400 lines
9.0 KiB
C
400 lines
9.0 KiB
C
/* $NetBSD: ms.c,v 1.24 2003/05/30 23:34:06 petrov Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)ms.c 8.1 (Berkeley) 6/11/93
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*/
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/*
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* Mouse driver (/dev/mouse)
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*/
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/*
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* Zilog Z8530 Dual UART driver (mouse interface)
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*
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* This is the "slave" driver that will be attached to
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* the "zsc" driver for a Sun mouse.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ms.c,v 1.24 2003/05/30 23:34:06 petrov Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/time.h>
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#include <sys/syslog.h>
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#include <sys/select.h>
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#include <sys/poll.h>
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#include <machine/vuid_event.h>
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#include <dev/ic/z8530reg.h>
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#include <machine/z8530var.h>
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#include <dev/sun/event_var.h>
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#include <dev/sun/msvar.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsmousevar.h>
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#include "locators.h"
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#include "wsmouse.h"
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extern struct cfdriver ms_cd;
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dev_type_open(msopen);
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dev_type_close(msclose);
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dev_type_read(msread);
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dev_type_ioctl(msioctl);
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dev_type_poll(mspoll);
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dev_type_kqfilter(mskqfilter);
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const struct cdevsw ms_cdevsw = {
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msopen, msclose, msread, nowrite, msioctl,
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nostop, notty, mspoll, nommap, mskqfilter,
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};
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/****************************************************************
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* Entry points for /dev/mouse
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* (open,close,read,write,...)
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****************************************************************/
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int
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msopen(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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struct ms_softc *ms;
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int unit;
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unit = minor(dev);
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if (unit >= ms_cd.cd_ndevs)
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return (ENXIO);
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ms = ms_cd.cd_devs[unit];
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if (ms == NULL)
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return (ENXIO);
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/* This is an exclusive open device. */
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if (ms->ms_events.ev_io)
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return (EBUSY);
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if (ms->ms_deviopen) {
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int err;
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err = (*ms->ms_deviopen)((struct device *)ms, flags);
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if (err)
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return (err);
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}
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ms->ms_events.ev_io = p;
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ev_init(&ms->ms_events); /* may cause sleep */
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ms->ms_ready = 1; /* start accepting events */
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return (0);
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}
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int
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msclose(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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struct ms_softc *ms;
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ms = ms_cd.cd_devs[minor(dev)];
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ms->ms_ready = 0; /* stop accepting events */
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ev_fini(&ms->ms_events);
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ms->ms_events.ev_io = NULL;
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if (ms->ms_deviclose) {
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int err;
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err = (*ms->ms_deviclose)((struct device *)ms, flags);
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if (err)
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return (err);
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}
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return (0);
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}
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int
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msread(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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struct ms_softc *ms;
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ms = ms_cd.cd_devs[minor(dev)];
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return (ev_read(&ms->ms_events, uio, flags));
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}
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int
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msioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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struct ms_softc *ms;
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ms = ms_cd.cd_devs[minor(dev)];
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switch (cmd) {
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case FIONBIO: /* we will remove this someday (soon???) */
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return (0);
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case FIOASYNC:
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ms->ms_events.ev_async = *(int *)data != 0;
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return (0);
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case TIOCSPGRP:
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if (*(int *)data != ms->ms_events.ev_io->p_pgid)
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return (EPERM);
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return (0);
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case VUIDGFORMAT:
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/* we only do firm_events */
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*(int *)data = VUID_FIRM_EVENT;
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return (0);
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case VUIDSFORMAT:
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if (*(int *)data != VUID_FIRM_EVENT)
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return (EINVAL);
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return (0);
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}
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return (ENOTTY);
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}
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int
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mspoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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struct ms_softc *ms;
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ms = ms_cd.cd_devs[minor(dev)];
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return (ev_poll(&ms->ms_events, events, p));
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}
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int
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mskqfilter(dev, kn)
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dev_t dev;
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struct knote *kn;
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{
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struct ms_softc *ms;
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ms = ms_cd.cd_devs[minor(dev)];
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return (ev_kqfilter(&ms->ms_events, kn));
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}
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/****************************************************************
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* Middle layer (translator)
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****************************************************************/
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/*
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* Called by our ms_softint() routine on input.
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*/
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void
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ms_input(ms, c)
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struct ms_softc *ms;
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int c;
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{
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struct firm_event *fe;
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int mb, ub, d, get, put, any;
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static const char to_one[] = { 1, 2, 2, 4, 4, 4, 4 };
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static const int to_id[] = { MS_RIGHT, MS_MIDDLE, 0, MS_LEFT };
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/*
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* Discard input if not ready. Drop sync on parity or framing
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* error; gain sync on button byte.
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*/
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if (ms->ms_ready == 0)
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return;
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if (c == -1) {
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ms->ms_byteno = -1;
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return;
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}
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if ((c & ~0x0f) == 0x80) { /* if in 0x80..0x8f */
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if (c & 8) {
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ms->ms_byteno = 1; /* short form (3 bytes) */
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} else {
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ms->ms_byteno = 0; /* long form (5 bytes) */
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}
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}
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/*
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* Run the decode loop, adding to the current information.
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* We add, rather than replace, deltas, so that if the event queue
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* fills, we accumulate data for when it opens up again.
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*/
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switch (ms->ms_byteno) {
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case -1:
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return;
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case 0:
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/* buttons (long form) */
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ms->ms_byteno = 2;
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ms->ms_mb = (~c) & 0x7;
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return;
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case 1:
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/* buttons (short form) */
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ms->ms_byteno = 4;
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ms->ms_mb = (~c) & 0x7;
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return;
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case 2:
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/* first delta-x */
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ms->ms_byteno = 3;
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ms->ms_dx += (char)c;
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return;
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case 3:
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/* first delta-y */
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ms->ms_byteno = 4;
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ms->ms_dy += (char)c;
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return;
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case 4:
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/* second delta-x */
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ms->ms_byteno = 5;
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ms->ms_dx += (char)c;
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return;
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case 5:
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/* second delta-y */
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ms->ms_byteno = -1; /* wait for button-byte again */
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ms->ms_dy += (char)c;
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break;
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default:
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panic("ms_rint");
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/* NOTREACHED */
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}
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#if NWSMOUSE > 0
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if (ms->ms_wsmousedev != NULL && ms->ms_ready == 2) {
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mb = ((ms->ms_mb & 4) >> 2) |
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(ms->ms_mb & 2) |
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((ms->ms_mb & 1) << 2);
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wsmouse_input(ms->ms_wsmousedev,
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mb, ms->ms_dx, ms->ms_dy, 0,
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WSMOUSE_INPUT_DELTA);
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ms->ms_dx = 0;
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ms->ms_dy = 0;
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return;
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}
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#endif
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/*
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* We have at least one event (mouse button, delta-X, or
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* delta-Y; possibly all three, and possibly three separate
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* button events). Deliver these events until we are out
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* of changes or out of room. As events get delivered,
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* mark them `unchanged'.
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*/
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any = 0;
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get = ms->ms_events.ev_get;
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put = ms->ms_events.ev_put;
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fe = &ms->ms_events.ev_q[put];
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/* NEXT prepares to put the next event, backing off if necessary */
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#define NEXT \
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if ((++put) % EV_QSIZE == get) { \
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put--; \
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goto out; \
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}
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/* ADVANCE completes the `put' of the event */
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#define ADVANCE \
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fe++; \
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if (put >= EV_QSIZE) { \
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put = 0; \
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fe = &ms->ms_events.ev_q[0]; \
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} \
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any = 1
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mb = ms->ms_mb;
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ub = ms->ms_ub;
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while ((d = mb ^ ub) != 0) {
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/*
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* Mouse button change. Convert up to three changes
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* to the `first' change, and drop it into the event queue.
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*/
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NEXT;
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d = to_one[d - 1]; /* from 1..7 to {1,2,4} */
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fe->id = to_id[d - 1]; /* from {1,2,4} to ID */
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fe->value = mb & d ? VKEY_DOWN : VKEY_UP;
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fe->time = time;
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ADVANCE;
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ub ^= d;
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}
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if (ms->ms_dx) {
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NEXT;
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fe->id = LOC_X_DELTA;
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fe->value = ms->ms_dx;
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fe->time = time;
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ADVANCE;
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ms->ms_dx = 0;
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}
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if (ms->ms_dy) {
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NEXT;
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fe->id = LOC_Y_DELTA;
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fe->value = ms->ms_dy;
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fe->time = time;
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ADVANCE;
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ms->ms_dy = 0;
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}
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out:
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if (any) {
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ms->ms_ub = ub;
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ms->ms_events.ev_put = put;
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EV_WAKEUP(&ms->ms_events);
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}
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}
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