FreeBSD/Linux Kernel Cross Reference
sys/dev/hpc/biconsdev.c

     /*      $NetBSD: biconsdev.c,v 1.20 2007/11/19 18:51:46 ad 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 1.20 2007/11/19 18:51:46 ad 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>
    
    struct tty biconsdev_tty[NBICONSDEV];
    void    biconsdevattach(int);
    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 = {
            biconsdevopen, biconsdevclose, biconsdevread, biconsdevwrite,
           biconsdevioctl, nostop, biconsdevtty, biconsdevpoll, nommap,
           ttykqfilter, 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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