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-rw-r--r--hw/kdrive/ps2.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/hw/kdrive/ps2.c b/hw/kdrive/ps2.c
new file mode 100644
index 000000000..2d2612f55
--- /dev/null
+++ b/hw/kdrive/ps2.c
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+/*
+ * $Id$
+ *
+ * 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.
+ */
+/* $XFree86: $ */
+
+#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;
+ }
+}
+
+void
+Ps2Fini (int ps2Port)
+{
+ if (ps2Port >= 0)
+ close (ps2Port);
+}
+
+KdMouseFuncs Ps2MouseFuncs = {
+ Ps2Init,
+ Ps2Read,
+ Ps2Fini
+};