/* $NetBSD: ms.c,v 1.7 1997/09/02 13:20:57 thorpej Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * 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 University of * California, Berkeley and its contributors. * 4. 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. * * @(#)ms.c 8.1 (Berkeley) 6/11/93 */ /* * Mouse driver. */ #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: ms.c,v 1.7 1997/09/02 13:20:57 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include cdev_decl(ms); struct ms_softc { struct device *ms_dev; struct wscons_mdev_spec ms_spec; char ms_mb; /* mouse button state */ char ms_ub; /* user button state */ int ms_dx; /* delta-x */ int ms_dy; /* delta-y */ volatile int ms_ready; /* event queue is ready */ struct evvar ms_events; /* event queue state */ } ms_softc; void msattach(mdev, mspec) struct device *mdev; struct wscons_mdev_spec *mspec; { register struct ms_softc *m = &ms_softc; m->ms_dev = mdev; m->ms_spec = *mspec; } void ms_event(buttons, dx, dy) char buttons; /* 0 is up */ int dx, dy; { register struct firm_event *fe; register struct ms_softc *ms = &ms_softc; register int mb, ub, d, get, put, any; static const char to_one[] = { 1, 2, 2, 4, 4, 4, 4 }; static const int to_id[] = { MS_RIGHT, MS_MIDDLE, 0, MS_LEFT }; /* * Discard input if not ready. */ if (ms->ms_ready == 0) return; ms->ms_mb = (buttons) & 0x7; ms->ms_dx += dx; ms->ms_dy += dy; /* * We have at least one event (mouse button, delta-X, or * delta-Y; possibly all three, and possibly three separate * button events). Deliver these events until we are out * of changes or out of room. As events get delivered, * mark them `unchanged'. */ any = 0; get = ms->ms_events.ev_get; put = ms->ms_events.ev_put; fe = &ms->ms_events.ev_q[put]; /* NEXT prepares to put the next event, backing off if necessary */ #define NEXT \ if ((++put) % EV_QSIZE == get) { \ put--; \ goto out; \ } /* ADVANCE completes the `put' of the event */ #define ADVANCE \ fe++; \ if (put >= EV_QSIZE) { \ put = 0; \ fe = &ms->ms_events.ev_q[0]; \ } \ any = 1 mb = ms->ms_mb; ub = ms->ms_ub; while ((d = mb ^ ub) != 0) { /* * Mouse button change. Convert up to three changes * to the `first' change, and drop it into the event queue. */ NEXT; d = to_one[d - 1]; /* from 1..7 to {1,2,4} */ fe->id = to_id[d - 1]; /* from {1,2,4} to ID */ fe->value = mb & d ? VKEY_DOWN : VKEY_UP; fe->time = time; ADVANCE; ub ^= d; } if (ms->ms_dx) { NEXT; fe->id = LOC_X_DELTA; fe->value = ms->ms_dx; fe->time = time; ADVANCE; ms->ms_dx = 0; } if (ms->ms_dy) { NEXT; fe->id = LOC_Y_DELTA; fe->value = ms->ms_dy; fe->time = time; ADVANCE; ms->ms_dy = 0; } out: if (any) { ms->ms_ub = ub; ms->ms_events.ev_put = put; EV_WAKEUP(&ms->ms_events); } } int msopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { int error; if (ms_softc.ms_dev == NULL) /* never attached! */ return (ENXIO); if (ms_softc.ms_events.ev_io) return (EBUSY); ms_softc.ms_events.ev_io = p; ev_init(&ms_softc.ms_events); /* may cause sleep */ ms_softc.ms_ready = 1; /* start accepting events */ error = (*ms_softc.ms_spec.wm_enable)(ms_softc.ms_dev); if (error) { ms_softc.ms_ready = 0; /* stop accepting events */ ev_fini(&ms_softc.ms_events); ms_softc.ms_events.ev_io = NULL; return (error); } return (0); } int msclose(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { (*ms_softc.ms_spec.wm_disable)(ms_softc.ms_dev); ms_softc.ms_ready = 0; /* stop accepting events */ ev_fini(&ms_softc.ms_events); ms_softc.ms_events.ev_io = NULL; return (0); } int msread(dev, uio, flags) dev_t dev; struct uio *uio; int flags; { return (ev_read(&ms_softc.ms_events, uio, flags)); } /* this routine should not exist, but is convenient to write here for now */ int mswrite(dev, uio, flags) dev_t dev; struct uio *uio; int flags; { return (EOPNOTSUPP); } int msioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; register caddr_t data; int flag; struct proc *p; { switch (cmd) { case FIONBIO: /* we will remove this someday (soon???) */ return (0); case FIOASYNC: ms_softc.ms_events.ev_async = *(int *)data != 0; return (0); case TIOCSPGRP: if (*(int *)data != ms_softc.ms_events.ev_io->p_pgid) return (EPERM); return (0); case VUIDGFORMAT: /* we only do firm_events */ *(int *)data = VUID_FIRM_EVENT; return (0); case VUIDSFORMAT: if (*(int *)data != VUID_FIRM_EVENT) return (EINVAL); return (0); } return (ENOTTY); } int mspoll(dev, events, p) dev_t dev; int events; struct proc *p; { return (ev_poll(&ms_softc.ms_events, events, p)); }