/* $NetBSD: ms.c,v 1.37 2008/04/20 03:05:55 tsutsui 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. 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 (/dev/mouse) */ /* * Zilog Z8530 Dual UART driver (mouse interface) * * This is the "slave" driver that will be attached to * the "zsc" driver for a Sun mouse. */ #include __KERNEL_RCSID(0, "$NetBSD: ms.c,v 1.37 2008/04/20 03:05:55 tsutsui Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" #include "locators.h" #include "wsmouse.h" dev_type_open(msopen); dev_type_close(msclose); dev_type_read(msread); dev_type_ioctl(msioctl); dev_type_poll(mspoll); dev_type_kqfilter(mskqfilter); const struct cdevsw ms_cdevsw = { msopen, msclose, msread, nowrite, msioctl, nostop, notty, mspoll, nommap, mskqfilter, D_OTHER }; /**************************************************************** * Entry points for /dev/mouse * (open,close,read,write,...) ****************************************************************/ int msopen(dev_t dev, int flags, int mode, struct lwp *l) { struct ms_softc *ms; ms = device_lookup_private(&ms_cd, minor(dev)); if (ms == NULL) return ENXIO; /* This is an exclusive open device. */ if (ms->ms_events.ev_io) return EBUSY; if (ms->ms_deviopen) { int err; err = (*ms->ms_deviopen)(ms->ms_dev, flags); if (err) return err; } ms->ms_events.ev_io = l->l_proc; ev_init(&ms->ms_events); /* may cause sleep */ ms->ms_ready = 1; /* start accepting events */ return 0; } int msclose(dev_t dev, int flags, int mode, struct lwp *l) { struct ms_softc *ms; ms = device_lookup_private(&ms_cd, minor(dev)); ms->ms_ready = 0; /* stop accepting events */ ev_fini(&ms->ms_events); ms->ms_events.ev_io = NULL; if (ms->ms_deviclose) { int err; err = (*ms->ms_deviclose)(ms->ms_dev, flags); if (err) return err; } return 0; } int msread(dev_t dev, struct uio *uio, int flags) { struct ms_softc *ms; ms = device_lookup_private(&ms_cd, minor(dev)); return ev_read(&ms->ms_events, uio, flags); } int msioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { struct ms_softc *ms; ms = device_lookup_private(&ms_cd, minor(dev)); switch (cmd) { case FIONBIO: /* we will remove this someday (soon???) */ return 0; case FIOASYNC: ms->ms_events.ev_async = *(int *)data != 0; return 0; case FIOSETOWN: if (-*(int *)data != ms->ms_events.ev_io->p_pgid && *(int *)data != ms->ms_events.ev_io->p_pid) return EPERM; return 0; case TIOCSPGRP: if (*(int *)data != ms->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_t dev, int events, struct lwp *l) { struct ms_softc *ms; ms = device_lookup_private(&ms_cd, minor(dev)); return ev_poll(&ms->ms_events, events, l); } int mskqfilter(dev_t dev, struct knote *kn) { struct ms_softc *ms; ms = device_lookup_private(&ms_cd, minor(dev)); return ev_kqfilter(&ms->ms_events, kn); } /**************************************************************** * Middle layer (translator) ****************************************************************/ /* * Called by our ms_softint() routine on input. */ void ms_input(struct ms_softc *ms, int c) { struct firm_event *fe; 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. Drop sync on parity or framing * error; gain sync on button byte. */ if (ms->ms_ready == 0) return; if (c == -1) { ms->ms_byteno = -1; return; } if ((c & 0xb0) == 0x80) { /* if in 0x80..0x8f of 0xc0..0xcf */ if (c & 8) { ms->ms_byteno = 1; /* short form (3 bytes) */ } else { ms->ms_byteno = 0; /* long form (5 bytes) */ } } /* * Run the decode loop, adding to the current information. * We add, rather than replace, deltas, so that if the event queue * fills, we accumulate data for when it opens up again. */ switch (ms->ms_byteno) { case -1: return; case 0: /* buttons (long form) */ ms->ms_byteno = 2; ms->ms_mb = (~c) & 0x7; return; case 1: /* buttons (short form) */ ms->ms_byteno = 4; ms->ms_mb = (~c) & 0x7; return; case 2: /* first delta-x */ ms->ms_byteno = 3; ms->ms_dx += (char)c; return; case 3: /* first delta-y */ ms->ms_byteno = 4; ms->ms_dy += (char)c; return; case 4: /* second delta-x */ ms->ms_byteno = 5; ms->ms_dx += (char)c; return; case 5: /* second delta-y */ ms->ms_byteno = -1; /* wait for button-byte again */ ms->ms_dy += (char)c; break; default: panic("ms_rint"); /* NOTREACHED */ } #if NWSMOUSE > 0 if (ms->ms_wsmousedev != NULL && ms->ms_ready == 2) { mb = ((ms->ms_mb & 4) >> 2) | (ms->ms_mb & 2) | ((ms->ms_mb & 1) << 2); wsmouse_input(ms->ms_wsmousedev, mb, ms->ms_dx, ms->ms_dy, 0, 0, WSMOUSE_INPUT_DELTA); ms->ms_dx = 0; ms->ms_dy = 0; return; } #endif /* * 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; getmicrotime(&fe->time); ADVANCE; ub ^= d; } if (ms->ms_dx) { NEXT; fe->id = LOC_X_DELTA; fe->value = ms->ms_dx; getmicrotime(&fe->time); ADVANCE; ms->ms_dx = 0; } if (ms->ms_dy) { NEXT; fe->id = LOC_Y_DELTA; fe->value = ms->ms_dy; getmicrotime(&fe->time); ADVANCE; ms->ms_dy = 0; } out: if (any) { ms->ms_ub = ub; ms->ms_events.ev_put = put; EV_WAKEUP(&ms->ms_events); } }