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/*
* Copyright © 2001 Stefan Gmeiner
* Copyright © 2003 Neil Brown
* Copyright © 2003-2005,2007 Peter Osterlund
*
* 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 Red Hat
* not be used in advertising or publicity pertaining to distribution
* of the software without specific, written prior permission. Red
* Hat makes no representations about the suitability of this software
* for any purpose. It is provided "as is" without express or implied
* warranty.
*
* THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL THE AUTHORS 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.
*
* Authors:
* Stefan Gmeiner (riddlebox@freesurf.ch)
* Neil Brown (neilb@cse.unsw.edu.au)
* Peter Osterlund (petero2@telia.com)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <xorg-server.h>
#include "synproto.h"
#include "synaptics.h"
#include "synapticsstr.h"
#include "ps2comm.h"
#include <xf86.h>
/* Wait for the channel to go silent, which means we're in sync */
static void
ALPS_sync(int fd)
{
byte buffer[64];
while (xf86WaitForInput(fd, 250000) > 0) {
xf86ReadSerial(fd, &buffer, 64);
}
}
/*
* send the ALPS init sequence, ie 4 consecutive "disable"s before the "enable"
* This "magic knock" is performed both for the trackpad and for the pointing
* stick. Not all models have a pointing stick, but trying to initialize it
* anyway doesn't seem to hurt.
*/
static void
ALPS_initialize(int fd)
{
xf86FlushInput(fd);
ps2_putbyte(fd, PS2_CMD_SET_DEFAULT);
ps2_putbyte(fd, PS2_CMD_SET_SCALING_2_1);
ps2_putbyte(fd, PS2_CMD_SET_SCALING_2_1);
ps2_putbyte(fd, PS2_CMD_SET_SCALING_2_1);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_ENABLE);
ps2_putbyte(fd, PS2_CMD_SET_SCALING_1_1);
ps2_putbyte(fd, PS2_CMD_SET_SCALING_1_1);
ps2_putbyte(fd, PS2_CMD_SET_SCALING_1_1);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_DISABLE);
ps2_putbyte(fd, PS2_CMD_ENABLE);
ALPS_sync(fd);
}
static Bool
ALPSQueryHardware(InputInfoPtr pInfo)
{
ALPS_initialize(pInfo->fd);
return TRUE;
}
static Bool
ALPS_packet_ok(struct CommData *comm)
{
/* ALPS absolute mode packets start with 0b11111mrl */
if ((comm->protoBuf[0] & 0xf8) == 0xf8)
return TRUE;
return FALSE;
}
static Bool
ALPS_get_packet(struct CommData *comm, InputInfoPtr pInfo)
{
int c;
while ((c = XisbRead(comm->buffer)) >= 0) {
unsigned char u = (unsigned char)c;
comm->protoBuf[comm->protoBufTail++] = u;
if (comm->protoBufTail == 3) { /* PS/2 packet received? */
if ((comm->protoBuf[0] & 0xc8) == 0x08) {
comm->protoBufTail = 0;
return TRUE;
}
}
if (comm->protoBufTail >= 6) { /* Full packet received */
comm->protoBufTail = 0;
if (ALPS_packet_ok(comm))
return TRUE;
while ((c = XisbRead(comm->buffer)) >= 0)
; /* If packet is invalid, re-sync */
}
}
return FALSE;
}
/*
* ALPS abolute Mode
* byte 0: 1 1 1 1 1 mid0 rig0 lef0
* byte 1: 0 x6 x5 x4 x3 x2 x1 x0
* byte 2: 0 x10 x9 x8 x7 up1 fin ges
* byte 3: 0 y9 y8 y7 1 mid1 rig1 lef1
* byte 4: 0 y6 y5 y4 y3 y2 y1 y0
* byte 5: 0 z6 z5 z4 z3 z2 z1 z0
*
* On a dualpoint, {mid,rig,lef}0 are the stick, 1 are the pad.
* We just 'or' them together for now.
*
* The touchpad on an 'Acer Aspire' has 4 buttons:
* left,right,up,down.
* This device always sets {mid,rig,lef}0 to 1 and
* reflects left,right,down,up in lef1,rig1,mid1,up1.
*/
static void
ALPS_process_packet(unsigned char *packet, struct SynapticsHwState *hw)
{
int x = 0, y = 0, z = 0;
int left = 0, right = 0, middle = 0;
int i;
hw->millis = GetTimeInMillis();
x = (packet[1] & 0x7f) | ((packet[2] & 0x78) << (7-3));
y = (packet[4] & 0x7f) | ((packet[3] & 0x70) << (7-4));
z = packet[5];
if (z == 127) { /* DualPoint stick is relative, not absolute */
hw->left = packet[3] & 1;
hw->right = (packet[3] >> 1) & 1;
return;
}
/* Handle normal packets */
hw->x = hw->y = hw->z = hw->numFingers = hw->fingerWidth = 0;
hw->left = hw->right = hw->up = hw->down = hw->middle = FALSE;
for (i = 0; i < 8; i++)
hw->multi[i] = FALSE;
if (z > 0) {
hw->x = x;
hw->y = y;
}
hw->z = z;
hw->numFingers = (z > 0) ? 1 : 0;
hw->fingerWidth = 5;
left |= (packet[2] ) & 1;
left |= (packet[3] ) & 1;
right |= (packet[3] >> 1) & 1;
if (packet[0] == 0xff) {
int back = (packet[3] >> 2) & 1;
int forward = (packet[2] >> 2) & 1;
if (back && forward) {
middle = 1;
back = 0;
forward = 0;
}
hw->down = back;
hw->up = forward;
} else {
left |= (packet[0] ) & 1;
right |= (packet[0] >> 1) & 1;
middle |= (packet[0] >> 2) & 1;
middle |= (packet[3] >> 2) & 1;
}
hw->left = left;
hw->right = right;
hw->middle = middle;
}
static Bool
ALPSReadHwState(InputInfoPtr pInfo,
struct CommData *comm, struct SynapticsHwState *hwRet)
{
unsigned char *buf = comm->protoBuf;
struct SynapticsHwState *hw = comm->hwState;
if (!ALPS_get_packet(comm, pInfo))
return FALSE;
ALPS_process_packet(buf, hw);
*hwRet = *hw;
return TRUE;
}
struct SynapticsProtocolOperations alps_proto_operations = {
NULL,
NULL,
ALPSQueryHardware,
ALPSReadHwState,
NULL,
NULL
};
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