319 lines
9.1 KiB
C
319 lines
9.1 KiB
C
/* Portions of this file were derived from the following files:
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*
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**********************************************************************
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*
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* Xserver/hw/kdrive/linux/ps2.c
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*
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* Copyright (c) 1999 by Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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/*
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* Copyright 2001,2003 Red Hat Inc., Durham, North Carolina.
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*
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation on the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* Authors:
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* Rickard E. (Rik) Faith <faith@redhat.com>
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*
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*/
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/** \file
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*
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* This code implements a low-level device driver for a serial MS mouse.
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* The code is derived from code by Keith Packard (see the source code
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* for complete references). */
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#ifdef HAVE_DMX_CONFIG_H
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#include <dmx-config.h>
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#endif
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#include "inputstr.h"
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#include <X11/Xos.h>
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#include <errno.h>
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#include <termios.h>
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/*****************************************************************************/
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/* Define some macros to make it easier to move this file to another
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* part of the Xserver tree. All calls to the dmx* layer are #defined
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* here for the .c file. The .h file will also have to be edited. */
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#include "dmxinputinit.h"
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#include "lnx-ps2.h"
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#define GETPRIV myPrivate *priv \
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= ((DMXLocalInputInfoPtr)(pDev->devicePrivate))->private
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#define LOG0(f) dmxLog(dmxDebug,f)
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#define LOG1(f,a) dmxLog(dmxDebug,f,a)
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#define LOG2(f,a,b) dmxLog(dmxDebug,f,a,b)
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#define LOG3(f,a,b,c) dmxLog(dmxDebug,f,a,b,c)
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#define FATAL0(f) dmxLog(dmxFatal,f)
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#define FATAL1(f,a) dmxLog(dmxFatal,f,a)
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#define FATAL2(f,a,b) dmxLog(dmxFatal,f,a,b)
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#define MOTIONPROC dmxMotionProcPtr
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#define ENQUEUEPROC dmxEnqueueProcPtr
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#define CHECKPROC dmxCheckSpecialProcPtr
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#define BLOCK DMXBlockType
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/* End of interface definitions. */
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/*****************************************************************************/
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/* Private area for PS/2 devices. */
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typedef struct _myPrivate {
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DeviceIntPtr pMouse;
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int fd;
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enum {
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button1 = 0x0001,
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button2 = 0x0002,
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button3 = 0x0004,
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button4 = 0x0008,
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button5 = 0x0010
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} buttons;
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} myPrivate;
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static int
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ps2LinuxReadBytes(int fd, unsigned char *buf, int len, int min)
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{
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int n, tot;
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fd_set set;
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struct timeval tv;
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tot = 0;
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while (len) {
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n = read(fd, buf, len);
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if (n > 0) {
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tot += n;
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buf += n;
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len -= n;
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}
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if (tot % min == 0)
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break;
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FD_ZERO(&set);
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FD_SET(fd, &set);
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tv.tv_sec = 0;
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tv.tv_usec = 100 * 1000;
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n = select(fd + 1, &set, 0, 0, &tv);
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if (n <= 0)
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break;
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}
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return tot;
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}
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static void
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ps2LinuxButton(DevicePtr pDev, ENQUEUEPROC enqueue, int buttons, BLOCK block)
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{
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GETPRIV;
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#define PRESS(b) \
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do { \
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enqueue(pDev, ButtonPress, 0, 0, NULL, block); \
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} while (0)
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#define RELEASE(b) \
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do { \
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enqueue(pDev, ButtonRelease, 0, 0, NULL, block); \
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} while (0)
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if ((buttons & button1) && !(priv->buttons & button1))
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PRESS(1);
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if (!(buttons & button1) && (priv->buttons & button1))
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RELEASE(1);
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if ((buttons & button2) && !(priv->buttons & button2))
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PRESS(2);
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if (!(buttons & button2) && (priv->buttons & button2))
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RELEASE(2);
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if ((buttons & button3) && !(priv->buttons & button3))
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PRESS(3);
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if (!(buttons & button3) && (priv->buttons & button3))
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RELEASE(3);
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if ((buttons & button4) && !(priv->buttons & button4))
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PRESS(4);
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if (!(buttons & button4) && (priv->buttons & button4))
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RELEASE(4);
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if ((buttons & button5) && !(priv->buttons & button5))
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PRESS(5);
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if (!(buttons & button5) && (priv->buttons & button5))
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RELEASE(5);
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priv->buttons = buttons;
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}
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/** Read an event from the \a pDev device. If the event is a motion
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* event, enqueue it with the \a motion function. Otherwise, check for
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* special keys with the \a checkspecial function and enqueue the event
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* with the \a enqueue function. The \a block type is passed to the
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* functions so that they may block SIGIO handling as appropriate to the
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* caller of this function. */
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void
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ps2LinuxRead(DevicePtr pDev, MOTIONPROC motion,
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ENQUEUEPROC enqueue, CHECKPROC checkspecial, BLOCK block)
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{
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GETPRIV;
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unsigned char buf[3 * 200]; /* RATS: Use ok */
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unsigned char *b;
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int n;
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int dx, dy, v[2];
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while ((n = ps2LinuxReadBytes(priv->fd, buf, sizeof(buf), 3)) > 0) {
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b = buf;
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while (n >= 3) {
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dx = b[1] - ((b[0] & 0x10) ? 256 : 0);
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dy = -b[2] + ((b[0] & 0x20) ? 256 : 0);
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v[0] = -dx;
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v[1] = -dy;
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motion(pDev, v, 0, 2, 1, block);
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ps2LinuxButton(pDev, enqueue, (((b[0] & 4) ? button2 : 0)
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| ((b[0] & 2) ? button3 : 0)
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| ((b[0] & 1) ? button1 : 0)),
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block);
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n -= 3;
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b += 3;
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}
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}
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}
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/** Initialize \a pDev. */
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void
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ps2LinuxInit(DevicePtr pDev)
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{
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GETPRIV;
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const char *names[] = { "/dev/mouse", "/dev/psaux", NULL };
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int i;
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if (priv->fd >= 0)
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return;
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for (i = 0; names[i]; i++) {
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if ((priv->fd = open(names[i], O_RDWR | O_NONBLOCK, 0)) >= 0)
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break;
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}
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if (priv->fd < 0)
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FATAL1("ps2LinuxInit: Cannot open mouse port (%s)\n", strerror(errno));
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}
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/** Turn \a pDev on (i.e., take input from \a pDev). */
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int
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ps2LinuxOn(DevicePtr pDev)
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{
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GETPRIV;
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if (priv->fd < 0)
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ps2LinuxInit(pDev);
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return priv->fd;
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}
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/** Turn \a pDev off (i.e., stop taking input from \a pDev). */
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void
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ps2LinuxOff(DevicePtr pDev)
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{
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GETPRIV;
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close(priv->fd);
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priv->fd = -1;
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}
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static void
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ps2LinuxGetMap(DevicePtr pDev, unsigned char *map, int *nButtons)
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{
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int i;
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if (nButtons)
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*nButtons = 3;
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if (map)
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for (i = 0; i <= *nButtons; i++)
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map[i] = i;
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}
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/** Currently unused hook called prior to an VT switch. */
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void
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ps2LinuxVTPreSwitch(pointer p)
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{
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}
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/** Currently unused hook called after returning from a VT switch. */
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void
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ps2LinuxVTPostSwitch(pointer p)
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{
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}
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/** Create a private structure for use within this file. */
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pointer
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ps2LinuxCreatePrivate(DeviceIntPtr pMouse)
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{
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myPrivate *priv = calloc(1, sizeof(*priv));
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priv->fd = -1;
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priv->pMouse = pMouse;
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return priv;
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}
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/** Destroy a private structure. */
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void
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ps2LinuxDestroyPrivate(pointer priv)
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{
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free(priv);
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}
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/** Fill the \a info structure with information needed to initialize \a
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* pDev. */
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void
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ps2LinuxGetInfo(DevicePtr pDev, DMXLocalInitInfoPtr info)
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{
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info->buttonClass = 1;
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ps2LinuxGetMap(pDev, info->map, &info->numButtons);
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info->valuatorClass = 1;
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info->numRelAxes = 2;
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info->minval[0] = 0;
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info->maxval[0] = 0;
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info->res[0] = 1;
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info->minres[0] = 0;
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info->maxres[0] = 1;
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info->ptrFeedbackClass = 1;
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}
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