20 14:40:18 christos 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. 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 1.23 2015/08/20 14:40:18 christos 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 <sys/kauth.h>

#include <dev/cons.h>
#include <dev/hpc/bicons.h>
#include <dev/hpc/biconsvar.h>

#include "ioconf.h"

struct tty biconsdev_tty[NBICONSDEV];
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 = {
       .d_open = biconsdevopen,
       .d_close = biconsdevclose,
       .d_read = biconsdevread,
       .d_write = biconsdevwrite,
       .d_ioctl = biconsdevioctl,
       .d_stop = nostop,
       .d_tty = biconsdevtty,
       .d_poll = biconsdevpoll,
       .d_mmap = nommap,
       .d_kqfilter = ttykqfilter,
       .d_discard = nodiscard,
       .d_flag = 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 = ttyldisc_default();


       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 (ttypull(tp)) {
               tp->t_state |= TS_TIMEOUT;
               callout_schedule(&tp->t_rstrt_ch, 1);
       }
       splx(s);
}


int
biconsdevopen(dev_t dev, int flag, int mode, struct lwp *l)
{
       struct tty *tp = &biconsdev_tty[0];
       int status;

       if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
               return (EBUSY);

       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);
       }

       status = (*tp->t_linesw->l_open)(dev, tp);
       return status;
}


int
biconsdevclose(dev_t dev, int flag, int mode, struct lwp *l)
{
       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 lwp *l)
{
       struct tty *tp = &biconsdev_tty[0];

       return ((*tp->t_linesw->l_poll)(tp, events, l));
}


struct tty *
biconsdevtty(dev_t dev)
{
       struct tty *tp = &biconsdev_tty[0];

       return (tp);
}

int
biconsdevioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
       struct tty *tp = &biconsdev_tty[0];
       int error;

       if ((error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l)) !=
           EPASSTHROUGH)
               return (error);
       return (ttioctl(tp, cmd, data, flag, l));
}

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