347 lines
8.4 KiB
C
347 lines
8.4 KiB
C
/* $NetBSD: ms.c,v 1.8 1996/04/01 17:29:52 christos 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.
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*/
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#include <sys/param.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/syslog.h>
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#include <sys/systm.h>
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#include <sys/tty.h>
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#include <sys/signalvar.h>
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#include <sys/conf.h>
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#include <machine/vuid_event.h>
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#include <machine/cpu.h>
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#include <machine/kbd.h>
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#include <machine/conf.h>
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#include <sparc/dev/event_var.h>
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/*
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* Mouse state. A Mouse Systems mouse is a fairly simple device,
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* producing five-byte blobs of the form:
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*
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* b dx dy dx dy
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*
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* where b is the button state, encoded as 0x80|(~buttons)---there are
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* three buttons (4=left, 2=middle, 1=right)---and dx,dy are X and Y
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* delta values, none of which have are in [0x80..0x87]. (This lets
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* us sync up with the mouse after an error.)
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*/
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struct ms_softc {
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short ms_byteno; /* input byte number, for decode */
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char ms_mb; /* mouse button state */
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char ms_ub; /* user button state */
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int ms_dx; /* delta-x */
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int ms_dy; /* delta-y */
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struct tty *ms_mouse; /* downlink for output to mouse */
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void (*ms_open) __P((struct tty *)); /* enable dataflow */
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void (*ms_close) __P((struct tty *));/* disable dataflow */
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volatile int ms_ready; /* event queue is ready */
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struct evvar ms_events; /* event queue state */
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} ms_softc;
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/*
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* Attach the mouse serial (down-link) interface.
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* The Sun 4 needs to have the baud rate set explicitly, but we handle
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* that in ms_open().
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*/
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void
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ms_serial(tp, iopen, iclose)
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struct tty *tp;
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void (*iopen) __P((struct tty *));
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void (*iclose) __P((struct tty *));
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{
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ms_softc.ms_mouse = tp;
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ms_softc.ms_open = iopen;
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ms_softc.ms_close = iclose;
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}
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void
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ms_rint(c)
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register int c;
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{
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register struct firm_event *fe;
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register struct ms_softc *ms = &ms_softc;
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register 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 & (TTY_FE|TTY_PE)) {
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log(LOG_WARNING,
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"mouse input parity or framing error (0x%x)\n", c);
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ms->ms_byteno = -1;
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return;
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}
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if ((unsigned)(c - 0x80) < 8) /* if in 0x80..0x87 */
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ms->ms_byteno = 0;
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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 */
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ms->ms_byteno = 1;
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ms->ms_mb = (~c) & 0x7;
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return;
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case 1:
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/* first delta-x */
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ms->ms_byteno = 2;
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ms->ms_dx += (char)c;
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return;
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case 2:
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/* first delta-y */
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ms->ms_byteno = 3;
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ms->ms_dy += (char)c;
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return;
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case 3:
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/* second delta-x */
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ms->ms_byteno = 4;
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ms->ms_dx += (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 = -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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/*
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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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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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if (ms_softc.ms_events.ev_io)
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return (EBUSY);
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ms_softc.ms_events.ev_io = p;
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ev_init(&ms_softc.ms_events); /* may cause sleep */
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if (CPU_ISSUN4) {
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/* We need to set the baud rate on the mouse. */
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ms_softc.ms_mouse->t_ispeed =
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ms_softc.ms_mouse->t_ospeed = 1200;
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}
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(*ms_softc.ms_open)(ms_softc.ms_mouse);
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ms_softc.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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ms_softc.ms_ready = 0; /* stop accepting events */
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ev_fini(&ms_softc.ms_events);
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(*ms_softc.ms_close)(ms_softc.ms_mouse);
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ms_softc.ms_events.ev_io = NULL;
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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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return (ev_read(&ms_softc.ms_events, uio, flags));
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}
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/* this routine should not exist, but is convenient to write here for now */
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int
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mswrite(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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return (EOPNOTSUPP);
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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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register caddr_t data;
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int flag;
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struct proc *p;
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{
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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_softc.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_softc.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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msselect(dev, rw, p)
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dev_t dev;
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int rw;
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struct proc *p;
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{
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return (ev_select(&ms_softc.ms_events, rw, p));
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}
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