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/*
* Id: ps2.c,v 1.1 1999/11/02 03:54:46 keithp 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.
*/
#define NEED_EVENTS
#include "X.h"
#include "Xproto.h"
#include "inputstr.h"
#include "scrnintstr.h"
#include "kdrive.h"
#include "Xpoll.h"
int
Ps2ReadBytes (int fd, 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;
}
void
Ps2Read (int ps2Port)
{
unsigned char buf[3 * 200];
unsigned char *b;
int n;
int dx, dy;
unsigned long flags;
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 |= KD_BUTTON_3;
if (b[0] & 1)
flags |= KD_BUTTON_1;
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 (flags, dx, dy);
}
}
}
char *Ps2Names[] = {
"/dev/psaux",
"/dev/mouse",
};
#define NUM_PS2_NAMES (sizeof (Ps2Names) / sizeof (Ps2Names[0]))
int
Ps2Init (void)
{
int i;
int ps2Port;
for (i = 0; i < NUM_PS2_NAMES; i++)
{
ps2Port = open (Ps2Names[i], 0);
if (ps2Port >= 0)
return ps2Port;
}
return -1;
}
void
Ps2Fini (int ps2Port)
{
if (ps2Port >= 0)
close (ps2Port);
}
KdMouseFuncs Ps2MouseFuncs = {
Ps2Init,
Ps2Read,
Ps2Fini
};
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