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/* Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
*
* Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
* Copyright (c) 2003-2004 Peter Osterlund <petero2@telia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "alpscomm.h"
#include "synproto.h"
#include "synaptics.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[4];
while(xf86WaitForInput(fd, 250000) > 0) {
xf86ReadSerial(fd, &buffer, 1);
}
}
/*
* send the ALPS init sequence, ie 4 consecutive "disable"s before the "enable"
*/
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 void
ALPSDeviceOnHook(LocalDevicePtr local)
{
}
static void
ALPSDeviceOffHook(LocalDevicePtr local)
{
}
static Bool
ALPSQueryHardware(LocalDevicePtr local, struct SynapticsHwInfo *synhw)
{
ALPS_initialize(local->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, LocalDevicePtr local)
{
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;
ALPS_sync(local->fd); /* 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;
/* Handle guest packets */
hw->guest_dx = hw->guest_dy = 0;
if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */
x = packet[1];
if (packet[0] & 0x10)
x = x - 256;
y = packet[2];
if (packet[0] & 0x20)
y = y - 256;
hw->guest_dx = x;
hw->guest_dy = -y;
if (packet[0] & 0x01)
hw->guest_left = 1;
if (packet[0] & 0x02)
hw->guest_right = 1;
return;
}
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 */
if (x > 383)
x = x - 768;
if (y > 255)
y = y - 512;
hw->guest_dx = x;
hw->guest_dy = -y;
z = 0;
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(LocalDevicePtr local, struct SynapticsHwInfo *synhw,
struct SynapticsProtocolOperations *proto_ops,
struct CommData *comm, struct SynapticsHwState *hwRet)
{
unsigned char *buf = comm->protoBuf;
struct SynapticsHwState *hw = &(comm->hwState);
if (!ALPS_get_packet(comm, local))
return FALSE;
ALPS_process_packet(buf, hw);
*hwRet = *hw;
return TRUE;
}
static Bool
ALPSAutoDevProbe(LocalDevicePtr local)
{
return FALSE;
}
struct SynapticsProtocolOperations alps_proto_operations = {
ALPSDeviceOnHook,
ALPSDeviceOffHook,
ALPSQueryHardware,
ALPSReadHwState,
ALPSAutoDevProbe
};
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