/*
 * $XFree86: xc/programs/Xserver/hw/tinyx/linux/ps2.c,v 1.2 2004/06/23 19:40:16 tsi Exp $
 *
 * Copyright © 1999 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */
/*
 * Copyright (c) 2004 by The XFree86 Project, Inc.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject
 * to the following conditions:
 *
 *   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, and in the same place and form as other copyright,
 *       license and disclaimer information.
 *
 *   3.  The end-user documentation included with the redistribution,
 *       if any, must include the following acknowledgment: "This product
 *       includes software developed by The XFree86 Project, Inc
 *       (http://www.xfree86.org/) and its contributors", in the same
 *       place and form as other third-party acknowledgments.  Alternately,
 *       this acknowledgment may appear in the software itself, in the
 *       same form and location as other such third-party acknowledgments.
 *
 *   4.  Except as contained in this notice, the name of The XFree86
 *       Project, Inc shall not be used in advertising or otherwise to
 *       promote the sale, use or other dealings in this Software without
 *       prior written authorization from The XFree86 Project, Inc.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 XFREE86 PROJECT, INC OR ITS 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.
 */

#define NEED_EVENTS
#include "X.h"
#include "Xproto.h"
#include "inputstr.h"
#include "scrnintstr.h"
#include "tinyx.h"
#include "Xpoll.h"

static int
Ps2ReadBytes (int fd, unsigned char *buf, int len, int min)
{
    int		    n, tot;
    fd_set	    set;
    struct timeval  tv;

    tot = 0;
    while (len)
    {
	n = read (fd, buf, len);
	if (n > 0)
	{
	    tot += n;
	    buf += n;
	    len -= n;
	}
	if (tot % min == 0)
	    break;
	FD_ZERO (&set);
	FD_SET (fd, &set);
	tv.tv_sec = 0;
	tv.tv_usec = 100 * 1000;
	n = select (fd + 1, &set, 0, 0, &tv);
	if (n <= 0)
	    break;
    }
    return tot;
}

char	*Ps2Names[] = {
    "/dev/psaux",
/*    "/dev/mouse", */
    "/dev/input/mice",
};

#define NUM_PS2_NAMES	(sizeof (Ps2Names) / sizeof (Ps2Names[0]))

static void
Ps2Read (int ps2Port, void *closure)
{
    unsigned char   buf[3 * 200];
    unsigned char   *b;
    int		    n;
    int		    dx, dy;
    unsigned long   flags;
    unsigned long   left_button = KD_BUTTON_1;
    unsigned long   right_button = KD_BUTTON_3;

#undef SWAP_USB
#ifdef SWAP_USB
    if (id == 2)
    {
	left_button = KD_BUTTON_3;
	right_button = KD_BUTTON_1;
    }
#endif
    while ((n = Ps2ReadBytes (ps2Port, buf, sizeof (buf), 3)) > 0)
    {
	b = buf;
	while (n >= 3)
	{
	    flags = KD_MOUSE_DELTA;
	    if (b[0] & 4)
		flags |= KD_BUTTON_2;
	    if (b[0] & 2)
		flags |= right_button;
	    if (b[0] & 1)
		flags |= left_button;
		
	    dx = b[1];
	    if (b[0] & 0x10)
		dx -= 256;
	    dy = b[2];
	    if (b[0] & 0x20)
		dy -= 256;
	    dy = -dy;
	    n -= 3;
	    b += 3;
	    KdEnqueueMouseEvent (kdMouseInfo, flags, dx, dy);
	}
    }
}

static int Ps2InputType;

static int
Ps2Init (void)
{
    long    i;
    int	    ps2Port;
    int	    n;

    if (!Ps2InputType)
	Ps2InputType = KdAllocInputType ();
    n = 0;
    for (i = 0; i < NUM_PS2_NAMES; i++)
    {
	ps2Port = open (Ps2Names[i], 0);
	if (ps2Port >= 0)
	{
	    if (KdRegisterFd (Ps2InputType, ps2Port, Ps2Read, (void *) i))
		n++;
	}
    }
    return n;
}

static void
Ps2Fini (void)
{
    KdUnregisterFds (Ps2InputType, TRUE);
}

KdMouseFuncs Ps2MouseFuncs = {
    Ps2Init,
    Ps2Fini
};